Patent Description:
Vacuum cleaner is a kind of electrical appliances commonly used in production and life, mainly used for cleaning and collecting dust and debris. The conventional vacuum cleaners on the market have good performance when cleaning up dust, garbage and other debris with low adsorption on the carpet and the ground. However, it is impossible to completely clean up the dust attached to the wall or the cracks or the debris with certain adhesion, which seriously affects users' experience of the conventional vacuum cleaner.

A debris blowing and/or vacuum appliance is disclosed in <CIT>, wherein a height of the fan housing in a direction of the rotational axis increasing along a direction of the air flow.

Therefore, it is necessary to further improve the conventional vacuum cleaner to solve the problems mentioned above.

In view of this, a vacuum cleaner with the fan assembly is provided to solve the problem that the conventional vacuum cleaner cannot completely clean up the dust attached to the wall or the cracks or the debris with certain adhesion.

The invention is embodied in the independent claim. Optional embodiments are reflected by the dependent claims <NUM> to <NUM>.

In summary, the fan assembly of the disclosure is provided with a spiral air channel in the fan housing, so that when the motor rotates, the fan blade can be driven to rotate and a high-pressure airflow is formed at the top of the fan blade. Then the high-pressure airflow flows out along the spiral air channel in the fan housing. The spiral air channel is beneficial to reduce wind pressure loss and wind resistance, increase air flow, and improve the suction effect and working efficiency of the vacuum cleaner to a certain extent.

In order to explain the embodiments of the disclosure or the technical solutions in the conventional art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the conventional art. Obviously, the drawings in the following description are only some embodiments of the disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

The following describes the implementation of the disclosure through specific embodiments, and those skilled in the art can easily understand other advantages and effects of the disclosure from the content disclosed in this specification. The disclosure can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the disclosure. It should be noted that, the following embodiments and the features in the embodiments can be combined with each other without conflict. It should further be understood that the terms used in the examples of the disclosure are used to describe specific embodiments, instead of limiting the protection scope of the disclosure. The test methods that do not indicate specific conditions in the following examples are usually in accordance with conventional conditions, or conditions recommended by each manufacturer.

It should be noted that the structure, scale, size, etc. of the drawings in this specification are merely for illustration of the disclosed content for understanding and reading by those skilled in the art, and do not intend to limit the restrictive conditions under which the disclosure can be implemented, so it has no technical significance. Any structural modification, proportional relationship change or size adjustment should still be within the scope of the technical content disclosed in the disclosure, without affecting the effects and objectives that can be achieved by the disclosure. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the disclosure. The change or adjustment of the relative relationship should also be regarded as the applicable scope of the disclosure without substantial change in the technical content.

The disclosure provides a fan assembly and a vacuum cleaner with the fan assembly. The vacuum cleaner can improve the suction effect to a certain extent, which improves work efficiency.

Please refer to <FIG> and <FIG>. The disclosure provides a vacuum cleaner <NUM>, the vacuum cleaner <NUM> includes a housing, a dust suction assembly <NUM>, a filter assembly <NUM> and a fan assembly <NUM>. The housing is provided with a dust collection cavity <NUM>, a mounting cavity <NUM>, and a through hole <NUM> communicating the dust collection cavity <NUM> and the mounting cavity <NUM>. The dust suction assembly <NUM> is arranged on the housing and communicates with the dust collection cavity <NUM>. The filter assembly <NUM> is arranged in the dust collection cavity <NUM>. The fan assembly <NUM> is installed in the mounting cavity <NUM>.

