Cooling device

Abstract

To provide a cooling device that can suppress stress concentration at the connection point with the joint in the flow channel pipe. [Solution] An exemplary embodiment of the cooling device comprises a joint, a flow channel pipe, and a first cover member. The joint includes a joint body and a first projection. The joint body has an internal flow channel. The first projection protrudes from the joint body, has an internal flow channel, and is fluidly connected to the joint body. The flow channel pipe is connected to the first projection and is fluidly connected to the joint. The first cover member covers the outer circumferential surface of the connection between the first projection and the flow channel pipe.

Description

[Technical Field]

[0001] An exemplary embodiment relates to a cooling device. [Background Art]

[0002] There is a cooling device including a joint having an internal flow path through which a refrigerant flows, and a flow path pipe fluidly connected to the joint (see, for example, Patent Document 1). [Prior Art Literature] [Patent Literature]

[0003] [Patent Document 1] Japanese Unexamined Patent Publication No. 2023-029880 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] However, in a cooling device in which a refrigerant flow path pipe is fluidly connected to a joint, stress concentration at the connection portion between the flow path pipe and the joint may adversely affect the flow path pipe.

[0005] The exemplary embodiment has been made in view of the above, and an object thereof is to provide a cooling device capable of suppressing stress concentration at a connection portion between a flow path pipe and a joint. [Means for Solving the Problem]

[0006] A cooling device according to an exemplary embodiment includes a joint, a flow path pipe, and a first cover member. The joint includes a joint body and a first protruding portion. The joint body has an internal flow path. The first protruding portion protrudes from the joint body, has an internal flow path, and is fluidly connected to the joint body. The flow path pipe is connected to the first protruding portion and is fluidly connected to the joint. The first cover member covers an outer peripheral surface of a connection portion between the first protruding portion and the flow path pipe. [Effect of the Invention]

[0007] In the cooling device according to an exemplary embodiment, the connection between the first protrusion of the joint and the flow channel pipe is covered by the first cover member, so that the first cover member can suppress the concentration of stress at the connection between the flow channel pipe and the joint. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is an explanatory diagram showing a cooling device according to an exemplary embodiment. [Figure 2] Figure 2 is an explanatory diagram showing an example of a connection between a joint and a flow channel pipe according to an exemplary embodiment. [Figure 3] Figure 3 is an explanatory diagram showing a first modified example of the connection between the joint and the flow channel pipe according to an exemplary embodiment. [Figure 4] Figure 4 is an explanatory diagram showing a second modified example of the connection between the joint and the flow channel pipe according to an exemplary embodiment. [Figure 5] Figure 5 is an explanatory diagram showing a third modified example of the connection between the joint and the flow channel pipe according to an exemplary embodiment. [Figure 6] Figure 6 is an explanatory diagram showing an example of a connection between a joint and a cooler according to an exemplary embodiment. [Figure 7] Figure 7 is an explanatory diagram showing an example of a fastening portion between a cooling device and a bracket according to an exemplary embodiment. [Figure 8] Figure 8 is an explanatory diagram showing an example of a fastening portion between the cooling device and the object to be cooled in an exemplary embodiment of the cooling device. [Figure 9] Figure 9 is an explanatory diagram of a cold plate according to an exemplary embodiment. [Modes for carrying out the invention]

[0009] Hereinafter, exemplary embodiments of the cooling device will be described in detail with reference to the attached drawings. However, this invention is not limited to the embodiments described below. Furthermore, in the following description, the same reference numerals are used for the same components to omit redundant explanations.

[0010] Figure 1 is an explanatory diagram showing a cooling device 2 according to an exemplary embodiment. The cooling device 2 is a device attached to a cooling target that is a heat source and cools the cooling target. As shown in Figure 1, the cooling device 2 comprises a plurality (in this case, 4) coolers 3 (31-34) and a plurality (in this case, 11) joints 4 (40-50) that are fluidly connected to the coolers 3 (31-34). Furthermore, the cooling device 2 comprises flow path pipes 5 (51-57) that are fluidly connected to the joints 4 (40-50).

