Electric compressor

Abstract

The invention provides an electric compressor. The purpose of the present invention is to reduce the size of an electric compressor in the axial direction of a rotating shaft, and to cool a coil while ensuring insulation between each phase lead wire and a coil end. The refrigerant sucked into the motor chamber flows toward the second coil end (33) through the through holes (92), so that the U-phase coil (28U), the V-phase coil (28V) and the W-phase coil (28W) are efficiently cooled by the refrigerant. On the cover end surface (71), the first surface (81) is disposed at a position farther from the second coil end (33) than the second surface (82). The insulation distance between the extension part (78) disposed on the first surface (81) and the second coil end (33) via the through hole (92) is increased. The size of the electric compressor in the axial direction of the rotating shaft (15) is reduced by effectively utilizing the space generated when the second surface (82) is closer to the second coil end (33) than the first surface (81).

Description

Technical Field

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

[0002] The electric compressor includes a rotating shaft, a compression unit, a motor, and a housing. The compression unit compresses the fluid by the rotation of the rotating shaft. The motor rotates the rotating shaft. The housing has a motor chamber. The motor chamber accommodates the motor. The fluid is sucked into the motor chamber.

[0003] The motor has a stator. The stator has a stator core, a multi-phase coil and an insulator. The stator core is fixed to a housing. The coils of each phase are formed by winding the multi-phase windings on the stator core in a concentrated winding manner. The insulator is arranged relative to the core end face of the stator core located in the axial direction of the rotating shaft. The insulator insulates the coil from the core end face.

[0004] The motor has a coil end, a lead wire, and a neutral point connection portion. The coil end is a part of each phase coil and protrudes from the core end surface. The lead wire is a part of each phase winding and is led out from each phase coil end. In the neutral point connection portion, the ends of the lead wires of each phase are electrically connected to each other to form a neutral point.

[0005] The neutral point connection part may be fixed to the coil end by being tied with a fixing wire, for example. However, in this case, a process of tying the neutral point connection part to the coil end with the fixing wire is required. Therefore, the operation process is complicated and undesirable.

[0006] Therefore, there is known an electric compressor including a housing member for housing a neutral point connector, such as Patent Document 1. This eliminates the need for a process of tying the neutral point connector to the coil end using a fixing wire, thereby simplifying the operation process.

[0007] Prior art literature

[0008] Patent Literature

[0009] Patent Document 1: Japanese Patent Application Publication No. 2020-129944 Summary of the invention

[0010] Problems to be solved by the invention

[0011] In such an electric compressor, there is a case where the stator has an insulating cover member that is arranged on the side opposite to the core end face in the axial direction of the rotating shaft relative to the coil end. The cover member has a cover end face that is located on the side opposite to the coil end in the axial direction of the rotating shaft. An insulating storage portion for storing a neutral point connection portion is provided on the cover end face. Accordingly, compared with a case where the storage portion for storing the neutral point connection portion is provided on, for example, the outer peripheral side of an insulating member, the electric compressor can be miniaturized in the radial direction of the rotating shaft.

[0012] The winding has a conductor and a coating applied to the outer circumference of the conductor. In order to ensure insulation, the outer circumference of the coating of each phase lead wire is covered by a tubular resin insulating member, for example. Therefore, each phase lead wire has a coating portion in which the outer circumference of the coating is covered by the insulating member.

[0013] In addition, in the case where the neutral point connection portion is accommodated in an insulating storage portion as described above, in order to ensure the insulation of the neutral point connection portion, it can be considered to seal the inside of the storage portion with resin, for example, by allowing the resin to flow into the storage portion and solidify. In this case, if, for example, the portion of each phase lead wire located in the storage portion is covered with an insulating component, the resin flowing into the storage portion may sometimes be difficult to adhere tightly to the insulating component, so it may be difficult to seal the inside of the storage portion with the resin. Therefore, in each phase lead wire, an insulating component is not arranged in the portion that includes the neutral point connection portion and is at least located in the storage portion. Furthermore, considering the error in the design size of the storage portion, etc., with respect to each phase lead wire, it can be considered that an insulating component is not arranged in the portion that extends from the storage portion to the outside of the storage portion by a predetermined length. As described above, there is a case where each phase lead wire has a non-covered portion, where no insulating component is arranged, includes a neutral point connection portion, and has a portion that is continuous with the neutral point connection portion and extends from the storage portion to the outside of the storage portion by a predetermined length, that is, an extension portion. Accordingly, even if there is an error in the design size of the storage portion, the portion of the phase lead wire located in the storage portion can be reliably inserted as a non-covered portion where no insulating component is arranged. Therefore, the storage portion can be reliably sealed with resin.

[0014] Since the coil generates heat, it is desirable to utilize the fluid in the motor chamber for cooling. However, in the case where the cover component is arranged on the side opposite to the end face of the stator core in the axial direction of the rotating shaft relative to the coil end, the flow of the fluid sucked into the motor chamber toward the coil end may be hindered by the cover component. Therefore, it is conceivable to form a through hole in the end face of the cover, for example. Accordingly, the fluid sucked into the motor chamber flows toward the coil end via the through hole, so the coil can be efficiently cooled by the fluid.

[0015] However, in the cover end surface, there is a case where a through hole is formed at least on the first surface of the extension portion where the storage portion and the lead wires of each phase are arranged. In this case, since no insulating component is arranged in the extension portion of the lead wires of each phase, the extension portion and the coil end may become poorly insulated through the through hole. Therefore, in order to ensure the insulation distance between the extension portion and the coil end through the through hole, it is necessary to make the cover end surface as far away from the coil end as possible. However, corresponding to the amount by which the cover end surface is separated from the coil end, the size (body) of the electric compressor in the axial direction of the rotating shaft may be enlarged. Therefore, an electric compressor is desired that can ensure the insulation between the lead wires of each phase and the coil end and cool the coil while seeking to miniaturize the electric compressor in the axial direction of the rotating shaft.

[0016] Technical means to solve problems

[0017] An electric compressor for solving the above-mentioned problems comprises: a rotating shaft; a compression part, which compresses a fluid by rotating the rotating shaft; a motor, which rotates the rotating shaft; and a housing, which has a motor chamber for accommodating the motor and into which the fluid is sucked, the motor having a stator, the stator having: a stator core fixed to the housing; a multi-phase coil, which is formed by winding a multi-phase winding around the stator core in a concentrated winding manner; an insulating member, which is arranged relative to the core end face of the stator core located in the axial direction of the rotating shaft and insulates the coil from the core end face; a coil end, which is a part of the coil of each phase and protrudes from the core end face; a lead wire, which is a part of the winding of each phase and is led out from the coil end of each phase; a neutral point connecting part, which is a connecting part that forms a neutral point by electrically connecting the end parts of the lead wires of each phase to each other; and an insulating cover member, which is arranged relative to the coil end in the axial direction. On the side opposite to the core end face, the winding has a conductor and a coating applied to the outer peripheral side of the conductor, the cover component has a cover end face located on the side opposite to the coil end in the axial direction, and an insulating storage portion for storing the neutral point connection portion is provided on the cover end face, and each phase lead wire has: a coated portion, which is a portion on the outer peripheral side of the coating covered by an insulating component; and a non-coated portion, in which the insulating component is not arranged, including the neutral point connection portion, and having an extension portion which is continuous with the neutral point connection portion and extends from the storage portion to the outside of the storage portion by a predetermined length, the cover end face has: a first face, on which the storage portion and the extension portion are arranged; and a second face, which is a face different from the first face, at least on the first face, a through hole is formed for allowing the fluid sucked into the motor chamber to flow toward the coil end, wherein the first face is arranged at a position farther away from the coil end than the second face.

