JPH10227554A - Cooling apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cooling apparatus which can reduce the thickness in a cross direction without increasing the manufacturing cost for bending, and can make an uniform distribution of the wind velocity in a longitudinal direction. SOLUTION: A cooling tank 3a consists of two or more heat receiving pipes and is arranged facing the lower side of a blower 34. A radiator 3b comprises a radiating pipe and is arranged by being shifted to the side of the lower side blower relative to the cooling tank 3a. The upper side blower 31 is arranged facing the opposite side of the lower side lower 34 of the radiator 3b. Therefore, the thickness in a cross direction can be reduced, and the distribution of the wind velocity in a longitudinal direction can be made uniform. A high-temperature side communicating pipe, 9a and a low-temperature side communicating pipe 9b both of which communicate with the heat receiving pipe of the cooling tank 3a to the radiating pipe of the radiator 3b, are bent halfway. However, the total number of the high-temperature side communicating pipe 9a and the low-temperature side communicating pipe 9b is two, which is fewer than the number of the heat receiving pipe and radiating pipe, so that the manufacturing cost for bending is not increased as compared with a conventional heat pipe type.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for cooling a high-temperature fluid in a casing whose inside is sealed from the outside by exchanging heat with a low-temperature fluid outside the casing. As an application of the cooling device, for example, there is a device for cooling a relay base station for a mobile phone.

[0002]

2. Description of the Related Art Heretofore, there has been a case where a heating element such as an electronic component is used by being housed in a sealed housing (housing). In this case, as a method of cooling the heating element, a cooling device that exchanges heat between the air inside the housing and the air outside the housing is known because it is not possible to directly take in outside air into the housing and perform ventilation. .

[0003] Examples of such a cooling device include those disclosed in Japanese Patent Publication No. 2-3320 and Japanese Patent Publication No. 4-70800. In these, a heat exchanger composed of a heat pipe is arranged adjacent to the side wall of the housing, and a lower portion of the heat pipe is arranged in a high temperature part communicated with the inside of the housing to receive heat, and a low temperature is communicated outside the housing. By arranging the upper part of the heat pipe in the portion and radiating heat from the upper part of the heat pipe, the inside of the housing is cooled.

[0004]

In the heat pipe type heat exchanger disclosed in Japanese Patent Publication No. 2-3320, an upper fan is arranged above the upper end of the heat pipe, and the lower fan is arranged below the lower end. By arranging the fan, there is an effect that the thickness in the width direction can be reduced. However, the heat pipe type heat exchanger disclosed in the publication can reduce the thickness in the lateral direction, but has a disadvantage that the wind speed distribution in the length direction of the heat pipe becomes uneven and the cooling efficiency decreases.

On the other hand, in a heat pipe type heat exchanger disclosed in Japanese Patent Publication No. 4-70800, an upper fan is arranged opposite to an upper part of a heat pipe, and a lower fan is arranged at a lower part on the opposite side to the upper fan. , The wind speed distribution in the length direction of the heat pipe is made uniform, and a decrease in cooling efficiency can be prevented. However, while the heat pipe type heat exchanger disclosed in the publication can make the wind speed distribution in the length direction of the heat pipe uniform, the thickness in the lateral direction (from the outermost position of the upper fan to the outermost position of the lower fan) Distance).

Therefore, in the heat pipe type heat exchanger disclosed in Japanese Patent Publication No. 4-70800, the lateral position between the outermost position of the upper fan and the lower end of the heat pipe opposite to the lower fan is determined. It is conceivable to bend the vicinity of the center of the heat pipe so that the outermost position of the lower fan and the upper end of the upper portion of the heat pipe opposite to the upper fan coincide with each other. However, in this case, when the heat radiation amount is small and the number of heat pipes is small, it is good. However, when the heat radiation amount is large and the number of heat pipes is large, there is a problem that the manufacturing cost for bending increases.

The present invention has been made based on the above circumstances, and a first object of the present invention is to provide a cooling device capable of reducing the thickness in the lateral direction and at the same time uniforming the wind speed distribution in the longitudinal direction. It is. A second object is to provide a cooling device that can prevent an increase in manufacturing cost for bending even when the amount of heat radiation increases.

[0008] A third object is to provide a cooling device that can simultaneously achieve the first and second objects.

[0009]

According to the first aspect of the present invention, the high temperature side heat exchanger (3a) includes a plurality of tubular members (4).
a) and is arranged to face the high-temperature side blower (34). The low-temperature side heat exchanger (3b) is composed of a tubular member (4b) and is arranged above the high-temperature side heat exchanger so as to be shifted toward the high-temperature side blower with respect to the high-temperature side heat exchanger. The low-temperature side blower (31) is disposed above the high-temperature side heat exchanger and opposite to the low-temperature side heat exchanger on the side opposite to the high-temperature side blower.
Thereby, the thickness in the lateral direction can be reduced, and the wind speed distribution in the length direction can be made uniform. A communication pipe (9a, 9b) for communicating the tubular member of the high-temperature side heat exchanger with the tubular member of the low-temperature side heat exchanger is provided between the one side and the other side with respect to the high-temperature side heat exchanger and the high-temperature side blower. It is bent to the side. Here, since the communication pipe is composed of a smaller number of tubular members (9a, 9b) than the number of tubular members of the high-temperature side heat exchanger and the number of tubular members of the low-temperature side heat exchanger, the manufacturing cost for bending is increased. Can be prevented.

According to the second aspect of the present invention, the plurality of tubular members in the high-temperature side heat exchanger are arranged on the first plane, and the plurality of tubular members in the low-temperature side heat exchanger are connected to the first plane. They are arranged on a second plane that is parallel and different from the first plane. Since the high-temperature side blower is disposed on the second plane side of the first plane and substantially parallel to the first plane, the wind speed distribution in the longitudinal direction of the high-temperature side heat exchanger can be made uniform. And the low-temperature side blower is more than the second plane,
Is disposed substantially parallel to the second plane, so that the wind speed distribution in the longitudinal direction of the low-temperature side heat exchanger can be made uniform. Thus, the thickness in the lateral direction can be reduced, and the wind speed distribution in the longitudinal direction can be made uniform.

According to the third aspect of the present invention, since the fluid separator is inclined with respect to the high-temperature side heat exchanger and the low-temperature side heat exchanger, the fluid mixed with the low-temperature part simultaneously with the low-temperature fluid. It can be dripped quickly below the fluid separator. Thereby, the reliability at the penetrating portion between the communication pipe and the fluid separator can be improved. Further, since the communication pipe is penetrated substantially perpendicularly to the fluid separator, the reliability at the penetrating portion between the communication pipe and the fluid separator can also be improved.

