Variable-frequency compressor and method and device for determining installation position of one-way valve

Abstract

The invention discloses a variable-frequency compressor and a method and a device for determining the installation position of a one-way valve. The variable-frequency compressor comprises a condenser(1), a first expansion valve (2), a flash tank (3), a second expansion valve (4), an evaporator (5), a compressor body (6) and the one-way valve (7), wherein the flash tank (3) is connected with the condenser (1) and the evaporator (5) through the first expansion valve (2) and the second expansion valve (4) respectively; and the compressor body (6) is correspondingly connected with the flash tank(3), the condenser (1) and the evaporator (5), wherein the one-way valve (7) is arranged between the compressor body (6) and the condenser (1). According to the variable-frequency compressor, the one-way valve is additionally arranged on an enthalpy spraying pipe, the problem that the amplitude and the noise of the enthalpy spraying pipe are too large during the variable-frequency operation of anenhanced vapor injection compressor can be effectively solved, the amplitude of the enthalpy spraying pipe is effectively reduced, and the generated noise is reduced.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to a variable frequency compressor and a method and device for determining the installation position of a check valve. Background technique [0002] With the improvement of living standards, people's requirements for household air conditioners are also getting higher and higher. For example, household air conditioners are required to not only provide strong cooling at high temperatures and strong heating at low temperatures, but also save energy and reduce noise. [0003] The current application method of the air-jet enthalpy-increasing compressor is to pass a part of the condensed liquid refrigerant through the flasher and return to the compressor at low temperature to increase the displacement of the compressor. On the one hand, it prevents the compressor from shutting down at low temperature. On the other hand, the performance of the system is improved, but when the system i...

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Problems solved by technology

[0005] The embodiment of the present invention provides a frequency conversion compressor and a method and device for determining the installation position of the one-way valve. By adding a one-way valve to the enthalpy injection tube, it can effectively solve the problem of excessive amplitude of the enthalpy injection tube when the air injection enthalpy increase compressor is operated at a variable frequency. The problem

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