[0018] Accordingly, the fluid sucked into the motor chamber flows toward the coil end via the through hole, so the coil can be efficiently cooled by the fluid. In addition, on the cover end surface, the first surface is arranged at a position farther from the coil end than the second surface, so the insulation distance between the extension portion arranged on the first surface and the coil end via the through hole can be extended. Therefore, it is possible to suppress the situation where the extension portion and the coil end become poorly insulated via the through hole. In addition, by effectively utilizing the space generated by the fact that the second surface is closer to the coil end than the first surface, the miniaturization of the electric compressor in the axial direction of the rotating shaft can be sought. Based on the above, while seeking the miniaturization of the electric compressor in the axial direction of the rotating shaft, the insulation of the lead wires of each phase and the coil end can be ensured, and the coil can be cooled. Here, the winding and the lead wire as a part thereof are components to which an enamel coating is applied, for example, on the outer peripheral side of the conductor, and the insulating component is a component that covers the lead wire closer to the outer peripheral side.

[0019] In the above-mentioned electric compressor, it can be: equipped with: a converter, driving the motor; and a conductive component, electrically connected to the converter, the stator has: leads, led out from the ends of the coils of each phase; and an insulating cluster block (cluster block), which internally accommodates connection terminals that electrically connect the conductive component to the leads, and the cluster block is arranged relative to the cover component at a position that does not overlap with the storage portion in the axial direction.

[0020] This allows the cluster block to be arranged as close to the coil end as possible, compared to a case where the cluster block is arranged at a position overlapping the housing portion in the axial direction of the rotating shaft relative to the cover member. Therefore, the electric compressor can be further miniaturized in the axial direction of the rotating shaft.

[0021] In the above electric compressor, the cover member may include an insulating wall portion that covers the extending portion from the radially outer side of the rotating shaft.

[0022] According to this, the insulation wall can be used to ensure insulation between the extension portion and the housing, for example. Therefore, by providing the cover member with the insulation wall, the insulation of the lead wires of each phase can be further ensured.

[0023] In the electric compressor, the first surface and the second surface may be flat surfaces extending parallel to each other, the cover end surface may have a connecting surface connecting the first surface and the second surface, and the connecting surface may extend obliquely relative to the first surface and the second surface.

[0024] According to this, the connection surface extends obliquely relative to the first surface and the second surface, so that the lead wires of each phase can be extended without extreme bending at the portion extending between the first surface and the second surface. Therefore, the load applied to the lead wires of each phase can be suppressed, so the durability of the lead wires of each phase can be improved.

[0025] In the above electric compressor, the cover member may include a restriction portion that restricts movement of the covering portion in a direction away from the second surface.

[0026] According to this, the limiting portion can be used to make each phase covering portion arranged on the second surface as close to the second surface as possible. Thus, each phase covering portion arranged on the second surface can be arranged as close to the coil end as possible. Therefore, the electric compressor in the axial direction of the rotating shaft can be further miniaturized.

[0027] Effects of the Invention

[0028] According to the present invention, it is possible to reduce the size of the electric compressor in the axial direction of the rotating shaft, ensure insulation between the lead wires of each phase and the coil ends, and cool the coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a cross-sectional view showing the electric compressor in the embodiment.

[0030] Figure 2 This is a cross-sectional view of the motor.

[0031] Figure 3 It is an exploded perspective view showing a stator core and two insulating members.

[0032] Figure 4 It is a perspective view of the stator showing a state before the cover is attached to the insulator.

[0033] Figure 5 is a perspective view of the stator showing a state in which the cover is mounted to the insulator.

[0034] Figure 6 It is a three-dimensional diagram of the stator.

[0035] Figure 7 This is a perspective view showing a part of the stator in an enlarged manner.

[0036] Figure 8 It is a cross-sectional view showing the storage portion and its interior. DETAILED DESCRIPTION

[0037] Below, according to Figures 1 to 8 An embodiment in which an electric compressor is embodied will be described. The electric compressor of this embodiment is used in, for example, a vehicle air conditioner.

[0038] <Basic structure of electric compressor>

[0039] like Figure 1As shown, the electric compressor 10 includes a cylindrical housing 11. 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 materials. The discharge housing 12, the motor housing 13, and the inverter case 14 are made of, for example, aluminum.

[0040] The motor housing 13 has an end wall 13a and a peripheral wall 13b. The end wall 13a is plate-shaped. The peripheral wall 13b extends in a cylindrical shape from the outer periphery of the end wall 13a. The exhaust housing 12 is cylindrical. The exhaust housing 12 is connected to the end of the peripheral wall 13b of the motor housing 13 on the side opposite to the end wall 13a. The converter housing 14 is cylindrical. The converter housing 14 is connected to the end wall 13a of the motor housing 13. In addition, the converter chamber S1 is divided by the end wall 13a of the motor housing 13 and the converter housing 14.

[0041] The motor housing 13 has a boss portion 13c. The boss portion 13c is cylindrical. The boss portion 13c protrudes from the center of the end surface of the end wall 13a of the motor housing 13 on the side of the peripheral wall 13b. The axis of the boss portion 13c coincides with the axis of the peripheral wall 13b of the motor housing 13. In addition, a hole 13h is formed in the end wall 13a of the motor housing 13. The hole 13h penetrates the end wall 13a of the motor housing 13 in the thickness direction. The hole 13h is located closer to the peripheral wall 13b than the boss portion 13c.

[0042] The motor housing 13 has a suction port 13d. The suction port 13d is formed at a portion of the peripheral wall 13b of the motor housing 13 close to the end wall 13a. The suction port 13d allows the inside and outside of the motor housing 13 to communicate. A refrigerant as a fluid is sucked into the suction port 13d from the outside.

[0043] The electric compressor 10 includes a rotating shaft 15, a compression unit 16, an inverter 17, and a motor 20. The rotating shaft 15, the compression unit 16, and the motor 20 are housed in a motor housing 13. Therefore, the housing 11 houses the motor 20. The rotating shaft 15 is arranged in the motor housing 13 in a state where the axis of the rotating shaft 15 coincides with the axis of the peripheral wall 13b of the motor housing 13. The inverter 17 is housed in the inverter chamber S1.

