WO2019030841A1

WO2019030841A1 - Compressor and refrigeration cycle device

Info

Publication number: WO2019030841A1
Application number: PCT/JP2017/028883
Authority: WO
Inventors: 聡経新井; 尚久五前; 佐々木　亮; 敏充飯田; 久保　健一
Original assignee: 三菱電機株式会社
Priority date: 2017-08-09
Filing date: 2017-08-09
Publication date: 2019-02-14
Also published as: KR102320908B1; CZ309325B6; CN111033052A; CZ202011A3; JP6746000B2; JPWO2019030841A1; KR20200020860A; CN111033052B

Abstract

A compressor, wherein a plurality of terminals (24) are attached to one axial-direction end of a container (20) in a manner such that when seen from a planar view, the centers of each of the terminals (24) are located within an angular range (R1) which is no greater than 180° and is formed by a first straight line (L1) passing through the center (P0) of the container (20) and the center (P1) of a first terminal (24a), and a second straight line (L2) passing through the center (P0) of the container (20) and the center (P2) of a second terminal (24b). A plurality of connecting wires (26) electrically connect an electric motor and the plurality of terminals (24) inside the container (20). When seen from the planar view, the plurality of connecting wires (26) are drawn from the plurality of terminals (24) to within the angular range (R1).

Description

Compressor and refrigeration cycle device

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

In a hermetic rotary compressor, which is an example of a rotary compressor, internal components such as a motor and a compression mechanism are accommodated in a welded integrated hermetic container. A discharge pipe for discharging the refrigerant and an airtight terminal connected to the internal stator via a lead wire are provided on the upper part of the sealed container.

Generally, a hermetic container of a rotary compressor is provided with one airtight terminal. However, by providing two airtight terminals, it is possible to reduce the current flowing to the airtight terminals and the lead wire, and to switch the wire connection method of the motor winding.

Patent Document 1 describes a technique in which a first lead wire is drawn in a counterclockwise direction and connected to a first terminal, and a second lead wire is drawn in a clockwise direction and connected to a second terminal. ing.

JP, 2010-53786, A

In the technique described in Patent Document 1, the rising portions from the motor of the first and second lead wires are provided on the side opposite to the first and second terminals with respect to the discharge pipe. Therefore, it is necessary to increase the length of the first and second lead wires in accordance with the sizes of the discharge pipe and other parts provided in the central portion of the closed container.

An object of the present invention is to shorten a length of a plurality of connection lines for electrically connecting a plurality of terminals attached to a container of a compressor and an electric motor stored in the container of the compressor.

A compressor according to one aspect of the present invention is
A compression mechanism for compressing a refrigerant;
An electric motor for driving the compression mechanism;
A container for containing the compression mechanism and the motor;
A first straight line including a first terminal and a second terminal and attached to one axial end of the container, the first straight line having a center passing through a center of the container and a center of the first terminal in plan view; A plurality of terminals located within an angle range of 180 ° or less formed by a second straight line passing through the center of the second terminal and the center of the second terminal;
The plurality of terminals and the motor are electrically connected in the container, and a plurality of connection lines extracted from the plurality of terminals in the angle range in plan view are provided.

In the present invention, each connecting wire electrically connecting each terminal and the motor is, in plan view, a first straight line passing through the center of the container and the center of the first terminal, the center of the container and the center of the second terminal It is taken out within an angle range of 180 ° or less formed by the passing second straight line. Therefore, the length of each connection line can be shortened.

1 is a circuit diagram of a refrigeration cycle apparatus according to Embodiment 1. FIG. 1 is a circuit diagram of a refrigeration cycle apparatus according to Embodiment 1. FIG. 1 is a longitudinal sectional view of a compressor according to Embodiment 1. FIG. Fig. 2 is a cross-sectional view of a part of the compressor according to the first embodiment. FIG. 2 is a plan view of a part of the compressor according to Embodiment 1. FIG. 2 is a longitudinal sectional view of part of the compressor according to Embodiment 1; FIG. 2 is a partial vertical cross-sectional view of a part of the compressor according to Embodiment 1. FIG. 2 is a side view of part of the compressor according to Embodiment 1; FIG. 2 is a bottom view of a part of the compressor according to Embodiment 1. FIG. 2 is a diagram showing a connection method of connection lines at the time of assembly of a compressor according to Embodiment 1. The figure which shows the connection method of the connecting wire at the time of the assembly of the compressor concerning a comparative example. FIG. 2 is a plan view of a part of the compressor according to Embodiment 1. The top view of a part of compressor concerning a comparative example. The graph which shows the comparison result of the deformation with respect to the internal pressure of the container upper part of the compressor which concerns on Embodiment 1 and a comparative example. FIG. 7 is a plan view of a portion of a compressor according to a second embodiment. FIG. 9 is a longitudinal sectional view of a compressor according to a third embodiment. FIG. 10 is a longitudinal sectional view of a compressor according to a fourth embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals. In the description of the embodiment, the description of the same or corresponding parts will be omitted or simplified as appropriate. The present invention is not limited to the embodiments described below, and various modifications can be made as needed. 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
The present embodiment will be described with reference to FIGS. 1 to 14.

*** Description of the configuration ***
The configuration of a 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 in the cooling operation. FIG. 2 shows the refrigerant circuit 11 in the heating operation.

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

The refrigeration cycle apparatus 10 includes a refrigerant circuit 11 in which a refrigerant circulates. The refrigeration cycle apparatus 10 includes a compressor 12, a four-way valve 13, a first heat exchanger 14 which is an outdoor heat exchanger, an expansion mechanism 15 which is an expansion valve, and a second heat exchanger which is an indoor heat exchanger. And 16. 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 flow direction of the refrigerant between the cooling operation and the heating operation. The first heat exchanger 14 operates as a condenser during the cooling operation, and dissipates 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 at the time of heating operation, performs heat exchange between outdoor air and the refrigerant expanded by the expansion mechanism 15, and heats the refrigerant. The expansion mechanism 15 expands the refrigerant that has dissipated heat in the condenser. The second heat exchanger 16 operates as a condenser during heating operation, and dissipates 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, performs heat exchange between room air and the refrigerant expanded by the expansion mechanism 15, and heats the refrigerant.

The refrigeration cycle apparatus 10 further includes a controller 17.

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

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

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

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

The compressor 12 is a hermetic 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.

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

The motor 40 is housed in the container 20. Specifically, the motor 40 is installed at the upper inside of the container 20. The motor 40 is a concentrated winding motor in the present embodiment, but may be a distributed winding motor.

The compression mechanism 30 is housed in the container 20. Specifically, the compression mechanism 30 is installed at the lower inside of the container 20. That is, the compression mechanism 30 is disposed below the motor 40 in the container 20.

