CZ309325B6 - Compressor and refrigeration cycle equipment - Google Patents

Abstract

The compressor (12) contains a compression mechanism (30) for compressing the refrigerant, an electric motor (40) for driving the compression mechanism (30), a container (20) for storing the compression mechanism (30) and the electric motor (40), a set of terminals and a set of connecting wires ( 26). The plurality of terminals includes a first terminal (24a) and a second terminal (24b) and is attached to one axial end of the container (20). The center of each terminal of the plurality of terminals is located in plan view within an angular range (R1) of 180° or less, defined by a first straight line (L1) passing through the center (P0) of the container (20) and the center (P1) of the first terminal (24a), and the second straight line (L2), passing through the center (P0) of the container (20) and the center (P2) of the second terminal (24b). A set of connecting wires (26) for electrical connection inside the container (20) of the set of terminals and the electric motor (40) is led out from the set of terminals to an angular range (R1) in a plan view.

Description

Compressor and refrigeration cycle equipment

Field of technology

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

Current state of the art

In the hermetic type rotary compressor, which is an exemplary embodiment of the rotary compressor, the electric motor and internal components, such as the compression mechanism, are housed in an integrated hermetic container that is welded.

The outlet pipe for the coolant discharge as well as the sealing end, connected to the inner stator via a guide wire, are arranged in the upper part of the hermetic container.

One sealing end is generally arranged in the hermetic vessel of the rotary compressor.

However, the arrangement of two sealing terminals allows current to flow through the sealing terminal, while the lead wire can be shortened, while also allowing a change in the connection method of the winding electric motor.

Patent document JP 2010053786 A describes a solution in which the first guide wire is connected to the first terminal so that it is guided in a counter-clockwise direction, and the second guide wire is connected to the second terminal so that it is guided in the clockwise direction.

In the solution described in patent document JP 2010053786 A, the first and second guide wires are arranged to lead upwards from the electric motor on the side opposite to the first and second terminals with respect to the outlet pipe.

Therefore, the lengths of the first and second guide wires must be extended based on the sizes of the outlet pipe and other components arranged in the central part of the hermetic container.

The object of this invention is to shorten the length of a set of connecting wires that electrically connect a set of terminals attached to the compressor container and the electric motor stored in the compressor container.

The essence of the invention

The above task was achieved by developing a compressor according to the present invention, which includes:

a compression mechanism for compressing the coolant, an electric motor for driving the compression mechanism, a container for storing the compression mechanism and the electric motor, a set of terminals and a set of connecting wires.

The essence of the invention lies mainly in the following aspects.

- 1 CZ 309325 B6

The plurality of terminals includes a first terminal and a second terminal and is attached to one axial end of the container.

The center of each terminal of the plurality of terminals is located in plan view within an angular range of 180° or less defined by a first line passing through the center of the container and the center of the first terminal and a second line passing through the center of the container and the center of the second terminal.

A plurality of connecting wires for electrical connection inside the receptacle of the set of terminals and the electric motor are led out from the set of terminals to an angular range in a plan view.

The set of connecting wires is preferably located in an angular range in the plane of view.

According to a preferred embodiment of the present invention, the set of connecting wires includes a first connecting wire that electrically connects the first terminal and the electric motor, and a second connecting wire that electrically connects the second terminal and the electric motor.

The first connecting wire and the second connecting wire are preferably brought out in the plan view in the direction of the third straight line passing through the center of the container and the center point between the center of the first terminal and the center of the second terminal.

The compressor according to the present invention further advantageously contains:

a set of power wires connected on the outside of the container to a set of terminals, wherein the set of power wires includes a first power wire connected to the first terminal and a second power wire connected to the second terminal, and wherein at least one of the first power wire and the second power wire is brought out outward in plan view in the direction of a third straight line passing through the center of the container and the midpoint between the center of the first terminal and the center of the second terminal.

Each of the first terminal and the second terminal preferably has three pins, wherein the three pins of the first terminal and the three pins of the second terminal are located symmetrically with respect to the third straight line.

At least one connecting wire included in the set of connecting wires is preferably connected to one terminal included in the set of terminals via the group.

The compressor according to the present invention further advantageously contains:

a discharge pipe, arranged at one axial end of the container in a position that overlaps in front of the central axis of the container, for the purpose of forcing the coolant out of the container, the container comprising at one axial end of the container a curved part where the discharge pipe is located and at least one flat part, wherein the set of terminals is positioned, with at least one flat portion inclined relative to a virtual perpendicular plane that is located between the set of terminals and the electric motor and that is perpendicular to the axial direction of the vessel, at an angle of inclination that is further below the virtual perpendicular plane when the distance to the central axis of the vessel decreases along at least one direction.

The angle of inclination is preferably from 5° to 30° relative to the virtual vertical plane.

At least a portion comprising one end in a first direction that is perpendicular to an axial direction of at least one flat portion is preferably inclined with respect to a virtual perpendicular plane at a first angle

-2CZ 309325 B6 of an inclination that is further from the virtual perpendicular plane as the distance to the central axis of the vessel decreases along the first direction.

At least the portion including one end in the second direction that is perpendicular to the axial direction and the first direction of at least one flat portion is preferably inclined with respect to the virtual perpendicular plane at a second angle of inclination that is farther from the virtual perpendicular plane when the distance to the central axis of the container decreases along the other direction.

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

The set of terminals is preferably placed together in one flat part.

The plurality of terminals is preferably divided for placement in two or more flat portions.

Advantageously, the container includes at one axial end of the container a different flat part where the accessory, different from the set of terminals, is located, the different flat part having a shorter maximum distance from the virtual perpendicular plane than the maximum distance from the virtual perpendicular plane to the at least one flat part .

The compressor according to the present invention further advantageously comprises a rod to which a cap is attached for covering a set of terminals, while the container comprises a different flat part at one axial end of the container where the rod is located.

Preferably, the discharge tube is connected to the curved portion via an annular member and extends into the interior of the container at a position closer to the compression mechanism compared to the distance from the annular member to the compression mechanism.

One axial end of the container preferably has a circular shape in plan view, and the outer diameter of the discharge pipe is preferably 0.1 times or more the outer diameter of one axial end of the container.

A portion extending from the end connected to each terminal of each connecting wire of the plurality of connecting wires is preferably brought out of the existing range of each terminal at a position within the angular range in plan view.

According to this invention, a refrigeration cycle device was also developed, comprising the compressor characterized above.

In the present invention, each connecting wire that electrically connects each terminal and the electric motor is led out to an angular range of 180° or less, defined by a first straight line passing through the center of the container and the center of the first terminal, and a second straight line passing through the center of the container and the center of the second terminal , in plan view.

Therefore, the length of each connecting wire can be shortened.

Clarification of drawings

The invention will further be explained in more detail on the basis of its exemplary advantageous embodiments, the description of which will be given taking into account the attached drawings, where:

Fig. 1 shows a circuit diagram of a refrigeration cycle device according to a first embodiment;

Fig. 2 shows a circuit diagram of a refrigeration cycle device according to a first embodiment;

Fig. 3 shows a longitudinal sectional view of a compressor according to a first embodiment;

Fig. 4 shows a cross-sectional view of a compressor according to a first embodiment;

Fig. 5 shows a plan view of a part of the compressor according to the first embodiment;

Fig. 6 shows a longitudinal sectional view of a part of the compressor according to the first embodiment;

Fig. 7 is a partial longitudinal sectional view of a part of a compressor according to a first embodiment;

Fig. 8 shows a side elevational view of a part of a compressor according to a first embodiment;

Fig. 9 shows a bottom view of a part of the compressor according to the first embodiment;

Fig. 10 is a schematic view showing the method of connecting the connecting wires when assembling the compressor according to the first embodiment;

Fig. 11 is a schematic view showing the method of connecting the connecting wires when assembling the compressor according to the comparative example;

Fig. 12 shows a plan view of a part of the compressor according to the first embodiment;

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

Fig. 14 shows a graph showing the result of comparing the amount of deformation depending on the internal pressure in the upper part of the container in the compressor according to the first embodiment and in the compressor according to the comparative example;

Fig. 15 shows a plan view of a part of a compressor according to a second embodiment;

Fig. 16 shows a longitudinal sectional view of a compressor according to a third embodiment; and Fig. 17 shows a longitudinal sectional view of the compressor according to the fourth embodiment.

Examples of implementation of the invention

Embodiments of the present invention will now be further described with reference to the attached drawings.

Identical or corresponding parts are designated by the same reference numerals throughout the drawings.

The explanation of the same or equivalent components will be omitted or simplified as appropriate when describing individual embodiments.

It must be emphasized that the present invention is in no way limited to the embodiments described below, as various modifications are possible if necessary.

For example, two or more of the embodiments described below may be practically implemented in combination.

Alternatively, one embodiment or a combination of two or more embodiments from the embodiments described below may be practically implemented.

A first embodiment of the present invention will now be described with reference to Fig. 1 to Fig. 14.

-4CZ 309325 B6

The arrangement of the refrigeration cycle apparatus 10 according to this embodiment will now be described with reference to Fig. 1 and Fig. 2.

