Two-stage double-cylinder compressor with high refrigeration performance

Abstract

The invention discloses a two-stage double-cylinder compressor with high refrigeration performance, and the compressor comprises a motor stator, a rotor, a crank shaft, an upper roller, a lower roller, an upper flange, an upper air cylinder, a separation plate, a lower air cylinder, a lower flange, a lower flange cover plate and a liquid distributor, wherein the crank shaft is provided with the upper roller and the lower roller which are matched with the inner cavities of the upper and lower air cylinders to work; the lower flange cover plate covers the lower end of the lower flange to form an air discharging cavity of the lower air cylinder; the upper air cylinder, the separation plate, the lower air cylinder and the lower flange are provided with two-stage compression channels which are communicated with the air discharging cavity of the lower air cylinder; the liquid distributor is provided with an air suction pipe which is respectively communicated with the upper air cylinder and the lower air cylinder; the upper flange, the upper air cylinder, the separation plate, the lower air cylinder and the lower flange are further provided with single-stage compression channels which are communicated with the air discharging cavity of the lower air cylinder; the lower flange is provided with a plunger reversing device for controlling any one of the two-stage compression channels and the single-stage compression channels to be selectively switched on / off so as to realize that the lower air cylinder selectively participates in compression work; and the air suction pipe of the upper air cylinder is further provided with a stop valve for controlling air suction to be switched on / off.

Description

【Technical field】 [0001] The invention relates to a compressor working under various working conditions, in particular to a two-stage double-cylinder compressor with high refrigeration performance. 【Background technique】 [0002] The two-stage compressor increases the compression ratio through two compressions, which is very suitable for low-temperature heating of heat pump water heaters under high-pressure ratio conditions, and is also suitable for high-temperature refrigeration of air conditioners under high-pressure ratio conditions. However, under the rated cooling conditions, the system requires the compressor to have low power consumption and low compression ratio to improve the energy efficiency ratio, but the high pressure ratio generated by the two-stage compression makes the power consumption of the compressor high, which is not good for the rated cooling; on the other hand, the two-stage compression The suction of the second cylinder of the stage compressor is pro...

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Problems solved by technology

However, under the rated cooling conditions, the system requires the compressor to have low power consumption and low compression ratio to improve the energy efficiency ratio, but the high pressure ratio generated by the two-stage compression makes the power consumption of the compressor high, which is not good for the rated cooling; on the other hand, the two-stage compression The suction of the second cylinder of the stage compressor is provided by the exhaust of the first cylinder, and the continuity of the suction (inhalation at 360 degrees) corresponds to the intermittence of the exhaust (only about 120 degrees of exhaust), resulting in the second cylinder's suction Unsaturated, low volumetric efficiency, high power consumption and low energy efficiency ratio in the air conditioning system

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