JP2003258475A - Boiling cooler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a boiling cooler which can improve cooling performance by discontinuing a header by changing a refrigerant channel. <P>SOLUTION: The boiling cooler comprises a heat sink tube 120 having a first channel 121 and a second channel 122 so that the channel 121 communicates with the channel 122 via a communicating passage 123 at one end side, a heater 10 mounted at a lower surface side, and a refrigerant tank 110 for storing the refrigerant therein so that the other end of the tube 20 is connected to the opposite side of the heater of the tank 110. The channel 121 and the channel 122 communicate with the tank 110. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boiling cooling device for cooling a heating element such as a semiconductor element by latent heat transfer due to boiling and condensation of a refrigerant.

[0002]

2. Description of the Related Art FIG. 16 shows a boiling cooling device 100 that the present inventor is making a trial, and the boiling cooling device 100 is
Refrigerant tank 110 in which the refrigerant is stored, heat dissipation core portion 12
0A and a header 140, and the heating element 10 is attached to the heat receiving surface 110a below the refrigerant tank 110.

The heat dissipation core portion 120A is a heat dissipation tube 12
0 and the radiation fin 130, and the radiation tube 12
0 is arranged substantially upright with respect to the heat radiating surface 110b of the refrigerant tank 110 so that the refrigerant tank 110 and the header 140 communicate with each other.

The refrigerant stored in the refrigerant tank 110 is shown in FIG.
As shown in FIG. 1, the heat of the heating element 10 is received to boil and vaporize, and mainly from the heat dissipation tube 120 near the heating element 10 to the header 14
0, and then into the heat dissipation tube 120 outside the region of the heating element 10 to be condensed and liquefied by heat exchange with the outside air, and become condensed liquid from the header 140 to the refrigerant tank 110.
Reflux to. As a result, the heat generated from the heating element 10 is transferred to the refrigerant and is radiated to the outside air at the heat dissipation core portion 120A, whereby the heating element 10 is cooled.

[0005]

However, by providing the header 140 as a refrigerant flow path, the longitudinal dimension of the heat dissipation tube 120 is restricted within a limited mounting space, and the heat dissipation is correspondingly reduced. Since the area is reduced, it becomes a bottleneck to the need for improving the cooling performance of the boiling cooling device.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a boiling cooling device in which the header is abolished by changing the refrigerant flow passage to improve the cooling performance.

[0007]

The present invention employs the following technical means in order to achieve the above object.

According to the first aspect of the present invention, the first flow path (121) and the second flow path (122) are provided inside, and the first flow path (123) is provided on one end side by the communication path (123). 121)
And a heat dissipation tube (120) communicating with the second flow path (122) and a heating element (10) on the lower surface side,
And a refrigerant tank (110) in which the refrigerant is stored, and the other end side of the heat dissipation tube (120) has a refrigerant tank (11).
It is characterized in that the first flow path (121) and the second flow path (122) are connected to the side opposite to the heating element (0) so as to communicate with the inside of the refrigerant tank (110).

As a result, a flow path in which the boiling refrigerant rises from the refrigerant tank (110) and further condenses and descends can be formed in one heat dissipation tube (120), so that the header described in the section of the prior art is unnecessary. Therefore, the heat dissipation tube (120) can be lengthened in the lengthwise direction, and the heat dissipation area can be increased to improve the cooling performance.

Naturally, it is possible to reduce the cost for the unnecessary header. In addition, the heat dissipation tube (1
When the cooling air for promoting the condensation of the refrigerant is supplied to 20) from the direction intersecting the longitudinal direction of the heat radiating tube (120), since the header is eliminated, the ventilation resistance is reduced and more cooling air is radiated. It can be introduced on the (120) side. Furthermore, this heat dissipation tube (12
It is also possible to supply the cooling air from the end side in the longitudinal direction of 0), and the degree of freedom of the layout of the air blowing means (150) can be improved.

According to the second aspect of the invention, the first flow path (1
21) and the second flow path (122), the first flow path (12)
1) is characterized in that it is arranged on the heating element (10) side.

As a result, the boiling vaporized refrigerant easily flows into the first flow path (121) and the circulation of the refrigerant becomes smoother, so that the cooling performance can be further improved.

Further, as in the invention described in claim 3, in the refrigerant tank (110), the refrigerant boiled and vaporized by the heating element (10) flows so as to flow into the first flow path (121) side. Flow regulating means (113b, 114) for regulating the direction
b, 115b), the circulation direction of the refrigerant can be surely regulated, so that the cooling performance can be further improved.

