JP2024037419A - electric compressor - Google Patents

Abstract

To suppress such a state that air remains in resin which is charged into a cluster block.SOLUTION: A stator comprises a leader line 43, a connecting terminal 45 arranged at the leader line 43, and a cluster block 46 for accommodating the connecting terminal 45. The cluster block 46 comprises: a case member 61 having a first penetration hole 47 which an air-tight terminal 40 penetrates, a second penetration hole 48 which the leader line 43 penetrates, and a third penetration hole 49 from which resin R is exposed; and a lid member 71 having a first wall 82 for suppressing a flow of the resin R to the connecting terminal 45 side, and a second wall 81 for blocking an opening of the second penetration hole 48. The third penetration hole 49 is opened toward a clearance between the first wall 82 and the second wall 81. The case member 61 has a fourth penetration hole 50 whose opening area is smaller than the third penetration hole 49, and which is opened toward the clearance between the first wall 82 and the second wall 81, and the resin R is charged between the first wall 82 and the second wall 81.SELECTED DRAWING: Figure 3

Description

The present invention relates to an electric compressor.

The electric compressor described in Patent Document 1 electrically connects a compression section that compresses refrigerant, an electric motor that drives the compression section, an inverter that drives the electric motor, a housing, and the inverter and the electric motor. and an airtight terminal. The electric motor has a stator and a rotor. The housing houses the compression section, the electric motor and the inverter. The stator includes a leader wire drawn out from a coil wound around the stator, a connection terminal provided on the leader wire and electrically connected to the airtight terminal, and a cluster block housing the connection terminal. The cluster block includes a case member and a lid member. The case member has a first through hole into which the airtight terminal is inserted toward the connection terminal, a second through hole through which the lead wire is inserted, and a third through hole. The lid member has a first wall and a second wall. The third through hole opens between the first wall and the second wall.

The refrigerant contains lubricating oil for good lubrication of sliding parts of the electric compressor, such as the compression section. Since lubricating oil with low electrical insulation can act as a conductor that connects the connection terminals and the housing, insulation between the connection terminals and the housing is ensured by suppressing the infiltration of refrigerant into the inside of the cluster block. There is a need. In the electric compressor described in Patent Document 1, the first wall suppresses the flow of resin toward the connection terminal side. The second wall closes the opening of the second through hole. This attempts to suppress the refrigerant from entering the inside of the cluster block through the second through hole.

Patent No. 6507270

When the inside of the cluster block is filled with resin from the third through hole, there is a possibility that air may accumulate in the resin filled between the first wall and the second wall. If such air remains in the resin, the refrigerant may enter the inside of the cluster block through the remaining air in the resin, which is not preferable.

An electric compressor that solves the above problems includes a compression part that compresses refrigerant, a stator, and a rotor, an electric motor that drives the compression part, an inverter that drives the electric motor, the compression part, The stator has a housing that accommodates the electric motor and the inverter, and an airtight terminal that electrically connects the inverter and the electric motor, and the stator is pulled out from a coil wound around the stator. a lead wire, a connection terminal provided on the lead wire and electrically connected to the airtight terminal, and a cluster block accommodating the connection terminal, the cluster block facing toward the connection terminal. A case member having a first through hole through which the airtight terminal is inserted, a second through hole through which the leader wire is inserted, and a third through hole through which a resin covering the leader wire is exposed; and the leader wire. a lid member having a first wall that supports the resin and suppresses the flow of the resin toward the connection terminal side, and a second wall that closes an opening of the second through hole, the third through hole In the electric compressor that opens between the first wall and the second wall, the case member has an opening area smaller than the third through hole, and the case member has an opening between the first wall and the second wall. It is characterized by having a fourth through hole opening toward between the first wall and the second wall, and filling the space between the first wall and the second wall with the resin.

According to the above configuration, even if air accumulates in the resin filled between the first wall and the second wall when resin is filled into the inside of the cluster block from the third through hole, such air is removed. It can be discharged to the outside of the cluster block from the fourth through hole. Therefore, it is possible to suppress air from remaining in the resin filled inside the cluster block.

In the electric compressor, the lid member has an extending portion connecting the first wall and the second wall, and the opening of the fourth through hole is connected to at least one of the extending portion and the leader wire. may be provided on the opposite side to the opening of the third through hole with the third through hole in between.

According to the above configuration, when the inside of the cluster block is filled with resin from the third through hole, air tends to remain in the parts that overlap with the extension part and the part that overlap with the leader line. can be discharged to the outside of the cluster block. Therefore, it is possible to further prevent air from remaining in the resin filled inside the cluster block.

In the electric compressor, the first wall and the second wall may support the leader line closer to the third through hole than the fourth through hole.
According to the above configuration, the position of the leader line is closer to the third through hole than in the case where the leader line is located closer to the fourth through hole than the third through hole. Therefore, when the inside of the cluster block is filled with resin from the third through hole, the resin easily spreads around the leader line. Therefore, since air can be prevented from remaining around the leader line, it is possible to further suppress air from remaining in the resin filled inside the cluster block.

