JPWO2019082255A1 - Compressor and refrigeration cycle device - Google Patents

Abstract

In the compressor, the discharge pipe (22) is provided at a position that overlaps with the central axis of the container (20) at one axial end of the container (20). The first terminal (24a) and the second terminal (24b) are attached at positions displaced from the central axis of the container (20) at one axial end of the container (20). The first connection line (26a) and the second connection line (26b) are routed along the inner peripheral wall (20d) of the container (20) and do not intersect with each other in a plan view, respectively, inside the container (20). The first terminal (24a) and the second terminal (24b) are electrically connected to the electric motor.

Description

  The present invention relates to a compressor and a refrigeration cycle device.

  In a hermetic electric compressor in which a compression mechanism section and an electric motor section are housed in a hermetic container, the electric motor section is composed of a rotor and a stator. The rotor is connected to the compression mechanism section via a main shaft. The stator is fixed to the closed container by a method such as shrink fitting. The stator is connected to an airtight terminal arranged in the closed container by a connecting wire connected to the winding of the stator. The compression mechanism is driven by applying an external power supply via the airtight terminal.

  In Patent Document 1 to Patent Document 3, two hermetic terminals are provided in a hermetically sealed container, and one of the hermetic terminals is provided as a means for achieving both high efficiency at low speed rotation and enabling operation at high rotational speed. A hermetic electric compressor is described, which is connected to a first connecting wire of a winding of a motor section and the other of the hermetic terminals is connected to a second connecting wire of a winding of the motor section.

  Patent Document 2 discloses a first connection line and a second connection line as a means for preventing the first connection line and the second connection line from coming into contact with a closed container, a rotor, or a discharge pipe to cause disconnection. A hermetic electric compressor including a resin-made connecting member for connecting a wire to each other is described.

JP, 2006-246674, A JP, 2009-191822, A JP, 2012-082776, A

  In the hermetic electric compressors described in Patent Documents 1 to 3, the connection line passes near the discharge pipe. The connecting lines may intersect with each other regardless of the length dimension, may intersect with each other as the length dimension increases, or may be connected to each other by a connecting member. Therefore, the oil wound up in the upper space of the closed container stays at the intersecting portion or the connecting portion of the connecting line, and is easily taken out of the compressor from the discharge pipe together with the compressed refrigerant gas. As a result, oil depletion reduces the reliability of the compressor.

  The present invention aims to reduce the amount of oil that accumulates in the connecting line.

A compressor according to one aspect of the present invention,
A compression mechanism for compressing the refrigerant,
An electric motor for driving the compression mechanism,
A container that houses the compression mechanism and the electric motor,
A first terminal and a second terminal attached to one axial end of the container;
A first connecting wire and a first connecting wire, which are routed along the inner peripheral wall of the container, electrically connect the first terminal and the second terminal to the electric motor in the container without intersecting each other in a plan view. 2 connection lines.

  In the present invention, the connecting wire is routed along the inner peripheral wall of the container. Therefore, even if the length of the connecting wire is large, the connecting wires do not intersect with each other, and a portion where oil stays is less likely to occur in the connecting wire.

3 is a circuit diagram of the refrigeration cycle apparatus according to Embodiment 1. FIG. 3 is a circuit diagram of the refrigeration cycle apparatus according to Embodiment 1. FIG. FIG. 3 is a vertical sectional view of the compressor according to the first embodiment. FIG. 3 is a partial cross-sectional view of the compressor according to the first embodiment. 3 is a plan view of a part of the compressor according to the first embodiment. FIG. The one part top view of the compressor which concerns on a comparative example. FIG. 6 is a plan view of a part of the compressor according to the second embodiment. FIG. 6 is a vertical cross-sectional view of the compressor according to the third embodiment. FIG. 6 is a vertical cross-sectional view of the compressor according to the fourth embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each drawing, the same or corresponding parts are designated by the same reference numerals. In the description of the embodiments, description of the same or corresponding parts will be appropriately omitted or simplified. The present invention is not limited to the embodiments described below, and various modifications can be made as necessary. For example, two or more of the embodiments described below may be combined and implemented. Alternatively, among the embodiments described below, one embodiment or a combination of two or more embodiments may be partially implemented.

Embodiment 1.
This embodiment will be described with reference to FIGS. 1 to 6.

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

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

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

  The refrigeration cycle device 10 includes a refrigerant circuit 11 in which a refrigerant circulates. The refrigeration cycle apparatus 10 includes a compressor 12, a four-way valve 13, a first heat exchanger 14 that is an outdoor heat exchanger, an expansion mechanism 15 that is an expansion valve, and a second heat exchanger that is an indoor heat exchanger. 16 and 16 are further provided. The compressor 12, the four-way valve 13, the first heat exchanger 14, the expansion mechanism 15, and the second heat exchanger 16 are connected to the refrigerant circuit 11.

