JP6095160B2 - Heat receiver - Google Patents

Description

  The present invention relates to a heat receiver that absorbs heat of an object to be cooled such as an electronic component that generates heat.

  In general, a cooling device for cooling an object to be cooled, such as an electronic component that generates heat, includes a heat receiver that absorbs heat generated in the object to be cooled, and a heat exchanger that takes heat away from the refrigerant that has absorbed heat. And a tank for storing the refrigerant and a pump for supplying the refrigerant to the heat receiver, and cooling the object to be cooled by circulating the refrigerant in the heat receiver, the heat exchanger, the tank, and the pump. It is carried out.

  Conventionally, as a heat receiver 80 used in this type of cooling device, as shown in FIGS. 7 and 8, two flat heat receiving portions 81 and 91 provided with a gap 93 therebetween, and the heat receiving portion 81. , 91 and a pair of header pipes 82, 83 joined to both ends, and a heat receiver 80 in which a refrigerant inlet 88 and an outlet 89 are provided in the same header pipe 82. Note that both ends of each of the header pipes 82 and 83 are closed by end caps 84 to 87.

  In this case, the first header pipe 82 is provided with a partition plate 92 that divides the inside, and the refrigerant flowing from the inlet 88 by the partition plate 92 allows the first header pipe 82, the first header pipe 82, and the first header pipe 82. The heat receiving portion 81, the second header pipe 83, and the second heat receiving portion 91 are discharged from an outlet 89 provided in the first header pipe 82. At this time, the heat of the electronic component 96 provided below the heat receiver 80 is absorbed by the refrigerant in the first heat receiving unit 81 and the second heat receiving unit 91.

  However, since the heat receiver 80 uses the two heat receiving portions 81 and 91, the heat receiver 80 is enlarged. Further, since the refrigerant does not flow in the gap 93 between the heat receiving portions 81 and 91, the cooling efficiency is lowered. When the gap 93 is reduced in order to improve the cooling efficiency, it becomes difficult to process the fitting groove for fitting the two flat heat receiving portions 81, 91 to the header pipes 82, 83, etc. There is a problem.

  As a heat receiver that solves the problem of cooling efficiency, by providing a partition wall in one flat tube, a first heat receiver that circulates refrigerant from the first header pipe toward the second header pipe, 2. Description of the Related Art A heat receiver is known in which a second heat receiving portion that circulates a refrigerant from two header pipes toward a first header pipe is formed by a single flat tube (see, for example, Patent Document 1).

JP 2012-54446 A (paragraph 0020, FIGS. 4 and 5)

  However, in the thing of patent document 1, mention is not made about the joining structure of the header pipe which has a partition plate, and the flat tube which forms a heat receiving part. However, joining of the header pipe having the partition plate and the flat tube (heat receiving portion) is important, and if the joining is insufficient, there is a concern that the cooling efficiency is lowered due to leakage of the refrigerant or the like. Therefore, there is a demand for a heat receiver that can facilitate the joining of the header pipe having the partition plate and the flat tube (heat receiving part) and can increase the accuracy of the joining part.

  The present invention has been made in view of the above circumstances, and provides a heat receiver that can facilitate the joining of a header pipe having a partition plate and a flat heat receiving portion and can increase the accuracy of the joining portion. Is an issue.

In order to achieve the above object, a heat receiver according to the present invention includes a flat aluminum heat receiving portion that absorbs heat of an object to be cooled, an aluminum first header pipe that communicates with both ends of the heat receiving portion, and a second one. A heat receiver including a header pipe, wherein at least a first header pipe of the first and second header pipes is formed in a rectangular tube shape, and an upper insertion groove extends over the entire length of the upper side of the first header pipe. And a lower insertion groove along the inner side surface is provided on the lower side, and the heat receiving part has a first flow path through which refrigerant flows from the first header pipe to the second header pipe. A second heat receiving portion having a second flow path for circulating the refrigerant from the second header pipe to the first header pipe, a partition wall partitioning the first heat receiving portion and the second heat receiving portion, Provided at an end of the wall along the flow direction of the refrigerant, having a cutout portion orthogonal to the flow direction of the refrigerant and having a straight bottom, and the first header pipe includes the first heat receiving pipe. An inlet for allowing the refrigerant to flow into the part, an outlet for discharging the refrigerant that has flowed in from the second heat receiving part, an interior of the first header pipe, and the first header pipe A partition plate having a rectangular portion for allowing the introduced refrigerant to flow into the first heat receiving portion and a first fitting groove into which one end portion of the heat receiving portion can be fitted are provided . A rectangular portion that is inserted into the inner side surface and the lower insertion groove of the header pipe via the upper insertion groove of the header pipe, and a bulging head that extends to the upper end of the rectangular portion and is inserted into the upper insertion groove; It is formed in a substantially T-shape comprising a said second Heddapa And a second fitting groove into which the other end of the heat receiving portion can be fitted, and fitting the end of the heat receiving portion into the first fitting groove and the second fitting groove, The rectangular part of the partition plate is fitted so that the bottom part of the notch part comes into contact, and the first and second header pipes and the heat receiving part are brazed and joined (claim 1). .

