JP2009030465A - Hermetic rotary compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that refrigerant oil splashed by a vane slid in a vane groove of a cylinder is released together with refrigerant gas to the outside of a closed vessel, in operation of a hermetic type rotary compressor, and lubrication of the vane and the vane groove depends on the refrigerant oil accumulated in a lower part of the sealed vessel and the lubricity is deteriorated if a casting hole of a main bearing of an upper part of the vane groove is eliminated to suppress a release amount of the refrigerant oil. <P>SOLUTION: In this compressor, cast holes 12 of the vane groove 13 of the cylinder 6 and the main bearing 4 disposed on the groove 13 are eliminated, and a clearance is formed between the vane groove 13 and a flange part of the main bearing 4 disposed on the groove 13. Therefore, the amount of the refrigerant oil 11 splashed by the vane 8 slid in the vane groove 13 and released to the outside of the closed vessel 10 is suppressed, and the refrigerant oil 11 is supplied to the vane groove from the above, as shown in a refrigerant oil flow 14, and the lubricity is secured. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to hermetic rotary compression, and more particularly to a compressor that achieves both maintenance of lubricity of a cylinder vane groove portion while improving performance.

Conventionally, this type of hermetic rotary compressor is composed of a stator 1 and a rotor 2, both of which constitute an electric mechanism. The shaft 3, the main bearing 4, the auxiliary bearing 5, the cylinder 6, the roller 7, the vane 8, and the discharge muffler 9 form a compression mechanism. The airtight container 10 and the refrigerating machine oil 11. And the compression mechanism part has the structure where the flange part of the main bearing 4 is fixed to the airtight container 10 by welding (for example, refer patent document 1).
JP 62-10494 A

  However, in the above prior art, when the hermetic rotary compressor is operated, the refrigerating machine oil splashed by the vane sliding in the vane groove of the cylinder passes through the flange hole in the main bearing above the vane groove, and is sealed. This leads to an increase in refrigerating machine oil released together with the refrigerant gas outside the container. And it also affects the performance degradation. If the cast hole of the main bearing at the upper part of the vane groove is eliminated to reduce the amount of refrigeration oil released, the lubrication of the vane and the vane groove almost depends on the refrigeration oil accumulated in the lower part of the sealed container. However, when the oil level of the refrigerating machine oil is lowered from the lower end of the cylinder, there is a problem that the lubricity of the vane and the vane groove is lowered.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a compressor that improves the performance while maintaining the lubricity of the vane groove.

  In order to solve the above-mentioned conventional problems, the compressor of the present invention eliminates the vane groove of the cylinder and the cast hole of the flange portion of the main bearing above the cylinder. Further, a gap is provided between the vane groove and the flange portion of the main bearing above the vane groove.

  As a result, the refrigerating machine oil splashed up by the vane sliding in the vane groove is prevented from being released out of the hermetic container, and the refrigerating machine oil is also shown in the flow of the refrigerating machine oil into the vane groove from above. Can be supplied to.

  As described above, the compressor of the present invention can improve the performance by suppressing the amount of refrigerating machine oil released from the sealed container without reducing the lubricity of the vane groove of the cylinder.

  The first invention eliminates the cast hole in the cylinder vane groove and the flange portion of the upper main bearing, and provides a gap between the vane groove and the upper flange portion of the main bearing, thereby sliding the vane groove. By suppressing the refrigerating machine oil splashed up by the moving vane from being released to the outside of the hermetic container and supplying the refrigerating machine oil to the vane groove also from the top as shown in the flow of the refrigerating machine oil, the vane Without reducing the lubricity of the groove, the amount of refrigerating machine oil released from the sealed container can be suppressed, and the performance can be improved.

  In particular, the second invention is to make the refrigerant of the first invention an alternative refrigerant that does not contain chlorine.

  In particular, the third invention is to make the refrigerant of the first invention a natural refrigerant such as carbon dioxide.

(Embodiment 1)
1, 2, and 3 show a compression mechanism portion of a compressor according to the first embodiment of the present invention.

  In FIG. 1, the same reference numerals are used for the same mechanism elements as in FIGS.

  In FIG. 1, the stator 1 and the rotor 2 constitute an electric mechanism unit. The shaft 3, the main bearing 4, the auxiliary bearing 5, the cylinder 6, the roller 7, the vane 8, and the discharge muffler 9 form a compression mechanism. The shaft 3 transmits the power from the electric mechanism to the compression mechanism, the roller 7 performs rotational compression, and the vane 8 partitions the space of the cylinder 6 into a low pressure chamber and a high pressure chamber. The electric mechanism and the compression mechanism are hermetically sealed by the hermetic container 10.

  Thereby, the refrigerating machine oil 11 splashed up by the vane 8 that slides in the vane groove 13 of the cylinder 6 is prevented from being discharged out of the sealed container 10, and the performance is improved. Lubricity can be maintained by supplying the refrigerating machine oil 11 to the vane groove as shown in the flow 14 of the refrigerating machine oil.

  As described above, the compressor according to the present invention can be applied not only to a refrigeration air conditioner but also to a dehumidifier or a heat pump water heater.

Sectional drawing of the compressor in Embodiment 1 of this invention The figure which shows the hole shape of the compressor in Embodiment 1 of this invention Sectional drawing of cylinder vane groove part vicinity of the compressor in Embodiment 1 of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stator 2 Rotor 3 Shaft 4 Main bearing 5 Sub bearing 6 Cylinder 7 Roller 8 Vane 9 Discharge muffler chamber 10 Sealed container 11 Refrigerating machine oil 13 Vane groove part 14 Cylinder flow 14

Claims (3)

An electric mechanism portion and a compression mechanism portion are housed in a sealed container, and the compression mechanism portion includes a cylindrical cylinder, a main bearing and a secondary bearing that constitute a compression chamber in the cylindrical cylinder, a roller that revolves in the compression chamber, and the Components comprising a shaft coupled with the electric mechanism that gives a revolving motion to a roller and a cylindrical inner peripheral surface of the cylinder into a plurality of sealed spaces, and a discharge muffler attached to the main bearing and the sub-bearing A hermetic rotary compressor having a hole in the main bearing flange at the upper part of the cylinder vane groove and a sufficient clearance through which refrigeration oil passes. The hermetic rotary compressor according to claim 1, wherein the gas to be compressed is an alternative refrigerant not containing chlorine. The hermetic rotary compressor according to claim 1, wherein the gas to be compressed is a natural refrigerant such as carbon dioxide.

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