JP4415697B2 - Cooling structure for electrical equipment - Google Patents

Description

  The present invention relates to a cooling structure for cooling an electric device mounted on a vehicle, and particularly to a structure of a refrigerant passage.

  Conventionally, electric vehicles, hybrid vehicles, and fuel cell vehicles that are driven by the power of a rotating electrical machine are known. Such an automobile is equipped with a cooling structure for cooling electric devices such as a rotating electric machine, an inverter that controls the rotating electric machine, and a converter in addition to the radiator.

  This cooling structure is composed of a water jacket formed in a housing for storing electrical equipment, and a refrigerant passage formed by the water jacket and allowing the refrigerant to pass therethrough. And electric equipment is cooled by circulating a refrigerant with an electric pump etc. via a radiator etc. In order to increase the cooling efficiency, the refrigerant passage is stretched around the surface and the inside of a housing such as an electric device, an inverter and a converter, and has a complicated structure.

For example, Japanese Patent Application Laid-Open No. 10-148261 (Patent Document 1) discloses a technique in which a concave portion is provided on one of the mating surfaces and a sealing agent is formed to fit into the concave portion in a seal structure. Japanese Utility Model Publication No. 7-42405 (Patent Document 2) discloses a structure of a liquid packing reservoir in a water jacket. Japanese Patent Laying-Open No. 2001-263461 (Patent Document 3) discloses a water jacket for shifting a hybrid vehicle.
Japanese Patent Laid-Open No. 10-148261 Japanese Utility Model Publication No. 7-42405 JP 2001-263461 A

  However, in the conventional water jacket, a sealing agent (FIPG: Foam In Place Gaskets) for preventing leakage is applied between the cover of the water jacket and the water jacket to improve the sealing performance. However, in the conventional technique, for example, when a partition wall that divides a space is connected to an outer peripheral wall that surrounds a certain space, a sufficient seal structure cannot be formed at the connection portion between the outer peripheral wall and the partition wall. There was a problem. In addition, there is a problem that a reliable seal structure cannot be formed.

  Accordingly, the present invention has been made to solve the above-described problems, and provides a cooling structure for an electric device that can reliably prevent leakage of a refrigerant.

  A cooling structure for an electric device according to one aspect of the present invention is provided in a housing that stores an electric device for a vehicle, and cools the electric device. The cooling structure of the electrical equipment includes a jacket part provided in the casing, a cover that defines an internal space between the jacket part, and a sealant that is interposed between the jacket part and the cover to prevent refrigerant leakage. With. At least one of the jacket part and the cover has an outer peripheral wall that surrounds the internal space, and a partition wall that defines the refrigerant passage by partitioning the internal space. A recess is formed between the outer peripheral wall and the partition wall. The recess is filled with a sealant.

  In the cooling structure for an electric device configured as described above, a recess is formed between the outer peripheral wall and the partition wall, and the recess is filled with the sealant. Therefore, the concave portion becomes a sealant reservoir. Thereby, sufficient sealing agent can be supplied to this connection part, and the leakage of a refrigerant | coolant can be prevented.

Preferably, at least one of the jacket portion and the cover has an outer peripheral wall surrounding the inner space. The outer peripheral wall has a top surface facing the other of the jacket portion and the cover, and an inclined surface that is continuous with the top surface and is inclined with respect to the top surface so as to face the internal space. The sealant is in contact with the top surface and the inclined surface.

  In the cooling structure for an electric device configured as described above, an inclined surface that is inclined with respect to the top surface is formed so as to face the internal space, and the sealing agent is in contact with the top surface and the inclined surface. Compared to the case where the agent is in contact with only the top surface, the sealant contacts many surfaces. As a result, the area of the surface sealed with the sealing agent is increased, and leakage of the refrigerant can be prevented.

  According to this invention, it is possible to provide a cooling structure for an electric device that can reliably prevent leakage of refrigerant.

