JPH1054362A - Horizontal rotary compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compressor of high reliability suppressing its temperature rise and degradation deterioration of lubricating oil, by guiding lubricating oil in a lower part of a closed vessel to a cooling oil pipe so as to return the cooled lubricating oil again to the closed vessel. SOLUTION: A fan 30 is provided in a first delivery pipe 26 utilizing a refrigerant flow in the case of delivering gas to outside a closed vessel 1 from a compression element. By a screw 36 rotated by power of the fan 30, lubricating oil 6 sealed in a lower part in the closed vessel 1 is discharged to its outside, and again returned into the closed vessel 1 after heat exchange. In this way, a temperature rise of the lubricating oil 6 is suppressed, so as to obtain high reliability.

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 for a refrigerator such as a refrigerator.

[0002]

2. Description of the Related Art A conventional horizontal rotary compressor will be described below with reference to the drawings. 5 and 6 show a horizontal rotary compressor disclosed in Japanese Patent Application Laid-Open No. 2-173386, and FIG. 4 shows a refrigeration system to which the horizontal rotary compressor is applied.

[0003] Reference numeral 1 denotes a substantially cylindrical hermetic container which is long in the lateral direction and accommodates an electric element 4 including a stator 2 and a rotor 3 and a compression element 5 driven by the electric element 4. Numeral 6 denotes a lubricating oil, which is formed by closely contacting a main side housing 8 and a sub side housing 9 on both sides of a cylinder 7.
0 is formed. Reference numeral 11 denotes a crankshaft connected to the rotor 3 and has an eccentric portion 11a. Reference numeral 12 denotes a roller fitted to the eccentric portion 11a, which is inscribed in the compression chamber 10. 13
Is a vane, which partitions the compression chamber 10 into a high pressure side and a low pressure side by being pressed against the roller 12 by a spring 14.

[0004] Reference numeral 15 denotes an oil supply pump,
One end of an oil supply pipe 17 in which a coil spring 16 fixed to the lubricating oil 6 is disposed enters the lubricating oil 6.

Reference numeral 18 denotes a discharge valve provided on the sub-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 center of the discharge chamber 19a, is integrated with the discharge cover 19, and is lightly pressed into the convex portion 9a of the sub side housing 9 and fixed.

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

Reference numeral 22 denotes a condenser piped to the discharge pipe 21;
Reference numeral 3 denotes a capillary tube, reference numeral 24 denotes an evaporator, reference numeral 25 denotes a connecting pipe connecting the evaporator 24 and the suction pipe 20, and thus a refrigeration system is constituted.

In the above configuration, the rotation of the rotor 3 is transmitted to the crankshaft 11, and the coil spring 16 fixed to the crankshaft 11 is
The lubricating oil 6 rotates while being maintained in a curved shape by being controlled by an oil supply pipe 17 integrally fixed to the discharge cover 19, and the lubricating oil 6 is sequentially supplied to the crankshaft 11 by the lead of the coil spring 16.

The refrigerant sucked from the suction pipe 20 and compressed in the compression chamber 10 is discharged from the discharge valve 18 provided in the sub-side housing 9 into the discharge chamber 19 a, so that the sound is silenced and sealed from the discharge cover 19. The refrigerant is discharged into the 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 connection pipe 25.

[0010]

However, in the above configuration, when the compressor is operated, heat generated when the refrigerant is compressed is released and accumulated in the closed container, and the temperature in the closed container becomes high. However, in order to promote the deterioration of the lubricating oil, there is a problem that the lubricating oil is deteriorated and the piping is clogged with insoluble substances.

The present invention has been made in view of the above problems, and provides a highly reliable compressor that cools a compression element to lower the temperature of lubricating oil and does not promote deterioration of the lubricating oil.

[0012]

In order to solve the above-mentioned problems, a horizontal rotary compressor according to the present invention comprises a closed container, a lubricating oil sealed in the closed container, an electric element and a compression element, and the compression element. Forming a main side housing, a sub-side housing, a discharge valve provided on the side opposite to the cylinder side of the sub-side housing, a discharge cover fixed to the sub-side housing so as to cover the discharge valve, and fixed to one end of the rotating shaft. In a horizontal rotary compressor having an oil supply pump including a coil spring and an oil supply pipe accommodating the coil spring, a first discharge pipe having a large inlet for introducing gas from the compression element to the outside of the closed vessel, and the first discharge pipe disposed in the closed vessel A suction pipe for sucking the gas to be blown, a fan and a first rotating shaft provided in a first discharge pipe rotating according to the flow rate of the refrigerant, and a bevel gear to conduct rotation vertically. A second rotary shaft, a bearing for supporting the third rotary shaft and the screw for conducting rotation vertically, the second rotary shaft fixed to the discharge cover by the worm gear,
A bearing for supporting the first rotating shaft and the third rotating shaft fixed to the hermetic container, a second discharge pipe for discharging the lubricating oil from the hermetic container, And a return pipe for returning from the

