JP2022074220A - Cooling apparatus of electric/electronic apparatus housing box - Google Patents

Abstract

To appropriately perform a thermal exchange while forming a thin shape of a cooling apparatus of an electric/electronic apparatus housing box using a Peltier element.SOLUTION: A cooling apparatus of an electric/electronic apparatus housing box, comprises: a Peltier element 11; a first heat sink 12a bonded to a surface on one side of the Peltier element; a second heat sink 12b bonded to the surface on the other side of the Peltier element; a case 13 that surrounds any at least one of the first heat sink and the second heat sink; and a ventilation fan 14. The ventilation fan is provided on a surface structuring the case, that becomes vertical to the surface bonded to the Peltier element and the first heat sink and/or the surface bonded to the Peltier element and the second heat sink. A first open part 131 is provided to the surface opposite to the surface to which the ventilation fan of the case is attached. A second open part 132 is provided to at least one surface of a surface different from the surface to which the ventilation fan of the case is attached and in which the first open part is provided.SELECTED DRAWING: Figure 3

Description

The present invention relates to a cooling device for a box for storing electrical and electronic equipment.

It is known that a cooling device is provided in a box body in order to release heat generated from electrical and electronic devices arranged inside the box body such as a switchboard, a communication device, and a server to the outside of the box body. As a cooling device, there is also a method of ventilating and cooling the inside of the box using a louver or a ventilation fan, but when using it outdoors, waterproof and dustproof performance is required to prevent the influence of wind and rain and dust in the outside air. ing. Further, even when used indoors, it is the same as outdoors in a place where there is a lot of dust and oil mist, and the method of ventilating and cooling the inside of the box is not suitable.

Under such circumstances, an electronic cooler as in Patent Document 1 may be used as a cooling device. In an electronic cooler as in Patent Document 1, heat absorbing / radiating heat sinks are arranged on the inside and outside of the box body with a Pelche element sandwiched between them, and a joint surface between the Pelche element and the heat absorbing / radiating heat sink. It is equipped with a ventilation fan in parallel with the air conditioner, which increases the thickness of the electronic cooler and puts pressure on the storage space inside the box. Further, when used outdoors, not only the heat generated from the electric and electronic devices inside the box but also the temperature rise inside the box due to direct sunlight has become a problem. In such a case, it is known that a light-shielding plate as in Patent Document 2 is attached to the box body. If the thickness of the electronic cooler becomes large as in Patent Document 1, it may be difficult to install a light-shielding plate because it protrudes to the outside of the box.

Japanese Unexamined Patent Publication No. 2009-239168 Japanese Unexamined Patent Publication No. 10-224049

As a means for solving such a problem, it is required to reduce the thickness of the cooling device, that is, to reduce the thickness. In order to make such a cooling device, it is not preferable to arrange the ventilation fan parallel to the joint surface between the Pelche element and the heat sink. Therefore, it is conceivable to arrange the heat sink and the ventilation fan side by side in the direction perpendicular to the joint surface between the Pelche element and the heat sink. However, simply having such an arrangement does not maintain a uniform air volume, and there is a risk that the efficiency of heat exchange will decrease. In order to maintain a uniform air volume, it is conceivable to cover the heat sink with a case, but the longer the distance between the intake and exhaust, the lower the heat exchange efficiency.

The inventor of this case tried to solve this problem by diligently examining this point. An object to be solved by the present invention is to enable appropriate heat exchange in a cooling device for an electric / electronic device storage box using a Pelche element while making the cooling device thin.

In order to solve the above problems, a Pelche element, a first heat sink bonded to one surface of the Pelche element, a second heat sink bonded to the other surface of the Pelche element, and at least a first heat sink. Alternatively, it is a cooling device for an electric / electronic device storage box provided with a case surrounding any of the second heat sinks and a ventilation fan, and is a surface constituting the case, the Pelche element and the first. A ventilation fan is provided on the surface to be joined to the heat sink and / or to the surface perpendicular to the surface to be joined to the Pelche element and the second heat sink, and on the surface facing the surface to which the ventilation fan of the case is attached. An electrical and electronic equipment storage box with a first opening and a second opening on at least one side of the case that is different from the side with the ventilation fan and the side with the first opening. Use as a cooling device.

