Constant-temperature dehumidification control method and system of air conditioner

Abstract

The invention belongs to the field of air conditioner control and particularly relates to a constant-temperature dehumidification control method and system which do not need cost increase. Specifically, after a constant-temperature dehumidification function of an air conditioner is started and the temperature set by a user is reached in a heating or refrigeration mode, the dehumidification process is implemented. If in the refrigeration mode, the coil temperature T2 of an indoor heat exchanger is compared with a dew point temperature TL. If the T2 is smaller than or equal to the TL, wind speed and operating frequency are kept constant to perform operation for dehumidification. If the T2 is greater than the TL, the wind speed is controlled to be reduced, and the operating frequency is controlled to be improved so as to perform operation for dehumidification. If in the heating mode, shutdown is continuously kept for second preset time length t2 and then the heating mode is switched to the refrigeration mode, the wind speed is reduced to be at a preset lowest wind gear. Real-time indoor-outdoor temperature different delta T is calculated. The initial operating frequency F0 of a compressor corresponding to the indoor-outdoor temperature different delta T is obtained, and the air conditioner is controlled to operate according to the initial operating frequency F0. Therefore, the indoor constant-temperature effect can be achieved in the dehumidification process, and the comfort demand of the user can be met.

Description

technical field [0001] The invention belongs to the control field of air conditioners, and in particular relates to a constant temperature dehumidification control method and a control system of an air conditioner. Background technique [0002] Under normal circumstances, the air conditioner must also be cooling during the dehumidification operation process. Therefore, when the indoor and outdoor temperature difference is large and the cooling load is large, the dual functions of cooling and dehumidification can be realized through ordinary dehumidification control, but when the indoor and outdoor temperature difference is small and the ambient humidity of the room is high, the cooling load is very large Small, through ordinary dehumidification will cause a rapid drop in room temperature, when the room temperature reaches a low level, users usually feel cold, that is, the air conditioner cannot operate and dehumidify according to the comfortable temperature set by the user. ...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a constant temperature and dehumidification control method and control system for an air conditioner, so as to solve the technical problems of complex design and high cost of existing solutions

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