JP2019178667A - Motor compressor - Google Patents

Abstract

To provide a motor compressor capable of suppressing the generation of a pressure difference between the inside and the outside of a cluster block.SOLUTION: The motor compressor includes an insulation-quality cluster block 60 in which a connection terminal 50 is stored, and a housing forming a motor storage chamber to store an electric motor and the cluster block 60, the cluster block 60 having a terminal storage chamber S5 storing the connection terminal 50, and a motor wiring insertion hole through which a motor wiring 27 is inserted, the terminal storage chamber S5 being communicated via the motor wiring insertion hole with the motor storage chamber, the cluster block 60 having a phase wire storage chamber 67 storing a phase wire connection part 29a, and an internal communication path 81 communicating the phase wire storage chamber 67 and the terminal storage chamber S5, the phase wire storage chamber 67 and the motor storage chamber being communicated only via the internal communication path 81, the terminal storage chamber S5 and the motor wiring insertion hole.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electric compressor.

  An electric compressor disclosed in Patent Document 1 includes a compression unit that compresses a refrigerant, an electric motor that drives the compression unit and includes a plurality of coils, a motor drive circuit that drives the electric motor, a motor drive circuit, and an electric drive unit. Electrically connected conductive members, motor wiring drawn from each phase of the plurality of phase coils, and phase wire connecting portions in which the phase lines drawn from each phase of the plurality of phase coils are electrically connected to each other Is provided. Moreover, the electric compressor disclosed in Patent Document 1 houses a connection terminal that electrically connects the motor wiring and the conductive member, an insulating cluster block that houses the connection terminal therein, and an electric motor and a cluster block. And a housing forming a motor housing chamber. The cluster block has a terminal accommodating chamber in which connection terminals are accommodated and a phase wire accommodating chamber in which a bundle of phase wires is accommodated. The phase wire accommodation chamber is sealed with a rubber plug and is isolated from the motor accommodation chamber.

JP 2013-072338 A

  In such an electric compressor, the pressure in the phase line accommodation chamber sealed by the rubber plug is substantially constant, whereas the pressure in the motor accommodation chamber varies. For this reason, a pressure difference arises between the phase line accommodation chamber and the motor accommodation chamber, and the cluster block may be damaged.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide an electric compressor capable of suppressing the occurrence of a pressure difference inside and outside a cluster block.

  An electric compressor for solving the above problems includes a compressor that compresses a refrigerant, an electric motor that drives the compressor and includes a plurality of coils, a motor drive circuit that drives the electric motor, A conductive member electrically connected to the motor drive circuit, a motor wiring drawn from each phase of the plurality of phase coils, and a phase line drawn from each phase of the plurality of phase coils are electrically connected to each other. A phase wire connection portion, a connection terminal for electrically connecting the motor wiring and the conductive member, an insulating cluster block for accommodating the connection terminal therein, the electric motor and the cluster block A housing that forms a motor housing chamber for housing the cluster block, a terminal housing chamber for housing the connection terminal, and a motor wiring insertion through which the motor wiring is inserted. And the terminal accommodating chamber is an electric compressor communicating with the motor accommodating chamber via the motor wiring insertion hole, and the cluster block is a phase wire that accommodates the phase line connecting portion. A storage chamber, and an internal communication passage that communicates the phase wire storage chamber and the terminal storage chamber. The phase wire storage chamber and the motor storage chamber include the internal communication passage, the terminal storage chamber, and the terminal storage chamber. The gist is that they communicate with each other only through the motor wiring insertion hole.

  According to this, the pressure in the phase line accommodation chamber is equalized with the pressure in the motor accommodation chamber via the internal communication path, the terminal accommodation chamber, and the motor wiring insertion hole. Therefore, it can suppress that a pressure difference arises inside and outside a cluster block. As a result, the cluster block can be prevented from being damaged due to the pressure difference between the inside and outside of the cluster block.

  In the electric compressor, the cluster block includes a case member having a terminal accommodating hole for accommodating the connection terminal, and the terminal accommodating while being fitted to the opening so as to close the opening of the terminal accommodating hole. It is preferable that the motor wiring insertion hole is formed between an inner peripheral surface of the terminal accommodating hole and an outer peripheral surface of the lid member.

