WO2021229742A1

WO2021229742A1 - Electric motor, compressor, and refrigeration cycle device

Info

Publication number: WO2021229742A1
Application number: PCT/JP2020/019233
Authority: WO
Inventors: 真史大野
Original assignee: 三菱電機株式会社
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2021-11-18

Abstract

This electric motor has: a stator core; a winding wound around the stator core; and one or a plurality of lead wires extending from the winding and electrically connected to a power supply terminal. At least one lead wire has: an electric wire single body comprising one electric wire; and an electric wire aggregate in which adjacent two electric wires are electrically connected to each other by a first crimp terminal. Either one of the electric wires of the electric wire aggregate is led out from the electric wire aggregate and electrically connected to the electric wire single body by a second crimp terminal. The second crimp terminal is electrically connected to the power supply terminal.

Description

Motors, compressors and refrigeration cycle equipment

This disclosure relates to motors, compressors and refrigeration cycle devices.

Conventionally, it is known that a compressor has a configuration in which an electric motor, a rotating shaft that transmits the driving force of the electric motor, and a compression mechanism unit that compresses the refrigerant by the driving force transmitted from the rotating shaft are housed in a closed container. Has been done. The closed container is provided with a power supply terminal for connecting to an external power source such as an inverter device. The electric motor has an annular stator and a rotor rotatably provided facing the inner surface of the stator. The stator includes a stator core and windings wound around the stator core. The electric motor has a configuration in which electric power is supplied from the power supply terminal to the stator and the rotor rotates by connecting the lead wire extending from the winding to the power supply terminal.

For example, in Patent Document 1, an external terminal is crimped and crimped to the tip of a lead wire formed by extending from an end of a winding, and power is supplied from a power source between nuts fitted to the external terminal. Power is supplied to the stator by sandwiching and fixing the connection terminals of the wiring.

Japanese Unexamined Patent Publication No. 2012-036733

As disclosed in Patent Document 1, it is generally known that the crimp terminal is crimped to the tip of the lead wire extending from the end of the winding. However, the electric wire constituting the lead wire is soft and easily deformed. Therefore, when the lead wire has three or more electric wires and the electric wires are crimped by one crimp terminal, there is a possibility that the electric wires are crimped to the crimp terminal in a crossed state. If the crimp terminals are crimped with the wires crossed, the wires may press against each other and break. Further, if the lead wire is pulled when the crimp terminal is connected to the power supply terminal, the crossed electric wire may be broken due to the pulled impact. In a compressor, if the electric wire is broken, an electrical connection failure will occur.

This disclosure is made in order to solve the above-mentioned problems, and even when the lead wire is composed of three or more electric wires, it is possible to avoid an electrical connection failure. It is an object of the present invention to provide a highly reliable electric motor, compressor and refrigeration cycle device.

The electric wire according to the present disclosure is an electric wire housed in a container of a compressor having a power supply terminal and used, and is an electric wire, a stator core, a winding wound around the stator core, and an electric wire extending from the winding. The power supply terminal has one or a plurality of outlet wires electrically connected to the power supply terminal, and at least one of the outlet wires is a single electric wire composed of one electric wire and two adjacent electric wires. It has an electric wire assembly in which the electric wires are electrically connected by the first crimp terminal, and one of the electric wires of the electric wire assembly is drawn out from the electric wire assembly, and the electric wire alone and the second electric wire assembly are provided. It is electrically connected by a crimp terminal, and the second crimp terminal is electrically connected to the power supply terminal.

The compressor according to the present disclosure is fixed to the electric motor, a compression mechanism portion driven by the electric motor to compress the refrigerant, a closed container accommodating the electric motor and the compression mechanism portion, and the closed container. It is equipped with a power supply terminal to which the outlet wire is electrically connected.

In the refrigeration cycle device according to the present disclosure, the compressor, the flow path switching device, the first heat exchanger, the expansion mechanism, and the second heat exchanger are sequentially connected by pipes to circulate the refrigerant. It is equipped with a refrigerant circuit.

According to the motor, compressor and refrigeration cycle device of the present disclosure, even if the lead wire is composed of three or more electric wires, the electric wires are electrically connected by two crimp terminals. When crimping an electric wire with a crimp terminal, it is possible to suppress a situation in which the electric wires cross each other and press each other, and it is possible to avoid an electrical connection failure.

It is a refrigerant circuit diagram at the time of cooling operation of the refrigeration cycle apparatus which concerns on Embodiment 1. It is a refrigerant circuit diagram at the time of heating operation of the refrigeration cycle apparatus which concerns on Embodiment 1. It is a vertical sectional view which showed the internal structure of the compressor which concerns on Embodiment 1. It is explanatory drawing which showed the structure of the electric wire bundle which is the electric motor which concerns on Embodiment 1. It is sectional drawing which showed the main part of the compression mechanism part of the compressor which concerns on Embodiment 1. It is explanatory drawing which showed the structure of the outlet wire which is the electric motor which concerns on Embodiment 1. It is explanatory drawing which showed the structure of the outlet wire which is the electric motor which concerns on Embodiment 2.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each figure, the same or corresponding parts are designated by the same reference numerals, and the description thereof will be omitted or simplified as appropriate. In addition, the shape, size, arrangement, and the like of the configurations shown in each figure can be appropriately changed.

