Electrical component cooling structure

Abstract

To provide an electrical component cooling structure which can prevent a refrigerant from entering a housing while improving cooling performance of an electric component and preferably discharge the refrigerant which has entered the housing to the outside of the housing.SOLUTION: An electrical component cooling structure 1 includes: a housing case for housing a capacitor 30 that produces heat while energized; and a housing attached with the housing case. A bottom wall part 11 of the housing includes: a refrigerant circulation part 14 recessed outward of the housing from the bottom wall part 11; and a hole portion 11a for discharging a refrigerant 4 that has entered the housing. A bottom wall part 61 of the housing case includes: an annular convex part 61a fitted in the refrigerant circulation part 14; a refrigerant discharge groove part 61b communicating with the hole portion 11a outside of the annular convex part 61a; and a fixing part fixed to a housing 10 outside of the refrigerant discharge groove part 61b. An inner peripheral surface of the refrigerant circulation part 14 is formed with a first groove part 60b for housing a first sealing member 20A.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present invention relates to a structure for cooling an electrical component using a refrigerant. [Background technology]

[0002] Patent Document 1 describes a power converter including a main circuit case that houses a main circuit unit and a capacitor case that houses a capacitor element. The main circuit case includes a base plate to which the main circuit unit is attached and a cover that covers the main circuit unit, and the capacitor case is attached to the surface of the base plate opposite the main circuit unit so as to close the opening of the capacitor case. In addition, a refrigerant flow path is formed inside the base plate through which a refrigerant that cools the main circuit unit flows. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6236904 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-described structure, the refrigerant flow path is primarily intended to cool the main circuit. To improve the cooling performance of the capacitor element, it is conceivable to house the capacitor case within the main circuit case and combine the walls of the main circuit case and the capacitor case to form a refrigerant flow path between these walls. However, this configuration presents a risk of refrigerant entering the main circuit case through gaps in the walls.

[0005] The present invention has been made in consideration of the above points, and its object is to provide an electrical component cooling structure that improves the cooling performance of electrical components while preventing refrigerant from entering the housing, and that can suitably discharge refrigerant that has entered the housing outside the housing. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the electrical component cooling structure of the present invention includes an electrical component that generates heat when energized, a housing case in which the electrical component is housed, The storage case is stored therein. a housing to which a storage case is attached, one wall of the housing is recessed from the one wall to the outside of the housing and includes a refrigerant flow section through which a refrigerant flows, and a hole section for discharging the refrigerant that has entered the housing, the one wall section of the storage case includes an annular protrusion fitted into the refrigerant flow section, a refrigerant discharge groove section formed outside the annular protrusion so as to communicate with the hole section, and a fixing section fixed to the housing outside the refrigerant discharge groove section, the refrigerant flow section, the annular convex section, and a portion of one wall section of the accommodating case that is surrounded by the annular convex section constitute a refrigerant flow path through which the refrigerant flows, and the portion of one wall section of the housing that is surrounded by the refrigerant discharge groove section constitutes a refrigerant discharge path that discharges the refrigerant that has leaked from the refrigerant flow path to the outside of the housing via the hole section, A first groove portion is formed on at least one of the inner surface of the refrigerant flow portion and the outer surface of the annular convex portion, and a first sealing member that seals the space between the refrigerant flow portion and the annular convex portion is accommodated therein. [Effects of the Invention]

[0007] According to the present invention, it is possible to prevent the refrigerant from entering the housing while improving the cooling performance of the electrical components, and to suitably discharge the refrigerant that has entered the housing to the outside of the housing. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view schematically showing a booster to which an electrical component cooling structure according to an embodiment of the present invention is applied; [Figure 2] 1 is a perspective view schematically showing a capacitor unit according to an embodiment of the present invention; [Figure 3] FIG. 1 is a plan view schematically showing a capacitor unit according to an embodiment of the present invention. [Figure 4] 1 is a side view schematically showing a capacitor unit according to an embodiment of the present invention. [Figure 5] FIG. 2 is a bottom view schematically showing the capacitor unit according to the embodiment of the present invention. [Figure 6]1 is a perspective view schematically illustrating an assembly of a capacitor, a holding member, and a bus bar according to an embodiment of the present invention. [Figure 7] 1 is a perspective view schematically showing a storage case according to an embodiment of the present invention; [Figure 8] 1 is a front view schematically showing a storage case according to an embodiment of the present invention; [Figure 9] FIG. 2 is a perspective view schematically illustrating a state in which a resin portion is removed from the capacitor unit according to the embodiment of the present invention. [Figure 10] FIG. 2 is a front view schematically showing a state in which a resin portion is removed from the capacitor unit according to the embodiment of the present invention. [Figure 11] 1, and is a cross-sectional view taken along line XI-XI in FIG. 1, and is a cross-sectional view schematically showing the electrical component cooling structure according to the embodiment of the present invention. [Figure 12] FIG. 12 is a partially enlarged view of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Next, an embodiment of the present invention will be described in detail with reference to the drawings, taking as an example a case where the electrical component cooling structure of the present invention is used to cool electrical components constituting a voltage control unit (VCU) in a vehicle. Examples of vehicles to which the electrical component cooling structure of the present invention can be applied include electric vehicles (electric automobiles, etc.) powered by a motor. Examples of electrical components include capacitors.

