AIR PURIFICATION APPARATUS AND METHOD

An air purification apparatus and air purification method is disclosed. Air to be purified is drawn into an air purification unit for purification by a negative pressure, wherein the negative pressure region is created by a fan blower, and the air to be purified does not pass through the fan blower to prevent the fan blower being contaminated by the pollutants which presented in the air to be purified. With the present invention, the lifespan of the fan blower can be extended, and the fire alarm risk caused by accumulated pollutants can be decreased. The fan blowers with lower power consumption can be used to achieve the beneficial effects of energy saving and noise reduction.

FIELD OF THE INVENTION

The present invention relates to the field of environmental protection, in particular relates to an apparatus for air purification, and more particularly, relates to an air filter can be applied to machines, vacuum cleaners, kitchen range hood and other air cleaning devices and methods.

BACKGROUND OF THE INVENTION

Air pollutants are mainly divided into two forms: one is the particulates such as dust, bacteria, fungi and other larger shapes, the molecular structure of them is complicated, which comprises of a variety of different materials or ingredients from the size of about one hundredth of one micron to several hundred microns. Another forms of it is the gases such as odors, volatile organic compounds and other chemical elements, it has simple chemical structure, composed of several kinds of chemical elements, they are small in size, which only up to the scale of nanometers.

To remove the particulate contaminants in the air, it can be done usually by different filtration technologies. One of the conventional methods is to filter the air by paper-type filter. High efficiency filter paper (such as HEPA Filter) to remove the particulate type air pollutants may even be used. There is also method employing of an high-voltage electrostatic precipitator, which negative ions is released to charge up the suspended dust particulates in the air to negatively charged particulates, then allowed them to be collected when they approaches the relatively less negative, more neutral or positive charged components.

In order to treat different type of air pollutants, the air purifiers available in the market tend to employ more than one method of air purification and filtration technologies. The filter (or filters) and the fan being used are usually arranged in a series manner, namely “filter and fan are arranged in series as layer by layer manner”, wherein, an exhaust fan or a fan blower is employed to drive the air to flow from the upstream to the downstream of the device.

The arrangement method of “Filter and fan are arranged in series as layer by layer manner” leads to the problem of higher airflow resistance, high fan power consumption. When the filter having more particulate pollutants being adsorbed on its surface, it will further increase the static pressure and reduce the air flow passing through the air purifying device.

The arrangement method of “filter and fan are arranged in series as layer by layer manner” also causes another problem. Unless the high power type fan is used in combination with a high static pressure filter where a single way of airflow (single air path) when can achieve very good filtering effect, most general filter cannot completely purified the contaminants from the air stream, the unremoved contaminants which left in the air stream will attach to the fan, they will make the air fan blower and fan motor become dirty and weakened its life. For example, if the kitchen range hood utilizing this filter-and-fan-layer-by-layer-in-series arrangement method, due to the reason that the temperature drop in the downstream position, the gases phase pollutants at the upstream position, which cannot be caught by the oil grease removal filter, being condensed and become particulates phase pollutant at the downstream position, the condensed particulates phase pollutants then attach to the fan motor or the fan at the downstream position, apart from damaging the fan's life, it will also cause a fire hazard.

SUMMARY OF THE INVENTION

To solve the above problems, the present invention provides an apparatus and method for purifying air, a non-traditional design of “filter and fan are arranged parallel in same level” is employed to effectively removal of particulate contaminants in the air stream. The user will not need to replace the filter. The secondary pollution will also be removed. Fan with high power consumption will not be a necessity in the air purifying device of the present invention. This is because the static pressure produced by the air purifying apparatus and method in the present invention is low in comparing with the traditional method which the “filter and fan are arranged in series as layer by layer manner”. With the air purifying device as stated the present invention, even if there are some un-filtered contaminants, which cannot be removed by the filter in the air purifying device, they will not be attracted to the fan. Thus, the life of fan is being extended. In any case, the apparatus and method for purifying air in the present invention, can also be used as a high efficient apparatus and method for removing the particulate pollutants from the cooking fume in the kitchen range hood, When the gas type pollutants in the cooking fume, which exist at the upstream position become condense to particulates phase pollutant when they come to the downstream position, due to the dropping of the temperature, they are also easily be captured by the method as stated in the present invention. The present invention allows the emitted oil cooking fumes which are in gas type pollutants be timely be converted to particulates type pollutants which is larger in size, and be separated from the air stream in timely effectively.

at least one fan blower, the operation of the fan blower generates a first airflow;

at least one first airflow duct, the first airflow duct having a first air inlet, the first airflow in the first airflow duct flows from upstream to downstream;

at least one second airflow duct, the second airflow duct having a second air inlet, the second airflow flows from the upstream position to the downstream position at the second airflow duct; at one downstream position of the second airflow duct, the second airflow duct and first airflow duct merge together; the first airflow is flowing through the merging point of the of the first airflow duct and the second airflow duct, a negative pressure region in the second airflow duct is created; this makes the second airflow to be flown out from the second airflow duct and combines with the first airflow and forms a third airflow; and

at least one air purifying component being disposed at second airflow duct, and/or the airflow path of the third airflow, purifying the second airflow and/or the third airflow.

In one embodiment, the first airflow duct and the second airflow duct located at the upstream of the position of the air purifying device. The air from different sources are independently being drawn to the first airflow duct and the second airflow duct through the first air inlet and the second air inlet, acting as the first airflow and the second airflow.

In one embodiment, the first air inlet and the second air inlet draw in airflows of different temperatures. Further, the airflow being drawn into the first air inlet is of relatively lower temperature as compared to the airflow being drawn into the second air inlet.

In one embodiment, the airflows being drawn into first air inlet and the second air inlet are airflows of different levels of air pollutants. Further, the airflow being drawn into the first air inlet is of relatively lower levels of particulates phase and/or gases phase pollutants, compared to the airflow being drawn into the second air inlet.

In one embodiment, a whole or a partial amount of the gases phase pollutants in the second airflow, which being drawn into the second air inlet, will be converted to or be condensed into particulates phase pollutant upon the drop of temperature.

In one embodiment, the temperature of the airflow at the upstream position of the air purifying device is higher than that at the downstream of the air purifying device.

In one embodiment, the air purifying device further comprises at least one common airflow duct, the common airflow duct having a common air outlet, the common airflow duct located at the downstream position which is after the merging of the first airflow duct and the second airflow duct. The third airflow flows within the common airflow duct, and being discharged out through the common air outlet.

In one embodiment, the air purifying component is any one or more than one of the following components, in order to purify or reduce for the levels of pollutants in the second airflow and/or the third airflow: high voltage electrostatic precipitator, a filter, a filter components, centrifugal device and cyclone separator.

In one embodiment, the air purifying device further comprises a contaminant collection tank, the contaminant collection tank is equipped in any position in the air purifying device. The contaminant collection tank collects the larger dimension particulates phase pollutants which were formed from the condensation of the gases phase pollutant or tiny size particulates phase pollutant upon the dropping of the temperature.

In one embodiment, the contaminant collection tank is equipped within the air purifying component.

In one embodiment, the air purifying device comprise multiple units of cyclone separators being connected together in a series manner, the connection method is that an air outlet of one cyclone separator is connected to an air inlet of another cyclone separator, wherein, the air inlet of the cyclone separator at the most upstream position and the air outlet of the cyclone separator at the most downstream position, or the air outlet of the cyclone separator at the most upstream position and the air inlet of the cyclone separator at the most downstream position, are equipped at or are connected to the second airflow duct and/or the airflow path of the third airflow. The multiple units of cyclone separators purify the second airflow and/or the third airflow.

In one embodiment, the air purifying device further comprises at least one ultrasonic nebulizer and water reservoir tank, the ultrasonic nebulizer is placed within the water reservoir tank, when the ultrasonic nebulizer is in operation, some atomized water vapor with relatively lower temperature is generated; the atomized water vapor is introduced into and combine with the first airflow, or the second airflow before they flows into the air purifying component, or the third airflow before it flows into the air purifying component.

In one embodiment, the air purifying device further comprises at least one pre-cooling device, the pre-cooling device is installed at any location upstream of the air purifying component and downstream of the second air inlet.

In one embodiment, at least one air purifying component cooling device is further comprised, the air purifying component cooling device surrounds the air purifying component, when the air is flown through the air purifying component, and the temperature of the airflow is decreased.

In one embodiment, wherein in the air purifying component comprises single or multiple units of cyclone separators in a series connection and air purifying component cooling device. The air purifying component cooling device which is disposed within the contaminant collection tank of the cyclone separator, it lower down the temperature of the airflow which entering into the contaminant collection tank, wherein fine particulates pollutants will be coagulated or be condensed at the lower temperature, and they are then collected by the contaminant collection tank of the cyclone separator.

In one embodiment, the pre-cooling device, or the cooling device of the air purifying component is any device of a thermoelectric cooling module, or a semiconductor type cooling chip, or a water condenser.

In one embodiment, wherein the second air inlet is connected to a range hood connected to the second air inlet, the range hood concentrates to draw in the second airflow, which is to be purified.

In one embodiment, it further comprises an ion generator, the ion generator comprises an electronic means and an ion releasing tip, the ion releasing tip is placed upstream of the air purifying component.

In one embodiment, if the air purifying device comprises a single unit of cyclone separator or multiple units of cyclone separators connected together in a series manner, the ion releasing tip is placed upstream of contaminant collection tank of the cyclone separator.

In one embodiment, if at least an ultrasonic nebulizer and water reservoir tank is further comprised, the ion releasing tip is placed at the downstream position of the ultrasonic nebulizer and the water reservoir tank, and at the upstream position of the air purifying component; the atomized water vapor combines with the first airflow, or combines with the second airflow prior to the entering of the air purifying component, or combines with the third airflow prior to the entering of the air purifying component. The dust particulates are charged before they enter into the air purifying component.

In one embodiment, the ion releasing tip is placed in the path of the first airflow.

In one embodiment, the ion releasing tip is placed non-uniformly in the path of the first airflow that makes only a partial portion of the first airflow contains ionized air and/or containing the charged particulates.

In one embodiment, it further comprises an air mixing space, one end of the air mixing space connected with the air purifying component; another end of the air mixing space, connected with the first air inlet through the fan blower. The air mixing space is located at a position between the fan blower and the air purifying component.

In one embodiment, the air purifying component is a filter component, a filter component comprises a filter frame and filtering materials, the upstream side of the filter frame is connected to a electrical conducting frame, the electrical conducting frame is connected to the ground wire of the electronic means of the ion generator; or the filter frame of the filter component is a conductive frame.

In one embodiment, the fan blower is installed at the upstream position of the ion releasing tip, the filter component is installed at the downstream position of the ion release tip.

In one embodiment, the ion release tip is placed at the outlet of the fan blower, which is being placed closed to one side of the cross-section of the fan blower outlet.

In one embodiment, ion releasing tip is placed within the air mixing space where it is a junction region of the laminar or turbulent airflow located within the air mixing space, and/or a junction region of the laminar or turbulent airflow located within the air mixing space.

In one embodiment, the ion releasing tip is placed within the air mixing space, near to the adjacent side of the fan blower outlet, and closed to one side of that cross-section.

In one embodiment, the first airflow duct forms a first chamber, the first airflow duct having a first air outlet, the first air outlet located at anywhere downstream of the first chamber.

The second airflow duct forms a second chamber, the second airflow duct has a second air outlet, the second air inlet located within the first chamber, and between the first air inlet and the first air outlet, the second air inlet draw-in air directly from the first chamber;

The air purifying component comprises at least one primary filter, the primary filter is placed within the second chamber, and purify of all air flow into the second chamber.

In one embodiment, the second chamber is also equipped with at least one third air inlet, which can directly draw in air from the outside of the first chamber.

In one embodiment, the air purifying device comprises a by-pass mechanism for selecting if airflow to be drawn into the second chamber will be all come from the second air inlet, or all come from the third air inlet, or in partially come from the second air inlet and partially come from the third air inlet.

In one embodiment, the primary filter is placed in between the second air inlet, the third air inlet and the second air outlet; or there are at least two primary filters, placing at the second air inlet and the third air inlet respectively, all air that incoming to and effluence from the second chamber will pass through the primary filter.

In one embodiment, a partial of or a whole of the primary filter forming the second chamber, the air inlet side of the primary filter will be according to where the airflow coming from, whether it is from the first chamber or from the outside of the first chamber, be defined as the second air inlet or third air inlet; the support of the filtering materials of the primary filter formed a shape as an air outlet, and that will be regarded as the second air outlet.

In one embodiment, the air inlet side of the primary filter, relative to the direction of flow of the first airflow, forming an acute angle.

In one embodiment, the air inlet side of the primary filter, parallel to the direction of flow of the first airflow.

In one embodiment, the first outlet and the second outlet are a shaped as a gradually narrowing air outlet.

When one embodiment, a partial portion of the housing outside of the first air outlet having a curve-shaped flowing line surface. When the airflow is exhausted from the first air outlet, the exhausted airflow passes by the curve-shaped flowing line surface, it will be attached to the wall of it while flowing. The pressure outside of the exhausted airflow is higher in compared to the pressure at the within the airflow and the pressure of the airflow at the junction with the curve-shaped flowing line surface.