Giant. 1 shows the cooling circuit 11 of the refrigerant during the cooling operation.

Giant. 2 shows the refrigerant cooling circuit 11 during the heating operation.

In this embodiment, the cooling cycle device 10 consists of an air conditioning device.

However, the refrigeration cycle device 10 may be constituted by a device other than an air conditioning device, and this may, for example, be constituted by a refrigeration device or a heat pump cycle device.

The refrigeration cycle device 10 contains a refrigerant circuit 11 in which the refrigerant circulates.

The refrigeration cycle device 10 further includes a compressor 12.

the four-way valve 13, the first heat exchanger 14. which represents the outdoor heat exchanger, the expansion mechanism 15 which represents the expansion valve, and the second heat exchanger 16. which represents the indoor or room heat exchanger.

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 cooling circuit 11 of the coolant.

Compressor 12 compresses the refrigerant.

The four-way valve 13 switches the direction in which the refrigerant flows, so that the direction in the cooling operation is different from the direction in the heating operation.

During the cooling operation, the first heat exchanger 14 then works as a condenser to dissipate the heat of the refrigerant compressed by the compressor 12.

This means that the first heat exchanger 14 provides heat exchange using the refrigerant compressed by the compressor 12.

During the heating operation, the first heat exchanger 14 then works as a heat exchanger for heating the coolant through heat exchange between the outside air and the coolant expanded through the expansion mechanism 15.

-5CZ 309325 B6

The expansion mechanism 15 ensures the expansion of the coolant from which the heat was dissipated in the condenser.

During the heating operation, the second heat exchanger 16 then works as a condenser to dissipate the heat of the refrigerant compressed by the compressor 12.

This means that the second heat exchanger 16 provides heat exchange using the refrigerant compressed by the compressor 12.

During the cooling operation, the second heat exchanger 16 then works as a heat exchanger for heating the coolant through heat exchange between the indoor air and the coolant expanded by the expansion mechanism 15.

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

The control device 17 is designed as a microcomputer, for example.

Although only the connection between the control device 17 and the compressor 12 is shown in Fig. 1 and Fig. 2, the control device 17 can be connected not only to the compressor 12, but also to other components connected in the cooling circuit 11, a refrigerant that is different from the compressor 12.

The controller 17 monitors and controls the status of each component connected to the controller 17.

An HFC-based refrigerant such as R32, R125, R134a, R407C or R410A is used as the refrigerant that circulates in the cooling circuit 11 for cooling.

Alternatively, an HFO-based refrigerant such as R1123, R1132 (E), R1132 (Z), R1132a, R1141, R1234yf, R1234ze (E) or R1234ze (Z) is used.

Alternatively, a natural refrigerant such as R290 (propane), R600a (isobutane), R744 (carbon dioxide) or R717 (ammonia) is used.

Alternatively, a mixture of two or more types of the above refrigerants is used ("HFC" stands for hydrofluorocarbon; "HFO" stands for hydrofluoroolefin).

The compression arrangement 12 according to this embodiment will be described with reference to Fig. 3.

Giant. 3 shows a longitudinal cross-sectional view of the compressor 12.

In this embodiment, the compressor 12 is a hermetic type compressor.

The compressor 12 is particularly designed as a multi-cylinder rotary compressor.

However, the compressor 12 may also be designed as a single-cylinder rotary compressor, a scroll compressor, or a reciprocating piston compressor.

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

-6CZ 309325 B6

The container 20 is particularly designed as a hermetic container.

The cooling machine oil 25 is stored in the lower part of the container 20.

The suction pipe 21 for sucking the refrigerant into the container 20 and the discharge pipe 22 for pushing the refrigerant out of the container 20 are attached to the container 20.

The electric motor 40 is stored in the container 20.

The electric motor 40 is mainly located in the upper section inside the container 20.

In this embodiment, the electric motor 40 is formed as a concentrated winding motor.

However, electric motor 40 may be constructed as a distributed winding motor.

The compression mechanism 30 is stored in the container 20.

The compression mechanism 30 is particularly located in the lower section inside the container 20.

This means that the compression mechanism 30 is located below the electric motor 40 in the container 20.

The crankshaft 50 connects the electric motor 40 and the compression mechanism 30 to each other.

The crankshaft 50 forms an oil path for supplying the cooling machine oil 25 and forms the rotating shaft of the electric motor 40 .

Along with the rotation of the crankshaft 50 , the cooling engine oil 25 is pumped through an oil supply mechanism such as an oil pump arranged in the lower portion of the crankshaft 50 .

Then, the cooling engine oil 25 is supplied to each sliding section of the compression mechanism 30 to lubricate each sliding section of the compression mechanism 30.

As the cooling machine oil 25, POE, PVE, AB, or the like, each of which is a synthetic oil ("POE" stands for polyolester; "PVE" stands for polyvinyl ether; "AB" stands for alkylbenzene) can be used.

The electric motor 40 ensures the rotation of the crankshaft 50.

The compression mechanism 30 is driven through the rotation of the crankshaft 50, and consequently compresses the refrigerant.

That is, the compression mechanism 30 is driven by the rotational force of the electric motor 40, transmitted through the crankshaft 50, thereby compressing the refrigerant.

The coolant is mainly a low-pressure gas coolant sucked into the suction pipe 21.

The high-temperature and high-pressure gas refrigerant, which is compressed by the compression mechanism 30 , is pushed into the space inside the container 20 from the compression mechanism 30 .

The crankshaft 50 includes an eccentric section 51 of the crankshaft 50,

-7 CZ 309325 B6 the main section 52 of the crankshaft 50 and the secondary section 53 of the crankshaft 50.

These components are arranged in the axial direction DO in the following order: the main section 52 of the crankshaft 50, the eccentric section 51 of the crankshaft 50 and the secondary section 53 of the crankshaft 50.

That is, the main section 52 of the crankshaft 50 is arranged on one axial end side of the eccentric section 51 of the crankshaft 50 and the sub section 53 of the crankshaft 50 is arranged on the other axial end side of the eccentric section 51 of the crankshaft 50.

Each of the sections, i.e.

the eccentric section 51 of the crankshaft 50, the main section 52 of the crankshaft 50 and the secondary section 53 of the crankshaft 50 have a cylindrical shape.

The main section 52 of the crankshaft 50 and the secondary section 53 of the crankshaft 50 are arranged so that the center axes of these components are mutually consistent, that is, the main section 52 of the crankshaft 50 and the secondary section 53 of the crankshaft 50 are arranged coaxially.

The eccentric section 51 of the crankshaft 50 is arranged so that the center axis of the eccentric section 51 of the crankshaft 50 is not aligned with the center axes of the main section 52 of the crankshaft 50 and the sub section 53 of the crankshaft 50.

When the main section 52 of the crankshaft 50 and the sub section 53 of the crankshaft 50 rotate about their respective central axes, the eccentric section 51 of the crankshaft 50 rotates eccentrically.

Container 20 will now be described in more detail.

The container 20 includes a body part 30a of the container 20, an upper part 20b of the container 20, and a lower part 20c of the container 20.

The body part 20a of the container 20 has a cylindrical shape.

The upper part 20b of the container 20 closes the opening on the upper side of the body part 20a of the container 20.

The upper part 20b of the container 20 corresponds to one axial end of the container 20.

The lower part 20c of the container 20 closes the opening on the lower side of the body part 20a of the container 20.

-8CZ 309325 B6

The lower part 20c of the container 20 corresponds to the second axial end of the container 20.

The body part 20a of the container 20 and the upper part 20b of the container 20 are connected to each other by welding, and the body part 20a of the container 20 and the lower part 20c of the container 20 are connected to each other by welding, so that the container 20 is thus sealed.

The suction pipe 21, connected to the suction damper 23, is arranged in the body part 20a of the container 20.

The discharge pipe 22 is arranged on the upper part 20b of the container 20.

More detailed details of the electric motor 40 will now be described further.

In this embodiment, the electric motor 40 is designed as a brushless direct current (DC) motor.

However, the electric motor 40 may be formed as an electric motor other than a brushless DC motor, such as an induction electric motor ("DC" stands for direct current).

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

The stator 41 has a cylindrical shape and is fixed to be in contact with the inner peripheral surface of the container 20.

The rotor 42 has a columnar shape and is located inside the stator 41 so that there is a gap between the rotor 42 and the stator 41.

The width of this gap is, for example, from 0.3 mm to 1.0 mm.

The stator 41 includes the stator core 43 of the stator 41 and the winding 44 of the stator 41.

The stator core 43 of the stator 41 is made by punching or punching a plurality of electromagnetic steel plates, each of which contains iron as a main component, into a certain shape, stacking the punched electromagnetic steel plates in the axial direction DO, and fixing the stacked electromagnetic steel plates by theming.

The thickness of each sheet of electromagnetic steel is, for example, from 0.1 mm to 1.5 mm.

The stator core 43 of the stator has an outer diameter that is larger than the inner diameter of the body part 20a of the container 20, and is fixed inside the body part 20a of the container 20 by means of a hot fit fit.

