KR102328761B1 - Compressors and refrigeration cycle units - Google Patents

Abstract

In the compressor, 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 first terminal 24a and the second terminal 24b are attached at a position shifted from the central axis of the container 20 at one end of the container 20 in the axial direction. The 1st connection line 26a and the 2nd connection line 26b are guided along the inner peripheral wall 20d of the container 20, and are each 1st terminal in the container 20 without intersecting each other in plan view. (24a) and the second terminal 24b are electrically connected to the electric motor.

Description

Compressors and refrigeration cycle units

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

In the hermetic electric compressor in which the compression mechanism part and the electric motor part are accommodated in the sealed container, the electric motor part is comprised by the rotor and the stator. The rotor is connected to the compression mechanism part via a main shaft. The stator is fixed to the sealed container by a method such as shrink fit. The stator is connected to the hermetic terminal arrange|positioned in the sealed container by the connection wire connected to the winding of a stator. When external power is applied through the airtight terminal, the compression mechanism is driven.

In Patent Documents 1 to 3, two airtight terminals are provided in an airtight container, and one of the airtight terminals is connected to an electric motor as a means for achieving both high efficiency during low-speed rotation and operability at high rotational speed. A hermetic motor-compressor is disclosed in which the first connecting line of the winding and the connecting box are connected, and the other end of the hermetic terminal is connected with the second connecting line of the winding of the motor section.

Patent Document 2 discloses a method for connecting the first and second connecting lines to each other as a means for preventing the first connecting line and the second connecting line from coming into contact with the sealed container, the rotor or the discharge pipe and disconnection. A hermetic electric compressor provided with a resin connecting material is disclosed.

Patent Document 1: Japanese Patent Laid-Open No. 2006-246674 Patent Document 2: Japanese Patent Laid-Open No. 2009-191822 Patent Document 3: Japanese Patent Laid-Open No. 2012-082776

In the hermetic motor compressor described in Patent Documents 1 to 3, the connection line passes through the vicinity of the discharge pipe. Although the connecting lines intersect each other regardless of the length dimension, there is a possibility that they may cross each other as the length dimension is larger, or they are connected to each other by a connecting material. Therefore, the oil rolled up in the upper space of the airtight container is retained at the intersection or the connecting portion of the connecting line, and is easily taken out of the compressor from the discharge pipe together with the compressed refrigerant gas. As a result, the reliability of the compressor deteriorates due to oil depletion.

An object of this invention is to reduce the oil remaining in a connection line.

A compressor according to an aspect of the present invention,

a compression mechanism for compressing the refrigerant;

an electric motor for driving the compression mechanism;

a container accommodating the compression mechanism and the electric motor;

a first terminal and a second terminal attached to an axial end of the container;

A first connecting line and a first connecting line that are guided along the inner peripheral wall of the container and electrically connect the first terminal and the second terminal to the electric motor in the container without intersecting each other in a plan view 2 A connection line is provided.

In the present invention, the connecting wire is guided along the inner peripheral wall of the container. Therefore, even if the length dimension of the connection wire is large, the connection wire does not intersect each other, and it is hard to generate|occur|produce in the connection wire the part where the oil remained.

1 is a circuit diagram of a refrigeration cycle device according to a first embodiment;
Fig. 2 is a circuit diagram of a refrigeration cycle device according to the first embodiment;
Fig. 3 is a longitudinal sectional view of the compressor according to the first embodiment;
Fig. 4 is a cross-sectional view of a part of the compressor according to the first embodiment;
Fig. 5 is a plan view of a part of the compressor according to the first embodiment;
6 is a plan view of a part of a compressor according to a comparative example;
Fig. 7 is a plan view of a part of a compressor according to a second embodiment;
Fig. 8 is a longitudinal sectional view of the compressor according to the third embodiment;
Fig. 9 is a longitudinal sectional view of the compressor according to the fourth embodiment;

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described using drawings. In each figure, the same code|symbol is attached|subjected to the same or corresponding part. In the description of the embodiments, descriptions of the same or corresponding parts are omitted or simplified as appropriate. In addition, this invention is not limited to embodiment demonstrated below, Various changes are possible according to necessity. For example, among the embodiments described below, two or more embodiments 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 6 .

[0013]

***Description of configuration***

With reference to FIG. 1 and FIG. 2, the structure of the refrigeration cycle apparatus 10 which concerns on this embodiment is demonstrated.

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

Although the refrigeration cycle device 10 is an air conditioner in this embodiment, devices other than an air conditioner such as a refrigerator or a heat pump cycle device may be used.

