Cooling device

Abstract

To provide a cooling apparatus capable of suppressing an increase in pressure loss while improving cooling performance.SOLUTION: A cooling apparatus 1 comprises a housing 11 and a fin 13. The housing 11 is provided with a channel FP and a groove 14. The channel FP is extended in a width direction and each of flow directions crossing the width direction. The groove 14 is depressed in the width direction from the channel FP. The fin 13 includes a flat plate part 13a, a plurality of twisted parts 13b, and a protrusion 13c. The protrusion 13c of the fin 13 is fitted into the groove 14 of the housing 11. Each of the plurality of twisted parts 13b is twisted in the flow direction. The two or more twisted parts 13b are provided in the width direction, and the one or more twisted parts are provided in the flow direction.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to a cooling device. [Background technology]

[0002] In recent years, the heat generation density has increased as electronic devices have become more compact, denser, and more powerful. This has led to a demand for higher performance cooling devices to ensure stable operation of electronic devices.

[0003] As an example of such a cooling device, Japanese Patent Application Laid-Open No. 2010-114174 (Patent Document 1) describes a heat sink for cooling semiconductor chips and the like. This heat sink includes a casing and a heat sink core inserted into the casing. The regularly arranged diagonal members of the heat sink core cause the coolant to rotate in a spiral along the flow path. As a result, the coolant passes through the flow path while being agitated. This improves cooling performance. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-114174 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the heat sink described in the above publication, pressure loss increases due to vortices that are generated when the coolant is stirred.

[0006] The present disclosure has been made in view of the above-mentioned problems, and an object of the present disclosure is to provide a cooling device that can improve cooling performance while suppressing an increase in pressure loss. [Means for solving the problem]

[0007] The cooling device of the present disclosure includes a housing and fins. The housing is provided with flow channels and grooves. The flow channels extend in both the width direction and a flow direction intersecting the width direction. The grooves are recessed in the width direction from the flow channels. The fins include a flat plate portion, multiple twisted portions, and a protruding portion. The flat plate portion is disposed inside the flow channels of the housing. The multiple twisted portions are disposed inside the flow channels and connected to the flat plate portion in the flow direction. The protruding portion protrudes in the width direction from the flat plate portion. The protruding portion of the fin is fitted into the groove of the housing. Each of the multiple twisted portions is twisted along the flow direction. Two or more of the multiple twisted portions are provided in the width direction, and one or more are provided in the flow direction. [Effects of the Invention]

[0008] According to the cooling device of the present disclosure, the fins can improve cooling performance while suppressing an increase in pressure loss. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic diagram showing an overall configuration of a system including a cooling device and a refrigerant driving device according to a first embodiment. [Figure 2] FIG. 2 is a schematic diagram showing the overall configuration of a system different from that shown in FIG. 1. [Figure 3] 1 is a perspective view schematically illustrating a configuration of a cooling device according to a first embodiment. [Figure 4] 1 is a side view schematically showing the configuration of a cooling device according to a first embodiment. [Figure 5] FIG. 5 is a cross-sectional view taken along line VV in FIG. [Figure 6] 1 is a front view schematically showing the configuration of a cooling device according to a first embodiment. [Figure 7] FIG. 10 is a front view schematically showing the configuration of a modified example of the cooling device according to the first embodiment. [Figure 8] FIG. 2 is a perspective view schematically illustrating the configuration of a fin according to the first embodiment. [Figure 9] FIG. 2 is a front view schematically showing the configuration of a fin according to the first embodiment. [Figure 10] FIG. 2 is a plan view schematically illustrating the configuration of a fin according to the first embodiment. [Figure 11] FIG. 11 is an end view taken along line XI-XI in FIG. [Figure 12] FIG. 12 is an end view taken along line XII-XII in FIG. [Figure 13] FIG. 13 is an end view taken along line XIII-XIII in FIG. [Figure 14] FIG. 10 is a perspective view schematically illustrating the configuration of a fin according to a second embodiment. [Figure 15] FIG. 11 is a perspective view schematically illustrating the configuration of a fin according to a third embodiment. [Figure 16] FIG. 10 is a perspective view schematically illustrating the configuration of a fin according to a fourth embodiment. [Figure 17] FIG. 17 is a cross-sectional view taken along line XVII-XVII in FIG. [Figure 18] FIG. 17 is a cross-sectional view taken along line XVIII-XVIII in FIG. [Figure 19] FIG. 19 is a cross-sectional view taken along line XIX-XIX in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments will be described with reference to the drawings. In the following, the same or corresponding parts will be denoted by the same reference numerals, and overlapping descriptions will not be repeated.

