Air conditioning system and control method thereof

Abstract

The invention provides an air conditioning system and a control method thereof. The air conditioning system comprises a compressor, a first indoor heat exchanger, a second indoor heat exchanger and avalve bank structure, wherein through switching control of the valve bank structure, the first indoor heat exchanger communicates with an air suction port of the compressor and the second indoor heatexchanger communicates with the air suction port of the compressor under a refrigeration mode, the first indoor heat exchanger communicates with the air suction port of the compressor and the second indoor heat exchanger communicates with an exhaust port of the compressor under a reheating dehumidification mode, the first indoor heat exchanger and the second indoor heat exchanger are adjacently arranged, and air flow can sequentially flow through the first indoor heat exchanger and the second indoor heat exchanger to complete heat exchange. According to the system, a leeward side heat exchanger can be converted into a reheating heat exchanger under the control of a valve when the system operates in a dehumidification mode during a transition season, so that the air supply temperature whenthe system operates in the dehumidification mode is increased, meanwhile, the condensation temperature is reduced, the supercooling degree of an outlet of a condenser is increased, and the system energy efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an air conditioning system and a control method thereof. Background technique [0002] Existing as attached figure 1 When the conventional refrigeration and air-conditioning system shown is running in summer cooling or dehumidification in transitional seasons, in order to meet the dehumidification demand, it is usually necessary to reduce the evaporating temperature to be lower than the return air dew point temperature and the temperature difference between the two is large. [0003] When the conventional air-conditioning system is dehumidified during the rainy season in the middle and lower reaches of the Yangtze River in China or during the "return to the south" in southern China, the temperature of the air outlet and the indoor temperature will be too low, which will cause the human body to feel uncomfortable. [0004] In addition, the evaporation temperature of the ...

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Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the disadvantages of comfort reduction and low energy efficiency of the system caused by the air-conditioning air outlet temperature and indoor temperature being too low during dehumidification operation of the air-conditioning system in the prior art, thereby providing an air-conditioning system and its control method

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