JP6904070B2 - Power converter - Google Patents

Description

The present invention relates to a power conversion device including a cooler having a refrigerant flow path.

As a cooler used in a power conversion device such as an inverter, for example, there is one disclosed in Patent Document 1. In the power conversion device described in Patent Document 1, a part of the case accommodating the power conversion circuit constitutes a cooler. In the power conversion device, the case has a recess that opens toward the outside of the case and a cover that closes the recess. The space between the recess and the cover is a refrigerant flow path through which the refrigerant can flow. In the power conversion device, a sealing material such as a liquid gasket is arranged between the recess and the cover in order to ensure the sealing property between the recess and the cover.

Japanese Unexamined Patent Publication No. 2015-033289

However, in the power conversion device described in Patent Document 1, for example, when a part of the sealing material is formed so as to protrude into the refrigerant flow path, the portion of the sealing material that protrudes into the refrigerant flow path receives the force of the refrigerant and seals. It may be broken from the material and flowed into the refrigerant. In such a case, there is a concern that the pieces of the sealing material broken from the sealing material may clog the refrigerant flow path and increase the pressure loss of the refrigerant. If the pressure loss of the refrigerant increases, the flow of the refrigerant in the refrigerant flow path deteriorates, and the cooling performance of the cooler may deteriorate.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a power conversion device that can easily prevent an increase in pressure loss of a refrigerant flowing through a refrigerant flow path.

One aspect of the present invention includes a cooler (10) having a refrigerant flow path (100) through which a refrigerant can flow and a flow path forming portion (2) forming the refrigerant flow path inside.
The flow path forming portion includes a pair of sealing surfaces (223, 231 ) facing each other and a sealing material (3) that seals between the pair of sealing surfaces in the opposite direction (Z) of the pair of sealing surfaces. Have,
The seal arrangement region (4), which is a region between the pair of seal surfaces in the facing direction, is the facing direction in the direction from the side facing the refrigerant flow path to the side facing the outside of the cooler. Has multiple regions of different sizes
Wherein the plurality of regions, the inner peripheral end region (41) is a region facing the refrigerant flow path, the cooler the outer peripheral edge area which is an area that faces the outside of the (42), the inner peripheral end region A large spacing region (43), which is a region between the outer peripheral edge region and the outer peripheral edge region, is included.
Said sealing arrangement region, the length of the opposite direction (L1) the length of the facing direction of the outer peripheral edge region of the inner peripheral edge region (L2) much larger than the, and, the opposite of the large interval area The length (L3) in the direction is configured to be larger than either the length of the inner peripheral end region in the opposite direction and the length of the outer peripheral end region in the opposite direction.
It is in the power conversion device (1) in which the seal material is arranged as a whole of the inner peripheral end region, the outer peripheral end region, and the large interval region of the seal arrangement region.

In the power conversion device, the length of the inner peripheral end region of the seal arrangement region in the facing direction is larger than the length of the outer peripheral end region in the facing direction. Therefore, the thickness of the portion of the sealing material arranged in the inner peripheral end region is larger than that of the portion arranged in the outer peripheral end region in the opposite direction. Therefore, even if a part of the sealing material is formed so as to protrude into the refrigerant flow path, the portion of the sealing material that protrudes into the refrigerant flow path and the portion that fits in the seal arrangement area of the sealing material. The area of the boundary becomes large. Therefore, even if a part of the sealing material is formed so as to protrude into the refrigerant flow path, the part of the sealing material is unlikely to be broken. Therefore, it is easy to prevent an increase in the pressure loss of the refrigerant.

As described above, according to the above aspect, it is possible to provide a power conversion device that can easily prevent an increase in pressure loss of the refrigerant flowing through the refrigerant flow path.
The reference numerals in parentheses described in the scope of claims and the means for solving the problem indicate the correspondence with the specific means described in the embodiments described later, and limit the technical scope of the present invention. It's not a thing.