In the electric compressor, the fourth through hole may be filled with the resin and may be exposed.
According to the above configuration, the operator can confirm that a sufficient amount of resin has been filled inside the cluster block by visually observing that the fourth through hole is filled with resin and exposed. can.

According to this invention, it is possible to suppress air from remaining in the resin filled inside the cluster block.

It is a sectional view of an electric compressor in an embodiment. It is a top view of a cluster block. 6 is a sectional view taken along line 3-3 in FIG. 5. FIG. It is an exploded perspective view of a cluster block, a connection terminal, and a leader line. It is a side view of a cluster block. FIG. 3 is a perspective view of a cluster block. It is a perspective view which expands and shows a part of cluster block. It is a perspective view of a lid member. It is a top view of a cluster block. FIG. 3 is a cross-sectional view for explaining filling of resin into the inside of a cluster block.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electric compressor will be described below with reference to the drawings.
<Overall configuration of electric compressor>
As shown in FIG. 1, the electric compressor 10 has a housing 11. As shown in FIG. The housing 11 includes a discharge housing 12, a motor housing 13, and an inverter case 14. The discharge housing 12, the motor housing 13, and the inverter case 14 are made of metal, for example, aluminum.

The motor housing 13 has a plate-shaped end wall 13a and a peripheral wall 13b extending in a cylindrical shape from the outer periphery of the end wall 13a. The discharge housing 12 is cylindrical. The discharge housing 12 is connected to an end of the peripheral wall 13b of the motor housing 13 on the opposite side to the end wall 13a. Inverter case 14 is cylindrical. Inverter case 14 is connected to end wall 13a of motor housing 13. A housing space S1 is defined by the end wall 13a of the motor housing 13 and the inverter case 14.

A cylindrical boss portion 13c is provided at the center of the end wall 13a of the motor housing 13. The axis of the boss portion 13c coincides with the axis of the peripheral wall 13b of the motor housing 13. Furthermore, a through hole 13h is formed in the end wall 13a of the motor housing 13. The through hole 13h passes through the end wall 13a of the motor housing 13 in the thickness direction. The through hole 13h is located closer to the peripheral wall 13b than the boss portion 13c.

The electric compressor 10 includes a rotating shaft 15, a compression section 16, an electric motor 20, and an inverter 17. The rotating shaft 15, the compression section 16, and the electric motor 20 are housed within the motor housing 13. The inverter 17 is housed in the housing space S1. Therefore, the housing 11 accommodates the compression section 16, the electric motor 20 and the inverter 17. The direction in which the rotation axis L1 of the rotation shaft 15 extends is referred to as an axial direction X. The axis of the peripheral wall 13b of the motor housing 13 extends in the axial direction X. Note that directions perpendicular to the axial direction X and mutually orthogonal are referred to as a first direction Y and a second direction Z.

The compression section 16 includes a fixed scroll 16a and a movable scroll 16b. Fixed scroll 16a is fixed to motor housing 13. The movable scroll 16b is arranged opposite to the fixed scroll 16a. The compression section 16 is driven by the rotation of the rotating shaft 15. The compression section 16 compresses the refrigerant by being driven. A compression chamber S2 whose volume can be changed is defined between the fixed scroll 16a and the movable scroll 16b. A discharge chamber S3 is defined between the fixed scroll 16a and the discharge housing 12. The refrigerant compressed by changing the volume of the compression chamber S2 is discharged into the discharge chamber S3. The electric motor 20 drives the compression section 16 by rotating the rotating shaft 15 .

The compression section 16 and the electric motor 20 are arranged side by side in the axial direction X. The electric motor 20 is arranged closer to the end wall 13a of the motor housing 13 than the compression section 16 is. The compression section 16, the electric motor 20, and the inverter 17 are arranged in this order in the axial direction X.

The electric compressor 10 includes a shaft support member 18 . The shaft support member 18 is arranged between the compression section 16 and the electric motor 20. Therefore, the shaft support member 18 serves as a partition between the electric motor 20 and the compression section 16. An insertion hole 18h is formed in the center of the shaft support member 18. The axis of the insertion hole 18h of the shaft support member 18 coincides with the axis of the boss portion 13c. The first end of the rotating shaft 15 is inserted into the insertion hole 18h of the shaft support member 18. A radial bearing 19b is provided between the insertion hole 18h of the shaft support member 18 and one end of the rotating shaft 15. A first end of the rotating shaft 15 is rotatably supported by the shaft support member 18 via a radial bearing 19b. Further, the second end portion of the rotating shaft 15 is inserted inside the boss portion 13c. A radial bearing 19a is provided between the boss portion 13c and the second end of the rotating shaft 15. The second end of the rotating shaft 15 is rotatably supported by the boss portion 13c via a radial bearing 19a.

The electric motor 20 has a stator 22 and a rotor 21. The rotor 21 has a cylindrical rotor core 21a. The rotor core 21a is fixedly attached to the rotating shaft 15. A plurality of permanent magnets (not shown) are embedded in the rotor core 21a.

