JP5532001B2 - Power converter - Google Patents

Description

  The present invention relates to a power conversion device including a power converter such as an inverter or a converter.

  Vehicles such as electric vehicles and hybrid vehicles are equipped with power converters such as an inverter that converts DC power into AC power and a converter that converts DC power into DC power having a different voltage. For example, Patent Document 1 discloses a power conversion device in which an inverter and a converter are integrally configured.

  Power converters such as inverters and converters generate a large amount of heat because a large current flows, and it is necessary to suppress these temperature increases. Therefore, the power conversion device of Patent Document 1 is provided with an inverter refrigerant channel and a converter refrigerant channel for cooling the inverter and the converter, respectively. Both refrigerant flow paths are connected by a connecting hose.

JP 2010-119275 A

However, in the power conversion device of Patent Document 1, the flow path port of the inverter refrigerant flow path and the flow path port of the converter refrigerant flow path are open in the same direction. For this reason, both the flow passage openings are connected using a U-shaped hose, leading to an increase in the size of the apparatus.
In order to solve this problem, it is conceivable to reduce the size of the connecting member itself such as a hose. However, in this case, the pressure loss in the connecting member becomes high, and the refrigerant cannot be circulated smoothly. The cooling performance for the power converter may not be sufficiently secured.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a power conversion device capable of reducing the size of the device while sufficiently securing the cooling performance for the power converter.

The first invention includes at least a first power converter, a first cooler having a first refrigerant flow path for circulating a refrigerant for cooling the first power converter, a second power converter, A power converter comprising: a second cooler having a second refrigerant flow path for circulating a refrigerant for cooling the second power converter;
The first flow path port formed at one end of the first refrigerant flow path of the first cooler and the second flow path port formed at one end of the second refrigerant flow path of the second cooler face each other. And is connected via a connecting member having elasticity ,
The first power converter and a part of the first cooler are housed in a first housing part, and the second power converter and a part of the second cooler are in a second housing. Is housed in a body part, and the first housing part and the second housing part are stacked on each other,
The first flow path port of the first refrigerant flow path and the second flow path port of the second refrigerant flow path are located outside the first housing part and the second housing part via the connection member. Connected,
At least a portion between the first housing portion and the second housing portion is provided with a gap portion in the stacking direction between the first housing portion and the second housing portion. The power conversion device is characterized in that the second flow path opening of the second refrigerant flow path is connected to the gap portion via the connection member (claim 1).
The second invention includes at least a first power converter, a first cooler having a first refrigerant flow path for circulating a refrigerant for cooling the first power converter, a second power converter, A power converter comprising: a second cooler having a second refrigerant flow path for circulating a refrigerant for cooling the second power converter;
The first flow path port formed at one end of the first refrigerant flow path of the first cooler and the second flow path port formed at one end of the second refrigerant flow path of the second cooler face each other. And is connected via a connecting member having elasticity,
The first power converter and a part of the first cooler are housed in a first housing part, and the second power converter and a part of the second cooler are in a second housing. Is housed in a body part, and the first housing part and the second housing part are stacked on each other,
The first flow path port of the first refrigerant flow path and the second flow path port of the second refrigerant flow path are located outside the first housing part and the second housing part via the connection member. Connected,
Non-stacking in which the second housing part or the first housing part is not stacked on the second housing part side of the first housing part or the first housing part side of the second housing part An area is formed, and the first flow path opening of the first refrigerant flow path and the second flow path opening of the second refrigerant flow path are connected via the connection member in the non-stacked area. The power converter is characterized in that (claim 2).