[0044] The compression unit 16 and the motor 20 are arranged in the axial direction of the rotating shaft 15. The 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 motor 20 and the inverter 17 are arranged in this order in the axial direction of the rotating shaft 15.

[0045] The electric compressor 10 includes a shaft support member 18. The shaft support member 18 is disposed between the compression section 16 and the motor 20. Therefore, the shaft support member 18 serves as a partition wall between the motor 20 and the compression section 16. Furthermore, the motor chamber S2 is partitioned by the shaft support member 18 and the end wall 13a and the peripheral wall 13b of the motor housing 13. Therefore, the housing 11 includes the motor chamber S2. The motor chamber S2 accommodates the motor 20. The refrigerant is sucked into the motor chamber S2 from the suction port 13d.

[0046] The shaft support member 18 has an insertion hole 18h. The insertion hole 18h is formed in the central portion of the shaft support member 18. The axis of the insertion hole 18h coincides with the axis of the boss portion 13c. The first end of the rotating shaft 15 is inserted into the insertion hole 18h. A radial bearing 19a is provided between the insertion hole 18h and the first end of the rotating shaft 15. The first end of the rotating shaft 15 is rotatably supported on the shaft support member 18 via the radial bearing 19a. In addition, the second end of the rotating shaft 15 is inserted into the inner side of the boss portion 13c. A radial bearing 19b 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 on the boss portion 13c via the radial bearing 19b.

[0047] The compression section 16 includes a fixed scroll 16a and a revolving scroll 16b. The fixed scroll 16a is fixed to the motor housing 13. The revolving scroll 16b is arranged relative 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. A compression chamber S3 with a changeable volume is defined between the fixed scroll 16a and the revolving scroll 16b. A discharge chamber S4 is defined between the fixed scroll 16a and the discharge housing 12. And, the refrigerant compressed by the change in volume of the compression chamber S3 is discharged to the discharge chamber S4. The motor 20 rotates the rotating shaft 15. And, the compression section 16 is driven by the rotation of the rotating shaft 15. The compression section 16 compresses the refrigerant by the rotation of the rotating shaft 15.

[0048] <Basic structure of the motor>

[0049] The motor 20 includes a rotor 21 and a stator 22. The stator 22 is cylindrical. The rotor 21 is arranged inside the stator 22. The rotor 21 includes a cylindrical rotor core 21a and a plurality of permanent magnets (not shown) embedded in the rotor core 21a. The rotor core 21a is fixed to the rotating shaft 15. The rotor core 21a is configured to be rotatable integrally with the rotating shaft 15.

[0050] The stator 22 includes a 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, the stator core 23 is fixed to the housing 11. The stator 22 is assembled to the housing 11 by, for example, embedding the stator core 23 into the inner peripheral surface of the peripheral wall 13b of the motor housing 13 by shrink fitting. The axis of the stator core 23 coincides with the axis of the rotating shaft 15. Therefore, the axial direction of the stator core 23 coincides with the axial direction of the rotating shaft 15.

[0051] like Figure 2 and Figure 3 As shown, the stator core 23 includes a yoke 24 and a plurality of teeth 25. The yoke 24 is cylindrical. The stator core 23 is fixed to the motor housing 13 by fitting the outer peripheral surface of the yoke 24 into the inner peripheral surface of the peripheral wall 13b of the motor housing 13.

[0052] A plurality of teeth 25 extend from the inner circumferential surface 24a of the yoke body 24 in the radial direction of the yoke body 24. The plurality of teeth 25 are arranged at intervals in the circumferential direction of the yoke body 24. The plurality of teeth 25 are arranged at equal intervals in the circumferential direction of the yoke body 24. In addition, the circumferential direction of the yoke body 24 is also the circumferential direction of the stator core 23. Each tooth 25 extends from the inner circumferential surface 24a of the yoke body 24 toward the axis of the stator core 23. In the present embodiment, the stator core 23 has 15 teeth 25. In addition, the number of teeth 25 is not particularly limited, but the number of teeth 25 is a multiple of 3.

[0053] like Figure 3 As shown, both end surfaces of the yoke body 24 located in the axial direction of the rotating shaft 15 are flat surfaces. Both end surfaces of each tooth 25 located in the axial direction of the rotating shaft 15 are flat surfaces. The length of the yoke body 24 in the axial direction of the rotating shaft 15 is the same as the length of each tooth 25 in the axial direction of the rotating shaft 15. The end surface of the yoke body 24 located on one side of the axial direction of the rotating shaft 15 and the end surface of each tooth 25 located on one side of the axial direction of the rotating shaft 15 are located on the same plane. The end surface of the yoke body 24 located on the other side of the axial direction of the rotating shaft 15 and the end surface of each tooth 25 located on the other side of the axial direction of the rotating shaft 15 are located on the same plane.

[0054] The end face of the yoke 24 located on one side in the axial direction of the rotating shaft 15 and the end face of each tooth 25 located on one side in the axial direction of the rotating shaft 15 form the first core end face 23a of the stator core 23 located on one side in the axial direction of the rotating shaft 15. The end face of the yoke 24 located on the other side in the axial direction of the rotating shaft 15 and the end face of each tooth 25 located on the other side in the axial direction of the rotating shaft 15 form the second core end face 23b of the stator core 23 located on the other side in the axial direction of the rotating shaft 15. Therefore, the stator core 23 has the first core end face 23a and the second core end face 23b. The first core end face 23a is the core end face of the stator core 23 located on one side in the axial direction of the rotating shaft 15. The second core end face 23b is the core end face of the stator core 23 located on the other side in the axial direction of the rotating shaft 15.

[0055] like Figure 1 As shown, the stator core 23 is arranged in the motor housing 13 such that the first core end surface 23 a faces the shaft support member 18 in the axial direction of the rotating shaft 15 and the second core end surface 23 b faces the end wall 13 a of the motor housing 13 in the axial direction of the rotating shaft 15 .

[0056] like Figure 2 and Figure 3 As shown, each tooth 25 has a tooth extension portion 26 and a tooth flange portion 27. The tooth extension portion 26 is a thin plate extending from the inner peripheral surface 24a of the yoke body 24. The tooth extension portion 26 extends from the first core end surface 23a to the second core end surface 23b of the stator core 23. The tooth flange portion 27 protrudes from the end of the tooth extension portion 26 on the side opposite to the yoke body 24 to both sides of the stator core 23 in the circumferential direction.

[0057] like Figure 2 As shown, the stator 22 includes a plurality of coils, namely, a U-phase coil 28U, a V-phase coil 28V, and a W-phase coil 28W. Therefore, the stator 22 includes multi-phase coils. The multi-phase coils include the U-phase coil 28U, the V-phase coil 28V, and the W-phase coil 28W.

