Abstract:
A cooling device comprises a fan, a heat exchanger and an aerosol, whereby water will be nebulized and then ejected by the fan onto the heat exchanger, so that the water drops produced can be easily boiled or vaporized and absorb heat efficiently. This mechanism will save water and electricity significantly and at the same time reduce the temperature of the heat exchanger, therefore enhancing the cooling efficiency of the device. Further, if either the water quality or the air quality of the environment is bad, a pre-treatment of the water to be used by the aerosol is needed so as to prolong the life of the device.

Description:
FIELD OF THE INVENTION  
       [0001]     The present invention relates to cooling devices, and more particularly to a cooling device with an aerosol capable of nebulizing water, and the nebulized water drops will be ejected outward by a fan and fall on a heat exchanger, whereby they may get boiled or vaporized and absorb heat efficiently, and whereby large amounts of electricity and water will be saved. Further, since the temperature of the heat exchanger is low, the cooling effect of an air conditioner or a cooler for a heat generating device can be enhanced. Further, if either the water quality or the air quality of the environment is bad, a pre-treatment of the water to be used by the aerosol is needed so as to prolong the life of the device.  
       BACKGROUND OF THE INVENTION  
       [0002]     The tonnage of the conventional gas-cooling air conditioners and coolers is selected according to the area of a space to be cooled. However, the cooling efficiency of the conventional air conditioners and coolers is low, and therefore they cannot attain the goal of saving energy, leading to high electricity cost. It is an alternative that air conditioners and coolers may use a cooling water tower or a water aerosol for the desired cooling effect. This method is disadvantageous in significant consumption of water, which is a waste of water resource and may pollute the environment after being used for an extended period of time. It is another disadvantage that this type of water-cooling devices will inevitably produce condensed water, which needs extra treatment to prevent water leakage that may cause environmental pollution and waste of water.  
         [0003]     On the other hand, conventional cooling devices for engines can be categorized into two types. The first type utilizes a fan to send a wind to the unit to be cooled. However, the cooling effect is not good enough, especially when the air temperature is high. The second type utilizes a water cooling tower to spray water drops, which is more efficient but wastes a large mount of water. Moreover, the second type may pollute the environment for a long time of usage. Finally, it is very significant to invent a cooling device that is energy-economical, given that the energy price has been growing recently.  
       SUMMARY OF THE INVENTION  
       [0004]     Accordingly, the primary objective of the present invention is to provide a cooling device of high cooling efficiency that solves the above-mentioned disadvantages.  
         [0005]     The present invention mainly comprises a fan, a heat exchanger and an aerosol, whereby the forced convection of the air driven by the fan will blow the heat exchanger, so that the water drops produced can be easily boiled or vaporized and absorb heat efficiently. This mechanism will save water and electricity significantly and at the same time reduce the temperature of the heat exchanger, therefore enhancing the cooling efficiency of the device. Further, if either the water quality or the air quality of the environment is bad, a pre-treatment of the water to be used by the aerosol may be needed so as to lengthen the life of the device. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0006]      FIG. 1  is a perspective view of a preferred embodiment of the first type of aerosols of the present invention.  
         [0007]      FIG. 2  is a perspective view of a second preferred embodiment of the first type of aerosols of the present invention.  
         [0008]      FIG. 3  is a perspective view of a third preferred embodiment of the first type of aerosols of the present invention.  
         [0009]      FIGS. 4 and 6  are perspective views of a preferred embodiment of the first type of aerosols of the present invention, wherein the aerosol is located within the cooling device.  
         [0010]      FIGS. 5 and 7  are perspective views of a preferred embodiment of the first type of aerosols of the present invention, wherein the aerosol is located outside the cooling device.  
         [0011]      FIG. 8  is a perspective view of a preferred embodiment of the second type of aerosols of the present invention.  FIG. 9  is a perspective view of a preferred embodiment of the third type of aerosols of the present invention, wherein the nebulization is caused by water being cut directly by the fan blades. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0012]     The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawings.  
         [0013]     Referring a according to the present invention comprises a fan  1 , an aerosol  2  and a heat exchanger  3 , whereby the heat generated by a compressor or an engine will be transferred to the heat exchanger  3  by a coolant, such as water, and raise the temperature of the exchanger  3 . The aerosol  2  will nebulize water into fine droplets and be blown away by forced convection of the air produced by the fan and then ejected onto the heat exchanger  3 . The water droplets can be easily boiled or vaporized and absorb heat efficiently. Meanwhile, this mechanism will reduce the temperature of the heat exchanger, therefore enhancing the cooling efficiency of the device. The capacity of an air conditioner or a cooler installed with the device is therefore enhanced. Further, the problem of water leakage can be solved.  
         [0014]     Three types of aerosols suitable for the invention will be illustrated as follows.  
         [0015]     Referring to FIGS.  1  to  7 , the first type of aerosols has the aerosol including at least one set of sprinkle-nozzle and pressurizing unit. The pressurizing unit is powered by a pump for transporting pressurized water. The water flows through the sprinkle-nozzle of the pressurizing unit and is ejected onto the fan and then is blown away in the down-stream, up-stream or lateral direction as nebulized droplets, which is then blown onto the heat exchanger, whereby the water droplets can easily boil or vaporize and absorb heat efficiently.  
