JP2009052523A - Hermetic rotary compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein lubricity of a vane and a vane groove is deteriorated when a cast hole of a main bearing at an upper part of the vane groove is eliminated in order to inhibit refrigerating machine oil splashed by the vane sliding in the vane groove of a cylinder from being discharged to the outside of a hermetic vessel together with refrigeration gas during operation of a hermetic rotary compressor. <P>SOLUTION: In this compressor, the cast hole 12 of the main bearing 4 at the vane groove 13 of the cylinder 6 and the upper part thereof are eliminated, a gap is provided between the vane groove 13 and a flange part of the main bearing 4 at the upper part thereof, quantity of the refrigerating machine oil 11 splashed by the vane 8 sliding in the vane groove 13 and discharged to the outside of the hermetic vessel, is suppressed by providing a lead-in groove 15 of refrigerating machine oil 11 to facilitate supply of the refrigerating machine oil 11 to the vane groove 13, and refrigerating machine oil 11 can be supplied to the vane groove from an upper part as indicated in flow 14 of the refrigerating machine oil. Lubricity is secured thereby. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

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

Conventionally, in this type of hermetic rotary compressor, a stator and a rotor constitute an electric mechanism, and a shaft, a main bearing, a sub-bearing, a cylinder, a roller, a vane, and a discharge muffler constitute a compression mechanism. The electric mechanism portion and the compression mechanism portion are housed together with the refrigerator oil in a sealed container. The compression mechanism section has a structure in which the flange portion of the main bearing is fixed to the sealed container by welding (for example, see 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. This also affects performance degradation. If the cast hole of the main bearing at the upper part of the vane groove is eliminated in order to reduce the amount of refrigeration oil released to the outside of the sealed container, the vane and the lubrication of the vane groove are mostly accumulated at 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-described conventional problems, the compressor of the present invention eliminates the cast hole in the flange portion of the main bearing at the vane groove and the upper portion of the main bearing at the upper portion of the vane groove. A gap is provided, and a groove for calling the refrigerating machine oil is further provided so that the refrigerating machine oil is easily supplied to the vane groove.

  Thereby, it is possible to suppress the refrigerating machine oil splashed up by the vane sliding in the vane groove from being released to the outside of the hermetic container, and to supply the refrigerating machine oil to the vane groove from above.

  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.

  According to the first aspect of the present invention, there is no casting hole in the cylinder vane groove and the flange portion of the main bearing above it, and a gap is provided between the vane groove and the flange portion of the main bearing above it. Further, by providing a groove for calling the refrigeration oil in the vane groove, the refrigeration oil splashed up by the vane sliding in the vane groove is suppressed from being released to the outside of the hermetic container, and also from above. By supplying the refrigerating machine oil to the vane groove, the amount of the refrigerating machine oil released from the sealed container can be suppressed and the performance can be improved without reducing the lubricity of the vane groove.

  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.

  As a result, the refrigerating machine oil 11 splashed up by the vane 8 sliding in the vane groove 13 of the cylinder 6 is prevented from being discharged out of the hermetic container 10, and the performance is improved. The refrigerating machine oil 11 is supplied to 13 as shown in the flow 14 of the refrigerating machine oil. Further, by providing the vane groove 13 with a groove 15 for calling the refrigerating machine oil 11, the lubricity can be maintained.

  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.

Compressor sectional view in Embodiment 1 of the present invention The figure which shows the hole shape of the compressor mechanism part in Embodiment 1 of this invention Sectional drawing which shows the flow of the refrigerating machine oil of the 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 12 Cast hole of main bearing 13 Vane groove part of cylinder 14 Flow of refrigerating machine oil 15 Groove ( (Refer to refrigeration oil)

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 This is a hermetic rotary compressor that has no holes in the main bearing flange at the top of the cylinder vane groove, provides sufficient clearance for the refrigerating machine oil to pass between the main bearing and the refrigerating machine oil supplied to the vane groove. A hermetic rotary compressor with grooves to make it easier. 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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