Please refer to <FIG>, the housing includes a dust collector <NUM>, a middle cover assembly <NUM> arranged above the dust collector <NUM> and an upper cover assembly <NUM> covering the middle cover assembly <NUM>. A dust collection cavity <NUM> is formed between the dust collector <NUM> and the middle cover assembly <NUM>, and a mounting cavity <NUM> is formed between the upper cover assembly <NUM> and the middle cover assembly <NUM>. The upper cover assembly <NUM> is provided with an air inlet <NUM> communicating with the dust suction assembly <NUM>, and an air outlet <NUM>' is arranged between the middle cover assembly <NUM> and the upper cover assembly <NUM>. The dust collector <NUM> is capable of being made into various shapes. In one embodiment, the dust collector <NUM> is rectangular and includes a bottom wall <NUM> and a side wall <NUM> for connecting the bottom wall <NUM> and the middle cover assembly <NUM>. The side walls <NUM> are provided with four and jointly define a housing space with the bottom wall <NUM>. The middle cover assembly <NUM> protrudes into the housing space and forms a dust collection cavity <NUM> with it, and the filter assembly <NUM> is housed in the dust collection cavity <NUM>. The fan assembly <NUM> is arranged in the mounting cavity <NUM> between the middle cover assembly <NUM> and the upper cover assembly <NUM> and communicates with connecting the dust collector <NUM>. The side wall <NUM> of the dust collector <NUM> is also provided with a connecting part <NUM> for connecting and fixing the middle cover assembly <NUM> and the upper cover assembly <NUM>. In this embodiment, the connecting part <NUM> is configured as a movable buckle, so that the middle cover assembly <NUM> and the upper cover assembly <NUM> are detachably fixed on the dust collector <NUM>.

Please refer to <FIG> and <FIG>, the middle cover assembly <NUM> includes a middle cover body <NUM> arranged on the dust collector <NUM> and a recessed part <NUM> denting from the middle cover body <NUM> toward the inside of the dust collector <NUM>. In addition, the bottom wall of the recessed part <NUM> is provided with a through hole <NUM> for communicating the dust collection cavity <NUM> and the mounting cavity <NUM>. In this embodiment, the middle cover assembly <NUM> is embedded and fixed on the dust collector <NUM>, and a sealing ring <NUM> is also arranged between the middle cover assembly <NUM> and the dust collector <NUM> to ensure that the middle cover assembly <NUM> and the dust collector <NUM> are arranged tightly and prevent air from escaping into the dust collector <NUM> from the gap between mounting positions of the middle cover assembly <NUM> and the dust collector <NUM> due to the pressure difference during the working process of the vacuum cleaner <NUM>, which ensures the working efficiency of the vacuum cleaner <NUM>. Specifically, during the assembly process of the vacuum cleaner <NUM> of the disclosure, at first, the middle cover assembly <NUM> is fixed on the dust collector <NUM>. Secondly, the upper cover assembly <NUM> is used to cover on the middle cover assembly <NUM>. At last, the connecting part <NUM> is fastened to fix the middle cover assembly <NUM> and the upper cover assembly <NUM> on the dust collector <NUM>, which ensures that the upper cover assembly <NUM> and the middle cover assembly <NUM> are stably connected with the dust collector <NUM> during the working process.

Please refer to <FIG>, <FIG>, <FIG> and <FIG>, the upper cover assembly <NUM> is used to cover on the middle cover assembly <NUM> and is detachably connected with the dust collector <NUM> through the connecting part <NUM>. A battery cavity <NUM> for housing a battery pack <NUM> is formed in the upper cover assembly <NUM>, a battery insert <NUM> is arranged in the battery cavity <NUM>, and the battery insert <NUM> is arranged corresponding to the battery pack <NUM>. The battery cavity <NUM> is formed through denting from a top of the upper cover assembly <NUM> toward the dust collector <NUM> (downward). Correspondingly, the position of the middle cover assembly <NUM> corresponding to the battery cavity <NUM> is recessed in the direction of the dust collector <NUM> to receive the battery cavity <NUM>, and the battery cavity <NUM> is arranged on a different side of the recessed part <NUM> of the middle cover assembly <NUM>. With this arrangement, a motor <NUM> and the battery pack <NUM> are respectively located at two ends of the vacuum cleaner <NUM>, so that the center of gravity of the vacuum cleaner <NUM> is approximately at the center of the housing, thereby avoiding the problem that the vacuum cleaner <NUM> is difficult to carry due to one side being too heavy. The battery pack <NUM> is housed in the battery cavity <NUM> and plugged on the battery insert <NUM> to provide power to the vacuum cleaner <NUM>. An upper part of the battery cavity <NUM> is provided with a battery pack cover <NUM> covering the battery cavity <NUM>, and the battery pack cover <NUM> is movably connected with the upper cover assembly <NUM>. In this embodiment, the battery pack cover <NUM> and the upper cover assembly <NUM> are pivotally connected, and it can be understood that the connection method is not limited to this. With this arrangement, the battery pack <NUM> of the vacuum cleaner <NUM> of the disclosure is capable of being mounted and removed only through opening the battery pack cover <NUM>, which improves the convenience to use the vacuum cleaner <NUM>. The upper cover assembly <NUM> is further provided with a handle <NUM>, and the handle <NUM> is capable of being freely rotated on the upper cover assembly <NUM> to facilitate the use and movement of the vacuum cleaner <NUM>.

