CZ309414B6 - Compressor and refrigeration cycle equipment - Google Patents

Abstract

The compressor (12) includes a compression mechanism (30) for compressing the refrigerant, a motor (40) for driving the compression mechanism, a container (20) for storing the compression mechanism (30) and the motor (40), and the container (20) has a body part (20a) with a cylindrical tubular shape, a first end (24a) and a second end (24b), installed at one axial end of the vessel (20), and a first connecting line (26a) and a second connecting line (26b). The first connecting line (26a) and the second connecting line (26b) are guided along the curvature of the inner peripheral wall (20d) of the container (20) in a plan view, the inner peripheral wall (20d) represents the inner surface of the cylindrical tubular shape of the body part (20a) for the respective electrical connection of the first terminal (24a) and the second terminal (24b) to the motor (40) in the vessel (20) without intersecting each other 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 electric compressor, in which the compression mechanism part and the rotor part are stored in a hermetic container, the motor part consists of a rotor and a stator.

The rotor is connected to the compression mechanism part via the main shaft.

The stator is attached to the hermetic container by a method such as hot fit.

The stator is connected to the sealing end, arranged on the hermetic container, through a line connection connected to the stator winding.

Part of the compression mechanism is driven by the action of external energy through the sealing end.

As means of achieving both high low-speed efficiency and high-speed operation, a hermetic-type electric compressor in which two sealing ends are arranged on a hermetic container, one of the sealing ends being connected to the first connecting line of the motor part winding and the other sealing end the terminal is connected to the second connecting line of the winding of the motor part, it is described in patent documents JP 2006246674 A, JP 2009191822 A and JP 2012082776 A.

As means for preventing the first connecting line and the second connecting line from touching the hermetic container, the rotor, or the discharge pipe and causing malfunctions, a hermetic type electric compressor in which the connecting material is made of resin for connecting the first connecting line and the second connecting line guiding each other, is described in the patent file JP 2009191822 A.

In the hermetic type electric compressor described in patent documents JP 2006246674 A, JP 2009191822 A and JP 2012082776 A, the connecting line passes near the discharge pipe.

The connecting lines cross each other, regardless of their length dimensions, and there is a risk of mutual crossing, which is greater the larger the length dimension of the connecting lines, or these connecting lines are connected to each other by means of a connecting material.

For the above reasons, then, the oil that has risen up into the space at the top of the hermetic container remains at the intersecting parts or connecting parts of the connecting lines, being prone to be discharged out of the compressor through the discharge pipe together with the compressed gaseous coolant.

As a result, compressor reliability is reduced based on oil leakage.

The object of this invention is to reduce the amount of oil that remains on the connecting lines.

-1 CZ 309414 B6

The essence of the invention

The above object has been achieved according to the present invention by developing a compressor which, according to one aspect of the present invention, comprises:

a compression mechanism for compressing the refrigerant, a motor for driving the compression mechanism, a container for housing the compression mechanism and the motor, the container comprising a body part having a cylindrical tubular shape, a first terminal and a second terminal installed at one axial end of the container, and a first connecting line and a second connecting line.

The first connecting line and the second connecting line are guided along the curvature of the inner peripheral wall of the container in a plan view, with the inner peripheral wall representing the inner surface of the cylindrical tubular shape of the body part for the respective electrical connection of the first terminal and the second terminal to the motor in the container without intersecting each other in the plan view .

Each of the first connecting line and the second connecting line preferably consists of a plurality of lead wires, and at least one of the lead wires included in the first connecting line and at least one of the lead wires included in the second connecting line are led out, respectively, from the first terminal and the second terminal in such a direction , that they come into close proximity to each other, and are then guided in a direction away from each other along the inner peripheral wall of the container.

At least one of the guide wires included in the first connecting line is preferably guided in such a way that it crosses the shortest straight line that connects the first terminal and the inner peripheral wall of the container in the plan view.

According to one preferred embodiment, each of the first connecting line and the second connecting line consists of a set of guide wires, the set of guide wires being bound by means of a sleeve having a length equal to or less than 60% of the length of the shortest guide wire of the set of guide wires.