  Embodiments of the present invention will be described below with reference to the drawings. In the following embodiments, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

(Embodiment 1)
FIG. 1 is a diagram schematically showing the structure of a transaxle taking a hybrid vehicle as an example. Referring to FIG. 1, a transaxle 100 of a hybrid vehicle includes a motor generator (A) 102 (hereinafter referred to as MGA 102), a motor generator (B) 104 (hereinafter referred to as MGB 104), a shaft 106, The dividing mechanism 108, the speed reduction mechanism 110, the housing 112, the differential mechanism 114, and the drive shaft receiving portion 116 are configured. The MGA 102 and the MGB 104 are rotating electric machines having a function as an electric motor or a generator.

  The power output from the engine 200 transmitted to the shaft 106 is divided into two paths by the power split mechanism 108.

  One of the two paths is a path that is transmitted from the speed reduction mechanism 110 to the drive shaft receiving portion 116 via the differential mechanism 114. The driving force transmitted to the drive shaft receiving portion 116 is transmitted as a rotational force to the wheels (not shown) via the drive shaft (not shown), thereby causing the vehicle to travel. The power split mechanism 108 is realized by a planetary gear mechanism or the like.

  The other is a path for driving the MGA 102 to generate power. The MGA 102 generates power using the engine power distributed by the power split mechanism 108. The electric power generated by the MGA 102 is selectively used according to the running state of the vehicle and the state of the battery (not shown). For example, during normal running and sudden acceleration of the vehicle, the electric power generated by the MGA 102 becomes electric power for driving the MGB 104 as it is. On the other hand, under the conditions determined for the battery, the electric power generated by the MGA 102 is stored in the battery via an inverter and a converter (not shown).

  The MGB 104 is driven by at least one of the electric power stored in the battery and the electric power generated by the MGA 102. The driving force of the MGB 104 is transmitted from the speed reduction mechanism 110 to the drive shaft receiving portion 116 via the differential mechanism 114. In this way, the MGB 104 can assist the engine or drive the vehicle by the driving force from the MGB 104.

  On the other hand, during regenerative braking of the hybrid vehicle, the wheels are rotated by the inertial force of the vehicle body. The MGB 104 is driven through the drive shaft receiving portion 116, the differential mechanism 114, and the speed reduction mechanism 110 by the rotational force from the wheels. At this time, the MGB 104 operates as a generator. In this way, the MGB 104 acts as a regenerative brake that converts braking energy into electric power. The electric power generated by the MGB 104 is stored in the battery via the inverter.

  In the transaxle 100 of the hybrid vehicle configured as described above, the MGA 102 and the MGB 104 generate heat when the driving force as described above is generated and when power is generated. Further, the gears included in the power split mechanism 108 generate heat by driving. The heat generated in the MGA 102 and MGB 104 or the power split mechanism 108 is radiated to the housing 112 via oil or the like. At this time, if the housing 112 is not properly radiated, the components of the transaxle 100 provided in the housing 112 may be affected by heat deformation or seizure, which may cause failure. Therefore, in order to cool the housing 112 that has risen due to heat generation so as not to exceed a predetermined temperature, the housing 112 is provided with a jacket portion as a water jacket. The water jacket is formed with a refrigerant passage for circulating the refrigerant. The housing 112 can be cooled by circulating the refrigerant in the refrigerant passage through a radiator or the like using an electric pump, for example. In addition, although a refrigerant | coolant is not specifically limited, For example, cooling water, an antifreeze, LLC (long life coolant) etc. can be used.

  Further, as the MGB 104 that generates a driving force for mainly driving the vehicle, a rotating electrical machine having a larger output than the MGA 102 that generates electric power mainly based on power from the engine is used. Therefore, the heat generation amount in the MGB 104 is larger than the heat generation amount of the MGA 102. In other words, it is desirable that the refrigerant passage provided in the housing 112 is set so that the refrigerant passes at least from the MGB 104 to the MGA 102.