The perspective view of the cooler in Embodiment 1. An exploded perspective view of the cooler according to the first embodiment. The plan view of the main body of a cooler according to Embodiment 1. FIG. 5 is an enlarged cross-sectional view of a cooler according to the first embodiment, which is parallel to the pair of seal surfaces in the opposite direction and passes through the inner peripheral end region and the outer peripheral end region of the seal arrangement region. FIG. 5 is an enlarged cross-sectional view showing a state in which the sealing material is formed so as to protrude into the refrigerant flow path in the first embodiment. An enlarged cross-sectional view showing a state in which the sealing material is formed so as to protrude into the refrigerant flow path in the comparative form. An enlarged cross-sectional view showing a state in which a part of the sealing material is broken in the comparative form. FIG. 3 is an enlarged cross-sectional view of a cooler in a modified form of the first embodiment, which is parallel to a pair of seal surfaces in a facing direction and passes through an inner peripheral end region and an outer peripheral end region of a seal arrangement region. An enlarged cross-sectional view of a cooler in another modified embodiment of the first embodiment, which is parallel to the facing direction of the pair of seal surfaces and passes through the inner peripheral end region and the outer peripheral end region of the seal arrangement region. An enlarged cross-sectional view of a cooler in still another modification of the first embodiment, which is parallel to the facing direction of the pair of seal surfaces and passes through the inner peripheral end region and the outer peripheral end region of the seal arrangement region. The plan view of the power conversion apparatus in Embodiment 2. FIG. 5 is a side view of the power conversion device according to the third embodiment. The plan view of the laminated body in Embodiment 3. FIG. 3 is a cross-sectional view of a laminated body orthogonal to the vertical direction in the third embodiment. The side view of the laminated body in Embodiment 3.

(Embodiment 1)
An embodiment of the power conversion device will be described with reference to FIGS. 1 to 5.
As shown in FIGS. 1 and 2, the power conversion device 1 of the present embodiment is a cooler having a refrigerant flow path 100 through which a refrigerant can flow and a flow path forming portion 2 forming a refrigerant flow path 100 inside. 10. As shown in FIG. 4, the flow path forming portion 2 has a pair of sealing surfaces facing each other and a sealing material 3 for sealing between the pair of sealing surfaces in the opposite direction Z of the pair of sealing surfaces. In the present embodiment, the pair of sealing surfaces are the upper surface 223 of the side plate 22 and the lid-side facing surface 231 of the lid plate 23, which will be described later. In the present embodiment, the facing direction Z of the pair of sealing surfaces is referred to as the vertical direction Z for convenience.

The seal arrangement region 4, which is a region between the pair of seal surfaces in the vertical direction Z, has a size in the vertical direction Z in the direction from the side facing the refrigerant flow path 100 to the side facing the outside of the cooler 10. Has a plurality of different regions. Here, among the plurality of regions, the region facing the refrigerant flow path 100 is defined as the inner peripheral end region 41, and the region facing the outside of the cooler 10 is defined as the outer peripheral end region 42. At this time, the length L1 of the inner peripheral end region 41 in the vertical direction Z is larger than the length L2 of the outer peripheral end region 42 in the vertical direction Z. In FIG. 1, the sealing material 3 is not shown.

The power conversion device 1 performs power conversion between DC power and AC power. The power conversion device 1 is configured to perform power conversion between a DC power supply and a three-phase AC rotary electric machine. In the present embodiment, the power conversion device 1 is mounted on a vehicle such as an electric vehicle or a hybrid vehicle. The cooler 10 is used to cool the components of the power conversion device 1 such as a reactor. Although not shown, the cooler 10 is arranged so that a reactor or the like is in thermal contact with the cooler 10.

As shown in FIG. 2, the flow path forming portion 2 of the cooler 10 is a main body portion 20 having a bottom plate 21 and a side plate 22 erected on one side in the vertical direction Z from the peripheral edge of the bottom plate 21, and the main body portion 20. It has a lid plate 23 that closes the opening. The region inside the flow path forming portion 2 is the refrigerant flow path 100. Hereinafter, in the vertical direction Z, the side on which the side plate 22 is erected from the bottom plate 21 is referred to as the upper side, and the opposite side thereof is referred to as the lower side. Further, in FIG. 2, the detailed shape of the upper surface 223 of the side plate 22 is omitted, and the region of the upper surface 223 where the sealing material 3 is arranged is hatched.

