Metal fin heat exchange unit and heat exchanger adopting same

The invention discloses a metal fin plastic tube heat exchange unit and a heat exchanger adopting the metal fin plastic tube heat exchange unit, and relates to the technical field of heat exchangers.The metal fin plastic tube heat exchange unit and the heat exchanger adopting the metal fin plastic tube heat exchange unit aim to solve the problems that in the prior art, a heat exchanger wears easily and is easy to wind and block, not easy to clean and poor in corrosion resistance. The metal fin heat exchange unit comprises two metal plates. More than two semicircular grooves which are parallelto each other are stamped in each metal plate. Surfaces, provided with the semicircular grooves, of the two metal plates are opposite to each other. Every two opposite semicircular grooves can form ametal tube cavity. Plastic tubes are arranged in the metal tube cavities, and are in compressing type contact with the metal tube cavities without gaps. The metal fin plastic tube heat exchange unitand the heat exchanger adopt