heat dissipating member

Abstract

The heat dissipating member has a plate-like base portion extending in a first direction along a direction in which a refrigerant flows and a second direction orthogonal to the first direction, and has a thickness in a third direction orthogonal to the first and second directions; and a plurality of fins protruding from the base portion toward the third direction side, extending in the first direction, and arranged in the second direction to guide the refrigerant along a plane intersecting the second direction. At least one of the fins has a first fin. At least one of the fins has at least one of a second fin and a third fin, the second fin being arranged on a downstream side of the first fin, i.e., on the first direction side, and having a third direction side end on the third direction side further than a third direction side end of a flow path formed between the first fin and a fin adjacent to the first fin in the second direction, and the third fin being arranged on a first direction opposite side of the first fin, and having a third direction side end on the third direction side further than the third direction side end of the flow path.

Description

Technical Field

[0001] The invention relates to a heat dissipation component. Background Art

[0002] Conventionally, heat sinks are used to cool heating elements. These heat sinks have a base and a plurality of fins. The fins protrude from the base. By flowing a refrigerant, such as water, between adjacent fins, heat from the heating element is transferred to the refrigerant (see, for example, Patent Document 1).

[0003] [Prior art literature]

[0004] [Patent Document]

[0005] [Patent Document 1] China Patent Application Publication No. 106546116

[0006] However, conventional heat dissipation components still have room for improvement in cooling performance. Summary of the Invention

[0007] In view of the above circumstances, an object of the present invention is to provide a heat dissipation component capable of improving cooling performance.

[0008] A heat sink component according to an example of the present invention comprises: a plate-shaped base extending in a first direction along the direction of refrigerant flow and in a second direction perpendicular to the first direction, and having a thickness in a third direction perpendicular to the first and second directions; and a heat sink protruding from the base toward one side of the third direction, extending in the first direction, and provided in plurality in a second direction, for guiding the refrigerant along a plane intersecting the second direction. At least one of the heat sinks comprises a first heat sink. The at least one heat sink comprises at least one of a second heat sink and a third heat sink. The second heat sink is connected to the downstream side of the first heat sink, i.e., the first side, and has an end in the third direction closer to the other side of the third direction than an end in the third direction of a flow path formed between the first heat sink and a heat sink adjacent to the first heat sink in the second direction. The third heat sink is connected to the other side of the first heat sink and has an end in the third direction closer to the other side of the third direction than the end in the third direction of the flow path.

[0009] Effects of the Invention

[0010] According to the exemplary heat dissipation component of the present invention, cooling performance can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a perspective view of a heat dissipation component according to an exemplary embodiment of the present invention.

[0012] Figure 2 This is a side view of the heat dissipation member as viewed from one side in the second direction.

[0013] Figure 3 This is a plan view of the heat dissipation component as viewed from one side in the third direction.

[0014] Figure 4 This is a partial enlarged view of the upstream side heat sink group of the heat dissipation component.

[0015] Figure 5 It is a partially enlarged view showing the structure near the upstream fin group and the center fin group.

[0016] Figure 6 It is a diagram schematically showing the flow of the refrigerant near the second fin.

[0017] Figure 7 It is a partially enlarged view showing the structure near the end fin group in the upstream fin group.

[0018] Figure 8 It is a diagram schematically showing the flow of the refrigerant near the third fin.

[0019] Figure 9 It is a partially enlarged view showing the structure near the upstream fin group and the center fin group.

[0020] Figure 10 It is a side view of the central fin group.

[0021] Figure 11 It is a perspective view showing a structural example of a spoiler.

[0022] Figure 12 It is a side view showing a modified example of the number of spoilers arranged.

[0023] Figure 13 It is a side view showing a modified example of the number of spoilers arranged.

[0024] Figure 14 It is a side view of the downstream side heat sink group.

[0025] Figure 15 It is a side view of the downstream side heat sink group.

[0026] Figure 16 It is a side view of the central fin group.