  The compressor 12 compresses the refrigerant. The four-way valve 13 switches the flowing direction of the refrigerant between the cooling operation and the heating operation. The first heat exchanger 14 operates as a condenser during cooling operation, and radiates the heat of the refrigerant compressed by the compressor 12. That is, the first heat exchanger 14 performs heat exchange using the refrigerant compressed by the compressor 12. The first heat exchanger 14 operates as an evaporator during heating operation, and performs heat exchange between the outdoor air and the refrigerant expanded by the expansion mechanism 15 to heat the refrigerant. The expansion mechanism 15 expands the refrigerant that radiates heat in the condenser. The second heat exchanger 16 operates as a condenser during the heating operation, and radiates the heat of the refrigerant compressed by the compressor 12. That is, the second heat exchanger 16 performs heat exchange using the refrigerant compressed by the compressor 12. The second heat exchanger 16 operates as an evaporator during the cooling operation, and performs heat exchange between the indoor air and the refrigerant expanded by the expansion mechanism 15 to heat the refrigerant.

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

  The control device 17 is, for example, a microcomputer. Although FIG. 1 and FIG. 2 show only the connection between the control device 17 and the compressor 12, the control device 17 is not limited to the compressor 12 but to the components other than the compressor 12 connected to the refrigerant circuit 11. May be connected. The control device 17 monitors and controls the state of each component connected to the control device 17.

  As the refrigerant circulating in the refrigerant circuit 11, an HFC-based refrigerant such as R32, R125, R134a, R407C or R410A is used. Alternatively, an HFO-based refrigerant such as R1123, R1132(E), R1132(Z), R1132a, R1141, R1234yf, R1234ze(E) or R1234ze(Z) is 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.

  The configuration of the compressor 12 according to the present embodiment will be described with reference to FIG.

  FIG. 3 shows a vertical cross section of the compressor 12.

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

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

  The container 20 is specifically a closed container. Refrigerating machine oil 25 is stored at 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 electric motor 40 is housed in the container 20. Specifically, the electric motor 40 is installed in the upper part inside the container 20. Although the electric motor 40 is a concentrated winding motor in the present embodiment, it may be a distributed winding motor.

  The compression mechanism 30 is housed in the container 20. Specifically, the compression mechanism 30 is installed in the lower part inside the container 20. That is, the compression mechanism 30 is arranged below the electric motor 40 in the container 20.

  The crankshaft 50 connects the electric motor 40 and the compression mechanism 30. The crankshaft 50 forms an oil supply passage for the refrigerating machine oil 25 and a rotation shaft for the electric motor 40.

  The refrigerating machine oil 25 is pumped up by an oil supply mechanism such as an oil pump provided below the crankshaft 50 as the crankshaft 50 rotates. Then, the refrigerating machine oil 25 is supplied to each sliding portion of the compression mechanism 30 and lubricates each sliding portion of the compression mechanism 30. As the refrigerator oil 25, POE, PVE, AB or the like which is a synthetic oil is used. "POE" is an abbreviation for Polyolester. "PVE" is an abbreviation for Polyvinyl Ether. “AB” is an abbreviation for Alkylbenezone.

  The electric motor 40 rotates the crankshaft 50. The compression mechanism 30 compresses the refrigerant by being driven by the rotation of the crankshaft 50. That is, the compression mechanism 30 compresses the refrigerant by being driven by the rotational force of the electric motor 40 transmitted via the crankshaft 50. Specifically, this refrigerant is a low-pressure gas refrigerant sucked into the suction pipe 21. The high-temperature, 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 has an eccentric shaft portion 51, a main shaft portion 52, and a sub shaft portion 53. These are provided in the order of the main shaft portion 52, the eccentric shaft portion 51, and the sub shaft portion 53 in the axial direction. That is, the main shaft portion 52 is provided on one end side in the axial direction of the eccentric shaft portion 51, and the sub shaft portion 53 is provided on the other end side in the axial direction of the eccentric shaft portion 51. The eccentric shaft portion 51, the main shaft portion 52, and the sub shaft portion 53 are each cylindrical. The main shaft portion 52 and the sub shaft portion 53 are provided so that their central axes coincide with each other, that is, coaxially. The eccentric shaft portion 51 is provided such that the central axis thereof is displaced from the central axes of the main shaft portion 52 and the sub 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 rotates eccentrically.

  Below, the detail of the container 20 is demonstrated.

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

  The body portion 20a has a cylindrical shape. The container upper portion 20b closes the upper opening of the body portion 20a. The container upper portion 20b corresponds to one axial end of the container 20. The container lower portion 20c closes the lower opening of the body portion 20a. The container lower portion 20c corresponds to the other axial end of the container 20. The body 20a and the container upper portion 20b are connected by welding, and the body portion 20a and the container lower portion 20c are connected by welding, whereby the container 20 is sealed. A suction pipe 21 connected to a suction muffler 23 is provided on the body portion 20a. A discharge pipe 22 is provided on the container upper portion 20b.

  The details of the electric motor 40 will be described below.

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

  The electric motor 40 has a stator 41 and a rotor 42.

  The stator 41 has a cylindrical shape and is fixed so as to be in contact with the inner peripheral surface of the container 20. The rotor 42 has a columnar shape and is installed inside the stator 41 with a gap. The width of the void is, for example, 0.3 mm or more and 1.0 mm or less.