  By comprising in this way, it has the 1st header pipe which has an inflow port, an outflow port, and a partition plate, the 2nd header pipe which opposes this 1st header pipe, and the flow path of the refrigerant | coolant divided by the division wall. The first and second header pipes and the heat receiving part are joined with the flat heat receiving part having the first and second heat receiving parts and the notch provided at the end of the partition wall fitted to the partition plate. can do.

Moreover, in this invention, while having multiple said 1st heat receiving part and said 2nd heat receiving part, it has multiple said partition walls which divide said 1st heat receiving part and said 2nd heat receiving part, In said 1st header pipe Is provided with a plurality of the partition plates, and the second header pipe defines the inside of the second header pipe and allows the refrigerant flowing into the second header pipe to flow into the second heat receiving portion. A partition plate may be provided (Claim 2 ).

  By configuring in this way, the refrigerant flowing in from the inflow port circulates around the first heat receiving portion and the second heat receiving portion a plurality of times, so that the flow rate of the refrigerant can be made uniform.

Further, in the present invention, above the first heat receiving unit and the second heat receiving unit, it is preferable that the first flow path and second flow path is provided with a plurality (claim 3).

  With this configuration, the flow of the refrigerant can be rectified, so that the cooling efficiency can be improved and the flow rate of the refrigerant can be made uniform.

  Further, according to the first aspect of the present invention, the header pipe and the heat receiving portion can be integrally brazed, and the joining can be easily performed and the accuracy of the joining portion can be improved. In addition, by using an aluminum member, it is possible to recycle and effectively use resources.

  According to this invention, the state which fitted into the partition plate the notch part provided in the edge part of the partition wall which divides the 1st heat receiving part and the 2nd heat receiving part which each have a refrigerant flow path of a flat heat receiving part Thus, since the header pipe and the heat receiving portion are joined together, it is possible to facilitate joining between the header pipe and the heat receiving portion, and to improve the accuracy of the joining portion.

It is a block diagram which shows a part of internal structure of the notebook personal computer using the heat receiver of 1st Embodiment concerning this invention. It is a perspective view which shows the heat receiver of 1st Embodiment. The top view which shows the principal part of the heat receiver of 1st Embodiment in a cross section (a), the principal part expanded sectional view which follows the AA line of (a), The essential part which follows the BB line of (a) It is a partial expanded sectional view (c). It is an expanded sectional view (a) which shows the joined state of the heat receiving part at the time of making the header pipe in this invention into a square cylinder shape, and the expanded sectional view (b) which shows the joined state of a partition plate vicinity. It is a disassembled cross-sectional perspective view which shows the partition plate vicinity of the heat receiver of 1st Embodiment. It is a disassembled cross-sectional perspective view which shows a square cylinder header pipe, a heat receiving part, and a partition plate. It is a disassembled cross-sectional perspective view which shows the edge part vicinity of the 2nd header pipe of the heat receiver of 1st Embodiment. It is a top view which shows the principal part of the heat receiver of 2nd Embodiment which concerns on this invention in a cross section. It is a perspective view which shows the conventional heat receiver. It is a partial cross section top view which shows the conventional heat receiver.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, a case will be described in which the heat receiver according to the present invention is applied to cooling an electronic device (for example, an LSI chip) of a notebook personal computer.