  When the refrigerant containing the lubricating oil enters the terminal accommodating chamber, the lubricating oil becomes a conductor for connecting the connecting terminal and the housing, and there is a possibility that insulation between the connecting terminal and the housing cannot be secured. In contrast, since the opening of the terminal accommodation hole is closed by the lid member, it is difficult for the refrigerant containing the lubricating oil to enter the terminal accommodation chamber. Therefore, insulation between the connection terminal and the housing is ensured.

  The motor wiring insertion hole is formed by assembling the case member and the lid member. For this reason, for example, compared with the case where the through-hole which penetrates a cover member is used as a motor wiring insertion hole, while being able to form a motor wiring insertion hole easily, it is easy to insert a motor wiring with respect to a motor wiring insertion hole.

  The electric compressor includes an insulating tube member that covers the motor wiring and is fitted into the motor wiring insertion hole, and the terminal accommodating chamber has a gap between the inner side of the tube member and the motor wiring. It is preferable that the motor housing chamber communicates with the motor.

  If refrigerant containing lubricating oil enters the terminal housing chamber through the motor wiring insertion hole, the lubricating oil becomes a conductor that connects the connecting terminal and the housing, and there is a possibility that insulation between the connecting terminal and the housing cannot be secured. is there. In general, it is known that the resistance of a conductor is proportional to the length of the conductor. That is, the longer the conductor length, the smaller the conductor resistance. For this reason, the insulation between a connection terminal and a housing can be improved, so that the distance (insulation distance of a connection terminal and a housing) which a connection terminal and a housing conduct | electrically connect via lubricating oil is lengthened.

  In the configuration in which the tube member is not provided, the refrigerant flowing in the motor housing chamber enters the terminal housing chamber through a gap between the motor wiring insertion hole and the motor wiring. On the other hand, in the configuration in which the tube member is provided, the refrigerant flowing in the motor housing chamber enters the terminal housing chamber through a gap between the inside of the tube member and the motor wiring. By providing the tube member, the insulation distance between the connection terminal and the housing becomes longer than when the tube member is not provided. Therefore, the insulation between the connection terminal and the housing can be improved.

  According to the present invention, it is possible to suppress a pressure difference from occurring inside and outside the cluster block.

The sectional side view of the electric compressor of an embodiment. The exploded perspective view of a connector. Sectional drawing of a connector. The front view of a cover member. The front view of a cover member and a lid member. The perspective view of a connector.

Hereinafter, an embodiment embodying an electric compressor will be described with reference to FIGS.
As shown in FIG. 1, the housing 11 of the electric compressor 10 is connected to a motor housing 12 having a bottomed cylindrical shape with an opening 12 a formed at one end (left end in FIG. 1), and one end of the motor housing 12. A discharge housing 13 having a bottomed cylindrical shape. A bottomed cylindrical inverter cover 14 is attached to the bottom wall 121 of the motor housing 12. A discharge chamber S <b> 1 is defined between the motor housing 12 and the discharge housing 13. A discharge port 15 is formed on the bottom wall of the discharge housing 13, and an external refrigerant circuit (not shown) is connected to the discharge port 15. A suction port (not shown) is formed in the peripheral wall 122 of the motor housing 12, and an external refrigerant circuit is connected to the suction port.

  In the motor housing 12, a rotating shaft 16, a compression unit 17 that compresses the refrigerant, and an electric motor 18 that drives the compression unit 17 are accommodated. Therefore, the motor housing 12 forms a motor housing chamber S3 that houses the electric motor 18. The electric motor 18 drives the rotary shaft 16. The compression unit 17 is driven by the rotation of the rotating shaft 16. The electric motor 18 is disposed closer to the bottom wall 121 (right side in FIG. 1) of the motor housing 12 than the compression portion 17.

  A shaft support member 19 is provided between the compression portion 17 and the electric motor 18 in the motor housing chamber S3. An insertion hole 19 a through which one end of the rotating shaft 16 is inserted is formed at the center of the shaft support member 19. A radial bearing 16 a is provided between the insertion hole 19 a and one end of the rotating shaft 16. One end of the rotating shaft 16 is rotatably supported by the shaft support member 19 via a radial bearing 16a.

  A bearing 121 a is recessed in the bottom wall 121 of the motor housing 12. The other end of the rotating shaft 16 is inserted inside the bearing 121a. A radial bearing 16 b is provided between the bearing portion 121 a and the other end portion of the rotating shaft 16. The other end portion of the rotating shaft 16 is rotatably supported by the bearing portion 121a via a radial bearing 16b.