The refrigeration cycle device (10) includes a refrigerant circuit (11) through which refrigerant circulates. The refrigeration cycle device 10 includes a compressor 12 , a four-way valve 13 , a first heat exchanger 14 serving as an outdoor heat exchanger, an expansion mechanism 15 serving as an expansion valve, and a second heat exchanger serving as an indoor heat exchanger. A group 16 is also provided. The compressor 12 , the four-way valve 13 , the first heat exchanger 14 , the expansion mechanism 15 , and the second heat exchanger 16 are connected to the refrigerant circuit 11 .

The compressor 12 compresses the refrigerant. The four-way valve 13 switches the direction in which the refrigerant flows during the cooling operation and the heating operation. The first heat exchanger 14 operates as a condenser during the cooling operation to dissipate heat from the refrigerant compressed by the compressor 12 . That is, the first heat exchanger 14 performs heat exchange using the refrigerant compressed by the compressor 12 . The first heat exchanger 14 operates as an evaporator during the heating operation to heat 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 radiated by the condenser. The second heat exchanger 16 operates as a condenser during the heating operation to radiate heat from 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 to heat the refrigerant by exchanging heat between the indoor air and the refrigerant expanded by the expansion mechanism 15 .

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

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

As the refrigerant circulating in 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), R1132a, R1141, R1234yf, R1234ze(E) or R1234ze(Z) are used. Alternatively, natural refrigerants 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 for Hydrofluorocarbon. "HFO" is an abbreviation for Hydrofluoroolefin.

With reference to FIG. 3, the structure of the compressor 12 which concerns on this embodiment is demonstrated.

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

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

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

The container 20 is specifically, an airtight container. Refrigeration oil 25 is stored at the bottom of the container 20 . A suction pipe 21 for sucking the refrigerant into the container 20 and a discharge pipe 22 for discharging the refrigerant to the outside of the container 20 are attached to the container 20 .

The electric motor 40 is accommodated in the container 20 . Specifically, the electric motor 40 is provided in the inner upper part of the container 20 . The electric motor 40 is a centralized winding motor in the present embodiment, but may be a distributed winding motor.

The compression mechanism 30 is accommodated in the container 20 . Specifically, the compression mechanism 30 is provided in the lower inner side of the container 20 . That is, the compression mechanism 30 is arranged below the electric motor 40 in the container 20 .

The crankshaft 50 connects the electric motor 40 and the compression mechanism 30 . The crankshaft 50 forms the oil supply path of the refrigerating machine oil 25 and the rotating shaft of the electric motor 40. As shown in FIG.

The refrigerating machine oil 25 is pumped up by oil supply mechanisms, such as an oil pump provided in the lower part of the crankshaft 50, with rotation of the crankshaft 50. As shown in FIG. And the refrigerating machine oil 25 is supplied to each slide part of the compression mechanism 30, and each slide part of the compression mechanism 30 is lubricated. As the refrigerating machine oil 25, synthetic oil, such as POE, PVE, or AB, is used. "POE" is an abbreviation for Polyolester. "PVE" is an abbreviation for Polyvinyl Ether. "AB" is an abbreviation for Alkylbenzene.

The electric motor 40 rotates the crankshaft 50 . The compression mechanism 30 compresses the refrigerant by being driven by the rotation of the crankshaft 50 . That is, the compression mechanism 30 compresses the refrigerant by being driven by the rotational force of the electric motor 40 transmitted 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 within the container 20 .

The crankshaft 50 has an eccentric shaft portion 51 , a main shaft portion 52 , and a sub shaft portion 53 . These are provided in the order of the main shaft part 52, the eccentric shaft part 51, and the sub-axis part 53 in the axial direction. That is, the main shaft part 52 is provided on the axial direction one end side of the eccentric shaft part 51, and the minor shaft part 53 is provided in the other axial direction end side of the eccentric shaft part 51. As shown in FIG. The eccentric shaft portion 51, the main shaft portion 52, and the minor shaft portion 53 are each cylindrical. The main shaft portion 52 and the minor shaft portion 53 are provided so that their central axes coincide with each other, ie, coaxially. The eccentric shaft part 51 is provided so that a central axis may deviate from the central axis of the main shaft part 52 and the sub-axis part 53. As shown in FIG. When the main shaft portion 52 and the minor shaft portion 53 rotate around the central axis, the eccentric shaft portion 51 rotates eccentrically.

Hereinafter, the detail of the container 20 is demonstrated.

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

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

Hereinafter, the details of the electric motor 40 will be described.