  The stator 41 has a stator core 43 and windings 44. The stator core 43 is manufactured by punching a plurality of electromagnetic steel plates containing iron as a main component into a certain shape, stacking them in the axial direction, and fixing by caulking. The thickness of each electromagnetic steel sheet is, for example, 0.1 mm or more and 1.5 mm or less. The outer diameter of the stator core 43 is larger than the 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 winding wire 44 is wound around the stator core 43. Specifically, the winding wire 44 is wound around the stator core 43 in a concentrated manner with an insulating member interposed therebetween. The winding wire 44 is composed of a core wire and at least one coat that covers the core wire. 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 material of the insulating member is PET. "PET" is an abbreviation for Polyethylene Terephthalate.

  The method of fixing the electromagnetic steel plates of the stator core 43 to each other is not limited to caulking, and may be another method such as welding. The method of fixing the stator core 43 to the inside of the body portion 20a of the container 20 is not limited to shrink fitting, and other methods such as press fitting or welding may be used. The material of the core wire of the winding wire 44 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 Polybutyrene Terephthalate. “FEP” is an abbreviation for Fluorinated Ethylene Propylene. "PFA" is an abbreviation for Perfluoroalkoxy Alkane. "PTFE" is an abbreviation for Polytetrafluoroethylene. "LCP" is an abbreviation for Liquid Crystal Polymer. "PPS" is an abbreviation for Polyphenylene Sulfide.

  The rotor 42 has a rotor core 45 and a permanent magnet 46. Like the stator core 43, the rotor core 45 is manufactured by punching out a plurality of electromagnetic steel plates containing iron as a main component in a certain shape, stacking them in the axial direction, and fixing by caulking. The thickness of each electromagnetic steel sheet is, for example, 0.1 mm or more and 1.5 mm or less. The permanent magnet 46 is inserted into a plurality of insertion holes formed in the rotor core 45. The permanent magnet 46 forms a magnetic pole. As the permanent magnet 46, a ferrite magnet or a rare earth magnet is used.

  The method of fixing the electromagnetic steel plates of the rotor core 45 to each other is not limited to caulking, but may be another method such as welding.

  A shaft hole into which the main shaft portion 52 of the crankshaft 50 is shrink-fitted or press-fitted is formed at the center of the rotor core 45 in plan view. That is, the inner diameter of the rotor core 45 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 is formed around the shaft hole of the rotor core 45. Each through hole serves as one of the passages of the gas refrigerant discharged from the discharge muffler 35 described later to the space inside the container 20. Each through hole also serves as one of the passages for dropping the refrigerating machine oil 25 guided to the upper portion of the container 20 to the lower portion of the container 20.

  Although not shown, when the electric motor 40 is configured as an induction motor, a plurality of slots formed in the rotor core 45 are filled or inserted with conductors made of aluminum, copper, or the like. Then, a squirrel cage winding is formed in which both ends of the conductor are short-circuited by the end rings.

  The container upper part 20b is provided with a terminal 24 connected to an external power source such as an inverter device, and a rod 28 to which a cover for protecting the terminal 24 is attached. The terminal 24 is specifically an airtight terminal such as a glass terminal. In the present embodiment, the terminal 24 is fixed to the container 20 by welding. A connection wire 26, which is connected to the winding wire 44 of the electric motor 40 via a connection terminal 47, is connected to the terminal 24. As a result, the terminal 24 and the electric motor 40 are electrically connected.

  A discharge pipe 22 having both axial ends open is further provided on the container upper portion 20b. The gas refrigerant discharged from the compression mechanism 30 passes through the rotor 42 and the oil separation plate 29 above the rotor 42 in order, and from the space in the container 20 to the external refrigerant circuit 11 via the discharge pipe 22. Is ejected.

  The oil separation plate 29 separates the refrigerating machine oil 25 in the container 20 pumped up together with the refrigerant. The oil separation plate 29 is fixed to the crankshaft 50 by press fitting, and rotates as the crankshaft 50 rotates. Alternatively, the oil separation plate 29 is fixed to the rotor 42 using a fixing tool such as a rivet, and rotates with the rotation of the rotor 42. Refrigerating machine oil 25 has a larger specific gravity than a refrigerant. Therefore, the oil separation plate 29 can fly and separate the refrigerating machine oil 25 in the outer peripheral direction by centrifugal force.

  The discharge pipe 22 may be installed on the outer peripheral portion of the container upper portion 20b, but in the present embodiment, it is installed directly above the crankshaft 50 and in the central portion of the container upper portion 20b. If the discharge pipe 22 is installed on the outer peripheral portion of the container upper portion 20b, the refrigerating machine oil 25 separated by the oil separation plate 29 enters the discharge pipe 22 and is discharged to the outside of the container 20. The amount of the refrigerating machine oil 25 may decrease, and the lubricity of the compression mechanism 30 may deteriorate. In order to prevent such a decrease in lubricity, it is desirable that the discharge pipe 22 be installed in the center of the container upper portion 20b. The outer diameter of the discharge pipe 22 is preferably 0.1 times or more and 0.2 times or less the outer diameter of the container upper portion 20b.