The compressor according to the present invention further advantageously contains:

a discharge pipe arranged in a position overlapping the central axis of the vessel at one axial end of the vessel for forcing refrigerant out of the vessel, wherein the first end and the second end are installed in a position that deviates from the central axis of the vessel at one axial end of the vessel , and each of the first connection line and the second connection line consists of a plurality of guide wires, wherein a plurality of connection terminals connected to the motor are arranged at the ends of the plurality of guide wires, and in a plan view, each of the plurality of connection terminals of the first connection line and the second connection line is located within a range of 60° around the center of the discharge pipe with respect to a straight line connecting the center of the discharge pipe and the center of the first terminal and the second terminal.

According to the present invention, a refrigeration cycle device comprising the compressor defined above has also been developed.

-2 CZ 309414 B6

In the present invention, the connection lines are preferably run along the inner peripheral wall of the container.

As a result, even when the longitudinal dimensions of the connecting lines are large, the connecting lines do not cross each other and the part where the oil remains will not be prone to develop on the connecting lines.

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, in which:

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

Fig. 2 shows a circuit diagram of a cooling cycle device according to embodiment 1;

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

Fig. 4 shows a sectional view of a part of the compressor according to embodiment 1;

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

Fig. 6 shows a plan view of a part of a compressor according to a comparative example;

Fig. 7 shows a plan view of a part of the compressor according to embodiment 2;

Fig. 8 shows a longitudinal sectional view of the compressor according to embodiment 3; and Fig. 9 shows a longitudinal sectional view of the compressor according to embodiment 4.

Examples of implementation of the invention

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

Identical or equivalent components 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 implemented partially.

Execution 1

The first embodiment will now be described with reference to Fig. 1 to Fig. 6.

-3 CZ 309414 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.

Although the cooling cycle device 10 is an air conditioning device in this embodiment, the cooling cycle device 10 may be a device other than an air conditioning device, for example, it may be a cooling 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, a four-way valve 13, a first heat exchanger 14, which is an outdoor heat exchanger, an expansion mechanism 15, which is an expansion valve, and a second heat exchanger 16, which is an indoor or room heat exchanger.

Compressor 12. four-way valve 13. first heat exchanger 14. expansion mechanism 15 and second heat exchanger 16 are connected to the refrigerant circuit 11.

Compressor 12 compresses the refrigerant.

The four-way valve 13 switches the direction of the refrigerant flow between the cooling operation and 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.

The expansion mechanism 15 ensures the expansion of the refrigerant that has been dispersed 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.

For example, the Γ7 controller is designed as a microcomputer.

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 another

-4 CZ 309414 B6 of an element connected to the refrigerant circuit 11, which is different from the compressor 12.

The controller 17 monitors and controls the status of each element 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 refrigerant circuit 11.

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

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-mentioned refrigerants is used.

"HFC" stands for hydrofluorocarbon.

"HFO" stands for hydrofluoroolefin.

The arrangement of the compressor 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 an electric compressor of the hermetic type.

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 engine 40 and a crankshaft 50.

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.

A suction pipe 21 for sucking the refrigerant into the container 20 and a discharge pipe 22 for pushing the refrigerant out of the container 20 are installed on the container 20.

The motor 40 is stored in the container 20.

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

Although in this embodiment the motor 40 is formed as a concentrated winding motor, the motor 40 may also be formed 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.

That is, the compression mechanism 30 is located below the motor 40 in the container 20.

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

The crankshaft 50 forms an oil path for supplying cooling engine oil 25 and forms

-5 CZ 309414 B6 motor rotating shaft 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 engine oil 25, POE, PVE, AB, or the like, each of which is a synthetic oil, may be used.

"POE" stands for Polyolester.

"PVE" stands for Polyvinyl Ether.

"AB" stands for alkylbenzene.

The engine 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 engine 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 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.

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, that is, the eccentric section 51 of the crankshaft 50, the main section 52 of the crankshaft 50, and the minor section 53 of the crankshaft 50, has 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

-6 CZ 309414 B6 of the shaft 50 and the secondary 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 tubular 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.

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 bottom 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.

The more detailed details of engine 40 will now be described further.

Although the motor 40 in this embodiment is formed as a brushless direct current (DC) motor, the motor 40 may be formed as a motor other than a brushless DC motor, such as an induction motor.

"DC" stands for direct current.