Please refer to <FIG> and <FIG>, the dust suction assembly <NUM> includes a throat pipe <NUM> and a dust suction accessory <NUM> connected with the throat pipe <NUM>. The throat pipe <NUM> includes a soft throat pipe <NUM> and a hard throat pipe <NUM> arranged on both sides of the soft throat <NUM>. A first side of the soft throat pipe <NUM> is fixed on the upper cover assembly <NUM> through the hard throat pipe <NUM> and a connecting part <NUM>, and a second side is connected to the dust suction accessory <NUM> through the hard throat pipe <NUM>, so that the throat pipe <NUM> is capable of working through the dust suction accessory <NUM>. The dust suction accessory <NUM> is capable of being a commonly used accessory of the vacuum cleaner <NUM> such as a floor brush, a flat vacuum, a round brush, a bed sheet brush, a sofa vacuum and so on, which means that the dust suction accessory <NUM> is capable of being selected and replaced according to the location where the vacuum cleaner <NUM> is used, and it is not limited here.

Please refer to <FIG>, <FIG>, an accessory groove <NUM> for housing the dust suction accessory <NUM> is further formed in the upper cover assembly <NUM>, and the accessory groove <NUM> is recessed from the top of the upper cover assembly <NUM> toward the dust collector <NUM>. Preferably, the accessory groove <NUM> is located beside the battery cavity <NUM> and is simultaneously covered by the battery pack cover <NUM>. With this arrangement, not only the dust suction accessory <NUM> can be stored well, be convenient for storage and avoid damage, but also it is convenient for access. Under the condition that the connection between the upper cover assembly <NUM> with the middle cover assembly <NUM> and the dust collector <NUM> is maintained, the dust suction attachment <NUM> is capable of being replaced as needed. The upper cover assembly <NUM> is also provided with a fixing component <NUM> for fixing the hard throat <NUM> and a groove <NUM> for housing the soft throat <NUM>. The groove <NUM> is formed through denting downwardly from an upper surface of the upper cover assembly <NUM>. The fixing component <NUM> is an arc-shaped gasket. In the storage state, the hard throat pipe <NUM> at the second side is placed on the gasket <NUM> to match the groove <NUM> to jointly fix and limit the throat pipe <NUM>, which makes the throat <NUM> be fixed on the upper cover assembly <NUM>.

