Heat pump with deicing system for evaporator - uses reversed refrigerant flow into ice collector with heating tubes on tank

摘要

The heat pump has a compressor and an expansion valve between the liquifier and evaporator. The refrigerator circuit is operated in reverse for deicing the evaporator tube. The thawed ice falls into a heated collection trough below the evaporator. The system is economical to operate and the icing of the evaporator tubes is prevented. Heating tubes (21) are arranged in or on the collection tank (20). The hot refrigerant flows through these heating tubes after passing through the evaporator tubes (19). The feeding pipeline (22) for the heating tubes (21) starts from a position of the refrigerant circulation (16) situated between the evaporator (10) and the expansion valve (14).