JP2005203466A - Heatsink - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a forced heat dissipation type heatsink which uses such a gaseous refrigerant that can solve a conventional technical problem. <P>SOLUTION: The heatsink 1 made of aluminum is provided with a heat reception part 51 having a heat generating body 9, a main fin 52 and partitioning fins 2 and 4, and a duct 6 is formed like a matrix of four layers and four lines so as to have a square section for distributing an air 8 for removal of a heat generating from a heat generating body 9. Duct group layers 6A-6D of four layers are arranged side by side in the orthogonally crossing direction of the heat reception part 51. The partitioning fin 2 or the like shared by the adjacent duct group layer 6A and 6B is provided with a through hole 31 and a guide body 38 for each of the ducts 6 in the corresponding region adjacent to flow-out end 9b of the air 8 of the heat generating body 9, and a through hole 32 and a guide body 39 in the corresponding region adjacent to a flow-in end 9a. The guide bodies 38 and 39 are integrally formed like a tongue by creating from the material of the partitioning fin 2 from the end near to the generating body 9 of the through holes during formation of the through holes. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a radiator for forcibly radiating heat generated by a heating element such as a semiconductor element using a gaseous refrigerant.

As a heat radiator for forcibly radiating heat using a gaseous refrigerant such as conventional air, a plurality of ducts having a quadrangular cross-sectional shape for allowing the refrigerant to flow, a heat receiving portion, basic fins, and a partition It is known that it is formed in a matrix with fins, and this duct has the same duct cross-sectional area, or a duct that has a wider duct cross-section as the duct is located closer to the heating element. (For example, refer to Patent Document 1).
JP 2002-314277 A (page 4-6, FIG. 4, FIG. 6, FIG. 8)

In the conventional radiator for forcibly radiating heat using the gaseous refrigerant described above, each duct is surrounded by the main fin and the heat receiving part or the partition fin, so that it flows into each duct. Thus, the refrigerant is discharged from each duct while maintaining the mass flow rate as it is. In addition, the radiator has a temperature distribution in which the portion closer to the heating element becomes higher due to the presence of conductive thermal resistance. Thus, since a gas such as air is used as the refrigerant, taking the case where air is adopted as the gaseous refrigerant as an example, and assuming that air is an ideal gas, the volume of the gaseous refrigerant is According to Charles' law, every time the temperature rises by 1 ° C. under a constant pressure, it increases by about 273 times the volume at 0 ° C.
That is, the temperature rise of the gaseous refrigerant causes a large thermal expansion in the refrigerant, and the mass flow rate in the duct is constant with respect to the flow direction of the refrigerant. Since the pressure loss generated in the refrigerant is increased, the mass flow rate of the refrigerant flowing through the duct is reduced as a result. Thus, since the degree of reduction of the mass flow rate becomes larger as the refrigerant flows through the duct of the high-temperature portion having a relatively high heat dissipation capability, it is difficult to sufficiently exhibit the heat dissipation performance with the conventional heat radiator. There is a problem with.

  The above-described conventional radiator disclosed in Japanese Patent Laid-Open No. 2002-314277 is an attempt to solve this problem, but each duct is surrounded by four sides and the refrigerant flowing into the duct remains as it is. The above-mentioned problem has not been solved since it is the same as the previous one in maintaining the mass flow rate and flowing out of the duct. Accordingly, an object of the present invention is to provide a forced heat dissipation type heat dissipating body using a gaseous refrigerant that solves the above-described problems of the prior art.

