Electric compressor

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

[Technical Field]

[0001] The present invention relates to an electric compressor. [Background technology]

[0002] The electric compressor described in Patent Document 1 includes a compression unit that compresses a refrigerant, an electric motor that drives the compression unit, an inverter that drives the electric motor, a housing, and a hermetic terminal that electrically connects the inverter and the electric motor. The electric motor includes a stator and a rotor. The housing accommodates the compression unit, the electric motor, and the inverter. The stator includes a lead wire drawn from a coil wound around the stator, a connection terminal attached to the lead wire and electrically connected to the hermetic terminal, and a cluster block that accommodates the connection terminal. The cluster block includes a case member and a cover member. The case member includes a first through hole through which the hermetic terminal is inserted toward the connection terminal, a second through hole through which the lead wire is inserted, and a third through hole. The cover member includes a first wall and a second wall. The third through hole opens toward the gap between the first wall and the second wall.

[0003] The refrigerant contains lubricating oil to improve lubrication of sliding parts of the electric compressor, such as the compression section. Lubricating oil with low electrical insulation properties can act as a conductor, causing electrical conduction between the connection terminal and the housing, so it is necessary to ensure insulation between the connection terminal and the housing by suppressing the refrigerant from penetrating into the cluster block. In the electric compressor described in Patent Document 1, the first wall suppresses the flow of resin toward the connection terminal. The second wall blocks the opening of the second through-hole. This suppresses the refrigerant from penetrating into the cluster block through the second through-hole. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6507270 Summary of the Invention [Problem to be solved by the invention]

[0005] When resin is filled into the cluster block through the third through-hole, air may accumulate in the resin filled between the first and second walls. If such air remains in the resin, the refrigerant may enter the cluster block through the remaining air in the resin, which is undesirable. [Means for solving the problem]

[0006] The electric compressor that solves the above problem has a compression unit that compresses a refrigerant, a stator, and a rotor, and also has an electric motor that drives the compression unit, an inverter that drives the electric motor, a housing that accommodates the compression unit, the electric motor, and the inverter, and a sealed terminal that electrically connects the inverter and the electric motor, the stator includes a lead wire drawn from a coil wound around the stator, a connection terminal that is provided on the lead wire and is electrically connected to the sealed terminal, and a cluster block that accommodates the connection terminal, and the cluster block has the seal wire facing the connection terminal. An electric compressor comprising: a case member having a first through hole through which a terminal is inserted, a second through hole through which a lead wire is inserted, and a third through hole through which resin covering the lead wire is exposed; and a cover member having a first wall that supports the lead wire and suppresses the flow of the resin toward the connection terminal, and a second wall that blocks the opening of the second through hole, wherein the third through hole opens toward the space between the first wall and the second wall; characterized in that the case member has a fourth through hole that has an opening area smaller than that of the third through hole and opens toward the space between the first wall and the second wall, and the resin is filled between the first wall and the second wall.

[0007] According to the above configuration, even if air accumulates in the resin filled between the first and second walls when the resin is filled into the cluster block through the third through hole, the air can be discharged to the outside of the cluster block through the fourth through hole, thereby preventing air from remaining in the resin filled into the cluster block.

[0008] In the electric compressor, the cover member may have an extension portion connecting the first wall and the second wall, and the opening of the fourth through hole may be located on the opposite side to the opening of the third through hole, with at least one of the extension portion and the lead-out wire sandwiched therebetween.

[0009] With this configuration, air tends to remain in the areas overlapping with the extensions and the lead wires when resin is filled into the cluster block through the third through-hole, but this air can be expelled to the outside of the cluster block through the fourth through-hole, thereby further preventing air from remaining in the resin filled into the cluster block.

[0010] In the electric compressor, the first wall and the second wall may support the lead wire so that the lead wire is closer to the third through hole than to the fourth through hole. According to the above configuration, the position of the lead wire is closer to the third through hole than when the lead wire is closer to the fourth through hole than the third through hole. Therefore, when resin is filled into the interior of the cluster block through the third through hole, the resin is more likely to spread around the lead wire. Therefore, air is less likely to remain around the lead wire, which further reduces air remaining in the resin filled inside the cluster block.

