Electrical component cooling structure

Abstract

The invention provides an electrical component cooling structure which can improve the cooling efficiency of an electrical component, appropriately prevent a refrigerant from entering a housing, and appropriately discharge the refrigerant entering the housing to the outside of the housing. The electrical component cooling structure includes an electrical component (capacitor) that generates heat when energized, a housing box that houses the electrical component, and a housing to which the housing box is attached, and one wall portion (bottom wall portion) of the housing includes a refrigerant circulation portion that is recessed from the one wall portion to the outside of the housing and through which a refrigerant circulates, and a hole portion for discharging the refrigerant entering the housing. One wall portion (bottom wall portion) of the housing case has an annular protrusion portion fitted in the refrigerant circulation portion, a refrigerant discharge groove portion formed on the outside of the annular protrusion portion so as to communicate with the hole portion, and a fixing portion fixed to the housing on the outside of the refrigerant discharge groove portion. A first groove portion in which a first seal member for sealing between the refrigerant circulation portion and the annular protrusion portion is accommodated is formed.

Description

Technical Field

[0001] The present invention relates to a structure for cooling electric components using a refrigerant. Background Art

[0002] Patent Document 1 describes a power conversion device comprising a main circuit box for housing a main circuit unit and a capacitor box for housing capacitor elements. The main circuit box comprises a baseboard on which the main circuit unit is mounted and a cover covering the main circuit unit. The capacitor box is mounted on the side of the baseboard opposite the main circuit unit, closing the opening of the capacitor box. Furthermore, a refrigerant flow path for circulating a refrigerant for cooling the main circuit unit is formed within the baseboard.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 6236904 Summary of the Invention

[0006] In the above-mentioned structure, the refrigerant flow path is primarily used to cool the main circuit. To improve the cooling performance of the capacitor elements, one option is to house the capacitor box within the main circuit box and, by combining the walls of the main circuit box with those of the capacitor box, form a refrigerant flow path between these walls. However, this configuration raises concerns that refrigerant could enter the main circuit box through gaps in the walls.

[0007] The present invention is made in view of the above points, and aims to provide an electrical component cooling structure that can improve the cooling efficiency of the electrical components, properly prevent the refrigerant from entering the housing, and properly discharge the refrigerant that has entered the housing to the outside of the housing.

[0008] In order to solve the above-mentioned problems, the electrical component cooling structure of the present invention is characterized in that it has an electrical component that generates heat when energized, a storage box for storing the electrical component, and a shell for installing the storage box, and one wall portion of the shell has: a refrigerant circulation portion that is recessed from the one wall portion toward the outside of the shell and through which the refrigerant circulates; and a hole portion for discharging the refrigerant entering the shell, and one wall portion of the storage box has: an annular convex portion embedded in the refrigerant circulation portion; a refrigerant discharge groove portion formed on the outside of the annular convex portion in a manner connected to the hole portion; and a fixing portion fixed to the shell on the outside of the refrigerant discharge groove portion, and a first groove portion for accommodating a first sealing component that seals between the refrigerant circulation portion and the annular convex portion is formed on at least one of the inner circumferential surface of the refrigerant circulation portion and the outer circumferential surface of the annular convex portion.

[0009] Effects of the Invention

[0010] According to the present invention, it is possible to improve the cooling efficiency of the electric components, appropriately prevent the refrigerant from entering the housing, and appropriately discharge the refrigerant that has entered the housing to the outside of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a perspective view schematically showing a booster to which the electric component cooling structure according to the embodiment of the present invention is applied.

[0012] Figure 2 It is a perspective view schematically showing a capacitor unit according to an embodiment of the present invention.

[0013] Figure 3 It is a plan view schematically showing a capacitor unit according to an embodiment of the present invention.

[0014] Figure 4 It is a side view schematically showing a capacitor unit according to an embodiment of the present invention.

[0015] Figure 5 It is a bottom view schematically showing a capacitor unit according to an embodiment of the present invention.

[0016] Figure 6 It is a perspective view schematically showing an assembly of a capacitor, a holding member, and a bus bar according to an embodiment of the present invention.

[0017] Figure 7 It is a perspective view schematically showing a storage box according to an embodiment of the present invention.

[0018] Figure 8 It is a front view schematically showing a storage box according to an embodiment of the present invention.

[0019] Figure 9 It is a perspective view schematically showing a state in which a resin portion is removed from the capacitor unit according to the embodiment of the present invention.