  In this embodiment, resistance welding is used as a method of attaching the discharge pipe 22 to the container upper portion 20b. The discharge pipe 22 is joined to the container upper portion 20b via a ring material 27. The material of the ring material 27 is iron. By attaching the ring member 27 to the discharge pipe 22 and pressing the inclined portion of the ring member 27 against the container upper portion 20b, the container upper portion 20b is in contact with the entire circumference of the ring member 27 without a gap, and the weldability is improved. The discharge pipe 22 extends to a position closer to the compression mechanism 30 than the ring material 27 in the container 20. In this way, by making the discharge pipe 22 project toward the compression mechanism 30 more than the ring material 27, it is possible to prevent the refrigerating machine oil 25 trapped in the inclined portion of the ring material 27 from entering the discharge pipe 22.

  The method for attaching the discharge pipe 22 to the container upper portion 20b is not limited to resistance welding, and other methods such as gas welding using a brazing material or laser welding may be used. However, in gas welding, the heat input is large and the heat input range is wide. Therefore, when the terminal 24 is attached by resistance welding after the discharge pipe 22 is attached by gas welding, the surface of the portion of the container upper portion 20b where the terminal 24 is attached may be distorted. When the strain is generated, the surface of the container upper portion 20b and the surface of the terminal 24 do not come into contact with each other, which may cause welding failure during resistance welding. Therefore, also in the welding of the discharge pipe 22, it is desirable to use the resistance welding or the laser welding to reduce the heat input amount and the heat input range.

  Hereinafter, details of the compression mechanism 30 will be described with reference to FIG. 4 as well as FIG. 3.

  FIG. 4 shows a cross section of a part of the compressor 12 as seen along the axial direction. In FIG. 4, hatching showing a cross section is omitted.

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

  The inner circumference of the cylinder 31 is circular in plan view. Inside the cylinder 31, a cylinder chamber 61, which is a circular space in plan view, is formed. 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 ends in the axial direction.

  The rolling piston 32 has a ring shape. Therefore, the inner circumference and the outer circumference of the rolling piston 32 are circular in plan view. The rolling piston 32 rotates eccentrically in the cylinder chamber 61. The rolling piston 32 is slidably fitted to an eccentric shaft portion 51 of a crankshaft 50 that serves as a rotating shaft of the rolling piston 32.

  The cylinder 31 is provided with a vane groove 62 connected to the cylinder chamber 61 and extending in the radial direction. A back pressure chamber 63, which is a circular space in plan view, is formed outside the vane groove 62 and is connected to the vane groove 62. In the vane groove 62, a vane 64 is installed to partition the cylinder chamber 61 into a suction chamber which is a low pressure working chamber and a compression chamber which is a high pressure working chamber. The vane 64 has a plate shape with a rounded tip. The vane 64 reciprocates while sliding in the vane groove 62. The vane 64 is constantly pressed against the rolling piston 32 by a vane spring provided in the back pressure chamber 63. Since the pressure inside the container 20 is high, when the compressor 12 starts operating, the force due to the difference between the pressure inside the container 20 and the pressure inside the cylinder chamber 61 is applied to the back surface of the vane, which is the surface of the vane 64 on the back pressure chamber 63 side. Works. Therefore, the vane spring is used mainly for the purpose of pressing the vane 64 against the rolling piston 32 at the time of starting the compressor 12 where there is no difference in pressure between the container 20 and the cylinder chamber 61.

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

  The sub bearing 34 is a T-shaped bearing in a side view. The sub bearing 34 is slidably fitted to the sub shaft portion 53, which is a portion below the eccentric shaft portion 51 of the crank shaft 50. An oil film is formed between the sub bearing 34 and the sub shaft portion 53 by supplying the refrigerating machine oil 25 sucked up through the through hole 54 of the crank shaft 50. The sub bearing 34 closes the cylinder chamber 61 of the cylinder 31 and the lower side of the vane groove 62. That is, the auxiliary 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 31 by fasteners 36 such as bolts, and support the crankshaft 50 that is the rotating shaft of the rolling piston 32. The main bearing 33 supports the main shaft portion 52 without coming into contact with the main shaft portion 52 due to fluid lubrication of an oil film between the main bearing 33 and the main shaft portion 52. Similar to the main bearing 33, the sub bearing 34 supports the sub shaft portion 53 without coming into contact with the sub shaft portion 53 due to the fluid lubrication of the oil film between the sub bearing 34 and the sub shaft portion 53.

  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 when the cylinder chamber 61 is partitioned into a suction chamber and a compression chamber by the vane 64. The main bearing 33 is provided with a discharge valve that opens and closes the discharge port. The discharge valve closes until the gas refrigerant in the compression chamber reaches a desired pressure and opens when the gas refrigerant in the compression chamber reaches a desired pressure. As a result, the discharge timing of the gas refrigerant from the cylinder 31 is controlled.

