Control device and method of variable capacity compressor, variable capacity compressor and air conditioner

Abstract

The invention provides a control device and method of a variable capacity compressor, the variable capacity compressor and an air conditioner. The variable capacity compressor comprises a pin arrangedin a pin hole and provided with a first elastic element opposite to the tail part of the pin, a detection unit used for detecting the magnitude of the extrusion force value of a sliding sheet to thepin, a judging unit used for judging whether the extrusion force of the sliding sheet to the pin is within the elastic threshold value of the first elastic element, and a control unit used for controlling the injection of high-pressure refrigerant, low-pressure refrigerant or mixed refrigerant into a variable-volume hole at the tail part of the sliding sheet according to the judgment result of thejudging unit. According to the control device and method of the variable capacity compressor, the variable capacity compressor and the air conditioner, the variable capacity control can be realized,it is effectively ensured that the refrigerant does not leak, and the control reliability and safety of the variable capacity compressor are improved.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to a control device of a variable capacity compressor and a method thereof, a variable capacity compressor and an air conditioner. Background technique [0002] At present, variable capacity technology is widely used in rotary compressors. The variable capacity operation mode of the rotor compressor mainly controls whether the pin locks the sliding plate by controlling the pressure difference between the two ends of the pin, so as to realize the variable capacity operation of the compressor. Its implementation method is: by introducing different pressures (exhaust pressure or suction pressure) to both ends of the pin to change the pressure difference between the two ends of the pin to control the locking and unlocking movement of the pin on the slide, so as to control whether the slide is attached or not. The tight roller moves to control the working state of t...

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of pressure leakage on both sides of the pin in the compressor variable capacity structure in the prior art, thereby providing a control device for a variable capacity compressor and its method, a variable capacity compressor and an air conditioner. device

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