WO2020217983A1 - 電力変換装置 - Google Patents

電力変換装置 Download PDF

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Publication number
WO2020217983A1
WO2020217983A1 PCT/JP2020/015763 JP2020015763W WO2020217983A1 WO 2020217983 A1 WO2020217983 A1 WO 2020217983A1 JP 2020015763 W JP2020015763 W JP 2020015763W WO 2020217983 A1 WO2020217983 A1 WO 2020217983A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealing member
case
connector
pipe
peripheral surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2020/015763
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
和哉 竹内
智寛 島津
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Publication of WO2020217983A1 publication Critical patent/WO2020217983A1/ja
Priority to US17/510,938 priority Critical patent/US11805628B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
    • H05K7/20927—Liquid coolant without phase change
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W40/00—Arrangements for thermal protection or thermal control
    • H10W40/40—Arrangements for thermal protection or thermal control involving heat exchange by flowing fluids
    • H10W40/47—Arrangements for thermal protection or thermal control involving heat exchange by flowing fluids by flowing liquids, e.g. forced water cooling
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W40/00—Arrangements for thermal protection or thermal control
    • H10W40/60—Securing means for detachable heating or cooling arrangements, e.g. clamps
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W40/00—Arrangements for thermal protection or thermal control
    • H10W40/60—Securing means for detachable heating or cooling arrangements, e.g. clamps
    • H10W40/611—Bolts or screws
    • H10W40/613—Bolts or screws for stacked arrangements of a plurality of semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/007—Plural converter units in cascade
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
    • H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
    • H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current

Definitions

  • This disclosure relates to a power converter.
  • Patent Document 1 describes a semiconductor module having a built-in switching element, a cooler for cooling the semiconductor module, a case for accommodating the semiconductor module and the cooler, and a refrigerant outflow pipe from which the refrigerant flows out from the cooler.
  • a power conversion device including a connecting pipe provided between them is disclosed.
  • the connecting pipe of this power conversion device is provided with a flange portion arranged outside the case and a tubular portion extending from the flange portion to the inside of the case through a through hole of the case.
  • the flange portion abuts on the outer surface of the case via a surface sealing member which is an O-ring for airtight sealing
  • the tubular portion is an O-ring for watertight sealing on the outer peripheral surface of the refrigerant outflow pipe. It is configured to abut through a shaft seal member.
  • the sealing structure in which the gap between the refrigerant outflow pipe and the tubular portion of the connecting pipe is sealed with a shaft seal member makes it possible to prevent the refrigerant from leaking from this gap.
  • the shaft sealing member since the shaft sealing member is arranged inside the case, if the sealing performance of the shaft sealing member deteriorates or a problem occurs, the shaft sealing member is used for sealing. There is a problem that it is difficult to prevent the refrigerant that has passed through the region from flowing into the case.
  • the present disclosure is intended to provide a power conversion device capable of preventing the refrigerant of the cooler from flowing into the case accommodating the semiconductor module.
  • a semiconductor module with a built-in switching element and A cooler having a heat exchange unit capable of exchanging heat with the semiconductor module, an introduction pipe for introducing a refrigerant into the heat exchange unit, and an discharge pipe for discharging the refrigerant from the heat exchange unit.
  • a case for accommodating the semiconductor module and the cooler A connector connected to the refrigerant flow pipe, which is at least one of the introduction pipe and the discharge pipe of the cooler, outside the case.
  • a sealing member that watertightly seals between the refrigerant flow pipe and the connector, With The sealing member is formed on a connector-side tubular portion interposed between the inner peripheral surface of the connector and the outer peripheral surface of the refrigerant flow pipe, and from the connector-side tubular portion to the inner peripheral surface of the connector.
  • a first projecting portion for watertight sealing that projects radially outward in a ring shape, and a water seal that projects radially inward from the connector-side tubular portion toward the outer peripheral surface of the refrigerant flow pipe.
  • a power converter which has a second protrusion for stopping. It is in.
  • the heat exchange unit of the cooler can exchange heat with a semiconductor module having a built-in switching element.
  • the connector is connected to the refrigerant flow pipe, which is at least one of the inlet pipe and the discharge pipe of the cooler, outside the case.
  • the first protrusion for watertight sealing of the sealing member comes into contact with the inner peripheral surface of the connector, and the second protrusion for watertight sealing of the sealing member is the refrigerant flow pipe.
  • the space between the refrigerant flow pipe and the connector is watertightly sealed.
  • the sealing member is configured such that the first protruding portion for watertight sealing and the second protruding portion for watertight sealing project in opposite directions from the tubular portion on the connector side.
  • the first protrusion for watertight sealing is pressed against the inner peripheral surface of the connector
  • the second protrusion for watertight sealing is pressed against the outer peripheral surface of the refrigerant flow pipe to seal the watertightly.
  • Both the 1 protruding portion and the second protruding portion for watertight sealing can be supported by the tubular portion on the connector side.
  • Such a sealing member is excellent in watertight sealing performance between the refrigerant flow pipe and the connector.
  • this sealing member watertightly seals between the refrigerant flow pipe and the connector outside the case, and if the watertight sealing performance of the sealing member deteriorates or a problem occurs, etc. Even if there is, the refrigerant that has passed through the sealing region of the first protruding portion for watertight sealing of the sealing member and the sealing region of the second protruding portion for watertight sealing does not flow into the case as it is. Can be leaked to the outside of.
  • FIG. 1 is a cross-sectional view of the power conversion device of the first embodiment.
  • FIG. 2 is a cross-sectional view taken along the line II-II of FIG.
  • FIG. 3 is a front view of the semiconductor module in FIG.
