Heat exchanger having a plurality of heat dissipation fins

A heat exchanger comprising:

• a plurality of refrigerant tubes configured to allow refrigerant to flow therethrough, each refrigerant tube having:
• a first refrigerant pipe having a centerline extending in a first direction;
• a second refrigerant pipe having a center line extending in the first direction, the second refrigerant pipe being spaced apart from the first refrigerant pipe;
• and
• a return pipe connecting one end of the first refrigerant pipe to one end of the second refrigerant pipe;
• a plurality of collars, each collar surrounding at least a portion of an outer surface of a corresponding refrigerant tube;
• a plurality of heat dissipation fins connected to the plurality of collars;
• and
• an electrode in contact with each heat dissipation fin to transmit power to each heat dissipation fin,
• wherein an electrical resistance of each collar is higher than an electrical resistance of each heat dissipation fin, and
• wherein a thickness of each collar is smaller than a radius of curvature of the return pipe.

A heat exchanger comprising:

• a plurality of refrigerant tubes configured to allow refrigerant to flow therethrough;
• a plurality of collars, each collar surrounding at least a portion of an outer surface of a corresponding refrigerant tube;
• a plurality of heat dissipation fins connected to the plurality of collars;
• and
• an electrode in contact with each heat dissipation fin to transmit power to each heat dissipation fin,
• wherein the plurality of heat dissipation fins comprise:
• a first heat dissipation fin;
• and
• a second heat dissipation fin having an electrical resistance higher than an electrical resistance of the first heat dissipation fin, and
• wherein an electrical resistance of each collar is higher than an electrical resistance of the first heat dissipation fin.