JPH08121371A - Compressor - Google Patents

Abstract

PURPOSE: To improve the lubrication efficiency of a compressor and to prevent wear of a machine part due to breakage of an oil film and lowering of viscosity of oil. CONSTITUTION: Throughout a portion extending from the tip of an auxiliary side housing 9 to a rotor 3, the interior of a crankshaft 14 is formed in a hollow state. The rear end of the hollow part 14a is released in a closed container 1 and a helical groove 14b is formed in the wall surface of the hollow part 14a. Thus, the temperatures of the compression chamber and the rotor are lowered through convection occasioned by rotation of the crankshaft.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor used in a refrigerating device such as a refrigerator and an air conditioner, in which an electric motor and a compression mechanism are sealed in a container.

[0002]

2. Description of the Related Art A conventional compressor will be described below with reference to the drawings. 3 and 4 are cross-sectional views of a horizontal rotary compressor disclosed in Japanese Patent Laid-Open No. 62-13095, and FIG. 5 is a piping diagram of a refrigeration system to which the horizontal rotary compressor is applied.

In the figure, reference numeral 1 denotes a substantially cylindrical closed container which is long in the lateral direction, and accommodates an electric element 4 composed of a stator 2 and a rotor 3, and a compression element 5 driven by the electric element 4. Lubricating oil 6 is accumulated below the closed container 1.

The compression element 5 includes a cylinder 7 and a cylinder 7.
A compression chamber 10 is formed by a main side housing 8 and a sub side housing 9 which are in close contact with both sides of the compression chamber 10. Reference numeral 14 is a crankshaft connected to the rotor 3, and has an eccentric portion 15. Reference numeral 11 denotes a roller fitted in the eccentric portion 15, which is a compression chamber 1
Inscribed in 0. Reference numeral 12 denotes a vane, which is pressed against the roller 11 by a spring 13 to partition the compression chamber 10 into a high pressure side and a low pressure side.

Reference numeral 18 is an oil supply pipe, one end of which enters the oil 6 and is internally fixed to the crankshaft 14 by the coil spring 1
9 are arranged. Reference numeral 20 is a discharge valve provided in the auxiliary side housing 9. A discharge cover 17 is formed as a cup-shaped discharge chamber 16 of the discharge cover 17. A curved oil supply pipe 18 is fixed to the central portion of the discharge chamber 16 and is integrated with the discharge cover 17, and is lightly press-fitted and fixed to the convex portion 9a of the auxiliary side housing 9. 21 penetrates the closed container 1 and is located above the oil 6,
The suction pipe is press-fitted into a through hole 17 a communicating with the compression chamber 10 of the cylinder 7 provided in the sub-side housing 9.

Reference numeral 23 denotes a condenser connected to the discharge pipe 22, and 2
Reference numeral 4 is a capillary tube, 25 is an evaporator, and 26 is a connecting pipe that connects the evaporator 24 and the suction pipe 20. The refrigerating system is constituted by the above.

In the above structure, the rotation of the rotor 3 is transmitted to the crankshaft 14, and the coil spring 19 fixed to the crankshaft 14 is fixed to the auxiliary side housing 9 integrally with the discharge cover 16 to provide the oil supply pipe. The oil 6 is rotated while being kept in a curved shape by being regulated by 18, and the oil 6 is sequentially transferred to the crankshaft 14 by the lead of the coil spring 19.
To be refueled. The refrigerant sucked through the suction pipe 21 and compressed in the compression chamber 10 is silenced by being discharged into the discharge chamber 16a from the discharge valve 20 provided in the sub-side housing 9, and is then silenced by the discharge cover 17 in the closed container 1. Then, the refrigerant is sucked into the suction pipe 21 again by the discharge pipe 22, the condenser 23, the capillary tube 24, the evaporator 25, and the connecting pipe 26.

[0008]

However, in the conventional compressor, the temperature inside the compression chamber 10 becomes high, so that the viscosity of the lubricating oil is lowered and the mechanical part wear is accelerated. The present invention solves the conventional problems, and an object thereof is to lower the temperature in the compression chamber and prevent the mechanical portion from being worn.

[0009]

In order to achieve the above object, the compressor of the present invention has a structure in which the crankshaft is hollow from the tip of the auxiliary side housing to the rotor so that the inside of the crankshaft is hollow. It is opened in a closed container.

Also, in the compressor of the present invention, a spiral groove is provided on the wall surface of the hollow portion of the crank shaft from the tip of the auxiliary side housing to the rotor, and the rear end of the spiral groove is opened in the closed container. It was done.

In the compressor of the present invention, the crankshaft is extended from the tip of the sub-side housing to the rotor and spiral blades are provided on the wall surface of the hollow portion of the crankshaft, and the rear ends of the spiral blades are opened in a closed container. Is.