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

The refrigeration oil 25 is pumped up by the oil supply mechanism such as an oil pump provided at the lower part of the crankshaft 50 as the crankshaft 50 rotates. The refrigeration oil 25 is supplied to the sliding parts of the compression mechanism 30 to lubricate the sliding parts of the compression mechanism 30. As the refrigerator oil 25, POE, PVE or AB which is a synthetic oil is used. "POE" is an abbreviation of Polyolester. "PVE" is an abbreviation for Polyvinyl Ether. "AB" is an abbreviation of Alkylbenzene.

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

The crankshaft 50 has an eccentric shaft 51, a main shaft 52, and a countershaft 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 D0. 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 each have a cylindrical shape. The main shaft portion 52 and the sub shaft portion 53 are provided such that the central axes thereof coincide with each other, that is, coaxially. The eccentric shaft portion 51 is provided such that the central axis thereof is offset from the central axes of the main shaft portion 52 and the auxiliary shaft portion 53. When the main shaft portion 52 and the sub shaft portion 53 rotate around the central axis, the eccentric shaft portion 51 eccentrically rotates.

Hereinafter, the details of the container 20 will be described.

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

The body 20a is cylindrical. The container upper part 20b is closing the upper opening of the trunk | drum 20a. The container upper portion 20 b corresponds to one axial end of the container 20. The lower part 20c of the container is closing the lower opening of the body 20a. The container lower portion 20 c 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 20a and the container lower portion 20c are connected by welding, whereby the container 20 is sealed. The body 20 a is provided with a suction pipe 21 connected to the suction muffler 23. A discharge pipe 22 is provided in the container upper portion 20b.

The details of the motor 40 will be described below.

The 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 of Direct Current.

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

The stator 41 is cylindrical and fixed so as to be in contact with the inner circumferential surface of the container 20. The rotor 42 has a cylindrical shape, and is installed inside the stator 41 with an air gap. The width of the air gap 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 magnetic steel sheets containing iron as a main component into a predetermined shape, laminating them in the axial direction D0, and fixing them by caulking. The thickness of each electromagnetic steel sheet is, for example, 0.1 mm or more and 1.5 mm or less. The stator core 43 has an outer diameter larger than the inner diameter of the body 20 a of the container 20, and is fixed to the inside of the body 20 a of the container 20 by shrink fitting. The windings 44 are wound around a stator core 43. Specifically, the winding 44 is wound in a concentrated manner around the stator core 43 via an insulating member. The winding 44 comprises a core wire and at least one layer of coating covering the core wire. In the present embodiment, the material of the core wire is copper. The material of the film is AI / EI. "AI" is an abbreviation of Amide-Imide. "EI" is an abbreviation of Ester-Imide. The material of the insulating member is PET. "PET" is an abbreviation for Polyethylene Terephthalate.

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

The rotor 42 has a rotor core 45 and permanent magnets 46. Similar to the stator core 43, the rotor core 45 is manufactured by punching a plurality of magnetic steel sheets containing iron as a main component into a predetermined shape, laminating them in the axial direction D0, and fixing them 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 magnets 46 are 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.

In addition, the method of fixing the electromagnetic steel plates of the rotor core 45 is not limited to caulking, and other methods such as welding may be used.

At the center in plan view of the rotor core 45, an axial hole is formed in which the main shaft portion 52 of the crankshaft 50 is shrink-fit or press-fitted. 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, around the shaft hole of the rotor core 45, a plurality of through holes penetrating in the axial direction D0 are formed. Each through hole is one of the passages of the gas refrigerant discharged from the discharge muffler 35 described later to the space in the container 20. Each through hole also serves as one of the passages for dropping the refrigerator oil 25 led to the upper part of the container 20 to the lower part of the container 20.

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

The container upper portion 20b is provided with a terminal 24 connected to an external power supply such as an inverter device, and a rod 28 to which a cover for protecting the terminal 24 is attached. Specifically, the terminal 24 is an airtight terminal such as a glass terminal. In the present embodiment, the terminal 24 is fixed to the container 20 by welding. The terminal 24 is connected to a connecting wire 26 extended from the winding 44 of the motor 40. Thus, the terminal 24 and the motor 40 are electrically connected.

Furthermore, the discharge pipe 22 which the axial direction both ends opened is provided in the container upper part 20b. The gas refrigerant discharged from the compression mechanism 30 sequentially passes through the rotor 42 and the oil separation plate 29 above the rotor 42, and from the space in the container 20 to the external refrigerant circuit 11 through the discharge pipe 22. It is discharged.

The oil separating plate 29 separates the refrigerating machine oil 25 in the container 20 pumped up 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 at high speed as the rotor 42 rotates. The refrigeration oil 25 has a specific gravity larger than that of the refrigerant. Therefore, the oil separation plate 29 can separate the refrigerator oil 25 by flying it in the outer peripheral direction by centrifugal force.

The discharge pipe 22 may be installed at the outer peripheral portion of the container upper portion 20b, but in the present embodiment, it is installed at the center of the container upper portion 20b just above the crankshaft 50. Assuming that the discharge pipe 22 is installed on the outer peripheral portion of the container upper portion 20b, the refrigerator oil 25 separated by the oil separating plate 29 enters the discharge pipe 22 and is discharged to the outside of the container 20. The amount of refrigeration oil 25 may be reduced, and the lubricity of the compression mechanism 30 may be reduced. In order to prevent such a decrease in lubricity, it is desirable that the discharge pipe 22 be installed at the center of the upper portion 20b of the container.

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

FIG. 4 shows a cross section of a portion of the compressor 12 as viewed along the axial direction D0. In FIG. 4, hatching representing a cross section is omitted.

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

The inner periphery 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 suctioning the gas refrigerant from the refrigerant circuit 11 is provided on the outer peripheral surface of the cylinder 31. The refrigerant drawn from the suction port is compressed in the cylinder chamber 61. Both ends in the axial direction of the cylinder 31 are open.

The rolling piston 32 is ring-shaped. 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 on an eccentric shaft portion 51 of a crankshaft 50 which is a rotation shaft of the rolling piston 32.

The cylinder 31 is provided with vane grooves 62 connected to the cylinder chamber 61 and extending in the radial direction. On the outside of the vane groove 62, a back pressure chamber 63 which is a circular space in plan view connected to the vane groove 62 is formed. In the vane groove 62, a vane 64 for separating the cylinder chamber 61 into a suction chamber, which is a low pressure operating chamber, and a compression chamber, which is a high pressure operating chamber, is installed. The vanes 64 are in the form of a plate whose tip is rounded. The vanes 64 reciprocate while sliding in the vane grooves 62. The vanes 64 are always pressed against the rolling piston 32 by vane springs provided in the back pressure chamber 63. Since the inside of the container 20 has a high pressure, when the operation of the compressor 12 is started, a force due to the difference between the pressure in the container 20 and the pressure in the cylinder chamber 61 on the back of the vane which is the surface on the back pressure chamber 63 side of the vane 64 Works. Therefore, the vane spring is mainly used for the purpose of pressing the vane 64 against the rolling piston 32 when the compressor 12 starts with no difference in pressure in the container 20 and in the cylinder chamber 61.