  The discharge muffler 35 is attached to the outside of the main bearing 33. The high-temperature and high-pressure gas refrigerant discharged when the discharge valve is opened once enters the discharge muffler 35 and is then discharged from the discharge muffler 35 into the space inside 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 attached to 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 the liquid refrigerant from directly entering the cylinder chamber 61 of the cylinder 31 when the liquid refrigerant returns. The suction muffler 23 is connected to a suction port provided on the outer peripheral surface of the cylinder 31 via a suction pipe 21. The suction port is located at a position connected to the suction chamber when the cylinder chamber 61 is partitioned into a suction chamber and a compression chamber by the vane 64. The main body of the suction muffler 23 is fixed to the side surface of the body portion 20a of the container 20 by welding or the like.

  The material of the eccentric shaft portion 51, the main shaft portion 52, and the auxiliary shaft portion 53 of the crankshaft 50 is 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, and specifically, sintered steel, gray cast iron or carbon steel. The material of the cylinder 31 is also sintered steel, gray cast iron or carbon steel. The material of the rolling piston 32 is a cast material, specifically, alloy steel containing molybdenum, nickel and chromium, or an iron-based cast material. The material of the vanes 64 is high speed tool steel.

  Although not shown, when the compressor 12 is configured as a swing type rotary compressor, the vane 64 is provided integrally with the rolling piston 32. When the crankshaft 50 is driven, the vanes 64 reciprocate along the groove of the support rotatably attached to the rolling piston 32. The vane 64 moves in the radial direction while swinging in accordance with the rotation of the rolling piston 32, thereby partitioning the inside of the cylinder chamber 61 into a compression chamber and a suction chamber. The support is composed of two columnar members each having a semicircular cross section. The support is rotatably fitted in a circular holding hole formed in an intermediate portion between the suction port and the discharge port of the cylinder 31.

***Description of operation***
The operation of the compressor 12 according to the present embodiment will be described with reference to FIGS. 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 terminal 24 to the stator 41 of the electric motor 40 via the connection line 26. As a result, a current flows through the winding wire 44 of the stator 41, and a magnetic flux is generated from the winding wire 44. The rotor 42 of the electric motor 40 rotates due to the action of the magnetic flux generated from the winding wire 44 and the magnetic flux generated from the permanent magnet 46 of the rotor 42. Specifically, the rotor 42 rotates due to the attraction and repulsion action of the rotating magnetic field generated by the current flowing through the winding wire 44 of the stator 41 and the magnetic field of the permanent magnet 46 of the rotor 42. The rotation of the rotor 42 causes the crankshaft 50 fixed to the rotor 42 to rotate. With the rotation of the crankshaft 50, the rolling piston 32 of the compression mechanism 30 eccentrically rotates in the cylinder chamber 61 of the cylinder 31 of the compression mechanism 30. A cylinder chamber 61, which is a space between the cylinder 31 and the rolling piston 32, is divided by a vane 64 into a suction chamber and a compression chamber. With the rotation of the crankshaft 50, 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 23 through the suction pipe 21 due to the volume gradually increasing. In the compression chamber, the gas refrigerant therein is compressed by gradually reducing the volume. The compressed, high-pressure and high-temperature gas refrigerant is discharged from the discharge muffler 35 into the space inside the container 20. The discharged gas refrigerant further passes through the electric motor 40 and is discharged to the outside of the container 20 from the discharge pipe 22 in the container upper portion 20b. The refrigerant discharged to the outside of the container 20 returns to the suction muffler 23 again through the refrigerant circuit 11.

***Detailed explanation of configuration***
In addition to FIG. 3, the configuration of the compressor 12 according to the present embodiment will be described in detail with reference to FIGS. 5 and 6.

  FIG. 5 shows the upper surface of a part of the compressor 12 as seen along the axial direction.

  The container upper portion 20b has a circular shape in a plan view.

  A discharge pipe 22 is provided at the center of the container upper portion 20b. That is, the discharge pipe 22 is provided at a position where one end of the container 20 in the axial direction overlaps with the central axis of the container 20.

  A plurality of terminals 24 are provided around the discharge pipe 22 in the container upper portion 20b. That is, the plurality of terminals 24 are attached at positions displaced from the central axis of the container 20 at one axial end of the container 20. The plurality of terminals 24 are electrically connected to the electric motor 40 in the container 20 via the plurality of connecting wires 26. Each terminal 24 is fitted in a through hole provided in the container upper portion 20b. The outermost shell of each terminal 24 is in contact with the inner peripheral edge of the through hole.

  Although omitted in FIG. 5, a rod 28 extending along the axial direction is also provided on the container upper portion 20b.

  In addition, accessories such as a temperature sensor may be further attached to the container upper portion 20b.

  The plurality of terminals 24 include a first terminal 24a and a second terminal 24b.

  The plurality of terminals 24 may include a terminal 24 different from the first terminal 24a and the second terminal 24b.

  The plurality of connecting wires 26 include a first connecting wire 26a for electrically connecting the first terminal 24a and the electric motor 40 in the container 20, and a first connecting wire 26a for electrically connecting the second terminal 24b and the electric motor 40 in the container 20. 2 connection lines 26b are included.