[0010] In the following description, the up-down direction is based on the state in which the booster is installed in a vehicle. Furthermore, the front-rear and left-right directions, which are directions perpendicular to the up-down direction, are based on the housing case in which the capacitor is housed, and the front-rear direction is the depth direction of the housing case, and the left-right direction is the width direction of the housing case. In other words, the front-rear and left-right directions used in this embodiment do not necessarily coincide with the front-rear and left-right directions of the vehicle.

[0011] As shown in FIG. 1, an electrical component cooling structure 1 according to an embodiment of the present invention is a structure for cooling a capacitor 30 (see FIG. 6) as an electrical component constituting the circuit of a booster 2 mounted on a vehicle. In FIG. 1, electrical components (electrical component units) other than a capacitor unit 3 are not shown. The booster 2 is disposed between the vehicle's battery and motor, and boosts the battery voltage to a voltage required by the motor and supplies the boosted battery power to the motor. The booster 2 to which the electrical component cooling structure 1 is applied includes a housing 10, a first sealing member 20A (see FIG. 5), a second sealing member 20B (see FIG. 5), and the capacitor unit 3.

[0012] <Case> The housing 10 is a metal member for accommodating the electrical components that constitute the booster 2. Examples of the electrical components accommodated in the housing 10 include a capacitor 30 (see FIG. 6), a reactor, an inverter, and a converter.

[0013] The housing 10 has an open top and is integrally formed with a bottom wall portion 11, a peripheral wall portion 12 erected from the peripheral edge of the bottom wall portion 11, and a ring-shaped (rectangular frame-shaped) flange portion 13 extending outward from the upper end of the peripheral wall portion 12 to the outside of the housing 10.

[0014] The bottom wall 11 is formed with a refrigerant flow section 14 (see FIG. 11) that is recessed outward (downward in this embodiment) from the housing 10. The refrigerant flow section 14 will be described in detail later.

[0015] The flange portion 13 is fixed to the lower end of another device (for example, a power module) of the vehicle via bolts or the like.

[0016] <First sealing member and second sealing member> The first sealing member 20A and the second sealing member 20B (see FIG. 5) are annular (substantially rectangular frame-shaped) resin members (gaskets) that seal the gap between the housing 10 and the accommodating case 60 of the capacitor unit 3. The assembled state of the first sealing member 20A and the second sealing member 20B will be described in detail later.

[0017] <Capacitor unit> As shown in FIGS. 2 to 5, the capacitor unit 3 includes a plurality of capacitors 30 (see FIG. 6), a holding member 40 (see FIG. 6), bus bars 50A and 50B, a housing case 60, and a resin part .

[0018] <Capacitor> 6, capacitor 30 is an electrical component (electrical element) that generates heat when energized, and includes two metallized films 31A and 31B, each having an electrode formed on a dielectric film, and metallikon electrodes 32A and 32B as external electrodes. The two metallized films 31A and 31B are stacked on top of each other and wound around the axis of capacitor 30 (around the vertical axis in this embodiment). Metallikon electrode 32A is an external electrode (in this embodiment, an N-side electrode) formed at one axial end (in this embodiment, the lower end) of the wound metallized films 31A and 31B, and is connected to metallized films 31A and 31B and electrically connected to the electrode of metallized film 31A. The metallikon electrode 32B is an external electrode (in this embodiment, a P-side electrode) formed at the other axial end (in this embodiment, the upper end) of the wound metallized films 31A and 31B, and is connected to the metallized films 31A and 31B and is electrically connected to the electrode of the metallized film 31B.