[0058] <Winding>

[0059] The stator 22 includes a U-phase winding 29U, which is a winding formed by winding on the stator core 23 in a concentrated winding manner to form a plurality of U-phase coils 28U. The stator 22 includes a V-phase winding 29V, which is a winding formed by winding on the stator core 23 in a concentrated winding manner to form a plurality of V-phase coils 28V. The stator 22 includes a W-phase winding 29W, which is a winding formed by winding on the stator core 23 in a concentrated winding manner to form a plurality of W-phase coils 28W. Therefore, the stator 22 includes a multi-phase winding. The winding includes a U-phase winding 29U, a V-phase winding 29V, and a W-phase winding 29W. The multi-phase coils are formed by winding the multi-phase windings on the stator core 23 in a concentrated winding manner.

[0060] In addition, if Figure 8 As shown, the U-phase winding 29U, the V-phase winding 29V, and the W-phase winding 29W are provided with an enamel coating 29b as a coating on the outer circumference of the conductive wire 29a. Therefore, the winding includes the conductive wire 29a and the enamel coating 29b provided on the outer circumference of the conductive wire 29a.

[0061] Parts of the U-phase coil 28U, the V-phase coil 28V, and the W-phase coil 28W pass through the grooves 30, which are spaces formed between the teeth 25 adjacent to each other in the circumferential direction of the stator core 23. In addition, the parts of the U-phase coil 28U, the V-phase coil 28V, and the W-phase coil 28W passing through the grooves 30 are insulated from the stator core 23 by the groove insulation sheets 31.

[0062] like Figure 1 As shown, the stator 22 includes a first coil end 32 and a second coil end 33. The first coil end 32 is a part of each of the U-phase coil 28U, the V-phase coil 28V, and the W-phase coil 28W, and protrudes from the first core end surface 23a. The second coil end 33 is a part of each of the U-phase coil 28U, the V-phase coil 28V, and the W-phase coil 28W, and protrudes from the second core end surface 23b. Therefore, the first coil end 32 and the second coil end 33 are parts of the coils of each phase and are coil ends protruding from the core end surface.

[0063] <Insulation>

[0064] The stator 22 includes two insulators 50 . Each insulator 50 is cylindrical. Each insulator 50 is made of, for example, a resin material. Each insulator 50 insulates the U-phase coil 28U, the V-phase coil 28V, and the W-phase coil 28W from the stator core 23 .

[0065] like Figure 3 As shown, each insulator 50 has an insulator base 51 and a plurality of insulator teeth 52. The insulator base 51 is cylindrical. Each insulator 50 is arranged relative to the stator core 23 in a state where the axis of each insulator base 51 is consistent with the axis of the yoke body 24. One of the two insulators 50 is arranged relative to the first core end face 23a in a state of contact with the first core end face 23a of the stator core 23. The other of the two insulators 50 is arranged relative to the second core end face 23b in a state of contact with the second core end face 23b of the stator core 23. Therefore, each insulator 50 is arranged relative to the core end face of the stator core 23. The outer diameter of the insulator base 51 is smaller than the outer diameter of the yoke body 24. The inner diameter of the insulator base 51 is the same as the inner diameter of the yoke body 24.

[0066] Each insulator tooth portion 52 extends from the inner circumferential surface 51a of each insulator base portion 51 in the radial direction of the insulator base portion 51. A plurality of insulator tooth portions 52 are arranged at intervals in the circumferential direction of the insulator base portion 51. A plurality of insulator tooth portions 52 are arranged at equal intervals in the circumferential direction of the insulator base portion 51. Each insulator tooth portion 52 extends from the inner circumferential surface 51a of the insulator base portion 51 toward the axis of the insulator base portion 51. In the present embodiment, the insulator 50 has 15 insulator tooth portions 52. The number of insulator tooth portions 52 is the same as the number of teeth 25 included in the stator core 23.

[0067] Each insulator tooth portion 52 includes an insulator extension portion 53 and an insulator flange portion 54. The insulator extension portion 53 is a columnar portion extending from the inner peripheral surface 51a of the insulator base portion 51. The circumferential width of the insulator base portion 51 in each insulator extension portion 53 is the same as the circumferential width of the stator core 23 in each tooth extension portion 26. Each insulator extension portion 53 is in contact with each tooth 25. The insulator flange portion 54 protrudes from the end portion of the insulator extension portion 53 on the side opposite to the insulator base portion 51 along the insulator base portion 51.

[0068] The insulating member 50 of the two insulating members 50, which is arranged relative to the first core end face 23a of the stator core 23, has a U-phase guide groove 61U, a V-phase guide groove 61V, and a W-phase guide groove 61W. The U-phase guide groove 61U, the V-phase guide groove 61V, and the W-phase guide groove 61W are arranged in an axial direction of the insulating member 50. The U-phase guide groove 61U, the V-phase guide groove 61V, and the W-phase guide groove 61W are formed on the outer peripheral surface of the insulating member base 51. Therefore, the U-phase guide groove 61U, the V-phase guide groove 61V, and the W-phase guide groove 61W are formed on the outer peripheral surface of the insulating member 50. The U-phase guide groove 61U, the V-phase guide groove 61V, and the W-phase guide groove 61W extend in the circumferential direction of the insulating member 50.

[0069] The insulating member 50 disposed on the first core end surface 23a of the stator core 23 of the two insulating members 50 has five U-phase through grooves 62U, five V-phase through grooves 62V, and five W-phase through grooves 62W. Each U-phase through groove 62U, each V-phase through groove 62V, and each W-phase through groove 62W penetrates the insulating member 50 in the radial direction.

[0070] <Coil>

[0071] like Figure 4 As shown, the U-phase coil 28U, the V-phase coil 28V, and the W-phase coil 28W are formed by series winding. In the series winding, first, the U-phase winding 29U, the V-phase winding 29V, and the W-phase winding 29W are wound with respect to each tooth extension portion 26 and the insulating member extension portion 53 of each insulating member 50. Then, with respect to the tooth extension portion 26 and the insulating member extension portion 53 of each insulating member 50 arranged at intervals of two in the circumferential direction of the stator core 23, the U-phase winding 29U, the V-phase winding 29V, and the W-phase winding 29W are wound in sequence in a concentrated winding manner. Therefore, the U-phase coil 28U, the V-phase coil 28V, and the W-phase coil 28W are arranged at intervals of two in the circumferential direction of the stator core 23. In the present embodiment, five U-phase coils 28U, five V-phase coils 28V, and five W-phase coils 28W are arranged. The U-phase coil 28U, the V-phase coil 28V, and the W-phase coil 28W are arranged in each slot 30 so that different phases are adjacent to each other in the circumferential direction of the stator core 23 .

[0072] Of the two insulating members 50, the insulating member 50 disposed relative to the first core end face 23a of the stator core 23 insulates the U-phase coil 28U, the V-phase coil 28V, and the W-phase coil 28W from the first core end face 23a. Of the two insulating members 50, the insulating member 50 disposed relative to the second core end face 23b of the stator core 23 insulates the U-phase coil 28U, the V-phase coil 28V, and the W-phase coil 28W from the second core end face 23b.