Further, the second opening is a surface constituting the case and is perpendicular to the surface where the Pelche element and the first heat sink are joined and / or the surface where the Pelche element and the second heat sink are joined. It is preferable that the configuration is prepared for a surface.

Further, it is preferable that the second opening located on one surface has a smaller opening area than the first opening.

Further, it is preferable to have a configuration having a plurality of surfaces provided with the second opening.

Further, it is preferable that the second openings provided on the facing surfaces of the case are positioned symmetrically with respect to the line extending in the direction in which the ventilation fan and the first opening are arranged.

Further, it is preferable that the second opening is arranged at a position closer to the leeward side of the air passage flowing between the first opening and the ventilation fan.

In the present invention, in a cooling device for an electric / electronic device storage box using a Pelche element, heat exchange can be appropriately performed while making the cooling device thin.

It is a conceptual diagram which shows the example which attached the cooling device in embodiment to the electric electronic device storage box. However, in the air before heat exchange and the air after heat exchange, the air flow on the warm side is indicated by a black arrow, and the air flow on the cold side is indicated by a white arrow. Further, the direction of the surface perpendicular to the surface where the Pelce element and the first heat sink are joined and / or the surface where the Pelche element and the second heat sink are joined is represented by a alternate long and short dash line. It is a perspective view which shows the example of the cooling unit provided in the cooling device. However, the direction of the surface perpendicular to the surface where the Pelche element and the first heat sink are joined and / or the surface where the Pelche element and the second heat sink are joined is represented by a alternate long and short dash line. It is an exploded perspective view of the cooling unit shown in FIG. However, the direction of the surface perpendicular to the surface where the Pelche element and the first heat sink are joined and / or the surface where the Pelche element and the second heat sink are joined is represented by a alternate long and short dash line. It is an exploded perspective view of the heat dissipation unit used in the cooling unit shown in FIG. It is a perspective view of the heat dissipation unit part of the cooling unit shown in FIG. It is a side view of the heat dissipation unit shown in FIG. FIG. 5 is a cross-sectional view taken along the line VII-VII of FIG. It is a figure which shows the example which arranged the 2nd opening close to 1st opening. It is a figure which shows the example which the 2nd opening is located on both the 1st opening side and the ventilation fan side. It is a figure which shows the example which made it possible to reduce the thickness only in the portion which is located inside the housing. It is a figure which shows the example which made it possible to reduce the thickness only in the portion which is located on the outside of a housing. It is a figure which shows the example in which the ventilation fan used for a heat dissipation unit and the ventilation fan used for a heat absorption unit are arranged in a non-parallel arrangement. This is an example in which a second opening is provided on a surface parallel to the base. However, the second opening is arranged closer to the first opening. This is an example in which a second opening is provided on a surface parallel to the base. However, the second opening is located closer to the ventilation fan. This is an example in which a second opening is provided on a surface parallel to the base. However, a plurality of second openings are arranged.

The embodiment for carrying out the invention is shown below. As can be understood from FIGS. 1 to 5, the cooling device 1 of the electric / electronic device storage box 8 of the present embodiment is joined to the Pelche element 11 and one surface of the Pelche element 11. A first heat sink 12a to be formed, a second heat sink 12b joined to the other surface of the Pelche element 11, a case 13 surrounding at least one of the first heat sink 12a or the second heat sink 12b, and ventilation. It is equipped with a fan 14. Further, the cooling device 1 of the electric / electronic device storage box 8 is a surface constituting the case 13, and is a surface at which the Pelche element 11 and the first heat sink 12a are joined and / or the Pelche element 11 and the second. The ventilation fan 14 is provided on the surface perpendicular to the surface to be joined to the heat sink 12b, and the first opening 131 is provided on the surface of the case 13 facing the surface to which the ventilation fan 14 is attached. The second opening 132 is provided on at least one surface different from the surface on which the ventilation fan 14 is attached and the surface on which the first opening 131 is provided. Therefore, in the cooling device 1 of the electric / electronic device storage box 8 using the Pelche element 11, it is possible to appropriately perform heat exchange while making the cooling device 1 thin.

