WO2017163810A1

WO2017163810A1 - Inverter-integrated electric compressor

Info

Publication number: WO2017163810A1
Application number: PCT/JP2017/008388
Authority: WO
Inventors: 一重片桐; 幹生小林
Original assignee: サンデン・オートモーティブコンポーネント株式会社
Priority date: 2016-03-24
Filing date: 2017-02-24
Publication date: 2017-09-28
Also published as: CN109072894B; CN109072894A; JP6767761B2; JP2017172512A; DE112017000754T5

Abstract

Provided is an inverter-integrated electric compressor for which the connection structure of a power supply harness suppling power to an inverter circuit unit is improved, and reliability is improved. This inverter-integrated electric compressor is equipped with connector bus bars 33 one end of each of which is electrically connected to an inverter circuit unit 3, and high-power-use connectors 28 attached to the outer surface of a housing 2 via an insulating case member 25. The one end of each connector bus bar is connected while the other end of each proceeds into the interior of the case member and movably makes contact with the respective high-power-use connecter. A power supply harness 30 is secured to the high-power-use connectors, thereby electrically connecting the power supply harness and the other end of each connector bus bar.

Description

Inverter-integrated electric compressor

The present invention relates to an inverter-integrated electric compressor having an inverter circuit portion in a housing.

2. Description of the Related Art Conventionally, as an electric compressor used in a vehicle air conditioner, an inverter-integrated electric compressor in which an inverter circuit portion is attached to a housing is used in consideration of switching noise. This inverter circuit portion is housed in a housing portion formed in the housing, and is fed by a power harness from a vehicle battery (power source).
In this case, conventionally, a method of soldering a terminal to which the power harness is connected to the substrate of the inverter circuit unit and connecting the power harness to the terminal with a connector has been adopted (for example, see Patent Document 1).

JP 2014-176160 A

However, when the terminals are soldered to the inverter circuit board as in the prior art, especially when used at a high current (high power), the cross-sectional area is increased in order to flow a high current, thereby strengthening the connection. There is a need. Therefore, there is a problem that residual stress is easily generated in each connection component including the substrate and the soldered portion, and the reliability is lowered.
The present invention has been made to solve the conventional technical problems, and an inverter-integrated electric compressor that has improved reliability by improving the connection structure of a power supply harness that supplies power to the inverter circuit section. The purpose is to provide.

The inverter-integrated electric compressor of the present invention includes a housing with a built-in motor and an inverter circuit unit that supplies power to the motor, and one end is directly connected to the inverter circuit unit or a predetermined power supply path member. The connector bus bar is connected to the outer surface of the housing via an insulating case member, and a high power connector is secured to the power harness. The other end of the connector bus bar enters the case member. The one end is connected to the high power connector so that it can move or close to the high power connector, and the power harness is fixed to the high power connector. The end is conducted.
The inverter-integrated electric compressor according to a second aspect of the invention is characterized in that, in the above invention, the other end of the connector bus bar is engaged with the high power connector so as to be movable.
The inverter-integrated electric compressor according to a third aspect of the present invention is characterized in that, in each of the above-described inventions, one end of the connector bus bar is connected to the inverter circuit portion or the power supply path member by screws.
According to a fourth aspect of the present invention, there is provided an inverter-integrated electric compressor including a male screw portion provided at one end of the connector bus bar in the above invention, and the male screw portion is a screw formed on the inverter circuit portion or the power supply path member. The connector bus bar is connected to the inverter circuit portion or the power feeding path member by a nut screwed into the male screw portion in the state of entering the hole.
According to a fifth aspect of the present invention, there is provided an inverter-integrated electric compressor, wherein the inverter circuit portion is housed in an inverter housing portion configured in a housing, and the inverter housing portion is closed by a lid member and The housing portion has a communication portion communicating with the outside in a state of being closed by the lid member, and a part of the inverter circuit portion or the power supply path member is located in the communication portion, and the connector bus bar is electrically connected to the inverter circuit portion. In this state, the communication portion is blocked by the case member.
According to a sixth aspect of the present invention, there is provided the inverter-integrated electric compressor. In the above-described invention, the case member is connected to the insulating bus bar case in which one end of the connector bus bar is accommodated to close the communication portion, and is connected to the bus bar case. And the other end of the connector bus bar penetrates the bus bar case and enters the connector case, and the bus bar case and the connector case around the portion where the connector bus bar penetrates. A seal member that waterproofs the space is provided.