According to the fourth aspect of the present invention, the communication pipe is
One high-temperature side communication pipe connected to the high-temperature upper communication part and the other connected to the low-temperature upper communication part, and one low-temperature side connected to the high-temperature lower communication part and the other connected to the low-temperature lower communication part In order to improve the heat radiation characteristics, since the communication pipe is provided, and the high-temperature communication pipe and the low-temperature communication pipe are bent toward the high-temperature blower with respect to the high-temperature heat exchanger between one and the other, Even if the number of tubular members of the high-temperature side heat exchanger and the low-temperature side heat exchanger is increased, it is possible to prevent an increase in manufacturing cost for bending the communication pipe.

According to the fifth aspect of the present invention, the high-temperature side heat exchanger (3a) is a flat heat receiver having a ventilation hole through which a high-temperature fluid flows, and the low-temperature side heat exchanger (3b) is a high-temperature heat exchanger (3b). A flat radiator having a ventilation hole through which a low-temperature fluid flows is disposed at an upper portion of the side heat exchanger so as to be displaced from the high temperature side heat exchanger. Here, the high-temperature side heat exchanger is shifted to the low-temperature side blower, the low-temperature side heat exchanger is shifted to the high-temperature side blower, and the low-temperature side blower is shifted from the anti-high-temperature side heat exchanger side end of the high-temperature side blower. The distance to the anti-low-temperature heat exchanger side end is set smaller than the total thickness of one of the thicker of the high-temperature heat exchanger and the low-temperature heat exchanger, the high-temperature fan and the low-temperature fan. You. The communication pipe that communicates the high-temperature side heat exchanger and the low-temperature side heat exchanger has an internal cross-sectional area smaller than any of the internal cross-sectional area of the high-temperature side heat exchanger and the internal cross-sectional area of the low-temperature side heat exchanger. It consists of a tubular member. Thereby, the thickness in the lateral direction can be reduced, and the wind speed distribution in the length direction can be made uniform. In addition, it is possible to prevent the processing cost of the communication pipe from increasing.

According to the sixth aspect of the present invention, the suction port of the high-temperature side blower is disposed on the high-temperature side heat exchanger side, and the suction port of the low-temperature side blower is disposed on the low-temperature side heat exchanger side. The low-temperature fluid is allowed to flow in opposition. This allows
The flow of the fluid at the suction part of each blower is rectified, the blowing resistance is reduced, and the generation of noise is suppressed. This allows
The distance between the high-temperature side heat exchanger and the high-temperature side blower and the distance between the low-temperature side heat exchanger and the low-temperature side blower can be reduced. As a result, the thickness in the lateral direction can be reduced, and the wind speed distribution in the longitudinal direction of the high-temperature side heat exchanger and the low-temperature side heat exchanger can be made uniform.

According to the seventh aspect of the present invention, the other of the communication pipes is disposed so as to be shifted to the low-temperature side heat exchanger side with respect to the vertical direction of one of the communication pipes. it can. According to the invention described in claim 8,
A high-temperature-side heat exchanger is arranged as a high-temperature portion where a high-temperature fluid that is divided by a part of the housing and is heated by the heat of the electric device and is circulated by the high-temperature blower is disposed. The low-temperature-side heat exchanger is disposed with the region isolated from the low-temperature portion as the low-temperature portion. When the cooling device having the high-temperature heat exchanger and the low-temperature heat exchanger is configured as described in any one of claims 1 to 7, heat can be efficiently radiated inside the housing, and the housing of the cooling device can be efficiently used. The area occupied in the body can be reduced.

According to the ninth aspect of the present invention, the high temperature side heat exchanger, the low temperature side heat exchanger, the high temperature side blower and the low temperature side blower are arranged such that the housing is substantially parallel to the front surface on the side where the high temperature portion is partitioned. Since they are arranged, the area occupied by the cooling device in the housing can be reduced. According to the tenth aspect, the width of the high-temperature side heat exchanger in the direction in which the tubular members are stacked is substantially the same as the width in the direction in which the tubular members of the low-temperature side heat exchanger are stacked, and The heat exchanger and the low-temperature side heat exchanger are arranged so as to be shifted from each other in the lateral width direction. Since the ends in the width direction of the high-temperature side heat exchanger and the low-temperature side heat exchanger are shifted, a position shift portion occurs. By arranging the high-temperature side communication pipe at the position shift part of the low-temperature side heat exchanger and arranging the low-temperature side communication pipe at the position shift part of the high-temperature side heat exchanger, the overall width of the cooling device can be reduced.

According to the eleventh aspect of the present invention, at least one of the high-temperature side blower and the low-temperature side blower is a centrifugal blower, and the center of the suction port is a centrifugal fan in the high-temperature side heat exchanger and the low-temperature side heat exchanger. It is arranged so as to face one center facing the blower. Thereby, the wind speed distribution in one length direction and the lateral direction facing the centrifugal blower can be made uniform.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a cooling device according to the present invention will be described with reference to the drawings. 1 to 5
Shows an embodiment in which the cooling device 25 of the present invention is applied to the electronic device 1 as a housing cooling device.
FIG. 1 is a view showing the overall structure of the electronic apparatus 1, and FIG.
Is a plan view as viewed from the outside, that is, from the left side of the drawing.

In FIG. 1 and FIG. 2, the electronic equipment 1
For example, a wireless base station device of a mobile wireless phone such as a mobile phone or a car phone, which has a housing 13 in which an electronic component 11 is airtightly accommodated, and a cooling device incorporated in the housing 13 to cool the electronic component 11 It comprises a device 25, a boiling cooling device 3 housed in the cooling device 25, an upper blower 31, a lower blower 34 and the like.

The electronic component 11 performs a predetermined operation when electricity flows, generates heat (for example, a semiconductor switching element constituting a high-frequency switching circuit incorporated in a transceiver) and generates a predetermined operation when electricity flows. And a heating element (for example, a semiconductor amplifying element such as a power transistor incorporated in a power amplifier) that generates heat.

The housing 13 is a housing for hermetically sealing the inside from the outside, and has a sealed space 16 formed therein. The sealed space 16 is provided with a cooling device 25 to be described later in order to prevent the performance of the electronic component 11 from being deteriorated due to foreign substances such as dust, dust, and moisture adhering to the electronic component 11.
Is airtightly partitioned from the outside by the fluid separator 2.

The closed space 16 is provided with a casing 20.
Is partitioned from the high-temperature side heat transfer space 17 of the cooling device 25 by the rear side partition plate 27. This high temperature side heat transfer space 1
7 has a narrow flow path area on the windward side in order to make the depth dimension of the boiling cooling device 3 as small as possible, and a flow path area on the leeward side is larger than the windward side. The cooling device 25 includes a casing 20 provided integrally with the housing 13, and a high-temperature side heat transfer space 17 inside the casing 20 as a passage in the casing.
By transferring the heat of the fluid separating plate 2 and the high-temperature side heat transfer space 17 to the low-temperature side heat transfer space 18 and the low-temperature side heat transfer space 18 serving as a passage outside the casing, the air temperature in the closed space 16 is reduced. A boiling cooling device 3 for lowering the temperature to an upper limit temperature (for example, 70 ° C.) or lower; two upper-side blowers 31 for generating an air flow of low-temperature air (external fluid, low-temperature fluid) in the low-temperature heat transfer space 17; Two lower-side blowers 34 for generating an airflow of high-temperature air (internal fluid, high-temperature fluid) in the heat space 18, and an electric heater (for setting the air temperature in the closed space 16 to a minimum temperature (for example, 0 ° C.) or more) (Not shown), and upper and lower blowers 31, 34 and a controller 24 for controlling the energization of the electric heater.