[0011] Embodiment 1 The configuration of a system including a cooling device 1 and a refrigerant driving device 2 according to embodiment 1 will be described with reference to Figures 1 and 2. Figures 1 and 2 are schematic diagrams showing the overall configuration of a system including a cooling device 1 and a refrigerant driving device 2 according to embodiment 1.

[0012] Fig. 1 is a schematic diagram showing a system in which a refrigerant 3 sent to a cooling device 1 by a refrigerant drive unit 2 receives heat in the cooling device 1, dissipates heat to the external environment, and then returns to the refrigerant drive unit 2, thereby circulating the refrigerant 3. Fig. 2 is a schematic diagram showing a system in which the refrigerant 3 sent to the cooling device 1 by the refrigerant drive unit 2 directly dissipates the heat received in the cooling device 1 to the external environment. The refrigerant 3 is not particularly limited as long as it is a gas or liquid, and examples include air, hydrogen, water, ethanol, and acetone.

[0013] In this embodiment, the cooling device 1 is an electronic device cooling device attached to a heat-generating electronic device. When the refrigerant drive device 2 is an air-cooled type, a fan is used. When the refrigerant drive device 2 is a water-cooled type, a pump is used. The fan is not particularly limited, and examples include an axial fan, a centrifugal fan, a mixed flow fan, and a cross-flow fan. Similarly, the pump is not particularly limited, and examples include a turbo pump (axial flow pump, centrifugal pump, or mixed flow pump), a positive displacement pump, and the like. The pump may also be a pump that uses the jet injection force of water or steam, or a pump that uses compressed air.

[0014] The configuration of the cooling device 1 according to the first embodiment will be described with reference to Figs. 3 to 6. Fig. 3 is a perspective view of the cooling device 1. Fig. 4 is a side view of the cooling device 1. Fig. 5 is a cross-sectional view taken along line VV in Fig. 4. Fig. 6 is a front view of the cooling device 1. For ease of explanation, Figs. 3, 4, and 6 show the cooling device 1 with the element 12 attached. Hereinafter, where appropriate, coordinate axes are indicated in the drawings, with the flow direction of the cooling device 1 designated as the X-axis, the width direction designated as the Y-axis, and the height direction designated as the Z-axis. The flow direction, width direction, and height direction are perpendicular to one another. The flow direction is the direction in which the refrigerant 3 flows.

[0015] The cooling device 1 includes a housing 11 and fins 13. The housing 11 is provided with a flow path FP and grooves 14. The flow path FP extends in both the width direction and the flow direction. The flow direction intersects with the width direction. The housing 11 includes a top plate 11t, a first side plate 11r, a second side plate 11l, and a bottom plate 11b. The top plate 11t is disposed in the positive direction of the Z axis. The first side plate 11r is disposed in the negative direction of the Y axis. The second side plate 11l is disposed in the positive direction of the Y axis. The bottom plate 11b is disposed in the negative direction of the Z axis. The flow path FP is composed of four flow path walls disposed on the inner sides of the top plate 11t, the first side plate 11r, the second side plate 11l, and the bottom plate 11b. The flow path FP is formed between the four plates: the top plate 11t, the first side plate 11r, the second side plate 11l, and the bottom plate 11b. In this embodiment, the flow path FP is rectangular in shape when viewed from the front. Specifically, the flow path FP is rectangular in shape with its width direction as its longitudinal direction and its height direction as its lateral direction.