[0027] In the figure: 1 heat dissipation component; 2 base; 3 upstream heat dissipation fin group; 3A, 3B end heat dissipation fin group; 4 central heat dissipation fin group; 5 downstream heat dissipation fin group; 6A heating element; 6A, 6B, 6C heating elements; 7 spoiler; 10 heat dissipation fin portion; 21 third direction one side surface; 22 third direction other side surface; 30, 40, 50 heat dissipation fins; 40S, 50S guide surfaces; 70 opening; 71, 72 protrusions; 71S, 72S opposing surfaces; 100 recess; 301 first Heat sink; 301A bottom plate; 301B wall; 301C top plate; 302 second heat sink; 302A bottom plate; 302B wall; 303 third heat sink; 303A bottom plate; 303B wall; 303C top plate; 401 first heat sink; 402 second heat sink; 403 third heat sink; 501 first heat sink; 502 second heat sink; 503 third heat sink; BT bottom plate; CF connecting heat sink; FP heat sink; S slot; W refrigerant. DETAILED DESCRIPTION

[0028] Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

[0029] In addition, in the accompanying drawings, the first direction is shown as the X direction, X1 is shown as one side of the first direction, and X2 is shown as the other side of the first direction. The first direction is along the direction F of the flow of the refrigerant W, the downstream side is shown as F1, and the upstream side is shown as F2. In addition, the second direction orthogonal to the first direction is shown as the Y direction, Y1 is shown as one side of the second direction, and Y2 is shown as the other side of the second direction. In addition, the third direction orthogonal to the first and second directions is shown as the Z direction, Z1 is shown as one side of the third direction, and Z2 is shown as the other side of the third direction. In addition, the above-mentioned orthogonality also includes intersections at angles slightly deviated from 90 degrees. In addition, the above-mentioned directions do not limit the directions when the heat dissipation component 1 is assembled to various devices.

[0030] <1. Overall structure of heat dissipation components>

[0031] Figure 1 is a perspective view of a heat dissipation member 1 according to an exemplary embodiment of the present invention. Figure 2 This is a side view of the heat dissipation member 1 as viewed from one side in the second direction. Figure 3 This is a plan view of the heat dissipating member 1 as viewed from one side in the third direction.

[0032] The heat dissipation component 1 is a plurality of heat generating bodies 6A, 6B, and 6C ( Figure 2 、 Figure 3) for cooling. Heat generating elements 6A, 6B, and 6C are, for example, power transistors of an inverter included in a traction motor that drives the vehicle's wheels. These power transistors are, for example, IGBTs (Insulated Gate Bipolar Transistors). In this case, heat dissipation component 1 is mounted on the traction motor. The number of heat generating elements may be multiple, other than three.

[0033] The heat dissipating member 1 includes a base portion 2 and a fin portion 10. The fin portion 10 includes an upstream fin group 3, a center fin group 4, and a downstream fin group 5.

[0034] The base 2 is in the shape of a plate that extends in the first and second directions and has a thickness in the third direction. The base 2 is made of a metal with high thermal conductivity, such as a copper plate.

[0035] The upstream fin group 3, the central fin group 4, and the downstream fin group 5 are arranged in this order from the other side in the first direction (the upstream side) toward the one side in the first direction (the downstream side) on the third direction side of the base 2. As will be described later, the fin groups 3, 4, and 5 are fixed to the third direction side surface 21 of the base 2 by, for example, brazing.

[0036] The heating elements 6A, 6B, and 6C are in direct or indirect contact with the other side surface 22 of the third direction of the base 2 ( Figure 2 ). When viewed from the third direction, the heating elements 6A, 6B, and 6C overlap with the heat sink groups 3, 4, and 5 respectively ( Figure 3 ).

[0037] Refrigerant W is supplied to the upstream fin group 3 from the upstream side of the upstream fin group 3. The refrigerant W flows sequentially through the fin groups 3, 4, and 5 and is discharged downstream from the downstream fin group 5. At this time, the heat generated by the heat generating elements 6A, 6B, and 6C transfers to the refrigerant W via the base 2 and the fin groups 3, 4, and 5, respectively. As a result, the heat generating elements 6A, 6B, and 6C are cooled.

[0038] <2. Formation Method of Heat Sink Assembly>

[0039] Here, refer to Figure 4 An example of a specific method of forming the fin portion 10 (the fin groups 3 , 4 , and 5 ) will be described. Figure 4 It is a partially enlarged view of the upstream side fin group 3 of the heat dissipation component 1 .

[0040] The heat sink groups 3, 4, and 5 are formed by arranging multiple heat sinks FP along the second direction, forming a so-called stacked heat sink. Heat sinks FP are formed from metal plates, such as copper plates, extending in the first direction. Heat sinks FP1, FP2, FP3, FP4, FP5, and FP6 shown in the figure are all types of heat sinks FP. That is, FP is used as a general symbol for heat sinks.

[0041] exist Figure 4 In order to understand the heat dissipation plate FP, the heat dissipation plate FP located on the other side of the second direction is shown by hatching. The heat dissipation plate FP has heat dissipation fins 30, 40, and 50. In addition, the heat dissipation fins 40 and 50 are arranged on the Figure 1 As shown in the figure, the heat sinks 30, 40, and 50 constitute heat sink groups 3, 4, and 5 respectively.