The motor 40 includes 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 set of electromagnetic steel sheets or plates containing iron as the main component into a certain shape;

- layering of punched sheets or plates of electromagnetic steel in the axial direction DO; and

-7 CZ 309414 B6

- fastening of laminated sheets or plates of electromagnetic steel through theming.

The thickness of each sheet or plate 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.

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 made of AI/EI.

"AI" stands for amide-imide.

"El" stands for st-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 polytetrafluoroethylene.

"LCP" stands for Liquid Crystal Polymer.

"PPS" stands for Polyphenylene Sulfide.

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

Similarly to the case of the stator core 43 of the stator 41, the rotor core 45 of the rotor 42 is also

-8 CZ 309414 B6 produced by:

- piercing or perforating each of a plurality of electromagnetic steel plates, each containing iron as a major component, into a particular shape;

- layering of perforated electromagnetic steel plates in the axial direction; and

- fastening of laminated plates of electromagnetic steel 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.

The method of mutually attaching the rotor core plates 45 of the electromagnetic steel rotor 42 to each other is not limited to threading, 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 is formed around the shaft hole in the rotor core 45 of the rotor 42.

Each through hole serves as one passage 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. supplied to the upper part of the container 20. to fall down into the lower part of the container 20.

Although not shown, if the motor 40 is formed as an induction 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.

In the upper part 20b of the container, a terminal 24 connected to an external power source such as an inverter device is then 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.

The connecting line 26 extending from the winding 44 of the motor 40 is connected to the terminal 24, for

-9 CZ 309414 B6 electrical connection of terminal 24 and motor 40.

The discharge pipe 22, both axial ends of which are open, is further arranged on 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 in that order and is discharged from the space inside the container 20 through the discharge pipe 22 into the external cooling circuit 11 of the refrigerant.

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

The oil separator plate 29 is fixed to the crankshaft 50 by pressing, rotating together with the rotation of the crankshaft 50.

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

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

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

Although the discharge pipe 22 may be located on the outer peripheral section of the upper portion 20b of the container 20, the discharge pipe 22 is located directly above the crankshaft and in the central section of the upper portion 20b of the container 20 in this embodiment.

If the discharge pipe 22 is located on the outer peripheral portion of the upper part 20b of the container 20, there is a possibility that the cooling machine oil 25 separated through the oil separator plate 29 enters the discharge pipe 22 and is discharged out of the container 20, resulting in to the fact that the amount of cooling machine oil 25 in the container 20 decreases, which can 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.

It is desirable that the outer diameter of the discharge pipe 22 be from 0.1 to 0.2 times the outer diameter of the top 20b of the vessel 20.

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

The discharge pipe 22 is connected to the upper part 20b of the container 20 by means of an annular material.

The annular material 27 is formed of iron.

By attaching the annular material 27 to the discharge pipe 22 and pressing the inclined part of the annular material 27 to the upper part 20b of the container 20, the upper part 20b of the container 20 comes into contact with the entire circumference of the annular material 27 without any gaps, improving weldability.

The discharge pipe 22 runs inside the container 20 to a position closer to the compression mechanism 30 compared to the annular material 27.

- 10CZ 309414 B6

As already described above, due to the fact that the discharge tube 22 protrudes towards the compression mechanism 30 more than the annular material 27, the cooling machine oil 25. trapped in the inclined part of the annular material 27. can be prevented from entering the discharge pipes 22.

The method of installing 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 using solder material or laser welding.

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

As a result, if the end piece 24 is to be installed by resistance welding after the discharge tube 22 is installed by gas welding, there is a possibility that deformations will occur on the surface area in the portion of the upper part 20b of the vessel 20 when the end piece 24 is to be installed.

If deformations occur, the surface surface of the upper part 20b of the container 20 and the surface surface of the end piece 24 do not come into contact with each other, which may cause faulty welding during resistance welding.

Therefore, when welding the discharge tube 22, it is also desirable to focus on reducing heat input and on reducing the extent of heat input when using resistance welding or laser welding.

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 an axial direction.

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

The compression mechanism 30 includes a cylinder 31, a rolling piston 32, a main bearing 33, a secondary bearing 34 and a shock absorber 35.

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.

The suction hole for sucking the gaseous coolant from the cooling circuit 11 of the coolant is 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.

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.

- 11 CZ 309414 B6

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 is 12 started.

Therefore, the vane spring is mainly used for the purpose of pressing the vane 64 on the rolling 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 61.