In the power conversion device of the present invention, the first channel port of the first refrigerant channel in the first cooler and the second channel port of the second refrigerant channel in the second cooler are arranged to face each other. In addition, they are connected via an elastic connecting member. Therefore, both can be connected linearly by the connecting member. Thereby, the connection space between both can be made small and size reduction of an apparatus can be achieved.
In addition, since the first flow path port of the first refrigerant flow path and the second flow path port of the second refrigerant flow path can be linearly connected by the connection member, pressure loss in the connection member is suppressed, and the refrigerant is smoothly supplied. It can be distributed. Thereby, the cooling performance with respect to the first power converter and the second power converter can be sufficiently ensured while downsizing the apparatus.

Further, as described above, the first refrigerant channel and the second refrigerant channel are connected by an elastic connecting member. Therefore, the connection part between both has followability and flexibility with respect to thermal expansion and thermal contraction of the first refrigerant channel and the second refrigerant channel. Thereby, the leakage of the refrigerant | coolant etc. resulting from a heat stress can be prevented.
In addition, even when the positional accuracy between the first flow path port of the first refrigerant flow path and the second flow path port of the second refrigerant flow path that are arranged to face each other is shifted, the connection member has elasticity and is flexible. Therefore, the positional accuracy deviation can be absorbed. Thereby, the connection between both becomes easy.

  Thus, according to the present invention, it is possible to provide a power conversion device that can reduce the size of the device while sufficiently securing the cooling performance for the power converter.

Sectional explanatory drawing which shows the structure of the power converter device in Example 1. FIG. FIG. 2 is a cross-sectional explanatory view taken along line AA in FIG. 1. FIG. 3 is a cross-sectional explanatory view taken along line B-B in FIG. 1. Explanatory drawing which shows the structure of a connection member periphery in Example 2. FIG. Explanatory drawing which shows the structure of a connection member periphery in Example 3. FIG. Explanatory drawing which shows the structure of a connection member periphery in a reference example . Explanatory drawing which shows the structure of a connection member periphery in a reference example .

In the power converter, it is preferable to use an insulating material as the connection member.
In this case, it is possible to prevent electromagnetic noise generated in the first power converter and the second power converter from propagating through the connecting member.
The connecting member is a hose made of EPDM, which is a terpolymer of ethylene, propylene, and a crosslinking diene monomer, or NBR (nitrile rubber), which is a copolymer of butadiene and acrylonitrile. Can be used.

Further, the first power converter and the first cooler are accommodated in a first housing part, and the second power converter and the second cooler are accommodated in a second housing part. cage, said the first housing portion and said second housing portion, that are arranged by stacking one another.
As a result , the first housing portion and the second housing portion are stacked, and the entire device is integrally configured, whereby the size of the device can be reduced.

In addition, the first flow path port of the first refrigerant flow path and the second flow path port of the second refrigerant flow path are formed by connecting the connection member outside the first housing part and the second housing part. that is connected through.
Thereby , even if the leakage of the refrigerant or the like occurs in the connection portion between the first refrigerant flow path and the second refrigerant flow path, the first power converter accommodated in the first housing portion and the second housing portion. The second power converter can be prevented from being affected.

In the first invention, at least a part between the first housing part and the second housing part is provided with a gap part in the stacking direction of both, and the first refrigerant flow path the first flow path opening and the second refrigerant flow path of the second flow path opening is it is connected via the connecting member in the gap portion.
Accordingly, by using a gap portion, which is a space formed between the first housing portion and the second housing portion, as a connection space between the first refrigerant flow path and the second refrigerant flow path, The size can be further reduced.

In a second aspect of the invention, the second housing portion or the first housing is provided on the second housing portion side of the first housing portion or on the first housing portion side of the second housing portion. A non-stacked region in which body parts are not stacked is formed, and the first channel port of the first coolant channel and the second channel port of the second coolant channel are connected to the connection member in the non-stacked region. that is connected via a.
Thereby , the non-laminated area, which is a space formed by the size and arrangement of the first housing part and the second housing part, is used as a connection space between the first refrigerant flow path and the second refrigerant flow path. As a result, the apparatus can be further reduced in size.