In one embodiment, further comprises a flow deflector, the deflector is placed in the first chamber, when airflow is drawn to flow from the upstream to downstream, the flow deflector guides the airflow to the direction of the first air outlet.

In one embodiment, the flow deflector employs the high-voltage electrostatic precipitator having a function for dust removal.

In one embodiment, it further comprises a pre-filter, the pre-filter is installed at downstream position of the first air inlet, and upstream position of the second air inlet.

The static pressure of the pre-filter is 120 Pa or less.

In one embodiment, the static pressure of the pre-filter is 40 Pa or less.

In one embodiment, the first airflow duct forms a main airflow system, the main airflow system comprises a first air inlet and a first air outlet, the main airflow system further comprises a first chamber, which is defined by the void between the first air inlet and the first air outlet. The first air outlet is located at any position downstream of the first chamber. At least one fan blower is employed to drive a main airflow, being defined as a first airflow, flowing from the upstream position to the downstream position within the first chamber, from the first air inlet to the first air outlet, and be exhausted out from the first air outlet.

The second airflow duct forms a side airflow system, the side airflow system comprises at least one housing, at least one second air inlet, at least one second air outlet, and at least one second chamber, the second air inlet being located at the most upstream of the housing, the second outlet located at the most downstream position of the housing.

The air purifying component comprises at least one primary filter, the primary filter is installed within the housing of the side airflow system, for purifying all the air which enters into the second chamber though the second air inlet. The primary filter is located at downstream position of the second air inlet, the second chamber is located at a position between the primary filter and the second air outlet.

The second air outlet of the side airflow system is located at a position which is adjacent to the first air outlet of the main airflow system, or slightly forward or slightly at a location upstream of the adjacent of the first air outlet.

In one embodiment, the primary airflow system is an electrical device which contains fan, the air inlet of the electrical device is defined as the first air inlet, the air outlet of the electrical device is defined as the first air outlet, and the airflow exhausted from the first air outlet is defined as the first airflow.

In one embodiment, the electrical device is an electrical fan, a dehumidifier, a humidifier, a cool machine, an air conditioner or a heater having a fan.

In one embodiment, the main airflow system further comprises at least one main airflow concentrator, the airflow concentrator is a device to collects and concentrates the first airflow, when the first airflow is discharged from the electrical device, it will first flow into the airflow concentrator, the first airflow is converted and reforms to a high-speed first airflow.

In one embodiment, the housing of the side airflow system comprises a hollow annular housing portion and a primary filter carrying portion, the hollow annular housing portion further comprises the second air outlet, the second air outlet is a gradually narrowing shaped-type outlet, or a nozzle-type outlet.

In one embodiment, the hollow annular housing portion comprises a curved shape portion, having the curvature at the side facing to the hollow circular core. When the second airflow is exhausted from the second air outlet, the effluent flows out from the void within hollow annular housing portion, a Coanda effect is created at the curved shape portion by exhausting second airflow, which towing the air outside the air purifying device and those air nearby the hollow annular housing portion, to flows through a central hollow part of the hollow annular housing portion together with the second airflow.

In one embodiment, the main airflow system comprises a hollow annular housing portion. It is operated in coordination with the hollow annular housing portion of the second air flow system. The second air outlet surrounds a whole or a partial part of the first air outlet; or the first air outlet surrounds the whole or a partial part of the second air outlet. When the first airflow is exhausted from the first air outlet, it will pass by the central hollow part of the hollow annular portion of the second airflow system.

In one embodiment, there are two or more than two side airflow systems.

In one embodiment, the primary filter carrying portion is forms by flexible duct tubing, the position of the second air inlet, can be extended to or shortened, or transferred for a different orientation.

In one embodiment, the shape of the primary filter is a standard shaped filter.

In one embodiment, at a face velocity of the airflow is 5.33 cm/s, it is an airflow resistance of the filter is 40 Pa or more.

In one embodiment, at a face velocity of the airflow is 5.33 cm/s, it is an airflow resistance of the filter is 25 Pa or more.

In one embodiment, at a face velocity of the airflow is 5.33 cm/s, it is an airflow resistance of the filter is 17 Pa or more.

An air purifying device utilizing an air purifying method, wherein the first airflow being drawn in and flow through the first airflow duct by a fan blower. When the first airflow flowing within the first air flow duct, it passes by a merging point where the first and the second airflow ducts were joined together, a negative pressure region is then induced at the second airflow duct; the second airflow is further induced and it is drawn to flow out from the second airflow duct, to merge with the first airflow, forming a third airflow. An air purifying component is equipped at the second airflow duct, and/or the airflow path of the third airflow, to purify the second airflow and/or the third airflow.

In one embodiment, with the non-uniform arrangement of the ion generator within the first airflow duct, only partial of the airflow becomes ionized and/or contains charged particulates.

Compared with the prior art, the air purifying system and method of the present invention utilize “filter and fan are arranged parallel in same level” “design. The air to be purified will not pass through the fan blower. A negative pressure region is created by the fan blower, the air to be purified is in-taken into the air purifying component by a vacuum suction action. Therefore, the un-filtered contaminants from the air purifying component will not be attract to adhere onto the fan blower, the fan blower's life is extended. When this is applied to a kitchen range hood, the fan blower of the air purifying device will not be docked with the particulates soot even with long term using, which would otherwise cause a fire hazard. Furthermore, since the fan blower will not be used to directly drive the air which are to be cleaned, even when filter of high-density or high static pressure is applied, it is not necessary that a high-torque fan blower must also be used, the result of energy saving and the effect of noise reduction can be achieved.

DETAILED DESCRIPTION OF THE EMBODIMENTS

To make the above-mentioned objectives characteristic features and the advantages of the present invention be more easily to be understood, the following are some detailed description of the embodiments of the present invention. The following description contains numerous specific details in order to enable the present invention to be fully understood. However, the present invention can be implemented in many other ways, other than those described herein. The person of original skill in the art can make similar improvements without departing from the connotation of the invention. The invention is not limited by the following disclosed specific embodiments.

It should be noted that, when an element is referred to as “is placed” on another element, it can be directly on another element or it can be located within another elements. When an element is considered to be “connected” to another element, it can be directly connected to another element or simultaneously, it may be presented as it is situated within another element.

Unless otherwise defined, all of the technical and scientific terms stated in the present invention, same meaning to that commonly understood by the person of ordinary skill in the art. The term used in the present invention as described herein is only some examples for the purpose of describing particular embodiments, it is not in any intention to limit the invention. As used herein, the term “and/or” includes any one or more of the associated listed items and all combinations.

As illustrated in theFIG. 1, the air purifying device of the present invention comprises a fan blower190, the operation of the fan blower190generate a first airflow111; a first air inlet110; a second air inlet120; a first airflow duct150; a second airflow duct160; a common airflow duct170; a common outlet130; an air purifying component180; the air purifying component180is disposed in the second airflow duct160, purifies the second airflow121.

Wherein the first airflow duct150and the second airflow duct160is placed at the upstream position of the air purifying component180, they independently drawn in the different sources of air streams, i.e., a first airflow111and the second airflow121. The first airflow111and the second airflow111flow within the first airflow duct150and the second airflow duct160respectively. The first airflow duct150and the second airflow duct160of the air purifying device are incorporated or connected together at the downstream position of the air purifying device, become common airflow duct170. The combined airflow, i.e., the third airflow131, is exhausted.

In one embodiment, the first air inlet110and second air inlet120drawn into the air with different temperatures. Further, the first airflow111being drawn in from the air inlet110has a lower temperature comparing to that of the second air airflow121which being drawn in from the second air inlet120.

In one embodiment, the first air inlet110and second air inlet120drawn into the air with different level of air pollutants. Further, the first airflow111being drawn in from the air inlet110has less particulates type and/or gases type pollutants comparing to that of the second air airflow121which being drawn in from the second air inlet120.

In one embodiment, all level or partial level of the gaseous forms pollutants in the second airflow121, which being drawn into the second air inlet120will be converted to particulate type pollutants by coagulation upon the drop of temperature.

In one embodiment, the temperature of the airflow at the upstream position of the air purifying device is higher than that at the downstream position.

The first air inlet110is connected to the fan blower190, the first airflow111is being drawn through the air inlet110by the fan blower190into the air purifying device. The first airflow111to flow through the first airflow duct150, and also flow through the merging point which the first airflow duct150and the second airflow duct160combined or connected. The first airflow111tows the second airflow121, and merges with the second airflow121forming a third airflow131, and enters to the common airflow duct170. The first airflow111passes through the merging point of the ducts, will form a negative air pressure region in the second airflow duct160, and then the second air stream121will be induced to be drawn into the second airflow duct160through the second air inlet120. The second air inlet120is connected to a suction hood140. When the second airflow121is drawn into the second airflow duct160, it will also pass through the air purifying component180, a second airflow121is purified by the air purifying component180, the first airflow111and the second airflow121merges together and form the third airflow131at the relatively downstream location, and flows within common airflow duct170. The third airflow131exhaust at the common air outlet131at the terminal of the common airflow duct170.

FIG. 2shows the second example of an embodiment of the present invention, it is structurally similar to the example 1, and excepting the air purifying component180is placed at the common airflow duct170and purifies the third airflow131.

Wherein, the first airflow111contains cleaned air. At least, compared to the second airflow121which has not yet be purified by the air purifying component180, and/or the third airflow131which has not yet been purified by the air purifying component180, the first airflow111comprises fewer air pollutants. The second airflow121is the air containing contaminants and waiting to be purified.

Further, the contaminants refer to particulate type pollutants.

Further, at higher temperature, the second airflow121contains relatively higher concentrations of gases type pollutants or fine particulate type pollutants; at lower temperature, the gases type pollutant is converted to fine particulate type pollutants, or fine particulate type pollutants is coagulated to larger size particulate type pollutants.

In some embodiments, the air purifying device further comprises at least an ultrasonic nebulizer and water reservoir tank, the ultrasonic nebulizer is placed within the water reservoir tank. When the ultrasonic nebulizer is in operation, it produces small mist or atomized water vapor which has lower temperature compared to that of the pollutants in the air.

The small mist or atomized water vapor is pumped to, or be directed by a pipe to the airflow which not yet been purified; they are the first airflow111, the second airflow121which before it is entering to the air purifying component180, or the third airflow131which before it is entering to the air purifying component180.

When the small mist which is of lower temperature being mixed with the airflow which contains the gases type pollutants and the particulate type pollutant, it will reduce the temperature of that airflow. This device is particularly suitable for apply to remove certain contaminants which comprising the gases type pollutants, and will condenses into particulate type pollutants upon the drop of temperature, such as odor or fumes type contaminants that being produced during cooking. As most of contaminants in the airflow are in the form of gaseous phase, on when the tiny mist reducing the temperature of the airflow, the oil pollutant that original exist as gases phase pollutants in the cooking fume will condense to form the larger size particulate type pollutants. As the same time, the fine particulate type pollutant in the cooking fume will also collide with the tiny mist, and further coagulated and increase their sizes to larger sizes particulate type pollutants. As the physical characteristics of particulate type pollutant become is getting more obvious, it is more effective for the air purifying components to separate them out.

Further, the ultrasonic atomizer in the water reservoir tank stores solutions of different hydrophilic characteristics or functions, (e.g., a solution containing a detergent, a solution containing bactericides, a solution containing enzymes with cleaning property, etc.), The tiny mist or the atomized water vapor produced therefore having with different characteristics. It is even more compatible with gases type pollutants of the coking fume that present in the airflow. The effect of pollutants removal in the air purifying device is enhanced.

An ultrasonic nebulizer employs the method of high-frequency electronic oscillation to convert that water in the water reservoir tank to tiny mist or water atomized vapor.

In some embodiments, an ultrasonic nebulizer having an oscillation frequency of 1.7 MHz or 2.4 MHz.

In some embodiments, the ultrasonic nebulizer vaporizes the water to tiny mist or atomized water vapor, comprises the small mist size of 1 μm to 5 μm in dimension.

In some embodiments, on comparing the first airflow111and the second airflow121, the first airflow111has a lower temperature. When combining the first airflow111and the second airflow121, the thermal energy of the first airflow111and the second airflow121is transferring (Heat Transfer) to each other. Further, after the thermal energy transfer to each other by the first airflow111and the second airflow121, the temperature level of the third airflow131is low enough that it is sufficient to let the gases phase pollutant within it be cooled down and condenses into a larger dimension of particulate type pollutant, which is more readily to be captured by the air purifying component180.

In some of the embodiments, for the purpose to reduce the level of particulate contamination in the airflow, the air purifying component180is in used. The air purifying component180is any one or more of the following components: a high-voltage electrostatic precipitator, a filter, a filter components, centrifugal device and cyclone separators.