Embodiment 1.
FIG. 1 is a refrigerant circuit diagram during a cooling operation of the refrigeration cycle device according to the first embodiment. FIG. 2 is a refrigerant circuit diagram during a heating operation of the refrigeration cycle apparatus according to the first embodiment. The refrigerating cycle device 100 according to the first embodiment is used for, for example, an air conditioner, a refrigerating device, a refrigerator, a freezer, a vending machine, a hot water supply device, or the like. In the refrigeration cycle device 100 according to the first embodiment, the compressor 101, the flow path switching device 102, the first heat exchanger 103, the expansion mechanism 104, and the second heat exchanger 105 are sequentially connected by a refrigerant pipe. It has a refrigerant circuit 200 in which the refrigerant circulates. Further, the refrigeration cycle device 100 has a control unit 106, and the state of each component is monitored and controlled by the control unit 106.

The compressor 101 compresses the sucked refrigerant and discharges it in a high temperature and high pressure state. The flow path switching device 102 is, for example, a four-way valve, and has a function of switching the flow path of the refrigerant. The flow path switching device 102 connects the refrigerant discharge side of the compressor 101 and the gas side of the first heat exchanger 103, which is an outdoor heat exchanger, during the cooling operation shown in FIG. 1, and also connects the refrigerant of the compressor 101. The refrigerant flow path is switched so as to connect the suction side and the gas side of the second heat exchanger 105, which is an indoor heat exchanger. On the other hand, the flow path switching device 102 connects the refrigerant discharge side of the compressor 101 and the gas side of the second heat exchanger 105, which is an indoor heat exchanger, during the heating operation shown in FIG. 2, and also connects the compressor 101. The refrigerant flow path is switched so as to connect the refrigerant suction side of the above and the gas side of the first heat exchanger 103 which is an outdoor heat exchanger. The flow path switching device 102 may be configured by combining a two-way valve or a three-way valve.

The first heat exchanger 103 functions as a condenser during the cooling operation, and causes heat exchange between the refrigerant discharged from the compressor 101 and the air. Further, the first heat exchanger 103 functions as an evaporator during the heating operation, and causes heat exchange between the refrigerant flowing out from the expansion mechanism 104 and the air. The first heat exchanger 103 sucks in outdoor air by a blower and discharges the air that has exchanged heat with the refrigerant to the outside.

The expansion mechanism 104 decompresses and expands the refrigerant flowing in the refrigerant circuit, and is composed of an electronic expansion valve whose opening degree is variably controlled as an example.

The second heat exchanger 105 functions as an evaporator during the cooling operation, and causes heat exchange between the refrigerant flowing out from the expansion mechanism 104 and the air. Further, the second heat exchanger 105 functions as a condenser during the heating operation, and causes heat exchange between the refrigerant discharged from the compressor 101 and the air. The second heat exchanger 105 sucks indoor air by a blower and supplies the air exchanged with the refrigerant into the room.

The control unit 106 is composed of an arithmetic unit such as a microcomputer or a CPU and software executed on the arithmetic unit. The control unit 106 may be configured by hardware such as a circuit device that realizes the function. Although the control unit 106 is connected to the compressor 101 as shown in FIGS. 1 and 2, the control unit 106 may be connected to other components.

As the refrigerant circulating in the refrigerant circuit 200, HFC-based refrigerants such as R32, R125, R134a, R407C or 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) is used. Alternatively, other refrigerants are used. Alternatively, a mixture of two or more of these refrigerants is used. "HFC" is an abbreviation for Hydrofluorocarbon. "HFO" is an abbreviation for Hydrofluoroolefin.

Next, the operation of the refrigeration cycle device 100 during the cooling operation will be described with reference to FIG. The high-temperature and high-pressure gas refrigerant discharged from the compressor 101 passes through the flow path switching device 102, flows to the first heat exchanger 103, exchanges heat with air, and becomes a condensed liquid. The condensed liquefied refrigerant is decompressed by the expansion mechanism 104 to become a low-pressure gas-liquid two-phase refrigerant, which flows to the second heat exchanger 105 and exchanges heat with air to gasify. The gasified refrigerant passes through the flow path switching device 102 and is sucked into the compressor 101.

Next, the operation of the refrigeration cycle device 100 during the heating operation will be described with reference to FIG. The high-temperature and high-pressure gas refrigerant discharged from the compressor 101 passes through the flow path switching device 102, flows to the second heat exchanger 105, and exchanges heat with air to form a condensed liquid. The condensed liquefied refrigerant is decompressed by the expansion mechanism 104 to become a low-pressure gas-liquid two-phase refrigerant, which flows to the first heat exchanger 103 and exchanges heat with air to gasify. The gasified refrigerant passes through the flow path switching device 102 and is sucked into the compressor 101.

Next, the configuration of the compressor 101 will be specifically described with reference to FIGS. 3 to 5. FIG. 3 is a vertical sectional view showing the internal structure of the compressor according to the first embodiment. FIG. 4 is an explanatory diagram showing the configuration of an electric wire bundle in the electric motor according to the first embodiment. FIG. 5 is a cross-sectional view showing a main part of the compression mechanism portion of the compressor according to the first embodiment.

The compressor 101 shown in FIG. 3 is a single-cylinder rotary compressor as an example. The compressor 101 may be, for example, a multi-cylinder rotary compressor, a scroll compressor, or a reciprocating compressor, or may have another structure.

