CN111033052B

CN111033052B - Compressor and refrigeration cycle device

Info

Publication number: CN111033052B
Application number: CN201780093649.4A
Authority: CN
Inventors: 新井聪经; 五前尚久; 佐佐木亮; 饭田敏充; 久保健一
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2017-08-09
Filing date: 2017-08-09
Publication date: 2021-12-10
Anticipated expiration: 2037-08-09
Also published as: CZ202011A3; CN111033052A; WO2019030841A1; JP6746000B2; KR20200020860A; JPWO2019030841A1; KR102320908B1; CZ309325B6

Abstract

In the compressor, the plurality of terminals (24) are positioned so that their respective centers are located on a first straight line (P0) passing through the center (P0) of the container (20) and the center (P1) of the first terminal (24a) when viewed from above. L1), mounted on the container so as to be within the angular range (R1) of 180° or less formed by the second straight line (L2) passing through the center (P0) of the container (20) and the center (P2) of the second terminal (24b) The axial end of (20). A plurality of connecting wires (26) electrically connect the plurality of terminals (24) to the motor in the container (20). When viewed from above, the plurality of connecting wires (26) are drawn out from the plurality of terminals (24) within the angular range (R1).

Description

Compressor and refrigeration cycle device

Technical Field

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

Background

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

In general, a hermetic container of a rotary compressor is provided with a hermetic terminal. However, by providing two airtight terminals, it is possible to reduce the current flowing through the airtight terminals and the lead wires, or to switch the connection method of the windings of the motor.

Patent document 1 describes a technique in which a 1 st lead wire is wound in a counterclockwise direction and connected to a 1 st terminal, and a 2 nd lead wire is wound in a clockwise direction and connected to a 2 nd terminal.

Patent document 1: japanese patent laid-open publication No. 2010-53786

In the technique described in patent document 1, the rising portions of the 1 st and 2 nd lead wires from the motor are provided on the opposite side of the 1 st and 2 nd terminals with respect to the discharge pipe. Therefore, the length of the 1 st and 2 nd lead wires needs to be increased according to the size of the discharge pipe and other members provided in the central portion of the closed casing.

Disclosure of Invention

The purpose of the present invention is to shorten the length of a plurality of connection wires for electrically connecting a plurality of terminals attached to a container of a compressor and a motor housed in the container of the compressor.

A compressor according to an aspect of the present invention includes: a compression mechanism that compresses a refrigerant; a motor for driving the compression mechanism; a container for accommodating the compression mechanism and the motor; a plurality of terminals including a 1 st terminal and a 2 nd terminal, which are mounted on one axial end of the container, wherein, in a plan view, the centers of the plurality of terminals are located in an angular range of 180 DEG or less between a 1 st straight line passing through the center of the container and the center of the 1 st terminal and a 2 nd straight line passing through the center of the container and the center of the 2 nd terminal; and a plurality of connection lines electrically connecting the plurality of terminals and the motor in the container, the plurality of connection lines being drawn from the plurality of terminals into the angular range in a plan view.

Further, the following configuration is possible: the plurality of connecting lines are arranged within the angle range in a plan view.

Further, the following configuration is possible: the plurality of connection lines include a 1 st connection line electrically connecting the 1 st terminal and the motor, and a 2 nd connection line electrically connecting the 2 nd terminal and the motor, and the 1 st connection line and the 2 nd connection line are drawn in a direction approaching a 3 rd straight line in a plan view, wherein the 3 rd straight line passes through a center of the container and a midpoint between a center of the 1 st terminal and a center of the 2 nd terminal.

Further, the following configuration is possible: the power supply system further includes a plurality of power supply lines connected to the plurality of terminals outside the container, wherein the plurality of power supply lines include a 1 st power supply line connected to the 1 st terminal and a 2 nd power supply line connected to the 2 nd terminal, and at least one of the 1 st power supply line and the 2 nd power supply line is drawn in a direction away from a 3 rd straight line in a plan view, wherein the 3 rd straight line passes through a center of the container and a midpoint between a center of the 1 st terminal and a center of the 2 nd terminal.

Further, the following configuration is possible: the 1 st terminal and the 2 nd terminal have 3 pins, respectively, and the 3 pins of the 1 st terminal and the 3 pins of the 2 nd terminal are arranged in line symmetry with respect to the 3 rd terminal.

Further, the following configuration is possible: 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 bundling line.

Further, the following configuration is possible: the compressor further includes a discharge pipe provided at one axial end of the container at a position overlapping a central axis of the container, for discharging the refrigerant to an outside of the container, and the container includes at one axial end: a curved surface portion on which the discharge pipe is disposed; and one or more flat surface portions that are inclined in at least one direction at an inclination angle that is away from a virtual vertical surface that is positioned between the plurality of terminals and the motor and is perpendicular to an axial direction of the container, the inclination angle being away from the virtual vertical surface as the inclination angle approaches a central axis of the container, and the plurality of terminals being arranged on the flat surface portions.

Further, the following configuration is possible: the inclination angle is 5 ° or more and 30 ° or less with respect to the virtual vertical plane.

Further, the following configuration is possible: at least a portion of the one or more planar portions including one end in a 1 st direction orthogonal to the axial direction is inclined with respect to the virtual vertical plane along the 1 st direction at a 1 st inclination angle that is away from the virtual vertical plane as approaching the central axis of the container, and at least a portion of the one or more planar portions including one end in a 2 nd direction orthogonal to the axial direction and the 1 st direction is inclined with respect to the virtual vertical plane along the 2 nd direction at a 2 nd inclination angle that is away from the virtual vertical plane as approaching the central axis of the container.

Further, the following configuration is possible: the 2 nd inclination angle is different from the 1 st inclination angle.

Further, the following configuration is possible: the plurality of terminals are collectively arranged on one planar portion.

Further, the following configuration is possible: the plurality of terminals are separately arranged on two or more plane portions.

Further, the following configuration is possible: the container has another flat surface portion at one end in the axial direction of the container, the maximum distance between the another flat surface portion and the virtual vertical plane is smaller than the one or more flat surface portions, and accessories different from the plurality of terminals are arranged.

Further, the following configuration is possible: the container further includes a lever to which a cover for covering the plurality of terminals is attached, and the container has another flat surface portion on which the lever is disposed at one end in an axial direction of the container.

Further, the following configuration is possible: the discharge pipe is joined to the curved surface portion via an annular member and extends to a position closer to the compression mechanism than the annular member in the container.

Further, the following configuration is possible: the container has a circular shape in plan view at one axial end thereof, and the discharge pipe has an outer diameter that is 0.1 times or more the outer diameter of the container at the one axial end thereof.

Further, the following configuration is possible: in a plan view, a portion of each connection line continuous to one end connected to each terminal is drawn out of the range in which each terminal exists at a position within the angular range.