In one embodiment, the air purifying component180is multiple units of cyclone separators being connected together in a series manner, the connection method is that an air outlet of one cyclone separator is connected to an air inlet of another cyclone separator

FIG. 3shows the third example of an embodiment of the present invention, its structure is similar to the one shown in the example 2, except that the air purifying device further comprises at least one pre-cooling device181and ion generator184.

Pre-cooling device181is placed at an upstream position of the air purifying component180. In the present embodiment, the pre-cooling device181placed in a position which is located in the second airflow duct160, it will deliberately reduce the temperature of the second airflow121before the second airflow121entered into the air purifying component180.

In one embodiment, the pre-cooling device181can also be placed in the first airflow duct150, or at the merging point of where the first airflow duct150and the second airflow duct160are combined or connected.

When the air containing contaminants which is to be purified, as those in the second airflow121which is being drawn in as in the present invention, once the temperature of it is lowered, the air density of it would also be decreased, so as the kinetic energy of the particulate pollutants within the airflow. The distances between the particulates in the airflow is decreased and become closer as well, due to the decreased and weaken of the kinetic energy of the particulate pollutants in the airflow. As when the particulate pollutants within the airflow are getting closer to each other, the collisions would be occurred in between them. As within the third airflow131of the present invention, nucleation effect will then be induced by the collisions of the particulates, larger dimension particulates pollutants would then be formed, it will be easier for the air purifying component180to capture them at the downstream position.

In addition, the ion generator184comprises an electronic means183and an ion releasing tip,182; the ion release tip182is disposed at the upstream position of the air purifying device180. Any airflow which flow through the ion-release tip182will become an airflow containing ions, or an airflow carrying charged particulates. In the present embodiment, the ion releasing tip182is disposed on the airflow path of the first airflow111, so that the first airflow111which passes through the ion releasing tip182becomes an airflow containing ions or an airflow carrying charged particulates.

When the first airflow111containing ions, or carrying charged particulates is flowing through the first airflow duct150, it will eventually flowing across the merging point at where the first airflow duct150and the second airflow duct160are combined or connected. Then the airflow enters the common airflow duct170. When the first airflow111is flowing through the merging point, it creates a negative air pressure region within the second airflow duct160, and resulting that the second airflow121to be drawn into the second airflow duct160through the second air inlet120. As the first airflow111containing ion or carrying charged particulates, on combining with the second airflow121within the common airflow duct170, collision is occurred. The airflow containing ions or carrying charged particulates then become nuclei. In the third airflow131as described in the present invention, nucleation effect will be induced. The larger dimension particulates will therefore be coagulated and formed. The larger size particulates are easier to be capture by the air purifying component180at the downstream position.

In addition to the pre-cooling device181which is placed in the second airflow duct160as shown in the third example, the pre-cooling device181can also be placed in a common airflow duct170(as long as the pre-cooling device181is placed at the upstream position of the air purifying component180). When the temperature of the common airflow duct170is lowered, so as the kinetic energy of the particulate pollutants within the airflow. The distances between the particulates in the airflow is decreased and become closer, due to the weakened of the kinetic energy of the particulates, and the lowered density of the air. As when the particulates within the airflow is closer to each other, with the further collision in the combined airflow with the that ions or charged particulates, the ion or charged particulates in the airflow will induce an nucleation effect, larger dimension particulates pollutants would then be formed, it will be easier for the air purifying component180to capture them at the downstream position.

FIG. 4shows the forth example of an embodiment of the present invention, with the structure similar to Example 1 except it comprise two air cleaning components180,185. The two air purifying components180,185are disposed in the second airflow duct160and common airflow duct170respectively, purifying the second airflow121and the third airflow131.

FIG. 5shows the fifth example of an embodiment of the present invention of an air purifying device, it comprises a first air inlet510, a second air inlet520, a fan blower590, an air purifying component580, a first airflow duct550, a second airflow duct560, a common airflow duct570and a common outlet530. Wherein the air purifying component580further includes an air purifying component air inlet582and an air purifying component air outlet583. The air purifying component580of the present embodiment is a cyclone separator. The cyclone separator584comprises a contaminant collection tank, a cyclone separators air inlet and a cyclone separator air outlet, the cyclone separator air inlet is equivalent to the air purifying component air inlet582as mentioned above, the cyclone separator air outlet is equivalent to the air purifying component air outlet583as mentioned above. In the present embodiment, the second air inlet520is also connected to a suction hood540. The air inlet of the fan blower590, through the first airflow duct550, is connected to the first air inlet510. At the other end where the first airflow511is output through the air outlet of the fan blower590, through the common airflow duct570, it is connected to the air purifying component air inlet582, i.e., the cyclone separator air inlet. The entire cyclone separator is placed at a position on the common duct570(i.e. air purifying component air inlet582and air purifying air outlet583are connected to a common airflow570), for purify the third airflow531.

The fan blower590delivers the first airflow511through the first airflow duct550to the common airflow duct570, and then further into the cyclone separator air inlet; wherein, at the upstream position of the cyclone separator, the first airflow duct550is connected to the second airflow duct560, after the merging point, the common airflow duct570, transport mixed air, which are from the first airflow511that drawn in from the first air inlet510and the second airflow521that drawn in from the second air inlet520. In this embodiment, the common airflow duct570which is after the merging point that connecting the first airflow duct550and the second airflow duct560, is very close to the cyclone separator air inlet. When the fan590outputs a first airflow511through the first airflow duct550, the first airflow further flows to the merging point that connecting the first airflow duct550and the second airflow duct560. A negative air pressure is formed within the inner space of the second airflow duct560. The air that containing particulates pollutant, i.e., the second airflow521, is being drawn into the second airflow duct560through the second air inlet520. It is further drawn into the cyclone separator581. The particulates pollutant532is then collected at the contaminant collection tank584. The cyclone separator outputs the purified air, i.e., the already purified third airflow531, and let it be exhausted at the common air outlet530which is located at the end of the common airflow duct570.

FIG. 6shows the sixth-a example of an embodiment of the present invention of an air purifying device, comprises a first air inlet610, a second air inlet620, the fan blower690, air purifying component680, a first airflow duct650, a second airflow duct660, a common airflow duct670and a common air outlet630. The air purifying component further comprises an ion generator687, the ion generator687comprises an electronic means688and an ion releasing tip689. The air purifying component680further comprises an air purifying component air inlet682and an air purifying component air outlet683. The air purifying component680of the present embodiment is a cyclone separator, the cyclone separator681comprises contaminant collection tank684, cyclone separator air inlet and cyclone separator outlet, cyclone separator air inlet is above mentioned the air purifying component air inlet682, cyclone separator air outlet is above mentioned the air purifying component air outlet683. In the present embodiment, the second air inlet620is also connected to a suction hood640. One air of the fan blower690which is for air intake, through the first airflow duct650, is connected to the first air inlet610. Another end of the fan blower690which is for output of the first airflow611through the first airflow duct650, connects the second airflow duct660m, forming a common airflow duct670after the connection. An air purifying component680is placed in a location at the second airflow duct660. (i.e., the air purifying component air inlet682and air purifying component air outlet683are connecting with the second airflow duct660) to purifying the second airflow621.

In this embodiment, the first airflow611being drawn in to the air purifying device through the first air inlet610by the fan blower690. The first airflow611to flow within the first airflow duct650, and pass through the ion releasing tip689. Partial of the first airflow611become an airflow containing ions or an airflow containing charged particulates, and then flows through the merging point which connect or combine the first airflow duct650and second duct660, and further enter into the common airflow duct670. When the first airflow611pass through the merging point, it results a negative air pressure region to be formed within the second airflow duct660, which further results the second airflow621to be drawn into the second airflow duct660from the second air inlet620. The second air inlet620is connected to a suction hood640. When the second airflow621is drawn into the second airflow duct660, it will also pass through the air purifying component680, that is, it will enter into the cyclone separator air inlet, the particulate pollutants623is collected by the contaminants collection tank684, the cyclone separator air outlet outputs the purified air, i.e. the purified second airflow622. Together with the purified first airflow611, merges into a third airflow631at the more downstream position of the common airflow duct670. It is then flow within the common airflow duct670. The third airflow631flows to the common air outlet630at the end of the common airflow duct670and are exhausted.

In some embodiments, the air purifying device may further comprise more than one first airflow duct, more than one second airflow duct, and more than one common flow duct. As indicated in theFIG. 6b, wherein showing the sixth-b example of an embodiment of the present invention of an air purifying device, the air purifying component air inlet582ais connected to the air inlet of a common airflow duct570a(The connection method is similar to the embodiment as shown in the Example 5);

In this embodiment, the fan blower590aoutputs the first airflow511athrough the first airflow duct550a, and directly blows it to the common air flow duct570a, and it further enters into air inlet582aof the cyclone separator (air purifying component). Wherein, at the upstream position of the cyclone separator (air purifying component580a), the first airflow duct550ais connected to the second airflow duct560b, after the merging point, the common airflow duct570a, transport mixed air, which are from the first airflow511athat drawn in from the first air inlet510aand the second airflow521athat drawn in from the second air inlet520a. In this embodiment, the common airflow duct570awhich is after the merging point that connecting the first airflow duct550and the second airflow duct560a, is very close to the cyclone separator air inlet. When the fan590aoutputs a first airflow511athrough the first airflow duct550a, the first airflow further flows to the merging point that connecting the first airflow duct550aand the second airflow duct560a. A negative air pressure is formed within the inner space of the second airflow duct560a. The air that containing particulates pollutant, i.e., the second airflow521a, is being drawn into the second airflow duct560athrough the second air inlet520a, through the suction hood540aof the second air inlet520a. It is further drawn into the cyclone separator (air purifying component580a). The particulates pollutant532ais then collected at the contaminant collection tank584a.

The cyclone separator (air purifying component) air outlet583aconnect to another second airflow duct660a, the other second airflow duct660aand another first airflow duct650aand another common airflow duct670aare connected.

The first airflow611ais being drawn into the air purifying device through the first air inlet610aby the fan blower690a. The first airflow611aflowing within the first airflow duct, and passing through the merging point where connecting and combining the first airflow duct650aand second airflow duct660a, and flow into the common airflow duct670a. When the first airflow611aflow to the merging position, it creates a negative air pressure region within the second airflow duct660a, which further draws the second airflow621a(i.e., the airflow effluence from the air purifying component air outlet583a) from the cyclone separator (air purifying component) outlet583ato the second airflow duct660a.

In some embodiments, the fan blowers590aand690acan also be derived from the same fans (that is, only one fan blowing a first airflow511aand another first airflow611a, both through the first air inlet510aand610a, flow into the first airflow duct550aand650arespectively.

Due to the reason that: (a) the air purifying component air inlet582ais connected to the common airflow duct, the common airflow duct is equipped with a fan blower590ato blow out the first airflow510adirectly, and (b) the air purifying component air outlet583ais connected to the second airflow duct660a, which within the second airflow duct660a, it will become negative pressure region, when the first airflow611ais flowing through the merging point, at where the first airflow duct650aand the second airflow duct660ais combined or connected. This direct method of inputting and outputting the air by the air purifying component580aresulting a strong input and output airflow, which can resist the pressure drop and head loss by the air purifying component580a.

In some embodiments, the air purification component580ais multiple units of cyclone separators connecting in series, the connection method is that an air outlet of one cyclone separator is connected to an air inlet of another cyclone separator

In some embodiments described above, the air purifying device may further comprise at least one ion generator. For example, as shown inFIG. 6a, the ion generator684comprises an electronic means683and an ion releasing tip682. The ion releasing tip682is placed at the outlet of the fan blower690. Further, the ion releasing tip682is placed at the upstream position of the air purifying component680(i.e., the cyclone separator). In the present embodiment, the ion releasing tip682disposed in the first airflow duct650.

In the present embodiment of5and6a, the outer housing of the cyclone separator is connected to a pre-cooling device681(as shown in theFIG. 6a), the pre-cooling device681cool down the air which pass through the cyclone separator.

Further, the outer housing portion of the cyclone separator also equipped with an air purifying component cooling device, air purifying element cooling device is placed at the external position of air purifying component and surrounds the air purifying component. This will lower the temperature of the airflow when it is flowing into the air purifying component.

In one of the embodiments, the air purification component is multiple units of cyclone separators connecting in series, the air purifying component cooling device is placed within the contaminant collection tank of the cyclone separator. This will lower the temperature of the pollutants when it is entering into the contaminant collection tank of the cyclone separator. Condensation or coagulation will happen for the fine particulates in the airflow when the temperature of them lowered. They will then be collected by the contaminant collection tank of the cyclone separator.

The air purifying component cooling device is a thermoelectric cooler module, a semiconductor type cooling chip, or a water condensing cooling unit, or a device similar functions.

When the air purifying device is applied to a kitchen range hood, the air which flow into the air purifying component will have higher temperature. The air pollutants in the airflow comprises mostly in gases phase, when they enter into the pre-cooling device, and/or air purifying component cooling device, the temperature of the airflow will decreased. The oil mist that present as gases phase in the cooking fume, will be cooled and further condensed into the larger dimension particulate type pollutants. As the physical characteristics of larger dimension particulate is obvious, they can be effectively be separated by the air purifying component.