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, is formed inside the crankshaft 50 in the axial direction.

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. sucked in 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 machine oil 25. sucked in through the through hole 54 of the crankshaft 50.

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.

- 12CZ 309414 B6

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 discharge hole for extruding the refrigerant compressed in the cylinder chamber 61 into the refrigerant cooling circuit 11 is arranged in the main bearing 33.

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 openable/closeable blocking of the discharge hole is attached to the main bearing 33.

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 .

The discharge hole and the discharge valve may be arranged on the secondary bearing 34. or they may 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 prevents the direct entry of the liquid coolant into the cylinder chamber 61 of the cylinder 31 when the liquid coolant 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.

- 13 CZ 309414 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.

Together with the rotation of the rolling piston 32, the vane 64 moves forward and backward in the radial direction during the oscillating movement, thereby 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 according to this first 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 motor 40 via connecting line 26.

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

The rotor 42 of the 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 46 of the rotor 42.

In particular, the rotor 42 rotates through the attractive and repulsive action between the rotating

- 14CZ 309414 B6 with the magnetic field that is generated due to the passage of current through the winding 44 of the stator 41 and the magnetic field of the permanent magnets 46 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 gas refrigerant further passes through the motor 40 and is forced out of the container 20 from the discharge pipe 22 on the upper part 20b of the container 20.

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

The details of the arrangement of the compressor 12 according to this embodiment will now be described in more detail with reference to Fig. 5 and Fig. 6, in addition to Fig. 3.

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

The upper part 20b 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.

That is, the discharge tube 22 is arranged in a position that overlaps with the central axis of the container 20 at one axial end of the container 20.

At the upper part 20b of the container 20, a set of terminals 24 is arranged around the discharge tube 22.

That is, the set of terminals 24 is installed in a position that deviates from the center axis of the container 20 at only the axial end of the container 20.

A plurality of terminals 24 is electrically connected to a motor 40 in a container 20 via a plurality of connecting lines 26 .

Each terminal 24 is fixed in a through hole formed in the upper part 20b of the container 20.

The outer periphery of each terminal 24 is in contact with the inner peripheral interface of the through hole.

Although omitted in Fig. 5, the rod 28 which extends in the axial direction is also arranged in the upper part 20b of the container 20.

- 15 CZ 309414 B6

For example, a temperature sensor may be further attached to the top portion 20b of the container 20.

The first terminal 24a and the second terminal 24b are included in the set of terminals 24.

Another terminal 24. other than the first terminal 24a and the second terminal 24b. can be included in the set of endings 24.

The first connecting line 26a, which electrically connects the first terminal 24a and the motor 40 in the container 20, and the second connecting line 26b. which electrically connects the second terminal 24b and the motor 40 in the container 20 are included in the set of connecting lines 26.

When a different terminal 24. different from the first terminal 24a and the second terminal 24b. is included in the set of terminals 24. so another connecting line 26, which electrically connects another terminal 24 and the motor 40 in the container 20, may be included in the set of connecting lines 26.

The first connecting line 26a and the second connecting line 26b are guided along the inner peripheral wall 20d of the container 20.

As a result, 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 will not intersect each other in a plan view, while they can electrically connect the first end 24a and second end 24b to motor 40 in container 20.

As shown in Fig. 6, if the first connecting line 26a and the second connecting line 26b intersect each other in the plan view, the cooling machine oil 25 that has risen up into the space in the upper part of the container 20 remains in the intersecting part of the first connecting line 26a and the second connecting line 26b, being liable to be discharged out of the container 20 through the discharge pipe 22 together with the gaseous refrigerant that has been compressed.

As a result, and compared to the case where only one sealing end for the hermetic container is used, the rate of oil circulation increases, so there is a risk that the reliability of the compressor 12 will be reduced due to oil leakage.

In this embodiment, the decrease in reliability of the compressor 12 due to oil leakage can be prevented by not forming any intersecting portion of the first connecting line 26a and the second connecting line 26b.

When a connecting line 26 other than the first connecting line 26a and the second connecting line 26b is included in the plurality of connecting lines 26, it is required that not only the first connecting line 26a and the other connecting line 26 do not cross each other in the plan view, but also that the second connecting line 26b and the other connecting line 26 did not cross each other in the plan view.