The refrigeration cycle apparatus of the present invention includes the compressor.

In the present invention, each connecting wire electrically connecting each terminal and the motor is drawn out to an angle range of 180 ° or less between a 1 st straight line passing through the center of the case and the center of the 1 st terminal and a 2 nd straight line passing through the center of the case and the center of the 2 nd terminal in a plan view. Therefore, the length of each connection line can be shortened.

Drawings

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

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

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

Fig. 4 is a transverse cross-sectional view of a part of the compressor according to embodiment 1.

Fig. 5 is a plan view of a part of the compressor according to embodiment 1.

Fig. 6 is a longitudinal sectional view of a part of the compressor according to embodiment 1.

Fig. 7 is a partial longitudinal sectional view of a part of the compressor according to embodiment 1.

Fig. 8 is a side view of a part of the compressor according to embodiment 1.

Fig. 9 is a bottom view of a part of the compressor according to embodiment 1.

Fig. 10 is a diagram illustrating a method of connecting lines when the compressor according to embodiment 1 is assembled.

Fig. 11 is a diagram illustrating a method of connecting lines in assembling the compressor according to the comparative example.

Fig. 12 is a plan view of a part of the compressor according to embodiment 1.

Fig. 13 is a plan view of a part of a compressor according to a comparative example.

Fig. 14 is a bar graph showing the results of comparing the amount of deformation of the upper part of the container with respect to the internal pressure in the compressors according to embodiment 1 and the comparative example.

Fig. 15 is a plan view of a part of the compressor according to embodiment 2.

Fig. 16 is a longitudinal sectional view of the compressor according to embodiment 3.

Fig. 17 is a longitudinal sectional view of the compressor according to embodiment 4.

Detailed Description

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

Embodiment mode 1

The present embodiment will be described with reference to fig. 1 to 14.

Description of the structure of Tuliuzhang

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

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

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

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

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

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

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

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

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

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

The compressor 12 is a hermetic compressor in the present embodiment. Specifically, the compressor 12 is 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, a motor 40, and a crankshaft 50.

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

The motor 40 is accommodated in the container 20. Specifically, the motor 40 is provided at an inner upper portion of the container 20. The electric motor 40 is a concentrated winding type motor in the present embodiment, but may be a distributed winding type motor.

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

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

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

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

The crankshaft 50 includes an eccentric shaft 51, a main shaft 52, and an auxiliary shaft 53. The main shaft portion 52, the eccentric shaft portion 51, and the auxiliary shaft portion 53 are provided in this order in the axial direction D0. That is, the main shaft portion 52 is provided on one axial end side of the eccentric shaft portion 51, and the sub shaft portion 53 is provided on the other axial end side of the eccentric shaft portion 51. The eccentric shaft 51, the main shaft 52, and the sub shaft 53 are each cylindrical. The main shaft portion 52 and the auxiliary shaft portion 53 are disposed so that their central axes coincide with each other, i.e., are disposed coaxially. The eccentric shaft portion 51 is provided with a central axis offset from the central axes of the main shaft portion 52 and the auxiliary shaft portion 53. When the main shaft portion 52 and the auxiliary shaft portion 53 rotate around the central axis, the eccentric shaft portion 51 eccentrically rotates.

The container 20 will be described in detail below.

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

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

The details of the 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 short for Direct Current.

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

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

The stator 41 has a stator core 43 and a winding 44. A plurality of electromagnetic steel sheets mainly composed of iron are punched out into a predetermined shape and stacked in the axial direction D0, and are fixed by caulking to produce the stator core 43. The thickness of each electromagnetic steel sheet is, for example, 0.1mm to 1.5 mm. The stator core 43 has an outer diameter larger than 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 44 is wound around the stator core 43. Specifically, the winding 44 is wound around the stator core 43 via an insulating member so as to be concentrated. The winding 44 is composed of a core wire and at least one coating film covering 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 insulating member is made of 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 other methods such as welding may be used. The method of fixing the stator core 43 to the inside of the body portion 20a of the container 20 is not limited to the shrink fit, and other methods such as press fitting and welding may be used. The material of the core wire of the winding 44 may be aluminum. The insulating member may be made of PBT, FEP, PFA, PTFE, LCP, PPS, or phenol resin. "PBT" is an abbreviation for Polybutylene Terephthalate. "FEP" is an abbreviation for Fluorinated Ethylene Propylene. "PFA" is an abbreviation for Perfluoroakoxy Alkane (Perfluoroalkoxy). "PTFE" is an abbreviation for Polytetrafluoroethylene. "LCP" is an abbreviation for Liquid Crystal Polymer (LCP). "PPS" is an abbreviation for Polyphenylene Sulfide (Polyphenylene Sulfide) from Polyphenylene.

The rotor 42 has a rotor core 45 and a permanent magnet 46. Similarly to the stator core 43, a plurality of electromagnetic steel sheets mainly composed of iron are punched out into a predetermined shape and laminated in the axial direction D0, and are fixed by caulking to produce the rotor core 45. The thickness of each electromagnetic steel sheet is, for example, 0.1mm to 1.5 mm. 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.

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

A shaft hole into which the main shaft portion 52 of the crankshaft 50 is press-fitted or press-fitted is formed in the center of the rotor core 45 in a 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 D0 are formed around the shaft hole of the rotor core 45. Each through hole serves as one of the paths 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 allowing the refrigerating machine oil 25 guided to the upper portion of the container 20 to fall to the lower portion of the container 20.

When the motor 40 is an induction motor, conductors made of aluminum, copper, or the like are filled or inserted into a plurality of slots formed in the rotor core 45, although not shown. Further, a cage winding is formed in which both ends of the conductor are short-circuited by end rings.

The container upper portion 20b is provided with a terminal 24 connected to an external power source such as an inverter device, and a lever 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 connection wire 26 extending from the winding 44 of the motor 40 is connected to the terminal 24. Thereby, the terminal 24 is electrically connected to the motor 40.

The container upper part 20b is also provided with a discharge pipe 22 having both ends open in the axial direction. 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 this order, and is discharged from the space in the container 20 to the external refrigerant circuit 11 through the discharge pipe 22.

The oil separation plate 29 separates the refrigerator oil 25 in the container 20 sucked together with the refrigerant. The oil separation plate 29 is fixed to the crankshaft 50 by press fitting, and rotates with the rotation of the crankshaft 50. Alternatively, the oil separation plate 29 is fixed to the rotor 42 by a fixing member such as a rivet and rotates at a high speed in accordance with the rotation of the rotor 42. The specific gravity of the refrigerator oil 25 is greater than that of the refrigerant. Therefore, the oil separation plate 29 can separate the refrigerating machine oil 25 by causing the oil to fly out in the outer circumferential direction by centrifugal force.

