JP2002286382A - Evaporation cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a evaporation cooler capable of easily changing its structure at a low cost so as to meet a necessary cooling performance. SOLUTION: A condenser 4 is constituted by laminating a plurality of unit plates 6 and two outside plates 7. The plurality of the plate 6 are superposed between two outside plates 7 in a thickness direction, and also provided in a planar direction in a size substantially equal to the entire shape of the three unit plates 6. Heat sink fins 5 are provided such that a width of its base 5a is substantially equal to that of the plates 6, and disposed in parallel similarly to the plates 6 for the one outside plate 7A. According to this constitution, the number of the plates 6 and the number of the fins 5 disposed in parallel with the plates 7 are increased or decreased, and hence the structure of a heat sink part (the condenser 4 and the fins 5) can be easily changed so as to meet the necessary cooling capacity.

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 by latent heat transfer due to boiling and condensation of a refrigerant.

[0002]

2. Description of the Related Art Conventionally, air-cooling fins made of aluminum or the like have been often used for cooling electronic device elements such as computer chips. Fins are no longer available.

Accordingly, a boiling cooling device has been developed which transfers the heat of the element to a refrigerant and cools the element by latent heat transfer due to boiling and condensation of the refrigerant.

[0004] As an example of a boiling cooling device using this refrigerant, there is JP-A-10-308486, for example. The boiling cooling device described in this publication, as shown in FIG.
Refrigerant container 100 configured by laminating a plurality of plates
And radiating fins 110 that are attached in contact with the radiating surface of the refrigerant container 100.

[0005]

The above-described boiling cooling apparatus can cope with various cooling capacities by changing the vertical width of the refrigerant container 100 by increasing or decreasing the number of plates constituting the refrigerant container 100. It is possible. However, since the surface area of the plate is constant, it is difficult to significantly change the shape of the radiation fin 110 even when the capacity of the refrigerant container 100 changes. In other words, the radiating fin 110 as shown in FIG. 7 is generally made of an extruded product of aluminum. Therefore, in order to change the shape of the radiating fin 110, it is necessary to design a new extrusion die, which is extremely costly. Will be expensive.

Although it is relatively easy to change the upper and lower widths of the refrigerant container 100, if the heat receiving area and the heat radiation area are largely changed according to the number of heating elements 120, the amount of heat generation, and the like, the Since it is necessary to change the size of a typical plate, the cost required for a press die for manufacturing the plate increases.

[0007] As another example of a conventionally known boiling cooling device, as shown in FIG.
There is also known a structure having a heat dissipation core portion 520 including a tube 540 connected to the refrigerant container 510, and a header tank 560 connected to the other end of the tube 540. Refrigerant container 510 and header tank 5
Numeral 60 is composed of a plurality of stacked plates, which are connected by being inserted into openings formed in the plates.

In the boiling cooling device 500 having such a structure, the cooling capacity on the refrigerant side adjusted by the pressure loss of the refrigerant passing through each tube 540 and the ventilation resistance of the air passing through the heat radiation core 520 are adjusted. By balancing the cooling capacity on the air side to be performed, the heat radiation capacity of the boiling cooling device 500 is adjusted. One of the means for adjusting the pressure loss of the refrigerant and the ventilation resistance is to change the interval between the tubes 540. However, in the case of a boiling cooling device having a structure like the above-described boiling cooling device 500, in order to change the interval between the tubes 540,
The number of openings in the plate through which the tubes are inserted also needs to be changed. Therefore, the cost required for a press die for manufacturing a plate with a changed number of openings increases.

[0009] Further, the boiling cooling device 5 having such a structure.
In the case of 00, if the refrigerant container 510 and the header tank 560 are close to each other or if the distance between the tubes 540 is small, it is difficult to insert the assembling jig.
Complicated work is required to assemble the tube 540 disposed at the center.

The present invention has been made based on the above circumstances, and an object of the present invention is to provide a boiling cooling apparatus which can easily and inexpensively change its size according to a required cooling capacity.

[0011]

According to a first aspect of the present invention, a plurality of unit plates having the same shape are sandwiched between two outer plates in a plate thickness direction. On the surface of one of the outer plates, a radiating fin provided with substantially the same width as the unit plate is attached, and when the refrigerant vapor that has been heated and vaporized by the heat of the heating element flows through the slit provided in the unit plate, A stacked cooling device in which the heat of the refrigerant vapor is released from one outer plate to the outside through radiation fins, wherein two or more unit plates are provided in parallel with two outer plates. The heat radiation fins are arranged and attached to one outer plate in parallel with the number of unit plates arranged in parallel.