  In addition, when the plurality of terminals 24 include the terminals 24 different from the first terminal 24 a and the second terminal 24 b, the plurality of connection lines 26 include the different terminals 24 and the electric motor 40 in the container 20. Another connecting line 26 for electrical connection may be included.

  The first connection line 26a and the second connection line 26b are routed along the inner peripheral wall 20d of the container 20. Therefore, even if either or both of the first connection line 26a and the second connection line 26b have a large length dimension, the first connection line 26a and the second connection line 26b do not intersect each other in plan view, The first terminal 24a and the second terminal 24b and the electric motor 40 can be electrically connected to each other in the container 20.

  If, as shown in FIG. 6, the first connection line 26a and the second connection line 26b intersect with each other in a plan view, the refrigerating machine oil 25 wound up in the upper space of the container 20 has the first connection line 26a and the second connection line 26b. It stays at the intersection of the second connecting line 26b and is easily taken out of the container 20 from the discharge pipe 22 together with the compressed refrigerant gas. As a result, the oil circulation rate increases as compared with the case where the closed container has only one airtight terminal, and the reliability of the compressor 12 may decrease due to oil depletion. In the present embodiment, since the intersection of the first connection line 26a and the second connection line 26b is not generated, it is possible to prevent the reliability of the compressor 12 from decreasing due to oil depletion.

  When the plurality of connection lines 26 include a connection line 26 different from the first connection line 26a and the second connection line 26b, the first connection line 26a and the other connection line 26 also intersect each other in a plan view. It is required that the second connection line 26b and the other connection line 26 do not intersect each other in plan view. Therefore, it is desirable that the other connection line 26 is also routed along the inner peripheral wall 20d of the container 20.

  In the present embodiment, each of the first connecting wire 26a and the second connecting wire 26b is a plurality of lead wires. Specifically, the first connecting wire 26a is composed of three lead wires W1, W2, W3, and the second connecting wire 26b is composed of three lead wires W4, W5, W6.

  A plurality of connection terminals 47 connected to the electric motor 40 are provided at ends of a plurality of lead wires included in each of the first connection line 26a and the second connection line 26b. Specifically, the connection terminals T1, T2, T3 are provided at the ends of the lead wires W1, W2, W3, respectively, and the connection terminals T4, T5, T6 are provided at the ends of the lead wires W4, W5, W6, respectively. ing.

  At least one lead wire included in the first connection wire 26a and at least one lead wire included in the second connection wire 26b are taken out from the first terminal 24a and the second terminal 24b, respectively, in a direction toward each other. , Are drawn along the inner peripheral wall 20d of the container 20 in directions away from each other. Specifically, after the set of three lead wires W1, W2, W3 and the set of two lead wires W4, W5 are taken out from the first terminal 24a and the second terminal 24b, respectively, in a direction toward each other, They are drawn along the inner peripheral wall 20d of the container 20 in directions away from each other. That is, the lead wires W1, W2, W3 are taken out from the first terminal 24a and then bent into a substantially U-shape in a plan view, and the portions from the bent portions to the connection terminals T1, T2, T3 are the containers. It is routed along the inner peripheral wall 20d of 20. The lead wires W4, W5 are taken out from the second terminal 24b in a direction approaching the lead wires W1, W2, W3, and then bent into a substantially U shape in a plan view, and the connection terminals T4, T5 are respectively bent from the bent portions. Is routed along the inner peripheral wall 20d of the container 20 in a direction away from the lead wires W1, W2, W3. Therefore, even if either or both of the first connection line 26a and the second connection line 26b become longer, the first connection line 26a and the second connection line 26b may intersect with each other in a plan view. Instead, the first terminal 24a and the second terminal 24b can be electrically connected to the electric motor 40 in the container 20, respectively.

  In the present embodiment, the length dimension of lead wire W6 is relatively small. Therefore, the lead wire W6 is taken out from the second terminal 24b in a direction approaching the lead wires W1, W2, and W3, and then bent into an S-shape in plan view, and the connection terminal T6 is bent from the second bent portion. Are routed along the inner peripheral wall 20d of the container 20 in a direction approaching the lead wires W1, W2, W3. However, if the length dimension of the lead wire W6 is not small, it is desirable that the lead wire W6 is arranged similarly to the lead wires W4 and W5. That is, the lead wire W6 is also taken out from the second terminal 24b in a direction approaching the lead wires W1, W2, and W3, and then bent into a substantially U-shape in a plan view, and from each bent portion to the connection terminal T6. It is desirable that the portion be routed along the inner peripheral wall 20d of the container 20 in a direction away from the lead wires W1, W2, W3.

  At least one lead wire included in the first connection wire 26a is routed across the shortest straight line L1 that connects the first terminal 24a and the inner peripheral wall 20d of the container 20 in plan view. Similarly, at least one lead wire included in the second connection wire 26b is routed across the shortest straight line L2 that connects the second terminal 24b and the inner peripheral wall 20d of the container 20 in plan view. Specifically, the longest lead wire W1 among the plurality of lead wires included in the first connection wire 26a is routed across the straight line L1, and among the plurality of lead wires included in the second connection wire 26b. The longest lead wire W4 is routed across the straight line L2. Therefore, even if the length dimension of either or both of the first connection line 26a and the second connection line 26b becomes larger, the first connection line 26a and the second connection line 26b can be reliably separated from each other. it can.