[0016] Groove 14 is recessed in the width direction from flow path FP. Groove 14 is provided in housing 11 at the upstream end in the flow direction. Groove 14 has an opening on the upstream side in the flow direction and a bottom on the downstream side in the flow direction. In this embodiment, groove 14 is arranged in the center of flow path FP in the height direction. Both ends of fin 13 in the width direction are inserted into groove 14. The center of fin 13 is arranged inside flow path FP. The refrigerant flows around fin 13 inside flow path FP. In this embodiment, fin 13 has a streamlined twisted shape so that the cross-sectional area of ​​flow path FP is constant in the flow direction when fin 13 is arranged inside flow path FP.

[0017] The material of the housing 11 is not particularly limited, and metals with high thermal conductivity such as aluminum and copper are used as the material of the housing 11.

[0018] In this embodiment, element 12 serving as an electronic device is attached to the top surface of top plate 11t of housing 11. In this embodiment, element 12 is attached to the top surface of top plate 11t of housing 11 via grease or a sheet with excellent thermal conductivity, or a heat spreader or a carbon fiber member (graphite sheet) with high thermal diffusion properties (not shown). Heat from element 12 is dissipated by heat exchange with refrigerant 3 flowing through flow path FP. The size and arrangement of element 12 are not particularly limited. While multiple elements 12 are arranged along the X axis in FIG. 3, multiple elements 12 may be arranged along the Y axis. Furthermore, element 12 may be arranged in the negative direction of the Z axis (the bottom surface of bottom plate 11b of housing 11) rather than in the positive direction of the Z axis (the top surface of top plate 11t of housing 11).

[0019] The cross-sectional shape of the flow path FP in the housing 11 is not particularly limited, and may be a circular (elliptical) cross-sectional shape as shown in Fig. 7. Fig. 7 is a front view of a modified example of the cooling device 1 according to the first embodiment. For ease of explanation, fins 13 are not shown in Fig. 7. In the modified example of the cooling device 1 according to the first embodiment, the cross-sectional shape of the flow path FP in the housing 11 is the same from the upstream end to the downstream end of the flow path FP in the flow direction.

[0020] The structure of the fin 13 will be described with reference to Figures 8 to 10. Figure 8 is a perspective view of the fin 13. Figure 9 is a front view of the fin 13. Figure 10 is a plan view of the fin 13.

[0021] The fin 13 includes a flat plate portion 13a, a plurality of twisted portions 13b, and a protruding portion 13c. The flat plate portion 13a is disposed inside the flow path FP of the housing 11. The flat plate portion 13a is configured in a flat plate shape.

[0022] The multiple twisted portions 13b are arranged inside the flow path FP of the housing 11. The multiple twisted portions 13b are connected to the flat portion 13a in the flow direction. Each of the multiple twisted portions 13b is twisted along the flow direction. Each of the multiple twisted portions 13b is twisted around an imaginary central axis extending in the flow direction. The multiple twisted portions 13b are configured to twist from the flat portion 13a. Each of the multiple twisted portions 13b is sandwiched between the flat portion 13a in the longitudinal direction of the fin 13.

[0023] The multiple twisted portions 13b are provided at two or more locations in the width direction and at least one location in the flow direction. In this embodiment, the fin 13 has eight twisted locations, two in the width direction and four in the flow direction. That is, the fin 13 has eight twisted portions 13b. In this embodiment, the width W, height H, and length L of the flat portion 13a and the multiple twisted portions 13b of the fin 13 are the same as the width, height, and length of the flow path FP of the casing 11. The twist pitch (NP) is the distance between adjacent twisted portions 13b in the flow direction among the multiple twisted portions 13b. The twist pitch (NP) is not particularly limited and may be changed within the scope of the present disclosure.

[0024] The protruding portion 13c protrudes in the width direction from the flat plate portion 13a. The protruding portion 13c is fitted into a groove 14 of the housing 11. The protruding portion 13c is fixed in a state where it is inserted into the groove 14. In this embodiment, the protruding portion 13c is arranged at the upstream end of the fin 13 in the flow direction. In this embodiment, the protruding portion 13c protrudes on both sides in the width direction from the flat plate portion 13a. In this embodiment, the protruding portion 13c is configured in a square shape in a plan view. The downstream end of the protruding portion 13c in the flow direction may be in contact with the bottom of the groove 14 of the housing 11 (see FIG. 5).