  FIG. 2 is a schematic diagram showing a cooling structure for a rotating electrical machine provided in a transaxle housing. Referring to FIG. 2, in electrical equipment cooling structure 1, water jacket 400 for cooling MGA 102 on the side close to engine 200, and water jacket 300 provided for cooling MGB 104 on the side far from engine 200, , Another water jacket 500 connected to the water jacket 400, water jacket covers 350, 450, 550 for sealing the water jacket, and a connection pipe 402 for connecting the water jacket 300 and the water jacket 400. Have. The refrigerant is introduced from the inlet 310 provided in the water jacket cover 350 and flows in the direction indicated by the arrow 701 in the refrigerant passage formed in the water jacket 300. Then, the refrigerant is introduced from the outlet of the water jacket 300 at a position lower than the inlet 310 into the refrigerant passage formed in the water jacket 400 via the connection pipe 402. The refrigerant flows through the refrigerant passage formed in the water jacket 400, temporarily flows into another water jacket 500, returns to the water jacket 400 again from the water jacket 500, and is discharged from the discharge port 410. The discharged refrigerant circulates through the refrigerant passage by an electric pump through a radiator, an inverter, a converter, and the like.

  Next, in the refrigerant passage formed by the water jacket, the path through which the refrigerant passes will be described in more detail with reference to FIG. As shown in FIG. 3A, a coolant passage 308 is formed in the water jacket 300 that cools the MGB 104. Formation of the refrigerant passage 308 is realized by dividing the internal space 325 of the water jacket 300 by using a partition wall 322. The refrigerant passage 308 is a flow path that is introduced in the horizontal direction at the upper portion of the water jacket 300 and led to the lower portion of the water jacket 300. The refrigerant passage 308 is bent from the lower part and guided in the upper direction, and is guided to the outlet provided at a position lower than the inlet. On the other hand, in the water jacket 400, refrigerant passages 408a and 408b are formed so as to be separated so as to form two passages flowing in the vertical direction. Connection holes 404 and 406 for connecting to a refrigerant passage 508 formed by a water jacket 500 provided at the bottom of the housing 112 of the transaxle 100 are provided at lower portions of the refrigerant passages 408a and 408b.

  The water jacket 500 is provided at the bottom of the housing 112 as shown in FIG. The refrigerant passage 508 formed by the water jacket 500 is partitioned so as to be a U-shaped passage. That is, the refrigerant introduced from the connection hole 404 is folded at the wall surface facing the connection hole 404 in the water jacket 500 and flows to the connection hole 406.

  The refrigerant introduced from the inlet in the water jacket 300 flows through the refrigerant passage 308 so as to go from the upper part to the lower part of the water jacket 300. And a refrigerant | coolant distribute | circulates from a lower part to an upper direction, and is guide | induced to the outflow port of the water jacket 300 of a position lower than an inflow port. The refrigerant guided to the outlet is introduced into the refrigerant passage 408a through the connection pipe 402. The introduced refrigerant passes through the refrigerant passage 408a and flows from the upper part of the water jacket 400 to the lower part. Then, the refrigerant is introduced into the refrigerant passage 508 from the connection hole 404 below the water jacket 400. As shown in FIG. 3B, the refrigerant introduced from the connection hole 404 passes through the refrigerant passage 508 and is introduced from the connection hole 406 to the refrigerant passage 408b. Then, the water is discharged from the outlet of the water jacket 400 through the refrigerant passage 408b.

