PURPOSE: To provide an air conditioner having a simple auxiliary heater which can quickly heat by using high temperature high pressure gas refrigerant (hot gas) in a refrigerating cycle.
CONSTITUTION: A warm water heater 3 is used as a main heater, and a heat exchanger 14 using hot gas in a refrigerating cycle is used as an auxiliary heater. A first switching valve 18a is provided in a refrigerant circuit for connecting a compressor 10 to a condenser 11 for constituting the cycle, and a pressure reducing unit 22 is provided in a first bypass tube 20 which detours the condenser 11. A second bypass tube 30 to be branched from the tube 20 is connected to an inlet side of a receiver 12. At the time of heating, work of compression of the compressor 10 generates heat quantity of hot gas in the tube 20 to be dissipated from the exchanger 14, and refrigerant quantity flowing in the exchanger 14 is regulated by the receiver 12.
KINOSHITA HIROSHI
ITO SEIJI