The main bearing 33 is a reverse T-shaped bearing in a side view. The main bearing 33 is slidably fitted on a main shaft portion 52 which is a portion above the eccentric shaft portion 51 of the crankshaft 50. A through hole 54 serving as an oil supply passage is provided along the axial direction D0 inside the crankshaft 50, and is sucked through the through hole 54 between the main bearing 33 and the main shaft portion 52. An oil film is formed by the supply of the refrigerating machine oil 25. The main bearing 33 closes the upper side of the cylinder chamber 61 and the vane groove 62 of the cylinder 31. That is, the main bearing 33 closes the upper side of the two working chambers in the cylinder 31.

The auxiliary bearing 34 is a T-shaped bearing in a side view. The sub bearing 34 is slidably fitted in a sub shaft portion 53 which is a portion below the eccentric shaft portion 51 of the crankshaft 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 crankshaft 50. The sub bearing 34 closes the lower side of the cylinder chamber 61 and the vane groove 62 of the cylinder 31. That is, the sub bearing 34 closes the lower side 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, respectively, and support a crankshaft 50 which is a rotation shaft of the rolling piston 32. The main bearing 33 supports the main shaft 52 without contacting the main shaft 52 by fluid lubrication of the oil film between the main bearing 33 and the main shaft 52. The secondary bearing 34 supports the secondary shaft 53 without contacting the secondary shaft 53 by fluid lubrication of the oil film between the secondary bearing 34 and the secondary shaft 53 as the main bearing 33 does.

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 at a position where it is connected to the compression chamber when the cylinder chamber 61 is divided by the vane 64 into a suction chamber and a compression chamber. The main bearing 33 is attached with a discharge valve that closes the discharge port so as to open and close. The discharge valve is closed until the gas refrigerant in the compression chamber reaches a desired pressure, and is opened when the gas refrigerant in the compression chamber reaches a desired pressure. Thereby, 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, high-pressure gas refrigerant discharged when the discharge valve is opened enters the discharge muffler 35 and is then discharged from the discharge muffler 35 into the space in the container 20.

The discharge port and the discharge valve may be provided in the sub bearing 34 or both the main bearing 33 and the sub bearing 34. The discharge muffler 35 is attached to the outside of the bearing on which the discharge port and the discharge valve are provided.

An intake muffler 23 is provided beside the container 20. The suction muffler 23 sucks the low-pressure gas refrigerant from the refrigerant circuit 11. The suction muffler 23 prevents 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 in a position to be connected to the suction chamber when the cylinder chamber 61 is divided by the vane 64 into the suction chamber and the compression chamber. The main body of the suction muffler 23 is fixed to the side surface of the body 20 a of the container 20 by welding or the like.

The material of the eccentric shaft portion 51, the main shaft portion 52 and the countershaft portion 53 of the crankshaft 50 is a cast material or a forged material. The material of the main bearing 33 and the auxiliary 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, and specifically, an 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 vanes 64 are provided integrally with the rolling piston 32. When the crankshaft 50 is driven, the vanes 64 reciprocate along the grooves of a support rotatably mounted on the rolling piston 32. The vanes 64 radially advance and retract while oscillating as the rolling piston 32 rotates, thereby dividing the inside of the cylinder chamber 61 into a compression chamber and a suction chamber. The support is constituted by two columnar members having a semicircular cross section. The support is rotatably fitted in a circular holding hole formed at 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 motor 40 via the connection line 26. As a result, current flows through the windings 44 of the stator 41, and magnetic flux is generated from the windings 44. The rotor 42 of the motor 40 is rotated by the action of the magnetic flux generated from the winding 44 and the magnetic flux generated from the permanent magnet 46 of the rotor 42. Specifically, the rotor 42 is rotated by the attraction and repulsion between the rotating magnetic field generated by the flow of current through the winding 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. As the crankshaft 50 rotates, 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. As the crankshaft 50 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 23 through the suction pipe 21 by gradually expanding the volume. In the compression chamber, the volume of the gas refrigerant is gradually reduced by gradually reducing the volume. The compressed, high-pressure and high-temperature gas refrigerant is discharged from the discharge muffler 35 into the space in the container 20. The discharged gas refrigerant further passes through the electric motor 40 and is discharged from the discharge pipe 22 in the container upper portion 20 b to the outside of the container 20. The refrigerant discharged out of the container 20 returns to the suction muffler 23 again through the refrigerant circuit 11.

*** Description of configuration details ***
The details of the configuration of the compressor 12 according to the present embodiment will be described with reference to FIGS. 5 to 13 in addition to FIG. 3.

FIG. 5 shows a top view of a portion of the compressor 12 as viewed along the axial direction D0. FIG. 6 shows a cross section of a portion of the compressor 12 as viewed along a first direction D1 orthogonal to the axial direction D0. FIG. 7 shows a front view and a cross section of a portion of the compressor 12 as viewed along a second direction D2 orthogonal to the axial direction D0 and the first direction D1. FIG. 8 shows a side view of a portion of the compressor 12 as viewed along the first direction D1. In FIG. 8, the terminal 24 is omitted.

The container upper part 20b connected to the trunk | drum 20a is circular shape in planar view. A discharge pipe 22 is provided at the center of the container upper portion 20b. A first flat surface portion 81, a second flat surface portion 82, and a curved surface portion 83 are formed on the surface of the container upper portion 20b.

The first flat portion 81 is provided with a plurality of terminals 24. Each terminal 24 is electrically connected to the motor 40 in the container 20. Each terminal 24 is fitted in a through hole provided in the first flat portion 81. The outermost shell of each terminal 24 is in contact with the inner peripheral edge of the through hole.

The second flat portion 82 is provided with a rod 28 perpendicular to the second flat portion 82.

The outer diameter of the discharge pipe 22 provided at the central portion of the container upper portion 20b is desirably 0.1 times or more the outer diameter of the container upper portion 20b. The outer diameter of the discharge pipe 22 is preferably 0.2 or less times the outer diameter of the container upper portion 20b.

The surface of the curved surface portion 83 is composed of a plurality of curved surfaces. The curved surface portion 83 has a shape similar to a partially missing hemisphere.

The edges of the first flat surface portion 81 and the second flat surface portion 82 are connected to the curved surface portion 83 by the concave portion 84 which is smoothly curved. That is, portions between the first flat surface portion 81 and the second flat surface portion 82 and the curved surface portion 83 are recessed. The recess 84 is formed thick and has a function as a rib for improving the strength.