  The water jacket 300 has an outer peripheral wall 321 that surrounds the internal space 325. The surface of the outer peripheral wall 321 has a substantially flat shape. A sealant (not shown) is applied to the outer peripheral wall 321, and the outer peripheral wall 321 comes into contact with the water jacket cover 350 by interposing this sealant therebetween. The internal space 325 is “L” -shaped, and an “L” -shaped partition wall 322 is provided at the center thereof. The partition wall 322 is for increasing the total length of the refrigerant passage 308 formed in the internal space 325. When the refrigerant flows in the direction indicated by the arrow 701 in the refrigerant passage 308 for a long period of time, the refrigerant heats the housing 112. Can be removed. Between the outer peripheral wall 321 and the partition wall 322, concave portions 323a and 323b are formed as gaps. The recesses 323a and 323b are lower in height than the partition wall 322. Therefore, the sealant is positively accumulated in the recesses 323a and 323b. The recesses 323a and 323b are provided at a connection portion between the outer peripheral wall 321 and the partition wall 322. The reason is that the sealant is difficult to accumulate in this portion. Also in the water jacket 400, recesses 423 a and 423 b are provided between the outer peripheral wall 421 and the partition wall 422. In the water jacket 400, the partition wall 422 is provided so as to divide the internal space 425 into two substantially, a refrigerant passage 408a is formed on the right side, and a refrigerant passage 408b is formed on the left side. The reason why the partition wall 422 divides the internal space into two in the water jacket 400 is that the connection holes 404 and 406 are connected to each other via the water jacket 500. The recesses 423a and 423b have a structure in which a sealant accumulates. Also in the water jacket 500, an internal space 525 is formed in a region surrounded by the outer peripheral wall 521, and a partition wall 522 is formed so as to divide the internal space 525. A refrigerant passage 508 is formed by being partitioned by the partition wall 522. A recess 523 a is formed between the partition wall 522 and the outer peripheral wall 521.

  Since the refrigerant passage provided in the housing 112 of the transaxle 100 passes through a radiator, an inverter, or the like, the setting of the passage of the refrigerant passage is limited. It is also necessary to avoid components such as sensors and connectors formed on the transaxle 100. In particular, as described above, when the path of the refrigerant passage is set so that at least the MGB 104 is cooled before the MBA 102, the inlet is higher than the outlet of the refrigerant passage 308, as shown in FIG. May be a position. Since the refrigerant introduced from the inflow port is gradually filled from the lower part of the water jacket 300, air is likely to be generated as compared with the case where the inflow port is at a position lower than the outflow port. Further, the MGA 102 and the MGB 104 to be cooled are substantially cylindrical. Therefore, the housing 112 for storing the MGA 102 and the MGB 104 is also formed in a substantially cylindrical shape in order to efficiently release the heat generated in the MGA 102 and the MGB 104 to the outside.

  FIG. 4 is a diagram showing a path of the cooling structure of the motor generator (B). Referring to FIG. 4, water jacket cover 350 seals refrigerant passage 308 formed inside water jacket 300 by fastening a plurality of bolts 304 to water jacket 300. The refrigerant 700 is introduced from the inlet 310 at the top of the water jacket 300. Then, the introduced refrigerant 700 goes around from the upper part to the lower part. Then, the refrigerant 700 flows from the lower part to the upper part and is guided to the outlet at a position lower than the inlet 310. Thereafter, the refrigerant 700 flows from the outlet to the water jacket 400 via the connection pipe 402.

  FIG. 5 is a front view of the water jacket cover 350 viewed from the direction indicated by the arrow V in FIG. FIG. 6 is a side view of the water jacket cover 350 as seen from the direction indicated by the arrow VI in FIG. FIG. 7 is a rear view of the water jacket cover 350 as seen from the direction indicated by the arrow VII in FIG. 5 to 7, the water jacket cover 350 has an inlet 310 for introducing a refrigerant. Further, the water jacket cover 350 has an outer peripheral wall 371 that surrounds the internal space 325. An “L” -shaped internal space 325 surrounded by the outer peripheral wall 371 is divided by a partition wall 372. A recess 373 a is provided between the partition wall 372 and the outer peripheral wall 371. The outer peripheral wall 371 faces the outer peripheral wall 321 of the water jacket 300 and is connected to each other through a sealant. The partition wall 372 faces the partition wall 322 of the water jacket 300. The recess 373a faces the recess 323a of the water jacket 300, and a sealant is stored in the recess 373a.