In the present invention, the aforementioned object is
1) A heat receiving portion having a quadrangular surface shape and having one side surface as a heat receiving surface for mounting a heating element, and a side surface of the heat receiving portion on the side opposite to the heat receiving surface is substantially orthogonal to and parallel to each other. A plurality of basic fins having a quadrangular surface shape, and a plurality of partition fins having a quadrangular surface shape that is substantially orthogonal to the side surface of the basic fin and substantially parallel to the heat receiving portion, One side wall in which a duct for passing a gaseous refrigerant for removing heat generated in the heating element by these heat receiving portions, basic fins, and partition fins faces adjacent basic fins to each other Refrigerant flow method as a pair of partition fins adjacent to each other or as a duct having a quadrangular cross-sectional shape as the other side wall pair facing each other between the heat receiving portion and the partition fin adjacent to the heat receiving portion Are formed adjacent to each other so as to be parallel to each other and arranged in a matrix, and a duct group layer is formed by the plurality of ducts arranged in parallel to each other with respect to the heat receiving portion of the plurality of ducts. In addition, each of the plurality of duct group layers is arranged adjacent to each other in a direction orthogonal to the heat receiving portion, and the partition fins shared by the duct group layers adjacent to each other serve as an outflow of the refrigerant of the heating element. Providing a through hole in a portion corresponding to the vicinity of the side end, or
2) In the means described in the item 1, the partition fin provided with the through hole has a part of the refrigerant flowing in the duct in the vicinity of an end of the through hole closer to the heating element. Including a guide body that leads to a duct of a duct group layer far from the heat receiving section, or
3) In the means described in the item 1 or 2, the partition fin shared by the duct group layers adjacent to each other corresponds to the vicinity of the refrigerant inflow side end of the heating element for each duct. A guide that guides a part of the refrigerant flowing in the duct to a duct of a duct group layer closer to the heat receiving part in the vicinity of the through hole in the part and the end of the through hole closer to the heating element Providing the body, or
4) In the means described in the item 2 or 3, the guide body is achieved by being integrally formed from a material of the partition fin.

In the heat dissipating body according to the present invention, the following effects can be obtained by adopting the configuration described in the section of means for solving the above-mentioned problems.
1) By adopting the configuration according to item (1) of the means for solving the above-mentioned problems, heat removal in the diverted flow of the gaseous refrigerant flowing through each duct of each duct group layer In the branch flow having a relatively large amount, when this branch flow reaches the through-hole, there is a bypass flow that passes through the through-hole and flows into the duct of the adjacent duct group layer and flows into a relatively low-pressure branch flow. The generated pressure loss is reduced by reducing the flow rate of the gaseous refrigerant flowing between the through-hole and the refrigerant outflow end of the duct. As a result, in the radiator according to the present invention, a part having a relatively high heat dissipation capability due to a relatively high temperature in each of the ducts of the radiator (see FIGS. 3 and FIG. 4, which is indicated by a range dimension S, and a portion having a dimension approximately equal to or slightly longer than the length-direction dimension L of the heating element 9). Is possible. Also,
2) By adopting the configuration according to the items (2) and (4) of the means for solving the problem, the cause of the bypass flow described in the item 1) is the factor in the item 1). In addition to the factors described above, the factors caused by the increase in the amount of inflow into the through-holes by forcibly changing the flow direction of the split flow by colliding with the guide body provided in the partition fin, and The cross-sectional area of the flow path is narrowed by the guide body provided in the partition fin, and a factor due to the generation of a low-pressure portion in the vicinity of the front end portion of the guide body is added due to local high speed. As a result, the flow rate of the bypass flow flowing through the through-hole is increased as compared with the case of the above item 1), and the heat dissipation performance of the radiator according to the present invention can be further improved. Furthermore,
3) By adopting the configuration according to the items (3) and (4) of the means for solving the above problems, the duct group layer formed by the ducts using the heat receiving portion as a part of the constituent elements is provided. When the diverted flow of the gaseous refrigerant flowing through the respective ducts of the respective duct group layers excluding each of the duct group layers reaches a through hole provided in a portion corresponding to the vicinity of the refrigerant inflow side end of the heating element, It collides with the guide body provided in the partition fin in relation to the through hole, and its flow direction is forcibly changed. As a result, a bypass flow is generated that passes through the through hole and flows into the duct of the duct group layer adjacent to the heating element. Due to the occurrence of this bypass flow, the temperature of each duct of the heat radiating body is relatively high so that the heat radiating capacity is relatively high (shown by the range dimension S in FIGS. 1, 3 and 4 to be described later, The mass flow rate of each diverted flow at a portion having a dimension substantially equal to or slightly longer than the lengthwise dimension L of each of the ducts in the duct group layer formed by the duct using the heat receiving portion as a part of the component. The shunt flowing through the inside is the largest. This diversion is the diversion that flows through the duct of the duct group layer that is located at the closest location to the heating element and that has the highest temperature, and the diversion with the largest heat removal amount per unit mass flow rate at the same flow rate condition. It is. As a result, the heat dissipating body according to the present invention can increase its heat dissipating performance as compared with the case of item 2).