The discharge pipe 22 may be provided on the outer peripheral portion of the container upper portion 20b, but in the present embodiment, the discharge pipe 22 is provided in the central portion of the container upper portion 20b directly above the crankshaft 50. When the discharge pipe 22 is provided 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, and thus the amount of the refrigerating machine oil 25 in the container 20 decreases, and there is a possibility that the lubricity of the compression mechanism 30 decreases. In order to prevent such a decrease in lubricity, it is preferable that the discharge pipe 22 be provided at the center of the container upper portion 20 b.

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

Fig. 4 shows a cross-section of a portion of compressor 12 viewed along axial direction D0. In fig. 4, hatching for showing the cross section is omitted.

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

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

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

The cylinder block 31 is provided with vane grooves 62 that extend in the radial direction and are connected to the cylinder chamber 61. A back pressure chamber 63, which is a circular space in a plan view and is continuous with the vane groove 62, is formed outside the vane groove 62. In the vane groove 62, a vane 64 is provided, and the vane 64 is used to divide 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 blade 64 is a plate with a curled front end. The vane 64 slides in the vane groove 62 and reciprocates. The vane 64 is constantly pressed against the rotary plunger 32 by a vane spring provided in the back pressure chamber 63. Since the pressure in the tank 20 is high, when the compressor 12 starts operating, a force generated by a difference between the pressure in the tank 20 and the pressure in the cylinder chamber 61 acts on the vane back surface, which is the surface of the vane 64 on the back pressure chamber 63 side. Therefore, the main purpose of using the leaf spring is to press the leaf 64 against the rotary plunger 32 when the compressor 12 is started up, in which there is no difference between the pressure in the container 20 and the pressure in the cylinder chamber 61.

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

The sub-bearing 34 is a bearing having a T-shape in side view. The sub bearing 34 is slidably fitted into a sub shaft 53 which is a portion of the crankshaft 50 below the eccentric shaft 51. An oil film is formed between the sub-bearing 34 and the sub-shaft portion 53 by supplying the refrigerating machine oil 25 sucked 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 block 31. That is, the sub-bearing 34 closes the lower sides of the two working chambers in the cylinder 31.

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

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

The discharge muffler 35 is mounted on the outer side of the main bearing 33. The high-temperature and high-pressure gas refrigerant discharged after opening the discharge valve temporarily 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 mounted on the outside of the bearing provided with the discharge port and the discharge valve.

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

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

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

Description of the actions of Tuzhang

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

Electric power is supplied from the terminal 24 to the stator 41 of the motor 40 via the connection line 26. Thereby, a current flows through the winding 44 of the stator 41, and a magnetic flux is generated by the winding 44. The rotor 42 of the motor 40 rotates due to the action of the magnetic flux generated by the winding 44 and the magnetic flux generated by the permanent magnet 46 of the rotor 42. Specifically, the rotor 42 rotates due to an attraction/repulsion action between a rotating magnetic field generated by a current flowing through the winding 44 of the stator 41 and a magnetic field of the permanent magnet 46 of the rotor 42. The crankshaft 50 fixed to the rotor 42 rotates by the rotation of the rotor 42. As the crankshaft 50 rotates, the rotary plunger 32 of the compression mechanism 30 eccentrically rotates in the cylinder chamber 61 of the cylinder block 31 of the compression mechanism 30. A space between the cylinder block 31 and the rotary plunger 32, i.e., the cylinder chamber 61 is divided into a suction chamber and a compression chamber by the vane 64. The volume of the suction chamber and the volume of the compression chamber change as the crankshaft 50 rotates. In the suction chamber, the volume is gradually increased, and a low-pressure gas refrigerant is sucked from the suction muffler 23 through the suction pipe 21. In the compression chamber, the passing volume is gradually reduced, thereby compressing the gas refrigerant therein. The compressed high-pressure high-temperature gas refrigerant is discharged from discharge muffler 35 into the space in container 20. The discharged gas refrigerant is also discharged from the discharge pipe 22 located at the upper portion 20b of the container to the outside of the container 20 through the motor 40. The refrigerant discharged to the outside of the container 20 passes through the refrigerant circuit 11 and returns to the suction muffler 23 again.

Detailed description of the structure of Tung

The structure of the compressor 12 according to the present embodiment will be described in detail with reference to fig. 3 and 5 to 13.

Fig. 5 shows an upper surface of a portion of compressor 12 as viewed in axial direction D0. Fig. 6 shows a cross section of a part of the compressor 12 viewed in the 1 st 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 viewed along a 2 nd direction D2 orthogonal to the axial direction D0 and the 1 st direction D1. Fig. 8 shows a side view of a portion of the compressor 12 as viewed in the 1 st direction D1. In fig. 8, the terminal 24 is omitted.

The container upper portion 20b connected to the body portion 20a has a circular shape in plan view. A discharge pipe 22 is provided at the center of the container upper part 20 b. The container upper portion 20b has a surface formed with a 1 st plane portion 81, a 2 nd plane portion 82, and a curved surface portion 83.

The 1 st plane part 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 into a through hole provided in the 1 st plane portion 81. The outermost shell of each terminal 24 abuts against the inner peripheral edge of the through hole thereof.

The 2 nd plane part 82 is provided with a rod 28 perpendicular to the 2 nd plane part 82.

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

The surface of the curved surface portion 83 is formed of a plurality of curved surfaces. The curved surface portion 83 has a shape similar to a hemisphere with a part missing.

The edge portions of the 1 st plane portion 81 and the 2 nd plane portion 82 are connected to the curved surface portion 83 by a smoothly curved concave portion 84. That is, the portions between the curved surface portions 83 and the 1 st and 2

nd plane portions

81 and 82 sink. The concave portion 84 is formed thick and functions as a rib for improving strength.

The 1 st plane portion 81 is inclined at a 1 st inclination angle θ 1 in a direction away from a virtual vertical plane that is orthogonal to the axial direction D0 with respect to the virtual vertical plane formed at the upper end or the upper side opening of the cylindrical body portion 20 a. The 1 st inclination angle θ 1 is preferably 5 ° to 30 °, and in the present embodiment is 5 °. One end 81a of the 1 st plane part 81 protrudes outward beyond the curved part 83. The distance from one end 81a of the 1 st plane part 81 to the virtual vertical plane is longer than the distance from the other end 81b of the 1 st plane part 81 to the virtual vertical plane. The 1 st plane portion 81 inclined at the 1 st inclination angle θ 1 is connected to the curved portion 83 through the concave portion 84, whereby the distance between the outermost shell of the terminal 24 and the outer peripheral wall of the discharge tube 22 along the shape of the container upper portion 20b and the distance between the outermost shell of the terminal 24 and the inner peripheral wall of the container upper portion 20b along the shape of the container upper portion 20b increase.