[0025] In this embodiment, the fin 13 is composed of two fin members arranged side by side in the width direction. The two fin members are connected in the width direction. The fin 13 may be composed of a single member. The fin 13 can be composed of a single member by forming it using a 3D printer, for example.

[0026] The material of the fins 13 is not particularly limited, and examples thereof include metal materials such as aluminum, copper, and stainless steel, and resin materials such as acrylic and polyimide resin.

[0027] The shape of the end face of the fin 13 will be described with reference to Figures 10 to 13. Figure 11 is an end view taken along line XI-XI in Figure 10. Figure 12 is an end view taken along line XII-XII in Figure 10. Figure 13 is an end view taken along line XIII-XIII in Figure 10. For ease of explanation, Figures 11 to 13 show the fin 13 attached to the housing 11.

[0028] The cross-sectional shape of the fin 13 along line XI-XI at the inlet of the flow path FP is a flat plate parallel to the top plate 11t and bottom plate 11b. From the end face along line XI-XI to the end face along line XII-XII, the cross-sectional shape of the fin 13 gradually slopes counterclockwise. At the end face along line XII-XII, the cross-sectional shape of the fin 13 slopes to the left. From the end face along line XII-XII to the end face along line XIII-XIII, the cross-sectional shape of the fin 13 twists, so the slope direction reverses. At the end face along line XIII-XIII, the cross-sectional shape of the fin 13 slopes to the right. Furthermore, after the end face along line XIII-XIII, the cross-sectional shape of the fin 13 gradually slopes counterclockwise and returns to the cross-sectional shape of the end face along line XI-XI. Thus, the fins 13 are configured so that the cross-sectional shape of the fins 13 repeats in the order of the end face along line XI-XI, the end face along line XII-XII, and the end face along line XIII-XIII. That is, the fins 13 have a cross-sectional shape that continuously changes from extending parallel to the width direction along the flow direction to tilting counterclockwise, reversing the tilt direction at each of the multiple twisted portions 13b, and then tilting counterclockwise again to extend parallel to the width direction. When the cross-sectional shape of the fins 13 changes counterclockwise, a counterclockwise swirling flow is formed in the refrigerant flowing around the fins 13. This agitates the refrigerant, thereby promoting heat transfer.

[0029] The order in which the shape of the end face of the fin 13 changes is not particularly limited, and the cross-sectional shape may change clockwise. That is, the fin 13 may have a cross-sectional shape that changes continuously from extending parallel to the width direction along the flow direction to tilting clockwise, reversing the tilt direction at each of the multiple twisted portions 13b, and then tilting clockwise again to a state extending parallel to the width direction. When the cross-sectional shape of the fin 13 changes clockwise, a clockwise swirling flow is formed in the refrigerant flowing around the fin 13. This agitates the refrigerant, thereby promoting heat transfer.

[0030] The ratio of the lengths of the flat plate portion 13a and the twisted portion 13b in the flow direction is not particularly limited, but it is desirable that the length of the flat plate portion 13a be about twice the length of the twisted portion 13b.

[0031] Because the heat transfer coefficient increases locally in twisted portion 13b, it is desirable to arrange twisted portion 13b directly below element 12, which is a heat generating body. This allows for efficient cooling. Furthermore, it is desirable to arrange each of multiple twisted portions 13b directly below each of multiple elements 12, depending on the arrangement of elements 12, which are heat generating bodies.

[0032] In this embodiment, at the end surface along the line XI-XI, the two fin members of the fin 13 are integral with each other and connected in the width direction.

[0033] Next, a method for fixing the fins 13 will be described.

[0034] As shown in FIG. 11 , protrusions 13c protruding in the width direction on the upstream side of fin 13 in the flow direction are fixed to grooves 14 provided in first side plate 11r and second side plate 11l on the upstream side of casing 11. This fixes fin 13 to casing 11 in the flow direction. Fin 13 is typically fixed by bonding to casing 11, but this method increases pressure loss due to a reduction in the flow path cross-sectional area caused by the thickness of the bonded portion. In contrast, in this embodiment, fin 13 can be fixed to casing 11 without reducing the flow path cross-sectional area by fitting protrusions 13c into grooves 14 of casing 11. This makes it possible to suppress an increase in pressure loss.