The stator 22 has an annular stator core 23. The rotor 21 is arranged inside the stator core 23. The stator core 23 is fixed to the inner peripheral surface of the peripheral wall 13b of the motor housing 13. Therefore, stator core 23 is fixed to the inner peripheral surface of housing 11. The stator 22 is assembled to the housing 11 by, for example, fitting the stator core 23 into the inner peripheral surface of the peripheral wall 13b of the motor housing 13 by shrink fitting.

Stator core 23 has a first end surface 23a and a second end surface 23b. The first end surface 23a is an end surface located on one side in the direction in which the axis of the stator core 23 extends. The second end surface 23b is an end surface located on the other side in the direction in which the axis of the stator core 23 extends. Stator core 23 is arranged within motor housing 13 such that first end surface 23a faces end wall 13a of motor housing 13. Therefore, the first end surface 23a is located closer to the inverter 17 than the second end surface 23b. The second end surface 23b is located closer to the compression section 16 than the first end surface 23a.

A plurality of coils 28U, 28V, and 28W for U-phase, V-phase, and W-phase are wound around stator core 23, respectively. That is, the stator 22 is wound with coils 28U, 28V, and 28W. A first coil end 28a, which is a part of the coils 28U, 28V, and 28W of each phase, protrudes from the first end surface 23a of the stator core 23. A second coil end 28b, which is a part of the coils 28U, 28V, and 28W of each phase, protrudes from the second end surface 23b of the stator core 23.

The stator 22 includes a connector 44. Connector 44 is housed within motor housing 13. The connector 44 is provided in a region within the motor housing 13 where the first coil end 28a is located and between the first end surface 23a of the stator core 23 and the end wall 13a of the motor housing 13.

<Airtight terminal>
As shown in FIGS. 1 and 2, the electric compressor 10 has an airtight terminal 40. As shown in FIGS. The airtight terminal 40 is housed within the housing 11. The airtight terminal 40 has three conductive members 41 corresponding to the coils 28U, 28V, and 28W of each phase. Each conductive member 41 is a cylindrical metal terminal extending linearly. The axis of each conductive member 41 extends in the axial direction X. A first end of each conductive member 41 is electrically connected to the inverter 17 within the accommodation space S1. Thereby, the airtight terminal 40 is electrically connected to the inverter 17. The second end of each conductive member 41 projects into the motor housing 13 from the accommodation space S1 via the through hole 13h.

As shown in FIG. 1, the airtight terminal 40 has a support plate 42. As shown in FIG. The support plate 42 supports the three conductive members 41 in a mutually insulated state. The support plate 42 is fixed in the accommodation space S1 around the through hole 13h on the outer surface of the end wall 13a.

<Leader line>
As shown in FIGS. 1 and 2, the connector 44 includes a leader line 43. As shown in FIGS. In other words, the stator 22 includes the leader line 43. The lead wire 43 is drawn out from the coils 28U, 28V, and 28W wound around the stator 22. The lead wire 43 is drawn out from the first coil end 28a of the coils 28U, 28V, and 28W of each phase. The lead wires 43 are drawn out from the electric motor 20 one by one corresponding to each phase. Therefore, three lead wires 43 are drawn out from the electric motor 20. A part of the lead wire 43 of each phase is covered with a cylindrical insulating tube member 30. The other portions of the lead wires 43 of each phase are exposed from the tube member 30.

<Connection terminal>
As shown in FIG. 1, the connector 44 includes a connection terminal 45. As shown in FIG. In other words, the stator 22 includes the connection terminals 45. The connection terminal 45 is provided on the leader line 43. One connection terminal 45 is provided for each phase lead wire 43. Therefore, the stator 22 has three connection terminals 45. Note that in FIG. 1, only one connection terminal 45 is illustrated. The three connection terminals 45 correspond to the coils 28U, 28V, and 28W of each phase.

The connection terminal 45 is electrically connected to the airtight terminal 40. Thereby, the airtight terminal 40 electrically connects the inverter 17 and the electric motor 20. Electric power from the inverter 17 is supplied to the electric motor 20 via each conductive member 41, each connection terminal 45, and each lead wire 43. As a result, the electric motor 20 is driven. Therefore, inverter 17 drives electric motor 20. The compression section 16 is driven as the electric motor 20 is driven, so that the compression section 16 compresses the refrigerant.

As shown in FIG. 3, each connection terminal 45 has a first connection portion 45a located at one end of each connection terminal 45 in the first direction Y, and a first connection portion 45a located at the other end of each connection terminal 45 in the first direction Y. 2 connection part 45b. The first connecting portion 45a is cylindrical. By inserting the conductive member 41 into the first connecting portion 45a, the connecting terminal 45 and the airtight terminal 40 are electrically connected to each other. The second connecting portion 45b extends in the first direction Y from the first connecting portion 45a. An end portion of the leader wire 43 is connected to the second connection portion 45b. Thereby, the connection terminal 45 electrically connects the airtight terminal 40 and the lead wire 43.

<Cluster block>
Connector 44 includes cluster block 46 . In other words, the stator 22 includes cluster blocks 46. Cluster block 46 accommodates connection terminals 45 . Three connection terminals 45 are fixed inside the cluster block 46.