Although the electric motor 40 is a brushless DC motor in this embodiment, motors other than a brushless DC motor, such as an induction motor, may be sufficient. "DC" is an abbreviation for Direct Current.

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

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

The stator 41 has a stator iron core 43 and a winding 44 . The stator iron core 43 is manufactured by punching a plurality of electromagnetic steel sheets containing iron as a main component into a predetermined shape, laminating them in the axial direction, and fixing them by caulking. The thickness of each electrical steel sheet is, for example, 0.1 mm or more and 1.5 mm or less. The stator iron 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 inner side of the body portion 20a of the container 20 by shrink fit. The winding 44 is wound around the stator core 43 . Specifically, the winding 44 is wound around the stator iron core 43 in a central winding through an insulating member. The winding 44 consists of a core wire and at least one layer of film covering the core wire. In this 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 sheets of the stator core 43 to each other is not limited to caulking, but other methods, such as welding, may be sufficient. 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 fit, and other methods such as press-fitting or welding may be used. 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 phenolic resin. "PBT" is an abbreviation for Polybutylene Terephthalate. "FEP" is an abbreviation for Fluorinated Ethylene Propylene. "PFA" is an abbreviation for Perfluoroalkoxy Alkane. "PTFE" is an abbreviation for Polytetrafluoroethylene. "LCP" is an abbreviation for Liquid Crystal Polymer. "PPS" is an abbreviation for Polyphenylene Sulfide.

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

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

A shaft hole into which the main shaft portion 52 of the crankshaft 50 is shrink-fitted or press-fitted is formed in the center of the rotor iron core 45 in plan view. That is, the inner diameter of the rotor core 45 is smaller than the outer diameter of the main shaft portion 52 . Although not shown, a plurality of through holes penetrating in the axial direction are formed around the shaft hole of the rotor core 45 . Each of the through holes serves as one of the passages for the gas refrigerant discharged from the discharge muffler 35 to be described later to the space in the container 20 . Each of the through holes becomes one of the passages for dropping the refrigerating machine oil 25 guided to the upper part of the container 20 to the lower part of the container 20 .

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

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

The container upper part 20b is also provided with the discharge pipe 22 which the axial direction both ends were opened. 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 inside the container 20 , the discharge pipe 22 . ) through the external refrigerant circuit 11 is discharged.

The oil separation plate 29 separates the refrigerating machine oil 25 in the container 20 pumped up together with the refrigerant. The oil separation plate 29 is press-fitted to the crankshaft 50 and rotates with the rotation of the crankshaft 50 . Alternatively, the oil separation plate 29 is fixed to the rotor 42 using a fixture such as a rivet, and rotates with the rotation of the rotor 42 . The refrigerating machine oil 25 has a larger specific gravity than the refrigerant. Therefore, the oil separation plate 29 can be separated by blowing the refrigerating machine oil 25 in the outer circumferential direction by centrifugal force.

Although the discharge pipe 22 may be provided in the outer peripheral part of the container upper part 20b, in this embodiment, it is directly above the crankshaft 50, and is provided in the center part of the container upper part 20b. Assuming that the discharge pipe 22 is provided on the outer periphery of the upper part of the container 20b, the refrigerating machine oil 25 separated by the oil separation plate 29 enters the discharge pipe 22 and is discharged out of the container 20 . Thereby, the quantity of the refrigerating machine oil 25 in the container 20 decreases, and there exists a possibility that the lubricity of the compression mechanism 30 may fall. In order to prevent such a decrease in lubricity, it is preferable that the discharge pipe 22 is provided in the central part of the upper part of the container 20b. It is preferable that the outer diameter of the discharge pipe 22 is 0.1 times or more and 0.2 times or less of the outer diameter of the container upper part 20b.

In this embodiment, resistance welding is used as a method of attaching the discharge pipe 22 to the container upper part 20b. The discharge pipe 22 is joined to the container upper part 20b via a ring material 27 . The material of the ring material 27 is iron. By attaching the ring member 27 to the discharge pipe 22 and pressing the inclined portion of the ring member 27 to the container upper part 20b, the container upper part 20b is formed on the entire circumference of the ring member 27 without a gap. In contact, weldability is improved. The discharge pipe 22 extends to a position closer to the compression mechanism 30 than the ring member 27 in the container 20 . In this way, by projecting the discharge pipe 22 toward the compression mechanism 30 rather than the ring member 27 , the refrigerating machine oil 25 trapped in the inclined portion of the ring member 27 is prevented from entering the discharge pipe 22 . can be suppressed

The method for attaching the discharge pipe 22 to the container upper portion 20b is not limited to resistance welding, and other methods such as gas welding using brazing filler metal 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 terminal 24 is attached by resistance welding after the discharge pipe 22 is attached by gas welding, distortion will occur on the surface of the portion to which the terminal 24 is attached of the upper container 20b. There are concerns. If distortion occurs, the surface of the container upper portion 20b and the surface of the terminal 24 do not come into contact with each other, and there is a risk of welding failure occurring during resistance welding. Therefore, also in the welding of the discharge pipe 22, it is preferable to reduce the heat input amount and reduce the heat input range by using resistance welding or laser welding.

