CN111357172A

CN111357172A - Motor, compressor, and refrigeration cycle device

Info

Publication number: CN111357172A
Application number: CN201780097016.0A
Authority: CN
Inventors: 大野真史; N·真维拉瓦特
Original assignee: Mitsubishi Electric Corp; Siam Compressor Industry Co Ltd
Current assignee: Mitsubishi Electric Corp; Siam Compressor Industry Co Ltd
Priority date: 2017-11-24
Filing date: 2017-11-24
Publication date: 2020-06-30
Also published as: JPWO2019102574A1; WO2019102574A1

Abstract

A wire harness (45) of a stator (41) is formed by bundling 3 wires, namely a 1 st lead wire (71), a 2 nd lead wire (72) and a 3 rd lead wire (73). A1 st lead wire (71), a 2 nd lead wire (72), and a 3 rd lead wire (73) of the wire harness (45) are formed by directly drawing out the end portions of the coil (44), respectively. The portion of the wire harness (45) from the lead wire fixing position (P1) to the lead wire intermediate position (P2) is twisted. The leading ends of the 1 st lead wire (71), the 2 nd lead wire (72), and the 3 rd lead wire (73) of the wire harness (45) are respectively caulked to the crimp terminals. The crimp terminal is housed inside the bundle joint (46). The cluster joint (46) is connected to a power supply terminal of the compressor.

Description

Motor, compressor, and refrigeration cycle device

Technical Field

The invention relates to a motor, a compressor and a refrigeration cycle device.

Background

In the compressor described in patent document 1, the leading end of a lead wire formed by extending an end portion of a coil of a motor stator is caulked with a crimp terminal, and a connection terminal for power supply is sandwiched and fixed between nuts fitted to the crimp terminal, thereby supplying power to the motor stator.

Patent document 1: japanese patent laid-open No. 2012 and 036733

The lead wire is soft and easily deformed, and therefore easily contacts the housing or the motor rotor. Since the lead wire has a thin insulating film and low insulation, insulation failure occurs when the lead wire contacts the housing or the motor rotor.

Since the portion of the crimp terminal swaged to the lead wire is weak in mechanical strength, if the portion is twisted when the nut is fitted or when the connection terminal for power supply is fixed, the lead wire is easily broken.

Disclosure of Invention

The purpose of the present invention is to ensure the strength of a portion connected to a power terminal of a harness for electrically connecting a coil of a motor to a power terminal of a compressor, and to prevent the harness from coming into contact with a container or a rotor of the compressor.

A motor according to an aspect of the present invention is used by being housed in a container of a compressor, and includes: a coil; and a wire harness formed by bundling two or more wires, one end of which is electrically connected to the coil and the other end of which is electrically connected to a power supply terminal of the compressor, and at least a part of the portion other than the other end is twisted.

In the present invention, at least a part of a portion of the electric wire bundle, in which the coil of the motor is electrically connected to the power terminal of the compressor, other than the one side end connected to the power terminal is twisted. Therefore, the strength of the portion connected to the power terminal of the wire harness can be ensured, and the wire harness can be prevented from contacting the container or the rotor of the compressor.

Drawings

Fig. 1 is a circuit diagram of a refrigeration cycle apparatus according to embodiment 1.

Fig. 2 is a circuit diagram of the refrigeration cycle apparatus according to embodiment 1.

Fig. 3 is a longitudinal sectional view of the compressor according to embodiment 1.

Fig. 4 is a partial transverse sectional view of the compressor according to embodiment 1.

Fig. 5 is a side view of a stator of the motor according to embodiment 1.

Fig. 6 is a partially enlarged view of 3 wires of the motor according to embodiment 1.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals. In the description of the embodiments, the same or corresponding portions will be omitted or simplified as appropriate. The present invention is not limited to the embodiments described below, and various modifications can be made as necessary. For example, the embodiments described below may be partially implemented.

Embodiment mode 1

The present embodiment will be described with reference to fig. 1 to 6.

＊＊＊ description of Structure ＊＊＊

The configuration of the refrigeration cycle apparatus 10 according to the present embodiment will be described with reference to fig. 1 and 2.

Fig. 1 shows a refrigerant circuit 11 during cooling operation. Fig. 2 shows the refrigerant circuit 11 during heating operation.

The refrigeration cycle apparatus 10 is an air conditioner in the present embodiment, but may be an apparatus other than an air conditioner such as a refrigerator or a heat pump cycle apparatus.