  Further, the accommodation space S <b> 2 is partitioned by the bottom wall 121 of the motor housing 12 and the inverter cover 14. In the accommodation space S2, a motor drive circuit 20 (indicated by a two-dot chain line in FIG. 1) is attached to the outer surface of the bottom wall 121 on the inverter cover 14 side. Therefore, in this embodiment, the compression part 17, the electric motor 18, and the motor drive circuit 20 are arrange | positioned along with the direction (axial direction) where the axis line L of the rotating shaft 16 extends in this order.

  The compression unit 17 includes a fixed scroll 17a fixed in the motor housing chamber S3 and a movable scroll 17b disposed to face the fixed scroll 17a. A compression chamber S4 whose volume can be changed is defined between the fixed scroll 17a and the movable scroll 17b. The refrigerant compressed by changing the volume of the compression chamber S4 is discharged into the discharge chamber S1. The refrigerant flowing through the motor storage chamber S3, the compression chamber S4, and the discharge chamber S1 is lubricated at the sliding portion in the electric compressor 10 (in this embodiment, for example, lubrication between the fixed scroll 17 and the movable scroll 17b). Lubricating oil is included to make it good.

  The electric motor 18 includes a rotor 21 (rotor) that rotates integrally with the rotary shaft 16, and a stator 22 (stator) that is fixed to the inner peripheral surface of the motor housing 12 so as to surround the rotor 21. Yes.

  The rotor 21 has a rotor core 23 having a cylindrical shape, and the rotor core 23 is fixed to the rotary shaft 16. A plurality of permanent magnets 24 are embedded in the rotor core 23, and the permanent magnets 24 are provided at equal pitches in the circumferential direction of the rotor core 23. The stator 22 includes an annular stator core 25 fixed to the inner peripheral surface of the motor housing 12, and U-phase, V-phase, and W-phase coils 26 provided on the stator core 25.

  A first coil end 261 of each phase protrudes from one end surface 251 of the stator core 25. A second coil end 262 for each phase protrudes from the other end surface 252 of the stator core 25. The first coil end 261 is located on the compression portion 17 side (one axial end side of the rotary shaft 16), and the second coil end 262 is on the motor drive circuit 20 side (axial other end side of the rotary shaft 16). positioned.

  Two motor wires 27 and two phase wires 28 are drawn out from the first coil end 261 of each phase. The U-phase, V-phase, and W-phase coils 26 have a double-wire structure formed by winding two conductive wires in order to reduce the voltage. In FIG. 1, for example, only two U-phase motor wires 27 and two U-phase phase wires 28 are illustrated. Each motor wiring 27 and each phase wire 28 are drawn from the first coil end 261 in a state where the conductive wire of the coil 26 drawn from the first coil end 261 is covered with an insulating film.

  As shown in FIG. 2, the phase wires 28 corresponding to the U-phase, V-phase, and W-phase coils 26 are bundled as a phase wire bundle 29. At the tip of each phase wire 28, the conducting wire from which the insulation coating has been removed is exposed. The phase wire bundle 29 has a phase wire connection portion 29a (neutral point) in which the tip portions of the phase wires 28 are electrically connected to each other.

  As shown in FIG. 1, a through hole 121 b is formed in the bottom wall 121 of the motor housing 12. An airtight terminal 31 is disposed in the through hole 121b. The hermetic terminal 31 has three conductive members 32 (only one is shown in FIG. 1) corresponding to the U-phase, V-phase, and W-phase coils 26. Each conductive member 32 is a cylindrical metal terminal extending linearly. Each conductive member 32 is inserted into the through-hole 121b and one end thereof is electrically connected to the motor drive circuit 20 via the cable 20a. The other end of each conductive member 32 protrudes from the accommodation space S2 into the motor accommodation chamber S3 through the through hole 121b. Further, the airtight terminal 31 has three insulating members 33 (only one is shown in FIG. 1) that fixes each conductive member 32 while being insulated from the bottom wall 121.

  A connector 40 is accommodated in the motor accommodating chamber S3. The connector 40 connects the motor wiring 27 and the conductive member 32. The connector 40 is disposed on the outer peripheral side of the stator core 25 and the second coil end 262 in the radial direction of the rotating shaft 16.