The winding 44 is wound around the stator core 43 of the stator 41.

-9CZ 309325 B6

In particular, the winding 44 is wound around the stator core 43 of the stator 41 through an insulating member by means of a concentrated winding.

Winding 44 is formed from a core wire and at least one layer of coating covering the core wire.

In this embodiment, the core wire is formed from copper.

The coating is formed from AI/EI ("AI" stands for amide-imide; "El" stands for ester-imide).

The insulating member is made of PET ("PET" stands for polyethylene terephthalate).

It should be emphasized that the method of attaching the stator core plates 43 and the stator 41 of the electromagnetic steel to each other is not limited only to threading, as various methods such as welding can be used.

The method of fixing the stator core 43 of the stator 41 inside the body part 20a of the container 20 is not limited to hot fitting, as various other methods such as press fitting or welding may also be used.

The winding core wire 44 may be formed of aluminum.

The insulating member can be made of PBT, FEP, PFA, PTFE, LCB, PPS, or phenolic resin ("PBT" stands for Polybutylene Terephthalate; "FEP" stands for Fluorinated Ethylene Propylene; "PFA" stands for PerfluoroAlkoxyalkane; "PTFE" stands for " stands for Polytetrafluoroethylene; "LCP" stands for Liquid Crystal Polymer; and "PPS" stands for Polyphenylene Sulfide).

The rotor 42 includes the rotor core 45 of the rotor 42 and the permanent magnets 46.

Similar to the case of the stator core 43 of the stator 41, the rotor core 45 of the rotor 42 is also made by punching or punching a plurality of electromagnetic steel plates, each of which contains iron as a main component, into a certain shape, stacking the punched electromagnetic steel plates in the axial direction DO and attaching the laminated electromagnetic steel plates through theming.

The thickness of each of the electromagnetic steel plates is, for example, from 0.1 mm to 1.5 mm.

Each permanent magnet is stored in a corresponding one hole from a set of storage holes formed in the rotor core 45 of the rotor 42.

Each permanent magnet 46 creates a magnetic field.

A ferrite magnet or a rare earth magnet is used as each of the permanent magnets 46.

-10 CZ 309325 B6

It should be emphasized that the method of mutually attaching the rotor core plates 45 of the electromagnetic steel rotor 42 to each other is not limited to butting, as various other methods such as welding may be used.

A shaft hole, into which the main section 52 of the crankshaft 50 is fixed by means of a hot fit fit or by means of pressing, is formed in the center of the rotor core 45 of the rotor 42 in a plan view.

That is, the rotor core 45 of the rotor 42 has an inner diameter that is smaller than the outer diameter of the main section 52 of the crankshaft 50 .

Although not shown, a set of through holes passing in the axial direction DO. is formed around the shaft hole in the rotor core 45 of the rotor 42.

Each through-hole serves as one path for the gaseous coolant, coming from the exhaust muffler 35, which will be described later, into the space inside the container 20.

Each through hole also serves as one of the channels to allow the cooling machine oil 25 fed to the upper part of the container 20 to fall down into the lower part of the container 20.

Although not shown, if the electric motor 40 is formed as an induction electric motor, each of the conductors formed from aluminum, copper or the like fills or is inserted into a corresponding one of the grooves formed in the rotor core 45 of the rotor 42.

A lap winding is then formed, with each of the two ends of the wires being short-circuited using end rings.

Then, in the upper part 20b of the container, a terminal 24 connected to an external power source such as an inverter device is arranged, and a rod 28 to which a cap for protecting the terminal 24 is attached is also arranged.

The tip 24 is, for example, a sealing tip, such as a glass tip.

In this embodiment, the end cap 24 is attached to the container 20 by welding.

A connecting wire 26 extending from the winding 44 of the electric motor 40 is connected to the terminal 24 for the electrical connection of the terminal 24 and the electric motor 40.

The discharge pipe 22, both axial ends of which are open, is further attached to the upper section 20b of the container 20.

The gaseous refrigerant, extruded from the compression mechanism 30, passes through the rotor 42 and then through the oil separator 29 above the rotor 42, and is discharged from the space inside the container 20 through the discharge pipe 22 into the refrigerant cooling circuit 11, which is on the outside of the container 20.

The oil separator 29 separates the cooling machine oil 25 in the container 20, which is pumped together with the coolant.

The oil separator 29 is attached to the crankshaft 50 by pressing, while rotating together with the rotating crankshaft 50.

Alternatively, the oil separator 29 is attached to the rotor 49 using a fastening means such as a rivet, rotating at high speed together with the rotation of the rotor 42.

Refrigeration machine oil 25 has a higher specific gravity than the coolant.

-11 CZ 309325 B6

Therefore, the oil separator 29 can separate the cooling engine oil 25 by blowing the cooling engine oil 25 in the circumferential direction using centrifugal force.

The discharge pipe 22 may be located on the outer periphery of the upper part 20b of the container 20.

In this embodiment, however, the discharge pipe 22 is located directly above the crankshaft and in the central section of the upper part 20b of the container 20.

If the discharge pipe 22 is located on the outer periphery of the upper part 20b of the container 20, the cooling machine oil 25 separated by the oil separator 29 can enter the discharge pipe 22 and be discharged out of the container 20, as a result of which the amount of the cooling machine oil 25 in the container 20 decreases, which may cause deterioration of the lubrication of the compression mechanism 30.

In order to prevent such deterioration of lubrication, it is desirable that the discharge tube 22 be located in the center section of the upper portion 20b of the container 20.

The details of the compression mechanism 30 will now be described in more detail, not only with reference to Fig. 3, but also with reference to Fig. 4.

Giant. 4 shows a cross-sectional view of a part of the compressor 12, viewed in the axial direction DO.

It should be emphasized that the cross-hatching, indicating the section, is omitted in Fig. 4.

The compression mechanism 30 includes a cylinder 31.

rolling piston 32, main bearing 33, secondary bearing 34 and damper 35 of displacement.

The inner circumference of the cylinder 31 has a circular shape in plan view.

A cylindrical chamber 61, which represents a space having a circular shape in plan view, is formed inside the cylinder 31.

Suction hole for sucking gaseous coolant from the cooling circuit 11 of the coolant arranged on the outer peripheral surface of the cylinder 31.

The refrigerant that has been drawn in through the inlet is compressed in the cylindrical chamber 61.

Both axial ends of cylinder 31 are open.

The rolling piston 32 has an annular shape.

Therefore, each inner circumference and outer circumference of the rolling piston 32 has a circular shape in plan view.

The rolling piston 32 rotates eccentrically in the cylindrical chamber 61.

-12 CZ 309325 B6

The rolling piston 32 is slidably attached to the eccentric section 51 of the crankshaft 50, which serves as the rotating shaft of the rolling piston 32.

The cylinder 31 is provided with a blade groove 62 which is connected to the cylindrical chamber 61 and which runs in the radial direction.

A back pressure chamber 63, which is a space that has a circular shape in plan view and is connected to the blade groove 62, is formed on the outer side of the blade groove 62.

A vane 64 for dividing the cylindrical chamber 61 into a suction chamber, which represents a low-pressure working chamber, and a compression chamber, which represents a high-pressure working chamber, is located in a vane groove 62.

The blade 64 has a plate-like shape with a rounded top.

The vane 64 moves in a rectilinear reciprocating motion as it slides in the vane groove 62.

The vane 64 is constantly pressed against the rolling piston 32 through the action of the vane spring arranged in the back pressure chamber 63.

Since the pressure inside the container 20 is high, the force generated due to the pressure difference between the pressure inside the container 20 and the pressure inside the cylindrical chamber 61 acts on the back surface of the blade which is the surface of the blade 64 on the side of the back pressure chamber 63 when the operation of the compressor 12 is started

Therefore, the vane spring is mainly used for the purpose of pressing the vane 64 on the roll-off piston 32. especially at the start of operation of the compressor 12, when there is no pressure difference between the pressure inside the container 20 and the pressure inside the cylindrical chamber 6L

The main bearing 33 has the shape of an inverted T in side view.

The main bearing 33 is slidably attached to the main section 52 of the crankshaft 50, which is the part above the eccentric section 51 of the crankshaft 50.

A through hole 54, which serves as an oil supply path e, is formed inside the crankshaft 50 in the axial direction DO.

An oil film is formed between the main bearing 33 and the main section 52 of the crankshaft 50 by supplying cooling engine oil 25 pumped through this through hole 54.

The main bearing 33 closes the upper side of the cylinder chamber 61 of the cylinder 31 and the upper side of the vane groove 62 of the cylinder 31.

This means that the main bearing 33 closes the upper sides of the two working chambers in the cylinder 31.

The side bearing 34 is T-shaped in side view.

The side bearing 34 is slidably attached to the side section 53 of the crankshaft 50. which is the part below the eccentric section 51 of the crankshaft 50.

An oil film is formed between the secondary bearing 34 and the secondary section 53 of the crankshaft 50 by supplying cooling engine oil 25 pumped through the through hole 54 of the crankshaft 50 .