The first cooler includes a first protrusion formed to protrude outward from the first housing portion, and the second cooler is formed to protrude outward from the second housing portion. a second protrusion that is, above the tip of the first protrusion and the second protrusion, respectively it is preferable that the first flow path opening and the second flow path opening is formed (claim 3 ).
In this case, the connection between the first refrigerant flow path and the second refrigerant flow path can be easily performed by connecting the first protrusion and the second protrusion with the connecting member.

In addition, the first protrusion of the first cooler or the second protrusion of the second cooler is a divided portion formed by dividing a tip portion including the first flow path port or the second flow path port. It is preferable to have (claim 4 ).
In this case, even when the positional accuracy between the first flow path port of the first refrigerant flow path and the second flow path port of the second refrigerant flow path that are arranged to face each other is shifted, the connection between both is easy. Can be done.
For example, the first projecting portion (second projecting portion) and the divided portion of the second projecting portion (first projecting portion) are connected in advance via a connecting member, and then the second projecting portion (first projecting portion). ) Is connected to the other part of the second projecting part (first projecting part), the connection can be made easily.

Preferably, the first power converter is an inverter that converts DC power into AC power, and the second power converter is a converter that converts DC power into DC power having a different voltage. 5 ).
In this case, a combination of an inverter and a converter provides a power conversion device suitable for mounting on a vehicle such as an electric vehicle or a hybrid vehicle.

The inverter has a semiconductor module containing a semiconductor element, and the first cooler forms a part of the first refrigerant flow path and has a module cooling unit for cooling the semiconductor module. And it is preferable that the said semiconductor module and the said module cooling part are laminated | stacked (Claim 6 ).
In this case, the dimensional variation in the stacking direction between the semiconductor module and the module cooling unit can be absorbed by the connecting member between the first refrigerant channel and the second refrigerant channel.

Moreover, it is preferable that the said power converter device is mounted and used for a vehicle (Claim 7 ).
In this case, the downsizing of the device can increase the degree of freedom of mounting in the vehicle.

Example 1
A power converter according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 3, the power conversion device 1 of the present example includes a first refrigerant flow path 30 for circulating an inverter (first power converter) 2 and a refrigerant for cooling the inverter 2. A cooler 3, a converter (second power converter) 4, and a second cooler 5 having a second refrigerant flow path 50 for circulating a refrigerant for cooling the converter 4 are provided.
A first discharge port (first flow path port) 302 formed at one end of the first refrigerant flow path 30 of the first cooler 3 and a second formed at one end of the second refrigerant flow path 50 of the second cooler 5. The introduction port (second flow path port) 501 is disposed so as to be opposed to each other through a connection member 71 having elasticity.
This will be described in detail below.

As shown in FIG. 1 to FIG. 3, the power conversion device 1 includes an inverter 2 that converts DC power into AC power, a first cooler 3 that cools the inverter 2, and DC power that has a different voltage. A converter 4 for conversion and a second cooler 5 for cooling the converter 4 are provided.
The inverter 2 and the first cooler 3 are accommodated in the first casing part 61, and the converter 4 and the second cooler 5 are accommodated in the second casing part 62. The first housing portion 61 and the second housing portion 62 are stacked on each other in the vertical direction Z.

As shown in FIGS. 1 and 2, the first casing portion 61 and the second casing portion 62 have different lengths in the longitudinal direction X perpendicular to the vertical direction Z. In this example, the upper first housing part 61 is shorter than the lower second housing part 62. Therefore, a non-stacked region 69 in which the first housing portion 61 is not stacked is formed on the second housing portion 62.
Further, as shown in FIG. 2, the first casing portion 61 and the second casing portion 62 have the same length in the width direction Y orthogonal to the vertical direction Z.