The refrigeration cycle apparatus 10 includes a refrigerant circuit 11 through which a refrigerant circulates. The refrigeration cycle apparatus 10 further includes a compressor 12, a four-way valve 13, a 1 st heat exchanger 14 as an outdoor heat exchanger, an expansion mechanism 15 as an expansion valve, and a 2 nd heat exchanger 16 as an indoor heat exchanger. The compressor 12, the four-way valve 13, the 1 st heat exchanger 14, the expansion mechanism 15, and the 2 nd heat exchanger 16 are connected to the refrigerant circuit 11.

The compressor 12 compresses a refrigerant. The four-way valve 13 switches the direction of the refrigerant flow between the cooling operation and the heating operation. The 1 st heat exchanger 14 operates as a condenser during the cooling operation, and radiates heat from the refrigerant compressed by the compressor 12. That is, the 1 st heat exchanger 14 performs heat exchange using the refrigerant compressed by the compressor 12. The 1 st heat exchanger 14 operates as an evaporator during the heating operation, and heats the refrigerant by exchanging heat between the outdoor air and the refrigerant expanded in the expansion mechanism 15. The expansion mechanism 15 expands the refrigerant that has radiated heat in the condenser. The 2 nd heat exchanger 16 operates as a condenser during the heating operation, and dissipates heat from the refrigerant compressed by the compressor 12. That is, the 2 nd heat exchanger 16 performs heat exchange using the refrigerant compressed by the compressor 12. The 2 nd heat exchanger 16 operates as an evaporator during the cooling operation, and heats the refrigerant by exchanging heat between the indoor air and the refrigerant expanded in the expansion mechanism 15.

The refrigeration cycle apparatus 10 further includes a control device 17.

The control device 17 is, for example, a microcomputer. In fig. 1 and 2, only the connection between the control device 17 and the compressor 12 is shown, but the control device 17 may be connected not only to the compressor 12 but also to a component other than the compressor 12 connected to the refrigerant circuit 11. The control device 17 monitors and controls the state of each component connected to the control device 17.

As the refrigerant circulating through the refrigerant circuit 11, HFC-based refrigerants such as R32, R125, R134a, R407C, and R410A are used. Alternatively, HFO-based refrigerants such as R1123, R1132(E), R1132(Z), R1132a, R1141, R1234yf, R1234ze (E) or R1234ze (Z) are used. Alternatively, a natural refrigerant such as R290 (propane), R600a (isobutane), R744 (carbon dioxide), or R717 (ammonia) may be used. Or other refrigerants may be used. Or a mixture of two or more of these refrigerants may be used. "HFC" is an abbreviation for Hydrofluorocarbon. "HFO" is an abbreviation for hydrofluorooolefin.

The structure of the compressor 12 according to the present embodiment will be described with reference to fig. 3.

Fig. 3 shows a longitudinal section of the compressor 12.

The compressor 12 is a hermetic motor-driven compressor in the present embodiment. Specifically, the compressor 12 is a single-cylinder rotary compressor, but may be a multi-cylinder rotary compressor, a scroll compressor, or a reciprocating compressor.

The compressor 12 includes a container 20, a compression mechanism 30, a motor 40, and a crankshaft 50.

Specifically, the container 20 is a closed container. The refrigerator oil 25 is stored in the bottom of the container 20. A suction pipe 21 for sucking the refrigerant into the container 20 and a discharge pipe 22 for discharging the refrigerant to the outside of the container 20 are attached to the container 20.

The motor 40 is accommodated in the container 20. Specifically, the motor 40 is provided at an inner upper portion of the container 20.

The compression mechanism 30 is accommodated in the container 20. Specifically, the compression mechanism 30 is provided at the inner lower portion of the container 20. That is, the compression mechanism 30 is disposed below the motor 40 in the container 20.

The crankshaft 50 connects the motor 40 and the compression mechanism 30. The crankshaft 50 forms an oil supply path of the refrigerator oil 25 and a rotation shaft of the motor 40.

The refrigerating machine oil 25 is pumped up by an oil supply mechanism such as an oil pump provided at a lower portion of the crankshaft 50 in accordance with the rotation of the crankshaft 50. Then, the refrigerating machine oil 25 is supplied to each sliding portion of the compression mechanism 30, thereby lubricating each sliding portion of the compression mechanism 30. As the refrigerator oil 25, POE, PVE, AB, or the like is used as a synthetic oil. "POE" is an abbreviation for polyol ester. "PVE" is an abbreviation for Polyvinyl Ether (Polyvinyl Ether). "AB" is an abbreviation for Alkylbenzene (Alkylbenzene).