[0011] In the electric compressor, the fourth through hole may be filled with the resin and exposed. According to the above configuration, the worker can visually check that the resin has been filled into the fourth through hole and is exposed, thereby confirming that a sufficient amount of resin has been filled inside the cluster block. [Effects of the Invention]

[0012] According to this invention, it is possible to prevent air from remaining in the resin filled inside the cluster block. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a cross-sectional view of an electric compressor according to an embodiment. [Figure 2] FIG. 2 is a top view of a cluster block. [Figure 3] FIG. 6 is a cross-sectional view taken along line 3-3 in FIG. 5. [Figure 4] FIG. 2 is an exploded perspective view of a cluster block, a connection terminal, and a lead wire. [Figure 5] FIG. 2 is a side view of the cluster block. [Figure 6] FIG. 2 is a perspective view of a cluster block. [Figure 7] FIG. 2 is an enlarged perspective view of a part of the cluster block. [Figure 8] FIG. [Figure 9] FIG. 2 is a top view of a cluster block. [Figure 10] FIG. 10 is a cross-sectional view illustrating filling of the inside of the cluster block with resin. DETAILED DESCRIPTION OF THE INVENTION

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electric compressor will now be described with reference to the drawings. <Overall configuration of electric compressor> 1, the electric compressor 10 has a housing 11. The housing 11 has 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.

[0015] The motor housing 13 has a plate-shaped end wall 13a and a peripheral wall 13b extending cylindrically 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 opposite the end wall 13a. The inverter case 14 is cylindrical. The inverter case 14 is connected to the end wall 13a of the motor housing 13. The end wall 13a of the motor housing 13 and the inverter case 14 define an accommodation space S1.

[0016] A cylindrical boss 13c is provided in the center of the end wall 13a of the motor housing 13. The axis of the boss 13c coincides with the axis of the peripheral wall 13b of the motor housing 13. A through hole 13h is formed in the end wall 13a of the motor housing 13. The through hole 13h penetrates 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 13c.

[0017] The electric compressor 10 has a rotating shaft 15, a compression unit 16, an electric motor 20, and an inverter 17. The rotating shaft 15, the compression unit 16, and the electric motor 20 are housed in a motor housing 13. The inverter 17 is housed in an accommodation space S1. Thus, the housing 11 houses the compression unit 16, the electric motor 20, and the inverter 17. The direction in which the rotation axis L1 of the rotating shaft 15 extends is referred to as the axial direction X. The axis of the peripheral wall 13b of the motor housing 13 extends in the axial direction X. Directions that are perpendicular to the axial direction X and that are perpendicular to each other are referred to as the first direction Y and the second direction Z.

[0018] The compression section 16 includes a fixed scroll 16a and a movable scroll 16b. The fixed scroll 16a is fixed to the motor housing 13. The movable scroll 16b is disposed opposite the fixed scroll 16a. The compression section 16 is driven by the rotation of the rotary shaft 15. The compression section 16 compresses the refrigerant when driven. A volume-variable compression chamber S2 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 rotary shaft 15.

[0019] The compression unit 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 unit 16. The compression unit 16, the electric motor 20, and the inverter 17 are arranged side by side in this order in the axial direction X.

[0020] The electric compressor 10 includes a shaft support member 18. The shaft support member 18 is disposed between the compression unit 16 and the electric motor 20. Therefore, the shaft support member 18 serves as a partition wall between the electric motor 20 and the compression unit 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. A first end of the rotary 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 rotary shaft 15. The first end of the rotary shaft 15 is rotatably supported by the shaft support member 18 via the radial bearing 19b. A second end of the rotary 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 rotary shaft 15. A second end of the rotary shaft 15 is rotatably supported by the boss portion 13c via a radial bearing 19a.

[0021] 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 fixed to the rotary shaft 15. A plurality of permanent magnets (not shown) are embedded in the rotor core 21a.

