JPH07103143A - Compressor - Google Patents

Abstract

PURPOSE:To check any possible degeneration and deterioration of lubricating oil in cooling this oil of a compressor in use of coolant gas chilled by cooling a part of the coolant gas being compressed by the compressor and discharged out of it in the midway, and then restoring it to the compressor again. CONSTITUTION:When a rotor of a motor-driving element 4 is rotated in a hermetically sealed vessel 1, a coil spring 15 clamped to a crankshaft 1 1 rotates, and thereby lubricating oil 6 is fed to the crankshaft 11 along this lead. On the other hand, coolant gas is inhaled out of an inlet pipe 20 and, after being compressed in a compression space 10 of a compressive element 5, the partial coolant gas is discharged out of a discharge pipe 26 by way of a discharge cover 19. In this case, the residual coolant gas is discharged out of a separate discharge pipe 21 and, after being cooled in the midway, it is put back to the inside of the hermetically sealed vessel 1 from a return pipe 28. In succession, a tip 28a of the return pipe 28 is opposed to a top face of the lubricating oil 6 and opened thereto, thereby spraying the chilled coolant gas to the lubricating oil 6. With this constitution, the lubricating oil 6 is cooled enough, whereby any possible degeneration and deterioration of this oil is checked.

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 / freezer.

[0002]

2. Description of the Related Art A conventional compression will be described below with reference to the drawings. 6 and 7 are shown in JP-A-62-13.
FIG. 5 shows a horizontal rotary compressor shown in Japanese Patent Publication No. 095, 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 has an electric element 4 including a stator 2 and a rotor 3,
A compression element 5 driven by the electric element 4 is housed.

Reference numeral 6 is a lubricating oil, which is stored under the closed container 1. In the compression element 5, the hollow cylinder 7 is sandwiched between the main side housing 8 and the sub side housing 9, and the hollow portion serves as a compression chamber 10. Reference numeral 11 is a crankshaft connected to the rotor 3 and has an eccentric portion 11a. Reference numeral 12 denotes a roller fitted in the eccentric portion 11 a, which is installed inside the compression chamber 10. Reference numeral 13 is a vane, which is pressed against the roller 12 by a spring 14 to partition the compression chamber 10 into high and low pressure sides.

Reference numeral 16 denotes an oil supply pump in which one end of an oil supply pipe 17 is penetrated into the lubricating oil 6 and a coil spring 16 fixed to the crankshaft 11 is arranged inside and the other end is provided with the lubricating oil 6
It is located inside.

Reference numeral 18 is a discharge valve provided in the auxiliary side housing 9. Reference numeral 19 denotes a discharge cover, and the cup-shaped portion of the discharge cover 19 is formed as a discharge chamber 19a. A curved oil supply pipe 17 is fixed to the central portion of the discharge chamber 19a, is integrated with the discharge cover 19, and is lightly press-fitted and fixed to the convex portion 9a of the auxiliary side housing 9.

Reference numeral 20 is a suction pipe which penetrates the closed container 1 and is located above the lubricating oil 6, and is press-fitted into a through hole 9b communicating with the compression chamber 10 of the cylinder 7 provided in the sub-side housing 9. . Reference numeral 21 is a discharge pipe, which penetrates the closed container.

Reference numeral 22 denotes a condenser connected to the discharge pipe 21, 2
Reference numeral 3 is a capillary tube, 24 is an evaporator, and 25 is a connecting pipe for connecting 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 11, and the coil spring 16 fixed to the crankshaft is connected to the auxiliary side housing 9.
Further, the discharge cover 19 and the oil supply pipe 17 fixed integrally rotate to rotate while keeping the curved shape, and the lubricating oil 6 is sequentially supplied to the crankshaft 11 by the lead of the coil spring 16.

The refrigerant sucked through the suction pipe 20 and compressed in the compression chamber 10 is silenced by being discharged into the discharge chamber 19a from the discharge valve 18 provided in the sub-side housing 9. The refrigerant is discharged into the closed container 1, and the refrigerant is sucked into the suction pipe 20 again by the discharge pipe 21, the condenser 22, the capillary tube 23, the evaporator 24, and the connecting pipe 25.

