Refrigerant leakage detection method and device, air conditioner and storage medium

A refrigerant leakage detection device comprising:

• one or more processors configured to:
• acquire an exhaust temperature of an air conditioner at a plurality of moments during a preset time period, in response to the exhaust temperature of the air conditioner being greater than a preset exhaust temperature and a target operating exhaust parameter of the air conditioner exceeding a preset range of the exhaust parameter of refrigerant leakage;
• determine an extreme value of the exhaust temperature and an exhaust moment corresponding to the extreme value of the exhaust temperature of the air conditioner based on the exhaust temperature at the plurality of moments;
• acquire an exhaust period of the air conditioner based on the exhaust moment;
• determine whether there is a refrigerant leakage in the air conditioner based on the exhaust period, by:
• determining that there is a second-level refrigerant leakage in the air conditioner, in response to that the exhaust period of the exhaust temperature is greater than or equal to a preset exhaust period;
• and
• after the determining that there is the second-level refrigerant leakage in the air conditioner, decreasing an operating frequency of a compressor of the air conditioner and increasing an opening of an outdoor electronic expansion valve of the air conditioner.

A refrigerant leakage detection method comprising:

• acquiring an exhaust temperature of an air conditioner at a plurality of moments during a preset time period, in response to the exhaust temperature of the air conditioner being greater than a preset exhaust temperature and a target operating exhaust parameter of the air conditioner exceeding a preset range of the exhaust parameter of refrigerant leakage;
• determining an extreme value of the exhaust temperature and an exhaust moment corresponding to the extreme value of the exhaust temperature of the air conditioner based on the exhaust temperature at the plurality of moments;
• acquiring an exhaust period of the air conditioner based on the exhaust moment;
• determining whether there is the refrigerant leakage in the air conditioner based on the exhaust period, by determining that there is a first-level refrigerant leakage in the air conditioner, in response to that the exhaust period of the exhaust temperature is less than a preset exhaust period;
• and
• after the determining that there is the first-level refrigerant leakage in the air conditioner, controlling the compressor of the air conditioner to stop and outputting a refrigerant leakage prompt message.