Thus, the 1 st plane part 81 is inclined with respect to the imaginary vertical plane. The 1 st plane part 81 is smoothly connected to the curved surface part 83 by the concave part 84. Therefore, even when the distance between the terminal 24 and the discharge tube 22 is maintained in a plan view, the distance between the outermost shell of the terminal 24 and the outer peripheral wall of the discharge tube 22 along the shape of the container upper portion 20b and the distance between the outermost shell of the terminal 24 and the inner peripheral wall of the container upper portion 20b along the shape of the container upper portion 20b are extended. By increasing the 1 st inclination angle θ 1 of the 1 st plane part 81, one end 81a of the 1 st plane part 81 is further away from the curved surface part 83, and the one end 81a of the 1 st plane part 81 protrudes than the curved surface part 83, so that the distance to the imaginary vertical plane becomes larger. 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 a plan view, the diameter of the container upper portion 20b is set to 100mm, the distance between the outermost shell of the terminal 24 and the outer peripheral wall of the discharge tube 22 is set to less than 3mm, and the distance between the outermost shell of the terminal 24 and the inner peripheral wall of the container upper portion 20b is set to less than 5 mm. In this case, if the 1 st plane part 81 is not inclined, the distance between the outermost shell of the terminal 24 and the outer peripheral wall of the discharge tube 22 and the distance between the outermost shell of the terminal 24 and the inner peripheral wall of the container upper part 20b cannot be sufficiently ensured. That is, it is impossible to design the insulation distance in accordance with the specification. When the 1 st plane part 81 is inclined at the 1 st inclination angle θ 1, the distance between the outermost shell of the terminal 24 and the outer peripheral wall of the discharge tube 22 can be secured to be 3mm or more, and the distance between the outermost shell of the terminal 24 and the inner peripheral wall of the container upper part 20b can be secured to be 5mm or more. That is, the insulation distance can be designed in accordance with the specification. If the 1 st inclination angle θ 1 of the 1 st flat surface portion 81 is within a range of 5 ° or more and 30 ° or less 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 tube 22 and the distance between the outermost shell of the terminal 24 and the inner peripheral wall of the container upper portion 20b can be ensured.

As described above, the discharge pipe 22 is provided at one axial end of the container 20 at a position overlapping the central axis of the container 20. The container 20 has a curved surface portion 83 on which the discharge pipe 22 is disposed and a 1 st plane portion 81 on which the plurality of terminals 24 are disposed at one end in the axial direction of the container 20. The 1 st plane portion 81 is inclined in at least one direction at an inclination angle away from an imaginary vertical plane perpendicular to the axial direction D0 with respect to the imaginary vertical plane between the plurality of terminals 24 and the motor 40 as approaching the central axis of the container 20.

In the present embodiment, the 1 st plane part 81 is inclined with respect to the virtual vertical plane in two directions at an inclination angle that is away from the virtual vertical plane as approaching the central axis of the container 20.

Specifically, at least a portion of the 1 st plane part 81 including one end in the 1 st direction D1 perpendicular to the axial direction D0 is inclined with respect to the imaginary vertical plane at a 1 st inclination angle θ 1 away from the imaginary vertical plane as approaching the central axis of the container 20 along the 1 st direction D1. In the present embodiment, the 1 st plane part 81 is entirely inclined at the 1 st inclination angle θ 1 with respect to the virtual vertical plane along the 1 st direction D1. Thus, a portion of the 1 st plane part 81 including one end in the 1 st direction D1 is separated from the virtual vertical plane as approaching the central axis of the container 20 along the 1 st direction D1. The remaining portion of the 1 st plane part 81 including the other end in the 1 st direction D1 is separated from the virtual vertical plane along the 1 st direction D1 as being separated from the central axis of the container 20. As described above, the 1 st inclination angle θ 1 is preferably 5 ° or more and 30 ° or less, and is 5 ° in the present embodiment.

At least a portion of the 1 st plane part 81 including one end of the 2 nd direction D2 orthogonal to the axial direction D0 and the 1 st direction D1 is inclined with respect to the imaginary vertical plane at a 2 nd inclination angle θ 2 away from the imaginary vertical plane as approaching the central axis of the container 20 along the 2 nd direction D2. In the present embodiment, the 1 st plane part 81 is entirely inclined at the 2 nd inclination angle θ 2 with respect to the virtual vertical plane along the 2 nd direction D2. Thus, a portion of the 1 st plane part 81 including one end in the 2 nd direction D2 is separated from the virtual vertical plane as approaching the central axis of the container 20 along the 2 nd direction D2. The remaining portion of the 1 st plane part 81 including the other end in the 2 nd direction D2 is separated from the imaginary vertical plane along the 2 nd direction D2 as being separated from the central axis of the container 20. When the length dimension of the 1 st plane part 81 in the 1 st direction D1 is different from the length dimension of the 1 st plane part 81 in the 2 nd direction D2, the 2 nd inclination angle θ 2 is preferably different from the 1 st inclination angle θ 1. That is, if the distance from one end to the other end of the 1 st plane part 81 in the 2 nd direction D2 is greater than the distance from one end to the other end of the 1 st plane part 81 in the 1 st direction D1, the 2 nd inclination angle θ 2 is preferably smaller than the 1 st inclination angle θ 1. If the distance from one end to the other end of the 1 st plane part 81 in the 2 nd direction D2 is smaller than the distance from one end to the other end of the 1 st plane part 81 in the 1 st direction D1, the 2 nd inclination angle θ 2 is preferably larger than the 1 st inclination angle θ 1. This is because the steeper the inclination, the more the height can be obtained within a short distance. If the height can be obtained, it is easy to secure a distance and an area. The 2 nd inclination angle θ 2 is preferably 5 ° or more and 30 ° or less, and in the present embodiment is 10 °.

At least one of the 1 st inclination angle θ 1 and the 2 nd inclination angle θ 2 of the 1 st planar portion 81 may be different for each region where the terminal 24 is present. That is, the inclination angle of the 1 st plane part 81 may be different for each terminal 24.

When the refrigerant compressed by the compression mechanism 30 is discharged into the space inside the container 20, the container 20 receives a force directed outward by the high-temperature and high-pressure gas refrigerant. In the body portion 20a, the body portion 20a is cylindrical, and thus stress concentration due to outward force can be reduced. In the container lower portion 20c, the container lower portion 20c is hemispherical or dome-shaped, whereby stress concentration caused by a force toward the outside can be reduced. In the container upper portion 20b, the 1 st plane portion 81 is inclined, and one end portion 81a of the 1 st plane portion 81 protrudes outward from the curved surface portion 83 and extends to a position higher than the center of the container upper portion 20 b. The 1 st plane portion 81 and the curved surface portion 83 are connected by a smoothly curved recess 84. Therefore, the distance between the plurality of terminals 24 provided in the 1 st plane part 81 and the discharge pipe 22 provided in the center of the container upper part 20b is increased as compared with the case where the surface of the container upper part 20b is flat and the case where the surface of the container upper part 20b is a hemisphere surface. The concave portion 84 is formed thick and functions as a rib. Therefore, even if the pressure in the container 20 rises, stress is less likely to concentrate, and deformation of the container upper portion 20b can be suppressed. That is, in the container upper portion 20b, the 1 st plane portion 81 is flat, the curved surface portion 83 is formed in a substantially hemispherical shape with a portion thereof being cut out, the concave portion 84 connecting the 1 st plane portion 81 and the curved surface portion 83 is formed thick, and is smoothly curved, whereby stress concentration caused by a force toward the outside can be reduced.