The casing 20 includes a rear partition plate 27 for separating the closed space 16 and the high-temperature heat transfer space 17 of the electronic device 1, a high-temperature suction port 27 a opened at an upper part of the rear partition plate 27, A high-temperature side discharge port 27b opened at a lower portion of the side partition plate 27, an outer wall plate 26 arranged on the outermost side of the electronic apparatus 1, a low-temperature side suction port 26a opened at a lower portion of the outer wall plate 26, and an outer wall plate 26. Formed below the low-temperature side discharge port 26b and the low-temperature side suction port 26a that are opened at the top,
The maintenance hatch 28 is detachable. The outer wall plate 26 and the rear partition plate 27 are fixed to the housing 13 by joining such as spot welding or by fastening with fasteners such as screws or bolts.

The fluid separator 2 is formed on one wall surface of the housing 13 (part of the housing), which forms one wall surface of the sealed space 16 whose inside becomes high temperature and one wall surface of the low-temperature side heat transfer space 18 whose inside becomes low temperature. ). For example, a closed space 16 including a high-temperature-side heat transfer space 17 and a low-temperature-side heat transfer space 1 made of a thin plate made of a metal material having excellent heat conductivity such as aluminum.
8 is airtightly joined (e.g., brazed, sealed with a sealing agent) to the boiling cooling device 3 and the casing 20 so as to airtightly partition the outside including the airtightness 8. Also, the fluid separator 2
Are inclined with respect to the rear partition plate 27, the refrigerant tank 3a, the radiator 3b, the lower blower 34, and the upper blower 31. The fluid separating plate 2 has a plurality of insertion holes through which a low-temperature communication pipe 9b and a high-temperature communication pipe 9a to be described later pass. Note that a resin such as rubber for suppressing heat transfer may be interposed between the fluid separator 2 and each communication pipe. The fluid separator 2 may be insulated from the surroundings (at least one of a low-temperature fluid and a high-temperature fluid) with a heat insulating material made of a foamable resin such as urethane foam.

Next, the boiling cooling device 3 will be described in detail with reference to FIGS. Here, FIG. 3 is a plan view of the boiling cooling device 3, and FIG. 4 is a side view of the boiling cooling device 3 in FIG. The boiling cooling device 3 is configured in a multi-stage (three-stage) in the flow direction of the high-temperature fluid and the low-temperature fluid (or in the direction perpendicular to the rear partition plate) while penetrating the fluid separator 2.

As shown in FIGS. 3 and 4, each of the boiling cooling devices 3 includes a plurality of heat receiving tubes 4a (tubular members of the high-temperature side heat exchanger) disposed on the high-temperature fluid side with respect to the fluid separator 2. A refrigerant tank 3a as a high-temperature side heat exchanger, a refrigerant which is sealed in a heat receiving pipe 4a, receives heat from a high-temperature fluid, and evaporates.
One is air-tightly connected to the refrigerant tank 3a, and the other is a pair of low-temperature side communication pipes 9b and high-temperature side communication pipes 9a, 9b, and high-temperature side which extend through the fluid separator 2 and extend to the low-temperature fluid side. Dissipating heat as a low-temperature heat exchanger composed of a plurality of heat-radiating tubes 4b (tubular members of the low-temperature heat exchanger) that are air-tightly communicated with the other end of the communication tube 9a and that are disposed on the low-temperature fluid side with respect to the fluid separator 2. It has a vessel 3b.

Further, the evaporative cooling device 3 includes a heat receiving fin 6a and a radiator 3b joined in a state of being fused (for example, brazed) between the respective heat receiving tubes 4a of the refrigerant tank 3a.
Radiating fins 6b joined in a state of being fused (for example, brazed) between the respective radiating tubes 4b, between the refrigerant tank 3a and the low-temperature side communication tube 9b, and with the radiator 3b and the low temperature side communication. A heat insulating material (not shown) as a heat conduction suppressing means which is buried between the pipe 9a and the heat transfer from the refrigerant tank 3a to the low temperature side communication pipe 9b and the heat transfer from the radiator 3b to the high temperature side communication pipe 9a. (For example, urethane foam which is a foamable resin).

The refrigerant tank 3a is located below the radiator 3b and is displaced (displaced) toward the upper fan 34 (right side in FIG. 1) with respect to the radiator 3b. . The refrigerant tank 3a is provided below a plurality of heat receiving tubes 4a as a plurality of tubular members arranged on a predetermined plane (first plane) substantially parallel to the rear side partition plate 27, A high-temperature side lower tank 42a as a high-temperature side lower communication portion that connects the heat receiving tubes 4a below, and a high-temperature side upper communication portion that is disposed above the heat receiving tubes 4a and communicates the heat receiving tubes 4a upward. A flat heat receiver comprising the high temperature side upper tank 41a is constructed. The heat receiving tube 4a is formed by forming a metal material having excellent heat conductivity (for example, aluminum or copper) into a flat tube having a cross section of an elliptical shape (or an elongated rectangular shape).

The heat receiving tube 4a is a flat tube having an elliptical cross section, and has a plurality of internal partitioning plates formed therein in a vertical direction (substantially O-shaped cross section). With this internal partition plate, the heat receiving tube 4a is configured as a perforated tube whose inside is divided into a plurality of small passages. That is, the tubular member forming the heat receiving tube 4a has two opposing wall surfaces,
It can be said that a plurality of plate members that are in contact with the two wall surfaces are disposed inside, and a small passage is formed by the plurality of passages surrounded by the plurality of plate members and the two wall surfaces. As a result, there are effects such as improvement of pressure resistance performance and improvement of heat absorption efficiency due to an increase in contact surface area with the refrigerant. The heat receiving tube 4a
Can be easily formed by extrusion. The diameter of each small passage (the maximum diameter of each side when the small passage is rectangular, and the maximum diameter when the small passage is circular or elliptical) is the bubble when the refrigerant boils and leaves the inner wall of the heat receiving tube 4a. preferably from 1 to 10 ² times the diameter, 0.5 in this embodiment
It is set to 1 mm. The heat receiving tube 4a is arranged such that the small passages are opened in the vertical direction (from the high temperature side lower tank 42a to the high temperature side upper tank 41a), and are arranged such that the small passages are stacked in the direction in which the high temperature fluid flows. Is done.