The first flat surface portion 81 is inclined at a first inclination angle θ1 in a direction away from the virtual vertical plane with respect to a virtual vertical surface formed in the upper end or upper opening of the cylindrical body portion 20a and orthogonal to the axial direction D0. ing. The first inclination angle θ1 is desirably 5 ° or more and 30 ° or less, and is 5 ° in the present embodiment. One end 81 a of the first flat surface 81 protrudes outward beyond the curved surface 83. The distance from one end 81 a of the first flat surface 81 to the imaginary vertical plane is longer than the distance from the other end 81 b of the first flat surface 81 to the imaginary vertical plane. The shape of the container upper portion 20b between the outermost shell of the terminal 24 and the outer peripheral wall of the discharge pipe 22 by connecting the first flat surface portion 81 inclined at the first inclination angle θ1 with the curved surface portion 83 by the concave portion 84 And the distance along the shape of the container top 20b between the outermost shell of the terminals 24 and the inner circumferential wall of the container top 20b.

Thus, the first plane portion 81 is inclined with respect to the virtual vertical plane. The first flat surface portion 81 is smoothly connected to the curved surface portion 83 by the concave portion 84. Therefore, even when the distance between the terminal 24 and the discharge pipe 22 is maintained in plan view, the distance along the shape of the container upper portion 20b between the outermost shell of the terminal 24 and the outer peripheral wall of the discharge pipe 22 And, the distance along the shape of the container upper portion 20b between the outermost shell of the terminal 24 and the inner peripheral wall of the container upper portion 20b is extended. By increasing the first inclination angle θ1 of the first flat surface 81, one end 81a of the first flat surface 81 is further separated from the curved surface 83, and one end 81a of the first flat surface 81 is It protrudes beyond the curved surface portion 83, and the distance to the virtual vertical surface is increased. Therefore, the distance along the surface of the container upper portion 20b from the terminal 24 to the discharge pipe 22 is further extended.

In plan view, the container upper portion 20b has a diameter of 100 mm, the distance between the outermost shell of the terminal 24 and the outer peripheral wall of the discharge pipe 22 is less than 3 mm, and the outermost shell of the terminal 24 between the inner peripheral wall of the container upper 20b Distance of less than 5 mm. In this case, if the first flat portion 81 is not inclined, the distance between the outermost shell of the terminal 24 and the outer peripheral wall of the discharge pipe 22, and the outermost shell of the terminal 24 and the inner peripheral wall of the container upper portion 20b The distance between the two can not be secured enough. That is, it is not possible to design according to the specification of the insulation distance. If the first flat portion 81 is inclined at the first inclination angle θ1, the distance between the outermost shell of the terminal 24 and the outer peripheral wall of the discharge pipe 22 is 3 mm or more, and the outermost shell of the terminal 24 and the container upper portion 20b 5 mm or more can be secured between the inner circumferential wall of That is, the design according to the specification of the insulation distance is possible. If the first inclination angle θ1 of the first flat portion 81 is within the range of 5 ° to 30 ° with respect to the virtual vertical plane, the distance between the outermost shell of the terminal 24 and the outer peripheral wall of the discharge pipe 22; And, the distance between the outermost shell of the terminal 24 and the inner peripheral wall of the container upper portion 20b is secured.

As described above, the discharge pipe 22 is provided at a position overlapping the central axis of the container 20 at one end in the axial direction of the container 20. The container 20 has a curved surface portion 83 in which the discharge pipe 22 is disposed, and a first flat portion 81 in which the plurality of terminals 24 are disposed at one axial end of the container 20. The first flat portion 81 is virtually perpendicular to the central axis of the container 20 along at least one direction with respect to a virtual vertical plane perpendicular to the axial direction D0, which is located between the plurality of terminals 24 and the motor 40. Inclined at an inclination angle away from the surface.

In the present embodiment, the first flat portion 81 is inclined at an inclination angle away from the virtual vertical plane as approaching the central axis of the container 20 along the two directions with respect to the virtual vertical plane.

Specifically, at least a portion of the first flat portion 81 including one end of the first direction D1 orthogonal to the axial direction D0 is the central axis of the container 20 along the first direction D1 with respect to the virtual vertical plane. As it approaches, it inclines at the 1st inclination angle (theta) 1 which leaves | separates from a virtual vertical surface. In the present embodiment, the entire first flat surface portion 81 is inclined at the first inclination angle θ1 with respect to the virtual vertical plane along the first direction D1. Thus, a part of the first flat portion 81 including one end in the first direction D1 is farther from the virtual vertical plane as it approaches the central axis of the container 20 along the first direction D1. The remaining portion of the first flat portion 81 including the other end in the first direction D1 is farther from the virtual vertical plane as it goes away from the central axis of the container 20 along the first direction D1. As described above, the first inclination angle θ1 is desirably 5 ° or more and 30 ° or less, and is 5 ° in the present embodiment.

Further, at least a portion of the first flat portion 81 including one end of the second direction D2 orthogonal to the axial direction D0 and the first direction D1 is the center of the container 20 along the second direction D2 with respect to the virtual vertical plane. As it approaches the axis, it inclines at a second inclination angle θ2 that is away from the virtual vertical plane. In the present embodiment, the entire first flat surface portion 81 is inclined at a second inclination angle θ2 with respect to the virtual vertical plane along the second direction D2. Thus, a part of the first flat portion 81 including one end in the second direction D2 is farther from the virtual vertical plane as it approaches the central axis of the container 20 along the second direction D2. The remaining portion of the first flat portion 81 including the other end in the second direction D2 is farther from the virtual vertical plane as it goes away from the central axis of the container 20 along the second direction D2. When the length dimension of the first flat portion 81 in the first direction D1 is different from the length dimension of the first flat portion 81 in the second direction D2, the second tilt angle θ2 is different from the first tilt angle θ1. Is desirable. That is, if the distance from one end to the other end of first flat portion 81 in the second direction D2 is larger than the distance from one end to the other end in first direction D1 of first flat portion 81, the second inclination angle θ2 Is desirably smaller than the first inclination angle θ1. If the distance from one end to the other end of the first flat portion 81 in the second direction D2 is smaller than the distance from one end to the other end in the first direction D1 of the first flat portion 81, the second inclination angle θ2 is It is desirable to be larger than the first inclination angle θ1. This is because the steeper the slope, the shorter the distance can be obtained. If the height can be obtained, it will be easier to secure the distance and the area. The second inclination angle θ2 is desirably 5 ° or more and 30 ° or less, and is 10 ° in the present embodiment.

Note that at least one of the first inclination angle θ1 and the second inclination angle θ2 of the first flat surface portion 81 may be different in each region where the terminal 24 is provided. That is, the inclination angle of the first flat portion 81 may be different for each of the terminals 24.