  FIG. 8 is a front view of the water jacket cover 450 as seen from the direction indicated by the arrow VIII in FIG. FIG. 9 is a side view of the water jacket cover 450 as seen from the direction indicated by the arrow IX in FIG. FIG. 10 is a rear view of the water jacket cover 450 as viewed from the direction indicated by the arrow X in FIG. With reference to FIGS. 8 to 10, the water jacket cover 450 has a discharge port 410 for discharging the refrigerant. The refrigerant discharged from the outlet 410 is cooled via the heat exchanger and flows into the inlet 310 again. An internal space 425 is provided so as to be continuous with the discharge port 410. The internal space 425 is an area surrounded by the outer peripheral wall 471, and the internal space 425 is divided by the partition wall 472. A recess 473a is formed between the partition wall 472 and the outer peripheral wall 471, and the recess 473a is filled with a sealing agent. The heights of the outer peripheral wall 471 and the partition wall 472 are substantially equal. The partition wall 472 is positioned so as to substantially face the partition wall 422 of the water jacket 400.

  FIG. 11 is a front view of the water jacket cover 550 viewed from the direction indicated by the arrow XI in FIG. FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. FIG. 13 is a rear view of the water jacket cover 550 viewed from the direction indicated by the arrow XIII in FIG. Referring to FIGS. 11 to 13, the water jacket cover 550 has a drain plug 500D. The drain plug 500D is used when the refrigerant is replaced, and the refrigerant in the water jacket 300, 400, 500 can be discharged by opening the drain plug 500D. A space surrounded by the outer peripheral wall 571 is an internal space 525, and a partition wall 572 is provided so as to divide the internal space 525. The outer peripheral wall 571 faces the outer peripheral wall 521 of the water jacket 500 via a sealant. Further, the partition wall 572 faces the partition wall 522 of the water jacket 500. Between the partition wall 572 and the outer peripheral wall 571, a recess 573a is provided as a sealant reservoir.

  14 is a cross-sectional view taken along XIV-XIV in FIG. In FIG. 14, a sealant is applied to the outer peripheral wall 321 and the partition wall 322 shown in FIG. 3, and the water jacket cover 350 is disposed with the sealant interposed therebetween. Referring to FIG. 14, a recess 323 a is provided between the outer peripheral wall 321 and the partition wall 322 of the water jacket 300. The recess 323a is filled with a sealant 600 as packing. The water jacket cover 350 is also provided with a recess 373a. The recess 373a is located between the outer peripheral wall 371 and the partition wall 372, and becomes a space in which the sealant 600 is accumulated. The recess 323a and the recess 373a are disposed so as to face each other. In this embodiment, the recesses 323a and 373a are formed in both the water jacket 300 and the water jacket cover 350, but the recesses may be formed in only one of them. Further, the shape of the recesses 323a and 373a is not limited to a rectangular shape, and can be various shapes such as a semicircular shape and a semielliptical shape.

  FIG. 15 is a perspective view for explaining a recess according to the first embodiment. Referring to FIG. 15, a partition wall 322 is provided so as to divide the internal space 325. The internal space 325 is surrounded by the outer peripheral wall 321, and concave portions 323 a and 323 b are disposed between the partition wall 322 and the outer peripheral wall 321.

  In the cooling structure according to the present invention as described above, there is provided a cooling structure for the housing 112 as a housing for storing the MGA 102 and the MGB 104 as the vehicle electrical equipment. The cooling structure 1 of the electric device is a cover that defines internal spaces 325, 425, and 525 between the water jackets 300, 400, and 500 as jacket portions provided in the housing 112 and the water jackets 300, 400, and 500. Water jacket covers 350, 450, and 550, and a sealant 600 that is interposed between the water jackets 300, 400, and 500 and the water jacket covers 350, 450, and 550 and prevents leakage of the refrigerant 700. At least one of the jacket part and the cover includes outer peripheral walls 321, 371, 421, 471, 521, 571 surrounding the internal space, and partition walls 322, 372, 422, 472 that define the refrigerant passage by partitioning the internal space. 522, 572. Concave portions 323a, 373a, 423a, 473a, 523a, and 573a are formed between the outer peripheral wall and the partition wall. The recess 600 is filled with the sealing agent 600.

