JP5621798B2 - Electric compressor - Google Patents

Description

  The present invention relates to an electric compressor in which a compressor, an electric motor, and a motor drive circuit are housed in a housing.

  2. Description of the Related Art Conventionally, there is known an electric compressor in which a compressor that is driven by rotation of a rotating shaft, an electric motor that rotates the rotating shaft, and a motor drive circuit for driving the electric motor are housed in a housing (for example, Patent Document 1). As shown in FIG. 6, the electric motor 103a is accommodated in the motor housing 103 which comprises a part of housing. An inverter housing 108 is joined to the bottom end surface of the motor housing 103, and the motor drive circuit 101 is accommodated in a space defined by the motor housing 103 and the inverter housing 108. The motor drive circuit 101 is driven by power supplied from the external power supply 102.

  Connected to the inverter housing 108 is a cylindrical connector connecting portion 104 that protrudes outward from the outer surface thereof. In the connector connecting portion 104, a wiring connecting portion 105 for supplying electric power from the external power source 102 to the motor drive circuit 101 is disposed. A synthetic resin cluster block 106 (insulating member) is disposed between the wiring connection portion 105 and the connector connection portion 104. The cluster block 106 ensures insulation between the wiring connection portion 105 and the connector connection portion 104.

  Between the connector connecting portion 104 and the cluster block 106, an electrical wiring 107 used for another purpose other than the power supply from the external power source 102 to the motor drive circuit 101 is arranged. Examples of the electrical wiring 107 include an interlock wire described in Patent Document 2. Since such an electrical wiring 107 is connected at least at one end to a terminal connection portion (not shown) provided on the external power supply 102 side, the electrical wiring 107 is slightly connected between the connector connection portion 104 and the cluster block 106. It is common to arrange for gaps.

JP 2009-74517 A JP 2007-331606 A

  However, when the cluster block 106 is accommodated in the connector connecting portion 104, the electric wiring 107 may be bitten between the connector connecting portion 104 and the cluster block 106.

  The present invention has been made paying attention to such problems existing in the prior art, and its purpose is to suppress the biting of the electric wiring between the connector connecting portion and the insulating member. It is in providing the electric compressor which can be performed.

In order to achieve the above object, according to the first aspect of the present invention, the housing includes a compression portion, an electric motor, and a motor drive circuit, and a connector connection portion is provided on the outer surface of the housing. A wiring connection part for supplying power from an external power source to the motor drive circuit is disposed in the connector connection part, and the wiring connection part and the connector connection part are provided inside the connector connection part. An insulating member that secures insulation with respect to the motor is arranged between the inner surface of the connector connecting portion and the outer surface of the insulating member. electrical wiring to be used as is an electric compressor being routed, the insulating member is provided with outer rectangular box-like forming an opening on one side, and a partition wall for partitioning the inside, the insulation Together with the first recess is formed on an outer surface of a portion the partition wall is connected at the outer shell of the timber, the electrical wiring is routed between the insulating member and the connector connecting portion by said first recess The gist is that a planning space is formed.

  According to this invention, since the electrical wiring is routed in the routing space formed by the recess, the recess is not formed on at least one of the inner surface of the connector connecting portion and the outer surface of the insulating member. Can be prevented from being caught between the connector connecting portion and the insulating member as compared with a case where the wiring is arranged in a slight gap between the connector connecting portion and the insulating member.

According to a second aspect of the present invention, in the first aspect of the present invention, the second concave portion is formed on the inner surface of the connector connecting portion , and the arrangement is performed by combining the first concave portion and the second concave portion. The gist is that a policy space is formed.

  According to the present invention, the concave portion is formed in the connector connecting portion or the insulating member, and the routing space can be made larger than the routing space formed by the concave portion, and the connector connecting portion and the insulating member It is possible to further suppress the biting of the electric wiring between the two.

The gist of the invention described in claim 3 is the invention according to claim 1 or 2, further comprising a fixing member for fixing the electric wiring.
According to the present invention, for example, it is possible to prevent the electric wiring from moving due to vibration during traveling of the vehicle on which the electric compressor is mounted.

  According to this invention, it is possible to suppress the biting of the electric wiring between the connector connecting portion and the insulating member.