  As shown in FIG. 2, the connector 40 includes three connection terminals 50 corresponding to the U-phase, V-phase, and W-phase coils 26, and an insulating cluster block 60 that accommodates the three connection terminals 50. ing.

  Each connection terminal 50 has a first connection portion 51 electrically connected to the motor wiring 27 on one end side in the longitudinal direction, and a second connection portion 52 electrically connected to the conductive member 32 in the longitudinal direction. On the other end side. The first connection portion 51 extends linearly. The front end of the motor wiring 27 is connected to the first connection portion 51. In the two motor wirings 27 of each phase, a portion on the first connection portion 51 side is inserted into the cylindrical insulating tube member 30 and covered with the tube member 30. In addition, at the tip portion of each motor wiring 27, a conductive wire that is not covered by the tube member 30 and from which the insulating coating is removed is exposed. The inner diameter of the tube member 30 is larger than the diameter of the two motor wires 27. Therefore, a gap is formed between the motor wiring 27 and the inner peripheral surface 30 a of the tube member 30.

Each connection terminal 50 has a caulking portion 53 that caulks the end portion of the tube member 30 on the first connection portion 51 side and the two motor wires 27. The caulking portion 53 extends from the one end portion of the first connecting portion 51 on the tube member 30 side so as to surround the tube member 30. The motor wiring 27 is mechanically connected to each connection terminal 50 by being caulked by the caulking portion 53 while being inserted into the tube member 30. The second connection portion 52 has a substantially long rectangular tube shape continuous with the other end portion of the first connection portion 51. The other end of the conductive member 32 is inserted inside the square tube of the second connection portion 52. The axial center direction of the square tube of the second connection portion 52 coincides with the longitudinal direction of the first connection portion 51. Therefore, the insertion direction of the conductive member 32 with respect to the second connection portion 52 of the connection terminal 50 coincides with the longitudinal direction of the first connection portion 51.

As shown in FIGS. 2 and 3, the cluster block 60 includes a case member 61 and a lid member 71 assembled to the case member 61.
As shown in FIG. 2, the case member 61 has a flat square box shape formed by a bottom wall 62 and a side wall 63 erected from an edge of the bottom wall 62. The case member 61 has a terminal accommodating hole 64. As shown in FIG. 3, each of the terminal receiving holes 64 includes a part of each connection terminal 50, a part of the tube member 30 on the first connection part 51 side, and one of the two motor wires 27 on the first connection part 51 side. Is housed. The terminal accommodating hole 64 has three insertion holes 64a and an opening 64b that is continuous with the three insertion holes 64a. The opening 64b opens on the side of the side wall 63 opposite to the bottom wall 62 side. Each insertion hole 64 a is partitioned from other insertion holes 64 a by a partition wall 65 formed in the case member 61. Each insertion hole 64 a has an elongated hole shape whose axial center extends along the standing direction of the side wall 63 from the bottom wall 62. The axial center direction of each insertion hole 64 a coincides with the longitudinal direction of the first connection portion 51 of the connection terminal 50.

  As shown in FIG. 4, the three insertion holes 64a are arranged side by side. Therefore, the second connection portions 52 of the connection terminals 50 accommodated in the terminal accommodation holes 64 are also arranged. In the front view of the case member 61, each insertion hole 64a has a substantially rectangular shape. The longitudinal direction of each insertion hole 64a coincides with the longitudinal direction of the square tube of each second connection portion 52, and the short direction of each insertion hole 64a coincides with the short direction of the square tube of each second connection portion 52. Yes. Further, the longitudinal direction of each insertion hole 64 a is inclined with respect to the long side of the case member 61.

  The bottom wall 62 of the case member 61 is formed with a circular through hole 62a communicating with each insertion hole 64a. Each through-hole 62a is located inside the square tube of each second connection portion 52 when viewed from the axial center direction of each through-hole 62a. As shown in FIGS. 2 and 3, three cylindrical guide portions 62 b protrude from the outer surface of the bottom wall 62 of the case member 61. The inside of each guide portion 62b communicates with each through hole 62a. The axial center of each guide part 62b and the axial center of each through-hole 62a are in agreement. The other end of each conductive member 32 is inserted into the inside of each guide portion 62b and the inside of the square tube of the second connection portion 52 of each connection terminal 50 through each through hole 62a. Thereby, each conductive member 32 and each connection terminal 50 are electrically connected. Therefore, the inside of each guide portion 62b and each through hole 62a constitute a conductive member insertion hole 66 through which each conductive member 32 is inserted. Therefore, the case member 61 has a conductive member insertion hole 66.