[0042] like Figure 4 As shown, the heat sink 30 includes a first heat sink 301 , a second heat sink 302 and a third heat sink 303 .

[0043] The first heat sink 301 includes a bottom plate portion 301A, a wall portion 301B, and a top plate portion 301C. The wall portion 301B is plate-shaped, extending in the first and third directions, with its thickness in the second direction. The bottom plate portion 301A is formed by bending from the end portion of the wall portion 301B on the other side of the third direction toward one side of the second direction. The top plate portion 301C is formed by bending from the end portion of the wall portion 301B on one side of the third direction toward one side of the second direction. The bottom plate portion 301A and the top plate portion 301C are opposed to each other in the third direction. As a result, the first heat sink 301 has a U-shaped cross-section when cut perpendicular to the first direction.

[0044] The bottom plate portion 301A and bottom plate portions 302A and 303A described later are parts of the bottom plate portion BT extending over the entire length of the heat dissipation plate FP in the first direction.

[0045] The second heat sink 302 is connected to one side of the first heat sink 301 in the first direction and comprises a bottom plate portion 302A and a wall portion 302B. The wall portion 302B is plate-shaped, extending in the first and third directions, with its thickness in the second direction. The wall portion 302B is connected to one side of the wall portion 301B in the first direction. The end surface of the wall portion 302B on one side of the third direction is positioned closer to the other side of the third direction than the end surface of the wall portion 301B on one side of the third direction.

[0046] The bottom plate portion 302A is formed by bending from the other end of the wall portion 302B in the third direction toward one side in the second direction. As a result, the second heat sink 302 has an L-shaped cross-section when cut perpendicularly to the first direction. The functions of the second heat sink 302 will be described later.

[0047] The third heat sink 303 is connected to the other side of the first heat sink 301 and comprises a bottom plate 303A, a wall 303B, and a top plate 303C. The wall 303B is plate-shaped, extending in the first and third directions and having a thickness in the second direction. The wall 303B is connected to the other side of the wall 301B in the first direction.

[0048] The bottom plate portion 303A is formed by bending from the end portion of the wall portion 303B on the other side of the third direction toward one side of the second direction. The top plate portion 303C is formed by bending from the end portion of the wall portion 303B on one side of the third direction toward one side of the second direction. The bottom plate portion 303A and the top plate portion 303C are opposed to each other in the third direction. As a result, the third heat sink 303 has a U-shaped cross-section when cut perpendicular to the first direction. The end surface of the top plate portion 303C on one side of the third direction is positioned closer to the other side of the third direction than the end surface of the wall portion 301B on one side of the third direction. The functions of the third heat sink 303 will be described later.

[0049] The heat sink 40 includes a first heat sink 401, a second heat sink 402, and a third heat sink 403, and is constructed similarly to the heat sink 30 ( Figure 1 ). In addition, the heat sink 50 includes a first heat sink 501, a second heat sink 502, and a third heat sink 503, and is constructed in the same manner as the heat sink 30 ( Figure 1 ).

[0050] In addition, Figure 4 The heat sink FP (FP1) shown with hatching in FIG. 1 has only a portion of the bottom plate portion BT between the heat sinks 30 and 40 and between the heat sinks 40 and 50. Figure 4 As shown, the heat sink FP includes not only a portion of the bottom plate portion BT but also a connecting heat sink CF (heat sink FP2) between the heat sinks 30 and 40 and between the heat sinks 40 and 50. The connecting heat sink CF connects the wall portion (e.g., 302A) on the other side of the first direction and the wall portion (e.g., 403A) on one side of the first direction. Figure 4 ))Connect in the first direction.

[0051] In the second direction other side end region R2 ( Figure 3 ), heat sinks FP (first type heat sink FP1) without the above-mentioned connecting fins CF and heat sinks FP (second type heat sink FP2) with the connecting fins CF are alternately arranged in the second direction. Figure 4As shown, in the end portion of the second direction side region R2 on the other side, a heat sink FP (a third type heat sink FP3) having only a wall portion 303B is arranged as a third heat sink 303. In the second direction side region R2 on the other side, by arranging the heat sinks FP1, FP2, and FP3 in the second direction, a plurality of third heat sinks 303 are arranged in the second direction at the end portion on the first direction side in the second direction side region R2 on the other side. Thus, an end heat sink group 3A ( Figure 4 ).

[0052] In addition, in the second direction one side end region R1 ( Figure 3 ), the heat dissipation plates FP1 and FP2 are alternately arranged in the second direction. Furthermore, at the second direction one side end portion of the second direction one side end region R1, a flat heat dissipation plate FP4 (a fourth type of heat dissipation plate) is arranged, which extends in the first and third directions and has the second direction as its thickness direction. Figure 3 ).