  • FIG. 4 is an inverter circuit diagram of the power conversion device of the first embodiment.
  • FIG. 5 is a cross-sectional view of the first region in FIG.
  • FIG. 6 is a perspective view of the first sealing member in FIG. 5 as viewed from the collar side.
  • FIG. 7 is a cross-sectional view of the second region in FIG. FIG.
  • FIG. 8 is a diagram schematically showing a state when the connector and the sealing member are assembled.
  • FIG. 9 is a cross-sectional view of the power conversion device of the second embodiment corresponding to FIG.
  • FIG. 10 is a cross-sectional view of the power conversion device of the second embodiment corresponding to FIG.
  • FIG. 11 is a cross-sectional view of the power conversion device of the third embodiment corresponding to FIG.
  • FIG. 12 is a cross-sectional view of the power conversion device of the fourth embodiment corresponding to FIG.
  • FIG. 13 is a cross-sectional view of the power conversion device of the fifth embodiment corresponding to FIG.
  • FIG. 14 is a cross-sectional view of the power conversion device of the sixth embodiment corresponding to FIG.
  • FIG. 15 is a cross-sectional view of the power conversion device of the seventh embodiment corresponding to FIG.
  • This power conversion device is mounted on a vehicle such as an electric vehicle or a hybrid vehicle, and is configured as an in-vehicle power conversion device that converts power between DC power and AC power.
  • the first direction which is the stacking direction of a plurality of cooling pipes arranged in parallel with each other in the cooler, is indicated by an arrow X
  • the second direction in which each cooling pipe extends is indicated by an arrow Y
  • the third direction orthogonal to both the first direction and the second direction is indicated by an arrow Z.
  • the power converter 1 of the first embodiment generally includes a plurality of semiconductor modules 10, a cooler 20, and a case 30.
  • the case 30 is configured as a metal container that houses a plurality of semiconductor modules 10, a cooler 20, and a plurality of other elements.
  • the plurality of elements include a capacitor 2, a control board 3, a reactor 4, and a DC-DC converter 5.
  • the capacitor 2 has a capacitor element 2a and a pair of metal electrodes 2p and 2n.
  • One of the metal electrodes 2p is electrically connected to the positive electrode terminal 11p of the switching element 11 built in the semiconductor module 10 via a metal bus bar 6.
  • the other metal electrode 2n is electrically connected to the negative electrode terminal 11n of the switching element 11 of the semiconductor module 10 via a metal bus bar 7.
  • the cooler 20 has a function of cooling a plurality of semiconductor modules 10 by using a cooling medium (hereinafter, simply referred to as “refrigerant”).
  • the cooler 20 is a laminated cooler, and includes a plurality of cooling pipes 21 that are laminated and arranged together with the plurality of semiconductor modules 10.
  • the plurality of cooling pipes 21 are arranged in parallel with each other with a space 21a in which the plurality of semiconductor modules 10 are interposed, and are laminated in the first direction X.
  • the cooling pipe 21 extends in a long shape in the second direction Y, and has a rectangular cross-sectional shape (cross-sectional shape in a plane defined by the first direction X and the third direction Z) with respect to the first direction X. ..
  • the cooling pipe 21 is connected in parallel to each of the introduction pipe 22 and the discharge pipe 23.
  • the cooling pipe 21 is configured as a heat exchange unit capable of exchanging heat with the semiconductor module 10. Therefore, the cooling pipe 21 is preferably made of a material having high thermal conductivity, for example, a metal material such as aluminum.
  • the outer cooling pipe 21A of the plurality of cooling pipes 21 is pressurized to the right side in FIG. 1 by the leaf spring 27 for pressurizing.
  • the leaf spring 27 is supported by a support pin 28 fixed to the case 30.
  • Both the introduction pipe 22 and the discharge pipe 23 extend in the first direction X, which is the stacking direction of the plurality of cooling pipes 21, and reach the case 30 via the connector 40 in each of the first region R1 and the second region R2. It is fixed.
  • An external pipe E such as a rubber hose is connected to the connector 40.
  • the introduction pipe 22 and the discharge pipe 23 are preferably made of the same material as the cooling pipe 21, for example, a metal material such as aluminum.
  • the introduction pipe 22 is a pipe for introducing the refrigerant into the cooling pipe 21, and the discharge pipe 23 is a pipe for discharging the refrigerant from the cooling pipe 21.
  • the refrigerant introduced from the introduction pipe 22 flows in parallel with the plurality of cooling pipes 21 in the second direction, and when flowing through the refrigerant flow path in each cooling pipe 21, both sides of the first direction X of the cooling pipe 21 After cooling the semiconductor module 10 located in, it is discharged from the discharge pipe 23.
  • Typical refrigerants include water mixed with ethylene glycol-based antifreeze, natural refrigerants such as water and ammonia, fluorocarbon-based refrigerants such as Florinate, chlorofluorocarbon-based refrigerants such as HCFC123 and HFC134a, and alcohol-based refrigerants such as methanol and alcohol.
  • a ketone refrigerant such as acetone can be used.
  • the semiconductor module 10 is a 2in1 type module in which two switching elements 11 are built in the module body.
  • the semiconductor module 10 includes a pair of electrode terminals, the positive electrode terminal 11p and the negative electrode terminal 11n, an output terminal 12 connected to the positive electrode of an auxiliary battery (auxiliary battery B2 in FIG. 4) described later, and a control board 3. Among them, a plurality of control terminals 13 connected to a control circuit for driving and controlling the switching element 11 are provided.
  • the power conversion device 1 has an inverter circuit 70 which is a power conversion circuit that converts DC power supplied from DC power supply B1 into AC power.
