Control Method of Constant Temperature and Dehumidification of Air Conditioner

Abstract

The invention relates to a constant temperature dehumidification control method of an air conditioner. The method includes a compressor, a condenser, an outdoor fan, an evaporator, an indoor fan and an auxiliary electric heater. The method comprises the steps of A, enabling the air conditioner to enter a constant temperature dehumidification operation mode, starting the compressor and the auxiliary electric heater, and operating air conditioning system by a refrigerating circulating manner; B, detecting the indoor environmental humidity psi 1 through the air conditioner, and determining the difference to the set humidity psi 2; if the difference is not less than psi, entering step C; if the difference is less than psi, entering step D; C, controlling the indoor fan to rotate at medium rotating speed V, and keeping the auxiliary electric heater and the compressor running; D, controlling the indoor fan to run at a low rotating speed V1, and keeping the auxiliary electric heater and the compressor running; E, stopping the compressor when the indoor environmental temperature psi 1 is reduced to reach the set temperature psi 2, and controlling the indoor fan and the auxiliary electric heater to continuously run for a period of time T, and then stopping the air conditioner. The control method is simple; indoor constant temperature can be ensured while dehumidifying; in addition, the dehumidifying capacity can be increased, the power consumption of the air conditioner in dehumidifying can be decreased, and as a result, the operation efficiency of the air conditioner can be improved.

Description

technical field [0001] The invention relates to a method for controlling constant temperature and dehumidification of an air conditioner, and belongs to the technical field of air conditioner control. Background technique [0002] When the air conditioner is in dehumidification operation, the air conditioning system generally adopts the method of running refrigeration to condense the water vapor in the indoor environment and then discharge it. There is no essential difference between refrigeration and dehumidification. This method is not very high in rainy weather but humid. Under normal circumstances, the cooling operation will bring about a decrease in temperature, which will seriously affect the user's comfort. [0003] At present, in order to achieve the purpose of dehumidification without lowering the room temperature, a dehumidification solenoid valve is used on the evaporator of the indoor unit, so that part of the evaporator is used for heating and the other part of ...

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Problems solved by technology

[0002] When the air conditioner is in dehumidification operation, the air conditioning system generally adopts the method of running refrigeration to condense the water vapor in the indoor environment and then discharge it. There is no essential difference between refrigeration and dehumidification. This method is not very high in rainy weather but humid. Under the condition of cooling, the temperature drop caused by running refrigeration will seriously affect the user's comfort.

[0003] At present, in order to achieve the purpose of dehumidification without lowering the room temperature, a dehumidification solenoid valve is used on the evaporator of the indoor unit, so that part of the evaporator is used for heating and the other part of the evaporator is used for cooling, but this method will also bring difficulties. A good evaporator splits the flow, which affects energy efficiency, and because there is only half of the cooling, the dehumidification capacity will be small, and it will consume more power to achieve a certain dehumidification capacity, which will not achieve the goal of high efficiency and energy saving

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