| 摘要 |
PROBLEM TO BE SOLVED: To protect the earth environment, by reducing the running cost of heating, and also, reducing the discharge of CO2 which becomes the primary factor of gloval warming. SOLUTION: This air conditioner is equipped with a gas refrigerant heater 7 which uses gas as fuel and heats a refrigerant with its combustion heat source, an outdoor heat exchanger 8 which performs the heat exchange between the refrigerant and outside air, an indoor heat exchanger 3 which performs the heat exchange between the refrigerant and indoor air, a compressor 1 which circulates the refrigerant, and change-over valves 5 and 6 which switch the flow of the refrigerant to either the said outdoor heat exchanger 8 or the gas refrigerant heater 7. In this case, the change-over valves 5 and 6 control the changeover, based on the outside air temperature signal from an outside air temperature 11 at least inputted into an operation controller 10, and the heat pump operation utilizing an air heat source or the gas refrigerant heating operation utilizing the gas heat source is performed. |