According to the present invention, in an inverter-integrated electric compressor including a housing in which a motor is built and an inverter circuit unit that supplies power to the motor, one end is directly connected to the inverter circuit unit or via a predetermined power supply path member. The connector bus bar includes a high-power connector that is attached to the outer surface of the housing via an insulating case member and is secured to the power harness, and the other end of the connector bus bar enters the case member. One end is connected in a state where the power connector is movably in contact with or close to the power connector, and the power harness is fixed to the high power connector so that the power harness and the other end of the connector bus bar are connected. Since the electrical connection is made, the connector bus bar is not connected to the high power connector or power harness, One end of the inverter circuit portion of Kutabasuba, or, it is possible to connect to the power supply path member.
As a result, when assembling the inverter-integrated electric compressor, the position of the connector bus bar can be adjusted even if the positional relationship between one end of the connector bus bar and the inverter circuit section or the connection part of the power supply path member is shifted due to dimensional variations, etc. By doing so, it becomes possible to absorb the positional deviation of the connection location and match the two. That is, it is possible to eliminate the stress applied to the inverter circuit portion and the power supply path member when connecting one end of the connector bus bar, and the reliability can be improved. Further, by fixing the power harness to the high power connector, the other end of the connector bus bar and the high power connector or power harness can be easily conducted in the case member, so that the assembly workability is also improved. Is.
In this case, if the other end of the connector bus bar is engaged with the high power connector in a movable relationship as in the second aspect of the invention, the connector bus bar and the high power connector are positioned by the engagement relationship between the two. As a result, electrical connection with the power harness can be further ensured.
In addition, if one end of the connector bus bar is connected to the inverter circuit portion or the power supply path member by screwing as in the invention of claim 3, the contact area between the two can be increased, and a large current can be handled. Will be able to.
In this case, a male screw part is provided at one end of the connector bus bar as in the invention of claim 4, and the male screw part enters the screw hole formed in the inverter circuit part or the power supply path member. If the connector bus bar is connected to the inverter circuit unit or the power feeding path member by the nut screwed into the part, the positioning of the connector bus bar and the inverter circuit unit or the power feeding path member becomes easy.
Further, the inverter circuit portion is housed in the inverter housing portion formed in the housing as in the invention of claim 5, and this inverter housing portion is closed by the lid member, and the inverter housing portion is closed by the lid member. In a state where the communication part is connected to the outside, a part of the inverter circuit part or the power supply path member is located in the communication part, and the connector bus bar is electrically connected to the inverter circuit part. Is closed by the case member, the inverter circuit portion in the inverter accommodating portion of the housing and the high power connector can be easily conducted by the connector bus bar or via the power supply path member. become.
In this case, as in the invention of claim 6, the case member is made of an insulating bus bar case in which one end of the connector bus bar is accommodated to close the communicating portion, and an insulating member in which a high power connector is attached to the bus bar case. If the other end of the connector bus bar penetrates the bus bar case and enters the connector case, the workability when assembling the case member and the connector bus bar to the housing is extremely good. Become. If a sealing member that waterproofs between the bus bar case and the connector case around the portion where the connector bus bar penetrates is provided, a short circuit failure occurs in the connector bus bar portion due to water entering from the gap between the bus bar case and the connector case. Inconvenience can be avoided.