[0011] In the following explanation, any one of the multiple coolers 31-34 will be referred to as cooler 3. Similarly, any one of the multiple joints 40-50 will be referred to as joint 4. And any one of the multiple flow channels 5 (51-57) will be referred to as flow channel 5.

[0012] The flow channels 51 and 55 are fluidly connected to a refrigerant circulation device (not shown). Each cooler 3 has an internal flow channel through which the refrigerant flows. The refrigerant cooled by the refrigerant circulation device is supplied to joints 40 and 47 through the flow channel 51.

[0013] The refrigerant supplied to joint 40 passes through flow path pipe 52 and is supplied from joint 41 to the internal flow path of cooler 31. The refrigerant cools the object being cooled by absorbing heat from the object as it passes through the internal flow path of cooler 31.

[0014] The refrigerant that has passed through the internal flow path of the cooler 31 is supplied to the internal flow path of the cooler 32 by passing through joint 42, flow path pipe 53, and joint 43 in that order. The refrigerant cools the object to be cooled by absorbing heat from the object as it passes through the internal flow path of the cooler 32.

[0015] The refrigerant having passed through the internal flow path of the cooler 32 passes through the joint 44, the flow path pipe 54, and the joint 45 in this order, and is supplied to the internal flow path of the cooler 34. The refrigerant cools the object to be cooled by absorbing heat from the object to be cooled while passing through the internal flow path of the cooler 34. The refrigerant having passed through the interior of the cooler 34 passes through the joint 46 and is delivered from the flow path pipe 55 to the refrigerant circulation device. The refrigerant delivered to the refrigerant circulation device is cooled by a heat exchanger inside the refrigerant circulation device, and is supplied again to the cooling device 2 via the flow path pipe 51.

[0016] Further, the refrigerant supplied to the joint 47 passes through the flow path pipe 56, and is supplied from the joint 48 to the internal flow path of the cooler 33. The refrigerant cools the object to be cooled by absorbing heat from the object to be cooled while passing through the internal flow path of the cooler 33.

[0017] The refrigerant having passed through the internal flow path of the cooler 33 passes through the joint 49, the flow path pipe 57, and the joint 50 in this order, and is supplied to the internal flow path of the cooler 32. The refrigerant cools the object to be cooled by absorbing heat from the object to be cooled while passing through the internal flow path of the cooler 32.

[0018] The refrigerant having passed through the internal flow path of the cooler 32 passes through the joint 44, the flow path pipe 54, and the joint 45 in this order, and is supplied to the internal flow path of the cooler 34. The refrigerant cools the object to be cooled by absorbing heat from the object to be cooled while passing through the internal flow path of the cooler 34. The refrigerant having passed through the interior of the cooler 34 passes through the joint 46 and is delivered from the flow path pipe 55 to the refrigerant circulation device. The refrigerant delivered to the refrigerant circulation device is cooled by a heat exchanger inside the refrigerant circulation device, and is supplied again to the cooling device 2 via the flow path pipe 51.

[0019] The cooling device 2 is provided with a bracket (not shown) serving as a support substrate that fixes the relative positions of the four coolers 31 to 34. The bracket is fixed by screwing at a location such as the fixing portion of the cooling device 2 indicated by the dashed elliptical frame A in Fig. 1, for example. The structure of the fixing portion of the cooling device 2 indicated by the dashed elliptical frame A will be described later with reference to Fig. 7.

[0020] Further, the cooling device 2 is fixed to an object to be cooled by screwing at a position such as the fixing portion shown by the dashed elliptical frame B in FIG. 1. The structure of the fixing portion shown by the dashed elliptical frame B in FIG. 1 will be described later with reference to FIG. 8.

[0021] In such a cooling device 2, stress concentration at the connection between the flow channel pipe 5 and the joint 4 may cause adverse effects on the flow channel pipe 5, such as damage at the stress-concentrated position. Therefore, the cooling device 2 is provided with a configuration that suppresses stress concentration at the connection between the flow channel pipe 5 and the joint 4.

[0022] FIG. 2 is an explanatory view showing an example of the connection between the joint 4 and the flow channel pipe 5 according to an exemplary embodiment. As shown in FIG. 2, the joint 4 includes a joint body 61 and a first protrusion 62. The joint body 61 has an internal flow channel and is in fluid communication with the cooler 3.