As shown in FIGS. 2 and 3, the bottom plate 21 of the main body 20 has a rectangular plate shape. The side plate 22 is erected on the upper side from the four sides of the peripheral edge of the bottom plate 21. The side plates 22 include a pair of first side plates 221 facing the vertical direction X orthogonal to the vertical direction Z, and a pair of second side plates 222 facing the horizontal direction Y orthogonal to both the vertical direction Z and the vertical direction X. Have. Each of the pair of first side plates 221 is formed with a through hole penetrating in the vertical direction X. An introduction pipe 24 for introducing the refrigerant from the outside to the inside of the cooler 10 is connected to one of the pair of first side plates 221 and the refrigerant is introduced from the inside to the outside of the cooler 10 to the other. A discharge pipe 25 for discharging is connected. That is, the cooler 10 is configured so that the refrigerant flows from the introduction pipe 24 side in the vertical direction X toward the discharge pipe 25 side.

As shown in FIGS. 1 and 2, the lid plate 23 has a rectangular plate shape. The lid plate 23 closes the opening on the upper side of the main body 20. As shown in FIG. 4, the lid plate 23 is arranged so as to cover the entire upper surface 223 of the four side plates 22 from above. That is, the lid plate 23 has a lid-side facing surface 231 facing the entire upper surface 223 of the four side plates 22 in the vertical direction Z.

The region between the upper surface 223 of the side plate 22 and the lid-side facing surface 231 of the lid plate 23 in the vertical direction Z is the seal arrangement region 4 described above. Then, the seal material 3 is arranged in the entire seal arrangement area 4. The sealing material 3 is arranged so as to be in close contact with both the entire upper surface 223 of the side plate 22 and the entire lid-side facing surface 231 and seal between them. In this embodiment, the sealing material 3 is a liquid gasket.

Of the pair of sealing surfaces, one has a planar shape and the other has an uneven shape. In the present embodiment, the lid-side facing surface 231 of the lid plate 23 has a planar shape orthogonal to the vertical direction Z, and the upper surface 223 of the side plate 22 has an uneven shape. As shown in FIG. 4, the upper surface 223 of the side plate 22 has three surfaces, an inner peripheral upper surface 223a, an intermediate upper surface 223c, and an outer peripheral upper surface 223b, which are positioned differently from each other in the vertical direction Z. As shown in FIG. 3, the inner peripheral upper surface 223a is continuously formed over the entire circumference of the upper surface 223 of the side plate 22 at the inner peripheral end portion of the upper surface 223 of the side plate 22. Further, the outer peripheral upper surface 223b is continuously formed at the outer peripheral end portion of the upper surface 223 of the side plate 22 over the entire circumference of the upper surface 223 of the side plate 22. When viewed from the vertical direction Z, the intermediate upper surface 223c is continuously formed between the inner peripheral upper surface 223a and the outer peripheral upper surface 223b over the entire circumference of the upper surface 223 of the side plate 22. Each of the inner peripheral upper surface 223a, the intermediate upper surface 223c, and the outer peripheral upper surface 223b is formed in a plane shape orthogonal to the vertical direction Z.

The seal arrangement region 4 has an inner peripheral end region 41 between the inner peripheral upper surface 223a and the lid-side facing surface 231 in the vertical direction Z. Further, the seal arrangement region 4 has an outer peripheral end region 42 between the outer peripheral upper surface 223b and the lid side facing surface 231 in the vertical direction Z. Further, the seal arrangement region 4 has a large spacing region 43 described later between the intermediate upper surface 223c and the lid side facing surface 231 in the vertical direction Z.

As shown in FIG. 4, the inner peripheral upper surface 223a is located below the outer peripheral upper surface 223b. As a result, the length L1 of the inner peripheral end region 41 in the vertical direction Z is larger than the length L2 of the outer peripheral end region 42 in the vertical direction Z.