  As shown in FIG. 1, the casing 1 of the notebook computer includes a DVD booting device 2, a hard disk booting device 3, an electronic component 4 that is a cooled object, and a cooling unit 10 for cooling the electronic component 4. Prepare.

  The cooling unit 10 includes a heat exchanger 11, a fan unit 12, a tank 13 for storing a refrigerant, a pump 14 for generating a refrigerant flow, and a heat receiver 20 according to the present invention provided on the electronic component 4. The heat exchanger 11, the fan unit 12, the tank 13, the pump 14, and the heat receiver 20 are connected by a refrigerant flow pipe 15. A refrigerant flows through the cooling unit 10, and heat generated by the electronic component 4 is absorbed by the heat receiver 20. The heat absorbed by the heat receiver 20 is taken away by the heat exchanger 11, and this heat is released to the outside of the housing 10 by the air flow generated by the fan unit 12. Further, the refrigerant from which heat has been removed flows into the heat receiver 20 via the tank 13 and the pump 14.

<First Embodiment>
Next, based on FIGS. 2-5, the heat receiver 20 of 1st Embodiment is demonstrated.

  As shown in FIG. 2, the heat receiver 20 of the first embodiment includes a flat heat receiving portion 21 that absorbs heat of the electronic component 4, and a first header pipe 22 and a second header that communicate with both ends of the heat receiving portion 21. A pipe 23 is provided. Here, the heat receiving portion 21, the first header pipe 22, and the second header pipe 23 are formed of an aluminum member, for example, an aluminum extruded profile.

  In addition, although the shape of the 1st header pipe 22 and the 2nd header pipe 23 is formed in the cylindrical shape, a rectangular tube shape may be sufficient.

  The heat receiving part 21 circulates the refrigerant from the first header pipe 22 to the first header pipe 22 and the first heat receiving part 24 having a first flow path 24 a that circulates the refrigerant from the first header pipe 22 to the second header pipe 23. A second heat receiving portion 25 having a second flow path 25a, a partition wall 26 that partitions the first heat receiving portion 24 and the second heat receiving portion 25, and a cut provided on an end portion 26a of the partition wall 26 along the refrigerant flow direction. A notch 27 is provided. In this case, the first flow path 24a and the second flow path 25a are formed with a plurality of parallel lines (six lines are shown in the drawing) 24a and 25a which are partitioned by the partition wall 21a. Thus, the flow of the refrigerant can be rectified by forming a plurality of rows of flow paths 24a and 25a parallel to each other. Note that the number of rows of the first flow path 24a and the second flow path 25a may be different.

  An inlet 28 for allowing the refrigerant to flow into the first heat receiving part 24 is provided at one end of the first header pipe 22, and the refrigerant flowing from the second heat receiving part 25 at the other end of the first header pipe 22. The outflow port 29 for letting out the gas is provided. The first header pipe 22 partitions the inside of the first header pipe 22 and causes the refrigerant that has flowed into the first header pipe 22 from the inlet 28 to flow into the first heat receiving part 24, so that the second heat receiving part 24 A partition plate 30 is provided for allowing the refrigerant flowing from 25 to the first header pipe 22 to flow out to the outlet 29. Thus, with the partition plate 30 as a boundary, the inside of the first header pipe 22 is connected to the upstream first pipe channel 22 a communicating with the inlet 28 and the downstream first pipe channel 22 b communicating with the outlet 29. It is divided into and.

  Aluminum end caps 32 and 33 are brazed to both ends of the first header pipe 22, and similar end caps 34 and 35 are brazed to both ends of the second header pipe 23.

  Next, the joining of the first and second header pipes 22 and 23 and the heat receiving part 21 will be described. A first fitting groove 31 that allows one end of the heat receiving portion 21 to be fitted is provided in the longitudinal direction on one side of the first header pipe 22, and the heat receiving portion 21 is provided on one side of the second header pipe 23. A second fitting groove 36 is provided in the longitudinal direction so that the other end can be fitted. A partition plate insertion groove 37 into which the partition plate 30 can be inserted is provided on the side surface of the first header pipe 22 that faces the heat receiving portion 21.

  In order to braze and join the first and second header pipes 22 and 23 and the heat receiving part 21, is brazing material applied to at least one of the joining parts of the first and second header pipes 22 and 23 and the heat receiving part 21? It is necessary to interpose a brazing material at the joint. Here, a case where a brazing material is applied will be described.