In the invention according to claim 4, the heat dissipation tube (120) is formed by extruding the first flow path (1) inside.
21) and a tube portion (120a) in which the second flow path (122) is formed, and a closing member (120b) joined to one end portion (124) of the tube portion (120a), and Inside at least one of the end portion (124) and the closing member (120b), there is provided a thinned portion (125) that is thinned so as to straddle the first flow channel (121) and the second flow channel (122). It is characterized in that it is formed by being formed.

As a result, the first channel (121),
A heat dissipation tube (12) having a communication path (123) formed by the second flow path (122) and the thinned portion (125).
0) can be easily formed. Furthermore, the tube part (120
Before joining the blocking member (120b) to a), the refrigerant can be injected into the refrigerant tank (110) from the tube portion (120a), and it is not necessary to provide the refrigerant tank (110) with a dedicated refrigerant inlet.

In forming the heat dissipation tube (120), the heat dissipation tube (120) may be extruded to form the first flow path (121) and the second flow path inside. (122) is formed, and the first flow path (1) is formed inside one end (124) in the longitudinal direction.
21) and a thinned portion (125) that is thinned so as to straddle the second flow path (122).
The closure member (12) may be configured by a) and may be formed by crushing the peripheral edge of the end portion (124) and joining the abutting portions together.
0b) is unnecessary and can be made inexpensive.

Further, as in the invention described in claim 6, a plurality of flow paths (121a, 122a) are further formed in the first flow path (121) and the second flow path (122). By doing so, it is possible to increase the heat dissipation area and the refrigerant circulation speed in the heat dissipation tube (120) and further improve the cooling performance. In addition, a plurality of flow paths (12
The wall portion between 1a and 122a serves as a reinforcing member for the entire heat dissipation tube (120), so that the pressure resistance against the internal pressure of the refrigerant can be improved.

In the invention according to claim 7, the second flow path (1
22) are provided in one heat dissipation tube (120), and the first flow path (121) is provided with two second flow paths (12).
It is characterized by being arranged so as to be sandwiched by 2).

As a result, one heat dissipation tube (12
In (0), it is possible to form a refrigerant flow path corresponding to two heat radiation tubes (120), and the number of heat radiation tubes (120) can be reduced to reduce the cost.

Further, as in the invention described in claims 8 and 9, a plurality of heat dissipation tubes (120) are provided, and heat dissipation fins (130) are interposed between the heat dissipation tubes (120) to dissipate heat. The cooling performance can be improved by increasing the area.

According to the tenth aspect of the invention, cooling air for promoting heat exchange with the refrigerant is supplied from one of the plurality of heat radiation tubes (120), and the heat radiation fins (13) are provided.
By interposing 0) between the heat radiation tubes (120) on the lee side of the cooling air, the air flow resistance on the windward side of the cooling air can be reduced and the amount of air flowing into the heat radiation tube (120) can be increased. The cooling performance can be adjusted in consideration of the balance between this air volume and the heat radiation area by the heat radiation fins (130).

Further, as in the invention described in claim 11,
By arranging the plurality of heat dissipation tubes (120) in a staggered manner on the surface of the refrigerant tank (110), the arrangement density of the heat dissipation tubes (120) is increased when the heating element (10) is small and the heat flow velocity is high. Radiating tube (1)
It can be made to flow into the 1st flow path (121) of 20).

Further, when the cooling air is supplied to the heat radiation tube (120), a turbulent flow effect is generated to increase the heat transfer coefficient and improve the cooling performance.

According to the twelfth aspect of the present invention, if a plurality of heat radiation tubes (120) are arranged radially on the surface of the refrigerant tank (110), the air is blown from the longitudinal end of the heat radiation tube (120). When the cooling air is supplied by the means (150), the air can be smoothly discharged along the heat radiating tube (120) to increase the ventilation amount, and thus the cooling performance can be improved.

At this time, as in the thirteenth aspect of the present invention, the heating element (10) is attached to a region corresponding to the center of the plurality of radially arranged heat radiation tubes (120). Is good.

The reference numerals in parentheses of the above-mentioned means indicate the correspondence with the concrete means described in the embodiments described later.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) A first embodiment of a boiling cooling apparatus of the present invention will be described with reference to FIGS. The boiling cooling device 100 cools a heating element 10 such as a semiconductor element, and is composed of a coolant tank 110 and a heat dissipation core portion 120A. Each member described below is made of aluminum or an aluminum alloy. The parts are brazed together by a brazing material applied to the parts to be joined together.