  • the inverter circuit 70 the plurality of semiconductor modules 10 are electrically connected to the control board 3, and the switching operation (on / off operation) is controlled by the control board 3.
  • the control board 3 is fixed to the case 30 as shown in FIG.
  • the capacitor 2A, the reactor 4, and the two semiconductor modules 10A constitute a booster portion 71 of the inverter circuit 70, which is a power conversion circuit.
  • the boosting unit 71 has a function of boosting the voltage of the DC power supply B1 by a switching operation (on / off operation) of the semiconductor module 10A.
  • the capacitor 2A is a capacitor for removing the noise current included in the current supplied from the DC power supply B1, and is also called a filter capacitor. Like the capacitor 2 described above, the capacitor 2A is configured as a capacitor having a film capacitor element.
  • the reactor 4 is a passive element using an inductor.
  • the capacitor 2 and the six semiconductor modules 10B constitute a conversion unit 72 of the inverter circuit 70, which is a power conversion circuit.
  • the conversion unit 72 has a function of converting DC power after being boosted by the boosting unit 71 into AC power by a switching operation (on / off operation) of the semiconductor module 10B.
  • the capacitor 2 is a capacitor for smoothing the DC power boosted by the booster 71, and is also called a smoothing capacitor.
  • the AC power obtained by the conversion unit 72 drives the three-phase AC motor M for traveling the vehicle.
  • the DC-DC converter 5 is connected to the DC power supply B1.
  • the DC-DC converter 5 is used to step down the voltage of the DC power supply B1 and charge the auxiliary battery B2 having a lower voltage than the DC power supply B1.
  • the auxiliary battery B2 is used as a power source for various devices mounted on the vehicle.
  • the current flowing through the booster 71 is detected by the current sensor 73. Further, the current flowing between the conversion unit 72 and the three-phase AC motor M is detected by the current sensors 74 and 75.
  • the current sensors 73, 74, 75 are electrically connected to the control board 3, and the detection information by the current sensors 73, 74, 75 is transmitted to the control board 3.
  • the power conversion device 1 includes a connector 40, a first sealing member 50, and a second sealing member 60.
  • the introduction pipe 22 as a refrigerant flow pipe is inserted through a through hole 31 formed through the case 30, and the tip portion is configured to project to the outside of the case 30.
  • the introduction pipe 22 is configured to be connected to one connector 40 outside the case 30 (see the first region R1 in FIG. 1).
  • the space between the introduction pipe 22 and the connector 40 is sealed by the first sealing member 50.
  • the connector 40 has a tubular pipe portion 41 that communicates with the introduction pipe 22, and a flange portion 45 that is fixed to the case 30 by a plurality of fastening members 8.
  • the pipe portion 41 and the flange portion 45 are both made of a metal material and are integrally joined. Therefore, the connector 40 is made of a metal material.
  • a metal material of the connector 40 a stainless steel material having high corrosion resistance to a refrigerant can be typically used.
  • the pipe portion 41 sandwiches an inner cylinder portion 42 having an inner diameter larger than the outer diameter of the introduction pipe 22, a disc-shaped protruding portion 43 protruding outward in the radial direction from the inner cylinder portion 42, and an inner cylinder portion 42. It has a protrusion 44 that protrudes outward in the radial direction from a position opposite to the protrusion 43.
  • the tip of the introduction pipe 22 is inserted inside the inner cylinder portion 42 of the pipe portion 41. Further, an external pipe E (see FIG. 1) communicating with the introduction pipe 22 is connected to the pipe portion 41. Therefore, the pipe portion 41 constitutes a substantial connector 40.
  • the flange portion 45 includes a cylindrical outer cylinder portion 46 arranged on the outer periphery of the inner cylinder portion 42 of the pipe portion 41, a disc-shaped flange portion 48 extending radially outward from the outer cylinder portion 46, and the flange portion 45.
  • the in-cylinder space of the outer cylinder portion 46 is configured as an insertion hole 47 into which the inner cylinder portion 42 of the pipe portion 41 is inserted. Therefore, the outer cylinder portion 46 becomes the opening edge portion of the insertion hole 47.
  • the flange portion 48 is provided with a plurality of mounting holes 48a into which the shaft portion of the fastening member 8 is inserted.
  • the outer cylinder portion 46 is provided adjacent to the outer cylinder portion 46 of the pipe portion 41, and both are sandwiched between the protruding portion 43 and the protruding portion 44 protruding outward in the radial direction. At this time, the protruding portion 43 and the protruding portion 44 regulate the relative movement of the pipe portion 41 and the flange portion 45 in the first direction X, which is the axial direction of the pipe portion 41.
  • the first sealing member 50 includes a tubular portion 51 as a connector-side tubular portion, a disc-shaped flange portion 52 extending radially outward from the tubular portion 51, and a first protrusion for watertight sealing. It has a protruding portion 53 as a portion and a protruding portion 54 as a second protruding portion for watertight sealing.
  • the first sealing member 50 is simply referred to as a "sealing member 50".
  • the sealing member 50 has a metal core material 50a that forms a skeleton portion, and a resin portion that covers the periphery of the core material 50a with a resin material.
  • the protruding portions 53 and 54 of the sealing member 50 are formed by resin portions around the core material 50a.
  • the sealing member 50 is assembled to the case 30 together with the connector 40 in a state of being inserted in the insertion direction D2 with respect to the connector 40.
  • the tubular portion 51 of the sealing member 50 is interposed between the inner peripheral surface 40a of the connector 40 and the outer peripheral surface 22a of the introduction pipe 22.
  • the flange portion 52 is arranged so as to sandwich the protruding portion 43 of the pipe portion 41 with the flange portion 45 in the first direction X.