Please refer to <FIG>, <FIG> and <FIG> through <FIG>, the fan assembly <NUM> includes a motor <NUM>, an impeller <NUM> and a fan housing. The impeller <NUM> is arranged on the output shaft of the motor <NUM> and is driven by the motor <NUM>. The impeller <NUM> includes an impeller air outlet <NUM> and an impeller air inlet <NUM>. The impeller air inlet <NUM> is located in the axial direction of the impeller <NUM> and is communicated with the through hole <NUM>. The impeller air outlet <NUM> is located in the radial direction of the impeller <NUM>. An air channel <NUM> is formed in the fan housing, the impeller <NUM> is at least partially housed in the fan housing, and a height of the fan housing in the direction of a rotational axis increases along the direction of the airflow. In an embodiment, the fan assembly <NUM> is arranged in the recessed part <NUM> of the middle cover assembly <NUM>. Specifically, the motor <NUM> is placed vertically. The impeller <NUM> is connected to the motor shaft <NUM> of the motor <NUM>, and the impeller <NUM> is housed in the recessed part <NUM>. The impeller air inlet <NUM> is located on the axis of the impeller <NUM> and is directly opposite to the through hole <NUM> on the bottom wall of the recessed part <NUM>. The outlet direction of the impeller air outlet <NUM> is perpendicular to the axis of the impeller <NUM>. Therefore, when the motor <NUM> rotates, the impeller <NUM> is driven to rotate and a high pressure area is formed at a top of the impeller <NUM>, so that the airflow moves from a low pressure area to a high pressure area, and a spiral upward airflow direction with the vertical direction as an axis is generated at the position of the fan assembly <NUM>. The fan housing includes an upper housing <NUM> and a lower housing. The upper housing <NUM> is a ring-shaped structure, and the bottom thereof is in a shape of an opening, so that the cross section in the direction of the rotational axis of upper housing <NUM> of the fan housing is in an inverted U-shape. An inner side wall <NUM> of the upper housing <NUM> is connected by a connecting plate <NUM>, and the connecting plate <NUM> is provided with a through hole for the motor shaft <NUM> to pass through. The lower housing includes a bottom wall and side walls arranged in the circumferential direction along the bottom wall. The side walls of the lower housing are connected with outer side walls <NUM> of the upper housing <NUM>, so that the upper housing <NUM> and the lower housing form an air channel <NUM>. In this embodiment, the bottom wall of the recessed part <NUM> of the middle cover assembly is the lower housing of the fan housing, and the air channel <NUM> is formed by the combination of the upper housing <NUM> of the fan housing and the bottom wall of the recessed part <NUM> of the middle cover assembly <NUM>. Preferably, a circular arc structure <NUM> is formed at the position of the recessed part <NUM> corresponding to the upper housing <NUM> of the fan housing, and the circular arc structure <NUM> is used to guide high-pressure airflow around the impeller <NUM> upwards into the air channel <NUM>. In other embodiments, the lower housing can also be set up separately, so that an air channel <NUM> is formed between the upper housing <NUM> and the lower housing, which is not limited to this.

Please refer to <FIG>, the upper housing <NUM> of the fan housing is provided with a first end A, a spiral part <NUM> spirally extending upward from the first end A, and a second end B located at the end of the spiral part <NUM>. In other words, the spiral part <NUM> spirals from the first end A to the second end B until the first end A and the second end B merge. At this time, a round of spiral is completed. A fan air outlet <NUM> is arranged at the second end B of the upper housing <NUM> of the fan housing. The fan air outlet <NUM> communicates with the air outlet <NUM>'. The high-pressure airflow spirally flows in the air channel <NUM> and is finally discharged from the air outlet <NUM>'. After the high-pressure airflow is discharged from the air outlet <NUM>', a negative pressure is formed inside the dust suction assembly <NUM>, which encourages external air to enter the soft throat pipe <NUM> from the dust suction accessory <NUM>, and the function of the vacuum cleaner <NUM> is completed at this time. In this embodiment, the base surfaces of the first end A, the spiral part <NUM>, and the second end B are in the same plane, and the height of the spiral part <NUM> close to the first end A is lower than the height of the spiral part <NUM> close to the second end B, so that the top surface of the spiral part <NUM> is spiral. The top surface of the spiral part <NUM> is designed as a spiral shape to form a spiral air channel <NUM> inside the fan housing. Of course, in other embodiments, the overall height of the spiral part <NUM> may be kept constant, and then a groove is formed at the bottom of the spiral part <NUM> to form a spiral air channel <NUM>, which is not limited here. In this embodiment, the top surface of the spiral part <NUM> gradually spirally extends upward along the helix angle α. The helix angle α is preferably a constant angle. As shown in <FIG>, the helix angle α is the angle between a tangent of the helix on the top surface and a plane perpendicular to a helix axis (i.e., the horizontal plane). In this embodiment, the helix angle is one of the important parameters that affect the wind resistance of the air channel and the work efficiency.