Hereinafter, with reference to FIG. 4 as well as FIG. 3, the detail of the compression mechanism 30 is demonstrated.

4 shows a cross section of a part of the compressor 12 taken along the axial direction. In addition, in FIG. 4, the hatching which shows a cross section is abbreviate|omitted.

The compression mechanism (30) has a cylinder (31), a rolling piston (32), a main bearing (33), a supporting 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 sucking the gas refrigerant from the refrigerant circuit (11) is provided on the outer peripheral surface of the cylinder (31). The refrigerant sucked in from the suction port is compressed in the cylinder chamber (61). The cylinder 31 is opened at both ends in the axial direction.

The rolling piston 32 is ring-shaped. Accordingly, the inner periphery and the outer periphery of the rolling piston 32 are circular in plan view. The rolling piston 32 rotates eccentrically in the cylinder chamber 61 . The rolling piston 32 is slidably fitted to the eccentric shaft part 51 of the crankshaft 50 used as the rotating shaft of the rolling piston 32. As shown in FIG.

The cylinder (31) is provided with a vane groove (62) that continues to the cylinder chamber (61) and extends 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, there is provided a vane 64 for dividing the cylinder chamber 61 into a suction chamber which is a low pressure operation chamber and a compression chamber which is a high pressure operation chamber. The vane 64 has a plate shape with a rounded tip. The vane 64 reciprocates while sliding in the vane groove 62 . The vane 64 is always pressed against the rolling piston 32 by a vane spring provided in the back pressure chamber 63 . Since the inside of the container 20 is high pressure, when the operation of the compressor 12 starts, the pressure in the container 20 and the pressure in the cylinder The force of the car acts. For this reason, the vane spring is mainly used for the purpose of pressurizing the vane 64 to the rolling piston 32 at the time of starting of the compressor 12 with no difference in the pressure in the container 20 and the cylinder chamber 61. As shown in FIG.

The main bearing 33 is a bearing of an inverted T-shape when viewed from the side. The spindle bearing 33 is slidably fitted to the spindle portion 52 which is a portion above the eccentric shaft portion 51 of the crankshaft 50 . Inside the crankshaft (50), a through hole (54) serving as an oil supply passage is provided along the axial direction, and between the spindle receiving (33) and the main shaft portion (52) is sucked through the through hole (54). An oil film is formed by supplying the loaded refrigerating machine oil 25 . The spindle bearing 33 closes the cylinder chamber 61 and the upper side of the vane groove 62 of the cylinder 31 . That is, the spindle bearing 33 closes the upper sides of the two operation chambers in the cylinder 31 .

The bearing 34 is a bearing of a T-shape when viewed from the side. The supporting bearing 34 is slidably fitted to the supporting shaft portion 53 that is a portion lower than the eccentric shaft portion 51 of the crankshaft 50 . An oil film is formed between the support receiver 34 and the support shaft part 53 by supplying the refrigerating machine oil 25 sucked up through the through hole 54 of the crankshaft 50 . The bearing 34 is blocking the cylinder chamber 61 and the lower side of the vane groove 62 of the cylinder 31 . That is, the bearing 34 is blocking the lower sides of the two operation chambers in the cylinder 31 .

The main bearing 33 and the supporting bearing 34 are respectively fixed to the cylinder 31 by fasteners 36 such as bolts, and support the crankshaft 50 which is the rotating shaft of the rolling piston 32 . The spindle bearing 33 supports the spindle portion 52 without contacting the spindle portion 52 by fluid lubrication of the oil film between the spindle bearing 33 and the spindle portion 52 . The supporting bearing 34 supports the supporting shaft part 53 without contacting the supporting shaft part 53 by fluid lubrication of the oil film between the supporting bearing 34 and the supporting shaft part 53, similarly to the spindle bearing 33. are doing

Although not shown, the spindle 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 in a position connected to the compression chamber when the cylinder chamber 61 is partitioned into the suction chamber and the compression chamber by the vanes 64 . A discharge valve for freely opening and closing the discharge port is attached to the spindle 33 . The discharge valve closes until the gas refrigerant in the compression chamber reaches a desired pressure, and opens when the gas refrigerant in the compression chamber reaches a desired pressure. 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 spindle (33). The high-temperature and high-pressure gas refrigerant discharged when the discharge valve is opened once enters the discharge muffler 35 , and then is discharged from the discharge muffler 35 to the space inside the container 20 .

