Control method for rotating speed of outdoor fan of air conditioner, air conditioner and storage medium

Abstract

The invention discloses a control method for the rotating speed of an outdoor fan of an air conditioner, the air conditioner and a storage medium. The method comprises the steps that the pipe temperature of a first inner pipe at the current moment is recorded when the operation of the air conditioner meets a differential pressure condition and the current operation frequency reaches a preset threshold value, and the rotating speed of the outdoor fan of the air conditioner is reduced by one preset value; the pipe temperature of a second inner pipe is recorded after the rotating speed of the outdoor fan of the air conditioner is reduced, and when the difference value between the pipe temperature of the first inner pipe and the pipe temperature of the second inner pipe is larger than or equalto a first preset temperature value, the operating frequency reduced by one preset value is kept unchanged. According to the control method for the rotating speed of the outdoor fan of the air conditioner, the air conditioner and the storage medium, the condensing pressure is increased by reducing the rotating speed of the outdoor fan of the air conditioner, and the pressure difference is increased, so that the refrigerant flow is increased; and the optimal rotating speed value is determined by reducing the pipe temperature of the inner pipes before and after the rotating speed of the outer fan is reduced, and therefore the refrigerating capacity is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a method for controlling the speed of an outdoor fan of an air conditioner, an air conditioner and a storage medium. Background technique [0002] DC inverter air conditioner refers to the air conditioner that adopts DC inverter control system and corresponding DC inverter compressor, which has the strongest energy-saving effect and more accurate temperature control technology. [0003] At present, the speed of most outdoor fans of DC inverter air conditioners is controlled according to the difference between the temperature of the outer coil and the ambient temperature to ensure energy-saving operation of the air conditioner. For example, when 4°C<outer coil temperature-ambient temperature<8°C , the speed of the external fan remains unchanged; when the temperature of the outer coil - ambient temperature < 4 °C, the speed of the external fan is reduced by 1 gear...

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a method for controlling the speed of the outdoor fan of an air conditioner, an air conditioner and a storage medium, aiming at solving the problem of low cooling capacity caused by excessively high speed of the outdoor fan in the prior art, small system pressure difference, and small refrigerant flow rate. The problem of poor cooling effect

Images