[0073] The U-phase winding 29U includes a U-phase jumper wire 64U which is a jumper wire connecting the U-phase coils 28U to each other in the circumferential direction of the stator core 23. The U-phase jumper wire 64U is drawn out from the first coil end 32 of the U-phase coil 28U and guided to the U-phase guide groove 61U via the U-phase through groove 62U. The V-phase winding 29V includes a V-phase jumper wire 64V which is a jumper wire connecting the V-phase coils 28V to each other in the circumferential direction of the stator core 23. The V-phase jumper wire 64V is drawn out from the first coil end 32 of the V-phase coil 28V and guided to the V-phase guide groove 61V via the V-phase through groove 62V. The W-phase winding 29W includes a W-phase jumper wire 64W which is a jumper wire connecting the W-phase coils 28W to each other in the circumferential direction of the stator core 23. The W-phase jumper wire 64W is drawn out from the first coil end 32 of the W-phase coil 28W and guided to the W-phase guide groove 61W via the W-phase through groove 62W.

[0074] <Hood>

[0075] like Figure 5 As shown, the electric compressor 10 includes a cover 65. The cover 65 is cylindrical. The cover 65 has insulating properties. The cover 65 is made of, for example, a resin material. The inner diameter of the cover 65 is larger than the outer diameter of the insulator base 51. The cover 65 is attached to the insulator 50 in a state of surrounding the outer peripheral surface of the insulator 50 arranged relative to the first core end surface 23a of the stator core 23 among the two insulators 50.

[0076] like Figure 1 As shown, the cover 65 is interposed between the U-phase bonding wire 64U, the V-phase bonding wire 64V, and the W-phase bonding wire 64W and the peripheral wall 13b of the motor housing 13. The cover 65 ensures insulation between the U-phase bonding wire 64U, the V-phase bonding wire 64V, and the W-phase bonding wire 64W and the motor housing 13.

[0077] <Cover Parts>

[0078] like Figure 6As shown, the stator 22 includes a cover member 70. The cover member 70 is roughly cylindrical. The cover member 70 has insulating properties. The cover member 70 is made of, for example, a resin material. The cover member 70 is arranged on the side opposite to the second core end face 23b in the axial direction of the rotating shaft 15 relative to the second coil end 33. The cover member 70 is mounted on the insulating member 50 that is arranged relative to the second core end face 23b of the stator core 23 among the two insulating members 50. In addition, the structure for mounting the cover member 70 on the insulating member 50 is not particularly limited. For example, the cover member 70 is mounted on the insulating member 50 by engaging a convex portion protruding from the cover member 70 with a concave convex portion formed in the insulating member 50.

[0079] like Figure 6 and Figure 7 As shown, the cover member 70 has a cover end surface 71. The cover end surface 71 is located on the side opposite to the second coil end 33 in the axial direction of the rotating shaft 15. The cover end surface 71 is generally annular. An insulating storage portion 72 is provided on the cover end surface 71. The storage portion 72 is, for example, in the shape of a square tube (square tube). Figure 7 As shown, the storage portion 72 includes an end wall 72a and a peripheral wall 72b. The peripheral wall 72b extends from the outer peripheral portion of the end wall 72a in a square tube shape.

[0080] <Leader Line>

[0081] The stator 22 includes three lead wires 73. Each lead wire 73 is a part of the U-phase winding 29U, the V-phase winding 29V, and the W-phase winding 29W. Each lead wire 73 is led out from the second coil end 33 of the U-phase coil 28U, the V-phase coil 28V, and the W-phase coil 28W. Therefore, the three lead wires 73 correspond to each phase.

[0082] Each phase lead wire 73 is a part of each of the U-phase winding 29U, the V-phase winding 29V, and the W-phase winding 29W, and thus has an enamel coating 29b applied to the outer circumference of the conductor 29a, similarly to the U-phase winding 29U, the V-phase winding 29V, and the W-phase winding 29W. Each phase lead wire 73 also has a covering portion 75 formed by covering the outer circumference of the enamel coating 29b with a tubular resin insulating member 74, and a non-covering portion 76 where the insulating member 74 is not provided. Figure 6 and Figure 7 Insulating member 74 is shown by dotted hatching in FIG. As described above, the winding and lead wire 73 as a part thereof are provided with enamel coating 29b on the outer peripheral side of conductive wire 29a, and insulating member 74 covers the lead wire 73 on the outer peripheral side.

[0083] like Figure 7As shown, the end of each phase lead wire 73 is a non-covered portion 76 where no insulating member 74 is arranged, and a neutral point connection portion 77 is formed by mutually electrically connecting to form a neutral point. Therefore, the stator 22 includes a neutral point connection portion 77 that forms a neutral point by mutually electrically connecting the ends of each phase lead wire 73. The non-covered portion 76 includes the neutral point connection portion 77.

[0084] The neutral point connection portion 77 is accommodated in the storage portion 72. Therefore, the storage portion 72 accommodates the neutral point connection portion 77. The neutral point connection portion 77 is inserted into the storage portion 72 through the opening of the peripheral wall 72b of the storage portion 72. In addition, the non-covered portion 76 has an extension portion 78, which is a portion that is continuous with the neutral point connection portion 77 and extends from the storage portion 72 to the outside of the storage portion 72 by a predetermined length. The extension portion 78 extends to the outside of the storage portion 72 through the opening of the peripheral wall 72b of the storage portion 72. In this way, each phase lead wire 73 has a non-covered portion 76, which is not provided with an insulating component 74, includes a neutral point connection portion 77, and has an extension portion 78, which is a portion that is continuous with the neutral point connection portion 77 and extends from the storage portion 72 to the outside of the storage portion 72 by a predetermined length. The covering portion 75 is continuous with a portion of the extending portion 78 on the opposite side to the neutral point connecting portion 77 .

[0085] like Figure 8 As shown in FIG. 1 , the storage portion 72 is filled with resin 79. Figure 8 In the figure, the resin 79 is shown by dotted hatching. The inside of the housing portion 72 is sealed by the resin 79. In detail, when the neutral point connection portion 77 is inserted into the housing portion 72, the resin 79 flows into the housing portion 72 and is cured, so that the inside of the housing portion 72 is sealed by the resin 79. Thus, the insulation of the neutral point connection portion 77 is ensured.

[0086] <Page 1 and 2>

[0087] like Figure 6 and Figure 7 As shown, the cover end surface 71 has a first surface 81 and a second surface 82. The first surface 81 is arranged at a position farther from the second coil end 33 than the second surface 82. The second surface 82 is a surface different from the first surface 81. The first surface 81 and the second surface 82 are flat surfaces extending parallel to each other. The cover end surface 71 has a connecting surface 83. The connecting surface 83 connects the first surface 81 and the second surface 82. The connecting surface 83 extends obliquely relative to the first surface 81 and the second surface 82.