  First, the partition plate 30 is inserted into the partition plate insertion groove 37 of the first header pipe 22. In this case, as shown in FIGS. 3C and 4, the partition plate 30 extends to the semicircular arc portion 30 a that contacts the inner peripheral surface of the first header pipe 22 and the proximal end side of the semicircular arc portion 30 a. It is formed in a shape composed of an existing rectangular portion 30b. Next, one end portion of the heat receiving portion 21 is fitted in the first fitting groove 31 provided in the first header pipe 22, and the notch portion 27 provided in the end portion of the partition wall 26 is fitted in the partition plate 30. Combine. Further, the other end of the heat receiving portion 21 is fitted into a second fitting groove 36 provided in the second header pipe 23. Then, with the end caps 32 to 35 being attached to the end portions of the first and second header pipes 22 and 23, the first and second header pipes 22 and 23 and the heat receiving portion 21 are fixed by a fixture (not shown). In the temporarily fixed state, it is brazed together by heating in a furnace. After joining in this way, an inlet 28 and an outlet 29 are provided in the first header pipe 22.

  In the heat receiver 20 configured as described above, as shown in FIGS. 1 to 3, the refrigerant that has flowed into the inlet 28 by the pump 14 flows from the first pipe channel 22 a on the upstream side to the first channel 24 a. To the flow path 23a in the second header pipe 23, and flows from the flow path 23a to the first pipe flow path 22b on the downstream side through the second flow path 25a and flows out from the outlet 29. At this time, the heat of the electronic component 4 is absorbed and cooled by the refrigerant flowing through the first flow path 24a and the second flow path 25a. The refrigerant that has flowed out of the outlet 29 is deprived of heat in the heat exchanger 11 and flows into the inlet 28 again via the tank 13 and the pump 14.

  According to the heat receiver 20 of the first embodiment, the refrigerant inlet 28 and the outlet 29 are provided in the first header pipe 22, and the first heat receiver 24 and the second heat receiver 25 are connected via the partition wall 26. Since it forms, the heat receiving part 21 can be reduced in size, and the freedom degree of arrangement | positioning of the heat receiver 20 in the limited space can be given.

  Moreover, according to the heat receiver 20 of 1st Embodiment, the 1st header pipe 22 and the heat receiving part 21 are made into the state which fitted the notch part 27 provided in the edge part of the partition wall 26 to the partition plate 30. FIG. Since it joins, while joining between the 1st header pipe 22 and the heat receiving part 21 can be performed easily, the precision of joining can be improved.

  In the above-described embodiment, the case where the first and second header pipes 22 and 23 are formed in a cylindrical shape has been described. However, the case where the first and second header pipes 22 and 23 are formed in a cylindrical shape is described with reference to FIGS. 3A and 4A. One header pipe 22A will be described as a representative.

  When the square header-shaped first header pipe 22A is used, an upper insertion groove 37A is provided over the entire length of the upper side of the first header pipe 22A, and a lower insertion groove 37B along the inner surface is provided on the lower side. The partition plate 30A is inserted into the upper insertion groove 37A and the lower insertion groove 37B. In this case, as shown in FIGS. 3A (b) and 4A, the partition plate 30A includes a rectangular portion 30c inserted into the inner side surface of the first header pipe 22A and the lower insertion groove 37B via the upper insertion groove 37A. In addition, it is formed in a substantially T-shape including a bulging head 30d that extends to the upper end of the rectangular portion 30c and is inserted into the upper insertion groove 37A.

Second Embodiment
Next, a second embodiment of the heat receiver according to the present invention will be described. As shown in FIG. 6, the heat receiver 40 of the second embodiment has first heat receiving portions 44 and 54 and second heat receiving portions 45 and 55 alternately, and the first heat receiving portions 44 and 54 and the second heat receiving portion. Partition walls 46 a to 46 c partitioning 45 and 55. The first header pipe 42 partitions the inside of the first header pipe 42 and partitions 50a and 50b for allowing the refrigerant flowing into the first header pipe 42 to flow into the first heat receiving portions 44 and 54. Is provided. As a result, the inside of the first header pipe 42 is separated from the partition plate 50a fitted into the notch 37a of the partition wall 46a and the partition plate 50b fitted into the notch 37b of the partition wall 46c. The upstream first pipe channel 42 a communicating with the inlet 28, the downstream first pipe channel 42 c communicating with the outlet 29, the upstream first pipe channel 42 a and the downstream first It is divided into a first pipe flow path 42b on the middle stream side provided between the pipe flow path 42c.