[0020] Figure 10 This 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.

[0021] Figure 11 yes Figure 1 The XI-XI line cross-sectional view is a cross-sectional view schematically showing the electric component cooling structure according to the embodiment of the present invention.

[0022] Figure 12 yes Figure 11 A partial enlarged view of .

[0023] Description of Reference Numerals

[0024] 1Electrical component cooling structure

[0025] 2 Booster

[0026] 3Capacitor unit (electrical component unit)

[0027] 4 refrigerant

[0028] 10 shell

[0029] 11 bottom wall (one wall)

[0030] 11a hole

[0031] 12 surrounding walls

[0032] 13 flange

[0033] 14Refrigerant Distribution Department

[0034] 20A first sealing component

[0035] 20B second sealing component

[0036] 30 Capacitors (electrical components)

[0037] 31A, 31B metallized film

[0038] 32A, 32B metal spraying electrodes

[0039] 40 holding components

[0040] 41 lower retaining member

[0041] 42 upper retaining member

[0042] 50A, 50B busbar

[0043] 60 storage boxes

[0044] 60a opening

[0045] 60b first groove portion

[0046] 60c second groove portion

[0047] 61 bottom wall portion (wall portion, one wall portion)

[0048] 61a annular convex portion

[0049] 61b refrigerant discharge groove

[0050] 62 upper wall (other wall)

[0051] 63 inner wall part

[0052] 64 side wall

[0053] 65 flange portion (one wall portion)

[0054] 65a fixed part

[0055] 66 ribs

[0056] 70 resin department

[0057] R1 refrigerant flow path (flow path)

[0058] R2 refrigerant discharge path DETAILED DESCRIPTION

[0059] Next, the case where the electrical component cooling structure of the present invention is used to cool the electrical components constituting the booster (VCU: Voltage Control Unit) in a vehicle is taken as an example, with appropriate reference to the attached drawings. Figure 1 The embodiments of the present invention will be described in detail. As a vehicle to which the electrical component cooling structure of the present invention is applicable, an electric vehicle (electric vehicle, etc.) using a motor as a power source can be cited. In addition, as an electrical component, a capacitor can be cited.

[0060] In the following description, the vertical direction is based on the state of the booster installed in the vehicle. Furthermore, the directions orthogonal to the vertical direction, namely the front-back direction and the left-right direction, are based on the storage box housing the capacitor. The front-back direction refers to the depth of the storage box, and the left-right direction refers to the width of the storage box. In other words, the front-back direction and the left-right direction used in this embodiment are not limited to being consistent with the front-back direction and the left-right direction of the vehicle.

[0061] like Figure 1 As shown, the electrical component cooling structure 1 according to the embodiment of the present invention is a capacitor 30 (see Figure 6 ) is cooled, and the capacitor 30 is an electrical component constituting an electric circuit of the booster 2 mounted on the vehicle. Figure 1 In the figure, electrical components (electrical component units) other than the capacitor unit 3 are omitted. The booster 2 is arranged between the battery and the motor of the vehicle, boosts the battery voltage to the 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 comprises a housing 10, a first sealing member 20A (see FIG. Figure 5 )、Second sealing member 20B (refer to Figure 5 ), and capacitor unit 3.

[0062] <Housing>

[0063] The housing 10 is a metal member for housing the electrical components and the like constituting the booster 2. As the electrical components housed in the housing 10, the capacitor 30 (see Figure 6 ), reactors, inverters, converters, etc.

[0064] The shell 10 is open at the top and has a bottom wall 11, a peripheral wall 12 extending from the peripheral edge of the bottom wall 11, and an annular (rectangular frame-shaped) flange 13 extending from the upper end of the peripheral wall 12 toward the outside of the shell 10.

[0065] The bottom wall portion 11 is formed with a refrigerant flow portion 14 (see FIG. 1 ) that is recessed toward the outside (in this embodiment, downward) of the housing 10 . Figure 11 ) The refrigerant circulation portion 14 will be described in detail later.

[0066] The flange portion 13 is fixed to a lower end portion of another device (for example, a power module) of the vehicle via bolts or the like.

[0067] <First Sealing Member and Second Sealing Member>

[0068] The first sealing member 20A and the second sealing member 20B (see Figure 5 ) is an annular (approximately rectangular frame-shaped) resin member (gasket) that seals between the housing 10 and the storage box 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.