[0012]

According to the present invention, the heat generated in the compression chamber and the rotor is released to the closed container by the spiral groove provided on the wall surface of the hollow portion of the crankshaft, so that the heat exchange is accelerated and the temperatures of the compression chamber and the rotor are increased. By lowering the oil viscosity, the decrease in oil viscosity is suppressed and the wear of machine parts is prevented.

Further, according to the present invention, the heat generated in the compression chamber and the rotor is released to the closed container by the spiral blades provided on the wall surface of the hollow portion of the crankshaft, so that the heat exchange is promoted and the compression chamber and the rotor are accelerated. By lowering the temperature of, the decrease in oil viscosity is suppressed and the wear of mechanical parts is prevented.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A first embodiment of the present invention will be described below with reference to FIG. The same components as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is an enlarged sectional view of the essential parts of the first embodiment of the present invention. In the present embodiment, a crankshaft 14 having a hollow portion 14a whose rear end is open inside the closed container 1 from the front end of the auxiliary side housing 9 to the rotor 3 and a spiral groove 14b is formed on the wall surface of the hollow portion 14a is provided. The spiral groove 14 provided on the wall surface of the hollow portion 14a is used.
The heat generated in the compression chamber 10 and the rotor 3 by b is released to the closed container 1 by the rotational movement of the crankshaft. With the above configuration, the temperatures of the compression chamber 10 and the rotor 3 can be lowered by forced convection.

A second embodiment of the present invention will be described with reference to FIG. The same components as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted. FIG. 2 is an enlarged cross-sectional view of the essential parts of one embodiment of the present invention. In the present embodiment, a hollow portion 14a having a rear end that opens from the front end of the auxiliary side housing 9 to the rotor 3 inside the closed container 1 is provided, and the crankshaft 14 in which a spiral blade 14c is formed on the wall surface of the hollow portion 14a is provided. The spiral blades 14c provided on the wall surface of the hollow portion 14a release the heat generated in the compression chamber 10 and the rotor 3 to the closed container 1 by the rotational movement of the crankshaft. With the above configuration, the temperatures of the compression chamber 10 and the rotor 3 can be lowered by forced convection.

[0017]

As described above, according to the present invention, there is provided a crankshaft in which a hollow portion having a rear end opened from the front end to the rotor of the auxiliary side housing into the closed container is provided and a spiral groove is formed on the wall surface of the hollow portion. Since it is used, the temperature of the compression chamber and the rotor is lowered by the convection caused by the rotational movement of the crankshaft, the decrease in the viscosity of the oil is suppressed, and the wear of the mechanical portion is not promoted.

Further, a spiral blade is provided instead of the spiral groove, and the temperature of the compression chamber and the rotor is lowered by the forced convection caused by the rotational movement of the crankshaft, and the decrease in the viscosity of the oil is suppressed to promote the wear of the mechanical part. Do not let

[Brief description of drawings]

FIG. 1 is a sectional view of a compressor showing a first embodiment of the present invention.

FIG. 2 is a sectional view of a compressor showing a second embodiment of the present invention.

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

FIG. 4 is a vertical sectional view of the conventional compressor.

FIG. 5 is a piping diagram of a refrigeration system to which the conventional compressor is applied.

[Explanation of symbols]

 1 Airtight Container 3 Rotor 4 Electric Element 5 Compression Element 9 Secondary Side Housing 14 Crank Shaft 14a Hollow Part 14b Groove 14c Blade

Claims (2)

[Claims] 1. A hermetically sealed container, an electric element housed in the hermetically sealed container, a compression element, lubricating oil accumulated at the bottom of the hermetically sealed container, and lubricating oil for supplying the lubricating oil to a rotating portion of the compression element. The refueling device comprises a refueling device, one of which is located in the lubricating oil and the other of which is attached to the sub-side housing of the compression element, and a refueling device which is provided in the refueling pipe and extends from the tip of the sub-side housing to the rotor. A compressor comprising: a crankshaft having a hollow portion whose end is open in a closed container and a spiral groove formed on a wall surface of the hollow portion. 2. An airtight container, an electric element housed in the airtight container, a compression element, lubricating oil accumulated at the bottom of the airtight container, and lubricating oil for supplying the lubricating oil to the rotating portion of the compression element. The refueling device comprises a refueling device, one of which is located in the lubricating oil and the other of which is attached to the sub-side housing of the compression element, and a refueling device which is provided in the refueling pipe and extends from the tip of the sub-side housing to the rotor. A compressor comprising a hollow shaft with an open end having a hollow inside and a spiral shaft provided on the wall surface of the hollow part.