Method for controlling defrosting of evaporator of refrigerant circuit for heating systems, involves starting/terminating defrosting of evaporator when difference between evaporation temperatures/pressures exceeds threshold value

摘要

The method involves detecting the initial and actual evaporation pressures or the initial and actual evaporation temperatures by a pair of temperature or pressure sensor (8,9) provided in a refrigerant circuit, after a start of a refrigerant heating cycle at a predetermined time. A respective defrosting of an evaporator (4) is started or terminated, when a difference between the initial evaporation temperature and the actual evaporation temperature or a difference between the initial evaporation pressure and the actual evaporation pressure exceeds a predetermined threshold value.