According to this structure, the number of unit plates arranged in parallel with the outer plate can be increased or decreased according to the required cooling capacity, and the number of heat radiation fins can be changed accordingly. As a result, even when changing the size of the cooling device, it is not necessary to change the shapes of the unit plates and the radiation fins to be used, and common parts can be used. In addition, the physique can be easily changed.

Furthermore, according to the second aspect of the present invention, the required cooling performance can be easily secured by changing the size of the header according to the number of unit plates arranged in parallel with the two outer plates. can do.

According to the third aspect of the present invention, the size of the condensing portion can be easily changed, and the heat radiation performance can be easily changed by changing the size. Further, since the boiling section and the condensing section are connected by a pipe, the heat radiation performance can be changed by increasing or decreasing the number of pipes.

According to the fourth aspect of the present invention, the physical size of the refrigerant container can be easily changed, and the heat radiation performance can be easily changed by the physical size change.

According to a fifth aspect of the present invention, there are provided a plurality of tubes through which a refrigerant passes, and a heating element mounted on the bottom surface, connected to one end of the tubes, and connected to the tubes. A refrigerant container in which the refrigerant is sealed,
A header tank connected to the other end of the tube and communicating the tubes with each other, and allowing the refrigerant in the refrigerant container to boil and evaporate by the heat of the heating element into the tube to exchange heat with outside air. A plurality of tubes, wherein a tube group consisting of the tubes arranged in parallel, and both ends of the tubes are inserted, and a unit corresponding to the size of each tube group is provided. And a core unit including a plate, and a plurality of the core units are arranged.

According to this configuration, the cooling performance can be easily adjusted by changing the number of core units or combining core units having different cooling performances. In addition, since the tube groups constituting each core plate are arranged in parallel, a jig can be easily inserted between the tubes, and a complicated assembling operation is not required. In particular, according to the present invention, since a cooling device is configured by arranging a plurality of core units each having a tube assembled to a unit plate, the interval between the tubes is narrow, or the core units having different tube intervals are combined. Even if it does, complicated work is not required for assembling the tube arranged in the center of the cooling device.

According to the thirteenth aspect of the present invention, the unit plates can be fixed to each other by the insert, and the tubes can be prevented from falling off during transportation.

According to the fourteenth aspect of the present invention, a plurality of plates stacked to form a refrigerant container or a header tank can be fixed.

According to the sixteenth aspect of the present invention, the fins can be inserted between the tubes by inserting the fins in the ventilation direction, and a complicated assembling operation is not required.

[0021]

Next, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment) FIG. 1 is an exploded perspective view of a heat dissipating portion (condensing portion 4 and heat dissipating fins 5), and FIG. 2 is a perspective view showing a state where the heat dissipating portion is assembled.

The boiling cooling device 1 of this embodiment cools a heating element (not shown) by latent heat transfer due to boiling and condensation of the refrigerant. As shown in FIG. This boiling part 2 and pipe 3 (3A, 3B)
And a radiating fin 5. The condenser 4 and the radiation fins 5 are assembled as shown in FIG. 2 to form a radiation.

The material used for the boiling part 2, the condensing part 4, and the pipe 3 (3A, 3B) is, for example, aluminum, and this boiling cooling device 1 is manufactured by integrally brazing after assembling the respective parts. .

The boiling portion 2 is a thin box-shaped container having a heating element (for example, a heating element such as a computer chip) mounted on the surface thereof, and a liquid which boils and evaporates by receiving heat from the heating element. Refrigerant is stored. Mounting holes (not shown) for mounting the pipes 3 are respectively opened on the upper surface and the lower surface of the container forming the boiling portion 2.

The pipe 3 has a vapor pipe 3A for sending the refrigerant vapor which has been vaporized and boiled in the boiling section 2 to the condensing section 4, and returns the condensed liquid which has been cooled and liquefied by the cooling of the refrigerant vapor in the condensing section 4. And a condensate pipe 3B are provided.

As shown in FIG. 1, the condensing section 4 includes a plurality of unit plates 6 and two outer plates 7 (7A, 7B),
And a set of headers 8 (8A, 8B).

As shown in FIG. 1, the unit plate 6 has a plurality of slits 6a forming a condensation passage extending in the plate longitudinal direction (vertical direction in FIG. 1) and opening. A plurality of unit plates 6 are stacked in the thickness direction between two outer plates 7, and two or more (three in FIG. 1) are arranged in parallel also in the plane direction.

The two outer plates 7 are provided in a size substantially equal to the overall shape of the three unit plates 6 arranged in parallel.