As shown in FIG. 3, the compressor 101 uses a closed container 1 forming an outer shell, an electric motor 2, a crank shaft 3 for transmitting the driving force of the electric motor 2, and a driving force transmitted from the crank shaft 3 to supply a refrigerant. It includes a compression mechanism unit 4 for compressing. An electric motor 2, a crank shaft 3, and a compression mechanism portion 4 are housed inside the closed container 1. The electric motor 2 is installed on the upper part of the closed container 1. The compression mechanism portion 4 is installed below the electric motor 2 and below the closed container 1. The electric motor 2 and the compression mechanism portion 4 are connected via a crank shaft 3.

The closed container 1 has a cylindrical body portion 1a, a container upper portion 1b that closes the upper surface opening of the body portion 1a, and a container lower portion 1c that closes the lower surface opening of the body portion 1a. The upper part 1b of the container and the lower part 1c of the container are each fixed to the body portion 1a by welding or the like. The upper part 1b of the container corresponds to one end in the axial direction of the closed container 1. The lower part 1c of the container corresponds to the other end in the axial direction of the closed container 1. The closed container 1 may have a structure in which the body portion 1a and the container lower portion 1c are integrally molded.

The closed container 1 is connected to the suction muffler 107 via the suction pipe 10, and the refrigerant gas is taken in from the suction muffler 107. The suction muffler 107 is provided to separate the low-pressure refrigerant sucked from the refrigerant circuit 200 into a liquid refrigerant and a gas refrigerant so that the liquid refrigerant is not sucked into the compression mechanism portion 4 as much as possible. The suction muffler 107 is fixed to the outer surface of the body portion 1a of the closed container 1 by welding or the like.

A discharge pipe 11 for discharging the compressed refrigerant is connected to the upper portion 1b of the container. In the case of the illustrated example, the discharge pipe 11 is directly above the crank shaft 3 and is installed in the central portion of the container upper portion 1b, but may be another portion of the container upper portion 1b. It is desirable that the outer diameter of the discharge pipe 11 is 0.1 times or more and 0.2 times or less the outer diameter of the upper portion 1b of the container. Further, the upper portion 1b of the container is provided with a power supply terminal 12 connected to an external power source such as an inverter device and a rod 13 to which a cover for protecting the power supply terminal 12 is attached. The power supply terminal 12 is an airtight terminal such as a glass terminal. The power supply terminal 12 is fixed to the closed container 1 by welding, for example.

Refrigerating machine oil 14 is stored in the bottom of the closed container 1. The refrigerating machine oil 14 is mainly supplied to each sliding portion of the compression mechanism portion 4 and lubricates each sliding portion. As the refrigerating machine oil 14, synthetic oils such as POE, PVE, and AB are used. "POE" is an abbreviation for Polyolester. "PVE" is an abbreviation for Polyvinyl Ether. "AB" is an abbreviation for Alkylbenzene.

The electric motor 2 rotates the crank shaft 3. The electric motor 2 is an induction motor as an example, but may be other than an induction motor such as a brushless DC motor. DC is an abbreviation for "Direct Current".

As shown in FIG. 1, the electric motor 2 has an annular stator 20 fixed to the inner wall surface of the closed container 1 by shrink fitting or the like, and a rotatably provided rotatably provided facing the inner side surface of the stator 20. It has a child 21 and.

The stator 20 has a stator core 22, a winding 23, and a wire bundle 24. The stator core 22 is manufactured by punching a plurality of electrical steel sheets containing iron as a main component into a certain shape, laminating them in the axial direction, and fixing them by caulking. The thickness of each electrical steel sheet is, for example, 0.1 mm or more and 1.5 mm or less. The stator core 22 has an outer diameter larger than the inner diameter of the body portion 1a of the closed container 1 and is fixed to the inside of the body portion 1a of the closed container 1 by shrink fitting.

The method of fixing the electromagnetic steel sheets of the stator core 22 is not limited to caulking, but may be another method such as welding. Further, the method of fixing the stator core 22 to the inside of the body portion 1a of the closed container 1 is not limited to shrink fitting, and other methods such as press fitting or welding may be used.

A plurality of notches may be formed at equal intervals in the circumferential direction on the outer circumference of the stator core 22. Each notch becomes one of the passages of the gas refrigerant discharged from the discharge muffler 44 into the internal space of the closed container 1. Each notch also serves as one of the passages for dropping the refrigerating machine oil 14 guided to the upper part of the closed container 1 to the lower part of the closed container 1.

The winding 23 is wound around the stator core 22. Specifically, the winding 23 is wound around a tooth formed on the stator core 22 via an insulating member. The winding 23 is composed of a core wire and at least one layer of insulating coating covering the core wire. The winding 23 is electrically connected to the power supply terminal 12 by a wire bundle 24. The material of the core wire is copper as an example. The material of the coating is AI / EI. "AI" is an abbreviation for Amide-Imide. "EI" is an abbreviation for Ester-Imide. The material of the insulating member is PET. "PET" is an abbreviation for Polyethylene terephthalate.

The material of the core wire may be aluminum. The material of the insulating member may be PBT, FEP, PFA, PTFE, LCP, PPS or phenol resin. "PBT" is an abbreviation for Polybutylene terephlate. "FEP" is an abbreviation for Fluorinated Ethylene Propyrene. "PFA" is an abbreviation for Perfluoroalkoxy Alkane. "PTFE" is an abbreviation for Polytellafluoethylene. "LCP" is an abbreviation for Liquid Crystal Polymer. "PPS" is an abbreviation for Polyphenylene Sulfide.

