Three-throttling enthalpy-increasing double-condensing refrigeration system and air conditioner and control method

Abstract

The invention provides a three-throttling enthalpy-increasing double-condensing refrigeration system and an air conditioner and a control method. The refrigeration system comprises a compressor, an evaporator, a first-stage condenser, a second-stage condenser, a first throttling device and a second throttling device, wherein the first-stage condenser is connected with an outlet of the compressor,and an outlet of the first-stage condenser is connected with an inlet of the second-stage condenser; a flash evaporator is further arranged between the second throttling device and the evaporator, aninlet pipeline of the flash evaporator communicates with the second-stage condenser, a liquid outlet pipeline of the flash evaporator communicates with the evaporator, a gas outlet pipeline of the flash evaporator communicates with a fill port of the compressor, and a sixth throttling device is further arranged on the liquid outlet pipeline. Compared with a one-throttling and two-throttling refrigeration cycle system, the three-throttling enthalpy-increasing double-condensing refrigeration system has the advantages that the heating capacity, the refrigerating capacity, the coefficient of heating performance and the coefficient of refrigerating performance of the system are greatly increased.

Description

Technical field [0001] The invention relates to the technical field of air conditioners, in particular to a triple-throttling and enthalpy-increasing double-condensation refrigeration system, an air conditioner and a control method. Background technique [0002] In the prior art, air-conditioning energy consumption accounts for a large proportion of total building energy consumption. How to further improve the air-conditioning performance coefficient and reduce the energy consumption of air-conditioning has become a trend in the air-conditioning industry. The conventional primary throttling refrigeration cycle system has limited evaporating pressure and condensing pressure, the cooling capacity and heating capacity are small, but the compression power consumption is not low, and it is difficult to further improve the coefficient of performance of the system. A throttling refrigeration cycle adopts a throttling. The throttling degree of this circulation method is limited, resultin...

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the air conditioner in the prior art that the heating / cooling performance coefficient of the primary throttling refrigeration cycle system is low, thereby providing a triple throttling enthalpy increasing double-condensing refrigeration system, Air conditioner and control method

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