[0069] <Capacitor unit>

[0070] like Figures 2 to 5 As shown, the capacitor unit 3 has a plurality of capacitors 30 (see Figure 6 ), holding member 40 (refer to Figure 6 ), busbars 50A, 50B, a storage box 60, and a resin portion 70.

[0071] Capacitors

[0072] like Figure 6 As shown, capacitor 30 is an electrical component (electrical element) that generates heat when current is applied. It has two metallized films 31A and 31B with electrodes formed on a dielectric film, and metallized electrodes 32A and 32B serving as external electrodes. The two metallized films 31A and 31B are wound around the axis of capacitor 30 (in this embodiment, around the upper and lower axes) while overlapping each other. Metallized electrode 32A is an external electrode (in this embodiment, the N-side electrode) formed at one axial end (in this embodiment, the lower end) of the wound metallized films 31A and 31B. It is connected to metallized films 31A and 31B and electrically connected to the electrodes of metallized film 31A. Metallized electrode 32B is an external electrode (in this embodiment, the P-side electrode) formed at the other axial end 8 (in this embodiment, the upper end) of the wound metallized films 31A and 31B. It is connected to metallized films 31A and 31B and electrically connected to the electrodes of metallized film 31B.

[0073] <Retaining parts>

[0074] 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 portions of the multiple capacitors 30 and an upper holding member 42 that holds the upper portions of the multiple capacitors 30.

[0075] Busbar

[0076] The busbar 50A is a metal component that electrically connects the metallized electrodes 32A of the plurality of capacitors 30 to other electrical components of the booster 2. One end of the busbar 50A connects the metallized electrodes 32A of the plurality (nine in this embodiment) of capacitors 30 in parallel via lead terminals (not shown). The other end of the busbar 50A is exposed from the housing box 60 and the resin portion 70 (described later) and is electrically connected to other electrical components of the booster 2.

[0077] The busbar 50B is a metal component that electrically connects the metallized electrodes 32B of the capacitors 30 to other electrical components of the booster 2. One end of the busbar 50B connects the metallized electrodes 32B of multiple (nine in this embodiment) capacitors 30 in parallel via lead terminals (not shown). The other end of the busbar 50B is exposed from the housing box 60 and resin portion 70 (described later) and is electrically connected to other electrical components of the booster 2.

[0078] <Capacitor Arrangement>

[0079] Multiple capacitors 30 are aligned with a metallized electrode 32A formed at one axial end of each capacitor 30 facing one side (downward in this embodiment), and arranged in a row in a direction intersecting (orthogonal to) the axial direction of each capacitor 30 (a direction parallel to the surface of the metallized electrode 32A, in this embodiment, the horizontal direction). Adjacent capacitors 30 are separated by a predetermined distance.

[0080] <Storage Box>

[0081] like Figures 2 to 5 As shown, the storage box 60 is a metal (for example, aluminum) component for storing a plurality of capacitors 30. Figure 7 as well as Figure 8As shown, the storage box 60 integrally includes a bottom wall portion 61, an upper wall portion 62 opposing the bottom wall portion 61, an inner wall portion 63 connecting the peripheries of the bottom wall portion 61 and the upper wall portion 62, and a pair of side walls 64, 64. Furthermore, the storage box 60 integrally includes a pair of flange portions 65, 65 extending from both ends of the bottom wall portion 61 so as to protrude beyond the side walls 64. Furthermore, the storage box 60 integrally includes a plurality of ribs 66 that partition the interior space of the storage box 60. An opening 60a is formed at the front end of the storage box 60.

[0082] The flange portion 65 is a portion of the bottom wall portion 61. The flange portion 65 has both front and rear end portions 65a, 65a fixed to the bottom wall portion 11 of the housing 10 by bolts or the like. The fixing portion 65a is formed outside the refrigerant discharge groove portion 61b, which will be described later.

[0083] A plurality of (six in the present embodiment) ribs 66 are arranged at equal intervals between a pair of side wall portions 64, 64, dividing the internal space of the storage box 60 into a plurality of spaces along the left-right direction. The lower end portion of the rib 66 is connected to the bottom wall portion 61. The upper end portion of the rib 66 is connected to the upper wall portion 62. The inner end portion (rear end portion) of the rib 66 is connected to the inner wall portion 63. The front-to-back dimension of the rib 66 is smaller than the front-to-back dimension of the bottom wall portion 61 and the upper wall portion 62. The rib 66 is sandwiched between adjacent capacitors 30, 30. That is, the capacitors 30 are respectively accommodated in the spaces divided by the ribs 66 in the storage box 60.

