JP2006292269A - Cooling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized, lightweight, and inexpensive cooling device. <P>SOLUTION: The cooling device 1 comprises a casing 3 for storing internal equipment, a Peltier element 5 provided in the casing 3, a heat radiating heat sink 7 provided on the casing outer side relative to the Peltier element 5, a heat absorbing heat sink 11 provided on the casing inner side relative to the Peltier element 5 and having heat absorbing fins 51 planted thereon; and cold air stirring fans 13 and 15 provided within the casing, which blow air along the fins 51 of the heat sink 11 and stir the air cooled by the fins 51 within the casing. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cooling device that cools equipment inside a housing, and more particularly, to a cooling device that includes a Peltier element.

  2. Description of the Related Art Conventionally, electronic devices typified by computers have been remarkably developed, and various outdoor devices with built-in computers are used as well as indoor devices. Examples of such outdoor equipment include a road camera control device. This type of control device is installed on a sidewalk and connected to a road camera on a column.

  By the way, the CPU and HDD device, which are the main parts of a computer, are vulnerable to heat, and malfunction occurs when the ambient temperature rises excessively. Therefore, it is necessary to keep the ambient temperature of the CPU and HDD device below a certain value. Therefore, the conventional indoor device has a plurality of powerful fans on the top surface. Moreover, in order to obtain a larger cooling capacity, the conventional outdoor equipment includes a heat exchanger on the top surface, and the above-mentioned road camera control device is also an example.

On the other hand, Peltier elements are known as techniques that enable downsizing of the cooling device (Patent Documents 1 and 2). The Peltier element is a thermoelectric semiconductor element, and the temperature of one element surface is decreased and the temperature of the other element surface is increased by supplying a current. For example, in Patent Document 1, the heat inside the device is moved out of the device by a heat pipe and cooled by a Peltier element.
JP 2000-165077 A (page 4-5, FIG. 3) Japanese Patent Laid-Open No. 11-153367 (page 2-3, FIG. 2)

  However, the conventional cooling device has a low cooling capacity, and there is a problem that the size is increased and the cost is increased if sufficient cooling capacity is obtained. For example, in the case of the above-mentioned road camera control device, the outside air temperature reaches about 50 degrees, and the temperature inside the apparatus reaches about 65 degrees. On the other hand, the upper limit temperature of the HDD device is about 40 degrees. For this reason, a strong cooling capability is required that exceeds a certain device temperature drop and lowers the ambient temperature in the casing below the ambient temperature. In order to sufficiently reduce the internal temperature of the equipment in response to such demands, conventionally, it is necessary to install a large heat exchanger, the structure is complicated, the overall weight of the apparatus is increased, and the cost is increased. . In addition, a large heat exchanger is installed on the upper part of the device, which is disadvantageous in terms of stability. Moreover, although the conventional Peltier element type cooling device is small in size, the cooling capacity is limited, and it is not easy to effectively lower the ambient temperature in the device under the above severe conditions.

  Moreover, in outdoor equipment, water accumulates due to condensation accompanying cooling, and the water evaporates when the internal temperature rises due to solar heat. Therefore, the internal environment tends to be in a high temperature / high humidity state. Such an environment may cause circuit troubles due to rusting or migration of equipment mounted in the housing. Therefore, it is desirable to effectively drain the water in the device.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide a cooling device that is small, lightweight, inexpensive, and capable of obtaining a high cooling capacity.

  The cooling device of the present invention includes a housing that houses internal equipment, a Peltier element provided in the housing, a heat radiation heat sink provided on the outside of the housing with respect to the Peltier element, and the Peltier element. An endothermic heat sink provided on the inner side of the casing, and a plurality of endothermic fins standing upright, and provided inside the casing, blown along the endothermic fins of the endothermic heat sink, and cooled by the endothermic fins A cool air agitation fan for agitating air in the housing.

  With this configuration, the heat dissipation heat sink and the heat absorption heat sink are provided on both sides of the Peltier element, and further, the cool air agitation fan that agitates the cold air in the housing by blowing air to the heat absorption heat sink is provided, so that the heat release through the Peltier element is effective. Can be promoted. In addition, the apparatus can be downsized with the same ability as that of a conventional heat exchanger. Therefore, it is possible to provide a cooling device that is small, lightweight, inexpensive, and has a high cooling capacity.