The cluster block 46 includes a case member 61 and a lid member 71. The case member 61 and the lid member 71 are insulating members.
<Case members>
The case member 61 has a first case part 62 and a second case part 63. The first case portion 62 has a cylindrical shape extending in the first direction Y. The second case part 63 closes one end of the openings at both ends of the first case part 62 in the first direction Y. Case member 61 has a first through hole 47 , a second through hole 48 , and a third through hole 49 .

As shown in FIG. 4, the first case portion 62 includes a pair of first case walls 62a and a pair of second case walls 62b. The pair of first case walls 62a and the pair of second case walls 62b have a flat plate shape. The lengths of the pair of first case walls 62a and the lengths of the pair of second case walls 62b extend in the first direction Y. The pair of second case walls 62b are erected between the pair of first case walls 62a, and connect the ends of the pair of first case walls 62a in the second direction Z.

As shown in FIGS. 2 and 3, three first through holes 47 are formed in the first case portion 62. As shown in FIGS. The three first through holes 47 are located at offset positions in the first direction Y in the first case portion 62. The three first through holes 47 penetrate one of the pair of first case walls 62a.

The case member 61 has three first cylindrical portions 62c. Each first cylindrical portion 62c has a cylindrical shape extending from the outer surface of the first case wall 62a in which the first through hole 47 is formed. The first cylindrical portion 62c surrounds the first through hole 47. The inside of each first cylindrical portion 62c communicates with the three first through holes 47.

As shown in FIG. 3, the airtight terminal 40 is inserted into the first through hole 47 toward the connection terminal 45. As shown in FIG. Specifically, the end portion of the conductive member 41 in the airtight terminal 40 is inserted into the first through hole 47 through the inside of the first cylindrical portion 62c. The end portion of the conductive member 41 inserted through the first through hole 47 is inserted into the first connecting portion 45a within the cluster block 46. Inside the first cylindrical portion 62c, the axis of the conductive member 41 is parallel to the axis of the first cylindrical portion 62c.

A cylindrical sealing member 41a is inserted into each first cylindrical portion 62c. The outer peripheral surface of the sealing member 41a is in contact with the inner peripheral surface of the first cylindrical portion 62c. The inner peripheral surface of the sealing member 41a is in contact with the outer peripheral surface of the conductive member 41 inside the first cylindrical portion 62c. Therefore, since the inside of the first cylindrical part 62c is closed by the conductive member 41 and the sealing member 41a, communication between the inside and the outside of the cluster block 46 via the first cylindrical part 62c and the first through hole 47 is cut off. ing. Infiltration of the refrigerant into the inside of the cluster block 46 via the first through hole 47 can be suppressed.

The second through hole 48 is formed on the side of the first case portion 62 opposite to the second case portion 63 in the first direction Y. A leader wire 43 is inserted through the second through hole 48 . Of the lead wires 43 of each phase, the portion covered by the tube member 30 extends between the inside and outside of the cluster block 46 via the second through hole 48 .

As shown in FIG. 5, the second through hole 48 is defined by a pair of first case walls 62a and a pair of second case walls 62b. The second through hole 48 has a substantially rectangular shape when viewed from the first direction Y.

The first case portion 62 has three convex portions 66. The three convex portions 66 protrude from the inner surface of one of the pair of first case walls 62a toward the other first case wall 62a. The three convex portions 66 are spaced apart from each other in the second direction Z. Each convex portion 66 is located inside the second through hole 48 .

A groove 64 is formed at the protruding end of each convex portion 66 . The groove 64 has an arc shape when viewed from the first direction Y, and is formed by a curved surface. The groove 64 has a shape along the outer peripheral surface of the tube member 30. The groove 64 is formed in the protrusion 66 so as to extend in the first direction Y.

As shown in FIGS. 3 and 4, the third through hole 49 is formed in the first case portion 62. As shown in FIGS. The third through hole 49 is located in the first case portion 62 at a position offset to the opposite side of the first through hole 47 in the first direction Y. Of the pair of first case walls 62a, the third through hole 49 passes through the first case wall 62a in which the first through hole 47 is not formed.

The case member 61 has a second cylindrical portion 62d. The second cylindrical portion 62d has a cylindrical shape extending from the outer surface of the first case portion 62. The second cylindrical portion 62d surrounds the third through hole 49. The inside of the second cylindrical portion 62d communicates with the third through hole 49.

As shown in FIGS. 4 and 6, resin R is filled from the outside to the inside of the cluster block 46 via the second cylindrical portion 62d and the third through hole 49. Therefore, the third through hole 49 is for filling the resin R. Inside the cluster block 46, the resin R covers the leader line 43. The resin R covering the leader wire 43 is exposed through the third through hole 49 . The resin R is, for example, an adhesive. The inside of the cluster block 46, the inside of the third through hole 49, and the inside of the second cylindrical portion 62d are filled with resin R.

As shown in FIGS. 4 and 7, an engagement hole 65 is formed in each of the pair of second case walls 62b. The engagement hole 65 is a through hole that penetrates the second case wall 62b. The engagement hole 65 is located at an end that partitions the second through hole 48, of both ends of the second case wall 62b in the first direction Y.