Further, the seal arrangement region 4 covers at least a part of the region between the inner peripheral end region 41 and the outer peripheral end region 42, the length L1 in the vertical direction Z of the inner peripheral end region 41 and the vertical direction of the outer peripheral end region 42. It has a large spacing region 43 having a length L3 in the vertical direction Z that is larger than any of the length L2 of Z. As described above, in the present embodiment, the region between the intermediate upper surface 223c and the lid-side facing surface 231 in the vertical direction Z is the large spacing region 43. The intermediate upper surface 223c is located below both the inner peripheral upper surface 223a and the outer peripheral upper surface 223b. As a result, the length L3 in the vertical direction Z of the large interval region 43 is larger than both the length L1 in the vertical direction Z of the inner peripheral end region 41 and the length L2 in the vertical direction Z of the outer peripheral end region 42. It has become.

The seal material 3 has substantially the same shape as the seal arrangement area 4. In the sealing material 3, the length of the portion arranged in the inner peripheral end region 41 of the seal arrangement region 4 in the vertical direction Z is larger than the length of the portion arranged in the outer peripheral end region 42 in the vertical direction Z. Further, in the sealing material 3, the length of the portion arranged in the large interval region 43 in the vertical direction Z is the length of the portion arranged in the outer peripheral end region 42 in the vertical direction Z, and the length of the portion arranged in the outer peripheral end region 42 is arranged in the inner peripheral end region 41. It is larger than any of the vertical Z lengths of the formed parts.

Next, the action and effect of this embodiment will be described.
In the power conversion device 1, the length of the inner peripheral end region 41 of the seal arrangement region 4 in the vertical direction Z is larger than the length of the outer peripheral end region 42 in the vertical direction Z. Therefore, in the sealing material 3, the portion arranged in the inner peripheral end region 41 is thicker in the vertical direction Z than the portion arranged in the outer peripheral end region 42. Therefore, as shown in FIG. 5, even if a part of the sealing material 3 is formed so as to protrude into the refrigerant flow path 100, the portion 34 of the sealing material 3 protruding into the refrigerant flow path 100 and the portion 34. The area of the boundary 35 with the portion of the sealing material 3 that fits in the seal arrangement area 4 becomes large. Therefore, even if a part of the sealing material 3 is formed so as to protrude into the refrigerant flow path 100, the part of the sealing material 3 is unlikely to be broken.

Here, as shown in FIG. 6, consider a case where the length of the entire seal arrangement region 4 in the vertical direction Z is reduced to the same extent as the length of the outer peripheral end region 42 shown in the present embodiment in the vertical direction Z. In this case, when a part of the sealing material 3 is formed so as to protrude into the refrigerant flow path 100, the portion 93 protruding into the refrigerant flow path 100 in the sealing material 3 and the portion housed in the seal arrangement area 4 in the sealing material 3. The area of the boundary 95 with is small. Therefore, the protruding portion 93 of the sealing material 3 has a weak bonding force with the portion of the sealing material 3 that fits within the seal arrangement region 4. Therefore, as shown in FIG. 7, there is a concern that the protruding portion 93 of the sealing material 3 may be broken from the portion of the sealing material 3 that fits within the seal arrangement region 4 and flow into the refrigerant.

On the other hand, as shown in FIG. 5, in the power conversion device 1 of the present embodiment, as described above, even when a part of the sealing material 3 is formed so as to protrude into the refrigerant flow path 100, the refrigerant in the sealing material 3 Since the area of the portion protruding into the flow path 100 and the portion of the sealing material 3 that fits in the seal arrangement region 4 becomes large, it is difficult for the refrigerant to flow. Therefore, the power conversion device 1 of the present embodiment can easily prevent an increase in the pressure loss of the refrigerant. Further, by preventing the pressure loss of the refrigerant from increasing, the flow of the refrigerant in the cooler 10 can be improved, and the cooling performance of the cooler 10 can be easily improved. Further, it is easy to miniaturize the cooler 10 while sufficiently ensuring the cooling performance of the cooler 10. Along with this, the power conversion device 1 as a whole can be miniaturized.