  In the cooling device of the present invention, a plurality of the cooling air agitation fans are disposed at both ends in the direction of the heat absorption fins across the heat absorption heat sink, and the plurality of the cooling air agitation fans blow air in opposite directions. And arranged so as to be shifted laterally with respect to the blowing direction. With this configuration, it is possible to promote the stirring of the air in the housing and further improve the cooling capacity.

  In the cooling device of the present invention, a heat radiating fan that releases heat of the heat radiating heat sink is provided. With this configuration, heat dissipation from the heat dissipation heat sink can be promoted, and the cooling capacity can be further improved.

  Moreover, in the cooling device of the present invention, an air chamber is provided along the inner surface of the casing and is isolated from the casing inner space, and the outer surface of the casing is covered with a heat insulating material. With this configuration, it is possible to prevent the cool air in the housing from escaping and improve the cooling capacity.

  In the cooling device of the present invention, a water receiving tray is disposed below the endothermic heat sink, and a water draining member containing an absorbent that absorbs water is connected to a water draining hole at the bottom of the water receiving tray. Yes. With this configuration, water in the housing caused by condensation can be effectively discharged.

  In the cooling device of the present invention, the absorbent is cotton yarn, the draining member is a pipe, and extends to the outside of the housing. With this configuration, it is possible to effectively promote moisture discharge with an inexpensive material.

  The present invention includes a heat sink and an endothermic heat sink on both sides of the Peltier element, and further includes a cool air agitation fan that stirs the interior of the housing by blowing air to the endothermic heat sink, effectively promoting heat release through the Peltier element Therefore, it is possible to provide a cooling device having an effect that a high cooling capacity can be exhibited with a small, light, and inexpensive configuration.

  Hereinafter, a cooling device according to an embodiment of the present invention will be described with reference to the drawings.

  1 and 2 show a cooling device according to an embodiment of the present invention. The cooling device of the present embodiment is provided in an outdoor device, and more specifically, is provided in a control device for a road camera. However, the present invention is not limited to outdoor equipment, and a cooling device may be provided in indoor equipment.

  In FIG. 1, the cooling device 1 includes, as a schematic configuration, a housing 3, a Peltier element 5 provided on a wall surface of the housing 3, a heat dissipation heat sink 7 provided outside the Peltier element 5, A heat dissipating fan 9 attached to the heat dissipating heat sink 7, a heat absorbing heat sink 11 provided on the inner side with respect to the Peltier element 5, and a pair of cold air agitating fans 13 provided in the casing so as to blow air to the heat absorbing heat sink 11. 15, and a water receiving tray 17 at the lower part of the endothermic heat sink 11, and a drain pipe 19 extends from the water receiving tray 17 to the outside of the housing. Hereinafter, the configuration of each unit will be described in detail.

  The housing 3 is composed of a plate-shaped housing member 21 and accommodates an internal device 23. The internal device 23 is, for example, a computer that includes a CPU and an HDD device. A Peltier element 5 is provided on one wall surface of the housing 3. As is well known, the Peltier element 5 is a thermoelectric semiconductor element. The Peltier element 5 is plate-shaped, one surface is a high temperature surface, and the other surface is a low temperature surface. A current supply cord is connected to the Peltier element 5, and when the current is supplied, the temperature of the high temperature surface rises and the temperature of the low temperature surface decreases. The Peltier element 5 is disposed such that the high temperature surface faces the outside of the housing and the low temperature surface faces the inside of the housing. In the present invention, the position of the Peltier element 5 is not limited, and may be provided on the ceiling, for example.

  A heat sink 7 is in close contact with the high temperature surface (surface facing outward) of the Peltier element 5. The heat radiating heat sink 7 is an aluminum block and has a configuration in which a plurality of heat radiating fins 33 are erected in parallel on a base plate portion 31. The back surface of the base plate portion 31 of the heat sink 7 is in close contact with the Peltier element 5. The size of the base plate portion 31 is larger than that of the Peltier element 5, and the Peltier element 5 is disposed at the approximate center of the base plate portion 31. Thermal conductive grease is applied between the Peltier element 5 and the heat sink 7.

  The heat dissipation fan 9 includes a hood 37, and the hood 37 covers the heat dissipation heat sink 7. The heat radiating fan 9 is disposed outside the top of the heat radiating fins 33. The heat radiating fan 9 is arranged so as to blow out air (hot air) in the gap between the heat radiating fins 33, that is, to blow air in the direction of the arrow 37 in FIG.