  As shown in FIGS. 3 and 4, the case member 61 has a bottomed cylindrical phase wire accommodation chamber 67 inside. The phase wire accommodating chamber 67 accommodates the phase wire connecting portion 29 a of the phase wire bundle 29. The phase line accommodating chamber 67 has an elongated hole shape whose axial center extends along the standing direction of the side wall 63 from the bottom wall 62. The axial direction of the phase wire housing chamber 67 coincides with the axial direction of the insertion hole 64a. The phase line accommodating chamber 67 is partitioned from the insertion holes 64 a by the partition wall 65. The phase line storage chamber 67 is provided with a longitudinal wall of the insertion hole 64a located at the center of the three insertion holes 64a arranged side by side, and a short side of the insertion hole 64a located on one end side, and the partition wall 65. Next to each other. The phase wire accommodation chamber 67 is continuous with the opening 64 b of the terminal accommodation hole 64.

  The partition wall 65 has a groove 68 in an end surface 65a where each insertion hole 64a and the phase line accommodation chamber 67 are opened. One end of the groove 68 communicates with the terminal accommodation hole 64 located at the center of the three terminal accommodation holes 64, and the other end of the groove 68 communicates with the phase wire accommodation chamber 67.

  Each connection terminal 50 is accommodated in each insertion hole 64a through an opening 64b so that the second connection portion 52 is located closer to the conductive member insertion hole 66 than the first connection portion 51 is. The phase wire bundle 29 is housed in the phase wire housing chamber 67 through the opening 64b so that the phase wire connecting portion 29a is positioned on the conductive member insertion hole 66 side.

  The outer surface of one side wall 63 among the four side walls of the case member 61 is a curved surface 63 b that curves in a concave shape toward the inside of the case member 61. The curved surface 63 b is a surface extending along the outer peripheral surface of the stator core 25. The connector 40 of the present embodiment is arranged in the motor housing chamber S3 so that the curved surface 63b is along the outer peripheral surface of the stator core 25.

  The lid member 71 has a plate-like lid portion 72. The outer peripheral surface 72a of the lid part 72 extends along the inner peripheral surface 63a of the side wall 63 that forms the opening 64b. As shown in FIG. 3, the lid member 71 forms the terminal accommodating chamber S <b> 5 while closing the terminal accommodating hole 64 by fitting the lid 72 to the opening 64 b of the case member 61. The outer peripheral surface 72a of the lid part 72 is opposed to the inner peripheral surface 63a of the side wall 63 that forms the opening 64b. Further, the first end surface 72 b facing the terminal accommodating hole 64 in the lid portion 72 faces the end surface 65 a on the opening 64 b side in the partition wall 65. The thickness of the lid portion 72 is shorter than the distance between the end surface 65 a on the side of the opening 64 b in the partition wall 65 and the end surface 63 c on the side of the opening 64 b in the side wall 63. Therefore, the second end surface 72 c facing the outside of the cluster block 60 in the lid portion 72 is located closer to the insertion hole 64 a than the end surface 63 c of the side wall 63. The lid 72 has three motor wiring insertion grooves 73 that are recessed in the outer peripheral surface 72 a of the lid 72 and a phase wire bundle insertion recess 74.

  As shown in FIGS. 3 and 5, in the cluster block 60, the groove 68 provided in the partition wall 65 is closed by the first end surface 72 b of the lid portion 72. An internal communication path 81 is configured by the groove 68 and the first end surface 72 b of the lid portion 72. The insertion hole 64 a of the terminal accommodation hole 64 and the phase wire accommodation chamber 67 communicate with each other through the internal communication path 81 inside the cluster block 60.

  Further, the inner peripheral surface 63a of the side wall 63 that forms each motor wiring insertion groove 73 and the opening 64b of the terminal accommodating hole 64 is inserted into the motor wiring through which the tube member 30 into which the two motor wirings 27 are inserted is inserted. A hole 82 is formed. The motor wiring insertion hole 82 is continuous with each insertion hole 64 a of the terminal accommodation hole 64. The tube member 30 passes through the motor wiring insertion hole 82. The end of the tube member 30 on the first connection portion 51 side is located in the terminal accommodating chamber S5, and the opposite end is located in the motor accommodating chamber S3.