Further, the outer housing of the cyclone separator part, connected to the heating device685. After a period of operation, some particulate contaminants become thickened and stick to the inner surface of the housing of the cyclone separator. On shutting down the operation of the air purifying component, the user can turn on the heating device685, this will lowers the viscosity thickened oil that stuck on the cyclone separator casing, and allow them to flow to the contaminant collection tank684.

FIG. 7illustrates the seventh example of an embodiment of the present invention, different way of merging the first airflow duct and the second airflow duct is described. The specific meaning as indicated in the label ofFIG. 7are: the first airflow711; the second airflow721; the third airflow731; the first airflow duct750; the second airflow duct760; the common airflow duct770. When the first airflow711is being drawn into the air purifying device through the first air inlet by the fan blower, it is flow within the first airflow duct750, and passes through a merging point where the first airflow duct750and the second airflow duct760being combined or connected. The airflow further enters to a common airflow duct770. Wherein, at the position where the first airflow duct750and second airflow duct760merge or connect, the cross section area of it is smaller than the cross section area of the first airflow duct750. The first airflow duct750is gradually narrowed, having the minimal pressure at the merging point, when the first airflow711is passing through merging point, it will form a negative pressure within the second airflow duct760, and this will then enable the second airflow721to be drawn into the second airflow duct760through the second air inlet. The merging point or connected position, further comprises the following characteristics:

(a) the first airflow duct750and the common airflow duct770are aligned linearly, such as that shown by the devices70A,70B,70C and70D;

(b) a second airflow721is branched to flow within different second airflow ducts760, they are connected to the first airflow duct750which the cross-sectional area being gradually narrowing, and/or the common air flow duct770, there are the best, the biggest attraction force for the second airflow760duct from the hood, such as that shown by the devices70A,70B,70C below;

(c) the first airflow duct750is a duct having the cross-sectional area being gradually narrowing. At the where it is the narrowest, the first airflow711tow the second airflow721and combined to form a third airflow731.

(d) There is no restriction on the direction on the third airflow by the combined airflow, such as that shown by the devices70D.

FIGS. 8aand 8bfurther illustrates the eighth example of an embodiment of the present invention which a cross section diagram (FIG. 8a) and a perspective view (FIG. 8b) are shown. The 8 embodiment explain in details when the device70D is being put in theFIG. 7. The 8th embodiment illustrates an example of the air purifying device in the present invention.

FIG. 8ashowing a cross section view of an air purifying device, a first airflow duct856is composed by an inner sidewall855and outer sidewall856, which are in opposed to each other. The inner sidewall855and outer sidewall856as shown in the cross section view is in a cyclic structure, for example, as an “O” shaped cyclic structure. The space between the inner sidewall855and outer sidewall856form an annular conduit lumen850B. The inner sidewall855surrounded a hollow channel860. Wherein at one end, the inner sidewall855and the outer sidewall856are connected. At the other end, to the inner sidewall855and the outer sidewall856forms a slit853; at least one extending channel is850A is connected to the annular conduit lumen850B, it delivery a first airflow811to the conduit annular lumen850B, the first airflow811is then being discharged through the slit853. It is therefore, in the present embodiment, the annular conduit lumen850B and extending channel850A is being understood as a first airflow duct. The hollow channel860in this embodiment is being understood as the second airflow duct. The first airflow811is being input into the extending channel850A to the annular conduit lumen850B, it is then being expelled from the slit853. This process will create a negative air pressure region with the hollow channel860, the second airflow821then being flown in, from one end of the hollow channel860to another end of the hollow channel860. At a point near to the slit853where the first airflow exhausts, the second airflow821merges with the first airflow811, and form a third airflow831, which is then be discharged.

In the present embodiment, the first airflow duct850A,850B and second airflow duct860are placed at the upstream positions of the air purifying component880, which respectively independently drawn in air from different sources, being regarded as the first airflow811and the second airflow821. The first airflow811and the second airflow821flow within the first airflow duct850A,850B (i.e. the annular conduit lumen850B and the extending channel850A) and the second airflow duct860(i.e. hollow channel860). The first airflow811and the second airflow821merge at the upstream location (i.e., at the slit853where the first airflow811being exhausted) of the air purifying component, forming a third airflow831, the combined airflow will then be discharged. Wherein, the first airflow811containing clean air, at least, compared to the second airflow821, which has not yet be purified by the air purifying component880, the first airflow811comprises a less air pollutants. The second airflow821contains the air pollutants which are to be purified.

Wherein, an air purifying component880is placed within the second airflow duct860and/or the path871of the third airflow831of the860, for purifying the second airflow821or/and the third airflow831. The air purifying component880is any component that functions to reduce the levels of air contaminants.

Further, the air purifying device comprises an ion generator, the ion releasing tip882of the ion generator is disposed on the path of the first airflow811, so that all the first airflow811which did passing through the ion releasing tip882will become an airflow contains ions or an airflow contains charged particulates.

Further, the air purifying device in the present embodiment further comprises at least one pre-cooling device881, the pre-cooling device881is disposed at an upstream position of the air purifying component880, the pre-cooling device881lowers the temperature of the second airflow821. Further, in this embodiment, the pre-cooling device881is placed at one position of the sidewall855, or within the hollow channel860, to deliberately reduce the temperature the second airflow821quickly.

The Ion-containing airflow, or the first airflow811containing charged particulates flow within the first airflow duct (i.e. the annular conduit lumen850B and extending channel850A), and be discharged from the slit853of the first airflow duct.

The air containing contaminants which are be purified, as the second airflow821which is being in taken as described in the present invention, having it temperature being lowered by the pre-cooling device881, will have the air density be decreased, and so as the kinetic energy of the particulate pollutant within the airflow. The distance between the particulate pollutants is decreased and they get closer to each other, which caused by decreased of the air density and the weakened of the kinetic energy of particulate pollutants. When the distance of the particulate pollutants becomes closer, further merging or collide with the airflow that contains ion or containing the charged particulates, such as the first airflow811which is being described in the present invention, the ion or the charged particulates in the airflow will become the nuclei for nucleation effect to happen, similar to that happened in the third airflow831as describe in the present invention. The particulates will then be integrated and knot to form larger dimension particulate pollutants. The larger particulate pollutants will be more easily to be capture by the air purifying component880.

In this embodiment, the air inlet of the second airflow821is further connected to a suction hood840. Further, the air purifying component880is a high-voltage electrostatic precipitator which has low airflow resistance. It does not affect the flowing path of the third airflow831. It has certain distance with the first airflow duct. The distance is far enough in such a way that the second airflow821which being towed by the first airflow811will not be obstructed by the air purifying component.

FIG. 9illustrates another way of merging the first airflow duct and the second airflow duct in the present invention. The meaning of the labels as specified in theFIG. 9are: the first airflow911; the second airflow921; the third stream931; the first airflow duct950; the second airflow duct960; the common airflow duct970. Wherein, the second airflow duct960is being inserted within the first airflow duct950. The final direction of airflow path of the second airflow921(i.e., where it is discharged from the second airflow duct), is the same direction as the airflow path of the first airflow and the airflow path of the subsequently third airflow931. Further, the outlet of the second airflow duct960in located at the narrowest position within the first airflow duct950; further, the outlet of the second airflow duct960in located at the minimum cross-sectional position within the first airflow duct950; the common airflow duct970is a gradually enlarging duct, which enlarges from the location of the narrowest cross-sectional area.

The present invention is illustrated with a several specific embodiments as described above. Without departing from the scope of the invention, the present invention can also be changed, be varied and be substituted equivalently. As long as a first airflow which generated by the fan blower creates a negative pressure region, which lead to the drawn in of the second airflow which contains the pollutants and yet to be purified, into the air purifying component from the second air inlet; or by employing a cooling device to lower the temperature of the air that contains the particulate pollutants; or with further combination of one airflow to another airflow that contains ion, or another airflow that contains the charged particulates for acting as nuclei in a nucleation effect within the cooled air, so that some larger dimension particulates pollutants are formed from some finer particulate pollutants, after integrating them together; the larger dimension particulate pollutants are then captured by the air purifying component; or with the combination of any of the above methods to a cyclone separator and by sudden changing the temperature, converting the gases phase pollutants to particulates phase pollutants, or changing the respective concentrations of the gases phase pollutants and the particulates phase pollutants, all fall into the spirit of the present invention. In addition, for specific situations, various modifications without departing from the scopes of the invention can be performed. Accordingly, the present invention is not limited to the particular embodiment as disclosed herein, but all embodiments that will fall within the scope of the claims of the invention.

The present invention of air purifying device employing a fan blower to generate a first airflow which then consequently creates a negative pressure region, the air containing pollutants which is to be purified, is drawn into the air purifying component from a second air inlet. When the air purifying device is applied to cooker hood, the cooking fume to be cleaned is drawn to the air purifying device from the second air inlet. Since the contaminant is avoided from being adsorbed onto the fan blower, the risk of catching fire by the fan blower is reduced. The life of the fan blower is also extended. Further, by avoiding the design of “filter and fan are arranged in series as layer by layer manner”, even if filter with a higher airflow resistant is in used within the air purifying component, a higher torque motor or fan blower with backward blade fan may not be necessary to be used. It is well known that though higher torque motor or the fan blower with backward blade can overcome the system with high airflow resistance, they are of high energy consumption and generate high noise level. The above-described embodiments of air purifying devices provided the advantages of energy saving and noise reduction. Apart from being applied as cooking fume purification device, the air purifying device can be used equipped with various types of air purifying component for different types of pollutants purification. The following provides the further description on the modification on application of air purifying device.

In some embodiments, the air purifying device comprises at least a first chamber, the first chamber includes at least one air inlet (hereinafter referred to as the “first air inlet”) and at least one air outlet (hereinafter referred to as the “first air outlet”), said first outlet located at any position downstream of the first chamber; and

at least one second chamber, the second chamber comprises at least one air inlet (hereinafter as “second air inlet”) and at least one air outlet (hereinafter as “second air outlet”) is the second air inlet is disposed within the first chamber, and it is located between the first air inlet and the first air outlet, the second air inlet draw in air directly from the first chamber; the second air outlet is located adjacent to the first air outlet adjacent, or at a position slightly upfront (slightly upstream) abutting to the first air outlet; and

at least one filter (hereinafter referred to as “the primary filter)”; the primary filter is disposed within the second chamber, and purify all air that enter into the second chamber.

Alternatively, the air purifying device comprises at least one main airflow system and at least one side airflow system;

The main airflow system includes at least one air inlet (hereinafter as “first air inlet”) and at least one air outlet (hereinafter as “first air outlet), the main airflow system comprise a space which is located between the first air inlet and the first air outlet (hereinafter referred to as the “first chamber”), the first outlet located anywhere downstream of the first chamber, at least one fan blower to drive a first airflow, to flow within the first chamber from the upstream to the downstream, from the first air inlet to the first air outlet, and be discharged from the first air outlet;

The side airflow system includes at least one housing and at least one filter (hereinafter as “the primary filter), at least one air inlet (hereinafter referred to as the “second air inlet”) and at least one air outlet (hereinafter as “second air outlet”), at least one space (hereinafter referred to as “second chamber”); the primary filter is located within the housing of the side airflow system, to purify all air flow into the second chamber through the second air inlet. The second air inlet is located at the most upstream position of the housing, the second air outlet is located at the most downstream position of the housing, the primary filter is located downstream of the second air inlet, the second chamber is located in a position which is between the primary filter and the second air outlet;

The second air outlet is located adjacent to the first air outlet adjacent, or at a position slightly upfront (slightly upstream) abutting to the first air outlet.

When the air within the air purifying device is driven to flow from the upstream to the downstream (hereinafter as “the first airflow”), it flow from the first air inlet to the first chamber, and then be discharged from the first air outlet directly. When the first airflow is exhausted from the first air outlet, the air at the position which is adjacent to, or the air at the position which is slightly upfront (slightly upstream) abutting to the first air outlet, i.e., the air around the second air outlet, is in traction by and be discharged with the first airflow, a negative air pressure region (hereinafter called “negative pressure area”) is produced within the second chamber, the second airflow enters to the second chamber through the second air inlet, and this airflow is being purified by the primary filter.

Further, the second airflow which being in traction by the first airflow and exhausted from second air outlet combined with the first airflow and be exhausted from the first air outlet.

Further, an electrical device (such as electric fans, dehumidifiers, humidifier, cooling unit, air conditioners, heater etc.) containing another fan make the main airflow system. The air inlet of the electrical device is defined as the first air inlet; the air outlet of the electrical device is defined as the first air outlet; the air exhausted from the first air outlet is defined as the “main airflow” (i.e. the first airflow). The main airflow system is the electrical device, the location of its first air outlet is located at a position which is adjacent to the second air outlet of the side airflow system. Further, the first air outlet in a position slightly upfront of the second outlet.