It is therefore desirable that another connecting line 26 is also routed along the inner peripheral wall 20d of the container 20.

In this embodiment, each of the first connection line 26a and the second connection line 26b consists of a plurality of guide wires.

Specifically, it can be said that the first connecting line 26a is formed of three guide wires W1. W2 and W3, with the second connecting line 26b ie formed from three conductor wires W4, W5 and W6.

A plurality of connection terminals 47. connected to the motor 40 are arranged at the ends of a plurality of guide wires included in each of the first connection line 26a and the second connection line 26a

- 16CZ 309414 B6 by line 26b.

Especially the TI connection terminals. T2 and T3 are arranged at the ends of lead wires W1, W2 and W3, respectively. whereas T4 terminals. T5 and T6 are respectively arranged at the ends of the lead wires W4, W5 and W6.

At least one of the lead wires included in the first connection line 26a and at least one of the lead wires included in the second connection line 26b are led out from the first terminal 24a and the second terminal 24b in such a direction that they come into close proximity to each other, and then are led in direction from each other along the inner peripheral wall 20d of the container 20.

In particular, a group of three lead wires W1, W2, and W3, as well as a group of two lead wires W4 and W5, are led out from the first terminal 24a and the second terminal 24b in such a direction that they come into close proximity to each other, and then are guided in the direction of each other apart along the inner peripheral wall 20d of the container 20.

This means that the guide wires Wl. W2 and W3 are led out from the first terminal 24a. bent approximately in the shape of the letter U in plan view, the portions from the bent portions to the connecting terminals T1, T2 and T3 being guided along the inner peripheral wall 2Od of the container 20.

The guide wires W4 and W5 are led out from the second terminal 24b in such a direction that they come in close proximity to the guide wires W1, W2, and W3, and are bent approximately in the shape of the letter U in plan view, with the portions from the bent portions to the connecting terminals T4 and T5 are guided in the direction from the guide wires W1. W2 and W3 along the inner peripheral wall 20d of the container 20.

Consequently, even if either or both of the first connection line 26a and the second connection line 26b have a longer length dimension, the first connection line 26a and the second connection line 26b will not intersect each other in a plan view, each of which can electrically connect the first terminal 24a and the second end 24b to the motor 40 in the container 20.

In this embodiment, the length dimension of the guide wire W6 is relatively small.

As a result, the guide wire W6 is led out from the second terminal 24b in such a direction that it comes in close proximity to the guide wires W1, W2, and W3, is bent approximately in the shape of the letter S in the plan view, with the portion from the second bent portion to the connecting terminal T6 is guided in the direction where it comes into close proximity to the lead wires W1. W2 and W3 along the inner peripheral wall 20d of the container 20.

However, when the length dimension of the guide wire W6 is not small, it is desirable that the guide wire W6 is also positioned in the same manner as the guide wires W4 and W5.

That is, it is desirable that the guide wire W6 is also led out from the second terminal 24b in such a direction that it comes in close proximity to the guide wires W1. W2 and W3. is bent approximately in the shape of the letter U in plan view, and each part from the bent part to the connecting terminal T6 is guided in the direction of the guide wires W1, W2 and W3 along the inner peripheral wall 20d of the container 20.

At least one of the guide wires included in the first connecting line 26a is guided so as to cross the shortest straight line LI. which connects the first terminal 24a and the inner peripheral wall 20d of the container 20 in a plan view.

Similarly, at least one of the guide wires contained in the second connecting line 26b ie is guided so as to cross the shortest straight line L2. which connects the second end 24b and the inner peripheral wall 20d of the container 20 in a plan view.

- 17CZ 309414 B6

In particular, the lead wire W1, which is the longest of the set of lead wires included in the first connecting line 26a. is drawn so that it crosses the line LI. while the guide wire W4. which is the longest of the set of lead wires included in the second connecting line 26b. is guided so that it crosses the line L2.

Consequently, even if either one or both of the first connecting line 26a and the second connecting line 26b have a longer length dimension, the first connecting line 26a and the second connecting line 26b can certainly be separated from each other.

The first terminal 24a and the second terminal 24b contain three pins 71 each.

A group 72. formed of a resin coating covering a metal connection terminal is used for each connection between the first connection line 26 and the first terminal 24a and the connection between the second connection line 26b and the second terminal 24b.