  As shown in FIGS. 1 and 2, in the first housing portion 61, the inverter 2 has a plurality of semiconductor modules 21 containing semiconductor elements. The first cooler 3 includes a plurality of cooling pipes (module cooling units) 31 through which a refrigerant that cools the semiconductor module 21 flows. The plurality of semiconductor modules 21 and the plurality of cooling pipes 31 are alternately stacked. As a result, the semiconductor module 21 is sandwiched from both sides by the cooling pipe 31. The semiconductor module 21 includes a switching element such as IGBT and a diode such as FWD.

As shown in FIG. 2, in the plurality of cooling pipes 31 of the first cooler 3, adjacent cooling pipes 31 are connected to each other at both ends by connecting pipes 32. The cooling pipe 31 at one end in the longitudinal direction X is connected to a first introduction pipe 33 for introducing the refrigerant and a first discharge pipe (first protrusion) 34 for discharging the refrigerant.
Further, the first refrigerant flow path 30 of the first refrigerant device 3 is formed inside the cooling pipe 31, the connecting pipe 32, the first introduction pipe 33, and the first discharge pipe 34 described above. Further, the refrigerant flows in the order of the first introduction pipe 33, the cooling pipe 31 (including the connection pipe 32), and the first discharge pipe 34.

  As shown in FIGS. 1 and 2, the semiconductor module 21 has a control terminal 211 that protrudes upward and an electrode terminal 212 that protrudes downward. The control terminal 211 is connected to a control circuit board (not shown), and the electrode terminal 212 is connected to a bus bar (not shown). A control current for controlling the switching element is input to the control terminal 211, and controlled power is input / output to / from the semiconductor module 21 from the electrode terminal 212.

  As shown in FIG. 1, the converter 4 is disposed on the lower side in the second housing portion 62. A second cooler 5 for cooling the converter 4 is disposed on the upper side in the second housing portion 62. The converter 4 and the second cooler 5 are stacked on each other in the vertical direction Z, and the converter 4 is disposed so as to contact the lower surface of the second cooler 5.

As shown in FIGS. 1 and 3, the second cooler 5 includes a flat plate-like cooling part 51, a second introduction pipe (second projecting part) 52 for introducing a refrigerant into the cooling part 51, and its cooling. And a second discharge pipe 53 for discharging the refrigerant from the section 51. Further, a partition portion 511 for forming the second refrigerant channel 50 is formed in the cooling portion 51.
Further, the second refrigerant flow path 50 of the second cooler 5 is formed inside the cooling unit 51, the second introduction pipe 52, and the second discharge pipe 53 described above. In addition, the refrigerant flows in the order of the second introduction pipe 52, the cooling unit 51, and the second discharge pipe 53.

  In addition, as a refrigerant | coolant circulated through the 1st refrigerant | coolant flow path 30 of the 1st cooler 3, and the 2nd refrigerant | coolant flow path 50 of the 2nd cooler 5, natural refrigerant | coolants, such as water and ammonia, an ethylene glycol type antifreeze liquid are used, for example. It is possible to use refrigerants such as mixed water, fluorocarbon refrigerants such as fluorinate, chlorofluorocarbon refrigerants such as HCFC123 and HFC134a, alcohol refrigerants such as methanol and alcohol, and ketone refrigerants such as acetone.

  Further, as shown in FIGS. 1 and 2, in the first cooler 3, the first introduction pipe 33 penetrates the first housing portion 61 from the inside, and the first housing portion 61 does not extend in the longitudinal direction X. It is formed so as to protrude to the laminated region 69 side. Similarly to the first introduction pipe 33, the first discharge pipe 34 penetrates the first housing portion 61 from the inside and protrudes from the first housing portion 61 toward the non-laminated region 69 in the longitudinal direction X. Is formed.

In addition, seal members 39 are respectively provided between the first introduction pipe 33 and the first discharge pipe 34 and the first housing portion 61 to ensure airtightness between them.
The first introduction pipe 33 is formed with a first introduction port 301 that is one end of the first refrigerant flow path 30. The first discharge pipe 34 is formed with a first discharge port (first flow channel port) 302 that is the other end of the first refrigerant flow channel 30.