[0023] The first protrusion 62 protrudes from the joint body 61, has an internal flow channel, and is in fluid communication with the joint body 61. In one example, the first protrusion 62 has a cylindrical shape. The flow channel pipe 5 is connected to the first protrusion 62 and is in fluid communication with the joint 4.

[0024] When the protruding direction of the first protrusion 62 from the joint body 61 is defined as the first protruding direction, the flow channel pipe 5 is connected to the first protrusion 62 from the first protruding direction. This facilitates the connection work between the first protrusion 62 and the flow channel pipe 5. In one example, the flow channel pipe 5 may be brazed to the first protrusion 62 while covering the outer peripheral surface of the first protrusion 62. That is, the flow channel pipe 5 may be brazed to the first protrusion 62 in a state where the first protrusion 62 is inserted into the flow channel pipe 5. In another example, the flow channel pipe 5 may be brazed to the first protrusion 62 in a state where the outer peripheral surface of the flow channel pipe 5 is covered by the first protrusion 62. That is, the first protrusion 62 may be brazed to the flow channel pipe 5 in a state where the flow channel pipe 5 is inserted into the first protrusion 62.

[0025] In one example, the flow channel pipe 5 is made of metal. Therefore, the flow channel pipe 5 is stronger than pipes made of resin or rubber. Furthermore, in one example, the flow channel pipe 5 is a bellows pipe. Therefore, the flow channel pipe 5 has improved flexibility in piping and the stress on the flow channel pipe 5 can be distributed by bending.

[0026] In the example shown in Figure 2, the flow channel pipe 5 is connected to the first protrusion 62 without bending from the first protrusion direction, but it may also be connected to the first protrusion 62 with the connection point bent. Furthermore, the flow channel pipe 5 may be bent by applying stress after being connected to the first protrusion 62 in a straight shape. Also, in the example shown in Figure 2, the first protrusion 62 protrudes linearly from the joint body 61, but it may protrude from the joint body 61 in a bent state.

[0027] The cooling device 2 is equipped with a first cover member 71 at the connection point between the joint 4 and the flow channel pipe 5. The first cover member 71 covers the outer circumferential surface of the connection point between the first protrusion 62 and the flow channel pipe 5. Here, the first cover member 71 is in contact with both the outer circumferential surface of the first protrusion 62 and the outer circumferential surface of the flow channel pipe 5. By suppressing the bending and movement of the flow channel pipe 5 relative to the joint 4 with the first cover member 71, it is possible to suppress the concentration of stress at the connection point between the flow channel pipe 5 and the joint 4. In addition, the first cover member 71 can also suppress the concentration of stress at the connection point between the flow channel pipe 5 and the joint 4 by absorbing the stress acting on the connection point between the flow channel pipe 5 and the joint 4.

[0028] In one example, the first cover member 71 has lower rigidity than the joint body 61 but higher rigidity than the flow channel pipe 5. For example, the Young's modulus of the first cover member 71 is smaller than that of the joint body 61 but larger than that of the flow channel pipe 5. As a result, the first cover member 71 can alleviate the limitations on the range of motion of the flow channel pipe 5 while suppressing damage to the flow channel pipe 5 due to excessive bending. Here, because the first cover member 71 has higher rigidity than the flow channel pipe 5 and less deflection as a tubular member, it can suppress damage to the flow channel pipe 5 due to excessive bending. In addition, because the first cover member 71 has lower rigidity than the joint body 61, the limitations on the range of motion of the flow channel pipe 5 are alleviated, improving the workability of routing the flow channel pipe 5.

[0029] Furthermore, the end of the first cover member 71 on the joint 4 side is in contact with the joint body 61. This allows the first cover member 71 to increase the area it can protect by covering.

[0030] In one example, the first cover member 71 is a heat-shrinkable sheet or tube-shaped member. Therefore, after being attached to the connection between the joint 4 and the flow path pipe 5, the first cover member 71 is heated and adheres tightly to the outer surface of the first protrusion 62 and the outer surface of the end of the flow path pipe 5 on the joint 4 side. As a result, the first cover member 71 can suppress misalignment between the first protrusion 62 and the flow path pipe 5, and can also suppress refrigerant leakage from the connection between the joint 4 and the flow path pipe 5.

