REFRIGERATION CYCLE DEVICE, REFRIGERANT LEAK DETECTION SYSTEM, AND INFORMATION PROCESSING DEVICE

A refrigeration cycle apparatus includes an air conditioner, sensors, an opening prediction unit, a prediction error calculation unit, a prediction error correction unit, and a leak detection unit. The opening prediction unit determines a predicted opening of the electronic expansion valve of the air conditioner based on outputs of the sensors and an operation frequency of the compressor, assuming normal operation of the air conditioner. The prediction error calculation unit calculates a prediction error by subtracting a measured opening of the electronic expansion valve from the predicted opening. The prediction error correction unit calculates multiple prediction errors in advance, calculates an offset value as an average of the multiple prediction error, and outputs a corrected prediction error by subtracting the offset value from the current prediction error. The leak detection unit detects a refrigerant leak of the air conditioner based on the corrected prediction error.