[0088] The first surface 81 includes a mounting surface 84 on which the storage portion 72 is mounted and an extension surface 85 on which the extension portion 78 is disposed. The extension surface 85 is located closer to the connection surface 83 than the mounting surface 84. In addition, the cover end surface 71 includes a peripheral surface 86 that connects the end portion of the second surface 82 on the side opposite to the connection surface 83 and the end portion of the first surface 81 on the side opposite to the connection surface 83. The peripheral surface 86 extends in the circumferential direction of the cover end surface 71. The peripheral surface 86 and the first surface 81 are located on the same plane.

[0089] like Figure 7 As shown, a plurality of locking (engagement stop) pieces 87 are provided on the loading surface 84. Each locking piece 87 stands up from the loading surface 84. The front end of each locking piece 87 is hook-shaped. Each locking piece 87 is configured to be able to lock the storage portion 72. The storage portion 72 is mounted on the cover end surface 71 in a state of being loaded on the loading surface 84 by being locked to each locking piece 87. Therefore, the storage portion 72 is a component independent of the cover component 70. The extension portion 78 of each phase lead wire 73 passes on the extension surface 85. In this way, the storage portion 72 and the extension portion 78 are arranged on the first surface 81.

[0090] The coating portion 75 of the lead wire 73 of each phase passes on the second surface 82. Therefore, the coating portion 75 is arranged on the second surface 82. In addition, a part of the coating portion 75 of the lead wire 73 of each phase extends along the connection surface 83.

[0091] <Restriction>

[0092] The cover member 70 includes a limiting portion 90. The limiting portion 90 includes a rising piece 90a rising from the outer peripheral edge of the second surface 82, and a limiting piece 90b bent from the front end of the rising piece 90a and extending in a manner overlapping with the second surface 82 in the axial direction of the rotation shaft 15. In addition, the covering portion 75 passes between the second surface 82 and the limiting piece 90b. The limiting piece 90b limits the movement of the covering portion 75 in the direction away from the second surface 82. Therefore, the limiting portion 90 limits the movement of the covering portion 75 in the direction away from the second surface 82.

[0093] <Insulating Wall>

[0094] The cover member 70 has an insulating wall portion 91. The insulating wall portion 91 is a thin plate that stands upright from the following portion in the cover member 70, which is a portion that extends from the outer peripheral edge of the extension surface 85 to the outer peripheral edge of the connection surface 83 and reaches the outer peripheral edge of the second surface 82. The insulating wall portion 91 covers the extension portion 78 from the radially outer side of the rotating shaft 15.

[0095] <Through hole>

[0096] A through hole 92 is formed on each of the first surface 81 and the second surface 82. Therefore, the through hole 92 is formed at least on the first surface 81. The through hole 92 penetrates the cover member 70. The first end of each through hole 92 opens to the cover end surface 71. The second end of each through hole 92 opens to the end surface of the cover member 70 located on the second coil end 33 side. Each through hole 92 allows the refrigerant sucked into the motor chamber S2 to flow toward the second coil end 33.

[0097] <Airtight terminal>

[0098] like Figure 1 As shown in FIG. 1 , the electric compressor 10 includes an airtight terminal 40. The airtight terminal 40 includes three conductive members 41 corresponding to the U-phase coil 28U, the V-phase coil 28V, and the W-phase coil 28W. Therefore, the electric compressor 10 includes the conductive member 41. Figure 1 In the figure, only one conductive component 41 is shown. Each conductive component 41 is a cylindrical metal terminal extending in a straight line. The first end of each conductive component 41 is electrically connected to the converter 17 in the converter chamber S1. The second end of each conductive component 41 protrudes from the converter chamber S1 into the motor housing 13 through the hole 13h. In addition, the airtight terminal 40 has a support plate 42. The support plate 42 supports the three conductive components 41 in a mutually insulated state. The support plate 42 is fixed around the hole 13h on the outer surface of the end wall 13a of the motor housing 13 in the converter chamber S1.

[0099] The stator 22 has a lead wire 43. The lead wire 43 is led out from the motor 20. The lead wire 43 is led out from the second coil end 33 of each of the U-phase coil 28U, the V-phase coil 28V, and the W-phase coil 28W. Therefore, the lead wire 43 is led out from the coil end of each phase. Thus, three lead wires 43 are led out from the motor 20. Figure 1 In FIG. 4 , only one lead 43 is shown.

[0100] The stator 22 includes a cluster block 44. The cluster block 44 accommodates three connection terminals 45 corresponding to the U-phase coil 28U, the V-phase coil 28V, and the W-phase coil 28W. The cluster block 44 has insulating properties. The cluster block 44 is made of, for example, a resin material. Each connection terminal 45 electrically connects each conductive member 41 to each lead wire 43.

[0101] The power from the inverter 17 is supplied to the motor 20 via the conductive members 41 , the connection terminals 45 , and the lead wires 43 . This drives the motor 20 . Therefore, the inverter 17 drives the motor 20 .

[0102] like Figure 6As shown, the cluster block 44 is arranged relative to the cover member 70 at a position overlapping with the peripheral surface 86 of the cover end surface 71 in the axial direction of the rotating shaft 15. Therefore, the cluster block 44 is arranged relative to the cover member 70 at a position not overlapping with the storage portion 72 in the axial direction of the rotating shaft 15.

[0103] [Effects of implementation methods]

[0104] Next, the operation of this embodiment will be described.

[0105] The refrigerant sucked into the motor chamber S2 flows toward the second coil end 33 through each through hole 92. Therefore, the U-phase coil 28U, the V-phase coil 28V and the W-phase coil 28W are efficiently cooled by the refrigerant. In addition, on the cover end surface 71, the first surface 81 is arranged at a position farther from the second coil end 33 than the second surface 82. Therefore, the insulation distance between the extension portion 78 arranged on the first surface 81 and the second coil end 33 through the through hole 92 becomes longer. Therefore, the situation where the extension portion 78 and the second coil end 33 become poorly insulated through the through hole 92 is suppressed. Furthermore, the covering portion 75 arranged on the second surface 82 is a portion of the lead wire 73 of each phase that is covered by the insulating component 74. Therefore, even if the second surface 82 is closer to the second coil end 33 than the first surface 81, the covering portion 75 and the second coil end 33 will not become poorly insulated through the through hole 92. Therefore, insulation between the lead wires 73 of each phase and the second coil end 33 is ensured.

[0106] [Effects of Embodiment]

[0107] The following effects can be obtained in the above-mentioned embodiment.

