An air-conditioning system with automatic defrosting and its control method

Abstract

The invention provides an automatic defrosting air-conditioning system and a control method thereof, the automatic defrosting air-conditioning system, which includes: a compressor (5), an indoor heat exchanger (1) and an outdoor heat exchanger (3); A bypass pipeline (7) is also communicated with the refrigerant pipeline between the compressor (5) and the indoor heat exchanger (1), and a part of the bypass pipeline (7) is arranged on the The outdoor heat exchanger (3) is positioned so as to exchange heat with at least part of the outdoor heat exchanger (3). Through the present invention, due to the introduction of higher temperature refrigerant fluid, the continuous defrosting function of the air conditioner is realized, so that the original heating function of the air conditioner is still guaranteed, and no external energy is introduced, so that the defrosting energy efficiency is higher and the heating The effect is good, the comfort is better, and combined with the control logic to further ensure the effect and energy efficiency of the air conditioner when heating.

Description

technical field [0001] The invention belongs to the technical field of heating and refrigeration, and in particular 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 a humid and cold area, there will be frosting on the outside. During long-term operation, frequent frosting and defrosting will eventually affect the heating effect of the air conditioner. For the frosting problem, relevant 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, heat 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 itself, this method will cause the heating effect of the air conditioner to be...

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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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