[0084] like Figure 5 As shown, an annular protrusion 61 a and a refrigerant discharge groove 61 b ​​are formed on the outer side surface (the lower surface in this embodiment) of the bottom wall 61 .

[0085] The annular protrusion 61a protrudes downward from the lower surface of the bottom wall 61. The portion of the bottom wall 61 surrounded by the annular protrusion 61a constitutes a refrigerant flow portion 61c.

[0086] The coolant 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 61. The coolant discharge groove 61b is formed so as to be continuous with the pair of side walls 64, 64 of the annular protrusion 61a and the opening 60a.

[0087] like Figure 11 as well as Figure 12 As shown, an annular first groove portion 60 b and an annular second groove portion 60 c are formed in the annular convex portion 61 a and the pair of flange portions 65 , 65 of the bottom wall portion 61 .

[0088] The first groove portion 60b is formed on the outer peripheral surface of the annular convex portion 61a.

[0089] The second groove 60c is formed on the bottom wall 61 and the lower surfaces of the pair of flanges 65, 65. The second groove 60c is formed in an annular shape so as to surround the annular convex portion 61a and the refrigerant discharge groove 61b from the axially outer side of the storage box 60.

[0090] <Resin Department>

[0091] The resin portion 70 is a resin (for example, epoxy resin) that is filled in the storage box 60 and hardened so as to cover the plurality of capacitors 30, the holding member 40, and the busbars 50A and 50B stored in the storage box 60. The resin portion 70 prevents the capacitors 30 from contacting the refrigerant 4 (see FIG. 1 ). Figure 11 as well as Figure 12 )touch.

[0092] <Refrigerant circulation structure>

[0093] The refrigerant flow portion 14 formed in the bottom wall portion 11 of the housing 10 integrally includes a peripheral wall portion 14a extending from the bottom wall portion 11 toward the outside (in this embodiment, downward) of the housing 10, and an end wall portion 14b that blocks the front end (in this embodiment, the lower end) of the peripheral wall portion 14a. Holes 14c, 14c serving as inlets and outlets for the refrigerant 4 are formed at the left and right ends of the peripheral wall portion 14a, respectively.

[0094] The storage box 60 is bolted to the bottom wall 11 in the fixing portion 65a, thereby being fixed to the housing 10. In this fixed state, the annular protrusion 61a is embedded in (internal to) the peripheral wall 14a of the refrigerant circulation portion 14. In other words, the annular protrusion 61a and the refrigerant circulation portion 61c cooperate with the refrigerant circulation portion 14 (the peripheral wall 14a and the end wall 14b) to form a refrigerant flow path R1 for the circulation of the refrigerant 4. In addition, this embedded portion is sealed by the first sealing member 20A housed in the first groove 60b, preventing the refrigerant 4 from circulating.

[0095] Before the housing 10 and the storage box 60 are assembled, the first sealing member 20A is housed in the first groove 60b with a portion thereof protruding from the first groove 60b. The first sealing member 20A is a shaft seal that, by being press-fitted between the bottom surface of the first groove 60b and the peripheral wall 14a, performs a sealing function in the axial direction of the storage box 60 between the annular protrusion 61a and the peripheral wall 14a.

[0096] On the outside of this refrigerant flow path R1, the refrigerant discharge groove portion 61b faces the bottom wall portion 11 and communicates with the hole portion 11a formed in the bottom wall portion 11. The hole portion 11a is used to discharge the refrigerant 4 entering the housing 10 to the outside of the housing 10. In other words, the refrigerant discharge groove portion 61b and the bottom wall portion 11 cooperate to form the refrigerant discharge path R2 for discharging the refrigerant 4.

[0097] 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 so as to prevent the refrigerant 4 from flowing.

[0098] Before the housing 10 and the storage box 60 are assembled, the second sealing member 20B is housed in the second groove 60c with a portion thereof protruding from the second groove 60c. The second sealing member 20B is a surface seal that, by being pressed between the bottom surface of the second groove 60c and the bottom wall 11, performs a sealing function in a plane direction perpendicular to the axial direction between the bottom wall 61 and the bottom wall 11.