[0031] Note that the configuration of the connection shown in Figure 2 is just one example, and various modifications are possible. Next, a first modified example of the connection between the joint 4 and the flow channel pipe 5 will be described with reference to Figure 3. Figure 3 is an explanatory diagram showing a first modified example of the connection between the joint 4 and the flow channel pipe 5 according to an exemplary embodiment.

[0032] As shown in Figure 3, the connection between the joint 4 and the flow channel pipe 5 in the first modified example differs from the connection shown in Figure 2 in that it includes a second cover member 72 that covers the outer surface of the flow channel pipe 5, while the other configurations are the same as those of the connection shown in Figure 2. As a result, the outer surface of the flow channel pipe 5 is protected by the second cover member 72, thus suppressing damage not only to the connection with the first protrusion 62 but also to the entire flow channel pipe 5.

[0033] In one example, the second cover member 72 has lower rigidity than the first cover member 71 but higher rigidity than the flow channel pipe 5. For example, the Young's modulus of the second cover member 72 is smaller than that of the first cover member 71 but larger than that of the flow channel pipe 5. As a result, the first cover member 71 can alleviate the limitations on the range of motion of the flow channel pipe 5 while suppressing damage to the flow channel pipe 5 due to excessive bending. Here, the second cover member 72 has higher rigidity than the flow channel pipe 5 and less deflection as a tubular member, which helps to suppress damage to the flow channel pipe 5 due to excessive bending. In addition, because the second cover member 72 has lower rigidity than the first cover member 71, the limitations on the range of motion of the flow channel pipe 5 are alleviated, improving the workability of routing the flow channel pipe 5. Furthermore, the second cover member 72 not only covers the connection point with the joint 4 but also covers the entire flow channel pipe 5, thereby preventing damage to the surface of the flow channel pipe 5. In addition, even though the second cover member 72 covers the entire flow channel pipe 5, it has lower rigidity than other members, making it less likely to reduce workability.

[0034] Furthermore, the outer circumferential surface of the end of the second cover member 72 on the joint 4 side is covered by the first cover member 71. As mentioned above, the first cover member 71 is, in one example, a heat-shrinkable sheet-like or tubular member, and therefore, after covering the second cover member 72, it is heated and adheres tightly to the second cover member 72. This suppresses displacement of the second cover member 72.

[0035] Next, a second modified example of the connection between the joint 4 and the flow channel pipe 5 will be described with reference to Figure 4. Figure 4 is an explanatory diagram showing a second modified example of the connection between the joint 4 and the flow channel pipe 5 according to an exemplary embodiment.

[0036] As shown in Figure 4, the connection part according to the second modified example differs from the connection part shown in Figure 2 in that the end of the flow channel pipe 5 on the joint 4 side is in contact with the joint body 61, but the other configurations are the same as the connection part shown in Figure 2. As a result, the contact area of ​​the flow channel pipe 5 with the joint 4 is increased, and the fixing strength to the joint 4 is improved.

[0037] Next, a third modified example of the connection between the joint 4 and the flow channel pipe 5 will be described with reference to Figure 5. Figure 5 is an explanatory diagram showing a third modified example of the connection between the joint 4 and the flow channel pipe 5 according to an exemplary embodiment.

[0038] As shown in Figure 5, the first projection 62A according to the third modified example comprises a cylindrical base portion 63A and a cylindrical tip portion 63B. The base portion 63A protrudes from the joint body 61 in the first projection direction. The tip portion 63B protrudes from at least a part of the base portion in the first projection direction and has a smaller diameter than the diameter of the base portion 63A.

[0039] The first projection direction here is the direction from the base end of the first projection 62A, which is connected to the joint body 61, toward the tip. The flow channel pipe 5 is fluidly connected to the tip portion 63B of the first projection 62A.

