AIR-CONDITIONING APPARATUS

摘要

An air-conditioning apparatus includes a plurality of indoor units each located inside a building and at a position that enables the indoor unit to condition air, and a relay unit installed in a space not to be air-conditioned inside the building. The relay unit and each indoor unit are connected to each other via a first heat medium pipe in which a first heat medium such as water or brine flows. The relay unit accommodates therein a first refrigerant circuit including a compressor, a plurality of first intermediate heat exchangers 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, and a second intermediate heat exchanger that exchanges heat between the refrigerant and a second heat medium, which are connected via a refrigerant pipe.

主权项

1. An air-conditioning apparatus comprising:
a plurality of indoor units each located inside a building and at a position that allows the indoor unit to condition air in a space to be air-conditioned; and a relay unit configured to be installed in a space not to be air-conditioned separated from the space to be air-conditioned, the space not to be air-conditioned being one of a space inside the building, and a space outside and close to the building, wherein the relay unit and each of the indoor units are connected to each other via a first heat medium pipe in which a first heat medium flows, the first heat medium being one of water and brine, the relay unit
accommodates therein a refrigerant circuit including a compressor, a plurality of first intermediate heat exchangers 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, and a second intermediate heat exchanger that exchanges heat between the refrigerant and a second heat medium being one of water and brine, the compressor, the first intermediate heat exchangers, the expansion devices, and the second intermediate heat exchanger being connected via a refrigerant pipe, andis configured to cool the first heat medium and heat the first heat medium simultaneously, separately transport the cooled first heat medium and the heated first heat medium to the plurality of indoor units, and cause the second heat medium to circulate between the outside of the building and the relay unit and exchange heat with the refrigerant in the second intermediate heat exchanger.