(A) is a longitudinal cross-sectional view which shows the electric compressor in embodiment, (b) is a partial longitudinal cross-sectional view which expands and shows the connector connection part periphery. AA line sectional view in Drawing 1 (b). (A) And (b) is a perspective view of a cluster block. The perspective view which shows the state by which the interlock wire in another embodiment is being fixed with the tape with respect to the cluster block. (A) is a longitudinal cross-sectional view of the connector connection part in another embodiment, (b) is a perspective view of a cluster block. The fragmentary longitudinal cross-sectional view which expands and shows the connector connection part periphery in a prior art example.

Hereinafter, an embodiment in which the present invention is embodied in an electric compressor mounted on a hybrid vehicle as a vehicle and used in a vehicle air conditioner will be described with reference to FIGS.
As shown in FIG. 1A, the housing 11 of the electric compressor 10 is formed of a metal material (aluminum in this embodiment). The housing 11 includes a bottomed cylindrical intermediate housing 12 constituting an intermediate portion of the housing 11, a discharge housing 13 joined to the open end of the intermediate housing 12, and an inverter housing joined to the bottom end face of the intermediate housing 12. 14. The intermediate housing 12 and the discharge housing 13 are fastened together with a bolt B1 via a gasket G. In addition, the intermediate housing 12 and the inverter housing 14 are fastened together by bolts B <b> 2, and a housing space 17 is defined between the intermediate housing 12 and the inverter housing 14.

  A discharge chamber 15 is defined between the intermediate housing 12 and the discharge housing 13. A discharge port 16 is formed on the end surface of the discharge housing 13, and the discharge chamber 15 is connected to an external refrigerant circuit (not shown) via the discharge port 16. A suction port (not shown) is formed on the inverter housing 14 side of the intermediate housing 12, and the inside of the intermediate housing 12 is connected to an external refrigerant circuit via the suction port.

  A rotating shaft 23 is rotatably supported in the intermediate housing 12. In addition, the intermediate housing 12 accommodates a compression unit 18 for compressing the refrigerant and an electric motor 19 for driving the compression unit 18, and the electric motor 19 is driven in the accommodation space 17. A motor drive circuit 30 for controlling the above is accommodated. Therefore, the compression unit 18, the electric motor 19, and the motor drive circuit 30 are accommodated in the housing 11 so as to be arranged in this order along the axial direction of the rotary shaft 23.

First, the compression unit 18 will be described.
The compression unit 18 includes a fixed scroll 20 fixed in the intermediate housing 12 and a movable scroll 21 disposed to face the fixed scroll 20. A compression chamber 22 whose volume can be changed is defined between the fixed scroll 20 and the movable scroll 21. The fixed scroll 20 is formed with a discharge passage 28 that allows the compression chamber 22 and the discharge chamber 15 to communicate with each other, and a discharge valve 29 is provided on an end surface of the fixed scroll 20.

Next, the electric motor 19 will be described.
The electric motor 19 includes a rotor 24 (rotor) that rotates integrally with the rotating shaft 23, and a stator 25 (stator) that is fixed to the inner peripheral surface of the intermediate housing 12 so as to surround the rotor 24. The rotor 24 includes a rotor core 24a fixed to the rotary shaft 23 so as to be rotatable integrally with the rotary shaft 23, and a plurality of permanent magnets 24b provided on the peripheral surface of the rotor core 24a. The stator 25 is formed by winding a coil 25b around a tooth (not shown) of a stator core 25a that has a substantially annular shape and is fixed to the inner peripheral surface of the intermediate housing 12.

Next, the motor drive circuit 30 will be described.
The motor drive circuit 30 includes a flat board 31 fixed to the inner surface of the inverter housing 14 and a plurality of types of electrical components 32 a to 32 d mounted on the board 31 in the accommodation space 17. The substrate 31 is arranged in the inverter housing 14 so as to extend along the radial direction of the rotating shaft 23. The motor drive circuit 30 supplies power to the stator 25 of the electric motor 19 based on a command from an air conditioner ECU (not shown). The substrate 31 is provided with a conductive member 33 that extends toward the connector connecting portion 42 that projects from the outer peripheral surface of the inverter housing 14.