  The first terminal 24a and the second terminal 24b each have three pins 71. For the connection between the first connection line 26a and the first terminal 24a and the connection between the second connection line 26b and the second terminal 24b, a cluster configured by covering the metal connection terminals with a resin cover, respectively. 72 is used. Since the connection to the three pins 71 can be performed at one time, workability is improved.

  In order to prevent misconnection between the first terminal 24a and the second terminal 24b, the cluster 72 is used for one of the first terminal 24a and the second terminal 24b, and the other terminal 24 is a metal without a cover. You may use the connection terminal made from. Further, in order to prevent the refrigerating machine oil 25 from accumulating in the cluster 72, metal connection terminals without a cover may be used for both the first terminal 24a and the second terminal 24b.

  Regarding the positional relationship between the connection terminal 47 at one end of the connection line 26, the cluster 72 at the other end of the connection line 26, and the discharge pipe 22, the discharge pipe 22 is disposed between the connection terminal 47 and the cluster 72 in plan view. However, in the present embodiment, the discharge pipe 22 is not arranged between the connection terminal 47 and the cluster 72 in a plan view. By adopting such a positional relationship, the connecting wire 26 can be more reliably separated from the discharge pipe 22. The same applies to the case where the cluster 72 is not used at the other end of the connection wire 26 and a metal connection terminal without a cover is used.

***Explanation of the effect of the embodiment***
In the present embodiment, the connecting wire 26 is routed along the inner peripheral wall 20d of the container 20. Therefore, even if the length of the connecting wire 26 is large, the connecting wires 26 do not intersect with each other, and a portion where the refrigerating machine oil 25 stays is unlikely to occur in the connecting wire 26.

  In the present embodiment, the first connection line 26a and the second connection line 26b electrically connected to the winding wire 44 of the stator 41 do not intersect and the first terminal 24a and the second terminal 24b of the container upper portion 20b are not crossed. Is connected to. Therefore, there is no intersection of the connection line 26 where the refrigerating machine oil 25 tends to stay, and the refrigerating machine oil 25 is less likely to be taken out of the compressor 12 together with the refrigerant gas from the discharge pipe 22. As a result, it is possible to prevent an increase in the oil circulation rate. As a result, it is possible to obtain both the high efficiency at the time of low-speed rotation and the enablement of operation at the high-speed rotation speed, and to obtain the highly reliable compressor 12.

***Other configurations***
In this embodiment, not only in the vertical compressor 12, but also in the horizontal compressor, the bowl-shaped closed container is press-fitted into the open portion of the cylindrical closed container, and the discharge pipe is provided at the center. It can also be applied in cases.

  The three lead wires forming the connecting wire 26, which are connected to the three pins of the terminal 24 in order to prevent the connecting wire 26 from coming into contact with the rotor 42 and breaking due to the slack of the connecting wire 26. May be bound together with a plastic sleeve. In that case, in order to suppress the accumulation of the refrigerating machine oil 25 in the sleeve, it is desirable that the length of the sleeve is 60% or less of the shortest lead wire. Specifically, the three lead wires W1, W2, W3 constituting the first connecting wire 26a have a length of 60% or less of the shortest lead wire W3 among these three lead wires W1, W2, W3. It is desirable to be bundled by a sleeve having a thickness. Similarly, the three lead wires W4, W5, W6 forming the second connecting wire 26b have a length of 60% or less of the shortest lead wire W6 among these three lead wires W4, W5, W6. It is desirable to be bound by a sleeve that has.

Embodiment 2.
Differences between the present embodiment and the first embodiment will be mainly described with reference to FIG. 7.

  In the present embodiment, the positional relationship between each terminal 24 and the corresponding plurality of connection terminals 47 is limited. That is, with respect to the straight line L3 connecting the center of the discharge pipe 22 of the container upper portion 20b and the center of the first terminal 24a, the winding 44 of the stator 41 of the electric motor 40 is in the first range that is an angle range of ±60°. And three connection terminals T1, T2, T3 respectively connecting the three lead wires W1, W2, W3 constituting the first connection wire 26a. Similarly, with respect to the straight line L4 connecting the center of the discharge pipe 22 of the container upper portion 20b and the center of the second terminal 24b, the winding of the stator 41 of the electric motor 40 is set in the second range that is an angle range of ±60°. Three connection terminals T4, T5, T6 which respectively connect 44 and the three lead wires W4, W5, W6 forming the second connection wire 26b are arranged. It is desirable that the first range and the second range do not overlap each other in a plan view.

