Automatic defrosting air conditioning system and control method thereof

Abstract

The invention provides an automatic defrosting air conditioning system and a control method thereof. The automatic defrosting air conditioning system comprises a compressor (5), an indoor heat exchanger (1) and an outdoor heat exchanger (3), wherein a bypass pipeline (7) is arranged on a refrigerant pipeline between the compressor (5) and the indoor heat exchanger (1) in a communicating mode, anda partial segment of the bypass pipeline (7) is arranged at the position of the outdoor heat exchanger (3) so as to exchange heat with at least part of the outdoor heat exchanger (3). According to thesystem and the method, due to the fact that a continuous defrosting function of an air conditioner is achieved through introduction of a refrigerant fluid at a high temperature, an original heating function of the air conditioner is still guaranteed, external energy is not introduced, the defrosting energy efficiency of the air conditioner is higher, the heating effect is better, and the comfortis better; and the effect and energy efficiency of the air conditioner in the heating process are further guaranteed by combining control logic.

Description

Technical field [0001] The invention belongs to the technical field of heating and refrigeration, and specifically relates to an automatic defrosting air conditioning system and a control method thereof. Background technique [0002] At present, when the air conditioner is used for heating in cold and humid areas, frosting may occur outdoors. During long-term operation, frequent frosting and defrosting will eventually affect the heating effect of the air conditioner. In view of the problem of frosting, related scholars have also proposed many defrosting methods, such as refrigerant reverse heat pump cycle defrosting, bypass hot gas defrosting, hot water spray defrosting, and electric hot air defrosting. Among them, the heating pump cycle defrosting is commonly used in heating and cooling air conditioners, but due to the influence of the natural environment and the control logic of the air conditioner, this method will cause the heating effect of the air conditioner to be insigni...

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of poor air conditioning heating effect, low energy efficiency and poor comfort in the defrosting control of the air conditioning system in the prior art, thereby providing an automatic defrosting air conditioning system and its control method

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