The radiator 3b is disposed above the refrigerant tank 3a and is displaced from the refrigerant tank 3a toward the lower blower 34 (the left side in FIG. 1). The radiator 3b is provided on a predetermined plane (second
A plurality of radiating tubes 4b arranged on the lower surface of the radiating tube 4b, and a low-temperature side lower tank 42b which communicates the radiating tubes 4b below, and a radiating tube 4b arranged above the radiating tubes 4b. And a low-temperature-side upper tank 41b which communicates the radiator tubes 4b at the upper side to constitute a flat radiator. The heat radiating tube 4b is also formed by forming a metal material having excellent heat conductivity (for example, aluminum or copper) into a flat tube having an elliptical cross section (or an elongated rectangular shape).

The heat radiating tube 4b is also formed by a flat tube having an elliptical cross section, and has a plurality of internal partitioning plates formed therein in the vertical direction. As a result, there are effects such as improvement of pressure resistance performance and improvement of heat radiation efficiency due to an increase in contact surface area with the refrigerant. This radiator tube 4b can also be easily formed by extrusion. This heat radiating tube 4b is also a heat receiving tube 4a.
Similarly, the small passages are arranged so as to open in the vertical direction (from the low-temperature side lower tank 42b to the low-temperature side upper tank 41b), and are arranged such that the small passages are stacked in the direction in which the low-temperature fluid flows. .

The high temperature side communication pipe 9a is connected to the high temperature side upper tank 41a of the refrigerant tank 3a and the low temperature side upper tank 41 of the radiator 3b.
b, and sends the refrigerant which has been vaporized in the refrigerant tank 3a to the radiator 3b. The high-temperature side communication pipe 9a has a portion bent from the refrigerant tank 3a side to the radiator 3b side between the penetrating portion of the fluid separator 2 and the high-temperature upper tank 41a of the refrigerant tank 3a. Between the penetrating portion of the separator 2 and the lower temperature upper tank 41b of the radiator 3b, there is a portion bent from the radiator 3b side to the refrigerant tank 3a side. And it penetrates substantially perpendicularly through the fluid separator 2 between the two bent portions. And the high temperature side communication pipe 9a
Are arranged substantially parallel to the heat receiving tubes 4a with a predetermined interval (preferably, an interval larger than the distance between the heat receiving tubes 4a, more preferably, twice or more the interval between the heat receiving tubes 4a). .

The low-temperature communication pipe 9b is connected to the low-temperature lower tank 42b of the radiator 3b and the high-temperature lower tank 42 of the refrigerant tank 3a.
a, and returns the refrigerant cooled and liquefied by the radiator 3b to the refrigerant tank 3a. The low-temperature communication pipe 9b has a portion bent from the refrigerant tank 3a toward the radiator 3b between the penetrating portion of the fluid separator 2 and the high-temperature lower tank 42a of the refrigerant tank 3a. A portion bent from the radiator 3b side to the refrigerant tank 3a side is provided between the penetrating portion of the separator 2 and the lower temperature lower tank 42b of the radiator 3b. And it penetrates substantially perpendicularly through the fluid separator 2 between the two bent portions. The low-temperature side communication pipe 9b is substantially parallel to the heat radiating pipe 31a and at a predetermined interval (preferably each heat radiating pipe 3a).
1a are arranged with an interval larger than the distance between them, and more preferably, at least twice the interval between them.

The sealing tube 91 is located below the low-temperature side communication tube 9b (below the liquid level of the refrigerant when it is not operated, preferably at the center O).
2 below) to charge and discharge the refrigerant.
Further, the sealing tube 91 is independently provided in the low-temperature side communication pipe 9b of each of the boiling cooling devices 3. The sealed tube 91 is used not only for introducing a refrigerant but also for deaeration (decompression) in the boiling cooling device 3. The internal pressure of each ebullient cooling device 3 is set lower as it is located upstream of the low-temperature fluid (downstream of the high-temperature fluid). Thereby, the operating temperature of the boiling cooling device 3 becomes lower toward the upstream of the low-temperature fluid (downstream of the high-temperature fluid), and the temperature range in which the boiling cooling device 3 exchanges heat at each position is shifted. As a result, heat exchange in a wide temperature range becomes possible.

In the present embodiment, the total number of the high-temperature side communication pipes 9a and the low-temperature side communication pipes 9b is
The number is set to be smaller than any of the number of the heat receiving tubes 4a and the number of the heat radiating tubes 4b of the radiator 3b. Also,
Radial cross-sectional area of high-temperature side communication pipe 9a and low-temperature side communication pipe 9b
Of the heat receiving pipes 4 of the refrigerant tank 3a.
a total cross-sectional area in the radial direction of each radiator tube 4b of radiator 3b
Are set smaller than any of the sums of the cross-sectional areas in the radial direction.

The connecting portion of the low-temperature side communication pipe 9b with the low-temperature side lower tank 42b is connected to the high-temperature side lower tank 42b.
The connection part with the low-temperature upper tank 41b of the high-temperature communication pipe 9a is connected to the high-temperature upper tank 41a in a direction opposite to the vertical direction of the rear-side partition plate 27 with respect to the vertical direction. The parts are arranged shifted from the vertical direction.

In the present embodiment, the heat receiving pipe 4 of the refrigerant tank 3a is
The width in the direction in which “a” is stacked is the radiator tube 4b of the radiator 3b.
Are substantially the same as the horizontal width in the direction in which the layers are stacked, and the refrigerant tank 3a and the radiator 3b are arranged so as to be shifted from each other in the horizontal width direction. Here, since the ends of the refrigerant tank 3a and the radiator 3b in the width direction are shifted, a position shift portion occurs. The high-temperature side communication pipe 9a is arranged at a positionally displaced part of the radiator 3b, and the low-temperature side communication pipe 9b is arranged at a positionally displaced part of the refrigerant tank 3a.

The refrigerant is HFC-134a (chemical formula: CH
₂ FCF ₃ ), water, etc., in a range where the pressure inside the container is not so high (in the case of HFC-134a, for example, a pressure of several tens of atmospheres or less) so that it boils with a high temperature fluid and is condensed with a low temperature fluid. Is set. Specifically, the refrigerant is selected to be boiled below at most 100 ° C. Here, as the refrigerant, a refrigerant having a plurality of compositions may be mixed, or a refrigerant mainly having a single composition may be used. In addition, when the liquid level of the refrigerant is not operating,
Or the refrigerant is absorbed by the heat-absorbing upper communication portion 4.
The liquid level is sealed to some extent in the refrigerant tank 3a. It is preferable that the amount of the refrigerant does not reach the heat radiating pipe 4b during operation. However, the refrigerant is sealed after the heat absorbing fin 6a and the heat radiating fin 6b are brazed to the heat receiving tube 4a and the heat radiating tube 4b, respectively.