  In the cooling structure configured as described above, the recess as the notch serves as a portion where the sealant is accumulated, so that the sealant can be reliably held at this portion. As a result, refrigerant leakage can be prevented.

  In this embodiment, the internal space is provided in both the water jacket and the water jacket cover. However, the present invention is not limited to this, and the internal space may be formed only in one of them. That is, for example, the water jacket covers 350, 450, and 550 have a flat plate shape, and the internal space provided in the water jackets 300, 400, and 500 may be sealed using the water jacket covers 350, 450, and 550. . In this case, the outer peripheral walls 371, 471, 571 and the partition walls 372, 472, 572 are not formed on the water jacket covers 350, 450, 550. Further, no recess is formed in the water jacket covers 350, 450, 550.

  On the contrary, it is not necessary to form an internal space in the water jacket 300, 400, 500. In this case, internal spaces 325, 425, 525 are formed only in the water jacket covers 350, 450, 550.

(Embodiment 2)
FIG. 16 is a diagram for illustrating a cooling structure for an electric device according to the second embodiment of the present invention. Referring to FIG. 16, in the cooling structure for an electric device according to the second embodiment of the present invention, the first embodiment is the same in that inclined surfaces 421 b are provided on outer peripheral walls 321, 421 and 521. Different from the cooling structure of electrical equipment. Referring to FIG. 16, in the cooling structure for an electric device according to the second embodiment of the present invention, outer peripheral walls 321, 421, 521 are top surfaces 321 a, 421 a, 521 a facing water jacket covers 350, 450, 550. And inclined surfaces 321b, 421b, 521b that are inclined with respect to the top surfaces 321a, 421a, 521a and face the internal spaces 325, 425, 525.

  17 is a cross-sectional view taken along line XVII-XVII in FIG. In FIG. 17, a water jacket cover 350 is provided on the outer peripheral wall 321 with a sealant 600 interposed therebetween. The sealant 600 is in contact with both the top surfaces 321a, 421a, 521a and the inclined surfaces 321b, 421b, 521b.

  In the structure shown in FIG. 17, the water jacket cover 350 has a flat plate shape and the internal space 325 is mainly formed by the water jacket 300. However, the present invention is not limited to this, and the water jacket cover 350 has a concave portion. And the inner space 325 may be constituted by the recess. Further, in this embodiment, the inclined surface 321b as a chamfered portion is formed on all three water jackets 300, 400, 500, but only one of the water jackets 300, 400, 500 is inclined. 321b, 421b, and 521b may be provided. Further, the water jacket covers 350, 450, and 550 may be provided with a top surface and an inclined surface that is inclined with respect to the top surface. The inclined surfaces 321b, 421b, and 521b are provided so as to be surrounded by the top surfaces 321a, 421a, and 521a, that is, in a region inside the top surfaces 321a, 421a, and 521a. The electric device cooling structure 1 according to the second embodiment of the present invention configured as described above has the same effect as the electric device cooling structure according to the first embodiment.

(Embodiment 3)
FIG. 18 is a cross-sectional view for illustrating a cooling structure for an electric device according to the third embodiment of the present invention. Referring to FIG. 18, in the cooling structure for an electric device according to the third embodiment of the present invention, water jacket 300 and water jacket cover 350 have outer peripheral walls 321 and 371 that surround inner space 325, respectively. The outer peripheral walls 321 and 371 have top surfaces 321a and 371a facing the mating member. The width of the top surface 321a is different from the width of the top surface 371a. The width W1 of the top surface 321a is smaller than the width W2 of the top surface 371a. Thus, by changing the size of the mating surface up and down, electric device cooling structure 1 according to Embodiment 3 of the present invention is configured. The sealant 600 is provided so as to protrude from the narrow top surface 321a due to the different widths. Sealing agent 600 is arranged to flow into internal space 325. That is, the wide top surface 371a is disposed so as to protrude toward the internal space 325 side. In this embodiment, the width of the top surface on the water jacket 300 side is reduced. However, the width is not limited to this, and the width on the water jacket cover 350 side may be reduced. The electric device cooling structure according to the third embodiment of the present invention configured as described above has the same effect as the electric device cooling structure according to the first and second embodiments.