As shown in FIG. 1, the other outer plate 7B is provided with a total of six openings 9 at three locations at both ends of the plate corresponding to the longitudinal direction of the unit plate 6. The opening 9 communicates with both ends of the slit 6 a formed in the unit plate 6 and is arranged in parallel.
It is provided for each of the unit plates 6.

In the following description, the three openings 9 opening at the upper end of the other outer plate 7B are called steam inlets 9a, respectively, and the three openings 9 opening at the lower end of the other outer plate 7B. The openings 9 are respectively connected to the liquid outlets 9b.
Call.

The header 8 is provided with a vapor header 8A communicating with the vapor inlets 9a and a liquid header 8B communicating with the liquid outlets 9b. The mounting holes 8a and 8b are open.

The radiating fins 5 are, for example, extruded materials of aluminum, and a plurality of radiating plates 5b are provided upright on a substrate 5a with a predetermined interval. The radiating fins 5 are provided so that the width of the substrate 5a is substantially equal to the width of the unit plate 6, and are arranged in parallel to one of the outer plates 7A in the same manner as the unit plate 6.

Next, the operation of this embodiment will be described.

The refrigerant vapor that has been vaporized by receiving heat from the heating element in the boiling section 2 passes through the vapor pipe 3A and passes through the vapor side header 8
A, and flows into the slits 6a of each unit plate 6 from the steam inlet 9a. The refrigerant vapor flowing into each slit 6a radiates and condenses while flowing downward by gravity, flows into the liquid side header 8B from the liquid outlet 9b, and then returns to the boiling portion 2 through the condensed liquid pipe 3B. .

The heating element is cooled by the latent heat transfer due to the boiling and condensation of the refrigerant, and the latent heat of condensation of the refrigerant is released from one outer plate 7A to the atmosphere through the radiation fins 5.

(Effect of this embodiment) Condensing section 4 of this embodiment
Means that the unit plate 6 is 2
At least one radiating fin 5 is provided in parallel with one outer plate 7A. According to this configuration, the number of unit plates 6 arranged in parallel with the outer plate 7 and the radiation fins 5
By increasing or decreasing the number of heat sinks, the physical size of the heat radiating portion (the condensing portion 4 and the heat radiating fins 5) can be easily changed according to the required cooling capacity.

In this case, it is not necessary to change the shapes of the unit plate 6 and the radiation fins 5 to be used, and common parts can be used. Therefore, an extrusion die for forming the radiation fins 5 and a unit plate 6 are manufactured. Since the press dies can be used in common, component manufacturing costs can be significantly reduced.

When the radiation fins 5 are formed by extrusion, a narrow extrusion die can be used, which also has the effect of reducing mold costs.

(Second Embodiment) FIG. 4 is a perspective view showing the overall shape of the boiling cooling device 1.

The boiling cooling device 1 of this embodiment is an example in which a plurality of steam pipes 3A or condensate pipes 3B connecting the boiling section 2 and the condenser section 4 are used.

For example, as shown in FIG.
By using three, the flow of the refrigerant vapor flowing out of the boiling part 2 can be made smoother, so that the refrigerant can be circulated favorably and the heat radiation performance can be improved.

(Third Embodiment) FIG. 5 is a perspective view showing the overall shape of the boiling cooling device 1.

In the boiling cooling device 1 of the present embodiment, a sealed refrigerant container 10 is formed by laminating two outer plates 7 and a plurality of unit plates 6, and the refrigerant boils in the refrigerant container 10. This is an example of a configuration in which the condensation is repeated. That is, the configuration of the condenser 4 described in the first embodiment is applied to the refrigerant container 10.

As in the first embodiment, a plurality of radiation fins 5 are arranged and mounted on one outer plate 7A in parallel. A heating element (not shown) is attached to the surface of the other outer plate 7B.

Also in this embodiment, by increasing or decreasing the number of unit plates 6 arranged in parallel with the outer plate 7, the refrigerant container 10 can be easily adjusted to the required cooling capacity.
Can be changed, and the number of the radiation fins 5 can be easily changed.

In this case, it is not necessary to change the shapes of the unit plate 6 and the radiation fins 5 to be used, and common parts can be used. Therefore, an extrusion die for molding the radiation fins 5 and a unit plate 6 are manufactured. Since the press dies can be used in common, component manufacturing costs can be significantly reduced.

(Fourth Embodiment) FIG. 6 is a perspective view showing the overall shape of the boiling cooling device 1.

The boiling cooling device 1 of this embodiment is similar to the third embodiment, except that a closed refrigerant container 10 is formed by laminating two outer plates 7 and a plurality of unit plates 6. It is an example.

