Secondary throttling double-condensation refrigerating system, air conditioner and control method

Abstract

The invention provides a secondary throttling double-condensation refrigerating system, an air conditioner and a control method. The refrigerating 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; an outlet of thefirst-stage condenser is connected with an inlet of the second-stage condenser; the first throttling device is further arranged on a pipeline between the first-stage condenser and the second-stage condenser; an outlet of the second-stage condenser is connected with the second throttling device; and the other end of the second throttling device is connected with the evaporator. According to the secondary throttling double-condensation refrigerating system, compared with a primary throttling refrigerating circulation system, under the condition of the same evaporation pressure, superheat degree,supercooling degree and refrigerant circulation amount, the second-stage condenser is fully utilized for releasing latent heat and sensible heat of a refrigerant after primary throttling, and the heating capacity, refrigerating capacity, heating performance coefficient and refrigerating performance coefficient of the system are greatly increased.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a secondary throttling double condensation refrigeration system, an air conditioner and a control method. Background technique [0002] In the prior art, the energy consumption of air conditioners accounts for a large proportion of the total energy consumption of buildings. How to further improve the performance coefficient of air conditioners and reduce the energy consumption of air conditioners has become the trend of the air conditioner industry. The conventional throttling refrigeration cycle system has limited evaporation pressure and condensation pressure, small cooling capacity and heating capacity, but not low compression power consumption, and it is difficult to further improve the performance coefficient of the system. One-time throttling refrigeration cycle adopts one-time throttling. The throttling degree of this cycle is limited, so that the evaporation temp...

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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 that the air conditioner in the prior art has a low heating/refrigeration coefficient o

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