<Lid member>
As shown in FIG. 8, the lid member 71 has three mounting parts 72. Each mounting portion 72 has a substantially rectangular shape that extends in the first direction Y when viewed from the axial direction X. Each mounting section 72 has a first mounting section 73 and a second mounting section 74. The first mounting section 73 and the second mounting section 74 are adjacent to each other in the first direction Y. An insertion hole 75 is formed in the first mounting portion 73 . The insertion hole 75 of the first mounting part 73 is a through hole that penetrates the first mounting part 73 in the axial direction X.

As shown in FIG. 3, one connection terminal 45 and a leader wire 43 connected to the connection terminal 45 are placed on each placement portion 72. The lid member 71 is inserted into the case member 61 through the second through hole 48 with the connection terminal 45 and the lead wire 43 placed on the placement portion 72 . Therefore, the second through hole 48 is set to a size that allows the three placement parts 72 with the connection terminals 45 and the lead wires 43 placed thereon to be inserted therethrough. Each mounting portion 72 is located inside the case member 61.

The connection terminal 45 is placed on the first placing portion 73 of each placing portion 72 . A leader wire 43 covered with the tube member 30 is placed on the second placing part 74 of each placing part 72 . The insertion hole 75 of each mounting portion 72 faces the first through hole 47 of the case member 61 and the inside of the connection terminal 45 in the axial direction X. The conductive member 41 inserted into the first through hole 47 is inserted into the inside of the connection terminal 45 via the insertion hole 75 of each mounting portion 72 .

As shown in FIG. 8, the lid member 71 has a pair of walls 80. As shown in FIG. One of the pair of walls 80 is referred to as a first wall 82, and the other is referred to as a second wall 81. That is, the lid member 71 has a first wall 82 and a second wall 81. The first wall 82 and the second wall 81 face each other in the first direction Y. Each of the first wall 82 and the second wall 81 has a plate shape that is thick in the first direction Y. The first wall 82 has an outer peripheral surface 82a extending along the outer edge of the first wall 82. The second wall 81 has an outer peripheral surface 81a extending along the outer edge of the second wall 81.

As shown in FIG. 5, the second wall 81 and the first wall 82 are inserted into the first case part 62 through the second through hole 48. Therefore, the pair of walls 80 are inserted through the second through hole 48.

The outer peripheral surface 81a of the second wall 81 extends along the inner surfaces of the pair of first case walls 62a and the inner surfaces of the pair of second case walls 62b, and is in contact with these inner surfaces. The second wall 81 is fitted into the second through hole 48 . Therefore, the second wall 81 closes the opening of the second through hole 48 . Communication between the inside and outside of the cluster block 46 via the second through hole 48 is blocked. With the second wall 81 fitted into the second through hole 48 , one end surface of the second wall 81 in the first direction Y surrounds the second through hole 48 in the first case portion 62 . It is flush with the end surface. The other end surface of the second wall 81 in the first direction Y is located inside the first case portion 62.

As shown in FIGS. 5 and 8, the second wall 81 has three first grooves 83. Each first groove 83 is located at an end of the second wall 81 in the axial direction X. Each first groove 83 is formed to be recessed in the axial direction X from the outer circumferential surface 81a of the second wall 81. The three first grooves 83 are separated from each other in the second direction Z. Each first groove 83 penetrates the second wall 81 in the thickness direction of the second wall 81. The first groove 83 has an arc shape when viewed from the first direction Y, and is formed by a curved surface. The first groove 83 has a shape along the outer peripheral surface of the tube member 30. The first groove 83 is formed in the second wall 81 so as to extend in the first direction Y.

As shown in FIG. 5, the first groove 83 of the lid member 71 defines a leader wire insertion hole 90 together with the groove 64 of the case member 61. The leader line insertion hole 90 has a circular shape when viewed from the first direction Y. The leader wire 43 covered by the tube member 30 is inserted into the leader wire insertion hole 90 . The diameter of the leader wire insertion hole 90 is smaller than the outer diameter of the tube member 30. Therefore, the tube member 30 is pressed from the outside by the groove 64 and the first groove 83 that constitute the leader wire insertion hole 90. The outer peripheral surface of the tube member 30 is in contact with the groove 64 and the first groove 83. Therefore, the lid member 71 supports the leader line 43. The leader wire 43 covered by the tube member 30 is supported by the case member 61 and the lid member 71 in the leader wire insertion hole 90 .

As shown in FIG. 8, the first wall 82 is located at the end of each mounting portion 72 in the first direction Y. As shown in FIG. That is, the lid member 71 has three first walls 82. Each first wall 82 has a second groove 84 . The second groove 84 is located at the end of each first wall 82 in the axial direction X. The second groove 84 is formed to be recessed in the axial direction X from the outer peripheral surface 82a of the first wall 82. The second groove 84 penetrates the first wall 82 in the thickness direction of each first wall 82 . The second groove 84 has an arc shape when viewed from the first direction Y, and is formed by a curved surface. The second groove 84 has a shape along the outer peripheral surface of the tube member 30. The second groove 84 is formed in the first wall 82 so as to extend in the first direction Y.