  As shown in FIG. 3, the terminal accommodating chamber S <b> 5 communicates with the motor accommodating chamber S <b> 3 shown in FIG. 1 via the motor wiring insertion hole 82. In the present embodiment, the terminal accommodating chamber S5 communicates with the motor accommodating chamber S3 through a gap provided between the inner peripheral surface 30a of the tube member 30 and the two motor wires 27. Therefore, the gap provided between the inner peripheral surface 30 a of the tube member 30 and the two motor wires 27 constitutes an external communication path 83 that communicates the inside and outside of the cluster block 60. As shown in FIG. 5, the inner peripheral surface 63 a of the side wall 63 that forms the phase wire bundle insertion recess 74 and the opening 64 b constitutes a phase wire bundle insertion portion 84 through which the phase wire bundle 29 is inserted.

  As shown in FIG. 2, the lid member 71 has a protruding portion 75 that protrudes from the second end surface 72 c of the lid portion 72. The outer peripheral surface 75 a of the protruding portion 75 is positioned slightly inside the outer peripheral surface 72 a of the lid portion 72. Therefore, a gap is formed between the inner peripheral surface 63 a of the side wall 63 that forms the opening 64 b of the case member 61 and the outer peripheral surface 75 a of the protruding portion 75 of the lid portion 72.

As shown in FIG. 6, a resin 90 is filled between the inner peripheral surface 63 a of the side wall 63 that forms the opening 64 b and the outer peripheral surface 75 a of the protruding portion 75. The resin 90 is, for example, an adhesive. The resin 90 seals between the inner peripheral surface 63a of the side wall 63 that forms the opening 64b and the outer peripheral surface 75a of the protrusion 75, and also the inner peripheral surface 63a of the side wall 63 that forms the opening 64b. And the outer peripheral surface 75 a of the protruding portion 75 are bonded via a resin 90. Further, the resin 90 also flows into the phase wire housing chamber 67 through the space between the phase wire bundle 29 and the inner peripheral surface of the phase wire bundle insertion portion 84. As a result, the phase wire bundle insertion portion 84 is sealed, and the phase wire bundle 29 and the cluster block 60 are bonded via the resin 90. Therefore, the phase wire accommodating chamber 67 communicates only via the internal communication path 81, the terminal accommodating chamber S5, and the motor wiring insertion hole 82.

  In the electric compressor 10 having the above configuration, when electric power is supplied from the motor drive circuit 20 to the electric motor 18 via the cables 20a, the conductive members 32, the connection terminals 50, and the motor wirings 27, the electric motor 18 is supplied. The compressor 17 is driven by the rotation of the rotary shaft 16 as the electric motor 18 is driven, and the refrigerant is compressed by the compressor 17.

The operation and effect of this embodiment will be described.
(1) The terminal housing chamber S5 and the phase wire housing chamber 67 communicate with each other through the internal communication path 81. For this reason, the pressure in the terminal housing chamber S5 and the pressure in the phase wire housing chamber 67 sealed by the resin 90 are made uniform. Further, the terminal housing chamber S5 and the motor housing chamber S3 communicate with each other through the external communication path 83. For this reason, the pressure in terminal storage chamber S5 and the pressure in motor storage chamber S3 are equalized. That is, the pressure in the phase line storage chamber 67 is equalized with the pressure in the motor storage chamber S3 via the internal communication path 81, the terminal storage chamber S5, and the external communication path 83. Therefore, it is possible to suppress a pressure difference from occurring inside and outside the cluster block 60. As a result, damage to the cluster block 60 caused by the pressure difference between the inside and outside of the cluster block 60 can be suppressed.

  (2) When the refrigerant containing the lubricating oil enters the terminal accommodating chamber S5, the lubricating oil can be a conductor that makes the motor housing 12 conductive to the connection terminal 50 and the tip of the motor wiring 27. Therefore, there is a possibility that insulation between the connection terminal 50 and the motor wiring 27 and the motor housing 12 cannot be secured. On the other hand, since the opening 64b of the terminal accommodation hole 64 is closed by the lid portion 72, it is difficult for the refrigerant containing the lubricant to enter the terminal accommodation chamber S5. Therefore, it is possible to ensure insulation between the connection terminal 50 and the tip of the motor wiring 27 and the motor housing 12.