In addition, the discharge port and the discharge valve may be provided in the support bearing 34 or both of the main bearing 33 and the support bearing 34 . The discharge muffler 35 is attached to the outside of the bearing provided with the discharge port and the discharge valve.

Next to the container 20, a suction muffler 23 is provided. The suction muffler 23 sucks in the low-pressure gas refrigerant from the refrigerant circuit 11 . The suction muffler 23 suppresses the liquid refrigerant from entering the cylinder chamber 61 of the cylinder 31 directly when the liquid refrigerant returns. The suction muffler 23 is connected to the suction port provided on the outer peripheral surface of the cylinder 31 via the suction pipe 21 . The suction port is in a position connected to the suction chamber when the cylinder chamber 61 is partitioned into the suction chamber and the compression chamber by the vane 64 . The body of the suction muffler 23 is fixed to the side surface of the body 20a of the container 20 by welding or the like.

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

Although not shown, when the compressor 12 is comprised as a swing type rotary compressor, the vane 64 is provided integrally with the rolling piston 32. As shown in FIG. When the crankshaft 50 is driven, the vanes 64 reciprocate along the grooves of the support rotatably attached to the rolling piston 32 . The vane 64 moves forward and backward in the radial direction while swinging according to the rotation of the rolling piston 32 to partition the inside of the cylinder chamber 61 into a compression chamber and a suction chamber. The support body is composed of two mold-shaped members having a semicircular cross section. The support body is rotatably fitted into the circular holding hole formed in the middle part between the intake port and the discharge port of the cylinder (31).

***Description of action***

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

Electric power is supplied from the terminal 24 to the stator 41 of the electric motor 40 through the connection line 26 . As a result, a current flows in the winding 44 of the stator 41 , and magnetic flux is generated in the winding 44 . The rotor 42 of the electric motor 40 rotates by the action of the magnetic flux generated in the winding 44 and the magnetic flux generated in the permanent magnet 46 of the rotor 42 . Specifically, the rotor 42 is formed by the suction and repulsion action of the rotating magnetic field generated by the current flowing in the winding 44 of the stator 41 and the magnetic field of the permanent magnet 46 of the rotor 42 . rotate By rotation of the rotor 42 , the crankshaft 50 fixed to the rotor 42 rotates. With the rotation of the crankshaft 50 , the rolling piston 32 of the compression mechanism 30 eccentrically rotates in the cylinder chamber 61 of the cylinder 31 of the compression mechanism 30 . The cylinder chamber 61, which is a space between the cylinder 31 and the rolling piston 32, is divided by a vane 64 into a suction chamber and a compression chamber. With the rotation of the crankshaft 50, the volume of the suction chamber and the volume of the compression chamber change. In the suction chamber, the low-pressure gas refrigerant is sucked from the suction muffler 23 through the suction pipe 21 by gradually expanding the volume. In the compression chamber, the gas refrigerant inside is compressed by gradually reducing the volume. The compressed, high-pressure and high-temperature gaseous refrigerant is discharged from the discharge muffler 35 into the space within the container 20 . The discharged gas refrigerant also passes through the electric motor 40 and is discharged out of the container 20 from the discharge pipe 22 in the container upper part 20b. The refrigerant discharged from the container 20 passes through the refrigerant circuit 11 and returns to the suction muffler 23 again.

***Detailed description of the configuration***

In addition to FIG. 3, with reference to FIG. 5 and FIG. 6, the detail of the structure of the compressor 12 which concerns on this embodiment is demonstrated.

Fig. 5 shows an upper surface of a part of the compressor 12 viewed along the axial direction.

The container upper part 20b is circular in planar view.

The discharge pipe 22 is provided in the center of the container upper part 20b. That is, the discharge pipe 22 is provided at a position overlapping the central axis of the container 20 at one end of the container 20 in the axial direction.

In the upper part of the container 20b, a plurality of terminals 24 are provided around the discharge pipe 22 . That is, the plurality of terminals 24 are attached at positions shifted from the central axis of the container 20 at one end of the container 20 in the axial direction. The plurality of terminals 24 are electrically connected to the electric motor 40 in the container 20 via the plurality of connection lines 26 . Each terminal 24 is fitted in a through hole provided in the upper part of the container 20b. The outermost shell of each terminal 24 is in contact with the inner periphery of the through hole.