One end of the wire bundle 24 is electrically connected to the winding 23. The other end of the wire bundle 24 is electrically connected to the power supply terminal 12. As shown in FIG. 4, the electric wire bundle 24 has a first outlet wire 5, a second outlet wire 6, and a third outlet wire 7. The first outlet line 5 is a common outlet line. The second outlet wire 6 is the outlet wire of the main winding. The third outlet wire 7 is an outlet wire of the auxiliary winding.

The first outlet wire 5, the second outlet wire 6 and the third outlet wire 7 are composed of, for example, a copper wire or an electric wire made of aluminum. The first outlet wire 5, the second outlet wire 6 and the third outlet wire 7 may be all made of copper wire or all may be made of aluminum wire. Further, at least one of the first outlet wire 5, the second outlet wire 6 and the third outlet wire 7 is made of an aluminum wire, and the other outlet wires are made of copper wire. You may.

The potentials of the first outlet wire 5, the second outlet wire 6 and the third outlet wire 7 are different from each other. Therefore, it is desirable that at least two of the first outlet wire 5, the second outlet wire 6, and the third outlet wire 7 are covered with an insulating tube to ensure mutual insulation.

Each of the first outlet wire 5, the second outlet wire 6 and the third outlet wire 7 is an electric wire integrated with the winding 23, and the end portion of the winding 23 is directly pulled out to form the electric wire. There is. Therefore, each electric wire of the electric wire bundle 24 is composed of a core wire and at least one layer of an insulating coating covering the core wire, similarly to the winding 23. In addition, each electric wire of the 1st outlet wire 5, the 2nd outlet wire 6 and the 3rd outlet wire 7 is a wire separate from the winding wire 23, and is electrically connected to the winding wire 23 via the connection terminal. It may be a configured configuration.

The tip of the first outlet wire 5 is crimped to the crimp terminal 9 (the second crimp terminal 9 described later) and inserted into the cluster 25. The tip of the second outlet wire 6 is crimped to the crimp terminal 70 and inserted into the cluster 25. The tip of the third outlet wire 7 is crimped to a crimp terminal (not shown) and inserted into the cluster 25. The cluster 25 is a block-shaped molded product made of a resin such as PBT, and is connected to the power supply terminal 12. That is, all the crimp terminals can be connected to the power supply terminal 12 only by connecting the cluster 25 to the power supply terminal 12, so that the workability of the wiring can be improved.

The rotor 21 has a cylindrical shape and is installed inside the stator 20 via a gap as shown in FIG. The width of the void is, for example, 0.3 mm or more and 1.0 mm or less. The rotor 21 is, for example, a cage-shaped rotor made of die-cast aluminum.

The rotor 21 has a rotor core 26, a conductor (not shown), and an end ring 27. Similar to the stator core 22, the rotor core 26 is manufactured by punching a plurality of electrical steel sheets containing iron as a main component into a certain shape, laminating them in the axial direction, and fixing them by caulking. The thickness of each electrical steel sheet is, for example, 0.1 mm or more and 1.5 mm or less. The method of fixing the electromagnetic steel sheets of the rotor core 26 is not limited to caulking, and other methods such as welding may be used.

The conductor is filled or inserted into a plurality of slots formed in the rotor core 26. The conductor may be formed of aluminum, copper or the like.

The end ring 27 short-circuits both ends of the conductor. As a result, a cage winding is formed.

At the center of the rotor core 26 in a plan view, a shaft hole into which the spindle portion 30 of the crank shaft 3 is shrink-fitted or press-fitted is formed. That is, the inner diameter of the rotor core 26 is smaller than the outer diameter of the spindle portion 30. Although not shown in the figure, a plurality of through holes penetrating in the axial direction are formed around the shaft hole of the rotor core 26. Each through hole becomes one of the passages of the gas refrigerant discharged from the discharge muffler 44 into the internal space of the closed container 1. Each through hole also serves as one of the passages for dropping the refrigerating machine oil 14 guided to the upper part of the closed container 1 to the lower part of the closed container 1.

Although not shown, when the electric motor 2 is configured as a brushless DC motor, permanent magnets are inserted into a plurality of insertion holes formed in the rotor core 26. Permanent magnets form magnetic poles. As the permanent magnet, a ferrite magnet or a rare earth magnet is used. In order to prevent the permanent magnets from coming off in the axial direction, upper end plates and lower end plates are provided at both ends in the axial direction of the rotor 21. The upper end plate and the lower end plate also serve as a rotary balancer. The upper end plate and the lower end plate are fixed to the rotor core 26 by a plurality of fixing rivets or the like.

As shown in FIG. 3, the crank shaft 3 includes a spindle portion 30 fixed to the rotor 21 of the motor 2, and a sub-shaft portion 31 provided on the opposite side of the spindle portion 30 with the compression mechanism portion 4 interposed therebetween. It has an eccentric shaft portion 32 provided between the main shaft portion 30 and the sub-shaft portion 31. The spindle portion 30, the sub-shaft portion 31, and the eccentric shaft portion 32 are each cylindrical. Incidentally, the material of the crank shaft 3 is a cast material or a forged material.