[0035] In this embodiment, the height of groove 14 is the same as the thickness of protrusion 13c. The height of groove 14 is not particularly limited as long as protrusion 13c fits into groove 14, and may be set to a dimension that is the thickness of fin 13 plus a tolerance of 0.1 mm, for example.

[0036] 12 and 13, each of the multiple twisted portions 13b has one end (first end) E1 in contact with the top plate 11t and the other end (second end) E2 in contact with the bottom plate 11b in the width direction. In the cross-sectional shape of the fin 13, each of the two fin members is inclined to one side, and both end portions of the two fin members contact the top plate 11t and the bottom plate 11b of the housing 11 at two points, thereby fixing the fin 13 to the housing 11 in the height direction.

[0037] Next, the effects of the cooling device 1 according to the first embodiment will be described.

[0038] According to the cooling device 1 of the first embodiment, two or more twisted portions 13b are provided in the width direction and one or more twisted portions 13b are provided in the flow direction. This promotes agitation of the refrigerant in both the width direction and the flow direction. This promotes heat transfer in both the width direction and the flow direction. This improves cooling performance. Furthermore, the refrigerant is agitated along the twisted portions 13b while suppressing the generation of unnecessary vortices. This suppresses an increase in pressure loss.

[0039] In the cooling device 1 according to the first embodiment, the fins 13 have a streamlined twisted shape so that the cross-sectional area of ​​the flow path FP is constant in the flow direction when the fins 13 are disposed inside the flow path FP. This prevents changes in the flow velocity of the refrigerant and prevents flow separation, thereby preventing the generation of unnecessary vortices.

[0040] According to the cooling device 1 of the first embodiment, the height of the grooves 14 is the same as the thickness of the protrusions 13c. Therefore, the fins 13 can be fixed to the housing 11 with the protrusions 13c fitted in the grooves 14.

[0041] According to the cooling device 1 of the first embodiment, each of the twisted portions 13b has one end E1 in contact with the top plate 11t and the other end E2 in contact with the bottom plate 11b in the width direction, so that the fins 13 can be fixed to the housing 11 in the height direction.

[0042] According to the cooling device 1 of the first embodiment, the fins 13 have a cross-sectional shape that changes continuously from extending parallel to the width direction along the flow direction to tilting counterclockwise, passing through each of the twisted portions 13b, where the tilt direction reverses, tilts counterclockwise again, and returns to extending parallel to the width direction. This allows the refrigerant flowing around the fins 13 to swirl counterclockwise. This agitates the refrigerant, thereby promoting heat transfer.

[0043] According to the cooling device 1 of the first embodiment, the fins 13 have a cross-sectional shape that, along the flow direction, starts extending parallel to the width direction, tilts clockwise, reverses its tilt direction at each of the twisted portions 13b, tilts clockwise again, and continuously changes to a state extending parallel to the width direction. This allows the refrigerant flowing around the fins 13 to swirl in the clockwise direction. This agitates the refrigerant, thereby promoting heat transfer.

[0044] Embodiment 2 Unless otherwise specified, embodiment 2 has the same configuration, operation, and effect as above-described embodiment 1. Therefore, the same configuration as above-described embodiment 1 is given the same reference numeral, and description thereof will not be repeated.

[0045] The configuration of the fin 13 according to the second embodiment will be described with reference to Fig. 14. Fig. 14 is a perspective view of the fin 13 according to the second embodiment.

[0046] This embodiment differs from embodiment 1 in the shape of fins 13. Specifically, this embodiment differs from embodiment 1 in that the number of twisted portions 13b in the Y-axis direction of fins 13 is increased to three.

[0047] In this embodiment, three or more twisted portions 13b are provided in the width direction. In this embodiment, fin 13 is composed of three fin members lined up in the width direction. Two fin members are connected in the width direction. In FIG. 14, the number of twisted portions 13b is three, but the number of twisted portions 13b is not particularly limited, and may be increased as appropriate without departing from the spirit of the present disclosure.