[0019] <Retaining member> The holding member 40 is a metal (or resin) member that holds multiple (three in this embodiment) capacitors 30. In this embodiment, the holding member 40 includes a lower holding member 41 that holds the lower parts of the multiple capacitors 30, and an upper holding member 42 that holds the upper parts of the multiple capacitors 30.

[0020] <Bus bar> The bus bar 50A is a metal member that electrically connects the metallikon electrodes 32A of the multiple capacitors 30 to other electrical components of the booster 2. One end of the bus bar 50A connects the metallikon electrodes 32A of the multiple (nine in this embodiment) capacitors 30 in parallel via lead terminals (not shown). The other end of the bus bar 50A is exposed from the housing case 60 and the resin part 70, which will be described later, and is electrically connected to other electrical components of the booster 2.

[0021] The bus bar 50B is a metal member that electrically connects the metallikon electrodes 32B of the capacitors 30 to other electrical components of the booster 2. One end of the bus bar 50B connects the metallikon electrodes 32B of multiple (nine in this embodiment) capacitors 30 in parallel via lead terminals (not shown). The other end of the bus bar 50B is exposed from the housing case 60 and the resin part 70, which will be described later, and is electrically connected to other electrical components of the booster 2.

[0022] <Capacitor arrangement> The multiple capacitors 30 are aligned with the metallikon electrode 32A formed at one axial end of the capacitor 30 facing in one direction (downward in this embodiment), and are arranged in a row in a direction (parallel to the surface of the metallikon electrode 32A, the left-right direction in this embodiment) that intersects (is perpendicular to) the axial direction of the capacitor 30. Adjacent capacitors 30, 30 are spaced apart at a predetermined interval.

[0023] <Containment Case> As shown in Figures 2 to 5, the storage case 60 is a metal (e.g., aluminum) member that houses multiple capacitors 30. As shown in Figures 7 and 8, the storage case 60 integrally includes a bottom wall 61, an upper wall 62 facing the bottom wall 61, a rear wall 63 connecting the peripheral edges of the bottom wall 61 and the upper wall 62, and a pair of side walls 64, 64. The storage case 60 also integrally includes a pair of flanges 65, 65 extending from both ends of the bottom wall 61 so as to protrude beyond the side walls 64. The storage case 60 also integrally includes a plurality of ribs 66 that define the interior space of the storage case 60. An opening 60a is formed at the front end of the storage case 60.

[0024] The flange portion 65 is a part of the bottom wall portion 61. Both front and rear end portions of the flange portion 65 constitute fixing portions 65a, 65a that are fixed to the bottom wall portion 11 of the housing 10 by bolts or the like. The fixing portion 65a is formed outward from a refrigerant discharge groove portion 61b, which will be described later.

[0025] A plurality of ribs 66 (six in this embodiment) are arranged at equal intervals between the pair of side wall portions 64, 64, and divide the internal space of the storage case 60 into a plurality of sections in the left-right direction. The lower ends of the ribs 66 are connected to the bottom wall portion 61. The upper ends of the ribs 66 are connected to the top wall portion 62. The inner ends (rear ends) of the ribs 66 are connected to the inner wall portion 63. The front-to-rear dimension of the ribs 66 is smaller than the front-to-rear dimensions of the bottom wall portion 61 and the top wall portion 62. The ribs 66 are interposed between adjacent capacitors 30, 30. That is, the capacitors 30 are respectively housed in spaces divided by the ribs 66 within the storage case 60.

[0026] As shown in FIG. 5, the outer surface (the lower surface in this embodiment) of the bottom wall portion 61 is formed with an annular protrusion 61a and a refrigerant discharge groove portion 61b.

[0027] The annular protrusion 61a protrudes downward from the lower surface of the bottom wall 61. The area of ​​the bottom wall 61 surrounded by the annular protrusion 61a forms a refrigerant flow portion 61c.

[0028] The refrigerant discharge groove 61b is formed outside the annular protrusion 61a and inside the fixing portion 65a, and is recessed upward from the lower surface of the bottom wall portion 61. The refrigerant discharge groove 61b is formed so as to be continuous with the pair of side wall portions 64, 64 of the annular protrusion 61a and with the opening portion 60a.

[0029] As shown in FIGS. 11 and 12, the annular protrusion 61a of the bottom wall 61 and the pair of flanges 65, 65 are formed with an annular first groove 60b and an annular second groove 60c.

[0030] The first groove portion 60b is formed on the outer peripheral surface of the annular protrusion 61a.