  On the other hand, a copper cooling plate 41 is in close contact with the low temperature surface (surface facing inward) of the Peltier element 5, and the endothermic heat sink 11 is in close contact with the opposite side of the cooling plate 41. Thermal conductive grease is applied between the Peltier element 5 and the cooling plate 41, and thermal conductive grease is also applied between the cooling plate 41 and the endothermic heat sink 11.

  The endothermic heat sink 11 is an aluminum block and is located inside the housing 3. The endothermic heat sink 11 is fixed to the cooling plate 41 with screws 43. The endothermic heat sink 11 is fastened to the fixing plate 47 with screws 45 and is fixed to the inner surface of the wall portion of the housing 3 by the fixing plate 47.

  The endothermic heat sink 11 has a configuration in which a plurality of endothermic fins 51 are erected in parallel on a base plate portion 49. The back surface of the base plate portion 49 is in close contact with the cooling plate 41. The heat absorption fins 51 extend in the horizontal direction. The size of the heat absorbing heat sink 11 is larger than that of the cooling plate 41 and the Peltier element 5 and larger than that of the outer heat sink 7. The cold guide plate 41 and the Peltier element 5 are located substantially at the center of the heat absorbing heat sink 11.

  As shown in FIG. 2, the pair of cool air agitating fans 13 and 15 are attached to both ends of the endothermic heat sink 11 in the endothermic fin direction (horizontal direction). That is, when viewed from the inside of the housing 3, the cool air stirring fan 13 is located at the right end, and the cool air stirring fan 15 is located at the left end. And each fan 13 and 15 for cold air stirring is arrange | positioned so that the direction along the heat absorption fin 51 may be faced, and it may blow | bend in this direction. Therefore, the cooling air agitation fans 13 and 15 blow air in opposite directions from both sides of the endothermic heat sink 11.

  Further, the cooling air agitation fans 13 and 15 are in a position shifted laterally with respect to the blowing direction. More specifically, the left cool air stirring fan 13 is positioned above the endothermic heat sink 11, and the right cool air stirring fan 15 is positioned below the endothermic heat sink 11. Therefore, both fans are in a positional relationship that does not directly face each other.

  As shown in FIG. 1, a water receiving tray 17 is provided below the endothermic heat sink 11. The water receiving tray 17 is fixed to the endothermic heat sink 11 or the housing 3. On the water receiving tray 17, water droplets generated by condensation on the heat absorbing fins 51 of the heat absorbing heat sink 11 are dropped.

  A drain hole 53 is formed at the bottom of the water receiving tray 17. And the drain pipe 19 which is a drain member is inserted and connected to the drain hole 53. The drain pipe 19 extends obliquely downward, and the end of the pipe penetrates the wall surface of the housing 3 and protrudes to the outside.

  An absorbent 55 is built in the drain pipe 19. In the present embodiment, the absorbent 55 is a cotton thread (for example, a kite thread). The cotton thread comes out from the end of the drain pipe 19 and lies on the bottom surface of the water receiving tray 17. In particular, the cotton yarn does not have to be fixed to the water receiving tray 17 and does not have to be arranged in a particular shape. It is only necessary that a portion having a certain length of appropriate length comes out from the drain pipe 19 and lies on the water receiving tray 17 appropriately.

  Further, as shown in FIG. 1, the periphery of the Peltier element 5 and the cooling plate 41 is surrounded by a heat insulating plate 61 made of a heat insulating material. The cooling plate 41 has a step, and the collar portion 41a extends vertically. One surface of the heat insulating plate 61 is in contact with the flange portion 41 a of the cooling plate 41. The other surface of the heat insulating plate 61 is in contact with the heat sink 7.

  In this way, the heat insulating plate 61 is sandwiched between the cold guide plate 41 and the heat radiating heat sink 7 and surrounds the Peltier element 5 and a part of the cold guide plate 41 (part narrowed by a step). The heat insulating plate 61 thermally isolates a series of configurations including the heat absorbing heat sink 11, the cooling plate 41, the Peltier element 5, and the heat radiating heat sink 7 from the housing member 21.

  A packing 63 is provided on the further outside of the heat insulating plate 61. The packing 63 is fitted in the gap between the heat sink 7 and the housing 3.

  Among the above-described configurations, the Peltier element 5, the heat radiating heat sink 7, the cooling plate 41, and the heat insulating plate 61 are assembled to each other in advance after being assembled with each other in advance as described below.

