JPS643467A - Heat pump type air conditioner - Google Patents

Abstract

PURPOSE: To realize a comfortable heating by combining a sub-circuit for conducting a reversible reaction for heating and absorbing heat with a refrigerating cycle, and generating a heat by a chemical reaction while a main circuit cannot generate sufficient heating capacity at the time of defrosting and starting the heating. CONSTITUTION: An adsorbing medium 7 of a reservior 8 for opening solenoid valves 9, 10 simultaneously at the time of starting a defrosting is moved to a reaction container 6 via a solenoid valve 10 and reacted with a silica gel 5 to generate heat. After moving the medium 7, the valves 9, 10 are closed. Further, a solenoid valve 18 is closed simultaneously at the time of starting the defrosting, a solenoid valve 19 is opened, and a refrigerant is guided to a first bypass circuit 21. Since a first heat exchanger 11 is embedded in the gel 5, its reaction heat is transferred to the medium of a main circuit, and fed to an outdoor heat exchanger 4 via a check valve 21, an indoor heat exchanger 2, a solenoid valve 14 and a pressure reducing mechanism 3 in the state that its enthalpy is enhanced. That is, the defrosting time can be shortened by utilizing the reaction heat, and a temperature of the medium flowing to the exchanger 2 is maintained high, and heating is executed.