-13 CZ 309325 B6

The side bearing 34 closes the lower side of the cylinder chamber 61 of the cylinder 31 and the lower side of the blade groove 62 of the cylinder 31.

This means that the secondary 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 attached to the cylinder 31 by a fastening means 36 such as a screw, while supporting the crankshaft 50, which serves as the rotary shaft of the rolling piston 32.

The main bearing 33 supports the main section 52 of the crankshaft 50 without contacting the main section 52 of the crankshaft 50, using fluid lubrication with an oil film between the main bearing 33 and the main section 52 of the crankshaft 50.

Similar to the case of the main bearing 33, the secondary bearing 34 also supports the secondary section 53 of the crankshaft 50, without contacting the secondary section 53 of the crankshaft 50, using fluid lubrication with an oil film between the secondary bearing 34 and the secondary section 53 of the crankshaft 50.

Although it is not shown, the main bearing 33 is provided with a discharge hole for extruding the coolant, compressed in the cylindrical chamber 61, into the cooling circuit 11 of the coolant.

The discharge port is located in a position in which the discharge port is connected to the compression chamber, when the cylindrical chamber 61 is divided into a suction chamber and a compression chamber by means of a vane 64.

The discharge valve for closing the discharge hole is attached to the main bearing 33 so that the discharge valve enables opening and closing of the discharge hole.

The discharge valve closes when the gaseous refrigerant in the compression chamber reaches the desired pressure, and opens when the gaseous refrigerant in the compression chamber reaches the desired pressure.

By means of this arrangement, the timing at which the gaseous refrigerant is forced out of the cylinder 31 is regulated.

The displacement damper 35 is attached to the outside of the main bearing 33.

The high-temperature, high-pressure refrigerant gas that is expelled when the discharge valve opens first temporarily enters the discharge damper 35 , and then is expelled from the discharge damper 35 into the space in the container 20 .

It should be emphasized that the discharge hole and the discharge valve can be arranged on the secondary bearing 34, or they can be arranged on both the main bearing 33 and the secondary bearing 34.

The discharge damper 35 is attached to the outside of the bearing, where the discharge hole and the discharge valve are arranged.

The suction damper 23 is arranged next to the container 20.

The suction damper 23 sucks the low-pressure gaseous coolant from the coolant circuit 11.

The suction damper 23 suppresses the direct entry of the liquid refrigerant into the cylinder chamber 61 of the cylinder 31 when the liquid refrigerant returns.

The suction damper 23 is connected to the suction hole arranged on the outer peripheral surface of the cylinder 31 through the suction pipe 21.

-14 CZ 309325 B6

The suction port is placed in a position where the suction port is connected to the suction chamber when the cylindrical chamber 61 is partitioned to the suction chamber and to the compression chamber via the vane 64.

The main body of the suction damper 23 is attached to the side surface of the body part 20a of the container 20 by welding or the like.

The eccentric section 51 of the crankshaft 50, the main section 52 of the crankshaft 50 and the secondary section 53 of the crankshaft 50 are made of cast iron or forged material.

The main bearing 33 and the secondary bearing 34 are made of cast iron or sintered material.

In particular, the main bearing 33 and the secondary bearing 34 are made of sintered steel, gray cast iron or carbon steel.

The cylinder 31 is also made of sintered steel, gray cast iron or carbon steel.

The rolling piston 32 is made of cast iron.

The rolling piston 32 is mainly made of a steel alloy containing molybdenum, nickel and chromium, or of an iron-based cast iron.

Blade 64 is formed from high speed tool steel.

Although not shown, when the compressor 12 is formed as a reciprocating type rotary compressor, the vane 64 is formed integrally with the rolling piston 32.

When the crankshaft 50 is driven, the vane 64 extends outward and retracts inward, i.e. performs a rectilinear reciprocating movement along a groove in the support body pivotally attached to the roll piston 32.

The vane 64 moves forward and backward in the radial direction during the oscillating movement, together with the rotation of the rolling piston 32, partitioning the inner space of the cylindrical chamber 61 into a compression chamber and a suction chamber.

The support body is formed from two column-shaped members, each of which has a semi-circular cross-section.

The support body is rotatably fixed in a circular storage hole, formed in the intermediate section between the suction hole and the discharge hole of the cylinder 31.

The functions and operation of the compressor 12, which represents the device according to this embodiment, will now be further described with reference to Fig. 3 and Fig. 4.

The function and operation of the compressor 12 correspond to the method of compressing the refrigerant according to this embodiment.

Power is supplied from terminal 24 to stator 41 of electric motor 40 via lead wires.

This causes a current to flow through the winding 44 of the stator 41, and a magnetic flux is created around the winding 44.

-15 CZ 309325 B6

The rotor 42 of the electric motor 40 rotates due to the action of the magnetic flux created in the winding 44 and the magnetic flux created by the action of the permanent magnets of the rotor 42.

In particular, the rotor 42 rotates through the attractive and repulsive action between the rotating magnetic field, which is generated due to the passage of current through the winding 44 of the stator 41, and the magnetic field of the permanent magnets of the rotor 42.

The rotation of the rotor 42 also causes the crankshaft 50, which is attached to the rotor 42, to rotate.

Together with the rotation of the crankshaft 50, the rolling piston 32 of the compression mechanism 30 rotates eccentrically in the cylinder chamber 61 in the cylinder 31 of the compression mechanism 30.

The cylinder chamber 61, which represents the space between the cylinder 31 and the rolling piston 32, is divided into a suction chamber and a compression chamber by means of a vane 64.

Together with the rotation of the crankshaft 50, the volumes of the intake chamber and the compression chamber change.

In the suction chamber, the gradual increase in volume causes the low-pressure gaseous refrigerant to be sucked in from the suction damper 23 through the suction pipe 21.

In the compression chamber, the gradual reduction in volume causes the gaseous refrigerant inside to be compressed.

Compressed gaseous refrigerant, the pressure and temperature of which is high, is forced out of the discharge damper 35 into the space in the container 20.

The extruded gaseous refrigerant further passes through the electric motor 40 and is extruded from the discharge pipe 22 on the upper part 20b of the container 20 to the outside of the container 20.

The coolant, pushed to the outside of the container 20, passes through the coolant circuit 11 and returns to the suction damper 23.

The arrangement of the compressor 12 according to this embodiment will now be described in more detail with reference to Fig. 3 and also with reference to Figs. 5 to 13.

Giant. 5 shows the upper surface of the compressor part 12 as viewed in the axial direction DO.

Giant. 6 shows a cross-sectional view of a portion of the compressor 12 viewed in the first direction D1. which is perpendicular to the axial direction DO.

Giant. 7 shows a front view and a cross-sectional view of a part of the compressor 12 as viewed in the second direction D2, which is perpendicular to the axial direction DO and the first direction D1.

Giant. 8 shows a side view of a portion of the compressor 12 as viewed in the first direction D1.

It should be emphasized that terminal 24 is omitted in Fig. 8.

The upper part 20b of the container 20, connected to the body part 20a of the container 20, has a circular shape in plan view.

The discharge pipe 22 is arranged in the central section of the upper part 20b of the container 20,

The first flat portion 81, the second flat portion 82, and the curved portion 83 are formed on the surface of the upper portion 20b of the container 20.

-16 CZ 309325 B6

A plurality of terminals 24 are arranged on the first flat portion 81.

Each terminal 24 is electrically connected to an electric motor 40 in the container 20.

Each terminal 24 is fixed in a respective one of the through holes formed in the first flat part 81.

The outer circumference of each terminal 24 is in contact with the inner circumference of the corresponding one of the through holes.

A rod 28, perpendicular to the second flat portion 82, is arranged on the second flat portion 82.

It is desirable that the outer diameter of the discharge pipe 22 located in the central section of the upper part 20b of the container 20 is 0.1 times or more the outer diameter of the upper part 20b of the container 20.

It is desirable that the outer diameter of the discharge tube 22 is 0.2 times or less than the outer diameter of the upper part 20b of the container 20.

The surface of the curved portion 83 is formed from a plurality of curved surfaces.

The curved portion 83 has a shape that approximates a hemisphere with a certain portion missing.

The edges of the first flat portion 81 and the second flat portion 82 are connected to the curved portion 83 through a recessed portion 84 that is smoothly curved.

That is, the portion between the first flat portion 81 and the curved portion 83 and between the second flat portion 82 and the curved portion 83 is recessed.

The recessed portion 84 is formed as a strong portion, having a rib function to improve strength.

The first flat portion 81 is inclined relative to the virtual perpendicular plane at a first inclination angle Θ1 in the direction away from the virtual perpendicular plane.

A virtual perpendicular plane is defined at the upper end or upper opening of the body part 20a. having a cylindrical shape, and is perpendicular to the axial direction DO.

The first inclination angle 01 preferably has a size of 5° to 30°, while in this embodiment it has a size of 5°.

The end portion 81a at one end of the first flat portion 81 protrudes outward compared to the curved portion 83.

The distance from the end portion 81a at one end of the first flat portion 81 to the virtual perpendicular plane is longer than the distance from the end portion 81b at the other end of the first flat portion 81 to the virtual perpendicular plane.