When the first airflow is discharged from the first air outlet of the electrical device, the air at the second air outlet also is in traction by the exhausting airflow, from the second air chamber, it will be exhausted out through the second air outlet. The second chamber (i.e., the space within the second airflow system) becomes a negative air pressure region (hereinafter “negative pressure region), the air with pollutant enter into the second chamber through the second air inlet, on passing through the primary filter, the second airflow is purified by the primary filter.

Further, the first outlet is in a shape which is as a gradually narrowing outlet, this increase the speed of the first airflow, to enhance the negative air pressure effect within the second chamber. This is because, at the narrowest point, the dynamic pressure of the first airflow (velocity head) reaches to a maximum value, and the static pressure (static pressure) reach to a minimum value. Due to the change on the cross-section of the first airflow, the speed of it is increase. As the entire airflow is experiencing a process of passing through a narrowed first air outlet, the static pressure is reduced at the same time. Thereby a pressure difference is generated, this pressure offers an external suction force for the side airflow, so the second chamber of negative air pressure is produced. Therefore, if the first air outlet is in a shape gradually narrowing first outlet, a better negative air pressure effect will be produced in the second chamber.

When the main airflow system is an electrical device (such as electric fans, dehumidifiers, humidifier, cooling unit, air conditioners, heater etc.) containing another fan make the main airflow system. Further, when the electrical device is engaged with the side airflow system, the main airflow system further comprises at least one main airflow concentrator, which is a main stream concentrator is a device to collect and focus the first airflow. When the first airflow is discharged from the electrical device, it will first enters to the main stream concentrator, the main airflow concentration then converts and reorganize of the first airflow to a high-speed first airflow. The main stream concentrator comprises an air outlet which is in a shape of gradually narrowing.

Further, the side airflow system further comprises a hollow annular housing portion and a primary filter carrying portion, said hollow annular housing portion in a shape as an alphabet letter “O”; the hollow annular housing portion comprises an air outlet (which is the second airflow outlet) in annular “O” shape and the second chamber of the side airflow system. The “O” shaped second air outlet is located the circular ring of the hollow annular housing portion, the second chamber is majorly located with the hollow annular housing portion (the second chamber also may be extended to the primary filter carrying portion). The air exhausted from the second airflow outlet, which is flowing out from the central the hollow annular housing portion.

Further, a hollow annular housing portion of the side airflow system has a shape looks like an alphabetic letter “O”, just as one described in one of the embodiments; the hollow annular housing portion may also be in other hollow ring (such as oval, square, etc.) from, as long as the second air outlet which exhaust from the second airflow outlet, are from the hollow annular housing portion, it fall into the spirit of this patent.

Further, the second airflow outlet is an outlet having a shape which is gradually narrowing, or it is a nozzle type outlet. The hollow annular housing portion comprises a curved shape portion, having the curvature at the side facing to the hollow circular core. When the second airflow is exhausted from the second air outlet (i.e., the second airflow), it flows out from the void within hollow annular housing portion, a Coanda effect is created at the curved shape portion by exhausting second airflow, the air outside the air purifying device is in traction by those air nearby the hollow annular housing portion, to flows through a central hollow part of the hollow annular housing portion together with the second airflow.

The main airflow system comprises a hollow annular housing portion, it is operated in coordination with the hollow annular housing portion of the second air flow system. The second air outlet surrounds a whole or a partial part of the first air outlet; or the first air outlet surrounds the whole or a partial part of the second air outlet. When the first airflow is exhausted from the first air outlet, it will pass by the central hollow region of the hollow annular portion of the second airflow system.

When the hollow annular housing portion of the side airflow system is engaged to operate with the main airflow system, the hollow annular housing portion (the second air outlet) surrounds a whole or a partial part of the first air outlet. When the first airflow is flow out from the main airflow system, it will pass by the central hollow region of the side airflow system. When the first airflow is exhausted from the first air outlet of the main airflow system, the air located at the second airflow outlet, will be in traction and be exhausted by the first airflow. It will exhaust out from the second chamber through the second air outlet. A negative air pressure region (hereinafter called “negative pressure area”) is produced within the second chamber, the second airflow enters to the second chamber through the second air inlet, and this airflow is being purified by the primary filter. With this design, the second air outlet (the “O” shape air outlet) is evenly located at the circumference of the hollow annular ring, so when the airflow is in traction and be discharged from the second air outlet of the side airflow system by the main airflow, a better and more evenly distributed negative air pressure effect is formed within the second chamber. This negative air pressure effect is extended to the primary filter carrying portion. To meet the need, the primary filter carrying portion is forms by a flexible duct tubing, the position of the second air inlet, can be extended to or shortened, or transferred for a different orientation, according to the air purification needs, or the changes in the concentration of pollutants or sources, reassignment to different orientations is allowable.

Further, a hollow annular housing portion extends to the primary filter carrying portion, where the primary filter is carried within it. The shape of the primary filter is not related to the shape of the annular hollow housing portion, the shape of the primary filter belongs to a standard shaped type filter.

Further, the second air inlet is located within the first chamber, it is further located between the first air inlet and the first air outlet. The second inlet draw in air directly from the first chamber, in this case, the air enters to the second chamber from the first chamber;

Further, the second chamber also comprises at least one air inlet, to draw in the air from the outside of the first chamber directly (hereinafter as “the third air inlet” or the external). In this case, the air enters the second chamber from the external.

If the air purifying device is provided with only the second air inlet, or all of the air entering into the second chamber are all from the first chamber, the primary filter will be located at the second air inlet, or located in between the second air inlet and the second air outlet; all the air flow into the second chamber through the second air inlet air must pass through the primary filter, and be discharged to the second air outlet.

If the air cleaning device is provided with the second air inlet and the third air inlet. Further, the air purifying device comprises a by-pass mechanism for selecting the airflow to be drawn into the second chamber, if it will be all from the second air inlet, or all from the third air inlet, or in partial from the second air inlet and partial from the third air inlet.

Under normal circumstances, if the air come into the first air inlet and the air come into the second chamber are from the same or similar circumstances, the same way as the air go into the second chamber is come from the third air inlet, which both having the similar concentrations or levels of pollutants. The purification effect will not be in big difference as when compared with those air that come from the first chamber. However, if it meet one of the following conditions, whether the air enter to the second chamber is from the first air inlet or it is from the third air inlet will bring distinct different on purification effect, due to the difference sources:

If the air come into the first air inlet and the air come into the second chamber are from different environments, the same way as the air drawn into the second chamber is coming from the third air inlet. For example, the air drawn into the first air inlet is cleaned or purified air, while the air being drawn into the second chamber contains higher concentrations of pollutant. The purification effect on the air which entering into the second chamber from the third air inlet, will be relatively more obvious in comparing to the purification effect on the air which entering into the second chamber from the first chamber. This is because if the air entering into the second chamber came from the third air inlet, which has higher concentrations of pollutants, the purification effect by the primary filter will be more significant.

When the air enters to the first air inlet and the air enters to the second chamber are from the same or similar circumstances, it gives similar purification effect on if the air is drawn from the first air chamber or the third air inlet. However, under some special circumstances of the application of “air enters into the second chamber from the first chamber”, for example, when the fan blower of the main airflow system is placed upstream of the second air inlet, “air enters into the second chamber from the first chamber” will save more energy on motor power consumption than “air enters to the second chamber through the third air inlet”. This is because, “the air enters into the second chamber from the first chamber” having a structure that the second air inlet is placed within the first chamber, thus the air is pumped into from first chamber directly, the mechanism of the action that “air is pumped into” helping the operation of the fan motor, and reduced the loading of the motor. In opposite, if the fan blower of the first airflow system is placed downstream of the second air inlet, “air enters into the second chamber from the first chamber” cannot help to save the power consumption by the fan motor, it will also possibly increase the power consumption of the motor.

Thus, if there is a by-pass mechanism in the side airflow system, for selecting the airflow to be drawn into the second chamber, if it will be all from the second air inlet, or all from the third air inlet, or in partial from the second air inlet and partial from the third air inlet. The structure of the entire air purifying device can be appropriately and flexibly adjusted, based on the concentration of the pollutants of the air which entering into the first air inlet and entering into the second chamber.

If the air to drawn into the second chamber must all from the second air inlet (i.e., all of the air into the second chamber are from the first chamber), then the air from the third air inlet will be stopped, the third air inlet is being blocked or covered. In reverse, if the air drawn into the second chamber must all from the third air inlet (i.e., all of the air into the second chamber are from the outside environment of the first chamber), then the air from the second air inlet will be stopped, the second air inlet is being blocked or covered.

If the air cleaning device is provided with a second air inlet and a third air inlet, the primary filter will be placed at on at least one of the following positions: (1) the primary filter is located in between the second air inlet, the third air inlet and the second air outlet; or (2) of the air purifying device have at least two primary filter, the primary filters are located at the second air inlet and at the third air inlet, so that all incoming effluent (i.e., the airflow discharged from the second air outlet) must go through the primary filters.

Further, the primary filter is located at the second air inlet, and/or located at the third air inlet, a partial or the whole part of the primary filter form the second chamber, that is, the second chamber is composed by a partial of the whole part of the primary filter; the air inlet side of the primary filter will be according to where the airflow coming from, whether it is from the first chamber or from the outside of the first chamber, be defined as the second air inlet or third air inlet. The support of the primary filtering materials formed a shape as an air outlet, and that will be regarded as the second air outlet.

Further, the air purifying device comprises control device, the control device might be operated with a manual control, or by a central processor, to control the bypass mechanism, which to select whether the whole or partial of the second air inlet or third air inlet will be covered or block. If the second air inlet is completely covered, when the second chamber became a negative pressure region, the second airflow will be the air drawn from the outside of the first chamber, they are the air being drawn in from the third air inlet, and pass through the primary filter, it is then betowed and be discharged by the first airflow, exhaust from the second air outlet, and merged with the first airflow, and exhaust from the first air outlet. If the third air inlet is completely covered, when the second chamber became a negative pressure region, the second airflow will be the air drawn from the first chamber, they are the air being drawn in from the second air inlet, and pass through the primary filter, it is then be towed and be discharged by the first airflow, exhaust from the second air outlet, and merged with the first airflow, and exhaust from the first air outlet.

Further, the first outlet is a gradually narrowing shaped-type outlet, or a nozzle-type outlet Although the second outlet is not necessarily be a gradually narrowing shaped-type outlet, narrowing air outlet can increase the effect of the negative air pressure that happen in the second chamber.

In some embodiments, the first outlet and the second outlet are gradually narrowing shaped-type outlets respectively.

A whole or partial of the second chamber is placed within the first chamber.

Further, the first outlet is an outlet that gives a venturi effect. When the first airflow from the first outlet is flowing at high-speed, a low pressure region will be created nearby the first air outlet, an adsorption effect is create, the adsorption effect let second airflow be in traction to flow out from the second chamber. The second airflow is discharged together with the first airflow. The operation principle of the air purifying device is the same as the principle of the venturi effect: when the first airflow is exhausted out from the gradually narrowing first air outlet, at the narrowest point, the dynamic pressure (velocity head) reached to a maximum value and the static pressure (resting pressure) reached to minimum value. Due to the change on the cross-section of the first airflow, the speed of it is increase. As the entire airflow is experiencing a process of passing through a narrowed first air outlet, the static pressure is reduced at the same time. Thereby a pressure difference is generated, this pressure offers an external suction force for the side airflow, so the second chamber of negative air pressure is produced.

Further, the hollow annular housing portion of the main airflow system and the side airflow system comprise curved shape portions, having the curvature at the side facing to the hollow circular core. When the air is exhausted from the first air inlet and/or second air outlet, it flows on the surface of the curved shape portion. The exhausted air will be adhered to flow on the curved shape surface.

Further, some part of the housing of the side airflow system comprise a curved shape portion, this can lead to a result that when the air is exhausted from the first air inlet and/or second air outlet (includes the air being exhausted from the first air inlet and the cleaned air being exhausted from the second air outlet), a Coanda effect is created at the curved shape portion. That is, when the air is exhausted from the first air outlet and/or the second air outlet, it will also pass by the curved shape surface. As the exhaust air comprises the curved flow line, the external air pressure is therefore higher than that of the exhausted airflow, at the interface where between the inner part and curved surface of the exhausted airflow. The exhausted air is adhered on the curved surface to flow on. Having flown out from the first air outlet and/or the second air outlet with a Coanda effect being created, it brings certain advantages to the entire air purifying device. The Coanda effect let the surrounding air, which are the air around the first air outlet and/or the air around the second air outlet (this is the air nearby the first air outlet and/or the second air outlet, hereinafter “the surrounding air”, but not those air which is exhausted from the first air outlet and the second air outlet) be in traction and flow together the exhausting air (the air being exhausted from the first air outlet and the second air outlet) of the purifying device. Compare with the air purifying device without the Coanda effect, the one with Coanda effect will have better air ventilation. Better air ventilation greatly enhances the bi-directional and multi-directional on air convection in the environment during the air purification process. The bi-direction and multi-directional air convection enhancement is a three-dimensional air movement which cannot be achieved by just a fan, as it assist to well mix the non-evenly distributed levels of pollutants in the environment. The cleaned air will not be just stayed or accumulated in around the air purifying device, but by the bi-directional and multi-directional air convection, being transferred to more distance location from the air purifying device. The higher level pollutants, which are located rather apart from air purifying device, will not be passively and slowly, by gradual diffusion, being brought to the air purifying device, it is actively being brought to the air purifying device nearby by the bi-directional and multi-directional, and then be purified.

