Compressor and operation control method thereof and air conditioner

Abstract

The invention provides a compressor and an operation control method thereof and an air conditioner. The compressor comprises a first air cylinder (1), a second air cylinder (2) and a switching mechanism; and the volume of the first air cylinder (1) is larger than the volume of the second air cylinder (2), the compressor has a first working state with the first air cylinder (1) as a first-level aircylinder and with the second air cylinder (2) as a second-level air cylinder and a second working state with the second air cylinder (2) as the first-level air cylinder and with the first air cylinder (1) as the second-level air cylinder, and the switching mechanism is used for making the compressor be switched between the first working state and the second working state. According to the compressor, the working states of the air cylinders of the compressor can be adjusted according to working conditions, and the working energy efficiency of the compressor is improved.

Description

technical field [0001] The invention belongs to the technical field of compressors, and in particular relates to a compressor, an operation control method thereof, and an air conditioner. Background technique [0002] In the existing two-stage enthalpy-increasing compressor, generally, the volume of the lower cylinder as the first-stage cylinder is larger than the volume of the upper cylinder as the second-stage cylinder. The compression sequence is that the lower cylinder sucks and compresses air first, and discharges it into the middle cavity. The pressure from the middle pressure of the system The gas refrigerant is replenished into the middle cavity, and then is sucked into the cylinder by the upper cylinder together to complete the compression. As the ambient temperature drops, the specific volume of the refrigerant increases, and the unit suction capacity of the compressor decreases, resulting in a significant drop in the heating capacity of the compressor. In order t...

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Problems solved by technology

However, the current two-stage enthalpy-increasing compressor has a fixed high-low pressure volume ratio design, which has poor adaptability to seasonal temperature changes, so it will greatly reduce the working performance of the rolling rotor compressor.

[0003] The above-mentioned compressors have obvious effects in ultra-low temperature heating and ultra-high temperature cooling, and the two-stage enthalpy-increasing compressor has obvious advantages in low evaporation temperature or high compression ratio conditions, but it is used for ordinary summer mid-temperature cooling or non-ultra-low temperature heating, etc. When the working conditions are not severe, because the pressure ratio is not large, two-stage compression is adopted, and the volume of the back pressure chamber increases, resulting in a decrease in the efficiency of the pump body

In addition, because the first-stage cylinder is much larger than the second-stage cylinder, the pressure in the middle air supply chamber is relatively high, which is not conducive to air supply and has a poor effect on energy efficiency.

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