JPH0610870A - Horizontal type rotary compressor - Google Patents

Abstract

PURPOSE:To prevent a wearing amount of a shaft from being accelerated due to a short of oil film and decrease of oil viscosity without liquefying a refrigerant in a surface of a suction pipe by constituting the suction pipe not exposed in a closed vessel. CONSTITUTION:A suction pipe 25 is inserted through a closed vessel 24 and press-fitted to a through hole 7b connected to a compression chamber 8 of a cylinder 5 provided in a subside housing 7. By a constition thus provided, at the time of starting, the suction pipe 25 is not brought into contact with a refrigerant in the closed vessel 24 but cooled by a liquefied refrigerant sucked from an evaporator. Accordingly, the refrigerant is not liquefied in a surface of the suction pipe 25. Thus without liquefying the refrigerant in the surface of the suction pipe 25, a wearing amount of a shaft can be prevented from being accelerated due to a short of oil film and decrease of oil viscosity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal rotary compressor used in a freezing device such as a refrigerator and a refrigerator.

[0002]

2. Description of the Related Art A conventional horizontal rotary compressor will be described below with reference to the drawings. 3 and 4 show a horizontal rotary compressor disclosed in Japanese Patent Laid-Open No. 62-13095, and FIG. 5 shows a refrigeration system to which the horizontal rotary compressor is applied. Reference numeral 1 denotes a substantially cylindrical closed container which is long in the lateral direction, and accommodates a motor M consisting of a stator 2 and a rotor 3, and a compression device C driven by this motor M. Reference numeral 4 denotes oil, which is stored below the closed container 1. Reference numeral 5 is a cylinder, 6 is a main side housing, and 7 is a sub side housing, which are closely attached to both sides of the cylinder 5 to form a compression chamber 8. A shaft 9 is connected to the rotor 3 and has an eccentric portion 10. Reference numeral 11 denotes a roller mounted on the eccentric portion 10 and inscribed in the compression chamber 8. Reference numeral 12 denotes a vane, which is pressed against a roller 11 by a spring 13 to partition the compression chamber 8 into a high pressure side and a low pressure side.

Reference numeral 16 is a discharge valve provided in the sub-side housing. Reference numeral 17 denotes a partition plate interposed between the sub-side housing 7 and the cup-shaped discharge cover 17, and the partition plate 17 forms a cup-shaped portion of the discharge cover 17 as a discharge chamber 17a. A curved oil pipe 15 is fixed to the central portion of the discharge chamber 17a, is integrated with the discharge cover 17, and is lightly press-fitted and fixed to the convex portion 7a of the sub-side housing 7. One end of the oil pipe 15 penetrates into the oil 4,
The coil spring 14 fixed to the shaft 9 is arranged inside.

Reference numeral 18 denotes a suction pipe which penetrates the closed container 1 and is located above the oil 4 and which is press-fitted into a through hole 7b communicating with the compression chamber 8 of the cylinder 5 provided in the sub-side housing 7. is there. Reference numeral 20 is a condenser piped to the discharge pipe 19, 21 is a capillary tube, 22 is an evaporator, and 23 is a connecting pipe for connecting the evaporator 22 and the suction pipe 18, which constitutes a refrigeration system. is doing.

In the above structure, the rotation of the rotor 3 is transmitted to the shaft 9, and the coil spring 14 fixed to the shaft 9 is integrally fixed to the auxiliary side housing 7 with the discharge cover 17. The oil 4 is regulated by the oil pipe 15 to rotate while maintaining its curved shape, and the oil 4 is sequentially fed to the shaft 9 by the lead of the coil spring 14.

The refrigerant sucked through the suction pipe 18 and compressed in the compression chamber 8 is discharged from the discharge valve 16 provided in the auxiliary side housing 7 through a small hole (not shown) provided in the partition plate 18 to the discharge chamber -17a. By being discharged into the inside, the sound is silenced and discharged from the discharge cover 17 into the closed container 1, and the refrigerant is returned to the suction pipe by the discharge pipe 19, the condenser 20, the capillary tube 21, the evaporator 22, and the connecting pipe 23. Is inhaled.

[0007]

However, in the above-mentioned structure, when the refrigeration system is controlled to be turned on and off, the liquid refrigerant condensed in the evaporator when it is turned off is sucked into the suction pipe through the connecting pipe at the time of start-up. The pipe is cooled, the refrigerant in the closed container is liquefied on the surface of the suction pipe, and drops into the oil.

The oil dripped with the refrigerant has a low viscosity. Since the oil is supplied to the shaft by the coil spring, the amount of wear of the shaft increases due to the oil film shortage and the decrease in the oil viscosity, resulting in poor starting, large noise and vibration, and There was a problem of leading to poor compression.

In view of the above problems, the present invention does not liquefy the refrigerant on the surface of the suction pipe and supplies oil that does not contain the liquefied refrigerant to prevent the abrasion amount of the shaft from being promoted due to oil film breakage or oil viscosity reduction. A horizontal rotary compressor having high performance is provided.

