Double-cylinder two-stage compressor and air conditioner system

Abstract

The invention discloses a double-cylinder two-stage compressor and an air conditioner system. The double-cylinder two-stage compressor comprises an air cylinder, a lower flange, a lower flange cover plate, a transfiguration pin, a transfiguration spring, a first sliding piece, a second sliding piece and a filter. The air cylinder is sequentially provided with a first sliding piece groove, a first exhaust opening, a second sliding piece groove and a second exhaust opening communicated with the second sliding piece groove in the peripheral direction. The lower flange is provided with a pin hole and a pressure switching hole. The lower flange cover plate is provided with a gas communication groove for communicating the pin hole and the pressure switching hole. The transfiguration pin is arranged in the pin hole. The transfiguration spring is connected with the lower flange cover plate and the transfiguration pin. The first sliding piece is arranged in the first sliding piece groove. The second sliding piece is arranged in the second sliding piece groove and is provided with a positioning groove for positioning the transfiguration pin and an exhaust matching groove communicated with the second exhaust opening. An outlet of the filter is communicated with the pressure switching hole, a first inlet of the filter is communicated with a flash evaporator air outlet through a first solenoid valve, and a second inlet is communicated with an exhaust pipe through a second solenoid valve. The double-cylinder two-stage compressor achieves switching between larger discharge amount and smaller discharge amount by changing the exhaust opening, and the application range is broadened.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to a double-cylinder two-stage compressor and an air-conditioning system. Background technique [0002] At present, the displacement adjustment of the single-rotor variable capacity compressor is mainly realized by controlling the motor speed and adopting the cylinder unloading method. Among them, the cylinder unloading method to adjust the displacement mainly includes switching between single-cylinder single-stage and double-cylinder single-stage, single-cylinder single-stage Cylinder single-stage and double-cylinder two-stage switching. However, the cylinder unloading method cannot complete the switching of the size and displacement of the two-cylinder two-stage compressor, resulting in a smaller application range of the two-cylinder two-stage compressor. [0003] In addition, the two-cylinder two-stage compressor has a fixed volume ratio. Since the volume ratio corresponding...

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Problems solved by technology

However, the cylinder unloading method cannot complete the switching of the size and displacement of the two-cylinder two-stage compressor, resulting in a smaller application range of the two-cylinder two-stage compressor

[0003] In addition, the two-cylinder two-stage compressor has a fixed volume ratio. Since the volume ratio corresponding to the best energy efficiency of the two-cylinder two-stage compressor in the air conditioner is different under different working conditions, the energy efficiency level of the two-cylinder two-stage compressor is relatively low. Low

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