However, in the refrigerant container 10, four unit plates 6 are arranged in parallel with two outer plates 7, and four radiating fins 5 are arranged in parallel.

According to this configuration, as shown in FIG. 6, the vapor header 8A and the liquid header 8B can each be divided into two parts. In this case, there is an advantage that common parts can be used even if the number of headers 8 increases.

By increasing the number of unit plates 6 and the number of radiating fins 5 arranged in parallel with the two outer plates 7 as in this embodiment, boiling cooling can be easily performed according to the required cooling capacity. The physique of the device 1 can be increased.

(Fifth Embodiment) FIG. 8 is a side view showing the overall shape of a boiling cooling device.

The evaporative cooling device according to the fifth embodiment shown in FIG. 8 includes a refrigerant container 20 having a refrigerant chamber in which a predetermined amount of refrigerant is enclosed, and a refrigerant enclosed in the refrigerant container 20. And a heat radiating core part 30 for radiating heat.
One end of the heat radiation core 30 is connected to the refrigerant container 20, and the plurality of flat tubes 80 communicate with the inside of the refrigerant container 60.
And the other ends of the plurality of tubes 80 are connected,
It has a header tank 90 that connects the tubes 80 to each other, and a radiation fin 101 that is arranged between the tubes 80 and that is in thermal contact with the tubes 80.

The tube 80 is a flat tube, and a tube group 8 in which a plurality of (in this embodiment, 16) tubes 80 are arranged in a row so that the flat surfaces thereof are substantially parallel.
0A are arranged in parallel (five in this embodiment). The heat dissipating fins 101 are well-known corrugated fins, and increase the heat dissipating area.

A plurality of refrigerant containers 20 (6 in this embodiment)
(Plates) are stacked. Six plates 60 constituting the refrigerant container 20
(See FIG. 9) is a press material punched out of, for example, an aluminum plate or a stainless steel plate by a press die,
A core plate 60A arranged outside the refrigerant container 20 and connected to the tube 80, a heat receiving plate 60B arranged outside the refrigerant container 20 and fixing the heating element 40, and a core plate 60A and the heat receiving plate 60B It consists of an intermediate plate 60C-F sandwiched between.

The heat radiation plate 60A shown in FIG. 9A is provided with a plurality of openings 60a through which the tubes 80 pass. The core plate 60A includes a plurality of unit plates 600, which will be described later.

The intermediate plate C shown in FIG. 9C has an opening 60 communicating with the opening 60a of the core plate 60A.
c are formed in plurality.

The intermediate plate 60D shown in FIG. 9D has a plurality of openings 60d communicating with the openings 60c. In the intermediate plate 60E shown in FIG. 9E, a plurality of slit-shaped openings 60e are formed in a vertical direction (a direction orthogonal to the longitudinal direction of the intermediate plate 60E) over substantially the entire surface. The intermediate plate 6 shown in FIG.
At 0F, a plurality of slit-shaped openings 60f are formed in substantially the entire lateral direction (the longitudinal direction of the intermediate plate 60F).

Core plate 60A, heat receiving plate 60
B, by stacking the intermediate plates 60C to 60F,
The openings 60 a and 60 c to f communicate with each other to form a space inside the refrigerant container 2.

The header tank 90 includes a plurality of plates 60
Are laminated, and the detailed structure thereof is the same as that of the refrigerant container 20, so that the detailed description is omitted.

The core plate 60A is a single unit plate 600 composed of two or more (five in this embodiment) unit plates 600 arranged in parallel in the plane direction.
Has a size such that the tubes 80 of one tube group 80A can be connected.

The unit plates 600, 1 on the refrigerant container 20 side
Tubes 80 for rows, radiation fins 101 arranged between tubes 80, unit plate 600 on header tank 90 side
Are assembled, and constitute the core unit 300 as shown in FIG.

Heat receiving plate 60B, intermediate plate 60C
F have a size substantially equal to the overall shape of the five unit plates 600 arranged in parallel, and constitute the refrigerant container 20 by being stacked. As shown in FIG. 11A, a plurality of core units 300 are assembled on the stacked heat receiving plate 60B and intermediate plates 60C to 60F. Further, the evaporative cooling device 10 is assembled by assembling the plate 60B and the intermediate plates 60C to 60F stacked above the core unit 300 in FIG. 11B. After being assembled in this manner, the evaporative cooling device 10 is integrally brazed, for example, in a vacuum atmosphere.

