Safety control method for conditioner utilizing flammable refrigerants

Abstract

A safety control method for a conditioner utilizing flammable refrigerants comprises the following steps: a detecting the density of the indoor flammable refrigerants by a sensor in the indoor side of the conditioner; b entering into step c when the density of the indoor flammable refrigerants detected by the conditioner is greater than or equals to a warning condition density, and otherwise, the conditioner runs in a user set model continuingly; c starting a warning state, opening an indoor air blower and an outdoor air blower of the conditioner and recycling the flammable refrigerants in the indoor side to the outdoor side; d closing a compressor and a second magnetic valve when the warning time is greater than n minutes or the low-pressure pressure is lower than p MPa; and e closing the indoor air blower and the outdoor air blower of the conditioner when the density of the indoor flammable refrigerants detected by the conditioner is lower than the warning condition density and the warning state is relieved, and entering into step a. The conditioner can recycle the flammable refrigerants in the indoor side to the outdoor side when the situation of refrigerant leaking happens, reduces the leakage rate of the refrigerants in a room to the greatest extent, lowers the risks of flaming in the room and exploding of the compressor, and therefore, ensures the personnel safety of a user to the greatest extent and avoids unnecessary property loss.

Description

technical field [0001] The invention relates to an air conditioner using flammable refrigerant, in particular to a safety control method for an air conditioner using flammable refrigerant. Background technique [0002] The HC-based refrigerants used in recent years, such as R290 and R32, are combustible gases. Therefore, the injection of these refrigerants is dangerous. It is necessary to take necessary measures to ensure the safety of the air conditioner and avoid refrigerant leakage in the air conditioner. cause harm to the human body. Chinese Patent Publication No. CN101737878 disclosed an air conditioner using a flammable refrigerant and its control method on June 16, 2010, including a compressor, a four-way valve, an indoor heat exchanger, a throttling mechanism, and an outdoor heat exchanger The refrigeration / heat pump air-conditioning system composed of two ends of the indoor heat exchanger is respectively equipped with an air-conditioning connection pipe liquid valv...

AI Technical Summary

Problems solved by technology

However, its control of refrigerant leakage is still lacking. Therefore, it is necessary to develop a safety control method for air conditioners using flammable refrigerants to minimize indoor refrigerant leakage and ensure the personal safety of users to the greatest extent.

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