Table <NUM> shows that the upper housings <NUM> of the fan housing with different helix angles are applied to the vacuum cleaner <NUM>. When the vacuum cleaner <NUM> is working normally (which means when the working voltage remains the same), current, shaft power, fluid power, flow, total pressure and work efficiency will be analyzed and then specific values can be obtained. The specific values are shown in the table below.

It can be seen from the above table: under the voltage of 36V, the helix angle is set between <NUM>° to <NUM>°. When the helix angle is <NUM>°, the working efficiency of the vacuum cleaner <NUM> reaches <NUM>%, and when the helix angle is <NUM>°, the working efficiency of the vacuum cleaner <NUM> reaches <NUM>%. At this time, the current value, the shaft power and the total voltage are all low. When the helix angle is <NUM>°, the working efficiency of the vacuum cleaner <NUM> is <NUM>%, and the current value, the shaft power, the fluid power and the total pressure are all high at this time. When the helix angle is <NUM>°, the working efficiency of the vacuum cleaner <NUM> is <NUM>%. When the helix angle is <NUM>°, the working efficiency of the vacuum cleaner <NUM> reaches <NUM>%, which is the highest value, and at the same time the flow also reaches the maximum. From this data, it can be concluded that under the same voltage, when the helix angle of the spiral part <NUM> is between <NUM> degrees to <NUM> degrees, the working efficiency of the vacuum cleaner <NUM> will gradually increase and reach the highest value when the helix angle is <NUM>°. Therefore, the helix angle of the top surface of the spiral part <NUM> is preferably <NUM> degrees to <NUM> degrees. Such a design is beneficial to reduce wind pressure loss and wind resistance, improve air flow, and increase work efficiency by about <NUM>% to a certain extent.

Please refer to <FIG>, in one embodiment, the motor <NUM> can be selected as a brushless motor. The brushless motor is not provided with brushes, so that the brushless motor can rotate at a high speed with low noise. Secondly, the volume of the brushless motor is smaller, which can free up more space for housing the battery assembly and extend the endurance time of the vacuum cleaner <NUM>. The brushless motor is also provided with a fan blade <NUM> for heat dissipation. The fan blade <NUM> is located between the brushless motor and the impeller <NUM>. When the brushless motor is working, the fan blade <NUM> is driven by the brushless motor to rotate, thereby driving wind from an end of the brushless motor away from the fan blade <NUM> into the brushless motor. Then the wind is discharged from the gap between the brushless motor and the recessed part <NUM> of the middle cover assembly <NUM>, which means that the cooling wind enters the brushless motor along the direction C, and then exits along the direction D, so that heat is dissipated from the brushless motor. In other embodiments, the fan blade <NUM> is also capable of being arranged at the end of the brushless motor away from the impeller <NUM>, the cooling wind is introduced into the brushless motor along the direction C, and then discharged along the direction D. Or the cooling wind enters the brushless motor along the opposite direction of the direction D, and then exits along the opposite direction of the direction C.