The boundary line between the core units 300 of the intermediate plate 60C, that is,
A seal portion 60 for sealing the gap is provided at a portion facing the gap between adjacent unit plates 600.
b is provided to prevent the refrigerant enclosed in the refrigerant container 20 from leaking out through the gap between the adjacent unit plates 600.

Next, the operation of this embodiment will be described.

As shown in FIG. 8, in the boiling cooling device 10 of this embodiment, the heating element 4 is disposed below the refrigerant container 20 and the heat radiation core 30 is disposed above the refrigerant container 20. Used in posture (called bottom posture).

The refrigerant stored in the refrigerant container 20 boil and vaporize by receiving heat from the heating element 4, and the tubes 8 arranged in the area where the heating element 4 is mounted and in the vicinity thereof are provided.
0 and flows into the header tank 90. The inflowing refrigerant vapor is cooled and condensed while diffusing inside the header tank 90, and becomes condensed liquid to form another tube 80.
(Tube 8 arranged outside the mounting range of heating element 4)
The refrigerant is returned to the refrigerant container 20 via the line (0). As a result, the heat of the heating element 4 is transmitted to the refrigerant and transported to the radiating core 30, and is radiated as condensation latent heat when the refrigerant vapor condenses in the radiating core 30, and is radiated to the outside air through the radiating fins 101. You.

(Effect of this embodiment) In the above embodiment, since the core plate 60A is constituted by the plurality of unit plates 600, the radiation core portion 30 is provided for each tube group 80A.
Can be divided into a plurality of core units 300. With such a structure, it is possible to easily change the heat radiation performance of the heat radiation core portion 30 in accordance with a required heat radiation amount by combining different core units 300. Specifically, as shown in FIG. 12 (a), a core unit 300b (see FIG. 12 (b)) having no heat radiation fins 101 is arranged at the center of the heat radiation core 30.
Core unit 3 having radiation fins 101 around it
00a (see FIG. 12 (c)). With such a combination, it is possible to adjust the ventilation resistance of the cooling air of the entire boiling cooling device 11.

The pressure loss of the refrigerant can be adjusted by combining core units 300c and 300d having different tube pitches as shown in FIGS. 13 (a) and 13 (b). Further, as shown in FIG. 14, only the core unit 300e disposed near the heating element 4 uses the core plate 60A having the protruding portion 61, and the refrigerant container 20e is locally provided.
Can be configured to have a large volume. With such a structure, the amount of refrigerant passing near the heating element 4 can be increased, and a heating element having a larger heating value can be attached.

Particularly, in the present embodiment, the core plate 60
0, the tube 80 and the fins 101 to the core unit 300
After assembling the core unit 300 into the refrigerant container 2
And the fin 10 between the tubes 80 without any special jig.
2 can be easily assembled.

Since the tube group 80A arranged so that the flat surfaces thereof are substantially parallel is formed as one core unit 300, the fins 101 can be easily assembled between the tubes 80.

In the above-described embodiment, the refrigerant container 20
And the header tank 90 has a laminated structure.
As shown in FIG. 7, the refrigerant container 20 and the header tank 90 may be hollow. When the refrigerant container 20 and the header tank 90 have a hollow shape, a step 20a is formed at the opening edge of the refrigerant container 20 and the header tank 90 as shown in FIG. It is good also as a structure which the edge part of 60A contacts. Thus, by forming the step 20a at the opening edge of the refrigerant container 20 and the header tank 90, the core unit 300 is formed.
Can be easily determined. In addition, all the core units 300 of the heat radiation core 30 are connected to the tubes 80.
A structure in which the heat radiation fins 101 are not provided between them may be adopted.

(Sixth Embodiment) In the fifth embodiment, a boiling cooling apparatus using a core unit having a heat radiating plate, a tube, and a fin has been described. As a core unit, FIGS. 16A and 16B are used. Thus, the core unit 300f in which the insert 62 is provided outside the outermost tube 80 may be used. The insert 62 is a plate-shaped member made of, for example, an aluminum plate or a stainless steel plate, and both ends thereof are inserted into openings formed in the core plate 60A. Openings through which both ends of the insert 62 are inserted are formed in the intermediate plates 60C to 60F to which the core unit 300f is assembled, and the inserts 62 are passed through the openings to form the plates 60C to 60F. Positioning is performed.

In this embodiment, the core unit 300
f is fixed by inserts 62 on both sides, so that the core unit 300f
When transporting, the tubes 80 from the core plate 60A
Can be prevented from falling off.