First, the heat dissipation core portion 120A comprises a plurality of heat dissipation tubes 120. Here, a plurality of heat dissipation tubes arranged in the short side direction of the flat cross section are arranged in two rows in the long side direction.
It is connected to a coolant tank 110 described later. Further, the heat dissipation tube 120 includes the tube portion 120a and the closing member 1 joined to one end portion 124 of the tube portion 120a.
20b and.

The tube portion 120a has a flat cross section and is formed by extrusion. A partition wall 12 provided in the center in the long side direction of the flat cross section
6 form a first flow path 121 and a second flow path 122. The first flow path 12 is provided at the one end 124.
A thinned portion 125, which is thinned inside, is provided so as to straddle the first and second flow paths 122.

The blocking member 120b is the tube portion 12 described above.
The lid 120 has an oval shape that follows the cross-sectional shape of 0a.
It consists of b1 and insertion part 120b2. The insertion portion 120b2 is inserted into the thinned portion 125 of the tube portion 120a, and the tube portion 120a and the closing member 120b are joined to each other by brazing.

The tube member 120a is provided with a closing member 120.
Even after the insertion part 120b2 of b is inserted, the space of the thinned part 125 is left so that the first space is maintained by this space.
Communication path 123 that connects the flow path 121 and the second flow path 122
Are formed.

On the other hand, the coolant tank 110 is composed of a plurality of plates 1.
11 to 115, which are laminated structures, and the openings 113a to 11 formed in the plates 113 to 115, respectively.
The container 5a forms an internal space.

The heat receiving plate 111 is made of a rectangular flat plate member and constitutes the lower surface of the refrigerant tank 110. The heating element 10 is arranged in the center of the lower heat receiving surface 111a of the heat receiving plate 111, and is fixed by tightening a bolt or the like (not shown). The heating element 10 and the heat receiving surface 111
In order to reduce the contact thermal resistance with a, a heat conductive grease may be interposed between the two.

The heat radiating plate 112 is a flat plate member having the same outer shape as the heat receiving plate, and constitutes the upper surface of the refrigerant tank 110. And the heat dissipation tube 1
A plurality of tube holes 112a are provided so as to correspond to the 20 arrangement positions.

Heat receiving plate 111 and heat radiating plate 112
Intermediate plates 113, 114 and 115 are interposed between and. The intermediate plates 113 to 115 are provided with openings 113a to 115a, respectively, and when the plates 111 to 115 are stacked, an internal space serving as the refrigerant tank 110 is formed.

Further, the thick portions 113b to 115b of the respective intermediate plates 113 to 115 form a thick portion having an L-shaped cross section as shown in FIG. The thick portion corresponds to the flow restricting means in the present invention (details will be described later).

The other end (on the side opposite to the closing member) of the heat radiation tube 120 is inserted into the tube hole 112a and brazed, and the first flow passage 121 and the second flow passage 122 of the heat radiation tube 120 are connected to the refrigerant tank 110. Communicate with the interior space of.

Here, as shown in FIGS. 2 and 4, the thick portion 115b of the intermediate plate 115, which constitutes the flow restricting means, is provided at a position corresponding to the center of the tube hole 112a of the heat dissipation plate 112. Cage, heat dissipation tube 12
The end portion of the partition wall 126 inside 0 is in contact with the thick portion 115b. Then, in FIG. 2, a flow path (first flow path 12) located on the center side of the refrigerant tank 110 in the heat dissipation tube 120 is formed.
1) directly communicates with the internal space on the center side in the refrigerant tank 110, and conversely, the flow path (second flow path 122) located outside the refrigerant tank 110 in the heat dissipation tube 120 is the refrigerant tank. 11
It directly communicates with the inner space outside 0. If further added, the first flow path 121 located on the center side of the refrigerant tank 110 in the heat dissipation tube 120 is provided with the second flow path 121 located on the outer side.
It is arranged at a position close to the heating element 10 with respect to the flow path 122.

A predetermined amount of refrigerant is sealed in the internal space of the refrigerant tank 110. Refrigerants are water, alcohol,
Fluorocarbon, CFC, etc. are used. The refrigerant is sealed from one of the plurality of heat dissipation tubes 120. That is,
The occluding member 120b of one heat radiating tube 120 is not brazed and the end portion 124 of the tube portion 120a is in an open state, and after injecting the refrigerant from here,
The closing member 120b is brazed.

