A multi-type air-conditioning device capable of simultaneously performing cooling and heating operations, comprising:
- an outdoor unit having an outdoor heat exchanger and a compressor;
- a plurality of indoor units having indoor heat exchangers connected to the outdoor heat exchanger and the compressor, and leakage detection sensors capable of detecting leakage of a refrigerant;
- a single-port shut-off valve device capable of controlling distribution of the refrigerant to a refrigerant distribution passage to which one of the indoor units is connected;
- and
- a multi-port shut-off valve device capable of controlling distribution of the refrigerant to a plurality of refrigerant distribution passages to which a plurality of the indoor units are connected,
- wherein the single-port shut-off valve device includes
- a single-port liquid-side control valve provided for the refrigerant distribution passage in the single-port shut-off valve device to control distribution of the refrigerant in a liquid state, and
- a single-port gas control valve provided for the refrigerant distribution passage in the single-port shut-off valve device to control distribution of the refrigerant in a gas state,
- the multi-port shut-off valve device includes
- a multi-port liquid-side control valve provided in common for the plurality of the indoor units in the multi-port shut-off valve device to control distribution of the refrigerant in the liquid state, and
- a multi-port gas control valve provided for the refrigerant distribution passages in the multi-port shut-off valve device to control distribution of the refrigerant in the gas state,
- the multi-type air-conditioning device comprising:
- a maintenance processing unit capable of performing maintenance processing of, in a case where one of the leakage detection sensors provided for the one of the indoor units connected to the single-port shut-off valve device detects leakage of the refrigerant, closing the single-port liquid-side control valve and the single-port gas control valve corresponding to the one of the indoor units to stop operation of the one of the indoor units and maintaining the indoor units other than the one of the indoor units to be operable;
- and
- a recovery processing unit capable of performing recovery processing of, in a case where any of the leakage detection sensors provided for the plurality of the indoor units connected to the multi-port shut-off valve device detects leakage of the refrigerant, causing the compressor to behave in a state where the multi-port liquid-side control valve and the single-port liquid-side control valve are closed to recover the refrigerant remaining in each of the indoor heat exchangers to a side of the compressor, closing all of the multi-port gas control valve and the single-port gas control valve after completion of recovery of the refrigerant, and stopping the compressor.