Further, the housing of the first air outlet comprises a curved shape portion at it housing, when the cleaned air is exhausted from the first air outlet, a Coanda effect will be generated. That mean when the purified air is discharged from the first air inlet, it flow on the surface of the curved shape portion, as the exhausted air will be adhere to flow on the curved shape surface. As the exhaust air comprises the curved flow line, the external air pressure (i.e., the atmospheric pressure) is therefore higher than that of the exhausted airflow, at the interface where between the inner part and curved surface of the exhausted airflow. The exhausted air is adhered on the curved surface to flow on.

Further, the air purifying device employs some controlling device (example: a hinge, motor or the shutter switch), to control the amount, velocity, and sources of the first air flow to pass through the primary filter, i.e., whether the air entering into the second chamber shall came from the outside or inside of the first chamber, whether the second air flow is drawn in from the second air inlet or the third air inlet.

Further, the orientation of the air inlet side of the primary filter is preferably deviated away from the flow direction of the first air flow, so that to avoid the direct blowing or hitting the air of the first airflow on the air inlet side of the primary filter, to avoid the airflow be affected by the static pressure of the primary filter, which will increase the loading of the fan blower. When the negative air pressure region is created within the second chamber, the second airflow will be draw to enter the air inlet side of the primary filter, the second airflow will enter to the second chamber through the primary filter.

Further, the air inlet side of the primary filter, forming an acute angle (i.e., less than 90 degrees) relationship relative to the direction of the first airflow. Further, the orientation of the air inlet side of the primary filter is arranged in parallel with the direction of flow of the first airflow.

Furthermore, the air purifying device further comprises a divider, the divider is placed within the first chamber, and it is placed at the downstream position of the first air inlet and at the upstream position of the second air inlet, the divider substantially separating the first airflow outlet and the second air inlet. The divider split the air into at least two portions, wherein at least one portion of the air (i.e. the first airflow), without passing through the second air inlet, and access to the first air outlet. This can prevent the first airflow, when flow to the second air inlet would be drawn into the second chamber by the reason of the negative air pressure region is being created in the second chamber, which would other reduce the first airflow amount and velocity.

Further, the housing part of the second chamber form the divider; the second chamber shapes and orientations housing having the function as the divider, which substantially separates the first air outlet and the second air inlet.

The air purifying device further comprises a flow deflector, the flow deflector is placed in the first chamber, when airflow is drawn to flow from the upstream to downstream, and the flow deflector guides the airflow to the direction of the first air outlet. The flow deflector make the airflow to become laminar flow, the direction of the flow is focus to the first air outlet.

If the first air outlet is located at one side of the first chamber, the flow deflector may be a planar baffle, or a group of the baffle planes, or a honeycomb shaped deflector. It is tilted within to the first chamber, and guides the airflow to the direction of the first air outlet, which is located at one side of the first chamber.

Further, the guide is a set of planer baffle, or a honeycomb shaped deflector, the channels for the air to flow through is the channels in gradually narrowing shaped channel.

Further, the dust collector of the high-voltage electrostatic precipitator is being employed as the flow deflector, when the flow deflector for guiding the air at the same time, the flow deflector will play the role of air purification. The particulates pollutants in air will be separated and be adsorbed.

At a position which is downstream of the first air outlet, and upstream of the second air outlet, further comprises a pre-filter.

Further, the pre-filter is preferably to be a filter of lower static pressure, such as high-voltage electrostatic precipitator, a preliminary dust filtration filter. At a face velocity of the airflow is 5.33 cm/s, it is an airflow resistance of the filter is 120 Pa or less; or at a face velocity of the airflow is 5.33 cm/s, it is an airflow resistance of the filter is 40 Pa or less; At a face velocity of the airflow is 5.33 cm/s, it is an airflow resistance of the filter is 25 Pa or less; At a face velocity of the airflow is 5.33 cm/s, it is an airflow resistance of the filter is 17 Pa or less.

The primary filter being employed will be at least any one of the a high-voltage electrostatic precipitator, negative ion generator, ozone generator, an oxidant generator, a filter which comprises activated carbon, photocatalytic material, or molecular sieve, zeolite materials which mixing one or more than one of type of materials in any proportion and shape. Furthermore, the primary filter is a set of filters that comprises with different functions.

Further, the first outlet and/or the second outlet also includes a movable block, by adjusting the angle and orientation activities of the movable blocks to regulate the operation the sizes, angles and orientations of the first air outlet and/or of the second air outlet, thereby further regulate the velocity of the first airflow. The increment of the first airflow can increase the different of air pressure between the first chamber and the second chamber, which eventually increase the negative air pressure value of the second chamber (the negative air pressure region), more air will then entering to the second air chamber for purification. Further, this method is employed to regulate the velocity of airflow entering into the primary filter.

The air purifying device further comprises the central processing unit.

Wherein an air purifying device further comprises one or more environmental sensors, environmental sensors is used to measure at least of the: temperature, relative humidity, volatile organic compounds formaldehyde, carbon dioxide, carbon monoxide, dust, ozone, nitrogen oxides, bacteria, radon, wind speed, air flow, pressure, ambient light, noise level.

All regulation when done by electronic control automatically, the judgment to regulate will be according to data obtained by the environmental sensor data, or through the computer program which is being embedded in the central processor beforehand.

Further, the air purifying device further employs the connection with a motor or a hinge, with a shutter to switch and to cover a whole or major part of the filter, thereby to control the amount and flow rate of the second airflow to go into the primary filter.

Further, the shutter and the primary filter are combined to form a same part (hereinafter referred to as “filter valve”). Opening or closing the filter valve control the airflow path of the air.

All in all, the air purifying device comprise:

At least one first chamber, the first chamber comprises at least one air inlet (hereinafter referred to as “the first air inlet”) and at least one air outlet (hereinafter referred to as “the first air outlet”), the first air outlet is located in the any location downstream of said first chamber; and at least one second chamber, the second chamber includes at least one air inlet (hereinafter referred to as “the second air inlet”) and said at least one air outlet (hereinafter referred to as the “the second outlet”), the second air inlet is disposed within the first chamber inside, and it is located between the first air inlet and the first outlet, the second air inlet directly draw the air from the first chamber; the second air outlet disposed adjacent to the first air outlet or slightly upstream, of a position abutting to the first air outlet; and at least one filter (hereinafter referred to as “the primary filter)”; the primary filter is placed within the second chamber, and purify all the air enters to the second chamber.

When the air within the air purifying device is driven from upstream to downstream position, the flow of the air stream (called “first airflow”) enter into the first chamber from the first air inlet, and then discharged from the first air outlet. When the first airflow discharged from the first air outlet, the air outlet adjacent to the first air outlet, or at air at the position which is slightly upfront (slightly upstream) abutting to the first air outlet, i.e., the air around the second air outlet, is in traction by and be discharged with the first airflow, a negative air pressure region (hereinafter called “negative pressure area”) is produced within the second chamber, the second airflow enters to the second chamber through the second air inlet, and this airflow is being purified by the primary filter.

The second chamber is also provided with at least one air inlet to draw in air directly from the outside of the first chamber (hereinafter referred to as “the third air inlet”).

The air purifying device also comprise a by-pass mechanism for selecting the airflow to be drawn into the second chamber, if it will be all from the second air inlet, or all from the third air inlet, or in partial from the second air inlet and partial from the third air inlet.

The primary filter is located in at least one of the following positions: (1) the primary filter is located between the second air outlet with the second air inlet, and with the third into the air inlet, or (2) the air purifying device comprises at least two primary filters, the at least two primary filters are located at the second air inlet and at the third air inlet, all air incoming to and flowing out from second chamber (i.e. air discharged from the second air outlet) must go through the primary filter.

A partial of or the whole part of the primary filter further forming the second chamber, the air inlet side of the primary filter will be according to source of the airflow (from the first chamber or from the outside of the first chamber), be defined as the second air inlet or third air inlet. The support of the primary filtering materials formed a shape as an air outlet, and that will be regarded as the second air outlet.

The first outlet and the second outlet are a shaped as a gradually narrowing air outlet.

A partial portion of the housing outside of the first air outlet having a curve-shaped flowing line surface. When the airflow is exhausted from the first air outlet, the exhausted airflow passes by the curve-shaped flowing line surface, it will be attached to the wall of it while flowing. The pressure outside of the exhausted airflow (the atmospheric pressure) is higher in compared to the pressure at the within the airflow and the pressure of the airflow at the junction with the curve-shaped flowing line surface.

The air purifying device further comprises a flow deflector, the deflector is placed in the first chamber, when airflow is drawn to flow from the upstream to downstream, and the flow deflector guides the airflow to the direction of the first air outlet.

The flow deflector employs the high-voltage electrostatic precipitator having a function for dust removal to spate and adsorb the particulate pollutant from the first airflow.

At downstream position of the first air inlet, and upstream position of the second air inlet, a pre-filter is further comprised.

Or a nutshell, the air purifying device comprises:

At least one primary airflow system and at least one side airflow system;

The main airflow system comprises at least one first air inlet and at least one first air outlet, one first chamber located in the space between the first air inlet and the first air outlet, at least one fan blower to drive a first airflow flowing from the upstream position to the downstream position within the first chamber, from the first air inlet to the first air outlet, and be exhausted out from the first air outlet.

The side airflow system comprises at least one housing, at least one primary filter, at least one second air inlet, at least one second air outlet, and at least one second chamber, the primary filter is located within the housing, the second air inlet being located at the most upstream of the housing, the second outlet located at the most downstream position of the housing. The primary filter is located at downstream position of the second air inlet. The void between the primary filter and the second air outlet is an enclosed room.

The second air outlet of the side airflow system is located adjacent to the first air outlet of the main airflow system, or slightly forward (slightly upstream) to the abutting position of the first air outlet.

The primary filter purify all air enter to the second chamber of the side airflow system, through the second air inlet.

When the air (first airflow) within the air purifying device is driven to flow from the upstream to the downstream, it flow from the first air inlet to the first chamber, and then be discharged from the first air outlet directly. When the first airflow is exhausted from the first air outlet, the air at the position which is adjacent to, or the air at the position which is slightly upfront (slightly upstream) abutting to the first air outlet, i.e., the air around the second air outlet, is in traction by and be discharged with the first airflow, a negative air pressure region is produced within the second chamber, the second airflow enters to the second chamber through the second air inlet, and this airflow is being purified by the primary filter.

The second airflow which being in traction by the first airflow and exhausted from second air outlet combined with the first airflow and be exhausted from the first air outlet.

The first airflow is discharged from the first air outlet of the electrical device. The air inlet of the electrical device is defined as the first air inlet; the air outlet of the electrical device is defined as the first air outlet; the air exhausted from the first air outlet is defined as the “main airflow” (i.e. the first airflow). The main airflow system is the electrical device comprise with a fan blower, the location of its first air outlet is located at a position which is adjacent to the second air outlet of the side airflow system. Further, the first air outlet in a position slightly upfront (slightly upstream) of the second outlet.

When the first airflow is discharged from the first air outlet of the electrical device, the air at the second air outlet also is in traction by the exhausting airflow, from the second air chamber, it will be exhausted out through the second air outlet. The second chamber becomes a negative air pressure region, the air with pollutant enter into the second chamber through the second air inlet, on passing through the primary filter, the second airflow is purified by the primary filter.

Further, the first outlet is in a shape which is as a gradually narrowing outlet,

When the main airflow system is an electrical device Further, when the electrical device is engaged with the side airflow system, the main airflow system further comprises at least one main airflow concentrator, which is a main stream concentrator is a device to collect and focus the first airflow. When the first airflow is discharged from the electrical device, it will first enters to the main stream concentrator, the main airflow concentration then converts and reorganize of the first airflow to a high-speed first airflow. The main stream concentrator comprises an air outlet which is in a shape of gradually narrowing.

Further, the side airflow system further comprises a hollow annular housing portion (circular ring form), and it is extended to the primary filter carrying portion. The air exhausted from the second airflow outlet, which is flowing out from the central the hollow annular housing portion. The hollow annular housing portion in a shape as an alphabet letter “O”; the hollow annular housing portion comprises an air outlet (which is the second airflow outlet) in annular “O” shape and the second chamber of the side airflow system. The “O” shaped second air outlet is located the circular ring of the hollow annular housing portion, the second chamber is majorly located with the hollow annular housing portion.

When the hollow annular housing portion of the side airflow system is engaged to operate with the main airflow system, the hollow annular housing portion (the second air outlet) surrounds a whole or a partial part of the first air outlet. When the first airflow is flow out from the main airflow system, it will pass by the central hollow region of the side airflow system. When the second airflow from the second air outlet is in traction and be exhausted by the first airflow, a better and more evenly distributed negative air pressure effect is formed within the second chamber. This negative air pressure effect is extended to the primary filter carrying portion. The second air flow enters from the second air inlet, pass through the primary filter, and be cleaned by the primary filter.