The motor 40 rotates the crank shaft 50. The compression mechanism 30 is driven by the rotation of the crankshaft 50, thereby compressing the refrigerant. That is, the compression mechanism 30 is driven by the rotational force of the motor 40 transmitted through the crank shaft 50, thereby compressing the refrigerant. Specifically, this refrigerant is a low-pressure gas refrigerant sucked into the suction pipe 21. The high-temperature and high-pressure gas refrigerant compressed by the compression mechanism 30 is discharged from the compression mechanism 30 into the space inside the container 20.

The crankshaft 50 includes an eccentric shaft 51, a main shaft 52, and an auxiliary shaft 53. The above portions are provided in the order of the main shaft portion 52, the eccentric shaft portion 51, and the auxiliary shaft portion 53 in the axial direction. That is, the main shaft portion 52 is provided on one axial end side of the eccentric shaft portion 51, and the sub shaft portion 53 is provided on the other axial end side of the eccentric shaft portion 51. The eccentric shaft 51, the main shaft 52, and the sub shaft 53 are each cylindrical. The main shaft portion 52 and the auxiliary shaft portion 53 are disposed so that their central axes coincide with each other, i.e., are disposed coaxially. The eccentric shaft portion 51 is provided with a central axis offset from the central axes of the main shaft portion 52 and the auxiliary shaft portion 53. When the main shaft portion 52 and the auxiliary shaft portion 53 rotate around the central axis, the eccentric shaft portion 51 eccentrically rotates.

The detailed structure of the container 20 will be described below.

The container 20 includes a main body 20a, a container upper portion 20b, and a container lower portion 20 c.

The body portion 20a is cylindrical. The container upper portion 20b closes the opening on the upper side of the body portion 20 a. The container upper portion 20b corresponds to one axial end of the container 20. The container lower portion 20c closes the opening on the lower side of the body portion 20 a. The container lower portion 20c corresponds to the other axial end of the container 20. The main body portion 20a and the container upper portion 20b are joined by welding, and the main body portion 20a and the container lower portion 20c are joined by welding, thereby sealing the container 20. The main body 20a is provided with a suction pipe 21 connected to a suction muffler 23. The container upper part 20b is provided with a discharge pipe 22.

A power terminal 24 and a lever 26 are attached to the container upper portion 20b, the power terminal 24 is connected to an external power source such as an inverter device, and a cover for protecting the power terminal 24 is attached to the lever 26. Specifically, the power supply terminal 24 is an airtight terminal such as a glass terminal. In the present embodiment, the power supply terminal 24 is fixed to the container 20 by welding.

A discharge pipe 22 having both ends open in the axial direction is also attached to the container upper portion 20 b. The discharge pipe 22 may be provided on the outer peripheral portion of the container upper portion 20b, but in the present embodiment, it is provided directly above the crank shaft 50 and is located in the central portion of the container upper portion 20 b. The outer diameter of the discharge pipe 22 is preferably 0.1 to 0.2 times the outer diameter of the vessel upper portion 20 b.

The detailed structure of the compression mechanism 30 will be described below with reference to fig. 3 and 4.

Fig. 4 shows a partial cross section of the compressor 12 viewed in the axial direction. In fig. 4, hatching for showing a cross section is omitted.

The compression mechanism 30 includes a cylinder block 31, a rocking piston 32, a main bearing 33, a sub-bearing 34, and a discharge muffler 35.

The inner periphery of the cylinder 31 is circular in plan view. A cylinder chamber 61 is formed inside the cylinder block 31, and the cylinder chamber 61 is a circular space in a plan view. A suction port for sucking gas refrigerant from the refrigerant circuit 11 is provided on the outer peripheral surface of the cylinder 31. The refrigerant sucked from the suction port is compressed in the cylinder chamber 61. The cylinder 31 is open at both axial ends.

The oscillating piston 32 is annular. Therefore, the inner and outer peripheries of the rocking piston 32 are circular in plan view. The oscillating piston 32 eccentrically rotates in the cylinder chamber 61. The oscillating piston 32 is slidably fitted to an eccentric shaft portion 51 of a crankshaft 50 serving as a rotation shaft of the oscillating piston 32.