The best mode for carrying out the present invention will be described below in detail with reference to the drawings.
Embodiment 1 FIG. 2 is an explanatory view showing a radiator according to an example of an embodiment of the present invention as a perspective view together with related devices, and FIG. 3 is a sectional view taken along the line PP in FIG. In FIG. 2 and FIG. 3, reference numeral 1 </ b> A is a heat radiating body made of a metal material having a heat receiving portion 51, a plurality of basic fins 52, a plurality of partition fins 2 </ b> A, and partition fins 4. The heat receiving portion 51 is a flat plate having a rectangular surface shape, and one side surface 511 is a heat receiving surface for mounting the heating element 9 such as a semiconductor element. Each basic fin 52 is a flat plate having a rectangular surface shape, and is arranged on a side surface 512 of the heat receiving portion 51 opposite to the heat receiving surface 511 so as to be orthogonal to the heat receiving portion 51 and parallel to each other. Each of the partition fins 2 </ b> A and the partition fins 4 is a flat plate having a rectangular surface shape. The partition fins 2 </ b> A and the partition fins 4 are orthogonal to the main fins 52 and parallel to the heat receiving portions 51 on the side surfaces of the main fins 52. It arrange | positions so that the matching basic | foundation fin 52 may be connected. In addition, the partition fin 4 is a partition fin arrange | positioned in the outer surface part of 1 A of heat radiators in this case.

In the heat radiating body 1A, the duct 6 for allowing the air 8 which is a gaseous refrigerant to remove heat generated by the heat generating body 9 to flow through the heat receiving portion 51, the core fins 52, the partition fins 2A and the partition fins 4. A group of is formed. As shown in FIGS. 2 and 3, these ducts 6 have adjacent side wall fins 52 facing each other as one pair of side walls, and adjacent partition fins 2 </ b> A, 4 or heat receiving portion 51. The other side wall pair that opposes the partition fin 2A adjacent to the heat receiving portion 51 is formed as a duct having a rectangular cross-sectional shape and adjacent to each other so that the flow direction of the air 8 is parallel. It is arranged in a matrix.
In this case, these ducts 6 form four duct group layers of duct group layers 6A, 6B, 6C and 6D by four ducts 6 arranged in parallel with each other with respect to the heat receiving portion 51. doing. The respective duct group layers 6 </ b> A to 6 </ b> D are arranged adjacent to each other in a direction orthogonal to the heat receiving portion 51. The air 8 flows into the ducts 6 from the inflow ends 6a and flows out of the outflow ends 6b, but flows through the ducts 6 of the respective duct group layers 6A to 6D as the divided flow 81 to the divided flow 84. Thus, a part of the heat generated in the heating element 9 is transmitted to the air 8 through the path of the heat receiving portion 51 → air 8, but most of the heat receiving portion 51 → the basic fin 52 → air 8 or the heat receiving portion. 51 → main fin 52 → partition fin 2A, 4 → air 8 is transmitted to the air 8 through the route.

  The configuration content of the heat dissipating body 1A described so far with reference to FIGS. 2 and 3 is the same as that of the conventional example according to the above-mentioned “Patent Document 1”. By the way, the air 8 flowing through the ducts 6 of the respective duct group layers 6A to 6D as the diverted flow 81 to the diverted flow 84 is increased in temperature by removing heat generated in the heating element 9 → expanded in volume → flow velocity. → Increase in pressure, but by flowing through the duct 6 at a relatively high temperature portion of the heat radiating body 1A, the pressure value becomes relatively higher as the amount of heat removal becomes larger. In other words, the mutual relationship between the pressure values of the diverted flow 81 to the diverted flow 84 that has risen in temperature by removing the heat generated in the heating element 9 is as follows: diverted flow 81> divided flow 82> divided flow 83> divided flow 84 The present invention has been made paying attention to this point, and the characteristic features of the radiator 1A according to the present invention are shared by the duct group layers 6A and 6B, 6B and 6C, or 6C and 6D, which are adjacent to each other. The partition fin 2 </ b> A (which is also a partition fin excluding the partition fin 4) is provided with a through hole 31 in a portion corresponding to the vicinity of the outflow side end portion 9 b of the air 8 of the heating element 9 for each duct 6.