[0022] The stator 22 has an annular stator core 23. The rotor 21 is disposed inside the stator core 23. The stator core 23 is fixed to the inner circumferential surface of the peripheral wall 13b of the motor housing 13. Therefore, the stator core 23 is fixed to the inner circumferential surface of the housing 11. The stator 22 is assembled to the housing 11 by fitting the stator core 23 into the inner circumferential surface of the peripheral wall 13b of the motor housing 13 by, for example, shrink fitting.

[0023] The stator core 23 has a first end face 23a and a second end face 23b. The first end face 23a is an end face located on one side in the direction in which the axis of the stator core 23 extends. The second end face 23b is an end face located on the other side in the direction in which the axis of the stator core 23 extends. The stator core 23 is disposed in the motor housing 13 so that the first end face 23a faces the end wall 13a of the motor housing 13. Therefore, the first end face 23a is located closer to the inverter 17 than the second end face 23b. The second end face 23b is located closer to the compression section 16 than the first end face 23a.

[0024] A plurality of coils 28U, 28V, and 28W for the U, V, and W phases are wound around the stator core 23. That is, the coils 28U, 28V, and 28W are wound around the stator 22. First coil ends 28a, which are part of the coils 28U, 28V, and 28W for each phase, protrude from a first end surface 23a of the stator core 23. Second coil ends 28b, which are part of the coils 28U, 28V, and 28W for each phase, protrude from a second end surface 23b of the stator core 23.

[0025] The stator 22 includes a connector 44. The connector 44 is housed within the 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 face 23a of the stator core 23 and the end wall 13a of the motor housing 13.

[0026] <Airtight terminal> As shown in FIGS. 1 and 2, the electric compressor 10 has a hermetic terminal 40. The hermetic terminal 40 is accommodated in the housing 11. The hermetic 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 in the accommodation space S1. This electrically connects the hermetic terminal 40 to the inverter 17. A second end of each conductive member 41 protrudes from the accommodation space S1 into the motor housing 13 through a through hole 13h.

[0027] 1, the airtight terminal 40 has a support plate 42. The support plate 42 supports three conductive members 41 in a mutually insulated state. The support plate 42 is fixed within the accommodation space S1 around the through hole 13h on the outer surface of the end wall 13a.

[0028] <Leader> As shown in FIGS. 1 and 2 , the connector 44 includes lead wires 43. In other words, the stator 22 includes the lead wires 43. The lead wires 43 are led out from the coils 28U, 28V, and 28W wound around the stator 22. The lead wires 43 are led out from the first coil ends 28a of the coils 28U, 28V, and 28W of each phase. One lead wire 43 is led out from the electric motor 20, corresponding to each phase. Therefore, three lead wires 43 are led out from the electric motor 20. A portion of the lead wires 43 of each phase is covered by a cylindrical insulating tube member 30. The other portions of the lead wires 43 of each phase are exposed from the tube member 30.

[0029] <Connection terminal> As shown in FIG. 1, the connector 44 includes connection terminals 45. In other words, the stator 22 includes the connection terminals 45. The connection terminals 45 are provided on the lead wires 43. One connection terminal 45 is provided on the lead wires 43 of each phase. Therefore, the stator 22 has three connection terminals 45. Note that FIG. 1 shows only one connection terminal 45. The three connection terminals 45 correspond to the coils 28U, 28V, and 28W of each phase.

[0030] The connection terminal 45 is electrically connected to the airtight terminal 40. As a result, the airtight terminal 40 electrically connects the inverter 17 and the electric motor 20. Power from the inverter 17 is supplied to the electric motor 20 via the conductive members 41, the connection terminals 45, and the lead wires 43. This drives the electric motor 20. Therefore, the inverter 17 drives the electric motor 20. As the electric motor 20 is driven, the compression unit 16 is driven, and the compression unit 16 compresses the refrigerant.