The cooling device 1 of the electric / electronic device storage box 8 of the embodiment is a device attached to one side surface of the fixedly installed electric / electronic device storage box 8 to cool the inside of the box body 81. In the example shown in FIG. 1, the cooling device 1 is attached to the ceiling surface of the electric / electronic device storage box 8. The cooling device 1 includes a cooling unit using the Pelche element 11.

The cooling unit of the embodiment is composed of a Pelche element 11, a heat dissipation unit 101, and a heat absorption unit 102, and the heat dissipation unit 101 is bonded to the heat generation surface of the Pelche element 11 and the heat absorption unit 102 is bonded to the heat absorption surface of the Pelche element 11. .. When the cooling device 1 is attached to the electric / electronic device storage box 8, the portion of the heat dissipation unit 101 is arranged on the outside of the box body 81, and the portion of the heat absorption unit 102 is arranged on the inside of the box body 81. By doing so, the inside of the box body 81 can be cooled by using the cooling device 1.

Next, the heat dissipation unit 101 and the heat absorption unit 102 will be described. The heat dissipation unit 101 and the heat absorption unit 102 provided in the cooling device 1 shown in FIG. 2 have basically the same configuration. Therefore, the most characteristic part of the present invention will be described by taking the heat dissipation unit 101 in FIG. 2 as an example.

As can be seen from FIGS. 3 and 4, the heat sink 12 bonded to the Pelche element 11 includes a base 121 bonded to the Pelche element 11 and a plurality of fins 122 extending from the base 121. The fin 122 in the embodiment is a rod-shaped pin fin, but may have a shape different from that of the pin fin, such as a plate-shaped straight fin.

As the heat sink 12 used in the cooling device 1, the first heat sink 12a bonded to one side surface of the Pelche element 11 and the second heat sink 12b bonded to the other side surface of the Pelche element 11 are clearly defined. Although distinguished, in the embodiment, the heat sink 12 on the heat dissipation unit 101 side is the first heat sink 12a, and the second heat sink 12b joined to the surface on the heat absorption unit 102 side.

In the embodiment, the case 13 is arranged so as to surround the heat sink 12. In this case 13, the surface of the heat sink 12 excluding the base 121 is generally surrounded by the case 13. Although the case 13 is configured to have a plurality of surfaces on the outer shell, both the surface where the Pelche element 11 and the first heat sink 12a are joined and the surface where the Pelche element 11 and the second heat sink 12b are joined are formed. A ventilation fan 14 is provided on a surface perpendicular to the surface. In other words, the surface perpendicular to the Pelche element 11 of the case 13 or one surface perpendicular to the base 121 is used as the mounting surface of the ventilation fan 14.

The case 13 of the embodiment is provided with a first opening 131 on a surface facing the mounting surface of the ventilation fan 14. As can be understood from FIG. 5, in the embodiment, the entire surface facing the mounting surface of the ventilation fan 14 is opened to form the first opening 131. Further, the ventilation fan 14 of the embodiment is a fan that takes in air from the heat sink 12 side.

Generally, the case 13 surrounding the heat sink 12 is not essential in terms of function. However, by providing the case 13, it is possible to suppress a decrease in the air volume in a portion away from the ventilation fan 14 due to a large amount of intake air being taken from near the ventilation fan 14. It is possible to suppress the problem that a constant air volume cannot be maintained in the entire heat sink 12 and the heat exchange efficiency is lowered.

In the embodiment, since the ventilation fan 14 takes in air from the heat sink 12, the air taken in from the first opening 131 of the case 13 passes so as to come into contact with the plurality of fins 122 provided in the heat sink 12. Then, it is discharged from the ventilation fan 14. As can be understood from FIGS. 3 to 7, the case 13 in the embodiment has approximately the same size as the heat sink 12, and is between the air moving in the case 13 and the heat sink 12. It enables efficient heat transfer.