  As shown in FIGS. 1 to 3, in the second cooler 5, the second introduction pipe 52 penetrates the second housing portion 62 from the inside and is located above the second housing portion 62 in the vertical direction Z. And bent to the first housing part 61 side in the longitudinal direction X in the middle. Further, the second discharge pipe 53 penetrates the second housing part 62 from the inside, and the first introduction pipe 33 and the first discharge pipe 34 of the first cooler 3 in the longitudinal direction X from the second housing part 62. It is formed so as to protrude in the same direction as the protruding direction.

Further, the second introduction pipe 52 has a dividing portion 521 formed by dividing a tip portion including the second introduction port 501. The division part 521 is provided with a flange part 522. The flange portion 522 is fastened and fixed to the second housing portion 62 by a fixing member (screw) 523.
The second introduction pipe 52 has a second introduction port (second flow passage port) 501 that is one end of the second refrigerant flow channel 50. In this example, a second introduction port 501 is formed at the tip of the split portion 52 of the second introduction pipe 52. The second discharge pipe 53 is formed with a second discharge port 502 that is the other end of the second refrigerant channel 50.

  As shown in FIGS. 1 and 2, the first outlet 302 of the first outlet 34 of the first cooler 3 and the second inlet 501 of the second inlet 52 of the second cooler 5 are longitudinal. They are arranged to face each other in the direction X. That is, the first discharge port 302 of the first refrigerant channel 30 of the first cooler 3 and the second introduction port 501 of the second refrigerant channel 50 of the second cooler 5 are opposed to each other in the longitudinal direction X. Has been placed. Both are connected via a cylindrical connecting member 71. Specifically, the first discharge pipe 34 and the second introduction pipe 52 are each inserted into the connection member 71 and fixed by a hose clip 72. The connection member 71 is a hose made of EPDM, NBR or the like that is an insulating material while having elasticity.

Next, a method for connecting the first refrigerant flow path 30 of the first cooler 3 and the second refrigerant flow path 50 of the second cooler 5 will be described.
First, the first discharge pipe 34 of the first cooler 3 and the divided portion 521 of the second introduction pipe 52 of the second cooler 5 are connected via the connection member 71. Specifically, the divided portions 521 of the first discharge pipe 34 and the second introduction pipe 52 are inserted into both sides of the connection member 71, respectively.

Next, the dividing portion 521 of the second introduction pipe 52 is fixed to the housing 62. Specifically, the flange portion 522 of the dividing portion 521 is fastened and fixed to the second housing portion 62 by a fixing member (screw) 523, and the dividing portion 521 is connected to the other portion of the second introduction pipe 52.
As described above, the first refrigerant flow path 30 of the first cooler 3 and the second refrigerant flow path 50 of the second cooler 5 are connected.

Next, the effect of the power converter device 1 of this example is demonstrated.
In the power conversion device 1 of this example, the first discharge port 302 of the first refrigerant flow path 30 in the first cooler 3 and the second introduction port 501 of the second refrigerant flow path 50 in the second cooler 5 are opposed to each other. It is arranged through a connecting member 71 that is arranged and has elasticity. Therefore, the connection member 71 can linearly connect between them. Thereby, the connection space between both can be made small and size reduction of an apparatus can be achieved.
Further, since the first discharge port 302 of the first refrigerant channel 30 and the second introduction port 501 of the second refrigerant channel 50 can be linearly connected by the connection member 71, the pressure loss in the connection member 71 is reduced. The refrigerant can be smoothly circulated. Thereby, the cooling performance with respect to the inverter 2 and the converter 4 can be sufficiently ensured while downsizing the apparatus.

