Air conditioner and dehumidification control method thereof

Abstract

The invention provides an air conditioner and a dehumidification control method thereof. The dehumidification control method of the air conditioner comprises the steps that in a dehumidification mode,the environment dew point temperature is calculated according to the environment temperature and the environment humidity, and a first target threshold value temperature range is determined; the first opening degree of an electronic expansion valve is determined according to the coil pipe detection temperature of an indoor heat exchanger of the air conditioner; the second opening degree of the electronic expansion valve is determined according to the exhaust outlet temperature of a compressor of the air conditioner; and the opening degree of the electronic expansion valve is adjusted to be the small one in the first opening degree and the second opening degree. The environment dew point temperature changes along with changes of the environment temperature and the environment humidity, therefore, it is guaranteed that the coil pipe temperature of the indoor heat exchanger is kept within the target threshold value temperature range, the condition that the coil pipe temperature of the indoor heat exchanger is too high is avoided, and then the condition that water steam in indoor air can not be condensed into water is avoided; and meanwhile, influences of the exhaust outlet temperature of the compressor on the opening degree of the electronic expansion valve are avoided, therefore, the dehumidification effect is guaranteed, and the dehumidification speed is increased.

Description

Technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner and a dehumidification control method thereof. Background technique [0002] At present, when the air conditioner is dehumidifying, the ambient dew point temperature of the indoor heat exchanger of the air conditioner is not fixed. Especially when the air conditioner is dehumidifying, the ambient temperature and humidity of the indoor environment are changing. At this time, the ambient dew point temperature It will change with the process of dehumidification operation, and the evaporation temperature of the indoor heat exchanger will also change with the operating parameters of the indoor and outdoor and air conditioners. When the evaporation temperature of the indoor heat exchanger is higher than the indoor environment dew point temperature, It will greatly reduce the speed of the dehumidification process and affect the dehumidification effect. Summary of...

AI Technical Summary

Problems solved by technology

[0002] At present, when the air conditioner is running in dehumidification, the ambient dew point temperature of the indoor heat exchanger of the air conditioner is not fixed, especially when the air conditioner is running in dehumidification, the ambient temperature and humidity of the indoor environment are changing. It will change with the process of dehumidification operation, and the evaporation temperature of the indoor heat exchanger will also change with the indoor and outdoor and the operating parameters of the air conditioner. When the evaporation temperature of the indoor heat exchanger is higher than the dew point temperature of the indoor environment, It will greatly reduce the speed of the dehumidification process and affect the dehumidification effect

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