Next, the operation and effect of the boiling cooling device 100 will be described.

The refrigerant that has been boiled and vaporized mainly on the center side of the refrigerant tank 110 in response to the heat of the heating element 10 attached to the heat receiving surface 111a of the refrigerant tank 110 is the flow restricting means 113b-11.
It is guided to the 1st flow path 121 side of the radiation tube 120 by 5b, and rises. Then, it flows into the second flow path 122 via the communication path 123, is condensed and liquefied by heat exchange with the external air, and returns to the internal space located outside the refrigerant tank 110.
By releasing the latent heat of condensation at this time to the outside air, the heating element 1
Cool 0.

In the present invention, since the first passage 121, the second passage 122, and the communication passage 123 for connecting both passages are provided in the heat dissipation tube 120, the refrigerant tank 1
A flow path in which the boiling refrigerant rises from 10 and further condenses and descends can be formed in one heat dissipation tube 120. Therefore, the header described in the section of the related art is not necessary, and the heat dissipation tube 120 can be lengthened in the lengthwise direction, and the heat dissipation area can be increased to improve the cooling performance.

Naturally, it is possible to reduce the cost of the unnecessary header. In addition, the heat dissipation tube 12
The cooling tube which accelerates the condensation of the refrigerant to
When supplying from a direction intersecting the longitudinal direction of 0 (left-right direction in FIG. 2), the ventilation resistance is reduced by removing the header, and a larger amount of cooling air is radiated from the heat dissipation tube 12
It can be introduced on the 0 side. Further, as shown in FIG. 5, cooling air can be supplied from the end portion of the heat dissipation tube 120 in the longitudinal direction, and the degree of freedom in the layout of the air blower 150 can be improved.

The first flow path 121 of the two flow paths 121 and 122 in the heat dissipation tube 120 is disposed on the heating element 10 side, and the refrigerant boiled and vaporized by the heating element 10 is moved to the first flow path 121 side. Since the flow restricting means 113b to 115b for restricting the flow direction so as to flow in are provided, it becomes easier for the boiled vaporized refrigerant to flow into the first flow path 121, and the refrigerant circulation becomes smoother and further cooled. Performance can be improved.

Further, since the heat radiation tube 120 is formed from the tube portion 120a formed by extrusion and having the thinned portion 125 at the end portion 124 and the closing member 120b, the first flow passage 121 is formed inside. , Second flow path 1
22 and the communication passage 12 formed by the thinned portion 125
The heat radiation tube 120 having the number 3 can be easily formed. Further, before joining the blocking member 120b to the tube portion 120a, the refrigerant can be injected into the refrigerant tank 110 from the tube portion 120a, and it is not necessary to provide the refrigerant tank 110 with a dedicated refrigerant inlet.

In forming the heat dissipation tube 120, the thinned portion 1 is formed on the side of the closing member 120b as shown in FIG.
20b3 may be provided, and in this case, the tube portion 120a formed by extrusion can be used as it is without post-processing. Further, as shown in FIG. 7, the end portion 1 of the tube portion 120a provided with the thinned portion 125 is
Crush the periphery of 24 and join the contact parts (brazing)
By doing so, the closing member 120b can be eliminated and the cost can be reduced.

Furthermore, as shown in FIG.
Further, in the second flow path 122, a plurality of flow paths 121
Alternatively, a and 122a may be formed. According to this, it is possible to increase the heat dissipation area and the refrigerant circulation speed in the heat dissipation tube 120, and it is possible to further improve the cooling performance. In addition, the plurality of flow paths 121a, 122a
The intervening wall portion serves as a reinforcing member for the entire heat dissipation tube 120, so that the pressure resistance against the internal pressure of the refrigerant can be improved.

(Second Embodiment) A second embodiment of the present invention is shown in FIG. In the second embodiment, two second flow paths 122 are provided in one heat dissipation tube 120 in comparison with the first embodiment, and the first flow path 121 is arranged so as to be sandwiched by the two second flow paths 122. It was done.

Specifically, the length of the flat section of the heat dissipation tube 120 in the long side direction is set to be approximately double that of the first embodiment, and the inside is extruded by extrusion. A plurality of flow channels 121a are formed. Then, of the plurality of flow paths 121a, a portion that directly communicates with the internal space on the center side of the refrigerant tank 110 is formed as the first flow path 121 by the thick portion 115b forming the flow restricting means, and the refrigerant tank 110 Two portions that directly communicate with the outer (left and right in FIG. 9) internal space are formed as the second flow path 122.