[0040] In the example shown in Figure 5, the base portion 63A and the tip portion 63B are arranged concentrically with the first projection portion 62 when viewed from the axial direction of the internal flow path. In the example shown in Figure 5, the components are arranged linearly in the direction of the first projection, but at least one of the base portion 63A and the tip portion 32B may be bent.

[0041] Furthermore, the first cover member 71 according to the third modified example covers the outer circumferential surface of the base portion 63A. At this time, a gap is formed between the first cover member 71 and the end of the flow channel pipe 5 on the joint 4 side. This makes it possible to suppress contact between the first cover member 71 and the end of the flow channel pipe 5 on the joint 4 side.

[0042] Furthermore, the end of the flow channel pipe 5 on the joint 4 side is in contact with the base portion 63A. This increases the contact area between the flow channel pipe 5 and the first protrusion 62A, and the contact area is further increased by contact with the base portion 63A, thereby improving the fixing strength of the flow channel pipe 5. In addition, by suppressing contact with metal processing marks, damage to the first cover member 71 can be suppressed.

[0043] Furthermore, the first cover member 71 and the second cover member 72 are made of insulating material. This adds insulation to the flow channel pipe 5, which is made of metal material, thus preventing unexpected short circuits through the flow channel pipe 5.

[0044] Next, the configuration of the connection between the joint 4 and the cooler 3 according to an exemplary embodiment will be described with reference to Figure 6. Figure 6 is an explanatory diagram showing an example of the connection between the joint 4 and the cooler 3 according to an exemplary embodiment. In Figure 6, the insertion direction of the joint 4 into the cooler 3 is indicated by a thick straight arrow.

[0045] As shown in Figure 6, the joint 4 includes an insertion portion 60 that is inserted into an opening 34A which serves as the inlet or outlet for the refrigerant in the cooler 3. The insertion portion 60 is inserted into the opening 34A and, in one example, is brazed to the opening 34A to connect to the cooler 3.

[0046] The contact surface between the insertion portion 60 and the opening 34A includes a first surface 64 parallel to a plane whose normality is the insertion direction of the insertion portion 60 (see thick straight arrow), and a cylindrical second surface 65 extending from the outer circumference of the first surface 64 toward the joint body 61 in a direction parallel to the insertion direction of the insertion portion 60. In other words, the contact surface between the insertion portion 60 and the opening 34A is stepped.

[0047] As a result, the joint 4 offers improved fixing strength when brazing the insertion portion 60 and the opening 34A, compared to, for example, a case where the contact surface between the insertion portion 60 and the opening 34A is a simple cylindrical surface. Furthermore, the joint 4 facilitates positioning operations with respect to the cooler 3.

[0048] Furthermore, the contact surface between the insertion portion 60 and the opening 34A further includes a third surface 66 and a fourth surface 67. The third surface 66 extends radially outward from the end of the second surface 65 on the joint body 61 side and is a plane parallel to the plane whose normality is the insertion direction of the insertion portion 60. The fourth surface 67 extends from at least a portion of the third surface 66 toward the joint body 61 side in a direction parallel to the insertion direction of the insertion portion 60.

[0049] In other words, the contact surface between the insertion portion 60 and the opening 34A is partially stepped. This further increases the contact area when brazing the insertion portion 60 and the opening 34A of the joint 4, thus further improving the bonding strength. In Figure 6, the joint 4 shows the joint body 61 bent in an L-shape from the insertion direction of the flow channel pipe 5 toward the insertion portion 60 in a side view, but the joint body 61 does not have to be bent. In other words, the joint body 61 may be shaped so that the insertion direction of the flow channel pipe 5 and the insertion direction of the insertion portion 60 are aligned in a straight line.

[0050] Next, with reference to Figure 7, the structure of the fastening portion between the cooling device 2 and the bracket 8 according to an exemplary embodiment will be described. Figure 7 is an explanatory diagram showing an example of the fastening portion between the cooling device 2 and the bracket 8 according to an exemplary embodiment. Figure 7 shows the portion of the cooling device 2 within the dashed ellipse A shown in Figure 1.