The return pipe described above may be a return pipe for returning lubricating oil to the closed container from the electric element side.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a closed container, a lubricating oil sealed in the closed container, an electric element and a compression element, a main side housing forming the compression element, a sub side housing, and a sub side. Lubrication by a discharge valve provided on the side opposite to the cylinder side of the housing, a discharge cover fixed to the sub-side housing so as to cover the discharge valve, a coil spring fixed to one end of the rotating shaft, and an oil supply pipe containing the coil spring. In a horizontal rotary compressor having a pump, a first discharge pipe having a large inlet for introducing gas from a compression element to the outside of a closed vessel, a suction pipe for sucking gas disposed in the closed vessel, and rotating by a refrigerant flow rate And a first rotating shaft provided on the first discharge pipe to be rotated, a second rotating shaft transmitting the rotation vertically by a bevel gear, and a vertically transmitting rotation by a worm gear. A third rotary shaft and the screw that, a bearing for supporting the second rotary shaft fixed to the discharge cover,
A bearing for supporting the first rotating shaft and the third rotating shaft fixed to the hermetic container, a second discharge pipe for discharging the lubricating oil from the hermetic container, And a return pipe for returning the lubricating oil from the first discharge pipe to the screw by the flow rate of the gas refrigerant discharged out of the closed vessel by the compression action, and transmitting the power to the screw to send the lubricating oil out of the closed vessel. Then, the lubricating oil cooled by the cold oil pipe returns to the closed container again. At this time, the lubricating oil that has been heat-exchanged with the atmosphere outside the closed vessel of the cold oil pipe is cooled.

Further, by providing a return pipe for returning the lubricating oil to the closed container from the electric element side, the first pipe can be compressed by the compression action.
The fan is rotated by the flow rate of the gas refrigerant discharged from the discharge pipe to the outside of the closed container, the power is transmitted to the screw and the lubricating oil is discharged out of the closed container, and the lubricating oil cooled by the cold oil pipe is again returned from the electric element side to the closed container. Come back in. At this time, the lubricating oil that has been heat-exchanged with the atmosphere outside the closed vessel of the cold oil pipe is cooled, and the cooled lubricating oil flows from the non-motorized element side to the motorized element side, so that the entire inside of the closed vessel is cooled. It is.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. Note that the same parts as those in the related art are denoted by the same reference numerals and description thereof is omitted.

(Embodiment 1) An embodiment of the invention according to claim 1 will be described below with reference to FIGS.

26 is a first discharge pipe, and 22 is the first discharge pipe.
A condenser piped to the discharge pipe 26, a capillary tube 23, an evaporator 24, an evaporator 24 and a suction pipe 20
Are connecting pipes. Reference numeral 27 denotes a cold oil pipe connected to the second discharge pipe 28, and reference numerals 29 a and 29 b denote return pipes of the lubricating oil 6 connected to the cold oil pipe 27, thus constituting a refrigeration system.

The refrigerant compressed in the compression chamber is supplied to the discharge cover 19.
From the first discharge pipe 26. Reference numeral 30 denotes a fan that rotates by the flow of the refrigerant, and is connected to the first rotating shaft 31. Reference numeral 32 denotes a bevel gear for transmitting the rotation of the first rotation shaft 31 to the second rotation shaft 33, and reference numeral 34 denotes the second rotation shaft 33.
Is a worm gear that transmits the rotation of the worm to the third rotating shaft 35.
Reference numeral 36 denotes a screw connected to the third rotation shaft 35. 37a is a bearing for supporting the first rotating shaft 31 connected to the closed container 1, 37b is a bearing for supporting the second rotating shaft 33 connected to the discharge cover 19, and 37c is a bearing for supporting the third rotating shaft 31 with the closed container 1. The bearing supports the shaft 35.

The fan 30 is rotated by the refrigerant flow generated when the refrigerant discharged from the discharge cover 19 passes through the first discharge pipe 26 and flows into the condenser 22, and the first rotation connected to the fan 30 is performed. The shaft 31 rotates. The rotation of the first rotation shaft 31 is transmitted vertically to the second rotation shaft 33 via the bevel gear 32, and the rotation of the second rotation shaft 33 is vertically transmitted to the third rotation shaft 35 via the worm gear 34,
The rotation is transmitted to a screw 36 connected to the third rotation shaft 35. By the rotation of the screw 36, the lubricating oil 6 existing in the lower part in the closed vessel 1 flows, is guided from the second discharge pipe 28 to the cold oil pipe 27, exchanges heat, and returns to the return pipe 29a.