  3 and 4 are a perspective view and an exploded view of the Peltier element part assembly 71, and the Peltier element part assembly 71 is an assembly of the Peltier element 5, the heat sink 7, the cooling plate 41, and the heat insulating plate 61. As shown in the figure, the Peltier element 5 is disposed at a substantially central portion of the base plate portion 31 of the heat sink 7. A power cord 73 is connected to the Peltier element 5. A heat insulating plate 61 is placed on the base plate portion 31 so as to surround the Peltier element 5. The Peltier element 5 is fitted into the central hole of the heat insulating plate 61. Further, the cooling plate 41 is placed on the Peltier element 5 and the heat insulating plate 61. The cooling plate 41 fits into the hole of the heat insulating plate 61 and contacts the Peltier element 5. Further, the flange portion 41 a of the cold guide plate 41 is placed on the heat insulating plate 61.

  The heat radiating heat sink 7, the Peltier element 5, the heat insulating plate 61 and the cooling plate 41 are fixed to each other by screws 75. The four screws 75 pass through the holes of the cold guide plate 41 and the heat insulating plate 61 and are tightened into the screw holes of the heat sink 7. The screw 75 is passed through a resin heat insulating collar 77 and a resin heat insulating bush 79, and is thereby thermally isolated from the cooling plate 41. Further, as shown in FIG. 3, the outer periphery of the cooling plate 41 and the corner portion of the heat insulating plate 61 are sealed with a filling adhesive 81, and the outer periphery of the heat insulating plate 61 and the corner portion of the heat sink 7 are also filled. It is sealed with an adhesive 81.

  FIG. 5 is a cross-sectional view of the Peltier element assembly 71 in a state assembled to the housing 3. The heat insulating collar 77 is passed through the hole of the heat insulating plate 61, and further fits into a part of the hole of the cold guide plate 41. The heat insulation bush 79 is fitted in the hole of the cold guide plate 41 from the side opposite to the heat insulation collar 77. The screw 75 is fastened to the heat sink 7 through the holes of the heat insulating bush 79 and the heat insulating collar 77. The flange portion of the heat insulating bush 79 is sandwiched between the head of the screw 75 and the cold guide plate 41. Therefore, the screw 75 is not in contact with the cold guide plate 41.

  Further, the screw 75 is fitted into the recess of the endothermic heat sink 11. A heat insulating cover 83 is provided at the bottom of the recess. A heat insulating cover 83 is located between the head of the screw 75 and the endothermic heat sink 11. Therefore, the screw 75 is configured not to directly contact the heat absorbing heat sink 11.

  FIG. 6 is a view of the mounting portion of the above-described Peltier element assembly 71 as viewed from the outside. A concave portion 91 is provided on the outer surface of the housing 3, and a hole 93 is provided at the bottom of the concave portion 91 (the concave portion 91 is omitted for simplification in FIGS. 1 and 2). A fan fixing plate 95 is attached to the wall surface of the recess 91. A packing 63 is laid on the bottom of the recess 91, and a Peltier element assembly 71 is assembled thereon. The Peltier element part assembly 71 is inserted into the recess 91, and the heat insulating plate 61 is fitted into the hole 93. The Peltier element assembly 71 is fixed to the housing 3 with screws 97. Eight screws 97 pass through the holes of the heat sink 7 and the packing 63 and are tightened into the screw holes of the housing 3. Furthermore, a hooded heat dissipation fan 9 is assembled from the outside. The hood 35 of the heat radiating fan 9 is put on the heat radiating heat sink 7. Then, the screw 99 is passed through the hole of the mounting plate 101 of the heat radiating fan 9 and fastened to the screw hole of the fan fixing plate 95 on the housing 3 side.

  FIG. 7 shows a cross-sectional structure of the housing 3. The casing member 21 is a stainless steel plate. A plurality of strip-shaped spacers 111 are affixed to the inside of the housing member 21 at intervals, and a wall sheet 113 is affixed on the spacers 111. Thereby, an air chamber 115 is formed between the wall sheet 113 and the housing member 21. The air chamber 115 is along the inner surface of the casing and is isolated from the inner space of the casing.

  The wall sheet 113 and the spacer 111 are made of a heat insulating transparent sheet, and more specifically are made of a polycarbonate sheet.