[0108] (1) The refrigerant sucked into the motor chamber S2 flows toward the second coil end 33 through the through holes 92, so the U-phase coil 28U, the V-phase coil 28V and the W-phase coil 28W can be efficiently cooled by the refrigerant. In addition, on the cover end surface 71, the first surface 81 is arranged at a position farther from the second coil end 33 than the second surface 82. Therefore, the insulation distance between the extension portion 78 arranged on the first surface 81 and the second coil end 33 through the through hole 92 can be extended. Therefore, it is possible to prevent the extension portion 78 and the second coil end 33 from being poorly insulated through the through hole 92. In addition, by effectively utilizing the space generated by the second surface 82 being closer to the second coil end 33 than the first surface 81, it is possible to seek miniaturization of the electric compressor 10 in the axial direction of the rotating shaft 15. As described above, the U-phase coil 28U, the V-phase coil 28V, and the W-phase coil 28W can be cooled while ensuring insulation between the lead wires 73 of each phase and the second coil end 33 while miniaturizing the electric compressor 10 in the axial direction of the rotating shaft 15 .

[0109] (2) The cluster block 44 is arranged at a position that does not overlap with the housing portion 72 in the axial direction of the rotating shaft 15 relative to the cover member 70. Accordingly, the cluster block 44 can be arranged at a position as close to the second coil end 33 as possible, compared with a case where the cluster block 44 is arranged at a position that overlaps with the housing portion 72 in the axial direction of the rotating shaft 15 relative to the cover member 70. Therefore, the electric compressor 10 in the axial direction of the rotating shaft 15 can be further miniaturized.

[0110] (3) The cover member 70 includes the insulating wall portion 91 that covers the extension portion 78 of the lead wires 73 of each phase from the radially outer side of the rotating shaft 15. According to this, the insulating wall portion 91 can ensure insulation between, for example, the extension portion 78 and the housing 11. Therefore, by including the insulating wall portion 91 in the cover member 70, the insulation of the lead wires 73 of each phase can be further ensured.

[0111] (4) The connection surface 83 extends obliquely with respect to the first surface 81 and the second surface 82. Therefore, the lead wires 73 of each phase can be extended without being extremely bent at the portion extending between the first surface 81 and the second surface 82. Therefore, the load applied to the lead wires 73 of each phase can be suppressed, so the durability of the lead wires 73 of each phase can be improved.

[0112] (5) The cover member 70 has a restriction portion 90 that restricts movement of the covering portion 75 of each phase lead wire 73 in a direction away from the second surface 82. Thus, the restriction portion 90 can be used to make the covering portion 75 of each phase disposed on the second surface 82 as close to the second surface 82 as possible. Therefore, the covering portion 75 of each phase disposed on the second surface 82 can be disposed as close to the second coil end 33 as possible. Therefore, the electric compressor 10 in the axial direction of the rotating shaft 15 can be further miniaturized.

[0113] (6) The storage portion 72 is mounted on the cover end surface 71 while being placed on the placement surface 84 by being locked to the locking pieces 87. Therefore, for example, the process of fastening the neutral point connection portion 77 to the second coil end 33 with a fixing wire is no longer necessary, so the operation process can be simplified.

[0114] (7) Since the housing portion 72 is provided on the cover end surface 71 , the electric compressor 10 can be made smaller in the radial direction of the rotating shaft 15 compared to a case where the housing portion 72 is provided on the outer peripheral side of the insulator 50 , for example.

[0115] (8) For example, if the portion of the lead wire 73 of each phase located in the housing portion 72 is covered with the insulating member 74, the resin 79 flowing into the housing portion 72 may not be able to adhere to the insulating member 74, so that it may be difficult to seal the housing portion 72 with the resin 79. Therefore, in the lead wire 73 of each phase, in addition to the portion of the lead wire 73 located in the housing portion 72, the insulating member 74 is not arranged in the portion extending from the housing portion 72 to the outside of the housing portion 72 by a predetermined length. In this way, the lead wire 73 of each phase has a non-covered portion 76 in which the insulating member 74 is not arranged, the non-covered portion 76 includes a neutral point connection portion 77, and has an extension portion 78 which is a portion that is continuous with the neutral point connection portion 77 and extends from the housing portion 72 to the outside of the housing portion 72 by a predetermined length. Thus, even if there is an error in the design dimensions of the housing portion 72, the portion of the lead wires 73 of each phase located in the housing portion 72 can be reliably inserted as the non-covered portion 76 where the insulating member 74 is not disposed. Therefore, the housing portion 72 can be reliably sealed with the resin 79.

[0116] [Change example]

[0117] In addition, the above-mentioned embodiment can be implemented with modifications as follows. The above-mentioned embodiment and the following modifications can be implemented in combination with each other within the scope of no technical contradiction.

[0118] In the embodiment, the arrangement position of the cluster block 44 with respect to the cover member 70 is not particularly limited.

[0119] In the embodiment, the cover member 70 may be configured not to include the insulating wall portion 91 .

[0120] In the embodiment, the connection surface 83 connecting the first surface 81 and the second surface 82 may not extend at an inclination. The connection surface 83 may be, for example, a stepped surface extending in a direction perpendicular to the first surface 81 and the second surface 82 .

[0121] In the embodiment, the cover member 70 may not include the restriction portion 90 .

[0122] In the embodiment, the storage portion 72 may be formed integrally with the cover member 70 .

[0123] In the embodiment, the peripheral surface 86 of the cover end surface 71 may not be located on the same plane as the first surface 81. For example, the peripheral surface 86 may be located on the same plane as the second surface 82.

[0124] In the embodiment, a portion of the covering portion 75 may be disposed on the extending surface 85 .

[0125] In the embodiment, the through hole 92 does not necessarily need to be formed on the second surface 82 .

[0126] In the embodiment, the cover member 70 may be attached to the stator core 23 instead of being attached to the insulator 50 .

[0127] In the embodiment, the cover member 70 may not be substantially cylindrical. For example, the cover member 70 may be in a shape in which a portion of the cover member 70 where the peripheral surface 86 is formed is removed.

[0128] In the embodiment, the compression unit 16 is not limited to the scroll type, and may be, for example, a piston type, a vane type, or the like.

[0129] In the embodiment, the electric compressor 10 is used in a vehicle air conditioner, but the present invention is not limited thereto. For example, the electric compressor 10 may be mounted on a fuel cell vehicle and may compress air as a fluid supplied to a fuel cell by the compression unit 16 .

[0130] [Note]

[0131] The above-mentioned embodiment includes the configurations described in the following supplementary notes.

[0132] <Additional Note 1>

[0133] An electric compressor comprising:

[0134] Axis of rotation;

[0135] a compression part that compresses the fluid by the rotation of the rotating shaft;

[0136] a motor to rotate the rotating shaft; and

[0137] The housing has a motor chamber for accommodating the motor, and the fluid is sucked into the motor chamber.