The cylinder block 31 is provided with vane grooves 62 that extend in the radial direction and are connected to the cylinder chamber 61. A back pressure chamber 63 connected to the vane groove 62 is formed outside the vane groove 62, and the back pressure chamber 63 is a circular space in a plan view. In the vane groove 62, a vane 64 is provided for dividing the cylinder chamber 61 into a suction chamber and a compression chamber, the suction chamber being a low-pressure working chamber and the compression chamber being a high-pressure working chamber. The blade 64 is a plate with a curled front end. The vane 64 slides in the vane groove 62 and reciprocates. The vane 64 is constantly pressed against the rocking piston 32 by a vane spring provided in the back pressure chamber 63. Since the pressure in the tank 20 is high, when the operation of the compressor 12 is started, a force generated by a difference between the pressure in the tank 20 and the pressure in the cylinder chamber 61 acts on the vane back surface which is the back pressure chamber 63 side surface of the vane 64. Therefore, the vane spring is mainly used for the purpose of pressing the vane 64 against the oscillating piston 32 at the time of starting the compressor 12 when there is no pressure difference between the pressure in the tank 20 and the pressure in the cylinder chamber 61.

The main bearing 33 is an inverted T-shaped bearing in side view. The main bearing 33 is slidably fitted to a main shaft portion 52 which is a portion of the crankshaft 50 above the eccentric shaft portion 51. A through hole 54 serving as an oil supply passage is provided in the crankshaft 50 along the axial direction, and an oil film is formed between the main bearing 33 and the main shaft portion 52 by supplying the refrigerating machine oil 25 sucked up through the through hole 54. The main bearing 33 closes the upper side of the cylinder chamber 61 and the vane groove 62 of the cylinder block 31. That is, the main bearing 33 closes the upper sides of the two working chambers in the cylinder block 31.

The sub-bearing 34 is a T-shaped bearing in side view. The sub-bearing 34 is slidably fitted to a sub-shaft portion 53 which is a portion of the crank shaft 50 below the eccentric shaft portion 51. An oil film is formed by supplying the refrigerating machine oil 25 sucked up through the through hole 54 of the crankshaft 50 between the sub bearing 34 and the sub shaft portion 53. The sub-bearing 34 closes the lower side of the cylinder chamber 61 and the vane groove 62 of the cylinder block 31. That is, the sub-bearing 34 closes the lower sides of the two working chambers in the cylinder 31.

The main bearing 33 and the sub bearing 34 are fixed to the cylinder block 31 by fasteners 36 such as bolts, and support a crankshaft 50 as a rotation shaft of the oscillating piston 32. The main bearing 33 supports the main shaft portion 52 without contacting the main shaft portion 52 by fluid lubrication of an oil film between the main bearing 33 and the main shaft portion 52. The sub bearing 34 supports the sub shaft portion 53 without contacting the sub shaft portion 53 by fluid lubrication of an oil film between the sub bearing 34 and the sub shaft portion 53, similarly to the main bearing 33.

Although not shown, the main bearing 33 is provided with a discharge port for discharging the refrigerant compressed in the cylinder chamber 61 to the refrigerant circuit 11. The discharge port is located at a position connected to the compression chamber in a case where the cylinder chamber 61 is partitioned into the suction chamber and the compression chamber by the vane 64. A discharge valve that openably closes a discharge port is attached to the main bearing 33. The discharge valve is in a closed state until the gas refrigerant in the compression chamber reaches a desired pressure, and is referred to as an open state when the gas refrigerant in the compression chamber reaches the desired pressure. Thereby, the discharge timing of the gas refrigerant from the cylinder 31 is controlled.

The discharge muffler 35 is mounted on the outer side of the main bearing 33. The high-temperature and high-pressure gas refrigerant discharged when the discharge valve is opened temporarily enters the discharge muffler 35, and is thereafter discharged from the discharge muffler 35 into the space in the container 20.

The discharge port and the discharge valve may be provided in the sub-bearing 34 or both the main bearing 33 and the sub-bearing 34. The discharge muffler 35 is mounted on the outside of the bearing provided with the discharge port and the discharge valve.

A suction muffler 23 is provided beside the container 20. The suction muffler 23 sucks low-pressure gas refrigerant from the refrigerant circuit 11. The suction muffler 23 suppresses direct entry of the liquid refrigerant into the cylinder chamber 61 of the cylinder block 31 in the case where the liquid refrigerant is returned. Suction muffler 23 is connected to a suction port provided on the outer peripheral surface of cylinder 31 via suction pipe 21. The suction port is located at a position connected to the suction chamber in a case where the cylinder chamber 61 is partitioned into the suction chamber and the compression chamber by the vane 64. The main body of suction muffler 23 is fixed to the side surface of main body 20a of container 20 by welding or the like.