1 is a perspective view of an inverter-integrated electric compressor of one embodiment to which an electronic circuit device of the present invention is applied. FIG. 2 is a perspective view of a state where a cover member of the inverter-integrated electric compressor in FIG. 1 is removed. It is a top view of the inverter accommodating part of the inverter integrated electric compressor of FIG. FIG. 4 is a sectional view taken along line AA in FIG. 3. It is an enlarged view of the connector bus-bar part of FIG. It is a disassembled perspective view of the inverter circuit part and housing of the inverter integrated electric compressor of FIG. FIG. 2 is an exploded perspective view of a connector bus bar and the housing of the inverter-integrated electric compressor of FIG. 1. It is a disassembled perspective view of the connector bus-bar part of FIG. It is the disassembled perspective view seen from the bus-bar case and connector case of FIG. It is the disassembled perspective view seen from the bus-bar case and connector case of FIG.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The inverter-integrated electric compressor 1 of the embodiment constitutes a part of a refrigerant circuit of a vehicle air conditioner that air-conditions a vehicle interior of a vehicle (not shown), and is driven by a motor (not shown) and this motor. A housing 2 containing a compression mechanism (not shown) and an inverter circuit unit 3 for driving the motor are provided.
The housing 2 includes a motor housing 4 containing the motor, a compression mechanism housing 6 connected to one side in the axial direction of the motor housing 4 and containing the compression mechanism, and an opening on one side of the compression mechanism housing 6. A compression mechanism cover 7 that closes the motor housing 4, an inverter accommodating portion 8 that is configured on the other side in the axial direction of the motor housing 4, and a lid member 11 that closes the opening 9 on the other side of the inverter accommodating portion 8 so as to be openable and closable. ing. And the inverter circuit part 3 is accommodated in this inverter accommodating part 8. FIG.
In each of the drawings, the inverter-integrated electric compressor 1 of the embodiment is shown with the inverter accommodating portion 8 on the top and the compression mechanism cover 7 on the bottom, but actually, the compression mechanism cover 7 is on one side. The inverter accommodating portion 8 is arranged in the lateral direction so as to be on the other side.
The motor of the embodiment is composed of a three-phase synchronous motor (brushless DC motor), and the compression mechanism is, for example, a scroll type compression mechanism. The compression mechanism is driven by a motor, compresses the refrigerant, and discharges it into the refrigerant circuit. A low-temperature gas refrigerant sucked from an evaporator (also referred to as a heat absorber) that also forms part of the refrigerant circuit is circulated in the motor housing 4. Therefore, the inside of the motor housing 4 is cooled. And the inverter accommodating part 8 is divided with the inside of the motor housing 4 in which a motor is accommodated by the partition 12 formed in the motor housing 4, and this partition 12 is also cooled by a low temperature gas refrigerant.
(1) Configuration of Inverter Circuit Unit 3 The inverter circuit unit 3 includes a high heat dissipation substrate 14 on which a power switching element 13 constituting an arm of each phase of a three-phase inverter circuit is mounted, and a control on which a control circuit 16 is mounted. A substrate 17, a bus bar assembly 18 connected to the power switching element 13 of the high heat dissipation substrate 14, and a filter mold assembly 21 on which a smoothing capacitor 19 is mounted.
The inverter circuit unit 3 converts DC power fed from a vehicle battery (not shown) into three-phase AC power and feeds it to a stator coil (not shown) of the motor. Therefore, the connection point between the power switching element 13 on the upper arm side and the power switching element 13 on the lower arm side of each phase has three terminals on the

lead terminals

22, 23 and 24 drawn from the partition wall 12 of the motor housing 4. The power supply terminal of the power switching element 13 on the upper arm side and the ground terminal of the power switching element 13 on the lower arm side are connected to each other via the plate 26 of an insulating case member 25 described later attached to the motor housing 4. The power supply harness 30 from the battery connected to the high power connector 28 (consisting of screws) is conducted.
In this case, the lead terminals 22 to 24 to which the connection points of the upper arm side power switching element 13 and the lower arm side power switching element 13 of each phase are connected penetrate the partition wall 12 and the motor in the motor housing 4. Are connected to the aforementioned stator coil. The power supply terminal and the ground terminal are referred to as a terminal plate 29 of the filter mold assembly 21, a conductive member 31 called an EMC bus bar assembly, a conductive circuit board 32 called an EMC board, a connector bus bar 33, and an HV connector. It is connected to the power harness 30 via the above-described high power connector 28 and the like.
The case member 25 of the embodiment includes two parts, an insulating connector case 27 to which a high power connector 28 is attached and an insulating bus bar case 34 called an EMC filter case in which the connector bus bar 33 is built. These structures will be described later in detail.
(2) Configuration of the high heat dissipation board 14 The high heat dissipation board 14 is formed in a thick plate shape by a resin for molding a circuit board, and each power switching element 13 and its peripheral circuit components are arranged on one side. In addition, the power switching element 13 is configured to pass through the high heat dissipation substrate 14 and exchange heat with the other side. Note that circuit components around the power switching element 13 are also arranged on the other surface.
Further, on one surface of the high heat dissipation substrate 14, an electrode terminal (not shown) that is connected to the connection point between the power switching element 13 on the upper arm side and the power switching element 13 on the lower arm side of each phase protrudes. These are connected to the