[0053] In the second direction one side end region R1, by arranging the heat dissipation plates FP1, FP2, and FP4 in the second direction, a plurality of third heat dissipation fins 303 are arranged in the second direction at the end portion on the other side in the first direction in the second direction one side end region R1. Thus, an end heat dissipation fin group 3B ( Figure 1 ).

[0054] Furthermore, in the region between the end region R1 on one side in the second direction and the end region R2 on the other side in the second direction, among the heat dissipation plates FP1 and FP2, the heat dissipation plates FP5 and FP6 (fifth and sixth types of heat dissipation plates) that do not have the third heat dissipation fins 303 on the other side in the first direction are alternately arranged in the second direction ( Figure 4 Thus, a recessed portion 100 is formed between the end fin groups 3A and 3B, which is recessed toward the other side of the third direction. Figure 1 ).

[0055] In this manner, the various heat sinks FP are arranged along the second direction and integrated, for example, by riveting, to form the heat sink section 10 (heat sink groups 3, 4, and 5). This formed heat sink section 10 is secured to one side surface 21 of the base 2 in the third direction, for example, by brazing. By constructing the heat sink section 10 using heat sinks FP, which integrate the heat sinks 30, 40, and 50 in the first direction, the rigidity of the heat sink component 1 can be improved, even when the thickness of the base 2 is reduced for improved thermal conductivity, thereby suppressing deflection caused by the flow of the refrigerant W.

[0056] With this structure, in the fin groups 3, 4, and 5, the refrigerant W flows through the flow path formed by the fins 30, 40, and 50 adjacent to each other in the second direction. At this point, the refrigerant W flows over the bottom plate portion BT. If the heat sink FP does not have a bottom plate portion BT, the refrigerant W flows over the base portion 2. For example, in the case of the fin 30, the refrigerant W is guided along the wall surfaces (surfaces perpendicular to the second direction) of the wall portions 303B, 301B, and 302B.

[0057] Specifically, the heat dissipating member 1 includes fins 30 , 40 , 50 that protrude from the base 2 toward one side in the third direction, extend in the first direction, are arranged in plurality in the second direction, and guide the refrigerant W along a plane intersecting the second direction.

[0058] The heat dissipating member 1 is configured by arranging a plurality of heat dissipating fins 30 , 40 , 50 in the second direction, which protrude from the base 2 toward one side in the third direction and extend in the first direction, and includes a plurality of heat dissipating fin groups 3 , 4 , 5 arranged in the first direction.

[0059] <3. Downstream and upstream fins>

[0060] Next, the second fins 302 and 402 disposed on the downstream side of the fins 30 and 40 will be described in more detail. Figure 5 、 Figure 6 , the second heat sink 302 is taken as an example for description, but the contents of the second heat sink 402 are also the same.

[0061] Figure 5 This is a partial enlarged view showing the structure near the upstream fin group 3 and the central fin group 4. Figure 5 As shown, a plurality of second heat sinks 302 are arranged in the second direction. An end on one side in the third direction of the second heat sink 302 is located closer to the other side in the third direction than an end on one side in the third direction of a flow path FP formed between the first heat sink 301 and a heat sink 30 adjacent to the first heat sink 301 in the second direction.

[0062] Here, Figure 6 3 is a diagram schematically showing the flow of the refrigerant W near the second heat sink 302 . Figure 6 The left side is a side view observed from the second direction, Figure 6 The right side of the diagram is a top view from the third direction. This allows the refrigerant W flowing through flow path FP to flow into the portion of the second heat sink 302 on the third direction side, thereby generating eddy currents V1 at the boundary between the first heat sink 301 and the second heat sink 302. This promotes mixing of the refrigerant W near the third direction side of the second heat sink 302.

[0063] Here, if Figure 3 As shown, the ends of the heat generating element 6A in the second direction are positioned closer to the center in the second direction. Therefore, less heat transfer occurs to the refrigerant W1 flowing through the ends of the fin group 3 in the second direction, resulting in a relatively low temperature. In contrast, more heat transfer occurs to the refrigerant W2 flowing through the center in the second direction of the fin group 3, resulting in a relatively high temperature. However, as described above, mixing of refrigerants W1 and W2 is promoted at the downstream outlet of the fin group 3. This promotes uniformity in the temperature of the refrigerant W, improving the cooling performance of the fin group 4 on the downstream side.