  As shown in FIG. 1B, the connector connecting portion 42 includes a rectangular tube-shaped first extending portion 42 a that protrudes outward from the outer peripheral surface of the inverter housing 14 so as to extend in the radial direction of the rotating shaft 23, The second extending portion 42b is formed in a rectangular tube shape that is continuous with the first extending portion 42a and extends toward the electric motor 19 along the axial direction of the rotary shaft 23. A connecting portion 421a connected to a connecting hole 141 formed in the inverter housing 14 is formed in the first extending portion 42a. The connector connection portion 42 is connected to the inverter housing 14 by the connection between the connection hole 141 and the connection portion 421a.

  A connector housing 44 made of synthetic resin is attached to the opening 421b of the second extending portion 42b. The connector housing 44 has a quadrangular cylindrical shape, a fitting portion 44a fitted into the opening 421b, and a contact portion 44b that is connected to the fitting portion 44a and contacts the opening end 422b of the second extending portion 42b. The connecting portion forming portion 44c is connected to the contact portion 44b and connected to the external power source 40.

  As shown in FIG. 2, the second extending portion 42b is formed by a bottom wall 43 and an upper side wall 43a, a lower side wall 43b, a left side wall 43c, and a right side wall 43d extending in the extending direction of the second extending portion 42b. Has been. The upper side wall 43a and the lower side wall 43b are opposed to each other and extend in parallel with each other in the extending direction of the second extending portion 42b. The left side wall 43c and the right side wall 43d are arranged opposite to each other and extend in parallel with each other in the extending direction of the second extending portion 42b. The upper side wall 43a, the left side wall 43c, and the right side wall 43d are connected to the bottom wall 43. Between the lower side wall 43b and the bottom wall 43, a passage portion 431b is formed which is continuous with the first extending portion 42a and through which the conductive member 33 can pass. A cluster block 45 as an insulating member is disposed in the second extending portion 42b.

  As shown in FIGS. 3A and 3B, the cluster block 45 is formed in a square box shape having an opening on one surface. The outer surface of the cluster block 45 is formed by a square plate-like bottom wall 46, and an upper side wall 46a, a lower side wall 46b, a left side wall 46c, and a right side wall 46d which are erected from the periphery of the bottom wall 46 and form a square plate shape. Has been. The upper side wall 46a and the lower side wall 46b are opposed to each other and extend in parallel to each other. The left side wall 46c and the right side wall 46d face each other and extend in parallel to each other.

  In a state where the cluster block 45 is disposed in the second extending portion 42b, the bottom wall 46, the upper side wall 46a, the lower side wall 46b, the left side wall 46c, and the right side wall 46d of the cluster block 45 are connected to the second extending portion 42b. Are opposed to the bottom wall 43, the upper side wall 43a, the lower side wall 43b, the left side wall 43c and the right side wall 43d, respectively.

  Inside the cluster block 45, a partition wall 46e extending in parallel with the left side wall 43c and the right side wall 43d and connecting the upper side wall 43a and the lower side wall 43b is formed. The partition wall 46e partitions the interior of the cluster block 45 into two housing spaces 45a and 45b. In each of the accommodating spaces 45a and 45b, wiring connection portions 50 for supplying electric power from the external power supply 40 to the motor drive circuit 30 are disposed. The cluster block 45 ensures insulation between each wiring connection portion 50 and the connector connection portion 42.

  As shown in FIG. 3A, a first groove 47 a that extends linearly from the open end of the cluster block 45 to the bottom wall 46 is formed on the outer surface of the upper wall 46 a of the cluster block 45. Further, as shown in FIG. 3B, on the outer surface of the bottom wall 46 of the cluster block 45, there is a second groove 47b that continues to the first groove 47a and extends linearly from the upper side wall 46a to the lower side wall 46b. Is formed. Further, on the outer surface of the lower side wall 46b of the cluster block 45, there is formed a third groove 47c that continues to the second groove 47b and extends linearly from the bottom wall 46 to the opening end. The first to third groove portions 47a, 47b, 47c are formed to be recessed so as to be curved in an arc shape from the outer surface of the cluster block 45 to the inside.

