Daikin Industries, Ltd.

Daikin Europe N.v.

Makoto Inoue

Satoshi Kawano

Ryuuichi Toyota

Kazunari Fukagawa

Natsuko Kitagawa

Kevin Cornelis

Keiya Nagahara

Kyouji Araya

Kazuya Fukuda

A refrigerant cycle apparatus includes a refrigerant circuit that circulates a refrigerant, and a leak sensor that detects a refrigerant leaking from the refrigerant circuit, in which the refrigerant cycle apparatus includes, as an operating mode, a recovery mode for recognizing occurrence of an abnormality in the leak sensor and recovering a refrigerant to a predetermined location in the refrigerant circuit.

Refrigerant cycle apparatus

A method monitors an air-conditioner having a semi-conductor gas sensor, the method including: determining that a refrigerant leakage has occurred on condition that the detection value is equal to or greater than a first threshold when the fan is in operation; starting operation of the fan as a provisional operation if the detection value is equal to or greater than a second threshold when the fan is not in operation; stopping the provisional operation of the fan; determining that a refrigerant leakage has occurred on condition that the detection value is equal to or greater than a third threshold after stopping the provisional operation of the fan; and taking a predetermined action for outputting alarm information and/or limiting supply of refrigerant to the heat exchanger when a refrigerant leakage is determined to have occurred.

Air-conditioner, air-conditioning system, and method for monitoring air-conditioner

Growing community of inventors

Osaka, Japan

Makoto Inoue