  • the projecting portion 53 is configured as an annular projecting portion that projects radially outward from the tubular portion 51 toward the inner peripheral surface 40a of the connector 40.
  • the cross-sectional shape of the protruding portion 53 with respect to the plane determined by the first direction X and the third direction Z is a substantially trapezoidal shape such that the width of the first direction X gradually decreases outward in the radial direction. Therefore, the trapezoidal lip seal structure is formed by the protruding portion 53.
  • the protruding portion 53 comes into contact with the inner peripheral surface 40a of the connector 40. At this time, the protruding portion 53 is compressed by the inner peripheral surface 40a of the connector 40 and elastically deformed to exhibit watertight sealing performance.
  • the protruding portion 54 is configured as an annular protruding portion that protrudes inward in the radial direction from the tubular portion 51 toward the outer peripheral surface 22a of the introduction pipe 22.
  • the protruding portion 54 is provided on an arm portion extending to the right in FIG. 5 from a portion corresponding to the right tip portion of the core material 50a as a whole.
  • the cross-sectional shape of the arm portion with respect to the plane determined by the first direction X and the third direction Z is such that two annular protrusions 54 are arranged apart from each other in the first direction X. Therefore, a double lip seal structure is formed by the two protrusions 54.
  • each of the protrusions 54 When the two protrusions 54 come into contact with the outer peripheral surface 22a of the introduction pipe 22, each of the protrusions 54 is compressed by the outer peripheral surface 22a of the introduction pipe 22 and elastically deformed to exhibit watertight sealing performance.
  • the arm portion By lengthening the flexible resin arm portion in the protruding portion 54, the arm portion elastically deforms following the eccentricity of the introduction pipe 22 to maintain high watertight sealing performance. Can be done.
  • the protruding portion 54 having such a shape is excellent in followability to the eccentricity of the introduction pipe 22.
  • Both the protruding portion 53 and the protruding portion 54 have a shape in which the protruding portion is elongated in the circumferential direction in an annular shape, and extend on a plane determined by the second direction Y and the third direction Z.
  • one protruding portion 53 is arranged on the outer surface of the tubular portion 51, and two protruding portions 54 are arranged on the inner surface of the tubular portion 51 at intervals in the first direction X.
  • the number, arrangement, and shape of the protrusions 53 and 54 are not limited to the above, and can be appropriately changed as needed. That is, the number of protrusions 53 and 54 may be the same, or the number of protrusions 53 and 54 may be different. Further, as the cross-sectional shape of the protruding portion 53, a shape such as a rectangle in which the width of the first direction X is substantially constant can be adopted. In order to improve the sealing performance, it is preferable to increase the number of the protrusions 53 and 54.
  • the second sealing member 60 seals between the through hole 31 of the case 30 and the introduction pipe 22 at a position closer to the cooling pipe 21 of the cooler 20 than the sealing member 50 in the first direction X. It is provided.
  • the second sealing member 60 is configured as a separate member from the sealing member 50.
  • the second sealing member 60 includes a tubular portion 61 as a case-side tubular portion, a disc-shaped flange portion 62 extending radially outward from the tubular portion 61, and a first airtight sealing member. It has a protruding portion 63 as a protruding portion and a protruding portion 64 as a second protruding portion for airtight sealing.
  • the second sealing member 60 is simply referred to as a “sealing member 60”.
  • the sealing member 60 has a metal core material 60a forming a skeleton portion and a resin portion that covers the periphery of the core material 60a with a resin material.
  • the protruding portions 63 and 64 of the sealing member 60 are formed by resin portions around the core material 60a.
  • the sealing member 60 is assembled to the case 30 by being inserted into the case 30 in the insertion direction D1.
  • the tubular portion 61 of the sealing member 60 is interposed between the inner peripheral surface 31a of the through hole 31 of the case 30 and the outer peripheral surface 22a of the introduction pipe 22.
  • the collar portion 62 is arranged so as to abut from the outside on the end surface 32 of the case 30 in the first direction X.
  • the insertion direction D1 of the sealing member 60 corresponds to the insertion direction D1 of the sealing member 50. Further, the insertion direction D2 of the sealing member 60 corresponds to the insertion direction D2 of the sealing member 50.
  • the flange portion 62 of the sealing member 60 is provided so as to overlap the flange portion 52 of the sealing member 50 in the insertion direction D1 of the sealing member 50.
  • the flange portion 62 is sized so as to overlap the flange portion 52 of the sealing member 50 in the insertion direction D1.
  • the flange portion 62 becomes a first sealing member regulating portion that regulates the movement of the sealing member 50 in the insertion direction D1.
  • the sealing member 50 is less likely to come off, and the watertight sealing performance of the sealing member 50 can be maintained.
  • the projecting portion 63 is configured as an annular projecting portion that projects radially outward from the tubular portion 61 toward the inner peripheral surface 31a of the through hole 31 of the case 30.
  • the cross-sectional shape of the protruding portion 63 with respect to the plane determined by the first direction X and the third direction Z is a substantially trapezoidal shape such that the width of the first direction X gradually decreases outward in the radial direction. Therefore, the trapezoidal lip seal structure is formed by the protruding portion 63.
  • the protruding portion 63 comes into contact with the inner peripheral surface 31a of the through hole 31. At this time, the protruding portion 63 is compressed by the inner peripheral surface 31a of the through hole 31 and elastically deformed to exhibit airtight sealing performance.
  • the hooking portion 63a exerts a function of preventing the sealing member 60 from coming off by being hooked on the locking portion 33 of the case 30.
  • the locking portion 33 of the case 30 is chamfered with a C chamfered corner.