  As shown in FIG. 1B, the inner surface of the upper side wall 43a of the second extending portion 42b extends from the portion closer to the opening 421b of the second extending portion 42b than the opening end of the cluster block 45 to the bottom wall 43. A fourth groove portion 48a extending linearly is formed. Further, on the inner surface of the bottom wall 43 of the second extending portion 42b, a fifth groove portion 48b is formed which is continuous with the fourth groove portion 48a and extends from the upper side wall 43a to the passage portion 431b. The fifth groove portion 48b communicates with the passage portion 431b. Furthermore, on the inner surface of the lower side wall 43b of the second extending portion 42b, a sixth groove portion 48c extending from the portion closer to the opening 421b of the second extending portion 42b than the opening end of the cluster block 45 to the passage portion 431b. Is formed. The sixth groove portion 48c communicates with the passage portion 431b. The fourth to sixth groove portions 48a, 48b, 48c are formed to be recessed so as to be curved in an arc shape from the inner surface of the second extending portion 42b toward the outside.

  The first groove portion 47a faces the fourth groove portion 48a, and a first routing space 49a is formed by the first groove portion 47a and the fourth groove portion 48a. The second groove 47b faces the fifth groove 48b, and a second routing space 49b is formed by the second groove 47b and the fifth groove 48b. The third groove portion 47c faces the sixth groove portion 48c, and a third routing space 49c is formed by the third groove portion 47c and the sixth groove portion 48c.

  An interlock wire 60 as an electrical wiring is routed between the connector connecting portion 42 and the cluster block 45. The interlock wire 60 is used for another purpose other than the power supply from the external power supply 40 to the motor drive circuit 30. Specifically, the interlock wire 60 is for detecting the connection state between the external power supply 40 and the wiring connection portion 50.

  One end of the interlock wire 60 is connected to a first energization unit (not shown) provided in the external power supply 40. The interlock wire 60 passes through the connector housing 44, the first routing space 49a, the second routing space 49b, the third groove portion 47c and the passage portion 431b, and the third routing space 49c and the connector housing 44. The other end is connected to a second energization unit (not shown) provided in the external power supply 40.

  Therefore, in the present embodiment, the first to third routing spaces 49a, 49b, and 49c constitute the routing space 49 formed between the connector connecting portion 42 and the cluster block 45. The first to third groove portions 47a, 47b and 47c constitute a groove 47 as a recess formed on the outer surface of the cluster block 45, and the fourth to sixth groove portions 48a, 48b and 48c constitute a connector connecting portion. A groove 48 is formed as a recess formed on the inner surface of 42.

  Then, one end of the wiring connection portion 50 and the conductive member 33 are electrically connected, and the other end of the wiring connection portion 50 and the external power supply 40 are electrically connected, whereby the external power supply 40 and the motor drive are driven. The circuit 30 is electrically connected via the wiring connection part 50 and the conductive member 33.

  In the electric compressor 10 having the above configuration, electric power from the external power supply 40 is supplied to the motor drive circuit 30 via the wiring connection portion 50 and the conductive member 33, and electric power is supplied from the motor drive circuit 30 to the electric motor 19. Then, the rotor 24 rotates, and the rotating shaft 23 rotates as the rotor 24 rotates. When the rotating shaft 23 rotates, the volume of the compression chamber 22 between the movable scroll 21 and the fixed scroll 20 decreases in the compression unit 18. Then, the refrigerant is sucked into the intermediate housing 12 from the external refrigerant circuit via the suction port, and the refrigerant sucked into the intermediate housing 12 is compressed through the suction passage 27 provided in the intermediate housing 12. It is sucked in and compressed in the compression chamber 22. The refrigerant compressed in the compression chamber 22 is discharged through the discharge passage 28 into the discharge chamber 15 by pushing away the discharge valve 29. Then, the refrigerant discharged into the discharge chamber 15 flows out to the external refrigerant circuit via the discharge port 16 and is recirculated into the intermediate housing 12.

Next, the operation of this embodiment will be described.
According to the electric compressor 10 configured as described above, the interlock wire 60 is routed in the routing space 49 formed by combining the grooves 47 and 48. Therefore, when the cluster block 45 is accommodated in the connector connection portion 42, the interlock wire 60 is suppressed from being bitten between the connector connection portion 42 and the cluster block 45. As a result, the interlock wire 60 is not caught between the connector connecting portion 42 and the cluster block 45, and the interlock wire 60 is not disconnected, and the external power supply 40 and the wiring connecting portion 50 are connected. In spite of being connected, the external power supply 40 and the wiring connection unit 50 are not erroneously detected as disconnected. Therefore, it is suppressed that a malfunction arises in the performance of the hybrid vehicle by which the electric compressor 10 of this embodiment is mounted.