  Further, the motor wiring insertion hole 82 is formed by assembling the case member 61 and the lid member 71. For this reason, for example, compared with the case where the through-hole which penetrates the cover part 72 is used as the motor wiring insertion hole 82, the motor wiring insertion hole 82 can be easily formed, and the tube member 30 with respect to the motor wiring insertion hole 82. Easy to insert.

  (3) The refrigerant containing the lubricating oil may enter the cluster block 60 through the external communication path 83. The lubricating oil can be a conductor that connects the connection terminal 50 and the tip of the motor wiring 27 to the motor housing 12. Therefore, there is a possibility that insulation between the connection terminal 50 and the tip of the motor wiring 27 and the motor housing 12 cannot be secured. In general, it is known that the resistance of a conductor is proportional to the length of the conductor. That is, the longer the conductor length, the smaller the conductor resistance. For this reason, the longer the distance (insulation distance between the connection terminal 50 and the motor housing 12) between the connection terminal 50 and the motor housing 12 through the lubricating oil is, the longer the insulation between the connection terminal 50 and the motor housing 12 is. Can be increased. The insulation distance between the connection terminal 50 and the motor housing 12 corresponds to the external communication path 83.

When the tube member 30 is omitted and the gap between the inner peripheral surface of the motor wiring insertion hole 82 and the motor wiring 27 is the external communication path 83, the distance that the lubricating oil passes through the external communication path 83 is determined by the lid portion 72. It matches the thickness of. On the other hand, in this embodiment, the gap between the inner peripheral surface 30 a of the tube member 30 and the motor wiring 27 is used as the external communication path 83. For this reason, the distance that the lubricating oil passes through the external communication path 83 coincides with the length of the tube member 30. The length of the tube member 30 is longer than the thickness of the lid portion 72. Therefore, the resistance of the refrigerant containing the lubricating oil that passes through the external communication path 83 is higher than when the gap between the inner peripheral surface of the motor wiring insertion hole 82 and the motor wiring 27 is the external communication path 83. As a result, the insulation between the connection terminal 50 and the distal end portions of the motor wiring 27 and the motor housing 12 can be enhanced.

  (4) For example, by forming a through hole in the side wall 63 of the case member 61, it is conceivable to connect the phase line housing chamber 67 and the motor housing chamber S3. In this case, the lubricating oil is provided via the through hole. The refrigerant containing the liquid enters the phase wire accommodation chamber 67. Then, the lubricating oil can be a conductor that connects the phase wire connecting portion 29 a of the phase wire bundle 29 and the motor housing 12. Therefore, there is a possibility that insulation between the phase wire connecting portion 29a of the phase wire bundle 29 and the motor housing 12 cannot be secured.

  In the present embodiment, the phase wire accommodation chamber 67 communicates with the motor accommodation chamber S3 via the internal communication passage 81, the terminal accommodation chamber S5, and the external communication passage 83. For this reason, the main path through which the refrigerant containing the lubricating oil can enter the cluster block 60 is only the external communication path 83. Therefore, the insulation between the phase wire connecting portion 29a of the phase wire bundle 29 and the motor housing 12 can be enhanced.

This embodiment can be implemented with the following modifications. The present embodiment and the following modifications can be implemented in combination with each other within a technically consistent range.
The conductive member insertion hole 66 may be provided on the side wall 63 of the case member 61. In this case, the axial direction of the square tube of the second connection portion 52 is orthogonal to the longitudinal direction of the first connection portion 51. That is, the insertion direction of the conductive member 32 with respect to the second connection portion 52 of the connection terminal 50 is orthogonal to the longitudinal direction of the first connection portion 51.

  The arrangement mode of the insertion holes 64a and the phase wire accommodation chamber 67 in the case member 61 of the cluster block 60 may be changed as appropriate. For example, each insertion hole 64a and the phase line accommodation chamber 67 may be arranged in a straight line.

The lid member 71 may have a configuration in which the protruding portion 75 is omitted.
The configuration of the internal communication path 81 may be changed as appropriate. The internal communication path 81 may be, for example, a through hole that penetrates a portion of the partition wall 65 that partitions the terminal storage chamber S5 and the phase wire storage chamber 67. In addition, the internal communication path 81 may communicate the insertion hole 64 a located on the end side of the three insertion holes 64 a arranged side by side with the phase line accommodation chamber 67. Further, the number of internal communication passages 81 is not limited to one. For example, three internal communication passages 81 may be provided so that each insertion hole 64a communicates with the phase line accommodation chamber 67.

