Patent ID: 9587843
Date: 2017-03-07
CPC Classifications: F24F,F25B

Claim:
1. An air-conditioner apparatus, comprising: a refrigeration cycle that connects a compressor that pressurizes a refrigerant, a refrigerant flow path switching apparatus that switches a circulation path of said refrigerant, a heat source side heat exchanger that makes said refrigerant exchange heat, a plurality of expansion valves that adjust the pressure of said refrigerant, and a plurality of intermediate heat exchangers that exchange heat between said refrigerant and a heat medium different from said refrigerant, by piping, a heat medium circulation circuit that connects an intermediate heat exchanger of said plurality of intermediate heat exchangers, a pump that makes said heat medium related to heat exchange of said intermediate heat exchanger circulate, and a plurality of use side heat exchangers that exchange heat between said heat medium and the air related to an air-conditioning space, by piping, wherein a heat source apparatus that is installed in an outdoor space of a building or in a space connected to the outdoor space accommodates said compressor, said refrigerant flow path switching apparatus, and said heat source side heat exchanger, and a relay unit that is provided in a non-air-conditioning space, which is different from said air-conditioning space and said outdoor space, accommodates said plurality of expansion valves, said pump, said plurality of intermediate heat exchangers, a plurality of heat medium flow path switching apparatuses and a plurality of pipelines including branches, the heat source apparatus and the relay unit are connected by only two pipelines to form said refrigeration cycle, and wherein each of a plurality of indoor units that accommodate a respective one of said use side heat exchangers is installed at a position where said air-conditioning space is capable of being air-conditioned, said relay unit and each of said indoor units are connected by only two pipelines, respectively, from outside of a wall which partitions the inside and the outside of said air-conditioning space, to form said heat medium circulation circuit, one of said plurality of pipelines including branches connects one of said plurality of intermediate heat exchangers and a plurality of said indoor units, said plurality of heat medium flow path switching apparatuses are disposed on respective branches of said plurality of pipelines including branches, and the air-conditioner apparatus has a simultaneous cooling and heating operation in which heating of said heat medium by at least one of said plurality of intermediate heat exchangers and cooling of said heat medium by at least another one of said plurality of intermediate heat exchangers are performed simultaneously, and said heated heat medium is fed to a use side heat exchanger of an indoor unit performing heating and said cooled heat medium is fed to a use side heat exchanger of another indoor unit performing cooling by switching some or all of said heat medium flow path switching apparatuses, wherein when a heating only operation is performed, at least one of said plurality of expansion valves adjusts the pressure of said refrigerant that flows from an intermediate heat exchanger for heating, said intermediate heat exchanger for heating is one of said plurality of intermediate heat exchangers and heats said heat medium, when a cooling only operation is performed, at least another one of said plurality of expansion valves adjusts the pressure of said refrigerant that flows from said heat source side heat exchanger and flows into an intermediate heat exchanger for cooling, said intermediate heat exchanger for cooling is one of said plurality of intermediate heat exchangers and cools said heat medium, and when the simultaneous cooling and heating operation is performed, at least one of said plurality of expansion valves adjusts the pressure of said refrigerant between said intermediate heat exchanger for heating and said intermediate heat exchanger for cooling.