lead terminals

22, 23 and 24 drawn from the partition wall 12 via the terminal plate 26 via bus bars 46, 47 and 48 of the bus bar assembly 18 which will be described later. Further, electrode terminals (not shown) that are connected to the power supply terminal and the ground terminal described above also protrude on one surface of the high heat dissipation substrate 14, and these pass through the bus bars 49 and 50 of the bus bar assembly 18 to be described later. It is connected to the terminal board 44 of the mold assembly 21. Furthermore, a connector 39 connected to the control circuit 16 of the control board 17 is attached to the periphery of one surface of the high heat dissipation board 14 outside the bus bar assembly 18.
(3) Configuration of Control Board 17 The control circuits 16 of the control board 17 are arranged on both sides of the control board 17 and perform switching control of each power switching element 13 of the high heat dissipation board 14 based on a command from the outside. . Also, it has a function of transmitting the motor drive state to the outside, and is configured by connecting circuit components such as a microcomputer by printed wiring. Further, a connection portion 41 to which the connector 39 of the high heat dissipation substrate 14 described above is connected is disposed around the control substrate 17.
(4) Configuration of Filter Mold Assembly 21 The smoothing capacitor 19 is connected between the power supply terminal and the ground terminal of the three-phase inverter circuit, and absorbs the high-frequency component of the switching current of the three-phase inverter circuit. The smoothing capacitor 19 is disposed on a filter mold assembly (circuit board) 21, and a terminal plate 29 of the filter mold assembly 21 is connected to a conduction member 31 as will be described later, and a conduction circuit board 32, a connector bus bar 33, and The power supply harness 30 is conductively connected through the high power connector 28 and the like, and the terminal plate 44 is connected to the electrode terminal conductive to the power supply terminal and the ground terminal of the high heat dissipation substrate 14 described above.
(5) Configuration of Bus Bar Assembly 18 The bus bar assembly 18 has five

bus bars

46, 47, 48, 49, and 50 that form wiring of a three-phase inverter circuit. Each of the bus bars 46 to 50 is disposed at a position outside the control board 17 and is integrated by insert molding of an insulating hard resin. The bus bars 46 to 48 are connected to the power switching element 13 of the high heat dissipation board 14. Each electrode terminal conducting to the connection point and each terminal plate 26 are connected, and

bus bars

49 and 50 connect the electrode terminal conducting to the power supply terminal and the ground terminal to the terminal plate 44 of the filter mold assembly 21.
(6) Assembly and assembly of inverter circuit unit 3 Next, an assembly procedure of the inverter circuit unit 3 will be described. The high heat dissipation board 14, the bus bar assembly 18, and the control board 17 with the bus bar assembly 18 sandwiched between the high heat dissipation board 14 on which the power switching element 13 and the like are mounted and the control board 17 on which the control circuit 16 is mounted. Are laminated.
In the state of being laminated in this way, each of the above-described electrode terminals constituted by screws is inserted from the other surface side of the high heat dissipation substrate 14 and penetrates the high heat dissipation substrate 14 to the bus bars 46 to 50 of the bus bar assembly 18 respectively. Screw together. Each screw terminal is electrically connected to the circuit board of the high heat dissipation board 14 and the bus bars 46 to 50 by this screwing.
Further, screws 51 and 52 are inserted from one surface side of the control board 17, penetrate the control board 17, and screw into the bus bar assembly 18. By such screwing, the high heat dissipation board 14, the bus bar assembly 18, and the control board 17 are integrated. Next, with the smoothing capacitor 19 on the high heat dissipation substrate 14 side, the terminal plate 44 of the filter mold assembly 21 is directed to one side of the bus bars 49, 50 of the bus bar assembly 18, and screws 53, 54 are inserted to insert the bus bar. The filter mold assembly 21 is screwed to the bus bar assembly 18 by being screwed to 49 and 50. In this state, the terminal plate 44 is electrically connected to the electrode terminals 42 and 43 through the bus bars 49 and 50, respectively. Thereby, the inverter circuit unit 3 including the high heat dissipation substrate 14, the control substrate 17, the bus bar assembly 18, and the filter mold assembly 21 (smoothing capacitor 19) is integrated (sub-assembly).
The inverter circuit portion 3 integrated in this way is accommodated in the inverter accommodating portion 8 of the motor housing 4 with the high heat dissipation substrate 14 as the partition wall 12 side. At this time, the other surface of the high heat dissipation substrate 14 at a position corresponding to the power switching element 13 is filled with a filler for heat conduction (such as grease), and each power switching element 13 is connected to the partition 12 through the filler. The heat exchange relationship is established. Further, the smoothing capacitor 19 is also brought into close contact with the partition wall 12 for heat exchange.
And the inverter circuit part 3 is attached to the motor housing 4 (housing 2) with a some screw | thread. Thereafter, the terminal plate 26 is attached between the