Each second groove 84 faces the first groove 83 in the first direction Y. The leader wire 43 covered by the tube member 30 is placed in the first groove 83 and the second groove 84 . Thereby, the second groove 84 supports the leader wire 43 covered by the tube member 30 together with the first groove 83 . Therefore, the first wall 82 and the second wall 81 support the leader line 43.

As shown in FIG. 3, when the lid member 71 is inserted into the case member 61 from the second through hole 48, the outer circumferential surface 82a of the first wall 82 and the outer circumferential surface 81a of the second wall 81 are connected to the first case. In contact with the inner surface of the portion 62. A portion of the leader wire 43 covered by the tube member 30 located between the first groove 83 and the groove 64 is pressed against the first case portion 62 by the second wall 81 . A portion of the leader wire 43 covered by the tube member 30 located between the second groove 84 and the inner surface of the first case portion 62 is pressed against the first case portion 62 by the first wall 82 . As a result, a filling space 91 is defined between the first wall 82 and the second wall 81 in the first direction Y inside the case member 61 .

The first wall 82 and the second wall 81 are located between the second through hole 48 and the connection terminal 45 in the first direction Y. The third through hole 49 opens between the first wall 82 and the second wall 81 . Therefore, the filling space 91 communicates with the third through hole 49 . The resin R filled from the third through hole 49 fills the filling space 91 . The first wall 82 suppresses the flow of the resin R toward the connection terminal 45 side. The pair of walls 80 block the resin R filled from the third through hole 49 between the second through hole 48 and the connection terminal 45 . A resin R is filled between the first wall 82 and the second wall 81. Inside the cluster block 46, a space between the second through hole 48 and the connection terminal 45 in the first direction Y is sealed with resin R. It is possible to suppress the refrigerant from entering from the second through hole 48 toward the connection terminal 45 inside the cluster block 46 .

As shown in FIGS. 4 and 7, an engaging protrusion 85 is formed on the second wall 81. As shown in FIGS. The engaging protrusions 85 are located at both ends of the second wall 81 in the second direction Z, and protrude from the outer circumferential surface 81a of the second wall 81. When the lid member 71 is inserted into the case member 61 through the second through hole 48 , the engagement convex portion 85 is inserted into each of the two engagement holes 65 of the first case portion 62 , so that the engagement occurs. The protrusion 85 is engaged with the engagement hole 65. Thereby, the lid member 71 is fixed to the case member 61.

As shown in FIG. 8, the lid member 71 has an extending portion 86 that connects the first wall 82 and the second wall 81. As shown in FIG. The extending portion 86 extends in the first direction Y between the first wall 82 and the second wall 81. The extending portion 86 of this embodiment extends from each of one first wall 82 located at one end in the second direction Z and one first wall 82 located at the other end in the second direction Z. There is. Therefore, the lid member 71 has two extending portions 86. The two extending portions 86 are separated from each other in the second direction Z. Each extending portion 86 has a flat plate shape extending perpendicularly to the axial direction X.

<Fourth through hole>
As shown in FIGS. 3 and 9, the case member 61 has a fourth through hole 50. In this embodiment, the case member 61 has a plurality of fourth through holes 50. Each fourth through hole 50 is formed in the first case portion 62. Each of the fourth through holes 50 is located at a position in the first case portion 62 that is offset toward the opposite side of the first through hole 47 in the first direction Y.

The fourth through hole 50 has a smaller opening area than the third through hole 49. Each of the fourth through holes 50 penetrates the first case wall 62a in which the first through hole 47 is formed, of the pair of first case walls 62a. The first case wall 62a in which the fourth through hole 50 is formed is different from the first case wall 62a in which the third through hole 49 is formed. That is, the fourth through hole 50 is provided on the opposite side of the case member 61 from the third through hole 49 in the axial direction X. The fourth through hole 50 faces the third through hole 49 in the axial direction X. In this embodiment, all the fourth through holes 50 of the case member 61 face the third through holes 49 in the axial direction X.

As shown in FIG. 3, the opening of the fourth through hole 50 is provided on the opposite side from the opening of the third through hole 49, with at least one of the extension portion 86 and the leader line 43 interposed therebetween. The opening of the fourth through hole 50 shown in FIG. 3 and the opening of the third through hole 49 sandwich both the extension portion 86 and the leader wire 43.

The fourth through hole 50 is located away from the leader line 43 in the axial direction X. The leader line 43 extends near the opening of the third through hole 49 into the case member 61 . Therefore, the fourth through hole 50 is further away from the leader line 43 in the axial direction X than the third through hole 49 is. In other words, the first wall 82 and the second wall 81 support the leader wire 43 so as to be closer to the third through hole 49 than to the fourth through hole 50.