Although abbreviate|omitted in FIG. 5, the rod 28 extended along the axial direction is also provided in the container upper part 20b.

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

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

Further, the plurality of terminals 24 may include a terminal 24 separate from the first terminal 24a and the second terminal 24b.

The plurality of connection lines 26 include a first connection line 26a for electrically connecting the first terminal 24a and the electric motor 40 in the container 20 , and a second terminal 24b in the container 20 , A second connection line 26b for electrically connecting the electric motor 40 is included.

Further, when the plurality of terminals 24 includes a terminal 24 separate from the first terminal 24a and the second terminal 24b , the plurality of connection lines 26 have the separate terminals in the container 20 . A separate connection line 26 for electrically connecting the terminal 24 and the electric motor 40 may be included.

The first connection line 26a and the second connection line 26b are guided along the inner peripheral wall 20d of the container 20 . Therefore, even if the length dimension of either or both of the first connection line 26a and the second connection line 26b is large, the first connection line 26a and the second connection line 26b are viewed in plan view. The electric motor 40 can be electrically connected to the 1st terminal 24a and the 2nd terminal 24b in the container 20, respectively, without crossing each other.

For example, as shown in FIG. 6, if the 1st connection line 26a and the 2nd connection line 26b cross each other in plan view, the refrigeration oil 25 rolled up in the upper space of the container 20. It stays in the intersection of the 1st connection line 26a and the 2nd connection line 26b, and it is easy to carry out from the discharge pipe 22 to the outside of the container 20 together with the compressed refrigerant gas. As a result, compared to the case where there is only one airtight terminal of the sealed container, the oil circulation rate increases, and there is a fear that the reliability of the compressor 12 may be deteriorated due to oil depletion. In this embodiment, by not generating the intersection of the 1st connection line 26a and the 2nd connection line 26b, the fall of the reliability of the compressor 12 by oil depletion can be prevented.

Further, when the plurality of connection lines 26 includes a connection line 26 separate from the first connection line 26a and the second connection line 26b, the first connection line 26a and the separate connection line 26a are included. It is required that the connecting lines 26 do not intersect each other in plan view, and that the second connecting line 26b and the separate connecting line 26 also do not intersect each other in plan view. Accordingly, it is preferable that the separate connection line 26 is also guided along the inner peripheral wall 20d of the container 20 .

In this embodiment, the 1st connection line 26a and the 2nd connection line 26b are a some lead wire, respectively. Specifically, the first connection line 26a is composed of three lead wires W1, W2, and W3, and the second connection line 26b is composed of three lead wires W4, W5, W6.

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

At least one lead wire included in the first connection line 26a and at least one lead wire included in the second connection line 26b are directed toward each other from the first terminal 24a and the second terminal 24b, respectively. After being taken out to the container 20, it is guided along the inner peripheral wall 20d of the container 20 in a mutually separated direction. Specifically, a set of three lead wires W1, W2, W3 and a set of two lead wires W4, W5 are taken out from the first terminal 24a and the second terminal 24b in a direction adjacent to each other, respectively. Then, along the inner peripheral wall 20d of the container 20, it is guided in the mutually separated direction. That is, the lead wires W1, W2, and W3 are taken out from the first terminal 24a and then bent into a substantially U-shape in plan view, and the portions from the bent portions to the connecting terminals T1, T2 and T3, respectively. It is guided along the inner peripheral wall 20d of this container 20. The lead wires W4 and W5 are taken out from the second terminal 24b in a direction close to the lead wires W1, W2, and W3, and then are bent into a substantially U-shape in plan view, and the connection terminals ( The portions up to T4 and T5 are guided along the inner peripheral wall 20d of the container 20 in a direction away from the lead wires W1, W2, and W3. Therefore, even if the length dimension of either or both of the first connection line 26a and the second connection line 26b is further increased, the first connection line 26a and the second connection line 26b can be viewed in plan view. The electric motor 40 can be electrically connected to the 1st terminal 24a and the 2nd terminal 24b in the container 20, respectively, without intersecting each other.

In this embodiment, the length dimension of the lead wire W6 is relatively small. Therefore, the lead wire W6 is taken out from the second terminal 24b in a direction close to the lead wires W1, W2, and W3, and then bent into a substantially S-shape in plan view, from the second bent position. A portion up to the connection terminal T6 is guided along the inner peripheral wall 20d of the container 20 in a direction adjacent to the lead wires W1, W2, and W3. However, when the length dimension of the lead wire W6 is not small, it is preferable that the lead wire W6 is also arrange|positioned similarly to the lead wires W4 and W5. That is, the lead wire W6 is also taken out from the second terminal 24b in a direction close to the lead wires W1, W2, and W3, and then bent into a substantially U-shape in plan view, and the connecting terminal ( It is preferable that the portion up to T6) is guided along the inner peripheral wall 20d of the container 20 in a direction away from the lead wires W1, W2, W3.