In the above embodiment, the following effects can be obtained.
(1) A groove 48 was formed on the inner surface of the connector connecting portion 42, and a groove 47 was formed on the outer surface of the cluster block 45. Then, a routing space 49 in which the interlock wire 60 is routed is formed between the connector connecting portion 42 and the cluster block 45 by the grooves 47 and 48, and the interlock wire 60 is routed in the routing space 49. . Therefore, the grooves 47 and 48 are not formed on the outer surface of the cluster block 45 and the inner surface of the connector connection portion 42, and the interlock wire 60 is routed in a slight gap between the connector connection portion 42 and the cluster block 45. In comparison with the case where the interlock wire 60 is caught between the connector connecting portion 42 and the cluster block 45, the biting of the interlock wire 60 can be suppressed.

  (2) The groove 48 was formed in the connector connecting portion 42, the groove 47 was formed in the cluster block 45, and the routing space 49 was formed by combining the grooves 47 and 48. Therefore, for example, when the groove 48 is formed only in the connector connecting portion 42 and the routing space 49 is made larger than the routing space formed by the groove 48, the connector connecting portion 42 and the cluster block 45 can be enlarged. The interlock wire 60 can be further prevented from being caught between the two.

  (3) The routing space 49 is formed using the groove 48 formed in the connector connecting portion 42 and the groove 47 formed in the cluster block 45. Therefore, the routing space 49 can be easily formed between the connector connecting portion 42 and the cluster block 45.

In addition, you may change the said embodiment as follows.
In the embodiment, as shown in FIG. 4, in the state where the interlock wire 60 is routed in the groove 47 of the cluster block 45, the tape 70 as a fixing member is wound around the entire outer surface of the cluster block 45, The interlock wire 60 may be fixed to the cluster block 45. According to this, for example, it is possible to prevent the interlock wire 60 from moving due to vibration during traveling of the hybrid vehicle on which the electric compressor 10 is mounted. In the state where the interlock wire 60 is routed in the groove 48 of the connector connecting portion 42, the interlock wire 60 is connected to the connector connecting portion by winding a tape 70 as a fixing member around the entire inner surface of the connector connecting portion 42. 42 may be fixed.

  As shown in FIGS. 5A and 5B, a groove 80 as a recess may be formed only on the outer surface of the upper side wall 46a of the cluster block 45. The groove 80 extends linearly from the opening end of the cluster block 45 toward the bottom wall 46, and extends while curving in an arc shape so as to return from the middle of the upper side wall 46a to the opening end side of the cluster block 45. It is formed so as to extend linearly toward the opening end. Further, a groove 81 as a recess having the same shape as the groove 80 is formed in a portion of the connector connecting portion 42 facing the groove 80. A routing space 90 is formed by the grooves 80 and 81. In addition, although the groove | channel 80 was formed only in the outer surface of the upper side wall 46a of the cluster block 45, you may form not only this but the groove | channel as a recessed part only in the outer surface of the lower side wall 46b of the cluster block 45. And the groove | channel as a recessed part may be formed in the site | part of the connector connection part 42 facing the said groove | channel, and a routing space may be formed by each groove | channel.

In the embodiment, the groove 48 may be formed only in the connector connecting portion 42, or the groove 47 may be formed only in the cluster block 45.
In the embodiment, the first to third groove portions 47a, 47b, 47c are formed to be recessed so as to be curved in an arc toward the inner side of the cluster block 45. The shapes of the three groove portions 47a, 47b, 47c are not particularly limited.

  In the embodiment, the fourth to sixth groove portions 48a, 48b, and 48c are formed so as to be curved in an arc shape toward the outside of the second extending portion 42b. The shapes of the fourth to sixth groove portions 48a, 48b, and 48c are not particularly limited.

