Pump body assembly, variable-capacity compressor and air conditioning system

Abstract

The invention provides a pump body assembly, a variable-capacity compressor and an air conditioning system. The pump body assembly comprises at least two air cylinders and a variable-volume tank (10), at least one of the air cylinders is a variable-volume air cylinder which is provided with a variable-volume sliding sheet, a pneumatic driving cavity (302) is formed in the tail of each variable-volume sliding sheet and communicates with the corresponding variable-volume tank (10) through a ventilation flow path (301), the maximum volume of each pneumatic driving cavity (302) is V1, the minimum value of the effective flow area of the corresponding ventilation flow path (301) is S, and the relationship between S and V1 meets the condition that S / V1 is larger than or equal to 0.02. According to the pump body assembly, the problems that liquid refrigerants are accumulated on the tail portions of the sliding sheets of the pump body assembly, and pressure pulsation of the tail portions of the sliding sheets is large can be effectively solved, abnormal noise of the compressor is avoided, and user experience is improved.

Description

technical field [0001] The present application relates to the technical field of compressors, in particular to a pump body assembly, a variable capacity compressor and an air conditioning system. Background technique [0002] In order to simultaneously meet the energy efficiency requirements of multi-connected air-conditioning systems under low and high loads, variable capacity compressors are more and more widely used in multi-connected air-conditioning systems. Existing variable capacity compressors generally adopt a sliding vane tail sealing structure, which is fed into high pressure or low pressure to realize the work or unloading of the variable capacity cylinder. A variable capacity mechanism is disclosed in the related art. The tail of the variable capacity cylinder slide can be selectively communicated with the suction pipe or exhaust pipe of the compressor, that is, the head of the pin can be connected to high pressure or low pressure, while the tail of the pin is a...

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Problems solved by technology

[0004] Therefore, the technical problem to be solved in this application is to provide a pump body assembly, variable capacity compressor and air-conditioning system, which can effectively solve the problem of liquid refrigerant accumulated at the tail of the slide vane of the pump body assembly, and the pressure pulsation at the tail of the slide vane is large, avoiding compression Abnormal noise in the machine, improve user experience

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