The eccentric shaft 51, the main shaft 52, and the sub shaft 53 of the crankshaft 50 are made of a cast material or a forged material. The material of the main bearing 33 and the sub bearing 34 is a cast material or a sintered material, specifically, sintered steel, gray cast iron, or carbon steel. The cylinder 31 is also made of sintered steel, gray cast iron, or carbon steel. The material of the rocking piston 32 is a cast material, specifically, an alloy steel containing molybdenum, nickel, and chromium, or an iron-based cast material. The blade 64 is made of high speed tool steel.

Although not shown, in the case where the compressor 12 is configured as a rotary compressor of a swing type, the vane 64 is provided integrally with the swing piston 32. When the crankshaft 50 is driven, the vane 64 reciprocates along a groove of a support body rotatably attached to the oscillating piston 32. The vane 64 swings and advances and retreats in the radial direction with the rotation of the swing piston 32, thereby dividing the inside of the cylinder chamber 61 into a compression chamber and a suction chamber. The support body is composed of two columnar members having a semicircular cross section. The support body is rotatably fitted into a circular holding hole formed in the middle of the suction port and the discharge port of the cylinder 31.

The detailed structure of the motor 40 will be described below.

The motor 40 is an induction motor in the present embodiment, but may be a motor other than an induction motor such as a brushless DC motor. "DC" is an abbreviation for Direct Current.

The motor 40 includes a stator 41 and a rotor 42.

The stator 41 is cylindrical and fixed in contact with the inner circumferential surface of the container 20. The rotor 42 is cylindrical and is provided inside the stator 41 with a gap therebetween. The width of the gap is, for example, 0.3mm or more and 1.0mm or less.

The stator 41 includes a stator core 43, a coil 44, and a harness 45.

A plurality of electromagnetic steel sheets mainly composed of iron are punched out into a predetermined shape, stacked in the axial direction, and fixed by caulking to manufacture the stator core 43. The thickness of each electromagnetic steel sheet is, for example, 0.1mm to 1.5 mm. The stator core 43 has an outer diameter larger than an inner diameter of the body portion 20a of the container 20, and is fixed to the inside of the body portion 20a of the container 20 by shrink fitting.

The method of fixing the electromagnetic steel plates of the stator core 43 to each other is not limited to caulking, and other methods such as welding may be used. The method of fixing the stator core 43 to the inside of the body portion 20a of the container 20 is not limited to the shrink fit, and other methods such as press fitting and welding may be used.

The coil 44 is wound around the stator core 43. Specifically, the coil 44 is wound around a tooth portion formed on the stator core 43 via an insulating member. The coil 44 is composed of a core wire and at least one layer of coating film covering the core wire. The coil 44 is electrically connected to the power supply terminal 24 through a wire harness 45. In the present embodiment, the material of the core wire is copper. The material of the coating is AI/EI. "AI" is an abbreviation for Amide-Imide. "EI" is an abbreviation for Ester-Imide. The insulating member is made of PET. "PET" is an abbreviation for Polyethylene terphtalate (Polyethylene Terephthalate).

The core wire may be made of aluminum. The insulating member may be made of PBT, FEP, PFA, PTFE, LCP, PPS, or phenol resin. "PBT" is an abbreviation for Polybutylene Terephthalate. "FEP" is an abbreviation for Fluorinated Ethylene Propylene. "PFA" is an abbreviation for Perfluoroakoxy Alkane (fusible polytetrafluoroethylene). "PTFE" is an abbreviation for Polytetrafluoethylene (Polytetrafluoroethylene). "LCP" is an abbreviation for Liquid Crystal Polymer (Liquid Crystal Polymer). "PPS" is an abbreviation for Polyphenylene Sulfide (PPS).

The wire harness 45 is formed by bundling two or more wires. One end of the wire harness 45 is electrically connected to the coil 44. The other end of the wire harness 45 is electrically connected to the power supply terminal 24. The wires of the wire harness 45 may be separate wires from the coil 44, but in the present embodiment, the wires are integrated with the coil 44. That is, each wire of the harness 45 may be connected to the coil 44 via a connection terminal, but in the present embodiment, the wire is formed by directly drawing out an end portion of the coil 44. Therefore, each wire of the wire harness 45 is composed of a core wire and at least one coating covering the core wire, as in the case of the coil 44.

In the present embodiment, as shown in fig. 5, the wire harness 45 is formed by bundling 3 wires, i.e., the 1 st lead wire 71, the 2 nd lead wire 72, and the 3 rd lead wire 73. The 3 wires are different in potential from each other. Therefore, in order to ensure insulation, it is preferable that at least 2 wires are covered with the insulating tube 74. The 1 st lead line 71 is a common line lead line. The 2 nd lead line 72 is a lead line of the main coil. The 3 rd lead wire 73 is a lead wire of the auxiliary coil.

