Defrosting control apparatus of air conditioner

Abstract

Abstract PURPOSE: To prevent the misaction of an air conditioner, by temporarily postponing the flow of defrosting control when the change of an ambient temperature of an evaporator is high. CONSTITUTION: An ambient temperature detector 9 for detecting the ambient air temperature of the evaporator 4 is provided and is connected with a defrosting operation control apparatus 7. Thereby, when a gaseous refrigerant that leaves a compressor 1 is delivered via a four way change over valve 5a into a condenser 2 where its heat is radiated (heating operation), then is introduced via a four way change over valve 5b into an expansion apparatus 3, and comes back to the compressor 1 again via the evaporator 4 and the four way change over valve 5a, the ambient air temperature of the evaporator 4 is detected by the ambient temperature detector 9, the rate of change of the ambient air temperature is calculated in a defrosting operation controlling apparatus 7, and when the rate of change is negative and higher than a predetermined value, the start of the defrosting operation will be temporarily postponed even if the defrosting operation starting conditions are satisfied. Accordingly the misaction due to momentary temperature change of the evaporator 4 by external turbueence will be prevented. COPYRIGHT: (C)1981,JPO&Japio

Inventors

• 👤 Eiji Saito
• 👤 Norio Yamashita

Bibliographic Details