  As described above, in the present embodiment, the plurality of connecting terminals 47 of the first connecting line 26a are respectively connected to the straight line L3 connecting the center of the first terminal 24a and the center of the discharging tube 22 in plan view with respect to the discharging tube 22. It is arranged within a range of ±60 degrees around the center of. Similarly, the plurality of connection terminals 47 of the second connection line 26b are within a range of ±60 degrees around the center of the discharge pipe 22 with respect to a straight line connecting the center of the second terminal 24b and the center of the discharge pipe 22 in plan view. It is located inside. Therefore, by connecting the first connecting wire 26a to the first terminal 24a and the second connecting wire 26b to the second terminal 24b, each lead wire included in the first connecting wire 26a and the second connecting wire 26b can be discharged. It is possible to avoid passing near 22. Therefore, the refrigerating machine oil 25 is less likely to be taken out of the compressor 12 together with the refrigerant gas from the discharge pipe 22. Further, the lead wires included in the first connecting wire 26a and the second connecting wire 26b can be easily connected without extending the lead wires more than necessary. Therefore, it is possible to prevent the connection line 26 from slackening inside the container 20 and coming into contact with the rotor 42 and breaking even without adding a new component such as a connecting material that connects the connection lines 26 to each other.

Embodiment 3.
In the first embodiment, the connecting wire 26 is connected to the winding wire 44 of the electric motor 40 via the connecting terminal 47. However, as shown in FIG. 8, the connecting wire 26 is integrated with the winding wire 44 of the electric motor 40. May be. That is, the connection wire 26 extended from the winding 44 of the electric motor 40 may be connected to the terminal 24.

Fourth Embodiment
In the first embodiment, the body portion 20a of the container 20 and the container lower portion 20c are connected by welding, but as shown in FIG. 9, the body portion 20a of the container 20 and the container lower portion 20c are integrally formed. Good.

  10 Refrigeration cycle device, 11 Refrigerant circuit, 12 Compressor, 13 Four-way valve, 14 First heat exchanger, 15 Expansion mechanism, 16 Second heat exchanger, 17 Control device, 20 Container, 20a Body part, 20b Container upper part, 20c lower container, 20d inner peripheral wall, 21 suction pipe, 22 discharge pipe, 23 suction muffler, 24 terminal, 24a first terminal, 24b second terminal, 25 refrigerating machine oil, 26 connection line, 26a first connection line, 26b second Connection line, 27 ring material, 28 rod, 29 oil separation plate, 30 compression mechanism, 31 cylinder, 32 rolling piston, 33 main bearing, 34 auxiliary bearing, 35 discharge muffler, 36 fastener, 40 electric motor, 41 stator, 42 Rotor, 43 Stator core, 44 Winding, 45 Rotor core, 46 Permanent magnet, 47 Connection terminal, 50 Crankshaft, 51 Eccentric shaft part, 52 Main shaft part, 53 Sub shaft part, 54 Through hole, 61 Cylinder chamber , 62 vane groove, 63 back pressure chamber, 64 vane, 71 pin, 72 cluster, L1 straight line, L2 straight line, L3 straight line, L4 straight line, T1 connecting terminal, T2 connecting terminal, T3 connecting terminal, T4 connecting terminal, T5 connecting terminal , T6 connection terminal, W1 lead wire, W2 lead wire, W3 lead wire, W4 lead wire, W5 lead wire, W6 lead wire.

Claims (6)

A compression mechanism for compressing the refrigerant,
An electric motor for driving the compression mechanism,
A container that houses the compression mechanism and the electric motor,
A first terminal and a second terminal attached to one axial end of the container;
A first connecting wire and a first connecting wire, which are routed along the inner peripheral wall of the container, electrically connect the first terminal and the second terminal to the electric motor in the container without intersecting each other in a plan view. A compressor with two connecting wires.   Each of the first connection line and the second connection line is a plurality of lead wires, and at least one lead wire included in the first connection line and at least one lead wire included in the second connection line. 2. The compressor according to claim 1, wherein the compressors are taken out from the first terminal and the second terminal in a direction in which they approach each other, and are then routed in a direction in which they separate from each other along the inner peripheral wall of the container.   The compression according to claim 2, wherein at least one lead wire included in the first connecting wire is routed across a shortest straight line connecting the first terminal and the inner peripheral wall of the container in a plan view. Machine.   Each of the first connecting wire and the second connecting wire is a plurality of lead wires, and the plurality of lead wires has a length of 60% or less of the shortest lead wire among the plurality of lead wires. The compressor of claim 1, which is bundled by. In order to discharge the refrigerant to the outside of the container, further comprising a discharge pipe provided at a position overlapping with the central axis of the container at one axial end of the container,
The first terminal and the second terminal are attached at a position displaced from the central axis of the container at one axial end of the container,
The first connecting wire and the second connecting wire are a plurality of lead wires, respectively, and a plurality of connecting terminals connected to the electric motor are provided at ends of the plurality of lead wires, and the first connecting wire is provided. And the plurality of connection terminals of the second connection line are ±60 around the center of the discharge pipe with respect to a straight line connecting the centers of the first terminal and the second terminal and the center of the discharge pipe in plan view. The compressor according to claim 1, wherein the compressor is arranged within a range of degrees.   A refrigeration cycle apparatus comprising the compressor according to claim 1.

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