When the refrigerant compressed in the compression mechanism 30 is discharged into the space in the container 20, the container 20 receives an outward force by the high temperature and high pressure gas refrigerant. In the body portion 20a, the cylindrical portion of the body portion 20a can reduce stress concentration due to the outward force. In the lower container portion 20c, the hemispherical or dome-shaped lower container portion 20c can reduce stress concentration due to an outward force. In the container upper portion 20b, the first flat portion 81 is inclined, and one end 81a of the first flat portion 81 protrudes outward beyond the curved surface portion 83 and extends to a position higher than the center of the container upper portion 20b There is. Further, the first flat surface portion 81 and the curved surface portion 83 are connected by the concave portion 84 which is smoothly curved. Therefore, when the distance between the plurality of terminals 24 provided in the first flat portion 81 and the discharge pipe 22 provided in the center of the container upper portion 20b is that the surface of the container upper portion 20b is flat, and the container upper portion 20b This is more than if the surface of the is hemispherical. The recess 84 is formed thick and has a function as a rib. Therefore, even if the pressure in the container 20 rises, the stress is not easily concentrated, and the deformation of the container upper portion 20b is suppressed. That is, in the container upper portion 20b, the first flat surface portion 81 is flat, and the curved surface portion 83 approximates to a hemispherical shape partially missing, and the concave portion 84 connecting the first flat surface portion 81 and the curved surface portion 83. Is formed thick and smoothly curved, stress concentration due to outward force can be reduced.

In the present embodiment, one axial end of the container 20 is circular in plan view. The outer diameter of the discharge pipe 22 is at least 0.1 times the outer diameter of one axial end of the container 20. The first flat surface portion 81 is inclined, and the distance between the terminal 24 provided on the first flat surface portion 81 and the discharge pipe 22 provided on the curved surface portion 83 is extended. Therefore, even when the discharge pipe 22 having a large diameter of 0.1 times or more of the outer diameter of the container upper portion 20b is used, the terminal 24 and the discharge pipe 22 can be disposed sufficiently apart from each other.

Although the rod 28 to which the cover for covering the terminal 24 is attached may be disposed in the first flat portion 81, it is disposed in the second flat portion 82 in the present embodiment. The rod 28 is extended to a position higher than the curved portion 83 of the container upper portion 20b. Therefore, the arrangement and mounting operation of the terminal 24 and the rod 28 are easy. The attachment of the cover to the rod 28 is also facilitated. Accessories such as a temperature sensor may be attached to the second flat portion 82. In the present embodiment, the second flat portion 82 is lower than the top of the first flat portion 81 by the distance H1. Therefore, when the temperature sensor is attached to the second flat portion 82, the temperature sensor can be disposed at a position near the compression mechanism 30. As the temperature sensor is closer to the compression mechanism 30, the temperature change of the refrigerant discharged from the compression mechanism 30 can be detected earlier, even when the circulation flow rate of the refrigerant is small.

As described above, the container 20 has the second flat portion 82 in which the rod 28 is disposed at one axial end of the container 20. A cover for covering the plurality of terminals 24 is attached to the rod 28. The second flat portion 82 may be inclined with respect to the virtual vertical plane, but in the present embodiment, is parallel to the virtual vertical plane. The rod 28 is provided perpendicularly to the second flat portion 82. That is, the rod 28 is provided to extend along the axial direction D0. In the second flat portion 82, accessories different from the plurality of terminals 24 and the rod 28 may be disposed. When an accessory such as a temperature sensor is disposed in the second flat portion 82, it is desirable that the maximum distance from the virtual vertical plane of the second flat portion 82 be closer than the first flat portion 81.

In the present embodiment, resistance welding is used as a method of attaching the discharge pipe 22 to the container upper portion 20b. As shown in FIG. 3, the discharge pipe 22 is joined to the curved surface portion 83 via the ring member 85. The material of the ring member 85 is iron. By attaching the ring member 85 to the discharge pipe 22 and pressing the inclined portion of the ring member 85 against the container upper portion 20b, the container upper portion 20b contacts the entire periphery of the ring member 85 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 member 85 in the container 20. As described above, by causing the discharge pipe 22 to protrude toward the compression mechanism 30 more than the ring material 85, it is possible to suppress the refrigerator oil 25 trapped in the inclined portion of the ring material 85 from entering the discharge pipe 22.

The method of attaching the discharge pipe 22 to the container upper portion 20b is not limited to resistance welding, and may be other methods such as gas welding using a brazing material or laser welding. However, gas welding has a large heat input and a wide heat input range. Therefore, when the plurality of terminals 24 are attached by resistance welding after the discharge pipe 22 is attached by gas welding, distortion may occur on the surface of the portion of the container upper portion 20b to which the terminals 24 are attached. If distortion occurs, the surface of the container upper portion 20b and the surface of the terminal 24 do not come in contact with each other, which may cause welding defects during resistance welding. Therefore, also in the welding of the discharge pipe 22, it is desirable to reduce the heat input and the heat input range by using resistance welding or laser welding.

FIG. 9 shows the underside of a portion of the compressor 12 as viewed from inside the vessel 20 along the axial direction D0.

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

The plurality of terminals 24 have a first straight line L1 whose center passes through the center P0 of the container 20 and the center P1 of the first terminal 24a, and the center P0 of the container 20 and the center P2 of the second terminal 24b in plan view. It is attached to one axial direction end of the container 20 so as to be located within an angle range R1 of 180 ° or less formed by the second straight line L2 passing through. In the present embodiment, the plurality of terminals 24 are collectively arranged on the first flat portion 81 of the container upper portion 20b.

The plurality of connection lines 26 electrically connect the plurality of terminals 24 and the motor 40 in the container 20.

The plurality of connection lines 26 include a first connection line 26 a electrically connecting the first terminal 24 a and the motor 40, and a second connection line 26 b electrically connecting the second terminal 24 b and the motor 40. In the case where the plurality of terminals 24 include another terminal 24 different from the first terminal 24a and the second terminal 24b, another plurality of connecting wires 26 may be used to electrically connect the other terminal 24 to the motor 40. Connecting lines 26 may be included.

The plurality of connection lines 26 are extracted from the plurality of terminals 24 into the angular range R1 in plan view. Specifically, the portion of each connecting wire 26 following the end connected to each terminal 24 is taken out of the existing range R2 of each terminal 24 at a position within the angular range R1 in plan view. The existence range R2 of each terminal 24 is a region surrounded by an outline formed by the outermost shell of each terminal 24 in a plan view. Although the presence range R2 of each terminal 24 may be an area of any shape, it is a circular area in the present embodiment. The connecting wire 26 extends from the end of the connecting wire 26 connected to the certain terminal 24 and the connecting wire 26 extends from the end of the connection range 26 of the terminal 24 in plan view. It is the position being taken out. In the present embodiment, the plurality of connection lines 26 are routed such that this position falls within the angular range R1 for all the connection lines 26. Therefore, the lengths of the plurality of connection lines 26 can be shortened. Also, the wiring space can be reduced. In order to reduce the wiring space as much as possible, it is desirable that the plurality of connection lines 26 be disposed within the angular range R1 in plan view. That is, it is desirable that the plurality of connection lines 26 be routed so that the whole of all the connection lines 26 falls within the angle range R1.