[0099] The electrical component cooling structure 1 utilizes a first seal member 20A as a shaft seal and a second seal member 20B as a face seal. This reduces the number of points at which the electrical components (capacitor 30, capacitor unit 3) are fixed to the housing 10, compared to using two face seals, resulting in a simpler structure. Furthermore, compared to using two shaft seals, the electrical component cooling structure 1 shortens the distance between the capacitor 30 and external devices (e.g., a power module), reducing parasitic inductance.

[0100] In this structure, refrigerant 4 flowing through refrigerant flow path R1 exchanges heat with metallized electrode 32A via bottom wall portion 61, thereby absorbing and dissipating heat generated within capacitor 30, thereby cooling capacitor 30. Regarding the efficiency of heat conduction generated by metallized films 31A and 31B of capacitor 30, the efficiency in the axial direction (in this embodiment, the vertical direction) in which metallized films 31A and 31B are wound is higher than the efficiency in a direction perpendicular to this axis.

[0101] Heat generated by metallized films 31A and 31B is transferred to metal spray electrode 32A and then to coolant 4 via bottom wall portion 61, which is located near metal spray electrode 32A and faces resin portion 70 across metal spray electrode 32A. In other words, because metal spray electrode 32A and bottom wall portion 61 are positioned close to each other, capacitor 30 is appropriately cooled by coolant 4.

[0102] Furthermore, a portion of the heat generated by the metallized films 31A and 31B is transferred to the metallized electrode 32B, and then from the upper wall portion 62, which is located near the metallized electrode 32B and faces the resin portion 70 across the metallized electrode 32B, to the bottom wall portion 61 via any one of the inner wall portion 63, the side wall portion 64, and the rib 66. The heat is then transferred to the coolant 4 via the bottom wall portion 61. Specifically, because the metallized electrode 32B is disposed proximate to the upper wall portion 62, which is connected to the bottom wall portion 61 via the rib 66 and the like, the capacitor 30 is appropriately cooled by the coolant 4. Furthermore, a portion of the heat transferred to the metallized electrode 32B is transferred to the ambient air outside the storage box 60 via the upper wall portion 62, the inner wall portion 63, and the side wall portion 64.

[0103] Here, the metallized electrodes 32A and 32B of adjacent capacitors 30 are aligned in a direction intersecting the arrangement direction. This structure can suppress temperature increases caused by thermal interference between adjacent capacitors 30, 30, compared to a situation where the metallized electrodes 32A and 32B of adjacent capacitors 30, 30 face each other. Furthermore, this configuration can shorten the distance between adjacent capacitors 30, 30.

[0104] Furthermore, ribs 66 suppress temperature rise caused by thermal interference between adjacent capacitors 30, 30, contributing to lowering the maximum temperature of capacitors 30. Ribs 66 also increase the strength of housing box 60 and improve cooling performance of capacitors 30 by thinning bottom wall 61.

[0105] <Refrigerant intrusion prevention structure>

[0106] Here, a case is described in which the refrigerant 4 leaks past the first sealing member 20A to the outside of the refrigerant flow path R1 (in the direction toward the area within the housing 10 that is located outside the refrigerant flow path R1 and accommodates electrical components other than the capacitor 30). In this case, the refrigerant 4 is discharged to the outside of the housing 10 through the refrigerant discharge path R2 and the hole portion 11a before entering the housing 10 (the area within the housing 10 that is located outside the refrigerant flow path R1 and accommodates electrical components other than the capacitor 30). In addition, the refrigerant 4 that leaks to the outside of the refrigerant flow path R1 is prevented from entering the housing 10 (the area within the housing 10 that is located outside the refrigerant flow path R1 and accommodates electrical components other than the capacitor 30) by the second sealing member 20B.

[0107] The capacitor unit 3 of an embodiment of the present invention has a plurality of capacitors 30 and a storage box 60 for accommodating the plurality of capacitors 30, the plurality of capacitors 30 being arranged in a row and having a metal-sprayed electrode 32A at one end in the axial direction, the plurality of capacitors 30 being arranged in a direction intersecting the axial direction of the capacitor 30 with the metal-sprayed electrode 32A facing one side, the storage box 60 having a rib 66 sandwiched between two adjacent capacitors 30, and the wall portion (bottom wall portion 61) of the storage box 60 opposite to the metal-sprayed electrode 32A constituting a part of the flow path (refrigerant flow path R1) of the refrigerant 4.

[0108] Therefore, the capacitor unit 3 can achieve appropriate cooling of the capacitor 30 .

