Control method for air conditioner under heating mode

Abstract

The invention relates to the technical field of air conditioners, in particular to a control method for an air conditioner under a heating mode. The control method aims at solving the problem that anexisting air conditioner control method is poor in universality and bad in user experience. In order to achieve the aim, the control method comprises the steps that the outdoor environment temperatureis obtained; when the outdoor environment temperature is lower or equal to a temperature threshold, according to a fitting formula, the preheating time of an electric heater is calculated; the valveclosing speed of an expansion valve is calculated according to a second fitting formula; the accelerated speed of an external draught fan is calculated according to a third fitting formula; the frequency rising speed of a compressor in the frequency rising stage is calculated according to a fourth fitting formula; the electric heater, the expansion valve and the external draught fan are controlledto move; and when the electric heater and / or the expansion valve and / or the external draught fan meet the set conditions, the compressor is controlled to conduct frequency rising according to the frequency rising speed. The control method for the air conditioner under the heating mode can improve the air conditioner universality, and improves the usage experience of users.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a method for controlling an air conditioner in a heating mode. Background technique [0002] With the improvement of living standards, people have higher and higher requirements for the quality of life, and this requirement is particularly evident in household appliances. Taking an air conditioner as an example, in order to meet the needs of users for rapid heating and thus bring users a comfortable experience, when the existing air conditioner is just turned on, the frequency of the compressor is generally increased to a higher frequency (such as frequency to the maximum operating frequency). In the process of the compressor rapidly rising to high frequency, in order to ensure normal oil return, the compressor is usually forced to continue running at a certain or certain fixed frequency (oil return frequency) for a period of time, and continue to increase the frequency...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problems of poor universality and poor user experience in the existing air-conditioning control methods, the present invention provides a control method for air-conditioning in heating mode. The air conditioner includes a compressor, an expansion valve and an external fan, the compressor is equipped with an electric heater, and the control method includes:

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