Further, the seal arrangement region 4 covers at least a part of the region between the inner peripheral end region 41 and the outer peripheral end region 42, the length L1 in the vertical direction Z of the inner peripheral end region 41 and the vertical direction of the outer peripheral end region 42. It has a large spacing region 43 having a length L3 in the vertical direction Z that is larger than any of the length L2 of Z. Therefore, even if the sealing material 3 is broken in the region from the outer peripheral end region 42 to the large spacing region 43 (for example, the boundary portion between the large spacing region 43 and the outer peripheral end region 42), even if the sealing material 3 is broken. Since the broken sealing material 3 is caught by the flow path forming portion 2 in the large interval region 43 and the inner peripheral end region 41, it is not flowed by the refrigerant flowing through the refrigerant flow path 100.

Further, of the pair of sealing surfaces, one has a planar shape and the other has an uneven shape. Therefore, by processing one sealing surface (upper surface 223 of the side plate 22 in this embodiment), the present embodiment does not require processing of the other sealing surface (cover side facing surface 231 in this embodiment). The seal arrangement region 4 having a shape can be easily formed.

The sealing material 3 is a liquid gasket. Therefore, the sealing material 3 can be easily arranged between the pair of sealing surfaces in the flow path forming portion 2. Therefore, it is easy to improve the productivity of the power conversion device 1.

Further, the power conversion device 1 is mounted on a vehicle and used. As described above, since the power conversion device 1 of the present embodiment can be miniaturized, it is easy to improve the degree of freedom in arranging the power conversion device 1 in the vehicle.

As described above, according to the present embodiment, it is possible to provide a power conversion device that can easily prevent an increase in pressure loss of the refrigerant flowing through the refrigerant flow path.

In the present embodiment, one of the pair of sealing surfaces has a planar shape and the other has an uneven shape. However, as shown in FIG. 8, both of the pair of sealing surfaces have an uneven shape. By providing it, it is also possible to form the seal arrangement region 4 shown in the first embodiment. The power conversion device 1 shown in FIG. 8 has a convex surface 231a projecting downward at the outer peripheral end of the lid-side facing surface 231 of the lid plate 23, and projects upward to the inner peripheral end of the upper surface 223 of the side plate 22. It has a convex surface 223d.

Further, in the present embodiment, the sealing material 3 is arranged on the pair of sealing surfaces formed in the flow path forming portion 2 forming one refrigerant flow path 100, but the present invention is not limited to this, and for example, As shown in FIG. 9, in the two flow path forming portions 2a and 2b connecting the two refrigerant flow paths 100a and 100b, the surfaces of the two flow path forming portions 2a and 2b facing each other are designated as sealing surfaces. The region between them may be the seal arrangement region 4 shown in the first embodiment.

Further, in the present embodiment, the large interval region 43 is formed in the seal arrangement region 4, but the large interval region 43 may not be formed in the seal arrangement region 4. For example, as shown in FIG. 4, in the first embodiment, the intermediate upper surface 223c of the side plate 22 is located below the inner peripheral upper surface 223a, but the intermediate upper surface 223c and the inner peripheral upper surface 223a shown in the first embodiment are located. It is also possible to adopt a configuration formed flush with each other as shown in FIG.

(Embodiment 2)
In this embodiment, as shown in FIG. 11, a downstream cooling unit 5 that cools a component different from the component cooled by the cooler 10 on the downstream side in the refrigerant flow direction in the refrigerant flow path 100 shown in the first embodiment. Is an embodiment in which is arranged. In FIG. 11, the direction in which the refrigerant flows is indicated by an arrow. The downstream cooling unit 5 includes a downstream flow path 50 communicating with the refrigerant flow path 100. The component to be cooled that the downstream cooling unit 5 cools is a semiconductor module having a built-in semiconductor element. The semiconductor element can be a switching element such as an IGBT (that is, an insulated gate bipolar transistor) or a MOSFET (MOS type field effect transistor). The semiconductor module is made by molding a semiconductor element with a resin. The semiconductor module is connected to each of the U-phase electrode, the V-phase electrode, and the W-phase electrode of the three-phase AC rotary electric machine. The downstream cooling unit 5 preferably has the same configuration as the cooler 10 shown in the first embodiment, but may not have the same configuration.

