▎ 摘　　要

NOVELTY - The utility model claims a high-efficiency fin heat exchanger for low temperature heat pump, comprising a copper pipe, aluminium fin, a left supporting plate, a right supporting plate, a connecting rod, provided with a flanging flange sleeve and through hole on the aluminium foil fin; parallel provided with multiple groups of aluminium foil fin between the left supporting plate and right supporting plate, the connecting rod passes through the through hole of the multiple groups of aluminium foil fin, two ends of the connecting rod are respectively fixedly connected with the left supporting plate and right supporting plate, flanging flange sleeve of the copper pipe passes through the aluminium foil fin; copper pipe and sleeve tightly contact through an expansion process, the positive and negative of two surfaces of the aluminium foil fins, flanging flange sleeve inner surface and an outer surface, and the outer surface of the copper tube are coated with graphene coating. using graphene excellent heat conductivity, super-hydrophobic performance and excellent mechanical characteristics, and by optimizing the thickness of the distance layer parameter and the aluminium foil fins of graphene layer such that a frost layer thickness of heat exchanger is reduced, defrosting speed is accelerated, and the heat exchange efficiency is obviously improved, and it can prolong the using life of the heat exchanger via the protection of the graphene layer, so this utility model has strong practicability and great popularization value.