In the present embodiment, one axial end of the container 20 has a circular shape in a plan view. The outer diameter of the discharge pipe 22 is 0.1 times or more the outer diameter of the one axial end of the container 20. The 1 st plane part 81 is inclined such that a distance between the terminal 24 provided in the 1 st plane part 81 and the discharge tube 22 provided in the curved surface part 83 is extended. Therefore, even when the discharge pipe 22 having a large diameter of 0.1 times or more the outer diameter of the container upper portion 20b is used, the terminal 24 and the discharge pipe 22 can be disposed at a sufficient distance.

The lever 28 to which the cover for covering the terminal 24 is attached may be disposed on the 1 st plane part 81, but in the present embodiment, it is disposed on the 2 nd plane part 82. The rod 28 extends to a position higher than the curved surface portion 83 of the container upper portion 20 b. Therefore, the arrangement and mounting work of the terminal 24 and the lever 28 are facilitated. The work of attaching the cover to the rod 28 is also facilitated. Accessories such as a temperature sensor may be attached to the 2 nd plane part 82. In the present embodiment, the 2 nd planar portion 82 is lower than the top of the 1 st planar portion 81 by a distance H1. Therefore, when the temperature sensor is attached to the 2 nd flat surface portion 82, the temperature sensor can be disposed at a position close to the compression mechanism 30. The closer the temperature sensor is to the compression mechanism 30, the earlier the temperature change of the refrigerant discharged from the compression mechanism 30 can be detected even when the circulation flow rate of the refrigerant is small.

As described above, the container 20 has the 2 nd plane portion 82 on which the rod 28 is arranged at one end in the axial direction of the container 20. A cover for covering the plurality of terminals 24 is attached to the lever 28. The 2 nd plane part 82 may be inclined with respect to the virtual vertical plane, but in the present embodiment, it is parallel to the virtual vertical plane. The bar 28 is arranged perpendicularly with respect to the 2 nd planar portion 82. That is, the rod 28 is arranged to extend in the axial direction D0. Accessories other than the plurality of terminals 24 and the lever 28 may be disposed on the 2 nd plane part 82. When accessories such as a temperature sensor are disposed on the 2 nd plane part 82, the maximum distance of the 2 nd plane part 82 from the virtual vertical plane is preferably shorter than the 1 st plane part 81.

In the present embodiment, resistance welding is used as a method of attaching the discharge pipe 22 to the container upper portion 20 b. As shown in fig. 3, the discharge pipe 22 is joined to the curved surface portion 83 via an annular member 85. The material of the annular member 85 is iron. By attaching the annular member 85 to the discharge pipe 22 and pressing the inclined portion of the annular member 85 against the container upper portion 20b, the container upper portion 20b and the annular member 85 are in seamless contact over the entire circumference, and 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. By projecting the discharge pipe 22 toward the compression mechanism 30 from the annular member 85 in this manner, the refrigerating machine oil 25 accumulated in the inclined portion of the annular member 85 can be prevented 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 other methods such as gas welding using a brazing material or laser welding may be used. However, in gas welding, the amount of heat input is large, and the heat input range is wide. Therefore, when the discharge tube 22 is attached by gas welding and then the plurality of terminals 24 are attached by resistance welding, the surface of the portion of the container upper portion 20b to which the terminals 24 are attached may be deformed. If the strain occurs, the surface of the container upper portion 20b and the surface of the terminal 24 do not contact each other, and there is a possibility that a welding failure occurs at the time of resistance welding. Therefore, it is preferable to use resistance welding or laser welding for welding the discharge tube 22, thereby reducing the amount of heat input and reducing the heat input range.

Fig. 9 shows a lower surface of a part of the compressor 12 as viewed in the axial direction D0 from the inside of the container 20.

The plurality of terminals 24 include a 1 st terminal 24a and a 2 nd terminal 24 b. The plurality of terminals 24 may include terminals 24 different from the 1 st terminal 24a and the 2 nd terminal 24 b.

The plurality of terminals 24 are mounted at one axial end of the case 20 such that the center of each terminal 24 is located within an angular range R1 of 180 ° or less defined by a 1 st straight line L1 passing through the center P0 of the case 20 and the center P1 of the 1 st terminal 24a and a 2 nd straight line L2 passing through the center P0 of the case 20 and the center P2 of the 2 nd terminal 24b in a plan view. In the present embodiment, the plurality of terminals 24 are collectively arranged on the 1 st plane portion 81 of the container upper portion 20 b.

A plurality of connecting wires 26 electrically connect the plurality of terminals 24 with the motor 40 in the container 20.

The plurality of connection lines 26 include a 1 st connection line 26a electrically connecting the 1 st terminal 24a with the motor 40, and a 2 nd connection line 26b electrically connecting the 2 nd terminal 24b with the motor 40. When the plurality of terminals 24 include terminals 24 different from the 1 st and 2

nd terminals

24a and 24b, the plurality of connection wires 26 may include another connection wire 26 for electrically connecting the different terminal 24 to the motor 40.

In a plan view, the plurality of connection wires 26 are drawn out from the plurality of terminals 24 into the angular range R1. Specifically, in a plan view, a portion of each connection wire 26 continuous with one end connected to each terminal 24 is drawn out to the outside of the existing range R2 of each terminal 24 at a position within the angular range R1. The range R2 in which each terminal 24 is present is a region surrounded by an outline formed by the outermost shell of each terminal 24 in a plan view. The range R2 in which each terminal 24 is present may be an area of any shape, but in the present embodiment, it is a circular area. The position where a certain connection wire 26 extends from one end of the connection wire 26 connected to a certain terminal 24 and crosses the boundary of the existing range R2 of the terminal 24 in a plan view is a position where the connection wire 26 is drawn out. In the present embodiment, a plurality of the connection wires 26 are led out at this position so that all the connection wires 26 are accommodated within the angular range R1. Therefore, the length of the plurality of connection lines 26 can be shortened. In addition, the wiring space can be reduced. In order to reduce the wiring space as much as possible, the plurality of connection lines 26 are preferably arranged within the angular range R1 in a plan view. That is, it is preferable to lead out a plurality of connection wires 26 so that all the connection wires 26 are entirely accommodated within the angular range R1.