[0031] As shown in FIG. 3 , each connection terminal 45 has a first connection portion 45a located at one end of the connection terminal 45 in the first direction Y and a second connection portion 45b located at the other end of the connection terminal 45 in the first direction Y. The first connection portion 45a is cylindrical. The connection terminal 45 and the airtight terminal 40 are electrically connected to each other by inserting the conductive member 41 into the first connection portion 45a. The second connection portion 45b extends from the first connection portion 45a in the first direction Y. An end of the lead wire 43 is connected to the second connection portion 45b. As a result, the connection terminal 45 electrically connects the airtight terminal 40 and the lead wire 43.

[0032] <Cluster Block> The connector 44 includes a cluster block 46. In other words, the stator 22 includes the cluster block 46. The cluster block 46 houses the connection terminals 45. The three connection terminals 45 are fixed inside the cluster block 46.

[0033] The cluster block 46 includes a case member 61 and a cover member 71. The case member 61 and the cover member 71 are insulating members. <Case parts> The case member 61 has a first case portion 62 and a second case portion 63. The first case portion 62 is cylindrical and extends in the first direction Y. The second case portion 63 closes one of the openings at both ends of the first case portion 62 in the first direction Y. The case member 61 has a first through hole 47, a second through hole 48, and a third through hole 49.

[0034] 4, the first case portion 62 has 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 are flat. The longitudinal direction of the pair of first case walls 62a and the longitudinal direction 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.

[0035] 2 and 3, three first through holes 47 are formed in the first case portion 62. The three first through holes 47 are located at positions offset 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.

[0036] The case member 61 has three first cylindrical portions 62c. Each first cylindrical portion 62c is cylindrical and extends 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 interior of each first cylindrical portion 62c communicates with the three first through-holes 47.

[0037] 3, the hermetic terminal 40 is inserted into the first through-hole 47 toward the connection terminal 45. In detail, an end of the conductive member 41 of the hermetic terminal 40 is inserted into the first through-hole 47 via the inside of the first cylindrical portion 62c. The end of the conductive member 41 inserted into the first through-hole 47 is inserted into the inside of the first connection portion 45a in 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.

[0038] A cylindrical sealing member 41a is inserted into each first cylindrical portion 62c. The outer peripheral surface of the sealing member 41a contacts the inner peripheral surface of the first cylindrical portion 62c. The inner peripheral surface of the sealing member 41a contacts the outer peripheral surface of the conductive member 41 inside the first cylindrical portion 62c. Therefore, the inside of the first cylindrical portion 62c is blocked by the conductive member 41 and the sealing member 41a, and communication between the inside and outside of the cluster block 46 via the first cylindrical portion 62c and the first through-hole 47 is blocked. This prevents refrigerant from entering the inside of the cluster block 46 via the first through-hole 47.

[0039] The second through holes 48 are formed in the first case portion 62 on the opposite side to the second case portion 63 in the first direction Y. The lead wires 43 are inserted through the second through holes 48. The portions of the lead wires 43 of each phase that are covered by the tube members 30 extend between the inside and outside of the cluster block 46 via the second through holes 48.

[0040] 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.

[0041] The first case portion 62 has three protrusions 66. The three protrusions 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 protrusions 66 are spaced apart from one another in the second direction Z. Each protrusion 66 is located inside the second through-hole 48.

[0042] 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 that follows the outer peripheral surface of the tube member 30. The groove 64 is formed in the convex portion 66 so as to extend in the first direction Y.

[0043] 3 and 4, the third through hole 49 is formed in the first case portion 62. The third through hole 49 is located in the first case portion 62, offset to the opposite side of the first through hole 47 in the first direction Y. The third through hole 49 penetrates through one of the pair of first case walls 62a in which the first through hole 47 is not formed.

[0044] The case member 61 has a second cylindrical portion 62d. The second cylindrical portion 62d is cylindrical and extends from the outer surface of the first case portion 62. The second cylindrical portion 62d surrounds the third through hole 49. The interior of the second cylindrical portion 62d is in communication with the third through hole 49.

[0045] As shown in Figures 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 with resin R. Inside the cluster block 46, the resin R covers the lead wires 43. The third through hole 49 exposes the resin R covering the lead wires 43. 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.