[0064] In addition, if Figure 5 As shown, a connecting fin CF is formed between the second heat sink 302 and the fins 40 in the rear-stage heat sink group 4, and a space is formed on one side of the connecting fin CF in the third direction. Alternatively, a space may be formed between the second heat sink 302 and the rear-stage heat sink 40 without forming a connecting fin CF. The space formed as described above forms a groove S. The groove S improves cooling performance by preventing the growth of a boundary layer between the heat sinks, mixes the refrigerant W discharged from the downstream outlet of the heat sink group 3, and reduces pressure loss. Furthermore, the provision of the connecting fin CF improves the rigidity of the heat sink component 1 and increases the contact area with the refrigerant W in the groove S, thereby improving cooling performance.

[0065] In addition, if Figure 6 As shown, the refrigerant W flows from one side of the second heat sink 302 in the third direction toward the connecting fins CF or the bottom plate BT. Furthermore, the refrigerant W flowing along the second heat sink 302 flows into the connecting fins CF or the bottom plate BT in the third direction, generating eddy currents V2. These eddy currents V2 promote mixing of the refrigerant W in the grooves S. Consequently, the temperature of the refrigerant W is further uniformed, improving the cooling performance of the rear-stage heat sink group 4.

[0066] Furthermore, as described above, since the second fins 302 enhance the turbulence generation effect, even when the refrigerant W flows into the rear fin group 4 due to the turbulence, growth of the boundary layer can be suppressed, thereby improving cooling performance.

[0067] Next, the third fins 303 , 403 , and 503 arranged on the upstream side among the fins 30 , 40 , and 50 will be described in more detail.

[0068] Figure 7This is a partially enlarged view showing the structure near the end fin group 3A of the upstream fin group 3. The end on one side in the third direction of the third fin 303 is positioned further to the other side in the third direction than the end on one side in the third direction of the flow path FP formed on both sides in the second direction of the first fin 301.

[0069] Here, Figure 8 3 is a diagram schematically showing the flow of the refrigerant W near the third fin 303 . Figure 8 The left side is a side view observed from the second direction, Figure 8 The right side of the figure is a top view viewed from the third direction. Thus, refrigerant W flowing from the base 2 flows into both sides of the third heat sink 303 in the second direction, generating eddy currents V11 near the ends of the third heat sink 303 on the other side in the first direction. Furthermore, refrigerant W flowing from the third heat sink 303 flows into both sides of the first heat sink 301 in the second direction, generating eddy currents V12 near the ends of the first heat sink 301 on the other side in the first direction. Furthermore, refrigerant W flowing from the base 2 flows into the ends of the third heat sink 303 on one side in the third direction on the other side in the first direction, generating eddy currents V13.

[0070] Thus, by providing the third fins 303, the turbulence generation effect is enhanced, the straightening of the refrigerant W flowing into the fin group 3 is delayed, and the growth of the boundary layer is suppressed, thereby improving cooling performance. In addition, the turbulence generation effect generated by the third fins 303 is greater than that generated by the second fins 302.

[0071] in addition, Figure 9 This is a partial enlarged view showing the structure near the upstream fin group 3 and the central fin group 4. Figure 9 Similar to the effects described above, the third fin 403 in the illustrated fin group 4 generates an eddy current V11 at the boundary connecting the heat sink CF or the bottom plate BT and the third fin 403, and eddy currents V12 and V13 are generated on one side of the third direction of the third fin 403. This enhances the turbulence generation effect and improves the cooling performance of the refrigerant W flowing into the fin group 4. The third fin 503 in the heat sink 50 also exhibits the same effects.

[0072] In addition, any of the heat sinks 30, 40, and 50 may not include the second heat sink and the third heat sink. In addition, any of the heat sinks 30, 40, and 50 may include only one of the second heat sink and the third heat sink.

[0073] That is, in this embodiment, at least one of the heat sinks 30 includes a first heat sink 301. The at least one of the heat sinks 30 includes at least one of a second heat sink 302 and a third heat sink 303. The second heat sink 302 is connected to one side of the first heat sink 301 in the first direction and has an end in the third direction closer to the other side of the third direction than an end in the third direction of a flow path FP formed between the first heat sink 301 and a heat sink 30 adjacent to the first heat sink 301 in the second direction. The third heat sink 303 is connected to the other side of the first heat sink 301 in the first direction and has an end in the third direction closer to the other side of the third direction than an end in the third direction of the flow path FP.

[0074] Furthermore, at least one of the heat sinks 30 includes a second heat sink 302. A gap in the first direction is formed between the second heat sink 302 and the subsequent heat sink 40 disposed on one side of the second heat sink 302 in the first direction.