With the further integration onFIGS. 10 and 11, the above embodiment is described with some exemplary explanations. Referring toFIG. 10, the air purifying device comprises a filter (hereinafter referred to as “the primary filter)”1, a first chamber2, the first air inlet21, a first air outlet22; a second chamber3, a second air inlet31, a second air outlet32, the primary filter1which is placed within the second chamber2, the primary filter1is located at the second air inlet, and/or is located in between the second air outlet32with the second air inlet31; all air which pass through the second air outlet31have to first pass through the primary filter1, and be discharged from the second outlet32; the second air inlet31is located within first chamber2, and located between the first air inlet21of the first air outlet22; said second outlet32is located adjacent to or slightly upfront (upstream), the abutting position at the first outlet22.

The first outlet22and the second outlet32are respectively gradually narrowing shape air outlets.

Further, the first outlet22is an outlet that gives a venturi effect.

When the air within the air purifying device is driven to flow from upstream to downstream, the first airflow51flow to the first chamber2from the first air inlet21, and then be discharged from the first outlet22; when the first airflow51is being discharged from the first outlet22, the air nearby the first outlet22or nearby the location which is adjacent to or slightly upfront to it, i.e., the air at the second air outlet32, be in traction by the discharging first airflow51, the second chamber3generates a negative air pressure region (hereinafter referred to as “the negative air pressure region”), resulting in a second air flow52, the second airflow52flow from the first chamber2into the second air inlet31, and therefore it flows through the primary filter1, and the be discharged together by in traction with the primary airflow51flow, from the second outlet32it combined with the first air flow51, flows out of from the first air outlet22.

Referring toFIG. 11, the second chamber3also comprises at least one air inlet which can draw in air directly from the outside of the first chamber2(hereinafter named “the third air inlet”)33.

The primary filter1is placed in between the second air inlet31and the third air inlet33with the second air outlet32; all air that enter to the second chamber3through the second air inlet31, and/or the third air inlet33will pass through the primary filter1, then being discharged from the second air outlet32.

Further, the air purifying device further comprises a divider61, the divider61substantially separate the first air outlet22and the second air outlet31. The divider61is split the airflow into at least two portions61a,61b, wherein a portion of the air (i.e. the first airflow)61a, without passing through the second air inlet31, and the only access to the first air outlet21. This can prevent the first airflow, when flow to the second air inlet31would be drawn into the second chamber2by the reason of the negative air pressure region is being created in the second chamber2, which would other reduce the first airflow amount and velocity. The housing portion of the second chamber2forms the divider61. At a downstream position of the first air inlet21and the upstream position of the second air inlet31, further comprise a pre-filter7.

There are more implementation methods for the present invention, with the freely re-structure, the primary filter, the first and the second air inlets and outlets of the first and the second chamber, the position of the pre-filter, etc., as long as when the air in is flow the within the air purifying device, which is driven by the flow from upstream to downstream, the first airflow flowing from the first air inlet into the first chamber, then be discharged directly from the first outlet; the first air flow when being discharged, making the air nearby the first outlet or nearby the location which is adjacent to or slightly upfront to it, i.e., the air at the second air outlet, be in traction by the discharging first airflow, generates a negative air pressure region in the second chamber, resulting in a second air flow52from any air inlet flow into the second chamber, and being purified by the primary filter, will fall into the scope of spirit of this invention.

As can be seen by the above description, the first chamber in the examples 10 and 11 can be understood as the space within the first airflow duct as described for the example 1 to 9, the second chamber in the examples 10 and 11 can be understood as the space within the second airflow duct as described for the example 1-9. As the second air outlet of the second chamber is disposed within the first chamber, the airflow in the main airflow system being regarded as the first airflow, the airflow in the side airflow system being regarded as the second airflow. The merging airflow of the first airflow and the second airflow will be regarded as the third airflow. The channel for this merged and discharged airflow can be regarded as the space in the common airflow duct as described for the example 1 to 9. The first air outlet can be regarded as the common airflow outlet.

The following are some further integration inFIG. 12andFIG. 11, describing the above-described variant embodiments with exemplary explained.

Referring toFIG. 12, the air purifying device comprises a main airflow system100, a side airflow system200.

The main airflow system100includes at least one first air inlet1001and at least one first outlet1002, the main airflow system100further comprise a first chamber1003which is located between the first air inlet1001and the first air outlet1003, the first air outlet1001is located anywhere downstream of the first chamber1003, at least one fan blower1014drive the first airflow, within the first chamber1003, flowing from the upstream to the downstream, from the first air inlet1001to the first air outlet1002, and be discharged at the first air outlet1002.

The side airflow system200comprise at least one housing2005and at least one primary filter2004, at least one second air inlet2001and at least one second air outlet2002, at least one second chamber2003; the primary filter2004is disposed within the housing2005of the side airflow system200, the second air inlet2001located at the most upstream position of the housing2005, the second outlet2002located at the most downstream position of the housing2005. The primary filter2004is at the downstream position the second air inlet2002, the second chamber2003is positioned between the second air outlet2002and the primary filter2004;

The second air outlet2002of the side airflow system200is placed at the adjacent position, or a position slightly upfront (slightly upstream) of the first air outlet1002of the main airflow system100.

The primary filter2004purifies all air enter through the second air inlet2001to the second chamber2003.

When the air (first air flow)1008of the main airflow system100being driven by the fan blower1014to flow from the upstream to the downstream position, the first airflow1008flow from the first air inlet1001into the first chamber1003, and then be discharged directly from the first air outlet1002. When the first airflow1008is discharged from the first outlet1002, the air at the position which is adjacent to, or the air at the position which is slightly upfront (slightly upstream) abutting to the first air outlet1002, i.e., the air around the second air outlet2002, also be regarded as the second airflow2008, is in traction by and be discharged with the first airflow1008, a negative air pressure region is produced within the second chamber2003, the second airflow enters to the second chamber2003through the second air inlet2001, and this airflow is being purified by the primary filter2004

The first air outlet1002is a gradually narrowing shaped outlet.

Referring toFIG. 13, another specific embodiment of the present invention, its basic structure same with the embodiment described inFIG. 12, except that structure of the second chamber2003of the side airflow system is made from the a primary filter2004, i.e. a second chamber2003of the side airflow system200is form from the primary filter2004; the air inlet side of the primary filter2004, is defined as a second air inlet2001. The support of the primary filter2004materials formed the second chamber2003and also constitute as the shape as an air outlet, and that will be regarded as the second air outlet2002.

In the embodiment shown inFIGS. 14 to 16, the air purifying device comprises a main airflow system210and the side airflow system220. Main airflow system210includes a first housing212and main airflow concentrator213. The outlet2132of the main airflow concentrator213is also the first air outlet210of the main airflow system210. Main airflow concentrator213is placed within the first housing212, at where close to the second outlet2244, the main airflow concentrator213is gradually narrowing. The airflow from the first air outlet is converted and rectify by the main airflow concentrator213to a high-speed airflow. This enhanced the negative pressure at the first air outlet. Interior space of the first housing212to form the first chamber2123, the first chamber2123is located between the first air inlet2122and the first air outlet. In another embodiment, the main airflow concentrator213maybe omitted, modifying the housing portion nearby of first air outlet to gradually narrowing type, can also achieve the purpose of converted and rectify the air from the first air outlet to a high-speed airflow.

The outside of the first air inlet2122is connected to an air movement devices, the air movement device2122drives the air to flow from the first air inlet to the first air outlet. If the outside of the first air inlet2122is connected to an air movement device, the main airflow system210which being shown inFIG. 14can be omitted. The air movement devices may be electrical device having a fan, such as electric fans, dehumidifiers, humidifiers, air cooling device, air conditioners, heaters and the alike. The air movement device may be an air purifier. After the installation of the air purifying device of this embodiment, the air purifying effect by the original air purifier will be enhanced.

In the embodiment shown inFIG. 14, the second air outlet2244and the main airflow concentrator2244form a final air outlet.

Side airflow system220surrounds the outer part of the main airflow system210. The side airflow system220comprises a primary filter222and the second housing224. The primary filter222is secured between the first housing224and second housing212, a first housing212, second housing224and the filter222forms a second chamber2243. See alsoFIG. 15andFIG. 16, the primary filter222is in annular form. The primary filter222, the second housing224and the first housing212form a square shape. An opening is made at the second housing224to produce a second air outlet2244; the second air outlet2244is near to the first air outlet2132; the second air outlet2244is located adjacent to the first air outlet2132, a second air outlet2244an also be located slightly upstream to a location adjacent to the first air outlet adjacent location2132; the second air outlet2244would also surround the first air outlet2132. When the air is discharged from the first air outlet2132, the air at the second air outlet2244is pulled to flow and a venturi effect is occurred. A negative air pressure is generated in the second chamber2243. The air out side of the primary filter222is oriented so it is facing toward the second air outlet2244, and air is flown out of the side airflow system. As the negative air pressure is created within second chamber2243. The air is drawn to flow into the side airflow system220from the second air inlet2242through the primary filter222, and be discharged from the second air outlet2244. The primary filter222cleans the air which enters to the side airflow system220.

FIG. 17shows a side airflow system of an air purifying device in another embodiment of the present invention. The side airflow system200comprise a hollow annular housing portion2100, and extending to primary filter carrying portion2200, extending bearing part of the filter housing2200can also meet the need, the use of the flexible tube made of laryngeal structure. To meet the need, the primary filter carrying portion is forms by a flexible duct tubing, the hollow annular housing portion2100in a shape as an alphabet letter “O”; the hollow annular housing portion comprises an air outlet2002(which is the second airflow outlet) in annular “O” shape and the second chamber2003of the side airflow system. The “O” shaped second air outlet2002is located the circular ring of the hollow annular housing portion2100, the second chamber2003is located within the hollow annular housing portion and the primary filter carrying portion2200. The air exhausted from the second airflow outlet2002, which is flowing out from the central2009the hollow annular housing portion.

Referring toFIG. 18, which the structure of it is basically the same as that shown in theFIG. 17. Only the side view of the side airflow system of an air purifying device of one embodiment is illustrated. The second air outlet2002is having a shape which is gradually narrowing, or it is a nozzle type air outlet. The hollow annular housing portion2100, comprises a curved shape portion, having the curvature at the side facing to the hollow circular core. When the second airflow2008is exhausted from the second air outlet2002, it flows out from the void2009within hollow annular housing portion, a Coanda effect is created, the air outside the air purifying device, i.e., the air3008nearby the hollow annular housing portion will follow the second air flow, multiple the second airflow. This will result that the second airflow2008, the primary airflow1008, and the air3008outside the air purifying device (the air nearby the hollow annular housing portion) to flows through a central hollow part2009of the hollow annular housing portion together.

A hollow annular housing portion2200extends to primary filter carrying portion2004. The primary filter is located at the primary filter carrying portion2004. The shape of the primary filter has not relationship with the hollow annular housing portion2200. The shape of the primary filter2004is a standard shaped filter.

ReferringFIG. 19, which the side airflow system200shown is structurally the same as that shown in theFIG. 18. The main airflow system100further comprises a main airflow concentrator4001. When joining the main airflow concentrator4001with an electrical device500, the main airflow concentrator4001collect and focus the first airflow means1008. When the first airflow1008is discharged from the electrical device500, it will first enter to the main stream concentrator4001, the main airflow concentrator10084001convert and rectify the first airflow, it transforms the first airflow into a high-speed flow1008a. The outlet of the main airflow concentrator4001is shaped as gradually narrowed first outlet1002.

ReferringFIG. 20, which the side airflow system200shown is structurally the same as that shown in theFIGS. 18 and 19, except that the specific embodiment illustrates fitting together with a main airflow system100. A partial or whole part of the first airflow outlet1002of main airflow system100embedded (or surround) the hollow annular housing portion2009(or the second air outlet2002) of the side airflow system200. When the first airflow1008is flow out from the main airflow system100, it will pass by the central hollow region2009of the side airflow system. When the first airflow1008is exhausted from the first air outlet1002of the main airflow system100, the air located at the second airflow outlet2002, will be in traction and be exhausted by the first airflow1008. It will exhaust out from the second chamber2003through the second air outlet2002. A negative air pressure region is produced within the second chamber2003, the second airflow2008with pollutants enters to the second chamber2003through the second air inlet2001, and the second airflow2008is being purified by the primary filter2004.

With this design, the second air outlet (the “0” shape air outlet) is evenly located at the circumference of hollow annular housing portion2009. Therefore, when the airflow is in traction and be discharged from the second air outlet2002of the side airflow system2008by the main airflow1008, a better and more evenly distributed negative air pressure effect is formed within the second chamber2003. This negative air pressure effect is extended to the primary filter carrying portion2200. The side airflow2008is then effectively enter to the second air inlet2001, and pass through the primary filter2004, and be cleaned by the primary filter2004.