If the position where each connection wire 26 is drawn from each terminal 24 is within the angular range R1, the direction of each connection wire 26 drawn from each terminal 24 may be any direction, but in the present embodiment, each connection wire 26 is drawn toward the center of the angular range R1. That is, the 1 st connection line 26a and the 2 nd connection line 26b are drawn toward a direction approaching a 3 rd straight line L3 passing through the center P0 of the container 20 and a midpoint P3 of the center P1 of the 1 st terminal 24a and the center P2 of the 2 nd terminal 24 b. Therefore, the wiring space can be further reduced.

As described above, in the present embodiment, the angular range R1 defined by a straight line passing through 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 drawing direction of each connection wire 26 connected to each terminal 24 coincides with the angular range R1. In fig. 10, before the body portion 20a and the container upper portion 20b are connected, the connection wire 26 pulled out from the stator 41 is connected to the terminal 24 via the bundling wire 72 inside the container upper portion 20 b. Thereafter, the container upper portion 20b is fixed to the body portion 20a by welding so that the point P4 of the body portion 20a within the angle range R1 coincides with the point P5 of the container upper portion 20b, and the point P6 of the body portion 20a on the opposite side thereof coincides with the point P7 of the container upper portion 20b, and the lid is closed at the opening of the body portion 20 a. When the point P4 of the body portion 20a is aligned with the point P5 of the container upper portion 20b and the point P6 of the body portion 20a is aligned with the point P7 of the container upper portion 20b, the portion of each connecting wire 26 pulled out from the stator 41 is also on the point P4 side, that is, is also within the angular range R1. Therefore, the connection wires 26 and the terminals 24 can be connected to each other with the shortest length.

By the above-described wire connection method, the connection wire 26 does not need to be extended more than necessary, and the compressor 12 can be assembled without loosening the connection wire 26 in the container 20.

As in the comparative example shown in fig. 11, when the lead-out direction of the connection cord 26 connected to a certain terminal 24 is outside the angular range R1 and the portion of the connection cord 26 pulled out from the stator 41 after the body portion 20a and the container upper portion 20b are butted against each other is also outside the angular range R1, the connection cord 26 or another connection cord 26 is extended more than necessary, and rattling occurs in the container 20. In this comparative example, the 1 st connecting wire 26a connected to the 1 st terminal 24a is drawn out of the angular range R1, and the 2 nd connecting wire 26b connected to the 2 nd terminal 24b is extended by a necessary amount or more. When the connection line 26 extends, the distance between the connection line 26 and the oil separation plate 29 decreases, and the connection line 26 may contact the oil separation plate 29 and break. Further, since the connection line 26 passes near the discharge pipe 22, the refrigerating machine oil 25 sucked into the upper space of the container 20 is stored at a position where the connection line 26 exists, enters the discharge pipe 22, and is easily discharged to the outside of the container 20. As a method of preventing the loosening, the connecting wires 26 may be bundled with each other by a band member, but this costs the component cost and the working cost. Further, the refrigerating machine oil 25 is stored in the belt member, and the refrigerating machine oil 25 is easily discharged to the outside of the container 20.

The 1 st terminal 24a and the 2 nd terminal 24b each have 3 pins 71. Preferably, the 3 pins 71 of the 1 st terminal 24a and the 2 nd terminal 24b are arranged symmetrically with respect to the 3 rd straight line L3.

At least one connection wire 26 included in the plurality of connection wires 26 is connected to one terminal 24 included in the plurality of terminals 24 via the bundling wire 72. In the present embodiment, the 1 st connection line 26a and the 2 nd connection line 26b are connected to the 1 st terminal 24a and the 2 nd terminal 24b, respectively, via the bundling line 72.

For connection between the connection wire 26 and the terminal 24 inside the container upper portion 20b, a bundling wire 72 is used, which is formed by covering a metal connection terminal with a resin cover. Since the connection to the 3 pins 71 can be performed at a time, workability is improved. In order to prevent erroneous wiring between the terminals 24, the bundling wire 72 may be used for some of the terminals 24, and only the metal connection terminal may be used for the remaining terminals 24.

In the present embodiment, the 3 pins 71 of each of the two terminals 24 are arranged symmetrically with respect to a straight line passing through the center of the discharge tube 22 and the midpoint of the terminal 24. The connection lines 26 connected to the 3 leads 71 of the terminal 24 are drawn in a direction approaching the straight line. Therefore, the connecting string 26 can be collectively drawn near the point P4 of the body portion 20a and the point P5 of the container upper portion 20 b. Thus, the length of the connection line 26 can be set to be uniform and minimum. A part of the connecting thread 26 does not loosen in the container 20, and the thread workability is improved. The parts of the connection line 26 can be made common, and the parts cost can be reduced and the parts management efficiency can be improved.

Fig. 12 is a view similar to fig. 5, showing the upper surface of a part of the compressor 12 as viewed in the axial direction D0. In fig. 12, a plurality of power supply lines 27 are connected to a plurality of terminals 24 outside the container 20. A plurality of power lines 27 electrically connect the plurality of terminals 24 with an external power source.

The plurality of power lines 27 include a 1 st power line 27a connected to the 1 st terminal 24a and a 2 nd power line 27b connected to the 2 nd terminal 24 b. When the plurality of terminals 24 include terminals 24 different from the 1 st and 2

nd terminals

24a and 24b, the plurality of power lines 27 may include another power line 27 connected to the different terminal 24.

In a plan view, a portion of each power supply line 27 continuous with one end connected to each terminal 24 is drawn out of the existing range R2 of each terminal 24. The position where a certain power line 27 extends from one end of the power line 27 connected to a certain terminal 24 and crosses the boundary of the existing range R2 of the terminal 24 in a plan view is a position where the power line 27 is drawn out.

The direction in which each power line 27 is drawn from each terminal 24 may be any direction, but in the present embodiment, in a plan view, the 1 st power line 27a is drawn in a direction away from the 3 rd straight line L3, and the 2 nd power line 27b is drawn in a direction close to the 3 rd straight line L3. That is, in a plan view, the 1 st power supply line 27a is drawn in a direction away from the 3 rd straight line L3. In a plan view, the 2 nd power supply line 27b is drawn in a direction approaching the 3 rd straight line L3. Further, the following may be configured: in a plan view, the 1 st power line 27a is drawn in a direction approaching the 3 rd straight line L3, and the 2 nd power line 27b is drawn in a direction separating from the 3 rd straight line L3. Alternatively, the configuration may be such that: in a plan view, the 1 st power supply line 27a and the 2 nd power supply line 27b are drawn in a direction away from the 3 rd 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 20 b. In order to prevent erroneous connection when the compressor 12 is mounted on the refrigeration cycle apparatus 10 or when the compressor 12 is replaced, it is preferable that the power supply lines 27 are separated and clearly distinguished from each other even after the cover is attached, instead of concentrating the power supply lines 27 as in the comparative example shown in fig. 13. As shown in fig. 12, by drawing one of the power lines 27 in a direction away from a straight line passing through the center of the discharge pipe 22 and the midpoint of the plurality of terminals 24, erroneous wiring can be prevented.