[0109] In the capacitor unit 3 , the rib 66 is connected to the wall portion.

[0110] Therefore, the capacitor unit 3 can achieve appropriate cooling of the capacitor 30 via the ribs 66 .

[0111] In the capacitor unit 3 , the rib 66 is connected to another wall portion (upper wall portion 62 ) of the storage box 60 that faces the other end portion in the axial direction of the capacitor 30 .

[0112] Therefore, capacitor unit 3 can achieve further appropriate cooling of capacitor 30 by reducing the wall thickness.

[0113] The electrical component cooling structure 1 of the embodiment of the present invention comprises an electrical component (capacitor 30) that generates heat when energized, a storage box 60 for storing the electrical component, and a housing 10 for mounting the storage box 60. One wall portion (bottom wall portion 11) of the housing 10 comprises a refrigerant flow portion 14 that is recessed from the one wall portion toward the outside of the housing 10 and through which the refrigerant 4 flows, and a hole portion 11a for discharging the refrigerant 4 that has entered the housing 10. One wall portion (bottom wall portion 61) of the storage box 60 comprises a refrigerant flow portion 14 that is recessed from the one wall portion toward the outside of the housing 10 and through which the refrigerant 4 flows. The annular protrusion 61a of the refrigerant circulation portion 14, the refrigerant discharge groove portion 61b formed on the outer side of the annular protrusion 61a in a manner connected to the hole portion 11a, and the fixing portion 65a fixed to the shell 10 on the outer side of the refrigerant discharge groove portion 61b, and a first groove portion 60b for accommodating a first sealing component 20A that seals between the refrigerant circulation portion 14 and the annular protrusion 61a are formed on at least one of the inner circumferential surface of the refrigerant circulation portion 14 and the outer circumferential surface of the annular protrusion 61a.

[0114] Therefore, the electrical component cooling structure 1 can improve the cooling efficiency of the electrical components, properly prevent the refrigerant 4 from entering the shell 10 (leaking from the refrigerant flow path R1), and properly discharge the refrigerant 4 that has entered the shell 10 (leaking from the refrigerant flow path R1) to the outside of the shell 10.

[0115] In the electrical component cooling structure 1, a second groove 60c for accommodating a second sealing member 20B that seals between the housing 10 and the storage box 60 is formed between the refrigerant discharge groove 61b and the fixing portion 65a in at least one of one wall of the housing 10 and one wall of the storage box 60.

[0116] Therefore, the electrical component cooling structure 1 can improve the cooling efficiency of the electrical components, properly prevent the refrigerant 4 from entering the shell 10 (leaking from the refrigerant flow path R1), and properly discharge the refrigerant 4 that has entered the shell 10 (leaking from the refrigerant flow path R1) to the outside of the shell 10.

[0117] The above describes the embodiment of the present invention, but the present invention is not limited to the above embodiment and can be appropriately modified within the 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 engineering machinery, ships, etc. in addition to electric vehicles. In addition, the first groove portion 60b for accommodating the first sealing component 20A can also be formed in the peripheral wall portion 14a of the refrigerant circulation portion 14 of the housing 10, or can be formed on both sides of the peripheral wall portion 14a and the annular protrusion 61a. Similarly, the second groove portion 60c for accommodating the second sealing component 20B can also be formed in the bottom wall portion 11 of the housing 10, or can be formed in both sides of the bottom wall portion 11, the bottom wall portion 61, and the flange portion 65.

Claims

1. An electrical component cooling structure, characterized in that: The device comprises an electrical component that generates heat when energized, a storage box for storing the electrical component, and a housing for mounting the storage box. One wall portion of the housing has: a refrigerant flow portion that is recessed from the one wall portion toward the outside of the housing and through which refrigerant flows; and a hole for discharging the refrigerant entering the shell, One wall portion of the storage box has: an annular convex portion embedded in the refrigerant circulation portion; a refrigerant discharge groove portion formed in an outer side of the annular convex portion so as to communicate with the hole portion; and A fixing portion fixed to the housing on the outer side of the refrigerant discharge groove portion, A first groove portion for accommodating a first sealing member that seals between the refrigerant flow portion and the annular convex 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 convex portion.

2. The electrical component cooling structure according to claim 1, wherein: A second groove for accommodating a second sealing member that seals between the housing and the storage box is formed in at least one of one wall of the case and one wall of the storage box between the refrigerant discharge groove and the fixing portion.

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