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

The first terminal 24a and the second terminal 24b each have three pins 71 . For the connection between the first connection line 26a and the first terminal 24a and the connection between the second connection line 26b and the second terminal 24b, the metal connection terminal is covered with a resin cover, respectively. A cluster 72 is used. Since the three pins 71 can be connected at once, workability is improved.

In addition, in order to prevent misconnection between the first terminal 24a and the second terminal 24b, the cluster 72 is provided on either one of the first terminal 24a and the second terminal 24b. A metal connection terminal without a cover may be used for the other terminal 24. Moreover, in order to prevent the refrigeration oil 25 from staying in the cluster 72, you may use the metal connection terminal without a cover for both the 1st terminal 24a and the 2nd terminal 24b.

Regarding the positional relationship between the connection terminal 47 at one end of the connection line 26, the cluster 72 at the other end of the connection line 26, and the discharge pipe 22, in a plan view, the connection terminal 47 and Although the positional relationship in which the discharge pipe 22 is disposed between the clusters 72 may be sufficient, in the present embodiment, the discharge pipe 22 is not disposed between the connection terminal 47 and the cluster 72 in a plan view. It is a positional relationship that is not By employing such a positional relationship, the connection line 26 can be removed from the discharge pipe 22 more reliably. The same applies to the case where a metal connection terminal without a cover is used without using the cluster 72 for the other end of the connection line 26 .

***Description of the effect of the embodiment ***

In this embodiment, the connecting wire 26 is guided along the inner peripheral wall 20d of the container 20 . Therefore, even if the length dimension of the connection wire 26 is large, the connection wire 26 does not cross each other, and the part where the refrigeration oil 25 stayed is hard to produce in the connection wire 26. As shown in FIG.

In this embodiment, the 1st connection line 26a and the 2nd connection line 26b electrically connected to the winding 44 of the stator 41 do not intersect, and the 1st terminal of the upper part 20b of a container does not cross. It is connected to (24a) and the second terminal (24b). Therefore, there is no intersecting portion of the connection line 26 in which the refrigerating machine oil 25 easily stays, and the refrigerating machine oil 25 is hardly taken out of the compressor 12 together with the refrigerant gas from the discharge pipe 22 . As a result, an increase in the oil circulation rate can be prevented. Thereby, it is possible to achieve both high efficiency during low-speed rotation and operability at high rotational speed, and the highly reliable compressor 12 can be obtained.

***OTHER CONFIGURATIONS***

This embodiment is applicable not only to the vertical compressor 12 but also to the horizontal compressor, where a cylindrical hermetic container is press-fitted into the release part of the cylindrical hermetic container, and a discharge pipe is provided in the center. can do.

In order to prevent the connection wire 26 from coming into contact with the rotor 42 and being disconnected due to the slack of the connection wire 26, it is connected to three pins of the terminal 24, and the connection wire 26 is The three lead wires constituting may be bound together with a plastic sleeve. In that case, in order to suppress retention of the refrigerating machine oil 25 in the sleeve, it is preferable that the length of the sleeve is 60% or less of the length of the shortest lead wire. Specifically, the three lead wires W1, W2, W3 constituting the first connection line 26a have a length of 60% or less of the shortest lead wire W3 among these three lead wires W1, W2, W3. It is preferable to be tied by a sleeve having Similarly, the three lead wires W4, W5, and W6 constituting the second connection line 26b have a length of 60% or less of the shortest lead wire W6 among these three lead wires W4, W5, W6. It is preferable to be tied by a sleeve.

Embodiment 2.

Regarding this embodiment, the difference from Embodiment 1 is mainly demonstrated using FIG.