[0031] The second groove portion 60c is formed on the bottom wall portion 61 and the lower surfaces of the pair of flange portions 65, 65. The second groove portion 60c is formed in an annular shape so as to surround the annular protrusion portion 61a and the refrigerant discharge groove portion 61b from the axial outside of the accommodating case 60.

[0032] <Resin part> The resin portion 70 is a resin (e.g., epoxy resin) that is filled and solidified inside the accommodating case 60 so as to cover the plurality of capacitors 30, the holding member 40, and the bus bars 50A and 50B accommodated in the accommodating case 60. The resin portion 70 prevents the capacitors 30 from coming into contact with the refrigerant 4 (see FIGS. 11 and 12).

[0033] <Refrigerant distribution structure> The refrigerant flow section 14 formed in the bottom wall section 11 of the housing 10 integrally includes a peripheral wall section 14a extending from the bottom wall section 11 outward (downward in this embodiment) of the housing 10, and an end wall section 14b closing the leading end (lower end in this embodiment) of the peripheral wall section 14a. Holes 14c, 14c which are inlets and outlets for the refrigerant 4 are formed at both left and right ends of the peripheral wall section 14a, respectively.

[0034] The accommodating case 60 is fixed to the housing 10 by fastening the fixing portions 65a to the bottom wall 11 with bolts. In this fixed state, the annular protrusion 61a is fitted (internal fit) with the peripheral wall 14a of the refrigerant flow portion 14. That is, the annular protrusion 61a and the refrigerant flow portion 61c cooperate with the refrigerant flow portion 14 (peripheral wall 14a and end wall 14b) to form a refrigerant flow path R1 through which the refrigerant 4 flows. In addition, this fitted portion is sealed by the first sealing member 20A housed in the first groove 60b to prevent the refrigerant 4 from flowing.

[0035] The first sealing member 20A is accommodated in the first groove portion 60b with a portion of the first sealing member 20A protruding from the first groove portion 60b before the housing 10 and the storage case 60 are assembled. The first sealing member 20A is press-fitted between the bottom surface of the first groove portion 60b and the peripheral wall portion 14a, thereby serving as an axial seal that provides a sealing function in the axial direction of the storage case 60 between the annular protrusion 61a and the peripheral wall portion 14a.

[0036] Outside the refrigerant flow path R1, the refrigerant discharge groove 61b faces the bottom wall 11 and communicates with a hole 11a formed in the bottom wall 11. The hole 11a is for discharging the refrigerant 4 that has entered the housing 10 to the outside of the housing 10. In other words, the refrigerant discharge groove 61b cooperates with the bottom wall 11 to form a refrigerant discharge path R2 through which the refrigerant 4 is discharged.

[0037] Outside the refrigerant discharge passage R2, the bottom wall portion 61 and the flange portion 65 abut against the bottom wall portion 11. This abutting portion is sealed by the second sealing member 20B housed in the second groove portion 60c to prevent the refrigerant 4 from flowing through it.

[0038] The second sealing member 20B is accommodated in the second groove portion 60c with a portion of the second sealing member 20B protruding from the second groove portion 60c before the housing 10 and the storage case 60 are assembled. The second sealing member 20B is press-fitted between the bottom surface of the second groove portion 60c and the bottom wall portion 11, thereby serving as a surface seal that provides a sealing function in a surface direction perpendicular to the axial direction between the bottom wall portion 61 and the bottom wall portion 11.

[0039] The electrical component cooling structure 1 employs the first sealing member 20A as an axial seal and the second sealing member 20B as a face seal, which reduces the number of fixing points of the electrical components (capacitor 30, capacitor unit 3) to the housing 10 and simplifies the structure compared to when two face seals are employed. Furthermore, the electrical component cooling structure 1 shortens the distance between the capacitor 30 and an external device (for example, a power module) and reduces parasitic inductance compared to when two axial seals are employed.

[0040] In this structure, the refrigerant 4 flowing through the refrigerant flow path R1 exchanges heat with the metallikon electrode 32A through the bottom wall portion 61, thereby absorbing and dissipating heat generated inside the capacitor 30 and cooling the capacitor 30. The heat generated in the metallized films 31A, 31B of the capacitor 30 is conducted more efficiently in the axial direction along which the metallized films 31A, 31B are wound (in this embodiment, the vertical direction) than in the direction perpendicular to that axis.