The first flat portion 81 inclined at the first inclination angle Θ1 is connected to the curved portion 83 through the recessed portion 84, as a result of which the distance along the shape of the upper portion 20b of the container 20 between the outer periphery of the terminal 24 and the outer peripheral wall of the discharge tube is increased 22 and the distance along the shape of the upper part 20b of the container 20 between the outer circumference of the end piece 24 and the inner peripheral wall of the upper part 20b of the container 20.

As already described above, the first flat part 81 is inclined with respect to the virtual perpendicular plane.

- 17 CZ 309325 B6

The first flat portion is smoothly connected to the curved portion 83 through the recessed portion 84.

Therefore, even though the distance between the end piece 24 and the discharge pipe remains the same in the plan view, the distance along the shape of the upper part 20b of the container 20 between the outer circumference of the end piece 24 and the outer peripheral wall of the discharge pipe 22, and the distance along the shape of the upper part 20b of the container 20 between the outer circumference of the terminal 24 and the inner circumferential wall of the upper part 20b of the container 20 are extended.

By increasing the first inclination angle Θ1 of the first flat portion 81, then the end portion 81a at one end of the first flat portion 81 lies further from the curved portion 83, and the end portion 81a at one end of the first flat portion 81 protrudes compared to the curved portion 83, thereby increasing distance to the virtual perpendicular plane.

Therefore, the distance along the surface of the upper part 20b of the container 20 from the end piece 24 to the discharge tube 22 is further extended.

It is assumed that in the plan view the diameter of the upper part 20b of the container 20 is 100 mm, the distance between the outer circumference of the end piece 24 and the outer peripheral wall of the discharge tube 22 is less than 3 mm, and the distance between the outer circumference of the end piece 24 and the inner peripheral wall of the upper part 20b of the container 20 is less than 5 mm.

In this case, if the first flat part 81 is not inclined, then the distance between the outer circumference of the end piece 24 and the outer peripheral wall of the discharge tube 22 and the distance between the outer circumference of the end piece 24 and the inner peripheral wall of the upper part 20b of the container 20 cannot be sufficiently secured.

This means that an implementation based on distance rules cannot be created.

If the first flat portion 81 is inclined at the first inclination angle Θ1, then a distance of 3 mm or more can be ensured between the outer periphery of the terminal 24 and the outer peripheral wall of the discharge pipe 22, and a distance of 5 mm or more can be ensured between the outer periphery the ends 24 and the inner peripheral wall of the upper part 20b of the container 20.

This means that an implementation based on distance rules can be created.

If the first angle Θ1 of the inclination of the first flat part 81 is in the range of 5° to 30° with respect to the virtual perpendicular plane, then the distance between the outer circumference of the terminal 24 and the outer peripheral wall of the discharge pipe 22 and the distance between the outer circumference of the terminal 24 and the inner peripheral wall of the upper part 20b of container 20

-18 CZ 309325 B6 are secured.

As already described above, the discharge pipe 22 is arranged in such a position that it overlaps with the central axis of the container 20 at one axial end of the container 20.

The container 20 has a curved portion 83 at one axial end of the container 20 where the discharge tube 22 is located and a first flat portion 81 where the set of terminals 24 is located.

The first flat portion 81 is inclined with respect to a virtual perpendicular plane that is located between the set of terminals 24 and the electric motor 40 and that is perpendicular to the axial direction DO, at an angle of inclination that is farther from the virtual perpendicular plane when the distance to the central axis of the container 20 decreases along at least one direction.

In this embodiment, the first flat portion 81 is inclined with respect to the virtual perpendicular plane at an angle of inclination that is further from the virtual perpendicular plane as the distance to the center axis of the container 20 decreases along the two directions.

In particular, at least a portion including one end in the first direction D1 that is perpendicular to the axial direction DO of the first flat portion 81 is inclined with respect to the virtual perpendicular plane at a first inclination angle Θ1 that is farther from the virtual perpendicular plane when the distance to the center axis of the vessel 20 decreases along the first direction D1.

In this embodiment, the entire first flat portion 81 is inclined at a first inclination angle Θ1 with respect to a virtual perpendicular plane along the first direction D1.

This achieves that the part of the first flat part 81. containing one end in the first direction Dl. is further separated from the virtual perpendicular plane as the distance to the center axis of the vessel 20 decreases along the first direction DL

The remaining portion, including the second end in the first direction D1, of the first flat portion 81 is further separated from the virtual perpendicular plane as the distance to the center axis of the container 20 increases along the first direction D1.

As already described above, the first inclination angle Θ1 is preferably from 5° to 30°, and in this embodiment it is 5°.

At least the portion including one end in the second direction D2 that is perpendicular to the axial direction DO and the first direction D1 of the first flat portion 81 is inclined at a second angle of inclination that is farther from the virtual perpendicular plane when the distance to the center axis of the container 20 decreases along the second direction D2.

In this embodiment, the entire first flat portion 81 is inclined with respect to the virtual perpendicular plane at a second inclination angle Θ2 along the second direction D2.

This causes a portion of the first flat portion 81 including one end in the second direction D2 to be further separated from the virtual perpendicular plane as the distance to the center axis of the container 20 decreases along the second direction D2.

The remaining portion including the second end in the second direction D2 of the first flat portion 81 is further separated from the virtual perpendicular plane as the distance to the center axis of the vessel 20 increases along the second direction D2.

-19 CZ 309325 B6

When the length dimension of the first flat part 81 in the first direction D1 is different from the length dimension of the first flat part 81 in the second direction D2. so it is desirable that the second angle Θ2 of inclination be different from the first angle Θ1 of inclination.

That is, if the distance from one end to the other end of the first flat portion 81 in the second direction D2 is greater than the distance from one end to the other end of the first flat portion 81 in the first direction D1, then it is desirable that the second inclination angle Θ2 be smaller than the first inclination angle Θ1.

If the distance from one end to the other end of the first flat portion 81 in the second direction D2 is smaller than the distance from one end to the other end of the first flat portion 81 in the first direction D1, then it is desirable that the second inclination angle Θ2 be greater than the first angle Θ1 inclination.

This is because the steeper the slope, the shorter the distance required to reach the height.

If height can be achieved then distance and area can be secured much more easily.

The second angle Θ2 of inclination preferably has a size of from 5° to 30°, while in this embodiment it has a size of 10°.

It should be emphasized that at least one first angle Θ1 of inclination and second angle Θ2 of inclination of the first flat part 81 may be different for each area where the terminal 24 is located.

This means that the angle of inclination of the first flat part 81 can be different for each terminal 24.

When the refrigerant compressed in the compression mechanism 30 is pushed into the space inside the container 20, an outward force is exerted on the container 20 by the high-temperature, high-pressure gaseous refrigerant.

For the body part 20a, then, the cylindrical shape of the body part 20a allows stress concentration due to the external force to be reduced.

In the case of the lower part 20c of the container 20, the hemispherical or dome-shaped shape of the lower part 20c of the container 20 enables the stress concentration due to the external force to be reduced.

At the upper portion 20b of the container 20, the first flat portion 81 is inclined, and the end portion 81a at one end of the first flat portion 81 protrudes outward compared to the curved portion 83 and extends to a position higher than the center of the upper portion 20b of the container 20.

The first flat portion 81 and the curved portion 83 are connected by a recessed portion 84 that is smoothly curved.

Therefore, the distance between each of the plurality of terminals 24 arranged on the first flat portion 81 and the discharge pipe 22 arranged in the center of the upper part 20b of the container 20 is increased compared to the case where the surface of the upper part 20b of the container 20 is flat, and to the case , when the surface of the upper part 20b of the container 20 is hemispherical.

The recessed part 84 is formed as a thick part, having the function of a rib.

Therefore, even when the pressure in the container 20 increases, the stress does not tend to concentrate, so that deformation of the upper part 20b of the container 20 is prevented.

That is, for the upper portion 20b of the container 20, the first flat portion 81 is flat, the curved portion 83 approximately approximates the hemispherical shape of the missing portion, and the recessed portion 84, connecting the first

-20 CZ 309325 B6 the flat part 81 and the curved part 83. is formed as a thick part and is smoothly curved, so that the stress concentration due to the external force can be reduced.

In this embodiment, one axial end of the container 20 has a circular shape in plan view.

The outer diameter of the discharge tube 22 is 0.1 times or more the outer diameter of one axial end of the container 20.

The first flat part 81 is inclined, and the distance between each of the end pieces 24 arranged on the first flat part 81 and the discharge pipe 22 arranged on the curved part 83 is lengthened.

Therefore, even when the discharge tube 22 having a large outer diameter that is 0.1 times or more of the outer diameter of the upper part 20b of the container 20 is used, each of the ends 24 and the discharge tube 22 can be placed in sufficiently separated state from each other.

A rod 28 to which a cap for covering the terminals 24 is attached may be placed on the first flat portion 81.

In this embodiment, however, the rod 28 is located on the second flat portion 82.

The bar 28 extends to a position higher than the curved portion 83 of the upper portion 20b of the container 20.