The heat receiving fins 6a are arranged between the heat receiving tubes 4a, and the heat radiating fins 6b are arranged between the heat radiating tubes 4b. The heat receiving fin 6a and the radiation fin 6b
Corrugated fins formed by alternately pushing back thin plates (of a thickness of about 0.02 to 0.5 mm) of a metal (for example, aluminum) having excellent heat conductivity to form a corrugated fin, and the flat outer wall surfaces of the heat receiving tube 4a and the heat radiating tube 4b. (Ie, joined in a fused state). The heat receiving fins 6a facilitate the transfer of heat on the high-temperature fluid side to the refrigerant, and at the same time improve the strength of the heat receiving tube 4a. The radiating fins 6b facilitate the transfer of the heat of the refrigerant to the low-temperature fluid side, and at the same time improve the strength of the radiating tube 4b.

In the present embodiment, the fin pitch P1 (for example, 1.50) of the heat receiving fins 6a provided in the refrigerant tank 3a.
mm to 2.90 mm, preferably 2.00 mm to 2.5
0 mm, 2.40 mm in this example) is changed to the fin pitch P2 (for example, 3.00 mm) of the radiation fin 6b of the radiator 3b.
４4.50 mm, desirably 3.50 mm to 4.00 m
m in this example is smaller than 3.75 mm).
That is, the fin pitch P1 of the heat receiving fins 6a is, for example, 50% to 6% smaller than the fin pitch P2 of the heat radiation fins 6b.
It is reduced by about 5%.

As shown in FIGS. 1 and 4, the boiling cooling device 3 includes a high-temperature air (clean air in the housing 13) circulating in the high-temperature side heat transfer space 17 of the closed space 16 and a low-temperature air. The boiling cooler 3 is moved in the flow direction of the high-temperature air and the low-temperature air so that the low-temperature air (dirty air outside the housing 13) circulating in the side heat transfer space 18 has a counterflow.
Are arranged in multiple stages.

The upper blower 31 is a low-temperature blower of the present invention, and is a turbo fan which is a kind of centrifugal fan. As shown in FIG. 5, each upper-side blower 31 includes a turbo fan that generates an airflow in the low-temperature-side heat transfer space 18,
An electric motor 32 for rotating the turbo fan, an intake bell mouth 311 as a suction port, and a discharge port 312
Respectively.

The upper blower 31 is opposed to the radiator 3b so as to be substantially parallel to the radiator 3b. That is, the plane is closer to the first plane than the second plane and parallel to a plane substantially parallel to the second plane. Further, the suction port side is disposed so as to face the radiator 3b. The upper-side blower 31 sucks and introduces the low-temperature air (low-temperature air as a low-temperature fluid) introduced through the low-temperature suction port 26a between the radiator tubes 4b of the radiator 3b. Then, the discharge side of the upper blower 31 is opened to the low-temperature discharge port 26b, and the wind that has exited the upper blower 31 is discharged.

Then, the center O3 of the suction port of the upper blower 31 is opposed to the center O1 of the radiator 3b (preferably substantially coincident) with the center O1. In the centrifugal fan, the center O3 of the suction port is eccentric with respect to the center of the blower casing, and a portion 313 opposite to the center O3 is a portion having a small suction amount. In the present embodiment, this portion is arranged so as to face the high-temperature side communication pipe 9a.

The lower blower 34 is a high-temperature blower of the present invention, and is a turbo fan which is a kind of centrifugal fan. Each lower-side blower 34 has a turbo fan that generates an airflow in the high-temperature-side heat transfer space 17 and an electric motor 35 that rotates the turbo fan. Since the lower fan 34 has the same configuration as the upper fan 31, the description thereof is omitted.

The lower blower 34 is disposed so as to be substantially parallel to the refrigerant tank 3a. That is, the plane is located on the second plane side of the first plane and parallel to a plane substantially parallel to the first plane. Furthermore, it is arrange | positioned so that a suction port side may face the refrigerant tank 3a side. The lower-side blower 34 causes the high-temperature air (high-temperature air as a high-temperature fluid) introduced through the high-temperature side suction port 27a to be introduced between the heat receiving tubes 4a of the refrigerant tank 3a by suction.

The center O3 of the suction port of the lower blower 34 is also opposed to the center O2 of the refrigerant tank 3a (preferably substantially coincident). Similarly, for the lower blower 34, the center O3 of the suction port of the blower casing
Is arranged so as to face the low-temperature side communication pipe 9b. The position of the low-temperature side communication pipe 9b with respect to the refrigerant tank 3a and the position of the high-temperature side communication pipe 9a with respect to the radiator are point-symmetric with respect to the fluid separator 2, and the discharge directions of the high-temperature fluid and the low-temperature fluid are also symmetric. Therefore, the upper blower 31 and the lower blower 34 having the same shape (the same scroll direction) can be used.
Thereby, the cost of the blower can be reduced.

In this embodiment, the lower blower 3
4 from the end of the anti-refrigerant tank 3a side to the end of the anti-radiator of the upper blower 31 (perpendicular to the rear partition plate)
The distance is one of the thicker one of the refrigerant tank 3a and the radiator 3b (the same thickness in the present embodiment), and the lower blower 3
4 and the total thickness of the upper fan 31 is smaller than the total thickness.

An electric heater (not shown) is provided in the closed space 16.
When the internal temperature is lower than the lower limit temperature (for example, 0 ° C.), the performance of the electronic component (for example, the semiconductor element) 11 is reduced. This is an internal fluid heating means for heating the air flowing through the heat space 17. The electric heater according to this embodiment has a heat value of, for example, 1.2 kW.

The controller 24 controls the two upper-side blowers 31 based on the temperature detected in the closed space 16 detected by a temperature sensor (not shown) as a temperature detecting means composed of a temperature sensing element such as a thermistor. Electric motor 3
It is a control means for controlling electric devices such as the electric motor 35 of two or two lower blowers 34 and electric heaters. When the temperature in the closed space 16 is equal to or higher than the lower limit temperature (for example, 0 ° C.), the controller 24 operates the two upper-side blowers 31 and the two lower-side blowers 34 in the Hi operation (strong air flow) or L mode.
o Operation (weak air flow) and turning off the electric heater. Note that, in the present embodiment, the controller 24 operates during normal time (daytime) when the temperature in the closed space 16 is equal to or higher than the lower limit temperature.
The upper blowers 31 and the two lower blowers 34 are operated such that the respective blowers have substantially the same rotation speed and the same blowing amount. At night and late at night, the number of rotations of at least one of the two upper-side blowers 31 is reduced (relative to normal time) to reduce the amount of air blow, and the two lower-side blowers 3
The number of rotations is increased by increasing at least one of the rotation speeds of No. 4 (relative to the normal time). Thereby, the noise of the upper fan 31 can be reduced at night and at night when the noise when the upper fan 31 operates is a problem. When the temperature in the closed space 16 is equal to or lower than the lower limit temperature (for example, 0 ° C.), the controller 24 controls the two upper blowers 3
The first electric motor 32 is turned off, the electric motors 35 of the two lower blowers 34 are operated Hi (strong air flow) or Lo operation (weak air flow), and the electric heater is turned on (on).