[0011]

However, in the above-mentioned structure, when the compressor is operated, the heat generated when the refrigerant is compressed and the heat generated when the electric element rotates are stored in the closed container. It is discharged and accumulated, and the temperature in the closed container becomes high, which accelerates the deterioration and deterioration of the lubricating oil, which causes problems such as deterioration of lubricity and poor cooling due to generation of non-condensable gas.

In view of the above problems, the present invention provides a highly reliable compressor that cools lubricating oil and does not accelerate deterioration and deterioration of the lubricating oil.

[0013]

In order to solve the above problems, a compressor according to the present invention comprises a closed container, a lubricating oil injected into the closed container, an electric element and a compression element, and a rotation of the compression element. An oil supply pump including a coil spring fixed to one end of a shaft and an oil supply pipe for housing the coil spring, a first discharge pipe for guiding gas from the compression element directly to the outside of the closed container, and further opened to the closed container space. A return pipe and a second discharge pipe for guiding gas to the outside of the closed container,
It comprises a suction pipe arranged in a closed container, and a cold oil pipe which extends the return pipe downward and is opened immediately before the lubricating oil.

Further, the hermetic container, the lubricating oil injected into the hermetic container, the electric element and the compression element, the coil spring fixed to one end of the rotary shaft of the compression element, and the oil supply pipe for accommodating the coil spring. An oil supply pump, a first discharge pipe that guides gas from the compression element directly to the outside of the closed container, a return pipe that opens to the closed container space, and a second discharge pipe that guides gas to the outside of the closed container. A suction pipe arranged in a closed container, and a cold oil pipe which extends downwardly so that the return pipe comes into contact with the lubricating oil and extends upward again to be opened.

Further, the closed container, the lubricating oil injected into the closed container, the electric element and the compression element, the coil spring fixed to one end of the rotary shaft of the compression element, and the oil supply pipe for housing the coil spring. An oil supply pump, a first discharge pipe that guides gas from the compression element directly to the outside of the closed container, a return pipe that opens to the closed container space, and a second discharge pipe that guides gas to the outside of the closed container. A suction pipe arranged in a closed container, and a cold oil pipe which is extended back and opened after returning the return pipe from the lubricating oil and coming into contact with the lubricating oil.

[0016]

According to the present invention, the refrigerant discharged from the first discharge pipe to the outside of the closed container is cooled by the auxiliary condenser and returned to the return pipe by the compression action. At this time, the lubricating oil is cooled by heat exchange in the atmosphere with the cooled refrigerant in the cold oil pipe.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. It should be noted that the same parts as those of the related art are denoted by the same reference numerals and the description thereof will be omitted.

(Embodiment 1) A description will be given with reference to FIGS. 1 and 2. Reference numeral 21 denotes a first discharge pipe, and the refrigerant compressed in the compression chamber 10 flows from the discharge cover 19 to the first discharge pipe 21. Two
Reference numeral 7 denotes an auxiliary condenser in which the refrigerant introduced from the first discharge pipe is cooled by the auxiliary condenser 27 and returned to the return pipe 28. A second discharge pipe 26 penetrates the closed container 1. The refrigerant in the closed container 1 is guided to the outside of the closed container 1. 22 is a condenser connected to the second discharge pipe 26, 23 is a capillary tube, 24 is an evaporator,
Reference numeral 25 is a connecting pipe that connects the evaporator 24 and the suction pipe 20, and constitutes a refrigeration system by the above.

At this time, the refrigerant cooled in the auxiliary condenser 27 returns through the return pipe 28, and the tip 28a of the return pipe 28 is opened to the side of the lubricating oil 6 and the lubricating oil accumulated in the lower portion of the closed container 1 is closed. 6 is sprayed directly to perform heat exchange and cooled.

As described above, since the lubricating oil 6 is cooled by the refrigerant once cooled, deterioration deterioration is suppressed, and since the lubricating oil 6 is always cooled, the temperature in the closed container 1 can be greatly suppressed and the lubricating property is improved. Since deterioration can be suppressed and generation of non-condensable gas can be suppressed, the life of the compressor can be extended.

(Embodiment 2) This will be described with reference to FIGS. 1 and 3. The tip end portion 28b of the return pipe 28, which is guided from the return pipe 28 into the closed container 1, is immersed in the lubricating oil 6 accumulated in the lower part to cause heat exchange, and then the tip end is opened upward.