Further, as described above, the first refrigerant channel 30 and the second refrigerant channel 50 are connected by the connecting member 71 having elasticity. Therefore, the connection part between both has followability and flexibility with respect to the thermal expansion and thermal contraction of the first refrigerant channel 30 and the second refrigerant channel 50. Thereby, the leakage of the refrigerant | coolant etc. resulting from a heat stress can be prevented.
Further, even when the positional accuracy between the first discharge port 302 of the first refrigerant flow path 30 and the second introduction port 501 of the second refrigerant flow path 50 that are arranged to face each other is changed, it has elasticity and flexibility. The displacement of the positional accuracy can be absorbed by the connecting member 71 having a gap. Thereby, the connection between both becomes easy.

  In this example, the connection member 71 is made of an insulating material. Therefore, it is possible to prevent electromagnetic noise generated in the inverter 2 and the converter 4 from propagating through the connection member 71.

  Further, the inverter 2 and the first cooler 3 are accommodated in the first housing part 61, and the converter 4 and the second cooler 5 are accommodated in the second housing part 62, and the first The housing part 61 and the second housing part 62 are stacked on each other. Thereby, the whole apparatus can be comprised integrally and size reduction of an apparatus can be achieved.

  The first discharge port 302 of the first refrigerant channel 30 and the second introduction port 501 of the second refrigerant channel 50 connect the connection member 71 outside the first housing part 61 and the second housing part 62. Connected through. Therefore, even if refrigerant leaks or the like occurs at the connection portion between the first refrigerant flow path 30 and the second refrigerant flow path 50, the inverters housed in the first housing portion 61 and the second housing portion 62 2 and the converter 4 can be prevented from being affected.

  In addition, a non-stacked region 69 in which the first housing part 61 is not stacked is formed on the first housing part 61 side of the second housing part 62, and the first discharge port 302 of the first refrigerant channel 30 is formed. And the second introduction port 501 of the second refrigerant channel 50 are connected to each other in the non-stacked region 69 via the connection member 71. A non-laminated region 69, which is a space formed by the size of the first housing part 61 and the second housing part 62 in the longitudinal direction X being different between the first refrigerant channel 30 and the second refrigerant channel 50. By using it as a connection space, it is possible to further reduce the size of the apparatus.

  The first cooler 3 includes a first discharge pipe 34 that protrudes outward from the first casing portion 61, and the second cooler 5 protrudes outward from the second casing portion 62. It has the formed 2nd introduction pipe 52, and the 1st discharge port 302 and the 2nd introduction port 501 are formed in the tip of the 1st discharge pipe 34 and the 2nd introduction pipe 52, respectively. Therefore, the connection between the first refrigerant flow path 30 and the second refrigerant flow path 50 can be easily performed by connecting the first discharge pipe 34 and the second introduction pipe 52 by the connecting member 71.

  Further, the second introduction pipe 52 of the second cooler 5 has a dividing portion 521 formed by dividing the tip portion including the second introduction port 501. Therefore, even when the positional accuracy between the first discharge port 302 of the first refrigerant flow path 30 and the second introduction port 501 of the second refrigerant flow path 50 that are arranged to face each other is shifted, the connection between the two is made. It can be done easily. As in this example, the first discharge pipe 34 of the first cooler 3 and the division part 521 of the second introduction pipe 52 of the second cooler 5 are connected in advance via the connection member 71, and then the first By connecting the divided part 521 of the 2 introduction pipe 52 to the other part of the second introduction pipe 52, the connection can be easily performed.

  The inverter 2 has a semiconductor module 21 containing a semiconductor element, and the first cooler 3 forms a part of the first refrigerant flow path 30 and a cooling pipe 31 for cooling the semiconductor module 21. The semiconductor module 21 and the cooling pipe 31 are laminated. Therefore, dimensional variations in the stacking direction (longitudinal direction X) of the semiconductor module 21 and the cooling pipe 31 can be absorbed by the connecting member 71 between the first refrigerant channel 30 and the second refrigerant channel 50.