Therefore, the placement and attachment of the ends 24 and the rod 28 can be easily performed.

The work of attaching the cap to the rod 28 can also be easily performed.

An accessory such as a temperature sensor may be attached to the second flat portion 82 .

In this embodiment, the second flat portion 82 is lower than the upper region of the first flat portion 81 by only a distance HL

Therefore, if the temperature sensor is attached to the second flat portion 82, the temperature sensor can be positioned in the vicinity of the compression mechanism 30.

The closer the temperature sensor is to the compression mechanism 30, the faster the temperature change of the refrigerant expelled from the compression mechanism 30 can be detected, even when the circulation rate of the refrigerant flow is low.

As already described above, the container 20 has at one axial end of the container 20 a second flat part 82 where the rod 28 is located,

A cap for covering the set of terminals 24 is attached to the rod 28.

The second flat portion 82 may be inclined with respect to the virtual perpendicular plane.

In this embodiment, however, the second flat portion 82 is parallel to the virtual perpendicular plane.

Rod 28 is arranged perpendicular to second flat portion 82.

That is, the rod 28 is arranged to extend along the axial direction DO.

An accessory other than the set of terminals 24 and rod 28 may be placed on the second flat portion 82.

-21 CZ 309325 B6

If an accessory such as a temperature sensor is located on the second flat portion 82, it is desirable that the second flat portion 82 has a shorter maximum distance from the virtual perpendicular plane than the first flat portion 81.

In this embodiment, resistance welding is used as a method for attaching the discharge pipe 22 to the upper part 20b of the container 20.

As shown in Fig. 3, the discharge pipe 22 is connected to the curved portion 83 through an annular member 85.

Annular member 85 is formed of iron.

By attaching the annular member 85 to the discharge tube 22 and by pressing the inclined portion of the annular member 85 against the upper portion 20b of the container 20, the upper portion 20b of the container 20 is in contact with the entire circumference of the annular portion without any gaps, so that weldability is improved.

The discharge tube 22 extends inside the container 20 to a position closer to the compression mechanism 30 compared to the annular member 85.

By making the discharge pipe 22 protrude toward the compression mechanism 30 relative to the annular member 85 , the cooling machine oil 25 trapped in the inclined portion of the annular member 85 can be prevented from entering the discharge pipe 22 .

It should be emphasized that the method of attaching the discharge pipe 22 to the upper part 20b of the container 20 is not limited to resistance welding, as another method can be used, such as gas welding with the use of soldering material or laser welding.

However, gas welding causes a large heat input and a wide range of heat input.

Therefore, if the discharge pipe 22 is attached by gas welding and then the set of terminals 24 is attached by resistance welding, deformations may occur on the surface area of the portions of the upper part 20b of the container 20 where the terminals 24 are attached.

If deformations occur, the surface surface of the upper part 20b of the container 20 and the surface surface of the ends 24 do not come into contact with each other, so that a welding error may occur during resistance welding.

It is therefore desirable to focus on reducing the amount of heat input and narrowing the range of heat input through the use of resistance welding or laser welding also when welding the discharge pipe 22.

Giant. 9 shows the bottom surface of the compressor component 12 as viewed from inside the container 20 along the axial direction DO.

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

It should be emphasized that the set of terminals 24 may include a terminal 24 that is different from the first terminal 24a and the second terminal 24b.

-22 CZ 309325 B6

A plurality of terminals 24 are attached to one axial end of the container 20 such that, in plan view, the center of each terminal 24 is located within an angular range R1 of 180° or less, defined by a first straight line L1 passing through the center PO of the container 20 and the center PI of the first terminal 24a, and the second line L2. passing through the center PO of the container 20 and the center P2 of the second terminal 24b.

In this embodiment, the set of terminals 24 is located and together in the first flat part 81 of the upper part 20b of the container 20.

A set of connecting wires 26 electrically connects the set of terminals 24 and the electric motor 40 inside the container 20.

The plurality of connecting wires 26 includes a first connecting wire 26a. which electrically connects the first terminal 24a and the electric motor 40, and the second connecting wire 26b which electrically connects the second terminal 24b and the electric motor.

It should be emphasized that when the set of terminals 24 includes a terminal 24 different from the first terminal 24a and the second terminal 24b, then the set of connecting wires 26 may include another connecting wire 26 that electrically connects the respective different terminal 24 and the electric motor 40.

A plurality of connecting wires 26 are led out from the plurality of terminals 24 to an angular range R1 in plan view.

In particular, the portion extending from the end connected to each terminal 24 of each connecting wire 26 is brought out of the existing range R2 of each terminal 24 at a position within the angular range R1 in the plan view.

The existing range R2 of each terminal 24 represents the area surrounded by the contour formed by the outer circumference of each terminal 24 in plan view.

The existing range R2 of each terminal 24 may represent an area or area of any shape.

In this embodiment, the existing range R2 represents a circular area.

The position at which a certain connecting wire 26 extending from its end connected to a certain terminal 24 crosses the boundary of the existing range R2 of the given terminal 24 in plan view represents the position where the connecting wire 26 is brought out.

In this embodiment, the set of connecting wires 26 is guided so that this position falls within the angular range R1 for all of the connecting wires 26.

Therefore, the length of each of the set of connecting wires 26 can be shortened.

In addition, the space for wires can be reduced.

In order to make the space for the wires as small as possible, it is desirable that the set of connecting wires 26 be located in the angular range R1 in the plan view.

That is, it is desirable that the plurality of connecting wires 26 be routed such that all of the connecting wires 26 are within the angular range R1.

-23 CZ 309325 B6

If the position at which each connecting wire 26 is led out from each terminal 24 lies within the angular range R1, then each connecting wire 26 can be led out from each terminal 24 in any direction.

In this embodiment, each connecting wire 26 is brought out toward the center of the angular range R1.

That is, the first connecting wire 26a and the second connecting wire 26b are brought out in the direction of the third straight line L3, passing through the center PO of the container 20 and the center point P3 between the center P1 of the first terminal 24a and the center P2 of the second terminal 24b.

Therefore, the space for the wires can be smaller.

As already described above, the angular range R1 defined by straight lines passing through the center of the upper portion 20b of the container 20 and passing through the centers of the set of terminals 24 is 180° or less in this embodiment.

The range of directions in which each connecting wire 26 connected to each terminal 24 is brought out falls within the angular range R1.

According to Fig. 10, before the body part 20a and the upper part 20b of the container 20 are connected, the connecting wires 26, directed from the stator 41, are connected to the terminals 24 through groups 72 on the inside of the upper part 20b of the container 20.

Then, the point P4 of the body part 20a of the container 20 and the point P5 of the upper part 20b of the container 20, which lie within the angular range R1, are aligned with each other, and the point P6 of the body part 20a of the container 20 and the point P7 of the upper part 20b of the container 20, which are opposite in appearance to point P4 and point P5, are aligned with each other, and the upper part 20b of the container 20 is attached to the body part 20a of the container 20 by welding so that the hole in the body part 20a of the container 20 is covered.

When the point P4 of the body part 20a of the container 20 and the point P5 of the upper part 20b of the container 20 are aligned with each other, and the point P6 of the body part 20a of the container 20 and the point P7 of the upper part 20b of the container 20 are aligned with each other, then the point where each connecting the wire 26 drawn from the stator 41 also lies on the side of the point P4, that is, in the angular range R1.

Therefore, each connecting wire 26 can be connected to each terminal 24 in the shortest interval.

Using the connection method described above, the compressor 12 can be assembled in such a way that the connecting wires 26 do not have to run longer than necessary, and the connecting wires 26 do not have to hang in the container 20.

In the comparative example shown in Fig. 11, if the direction in which the connecting wire 26 connected to a certain terminal 24 is brought out lies outside the angular range R1, and the position where the corresponding connecting wire 26 is led from the stator 41. when the body the part 20a of the container 20 and the upper part 20b of the container 20 are connected, also lying outside the angular range R1. thus, the respective connecting wire 26 or other connecting wire 26 is extended more than necessary, so that sag occurs in the container 20.

In this comparative example, then, the direction in which the first connecting wire 26a. connected to the first terminal 24a is brought out, lies outside the angular range R1, thus causing the second connecting wire 26b connected to the second terminal 24b to be extended more than necessary.

Extending the connecting wire 26 reduces the distance between the connecting wire 26 and the oil separator 29, so that the connecting wire 26 may come into contact with the oil separator 29 and be damaged.

-24 CZ 309325 B6

In addition, the connecting wire 26 passes near the discharge pipe 22, making it more likely that the cooling engine oil 25 that is pumped into the upper space of the container 20 will be caught in the connecting wire 26, enter the discharge pipe 22, and be forced out from container 20.

As a way to prevent sag, the connecting wires 26 can be bonded together, but the cost of parts and cost of labor increases.

In addition, the cooling machine oil 25 is trapped in the belt, making it more likely that the cooling machine oil 25 will be forced out of the container 20.

Each first terminal 24a and second terminal 24b has three pins 71.

It is desirable that the three pins 71 of the first terminal 24a and the three pins 71 of the second terminal 24b are located symmetrically with respect to the third line L3.