  The wall sheet 113 is provided on the entire inner surface of the housing member 21. That is, the entire four wall surfaces, ceiling, and floor are covered with the wall sheet 113, and therefore the air chamber 115 is also provided on the entire inner surface of the housing 3. More specifically, since the spacers 111 are arranged at appropriate intervals, a plurality of air chambers 115 are provided on the entire inner surface of the housing.

  On the other hand, the outside of the housing member 21 is covered with a heat insulating material 117. The heat insulating material 117 surrounds the entire periphery of the housing member 21. That is, the four wall surfaces, the ceiling, and the entire floor are covered with the heat insulating material 117. The heat insulating material 117 is a heat insulating sponge, more specifically a sponge of chlorobrene rubber.

  The configuration of the cooling device 1 according to the present embodiment has been described above. Next, the operation of the cooling device 1 will be described. When a current flows through the Peltier element 5, the temperature of the high temperature surface facing the outside of the housing increases, and the temperature of the low temperature surface facing the inside of the housing decreases. The heat on the hot surface is transmitted to the heat radiating heat sink 7 and released from the heat radiating fins 33. The heat radiating fan 9 sucks out air in the vicinity of the heat radiating fins 33 and promotes heat radiation by the heat radiating fins 33.

  On the other hand, on the low temperature surface side, the Peltier element 5 is in contact with the endothermic heat sink 11 via the copper cooling plate 41, and the endothermic heat sink 11 is cooled by the Peltier element 5. Then, the temperature of the endothermic fin 51 is lowered, and the air inside the housing is cooled by the endothermic fin 51.

  The pair of cool air stirring fans 13 and 15 blows along the heat absorbing fins 51 of the heat absorbing heat sink 11 and stirs the air cooled by the heat absorbing fins 51 in the housing.

  The cooling air agitation fans 13 and 15 are provided on the left and right sides of the endothermic heat sink 11. Further, the cooling air agitation fans 13 and 15 are in a position shifted vertically, that is, shifted laterally with respect to the blowing direction. The cool air stirring fan 13 blows from the left to the right in the upper half of the endothermic heat sink 11, and the cool air stirring fan 15 blows from the right to the left in the lower half of the endothermic heat sink 11, and the winds of both fans pass. . In this way, the cool air can be efficiently stirred in the entire housing by the pair of cool air stirring fans 13 and 15.

  In addition, an air chamber 115 is provided inside the entire housing 3 (wall, floor, and ceiling), and the outside is covered with a heat insulating material 117. Therefore, the entire housing is insulated and the cold air inside the housing is difficult to escape. Thereby, the cooling effect in a housing | casing is heightened.

  In this way, in the present embodiment, the heat absorption heat sink 11 and the cooling air agitation fans 13 and 15 are provided on the low temperature surface side (cooling side) of the Peltier element 5, and further, the heat insulation structure of the housing 3 is used. The cooling capacity of the Peltier element has been increased, and in this way, in the cooling device taking advantage of the downsizing of the Peltier element, the internal atmosphere temperature of the outdoor equipment placed on the road under the hot sun is kept lower than the ambient temperature. Making it possible.

  Further, when the inside of the housing is cooled, condensation occurs, and water droplets adhere to the heat absorbing fins 51 of the heat absorbing heat sink 11. In particular, when the cooling device 1 is used in an outdoor high-temperature / high-humidity environment, condensation is likely to occur. The water droplets adhering to the heat absorbing fins 51 travel along the heat absorbing heat sink 11 and drop onto the lower water receiving tray 17. Then, the water in the water receiving tray 17 is discharged through the drain pipe 19. The drain pipe 19 contains an absorbent 55 made of cotton yarn. Water soaks into the absorbent 55 at the bottom of the tray, passes through the absorbent 55, passes through the pipe, and is discharged to the outside. The absorbent 55 effectively promotes the discharge of water.

  The cooling device 1 according to the embodiment of the present invention has been described above. According to the present embodiment, the heat dissipation heat sink 7 and the heat absorption heat sink 11 are provided on both sides of the Peltier element 5, and further, the cold air agitation fans 13 and 15 for agitating the cold air in the housing by blowing air to the heat absorption heat sink 11 are provided. The heat release through the Peltier element 5 can be effectively promoted. Further, the use of the Peltier element 5 can reduce the size of the apparatus. Therefore, it is possible to provide a cooling device that is small, lightweight, inexpensive, and has a high cooling capacity.