By the way, when the case 13 is provided with only the first opening 131, there is a problem that the heat exchange efficiency decreases as it goes to the leeward side in the air passage flowing between the first opening 131 and the ventilation fan 14. For example, in the heat dissipation unit 101, the outside air taken in from the first opening 131 is warmed as it passes through the heat sink 12 joined to the heat generating surface of the Pelche element 11 and is exhausted from the ventilation fan 14, but passes as it goes downwind. Since the temperature of the outside air rises, there may be a problem that sufficient heat exchange cannot be performed.

Therefore, the case 13 of the embodiment is provided with the second opening 132 on a surface different from the mounting surface of the ventilation fan 14 and the surface on which the first opening 131 is formed. By forming the second opening 132 at such a position, outside air can be taken in the middle of the air passage flowing between the first opening 131 and the ventilation fan 14, and the heat exchange efficiency can be maintained. Can be done.

The second opening 132 of the embodiment has a shape in which a plurality of elongated holes are arranged, that is, a form like an aggregate of slits, but various other ones can be used. For example, the opening may have a size corresponding to an aggregate of a plurality of holes in the embodiment. Further, various shapes of holes can be adopted.

By the way, in the example shown in FIG. 3, the second opening 132 is a surface constituting the case 13, a surface where the Pelche element 11 and the first heat sink 12a are joined, and the Pelche element 11 and the second heat sink. It is provided on a surface that is perpendicular to both of the surfaces to be joined to the 12b, in other words, a surface that extends in the direction in which the first heat sink 12a and the second heat sink 12b are aligned. By providing the second opening 132 on such a surface, the second opening 132 can be arranged in the vicinity of the base 121 to be joined to the heat generating surface of the Pelche element 11, and heat exchange can be effectively performed. can.

For example, when the second opening 132 is formed on a surface parallel to the Pelche element 11 of the case 13, the outside air taken in from the second opening 132 easily passes through the tip end side of the heat sink 12 and is easily exhausted. There is a possibility that heat accumulation is likely to occur on the base 121 side of the heat sink 12, but when the second opening 132 is formed on the surface perpendicular to the Pelche element 11, the heat sink 12 is from the base 121 side to the tip side. Since the second opening 132 can be formed, the heat sink 12 can be dispersed in the length direction of the fins 122 to take in heat, and effective heat exchange can be performed so that heat accumulation is unlikely to occur. Can be done.

Further, a surface constituting the case 13 that is perpendicular to the surface where the Pelche element 11 and the first heat sink 12a are joined and / or the surface where the Pelche element 11 and the second heat sink 12b are joined. In the direction perpendicular to the surface where the Pelche element 11 and the first heat sink 12a are joined and / or the surface where the Pelche element 11 and the second heat sink 12b are joined, rather than the central portion. If at least a part of the second opening 132 is located on the Pelche element 11 side, it becomes easier to cool the base 121 side of the heat sink 12.

In addition, on the surface perpendicular to the surface where the Pelche element 11 and the first heat sink 12a are joined and / or the surface where the Pelche element 11 and the second heat sink 12b are joined, the Pelche element 11 and the first surface are the same. The Pelche element 11 side and the anti-Pelche element 11 from the central portion when viewed in a direction perpendicular to the surface to be joined to the one heat sink 12a and / or the surface to be joined to the Pelche element 11 and the second heat sink 12b. If at least a part of the second opening 132 is located on both sides, the air introduced into the case 13 can be dispersed over a relatively wide range in the case 13.