[0048] Next, the effects of the second embodiment will be described.

[0049] According to the cooling device 1 of the second embodiment, three or more twisted portions 13b are provided in the width direction. This further enhances the effect of stirring the refrigerant compared to when two twisted portions 13b are provided in the width direction. This further enhances heat transfer.

[0050] Embodiment 3 Unless otherwise specified, the third embodiment has the same configuration, operation, and effect as the first embodiment. Therefore, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will not be repeated.

[0051] The configuration of the fin 13 according to the third embodiment will be described with reference to Fig. 15. Fig. 15 is a perspective view of the fin 13 according to the third embodiment.

[0052] The present embodiment differs from embodiment 1 in the shape of fins 13. Specifically, the present embodiment differs from embodiment 1 in that twisted portions 13b of fins 13 in the X-axis direction are shifted by a length (NP / 2) that is half the twist pitch (NP) and arranged in a staggered pattern.

[0053] In this embodiment, two or more twisted portions 13b are provided in the width direction, and each of the twisted portions 13b is offset from one another in the flow direction in a staggered manner. In Fig. 15, the offset in the X-axis direction when twisted portions 13b are arranged in a staggered manner is half the twist pitch, but this is not particularly limited and may be changed within the scope of the present disclosure.

[0054] Next, the effects of the third embodiment will be described.

[0055] According to the cooling device 1 of the third embodiment, two or more twisted portions 13b are provided in the width direction, and each of the twisted portions 13b is arranged in a staggered pattern in the flow direction, shifting from one another. This further enhances the effect of stirring the refrigerant compared to when the twisted portions 13b are arranged side by side in the width direction, thereby further enhancing heat transfer.

[0056] Embodiment 4 Unless otherwise specified, embodiment 4 has the same configuration, operation, and effect as embodiment 1. Therefore, the same components as embodiment 1 above are denoted by the same reference numerals, and description thereof will not be repeated.

[0057] The configuration of the fin 13 according to the fourth embodiment will be described with reference to Fig. 16 to Fig. 19. Fig. 16 is a perspective view of the fin 13. Fig. 17 is an end view taken along line XVII-XVII in Fig. 16. Fig. 18 is an end view taken along line XVIII-XVIII in Fig. 16. Fig. 19 is an end view taken along line XIX-XIX in Fig. 16.

[0058] This embodiment differs from embodiment 1 in the shape of fin 13. Specifically, this embodiment differs from embodiment 1 in that twisted portion 13b in the positive Y-axis direction is twisted counterclockwise, twisted portion 13b in the negative Y-axis direction is twisted clockwise, and the cross-sectional shape changes symmetrically with respect to center line CL of fin 13 in the width direction.

[0059] In this embodiment, two or more of the multiple twisted portions 13b provided in the width direction are twisted symmetrically with respect to each other in the width direction. The direction of twist of the fin 13 is not particularly limited, and the twisted portion 13b in the positive direction of the Y axis may be twisted clockwise, and the twisted portion 13b in the negative direction of the Y axis may be twisted counterclockwise.

[0060] Next, the effects of the fourth embodiment will be described.

[0061] According to cooling device 1 of embodiment 4, two or more of the multiple twisted portions 13b provided in the width direction are twisted symmetrically with respect to each other in the width direction. Therefore, multiple twisted portions 13b have cross-sectional shapes that are symmetrical in the width direction, and the refrigerant flows that swirl left and right merge at the center of fin 13 in the width direction. This further promotes heat transfer at the center of fin 13 in the width direction.

[0062] Furthermore, the above embodiments can be combined as appropriate.

[0063] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present disclosure is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims.

[0064] Various aspects of the present disclosure are summarized below as appendices.