The maintenance hatch 28 is
Is detachably provided on the side of the refrigerant tank 3a. The maintenance hatch 28 is fixed to the cooling device 25 during operation and is opened during cleaning. In the case cooling device of the present embodiment, a plurality of boiling cooling devices 3 shown in FIG. 14 are stacked in a direction in which the high-temperature fluid and the low-temperature fluid flow, respectively.

Next, the operation of this embodiment will be described. The heating element 11 generates heat by operating, and the inside of the sealed space 16 becomes high temperature. When the lower blower 34 circulates the hot air, the hot air passes through the hot suction port 27a and is introduced between the heat receiving tubes 4a of the refrigerant tank 3a. The refrigerant sealed in each of the heat receiving tubes 4a of the refrigerant tank 3a receives heat transmitted from the high-temperature air via the heat receiving fins 6a and evaporates. The vaporized refrigerant vapor is collected in the high-temperature upper tank 41a above the heat receiving pipe 4a, and is sent out to the low-temperature upper tank 41b through the high-temperature communication pipe 9a. The refrigerant vapor is distributed to each radiator pipe 4b of the radiator 3b which is exposed to the low temperature fluid from the low temperature side upper tank 41b and has a low temperature,
The condensed liquid is condensed and liquefied on the inner wall surface of each radiating tube 4b, and the condensed latent heat is transmitted to the low-temperature air through the radiating fins 6b. Radiator 3
The refrigerant condensed and liquefied in b flows down the inner wall surface by its own weight and drops to the low temperature side lower tank 42b. The dropped refrigerant flows down the low-temperature communication pipe 9b and drops to the high-temperature lower tank 42a of the refrigerant tank 3a. The upper blower 31 continuously sucks low-temperature air from outside and introduces it into the radiator 3b. Due to the repetition of the boiling and condensation and liquefaction of the refrigerant, the heat of the heating element 11 can be efficiently radiated to the outside without mixing the high-temperature air and the low-temperature air.

According to the present embodiment, the refrigerant tank 3a comprises a plurality of heat receiving tubes 4a, and is arranged to face the lower blower 34. The radiator 3b is composed of a radiator tube 4b,
In the upper part of “a”, the refrigerant tank 3a is arranged so as to be displaced toward the lower fan side. And the upper side blower 31 is the refrigerant tank 3
The upper part of the radiator 3b is disposed to face the radiator 3b on the side opposite to the lower fan 34. Thereby, the thickness in the lateral direction can be reduced, and the wind speed distribution in the length direction can be made uniform. Further, the high-temperature side communication pipe 9a and the low-temperature side communication pipe 9b for connecting the heat receiving pipe 4a of the refrigerant tank 3a and the heat radiating pipe 4b of the radiator 3b are provided with a lower blower for the refrigerant tank 3a between one and the other. It is bent to the 34 side. Here, the number of the communication pipes is two in the present embodiment, and this is the heat receiving pipe 4a.
Since the number is smaller than the number of the heat radiating tubes 4b, the manufacturing cost for bending can be prevented from increasing.

The refrigerant tank 3a and the lower blower 34 are opposed to each other substantially in parallel, and the radiator 3b and the upper blower 31 are arranged.
Are arranged substantially parallel to each other, so that the wind velocity distribution in the longitudinal direction of the refrigerant tank 3a and the radiator 3b can be made uniform. Thus, the thickness in the lateral direction can be reduced, and the wind speed distribution in the longitudinal direction can be made uniform. In the centrifugal blower that forms the lower blower 34 and the upper blower 31, the flow after passing through the fan is bent at a right angle, so that the blower can be efficiently routed even in the cooling device. Moreover, since each blower can be brought closer to the refrigerant tank 3a or the radiator 3b, the thickness of the entire cooling device can be reduced.

The fluid separator 2 includes a refrigerant tank 3a and a radiator 3b.
, The water mixed into the low-temperature portion simultaneously with the low-temperature fluid can be quickly dropped below the fluid separator 2. Thereby, each communication pipe 9a, 9
The reliability at the penetrating portion between b and the fluid separator 2 can be improved. Further, since the communication pipes 9a and 9b are penetrated substantially perpendicularly to the fluid separator 2, the reliability at the portion where the communication pipes 9a and 9b and the fluid separator 2 penetrate can also be improved.

The refrigerant tank 3a is composed of a flat heat receiver having ventilation holes (gap between the heat receiving fins 6a) through which a high-temperature fluid flows, and the radiator 3b is provided above the refrigerant tank 3a in the refrigerant tank 3a. It is composed of a flat radiator having a ventilation hole (a gap between the radiation fins 6b) which is displaced with respect to the low temperature fluid and flows therethrough. Here, the refrigerant tank 3a is shifted to the upper side blower 31 side, the radiator 3b is shifted to the high temperature side blower side, and the anti-radiator 3b of the upper side blower 31 is moved from the end of the high temperature side fan opposite to the refrigerant tank 3a side. The distance to the side end is set smaller than the total thickness of one of the thicker one of the refrigerant tank 3a and the radiator 3b, the lower blower 34 and the upper blower 31. The communication pipes 9a and 9b that communicate the refrigerant tank 3a and the radiator 3b are formed of a tubular member having an internal cross-sectional area smaller than either the internal cross-sectional area of the refrigerant tank 3a or the internal cross-sectional area of the radiator 3b. Thereby, the thickness in the lateral direction can be reduced, and the wind speed distribution in the length direction can be made uniform. In addition, it is possible to prevent the processing cost of the communication pipe from increasing.

An intake bell mouth (suction port) of the lower blower 34 is disposed on the refrigerant tank 3a side, and an intake bell mouth 311 (suction port) of the upper blower 31 is disposed on the radiator 3b side. The fluid is circulated facing the fluid. Thereby, the flow of the fluid in the suction part of each blower is rectified, the blowing resistance is reduced, and the generation of noise is suppressed. Therefore, the interval between the refrigerant tank 3a and the lower blower 34,
The distance between the radiator 3b and the upper fan 31 can be reduced. Further, the heat receiving fins 6a of the refrigerant tank 3a and the radiators 3b
Can be blown in the vertical direction with respect to the radiation fins 6b. As a result, the thickness in the lateral direction can be reduced, and at the same time, the refrigerant tank 3a
In addition, the wind speed distribution in the length direction of the radiator 3b can be made uniform.
Here, when the discharge port 312 of each blower is opposed to the refrigerant tank 3a or the radiator 3b, the flow having the swirl component discharged from the discharge port 312 collides with the refrigerant tank 3a or the radiator 3b and is rectified. Therefore, not only the blowing efficiency of the blower itself is reduced, but also noise may be generated.

