Method for detecting refrigerant leakage of air conditioner and air conditioner using method

Abstract

The invention discloses a method for detecting refrigerant leakage of an air conditioner. The method comprises the steps of determining whether the air conditioner needs the refrigerant leakage detection or not according to the detected outdoor refrigerant concentration of the air conditioner; determining whether the running current of a compressor is reduced or not according to the outdoor temperature and the running current value I of the compressor; simultaneously starting a timer and a counter to work; determining whether the refrigeration effect of the air conditioner is invalid or not; detecting whether a pressure sensor of an exhaust port of the compressor breaks down or not; determining the actually measured saturation temperature corresponding to the average value of the exhaust pressure value according to the average value of the exhaust pressure value, and determining whether the air conditioner has a suspected refrigerant leakage or not according to the actually measured saturation temperature; correcting the refrigerant flow value Q per unit time according to the information stored in a parameter storage space and the running current value of the compressor; and determining whether the flow ratio of the corrected refrigerant flow value per unit time to the actual mass flow is smaller than a preset ratio value or not, and if yes, turning off the air conditioner andkeeping the current rotating speed of a fan. The method has the beneficial effects that (1) the determining accuracy rate of the refrigerant leakage of the air conditioner is higher; and (2) the refrigerant leakage is comprehensively detected, and air exhausting is continuously carried out when the refrigerant leakage is determined.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner refrigerant leakage detection method and an air conditioner using the method. Background technique [0002] With the improvement of people's living standards, the popularity of air conditioners is getting higher and higher. Facing the large-scale popularization of air conditioners, the maintenance of air conditioners has become correspondingly frequent. There are endless problems with various air conditioners on the market. For the refrigerant leakage problem of air conditioners, no reasonable solution has been found. Now there are various leakages in the market, such as welding leakage of the evaporator of the internal unit, leakage of the connecting pipe, leakage of the condenser of the external unit, and four-way valve pipe. Leaks caused by road breaks, etc., once a leak occurs, the user usually finds out and repairs it when the cooling and heating ...

AI Technical Summary

Problems solved by technology

However, the corresponding leak detection method has not been improved accordingly, that is, the method of one-time judgment on a single air-conditioning parameter should not be used for leak detection, but should be judged by comprehensively applying the parameters of various air-conditioning systems to avoid The misjudgment of air-conditioning refrigerant leakage caused the air-conditioning to repeatedly shut down for protection

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