The fourth through hole 50 opens between the first wall 82 and the second wall 81 . Filling space 91 communicates with fourth through hole 50 . The resin R filled in the filling space 91 from the third through hole 49 reaches the inside of the fourth through hole 50. As a result, each fourth through hole 50 is filled with resin R and exposed. A portion of the resin R filled in the fourth through hole 50 is exposed from the fourth through hole 50 so as to bulge outside the cluster block 46 . The resin R exposed from the fourth through hole 50 in this way is referred to as an exposed portion R1. The exposed portion R1 is visible from the outside of the cluster block 46. Note that the exposed portion R1 may be exposed from some of the fourth through holes 50 among the plurality of fourth through holes 50, or may be exposed from all of the fourth through holes 50.

<Resin filling method>
When filling the inside of the cluster block 46 with the resin R, the lid member 71 is inserted into the second through hole while the connecting terminal 45 and the leader wire 43 covered by the tube member 30 are placed on the placing part 72. 48 into the inside of the case member 61. As a result, a filling space 91 between the pair of walls 80 is formed inside the cluster block 46 at a position communicating with the third through hole 49 and the fourth through hole 50.

As shown in FIG. 10, the nozzle 92 fills the resin R. When the resin R is filled, the posture of the case member 61 is maintained such that the third through hole 49 faces upward in the direction of gravity. With the tip of the nozzle 92 inserted into the second cylindrical portion 62d, the filling space 91 is filled with the resin R from the nozzle 92 through the third through hole 49. Filling of the resin R may be performed through a plurality of locations in the third through hole 49 while changing the position of the nozzle 92.

As shown in FIGS. 3 and 10, the resin R filled from the third through hole 49 spreads into the filling space 91 due to its own weight. The resin R flows around the tube member 30 adjacent to the third through hole 49 . Thereby, the leader wire 43 covered by the tube member 30 is fixed to the cluster block 46 via the resin R. The resin R flows between the tube members 30 in a direction lower than the tube members 30 in the direction of gravity.

The flow of the resin R from the filling space 91 toward the second through hole 48 is blocked by the second wall 81 . The flow of the resin R from the filling space 91 toward the connection terminal 45 is blocked by the first wall 82 . Therefore, the pair of walls 80 block the resin R filled from the third through hole 49 between the second through hole 48 and the connection terminal 45 . The resin R flows around the extension portion 86 while spreading into the filling space 91 . The resin R flows between the extending portions 86 to a portion of the filling space 91 located below the extending portions 86 in the direction of gravity.

When filling the filling space 91 with the resin R, air may accumulate in areas where the resin R is difficult to flow. Since the fourth through hole 50 communicates with the filling space 91, air accumulated in the filling space 91 can be discharged to the outside of the cluster block 46 via the fourth through hole 50. That is, the fourth through hole 50 is for removing air accumulated between the first wall 82 and the second wall 81.

In particular, air tends to accumulate at a position away from the third through hole 49 filled with the resin R. The fourth through hole 50 is formed in the first case wall 62a facing in the axial direction X to the first case wall 62a in which the third through hole 49 is formed. The fourth through hole 50 opens into the inside of the cluster block 46 at a location away from the third through hole 49, which is a location in the filling space 91 where air tends to accumulate. Therefore, air trapped between the first wall 82 and the second wall 81 easily escapes to the outside of the cluster block 46 via the fourth through hole 50.

The resin R flows from the filling space 91 into the fourth through hole 50 . A portion of the resin R filled inside the fourth through hole 50 is exposed to the outside of the cluster block 46 from the fourth through hole 50 as an exposed portion R1. When the filling of the resin R into the cluster block 46 is completed, the filled resin R is thermally hardened.

[Action and effect]
According to the above embodiment, the following actions and effects can be obtained.
(1) The case member 61 has the fourth through hole 50 that opens between the first wall 82 and the second wall 81. A resin R is filled between the first wall 82 and the second wall 81. Therefore, even if air accumulates in the resin R filled between the first wall 82 and the second wall 81 when the inside of the cluster block 46 is filled with resin R from the third through hole 49, Air can be exhausted to the outside of the cluster block 46 through the fourth through hole 50. Therefore, it is possible to prevent air from remaining in the resin R filled inside the cluster block 46.

(2) The lid member 71 has an extending portion 86 that connects the first wall 82 and the second wall 81. The opening of the fourth through hole 50 is provided on the opposite side to the opening of the third through hole 49, with at least one of the extension portion 86 and the leader line 43 interposed therebetween. When the resin R is filled into the cluster block 46 from the third through hole 49, air tends to remain in the areas that overlap with the extension portion 86 and the leader line 43. can be discharged to the outside of the cluster block 46. Therefore, it is possible to further prevent air from remaining in the resin R filled inside the cluster block 46.

(3) The first wall 82 and the second wall 81 support the leader line 43 so that it is closer to the third through hole 49 than the fourth through hole 50. The position of the leader line 43 is closer to the third through hole 49 than in the case where the leader line 43 is located closer to the fourth through hole 50 than the third through hole 49 . Therefore, when the inside of the cluster block 46 is filled with resin R from the third through hole 49, the resin R is easily distributed around the leader line 43. Therefore, since air can be prevented from remaining around the leader line 43, it is possible to further suppress air from remaining in the resin R filled inside the cluster block 46.