  Thus, according to this example, it is possible to provide the power conversion device 1 that can reduce the size of the device while sufficiently securing the cooling performance for the inverter 2 and the converter 4.

(Example 2)
This example is an example in which the configuration of the power conversion device 1 is changed as shown in FIG.
In this example, as shown in the figure, in the first cooler 3, the first discharge pipe 34 penetrates the first housing part 61 from the inside and is not laminated in the longitudinal direction X from the first housing part 61. While projecting to the region 69 side, it is formed to bend downward in the vertical direction Y in the middle.
Further, in the second cooler 5, the second introduction pipe 52 penetrates the second housing part 62 from the inside and is formed so as to protrude upward in the vertical direction Z from the second housing part 62. .

Further, as shown in the figure, the first outlet 302 of the first refrigerant flow path 30 in the first cooler 3 and the second inlet 501 of the second refrigerant flow path 50 in the second cooler 5 are in the vertical direction. They are arranged so as to oppose each other at Z, and are connected via a connecting member 71 in the non-stacked region 69.
The other configuration is the same as that of the first embodiment, and has the same operation and effect.

(Example 3)
This example is an example in which the configuration of the power conversion device 1 is changed as shown in FIG.
In this example, as shown in the figure, a gap 68 is provided in a part between the first housing 61 and the second housing 62 in the stacking direction (vertical direction Z) of both. .
Further, in the first cooler 3, the first discharge pipe 34 is formed so as to penetrate the first housing portion 61 from the inside and protrude downward from the first housing portion 61 in the vertical direction Y. Yes.
Further, in the second cooler 5, the second introduction pipe 52 penetrates the second housing part 62 from the inside and is formed so as to protrude upward in the vertical direction Z from the second housing part 62. .

Further, as shown in the figure, the first outlet 302 of the first refrigerant flow path 30 in the first cooler 3 and the second inlet 501 of the second refrigerant flow path 50 in the second cooler 5 are in the vertical direction. They are arranged so as to face each other at Z, and are connected via a connecting member 71 at the gap 68.
Other configurations are the same as those in the first embodiment.

In the case of this example, the gap portion 68 that is a space formed between the first casing portion 61 and the second casing portion 62 is connected to the first refrigerant flow path 30 and the second refrigerant flow path 50. By using it as a space, it is possible to further reduce the size of the apparatus.
In addition, the same effects as those of the first embodiment are obtained.

( Reference example )
In this example, as shown in FIG. 6, the configuration of the power conversion device 1 is changed.
In this example, as shown in the figure, in the second cooler 5, the second introduction pipe 52 is constituted by a main body 520 and a divided portion 521 connected to the main body 520.
The main body 520 penetrates the second housing 62 from the inside and is formed to protrude from the second housing 62 to one side in the longitudinal direction X. The dividing portion 521 is formed on one side in the longitudinal direction X from the main body portion 520, and is bent to the upper side in the vertical direction Z in the middle, and further bent to the first housing portion 61 side in the longitudinal direction X. Has been.

As shown in the figure, in the first cooler 3, the first discharge pipe 34 penetrates the first housing part 61 and is formed so as to protrude from the first housing part 61 to one side in the longitudinal direction X. Has been.
In addition, the first casing portion 61 and the second casing portion 62 arranged in a stacked manner have the same length in the longitudinal direction X and the width direction Y (not shown).

Further, as shown in the figure, the main body portion 520 and the divided portion 521 in the second introduction pipe 52 are provided with a flange portion 530 provided respectively after a seal member (not shown) interposed therebetween. 531 are overlapped and fixed by a fixing member (screw) 54.
As shown in FIG. 7, the main body part 520 and the dividing part 521 may be fixed by a pipe clip 73 by inserting the main body part 520 into the dividing part 521.

