Enthalpy-spraying compressor air conditioner system and control method thereof

Abstract

The invention provides an enthalpy-spraying compressor air conditioner system and a control method thereof. The enthalpy-spraying compressor air conditioner system comprises a compressor (1), an outdoor heat exchanger (2), an indoor heat exchanger and an enthalpy increasing device arranged between the outdoor heat exchanger (2) and the indoor heat exchanger. The enthalpy increasing device comprises a supercooling device (3) and a first control valve (4), and further comprises an enthalpy-spraying pipeline (5) with one end connected to the compressor (1) and the other end connected to the gas outlet end of the enthalpy increasing device. A second control valve (6) is arranged on the enthalpy-spraying pipeline (5). By adoption of the enthalpy-spraying compressor air conditioner system and the control method thereof, control over pressure of the two-stage enthalpy-spraying pipeline can be achieved, the enthalpy-spraying pressure of the enthalpy-spraying compressor air conditioner system can be effectively and accurately controlled, the gas supplementing pressure is controlled to be close to an optimal gas supplementing pressure point as much as possible, it is guaranteed that the compressor is in the full compression state as much as possible, the situation that over compression or insufficient compression of the compressor is caused when the gas supplementing pressure is too high or too low is avoided, and therefore the heating capacity and energy efficiency of the enthalpy-spraying compressor air conditioner system are improved.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to an air conditioning system of an enthalpy injection compressor and a control method thereof. Background technique [0002] The patent No. CN103822418A in the prior art discloses a quasi-two-stage compression heat pump system and its control method, but this control method uses the degree of superheat to control the injection enthalpy pressure, and the control of the injection enthalpy pressure is not accurate enough . [0003] Because the air conditioner in the prior art cannot control the enthalpy injection air supply pressure or the control is inaccurate, resulting in excessively high or too low air supply pressure resulting in over-compression and under-compression of the compressor, which reduces the energy efficiency and heating of the system capacity and other technical issues, so the present invention researches and designs an enthalpy-injecting compr...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the energy efficiency of the air-conditioning system in the prior art is reduced during the enthalpy injection process, thereby providing an enthalpy-injection compressor air-conditioning system and its control method

Images