If the position at which each connecting wire 26 is taken out from each terminal 24 is within the angular range R1, the direction in which each connecting wire 26 is taken out from each terminal 24 may be any direction, but in the present embodiment, each connecting wire 26 is taken out toward the center of the angle range R1. That is, the first connection line 26a and the second connection line 26b are on the third straight line L3 passing through the center P0 of the container 20 and the midpoint P3 of the center P1 of the first terminal 24a and the center P2 of the second terminal 24b. It is taken out in the approaching direction. Therefore, the wiring space can be made smaller.

As described above, in the present embodiment, the angular range R1 formed by a straight line passing the center of the container upper portion 20b and the centers of the plurality of terminals 24 is 180 ° or less. The range of the extraction direction of each connection line 26 connected to each terminal 24 corresponds to the angle range R1. In FIG. 10, before the body portion 20a and the container upper portion 20b are connected, the connection line 26 extended from the stator 41 is connected to the terminal 24 via the cluster 72 inside the container upper portion 20b. . Thereafter, the point P4 of the body 20a in the angle range R1 and the point P5 of the container upper portion 20b are aligned, and the point P6 of the body 20a and the point P7 of the container upper portion 20b on the opposite side are aligned. The container upper portion 20b is fixed to the body 20a by welding so as to cover the opening of the body 20a. When the point P4 of the barrel 20a and the point P5 of the container upper portion 20b are aligned and the point P6 of the barrel 20a and the point P7 of the container upper portion 20b are aligned, each connecting line 26 is extended from the stator 41 The point is also on the point P4 side, that is, within the angle range R1. Therefore, each connection line 26 can be connected to each terminal 24 at the shortest.

According to the above-described wire connection method, the compressor 12 can be assembled without causing the connecting wire 26 to extend in the container 20 without extending the connecting wire 26 more than necessary.

As in the comparative example shown in FIG. 11, the connecting line 26 is fixed when the take-out direction of the connecting line 26 connected to a certain terminal 24 is out of the angle range R1 and the body 20a and the container upper portion 20b are aligned. In the case where the portion extended from the child 41 is also out of the angle range R1, the connecting wire 26 or the other connecting wire 26 is extended more than necessary, and a slack occurs in the container 20. In this comparative example, the second connection line 26b connected to the second terminal 24b is more than necessary because the extraction direction of the first connection line 26a connected to the first terminal 24a is outside the angle range R1. Is extended to When the connecting wire 26 is extended, the distance between the connecting wire 26 and the oil separating plate 29 is reduced, and the connecting wire 26 may come in contact with the oil separating plate 29, which may cause disconnection. Further, since the connection line 26 passes near the discharge pipe 22, the refrigeration oil 25 pumped up in the upper space of the container 20 is trapped in the connection line 26, enters the discharge pipe 22, and is discharged to the outside of the container 20 It becomes easy to be done. As a method of preventing the slack, it is possible to bind the connecting wires 26 with each other with a band, but the parts cost and the operation cost are incurred. In addition, the refrigeration oil 25 is trapped in the band, and the refrigeration oil 25 is easily discharged out of the container 20.

The first terminal 24 a and the second terminal 24 b each have three pins 71. It is desirable that the three pins 71 of the first terminal 24a and the second terminal 24b be disposed symmetrically with respect to the third straight line L3.

At least one connection line 26 included in the plurality of connection lines 26 is connected to one terminal 24 included in the plurality of terminals 24 via the cluster 72. In the present embodiment, the first connection line 26 a and the second connection line 26 b are connected to each of the first terminal 24 a and the second terminal 24 b via the cluster 72.

A cluster 72 configured by covering a metal connection terminal with a resin cover is used for connection between the connection wire 26 and the terminal 24 inside the container upper portion 20b. Since connection to the three pins 71 can be performed at one time, workability is improved. In order to prevent erroneous connection between the terminals 24, the cluster 72 may be used for some of the terminals 24 and only metal connection terminals may be used for the remaining terminals 24.

In the present embodiment, the three pins 71 of the two terminals 24 are arranged symmetrically with respect to a straight line passing through the center of the discharge pipe 22 and the middle point of the terminal 24. The connection lines 26 connected to the three pins 71 of the terminal 24 are taken out in the direction approaching this straight line. Therefore, the connection line 26 can be taken out collectively in the vicinity of the point P4 of the trunk portion 20a and the point P5 of the container upper portion 20b. Therefore, the lengths of the connection lines 26 can be set to be uniform and minimum. Some connection wires 26 do not sag in the container 20, and the wire connection workability is improved. Parts sharing of the connection line 26 can also be achieved, reducing the cost of parts and increasing the part management efficiency.

FIG. 12 shows the top of a portion of the compressor 12 as viewed in the axial direction D0, as in FIG. In FIG. 12, the plurality of power supply lines 27 are connected to the plurality of terminals 24 outside the container 20. The plurality of power supply lines 27 electrically connect the plurality of terminals 24 to the external power supply.

The plurality of power supply lines 27 include a first power supply line 27a connected to the first terminal 24a and a second power supply line 27b connected to the second terminal 24b. In the case where the plurality of terminals 24 includes another terminal 24 different from the first terminal 24a and the second terminal 24b, another power supply line 27 connected to the other terminal 24 is connected to the plurality of power supply lines 27. It may be included.

The portion of each power supply line 27 following the end connected to each terminal 24 is taken out of the existing range R2 of each terminal 24 in plan view. The power supply line 27 extends from the end of a certain power supply line 27 connected to a certain terminal 24, and the power supply line 27 extends from the end of the existence range R2 of the terminal 24 in plan view. It is the position being taken out.

The direction in which each power supply line 27 is taken out from each terminal 24 may be any direction, but in the present embodiment, the first power supply line 27a is taken out in the direction away from the third straight line L3 in plan view. The line 27b is taken out in a direction approaching the third straight line L3. That is, the first power supply line 27a is taken out in the direction away from the third straight line L3 in plan view. The second power supply line 27b is extracted in a direction away from the third straight line L3 in plan view. The first power supply line 27a may be extracted in a direction approaching the third straight line L3 and the second power supply line 27b may be extracted in a direction away from the third straight line L3 in plan view. Alternatively, in a plan view, the first power supply line 27a and the second power supply line 27b may be taken out in a direction away from the third straight line L3.

