Capacity varying type rotary compressor and refrigeration system having the same

Abstract

A capacity varying type rotary compressor comprises a casing (100) that maintains a discharge pressure state; a motor (200) installed in the casing (100) and generating a driving force; one or more cylinder assembly (300,400) fixed in the casing (100) and compressing a refirgerant by a rolling piston (340,430) and a vane (350,440), the rolling piston (340,430) eccentrically coupled to a rotation shaft (230) of the motor (200) and performing a linear motion; and a vane restricting unit (500) for restricting the vane (440) separated from the rolling piston (430) or releasing the vane (440) thereby contacting to the rolling piston (430) according to a difference of pressures applied to the vane (440). In the rotary compressor, an entire structure is simplified thereby to minimize precessing assemblies, resulting in reducing aproduction cost and enhancing a productivity. Furthermore, as the vane (440) is restricted by using a pressure difference of the system, a relibility is enhanced. Especially, in case of using a stopper (550), the reliability of the product can be more enhanced.

Description

technical field [0001] The present invention relates to a rotary compressor, and more particularly, to a variable displacement type rotary compressor capable of restricting or releasing a vane by applying a suction pressure or a discharge pressure to a side surface of a vane groove. Background technique [0002] An air conditioner is generally used to maintain an indoor space in a comfortable state by maintaining the indoor temperature at a set temperature. The air conditioner includes a cooling system. The refrigeration system includes: a compressor for compressing refrigerant; a condenser for condensing the refrigerant compressed by the compressor and releasing heat to the outside; an expansion valve for reducing the pressure of the refrigerant condensed by the condenser; And the evaporator, which is used to evaporate the refrigerant that has passed through the expansion valve and absorb external heat. [0003] In the refrigeration system, when the compressor is powered ...

AI Technical Summary

Problems solved by technology

But in the former method, the piping system for bypassing the refrigerant to the outside of the cylinder is complicated, thereby increasing the flow resistance of the refrigerant and reducing the cooling efficiency

Also, in the latter method, there are magnets or tension springs used to restrain the vanes in the vane slots, these require complex installation processes

Especially in the case of magnets, metal powder from the compressor or refrigeration system adheres to the blades and damages the bearing surfaces

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