         [0016]     Referring to  FIG. 8  and as the second type of aerosols, the pressurizing unit of this type can use a water tank storing pressurized water or a water tank higher than the sprinkle-nozzle, whereby the water can be ejected through the sprinkle-nozzle by the intrinsic water pressure or hydrostatic pressure onto the fan. The water is then blown away by the fan in the down-stream, up-stream or lateral direction as nebulized droplets, which is then blown onto the heat exchanger, whereby the water droplets can be easily boiled or vaporized and absorb heat efficiently.  
         [0017]     Referring to  FIG. 9 , as the third type of aerosols, the pressurizing unit of this type can use wind pressure produced by the fast rotation of the blades of the fan, whereby water will be cut by the blades and get mixed up with the air to become nebulized. The nebulized water is then blown away by the fan onto the heat exchanger, whereby the water droplets can be easily boiled or vaporized and absorb heat efficiently.  
         [0018]     Further, the water collected in a water collector can be reused and ejected toward the fan, whereby the water will be cut and get mixed up with the air by the fan blades to form nebulized water droplets, which will be in turn blown onto the heat exchanger by the forced convention induced by the fan. Thereby, the water droplets can be easily boiled or vaporized and absorb heat efficiently.  
         [0019]     The above-mentioned types of aerosols will be described in details with the figures.  
         [0020]     Referring to  FIG. 2 , the first preferred embodiment of the first type aerosols of the present invention includes a pump  231  capable of draining the water left in a water collector  232  and transporting it to the aerosol  2  via a water tube  234 . The water was condensed from the cooling water or deicing water in a vaporizer, which is not shown in the figure. The water from the water tube  234  is then ejected through the sprinkle-nozzle  21  toward the fan  1  in a direction countering the wind. The water is thereby nebulized and then blown onto the heat exchanger  3  by a forced convention induced by the fan  1 , whereby the water droplets can be easily boiled or vaporized and absorb heat efficiently.  
         [0021]     Referring to  FIG. 3  and as another preferred embodiment of the first type of aerosols, the cooling device has the aerosol  2  disposed between the fan  1  and the heat exchanger  3 . Further the aerosol  2  can be installed right in front of the heat exchanger  3 , whereby the water droplets from the aerosol  2  can be drawn onto the heat exchanger  3  by the fan  1  directly.  
         [0022]     Further, referring to  FIGS. 4-7  and as other preferred embodiments of the first type, the aerosol  2  thereof is disposed within the cooling device (as shown in  FIGS. 4 and 6 ) or on a sidewall, the top surface or the bottom surface of the outer case (as shown in  FIGS. 5 and 7 ). Thereby, when the cooling water is nebulized by the aerosol  2 , the fan  1  will blow it onto the heat exchanger  3  directly.  
         [0023]     Referring to  FIG. 8 , a preferred embodiment of the second type of aerosols includes a pressurizing unit in the aerosol powered by either the pump  231  or a water tank  233  located at a predetermined height above the sprinkle-nozzle  21 . In the latter pressuring means, the water flown from the water tank  233  through the water tube  234  to the sprinkle-nozzle  21  is pressurized and can be sufficiently nebulized. The nebulized water is then transported to the heat exchanger  3  by a forced convection induced by the fan  1 , whereby the water droplets can be easily boiled or vaporized and absorb heat efficiently.  
         [0024]     Referring to  FIG. 9 , the a preferred embodiment of the third type of aerosols has the aerosol using wind pressure produced by the fast rotation of the blades of the fan, whereby water will be cut by the blades  12  and get mixed up with the air to become nebulized. The nebulized water is then blown away by the fan  1  onto the heat exchanger  3 , whereby the water droplets can be easily boiled or vaporized and absorb heat efficiently.  
         [0025]     Referring to  FIG. 9 , the aerosol of the cooling device of the present invention takes water from a first water collector  41  under the fan  1 . One side of the set of the blades  12  is immersed into a second water collector  232 . When the cooling water or deicing water condensed from a vaporizer of an air conditioner and flows into the second water collector  232  or an external water supplying collector  232 , the portion of the blades  12  immersed in the water will rotate quickly, whereby the water will be cut by the blades  12  and get mixed up with the air to become nebulized. The nebulization can also be done by draining water from the second water collector  232  and then injecting onto the blades  12  of the fan  1 , whereby the water will be cut by the blades  12  and get mixed up with the air by the forced convection to become nebulized. The forced convection induced by the fan  1  will blow the nebulized water onto the heat exchanger  3 , whereby the water droplets can be easily boiled or vaporized and absorb heat efficiently. Further, the fan  1  of the cooling device can be added as an external unit, and the second water collector  232  can have a sloppy bottom and include a cleansing outlet at the lowest place on the bottom.  
         [0026]     The water source for the aerosol can be selected from regularly processed water, purified cooling water and purified deiced water by a water treatment means. The mixture of the above mentioned types of water can also be used.  
         [0027]     When the water quality or the air quality is low, the cooling water used by the aerosol can be added with chemicals or go through a water treatment means, such as magnetic, nano-particle or quantum methods, whereby the water can be purified. This will lengthen the durability of the heat exchanger  3 .  
         [0028]     The aerosol may be further equipped with a control unit to activate the aerosol in accordance with the setting of the cooling temperature, so as to enhance the efficiency of the aerosol.  
         [0029]     The above mentioned twisted tube can be installed vertically or horizontally into the heat exchanger. The outer surface of the twisted tube can have fins, added or intrinsically formed, or a screw thread for better heat exchange. The twisted tube can be made of materials of high thermal conductivity.  
         [0030]     The aluminum fins attached onto the copper tube can be treated by surface treatment means for lengthening their durability.  
         [0031]     The present invention is thus described, and it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.