The 1 st lead wire 71, the 2 nd lead wire 72, and the 3 rd lead wire 73 are formed by directly drawing out the ends of the coil 44, respectively. That is, in the present embodiment, one end of the wire harness 45 is formed integrally with the coil 44. The 1 st lead wire 71, the 2 nd lead wire 72, and the 3 rd lead wire 73 are swaged to the crimp terminals, respectively. Specifically, as shown in fig. 6, the leading ends of the 1 st lead wire 71, the 2 nd lead wire 72, and the 3 rd lead wire 73 are caulked to the 1 st crimp terminal 81, the 2 nd crimp terminal 82, and the 3 rd crimp terminal 83, respectively. That is, in the present embodiment, the other end of the harness 45 is electrically connected to the power supply terminal 24 via the crimp terminal.

The 1 st crimp terminal 81, the 2 nd crimp terminal 82, and the 3 rd crimp terminal 83 are inserted into the cluster head 46, and the cluster head 46 is a block-shaped molded member made of resin such as PBT. Therefore, by simply connecting the cluster head 46 to the power supply terminal 24, all the crimp terminals can be connected to the power supply terminal 24, and the wiring workability can be improved.

A plurality of notches may be formed at equal intervals in the circumferential direction on the outer periphery of the stator core 43. Each of the slits is a passage for the gas refrigerant discharged from the discharge muffler 35 to the space inside the container 20. Each cutout also serves as a passage for the refrigerating machine oil 25 guided to the upper portion of the container 20 to fall toward the lower portion of the container 20.

The rotor 42 is a cage rotor of aluminium die cast.

The rotor 42 includes a rotor core 47, a conductor not shown, and an end ring 48.

The rotor core 47 is manufactured by punching a plurality of electromagnetic steel sheets mainly composed of iron into a predetermined shape, laminating the electromagnetic steel sheets in the axial direction, and fixing the laminated electromagnetic steel sheets by caulking, similarly to the stator core 43. The thickness of each electromagnetic steel sheet is, for example, 0.1mm to 1.5 mm.

The method of fixing the electromagnetic steel plates of the rotor core 47 to each other is not limited to caulking, and other methods such as welding may be used.

The conductor is formed of aluminum in the present embodiment, but may be formed of copper or the like. The conductors are filled or inserted into a plurality of slots formed in the rotor core 47.

End rings 48 short circuit the two ends of the conductor. Thereby, a cage coil is formed.

A shaft hole into which the main shaft portion 52 of the crankshaft 50 is press-fitted or press-fitted is formed at the center of the rotor core 47 in a plan view. That is, the inner diameter of the rotor core 47 is smaller than the outer diameter of the main shaft portion 52. Although not shown, a plurality of through holes penetrating in the axial direction are formed around the shaft hole of the rotor core 47. Each through hole is a passage for the gas refrigerant discharged from the discharge muffler 35 to the space in the container 20. Each through hole also serves as a passage for the refrigerating machine oil 25 guided to the upper portion of the container 20 to drop toward the lower portion of the container 20.

When the electric motor 40 is a brushless DC motor, permanent magnets are inserted into a plurality of insertion holes formed in the rotor core 47, although not shown. The permanent magnet forms a magnetic pole. As the permanent magnet, a ferrite magnet or a rare-earth magnet is used. In order to prevent the permanent magnets from falling off in the axial direction, an upper end plate and a lower end plate are provided at both ends of the rotor 42 in the axial direction. The upper end plate and the lower end plate are used as rotary weight pieces. The upper end plate and the lower end plate are fixed to the rotor core 47 by a plurality of fixing rivets or the like.

＊＊＊ description of actions ＊＊＊

The operation of the compressor 12 according to the present embodiment will be described with reference to fig. 3 and 4. The operation of the compressor 12 corresponds to the refrigerant compression method according to the present embodiment.