As described above, in the present embodiment, the power supply line 27 for supplying power is connected to the terminal 24 outside the container upper portion 20b. When mounting the compressor 12 on the refrigeration cycle apparatus 10 or replacing the compressor 12, in order to prevent erroneous wiring, a plurality of power supply lines 27 are integrated as in the comparative example shown in FIG. It is desirable that the power supply lines 27 be separated and clearly distinguished even after the cover is attached. As shown in FIG. 12, erroneous connection can be prevented by extracting one of the power supply lines 27 in a direction away from the straight line passing through the center of the discharge pipe 22 and the middle points of the plurality of terminals 24.

*** Description of the effects of the embodiment ***
The angle range R1 is a second straight line passing through the center P0 of the container 20 and the center P1 of the first terminal 24a and the center P0 of the container 20 and the center P2 of the second terminal 24b in plan view. It is the range of 180 degrees or less which L2 makes. In the present embodiment, the connection wires 26 electrically connecting the terminals 24 and the motor 40 are taken out of the existing range R2 of the terminals 24 at a position within the angle range R1 in plan view. Therefore, the length of each connection line 26 can be shortened.

According to the present embodiment, by providing the plurality of terminals 24 without increasing the outer diameter of the container 20, highly efficient and high-speed operation is possible, and the small-sized compressor 12 can be obtained. It is.

According to the present embodiment, even if there are more places where the terminal 24 provided in the container upper portion 20b and the discharge pipe 22 are close, when the inside of the container 20 becomes high in pressure, the space between the terminal 24 and the discharge pipe The stress is less likely to be concentrated in the region of (b), so deformation of the container 20 is less likely to occur. Leakage of refrigerant gas and breakage of the terminal 24 due to deformation of the container 20 can be prevented.

According to the present embodiment, although a plurality of sets of connecting wires 26 connecting the motor 40 and the terminals 24 are required, the risk of disconnection due to contact with a structure rotating at high speed with the rotor 42 in the container 20 is reduced. Can. The efficiency of the work of connecting the connecting wire 26 to the terminal 24 is increased.

In the present embodiment, the first flat portion 81 where the terminal 24 is disposed is inclined with respect to a virtual vertical plane orthogonal to the axial direction D0. Thereby, the distance between the discharge pipe 22 and the terminal 24 and the distance between the terminal 24 and the peripheral wall of the container 20 are extended. Therefore, even if the plurality of terminals 24 are provided while maintaining the outer diameter of the container 20, concentration of stress between the discharge pipe 22 and the terminals 24 is suppressed, and the container 20 is less likely to be deformed. That is, the strength of the container 20 can be secured.

Moreover, angle range R1 which connected the center of the container 20 and the center of the some terminal 24 in planar view is 180 degrees or less. The extraction direction of the connection line 26 is within the angle range R1. As a result, it is possible to arrange the plurality of sets of connection lines 26 avoiding the structure rotating at high speed with the rotor 42, and to arrange the plurality of terminals 24 collectively. Therefore, the disconnection of the connection wire 26 does not occur. Assembly workability improves. The arrangement of the terminals 24 can be easily performed.

FIG. 14 shows a comparison result of the amount of deformation relative to the internal pressure of the container upper portion 20b of the present embodiment and the container upper portion of the comparative example.

In order to obtain the results shown in FIG. 14, with respect to the upper portion 20 b of the container, the load pressure was set to 5 MPa, the numerical analysis conditions were set, and the amount of deformation under load was calculated. The black bar graph is the variation of the present embodiment, and the white bar graph is the comparison of the comparative example. The amount of deformation of the upper portion of the container of the comparative example was 100%.

The amount of deformation between the discharge pipe 22 and the terminal 24 of the container upper portion 20b is reduced to about 50% of that of the comparative example. The amount of deformation of the central portion of the terminal 24 is reduced to about 80% of that of the comparative example. It is considered that this is because the distance between the discharge pipe 22 and the terminal 24 is sufficiently maintained. In addition, it is considered that one of the factors is that the first flat portion 81 in which the terminal 24 is disposed and the curved surface portion 83 in which the discharge pipe 22 is disposed are connected by the smooth concave portion 84. As described above, it was found that, by adopting the structure of the container upper portion 20b of the present embodiment, the stress concentration is alleviated and the deformation of the container upper portion 20b can be significantly reduced.

According to the present embodiment, stress applied to the terminal 24 can be reduced, and refrigerant leakage due to a micro crack or the like of the glass portion of the terminal 24 can be suppressed. Even if a flammable refrigerant having a low global warming potential, including R290, is sealed in the container 20, the flammable refrigerant does not leak from the container 20, and safety is maintained.

According to the present embodiment, even if a refrigerant having a saturation pressure higher than that of the R22 refrigerant is compressed, the container 20 is sufficiently strong, so safety can be maintained.

*** Other configuration ***
In the present embodiment, not only the vertical-type compressor 12 but also the horizontal-type compressor, the wedge-shaped hermetic container is press-fit into the release portion of the cylindrical hermetic container, and a discharge pipe is provided at the center It can be applied to cases.

Second Embodiment
The difference between this embodiment and the first embodiment will be mainly described with reference to FIG.

FIG. 15 shows a top view of a portion of the compressor 12 as viewed along the axial direction D0.

In the first embodiment, the plurality of terminals 24 are collectively disposed in one first flat portion 81, but in the present embodiment, the plurality of terminals 24 are disposed in two or more first flat portions 81. It is divided and arranged.

The surface of each first flat portion 81 has an oval shape such as an oval or a rounded rectangle. The edge of each first flat section 81 is connected to the curved section 83 by a smoothly curved recess 84. That is, the portion between the first flat surface portion 81 and the curved surface portion 83 is recessed. The recess 84 is formed thick and has a function as a rib for improving the strength.

In the present embodiment, each first flat surface portion 81 is inclined at an inclination angle away from the virtual vertical plane as approaching the central axis of the container 20 along the two directions with respect to the virtual vertical plane.

Specifically, along the first direction D1, the entire first flat surface portion 81 is inclined at a first inclination angle θ1 with respect to the virtual vertical plane. Thereby, a part including the end of the 1st direction D1 of each 1st plane part 81 is separated from an imaginary perpendicular plane as the central axis of container 20 is approached along with the 1st direction D1. The remaining portion including the other end of the first flat portion 81 in the first direction D1 is farther from the virtual vertical plane as it goes away from the central axis of the container 20 along the first direction D1. The first inclination angle θ1 is desirably 5 ° or more and 30 ° or less, and is 5 ° in the present embodiment.

In addition, along the second direction D2, the entire first flat surface portion 81 is inclined at a second inclination angle θ2 with respect to the virtual vertical plane. As a result, a portion of each first flat surface portion 81 including one end in the second direction D2 is farther from the virtual vertical plane as it approaches the central axis of the container 20 along the second direction D2. The remaining portion of each first flat portion 81 including the other end in the second direction D2 is farther from the virtual vertical plane as it goes away from the central axis of the container 20 along the second direction D2. The second inclination angle θ2 is desirably 5 ° or more and 30 ° or less, and is 10 ° in the present embodiment.