The heat radiator 1A having the above-described configuration is made of a metal material such as an aluminum material, for example, and has a width dimension corresponding to the disposition interval of a portion of the main fin 52 and the adjacent main fin 52. The extruded member (A) formed integrally with the portion 51 in an L shape, and the heat receiving portion 51 having a width dimension corresponding to the thickness direction dimension of the one main fin 52 and the main fin 52. The extruding member (B) formed in a plate shape integrally with the part, a punching member (A) in which the plate material is formed with the through hole 31 in a shape and size corresponding to the partition fin 2A, and the plate material as the partition fin 4 is manufactured by combining the required number of punched members (B) formed in the shape and dimensions corresponding to 4 and brazing them together.
Here, the extruded member (B) is a member corresponding to the core fins 52 and the like disposed at the end. In the extruded member (A) and the extruded member (B), it is preferable that a concave groove is formed at a portion where the punched member (A) and the stamped member (B) are joined. In addition, the extruded member (A), the extruded member (B), the punched member (A), and the punched member (B), each of which is manufactured as a long material, are brazed together to form a long member. It is also possible to obtain the heat radiator 1A by manufacturing and cutting the long member into an appropriate length.

2A and 3B, the heat radiating body 1A according to the embodiment of the present invention has the above-described configuration. Therefore, the air flowing through the ducts 6 of the respective duct group layers 6A to 6D as the diverted flow 81 to the diverted flow 84 is provided. 8, the diverted flow 81 to the diverted flow 83 reaching the through-hole 31 are divided into a relatively low pressure diverted flow through the through-hole 31 from the diverted flow 81 to the divided flow 82, the divided flow 82 → the divided flow 83 and the divided flow 83 → the divided flow 84. A bypass flow 88 that flows into the 82-divided flow 84 is generated. Accordingly, in the branch flow (such as the branch flow 81 in this case) where the heat removal amount is relatively large by flowing through the duct 6 at a relatively high temperature portion of the radiator 1A, the portion where the through hole 31 is formed. To the outflow end 6 b of the air 8 of the duct 6, the pressure loss caused by the flow rate of the flowing air 8 is reduced.
That is, in the heat dissipating body 1A, the air 8 that has been thermally expanded by the diversion with a relatively large amount of heat removal is bypassed to another duct 6 through which the diversion with a relatively small amount of heat removal flows. In particular, it is possible to reduce the amount of increase in pressure loss that occurs in the diversion with a large amount of heat removal. As a result, in the heat radiating body 1A, with respect to the diversion with a relatively large amount of heat removal, a portion having a relatively high heat radiating capacity due to a relatively high temperature in each duct 6 of the heat radiating body 1A (range dimension S in FIG. 3). And a portion having a dimension approximately equal to or slightly longer than the longitudinal dimension L of the heating element 9), the reduction of the mass flow rate is suppressed, and as a result, the heat dissipation performance of the radiator 1A is improved.
[Embodiment 2] FIG. 4 is a sectional view showing a radiator according to a different example of the embodiment of the present invention together with related devices, and the sectional position thereof is the same as that in FIG. In the following description, the same parts as those of the heat radiator 1A according to the present invention shown in FIGS. In FIG. 4, 1B is provided with a guide body 38 in the arrangement portion of the through hole 31 in place of the partition fin 2A with respect to the radiator 1A according to the embodiment of the present invention shown in FIGS. It is the heat radiator which used the partition fin 2B. In this case, the guide body 38 is integrated as a tongue-like body by cutting and raising from the material of the partition fin 2B from the end of the through hole 31 closer to the heating element 9 when the through hole 31 is formed. Formed. The radiator 1B having the above-described configuration is made of, for example, a metal material such as an aluminum material, and the punching member (A) has a through-hole 31 and a guide body 38 in a shape and size corresponding to the partition fin 2B. Except for being formed together, it is manufactured in the same manner as in the case of the radiator 1A.