Others are the same as in the first embodiment.
In addition, among the codes used in the second and subsequent embodiments, the same codes as those used in the above-described embodiments represent the same components and the like as those in the above-mentioned embodiments, unless otherwise specified.

In the present embodiment, it has a downstream cooling unit 5 arranged on the downstream side of the cooler 10. As described above, since the cooler 10 can easily prevent the fragments of the sealing material 3 from flowing to the downstream side, the sealing material 3 of the cooler 10 is attached to the downstream cooling unit 5 arranged on the downstream side of the cooler 10. It is possible to prevent the debris from being clogged. Therefore, the cooling performance of the downstream cooling unit 5 can also be improved.

The component to be cooled that the downstream cooling unit 5 cools is a semiconductor module having a built-in semiconductor element. In the present embodiment, as described above, the cooling performance of the downstream cooling unit 5 can be improved. Therefore, even if a semiconductor module that generates a relatively large amount of heat is arranged in the downstream cooling unit 5, the semiconductor module can be efficiently installed. Can be cooled.
In addition, it has the same effect as that of the first embodiment.

(Embodiment 3)
As shown in FIGS. 12 to 15, the present embodiment is an embodiment in which the downstream cooling unit 5 constitutes the laminate 6 described later. As shown in FIGS. 13 to 15, the downstream cooling unit 5 has a plurality of cooling pipes 61 through which the refrigerant can flow. The plurality of cooling pipes 61 and the parts to be cooled that the downstream cooling unit 5 cools are arranged in a laminated manner so that the cooling pipes 61 sandwich the parts to be cooled to form the laminated body 6. The component to be cooled is the semiconductor module 65. Since the semiconductor module 65 has the same configuration as that shown in the second embodiment, redundant description will be omitted. In addition, in FIGS. 12 to 14, the direction in which the refrigerant flows is indicated by an arrow.

As shown in FIG. 13, the cooling pipe 61 has an elongated shape in the lateral direction Y. The plurality of cooling pipes 61 are laminated in the vertical direction X, which is the thickness direction of the cooling pipes 61, with a gap between them. The cooling pipes 61 adjacent to each other in the vertical direction X are connected to each other by connecting pipes 62 at both ends in the horizontal direction Y. The connecting pipe 62 is configured to be deformable in the vertical direction X. Further, in the cooling pipe 61 arranged at one end in the vertical direction X, an introduction protruding pipe 63 for introducing the refrigerant into the downstream cooling unit 5 and a discharge protruding pipe for discharging the refrigerant from the downstream cooling unit 5 64 are connected.

The laminate 6 is formed by disposing the semiconductor module 65 in a plurality of gaps provided between the plurality of cooling pipes 61. The plurality of semiconductor modules 65 are arranged in a posture in which the thickness direction is the vertical direction X. The semiconductor module 65 is sandwiched by a cooling pipe 61 adjacent to the vertical direction X. Although not shown, the laminated body 6 is held in a state of being elastically compressed in the vertical direction X by an elastic force such as a leaf spring.

As shown in FIG. 12, the cooler 10 and the downstream cooling unit 5 are housed in the case 7 of the power conversion device 1. The case 7 has a lower case 71 for accommodating the cooler 10, and an upper case 72 formed on the upper side of the lower case 71 and accommodating the downstream cooling unit 5. In FIG. 12, the case 7 schematically represents the outer shape when viewed from the lateral direction Y.

The cooler 10 and the downstream cooling unit 5 communicate with a connecting member 8 arranged outside the case 7, respectively. As a result, the refrigerant discharged from the cooler 10 flows into the connecting member 8 outside the case 7, then returns to the case 7 again, and flows into the downstream cooling unit 5.

