Patent ID: 9212825
Filing Date: 2015-12-15
Classification: F24F,F25B

Abstract:
1. An air conditioner comprising: a heat-source side refrigerant circuit in which a compressor, an outdoor heat exchanger, a plurality of intermediate heat exchangers, a first refrigerant flow-rate controller disposed between said plurality of intermediate heat exchangers, and a second refrigerant flow-rate controller disposed on an inlet side of a first intermediate heat exchanger located on an upstream side of said plurality of intermediate heat exchangers and a third refrigerant flow rate controller disposed on an outlet side of second intermediate heat exchanger located on downstream side in said plurality of intermediate heat exchangers are connected in series; and a plurality of use-side refrigerant circuits in which each of said plurality of intermediate heat exchangers and a plurality of indoor heat exchangers are connected in parallel, wherein said compressor and said outdoor heat exchanger are disposed in an outdoor unit; wherein said plurality of intermediate heat exchangers, said first refrigerant flow-rate controller, and said second refrigerant flow-rate controller and said third flow rate controller are disposed in a relay portion; wherein said plurality of indoor heat exchangers are disposed in a plurality of indoor units, respectively; wherein said outdoor unit and said relay portion are connected by two refrigerant pipelines; wherein in said plurality of intermediate heat exchangers, a heat-source side refrigerant circulating in said heat-source side refrigerant circuit and a use-side refrigerant circulating in said use-side refrigerant circuit perform heat exchange, wherein, in said simultaneous cooling and/or heating operation mode, an opening degree of said first refrigerant flow-rate controller is throttled and said first intermediate heat exchanger operates as a condenser and said second intermediate heat exchanger operates as an evaporator, wherein said first refrigerant flow-rate controller is fully opened and an opening degree of said second refrigerant flow-rate controller is throttled and all the intermediate heat exchangers operate as an evaporator in said full-cooling operation mode or wherein an opening degree of said third refrigerant flow-rate controller is throttled in said full-heating operation and said first refrigerant flow-rate controller and said second refrigerant flow-rate controller are fully opened and all the intermediate heat exchangers operate as a condenser in said full-heating operation mode, and