Method for judging insufficient refrigerant of air conditioning system, and air conditioner

Abstract

The invention provides a method for judging insufficient refrigerant of an air conditioning system, and an air conditioner, and belongs to the field of judgment of refrigerant leakage of a frequency conversion air conditioner. In order to solve the problem of an inaccurate determination method of insufficient refrigerant of a current frequency conversion air conditioner, the method comprises the following steps that after a heating mode is started, a compressor runs for a certain time, primary judgments are carried out on whether an inner coil and inner ambient temperature meet a preset difference value within a specified time and whether outer ambient temperature meets a preset value within the specified time, when the preset conditions are met, an inner wind speed is reduced to a presetwind speed, after the preset time, temperature difference judgments of the inner coil and the inner ambient temperature and an outer coil and the outer ambient temperature are carried out again, and if the preset conditions of the temperature difference are still met, insufficient refrigerant of the system is judged; and otherwise, normal operation is restored. Through the difference value of theinner coil and the inner environment temperature, the outer environment temperature, the inner wind speed control and repeated judgment schemes during heating, the characteristic of insufficient refrigerant can be effectively reflected and accurately judged in each use scene of the system.

Description

technical field [0001] The invention relates to the field of judging refrigerant leakage of frequency conversion air conditioners, in particular to a judging method for refrigerant shortage in an air conditioning system and an air conditioner. Background technique [0002] At present, the abnormal operation of the system due to the leakage of the refrigerant of the inverter air conditioner is the most prominent and common problem reported in the after-sales market. When the refrigerant of the air conditioner is insufficient, the system will run abnormally. Not only the heat transfer performance of the system cannot be fully utilized, but also the cooling and heating The effect is poor, and it will also lead to high exhaust temperature, which will cause the system to stop repeatedly due to excessive exhaust, which will aggravate the aging of the compressor lubricating oil, which will greatly shorten the service life of the compressor. The frosting cycle is shortened, which br...

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Problems solved by technology

[0004] The object of the present invention is to provide a method for judging the shortage of refrigerant in an air-conditioning system and an air conditioner, so as to solve the problem that the method for judging the shortage of refrigerant in an inverter air conditioner is inaccurate

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