Since the heat dissipating body 1B according to a different example of the embodiment of the present invention shown in FIG. 4 has the above-described configuration, the air 8 is divided into the diverted flow 81 to the diverted flow 83 flowing through the ducts 6 of the respective duct group layers 6A to 6D. Then, a bypass flow 88 is generated that passes through the through-hole 31 and flows into the relatively low pressure diversion 82 to diversion 84. The bypass flow 88 generated in the heat radiating body 1B will be described in the case of the partition fin 2B shared by the duct group layers 6A and 6B. With regard to the factors that cause the bypass flow 88 toward the diversion 83 in the diversion 82, the heat radiating body 1A is described. In addition to the factor due to the pressure difference between the diverted flow 82 and the diverted flow 83 in the case of the above, a factor due to the forced change of the flow direction of the diverted flow 82 by colliding with the guide body 38 provided in the partition fin 2B is added. The flow rate of the bypass flow 88 from the branch flow 82 to the branch flow 83 is increased as compared with the case of the radiator 1A.
Further, regarding the factor causing the bypass flow 88 in the branch flow 81 in the case of the partition fin 2B shared by the duct group layers 6A and 6B, the factor due to the pressure difference between the branch flow 81 and the branch flow 82 in the case of the radiator 1A. In addition, the cross-sectional area of the flow path of the diverted flow 82 toward the outflow end 6b of the duct 6 of the duct group layer 6B is narrowed by the guide body 38 provided in the partition fin 2B, and the guide body 38 is locally increased in speed. By adding a factor due to the generation of the low pressure portion in the vicinity of the tip portion 38a, the flow rate of the bypass flow 88 from the divided flow 81 to the divided flow 82 is increased as compared with the case of the radiator 1A.

In the case of the partition fins 2B shared by the duct group layers 6B and 6C or the duct group layers 6C and 6D, respectively, as in the case of the partition fins 2B shared by the duct group layers 6A and 6B, the bypass flow 88 is used. The effect | action and effect which are increased rather than the case of the heat radiator 1A are obtained. As described above, in the heat radiating body 1B, the portions of the heat dissipating body 1B having a relatively high heat dissipating capacity due to the relatively high temperatures (shown by the range dimension S in FIG. The degree of reduction of the mass flow rate at the part having a dimension substantially equal to or slightly longer than the lengthwise dimension L) is reduced as compared with the case of the radiator 1A. Moreover, since the guide body 38 is integrally formed with the partition fin 2B by cutting and raising processing or the like, the reduction of the heat radiation area of the partition fin 2B due to the formation of the through hole 31 can be compensated. As a result of these, the heat dissipation performance of the radiator 1B is improved as compared with the case of the radiator 1A.
[Embodiment 3] FIG. 1 is a sectional view showing a heat dissipating body according to still another example of the embodiment of the present invention together with related devices, and the position of the section is the same as in FIGS. In the following description, the same parts as those of the radiator 1B according to the present invention shown in FIG. In FIG. 1, reference numeral 1 denotes a partition fin provided with a through hole 32 and a guide body 39 in place of the partition fin 2 </ b> B, in addition to the radiator 1 </ b> B according to the example of the embodiment of the present invention shown in FIG. 4. 2 is a heat radiator. The through-hole 32 is in the vicinity of the inflow side end portion 9a of the air 8 of the heating element 9 for each duct 6 of the partition fin 2 shared by the duct group layers 6A and 6B, 6B and 6C, or 6C and 6D, which are adjacent to each other. It arrange | positions in the site | part corresponding to.