[0051] As shown in Figure 7, the bracket 8 is fixed to the cooling device 2 by screws 12. The bracket 8 comprises a plate portion 81 in which screw holes 11 into which the screws 12 are screwed, a rising portion 82 rising from one end of the plate portion 81 in the direction normal to the plate portion 81, and a flat portion 83 extending from the end of the rising portion 82 opposite to the plate portion 81 in a direction parallel to the main surface of the plate portion 81.

[0052] On the other hand, the cooling device 2 is provided with a planar contact portion 35 that abuts against the plate portion 81 of the bracket 8. The contact portion 35 has a screw hole into which a screw 12 is screwed. Furthermore, the cooling device 2 is provided with a wall portion 36 that extends from the contact portion 35 in a direction parallel to the rising direction of the rising portion 82 in the area around the plate portion 81 of the bracket 8 that abuts against the contact portion 35, excluding the portion where the rising portion 82 is provided and the portion that forms the outer circumference of the cooling device 2. In this way, since there is no wall portion 36 near the rising portion 82, the contact area between the plate portion 81 and the contact portion 35 can be increased, thereby improving the fixing strength of the cooling device 2 to the bracket 8.

[0053] Multiple fastening points similar in structure to that shown in Figure 7 are provided on the cooling device 2 and the bracket 8. This increases the contact area between the bracket 8 and the cooling device 2, thereby suppressing looseness after the bracket 8 and the cooling device 2 are fixed together with screws 12. In addition, the plate portion 81 of the bracket 8 and the fixing screws 12 are enclosed in space by the contact portion 35 and wall portion 36 of the cooling device 2, thereby suppressing interference of the screw heads with other components.

[0054] Next, with reference to Figure 8, the structure of the fastening portion between the cooling device 2 and the object to be cooled will be described. Figure 8 is an explanatory diagram showing an example of the fastening portion between the cooling device 2 and the object to be cooled in an exemplary embodiment. Figure 8 shows the back surface of the portion of the cooling device 2 within the dashed ellipse frame B shown in Figure 1.

[0055] As shown in Figure 8, the cooling device 2 has a circular, thin-walled portion 37 in plan view, with screw holes 13 formed on its periphery. The screw holes 13 are located in the center of the thin-walled portion 37. On the cooling object to which the cooling device 2 is attached, screw holes are provided at positions corresponding to the positions of the screw holes 13.

[0056] The cooling device 2 is fixed to the object to be cooled by screwing a screw into the screw hole 13, with the screw hole 13 aligned with the screw hole of the object to be cooled. The cooling device 2 is provided with fastening parts at multiple locations, having a structure similar to that shown in Figure 8.

[0057] Furthermore, the cooling device 2 includes a wall portion 39 extending in the thickness direction of the thin-walled portion 37 from the outer peripheral portion of the circular outer periphery in a plan view of the thin-walled portion 37, excluding the portion that forms the outer periphery of the cooling device 2, which is at least longer than a semicircle. In addition, the cooling device 2 includes a thick portion 38 extending in the radial direction of the thin-walled portion 37 from the end of the wall portion 39 opposite to the thin-walled portion 37.

[0058] Thus, the cooling device 2 includes a thickened portion 38 that surrounds at least the outer circumference of the thin-walled portion 37 that is longer than a semicircle in a plan view, and the thickened portion 38 has pointed projections 14 along the outer circumference of the thin-walled portion 37 which is circular in a plan view. As a result, the cooling device 2 has improved mechanical strength around the screw hole 13.

[0059] Furthermore, since the thickened portion 38 is not provided on the outer circumference of the cooling device 2, the screw holes 13 can be positioned as close as possible to the peripheral edge of the cooling device 2. This allows the cooling device 2 to be fixed to the object to be cooled at multiple positions as close as possible to the peripheral edge of the cooling device 2, thereby improving the stability of the position of the cooling device 2 relative to the object to be cooled.

[0060] Next, with reference to Figure 9, a cold plate 9 according to an exemplary embodiment will be described. Figure 9 is an explanatory diagram of a cold plate 9 according to an exemplary embodiment. The cold plate 9 is provided in each cooler 3 and constitutes a part of the internal flow of the refrigerant in the cooler 3. Figure 9 shows the side of the cold plate 9 that faces the internal flow path of the cooler 3.