(4) The fourth through hole 50 is filled with resin R and exposed. Therefore, by visually observing that the fourth through hole 50 is filled with the resin R, the operator can confirm that a sufficient amount of the resin R has been filled inside the cluster block 46.

(5) The case member 61 has a second cylindrical portion 62d that communicates with the third through hole 49. Therefore, even if the resin R overflows from the third through hole 49 to the outside of the cluster block 46 when the resin R is filled from the third through hole 49, this resin R cannot be blocked by the second cylindrical portion 62d. Can be done. Therefore, the efficiency of filling the inside of the cluster block 46 with the resin R can be improved.

(6) An engagement hole 65 is formed in the case member 61. The lid member 71 has an engaging protrusion 85 . When the lid member 71 is inserted into the case member 61 from the second through hole 48 , the engagement protrusions 85 are inserted into each of the engagement holes 65 , so that the engagement protrusions 85 are inserted into the engagement holes 65 . is engaged with. Thereby, since the lid member 71 is fixed to the case member 61, it is possible to suppress the lid member 71 from coming off from the case member 61.

[Example of change]
Note that the above embodiment can be modified and implemented as follows. The above embodiment and the following modification examples can be implemented in combination with each other within a technically consistent range.

The number of connection terminals 45 and lead wires 43 may be changed as appropriate depending on the number of phases of coils 28U, 28V, and 28W. The number of placement parts 72 in the lid member 71 may be changed in accordance with the change in the number of connection terminals 45 and lead wires 43.

○ The shape and number of the engagement hole 65 and the engagement protrusion 85 can be changed as appropriate. The engagement hole 65 may be omitted from the case member 61. The engaging protrusion 85 may be omitted from the lid member 71.
○ The second cylindrical portion 62d may be omitted from the case member 61.

○ The first cylindrical portion 62c may be omitted from the case member 61. In this case, for example, the first through hole 47 may be closed by inserting the sealing member 41a into the first through hole 47 together with the conductive member 41.

○ The fourth through hole 50 does not need to be filled with the resin R.
The first wall 82 and the second wall 81 may support the leader wire 43 so as to be closer to the fourth through hole 50 than to the third through hole 49. The first wall 82 and the second wall 81 may support the leader line 43 so that the third through hole 49 and the fourth through hole 50 are the same distance from the leader line 43.

○ Neither the extending portion 86 nor the leader wire 43 need be sandwiched between the opening of the third through hole 49 and the opening of the fourth through hole 50.
○ The shape and number of the extending portions 86 formed on the lid member 71 can be changed as appropriate. The extending portion 86 may be omitted from the lid member 71.

The first through hole 47 and the third through hole 49 may be formed in the same first case wall 62a.
The fourth through hole 50 may be formed in the case member 61 at a position offset from a position facing the third through hole 49 in the axial direction X. In short, it is sufficient that the fourth through hole 50 is formed in the case member 61 at a position where it can open between the first wall 82 and the second wall 81 . The fourth through hole 50 in this case also allows the air accumulated between the first wall 82 and the second wall 81 to be removed.

The compression section 16 is not limited to the type composed of the fixed scroll 16a and the movable scroll 16b, but may be changed to a piston type or a vane type, for example.

R... Resin, 10... Electric compressor, 11... Housing, 16... Compression part, 17... Inverter, 20... Electric motor, 21... Rotor, 22... Stator, 28U, 28V, 28W... Coil, 40... Airtight terminal, 43 ...Leader wire, 45... Connection terminal, 46... Cluster block, 47... First through hole, 48... Second through hole, 49... Third through hole, 50... Fourth through hole, 61... Case member, 71... Lid Members, 81...second wall, 82...first wall, 86...extension portion.

Claims (4)

a compression section that compresses refrigerant;
an electric motor having a stator and a rotor and driving the compression section;
an inverter that drives the electric motor;
a housing that accommodates the compression section, the electric motor, and the inverter;
an airtight terminal electrically connecting the inverter and the electric motor;
The stator is
a leader wire pulled out from a coil wound around the stator;
a connection terminal provided on the leader line and electrically connected to the airtight terminal;
a cluster block accommodating the connection terminal,
The cluster block is
A case including a first through hole through which the airtight terminal is inserted toward the connection terminal, a second through hole through which the leader wire is inserted, and a third through hole through which resin covering the leader wire is exposed. parts and
a lid member having a first wall that supports the leader wire and suppresses the flow of the resin toward the connection terminal, and a second wall that closes the opening of the second through hole;
In an electric compressor, the third through hole opens between the first wall and the second wall,
The case member has a fourth through hole that has a smaller opening area than the third through hole and opens toward between the first wall and the second wall,
An electric compressor, wherein the resin is filled between the first wall and the second wall. The lid member has an extending portion connecting the first wall and the second wall,
The electric compression according to claim 1, wherein the opening of the fourth through hole is provided on a side opposite to the opening of the third through hole, with at least one of the extending portion and the leader line in between. Machine. The electric compressor according to claim 2, wherein the first wall and the second wall support the leader line closer to the third through hole than the fourth through hole. The electric compressor according to any one of claims 1 to 3, wherein the fourth through hole is filled with the resin and exposed.

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