In this case, the guide body 39 is formed as a tongue-like body by cutting and raising the material of the partition fin 2 from the end of the through hole 32 closer to the heating element 9 when the through hole 32 is formed. It is integrally formed. The heat radiator 1 having the above-described configuration is made of, for example, a metal material such as an aluminum material, and the punching member (A) forms the plate material into the shape and size corresponding to the partition fins 2 and the through holes 31 and 32 and the guide. Except for being formed together with the bodies 38 and 39, the heat radiators 1A and 1B are manufactured in the same manner.
Since the heat dissipating body 1 according to a further different example of the embodiment of the present invention shown in FIG. 1 has the above-described configuration, the air 8 flowing through the ducts 6 of the respective duct group layers 6A to 6D as the divided flow 81 to the divided flow 84 is provided. Then, in addition to the bypass flow 88 in the radiators 1 </ b> A and 1 </ b> B, a bypass flow 89 that flows through the through holes 32 and flows into the split flow 81 to the split flow 83 is generated in the split flow 82 to the split flow 84 of the air 8. First, the bypass flow 89 generated in the radiator 1 will be described in the case of the partition fin 2 shared by the duct group layers 6A and 6B. The branch flow 82 approaching the arrangement portion of the through hole 32 and the guide body 39 is divided into the partition fins. 2, the flow direction is forcibly changed by colliding with the guide body 39 provided in 2, whereby a part of the divided flow 82 becomes a bypass flow 89 flowing into the divided flow 81 from the through hole 32.

In the case of the partition fin 2 shared by the duct group layers 6B and 6C or the duct group layers 6C and 6D, respectively, for the same reason as the partition fin 2 shared by the duct group layers 6A and 6B, A bypass flow 89 having a flow path of the divided flow 83 → the divided flow 82 and the divided flow 84 → the divided flow 83 is generated. In the radiator 1, the bypass flow 89 flows from each of the divided flow 82 to the divided flow 84 through the through-hole 32 and flows into the divided flow 81 to the divided flow 83 in this way, so that the temperature in each duct 6 of the radiator 1 is relative. The mass flow rate at a part having a relatively high heat radiation capability (a part having a range dimension S shown in FIG. 1 and having a dimension approximately equal to or slightly longer than the length L of the heating element 9) is The diversion 81 is the largest.
Therefore, the mass flow rate of the diverted flow 81 is increased as compared with the case of the radiators 1A and 1B, and the flow velocity thereof is also increased as compared with the case of the radiators 1A and 1B. This branch flow 81 is a branch flow that flows in the duct 6 of the duct group layer 6A that is located at the position closest to the heating element 9 of the radiator 1 and that has the highest temperature, and per unit mass flow rate under the condition of the same flow velocity. This is the diversion with the largest amount of heat removed. As a result, the heat dissipation performance of the radiator 1 is improved as compared with the case of the radiator 1B.

In addition, regarding the arrangement position of the through-hole 32, as this arrangement position approaches the heat generation center portion of the heating element 9, the portion indicated by the range dimension S in FIG. Of the bypass flow 89 flowing into a relatively high portion), the ratio of the flow through the entire portion indicated by the range dimension S is such that it starts to decrease or increases in the degree of decrease. On the other hand, as this arrangement position approaches the heat generation center portion of the heat generating element 9, for example, the degree of increase in pressure loss in the duct 6 through which the branch flow 81 after the formation site of the through hole 32 flows is reduced. It is in. For these reasons, there is an optimum position of the through hole 32 from the viewpoint of maximizing the heat dissipation performance of the radiator 1 to the air 8. Therefore, it is preferable that the arrangement position of the through hole 32 is set to an optimum position corresponding to the use condition of each heat radiator.
In the description of “Embodiment 1” to “Embodiment 3”, the through holes 31 provided in the heat dissipating bodies 1, 1 </ b> A and 1 </ b> B are in the vicinity of the outflow side end portion 9 b of the air 8 of the heating element 9 for each duct 6. It has been described that it is disposed at a portion corresponding to the above. As for the position where the through hole 31 is disposed, the degree of reduction in pressure loss between the through hole 31 formation portion and the outflow end 6b of the duct 6 is increased as the position is closer to the heat generation center of the heating element 9. There is a relationship. On the other hand, as this arrangement position approaches the heat generation center portion of the heating element 9, the portion indicated by the range dimension S in FIGS. 1, 3, and 4 (the heat dissipation performance is relatively high due to the relatively high temperature). Of the diverted flow 81 and the like flowing into the portion), the ratio of the flow through the entire portion indicated by the range dimension S is such that the reduction starts or increases. For these reasons, there is an optimum position of the through hole 31 from the viewpoint of maximizing the heat dissipation performance of the radiators 1, 1A and 1B to the air 8. Therefore, it is preferable that the arrangement position of the through-hole 31 is set to an optimum position corresponding to the use condition of each radiator.