In this second embodiment, the refrigerant tank 11
The refrigerant that has boiled and vaporized on the center side within 0 rises in the first flow path 121, flows into the two second flow paths 122 on the left and right sides, is condensed and liquefied, and returns to the refrigerant tank 110 again to cool the heating element 10. To do.

As a result, one heat dissipation tube 120 can form a refrigerant flow path corresponding to two heat dissipation tubes 120, and the number of heat dissipation tubes 120 can be reduced to reduce the cost.

(Third Embodiment) A third embodiment of the present invention is shown in FIGS. The third embodiment is different from the first embodiment in that the radiation fins 13 are provided between the radiation tubes 120.
0 is interposed to increase the heat dissipation area to improve the cooling performance.

The radiation fin 130 is basically the same as that shown in FIG.
As shown in FIG. 7, it is preferable to interpose between all the heat dissipation tubes 120 in order to increase the heat dissipation area.

Further, as shown in FIG. 11, when the cooling air is supplied by the blowing means, if the radiation fins 130 are interposed between the radiation tubes 120 on the lee side of the cooling air, the cooling air will be generated. Since the airflow resistance on the windward side can be reduced and the amount of air flowing into the heat dissipation tube 120 can be increased, the cooling performance can be adjusted in consideration of the balance between this airflow and the heat dissipation area by the heat dissipation fins 130.

(Fourth Embodiment) A fourth embodiment of the present invention is shown in FIGS. The fourth embodiment differs from the first embodiment in that the heat radiation tubes 120 are arranged in a staggered arrangement. In this embodiment, when the heating element 10 is small and the heat flow rate is high, the arrangement density of the heat radiating tubes 120 is increased so that the boiling refrigerant is intensively radiated to the heat radiating tubes 12.
It is possible to flow into the first channel 121 of 0. Also,
When the cooling air is supplied to the heat radiation tube 120, a turbulent flow effect is generated to increase the heat transfer coefficient and improve the cooling performance.

(Fifth Embodiment) FIG. 14 shows a fifth embodiment of the present invention. The fifth embodiment is different from the first embodiment in that the radiation tubes 120 are arranged radially. The heating element 10 is attached to a region corresponding to the central portion of the radiation tubes 120 arranged in a radial pattern.

As a result, when the cooling air is supplied from the longitudinal end side of the heat radiating tube 120 by the blowing means 150, air can be smoothly discharged along the heat radiating tube 120 to increase the ventilation amount. The cooling performance can be improved.

Further, the boiling refrigerant from the heating element 10 can be concentratedly flown into the first flow passage 121 of the heat radiating tube 120, and the refrigerant circulation can be made smoother to improve the cooling performance.

(Other Embodiments) In the above-described first to fifth embodiments, the coolant tank 110 includes a plurality of plates 111.
Although the description has been made on the assumption that the layers are formed by stacking ~ 115,
Not limited to this, as shown in FIG. 15, it may be formed as a box-shaped container. In this case, the flow restricting means 1
16 can be dealt with by being formed of a flat plate member and joined by brazing or the like. The flow restricting means 116
2 is not limited to the L-shaped cross section as shown in FIGS. 2 and 15, and may be a wall-shaped member that hangs from the partition wall 126 in the heat dissipation tube 120.

[Brief description of drawings]

FIG. 1 is a perspective view showing an entire boiling cooling device in a first embodiment of the present invention.

FIG. 2 is a sectional view showing the boiling cooling device in FIG.

FIG. 3 is a perspective view showing a tube portion and a closing member.

FIG. 4 is a perspective view showing each plate that constitutes a refrigerant tank.

FIG. 5 is a side view showing a layout of air blowing means when cooling air is supplied to the heat dissipation tube.

FIG. 6 is a cross-sectional view showing a modified example 1 of the heat dissipation tube.

7 (a) is a perspective view and FIG. 7 (b) is a sectional view showing a modified example 2 of the heat dissipation tube.

FIG. 8 is a sectional view showing a modified example of the boiling cooling device in the first embodiment.

FIG. 9 is a cross-sectional view showing a boiling cooling device in a second embodiment.

FIG. 10 is a plan view showing a boiling cooling device in a third embodiment.

FIG. 11 is a plan view showing a modified example of the boiling cooling device in the third embodiment.