As shown in FIG. 14, the refrigerant introduced from the introduction protruding pipe 63 into the downstream cooling unit 5 is appropriately distributed to the plurality of cooling pipes 61 via the connecting pipe 62 and flows through the cooling pipe 61 in the lateral direction Y. During this time, the refrigerant exchanges heat with the semiconductor module 65. The refrigerant that has received the heat of the semiconductor element 60 from the semiconductor module 65 is discharged from the cooler 10 via the connecting pipe 62 and the discharge protruding pipe 64. In this way, the semiconductor module 65 is cooled.
Others are the same as in the second embodiment.

In the present embodiment, the downstream cooling unit 5 constitutes the laminated body 6. As described above, since the cooler 10 in which the fragments of the sealing material 3 are not easily broken is arranged on the upstream side of the downstream cooling unit 5, the cooling performance of the downstream cooling unit 5 can be improved. In the present embodiment, the downstream cooling unit 5 constitutes the laminated body 6 and cools the semiconductor module 65 from both sides. Therefore, the cooling performance of the downstream cooling unit 5 can be further improved. Along with this, it is easy to reduce the size of the downstream cooling unit 5 while sufficiently ensuring the cooling performance of the downstream cooling unit 5.
In addition, it has the same action and effect as the actual form 2.

The present invention is not limited to each of the above-described embodiments, and can be applied to various embodiments without departing from the gist thereof. For example, in each of the above embodiments, the sealing material is a liquid gasket, but another sealing material such as an adhesive may be used. Further, the cooler and the downstream cooling unit may be provided with fins for improving the cooling property inside.

1 Power converter 10 Cooler 100 Refrigerant flow path 2 Flow path forming part 223, 231 Pair of sealing surfaces 3 Sealing material 4 Seal arrangement area 41 Inner peripheral end area 42 Outer peripheral end area Z Opposing direction of pair of sealing surfaces

Claims (7)

A cooler (10) having a refrigerant flow path (100) through which a refrigerant can flow and a flow path forming portion (2) forming the refrigerant flow path inside is provided.
The flow path forming portion includes a pair of sealing surfaces (223, 231 ) facing each other and a sealing material (3) that seals between the pair of sealing surfaces in the opposite direction (Z) of the pair of sealing surfaces. Have,
The seal arrangement region (4), which is a region between the pair of seal surfaces in the facing direction, is the facing direction in the direction from the side facing the refrigerant flow path to the side facing the outside of the cooler. Has multiple regions of different sizes
Wherein the plurality of regions, the inner peripheral end region (41) is a region facing the refrigerant flow path, the cooler the outer peripheral edge area which is an area that faces the outside of the (42), the inner peripheral end region A large spacing region (43), which is a region between the outer peripheral edge region and the outer peripheral edge region, is included.
Said sealing arrangement region, the length of the opposite direction (L1) the length of the facing direction of the outer peripheral edge region of the inner peripheral edge region (L2) much larger than the, and, the opposite of the large interval area The length (L3) in the direction is configured to be larger than either the length of the inner peripheral end region in the opposite direction and the length of the outer peripheral end region in the opposite direction.
The power conversion device (1) , wherein the seal material is arranged on the entire inner peripheral end region, the outer peripheral end region, and the large interval region of the seal arrangement region. The power conversion device according to claim 1, wherein one of the pair of sealing surfaces has a planar shape and the other has an uneven shape. The power conversion device according to claim 1 or 2, wherein the sealing material is a liquid gasket. On the downstream side of the refrigerant flow path in the flow direction of the refrigerant, a component different from the component cooled by the cooler is cooled, and a downstream side flow path (50) communicating with the refrigerant flow path is provided for downstream cooling. The power conversion device according to any one of claims 1 to 3 , wherein the part (5) is arranged. The downstream cooling unit has a plurality of cooling pipes (61) through which a refrigerant can flow, and the plurality of cooling pipes and the parts to be cooled that the downstream cooling unit cools are such that the cooling pipe is covered. The power conversion device according to claim 4 , wherein the laminated body (6) is formed by being laminated so as to sandwich the cooling component. The power conversion device according to claim 4 or 5 , wherein the component to be cooled to be cooled by the downstream cooling unit is a semiconductor module (65) including a semiconductor element (60). The power conversion device according to any one of claims 1 to 6 , wherein the power conversion device is mounted on a vehicle and used.

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