| 摘要 |
An air-conditioning apparatus includes a plurality of indoor units 2 each located inside a building 9 and at a position that allows the indoor unit 2 to condition air in a space to be air-conditioned 7, and a relay unit 3 installed in a space not to be air-conditioned 8 inside the building 9. The relay unit 3 and each indoor unit 2 are connected to each other via a first heat medium pipe 5b in which a first heat medium such as water or brine flows. The relay unit 3 accommodates therein a first refrigerant circuit C including a compressor 10, a plurality of first intermediate heat exchangers 15 that exchange heat between the first heat medium and refrigerant that performs a phase shift or turns to a supercritical state during operation, a plurality of expansion devices 16, and a second intermediate heat exchanger 13 that exchanges heat between the refrigerant and a second heat medium such as air, water, or brine, which are connected via a refrigerant pipe 4. |