FIG. 12 is a plan view showing a boiling cooling device in a fourth embodiment.

FIG. 13 is a plan view showing a modified example of the boiling cooling device in the fourth embodiment.

FIG. 14A is a plan view and FIG. 14B is a side view showing a boiling cooling device in a fifth embodiment.

FIG. 15 is a cross-sectional view showing a boiling cooling device according to another embodiment.

FIG. 16 is a perspective view showing a prototype of a boiling cooling device.

17 is a cross-sectional view showing the boiling cooling device in FIG.

[Explanation of symbols]

10 Heating Element 100 Boiling Cooling Device 110 Refrigerant Tank 113b, 114b, 115b Thick Part (Flow Restricting Means) 120 Radiating Tube 120a Tube Part 120b Closing Member 121 First Flow Path 122 Second Flow Path 121a, 122a Plural Flow Paths 123 Communication passage 124 End 125 Thin portion 130 Radiating fin

Claims (13)

[Claims] 1. A first passage (121) and a second passage (122) are provided inside, and a communication passage (123) is provided at one end side.
A heat dissipation tube (120) for communicating the first flow path (121) and the second flow path (122) with each other, and a heating element (10) on the lower surface side, and a refrigerant tank in which a refrigerant is stored (110), and the other end side of the heat dissipation tube (120) is connected to the anti-heating body side of the refrigerant tank (110), and the first flow path (121) and the second flow path are provided. A boiling cooling device characterized in that (122) is communicated with the inside of the refrigerant tank (110). 2. The first flow path (121) of the first flow path (121) and the second flow path (122) is arranged on the heating element (10) side. The boiling cooling device according to claim 1. 3. A flow restricting means for restricting a flow direction in the refrigerant tank (110) so that the refrigerant boiled and vaporized by the heating element (10) flows into the first flow path (121) side. 113b, 114b, 115b) are provided, The boiling cooling apparatus in any one of Claim 1 or Claim 2 characterized by the above-mentioned. 4. The tube portion (120) in which the first flow path (121) and the second flow path (122) are formed in the heat dissipation tube (120) by extrusion processing.
a) and a closing member (120b) joined to one end (124) of the tube portion (120a), the end (124) or the closing member (120b).
The first flow path (121) is provided inside at least one of the
And a thinned portion (125) that is thinned so as to straddle the second flow path (122). Boiling cooler. 5. The heat dissipation tube (120) has the first flow path (121) and the second flow path (122) formed therein by an extrusion process, and has one end (124) in the longitudinal direction. The inner side is composed of a tube portion (120a) provided with a thinned portion (125) that is thinned so as to straddle the first flow channel (121) and the second flow channel (122), and The boiling cooling device according to any one of claims 1 to 3, wherein a peripheral edge of the end portion (124) is crushed so that the contact portions are joined to each other. 6. The first flow path (121) and the second flow path (121)
In the flow channel (122), a plurality of flow channels (121a, 1a, 1a
22a) is formed, The boil cooling apparatus in any one of Claims 1-5 characterized by the above-mentioned. 7. The two second flow paths (122) are provided in one heat dissipation tube (120), and the first flow path (121) is the two second flow paths (12).
The boiling cooling device according to any one of claims 1 to 6, which is arranged so as to be sandwiched by 2). 8. The boiling cooling device according to claim 1, wherein a plurality of the heat radiation tubes (120) are provided in a predetermined arrangement. 9. The boil cooling apparatus according to claim 8, wherein a radiating fin (130) for expanding a radiating area is interposed between the plurality of radiating tubes (120) at least at a predetermined position. 10. Cooling air for promoting heat exchange with the refrigerant is supplied from one of the plurality of heat radiating tubes (120), and the heat radiating fins (130) radiate the heat on the lee side of the cooling air. The boiling cooling apparatus according to claim 9, wherein the tube (120) is interposed between the tubes. 11. The plurality of heat dissipation tubes (120)
The boil cooling apparatus according to claim 8, wherein the cooling tanks are arranged in a staggered pattern on the surface of the refrigerant tank (110). 12. The plurality of heat dissipation tubes (120)
The boil cooling apparatus according to claim 8, wherein the cooling tanks are arranged radially on the surface of the refrigerant tank (110). 13. The heating element (10) according to claim 12, wherein the heating element (10) is attached to a region corresponding to a central portion of the plurality of radially arranged heat radiation tubes (120). Boiling cooler.