As described above, since the lubricating oil 6 is cooled by the tip portion 28b of the return pipe 28, deterioration deterioration is suppressed, and since it is always cooled, the temperature in the closed container 1 can be greatly suppressed, Since the deterioration of lubricity and the generation of non-condensable gas can be suppressed, the life of the compressor can be extended.

(Embodiment 3) This will be described with reference to FIGS. 1 and 4. The tip 28c of the return pipe 28 is introduced into the lubricating oil 6 from the portion where the lubricating oil 6 of the closed container 1 is located, and the tip thereof is opened upward.

At this time, the refrigerant cooled in the auxiliary condenser 27 is the lubricating oil 6 accumulated in the lower part of the closed container 1.
After returning from the return pipe 28c provided therein, the return pipe is soaked in water and heat-exchanged, it is extended above the surface of the lubricating oil and opened, and is heat-exchanged with the atmosphere in the closed container 1 to be cooled.

As described above, since the lubricating oil 6 is cooled, deterioration deterioration is suppressed, and since the lubricating oil 6 is always cooled, the temperature in the closed container 1 can be greatly suppressed, deterioration of lubricity is suppressed, and non-condensation is prevented. Since the generation of gas can be suppressed, the life of the compressor can be extended.

[0026]

As described above, according to the present invention, since heat exchange is performed with the atmosphere of the refrigerant and the refrigerant passing through the cold oil pipe, the deterioration of the lubricating oil is suppressed and the deterioration of the lubricity is suppressed. In order to suppress the generation of non-condensable gas,
The life of the compressor and the life of the refrigeration system can be extended.

At this time, since the cold oil pipe is connected, the lubricating oil having a considerably low temperature is also in contact with the compression element, so that the lubricity of the mechanical portion of the compression element can be improved and the amount of wear can be reduced.

[Brief description of drawings]

FIG. 1 is a refrigeration system diagram to which a compressor of the present invention is applied.

FIG. 2 is a sectional view of the compressor according to the first embodiment of the present invention.

FIG. 3 is a sectional view of a compressor according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a compressor according to a third embodiment of the present invention.

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

FIG. 6 is a sectional view of a conventional compressor.

7 is a cross-sectional view of the main parts of the oil supply pump of FIG.

[Explanation of symbols]

 1 Airtight Container 4 Compressive Element 5 Electric Element 6 Lubricating Oil 15 Lubrication Pump 16 Coil Spring 17 Lubrication Pipe 21 Second Discharge Pipe 26 First Discharge Pipe 28 Return Pipe 28a Tip 28b, 28c Tip

Claims (3)

[Claims] 1. A hermetic container, a lubricating oil injected into the hermetic container, an electric element and a compression element provided in the hermetic container, a coil spring fixed to one end of a rotary shaft of the compression element, An oil supply pipe that houses a coil spring, a first discharge pipe that guides gas from the compression element directly to the outside of the closed container, a return pipe that opens to the closed container space, and a second pipe that guides gas to the outside of the closed container. A compressor provided with a discharge pipe, a suction pipe arranged in a closed container, and a cold oil pipe which extends the return pipe downward and is opened immediately before the lubricating oil. 2. A hermetic container, a lubricating oil injected into the hermetic container, an electric element and a compression element provided in the hermetic container, a coil spring fixed to one end of a rotating shaft of the compression element, An oil supply pipe that houses a coil spring, a first discharge pipe that guides gas from the compression element directly to the outside of the closed container, a return pipe that opens to the closed container space, and a second pipe that guides gas to the outside of the closed container. A compressor provided with a discharge pipe, a suction pipe arranged in a closed container, and a cold oil pipe which extends downwardly so as to come into contact with the lubricating oil and extend upward again to be opened. 3. A hermetic container, a lubricating oil injected into the hermetic container, an electric element and a compression element provided in the hermetic container, a coil spring fixed to one end of a rotary shaft of the compression element, An oil supply pipe that houses a coil spring, a first discharge pipe that guides gas from the compression element directly to the outside of the closed container, a return pipe that opens to the closed container space, and a second pipe that guides gas to the outside of the closed container. A compressor provided with a discharge pipe, a suction pipe arranged in a closed container, and a cold oil pipe which is returned from the lubricating oil and brought into contact with the lubricating oil, and then extended upward and opened.