The main shaft portion 30 and the sub shaft portion 31 are provided so that their central axes coincide with each other. The eccentric shaft portion 32 is provided so that the central shaft deviates from the central shafts of the main shaft portion 30 and the sub-shaft portion 31. In the crank shaft 3, when the main shaft portion 30 and the sub shaft portion 31 rotate around the central axis, the eccentric shaft portion 32 rotates eccentrically.

As shown in FIG. 5, a through hole serving as an oil supply passage 33 for the refrigerating machine oil 14 is formed along the axial direction in the axial center portion of the crank shaft 3. An oil supply mechanism such as an oil pump is provided at the lower part of the crank shaft 3. The refrigerating machine oil 14 stored in the bottom of the closed container 1 is pumped up by the oil supply mechanism as the crank shaft 3 rotates, and is supplied to each sliding portion of the compression mechanism portion 4.

As shown in FIGS. 3 and 5, the compression mechanism portion 4 includes a cylinder 40 having a cylinder chamber 40a, a main bearing 41 and an auxiliary bearing 42 as bearings for closing the cylinder chamber 40a, a rolling piston 43, and a discharge muffler 44. And a vane 45.

The outer peripheral portion of the cylinder 40 is fixed to the closed container 1 by a bolt or the like. As shown in FIG. 5, the cylinder 40 has a circular outer circumference, and a cylinder chamber 40a, which is a circular space, is formed inside the cylinder 40. The cylinder chamber 40a is a space for compressing the refrigerant during driving. As shown in FIG. 3, the cylinder chamber 40a has both ends in the axial direction of the crank shaft 3 open, and the main bearing 41 provided on the upper surface of the cylinder 40 and the auxiliary bearing 42 provided on the lower surface of the cylinder 40. Is blocked by. Although not shown, the cylinder 40 is provided with a suction port through which the refrigerant gas from the suction pipe 10 passes through the cylinder chamber 40a from the outer peripheral surface. Although not shown, the cylinder 40 is formed with a discharge port for discharging the refrigerant compressed in the cylinder chamber 40a by cutting out the upper end surface of the cylinder 40. Incidentally, the material of the cylinder 40 is sintered steel, gray cast iron or carbon steel.

The main bearing 41 is an inverted T-shaped bearing when viewed from the side. The main bearing 41 is slidably fitted to the main shaft portion 30 of the crankshaft 3 and closes the end surface of the cylinder chamber 40a on the motor 2 side. On the other hand, the auxiliary bearing 42 is a bearing having a T-shaped side view. The auxiliary bearing 42 is slidably fitted to the auxiliary shaft portion 31 of the crank shaft 3 and closes the end face of the cylinder chamber 40a on the refrigerating machine oil 14 side. The main bearing 41 and the auxiliary bearing 42 are fixed to the cylinder 40 by fasteners such as bolts, respectively, and support the crank shaft 3 which is the rotation shaft of the rolling piston 43. An oil film is formed between the main bearing 41 and the spindle portion 30 by supplying the refrigerating machine oil 14 sucked up through the oil supply passage 33. The main bearing 41 supports the main shaft portion 30 without coming into contact with the main shaft portion 30 due to the fluid lubrication of the oil film. Further, between the auxiliary bearing 42 and the auxiliary shaft portion 31, the refrigerating machine oil 14 sucked up through the oil supply passage 33 is supplied to form an oil film. Like the main bearing 41, the sub-bearing 42 also supports the sub-shaft portion 31 without coming into contact with the sub-shaft portion 31 due to fluid lubrication of the oil film. Incidentally, the material of the main bearing 41 and the auxiliary bearing 42 is a cast material or a sintered material, and specifically, a sintered steel, a gray cast iron or a carbon steel.

Although not shown, the main bearing 41 is formed with a discharge port for discharging the refrigerant compressed in the cylinder chamber 40a. The discharge port is located at a position connected to the compression chamber when the cylinder chamber 40a is divided into the suction chamber and the compression chamber by the vane 45. A discharge valve that closes the discharge port so as to be openable and closable is attached to the main bearing 41. The discharge valve closes until the gas refrigerant in the cylinder chamber 40a reaches a desired pressure, and opens when the gas refrigerant in the compression chamber reaches a desired pressure. Thereby, the discharge timing of the gas refrigerant from the cylinder chamber 40a is controlled.

A discharge muffler 44 arranged so as to cover the discharge hole is attached to the outside of the main bearing 41. Although not shown in the figure, the discharge muffler 44 is formed with a discharge hole for communicating the inside of the discharge muffler 44 with the inside of the closed container 1. When the discharge valve is opened, the high-temperature and high-pressure gas refrigerant discharged from the discharge valve once enters the discharge muffler 44, and then is discharged from the discharge muffler 44 into the internal space of the closed container 1.

Although the discharge port and the discharge valve are configured to be provided in the main bearing 41, they may be provided in the auxiliary bearing 42. Alternatively, the discharge port and the discharge valve may be provided in both the main bearing 41 and the sub bearing 42. In this case, the discharge muffler 44 is attached to the outside of the bearing provided with the discharge port and the discharge valve.

The rolling piston 43 is formed in a ring shape and is slidably fitted to the eccentric shaft portion 32 of the crank shaft 3. The rolling piston 43 is provided in the cylinder chamber 40a together with the eccentric shaft portion 32, and rotates eccentrically together with the eccentric shaft portion 32 in the cylinder chamber 40a to compress the refrigerant. The material of the rolling piston 43 is a cast material, specifically, an alloy steel containing molybdenum, nickel and chromium, or an iron-based cast material.