As described above, since the lubricating oil 6 is cooled by the cooling oil pipe 27, deterioration and deterioration are suppressed. In addition, since the compressor is constantly cooled during operation, the temperature in the closed vessel 1 can be greatly suppressed, and deterioration of lubricity and generation of non-condensable gas can be suppressed. Life can be extended.

(Embodiment 2) An embodiment of the invention according to claim 2 will be described below with reference to FIGS.

The second embodiment differs from the first embodiment in that the lubricating oil 6 that has been guided from the second discharge pipe 28 to the cold oil pipe 27 and exchanged heat is used.
Is the point returning to the return pipe 29b. That is, in the first embodiment, the return pipe 29a is
The lubricating oil cooled by the cold oil pipe 27 is returned, but the second embodiment is different from the second embodiment in that the lubricating oil 6 returns to the electric element 4 side in the closed casing 1 by the return pipe 29b.

As described above, since the lubricating oil 6 is cooled by the cooling oil pipe 27, deterioration and deterioration are suppressed. In addition, during the operation of the compressor, since the electric element 4 is always cooled, the entire temperature in the closed container 1 can be largely suppressed, and the deterioration of lubricity is suppressed, and the generation of non-condensable gas is prevented. Since the suppression can be suppressed, the life of the compressor can be extended.

[0025]

As described above, according to the present invention, when the lubricating oil passes through the cold oil pipe, it exchanges heat with the atmosphere, and the cooled lubricating oil returns to the closed container, so that the refrigerant is compressed. The heat released at the time can be taken away, and in order to suppress the temperature rise of the lubricating oil enclosed in the closed container, the deterioration of the lubricating oil is suppressed, and the deterioration of the lubricity is also suppressed. Further, the life of the compressor can be prolonged to suppress the decomposition insolubles.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a horizontal rotary compressor according to Embodiments 1 and 2 of the present invention.

FIG. 2 is a diagram illustrating a refrigeration system according to the first embodiment.

FIG. 3 is an explanatory diagram of a refrigeration system according to the second embodiment.

FIG. 4 is an explanatory view of a refrigeration system to which a conventional horizontal rotary compressor is applied.

FIG. 5 is a sectional view of a main part of the horizontal rotary compressor.

FIG. 6 is a sectional view of a principal part of another conventional horizontal rotary compressor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed container 4 Electric element 5 Compression element 6 Lubricating oil 7 Cylinder 8 Main side housing 9 Subside housing 15 Oil supply pump 16 Coil spring 17 Oil supply pipe 18 Discharge valve 19 Discharge cover 20 Suction pipe 26 First discharge pipe 27 Cold oil pipe 28 2 discharge pipe 29a, 29b return pipe 30 fan 31 first rotating shaft 32 bevel gear 33 second rotating shaft 34 worm gear 35 third rotating shaft 36 screw 37a, 37b, 37c bearing

Claims (2)

[Claims] 1. An airtight container, lubricating oil sealed in the airtight container, an electric element and a compression element, a main side housing forming the compression element, a sub side housing, and a side of the sub side housing opposite to the cylinder surface. A horizontal rotation having a discharge valve provided on the side, a discharge cover fixed to the sub-side housing so as to cover the discharge valve, a coil spring fixed to one end of the rotating shaft, and an oil supply pipe containing the coil spring. In the type compressor, a first discharge pipe that guides gas from the compression element to the outside of the closed container, a suction pipe that sucks gas disposed in the closed container, and a first discharge pipe that rotates by a flow rate of the refrigerant are provided. A fan and a first rotating shaft, a second rotating shaft vertically transmitting rotation by a bevel gear, a third rotating shaft and a screw transmitting rotation by a worm gear, A bearing that supports the second rotating shaft fixed to the outlet cover, a bearing that supports the first rotating shaft and the third rotating shaft fixed to the sealed container, a second discharge pipe that discharges lubricating oil from the sealed container, and lubrication. A horizontal rotary compressor having a return pipe for returning oil from a counter-electric element side to a closed vessel via a cold oil pipe. 2. A horizontal rotary compressor according to claim 1, wherein the return pipe returns the lubricating oil to the closed container from the electric element side instead of the return pipe returning the lubricating oil to the closed container from the side of the electric element.