Work productivity will be improved, as the connection to three pins 71 can be made at once.

In order to prevent improper connection between the first terminal 24a and the second terminal 24b, the group 72 may be used for either one of the first terminal 24a and the second terminal 24b, and an uncoated metal connecting terminal may be used for the other terminal 24.

To prevent the cooling machine oil 25 from remaining on the group 72, an uncoated metal coupling end may be used for both the first end 24a and the second end 24b.

Regarding the positional interrelationship of the connecting end 47 at one end of the connecting line 26, the group 72 at the other end of the connecting line 26, and the discharge pipe 22, the positional interrelationship may be such that the discharge pipe 22 is located between the connecting end 47 and the group 72 in the plan view, but in this embodiment, the mutual positional relationship is such that the discharge tube 22 is not located between the connecting end 47 and the group 72 in the plan view.

By utilizing the above-described mutual positional relationship, the connecting line 26 can be much better separated from the discharge pipe 22.

The same is true when group 72 is not used and an uncoated metal connection terminal at the other end of connection line 26 is used.

In this embodiment, the connecting line 26 is guided along the inner peripheral wall 20d of the container 20.

As a result, even when the length dimension of the connecting line 26 is large, the connecting lines 26 will not intersect with each other, and the portion where the cooling machine oil 25 remains will not be prone to developing the connecting line 26.

In this embodiment, the first connecting line 26a and the second connecting line 26b, electrically connected to the winding 44 of the stator 41, are connected to the first terminal 24a and to the second terminal 24b of the upper part 20b of the container 20 without crossing.

As a result, there is no intersecting portion at the connecting line 26 where the cooling engine oil 25 tends to remain, and the cooling engine oil 25 is not prone to be discharged out of the compressor 12 from the discharge pipe 22 together with the gaseous refrigerant.

- 18CZ 309414 B6

As a result, the oil circulation rate can be prevented from increasing.

Therefore, it is possible to achieve the highest possible efficiency at low speed and enable operation at high speed, while a highly reliable compressor 12 can be created.

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

In order to prevent the line from breaking when the connection line 26 contacts the rotor 42 due to the penetration of the connection line 26, then the three connection wires that form the connection line 26 connected to the three pins of the terminal 24 can be tied together with a plastic sleeve.

In the above case, it is desirable that the length of the sleeve be equal to or less than 60% of the length of the shortest guide wire in order to prevent the cooling machine oil 25 from remaining on the sleeve.

In particular, it is desirable that the three guide wires W1, W2, and W3 forming the first connecting line 26a are bound by a sleeve having a length equal to or less than 60% of the length of the guide wire W3, which is the shortest of the three guide wires W1. W2 and W3.

Similarly, it is desirable that the three guide wires W4, W5, and W6 forming the second connecting line 26b are bound by a sleeve having a length equal to or less than 60% of the length of the guide wire W6. which is the shortest of the three lead wires W4. W5 and W6.

Execution 2

As for the second embodiment, especially those features that are different from the first embodiment will be further described using Fig. 7.

In this embodiment, a constraint is applied to the positional interrelationship of each terminal 24 and the corresponding set of connecting terminals 47.

This means that in the first range, which is an angular range of ±60° relative to the line L3. connecting the center of the discharge pipe 22 of the upper part 20b of the container 20 and the center of the first terminal 24a, three connecting terminals T1, T2 and T3, which respectively connect the winding 44 of the stator 41 of the motor 40 and the three guide wires W1. W2 and W3. which form the first connecting line 26a. are placed.

Similarly, in the second range, which is an angular range of ±60° relative to the line L4, connecting the center of the discharge tube 22 of the upper part 20b of the container 20 and the center of the second end 24b. three connecting terminals T4. T5 and T6. which respectively connect the winding 44 of the stator 41 of the motor 40 and the three lead wires W4. W5 and W6 which form the second connecting line 26b are located.

It is desirable that the first range and the second range do not overlap each other in the plan view.

As already described above, in this embodiment, each of the set of connecting terminals 47 of the first connecting line 26a is located within a range of ±60° around the center of the discharge pipe 22 with respect to the line L3 connecting the center of the first terminal 24a and the center of the discharge pipe 22 in plan view view.

