Air conditioner control method and system under low-temperature and high-humidity heating work condition

Abstract

The invention relates to the technical field of air conditioners, in particular to an air conditioner control method and system under the low-temperature and high-humidity heating work condition and aims at solving the problems that an existing air conditioner is poor in rapid heating effect and poor in lubricating effect, and an outdoor unit is not prone to frosting. To achieve the purpose, the control method comprises the steps that the environment temperature and the environment humidity are obtained; when the environment temperature is smaller than the set temperature and the environment humidity is larger than the set humidity, a compressor is preheated; after preheating is finished, an outer draught fan is started, and the speed is increased to the first target rotation speed; when or before or after the speed of the outer draught fan starts to be increased, the aperture of an expansion valve is adjusted to the first target aperture; when the outer draught fan and / or the expansion valve reach / reaches the set conditions, the compressor is started; and staging continuous frequency increasing of the compressor is conducted according to multiple set speeds. According to the abovemethod, the compressor frequency increasing time can be greatly shortened, the purposes of rapid heating, improving lubricating and delaying frosting are achieved, the comfort of the air conditioneris improved, and the user experience is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a control method and system for an air conditioner under a low-temperature and high-humidity heating condition. Background technique [0002] With the increasing improvement of living standards, people's requirements for the quality of life are also getting higher and higher, and this requirement is particularly evident in household appliances. Taking an air conditioner as an example, in order to meet the user's demand for rapid heating and thus bring a more comfortable user experience, the existing air conditioner generally rapidly upsurges the compressor to a higher frequency when it is just turned on. When the compressor is running, the refrigerant in the compressor will be quickly discharged and circulated in the piping system. During the cycle, the lubricating oil will be discharged from the compressor together with the refrigerant and enter the pipeline. Only when...

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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 in the existing air-conditioning start-up frequency control method, the rapid heating effect is poor due to the long frequency increase time, the compressor lubrication effect is poor when the ambient temperature is low, and the environment In order to solve the problem that the outdoor unit is prone to frosting when the humidity is high, the present invention provides a control method for the air conditioner under the heating condition of low temperature and high humidity. The control method includes the following steps:

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