(Seventh Embodiment) As shown in FIGS. 17 and 18, the outermost heat receiving plate 6 among the plates 60 constituting the refrigerant container 20 and the header tank 90 is provided.
It is also possible to provide a pawl 60d at 0B and to caulk and fix the other plates 60A, 60C to 60F with the claw 60d. When assembling the boiling cooling device, the laminated core plate 60A and the intermediate plates 60C to 60F are caulked and fixed by the claw portions 60d, so that brazing is performed without requiring a special fixing jig. Can be.

(Eighth Embodiment) As a group of tubes constituting a core unit 300, as shown in FIG. 19, tubes 80 arranged in parallel in the same direction as the ventilation direction are formed into one tube group 80B, and a core unit 300g It may be.

(Ninth Embodiment) In the above embodiment, corrugated fins are used as radiation fins. However, as described below, fins obtained by bending a plate material into a U-shape are used. You may.

FIG. 20 is a perspective view of the boiling cooling device in this embodiment, FIG. 21 is a sectional view taken along line AA of FIG. 20, and FIG. 22 is a sectional view taken along line BB of FIG. FIG. 23 is a perspective view of the radiation fin in the present embodiment.

As shown in FIG. 20, the boiling cooling device includes a refrigerant container 20 and a radiating core 30. The components having substantially the same structure as in the fifth embodiment are denoted by the same reference numerals, and detailed description is omitted.

The refrigerant container 20 is composed of a plurality of (four in this embodiment) plates 60 stacked. Among the plates 60, the plate arranged on the heat radiation core portion 30 side is a core plate 60A, and is composed of a plurality of unit plates 600 arranged in parallel in the plane direction. Each unit plate 600 has an opening (not shown) formed therein.
Are connected at one end.

The outermost plate (lower in FIG. 20) of the plate 60 is a heat receiving plate 60B, and a heating element (not shown) is attached to the center of the bottom surface. The plates disposed between the core plate 60A and the heat receiving plate 60B are the intermediate plates 60C and D, and have an opening (not shown) communicating with the tube 80.

The header tank 90 disposed above the tube 80 is composed of a plurality of (three in this embodiment) plates 60 stacked. Refrigerant container 20 of plate 60
The plate arranged on the side is a core plate 60A, which is composed of a plurality of unit plates 600 arranged in parallel in the plane direction. An opening (not shown) is formed in each unit plate 600, and the other end of the tube 80 is connected.

The fin 102 made of a plate material is bent substantially perpendicularly from the base portion 102 a extending in the width direction of the heat radiation core portion 30 (the same direction as the ventilation direction) and comes into contact with the wall surface of the tube 80. It has a wall portion 102b to be brazed and a bent portion 102c that is bent substantially vertically from the wall portion 102b. Base part 102a
Extends almost the entire length of the heat radiation core 30 in the ventilation direction, and has a leeward side wall portion 111a in contact with the tube 80 on the most leeward side and a leeward side wall portion 111b in contact with the tube on the leeward side. Base 102 of fin 102
In FIG. 7A, the vicinity of the wall portion 102b is cut and raised to form a louver 102c for improving heat radiation performance.

The fins 102 are assembled by being inserted between the tubes 80, and are stacked in the longitudinal direction of the tubes 80. At this time, the bent portion 102c and the fin 10
2 is in contact with the base portion 102a, and the fin 102
Have a predetermined interval between the base portions 102a, and form an air passage through which cooling air passes.

As described above, in this embodiment, the fin 102
Since the base portion 102a extends over substantially the entire length of the heat radiation core portion 30 in the ventilation direction, the base portion 102a can be assembled by inserting the fins 102 between the tubes 80. It can be done easily. Further, since the plurality of fins 102 are stacked at a predetermined interval in the longitudinal direction of the tube 80, when the fins 102 are assembled to the heat radiation core portion 30, the height of the stacked fins 102 causes the tube 80 to be positioned with respect to the core plate 60A. Can be defined. Also, the fin 102 arranged at the uppermost stage
And the core plate 60A on the header tank 90 side, and the base portion 102a of the fin 102 arranged at the lowest stage and the core plate 60A on the refrigerant container 20 side are in contact with each other. The root portion of the tube 80 can be held. Furthermore, even if there is a gap between the opening of the core plate 60A and the tube 80, the brazing material can be supplied from the fin 102, and the brazing failure of the root portion of the tube 80 can be prevented.

In the above embodiment, the base portion 102a
Although the embodiment in which the louver 102c is formed has been described,
Fins without louvers may be used. Further, in the above embodiment, all the wall portions 10 formed on the base portion 102a are formed.
2b was brazed to the wall surface of the abutting tube 80, but the tube wall near the center of the heat dissipation core and the fin wall were not brazed, and the wall surface of the surrounding tube and the fin were not brazed. The wall may be brazed.