[0046] 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 one of both end portions of the second case wall 62b in the first direction Y, the end portion defining the second through-hole 48.

[0047] <Cover parts> As shown in FIG. 8, the cover member 71 has three mounting portions 72. When viewed from the axial direction X, each mounting portion 72 has a generally rectangular shape with its longitudinal axis extending in the first direction Y. Each mounting portion 72 has a first mounting portion 73 and a second mounting portion 74. The first mounting portion 73 and the second mounting portion 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 portion 73 is a through-hole that penetrates the first mounting portion 73 in the axial direction X.

[0048] 3, one connection terminal 45 and a lead wire 43 connected to the connection terminal 45 are placed on each mounting portion 72. With the connection terminal 45 and the lead wire 43 placed on the mounting portion 72, the cover member 71 is inserted into the inside of the case member 61 through the second through hole 48. Therefore, the second through hole 48 is set to a size that allows the insertion of the three mounting portions 72 with the connection terminals 45 and lead wires 43 placed thereon. Each mounting portion 72 is located inside the case member 61.

[0049] A connection terminal 45 is placed on a first mounting portion 73 of each mounting portion 72. A lead wire 43 covered with a tube member 30 is placed on a second mounting portion 74 of each mounting portion 72. The insertion hole 75 of each mounting portion 72 faces the first through hole 47 of the case member 61 and the interior 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 interior of the connection terminal 45 via the insertion hole 75 of each mounting portion 72.

[0050] As shown in FIG. 8 , the cover member 71 has a pair of walls 80. 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 cover member 71 has the first wall 82 and the 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 is in the shape of a plate that is thick in the first direction Y. The first wall 82 has an outer peripheral surface 82a that extends along the outer edge of the first wall 82. The second wall 81 has an outer peripheral surface 81a that extends along the outer edge of the second wall 81.

[0051] 5, the second wall 81 is inserted into the first case portion 62 together with the first wall 82 through the second through hole 48. Therefore, the pair of walls 80 are inserted through the second through hole 48.

[0052] 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 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 face of the second wall 81 in the first direction Y is flush with the end face of the first case portion 62 in the first direction Y that surrounds the second through hole 48. The other end face of the second wall 81 in the first direction Y is located inside the first case portion 62.

[0053] 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 recessed in the axial direction X from the outer circumferential surface 81a of the second wall 81. The three first grooves 83 are spaced apart from one another in the second direction Z. Each first groove 83 penetrates the second wall 81 in the thickness direction of the second wall 81. Each 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 that follows the outer circumferential 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.

[0054] As shown in FIG. 5 , the first groove 83 of the cover member 71, together with the groove 64 of the case member 61, defines a lead wire insertion hole 90. The lead wire insertion hole 90 has a circular shape when viewed from the first direction Y. A lead wire 43 covered by a tube member 30 is inserted through the lead wire insertion hole 90. The diameter of the lead 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 form the lead 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 cover member 71 supports the lead wire 43. The lead wire 43 covered by the tube member 30 is supported by the case member 61 and the cover member 71 through the lead wire insertion hole 90.

[0055] As shown in FIG. 8 , the first walls 82 are located at the ends of each mounting portion 72 in the first direction Y. That is, the cover 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 recessed in the axial direction X from the outer circumferential 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 that follows the outer circumferential 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.

[0056] Each second groove 84 faces the first groove 83 in the first direction Y. The lead wire 43 covered by the tube member 30 is placed in the first groove 83 and the second groove 84. As a result, the second groove 84 supports the lead 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 lead wire 43.

[0057] 3, when the cover member 71 is inserted into the case member 61 through the second through-hole 48, the outer peripheral surface 82a of the first wall 82 and the outer peripheral surface 81a of the second wall 81 come into contact with the inner surface of the first case portion 62. Of the lead wires 43 covered by the tube member 30, the portion located between the first groove 83 and the groove 64 is pressed against the first case portion 62 by the second wall 81. Of the lead wires 43 covered by the tube member 30, the portion 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 and formed between the first wall 82 and the second wall 81 in the first direction Y within the case member 61.