lead terminals

22, 23, 24 and the bus bars 46, 47, 48 by screwing, and is conducted. Further, the terminal plate 29 of the filter mold assembly 21 is attached to the conducting member 31 by a screw 56 to be conducted as will be described later.
(7) Configuration of Power Supply Path to Inverter Circuit Unit 3 Next, the configuration of the power supply path to the inverter circuit unit 3 will be described in detail. In the embodiment, the power supply path from the power harness 30 to the inverter circuit unit 3 includes the conductive member 31, the conductive circuit board 32, the connector bus bar 33, and the high power connector 28 described above. The conducting member 31 includes a terminal plate 61 at one end and a terminal plate 62 located at the other end and connected to the terminal plate 61. The conductive circuit board 32 is a circuit board provided with wiring, and the conductive member 31 and the conductive circuit board 32 constitute a power supply path member 63 in the present invention.
The connector bus bar 33 is made of a metal plate, and one end thereof is bent at a substantially right angle, and a male screw part 64 protruding in the longitudinal direction is provided at the bent end. In addition, the other end of the connector bus bar 33 is formed with a notch 33A having a dimension that allows the high-power connector 28 to move and come into contact therewith and be engageable. The notch 33A is formed in the connector bus bar 33. And has a predetermined length dimension in the longitudinal direction (FIGS. 7 to 10). Two such connector bus bars 33 are used. The bus bar case 34 constituting the case member 25 is made of an insulating member such as a hard resin, and has two through holes 66 through which the two

bus bars

33 and 33 are inserted.
Similarly, the connector case 27 constituting the case member 25 is also made of an insulating member such as a hard resin. Two high power connectors 28 are attached to the connector case 27, and a partition wall 27 </ b> A is formed integrally with the connector case 27 between the

high power connectors

28, 28. Each of the

high power connectors

28 and 28 is formed of a screw, and a base portion 28 </ b> A thereof is embedded in the connector case 27. The connector case 27 is formed with two insertion holes 67 extending from one surface to the bases 28A of the