As shown in FIG. 5, the cylinder 40 is formed with a vane groove 40b that communicates with the cylinder chamber 40a and extends in the radial direction. The vane groove 40b is provided with a vane 45 for partitioning the cylinder chamber 40a into a suction chamber which is a low pressure operating chamber and a compression chamber which is a high pressure operating chamber. The vane 45 has a plate shape with a rounded tip. During the compression process, the vane 45 slides back and forth in the vane groove 40b following the eccentric rotation of the rolling piston 43 while the tip portion is in contact with the outer peripheral portion of the rolling piston 43. The cylinder chamber 40a is divided into a suction chamber and a compression chamber by the tip end portion of the vane 45 abutting on the outer peripheral portion of the rolling piston 43. Incidentally, the material of the vane 45 is high-speed tool steel.

Further, as shown in FIG. 5, the cylinder 40 has a back pressure chamber 40c formed on the back surface side of the vane groove 40b. Although not shown, the back pressure chamber 40c houses a vane spring arranged in series with the vane 45. The vane spring urges the tip of the vane 45 so as to press it against the outer peripheral surface of the rolling piston 43. Incidentally, when the compressor 101 starts operation, a force due to a differential pressure between the pressure in the closed container 1 which is a high pressure and the pressure in the cylinder chamber 40a acts on the back surface of the vane 45. Therefore, the vane spring is mainly used for the purpose of pressing the vane 45 against the rolling piston 43 when the compressor 101 is started and there is no difference between the pressure in the closed container 1 and the pressure in the cylinder chamber 40a. Will be done.

Incidentally, although not shown, when the compressor 101 is configured as a swing type rotary compressor, the vane 45 is provided integrally with the rolling piston 43. When the crank shaft is driven, the vane reciprocates along the groove of the support rotatably attached to the rolling piston. The vane divides the inside of the cylinder chamber into a compression chamber and a suction chamber by moving back and forth in the radial direction while swinging according to the rotation of the rolling piston. The support is composed of two columnar members having a semicircular cross section. The support is rotatably fitted into a circular holding hole formed in the middle between the suction port and the discharge port of the cylinder.

Here, the operation of the compressor 101 will be briefly described with reference to FIGS. 3 and 5. First, electric power is supplied from the power supply terminal 12 to the stator 20 of the electric motor 2 via the electric wire bundle 24. As a result, a current flows through the winding 23 of the stator 20, and a magnetic flux is generated from the winding 23. The rotor 21 of the motor 2 rotates by the action of the magnetic flux generated from the winding 23 and the magnetic flux generated from the cage winding of the rotor 21. The rotation of the rotor 21 causes the crank shaft 3 fixed to the rotor 21 to rotate. As the crank shaft 3 rotates, the rolling piston 43 rotates eccentrically in the cylinder chamber 40a of the cylinder 40. The cylinder chamber 40a, which is a space between the cylinder 40 and the rolling piston 43, is divided into a suction chamber and a compression chamber by a vane 45. As the crank shaft 3 rotates, the volume of the suction chamber and the volume of the compression chamber change. In the suction chamber, the low-pressure gas refrigerant is sucked from the suction muffler 107 through the suction pipe 10 by gradually expanding the volume. In the compression chamber, the gas refrigerant is compressed by gradually reducing the volume. The compressed, high-pressure and high-temperature gas refrigerant is discharged from the discharge muffler 44 into the space inside the closed container 1. The discharged gas refrigerant passes through the motor 2 and is discharged to the outside of the closed container 1 from the discharge pipe 11 at the upper part 1b of the container. The refrigerant discharged to the outside of the closed container 1 passes through the refrigerant circuit 200 and returns to the suction muffler 107 again.

Next, with reference to FIG. 5, the characteristics of the lead wire of the compressor according to the first embodiment will be described with reference to FIG. FIG. 6 is an explanatory diagram showing the configuration of the lead wire in the electric motor according to the first embodiment.

As described above, the electric wire bundle 24 has a first outlet wire 5, a second outlet wire 6, and a third outlet wire 7. As shown in FIG. 6, in the first outlet wire 5, the electric wire unit 5A composed of one first electric wire 50, and the adjacent second electric wire 51 and the third electric wire 52 are electrically connected to each other at the first crimp terminal 8. It has an electric wire assembly 5B connected to the wire assembly 5B. That is, the first outlet wire 5 has three electric wires, that is, the first electric wire 50, the second electric wire 51, and the third electric wire 52. The second electric wire 51 is an electric wire arranged at a position adjacent to the first electric wire 50. The second electric wire 51 is drawn out from the electric wire assembly 5B and is electrically connected to the electric wire unit 5A by the second crimp terminal 9. The second crimp terminal 9 is electrically connected to the power supply terminal 12 of the compressor 101 via the cluster 25.

The first crimp terminal 8 and the second crimp terminal 9 have a serration structure. Since the first crimp terminal 8 and the second crimp terminal 9 have serrations, the electric wires inside the first crimp terminal 8 and the second crimp terminal 9 can be electrically and mechanically connected even when the electric wire is covered with the electric wire insulating film. Further, since the second electric wire 51 and the first electric wire 50 are arranged at adjacent positions, the position of crimping at the first crimp terminal 8 and the position of crimping at the second crimp terminal 9 can be brought close to each other. It is possible to surely avoid the situation where the electric wires intersect.