[0075] Furthermore, the heat dissipating member 1 includes a connecting fin CF connecting at least one of the second heat dissipating fins 302 and the rear-stage heat dissipating fin 40 in the first direction.

[0076] <4. Inclined shape>

[0077] Here, Figure 10 It is a side view of the central fin group 4. Figure 10 As shown, the first direction length L3 of the third heat sink 403 is longer than the first direction length L2 of the second heat sink 402. Since the refrigerant WU that does not undergo heat exchange flows into the flow path formed by the heat sink 40 from one side of the third direction of the third heat sink 403, Figure 10 As shown by the dashed lines in the figure, the peak of cooling performance degradation is located downstream of the center of the fins 40 in the first direction. This improves cooling performance downstream of the heat generating element 6B. This configuration also achieves the same effect as the downstream fin group 5.

[0078] <5. End heat sink assembly>

[0079] As described above, the end fin groups 3A and 3B are formed in the fin section 10. In addition, on the downstream side of the downstream fin group 5, an end fin group may be formed by the second fins 502 at both ends in the second direction.

[0080] Specifically, heat sink 1 is formed by arranging a plurality of second heat sinks 502 or third heat sinks 303 adjacent to each other in the second direction, and includes end fin groups disposed at both ends of the heat sink groups 5, 3, comprised of the plurality of heat sinks 50, 30, in the second direction. Recesses 100, recessed toward the other side in the third direction, are formed between the end fin groups. This allows the operator to avoid incorrectly aligning the heat sink 1 when installing the component by confirming the presence of recesses 100.

[0081] Furthermore, the end fin groups are preferably formed by the upstream fin group 3. Specifically, the end fin groups 3A and 3B are formed by the third fins 303, and among the multiple fin groups 3, 4, and 5 arranged in the first direction, the fin group 3 is arranged furthest from the other side in the first direction. Thus, by providing the recess 100 on the upstream side, the flow resistance of the refrigerant W on the central side in the second direction when it flows into the fin group 3 can be reduced, thereby improving the cooling performance of the heat generating element 6A located on the central side in the second direction of the fin group 3.

[0082] In other words, at the end portion on the other side in the first direction of the heat sink group 3 arranged closest to the other side in the first direction, or at the end portion on one side in the first direction of the heat sink group 5 arranged closest to the one side in the first direction, there are end heat sink groups 3A and 3B arranged at both ends in the second direction, and a recess 100 recessed toward the other side in the third direction is formed between the end heat sink groups 3A and 3B.

[0083] Furthermore, the end fin groups 3A and 3B are preferably included in the fin group 3 arranged furthest to the other side in the first direction.

[0084] <6. Spoiler>

[0085] like Figure 1 、 2 As shown, in the central fin group 4 and the downstream fin group 5 , spoilers 7 are formed on the fins 40 and 50 .

[0086] Here, Figure 11 A perspective view showing an example structure of the baffle 7. The heat sinks 40 and 50 have guide surfaces 40S and 50S extending in the first direction to guide the refrigerant W. The baffle 7 has an opening 70 that penetrates the heat sinks 40 and 50 in the second direction. The baffle 7 has protrusions 71 and 72. The protrusions 71 and 72 are formed by bending the edges of the opening 70 toward one side of the same second direction and are opposed to each other in the first direction. The opening 70 and the protrusions 71 and 72 can be formed by cutting notches in the heat sinks 40 and 50 and then bending them. The protrusion 71 is positioned closer to the other side of the first direction than the protrusion 72.

[0087] The protrusions 71 and 72 have opposing surfaces 71S and 72S that face one side of the first direction, which is the direction in which the refrigerant W flows. The opposing surfaces 71S and 72S are contained within the protrusions 71 and 72. The baffle 7 has the function of obstructing the flow of the refrigerant W via the opposing surfaces 71S and 72S. This facilitates turbulent flow of the refrigerant W near the opposing surfaces 71S and 72S, thereby improving the cooling performance of the heat sinks 40 and 50.

[0088] The number of protrusions is not limited to two and may be one or three or more. That is, the spoiler 7 has at least one protrusion 71 or 72 protruding from the guide surfaces 40S or 50S in the second direction at the edge of the opening 70. The protrusions 71 or 72 can be easily formed as described above.

[0089] Furthermore, the at least one protrusion 71 or 72 is provided in plural. Thus, since a plurality of opposing surfaces 71S or 72S are provided, the number of locations where turbulent flow is generated can be increased, thereby further improving the cooling performance.