(Tenth Embodiment) As the radiation fin, a structure using a plate fin may be used. FIG. 24 is a diagram showing the boiling cooling device of the present embodiment. FIG. 24 (a) is a diagram viewed from a direction substantially perpendicular to the ventilation direction, and FIG. 24 (b) is a diagram viewed from the ventilation direction. . FIG. 25 is a partially enlarged view of the fin applied to the present embodiment. The components having substantially the same structure as in the fifth embodiment are denoted by the same reference numerals, and detailed description is omitted.

A plurality of plate fins 103 are inserted through the tube 80. In the plate fin 103,
An opening 103a through which the tube is inserted and a cut-and-raised portion 103b as a louver are formed. This raised and raised portion 103
“b” has a height that abuts on the plate fins 103 that are stacked adjacent to each other, and serves as an interval maintaining member that maintains the interval between the plate fins 103.

According to the present embodiment, there is no need for an assembling jig for maintaining the interval between the plate fins 103 by the cut-and-raised portion 103b, and the work efficiency of the assembling work can be improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a heat radiating portion (a condenser portion and a heat radiating fin) (first embodiment).

FIG. 2 is a perspective view showing a state in which a heat radiating unit is assembled (first embodiment).

FIG. 3 is a perspective view showing the overall shape of the boiling cooling device (first embodiment).

FIG. 4 is a perspective view showing an overall shape of a boiling cooling device (second embodiment).

FIG. 5 is a perspective view showing an overall shape of a boiling cooling device (third embodiment).

FIG. 6 is a perspective view showing the overall shape of a boiling cooling device (fourth embodiment).

FIG. 7 is a perspective view showing the overall shape of a boiling cooling device (prior art 1).

FIG. 8 is a schematic front view of a boiling cooling device (fifth embodiment).

FIG. 9 is a view showing the shape of each plate constituting a refrigerant container and a header tank (fifth embodiment).

FIG. 10 is a perspective view of a core unit (fifth embodiment).

11A and 11B are diagrams illustrating a method of assembling the core unit, wherein FIG. 11A illustrates a state where the core unit is assembled to the refrigerant container, and FIG. 11B illustrates a state where the header tank is assembled to the core unit. It is a figure (5th Example).

FIG. 12 (a) is a schematic front view of a boiling cooling device as a modification of the fifth embodiment, and FIGS. 12 (b) and 12 (c) are diagrams (a).
FIG. 5 is a perspective view of a core unit assembled in the boiling cooling device of FIG.

FIGS. 13A and 13B are perspective views of a core unit applicable as a modification of the fifth embodiment.

FIG. 14 is a schematic front view of a boiling cooling device according to a modification of the fifth embodiment.

15A and 15B are diagrams showing a modification of the fifth embodiment, wherein FIG. 15A shows a state where a core unit is assembled to a refrigerant container, and FIG. 15B shows a state where a header tank is assembled to the core unit. It is a figure which shows, and figure (c) is the principal part enlarged view of this modification.

FIG. 16 is a view showing a sixth embodiment, wherein FIG. 16 (a) is a perspective view of a core unit, and FIG. 16 (b) is a front sectional view of a boiling cooling device.

FIG. 17 is a view showing a seventh embodiment, wherein FIG. 17 (a) is a view seen from a direction substantially perpendicular to the ventilation direction of the boiling cooling device, and FIG. 17 (b) is a view seen from the ventilation direction. .

FIG. 18 is a view showing a plate in the seventh embodiment.

FIG. 19 is a view showing an eighth embodiment, wherein FIG. 19 (a) is a perspective view showing a core unit, and FIG. 19 (b) is a view showing a method of assembling a boiling cooling device.

FIG. 20 is a perspective view illustrating a boiling cooling device according to a ninth embodiment.

21 is a sectional view taken along line AA of FIG.

FIG. 22 is a sectional view taken along line BB of FIG. 20;

FIG. 23 is a perspective view of a fin in the ninth embodiment.

24A and 24B are diagrams illustrating a boiling cooling device according to a tenth embodiment, where FIG. 24A is a diagram viewed from a direction substantially perpendicular to a ventilation direction, and FIG. FIG.

FIG. 25 is a partially enlarged view of a fin in the tenth embodiment.