[0065] (Appendix 1) a housing provided with a flow path extending in a width direction and a flow direction intersecting the width direction, and a groove recessed from the flow path in the width direction; a fin including a flat plate portion disposed inside the flow path of the housing, a plurality of twisted portions disposed inside the flow path and connected to the flat plate portion in the flow direction, and a protrusion protruding from the flat plate portion in the width direction, the protrusion of the fin is fitted into the groove of the housing, Each of the plurality of twisted portions is twisted along the flow direction, The cooling device, wherein the plurality of twisted portions are provided in two or more in the width direction and in one or more in the flow direction.

[0066] (Appendix 2) 2. The cooling device of claim 1, wherein the height of the groove is the same as the thickness of the protrusion.

[0067] (Appendix 3) The housing includes a top plate and a bottom plate, 3. The cooling device according to claim 1, wherein each of the plurality of twisted portions has one end in the width direction in contact with the top plate and the other end in contact with the bottom plate.

[0068] (Appendix 4) The cooling device according to any one of claims 1 to 3, wherein the fins have a cross-sectional shape that continuously changes from extending parallel to the width direction to tilting counterclockwise along the flow direction, reversing the tilt direction at each of the plurality of twisted portions, and then tilting counterclockwise again to extend parallel to the width direction.

[0069] (Appendix 5) The cooling device according to any one of claims 1 to 3, wherein the fins have a cross-sectional shape that continuously changes from extending parallel to the width direction to tilting clockwise along the flow direction, reversing the tilt direction at each of the plurality of twisted portions, and then tilting clockwise again to extend parallel to the width direction.

[0070] (Appendix 6) 6. The cooling device according to any one of claims 1 to 5, wherein the plurality of twisted portions are three or more in the width direction.

[0071] (Appendix 7) The cooling device according to any one of appendix 1 to 6, wherein two or more of the twisted portions provided in the width direction are arranged in a staggered pattern in the flow direction and shifted from each other.

[0072] (Appendix 8) The cooling device according to any one of appendixes 1 to 7, wherein two or more of the plurality of twisted portions provided in the width direction are twisted symmetrically to each other in the width direction. [Explanation of symbols]

[0073] 1 cooling device, 2 refrigerant drive device, 3 refrigerant, 11 housing, 11b bottom plate, 11t top plate, 12 element, 13 fin, 13a flat plate portion, 13b twisted portion, 13b twisted portion, 13c protrusion, 14 groove, E1 one end, E2 other end, FP flow path.

Claims

1. a housing provided with a flow path extending in a width direction and a flow direction intersecting the width direction, and a groove recessed from the flow path in the width direction; a fin including a flat plate portion disposed inside the flow path of the housing, a plurality of twisted portions disposed inside the flow path and connected to the flat plate portion in the flow direction, and a protrusion protruding from the flat plate portion in the width direction, the protrusion of the fin is fitted into the groove of the housing, Each of the plurality of twisted portions is twisted along the flow direction, The cooling device, wherein the plurality of twisted portions are provided in two or more in the width direction and in one or more in the flow direction.

2. The cooling device according to claim 1 , wherein the height of the groove is the same as the thickness of the protrusion.

3. The housing includes a top plate and a bottom plate, The cooling device according to claim 1 , wherein each of the plurality of twisted portions has one end in the width direction in contact with the top plate and the other end in contact with the bottom plate.

4. 2. The cooling device according to claim 1, wherein the fin has a cross-sectional shape that continuously changes from extending parallel to the width direction to tilting counterclockwise along the flow direction, passing through each of the plurality of twisted portions, where the tilt direction reverses, and then tilts counterclockwise again to return to extending parallel to the width direction.

5. 2. The cooling device according to claim 1, wherein the fins have a cross-sectional shape that continuously changes from extending parallel to the width direction to tilting clockwise along the flow direction, passing through each of the plurality of twisted portions, where the tilt direction reverses, and then tilts clockwise again to return to extending parallel to the width direction.

6. The cooling device according to claim 1 , wherein the number of the twisted portions provided in the width direction is three or more.

7. The cooling device according to claim 1 , wherein the two or more twisted portions provided in the width direction are arranged in a staggered pattern in the flow direction so as to be offset from each other.

8. The cooling device according to claim 1 , wherein each of the two or more twisted portions provided in the width direction is twisted symmetrically to one another in the width direction.

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