[0138] The motor comprises a stator,

[0139] The stator has:

[0140] A stator core, fixed to the housing;

[0141] A multi-phase coil is formed by winding a multi-phase winding around the stator core in a concentrated winding manner;

[0142] an insulator disposed relative to a core end surface of the stator core located in the axial direction of the rotating shaft and insulating between the coil and the core end surface;

[0143] A coil end, which is a part of the coil of each phase and protrudes from the core end surface;

[0144] Lead wires are part of the windings of each phase and are led out from the coil ends of each phase respectively;

[0145] a neutral point connection portion, which is a connection portion forming a neutral point by electrically connecting the ends of the lead wires of each phase to each other; and

[0146] The insulating cover member is arranged on the side opposite to the core end surface in the axial direction with respect to the coil end.

[0147] The winding includes a conductive wire and a coating applied to an outer peripheral side of the conductive wire.

[0148] The cover member has a cover end surface located on the side opposite to the coil end in the axial direction.

[0149] An insulating receiving portion for receiving the neutral point connecting portion is provided on the end surface of the cover.

[0150] The lead wires of each phase have:

[0151] a covering portion, wherein the outer peripheral side of the coating is covered by an insulating member; and

[0152] a non-covering portion, which is not provided with the insulating member, includes the neutral point connection portion, and has a portion, namely, an extension portion, which is continuous with the neutral point connection portion and extends from the housing portion to the outside of the housing portion by a predetermined length,

[0153] The cover end surface has:

[0154] The first surface is provided with the storage portion and the extension portion; and

[0155] The second side is a side different from the first side.

[0156] A through hole is formed on at least the first surface so that the fluid sucked into the motor chamber flows toward the coil end.

[0157] The electric compressor is characterized in that

[0158] The first surface is arranged at a position farther from the coil end than the second surface.

[0159] <Note 2>

[0160] The electric compressor according to <Supplementary Note 1> is characterized in that:

[0161] have:

[0162] an inverter driving the motor; and

[0163] a conductive member electrically connected to the converter,

[0164] The stator has:

[0165] Lead wires extending from the coil ends of each phase; and

[0166] The insulating cluster block contains connection terminals for electrically connecting the conductive member and the lead wire.

[0167] The cluster block is arranged at a position with respect to the cover member that does not overlap with the housing portion in the axial direction.

[0168] <Addendum 3>

[0169] The electric compressor according to <Supplement 1> or <Supplement 2>, characterized in that:

[0170] The cover member includes an insulating wall portion that covers the extending portion from the radially outer side of the rotating shaft.

[0171] <Addendum 4>

[0172] The electric compressor according to any one of <Supplement 1> to <Supplement 3>, characterized in that:

[0173] The first surface and the second surface are flat surfaces extending parallel to each other.

[0174] The cover end surface has a connection surface connecting the first surface and the second surface,

[0175] The connecting surface extends obliquely with respect to the first surface and the second surface.

[0176] <Addendum 5>

[0177] The electric compressor according to any one of <Supplement 1> to <Supplement 4>, characterized in that:

[0178] The cover member includes a restriction portion that restricts movement of the covering portion in a direction away from the second surface.

[0179] Description of Reference Numerals

[0180] 10 ... electric compressor, 11 ... housing, 15 ... rotating shaft, 16 ... compression unit, 17 ... inverter, 20 ... motor, 22 ... stator, 23 ... stator core, 23a ... a first core end surface as a core end surface, 23b ... a second core end surface as a core end surface, 28U ... a U-phase coil as a coil, 28V ... a V-phase coil as a coil, 28W ... a W-phase coil as a coil, 29a ... a conducting wire, 29b ... an enamel coating as a coating, 29U ... a U-phase winding as a winding, 29V ... a V-phase winding as a winding, 29W ... a W-phase winding as a winding Phase winding, 32…a first coil end serving as a coil end, 33…a second coil end serving as a coil end, 41…a conductive component, 43…a lead wire, 44…a cluster block, 45…a connecting terminal, 50…an insulating member, 70…a cover component, 71…a cover end surface, 72…a storage portion, 73…a lead wire, 74…an insulating component, 75…a covered portion, 76…a non-covered portion, 77…a neutral point connecting portion, 78…an extension portion, 81…a first surface, 82…a second surface, 83…a connecting surface, 90…a limiting portion, 91…an insulating wall portion, 92…a through hole, S2…a motor chamber.

Claims

1. An electric compressor comprising: Axis of rotation; a compression part that compresses the fluid by the rotation of the rotating shaft; a motor to rotate the rotating shaft; and The housing has a motor chamber for accommodating the motor, and the fluid is sucked into the motor chamber. The motor comprises a stator, The stator has: A stator core, fixed to the housing; A multi-phase coil is formed by winding a multi-phase winding around the stator core in a concentrated winding manner; an insulator disposed relative to a core end surface of the stator core located in the axial direction of the rotating shaft and insulating between the coil and the core end surface; A coil end, which is a part of the coil of each phase and protrudes from the core end surface; Lead wires are part of the windings of each phase and are led out from the coil ends of each phase respectively; a neutral point connection portion, which is a connection portion forming a neutral point by electrically connecting the ends of the lead wires of each phase to each other; and The insulating cover member is arranged on the side opposite to the core end surface in the axial direction with respect to the coil end. The winding includes a conductive wire and a coating applied to an outer peripheral side of the conductive wire. The cover member has a cover end surface located on the side opposite to the coil end in the axial direction. An insulating receiving portion for receiving the neutral point connecting portion is provided on the end surface of the cover. The lead wires of each phase have: a covering portion, wherein the outer peripheral side of the coating is covered by an insulating member; and The non-covered portion is a portion where the insulating component is not arranged, includes the neutral point connection portion and has an extension portion, wherein the extension portion is a portion that is continuous with the neutral point connection portion and extends from the housing portion to the outside of the housing portion by a predetermined length. The cover end surface has: The first surface is provided with the storage portion and the extension portion; and The second side is a side different from the first side. A through hole is formed on at least the first surface so that the fluid sucked into the motor chamber flows toward the coil end. The electric compressor is characterized in that The first surface is arranged at a position farther from the coil end than the second surface.

2. The electric compressor according to claim 1, characterized in that: have: an inverter driving the motor; and a conductive member electrically connected to the converter, The stator has: Lead wires extending from the coil ends of each phase; and The insulating cluster block accommodates a connection terminal for electrically connecting the conductive member and the lead wire therein, and the cluster block is arranged at a position that does not overlap with the housing portion in the axial direction relative to the cover member.

3. The electric compressor according to claim 1 or 2, characterized in that: The cover member includes an insulating wall portion that covers the extending portion from the radially outer side of the rotating shaft.

4. The electric compressor according to any one of claims 1 to 3, characterized in that: The first surface and the second surface are flat surfaces extending parallel to each other. The cover end surface has a connection surface connecting the first surface and the second surface, The connecting surface extends obliquely with respect to the first surface and the second surface.

5. The electric compressor according to any one of claims 1 to 4, characterized in that: The cover member includes a restriction portion that restricts movement of the covering portion in a direction away from the second surface.

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