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

As described above, in the present embodiment, the plurality of connection terminals 47 of the first connection line 26a are a straight line connecting the center of the first terminal 24a and the center of the discharge pipe 22 in plan view, respectively. With respect to L3), it is arrange|positioned within the range of +/-60 degree|times around the center of the discharge pipe 22. Similarly, each of the plurality of connection terminals 47 of the second connection line 26b has a straight line connecting the center of the second terminal 24b and the center of the discharge pipe 22 in a plan view, with respect to the discharge pipe 22 . It is placed within a range of ±60 degrees around the center of the Therefore, by connecting the first connection line 26a to the first terminal 24a and the second connection line 26b to the second terminal 24b, the first connection line 26a and the second connection line ( Each lead wire included in 26b) can be prevented from passing close to the discharge pipe 22 . Therefore, it becomes difficult for the refrigeration oil 25 to be taken out of the compressor 12 together with the refrigerant gas from the discharge pipe 22 . In addition, it is possible to easily connect each lead wire included in the first connection line 26a and the second connection line 26b without extending more than necessary. Therefore, it is possible to prevent the connection wire 26 from loosening in the container 20 and disconnection by contact with the rotor 42 even if new parts such as a connecting material connecting the connection wires 26 are not added. have.

Embodiment 3.

In the first embodiment, the connection line 26 is connected to the winding 44 of the electric motor 40 via a connection terminal 47, but as shown in FIG. 8 , the connection line 26 is connected to the electric motor 40 . It may be integrated with the winding 44 of That is, the connecting line 26 extending from the winding 44 of the electric motor 40 may be connected to the terminal 24 .

Embodiment 4.

In Embodiment 1, the body 20a of the container 20 and the container lower part 20c are connected by welding, but as shown in FIG. 9 , the trunk 20a of the container 20 and the container lower part (20c) may be integrally molded.

10: refrigeration cycle device
11: Refrigerant circuit
12 : Compressor
13: 4-way valve
14: first heat exchanger
15: inflation mechanism
16: second heat exchanger
17: control unit
20: courage
20a: body
20b: top of container
20c: bottom of container
20d: inner wall
21: suction pipe
22: discharge pipe
23 : suction muffler
24: terminal
24a: first terminal
24b: second terminal
25: refrigeration oil
26: connection line
26a: first connection line
26b: second connection line
27: ring material
28 : load
29: oil separator
30: compression mechanism
31: cylinder
32: rolling piston
33: headstock
34: support
35: discharge muffler
36: fastener
40: electric motor
41: stator
42: rotor
43: stator iron core
44: winding
45: rotor iron core
46: permanent magnet
47: connection terminal
50: crankshaft
51: eccentric shaft
52: main shaft
53: support part
54: through hole
61: cylinder chamber
62: vane home
63: back pressure chamber
64 : vane
71: pin
72: cluster
L1: straight
L2: straight
L3: straight
L4: straight
T1 : Connection terminal
T2 : Connection terminal
T3 : Connection terminal
T4 : Connection terminal
T5 : Connection terminal
T6 : Connection terminal
W1: lead wire
W2: lead wire
W3 : lead wire
W4 : lead wire
W5 : lead wire
W6: Lead wire.

Claims (6)

a compression mechanism for compressing the refrigerant;
an electric motor for driving the compression mechanism;
a container for accommodating the compression mechanism and the electric motor, the container having a cylindrical body;
a first terminal and a second terminal attached to an axial end of the container;
Guided along the inner peripheral wall of the container in plan view, guided along the curvature of the body, and electrically connecting the first terminal and the second terminal and the electric motor in the container without intersecting each other in plan view A compressor comprising a first connection line and a second connection line. According to claim 1,
Each of the first connection line and the second connection line is a plurality of lead wires, and at least one lead wire included in the first connection line and at least one lead wire included in the second connection line are the first A compressor characterized in that after being taken out in a direction closer to each other than the terminal and the second terminal, the compressor is guided in a direction away from each other along the inner peripheral wall of the container. 3. The method of claim 2,
At least one lead wire included in the first connection line is guided over the shortest straight line connecting the first terminal and the inner peripheral wall of the container in plan view. According to claim 1,
The first connecting line and the second connecting line are each a plurality of lead wires, and the plurality of lead wires are bundled with a sleeve having a length of 60% or less of the shortest lead wire among the plurality of lead wires. compressor. According to claim 1,
In order to discharge the refrigerant to the outside of the container, a discharge pipe provided at a position overlapping the central axis of the container at one end of the axial direction of the container is further provided,
The first terminal and the second terminal are attached at a position shifted from the central axis of the container at one end of the container in the axial direction,
The first connection line and the second connection line are each a plurality of lead wires, and a plurality of connection terminals connected to the electric motor are provided at the ends of the plurality of lead wires, and the first connection line and the second connection line are provided. The plurality of connection terminals of the line are arranged within a range of ±60 degrees around the center of the discharge pipe with respect to a straight line connecting the centers of the first and second terminals and the centers of the discharge pipe in plan view, respectively. Compressor characterized. A refrigeration cycle device comprising the compressor according to any one of claims 1 to 5.

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