[0090] In addition, the protrusions 71 and 72 are inclined toward one side of the first direction and toward the other side of the third direction. As a result, the refrigerant W can be guided toward the heating elements 6B and 6C by the protrusions 71 and 72, thereby improving the cooling performance. Furthermore, two protrusions 71 and 72 are provided, and they protrude in the same direction. As a result, by allowing the refrigerant W to pass between the two opposing protrusions 71 and 72, the refrigerant W can be guided toward the heating elements 6B and 6C. In addition, the protrusions 71 and 72 may also protrude in different directions.

[0091] In the heat sink groups 4 and 5, for example, the heat sinks 40 and 50 other than the heat sinks 40 and 50 located at one end in the second direction are provided with a spoiler 7. That is, at least one heat sink 40 and 50 included in at least one heat sink group 4 and 5 has a spoiler 7. Figure 2 As shown, for example, in the heat sinks 30, 40, 50 at the same second direction position, the number of the spoilers 7 is 0, 4, and 6. Figure 12 As shown, in the heat sinks 30, 40, 50 at the same second direction position, the number of spoilers 7 can be set to 2, 4, or 6. The number of spoilers 7 can be adjusted after being provided on the heat sink 30. Figure 13 As shown, in the heat sinks 30 , 40 , and 50 at the same second direction position, the number of spoilers 7 may be 0, 4, 4, or the like, and the number may be the same on the downstream side.

[0092] Specifically, the number of baffles 7 included in each of the heat sinks 30, 40, and 50 at the same second-direction position in the plurality of heat sink groups 3, 4, and 5 increases as the number of baffles increases toward the first direction. When heat sinks 6A, 6B, and 6C are arranged in the first direction, the temperature of the refrigerant W increases toward the downstream side, necessitating improved cooling performance on the downstream side. Therefore, by increasing the number of baffles 7 toward the downstream side, cooling performance can be improved on the downstream side, where it is desired, thereby suppressing temperature differences between the heat sinks 6A, 6B, and 6C.

[0093] In addition, if Figure 14 As shown, in at least any one heat sink group 5, at least a portion of the protrusion 72 on one side in the third direction is arranged on one side in the third direction relative to a heat sink end T2 serving as an end on one side in the third direction, which is located on the other side in the third direction relative to an end T1 on one side in the third direction closest to one side in the third direction in the heat sink 50, when viewed from the second direction, and at least a portion of the protrusion 71 on the other side in the third direction is arranged on the other side in the third direction relative to the above-mentioned heat sink end T2.

[0094] In addition, if Figure 14 As shown, the spoiler 7 is positioned alternately in the order of one side of the third direction, the other side of the third direction as it moves toward one side of the first direction.

[0095] The baffle 7A (high-level baffle) located on the most upstream side and on one side of the third direction forcibly guides the refrigerant W moving away from the base 2 toward the one side of the third direction toward the base 2. The baffle 7B (low-level baffle) located on the other side of the third direction guides the refrigerant W so that it collides with the surface on the side of the base 2. The baffle 7C (other than the most upstream side) located on one side of the third direction causes the refrigerant W that collides with the surface on the side of the base 2 and rebounds to return to the base 2.

[0096] In addition, if Figure 15 As shown, in at least any one heat sink group 5, the baffles 7 are alternately arranged along the first direction in the third direction, and the first direction interval La between the baffles 7D and 7E that are adjacent in the first direction and whose other side in the first direction is closer to the other side of the third direction than to one side of the first direction is shorter than the first direction interval Lb between the baffles 7E and 7F that are adjacent in the first direction and whose other side in the first direction is closer to one side of the third direction than to one side of the first direction.

[0097] The refrigerant W directed toward the base 2 by the baffle 7D on the other side of the first direction rebounds with good momentum on the surface of the base 2, thereby directing the refrigerant W back toward the base 2. Therefore, the interval between the baffles 7D and 7E needs to be shortened. The refrigerant W directed toward the base 2 by the baffle 7E on one side of the first direction rebounds with less momentum than the refrigerant W directed toward the base 2 by the baffle 7D on the other side of the first direction. Therefore, the interval between the baffles 7E and 7F can be longer.

[0098] In addition, if Figure 16 As shown, the center position of the heat sink 40 in the first direction is set as the reference = 0, the upstream side is set as +, and the downstream side is set as -. Furthermore, if the center of gravity (average) of the position x of each spoiler 7 of the heat sink 40 relative to the reference is taken, the center of gravity is on the downstream side (-).

[0099] That is, in at least one heat sink group 4, the center of gravity of the spoiler 7, relative to the center position of the heat sink 40 in the first direction, is located further to one side in the first direction than the center position in the first direction. This improves the cooling performance of the downstream portion of the heat sink 6B overlapping the heat sink group 4 when viewed from the third direction, where the cooling performance should be improved.