Description of effects of embodiments

The angular range R1 is a range of 180 ° or less formed by a 1 st straight line L1 passing through the center P0 of the case 20 and the center P1 of the 1 st terminal 24a and a 2 nd straight line L2 passing through the center P0 of the case 20 and the center P2 of the 2 nd terminal 24b in a plan view. In the present embodiment, the connection wires 26 electrically connecting the terminals 24 and the motor 40 are drawn out of the range R2 of the terminals 24 at a position within the angular range R1 in a plan view. Therefore, the length of each connection line 26 can be shortened.

According to the present embodiment, a plurality of terminals 24 are provided without increasing the outer diameter of the container 20, so that a high-efficiency and high-speed operation can be realized, and a compact compressor 12 can be obtained.

According to the present embodiment, even if the portion of the container upper portion 20b near the terminal 24 and the discharge pipe 22 is increased, stress is less likely to concentrate in the region between the terminal 24 and the discharge pipe when the pressure inside the container 20 becomes high, and thus deformation of the container 20 is less likely to occur. Leakage of refrigerant gas and breakage of terminal 24 due to deformation of container 20 can be prevented.

According to the present embodiment, a plurality of sets of connection wires 26 for connecting the motor 40 and the terminals 24 are required, but the risk of wire breakage due to contact with a structure rotating at high speed together with the rotor 42 in the container 20 can be reduced. The efficiency of the work of connecting the connection wire 26 to the terminal 24 is improved.

In the present embodiment, the 1 st plane part 81 on which the terminal 24 is arranged is inclined with respect to a virtual vertical plane orthogonal to the axial direction D0. This extends 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. Therefore, even if the plurality of terminals 24 are provided while maintaining the outer diameter of the container 20, stress concentration between the discharge pipe 22 and the terminals 24 is suppressed, and deformation is less likely to occur in the container 20. That is, the strength of the container 20 can be ensured.

In addition, in a plan view, an angular range R1 connecting the center of the container 20 and the centers of the plurality of terminals 24 is 180 ° or less. The leading direction of the connecting wire 26 is within the angular range R1. This allows the plurality of groups of connecting wires 26 to be arranged while avoiding a structure that rotates at high speed together with the rotor 42, and allows the plurality of terminals 24 to be arranged in a concentrated manner. Thus, the disconnection of the connection wire 26 is not caused. The assembling workability becomes good. The arrangement of the terminals 24 can be easily performed.

Fig. 14 shows the results of comparison of the deformation amounts with respect to the internal pressure of the upper container portion 20b of the present embodiment and the upper container portion of the comparative example.

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

The deformation amount between the discharge pipe 22 and the terminal 24 of the container upper portion 20b is reduced to about 50% of the deformation amount of the comparative example. The amount of deformation of the center portion of the terminal 24 was reduced to about 80% of the amount of deformation of the comparative example. This is considered to be because the distance between the discharge tube 22 and the terminal 24 is sufficiently maintained. It is also considered that the case where the 1 st plane part 81 on which the terminal 24 is disposed and the curved surface part 83 on which the discharge tube 22 is disposed are connected by the smooth concave part 84 is one of important factors. As described above, it is understood that by adopting the structure of the container upper portion 20b according to the present embodiment, the stress concentration can be relaxed, 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 in the glass portion of the terminal 24 can be suppressed. Even if a flammable refrigerant having a low global warming coefficient, including R290, is sealed in container 20, the flammable refrigerant does not leak from container 20, thereby ensuring safety.

According to the present embodiment, even if refrigerant having a higher saturation pressure than R22 refrigerant is compressed, the strength of container 20 is sufficient, and therefore safety is ensured.

Other structures of

The present embodiment can be applied not only to the vertical compressor 12 but also to a case where a bowl-shaped closed container is pushed into an open portion of a cylindrical closed container in a horizontal compressor and a discharge pipe is provided at the center.

Embodiment mode 2

The present embodiment will be described mainly with reference to fig. 15 for differences from embodiment 1.

Fig. 15 shows an upper surface of a portion of compressor 12 as viewed in axial direction D0.

In embodiment 1, the plurality of terminals 24 are collectively arranged in one 1 st plane portion 81, but in the present embodiment, the plurality of terminals 24 are arranged separately in two or more 1 st plane portions 81.

The surface of each 1 st plane portion 81 is an oval shape such as an ellipse or a rounded rectangle. The edge of each 1 st plane part 81 is connected to the curved surface part 83 by a smoothly curved concave part 84. That is, a portion between the 1 st plane portion 81 and the curved surface portion 83 sinks. The concave portion 84 is formed thick and functions as a rib for improving strength.

In the present embodiment, each 1 st plane portion 81 is inclined in two directions with respect to the virtual vertical plane at an inclination angle that is away from the virtual vertical plane as approaching the central axis of the container 20.

Specifically, along the 1 st direction D1, the entire 1 st plane part 81 is inclined at the 1 st inclination angle θ 1 with respect to the virtual vertical plane. Thus, a portion of each 1 st plane portion 81 including one end in the 1 st direction D1 is separated from the virtual vertical plane as approaching the central axis of the container 20 along the 1 st direction D1. The remaining portion of each 1 st plane portion 81 including the other end in the 1 st direction D1 is separated from the virtual vertical plane along the 1 st direction D1 as being separated from the central axis of the container 20. The 1 st inclination angle θ 1 is preferably 5 ° or more and 30 ° or less, and in the present embodiment is 5 °.

In addition, along the 2 nd direction D2, the entire 1 st plane part 81 is inclined at the 2 nd inclination angle θ 2 with respect to the virtual vertical plane. Thus, a portion of each 1 st plane part 81 including one end in the 2 nd direction D2 is separated from the virtual vertical plane as approaching the central axis of the container 20 along the 2 nd direction D2. The remaining portion of each 1 st plane portion 81 including the other end in the 2 nd direction D2 is separated from the virtual vertical plane along the 2 nd direction D2 as being separated from the central axis of the container 20. The 2 nd inclination angle θ 2 is preferably 5 ° to 30 ° inclusive, and in the present embodiment is 10 °.

At least one of the 1 st inclination angle θ 1 and the 2 nd inclination angle θ 2 of the 1 st plane part 81 may be different for each 1 st plane part 81. That is, the inclination angle of the 1 st plane part 81 may be different for each terminal 24.