[0041] Heat generated in metallized films 31A, 31B is transferred to metallikon electrode 32A and then transferred to refrigerant 4 via bottom wall portion 61, which is located near metallikon electrode 32A and faces metallikon electrode 32A via resin portion 70. In other words, capacitor 30 is suitably cooled by refrigerant 4 because metallikon electrode 32A is located close to bottom wall portion 61.

[0042] Furthermore, a portion of the heat generated in metallized films 31A, 31B is transferred to metallikon electrode 32B, and then transferred from top wall 62, which is located near metallikon electrode 32B and faces metallikon electrode 32B with resin portion 70 interposed therebetween, to bottom wall 61 via back wall 63, side wall 64, or rib 66, and then transferred via bottom wall 61 to refrigerant 4. That is, since metallikon electrode 32B is located near top wall 62, which is connected to bottom wall 61 via rib 66 or the like, capacitor 30 is suitably cooled by refrigerant 4. Note that a portion of the heat transferred to metallikon electrode 32B is transferred from top wall 62, back wall 63, and side wall 64 to the air outside housing case 60.

[0043] Here, adjacent capacitors 30 are arranged so that their metallikon electrodes 32A, 32B are aligned in a direction intersecting the arrangement direction. This structure can suppress temperature increases due to thermal interference between adjacent capacitors 30, 30 compared to when their metallikon electrodes 32A, 32B face each other. Furthermore, this configuration can shorten the distance between adjacent capacitors 30, 30.

[0044] The ribs 66 also suppress temperature increases due to thermal interference between adjacent condensers 30, 30, contributing to reducing the maximum temperature of the condenser 30. The ribs 66 also improve the strength of the casing 60, and by thinning the bottom wall 61, the cooling performance of the condenser 30 is improved.

[0045] <Structure to prevent refrigerant from entering the housing> Here, a case will be described in which the refrigerant 4 leaks beyond the first sealing member 20A to the outside of the refrigerant flow path R1 (toward an area of ​​the housing 10 outside the refrigerant flow path R1 where electrical components other than the capacitor 30 are accommodated). In this case, the refrigerant 4 is discharged to the outside of the housing 10 via the refrigerant discharge path R2 and the hole 11a before entering the inside of the housing 10 (an area of ​​the housing 10 outside the refrigerant flow path R1 where electrical components other than the capacitor 30 are accommodated). Furthermore, the refrigerant 4 that has leaked to the outside of the refrigerant flow path R1 is prevented by the second sealing member 20B from entering the inside of the housing 10 (an area of ​​the housing 10 outside the refrigerant flow path R1 where electrical components other than the capacitor 30 are accommodated).

[0046] A capacitor unit 3 according to an embodiment of the present invention comprises a plurality of capacitors 30 arranged in a row and having a metallikon electrode 32A at one axial end thereof, and a casing 60 in which the plurality of capacitors 30 are housed, the plurality of capacitors 30 being arranged in a direction intersecting the axial direction of the capacitors 30 with the metallikon electrode 32A facing in one direction, the casing 60 having a rib 66 interposed between two adjacent capacitors 30, and a wall portion (bottom wall portion 61) of the casing 60 facing the metallikon electrode 32A forming part of a refrigerant flow path (refrigerant flow path R1). Therefore, the condenser unit 3 can achieve suitable cooling of the condenser 30.

[0047] In the capacitor unit 3, the rib 66 is connected to the wall portion. Therefore, the condenser unit 3 can achieve suitable cooling of the condenser 30 via the ribs 66.

[0048] In the capacitor unit 3, the rib 66 is connected to another wall portion (upper wall portion 62) of the casing 60 that faces the other end portion of the capacitor 30 in the axial direction. Therefore, by realizing a thinner wall portion of the condenser unit 3, it is possible to achieve more suitable cooling of the condenser 30.

[0049] The electrical component cooling structure 1 according to an embodiment of the present invention includes an electrical component (capacitor 30) that generates heat when energized, a storage case 60 that stores the electrical component, and a housing 10 to which the storage case 60 is attached. One wall portion (bottom wall portion 11) of the housing 10 is recessed from the one wall portion toward the outside of the housing 10 and includes a refrigerant flow portion 14 through which a refrigerant 4 flows and a hole portion 11a for discharging the refrigerant 4 that has entered the housing 10. The one wall portion (bottom wall portion 61) of the storage case 60 has a front The refrigerant flow section 14 includes an annular protrusion 61a fitted into the refrigerant flow section 14, a refrigerant discharge groove 61b formed outside the annular protrusion 61a so as to communicate with the hole 11a, and a fixing portion 65a fixed to the housing 10 outside the refrigerant discharge groove 61b. A first groove 60b is formed on at least one of the inner peripheral surface of the refrigerant flow section 14 and the outer peripheral surface of the annular protrusion 61a, and a first sealing member 20A is accommodated in the first groove 60b to seal the space between the refrigerant flow section 14 and the annular protrusion 61a. Therefore, the electrical component cooling structure 1 improves the cooling efficiency of the electrical components, effectively prevents the refrigerant 4 from entering the housing 10 (leaking from the refrigerant flow path R1), and can effectively discharge the refrigerant 4 that has entered the housing 10 (leaking from the refrigerant flow path R1) outside the housing 10.