The electric wire constituting the first outlet wire 5 may be electrically connected by the first crimp terminal 8 or the second crimp terminal 9 with the electric wire insulating film removed. The electric wire can be improved in electrical connectivity by removing the electric wire insulating film in advance using a chemical or the like and then crimping the electric wire with the first crimp terminal 8 or the second crimp terminal 9.

Although not shown, the second outlet wire 6 is composed of, for example, two electric wires. The third outlet wire 7 is composed of, for example, one electric wire. However, the second outlet line 6 and the third outlet line 7 may have the same configuration as the first outlet line 5.

By the way, the electric wires that make up the lead wire are soft and easily deformed. Therefore, when the lead wire has three or more electric wires and the electric wires are crimped by one crimp terminal, there is a possibility that the electric wires are crimped to the crimp terminal in a crossed state. If the crimp terminals are crimped with the wires crossed, the wires may press against each other and break. Further, if the lead wire is pulled when the crimp terminal is connected to the power supply terminal, the crossed electric wires may be broken due to the impact of the pulling. As described above, in the compressor, if the electric wire is broken, an electrical connection failure occurs.

Therefore, as described above, in the electric motor 2 according to the first embodiment, at least one lead wire 5 is a single electric wire 5A composed of one electric wire 50, and at least two or more

electric wires

51 and 52 adjacent to each other. Has an electric wire assembly 5B electrically connected by the first crimp terminal 8. One of the electric wires 51 of the electric wire assembly 5B is drawn out from the electric wire assembly 5B and is electrically connected to the electric wire unit 5A by the second crimp terminal 9. The second crimp terminal 9 is electrically connected to the power supply terminal 12 of the compressor 101.

Therefore, the electric motor 2 according to the first embodiment has two electric wires (50, 51, 52) even when the outlet wire 5 is composed of three or more electric wires (50, 51, 52). Since the first crimp terminal 8 and the second crimp terminal 9 are electrically connected to each other, when crimping the electric wire (51, 52) at the first crimp terminal 8, and at the second crimp terminal 9, the electric wire (50, When crimping 51), it is possible to suppress a situation in which electric wires cross each other and press each other, and it is possible to avoid an electrical connection failure.

Further, in the motor 2 according to the first embodiment, one electric wire 51 drawn out from the electric wire assembly 5B is an electric wire arranged at a position adjacent to the electric wire unit 5A. Therefore, the position of crimping at the first crimp terminal 8 and the position of crimping at the second crimp terminal 9 can be brought close to each other, and the situation where the electric wires intersect can be reliably avoided.

Further, the first crimp terminal 8 and the second crimp terminal 9 have a serration structure. Since the first crimp terminal 8 and the second crimp terminal 9 have serrations, the electric wires inside the first crimp terminal 8 and the second crimp terminal 9 can be electrically and mechanically connected even when the electric wire is covered with the electric wire insulating film.

Further, the electric wires (50, 51, 52) constituting the outlet wire 5 are electrically connected by the first crimp terminal 8 or the second crimp terminal 9 with the electric wire insulating film removed. Therefore, by crimping the electric wire from which the electric wire insulating film has been removed by the first crimp terminal 8 or the second crimp terminal 9, the connectivity can be electrically improved.

Embodiment 2.
Next, the electric motor 2 according to the second embodiment will be described with reference to FIG. 7. FIG. 7 is an explanatory view showing the configuration of the lead wire in the electric motor according to the second embodiment. The same components as those of the electric motor described in the second embodiment are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

The motor 2 according to the second embodiment has a different configuration of the first outlet line 5 from the motor 2 according to the first embodiment. As shown in FIG. 7, the first outlet wire 5 in the second embodiment is a wire assembly 5C in which the adjacent first wire 50 and the second wire 51 are electrically connected by the first crimp terminal 80. The adjacent third electric wire 52 and the fourth electric wire 53 have an electric wire assembly 5D electrically connected by the first crimp terminal 81. That is, the first outlet wire 5 in the second embodiment has four electric wires, that is, the first electric wire 50, the second electric wire 51, the third electric wire 52, and the fourth electric wire 53.

The second electric wire 51 is arranged at a position adjacent to the third electric wire 52. The second electric wire 51 is drawn from the electric wire assembly 5C. The third electric wire 52 is drawn from the electric wire assembly 5D. The drawn out second electric wire 51 and the third electric wire 52 are electrically connected by the second crimp terminal 9. The second crimp terminal 9 is electrically connected to the power supply terminal 12 of the compressor 101 via the cluster 25.

The first crimp terminal 8 and the second crimp terminal 9 have a serration structure. Since the first crimp terminal 8 and the second crimp terminal 9 have serrations, the electric wires inside the first crimp terminal 8 and the second crimp terminal 9 can be electrically and mechanically connected even when the electric wire is covered with the electric wire insulating film.

As described above, the motor 2 according to the second embodiment extends from the stator core 22, the winding 23 wound around the stator core 22, and the winding 23, and is electrically connected to the power supply terminal 12. It has one or more outlets (5, 6, 7) to be connected. At least one lead wire 5 is a wire assembly (5C and 5D) in which two adjacent wires (50 and 51, 52 and 53) are electrically connected by a first crimp terminal (80 or 81). I have two sets. The electric wire (51, 52) of any one of the electric wire aggregates (5C and 5D) is drawn from the electric wire aggregate (5C and 5D) and electrically connected by the second crimp terminal 9. The second crimp terminal 9 is electrically connected to the power supply terminal 12 of the compressor 101.