At least one connecting wire 26. formed from the plurality of connecting wires 26. is connected to one terminal 24. formed from the plurality of terminals 24. via group 72.

In this embodiment, the first connecting wire 26a and the second connecting wire 26b are connected to the first terminal 24a and the second terminal 24b via groups 72, respectively.

For the connection of the connecting wire 26 and the terminal 24 on the inner side of the upper part 20b of the container 20, a group 72 is used, formed by coating the metal connecting connection with a resin coating.

Three pins 71 can be connected at the same time, which improves work productivity.

It should be emphasized that in order to prevent improper connection between terminals 24, group 72 may be used for one or more terminals 24 and only a metal connecting terminal may be used for each of the remaining terminals 24.

In this embodiment, the three pins 71 of one end 24 and the three pins 71 of the other end 24 are positioned symmetrically with respect to a straight line passing through the center of the discharge tube 22 and the center point of the two ends 24.

The connecting wires 26, connected to the three pins 71 of each of the terminals 24, are led out in the direction of this straight line.

Therefore, the connecting wires 26 can be brought out simultaneously near the point P4 of the body part 20a of the container 20 and the point P5 of the upper part 20b of the container 20.

Therefore, the lengths of the connecting wires 26 can be set to the same and minimum lengths.

There is no sag in the container 20 for any of the connecting wires 26, so that better work productivity during the connection is ensured.

Common components can be used to connect the wires 26. so that component costs are reduced while component efficiency is improved.

Giant. 12 shows the upper surface of the compressor part 12 as viewed along the axial direction DO, as in Fig. 5.

-25 CZ 309325 B6

In Fig. 12, a set of power wires 27 is connected on the outside of the container 20 to a set of terminals 24.

A set of power wires 27 electrically connects the set of terminals 24 and the external power source.

The plurality of power wires 27 includes a first power wire 27a. connected to the first terminal 24a. and the second power wire 27b, connected to the second terminal 24b.

It should be noted that when the set of terminals 24 includes a terminal 24 different from the first terminal 24a and the second terminal 24b, then the set of power wires 27 may include a different power wire 27 connected to the respective different terminal 24.

The portion extending from the end connected to each terminal 24 of each power wire 27 is brought out of the existing range R2 of each terminal 24 in plan view.

The position at which a particular feed wire 27 extending from its end connected to a particular terminal 24 crosses the boundary of the existing range R2 of that terminal 24 in plan view is the position where this feed wire 27 is brought out.

Each power wire 27 may be led out from each terminal 24 in any direction.

In this embodiment, the first power wire 27a is led out in the direction from the third straight line L3, and the second power wire 27b is led out in the direction of the third straight line L3 in the plan view.

That is, the first power wire 27a is brought out in the direction from the third straight line L3 in the plan view.

The second power wire 27b is led out in the direction of the third straight line L3 in the plan view.

It should be noted that the first power wire 27a may be led out in the direction of the third line L3 and the second power wire 27b may be led out in the direction of the third line L3 in the plan view.

Alternatively, the first power wire 27a and the second power wire 27b may be led out in the direction from the third straight line L3 in the plan view.

As already described above, the power supply wires 27 for supplying power are connected on the outside of the upper part 20b of the container 20 to the terminals 24 in this embodiment.

In order to prevent incorrect wiring when installing the compressor 12 in the refrigeration cycle device 10, or when replacing the compressor 12, it is desirable to keep the supply wires 27 apart from each other so that they can be clearly distinguished, even when the cap is attached, instead of converging the set of power wires 27, as in the comparative example shown in Fig. 13.

Miswiring can be prevented by leading out one of the power wires 27 in a direction from a straight line passing through the center of the discharge tube 22 and the center point of the set of terminals 24, as shown in Fig. 12.

A description of the effects of this embodiment follows.

The angular range R1 represents a range of 180° or less defined by the first straight line E1. passing through the center PO of the container 20 and the center PI of the first terminal 24a, and the second straight line L2, passing through the center PO of the container 20 and the center P2 of the second terminal 24b in plan view.

-26 CZ 309325 B6

In this embodiment, each connecting wire 26 that electrically connects each terminal 24 and the electric motor 40 is led out of the existing range R2 of each terminal 24 at a position within the angular range R1 in the plan view.

Therefore, the length of each connecting wire 26 can be shortened.

According to this embodiment, a compressor 12 capable of operating at high efficiency and high speed, and having a small size, can be obtained by arranging a plurality of terminals 24 without increasing the outer diameter of the container 20.

According to this embodiment, even when the places where each of the terminals 24 and the discharge pipe 22 arranged in the upper part 20b of the container 20 are in close proximity to each other are enlarged, there is no stress concentration in the area between each of the terminals 24 and the discharge pipe pipe 22 when the pressure inside the container 20 is high.

As a result, the container 20 is not prone to deformation.

It is possible to prevent the leakage of the gaseous agent and the damage or breakage of the ends 24 due to the deformation of the container 20.

According to this embodiment, a set of connecting wire sets 26 for connecting the electric motor 40 and terminals 24 is required.

The risk of damage or breakage of the wires due to contact with the structure rotating at high speed with the rotor 42 in the container 20 can be reduced.

Work productivity in connecting the connecting wires 26 to the terminals 24 is increased.

In this embodiment, the first flat part 81, where the terminals 24 are located, is inclined with respect to the virtual perpendicular plane, located perpendicular to the axial direction DO.

This increases the distance between the discharge pipe 22 and each of the ends 24, as well as the distance between each of the ends 24 and the peripheral wall of the container 20.

Therefore, even in the case where the set of ends 24 is arranged while maintaining the outer diameter of the container 20, stress concentration between the discharge tube 22 and each of the ends 24 is prevented, and the container 20 is not prone to deformation.

This means that the strength of the container 20 can be guaranteed.

The angular range R1 connecting the center of the container 20 and the center of each of the set of terminals 24 is 180° or less in plan view.

The direction in which each of the connecting wires 26 is brought out lies within the angular range R1.

This allows the plurality of tie wire assemblies 26 to be positioned to prevent the structure from rotating at high speed with the rotor 42, while also allowing the plurality of terminals 24 to be positioned to converge.

Therefore, there is no failure or breakage of the connecting wires 26.

The productivity of assembly work is improved.

Terminals 24 can be easily located.

-27 CZ 309325 B6

Giant. 14 shows the result of the comparison of the magnitude of the deformation with respect to the internal pressure in the upper part 20b of the container 20 in this embodiment and in the upper part of the container in the comparative example.

In order to achieve the results shown in Fig. 14, the numerical analysis condition was set for the upper part 20b of the container 20 with a load pressure of 5 MPa, and the amount of deformation under the load was calculated.

The black bars on the graphs represent the magnitude of change for this embodiment, while the white bars on the graph represent the magnitude of change for the comparative example.

The amount of deformation at the top of the container in the comparative example was set to 100%.

The amount of deformation between the discharge pipe 22 and the end piece 24 at the upper part 20b of the container 20 was reduced to about 50% compared to the comparative example.

The amount of deformation in the central part of the end piece 24 was reduced to about 80% compared to the comparative example.

It is believed that this is because the distance between the discharge tube 22 and the terminal 24 is sufficiently maintained.

It is also believed that another factor is that the first flat portion 81, where the end caps 24 are located, and the curved portion 83, where the discharge tube 22 is located, are connected by a recessed portion 84, which is smooth.

Thus, it was found that through the construction of the upper part 20b of the container 20 in this embodiment, the stress concentration is alleviated, and the deformation of the upper part 20b of the container 20 can be greatly reduced.

According to this embodiment, the stress acting on the terminal 24 can be greatly reduced, and leakage of refrigerant due to small cracks or the like in the glass part of the terminal 24 can be prevented.

Even if a refrigerant that is flammable but has a low global warming potential, such as R290, is sealed in the container 20, the flammable refrigerant does not escape from the container 20 and safety is maintained.

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

This embodiment can be applied not only to the vertical-type compressor 12, but also to the horizontal-type compressor, in which a disk-shaped hermetic container is pressed into an empty part of a cylindrical hermetic container, and the discharge pipe is arranged in the center.

As regards the second embodiment of this invention, the differences from the first embodiment will be described in particular with reference to Fig. 15.

Giant. 15 shows the upper surface of the compressor part 12 as viewed along the axial direction DO.

In the first embodiment, the plurality of terminals 24 are located together in a single first flat portion 81.

In this second embodiment, the set of terminals 24 is divided for placement in two or more first flat portions 81.

-28 CZ 309325 B6

The surface area of each of the first flat portions 81 has an oval shape such as an ellipse or a rounded rectangle.

The edge of each of the first flat portions 81 is connected to the curved portion 83 through a recessed portion 84 which is smoothly curved.

That is, the portion between each of the first flat portions 81 and the curved portion 83 is recessed.

The recessed portion 84 is formed as a strong portion, having a rib function to improve strength.

In this embodiment, each of the first flat portions 81 is inclined relative to the virtual perpendicular plane at an angle of inclination that is farther from the virtual perpendicular plane as the distance to the center axis of the container 20 decreases along the two directions.