[0058] 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 toward the gap 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. 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 is filled between the first wall 82 and the second wall 81. Within the interior of the cluster block 46, the gap between the second through hole 48 and the connection terminal 45 in the first direction Y is sealed with the resin R. This suppresses the infiltration of refrigerant from the second through hole 48 toward the connection terminal 45 inside the cluster block 46.

[0059] 4 and 7, the second wall 81 is formed with engaging protrusions 85. The engaging protrusions 85 are located at both ends of the second wall 81 in the second direction Z and protrude from the outer peripheral surface 81a of the second wall 81. When the cover member 71 is inserted into the case member 61 through the second through-hole 48, the engaging protrusions 85 are inserted into each of the two engaging holes 65 of the first case portion 62, and thereby the engaging protrusions 85 are engaged with the engaging holes 65. In this way, the cover member 71 is fixed to the case member 61.

[0060] As shown in FIG. 8 , the cover member 71 has an extension portion 86 connecting the first wall 82 and the second wall 81. The extension portion 86 extends in the first direction Y between the first wall 82 and the second wall 81. In this embodiment, the extension portion 86 extends from 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. Therefore, the cover member 71 has two extension portions 86. The two extension portions 86 are spaced apart from each other in the second direction Z. Each extension portion 86 is flat and extends perpendicular to the axial direction X.

[0061] <Fourth through hole> 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 fourth through hole 50 is located in a position in the first case portion 62 that is offset to the opposite side from the first through hole 47 in the first direction Y.

[0062] The fourth through holes 50 have a smaller opening area than the third through holes 49. Each fourth through hole 50 penetrates the first case wall 62a of the pair of first case walls 62a in which the first through holes 47 are formed. The first case wall 62a in which the fourth through holes 50 are formed is different from the first case wall 62a in which the third through holes 49 are formed. That is, the fourth through holes 50 are provided on the side of the case member 61 opposite the third through holes 49 in the axial direction X. The fourth through holes 50 face the third through holes 49 in the axial direction X. In this embodiment, all of the fourth through holes 50 in the case member 61 face the third through holes 49 in the axial direction X.

[0063] 3, 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 lead wire 43 sandwiched therebetween. The opening of the fourth through hole 50 shown in FIG. 3 sandwiches both the extension portion 86 and the lead wire 43 between itself and the opening of the third through hole 49.

[0064] The fourth through hole 50 is located away from the lead wire 43 in the axial direction X. The lead wire 43 extends near the opening of the third through hole 49 into the case member 61. Therefore, the fourth through hole 50 is located farther away from the lead wire 43 in the axial direction X than the third through hole 49. In other words, the first wall 82 and the second wall 81 support the lead wire 43 so that it is closer to the third through hole 49 than to the fourth through hole 50.

[0065] The fourth through hole 50 opens toward the gap between the first wall 82 and the second wall 81. The filling space 91 communicates with the fourth through hole 50. The resin R filled into the filling space 91 from the third through hole 49 reaches the inside of the fourth through hole 50. As a result, the resin R is filled and exposed in each fourth through hole 50. 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 manner is referred to as an exposed portion R1. The exposed portion R1 is visible from outside the cluster block 46. The exposed portion R1 may be exposed from some or all of the multiple fourth through holes 50.

[0066] <Resin filling method> When filling the interior of the cluster block 46 with the resin R, the cover member 71 is inserted into the interior of the case member 61 through the second through-hole 48, with the connection terminals 45 and the lead wires 43 covered with the tube members 30 placed on the placement portion 72. As a result, a filling space 91 is formed between the pair of walls 80 at a position inside the cluster block 46 that communicates with the third through-hole 49 and the fourth through-hole 50.