  Further, in the above description of this section, it is assumed that the guide body 38 included in the radiators 1 and 1B and the guide body 39 included in the radiator 1 are integrally formed by cutting and raising from the material of the partition fins 2 and 2B. However, the present invention is not limited to this, and if necessary, the guide body may be made of a material separate from the material of the partition fins 2 and 2B and may be manufactured as a member separate from the partition fin. Further, in the above description of this section, it is assumed that each heat radiator 1, 1A, 1B has one heat receiving portion 51. However, the heat receiving portion 51 is not limited to this. Two heat sinks may be provided, and the heat receiving portions 51 may be arranged on the outer surface of the heat sink so as to face each other. In the above description of this section, air 8 has been used as the gaseous refrigerant. However, the present invention is not limited to this, and a gas other than air may be used as the gaseous refrigerant. Of course there is nothing.

It is sectional drawing which shows the heat radiator by the further different example of embodiment of this invention with a related apparatus. It is explanatory drawing which shows the heat radiator by an example of this Embodiment with a related apparatus as a perspective view. FIG. 3 is a cross-sectional view taken along the line PP in FIG. 2. It is sectional drawing which shows the heat radiator by the example from which this Embodiment differs from a related apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Radiator 2 Partition fin 31 Through-hole 32 Through-hole 38 Guide body 39 Guide body 4 Partition fin 51 Heat-receiving part 52 Core fin 6 Duct 6A Duct group layer 6B Duct group layer 6C Duct group layer 6D Duct group layer 8 Air 9 Heating element 9a Inlet side end 9b Outlet side end

Claims (4)

A heat receiving part having a quadrangular surface shape and having one side surface as a heat receiving surface for mounting the heating element, and a side surface of the heat receiving part on the side opposite to the heat receiving surface that is substantially orthogonal to and parallel to each other. A plurality of main fins having a surface shape, and a plurality of partition fins having a quadrangular surface shape that is substantially parallel to the side surface of the main fin and substantially parallel to the heat receiving portion. The duct for passing the gaseous refrigerant for removing the heat generated in the heating element by the heat receiving portion, the core fins and the partition fins is a pair of side walls which face each other adjacent core fins. , The partition fins adjacent to each other or as a duct having a quadrangular cross-sectional shape as the other side wall pair facing each other between the heat receiving portion and the partition fin adjacent to the heat receiving portion. A duct group layer is formed by a plurality of ducts that are formed adjacent to each other so as to be parallel to each other and arranged in a matrix, and that are arranged in parallel to each other with respect to the heat receiving portion of the plurality of ducts. Each of the plurality of duct group layers is arranged adjacent to each other in a direction orthogonal to the heat receiving portion, and the partition fins shared by the duct group layers adjacent to each other serve as the refrigerant of the heating element. A radiator having a through hole in a portion corresponding to the vicinity of the outflow side end. 2. The heat dissipating body according to claim 1, wherein the partition fin provided with the through-hole receives a part of the refrigerant flowing through the duct in the vicinity of an end of the through-hole closer to the heating element. A heat radiating body comprising a guide body that leads to a duct of a duct group layer far from the section. 3. The heat dissipating body according to claim 1, wherein the partition fin shared by the duct group layers adjacent to each other is located at a portion corresponding to the vicinity of the refrigerant inflow end of the heating element for each duct. In the vicinity of the through hole and the end of the through hole closer to the heating element, a guide body for guiding a part of the refrigerant flowing through the duct to the duct of the duct group layer closer to the heat receiving part A heat radiator characterized by comprising. The heat radiator according to claim 2 or 3, wherein the guide body is integrally formed from a material of the partition fin.

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