In particular, the whole of each first flat portion 81 is inclined with respect to the virtual perpendicular plane at a first inclination angle Θ1 along the first direction D1.

Thereby, the portion including one end in the first direction D1 of each of the first flat portions 81 is further separated from the virtual perpendicular plane as the distance to the center axis of the container 20 decreases along the first direction D1.

The remaining portion including the second end in the first direction D1 of each of the first flat portions 81 is further separated from the virtual perpendicular plane as the distance to the center axis of the container 20 increases along the first direction D1.

The first inclination angle Θ1 is preferably from 5° to 30°, while it is 5° in this embodiment.

All of each first flat portion 81 is inclined with respect to the virtual perpendicular plane at a second inclination angle Θ2 along the second direction D2.

Thereby, the portion comprising one end in the second direction D2 of each of the first flat portions 81 is further separated from the virtual perpendicular plane as the distance to the center axis of the container 20 decreases along the second direction D2.

The remaining portion including the second end in the second direction D2 of each of the first flat portions 81 is further separated from the virtual perpendicular plane as the distance to the center axis of the vessel 20 increases along the second direction D2.

The second angle Θ2 of inclination is preferably from 5° to 30°, while it is 10° in this embodiment.

It should be emphasized that at least one first angle Θ2 of inclination and the second angle Θ2 of inclination of the first flat parts 81 can be different for each of the first flat parts 81.

This means that the angles of inclination of the first flat parts 81 can be different for each terminal 24.

In this embodiment, the rod 28 is located on the underside of each first flat portion 81.

The rod 28 is arranged to extend along the axial direction DO.

A third embodiment of this invention is shown in Fig. 16.

In the first embodiment, the connecting wires 26 are made integral with the winding 44 of the electric motor 40.

As shown in Fig. 16, the connecting wires 26 can be connected to the winding 44 of the electric motor 40 through the connecting terminal 47.

-29 CZ 309325 B6

A fourth embodiment of the present invention is shown in Fig. 17.

In the first embodiment, the body part 20a of the container 20 and the bottom part 20c of the container 20 are connected by 5 welding.

As shown in Fig. 17, both the body portion 20a of the container 20 and the bottom portion 20c of the container 20 may be integrally formed.

Claims (18)

1. Compressor (12), containing: a compression mechanism (30) for compressing the refrigerant, an electric motor (40) for driving the compression mechanism (30), a container (20) for storing the compression mechanism (30) and the electric motor (40), a set of terminals, and a set of connecting wires (26), characterized wherein the set of terminals includes a first terminal (24a) and a second terminal (24b) and is attached to one axial end of the container (20), the center of each terminal of the set of terminals is located in a plan view within an angular range (Rl) of 180° or less, defined by a first straight line (LI) passing through the center (PO) of the container (20) and the center (P1) of the first terminal (24a), and a second straight line (L2) passing through the center (PO) of the container (20) and the center (P2 ) of the second terminal (24b), and a set of connecting wires (26) for electrical connection inside the container (20) of the terminal set and the electric motor (40) is led out from the terminal set to an angular range (Rl) in a plan view. 2. The compressor (12) according to claim 1, characterized in that the set of connecting wires (26) is located in the angular range (Rl) in the plan view. 3. Compressor (12) according to claim 1 or 2, characterized in that the set of connecting wires (26) includes a first connecting wire (26a) that electrically connects the first terminal (24a) and the electric motor (40), and a second connecting wire ( 26b) which electrically connects the second terminal (24b) and the electric motor (40), wherein the first connecting wire (26a) and the second connecting wire (26b) are brought out in the plan view in the direction of the third straight line (L3) passing through the center (PO ) container (20) and the center point (P3) between the center (P1) of the first end (24a) and the center (P2) of the second end (24b). 4. The compressor (12) according to claim 1 or 2, characterized in that it further comprises a set of power wires (27) connected on the outside of the container (20) with a set of terminals (24), wherein the set of power wires (27) includes the first a power wire (27a) connected to the first terminal (24a) and a second power wire (27b) connected to the second terminal (24b), and wherein at least one of the first power wire (27a) and the second power wire (27b) is led out in plan view in the direction from the third line (L3), passing through the center (PO) of the container (20) and the center point (P3) between the center (Pl) of the first end (24a) and the center (P2) of the second end (24b). 5. Compressor (12) according to claim 3 or 4, characterized in that each first end (24a) and second end (24b) has three pins (71), the three pins (71) of the first end (24a) and three pins (71) the second ends (24b) are placed symmetrically with respect to the third line (L3). 6. The compressor (12) according to any one of claims 1 to 5, characterized in that at least one connecting wire included in the set of connecting wires (26) is connected to one terminal included in the set of terminals via the group (72). 7. The compressor (12) according to any one of claims 1 to 6, characterized in that it further comprises a discharge tube (22) arranged at one axial end of the container (20) in a position that overlaps in front of the central axis of the container (20), in order to force the coolant out of the container (20), the container (20) having at one axial end of the container (20) a curved part (83) where the discharge tube (22) is located and at least one flat part where the set of ends placed with at least one flat portion inclined relative to a virtual perpendicular plane which is -31 CZ 309325 B6 located between the set of terminals and the electric motor (40) and which is perpendicular to the axial direction (DO) of the container (20), at an angle of inclination that is further below the virtual perpendicular plane when the distance to the central axis of the container (20 ) decreases along at least one direction. 8. Compressor (12) according to claim 7, characterized in that the angle of inclination is from 5° to 30° with respect to the virtual perpendicular plane. 9. A compressor (12) according to claim 7 or 8, characterized in that at least a part containing one end in the first direction (Dl) which is perpendicular to the axial direction (DO) of at least one flat part is inclined with respect to the virtual perpendicular plane at a first angle (Θ1) of inclination which is further from the virtual perpendicular plane as the distance to the central axis of the vessel (20) decreases along the first direction (Dl), wherein at least a part including one end in the second direction (D2) which is perpendicular to the axial direction (DO) and the first direction (Dl), at least one flat part is inclined with respect to the virtual perpendicular plane at a second angle (Θ2) of inclination, which is further from the virtual perpendicular plane when the distance to the central axis of the vessel ( 20) decreases along the second direction (D2). 10. Compressor (12) according to claim 9, characterized in that the second angle (Θ2) inclines different from the first angle (Θ1). 11. Compressor (12) according to any one of claims 7 to 10, characterized in that the set of terminals is located together in one flat part. 12. A compressor (12) according to any one of claims 7 to 10, characterized in that the set of terminals is divided for placement in two or more flat parts. 13. A compressor (12) according to any one of claims 7 to 12, characterized in that the container (20) contains at one axial end of the container (20) a different flat part, where the accessories, different from the set of terminals, are located, while the different flat the part has a shorter maximum distance from the virtual perpendicular plane than the maximum distance from the virtual perpendicular plane to at least one flat part. 14. A compressor (12) according to any one of claims 7 to 12, characterized in that it further comprises a rod (28) to which a cap is attached for covering a plurality of terminals, the vessel (20) comprising at one axial end of the vessel (20) a different flat part where the rod (28) is located. 15. A compressor (12) according to any one of claims 7 to 14, characterized in that the discharge pipe (22) is connected to the curved part (83) by means of an annular member (85) and extends into the interior of the container (20) to a position closer to compression mechanism (30) compared to the distance from the annular member (85) to the compression mechanism (30). 16. A compressor (12) according to any one of claims 7 to 15, characterized in that one axial end of the container (20) has a circular shape in plan view, and the outer diameter of the discharge tube (22) is 0.1 times or more the outer diameter diameter of one axial end of the container (20). 17. The compressor (12) according to any one of claims 1 to 16, characterized in that the part extending from the end connected to each terminal of each connecting wire of the set of connecting wires (26) is led out of the existing range (R2) of each terminal in position within the angular range (Rl) in plan view. 18. Refrigeration cycle device (10), characterized in that it contains a compressor (12) according to any one of claims 1 to 17. 12 drawings -32CZ 309325 B6 relative marks: refrigeration cycle device refrigeration circuit refrigerant compressor four-way valve first heat exchanger, outdoor heat exchanger expansion valve, expansion mechanism second heat exchanger, indoor (room) heat exchanger control device container body part of container upper part of container lower part of container suction pipe discharge pipe muffler suction end first end second end cooling machine oil connecting wire first connecting wire second connecting wire power wire first power wire second power wire rod oil separator compression mechanism cylinder rolling piston main bearing secondary bearing discharge damper fasteners part for applying solid lubricant electric motor stator rotor stator core stator winding rotor core rotor permanent magnet -33 CZ 309325 B6 connecting end through hole crankshaft eccentric section of the crankshaft main section of the crankshaft secondary section of the crankshaft through hole cylindrical chamber blade groove back pressure chamber blade pin group first flat part end part end part second flat part curved part recessed part annular member axial direction first direction second direction distance first straight line second straight line third straight line center of vessel center of first ends center of second ends center point point point point point angular range existing range first inclination angle second inclination angle