Air conditioner control method and device

Abstract

The invention discloses an air conditioner control method. The method includes the steps: when an air conditioner operates for a first preset time, controlling an electronic expansion valve to operate with opening B, and starting to detect indoor return air temperature T1 of the air conditioner in real time; according to an operation mode of the air conditioner, calculating a difference between the indoor return air temperature T1 detected in real time and target temperature Ts; in a refrigeration mode, enabling Delta T=T1-TS, and in a heating mode, enabling Delta T=Ts-T1; judging when the Delta T is within a range of [Tb, Ta], controlling the opening of the electronic expansion valve to be correspondingly regulated within a preset range value [B, C] according to changes of the indoor return air temperature detected in real time. The invention further discloses an air conditioner control device. By the method and device, the problem that a compressor of a fixed frequency air conditioner starts and stops frequently is solved, stepless regulation of refrigerating capacity or heating capacity is solved, and temperature fluctuation of a room with a variable frequency air conditioner is reduced.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner control method and device. Background technique [0002] In the prior art, since the inverter air-conditioning system uses an inverter compressor, its control method is to control the temperature by changing the frequency of the inverter compressor according to the relationship between the ambient temperature and the set temperature; The fixed-frequency compressor is used, and its control method is to realize temperature control by starting and stopping according to the relationship between the ambient temperature and the set temperature. [0003] Compared with inverter air conditioners, fixed-frequency air conditioners have the following disadvantages in terms of temperature control: because the frequency of fixed-frequency compressors is not variable, the temperature of the room rises or cools slowly at the beginning of the start-up of the air condit...

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Problems solved by technology

[0003] Compared with inverter air conditioners, fixed-frequency air conditioners have the following disadvantages in terms of temperature control: because the frequency of fixed-frequency compressors is not variable, the temperature of the room rises or cools slowly at the beginning of the start-up of the air conditioner; The room temperature fluctuates greatly, and the user's comfort is poor. At the same time, the service life of the compressor is affected due to the frequent start and stop of the compressor.

[0004] Although the inverter air conditioner can change the cooling capacity or heating capacity by adjusting the frequency of the compressor, if the low frequency of the compressor is not low enough, the adjustable range of cooling capacity or heating capacity is not wide enough, and room temperature fluctuations still exist

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