By the way, when the opening area of the second opening 132 located closer to the ventilation fan 14 than the first opening 131 becomes larger, the air is sucked from the second opening 132 depending on the conditions such as the ventilation fan 14. The air volume increases. As a result, the air volume on the first opening 131 side decreases, so that the efficiency of heat exchange decreases, and there is a possibility that heat pools will occur on the first opening 131 side. Therefore, it is preferable that the second opening 132 located on one surface of the case 13 has a smaller opening area than the first opening 131. By making the opening area of the second opening 132 provided on one surface such a size, it is possible to maintain the air volume of the air passage flowing from the first opening 131 toward the ventilation fan 14.

It is not essential that the opening area of the second opening 132 is such a thing, and if the opening area of the second opening 132 located on one surface is not too large, the first opening While keeping the air volume from the portion 131 constant, air can be taken in from the second opening 132, and heat can be exchanged effectively.

Further, it is preferable to have a configuration having a plurality of surfaces provided with the second opening 132. This is because it is possible to consider the balance of the direction of air in and out. In particular, the second openings 132 provided on the facing surfaces of the case 13 are positioned so as to be symmetrical with respect to the line extending in the direction in which the ventilation fan 14 and the first opening 131 are aligned. Is preferable. By arranging the second opening 132 so as to be symmetrical with respect to the air passage, it is possible to take in air from the second opening 132 in a well-balanced manner, and it can be expected that a uniform wind is provided to the entire heat sink 12.

Further, it is preferable to arrange the second opening 132 at a position closer to the leeward side of the air passage flowing between the first opening 131 and the ventilation fan 14. For example, in the heat dissipation unit 101, when the outside air taken in from the first opening 131 passes through the heat sink 12 and the air is warmed, the heat exchange efficiency decreases on the ventilation fan 14 side, but the second opening on the leeward side. If the outside air is also taken in from the portion 132, it can contribute to heat exchange on the leeward side. Therefore, heat exchange can be effectively performed in the entire heat sink 12.

The second opening 132 is not limited to being arranged at a position closer to the leeward side of the air passage flowing between the first opening 131 and the ventilation fan 14, but the first opening 131 and the ventilation fan are not limited to the second opening 132. It may be arranged at a position closer to the windward side of the air passage flowing between 14 and 14. For example, if the ventilation fan 14 takes in air from the heat sink 12, it can be exemplified that the ventilation fan 14 is arranged at the position shown in FIG. Further, the second opening 132 may be arranged on both the windward side and the leeward side of the air passage flowing between the first opening 131 and the ventilation fan 14. For example, if the ventilation fan 14 takes in air from the heat sink 12, it can be exemplified that the ventilation fan 14 is arranged at the position shown in FIG. Even in these cases, the efficiency of heat exchange can be sufficiently ensured depending on the performance of the ventilation fan 14.

By the way, in the example shown in FIG. 2, both the endothermic unit 102 and the heat dissipation unit 101 have the same configuration. Therefore, both the heat absorbing unit 102 and the heat radiating unit 101 are surfaces constituting the case 13, and are surfaces for joining the Pelche element 11 and the first heat sink 12a and a surface for joining the Pelche element 11 and the second heat sink 12b. A ventilation fan 14 is provided on a surface perpendicular to both of the above, a first opening 131 is provided on a surface facing the surface of the case 13 to which the ventilation fan 14 is attached, and the ventilation fan 14 of the case 13 is provided. The second opening 132 is provided on at least one surface different from the mounted surface and the surface with the first opening 131. With such a configuration, since the cooling device 1 can be made thin as a whole, the protrusion of the box body 81 to the inside and the outside can be reduced, and the heat exchange efficiency can be maintained while maintaining a uniform air volume. Is preferable because it can be performed appropriately.

On the other hand, as can be understood from FIGS. 10 and 11, only one of the heat dissipation unit 101 and the endothermic unit 102 may have the above-described configuration. Even in this case, the above-mentioned merits can be enjoyed for either the heat dissipation unit 101 side or the heat absorption unit 102 side. That is, if it is desired to secure only the space inside the box body 81, the heat absorbing unit 102 may be made thin, and the heat radiating unit 101 may be configured with the cooling device 1 as a conventional structure. Further, when it is desired to secure only the space outside the box body 81, the heat dissipation unit 101 can be made thin, and the endothermic unit 102 can be configured as a cooling device 1 as a conventional structure.