  In the embodiment, the electrical wiring is not limited to the interlock wire 60, and may be a communication harness that electrically connects the air conditioner ECU and the motor drive circuit 30, for example. In this case, the communication harness is routed from the external power supply 40 side so as to pass through the routing space formed between the connector connection portion 42 and the cluster block 45 and extend to the motor drive circuit 30 side.

  In embodiment, although the connector connection part 42 was a square cylinder shape, it is not restricted to this, For example, a cylindrical shape may be sufficient. In this case, the cluster block 45 is also preferably formed in a cylindrical shape.

In the embodiment, the connector connecting portion 42 may be integrally formed simultaneously with the formation of the inverter housing 14.
In the embodiment, the second extending portion 42b of the connector connecting portion 42 is provided so as to extend along the axial direction of the rotating shaft 23. However, the present invention is not limited to this. For example, the second extending portion 42b of the connector connecting portion 42 is provided. The extending portion 42 b may be provided so as to extend along the radial direction of the rotating shaft 23. That is, the extending direction of the connector connecting portion may be changed as appropriate in accordance with the mounting space, arrangement position, etc. of the vehicle on which the electric compressor is mounted.

In the embodiment, the entire wiring connection portion 50 may be accommodated by the cluster block 45 to ensure insulation between the wiring connection portion 50 and the connector connection portion 42.
In the embodiment, the two wiring connection portions 50 are arranged in parallel. However, the present invention is not limited to this, and for example, three wiring connection portions 50 may be arranged in parallel. That is, the number of the wiring connection portions 50 arranged in parallel is not particularly limited.

  In the embodiment, the compression unit 18, the electric motor 19, and the motor drive circuit 30 are accommodated in the housing 11 so as to be arranged in this order along the axial direction of the rotary shaft 23. For example, the electric motor 19, the compression unit 18, and the motor drive circuit 30 may be housed in the housing 11 so as to be arranged in the order of the axial direction of the rotary shaft 23.

  In embodiment, the compression part 18 is not restricted to the type comprised by the fixed scroll 20 and the movable scroll 21, For example, you may change into a piston type, a vane type, etc.

The present invention may be applied not only to vehicle air conditioners but also to other air conditioners.
The present invention is embodied in the electric compressor 10 that is mounted on a hybrid vehicle and used in a vehicle air conditioner. However, the present invention is not limited to this, and is not limited to a hybrid vehicle. And may be embodied in an electric compressor used in a vehicle air conditioner.

Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(A) The connector connecting portion is provided so as to extend toward the electric motor along an axial direction of a rotating shaft housed in the housing. An electric compressor according to claim 1.

  (B) The technical idea, wherein the compression unit, the electric motor, and the motor drive circuit are accommodated in the housing so as to be arranged in this order along the axial direction of the rotating shaft. The electric compressor described in (a).

  DESCRIPTION OF SYMBOLS 10 ... Electric compressor, 11 ... Housing, 18 ... Compression part, 19 ... Electric motor, 23 ... Rotating shaft, 30 ... Motor drive circuit, 40 ... External power supply, 42 ... Connector connection part, 45 ... Cluster block as insulation member , 47, 48, 80, 81... Groove as a concave portion, 49, 90... Routing space, 50... Wiring connection portion, 60.

Claims (3)

The housing contains a compression section, an electric motor, and a motor drive circuit, and a connector connection portion is provided on the outer surface of the housing, and electric power from an external power source is supplied to the motor drive circuit in the connector connection portion. A wiring connecting portion for supplying to the connector, and an insulating member for securing insulation between the wiring connecting portion and the connector connecting portion is provided inside the connector connecting portion. An electric compressor in which electrical wiring used for another purpose other than power supply from the external power source to the motor drive circuit is arranged between the inner surface of the connecting portion and the outer surface of the insulating member. ,
The insulating member includes a square box-shaped outer shell having an opening on one surface, and a partition wall partitioning the inside thereof.
A first recess is formed on an outer surface of the outer member of the insulating member where the partition wall is connected, and the electric wiring is routed between the connector connecting portion and the insulating member by the first recess. An electric compressor characterized in that a routed space is formed. The second concavity is formed on the inner surface of the connector connecting portion , and the routing space is formed by combining the first concavity and the second concavity . Electric compressor.   The electric compressor according to claim 1, further comprising a fixing member that fixes the electric wiring.