FIG. 26 is a perspective view showing the overall shape of a boiling cooling device (prior art).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Boiling cooling device 2 Boiling part 3A Steam pipe 3B Condensed liquid pipe 4 Condensing part 5 Radiating fin 6 Unit plate 6a Slit 7A One outer plate 7B The other outer plate 8A Steam header 8B Liquid header 9a Steam inlet (opening) 9b Liquid outlet (opening) 10 Refrigerant container

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court II (Reference) H01L 23/427 H01L 23/46 A (72) Inventor Koji Tanaka 1-1-1 Showa-cho, Kariya-shi, Aichi Stock Inside Company Denso (72) Inventor Yuhei Kunigata 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Inside Company Denso (72) Inventor Hiroo Yamaguchi 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture F Term (reference) 5F036 BA07 BB05

Claims (17)

[Claims] 1. A plurality of unit plates having the same shape are sandwiched between two outer plates in a plate thickness direction.
On the surface of one of the two outer plates, a radiating fin provided at substantially the same width as the unit plate is attached, and refrigerant vapor that has been heated and vaporized by receiving heat from a heating element is applied to the unit plate. A laminated cooling boiler in which the heat of the refrigerant vapor is released from the one outer plate to the outside through the radiation fins when flowing through the slit provided, wherein the unit is provided with respect to the two outer plates. Plate 2
A plurality of the heat-dissipating fins are arranged and attached to the one outer plate by the number of the unit plates arranged in parallel. Cooling system. 2. The boiling cooling device according to claim 1, wherein the other of the two outer plates has a plurality of openings communicating with the slits for each unit plate arranged in parallel. And a header for communicating the slits of the unit plates through the openings is provided. 3. The boiling cooling device according to claim 1, wherein the heating element is mounted on a surface of the cooling unit, and a boiling part for storing a liquid refrigerant therein, and condensing refrigerant vapor which has been vaporized by the boiling part. A condenser section, wherein the condenser section is configured by laminating a plurality of the unit plates between the two outer plates, and the boiling section and the condenser section are connected via a pipe. A boiling cooling device. 4. The boiling cooling device according to claim 1, wherein a plurality of the unit plates are stacked between the two outer plates to form a sealed refrigerant container, A boiling cooling device, wherein the heating element is attached to the surface of the other outer plate of the outer plates, and boiling and condensation of the refrigerant are repeated in the refrigerant container. 5. A plurality of tubes through which the refrigerant passes, a refrigerant container having a heating element attached to the bottom surface, connected to one end of the tubes, communicating with the tubes, and containing the refrigerant therein. A header tank connected to the other end of the tube and communicating the tubes with each other, and causing the refrigerant inside the refrigerant container to boil and evaporate by the heat of the heating element into the tube to exchange heat with outside air. A boiling group cooling device that cools by cooling, wherein a tube group consisting of the tubes arranged in parallel, and both ends of the tubes are inserted through the plurality of tubes, and a unit corresponding to the size of each tube group is provided. A boiling cooling device, comprising: a core unit having a plate and a plurality of the core units. 6. The boiling cooling device according to claim 5, wherein the tube group includes the tubes arranged in parallel in a direction intersecting with a direction in which the cooling air flows. 7. The boiling cooling device according to claim 5, wherein the tube group is composed of the tubes arranged in parallel in a cooling air flow direction. 8. The boiling cooling device according to claim 5, wherein each of the refrigerant container and the header tank is a laminated structure in which a plurality of flat members are stacked. . 9. The apparatus according to claim 5, wherein the core unit has fins disposed in an air passage between the tubes. 10. The apparatus according to claim 9, wherein the fin is a corrugated fin. 11. The boiling cooling device according to claim 5, wherein the core units having different ventilation resistances are mixed. 12. The boiling cooling device according to claim 5, wherein the core units having different intervals between the tubes are mixed. 13. An apparatus according to claim 5, further comprising an insert inserted into the unit plate outside the tube group in the stacking direction.
The boiling cooling device according to any one of the above. 14. The boiling cooling according to claim 8, wherein the outermost flat plate member among the flat plate members has a claw portion, and the plurality of flat plate members are fixed by the claw portion. apparatus. 15. The boiling cooling apparatus according to claim 5, wherein the tube is a flat tube. 16. The fin has a plate-like base portion extending in the ventilation direction, and a wall portion bent from the base portion and abutting against a wall surface of the tube, and the fins are stacked in a longitudinal direction of the tube. The boiling cooling device according to claim 15, wherein: 17. The base portion, comprising: a leeward side wall portion in contact with a tube arranged most leeward of the plurality of tubes; and a leeward side wall portion in contact with a tube arranged most leeward side. 17. The boiling cooling device according to claim 16, wherein the elongate extends from the upwind tube to the downwind tube.