high power connectors

28, 28. Further, a seal member 68 made of an O-ring is attached to one surface of the connector case 27 so as to surround the periphery of each insertion hole 67.
(8) Assembly of power feeding path and connection to inverter circuit section 3 Next, a procedure for assembling each member constituting the above power feeding path to the housing 2 (motor housing 4) will be described. A communication portion 71 is formed on the inverter housing portion 8 on the filter mold assembly 21 side so as to protrude in the radial direction of the motor housing 4. The communicating portion 71 is also opened (72) on the side opposite to the opening 9 side and is not blocked by the lid member 11. Further, the terminal plate 29 (a part of the inverter circuit unit 3) of the filter mold assembly 21 is positioned on the opening 9 side of the communication unit 71 in a state where the inverter circuit unit 3 is stored in the inverter storage unit 8.
First, the bus bar case 34 and the connector case 27 constituting the case member 25 are coupled by the screws 73 to assemble the case member 25. In this case, each insertion hole 67 of the connector case 27 corresponds to each through hole 66 of the bus bar case 34, and the seal member 68 is located between the bus bar case 34 and the connector case 27 around the insertion hole 67 and the through hole 66. Seal watertight and waterproof.
Next, the other end of the two connector bus bars 33 in which the notches 33A are formed is inserted into the through holes 66 of the bus bar case 34 and inserted into the respective insertion holes 67 of the connector case 27 to be connected to the high power connector 28. Abut (contact into the connector case 27). At this time, since the notch 33A is formed at the other end of the connector bus bar 33, the connector bus bar 33 is inserted into the notch 33A so that the high power connector 28 enters the notch 33A. Engage in a movable relationship in the direction. In addition, the conductive member 31 and the conductive circuit board 32 are assembled with screws 77. At this time, the two screw holes 78 formed in the terminal plate 62 of the conductive member 31 and the two screw holes 79 of the conductive circuit board 32 match (the connector bus bar 33 is not fixed at this time).
Next, the assembled conductive member 31 and conductive circuit board 32 are inserted into the bus bar case 34, and the male screw portions 64 of the connector bus bars 33 are respectively inserted into the screw holes 79 of the conductive circuit board 32 and the screw holes 78 of the terminal plate 62. Let it enter. Then, the nut 76 is screwed into the male screw portion 64, and one end of the connector bus bar 33 is connected to the conductive circuit board 32 and the conductive member 31 by screws and fixed. At this time, the other end of the connector bus bar 33 is not connected to the high power connector 28. Therefore, even if the positions of the male screw portion 64 and the screw holes 78 and 79 are slightly shifted due to dimensional variations, the connector bus bar 33 The position can be adjusted so that both can be matched. That is, for example, a gap is generated between one end of the connector bus bar 33 and the conductive circuit board 32 or the like due to dimensional variations in a state where the male screw portion 64 of the connector bus bar 33 is inserted into the screw holes 78 and 79. However, when the nut 76 is screwed, the connector bus bar 33 moves to the conductive circuit board 32 side. As a result, no stress is applied to the conductive circuit board 32 and the conductive member 31 when the nut 76 is connected.
That is, in this state, the other end of the connector bus bar 33 is not connected to the high power connector 28, and one end of the connector bus bar 33, the lower part of the conductive circuit board 32 and the conductive member 31 (power feeding path member 63) is the bus bar case. 34 is stored in the form. In this state, the case member 25 (the bus bar case 34 and the connector case 27) is placed on the outer surface of the motor housing 4 in such a manner that the conducting member 31 is inserted into the communicating portion 71 from the opening 72, and the case member 25 ( The bus bar case 34 and the connector case 27) are attached to the outer surface of the motor housing 4. At this time, the bus bar case 34 closes the opening 72 of the communication portion 71 and is sealed (sealed) with the motor housing 4 in a watertight manner.
In this state, the terminal plate 61 at one end of the conducting member 31 is positioned on the opening 9 side of the communication portion 71 and contacts the terminal plate 29 of the filter mold assembly 21 from the opening 72 side. The terminal plate 29 of the filter mold assembly 21 is attached to the terminal plate 61 of the conducting member 31 with screws 56 and is conducted. Even at this time, the other end of the connector bus bar 33 is not connected to the high power connector 28. Therefore, even if the positions of the terminal plate 29 and the terminal plate 61 are slightly shifted due to dimensional variations, the positions of the connector bus bar 33 and the like are adjusted. To be able to match. That is, for example, even if a gap is generated between the terminal plate 29 and the terminal plate 61 due to variation in dimensions, the entire connector bus bar 33 and the power supply path member 63 are connected to each other by screwing the screws 56 together. Move to the 29th side. As a result, no stress is applied to the filter mold assembly 21 at the time of connection by the screw 56, and it is possible to prevent inconveniences such as breakage of a soldered portion of the filter mold assembly 21. And the cover member 11 is attached to the opening 9 of the inverter accommodating part 8 with a some screw | thread, and the opening 9 of the inverter accommodating part 8 is obstruct | occluded so that opening and closing is possible.
In this way, the high power connector 28 is attached to the outer surface of the motor housing 4 (housing 2) via the insulating case member 25. Finally, the power harness 30 is inserted into each of the two high power connectors 28 and tightened with nuts 81 and fixed with screws. The power harness 30 may be fixed to the high power connector 28 by press fitting or the like instead of screwing. At this time, since the partition wall 27A is formed in the connector case 27, there is no inconvenience that the power harness 30 is short-circuited. The other end of the connector bus bar 33 is electrically connected to the power harness 30 via the high power connector 28 by tightening with the nut 81. Since the connector bus bar 33 is electrically connected to the filter mold assembly 21 via the conductive circuit board 32 and the conductive member 31, the power harness 30 is electrically connected to the inverter circuit unit 3 and supplied with power.