By the way, in the example shown in FIG. 2, the ventilation fan 14 provided in the heat dissipation unit 101 and the ventilation fan 14 provided in the endothermic unit 102 are arranged in parallel, but it is understood from the fact shown in FIG. They may be arranged in a non-parallel manner, as is done. In this case, the exhaust directions may be opposite or the same. In the example shown in FIG. 12, the exhaust directions are opposite to each other.

By the way, in the example shown in FIG. 2, the second opening 132 is a surface constituting the case 13, a surface where the Pelche element 11 and the first heat sink 12a are joined, and the Pelche element 11 and the second heat sink 12b. Although it is provided on a surface that is perpendicular to both of the surfaces to be joined to, it is not necessary to be limited to such an embodiment. As can be understood from FIGS. 13 to 15, the surface constituting the case 13 where the Pelche element 11 and the first heat sink 12a are joined and / or the Pelche element 11 and the second heat sink. It may be provided on a surface extending in a direction perpendicular to a surface perpendicular to the surface to be joined with 12b. However, in this case, as described above, it may be difficult for air to flow to the base 121 side. Therefore, by devising the shape of the fin 122 and the arrangement of the baffle plate, the air can easily flow to the base 121 side as well. Is preferable.

With respect to the surface constituting the case 13, which is perpendicular to the surface where the Pelche element 11 and the first heat sink 12a are joined and / or the surface where the Pelche element 11 and the second heat sink 12b are joined. When the second opening 132 is provided on the surface extending in the intersecting direction, as shown in FIG. 13, the second opening 132 is arranged at a position closer to the windward side of the air passage flowing between the first opening 131 and the ventilation fan 14. Or, as shown in FIG. 14, it may be arranged at a position closer to the leeward side of the air passage flowing between the first opening 131 and the ventilation fan 14. Further, as shown in FIG. 15, a plurality of second openings 132 may be provided on one surface.

Although the present invention has been described above by taking an embodiment as an example, the present invention is not limited to the above embodiment and can be various modes. For example, the wind direction of the ventilation fan 14 can be reversed.

1 Cooling device 8 Electrical and electronic equipment storage box 11 Pelche element 12 Heat sink 12a First heat sink 12b Second heat sink 13 Case 14 Ventilation fan 131 First opening 132 Second opening

Claims (6)

A Pelche element, a first heat sink bonded to one surface of the Pelche element, a second heat sink bonded to the other surface of the Pelche element, and at least either the first heat sink or the second heat sink. A cooling device for an electric / electronic device storage box including a case surrounding the case and a ventilation fan, which is a surface constituting the case, a surface at which the Pelche element and the first heat sink are joined, and a surface. / Or a ventilation fan on the surface perpendicular to the surface where the Pelche element and the second heatsink join, and a first opening on the surface of the case facing the surface on which the ventilation fan is mounted. A cooling device for an electrical and electronic equipment storage box having a second opening on at least one surface different from the surface on which the ventilation fan of the case is attached and the surface having the first opening. The second opening is a surface constituting the case, which is perpendicular to the surface where the Perche element and the first heat sink are joined and / or the surface where the Perche element and the second heat sink are joined. The cooling device for an electric / electronic device storage box according to claim 1. The cooling device for an electrical / electronic device storage box according to claim 1 or 2, wherein the second opening located on one surface has an opening area smaller than that of the first opening. The cooling device for an electrical / electronic device storage box according to any one of claims 1 to 3, further comprising a plurality of surfaces provided with a second opening. The electrical and electronic device storage according to claim 4, wherein the second openings provided on the opposite surfaces of the case are located so as to be symmetrical with respect to the line extending in the direction in which the ventilation fan and the first opening are arranged. Box cooling device. The cooling of the electric / electronic device storage box according to any one of claims 1 to 5, wherein the second opening is arranged at a position closer to the leeward side of the air passage flowing between the first opening and the ventilation fan. Device.

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