Note that at least one of the first inclination angle θ1 and the second inclination angle θ2 of the first flat surface portion 81 may be different for each first flat surface portion 81. That is, the inclination angle of the first flat portion 81 may be different for each of the terminals 24.

In the present embodiment, the rods 28 are disposed on the lower side of the respective first flat portions 81. The rod 28 is provided to extend along the axial direction D0.

Third Embodiment
In the first embodiment, the connecting wire 26 is integrated with the winding 44 of the motor 40. However, as shown in FIG. 16, the connecting wire 26 is connected to the winding 44 of the motor 40 via the connection terminal 47. It may be

Fourth Embodiment
In the first embodiment, the body 20a and the container lower portion 20c of the container 20 are connected by welding, but as shown in FIG. 17, the body 20a and the container lower portion 20c of the container 20 are integrally formed. It is also good.

Reference Signs List 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 portion, 20b container upper portion, 20c Lower part of container, 21 suction pipe, 22 discharge pipe, 23 suction muffler, 24 terminal, 24a first terminal, 24b second terminal, 25 refrigerator oil, 26 connecting wire, 26a first connecting wire, 26b second connecting wire, 27 Power supply wire, 27a 1st power supply wire, 27b 2nd power supply wire, 28 rod, 29 oil separation plate, 30 compression mechanism, 31 cylinder, 32 rolling piston, 33 main bearing, 34 sub bearing, 35 discharge muffler, 36 fasteners, 40 motor, 41 stator, 42 rotor, 43 stator core, 44 windings, 45 rotor core, 46 Permanent magnet, 47 connection terminal, 50 crankshaft, 51 eccentric shaft, 52 main shaft, 53 sub shaft, 54 through hole, 61 cylinder chamber, 62 vane groove, 63 back pressure chamber, 64 vane, 71 pin, 72 cluster , 81 first flat portion, 81 a end, 81 b end, 82 second flat portion, 83 curved portion, 84 concave portion, 85 ring material, D0 axial direction, D1 first direction, D2 second direction, H1 distance, L1 1st straight line, L2 second straight line, L3 third straight line, P0 center, P1 center, P2 center, P3 middle point, P4 point, P5 point, P6 point, P7 point, R1 angle range, R2 existence range, θ1 first range Tilt angle, θ 2 Second tilt angle.

Claims

A compression mechanism for compressing a refrigerant;
An electric motor for driving the compression mechanism;
A container for containing the compression mechanism and the motor;
A first straight line including a first terminal and a second terminal and attached to one axial end of the container, the first straight line having a center passing through a center of the container and a center of the first terminal in plan view; A plurality of terminals located within an angle range of 180 ° or less formed by a second straight line passing through the center of the second terminal and the center of the second terminal;
The compressor electrically connects the plurality of terminals and the electric motor in the container, and includes a plurality of connection lines extracted from the plurality of terminals into the angular range in a plan view.
The compressor according to claim 1, wherein the plurality of connection lines are disposed within the angular range in a plan view.
The plurality of connection lines include a first connection line electrically connecting the first terminal and the motor, and a second connection line electrically connecting the second terminal and the motor.
The first connection line and the second connection line approach a third straight line passing through the center of the container, and the midpoint between the center of the first terminal and the center of the second terminal in plan view The compressor according to claim 1 or 2, which has been taken out.
It further comprises a plurality of power supply lines connected to the plurality of terminals outside the container,
The plurality of power supply lines include a first power supply line connected to the first terminal and a second power supply line connected to the second terminal,
At least one of the first power supply line and the second power supply line is a third straight line passing through a center of the container, and a midpoint between the center of the first terminal and the center of the second terminal in plan view The compressor according to claim 1, wherein the compressor is taken out in the direction away from.
The first terminal and the second terminal each have three pins,
The compressor according to claim 3 or 4, wherein three pins of the first terminal and the second terminal are arranged symmetrically with respect to the third straight line.
The compressor according to any one of claims 1 to 5, wherein at least one connection line included in the plurality of connection lines is connected to one terminal included in the plurality of terminals via a cluster.
In order to discharge the refrigerant to the outside of the container, the container further includes a discharge pipe provided at a position overlapping with the central axis of the container at one axial end of the container,
The container extends in at least one direction with respect to a virtual vertical plane perpendicular to the axial direction of the container, which is located between the curved surface portion in which the discharge pipe is disposed, and the plurality of terminals and the motor. From one end in the axial direction of the container, with one or more flat portions inclined at an inclination angle away from the virtual vertical plane as the central axis of the container is approached, and one or more flat portions on which the plurality of terminals are disposed The compressor according to any one of 6.
The compressor according to claim 7, wherein the inclination angle is 5 ° or more and 30 ° or less with respect to the virtual vertical plane.
At least a portion of the one or more flat portions including one end in a first direction orthogonal to the axial direction with respect to the virtual vertical plane, as the virtual axis approaches the central axis of the container along the first direction Tilt at a first tilt angle away from the vertical plane,
At least a portion of the one or more flat portions, including one end in the second direction orthogonal to the first direction and the axial direction, is a central axis of the container along the second direction with respect to the virtual vertical plane. The compressor according to claim 7 or 8, wherein the compressor is inclined at a second inclination angle away from the virtual vertical plane as it approaches.
The compressor according to claim 9, wherein the second tilt angle is different from the first tilt angle.
The compressor according to any one of claims 7 to 10, wherein the plurality of terminals are arranged in one flat portion.
The compressor according to any one of claims 7 to 10, wherein the plurality of terminals are divided into two or more flat portions.
The container may have another flat surface located at the maximum distance from the virtual vertical plane closer to the one or more flat surface portions and an accessory different from the plurality of terminals disposed, the one axial direction end of the container The compressor according to any one of claims 7 to 12, wherein
It further comprises a rod to which a cover for covering the plurality of terminals is attached,
The compressor according to any one of claims 7 to 12, wherein the container has another flat portion in which the rod is disposed at one axial end of the container.
The discharge pipe according to any one of claims 7 to 14, wherein the discharge pipe is joined to the curved surface portion via a ring member and extends to a position closer to the compression mechanism than the ring member in the container. Compressor.
One axial end of the container is circular in plan view,
The compressor according to any one of claims 7 to 15, wherein an outer diameter of the discharge pipe is equal to or greater than 0.1 times an outer diameter of one axial end of the container.
The part following each end of each connecting wire connected to each terminal is taken out of the existing range of each terminal at a position within the angle range in a plan view. The compressor as described in.
A refrigeration cycle apparatus comprising the compressor according to any one of claims 1 to 17.