  • the locking portion 33 may be provided in an annular shape in the circumferential direction, or may be partially provided in the circumferential direction.
  • the protruding portion 64 is configured as an annular protruding portion that protrudes inward in the radial direction from the tubular portion 61 toward the outer peripheral surface 22a of the introduction pipe 22.
  • the protruding portion 64 is provided on an arm portion extending to the right in FIG. 5 from a portion corresponding to the left tip portion of the core material 60a as a whole.
  • the cross-sectional shape of the plane determined by the first direction X and the third direction Z is such that two annular protrusions 64 are arranged so as to be separated from each other in the first direction X. Therefore, a double lip seal structure is formed by the two protrusions 64.
  • each of the protrusions 64 When the two protrusions 64 come into contact with the outer peripheral surface 22a of the introduction pipe 22, each of the protrusions 64 is compressed by the outer peripheral surface 22a of the introduction pipe 22 and elastically deformed to exhibit airtight sealing performance.
  • the arm portion By lengthening the flexible resin arm portion in the protruding portion 64, the arm portion elastically deforms following the eccentricity of the introduction pipe 22 to maintain high watertight sealing performance. Can be done.
  • the protruding portion 64 having such a shape is excellent in followability to the eccentricity of the introduction pipe 22.
  • Both the protruding portion 63 and the protruding portion 64 have a shape in which the protruding portion is extended in the circumferential direction in an annular shape, and extend on a plane determined by the second direction Y and the third direction Z.
  • one protruding portion 63 is arranged on the outer surface of the tubular portion 61, and two protruding portions 64 are arranged on the inner surface of the tubular portion 61 at intervals in the first direction X. Further, each of the two protrusions 63 and each of the two protrusions 64 are configured to overlap each other in the third direction Z.
  • the number, arrangement, and shape of the protrusions 63 and 64 are not limited to the above, and can be appropriately changed as needed. That is, the number of protrusions 63 and 64 may be the same, or the number of protrusions 63 and 64 may be different. Further, as the cross-sectional shape of the protruding portion 63, a shape such as a rectangle in which the width of the first direction X is substantially constant can be adopted. In order to improve the sealing performance, it is preferable to increase the number of the protrusions 63 and 64.
  • the protrusion 54 of the sealing member 50 is larger than the protrusion 53 in order to enhance the sealing performance on the introduction pipe 22 side having a lower corrosion resistance.
  • the number of protrusions 64 can be increased in the sealing member 60, or the number of protrusions 64 can be increased more than that of the protrusions 63.
  • a gap 55 in the first direction X is formed between the first facing surface 52a of the flange portion 52 of the sealing member 50 and the second facing surface 62a of the flange portion 62 of the sealing member 60.
  • the first facing surface 52a and the second facing surface 62a face each other in the first direction X.
  • the gap 55 constitutes a refrigerant discharge path leading from the space between the sealing member 50 and the outer peripheral surface 22a of the introduction pipe 22 to the outside of the case 30.
  • the gap 55 has a function of discharging the refrigerant to the outside of the case 30 when the refrigerant flows into the space on the outer peripheral surface 22a side of the introduction pipe 22. According to the gap 55, it is possible to prevent the refrigerant from flowing into the case 30.
  • the first facing surface 52a of the sealing member 50 is provided with a plurality of refrigerant discharge grooves 52b recessed in the axial direction, which is the first direction X.
  • the plurality of refrigerant discharge grooves 52b are arranged at substantially equal intervals in the circumferential direction.
  • Each refrigerant discharge groove 52b secures a path through which the refrigerant can flow even when the first facing surface 52a of the sealing member 50 and the second facing surface 62a of the sealing member 60 come into contact with each other due to the pressure of the refrigerant or the like. Is for.
  • the refrigerant that has flowed into the space on the outer peripheral surface 22a side of the introduction pipe 22 is indicated by the arrow in FIG.
  • the refrigerant can be discharged to the outside of the case 30 through the refrigerant discharge grooves 52b.
  • the number and shape of the refrigerant discharge grooves 52b are not limited to those shown in FIG. 6, and can be appropriately changed as needed.
  • the number of refrigerant discharge grooves 52b can be set to one.
  • a refrigerant discharge groove corresponding to the refrigerant discharge groove 52b may be provided on the second facing surface 62a of the sealing member 60.
  • the refrigerant discharge groove can be provided on at least one of the first facing surface 52a of the sealing member 50 and the second facing surface 62a of the sealing member 60.
  • the discharge pipe 23 as a refrigerant flow pipe is inserted through a through hole 31 formed through the case 30 like the introduction pipe 22, and the tip portion protrudes to the outside of the case 30. It is configured to do.
  • the discharge pipe 23 is configured to be connected to a connector 40 similar to that of the introduction pipe 22 outside the case 30 (see the second region R2 in FIG. 1).
  • the space between the discharge pipe 23 and the connector 40 is sealed by a sealing member 50 similar to that of the introduction pipe 22.
  • the connector 40 is configured such that the tubular pipe portion 41 communicates with the discharge pipe 23.
  • the inner cylinder portion 42 of the pipe portion 41 has an inner diameter that exceeds the outer diameter of the discharge pipe 23.
  • the tip of the discharge pipe 23 is inserted inside the inner cylinder portion 42.
  • an external pipe E (see FIG. 1 omitted) communicating with the discharge pipe 23 is connected to the pipe portion 41.
  • the sealing member 50 and the sealing member 60 are the same as in the case of the introduction pipe 22, and only the differences will be described.
  • the tubular portion 51 of the sealing member 50 is interposed between the inner peripheral surface 40a of the connector 40 and the outer peripheral surface 23a of the discharge pipe 23.
