rotary compressor

Abstract

The invention relates to a rotary compressor, which can avoid dimension increase of the closed container when reducing the amount of oil discharged out of the closed container through centrifugal separation, and inhibit increase of cost. The rotary compressor (10) is composed of an electric unit (14) contained in a closed container (12), and a rotary compression mechanism (18) driven by a rotating shaft (16) of the electric unit (14), wherein the rotary compression mechanism (18) is provided with an upper cylinder (38), an upper support component (54) and an oil separation device (90) formed on the upper support component (54); the cylinder (38) is provided with a compression chamber for compressing a refrigerant internally; the upper support component (54) seals the compression chamber and is provided with a discharging and silencing chamber (62); the compressed refrigerant in the cylinder (38) is discharged to the discharging and silencing chamber (62); and the oil separation device (90) is used for carrying out centrifugal separation on oil in the refrigerant discharged into the discharging and silencing chamber (62).

Description

Technical field [0001] The present invention relates to a rotary compressor constructed by accommodating an electric unit and a rotary compression mechanism driven by the electric unit in a closed container. Background technique [0002] At present, such compressors have, for example, an internal intermediate pressure type multi-stage (two-stage) compression type rotary compressor having a first and a second rotary compression unit, which is configured to house an electric unit and a rotary compression driven by the electric unit in a closed container. Institutional Department. The refrigerant gas is sucked from the suction port of the first rotary compression unit to the low pressure chamber side of the cylinder, and compressed by the action of the rotor and vanes to become intermediate pressure, and then from the high pressure side of the cylinder through the discharge port and discharged from the muffler chamber to the airtight container Exhaust within. The intermediate pres...

AI Technical Summary

Problems solved by technology

[0008] However, in the prior art in which an oil separation mechanism is provided between the rotary compression mechanism part and the airtight container, at least the radial dimension of the airtight container has to be increased correspondingly.

In addition, since the number of parts constituting the compressor is also significantly increased, there is also a problem of cost increase

[0009] Therefore, instead of providing an oil separation mechanism using centrifugal force between the rotary compression mechanism part and the airtight container, it has been proposed to provide an oil separator on the cover that closes the recess of the support member constituting the discharge muffler chamber of the second rotary compression unit. However, the thickness of the cover that can only ensure a certain strength increases, so that the expansion of the axial dimension of the airtight container becomes a problem, and there is also a horizontal rotary compressor that is not easy but can be compressed in a vertical rotary compressor. The problem that the path of the refrigerant flowing from the discharge muffler chamber to the oil separation mechanism in the cover becomes complicated (for example, refer to the above-mentioned Patent Document 2)

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