As described above in detail, in the present invention, in the inverter-integrated electric compressor 1 including the motor housing 4 (housing 2) containing the motor and the inverter circuit unit 3 that supplies power to the motor, one end is connected to the inverter circuit unit 3. A connector bus bar 33 that is conducted through the power supply path member 63 (the conducting member 31 and the conducting circuit board 32) and the outer surface of the motor housing 4 are attached via the insulating case member 25, and the power harness 30 is fixed. The connector bus bar 33 is provided with a high power connector 28. The other end of the connector bus bar 33 enters the case member 25 and is in contact with the high power connector 28 so as to be movable. By fixing to the high power connector 28, the power harness 30 and the other end of the connector bus bar 33 are made conductive. Thus, one end of the connector bus bar 33 is connected to the power supply path member 63 (the conductive member 31 and the conductive circuit board 32) in a state where the other end of the connector bus bar 33 is not connected to the high power connector 28 or the power harness 30. Is possible.
As a result, even when the positional relationship between one end of the connector bus bar 33 and the connection portion of the inverter circuit unit 3 or the power feeding path member 63 is shifted due to dimensional variation or the like when the inverter-integrated electric compressor 1 is assembled, the connector bus bar 33 By adjusting the position, it is possible to absorb the positional deviation of the connection location and match them. Therefore, when one end of the connector bus bar 33 is connected, the stress applied to the inverter circuit unit 3 and the power feeding path member 63 can be eliminated, and the reliability can be improved. Further, by fixing the power harness 30 to the high power connector 28, the other end of the connector bus bar 33 and the high power connector 28 and the power harness 30 can be easily conducted in the case member 25. Workability is also improved.
In this case, in the embodiment, the other end of the connector bus bar 33 is engaged with the high power connector 28 so as to be movable, so that the connector bus bar 33 and the high power connector 28 are positioned by the engagement relationship therebetween. As a result, electrical connection with the power supply harness 30 can be further ensured.
In the embodiment, one end of the connector bus bar 33 is connected to the power supply path member 63 (the conductive member 31 and the conductive circuit board 32) by screws. The connector bus bar 33 may be connected to the power supply path member 63 by soldering. However, by connecting the connector bus bar 33 with screws as in the embodiment, the contact area between the two can be increased, and a large current can be handled. become able to.
In this case, a male screw part 64 is provided at one end of the connector bus bar 33, and the male screw part 64 enters the screw holes 78 and 79 formed in the power supply path member 63 (the conductive member 31 and the conductive circuit board 32). Since the connector bus bar 33 is connected to the power supply path member 63 by the nut 76 screwed into the male screw portion 64, the positioning of the connector bus bar 33 and the power supply path member 63 is facilitated.
Further, as in the embodiment, the inverter circuit portion 3 is accommodated in the inverter accommodating portion 8 configured in the motor housing 4, and the inverter accommodating portion 8 is closed by the lid member 11, and the inverter accommodating portion 8 is When the communication portion 71 is connected to the outside in a state of being blocked by the member 11, a part of the inverter circuit unit 3 and the power supply path member 63 are arranged in the communication portion 71, and the connector bus bar 33 is connected to the power supply path member. If the communication part 71 is closed by the case member 25 in a state of being electrically connected to the inverter circuit part 3 via 63, the inverter circuit part 3 in the inverter accommodating part 8 of the motor housing 4 and the high power connector 28 can be easily conducted through the connector bus bar 33 and the power supply path member 63.
In this case, in the embodiment, the case member 25 is connected to the insulating bus bar case 34 in which one end of the connector bus bar 33 is accommodated to close the communication portion 71, and the high power connector 28 is attached to the bus bar case 34. And the other end of the connector bus bar 33 penetrates the bus bar case 34 and enters the connector case 27, so that the motor housing 4 has the case member 25 and the connector bus bar. The workability when assembling 33 is extremely good.
Since the sealing member 68 is provided to waterproof between the bus bar case 34 and the connector case 27 around the portion where the connector bus bar 33 penetrates, the connector bus bar is caused by water entering from the gap between the bus bar case 34 and the connector case 27. The inconvenience that a short-circuit failure occurs at the 33 portion can be avoided.
In the embodiment, the connector bus bar 33 is conducted to the inverter circuit section 3 through the conduction path member 63 including the conduction member 31 and the conduction circuit board 32. However, the terminal plate 29 of the filter mold assembly 21 of the inverter circuit section 3 is connected to the connector bus bar 33. The connector bus bar 33 may be directly screwed to (connected to) the terminal plate 29 (inverter circuit portion 3) by extending to the vicinity of the opening 72 of the communication portion 71. Even in that case, since the other end of the connector bus bar 33 is movable, even if the position of one end of the terminal plate 29 and the connector bus bar 33 is shifted due to the variation in dimensions, the position of the connector bus bar 33 can be adjusted, It is possible to prevent stress from being applied to the inverter circuit unit 3 at the time of screwing (connection).
In the embodiment, the other end of the connector bus bar 33 is brought into contact with and engaged with the high power connector 28. However, the present invention is not limited thereto, and when the power harness 30 is screwed (fixed) to the high power connector 28. The other end of the connector bus bar 33 may be movably brought close to the high-power connector 28 within a range in which the connector bus bar 33 can be conducted. Further, in the embodiment, the case member 25 is composed of two parts, ie, the connector case 27 and the bus bar case 34, but they may be configured as one body.
Furthermore, the shape and structure of the inverter circuit unit 3 and the motor housing 4 and the shape and structure of the power feeding path including the connector bus bar 33 shown in the embodiments are not limited thereto, and the gist of the present invention. It goes without saying that various changes can be made without departing from the scope.