In one embodiment, as shown in theFIG. 21, the position of the main airflow system and the side airflow system is different from that shown in theFIG. 20. In this embodiment, the hollow annular housing portion of the second air outlet2002of the side airflow system220embedded (or surround) of the first air outlet1002of the first airflow system210.

The main air flow system210comprises a first housing612, a first air inlet structure614and a fan blower616. The first housing612comprises an annular hollow housing portion, the interior space of that portion of the first housing612is an annular cavity, and the cavity is in circle shaped. The first housing612comprises a first sidewall6124and a second sidewall6126which are opposite to each other. The first sidewall6124and the second sidewall6126are curving gradually toward each other, they are getting close at one end. The second sidewall6126is located close to the annular hollow housing portion of the first housing612. The first air inlet1001is located on the first inlet structure614, a first air outlet1002is at the slit which is formed between the first sidewall6124and the second sidewall. The first air outlet1002is a gradually narrowed shaped outlet. It is a nozzle type air outlet. The air inlet1001is located at one terminal of the first inlet structure614. The fan blower616is located at the first air inlet1001or somewhere within the first air inlet structure614.

The annular hollow housing portion of the first housing612is in a shape of the letters “O”. The first outlet1002also in the shape of the letters “O” word. The first air outlet1002is located at the annular hollow housing portion2009of the first housing612. The inner cavity of first air inlet structure614connects to the inner cavity of the first housing612and the inner cavity of the fan blower616. A first inlet structure614may be any shape, and a first inlet structure614may be in any form to extend to the first housing612, the shape of the first housing612of the fan blower616have not limiting specifications.

Side airflow system220includes a second housing622, a second inlet structure624and a primary filter626. The second housing622comprises an annular hollow ring. The first housing612and the second housing622are juxtaposed. The second inlet structure624is internally connected to the second housing622and the primary filter626. The second outlet2002is located on the second housing622. The second outlet2002is gradually narrowing shaped outlet. The second outlet embedded or surrounded a partial or the whole part of the first air outlet1002. The second outlet2002is located near to the first outlet1002.

The fan blower616drives the air to flow to and be discharged from the first air outlet1002from within the first housing612. The air at the second air outlet2002be towed by the exhausting air at the first air outlet1002, from the second casing622, it is discharged from the second air outlet2002. A negative air pressure region is created, the air to be purified being sucked through the primary filter626, the purified air pass through the second inlet structure624, the second housing622and be exhausted through the second air outlet2002.

The first housing612where it is adjacent to the second air outlet2002612, it is a smooth surface. When the air is discharged from the first air outlet1002and a second air outlet2002, the exhausting air will drive the air which is nearby the air purifying device, to flow together on the smooth surface. The air flow out from the first air outlet1002and the second air outlet2002, which is around the central of the annular hollow portion2009when it is being exhausted, will creates a Coanda effect. This will pull the air outside air purifying device, namely, the air nearby the first housing612, together with the air exhausted from the first air outlet1002and the second air outlet2002to flow together. This will increases the amount of the airflow. The air exhausted from the first air outlet1002and the second air outlet2002, and the air nearby the air purifying device (near the annular hollow portion first housing612) will flow through together that central hollow parts.

Seeing theFIGS. 22 and 23in one embodiment where two side airflow systems is put together, a first sidewall of one side airflow system220is coincide with the second sidewall of the juxtaposed adjacent side airflow system220a. In other embodiment, a plurality of parallel side air flow system220may also be provided. In such case, the first sidewall of one side airflow system220is coincide with the second sidewall of the juxtaposed adjacent side airflow system220, or the second sidewall of one side airflow system220is coincide with the first sidewall of the juxtaposed adjacent side airflow system220.

At different side airflow system220, filter2004with different purification function, different purification categories and for treating different concentrations of pollutants may be employed. The air passes through the filter2004of different side air flow system220may be come from different sources of gas. The position of the air inlet of the side airflow system220defined the region of air that can pass through the filter2004, a targeted air purification can then be carried out. The locations of air inlet of the side airflow systems220, can be flexibly adjusted manually or electrical, according to the site environment per air purification needs, or concentration of pollutants or sources. In one embodiment, the housing portion of the primary filter carrying portion2200can adopt to be curved, with flexible materials and structures as needed. The housing portion of the primary filter carrying portion2200may be a tubular housing, the primary filter carrying portion2200can be extended or shortened. It can also be moved with flexibility.

As shown inFIG. 23, the first outlet1002surrounded a plurality of second air outlet2002a,2002b. The main airflow system110can simultaneously drive a plurality of side airflow system220. In this embodiment, the main airflow system110and the plurality of side airflow system220are juxtaposed, and the main airflow system210is located at one end. In other embodiments, the main airflow system110may be sandwiched in between a plurality of side airflow systems220.

As a further improvement of the present invention, in an air purifying device comprises an ion generator, for example, as shown inFIG. 3,FIG. 6andFIG. 8a. The ion releasing tip of the ion generator will is placed non-uniformly in the path of the airflow, that makes only a partial portion of the airflow contains ionized air and/or containing the charged particulates, but not the whole portion of airflow become ionized air and/or containing the charged particulates The followingFIGS. 24 to 28below describes the further improvements.

Refer to theFIG. 24, the air purifying device comprises a fan blower300, an ion generator200, an air mixing space400and an air purifying component500. In this embodiment, the air purifying component500is a filter500. The air purifying device is comprises an air outlet102, an air inlet10, a fan blower300, wherein the fan blower300comprises a fan air outlet302and an air inlet301. The fan inlet301draws in air which containing particulates. It is the air which is to be purified by the filter801. The fan outlet302out the air that containing particulates. It is the air to be purified by the air filter802. The fan blows the air from the upstream position to the downstream; the ion generator200comprises an electronic means201and an ion releasing tip202; the filter500includes a filtering materials and a filtering frame. While purifying the air with the filter500, the micro filter captures the particulates pollutants in the air. One end of the air mixing space400where the air is to be blown away, through the filter500, this end is connected to the air outlet101of the air purifying device. Another end of the air mixing space400where the air to be blow, it is through the fan blower300, this end is connected to the air inlet101of the air purifying device. The air inlet of the fan301is also equipped with a pre-filter (pre-filter) for filter the bigger size dust particulates, and avoid the large size dust particulates pollutes or damages the fan blower.

Air purifying device shown inFIG. 25is structurally same to that shown in theFIG. 24, except that the filter frame is a metal frame501.

Air purifying device shown inFIG. 25is structurally same to that shown in theFIG. 24, except at a position slightly before the filter, installed with at least one metal ventilation grid or an electrical conductive frame600, the electrical conducting frame600is connected to the ground wire of the electronic means201of the ion generator.

The embodiment shown inFIG. 24-26illustrates the cases on where to place the ion releasing tip. If it is at the position of the fan outlet302, and the location is close to one side of the cross section of the fan outlet302, so when the fan blower302blowout the air802which contains the dust particulates and to be purified by the filter, only partial of the dust particulates803can pass through the ion releasing tip202.

Wherein if the ion release tip202is disposed at the position at one end of the fan outlet302, it is being placed closed to one side of the cross-section of the fan blower outlet, which the cross-section is a gradually enlarging one. More precisely, the ion releasing tip202is placing at one side of the cross-section where the airflow is flowing at the high-speed. After passing by the ion releasing tip202, the airflow velocity is slowed down, so those portion of dust particulates804, which did not pass through the ion releasing tip202, will mix with those dust particulates803which had pass through the ion releasing tip202. In the air mixing space, due to the slowed down of the airflows, the dust particulates collide with each other. They adsorbed together (as shown inFIG. 805), integrated to larger dust particulates806.

Wherein if the position of the ion releasing tip202is disposed at the air-mixing space400, and it is in a position which is close to the fan outlet302and near to one side of the cross section of the fan outlet302.

Wherein if the ion releasing tip202is disposed at the position within the air mixing space400, the ion release tip202is still in a junction position of the airflows, where at this junction position, the airflow is changing from laminar flow to turbulent or turbulence flow805; only partial of the layers of the laminar air flow which blow out by the fan air outlet302contains having the dust particulates become electrically charged803. Those layers of the laminar air flow without passing through the ion releasing tip202will have the dust particulates804remains neutral charged. The charged particulates803and the neutral charged particulates804, collide with each other and be adsorbed together onto each other in the air mixing space400, when the airflow turning to turbulence or turbulent805, they integrate together to form the larger size dust particulates806, or form the integrated dust particulates cluster806. The larger dust particulates806, or dust particulates clusters806, will become captured by the filter500after pass through the filter500with the airflow. The purified air807is eventually being discharged from the air outlet102.

Above descriptions only targeting for the embodiments as illustrated in the examples ofFIGS. 24-26, that the air inlet301of the fan blower drawn in the air which are to be purified801and containing the dust particulates. The air outlet302of the fan blower blow out air which is to be purified802and containing the dust particulates. This can be understand that when applying the ion releasing tip202into the embodiments as illustrated in theFIGS. 3 and 6, the fan blower can also draw in the air that contains no dust particulates, or the first airflow that does not require purification, or the second airflow which have not yet be purified by the air purifying component. The first airflow contains less particulate pollutants, when the partial of the first airflow passing through the ion releasing tip202, the airflow will become an ionized airflow or and airflow contains charged particulates pollutants. This airflow further mix with the second airflow to form the third airflow.

FIG. 27is a showing the experimental result on comparison the embodiments as illustrated in theFIG. 24andFIG. 25on the dust removal efficiency on the operating of the ion generator and without operating of the ion generator: (1) embodiment ofFIG. 25of operating of the ion generator, (2) embodimentFIG. 24of operating of the ion generator, (3) embodiment ofFIG. 25of without operating of the ion generator, (4) embodiment ofFIG. 24of without operating of the ion generator. Its dust removal efficiency in descending order: (1)>(2)>(3), (4). Wherein, (1) has a more significant dust removal efficiency compare to (2), (3) and (4) have lower dust removal and similar efficiency. Thus it can be observed that the operation of the ionizer, and maintaining the filtering material to be neutrally charged (avoid the filter become charged), can effectively increase the dust removal efficiency.

FIG. 28illustrates the experimental result on the comparison of the dust removal efficiency when placing the ion releasing tip of the ion generator at different locations. In this study, the following comparison on the air purifying devices: (1) Air purifying device of embodiment 13; (2) Air purifying device of embodiment 13, where an ion releasing tip202is placed at the fan discharge outlet302; (3) Air purifying device of embodiment 13, where the ion releasing tip202is placed in the middle of the fan air inlet301(4) Air purifying device of embodiment 13, where the ion releasing tip202is placed at the air outlet side of the filter. The dust removal efficiency in descending order are:

Wherein, (1) has more significant dust removal efficiency when compare to (2) and (3), (2) and (3) have more significant dust removal efficiency when compare (4), the dust removal efficiency of (2) and (3) are similar. Thus, the place to put the ion releasing tip202of the present invention gives significant impact on purification. This is because the air blow out from the fan blower air outlet302contain only partial of the dust particulates803, which have pass through the ion releasing tip202, become ionized. Those dust particulates804which did not pass through the ion releasing type202remain neutral charged. The charged particulates803and the neutral dust particulates804, when mixing and collide (as illustrate in the arrow805) together due to the turbulent airflow at the air mixing space400. They will cluster together to larger size dust particulates806, or become integrated dust particulates cluster806. When flow through with the filter500, the larger size dust particulates806or integrated dust particulates cluster806will be captured by the filter500. Compare to the small size dust particulates, the chance of capturing dust particulates with increasing dust dimension is higher. Thus, air purification effect is therefore enhanced by this.

FIG. 29illustrates a schematic diagram of the present invention on an air purifying method. The air purification method employed a fan blower301to drawn in and delivery the air which contains the dust particulates804, that is the air8002which needs to be purified by the filter500. At the same time, the air is flowing from upstream to downstream. Wherein, the ion releasing tip202which is placed at one size of the fan blower outlet, or the ion releasing tip202which is placed non-uniformly within the air mixing space400, only allow a partial of dust particulates804in the airflow8002, which the airflow8002is the air to be purified by the filter500and being blown out from the fan outlet301, become charge dust particulates8003. Those dust particulates804in the airflow without pass through the ion releasing tip202will remain as neutrally charged particulates8004. In the air mixing space400, as the airflow is turning from laminar airflow to turbulence airflow8005, the airflow collide with each other, the dust particulates integrate to larger size dust particulates8006, or integrated dust particulates cluster8006. The larger dust particulates8006, or dust particulates clusters806, will become captured by the filter500after pass through the filter500with the airflow. Compare to the smaller size dust particulates, the chance of capturing larger size dust particulates is higher as those dust particulates has a lager dimension. Thus, air purification effect is significant.

The above-described embodiment is merely the expression of several embodiments of the present invention. The description is more specific and detailed, but it cannot therefore be construed as the limitation to the scope of the invention patent. It should be noted that those of ordinary skill in the art, in the present invention without departing from the idea of the present invention, can also make a number of modifications and improvements, which would still be belonged to the scope of the present invention. Accordingly, the scope of the present invention patent protection shall be subject to the claims.