Electric power is supplied from the power supply terminal 24 to the stator 41 of the motor 40 via the harness 45. Thereby, a current flows to the coil 44 of the stator 41, and a magnetic flux is generated from the coil 44. The rotor 42 of the motor 40 rotates by the action of magnetic flux generated from the coil 44 and magnetic flux generated from the cage coil of the rotor 42. By the rotation of the rotor 42, the crank shaft 50 fixed to the rotor 42 rotates. As the crankshaft 50 rotates, the oscillating piston 32 of the compression mechanism 30 eccentrically rotates in the cylinder chamber 61 of the cylinder block 31 of the compression mechanism 30. The cylinder chamber 61, which is a space between the cylinder block 31 and the oscillating piston 32, is divided into a suction chamber and a compression chamber by the vane 64. The volume of the suction chamber and the volume of the compression chamber change with the rotation of the crankshaft 50. In the suction chamber, the volume is gradually enlarged, whereby low-pressure gas refrigerant is sucked from the suction muffler 23 through the suction pipe 21. In the compression chamber, the volume is gradually reduced, thereby compressing the gas refrigerant therein. The compressed high-pressure and high-temperature gas refrigerant is discharged from discharge muffler 35 into the space inside container 20. The discharged gas refrigerant is further discharged from discharge pipe 22 located in container upper portion 20b to the outside of container 20 by motor 40. The refrigerant discharged to the outside of the container 20 passes through the refrigerant circuit 11 and returns to the suction muffler 23 again.

＊＊＊ detailed description of the structure ＊＊＊

The structure of the compressor 12 according to the present embodiment will be described in detail with reference to fig. 3, 5, and 6.

As described above, the wire harness 45 of the stator 41 is formed by bundling 3 wires of the 1 st lead wire 71, the 2 nd lead wire 72, and the 3 rd lead wire 73. One end of the wire harness 45 is electrically connected to the coil 44. The other end of the wire harness 45 is electrically connected to the power supply terminal 24. As shown in fig. 5, at least a part of the portion of the wire harness 45 other than the other end is twisted.

As described above, the 1 st lead wire 71, the 2 nd lead wire 72, and the 3 rd lead wire 73 of the wire harness 45 are formed by directly drawing the ends of the coil 44, respectively. As shown in fig. 5, the portion of the wire harness 45 from the lead wire fixing position P1 to the lead wire intermediate position P2 is twisted. The twisting direction may be clockwise or counterclockwise. The number of twist rotations may be any number of rotations.

As described above, the 1 st lead wire 71, the 2 nd lead wire 72, and the 3 rd lead wire 73 of the wire harness 45 are caulked to the 1 st crimp terminal 81, the 2 nd crimp terminal 82, and the 3 rd crimp terminal 83, respectively. The 1 st crimp terminal 81, the 2 nd crimp terminal 82, and the 3 rd crimp terminal 83 are housed inside the cluster head 46.

As shown in fig. 6, the 1 st lead wire 71 extends straight in the direction of the coil 44 from the 1 st terminal caulking portion 91, which is a portion caulked to the 1 st crimp terminal 81. The 2 nd lead wire 72 extends straight in the direction of the coil 44 from the 2 nd terminal caulking portion 92 which is a portion caulked to the 2 nd crimp terminal 82. The 3 rd lead wire 73 extends straight in the direction of the coil 44 from the 3 rd terminal caulking portion 93 which is a portion caulked to the 3 rd crimp terminal 83. The 1 st lead wire 71, the 2 nd lead wire 72, and the 3 rd lead wire 73 preferably extend straight 15mm or more in the direction of the coil 44 from the 1 st terminal caulking portion 91, the 2 nd terminal caulking portion 92, and the 3 rd terminal caulking portion 93, respectively.

＊＊＊ description of effects of embodiment ＊＊＊

In the present embodiment, at least a part of the portion of the wire harness 45 that electrically connects the coil 44 of the motor 40 to the power terminal 24 of the compressor 12, excluding the end portion on the side connected to the power terminal 24, is twisted. Therefore, the strength of the portion of the wire harness 45 connected to the power supply terminal 24 can be ensured, and the wire harness 45 can be prevented from contacting the container 20 or the rotor 42 of the compressor 12.

In the present embodiment, the lead wires of the wire bundle 45 are less likely to be scattered and the arrangement of the lead wires is facilitated by twisting the wire bundle 45 from the lead wire fixing position P1 to the lead wire intermediate position P2. As a result, workability of the process of connecting the cluster joint 46 to the power supply terminal 24 is improved, and contact between the lead wires and the container 20 or the rotor 42 of the compressor 12 can be reliably avoided. Further, since the portion where the lead wire and the crimp terminal are caulked is not twisted, the tensile strength and the bending strength of the portion can be sufficiently ensured.