[0050] In the electrical component cooling structure 1, a second groove portion 60c is formed in at least one of one wall portion of the housing 10 and one wall portion of the storage case 60 between the refrigerant discharge groove portion 61b and the fixed portion 65a, in which a second sealing member 20B that seals the space between the housing 10 and the storage case 60 is accommodated. Therefore, the electrical component cooling structure 1 improves the cooling efficiency of the electrical components, more effectively prevents the refrigerant 4 from entering the housing 10 (leaking from the refrigerant flow path R1), and more effectively discharges the refrigerant 4 that has entered the housing 10 (leaking from the refrigerant flow path R1) outside the housing 10.

[0051] Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be modified as appropriate without departing from the spirit and scope of the present invention. For example, the electrical component cooling structure 1 and / or the capacitor unit 3 of the present invention can be applied to heavy machinery, ships, and the like in addition to electric vehicles. Furthermore, the first groove 60b in which the first sealing member 20A is accommodated may be formed in the peripheral wall 14a of the refrigerant flow section 14 of the housing 10, or may be formed in both the peripheral wall 14a and the annular protrusion 61a. Similarly, the second groove 60c in which the second sealing member 20B is accommodated may be formed in the bottom wall 11 of the housing 10, or may be formed in both the bottom wall 11, the bottom wall 61, and the flange 65. [Explanation of symbols]

[0052] 1 Electrical component cooling structure 2. Step-up 3 Capacitor unit (electrical component unit) 4 Refrigerants 10. Cabinet 11 Bottom wall (one wall) 11a Hole 12 Peripheral wall section 13 Flange 14 Refrigerant flow section 20A First sealing member 20B Second sealing member 30 Capacitors (electrical components) 31A, 31B Metallized film 32A, 32B Metallicon electrodes 40 Retaining member 41 Lower holding member 42 Upper holding member 50A, 50B bus bar 60 Storage Case 60a opening 60b First groove 60c Second groove 61 Bottom wall (wall, one wall) 61a Annular convex part 61b refrigerant discharge groove 62 Upper wall (other wall) 63 Back wall 64 Side wall 65 Flange part (one wall part) 65a Fixed part 66 Ribs 70 Resin part R1 Coolant flow path (flow path) R2 Refrigerant discharge path

Claims

1. The device comprises an electric component that generates heat when energized, a housing case that houses the electric component, and a housing that houses the housing case and to which the housing case is attached, One wall portion of the housing is a refrigerant flow portion recessed from the one wall portion toward the outside of the housing and through which a refrigerant flows; a hole for discharging the refrigerant that has entered the housing; Equipped with One wall portion of the storage case is an annular protrusion fitted into the refrigerant flow portion; a refrigerant discharge groove formed outside the annular protrusion so as to communicate with the hole; a fixing portion fixed to the housing outside the refrigerant discharge groove portion; Equipped with the refrigerant flow portion, the annular convex portion, and a portion of the one wall portion of the accommodating case that is surrounded by the annular convex portion constitute a refrigerant flow path through which the refrigerant flows, a portion surrounded by the one wall portion of the housing and the refrigerant discharge groove portion forms a refrigerant discharge path that discharges the refrigerant leaking from the refrigerant flow path to the outside of the housing through the hole portion, A first groove portion is formed on at least one of an inner peripheral surface of the refrigerant flow portion and an outer peripheral surface of the annular protrusion, and the first groove portion accommodates a first sealing member that seals the gap between the refrigerant flow portion and the annular protrusion.

1. An electrical component cooling structure comprising:

2. Between the refrigerant discharge groove and the fixed portion, a second groove is formed in at least one of the one wall portion of the housing and the one wall portion of the storage case, and a second sealing member that seals the space between the housing and the storage case is accommodated therein.

2. The electrical component cooling structure according to claim 1.

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