In the present embodiment, the lever 28 is disposed on the lower side of each 1 st plane portion 81. The rod 28 is arranged to extend in an axial direction D0.

Embodiment 3

In embodiment 1, the connection line 26 is integrated with the winding 44 of the motor 40, but as shown in fig. 16, the connection line 26 may be connected to the winding 44 of the motor 40 via a connection terminal 47.

Embodiment 4

In embodiment 1, the body portion 20a and the container lower portion 20c of the container 20 are connected by welding, but as shown in fig. 17, the body portion 20a and the container lower portion 20c of the container 20 may be integrally molded.

Description of the reference numerals

10 … refrigeration cycle device; 11 … refrigerant circuit; 12 … compressor; 13 … four-way valve; 14 … heat exchanger 1; 15 … expansion mechanism; 16 … heat exchanger No. 2; 17 … control device; 20 … container; 20a … torso; 20b … container upper portion; 20c … container lower portion; 21 … suction tube; 22 … discharge pipe; 23 … suction muffler; a 24 … terminal; 24a … terminal No. 1; 24b … terminal No. 2; 25 … refrigerator oil; 26 … connecting line; 26a … connection line 1; 26b … connection 2; 27 … power supply line; 27a … power line 1; 27b … power line 2; 28 … rod; 29 … oil separation plate; 30 … compression mechanism; 31 … cylinders; 32 … rotating the plunger; 33 … main bearing; 34 … secondary bearing; 35 … discharge muffler; 36 … fastener; a 40 … electric motor; 41 … stator; 42 … rotor; 43 … stator core; 44 … windings; 45 … rotor core; 46 … permanent magnet; 47 … connection terminal; 50 … crankshaft; 51 … eccentric shaft portion; 52 … a main shaft portion; 53 … minor shaft portion; 54 … through holes; 61 … cylinder chamber; 62 … vane slot; 63 … back pressure chamber; 64 … blade; 71 … pin; 72 … bundled wires; 81 … flat part 1; 81a … end; 81b … end; 82, 82 …, 2 nd planar portion; 83 … curved surface portion; 84 … recess; 85 … annular member; d0 … axial; d1 … direction 1; d2 … direction 2; the H1 … distance; l1 … line 1; l2 … line 2; l3 … line 3; a P0 … center; a P1 … center; a P2 … center; midpoint P3 …; point P4 …; point P5 …; point P6 …; point P7 …; r1 … angular range; r2 … exists within a range; θ 1 … inclination angle 1; θ 2 … angle 2.

Claims

1. A compressor, characterized in that it has:

a compression mechanism, which compresses the refrigerant;

an electric motor that drives the compression mechanism;

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

A plurality of terminals, including a first terminal and a second terminal, are mounted on one axial end of the container, and when viewed from above, their centers are located between the center of the container and the center of the first terminal. a first straight line, within an angle range of 180° or less formed by a second straight line passing through the center of the container and the center of the second terminal; and

A plurality of connecting wires, which electrically connect the plurality of terminals to the motor in the container, are drawn out from the plurality of terminals within the angular range in a plan view.

2. The compressor of claim 1, wherein:

The plurality of connecting lines are arranged within the angle range in a plan view.

3. The compressor according to claim 1 or 2, characterized in that,

The plurality of connection wires include a first connection wire that electrically connects the first terminal and the motor, and a second connection wire that electrically connects the second terminal and the motor,

When viewed from above, the first connection line and the second connection line are drawn out in a direction close to a third straight line passing through the center of the container and the first terminal. the midpoint between the center and the center of the second terminal.

4. The compressor according to claim 1 or 2, characterized in that,

also includes 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,

In a plan view, at least any one of the first power supply line and the second power supply line is drawn out in a direction away from a third straight line passing through the center of the container and the connection point The midpoint of a line segment formed by the center of the first terminal and the center of the second terminal.

5. The compressor of claim 3, wherein:

The first terminal and the second terminal respectively have three pins,

The three leads of the first terminal and the three leads of the second terminal are arranged symmetrically with respect to the third straight line.

6. The compressor according to claim 1 or 2, characterized in that,

At least one connection wire included in the plurality of connection wires is connected to one terminal included in the plurality of terminals via a bundled wire.

7. The compressor according to claim 1 or 2, characterized in that,

The compressor further includes a discharge pipe provided at an axial end of the container at a position overlapping the central axis of the container in order to discharge the refrigerant to the outside of the container,

The container has, at one end in the axial direction, a curved portion on which the discharge pipe is arranged, and one or more flat portions located between the plurality of terminals and the motor and with respect to the electric motor. An imaginary vertical plane in which the axial direction of the container is vertical is inclined along at least one direction at an inclination angle that moves away from the imaginary vertical plane as it approaches the central axis of the container, and the plurality of terminals are arranged.

8. The compressor of claim 7, wherein:

The inclination angle is 5° or more and 30° or less with respect to the virtual vertical plane.

9. The compressor of claim 7, wherein:

At least a part of the one or more flat surfaces including one end in a first direction orthogonal to the axial direction is along the first direction with respect to the virtual vertical plane so as to be closer to the central axis of the container. The first inclination angle away from the imaginary vertical plane is inclined,

At least a part of the one or more flat surfaces including one end in a second direction perpendicular to the axial direction and the first direction is along the second direction with respect to the virtual vertical plane so as to approach all The center axis of the container is inclined at a second inclination angle away from the virtual vertical plane.

10. The compressor of claim 9, wherein:

The second inclination angle is different from the first inclination angle.

11. The compressor of claim 7, wherein:

The plurality of terminals are collectively arranged on one plane portion.

12. The compressor of claim 7, wherein:

The plurality of terminals are separately arranged on two or more flat surfaces.

13. The compressor of claim 7, wherein

The container has another flat portion at one end in the axial direction of the container, the maximum distance of the other flat portion from the virtual vertical plane is smaller than that of the one or more flat surface portions, and the plurality of flat portions are arranged. Accessories with different terminals.

14. The compressor of claim 7, wherein:

and also includes a rod to which a cover for covering the plurality of terminals is attached,

The said container has another flat surface part in which the said rod is arrange|positioned at the axial direction end of the said container.

15. The compressor of claim 7, wherein:

The discharge pipe is joined to the curved surface portion via an annular member, and extends in the container to a position closer to the compression mechanism than the annular member.

16. The compressor of claim 7, wherein:

One end of the axial direction of the container is in a circular shape when viewed from above,

The outer diameter of the discharge pipe is 0.1 times or more the outer diameter of the axial end of the container.

17. The compressor of claim 1 or 2, wherein:

In a plan view, a portion of each connecting wire that is continuous with one end connected to each terminal is drawn out of the existing range of each terminal at a position within the above-mentioned angular range.

18. A refrigeration cycle device, characterized in that:

The compressor according to any one of claims 1 to 17 is provided.