Method for judging refrigerant leakage state, refrigerant leakage state judging device and refrigerant leakage state monitoring system

摘要

Problem to be solved: to provide a refrigerant leakage state determining method capable of determining a leakage state including a degree of leakage, while a normal operation is continued without restriction of the operating state in the heat pump apparatus having a refrigerant circulating passage for circulating refrigerant, and a refrigerant leakage state judging device capable of executing the judging method Provide a refrigerant leakage state monitoring system.A superheated maintenance step is performed.The supercooling degree calculated in the supercooling calculation process is zero.The average opening of the operating evaporator, which is derived from the average opening of the evaporatorThe average opening, which is the average opening of the operating evaporator in the normal condition during the normal operation, exceeds the reference average opening exceeding the predetermined value, and the maximum average opening of the operation evaporator is less than the maximum average opening.If the superheat calculated in the superheat calculation process is maintained at the reference superheatA refrigerant leakage state determination method including a refrigerant leakage degree determining process for determining that the degree of leakage of refrigerant is in the middle leakage state.Diagram