[0067] 10, the resin R is filled using the nozzle 92. When the resin R is filled, the orientation of the case member 61 is maintained so that the third through-hole 49 faces upward in the direction of gravity. With the tip of the nozzle 92 inserted inside the second cylindrical portion 62d, the resin R is filled from the nozzle 92 through the third through-hole 49 into the filling space 91. The resin R may be filled through multiple locations of the third through-hole 49 while changing the position of the nozzle 92.

[0068] 3 and 10, the resin R filled through the third through-hole 49 spreads into the filling space 91 due to its own weight. The resin R flows around the tube members 30 that are close to the third through-hole 49. As a result, the lead wires 43 covered by the tube members 30 are fixed to the cluster block 46 via the resin R. The resin R flows between the tube members 30 downward in the direction of gravity relative to the tube members 30.

[0069] The flow of resin R from filling space 91 toward second through hole 48 is blocked by second wall 81. The flow of resin R from filling space 91 toward connection terminal 45 is blocked by first wall 82. Therefore, the pair of walls 80 block the resin R filled from third through hole 49 between second through hole 48 and connection terminal 45. Resin R flows around extension portions 86 while spreading into filling space 91. Through the gaps between extension portions 86, resin R flows into a portion of filling space 91 that is located lower than extension portions 86 in the direction of gravity.

[0070] When the resin R is filled into the filling space 91, air may accumulate in areas where the resin R is difficult to flow. Because the fourth through hole 50 is in communication with the filling space 91, the air that has accumulated in the filling space 91 can be discharged to the outside of the cluster block 46 through the fourth through hole 50. In other words, the fourth through hole 50 is used to release air that has accumulated between the first wall 82 and the second wall 81.

[0071] In particular, air tends to accumulate at a position distant from the third through hole 49 filled with the resin R. The fourth through hole 50 is formed in the first case wall 62a, which faces in the axial direction X relative to the first case wall 62a in which the third through hole 49 is formed. The fourth through hole 50 opens into the interior of the cluster block 46 at a position distant from the third through hole 49, which is a portion of the filling space 91 where air tends to accumulate. Therefore, air that has accumulated between the first wall 82 and the second wall 81 tends to escape to the outside of the cluster block 46 through the fourth through hole 50.

[0072] The resin R flows from the filling space 91 into the inside of the fourth through hole 50. A part 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 filling of the inside of the cluster block 46 with the resin R is completed, the filled resin R is thermally cured.

[0073] [Action and effect] According to the above embodiment, the following actions and effects can be obtained. (1) The case member 61 has a fourth through hole 50 that opens toward the gap between the first wall 82 and the second wall 81. Resin R is filled between the first wall 82 and the second wall 81. Therefore, when the resin R is filled into the inside of the cluster block 46 through the third through hole 49, even if air accumulates in the resin R filled between the first wall 82 and the second wall 81, the air can be discharged 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.

[0074] (2) The cover member 71 has an extension portion 86 that connects the first wall 82 and the second wall 81. The opening of the fourth through hole 50 is located on the opposite side from the opening of the third through hole 49, with at least one of the extension portion 86 and the lead wire 43 sandwiched therebetween. Air is likely to remain in the portions overlapping with the extension portion 86 and the lead wire 43 when the resin R is filled into the interior of the cluster block 46 through the third through hole 49, but this air can be discharged to the outside of the cluster block 46 through the fourth through hole 50. This further reduces the amount of air remaining in the resin R filled into the interior of the cluster block 46.

[0075] (3) The first wall 82 and the second wall 81 support the lead wire 43 so that it is closer to the third through hole 49 than to the fourth through hole 50. Compared to when the lead wire 43 is located closer to the fourth through hole 50 than to the third through hole 49, the position of the lead wire 43 is closer to the third through hole 49. Therefore, when the resin R is filled into the inside of the cluster block 46 from the third through hole 49, the resin R is more likely to spread around the lead wire 43. Therefore, it is possible to prevent air from remaining around the lead wire 43, which further prevents air from remaining in the resin R filled inside the cluster block 46.

[0076] (4) The fourth through-hole 50 is filled with and exposed to the resin R. Therefore, by visually checking that the fourth through-hole 50 is filled with the resin R, the worker can confirm that a sufficient amount of the resin R has been filled inside the cluster block 46.

