REFRIGERANT LEAKAGE DETECTION METHOD OF ARI CONDITIONER, AND AIR CONDITIONER

To solve the problem of having to detect refrigerant leakage so as to prevent a refrigerant concentration in a leaked space from increasing in the case that refrigerant leaks from the inside of a refrigeration cycle of an air conditioner.SOLUTION: The refrigerant leakage detection method is a refrigerant leakage detection method of an air condition including: a compressor for compressing a gas refrigerant; a condenser for condensing the compressed gas refrigerant to be a liquid refrigerant; an evaporator for evaporating the liquid refrigerant to be a gas refrigerant; and a connection pipe for connecting the compressor, the condenser, and the evaporator. When a compressor frequency is regarded as F [Hz], a condenser heat exchange amount based on the compressor frequency F as Q [kW], condenser heat exchange performance as KA [kW/K], a condenser suction air temperature as Tci [°C], a condensed refrigerant temperature of actual measurement as Tc [°C], a temperature difference correction coefficient as α [°C], and a temperature difference as Tb[°C]=(Tc'-Tci)-α, an estimated condensed refrigerant temperature Tc' [°C] is calculated from Tb[°C]=Q/KA, and refrigerant leakage is detected in the case that a difference between the estimated condensed refrigerant temperature Tc' [°C] and the condensed refrigerant temperature of actual measurement Tc [°C] is larger than a prescribed value.SELECTED DRAWING: Figure 2 【課題】空気調和機の冷凍サイクル内から冷媒が漏洩した場合に、漏洩した空間の冷媒濃度が高まらないよう、早期に冷媒漏洩を検知する必要がある。【解決手段】本発明の冷媒漏洩検知方法は、ガス冷媒を圧縮する圧縮機と、圧縮されたガス冷媒を凝縮し液冷媒にする凝縮器と、液冷媒を蒸発させガス冷媒にする蒸発器と、前記圧縮機、前記凝縮器、および、前記蒸発器を接続する接続配管と、を有する空気調和機の冷媒漏洩検知方法であって、圧縮機周波数をＦ[Hz]、該圧縮機周波数Ｆに基づく凝縮器熱交換量をＱ[kW]、凝縮器熱交換性能をKA[kW/K]、凝縮器吸込空気温度をTci［℃］、実測の凝縮冷媒温度Tc［℃］、温度差補正係数をα［℃］、温度差をTb[℃]＝(Tc'-Tci)-αとしたとき、Tb[℃]＝Q/KAから推定の凝縮冷媒温度Tc'[℃]を算出し、推定の凝縮冷媒温度Tc'[℃]と実測の凝縮冷媒温度Tc[℃]の差が、所定値より大きい場合に冷媒漏洩を検知するものとした。【選択図】図２