As shown in FIG. 6 (FIG. 7), the first outlet 302 of the first refrigerant flow path 30 in the first cooler 3 and the second inlet 501 of the second refrigerant flow path 50 in the second cooler 5 Are arranged so as to face each other in the longitudinal direction X, and are connected via a connecting member 71.
The other configuration is the same as that of the first embodiment, and has the same operation and effect.

DESCRIPTION OF SYMBOLS 1 Power converter device 2 Inverter (1st power converter)
3 1st cooler 30 1st refrigerant | coolant flow path 302 1st discharge port (1st flow path port)
4 Converter (second power converter)
5 Second cooler 50 Second refrigerant flow path 501 Second introduction port (second flow path port)

Claims (7)

At least a first power converter, a first cooler having a first refrigerant flow path for circulating a refrigerant for cooling the first power converter, a second power converter, and the second power converter A power converter comprising a second cooler having a second refrigerant flow path for circulating a refrigerant for cooling the
The first flow path port formed at one end of the first refrigerant flow path of the first cooler and the second flow path port formed at one end of the second refrigerant flow path of the second cooler face each other. And is connected via a connecting member having elasticity ,
The first power converter and a part of the first cooler are housed in a first housing part, and the second power converter and a part of the second cooler are in a second housing. Is housed in a body part, and the first housing part and the second housing part are stacked on each other,
The first flow path port of the first refrigerant flow path and the second flow path port of the second refrigerant flow path are located outside the first housing part and the second housing part via the connection member. Connected,
At least a portion between the first housing portion and the second housing portion is provided with a gap portion in the stacking direction between the first housing portion and the second housing portion. The power converter according to claim 2, wherein the second flow path opening of the second refrigerant flow path is connected to the gap portion through the connection member . At least a first power converter, a first cooler having a first refrigerant flow path for circulating a refrigerant for cooling the first power converter, a second power converter, and the second power converter A power converter comprising a second cooler having a second refrigerant flow path for circulating a refrigerant for cooling the
The first flow path port formed at one end of the first refrigerant flow path of the first cooler and the second flow path port formed at one end of the second refrigerant flow path of the second cooler face each other. And is connected via a connecting member having elasticity,
The first power converter and a part of the first cooler are housed in a first housing part, and the second power converter and a part of the second cooler are in a second housing. Is housed in a body part, and the first housing part and the second housing part are stacked on each other,
The first flow path port of the first refrigerant flow path and the second flow path port of the second refrigerant flow path are located outside the first housing part and the second housing part via the connection member. Connected,
Non-stacking in which the second housing part or the first housing part is not stacked on the second housing part side of the first housing part or the first housing part side of the second housing part An area is formed, and the first flow path opening of the first refrigerant flow path and the second flow path opening of the second refrigerant flow path are connected via the connection member in the non-stacked area. The power converter characterized by the above-mentioned. 3. The power conversion device according to claim 1, wherein the first cooler includes a first protrusion formed to protrude outward from the first housing portion, and the second cooler includes the first cooler described above. A second projecting portion that projects outward from the second housing portion, and the first channel port and the second channel port are provided at the ends of the first projecting unit and the second projecting unit, respectively. A power converter characterized by being formed . 4. The power conversion device according to claim 3, wherein the first protrusion of the first cooler or the second protrusion of the second cooler includes the first flow path port or the second flow path port. A power converter having a split protrusion formed by dividing a portion . 5. The power conversion device according to claim 1, wherein the first power converter is an inverter that converts DC power into AC power, and the second power converter converts DC power into voltage. It is a converter which converts into direct-current power from which these differ . Power converter characterized by the above-mentioned. 6. The power conversion device according to claim 5, wherein the inverter includes a semiconductor module containing a semiconductor element, and the first cooler constitutes a part of the first refrigerant flow path and the semiconductor module. A power conversion device having a module cooling unit for cooling, wherein the semiconductor module and the module cooling unit are stacked . The power converter according to any one of claims 1 to 6, wherein the power converter is mounted on a vehicle and used .

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