Control method and system for air conditioner under low-temperature low-humidity heating working condition

Abstract

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 low-humidity heating working condition inorder to solve the problems that as for an existing air conditioner turning-on frequency-increasing control method, the rapid heating effect is poor, and the lubricating effect is poor. The control method comprises the steps that the environment temperature and humidity are obtained; when the environment temperature is smaller than the set temperature and the environment humidity is not larger than the set humidity, a compressor is preheated; after preheating is finished, an external draught fan is started and speeded up till a first target rotating speed is achieved; while, before or after the external draught fan begins to be speeded up, the compressor of the air conditioner is started; and the compressor is subjected to staged continuous frequency increasing according to the multiple set speeds. Through the control method, the frequency-increasing time of the compressor can be greatly shortened while normal oil return of the compressor is ensured, the rapid heating and lubricating improving purposes are achieved, the comfort of the air conditioner is improved, and the user experience is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an air conditioning control method and system under low temperature and low humidity heating conditions. 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 a more comfortable experience in winter, the existing air conditioners usually increase the frequency of the compressor to run at a higher frequency when they are first turned on. When the compressor is running, the refrigerant in the compressor will be quickly discharged and circulated in the piping system. During the circulation process, the lubricating oil will be discharged from the compressor together with the refrigerant and enter the pipeline. On...

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 rapid heating effect and poor lubrication effect of the compressor when the ambient temperature is low due to the long up-frequency time in the existing air-conditioning up-frequency control method , the present invention provides a control method of an air conditioner under low-temperature and low-humidity heating conditions, the control method comprising the following steps:

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