Further, the upper fan 31 and the lower fan 34 are turbo fans, which are a kind of centrifugal fans. And, the center O3 of the suction port of the upper side blower 31
Is aligned with the center O1 of the radiator 3b, and the center O3 of the suction port of the lower blower 34 is set to the center O of the refrigerant tank 3a.
Opposite to match 2. Thereby, the wind speed distribution in the longitudinal direction and the lateral direction of the refrigerant tank 3a and the radiator 3b can be made uniform.

Since the connecting portion on the radiator 3b side of the high-temperature side communication tube 9a and the low-temperature side communication tube 9b is displaced closer to the radiator 3b side than the connection portion on the refrigerant tank 3a side, the horizontal direction is reduced. The thickness can be reduced. The width of the refrigerant tank 3a in the direction in which the heat receiving tubes 4a are stacked is equal to the width of the heat radiating tubes 4 of the radiator 3b.
b is substantially the same as the lateral width in the direction in which
And the radiator 3b are arranged so as to be shifted from each other in the lateral width direction. Since the ends of the refrigerant tank 3a and the radiator 3b in the width direction are shifted, a position shift portion is generated. Since the high-temperature side communication pipe 9a is arranged in the positionally displaced portion of the radiator 3b and the low-temperature side communication pipe 9b is arranged in the positionally displaced part of the refrigerant tank 3a, the overall width of the cooling device 25 can be reduced.

Other effects of the present embodiment will be described below. The intake bell mouth (suction port) of the lower blower 34 is arranged on the refrigerant tank 3a side, and the intake bell mouth 311 (suction port) of the upper blower 31 is arranged on the radiator 3b side. The heat receiving tubes 4a and the heat receiving fins 6a, and the heat radiating tubes 4b and the heat radiating fins 6b of the radiator 3b also function as protection nets for the respective blowers, so that foreign substances can be prevented from being mixed into the respective blowers.

In the upper blower 31, a fan is provided in a direction in which wind and rain enter, and the water pressure applied to the electric motor 32 can be reduced by the fan boss portion, and the waterproof property can be improved. The fin pitch of the heat receiving fins 6a of the refrigerant tank 3a is smaller than the radiating fins 6b of the radiator 3b. Thus, when the flow rate of the high-temperature fluid is increased, it is possible to compensate for the increase in the flow velocity of the high-temperature fluid passing through the heat receiving tube 4a and the decrease in the time for transmitting the heat amount of the high-temperature air to the heat receiving fins 6a. This prevents the radiator 3b from being clogged while preventing the fin pitch from being equal in size on the high temperature side (inside air side) and the low temperature side (outside air side) of the fluid separator 2. 3a
The fin pitch P1 of the radiator 3b is made smaller than the fin pitch P2 of the radiator 3b, so that the cooling performance of high-temperature air can be improved.
The size of the boiling cooler 3 and, consequently, the size of the boiling cooling device 14 can be reduced.

As shown in FIG. 1, a high-temperature side suction port 27a and a high-temperature side discharge port 27b communicating with the closed space 16 are provided in the upper and lower portions of the rear partition plate 27 of the cooling device, respectively. The high-temperature side suction port 27 a is connected to an opening communicating with the upper part of the closed space 16 in order to take in the gas in the storage space 16 into the high-temperature side heat transfer space 17. Specifically, a high-temperature side heat transfer space 17 extending vertically in the boiling cooler 3 is formed by the side wall surface and the rear-side partition plate 27, and an upper end of the high-temperature side heat transfer space 17 has a high-temperature side suction port 27a. Closed space 1
6 (opened above the fluid separator 2).

As a result, the gas heated to a high temperature by the heat of the heating element 11 is introduced from the high-temperature side suction port 27a into the high-temperature side heat transfer space 17 and smoothly guided to the refrigerant tank 3a. The temperature can be kept uniform. That is,
Since the gas heated to high temperature by the heat generated from the heating element 11 rises in the closed space 16 by convection, it is better to provide the high-temperature side suction port 27a in the upper portion of the closed space 16.
It can be said that the inside cooling efficiency is good. In other words, when the high-temperature side suction port 27a is located at a position lower than the fluid separator 2, relatively low-temperature gas in the closed space 16 is introduced from the high-temperature side suction port 27a into the high-temperature side heat transfer space 17, and the refrigerant tank Since it is guided to 3a, there is a possibility that the cooling efficiency in the closed space 16 is reduced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram in which the present invention is applied as a cooling device of an electronic apparatus.

FIG. 2 is a side view of the electronic apparatus shown in FIG.

FIG. 3 is a front view showing a specific structure of the boiling cooling device of FIG. 1;

FIG. 4 is a side view of the boiling cooling device shown in FIG. 3;

5A is a front view showing a turbo fan of the electronic apparatus shown in FIG. 1, and FIG. 5B is a side view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic apparatus 2 Fluid separator 3 Boiling cooling device 3a Refrigerant tank (high-temperature side heat exchanger) 3b Radiator (low-temperature side heat exchanger) 4a Heat receiving tube (tubular member of high-temperature side heat exchanger) 5 Radiation tube ( 6a Heat receiving fin 6b Heat radiating fin 9a High temperature side communication pipe (communication pipe) 9b Low temperature side communication pipe (communication pipe) 11 Electronic component 13 Housing (housing) 16 Closed space 17 High temperature side heat transfer Space 18 Low-temperature side heat transfer space 20 Casing 24 Controller 25 Cooling device 26 Outer wall plate 26a Low-temperature side suction port 26b Low-temperature side discharge port 27 Back side partition plate 27a High-temperature side suction port 27b High-temperature side discharge port 28 Maintenance hatch 31 Upper side blower ( Low temperature side blower) 311 Intake bell mouth (suction port) 312 Outlet port 32 Electric motor 34 Lower side blower (high temperature side blower) 4 a hot side upper tank (high temperature side upper communication portion) 41b cold side upper tank (low temperature side upper communication portion) 42a hot side lower tank (high temperature side lower communication portion) 42b lower temperature side lower tank (low temperature side lower communication portion)

Claims (11)