  • the protruding portion 53 projects radially outward from the tubular portion 51 toward the inner peripheral surface 40a of the connector 40, and the protruding portion 54 protrudes outward from the tubular portion 51 toward the outer peripheral surface of the discharge pipe 23. It protrudes inward in the radial direction toward 23a.
  • the tubular portion 61 of the sealing member 60 is interposed between the inner peripheral surface 31a of the through hole 31 of the case 30 and the outer peripheral surface 23a of the discharge pipe 23.
  • the projecting portion 63 projects radially outward from the tubular portion 61 toward the inner peripheral surface 31a of the through hole 31 of the case 30, and the projecting portion 64 projects from the tubular portion 61 to the discharge pipe. It projects inward in the radial direction toward the outer peripheral surface 23a of the 23.
  • the gap 55 formed between the sealing member 50 and the sealing member 60 constitutes a refrigerant discharge path leading from the space on the outer peripheral surface 23a side of the discharge pipe 23 to the outside of the case 30.
  • the gap 55 has a function of discharging the refrigerant to the outside of the case 30 when the refrigerant flows into the space on the outer peripheral surface 23a side of the discharge pipe 23.
  • the sealing member 50 is pre-assembled to the connector 40 and the sealing member 60 is pre-assembled to the case 30 before connecting the connector 40 to the introduction pipe 22 protruding from the case 30. ..
  • the sealing member 50 is assembled to the connector 40 by pushing the tubular portion 51 inserted into the cylinder of the connector 40 in the insertion direction D2 until the flange portion 52 abuts on the connector 40. At this time, the protruding portion 53 of the sealing member 50 slides on the inner peripheral surface 40a of the connector 40.
  • the sealing member 60 pushes the tubular portion 61 inserted into the through hole 31 of the case 30 after being inserted into the introduction pipe 22 in the insertion direction D1 until the flange portion 62 abuts on the case 30, thereby pushing the case 30. It is assembled to. At this time, the protruding portion 63 of the sealing member 60 slides on the inner peripheral surface 31a of the through hole 31 of the case 30, and the protruding portion 64 of the sealing member 60 slides on the outer peripheral surface 22a of the introduction pipe 22.
  • the sealing member 60 is hooked on the locking portion 33 by the hooking portion 63a formed by protruding outward in the radial direction from the protruding portion 63. It is locked to the case 30.
  • the locking portion 33 of the case 30 functions as a second sealing member regulating portion that regulates the movement of the sealing member 60 in the insertion direction D2 by being caught by the hooking portion 63a of the protruding portion 63. Fulfill. Further, since the locking portion 33 is C-chamfered, it is effective in preventing damage to the sealing member 60.
  • the case 30 and the connector 40 are brought close to each other, and the introduction pipe 22 is inserted into the tubular portion 51 of the sealing member 50.
  • the protruding portion 54 of the sealing member 50 slides on the outer peripheral surface 22a of the introduction pipe 22.
  • the connector 40 is fastened to the case 30 via the fastening member 8 inserted into the mounting hole 48a of the flange portion 45 (see FIG. 5).
  • the cooling tube 21 which is the heat exchange unit of the cooler 20 can exchange heat with the semiconductor module 10 incorporating the switching element 11.
  • the connector 40 is connected to each of the introduction pipe 22 and the discharge pipe 23 of the cooler 20 outside the case 30.
  • the protruding portion 53 of the sealing member 50 comes into contact with the inner peripheral surface 40a of the connector 40, and the protruding portion 54 of the sealing member 50 comes into contact with the outer peripheral surface 22a of the introduction pipe 22.
  • the introduction pipe 22 and the connector 40 are watertightly sealed.
  • the protruding portion 53 of the sealing member 50 comes into contact with the inner peripheral surface 40a of the connector 40, and the protruding portion 54 of the sealing member 50 is the outer peripheral surface of the discharge pipe 23. By abutting on the 23a, the discharge pipe 23 and the connector 40 are watertightly sealed.
  • the sealing member 50 is configured such that the protruding portion 53 and the protruding portion 54 project from the tubular portion 51 in opposite directions to each other.
  • the protruding portion 53 is pressed against the inner peripheral surface 40a of the connector 40
  • the protruding portion 54 is pressed against the outer peripheral surface 22a of the introduction pipe 22 to seal the connector 40, and both the protruding portion 53 and the protruding portion 54 are tubular. It can be supported by the section 51.
  • the protruding portion 53 is pressed against the inner peripheral surface 40a of the connector 40, and the protruding portion 54 is pressed against the outer peripheral surface 23a of the discharge pipe 23 to be watertightly sealed, and both the protruding portion 53 and the protruding portion 54 are tubular. It can be supported by the shape portion 51.
  • Such a sealing member 50 is excellent in watertight sealing performance between the introduction pipe 22 and the connector 40, and in terms of watertight sealing performance between the discharge pipe 23 and the connector 40.
  • the length of the sealing region in the first direction X can be secured to be long, and the sealing member is watertightly sealed as compared with a sealing member such as an O-ring. Performance can be improved.
  • the sealing member 50 seals between each of the introduction pipe 22 and the discharge pipe 23 and the connector 40 outside the case 30, and the sealing performance of the sealing member 50 may be deteriorated. Even when a problem occurs, the refrigerant that has passed through the sealing region by the protruding portion 53 of the sealing member 50 and the sealing region by the protruding portion 54 does not flow into the inside of the case 30 as it is. Can be leaked to the outside of.
  • the power conversion device 1 capable of preventing the refrigerant of the cooler 20 from flowing into the case 30 accommodating the semiconductor module 10.