[0010]

In order to solve the above-mentioned problems, a horizontal rotary compressor of the present invention stores oil in a hermetically sealed container and compresses it with an electric element composed of a stator and a rotor. The compression element includes a shaft having an eccentric portion, a cylinder that forms a compression chamber concentric with the rotation center of the shaft, and a roller that is fitted in the eccentric portion and rolls in the compressor. And a roller for partitioning the compression chamber into a high pressure side and a low pressure side by being pressed against the roller.
And a main side housing on the side of an electric element that seals both side surfaces of the cylinder and pivotally supports the shaft, a sub-side housing on the side of an anti-electricity element, and a side of the sub-side housing opposite the cylinder surface. Discharge valve,
A discharge cover fixed to the sub-side housing so as to cover the discharge valve, and an oil supply pump provided on the opposite motor side of the shaft. The oil supply pump is a coil fixed to one end of the shaft. A spring and an oil pipe that accommodates the coil spring, fixes a support portion on one end, and opens the other end on the oil pipe,
A suction pipe that penetrates the closed container and is press-fitted into the sub-side housing is provided, and the suction pipe is not exposed in the closed container.

[0011]

According to the present invention, since the surface of the suction pipe is not exposed in the closed container, the refrigerant does not liquefy on the surface of the suction pipe, and the abrasion of the shaft is not promoted due to oil film breakage or oil viscosity reduction.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. The same parts as the conventional ones are designated by the same reference numerals and the description thereof will be omitted.

Description will be made with reference to FIGS. 1 and 2. Figure 1
[Fig. 3] is an enlarged cross-sectional view of a compression part in the embodiment of the present invention. Two
Reference numeral 4 denotes a closed container, 24 a locally squeezes the closed container 24 to abut the discharge cover 17, and a suction pipe 25 penetrates the closed container 24, and a compression chamber of the cylinder 5 provided in the sub-side housing 7. It is press-fitted into a through hole 7b leading to the hole 8.

With the above structure, the evaporator 2 is started at the time of starting.
The suction pipe 25 is cooled by the liquid refrigerant sucked from 2, but does not come into contact with the refrigerant in the closed container 24. Therefore, the refrigerant does not liquefy on the surface of the suction pipe 18.

[0015]

As described above, according to the present invention, oil is stored in a closed container, and an electric element composed of a stator and a rotor and a compression element are provided, and the compression element has an eccentric portion. A shaft, a cylinder that forms a compression chamber concentrically with the rotation center of the shaft, and is fitted to the eccentric portion,
A roller that rolls in the compressor, a vane that divides the compression chamber into a high pressure side and a low pressure side by being pressed against the roller, and seals both side surfaces of the cylinder. ,
A main side housing on the electric element side that rotatably supports the shaft, a sub-side housing on the anti-electric element side, a discharge valve provided on the non-cylinder surface side of the sub-side housing, and the sub-valve so as to cover the discharge valve. It is formed of a discharge cover fixed to a side housing and an oil supply pump provided on the side opposite to the motor side of the shaft.
The coil spring fixed to one end of the shaft and the coil spring are housed and supported at one end.
Is provided with an oil pipe having the other end fixed thereto and the other end opening into the oil, and a suction pipe penetrating the hermetically sealed container and press-fitted into the sub-side housing, and the suction pipe is not exposed in the hermetically sealed container. With the configuration, the refrigerant is not liquefied on the surface of the suction pipe, and the abrasion amount of the shaft can be prevented from being promoted due to oil film breakage or oil viscosity reduction.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of a compression unit according to an embodiment of the present invention.

2 is a left side view of the compression element of FIG.

FIG. 3 is a sectional view of a conventional horizontal rotary compressor.

FIG. 4 is an enlarged cross-sectional view of the compression unit in FIG.

FIG. 5 is a refrigeration system diagram to which a horizontal rotary compressor is applied.

[Explanation of symbols]

 4 Oil 5 Cylinder 6 Main Side Housing 7 Sub Side Housing 8 Compression Chamber 9 Shaft 10 Eccentric Part 11 Roller 14 Coil Spring 15 Oil Supply Pipe 17 Discharge Cover 24 Sealed Container 25 Suction Pipe

Claims (1)

[Claims] 1. A hermetically-sealed container for storing oil, comprising an electric element composed of a stator and a rotor, and a compression element, the compression element comprising a shaft having an eccentric portion,
A cylinder that forms a compression chamber concentrically at the center of rotation of the shaft, a roller that is fitted to the eccentric portion, and rolls in the compressor, and the compression by being pressed against the roller. A vane for partitioning the chamber into a high pressure side and a low pressure side, a main side housing on the electric element side that seals both side surfaces of the cylinder, and axially supports the shaft, and a sub side housing on the non-electric power element side, A discharge valve provided on the side opposite to the cylinder surface of the sub-side housing, a discharge cover fixed to the sub-side housing so as to cover the discharge valve, and an oil supply pump provided on the side opposite to the motor of the shaft. The oil supply pump includes a coil spring fixed to one end of the shaft and the coil spring, and a support portion is fixed to one end and the other end is opened in the oil. An oil pipe that, the sealed container through the a suction pipe which is press-fitted to the secondary side housings, horizontal rotary compressor characterized in that it does not expose the suction tube into the closed container.