[Claims] 1. The heat of a high-temperature fluid that is passed through a high-temperature portion,
A cooling device that moves to a low-temperature fluid that is ventilated to a low-temperature portion separated by the high-temperature portion and a fluid separator, wherein the high-temperature side blower is disposed in the high-temperature portion and circulates the high-temperature fluid. A high-temperature side heat exchanger in which a refrigerant that receives heat from the high-temperature fluid and that evaporates and evaporates is enclosed therein, and the high-temperature side heat exchanger includes: A lower number of tubular members than the number of tubular members, one connected to the tubular member of the hot side heat exchanger, the other extending through the fluid separator to the cold portion, one and the other And a communication pipe bent toward the high-temperature side blower side with respect to the high-temperature side heat exchanger, comprising a larger number of tubular members than the number of the tubular members of the communication pipe, in the low-temperature portion. Above the high-temperature side heat exchanger, the high-temperature side heat exchanger is displaced toward the high-temperature side blower, and connected to the other of the communication pipes. A low-temperature heat exchanger that condenses and liquefies the refrigerant by releasing the heat of the cooled refrigerant to the heat-radiating portion; an upper portion of the high-temperature heat exchanger in the cold portion and an anti-high-temperature side of the low-temperature heat exchanger A cooling device, comprising: a low-temperature-side blower that is arranged to face the blower and allows the low-temperature fluid to flow. 2. The plurality of tubular members in the high-temperature side heat exchanger are arranged on a first plane, and the plurality of tubular members in the low-temperature side heat exchanger are parallel to the first plane. And arranged on a second plane different from the first plane, wherein the high-temperature side blower is closer to the second plane than the first plane and substantially parallel to the first plane. 2. The cooling device according to claim 1, wherein the low-temperature side blower is arranged on the first plane side of the second plane and substantially in parallel with the second plane. 3. . 3. The fluid separator is disposed to be inclined with respect to the high-temperature side heat exchanger and the low-temperature side heat exchanger, and the communication pipe is penetrated substantially perpendicularly to the fluid separator. The cooling device according to claim 1, wherein: 4. The high-temperature side heat exchanger includes a high-temperature-side lower communication portion that connects a plurality of tubular members of the high-temperature side heat exchanger at a lower portion, and a plurality of tubular members of the high-temperature side heat exchanger at an upper portion. The low-temperature side heat exchanger further includes a high-temperature side upper communication portion that communicates with the low-temperature side heat exchanger, and a low-temperature side lower communication portion that communicates a plurality of tubular members of the low-temperature side heat exchanger at a lower portion, and a plurality of the low-temperature side heat exchangers. A low-temperature-side upper communication portion that allows the tubular member to communicate with the upper portion, wherein the communication tube has one connected to the high-temperature-side upper communication portion and the other connected to the low-temperature-side upper communication portion, and is connected to the high-temperature-side heat exchanger. A high-temperature side communication pipe for sending the vaporized refrigerant to the low-temperature side heat exchanger; and one connected to the high-temperature side lower communication section and the other connected to the low-temperature lower communication section, and connected to the low-temperature side heat exchanger. Return the refrigerant liquefied and cooled in the high-temperature side heat exchanger A high-temperature side communication pipe is provided, and the high-temperature side communication pipe and the low-temperature side communication pipe are both bent toward the high-temperature side blower side with respect to the high-temperature side heat exchanger between one and the other. The cooling device according to claim 1, wherein: 5. The heat of the high-temperature fluid passed through the high-temperature portion,
A cooling device that moves to a low-temperature fluid that is ventilated to a low-temperature portion separated by the high-temperature portion and a fluid separator, wherein the flat-type heat receiver is provided in the high-temperature portion and has a ventilation hole through which the high-temperature fluid flows. A high-temperature side heat exchanger in which a refrigerant that receives heat from the high-temperature fluid and boils and evaporates is enclosed therein, and is shifted with respect to the high-temperature side heat exchanger above the high-temperature side heat exchanger in the low-temperature portion. A low-temperature heat source that is disposed and has a flat radiator having a ventilation hole through which the low-temperature fluid flows, and that releases the heat of the refrigerant vaporized in the high-temperature heat exchanger to the heat-radiating portion to condense and liquefy the refrigerant. Exchanger, and a tubular member having an internal cross-sectional area smaller than any of the internal cross-sectional area of the high-temperature side heat exchanger and the internal cross-sectional area of the low-temperature side heat exchanger, one of which is connected to the high-temperature side heat exchanger Is A cooling pipe comprising: a communication pipe connected to the low-temperature side heat exchanger through the other side through the fluid separator; and the high-temperature portion is disposed so as to face the high-temperature side heat exchanger. A high-temperature side blower that allows a fluid to flow through the ventilation holes of the high-temperature side heat exchanger; and, in the cold / hot portion, facing the low-temperature side heat exchanger on the side opposite to the high-temperature side blower across the heat exchange device. And a low-temperature side blower that allows the low-temperature fluid to flow through ventilation holes of the low-temperature side heat exchanger, and the high-temperature side heat exchanger in the boiling cooling device is shifted to the low-temperature side blower side, The low-temperature side heat exchanger is shifted to the high-temperature side blower side, and the distance from the anti-high-temperature side heat exchanger side end of the high-temperature side blower to the anti-low-temperature side heat exchanger side end of the low-temperature blower is: The high temperature side heat exchanger and the low temperature Thicker one of the heat exchanger, a cooling device, characterized in that less than the total thickness of the hot blower and the low-temperature blower. 6. The high-temperature side fan has a suction port disposed on the high-temperature side heat exchanger side, and the low-temperature side fan has a suction port disposed on the low-temperature side heat exchanger side. The cooling device according to any one of claims 1 to 5, wherein the cooling device is made to face and circulate. 7. The communication pipe according to claim 1, wherein the other end of the communication pipe is arranged so as to be shifted toward the low-temperature side heat exchanger with respect to the one vertical direction. The cooling device according to claim 1. 8. A high-temperature fluid that is provided with a housing in which an electric device that generates heat when activated is housed, wherein the high-temperature portion is partitioned into a part of the housing and heated by the heat of the electric device. Is a region circulated by the high-temperature side blower, and the low-temperature portion is a region isolated from the inside of the housing and the high-temperature portion by the fluid separator. The cooling device according to any one of the above. 9. The housing has a front surface on a side where the high-temperature portion is partitioned, wherein the high-temperature heat exchanger, the low-temperature heat exchanger, the high-temperature fan and the low-temperature fan are connected to the front surface. 9. The cooling device according to claim 8, wherein the cooling device is arranged substantially in parallel. 10. The horizontal width of the high-temperature side heat exchanger in the direction in which the tubular members are stacked is substantially the same as the horizontal width of the low-temperature side heat exchanger in the direction in which the tubular members are stacked, and The side heat exchanger and the low-temperature side heat exchanger are arranged so as to be shifted from each other in the lateral width direction, the high-temperature side communication pipe is arranged at a position shift portion of the low-temperature side heat exchanger, and the low-temperature side communication pipe is The cooling device according to claim 4, wherein the cooling device is arranged at a position shifted portion of the high-temperature side heat exchanger. 11. At least one of the high-temperature side blower and the low-temperature side blower is a centrifugal blower whose suction port is eccentric to a blower casing, and the center of the suction port of the centrifugal blower is the high-temperature blower. The heat exchanger according to any one of claims 1 to 10, wherein the heat exchanger and the low-temperature heat exchanger are disposed so as to substantially coincide with one center facing the centrifugal blower. The cooling device according to any one of the above.