  Further, the second header pipe 43 is provided with a partition plate 50c for partitioning the inside of the second header pipe 43 and for allowing the refrigerant flowing into the second header pipe 43 to flow into the second heat receiving portion 45. Yes. As a result, with the partition plate 50c fitted into the notch 37c of the partition wall 46b as a boundary, the inside of the second header pipe 43 is the upstream second pipe flow path 43a and the downstream second pipe flow path. 43b. Moreover, since the heat receiver of 2nd Embodiment is comprised similarly to the heat receiver 20 of 1st Embodiment except said structure, the same code | symbol is attached | subjected to the same part and description is abbreviate | omitted.

  In the second embodiment, the first flow paths 44a and 54a of the first heat receiving sections 44 and 54 and the second flow paths 45a and 55a of the second heat receiving sections 45 and 55 are formed in three rows, respectively. Although the flow paths 24a and 25a are formed in parallel, the number of rows of the first flow paths 44a and 54a and the second flow paths 45a and 55a may be different.

  In the second embodiment, two first heat receiving portions 44 and 54 and two second heat receiving portions 45 and 55 are provided, but three or more first heat receiving portions and second heat receiving portions are provided. Also good.

The joining of the first and second header pipes 42 and 43 and the heat receiving portion 41 in the second embodiment can be performed in the same manner as in the first embodiment except for the following two points. That is, (1) a partition plate insertion groove (not shown) for inserting the partition plates 50 a and 50 b into the first header pipe 42 and a partition plate insertion groove (not shown) into which the partition plate 50 c is inserted into the second header pipe 43. Point),
(2) The notch 37a provided in the partition wall 46a is fitted into the partition plate 50a, and the notch 37c provided in the partition wall 46b is fitted into the partition plate 50c to be provided in the partition wall 46c. The difference from the first embodiment is that the notch 37b is fitted and joined to the partition plate 50b.

  As shown in FIGS. 1 and 6, the heat receiver 40 of the second embodiment configured as described above is configured so that the refrigerant flowing into the inlet 28 by the pump 14 is the first upstream of the first header pipe 42. The first pipe flow path 42a flows through the first flow path 44a to the upstream second pipe flow path 43a in the second header pipe 43, and the second pipe flow path 43a passes through the second flow path 45a to the midstream side. To the first pipe flow path 42b, and from the first pipe flow path 42b on the middle stream side to the second pipe flow path 43b on the downstream side of the second header pipe 43 via the first flow path 54a. It flows out from the outflow port 29 through the 2nd flow path 55a from the path | route 43b. At this time, the heat of the electronic component 4 is absorbed and cooled by the refrigerant flowing through the first flow paths 44a and 54a and the second flow paths 45a and 55a. The refrigerant that has flowed out of the outlet 29 is deprived of heat in the heat exchanger 11 and flows into the inlet 28 again via the tank 13 and the pump 14.

  According to the heat receiver 40 of the second embodiment configured as described above, the refrigerant inlet 28 and the outlet 29 are provided in the first header pipe 42, and the first heat receiver is provided via the partition walls 46a to 46c. 44 and 54 and the second heat receiving portions 45 and 55 are formed, so that the refrigerant flowing in from the inflow port 28 flows through the first flow paths 44a and 54a of the first heat receiving portions 44 and 54 and the second heat receiving portions 45 and 55. Since the second flow paths 45a and 55a are distributed around the plurality of times, the flow rate of the refrigerant can be made uniform. Further, similarly to the first embodiment, the heat receiving part 41 can be reduced in size, and the degree of freedom of arrangement of the heat receiver 20 in a limited space can be provided.