Therefore, in the electric motor 2 according to the second embodiment, even when the outlet wire 5 is composed of three or more electric wires (50, 51, 52, 53), the electric wires (50, 51, 52, Since the configuration is such that two 53) are electrically connected by the first crimp terminal 8 and the second crimp terminal 9, when crimping the electric wire (50 and 51, 52 and 53) by the first crimp terminal (80 or 81). , And when crimping the electric wires (51, 52) at the second crimp terminal 9, it is possible to suppress the situation where the electric wires cross each other and press each other, and it is possible to avoid an electrical connection failure.

Further, the motor 2 according to the second embodiment is an electric wire in which one electric wire (51, 52) drawn from each electric wire aggregate (5C or 5D) is arranged at a position adjacent to each other. Therefore, the crimping position at the first crimping terminal (80 and 81) and the crimping position at the second crimping terminal 9 can be brought close to each other, and the situation where the electric wires intersect can be reliably avoided.

Although the motor 2, the compressor 101 and the refrigerating cycle device 100 have been described above based on the embodiments, the motor 2, the compressor 101 and the refrigerating cycle device 100 are not limited to the configuration of the above-described embodiment. No. The electric motor 2, the compressor 101, and the refrigeration cycle device 100 are not limited to the above-mentioned components, and may include other components. In short, the motor 2, the compressor 101, and the refrigeration cycle device 100 include a range of design changes and application variations normally performed by those skilled in the art within a range that does not deviate from the technical idea thereof.

1 closed container, 1a body, 1b upper part of container, 1c lower part of container, 2 electric motor, 3 crank shaft, 4 compression mechanism, 5 1st outlet wire, 5A single wire, 5B, 5C, 5D wire assembly, 6th 2 outlets, 7 3rd outlets, 8 1st crimp terminals, 9 2nd crimp terminals, 10 suction pipes, 11 discharge pipes, 12 power terminals, 13 rods, 14 refrigerating machine oils, 20 stators, 21 rotors , 22 Fixture core, 23 Winding, 24 Wire bundle, 25 Cluster, 26 Rotor core, 27 End ring, 30 Main shaft, 31 Sub-shaft, 32 Eccentric shaft, 33 Refueling path, 40 Cylinder, 40a Cylinder chamber , 40b vane groove, 40c back pressure chamber, 41 main bearing, 42 auxiliary bearing, 43 rolling piston, 44 discharge muffler, 45 vane, 50 1st electric wire, 51 2nd electric wire, 52 3rd electric wire, 53 4th electric wire, 70 Crimping terminal, 80, 81 1st crimping terminal, 100 refrigerating cycle device, 101 compressor, 102 flow path switching device, 103 1st heat exchanger, 104 expansion mechanism, 105 2nd heat exchanger, 106 control unit, 107 suction Muffler, 200 refrigerant circuit.

Claims

An electric motor that is housed in a compressor container that has a power supply terminal and is used.
Stator iron core and
The winding wound around the stator core and
It has one or more outlets extending from the winding and electrically connected to the power terminal.
At least one of the outlet wires has a single electric wire composed of one electric wire and an aggregate of electric wires in which two adjacent electric wires are electrically connected by a first crimp terminal.
One of the electric wires of the electric wire assembly is drawn from the electric wire assembly and is electrically connected to the electric wire unit by the second crimp terminal.
An electric motor in which the second crimp terminal is electrically connected to the power supply terminal.
An electric motor that is housed in a compressor container that has a power supply terminal and is used.
Stator iron core and
The winding wound around the stator core and
It has one or more outlets extending from the winding and electrically connected to the power terminal.
At least one of the outlet wires has two sets of wire aggregates in which two adjacent wires are electrically connected by a first crimp terminal.
One of the wires of each wire assembly is drawn from the wire assembly and electrically connected by the second crimp terminal.
An electric motor in which the second crimp terminal is electrically connected to the power supply terminal.
The motor according to claim 1, wherein one of the electric wires drawn out from the electric wire assembly is an electric wire arranged at a position adjacent to the electric wire alone.
The motor according to claim 2, wherein one of the electric wires drawn out from each of the electric wire aggregates is an electric wire arranged at a position adjacent to each other.
The motor according to any one of claims 1 to 4, wherein the electric wire constituting the outlet wire is a copper wire.
The motor according to any one of claims 1 to 5, wherein the electric wire constituting at least one of the outlet wires is an aluminum wire.
The electric motor according to any one of claims 1 to 6, wherein the first crimp terminal and the second crimp terminal have a serration structure.
The electric wire constituting the outlet wire is electrically connected to the first crimp terminal or the second crimp terminal with the electric wire insulating film removed, according to any one of claims 1 to 7. The electric motor described in.
The motor according to any one of claims 1 to 8 and the electric motor.
A compression mechanism that is driven by the motor to compress the refrigerant,
A closed container for accommodating the motor and the compression mechanism,
A compressor provided with a power supply terminal fixed to the closed container and electrically connected to the outlet wire.
The compressor according to claim 9, the flow path switching device, the first heat exchanger, the expansion mechanism, and the second heat exchanger are sequentially connected by pipes to provide a refrigerant circuit in which the refrigerant circulates. Also, refrigeration cycle equipment.