  • the protruding portion 63 of the sealing member 60 hits the inner peripheral surface 31a of the through hole 31 of the case 30.
  • the protruding portion 64 of the sealing member 60 is in contact with the outer peripheral surface 22a of the introduction pipe 22, the through hole 31 of the case 30 and the introduction pipe 22 are hermetically sealed.
  • the protruding portion 63 of the sealing member 60 comes into contact with the inner peripheral surface 31a of the through hole 31 of the case 30, and the sealing member 60
  • the protruding portion 64 comes into contact with the outer peripheral surface 23a of the discharge pipe 23
  • the through hole 31 of the case 30 and the discharge pipe 23 are hermetically sealed.
  • the sealing member 60 is configured such that the protruding portion 63 and the protruding portion 64 project from the tubular portion 61 in opposite directions to each other.
  • the protruding portion 63 is pressed against the inner peripheral surface 31a of the through hole 31, and the protruding portion 64 is pressed against the outer peripheral surface 22a of the introduction pipe 22 to airtightly seal the protruding portion 63 and both the protruding portion 64. It can be supported by the tubular portion 61.
  • the protrusion 63 is pressed against the inner peripheral surface 31a of the through hole 31, and the protrusion 64 is pressed against the outer peripheral surface 23a of the discharge pipe 23 to airtightly seal the protrusion 63 and both parts of the protrusion 64. It can be supported by the tubular portion 61.
  • Such a sealing member 60 is excellent in the airtight sealing performance between the through hole 31 and the introduction pipe 22, and the airtight sealing performance between the through hole 31 and the discharge pipe 23.
  • the flange portion 62 of the sealing member 60 is assembled to the connector 40 by being configured so as to overlap the flange portion 52 of the sealing member 50 in the insertion direction D1.
  • the flange portion 62 of the sealing member 60 can regulate the movement of the sealing member 50 in the insertion direction D1 under the influence of, for example, the pressure of the refrigerant.
  • the locking portion 33 regulates the movement of the sealing member 60 assembled to the case 30 in the insertion direction D2. be able to.
  • the gap 55 between the sealing member 50 and the sealing member 60 by providing the gap 55 between the sealing member 50 and the sealing member 60, the refrigerant that has flowed into the space on the outer peripheral surface 23a side of the discharge pipe 23 passes through the gap 55. It is guided to the outside of the case 30. Therefore, by utilizing this gap 55, the effect of preventing the refrigerant that has passed through the sealing region by the protruding portion 53 of the sealing member 50 and the sealing region by the protruding portion 54 from flowing into the case 30 is enhanced.
  • the strength of the connector 40 itself can be increased by using the connector 40 made of a metal material.
  • a backup ring for pressure resistance that is generally used together when a sealing member such as an O-ring is used. There is no need to prepare a separate member such as. Therefore, it is possible to prevent the number of parts from increasing.
  • the portion corresponding to this regulating portion is introduced into the introduction pipe 22 or discharged.
  • the structure provided in the pipe 23 can also be adopted.
  • the plurality of refrigerant discharge grooves 52b provided on the first facing surface 52a of the sealing member 50 can be omitted as necessary.
  • the power conversion device 101 of the second embodiment has the structure of the introduction pipe 22, the discharge pipe 23, the case 30, the sealing member 50, and the sealing member 60 of the first embodiment. It's different from the one. Others are the same as in the first embodiment.
  • the introduction pipe 22 is provided with a step portion 22b.
  • the step portion 22b is a first sealing member regulating portion that regulates the movement of the sealing member 50 in the insertion direction D1.
  • the step portion 22b is composed of a boundary portion between two tubular portions having relatively different outer diameters. Further, the locking portion 33 of the case 30 is omitted.
  • the three protrusions 53 are arranged on the outer surface of the tubular portion 51 at intervals in the first direction X, and the three protrusions 54 are spaced apart from each other in the first direction X. It is placed on the inner surface of. Further, each of the three protrusions 53 and each of the three protrusions 54 are configured to overlap each other in the third direction Z. Further, the refrigerant discharge groove 52b of the sealing member 50 is omitted.
  • the two protrusions 63 are arranged on the outer surface of the tubular portion 61 with a gap in the first direction X, and the two protrusions 64 are spaced apart from each other in the first direction X. It is placed on the inner surface of. Further, each of the two protrusions 63 and each of the two protrusions 64 are configured to overlap each other in the third direction Z.
  • the discharge pipe 23 is the first seal that regulates the movement of the sealing member 50 in the insertion direction D1 as in the case of the introduction pipe 22. It is provided with a stepped portion 23b as a regulating portion for a stop member.
  • variations can be increased for each shape of the sealing member 50 and the sealing member 60.
  • the step portion 22b is provided on the introduction pipe 22 and the step portion 23b is provided on the discharge pipe 23, so that the sealing member 50 assembled to the connector 40 is, for example, the pressure of the refrigerant.
  • the stepped portions 22b and 23b can regulate the movement in the insertion direction D1 under the influence of such factors.
  • the power conversion device 201 of the third embodiment is different from that of the second embodiment in the structure of the sealing member 50. Others are the same as in the second embodiment.
  • the protruding portion 54 of the sealing member 50 is a lip-shaped seal that protrudes inward in the radial direction from the tip end portion (right end portion in FIG. 11) of the tubular portion 51 toward the outer peripheral surface 22a of the introduction pipe 22 as a whole. It is configured as a stop.
  • the protruding portion 54 has a first annular portion 54a extending from the tubular portion 51 toward the sealing member 60 side in the first direction X, and a second annular portion 54a extending in the opposite direction from the extending tip portion of the first annular portion 54a. It is composed of an annular portion 54b. That is, the protruding portion 54 has a folded shape as if it were folded back at the extending tip portion of the first annular portion 54a.
