Multistage compression type rotary compressor

Abstract

The invention provides a rotary compressor used to structurally simplify a laminae which divides a cylinder into a low-pressure chamber and a high-pressure chamber. In addition, the invention providesa multi-stage rotary compressor, the manufacturing method thereof and a defrosting device used in a coolant loop. The rotary compressor(10)comprises a first and a second rotary compressing units(32,34) which are driven via an electromotor(14) arranged in a sealed container(12). The first rotary compressing unit(32)is composed of an upper cylinder(38), a swinging piston(110) for a roller(112)whichis connected with an eccentric unit(42)on the rotary shaft(16)of the electromotor(14) and eccentrically moves inside the upper cylinder(38), and a laminae(114) which is molded on the swinging piston(110) and protrudes in the radial direction from the roller(112)to divide the upper cylinder(38)into a low-pressure chamber and a high-pressure chamber. A retaining member is arranged to retain the laminae(114) of the swinging piston(110)in a sliding and swingy mode.

Description

[0001] This application is a divisional application of the patent application filed on August 28, 2002 with the title of "rotary compressor, its manufacturing method, and a box removal device using the compressor" and application number 02142300.8. technical field [0002] The present invention also relates to a multi-stage compression type rotary compressor that sucks refrigerant gas compressed and discharged by the first rotary compression unit to the second rotary compression unit, compresses it, and discharges it. Background technique [0003] Existing rotary compressors such as the internal intermediate pressure type multi-stage compression type suck gas (refrigerant gas) into the low-pressure chamber side of the cylinder from the suction hole of the first rotary compression unit, and compress it by the action of the roller and the vane to become an intermediate compressor. The pressure is discharged from the high-pressure chamber side of the cylinder to the airtight con...

AI Technical Summary

Problems solved by technology

[0025] However, in this case, the discharge side of the first rotary compression unit communicates with the discharge side of the second rotary compression unit, whereby the suction side and the discharge side of the second rotary compression unit are at the same pressure, so there is a possibility that the second rotary compression unit is generated. Unstable operation of the second rotary compression unit, such as blade jumping of the compression unit

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