DEFROSTING CONTROL METHOD OF AIR-CONDITIONER USED BOTH COOLER AND HEATER

摘要

The invention comprehensively the temperature difference between the indoor temperature and indoor heat exchanger temperature and outdoor temperature and the outdoor heat exchanger as determined by that to prevent the implantation has entered a defrosting operation by the abnormal temperature of the ambient air even though the defrosting operation be made as to a control method of a combined cooling and heating air conditioner, and to significantly improve the reliability of the defrosting operation, the technical construction are groups of the indoor heat exchanger and an indoor coil temperature sensor is a temperature sensor and an indoor heat exchanger each having outdoor heat exchanger is controlled for controlling the defrosting operation of the outdoor coil temperature sensor of the temperature sensor and the outdoor heat exchanger each provided with cooling and heating air conditioner Combine In the method, the temperature difference detected by the temperature sensor of the indoor coil temperature sensor and an indoor heat exchanger and the indoor temperature is less than a determination step of determining first set temperature, the indoor temperature is lower than the first set temperature when the outdoor temperature sensor and the temperature difference detected by the outdoor heat exchanger coil temperature sensor for determining the outdoor temperature is more than the second set temperature and the determination step, the outdoor temperature is the entry step of defrosting operation when defrosting operation starts is more than the second set temperature characterized in that configured to include.