  • the second annular portion 54b comes into contact with the outer peripheral surface 22a of the introduction pipe 22.
  • the protruding portion 54 exhibits a watertight sealing performance by elastically deforming the second annular portion 54b by being compressed by the outer peripheral surface 22a of the introduction pipe 22.
  • the contact area for watertight sealing is achieved by bringing the second annular portion 54b of the protrusion 54 into contact with the outer peripheral surface 22a of the introduction pipe 22 in the sealing member 50. Can be increased.
  • a lip-shaped sealing portion in which the second annular portion 54b is omitted in the protruding portion 54 of the sealing member 50 can also be adopted. Further, the lip-shaped sealing portion can be applied to at least one of the protruding portion 54 of the sealing member 50 and the protruding portion 64 of the sealing member 60.
  • the power conversion device 301 of the fourth embodiment is different from that of the second embodiment in that a sealing body in which the sealing member 50 and the sealing member 60 are integrated is used. .. Others are the same as in the second embodiment.
  • a through hole 57 as a refrigerant discharge path is provided at the boundary portion 56 between the sealing member 50 and the sealing member 60.
  • the boundary portion 56 is composed of a flange portion 52 of the sealing member 50 and a flange portion 62 of the sealing member 60.
  • the through hole 57 is configured to communicate with the outside of the case 30 from the space between the sealing member 50 and the outer peripheral surface 22a of the introduction pipe 22.
  • This sealing body is pre-assembled to the connector 40 and made into a sub-assy by inserting the tubular portion 51 of the sealing member 50 into the cylinder of the connector 40.
  • the number of parts can be reduced by integrating the sealing member 50 and the sealing member 60. Further, by assembling the sealing body to the connector 40 in advance to form a sub-assy, the assembling man-hours can be reduced as compared with the case where each of the sealing member 50 and the sealing member 60 is assembled.
  • the sealing member 50 and the sealing member 60 are integrated, when the refrigerant flows into the space on the outer peripheral surface 22a side of the introduction pipe 22, the refrigerant is discharged to the outside of the case 30 through the through hole 57. By doing so, it is possible to prevent the refrigerant from flowing into the case 30.
  • the power conversion device 401 of the fifth embodiment is different from that of the second embodiment in that the introduction pipe 22 does not have the stepped portion 22b (see FIG. 5). Others are the same as in the second embodiment.
  • the structure of the introduction pipe 22 can be simplified by omitting the portion corresponding to the step portion 22b in the introduction pipe 22.
  • the power conversion device 501 of the sixth embodiment is different from that of the second embodiment in that it does not include the sealing member 60 (see FIG. 7). Others are the same as in the second embodiment.
  • a gap 58 in the first direction X is formed between the flange portion 52 of the sealing member 50 and the end surface 32 of the case 30.
  • the gap 58 constitutes a refrigerant discharge path leading from the space between the sealing member 50 and the outer peripheral surface 22a of the introduction pipe 22 to the outside of the case 30.
  • the gap 58 has a function of discharging the refrigerant to the outside of the case 30 when the refrigerant flows into the space on the outer peripheral surface 22a side of the introduction pipe 22. According to the gap 58, it is possible to prevent the refrigerant from flowing into the case 30.
  • the number of parts of the power conversion device 501 can be reduced as compared with the second embodiment.
  • the power conversion device 601 of the seventh embodiment is different from that of the first embodiment in terms of the structure of the connector 40.
  • the connector 40 is configured as an integrally molded product having a pipe portion 41 and a flange portion 45. Others are the same as in the second embodiment.
  • the structure of the connector 40 can be simplified.
  • the connector 40 is connected to each of the introduction pipe 22 and the discharge pipe 23 of the cooler 20 , but instead of this, the connector 40 is connected to either the introduction pipe 22 or the discharge pipe 23. And a connector having a structure different from that of the connector 40 may be connected to either one of them.
  • the connector 40 made of a metal material has been illustrated, but instead of this, the connector 40 made of a material different from the metal material such as a resin material can be adopted.
  • the case where the core materials 50a and 60a are covered with the resin portion in the sealing members 50 and 60 has been illustrated, but instead, the core materials 50a and 60a are omitted and only the resin portion is used.
  • the sealing member may be formed.
  • the sealing member 50 has the collar portion 52 and the sealing member 60 has the collar portion 62 has been illustrated, but instead, the collar portion 52 is omitted in the sealing member 50. It is also possible to adopt a structure in which the flange portion 62 is omitted in the sealing member 60.
  • the laminated cooler 20 for cooling the plurality of semiconductor modules 10 has been illustrated, but the heat exchange unit capable of exchanging heat with the semiconductor module and the introduction pipe for introducing the refrigerant into the heat exchange unit.
  • the structure of the cooler is not limited to the laminated type as long as it has a discharge pipe for discharging the refrigerant from the heat exchange section, and a cooler having a different structure may be adopted if necessary. it can.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
PCT/JP2020/015763 2019-04-26 2020-04-08 電力変換装置 Ceased WO2020217983A1 (ja)

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JP2019086338A JP6981447B2 (ja) 2019-04-26 2019-04-26 電力変換装置

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WO2025258273A1 (ja) * 2024-06-12 2025-12-18 株式会社デンソー 電力変換装置、および、その製造方法

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WO2025258273A1 (ja) * 2024-06-12 2025-12-18 株式会社デンソー 電力変換装置、および、その製造方法

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US20220046832A1 (en) 2022-02-10

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