PURPOSE: To effect efficiently and simultaneously cooling and heating processes by generating a great many fine water drops in the cyclone of a heat exchanger and air-conditioning a room with this heat exchanger and utilizing a heat pump at the same time.

CONSTITUTION: In the cyclone 3 of a heat exchanger evaporation pipes 30 of a refrigerator are arranged, and tangentially on the upper section of the cylindrical section 31 of the pipe 30 an air intake opening 32 is provided. The cylindrical section 31 is also provided with a outlet tube 11 which extends downwards and cool water jet tube 12 is arranged so as to surround the outlet tube 11. Water is jetted out by a jet nozzle 13 to create a great many minute water drops by impact. Air containing those minute water drops is sent into a room and on the other hand the air in the room is drawn out. A refrigerator R is used as a heat pump, and not only its cooling and heating system is effectively utilized, but also it is used to cool effectively the heating medium by placing at least part of a heat exhaust tubes 19, for example, at least part of heat supply tubes 19 at the outside of the wall section W.