[0077] (5) The case member 61 has the 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 through the third through-hole 49, the resin R can be blocked by the second cylindrical portion 62d. Therefore, the efficiency of filling the resin R into the inside of the cluster block 46 can be improved.

[0078] (6) Engagement holes 65 are formed in the case member 61. The lid member 71 has engagement protrusions 85. When the lid member 71 is inserted into the inside of the case member 61 through the second through-hole 48, the engagement protrusions 85 are inserted into the engagement holes 65, and thereby the engagement protrusions 85 are engaged with the engagement holes 65. This fixes the lid member 71 to the case member 61, thereby preventing the lid member 71 from coming off the case member 61.

[0079] [Example of change] The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other within the scope of technical compatibility.

[0080] The number of connection terminals 45 and lead wires 43 may be changed as appropriate depending on the number of phases of the coils 28U, 28V, and 28W. In accordance with the change in the number of connection terminals 45 and lead wires 43, the number of mounting portions 72 on the lid member 71 may be changed.

[0081] The shapes and numbers of the engaging holes 65 and the engaging protrusions 85 may be changed as appropriate. The engaging holes 65 may be omitted from the case member 61. The engaging protrusions 85 may be omitted from the cover member 71. The second cylindrical portion 62d may be omitted from the case member 61.

[0082] 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 blocked by inserting the sealing member 41a into the first through-hole 47 together with the conductive member 41.

[0083] The fourth through-holes 50 do not have to be filled with the resin R. The first wall 82 and the second wall 81 may support the lead wire 43 so that the lead wire 43 is 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 lead wire 43 so that the distance from the lead wire 43 to the third through hole 49 is the same as the distance from the lead wire 43 to the fourth through hole 50.

[0084] Both the extension portion 86 and the lead wire 43 do not have to 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 extensions 86 formed on the cover member 71 may be changed as appropriate. The extensions 86 may be omitted from the cover member 71.

[0085] 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 a position in the case member 61 that is shifted from a position facing the third through hole 49 in the axial direction X. In other words, the fourth through hole 50 may be formed in any position in the case member 61 that allows it to open toward the gap between the first wall 82 and the second wall 81. In this case, the fourth through hole 50 can also be used to release air that has accumulated between the first wall 82 and the second wall 81.

[0086] The compression section 16 is not limited to a type including a fixed scroll 16a and a movable scroll 16b, and may be, for example, a piston type or a vane type. [Explanation of symbols]

[0087] R...resin, 10...electric compressor, 11...housing, 16...compression section, 17...inverter, 20...electric motor, 21...rotor, 22...stator, 28U, 28V, 28W...coil, 40...airtight terminal, 43...lead 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...cover member, 81...second wall, 82...first wall, 86...extension section.

Claims

1. a compression section that compresses a refrigerant; an electric motor having a stator and a rotor and driving the compression unit; an inverter that drives the electric motor; a housing that accommodates the compression unit, the electric motor, and the inverter; a sealed terminal that electrically connects the inverter and the electric motor, The stator includes: a lead wire drawn from the coil wound around the stator; a connection terminal provided on the lead wire and electrically connected to the airtight terminal; a cluster block that houses the connection terminals; The cluster block comprises: a case member having a first through hole through 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 through which a resin covering the lead wire is exposed; a cover member including a first wall that supports the lead 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 the electric compressor, the third through hole opens toward a gap between the first wall and the second wall, the case member has a fourth through hole having an opening area smaller than that of the third through hole and opening toward a gap between the first wall and the second wall, the resin is filled between the first wall and the second wall, the cover member has an extension portion connecting the first wall and the second wall, an opening of the fourth through hole is provided on the opposite side to the opening of the third through hole, with at least one of the extension portion and the lead wire sandwiched therebetween; The fourth through hole is filled with the resin.

2. The electric compressor according to claim 1 , wherein the first wall and the second wall support the lead wire so that the lead wire is closer to the third through hole than to the fourth through hole.

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