In the present embodiment, the wiring is performed in the following order: an end portion of the coil 44 of the motor 40 is directly drawn out as a lead wire, a crimp terminal for connection to the power terminal 24 and an insulating tube 74 covering the drawn-out portion are attached to a tip end of the lead wire, the lead wire is twisted from a lead wire fixing position P1 to a lead wire intermediate position P2, and then the crimp terminal is connected to the power terminal 24. The portion of the crimp terminal swaged tightly to the lead wire is not twisted but is straight, so that the tensile strength and the bending strength of the portion can be sufficiently secured, and the lead wire can be prevented from contacting the container 20 or the rotor 42 of the compressor 12 at the time of wire connection. Therefore, workability of wiring and reliability of the compressor 12 are both improved.

The 1 st lead wire 71, the 2 nd lead wire 72, and the 3 rd lead wire 73 may be all single wires or may be all multiple wires.

The lead wires of the coil 44 and the wire harness 45 may be either copper wires or aluminum wires. That is, each lead wire of the wire harness 45 is a copper wire in the present embodiment, but at least 1 lead wire may be an aluminum wire, or all lead wires may be aluminum wires. Aluminum wires are softer and weaker in tensile strength and bending strength than copper wires, and therefore, it is effective to apply this embodiment.

＊＊＊ other Structure ＊＊＊

In the present embodiment, the body portion 20a and the container lower portion 20c of the container 20 are connected by welding, but as a modification, the body portion 20a and the container lower portion 20c of the container 20 may be integrally molded.

Description of the reference numerals

10 … refrigeration cycle device; 11 … refrigerant circuit; 12 … compressor; 13 … four-way valve; 14 … heat exchanger 1; 15 … expansion mechanism; 16 … heat exchanger No. 2; 17 … control device; 20 … container; 20a … body portion; 20b … container upper portion; 20c … container lower portion; 21 … suction tube; 22 … discharge pipe; 23 … suction muffler; 24 … power terminals; 25 … refrigerator oil; 26 … rod; 30 … compression mechanism; 31 … cylinders; 32 … wobble piston; 33 … main bearing; 34 … secondary bearing; 35 … discharge muffler; 36 … fastener; a 40 … electric motor; 41 … stator; 42 … rotor; 43 … stator core; 44 … coil; 45 … wire harness; 46 … bundling joint; 47 … rotor core; 48 … end rings; 50 … crankshaft; 51 … eccentric shaft portion; 52 … a main shaft portion; 53 … minor shaft portion; 54 … through holes; 61 … cylinder chamber; 62 … vane slot; 63 … back pressure chamber; 64 … blade; 71 …, 1 st lead-out line; 72 …, 2 nd lead; 73 rd 3 lead wire 73 …; 74 … insulating tube; 81 … 1 st crimp terminal; 82 … No. 2 crimp terminal; 83 … No. 3 crimp terminal; 91 … 1 st terminal calking part; 92 … terminal 2 caulking portion; 93 … terminal 3 caulking part; p1 … outlet wire fixing location; p2 … leads to the middle position.

Claims

1. An electric motor for use accommodated in a container of a compressor,

the motor includes:

a coil; and

and a wire harness formed by bundling two or more wires, one end of the wire harness being electrically connected to the coil and the other end of the wire harness being electrically connected to a power supply terminal of the compressor, wherein at least a part of a portion of the wire harness other than the other end of the wire harness is twisted.

2. The motor according to claim 1,

each wire of the wire harness is formed by directly drawing out an end of the coil,

the one end of the wire harness is integrated with the coil.

3. The motor according to claim 1 or 2,

the respective wires of the wire harness are caulked to the crimp terminal,

the other end of the wire harness is electrically connected to the power supply terminal via the crimp terminal.

4. The motor according to claim 3,

each wire of the wire bundle extends straight in the direction of the coil from a portion caulked to the crimp terminal, and is twisted from the middle.

5. The motor according to claim 4,

each wire of the wire bundle extends straight by 15mm or more from a portion caulked to the crimp terminal.

6. The motor according to any one of claims 1 to 5,

each wire of the wire bundle is a copper wire.

7. The motor according to any one of claims 1 to 5,

at least 1 wire of the wire bundle is an aluminum wire.

8. The motor according to any one of claims 1 to 5,

each wire of the wire bundle is an aluminum wire.

9. A compressor, characterized in that,

the compressor is provided with:

the motor of any one of claims 1 to 8;

a compression mechanism driven by the motor and compressing a refrigerant;

a container that houses the motor and the compression mechanism; and

and a power supply terminal fixed to the container and electrically connected to the other end of the wire harness.

10. A refrigeration cycle apparatus, characterized in that,

a compressor according to claim 9 is provided.