The configuration of each motor wiring insertion hole 82 may be changed as appropriate. Each motor wiring insertion hole 82 may be, for example, a through hole that penetrates the lid portion 72.
(Circle) you may change the structure of the phase wire bundle penetration part 84 suitably. For example, the phase wire bundle insertion portion 84 may be a through-hole penetrating the lid portion 72.

O Tube member 30 may be omitted. In this case, a gap is provided between the inner peripheral surface of the motor wiring insertion hole 82 and the motor wiring 27 as the external communication path 83.
○ The number of phases of the coil 26 may be changed.

The number of conducting wires that form the coil 26 may be one, or three or more.
The number of motor wires 27 inserted through one tube member 30 may be changed according to the number of conductive wires that form the coil 26. However, the inner diameter of the tube member 30 and the outer diameter of the motor wiring 27 inserted through the tube member 30 are such that a gap is provided between the inner peripheral surface 30 a of the tube member 30 and the motor wiring 27.

The number of insertion holes 64 a of the terminal receiving holes 64 of the case member 61 may be changed as appropriate according to the number of phases of the coil 26.
The case member 61 may have a configuration in which the partition wall 65 is omitted. In this case, the three insertion holes 64a and the opening 64b are integrated, and the terminal accommodation hole 64 becomes one space in which the three connection terminals 50 are accommodated.

The number of conductive member insertion holes 66 of the case member 61 may be changed according to the number of phases of the coil 26.
The number of motor wiring insertion holes 82 of the cluster block 60 may be changed as appropriate according to the number of phases of the coil 26.

  (Circle) not only the type comprised by the fixed scroll 17a and the movable scroll 17b, but the compression part 17 may be changed into a piston type, a vane type, etc., for example.

DESCRIPTION OF SYMBOLS 10 ... Electric compressor, 11 ... Housing, 17 ... Compression part, 18 ... Electric motor, 20 ... Motor drive circuit, 26 ... Coil, 27 ... Motor wiring, 28 ... Phase wire, 29a ... Phase wire connection part, 30 ... Tube Member: 32 ... Conductive member, 50 ... Connection terminal, 60 ... Cluster block, 61 ... Case member, 64 ... Terminal accommodation hole, 64b ... Opening, 67 ... Phase wire accommodation chamber, 71 ... Cover member, 81 ... Internal communication path 82, motor wiring insertion holes, S3, motor housing chamber, S5, terminal housing chamber.

Claims (3)

A compression section for compressing the refrigerant;
An electric motor that drives the compression unit and has a coil of a plurality of phases;
A motor drive circuit for driving the electric motor;
A conductive member electrically connected to the motor drive circuit;
Motor wiring drawn from each phase of the coils of the plurality of phases;
A phase wire connecting portion in which phase wires drawn from each phase of the coils of the plurality of phases are electrically connected to each other;
A connection terminal for electrically connecting the motor wiring and the conductive member;
An insulating cluster block that accommodates the connection terminal therein;
A housing forming a motor housing chamber for housing the electric motor and the cluster block;
With
The cluster block has a terminal accommodating chamber that accommodates the connection terminal, and a motor wiring insertion hole through which the motor wiring is inserted,
The terminal accommodating chamber is an electric compressor communicating with the motor accommodating chamber through the motor wiring insertion hole,
The cluster block includes a phase line accommodation chamber that accommodates the phase line connection portion, and an internal communication path that communicates the phase line accommodation chamber and the terminal accommodation chamber,
The electric compressor is characterized in that the phase line accommodation chamber and the motor accommodation chamber communicate with each other only through the internal communication path, the terminal accommodation chamber, and the motor wiring insertion hole. The cluster block includes a case member having a terminal accommodating hole for accommodating the connection terminal, and a lid member that forms the terminal accommodating chamber while fitting into the opening so as to close the opening of the terminal accommodating hole. ,
The electric compressor according to claim 1, wherein the motor wiring insertion hole is formed between an inner peripheral surface of the terminal accommodating hole and an outer peripheral surface of the lid member. An insulating tube member that covers the motor wiring and is fitted into the motor wiring insertion hole;
The electric compressor according to claim 1, wherein the terminal accommodating chamber communicates with the motor accommodating chamber via a gap between the inner side of the tube member and the motor wiring.