  Moreover, the heat receiver 40 of 2nd Embodiment is the state which fitted the 1st header pipe 42 and the heat receiving part in the state which fitted the notch parts 37a-37c provided in the edge part of the partition wall 46 to the partition plates 50a-50c. Since 41 is joined, the joining between the first header pipe 42 and the heat receiving portion 41 can be easily performed, and the joining accuracy can be improved.

  In the second embodiment, the other parts are the same as in the first embodiment, and the first and second header pipes 42 and 43 are formed in a rectangular tube shape as in the first embodiment, and the upper insertion groove. 37A and the lower insertion groove 37B may be formed, and the partition plates 50a to 50c may be formed in a substantially T shape similarly to the partition plate 30A.

  In the above embodiment, the case where the heat receiver according to the present invention is applied to the cooler that cools the electronic components of the notebook computer has been described. However, the heat receiver according to the present invention cools the heat of the electronic components of the notebook computer. The present invention is not limited to this, and can also be applied to cooling other objects to be cooled that generate heat. For example, the semiconductor wafer can be applied to cooling a heated semiconductor wafer by placing the semiconductor wafer on the heat receiver. In this case, it is possible to cool the semiconductor wafer in a state where three support portions are provided on the upper portion of the heat receiver, and the semiconductor wafer is placed (supported) on these support portions. The heat receiver that cools the semiconductor wafer is also connected to a heat exchanger, a tank, and a pump as in the first and second embodiments, and the refrigerant is circulated.

4 Electronic parts (cooled object)
20, 40 Heat receiver 21 Heat receiver 22, 22A, 42 First header pipe 23, 43 Second header pipe 24, 44, 54 First heat receiver 24a, 44a, 54a First flow path 25, 45, 55 Second heat receiver Portions 25a, 45a, 55a Second flow path 26, 46a-46c Partition wall 27, 37a-37c Notch 28 Inlet 29 Outlet 30, 30A, 50a-50c Partition plate 31 First fitting groove 36 Second fitting Groove

Claims (3)

A heat receiving device comprising a flat aluminum heat receiving portion that absorbs heat of a body to be cooled, and an aluminum first header pipe and a second header pipe communicating with both ends of the heat receiving portion,
At least the first header pipe of the first and second header pipes is formed in a rectangular tube shape, and an upper insertion groove is provided over the entire length of the upper side of the first header pipe. A lower insertion groove is provided along
The heat receiving portion causes a first heat receiving portion having a first flow path for flowing a refrigerant from the first header pipe to the second header pipe, and causes the refrigerant to flow from the second header pipe to the first header pipe. A second heat receiving portion having a second flow path, a partition wall partitioning the first heat receiving portion and the second heat receiving portion, and an end portion of the partition wall along the flow direction of the refrigerant. It has a notch that is perpendicular to the direction and straight at the bottom,
The first header pipe includes an inlet for allowing the refrigerant to flow into the first heat receiving portion, an outlet for allowing the refrigerant flowing from the second heat receiving portion to flow out, and the first header pipe. A partition plate having a rectangular portion for partitioning the interior of the first header pipe and allowing the refrigerant flowing into the first header pipe to flow into the first heat receiving portion, and a first fitting in which one end portion of the heat receiving portion can be fitted A groove is provided,
The partition plate includes a rectangular portion inserted into the inner side surface and the lower insertion groove of the header pipe through the upper insertion groove of the first header pipe, and extends to the upper end of the rectangular portion to enter the upper insertion groove. Formed in a substantially T-shape consisting of a bulging head to be inserted,
The second header pipe is provided with a second fitting groove into which the other end of the heat receiving portion can be fitted,
In the first groove and second groove with fitting the ends of the heat-receiving portion, the rectangular portion of the partition plate fitted to abut the bottom of the cutout portion, the first and A heat receiver, wherein the second header pipe and the heat receiving portion are brazed and joined. The heat receiver according to claim 1 ,
While having a plurality of the first heat receiving part and the second heat receiving part, having a plurality of the partition walls that partition the first heat receiving part and the second heat receiving part,
The first header pipe is provided with a plurality of the partition plates,
The second header pipe is provided with a partition plate for partitioning the inside of the second header pipe and allowing the refrigerant flowing into the second header pipe to flow into the second heat receiving portion. Heat receiver. The heat receiver according to claim 1 or 2 ,
A heat receiver, wherein a plurality of the first flow paths and the second flow paths are provided.

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