  In particular, as compared with a configuration in which a large heat exchanger is provided in an outdoor device, the present embodiment can be significantly reduced in size and weight, the number of parts can be reduced, and the cost can be reduced.

  In the present embodiment, a plurality of cool air stirring fans 13 and 15 are arranged at both ends in the direction of the heat absorbing fins 51 with the heat absorbing heat sink 11 interposed therebetween. These cool air agitation fans 13 and 15 are arranged so as to blow air in opposite directions, and are arranged so as to be shifted laterally with respect to the air blowing direction. Thereby, the air in a housing | casing can be stirred efficiently and cooling capacity can be improved further.

  Moreover, in this Embodiment, the thermal radiation fan 9 which discharge | releases the heat | fever of the thermal radiation heat sink 7 is provided, Thereby, the thermal radiation from the thermal radiation heat sink 7 can be accelerated | stimulated and cooling capability can be improved further.

  Further, in the present embodiment, the air chamber 115 is provided along the inner surface of the housing 3 and is isolated from the housing inner space, and the outer surface of the housing 3 is covered with a heat insulating material 117, Thereby, it is possible to prevent the cool air in the housing from escaping and improve the cooling capacity.

  Further, in the present embodiment, the water receiving tray 17 is disposed below the endothermic heat sink 11, and the water draining member 19 incorporating the absorbent 55 that absorbs water is connected to the water draining hole at the bottom of the water receiving tray 17. Thereby, the water in the housing | casing produced by dew condensation can be discharged | emitted effectively. Effective drainage of water can reduce failures due to rust and migration.

  The absorbent 55 is a cotton thread, and the draining member is a pipe, which extends to the outside of the housing. Thereby, discharge of moisture can be effectively promoted with an inexpensive material.

  Thus, according to the present embodiment, it is possible to provide a cooling device that can be used outdoors or indoors in a high temperature / high humidity environment and is small, light, and inexpensive.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and it goes without saying that those skilled in the art can modify the above-described embodiments within the scope of the present invention.

  As described above, the cooling device according to the present invention has an effect that it can be reduced in size and weight, and is useful as a cooling device for outdoor equipment.

Sectional drawing of the cooling device which concerns on embodiment of this invention The perspective view of the cooling device which concerns on embodiment of this invention Perspective view of Peltier element assembly Exploded view of Peltier element assembly Cross-sectional view of cooling device including Peltier element assembly Disassembled assembly drawing of chassis, Peltier element assembly, and heat dissipation fan Diagram showing the cross-sectional structure of the housing

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cooling device 3 Case 5 Peltier element 7 Heat radiation heat sink 9 Heat radiation fan 11 Heat absorption heat sink 13, 15 Cooling air stirring fan 17 Water receiving tray 19 Drain pipe 23 Internal equipment 41 Cooling plate 51 Heat radiation fin 61 Heat insulation plate 115 Air chamber 117 Insulation

Claims (6)

A housing that houses internal devices;
A Peltier element provided in the housing;
A heat dissipation heat sink provided on the outside of the housing with respect to the Peltier element,
An endothermic heat sink provided on the inside of the housing with respect to the Peltier element, and a plurality of endothermic fins standing;
A cool air agitating fan that is provided inside the housing, blows along the heat absorbing fins of the heat absorbing heat sink, and stirs the air cooled by the heat absorbing fins in the housing;
A cooling device comprising:   A plurality of the cooling air agitation fans are arranged at both ends in the direction of the heat absorption fins across the heat absorption heat sink, and the plurality of the cooling air agitation fans are arranged to blow air in opposite directions, And the cooling device of Claim 1 arrange | positioned mutually shifted | deviated with respect to the ventilation direction.   The cooling device according to claim 1, further comprising a heat dissipating fan that releases heat of the heat dissipating heat sink.   4. The air chamber according to claim 1, further comprising an air chamber that is isolated from an inner space of the housing along the inner surface of the housing, and the outer surface of the housing is covered with a heat insulating material. The cooling device according to 1.   2. A water receiving tray is disposed below the endothermic heat sink, and a water draining member containing an absorbent that absorbs water is connected to a water draining hole at the bottom of the water receiving tray. The cooling device in any one of 4 thru | or 4.   The cooling device according to claim 5, wherein the absorbent is a cotton thread, the draining member is a pipe, and extends to the outside of the housing.

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