[0061] As shown in Figure 9, the cold plate 9 is a rectangular plate-shaped member in plan view. In one example, the cold plate 9 is made of a material with high thermal conductivity, such as copper. The cold plate 9 has a wall portion 91 arranged in a frame-like manner at its periphery in plan view. In the cold plate 9, the inner region enclosed by the wall portion 91 becomes the internal flow path for the refrigerant.

[0062] The cold plate 9 has a plurality of fins 92 arranged on the side facing the internal flow path of the refrigerant. The plurality of fins 92 extending in the first direction are arranged in a direction perpendicular to the first direction. The cold plate 9 also has gaps 94 through which the refrigerant flows in the wall portions 91 facing both ends of each fin 92. The gaps 94 extend in the second direction, which is the direction in which the fins 92 are arranged. In addition, a flat plate-shaped cover portion 95 is arranged above the fins 92 to define the flow path of the refrigerant. The cover portion 95 has a window portion in the center that does not cover the top of the fins 92. In one example, the window portion is rectangular in shape with the second direction as the longitudinal direction and the first direction as the transverse direction.

[0063] Figure 9 shows the direction of refrigerant flow with thick straight arrows. The refrigerant supplied to the internal flow path of the cooler 3 flows in from one end of the second direction in the cold plate 9, flows toward the other end of the second direction, and also flows through the flow path 93 between each fin 92 toward the gap 94 formed in the wall portion 91. After that, the refrigerant flows inside the gap 94 from one end of the second direction toward the other end and flows out to the outside of the cooler 3.

[0064] If the gap 94 is not provided, the refrigerant will flow in from one end of the second direction in the cold plate 9, then flow towards the other end of the second direction, overcoming the fins 92 located below the window portion not covered by the lid portion 95. In this case, the flow resistance of the refrigerant will increase.

[0065] In contrast, the cold plate 9 has gaps 94 in the wall portions 91 facing both ends of each fin 92, so that the refrigerant can flow from the flow path 93 between each fin 92 through the gaps 94 toward the other end in the second direction. This allows the cold plate 9 to reduce flow resistance. At this time, some of the refrigerant can also flow through the upper region of the fins 92 below the window portion that is not covered by the lid portion 95.

[0066] With regard to embodiments including Examples 1 to n described above, the following additional information is disclosed. (1) A joint body having an internal flow path, A first protruding portion that protrudes from the joint body, has an internal flow path, and is fluidly connected to the joint body. A joint including, A flow channel pipe connected to the first protrusion and fluidly connected to the joint, A first cover member covers the outer circumferential surface of the connection portion between the first protrusion and the flow channel pipe. A cooling device equipped with the following features. (2) The cooling device according to (1), wherein the first cover member has lower rigidity than the first protrusion and higher rigidity than the flow channel tube. (3) The cooling device according to (1) or (2) above, wherein the flow channel is a metal bellows tube. (4) The cooling device according to any one of (1) to (3), wherein the end of the first cover member on the joint side is in contact with the joint body. (5) The flow channel pipe is provided with a second cover member that covers the outer surface of the flow channel pipe, The cooling device according to any one of (1) to (4), wherein the second cover member has lower rigidity than the first cover member and higher rigidity than the flow channel tube. (6) The cooling device according to (5), wherein the outer circumferential surface of the end of the second cover member on the joint side is covered by the first cover member. (7) The cooling device according to any one of (1) to (6), wherein the flow channel pipe has an end on the joint side in contact with the joint body. (8) The first projection comprises a cylindrical base portion that protrudes from the joint body and a cylindrical tip portion that protrudes from at least a part of the base portion and has a smaller diameter than the base portion. The first cover member covers the outer circumferential surface of the base portion, and is a cooling device according to any one of (1) to (7) above. (9) The cooling device according to (8), wherein the flow channel pipe has an end on the joint side in contact with the base portion. (10) The first cover member and the second cover member are made of an insulating material. The cooling device described in (5) or (6) above. (11) The first projection protrudes from the joint body in the first projection direction, The flow channel pipe is connected to the first protruding portion from the first protruding direction. A cooling device as described in any one of (1) to (10) above. (12) The joint includes an insertion portion that protrudes from the joint body and is inserted into the opening of the cooler to provide fluid connection to the cooler. The contact surface between the insertion portion and the opening includes a first surface parallel to a plane whose normality is the insertion direction of the insertion portion, and a cylindrical second surface extending from the outer periphery of the first surface toward the joint body in a direction parallel to the insertion direction. A cooling device as described in any one of (1) to (11) above. (13) The contact surface between the insertion portion and the opening is A third surface extends radially outward from the end of the joint body on the second surface and is parallel to a plane whose normality is the insertion direction, The third surface further includes a fourth surface extending from at least a portion of the third surface toward the joint body in a direction parallel to the insertion direction, The cooling device described in (12) above.