The rated rotating speed of the impeller <NUM> is set between <NUM>,<NUM> rpm to <NUM>,<NUM> rpm, and the diameter of the impeller <NUM> is set between <NUM> and <NUM>. With this arrangement, the total pressure efficiency of the vacuum cleaner <NUM> is relatively high, so that the dust suction efficiency of the vacuum cleaner <NUM> can be improved. The rotating speed of the impeller <NUM> may also be greater than <NUM>,<NUM> rpm, and the diameter of the impeller <NUM> may be less than <NUM> or greater than <NUM>, which is not a limited herein. Preferably, the diameter of the impeller <NUM> is between <NUM> to <NUM>. When the rated rotating speed of the impeller <NUM> is set to <NUM>,<NUM> rpm, and the diameter of the impeller <NUM> is set to <NUM>, the impeller <NUM> has the highest total pressure efficiency at this time. Preferably, the diameter of the impeller <NUM> is set to <NUM>. With this arrangement, when the rotating speed of the impeller <NUM> is between <NUM>,<NUM> rpm to <NUM>,<NUM> rpm, the vacuum cleaner <NUM> has a better total pressure efficiency, so that the fan suction assembly <NUM> is capable of being applied widely.

Please refer to <FIG> and <FIG>, the filter assembly <NUM> includes a filter element <NUM>. The filter element <NUM> is fixedly arranged in the dust collection cavity <NUM> formed by the dust collector <NUM> and the middle cover assembly <NUM>, located below the impeller <NUM>, and communicates with the through hole <NUM> in the bottom wall of the recessed part <NUM> of the middle cover assembly <NUM>, so that when the impeller <NUM> rotates, the filtered gas will be sucked into the impeller <NUM> and a high-pressure airflow is formed at the top of the impeller <NUM>, which makes the high-pressure airflow flows out along the spiral air channel <NUM> inside the fan housing. Since the specific structure of the filter assembly <NUM> can adopt conventional technical solutions, it will not be repeated here.

In summary, the air flow direction of the vacuum cleaner <NUM> of the disclosure is: the air flow carries impurities into the dust collector <NUM> through the dust suction accessory <NUM>, the throat pipe <NUM> and the air inlet <NUM>. After filtered by the filter assembly <NUM>, the impurities will fall into the dust collector <NUM>. The air flow continues to flow along the spiral air channel <NUM> in the fan housing, so that when the motor <NUM> rotates, the impeller <NUM> can be driven to rotate and a high-pressure air flow can be formed at the top of the impeller <NUM>. Then the high-pressure air flows out from the air outlet <NUM>' along the spiral air channel <NUM> in the fan housing. The spiral air channel <NUM> is beneficial to reduce wind pressure loss and wind resistance, improves air flow, and improves suction effect and working efficiency of the vacuum cleaner <NUM> to a certain extent.

Claim 1:
A vacuum cleaner, comprising:
a housing, wherein a dust collection cavity (<NUM>), a mounting cavity (<NUM>), and a through hole (<NUM>) communicating the dust collection cavity (<NUM>) and the mounting cavity (<NUM>) are arranged in the housing,
a dust suction assembly (<NUM>), one end thereof passing through the housing and extending to the dust collection cavity (<NUM>),
a filter assembly (<NUM>), arranged in the dust collection cavity (<NUM>), and
a fan assembly (<NUM>), arranged in the mounting cavity (<NUM>), and comprising:
an impeller (<NUM>), driven by a motor (<NUM>), the impeller (<NUM>) comprising an impeller air inlet (<NUM>) located in an axial direction of the impeller (<NUM>) and an impeller air outlet (<NUM>) located in a radial direction of the impeller (<NUM>), and
a fan housing, defining an air channel (<NUM>) therein, the impeller (<NUM>) being at least partially housed in the fan housing, the impeller (<NUM>) rotating relative to the fan housing about a rotational axis, a generated airflow entering the air channel (<NUM>) during a rotation of the impeller (<NUM>), and a height of the fan housing in a direction of the rotational axis increasing along a direction of the air flow, characterized in that the housing comprising a dust collector (<NUM>), a middle cover assembly (<NUM>) and an upper cover assembly (<NUM>), the middle cover assembly (<NUM>) is arranged above the dust collector (<NUM>) and forms the dust collection cavity (<NUM>) with the dust collector (<NUM>), the upper cover assembly (<NUM>) is arranged above the middle cover assembly (<NUM>) and forms the mounting cavity (<NUM>) with the middle cover assembly (<NUM>).