Similarly, each of the set of connecting ends 47 of the second connecting line 26b is located within a range of ±60° about the center of the discharge pipe 22 with respect to a straight line connecting the center of the second end 24b and the center of the discharge pipe 22 in plan view.

- 19CZ 309414 B6

Consequently, by connecting the first connecting line 26a to the first terminal 24a and connecting the second connecting line 26b to the second terminal 24b, it can be ensured that each lead wire included in the first connecting line 26a and the second connecting line 26b. does not pass near the discharge tube 22.

Therefore, the cooling engine oil 25 will not be prone to be drawn out of the compressor from the discharge pipe 22 together with the gaseous refrigerant.

In addition, it is possible that each guide wire included in the first connecting line 26a and the second connecting line 26b. was easily attached without extending each guide wire more than necessary.

Therefore, in the case of the connecting line 26, it can also be prevented from breaking due to contact with the rotor 42, caused by the sag of the connecting line 26 in the container 20, without adding new components, such as a connecting member that connects the connecting line 26 to each other.

Execution 3

In embodiment 1, the connecting line 26 is connected to the winding 44 of the motor 40 through the connecting terminal 47, however, as shown in Fig. 8, the connecting line 26 can be made integral with the winding 44 of the motor 40.

This means that the connecting line 26 extending from the winding 44 of the motor 40 can be connected to the terminal 24.

Execution 4

In embodiment 1, the body part 20a and the bottom part 20c of the container 20 are connected by welding, however, as shown in Fig. 9, both the body part 20a and the bottom part 20c of the container 20 can be made integrally.

Claims (6)

PATENT CLAIMS 1. Compressor (12), containing: a compression mechanism (30) for compressing refrigerant, a motor (40) for driving the compression mechanism, a container (20) for housing the compression mechanism (30) and the motor (40), the container (20) comprising a body part (20a) having a cylindrical tubular shape, a first terminal (24a) and a second terminal (24b) installed at one axial end of the container (20), and a first connecting line (26a) and a second connecting line (26b), characterized in that the first connecting line (26a) and the second connection lines (26b) are guided along the curvature of the inner peripheral wall (20d) of the container (20) in plan view, the inner peripheral wall (20d) representing the inner surface of the cylindrical tubular shape of the body part (20a), for the respective electrical connection of the first terminal (24a) and the second ends (24b) with the motor (40) in the container (20) without intersecting each other in the plan view. 2. Compressor (12) according to claim 1, characterized in that each first connecting line (26a) and second connecting line (26b) consists of a set of guide wires, wherein at least one of the guide wires contained in the first connecting line (26a) and at least one of the lead wires included in the second connecting line (26b) are led out from the first terminal (24a) and the second terminal (24b), respectively, in such a direction as to come into close proximity to each other, and then are led in a direction away from each other along inner peripheral walls (20d) of the container (20). 3. The compressor (12) according to claim 2, characterized in that at least one of the guide wires contained in the first connecting line (26a) is guided in such a way that it crosses the shortest straight line that connects the first terminal (24a) and the inner peripheral wall (20d) ) container (20) in plan view. 4. The compressor (12) according to claim 1, characterized in that each of the first connecting line (26a) and the second connecting line (26b) consists of a plurality of guide wires, wherein the plurality of guide wires are bound by means of a sleeve having a length equal to or shorter than 60% of the length of the shortest guidewire of the set of guidewires. 5. Compressor (12) according to claim 1, characterized in that it further contains: a discharge pipe (22) arranged in a position where it overlaps with the central axis of the container (20) at one axial end of the container (20) for forcing the refrigerant out of the container (20), wherein the first end (24a) and the second end (24b ) are installed in a position that deviates from the central axis of the container (20) at one axial end of the container (20), and -21 CZ 309414 B6 each of the first connecting line (26a) and the second connecting line (26b) consists of a set of guide wires, wherein a set of connecting terminals connected to the motor (40) is arranged at the ends of the set of guide wires, and in a plan view each of the set of connecting terminals of the first connecting line (26a) and the second connecting line (26b) is located within a range of 60° around the center of the discharge pipe (22) relative to the straight line connecting the center of the discharge pipe (22) and the center of the first terminal (24a) and second endings (24b). 6. Refrigeration cycle device (10) comprising a compressor (12) according to any one of claims 1 to 5.