[0100] In addition, if Figure 2 As shown, the spoiler 7 is not provided in the upstreammost fin group 3. That is, the spoiler 7 located closest to the other side in the first direction among the multiple fin groups 3, 4, and 5 is included in the fin group 4 located further to the one side in the first direction than the fin group 3 located closest to the other side in the first direction. This eliminates the need for spoiler 7 in the upstreammost fin group 3, where improved cooling performance is less required. This reduces the processing cost of forming the spoiler 7.

[0101] In other words, the heat sink group 4 composed of multiple heat sinks 40 is arranged on the one side of the first direction more than the heat sink group 3 closest to the other side of the first direction among the multiple heat sink groups 3, 4, and 5 arranged along the first direction, and the spoiler 7 closest to the other side of the first direction among the multiple heat sink groups 3, 4, and 5 is arranged closest to the other side of the first direction among the spoilers 7 arranged in the first direction.

[0102] <7. Others>

[0103] The above describes the embodiments of the present invention. In addition, the scope of the present invention is not limited to the above-mentioned embodiments. The present invention can be implemented by making various changes to the above-mentioned embodiments without departing from the scope of the invention. In addition, the matters described in the above-mentioned embodiments can be appropriately combined in any manner within the scope that does not cause contradiction.

[0104] For example, a structure in which a heat spreader or a heat pipe is provided between the heating element and the heat dissipation member may be adopted.

[0105] Industrial applicability

[0106] The present invention can be used for cooling various heating elements.

Claims

1. A heat dissipation component, characterized in that: have: a plate-shaped base portion that extends in a first direction along a refrigerant flow direction and in a second direction perpendicular to the first direction and has a thickness in a third direction perpendicular to the first and second directions; and a heat sink protruding from the base toward one side of the third direction, extending in the first direction, and being arranged in plurality in the second direction to form a heat sink group, and guiding the refrigerant along a surface intersecting the second direction; At least any one of the heat sinks has a first heat sink, The at least one heat sink comprises at least one of a second heat sink and a third heat sink. The second heat sink is connected to the downstream side of the first heat sink, that is, the one side in the first direction. An end of the second heat sink on the one side in the third direction is located closer to the other side in the third direction than an end on the one side in the third direction of a flow path formed between the first heat sink and a heat sink adjacent to the first heat sink in the second direction. The third heat sink is connected to the other side of the first direction of the first heat sink, and the position of the end of the third heat sink on one side of the third direction is closer to the other side of the third direction than the position of the end of the flow path on one side of the third direction formed on both sides of the first heat sink in the second direction. The heat dissipation component has a plurality of heat dissipation fin groups arranged in a first direction. At the end portion on the other side of the first direction of the heat sink group disposed closest to the other side of the first direction, or at the end portion on one side of the first direction of the heat sink group disposed closest to one side of the first direction, there are end heat sink groups disposed at both ends in the second direction. A recessed portion recessed toward the other side of the third direction is formed between the end fin groups.

2. The heat dissipation component according to claim 1, characterized in that The at least one heat sink has the second heat sink, A gap in the first direction is formed between the second heat sink and a subsequent heat sink disposed on one side of the second heat sink in the first direction.

3. The heat dissipation component according to claim 2, characterized in that: A connecting fin is provided, and the connecting fin connects at least any one of the second fins and the rear-stage fin in a first direction.

4. The heat dissipation component according to claim 1, wherein The length of the third heat sink in the first direction is longer than the length of the second heat sink in the first direction.

5. The heat dissipation component according to claim 1, characterized in that The end fin group is formed by a plurality of the second fins or the third fins being adjacent to each other in the second direction.

6. The heat dissipation component according to claim 5, characterized in that: The end heat sink group is composed of a plurality of the third heat sinks. The fin group connected to the end fin group is arranged closest to the other side in the first direction among the plurality of fin groups arranged in the first direction.

7. The heat dissipation component according to claim 1, characterized in that At least one of the heat sinks has a spoiler having an opposing surface facing one side in the first direction. The center of gravity of the spoiler, based on the center position of the heat sink in the first direction, is located on one side in the first direction relative to the center position in the first direction.

8. The heat dissipation component according to claim 1, characterized in that At least one of the heat sinks has a spoiler having an opposing surface facing one side in the first direction. The spoiler disposed closest to the other side in the first direction among the plurality of fin groups is included in a fin group disposed closer to the one side in the first direction than the fin group disposed closest to the other side in the first direction.

Images