  As mentioned above, although embodiment of this invention was described, this embodiment can be variously deformed. First, a motor generator is shown as an electric device, but the present invention is not limited to this, and the present invention can be applied in the field of cooling an electric device such as an inverter or a converter. Furthermore, although the structure with two motor generators is shown, the structure with one motor generator may be used. Further, the number of recesses provided in the water jackets 300, 400, 500 and the water jacket covers 350, 450, 550 is not limited to that shown in the embodiment. Further, the concave portion may be provided in any one of the water jackets 300, 400, 500 and the water jacket covers 350, 450, 550, or may be provided in both.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The present invention can be used in the field of a structure for cooling an electric device mounted on a vehicle.

It is a figure which shows roughly the structure of the transaxle which made a hybrid vehicle an example. It is the schematic which shows the cooling structure of the rotary electric machine provided in the housing of the transaxle. It is a figure which shows the path | route of the cooling structure of the rotary electric machine provided in the housing of the transaxle. It is a figure which shows the path | route of the cooling structure of a motor generator (B). It is a front view of the water jacket cover 350 seen from the direction shown by the arrow V in FIG. FIG. 6 is a side view of the water jacket cover 350 as seen from the direction indicated by the arrow VI in FIG. 5. It is a rear view of the water jacket cover 350 seen from the direction shown by the arrow VII in FIG. FIG. 5 is a front view of a water jacket cover 450 as viewed from the direction indicated by an arrow VIII in FIG. 2. It is a side view of the water jacket cover 450 seen from the direction shown by the arrow IX in FIG. FIG. 10 is a rear view of the water jacket cover 450 as viewed from the direction indicated by the arrow X in FIG. 9. It is the front view of the water jacket cover 550 seen from the direction shown by arrow XI in FIG. It is sectional drawing along the XII-XII line | wire in FIG. It is a rear view of the water jacket cover 550 seen from the direction shown by the arrow XIII in FIG. FIG. 4 is a cross-sectional view taken along line XIV-XIV in FIG. 3. FIG. 6 is a perspective view for explaining a recess according to the first embodiment. It is a figure for demonstrating the cooling structure of the electric equipment according to Embodiment 2 of this invention. It is sectional drawing along the XVII-XVII line | wire in FIG. It is sectional drawing for demonstrating the cooling structure of the electric equipment according to Embodiment 3 of this invention.

Explanation of symbols

  1 Cooling structure of electrical equipment, 100 transaxle, 106 shaft, 108 power split mechanism, 110 speed reduction mechanism, 112 housing, 114 differential mechanism, 200 engine, 300,400,500 water jacket, 321,371,421,471,521 , 571 Outer wall, 322, 372, 422, 472, 522, 572 Partition wall, 323a, 373a, 423a, 473a, 523a, 573a Recess, 325, 425, 525 Internal space, 350, 450, 550 Water jacket cover.

Claims (2)

A cooling structure that is provided in a housing that stores electrical equipment for a vehicle and that cools the electrical equipment,
A jacket provided in the housing;
A cover that defines an internal space between the jacket portion,
A sealant interposed between the jacket portion and the cover to prevent refrigerant leakage;
At least one of the jacket part and the cover has an outer peripheral wall that surrounds an internal space, and a partition wall that forms a refrigerant passage by partitioning the internal space,
A recess is formed between the outer peripheral wall and the partition wall,
A cooling structure for an electric device, wherein the recess is filled with the sealant.   At least one of the jacket part and the cover has an outer peripheral wall surrounding an inner space, the outer peripheral wall is connected to the top surface facing the other of the jacket part and the cover, and is connected to the top surface. 2. The cooling structure for an electric device according to claim 1, wherein the sealing agent is in contact with the top surface and the inclined surface.

Images