DESCRIPTION OF SYMBOLS 1 Inverter integrated electric compressor 2 Housing 3 Inverter circuit part 4 Motor housing 6 Compression mechanism housing 8 Inverter accommodating part 21 Filter mold assembly 25 Case member 27 Connector case 28 Connector for high power 29 Terminal board 30 Power supply harness 31 Conductive member 32 Conductiveness Circuit board 33 Connector bus bar 63 Power feeding path member 64 Male thread portion 68 Seal member 71 Communication portion 76, 81 Nut

Claims

In an inverter-integrated electric compressor having a housing with a built-in motor and an inverter circuit unit for supplying power to the motor,
A connector bus bar whose one end is directly connected to the inverter circuit section or via a predetermined power supply path member;
It is attached to the outer surface of the housing via an insulating case member, and includes a high power connector to which a power harness is fixed.
In the state where the other end of the connector bus bar enters the case member and is movably contacted with the high power connector, or in the proximity thereof, one end is connected,
An inverter-integrated electric compressor, wherein the power harness is fixed to the high power connector, whereby the other end of the power harness and the connector bus bar are electrically connected.
2. The inverter-integrated electric compressor according to claim 1, wherein the other end of the connector bus bar is engaged with the high power connector so as to be movable.
3. The inverter-integrated electric compressor according to claim 1 or 2, wherein one end of the connector bus bar is connected to the inverter circuit section or the power supply path member by screwing.
A male screw part provided at one end of the connector bus bar,
With the male screw portion entering the screw hole formed in the inverter circuit portion or the power supply path member, the connector bus bar is connected to the inverter circuit portion or the nut by screwing into the male screw portion. The inverter-integrated electric compressor according to claim 3, wherein the inverter-integrated electric compressor is connected to the power supply path member.
The inverter circuit portion is housed in an inverter housing portion configured in the housing, and the inverter housing portion is closed by a lid member,
The inverter accommodating portion has a communication portion communicating with the outside in a state of being closed by the lid member, and a part of the inverter circuit portion or the power feeding path member is located in the communication portion, and the connector 5. The inverter-integrated electric compressor according to claim 1, wherein the communication portion is closed by the case member in a state where the bus bar is electrically connected to the inverter circuit portion. 6. .
The case member includes an insulating bus bar case that houses one end of the connector bus bar and closes the communicating portion, and an insulating connector case that is coupled to the bus bar case and to which the high power connector is attached. Consisting of
The other end of the connector bus bar penetrates the bus bar case and enters the connector case,
6. The inverter-integrated electric compressor according to claim 5, further comprising a sealing member that waterproofs between the bus bar case and the connector case around a portion where the connector bus bar penetrates.