[0067] Further effects and modifications can be readily derived by those skilled in the art. Therefore, broader aspects of the present invention are not limited to the specific details and representative embodiments expressed and described above. Accordingly, various modifications are possible without departing from the spirit or scope of the overall concept of the invention as defined by the appended claims and their equivalents. [Explanation of Symbols]

[0068] 2 Cooling device 3,31,32,33,34 Cooler 8 brackets 9 Cold Plate 11 screw holes 12 screws 13 screw holes 14 Protrusion 34A opening 35 Contact part 36 Wall 37 Thin-walled section 38 Thick part 39 Wall 4.40~50 joints 5,51~57 Flow channel 60 Insertion part 61 Joint body 62 1st protrusion 71 First cover member 72 Second cover member 81 Board part 82 Upright section 83 Plane part 91 Wall section 92 fins 93 Channels 94 gaps 95 Lid

Claims

1. A joint body having an internal flow path, A first protruding portion that protrudes from the joint body, has an internal flow path, and is fluidly connected to the joint body. A joint including, A flow channel pipe connected to the first protrusion and fluidly connected to the joint, A first cover member covers the outer circumferential surface of the connection portion between the first protrusion and the flow channel pipe. A cooling device equipped with the following features.

2. The cooling device according to claim 1, wherein the first cover member has lower rigidity than the first protrusion and higher rigidity than the flow channel tube.

3. The cooling device according to claim 1, wherein the flow channel is a metal bellows tube.

4. The cooling device according to claim 1, wherein the end of the first cover member on the joint side is in contact with the joint body.

5. The flow channel pipe is provided with a second cover member that covers the outer surface of the flow channel pipe, The cooling device according to claim 1, wherein the second cover member has lower rigidity than the first cover member and higher rigidity than the flow channel pipe.

6. The cooling device according to claim 5, wherein the outer circumferential surface of the end of the second cover member on the joint side is covered by the first cover member.

7. The cooling device according to claim 1, wherein the end of the flow channel pipe on the joint side is in contact with the joint body.

8. The first protruding portion comprises a cylindrical base portion that protrudes from the joint body and a cylindrical tip portion that protrudes from at least a part of the base portion and has a smaller diameter than the base portion. The cooling device according to claim 1, wherein the first cover member covers the outer circumferential surface of the base portion.

9. The cooling device according to claim 8, wherein the end of the flow channel pipe on the joint side is in contact with the base portion.

10. The first cover member and the second cover member are made of an insulating material. The cooling device according to claim 5.

11. The first projection protrudes from the joint body in the first projection direction, The flow channel pipe is connected to the first protruding portion from the first protruding direction. The cooling device according to claim 1.

12. The joint includes an insertion portion that protrudes from the joint body and is inserted into the opening of the cooler to provide fluid connection to the cooler. The contact surface between the insertion portion and the opening includes a first surface parallel to a plane whose normality is the insertion direction of the insertion portion, and a cylindrical second surface extending from the outer periphery of the first surface toward the joint body in a direction parallel to the insertion direction. The cooling device according to claim 1.

13. The contact surface between the insertion portion and the opening is A third surface extends radially outward from the end of the joint body on the second surface and is parallel to a plane whose normality is the insertion direction, The third surface further includes a fourth surface extending from at least a portion of the third surface toward the joint body in a direction parallel to the insertion direction, The cooling device according to claim 12.

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