| 摘要 |
PROBLEM TO BE SOLVED: To reduce manufacturing costs without deteriorating heat exchange efficiency.SOLUTION: A heat exchanger comprises a fluid guiding piping 2 which is formed in a spiral shape and guides a refrigerant, and a fin 3 disposed to contact the outer peripheral surface of the piping 2, and is configured to allow the refrigerant in the piping 2 and an air around the piping 2 to exchange heat with each other via the piping 2 and the fin 3. In the piping 2, linear outward parts 12, 22 and linear return parts 13, 23, which are connected to the outward parts 12, 22 via bent parts 14, 24, are arranged to be parallel with each other, and the outward part 12, 22, the bent parts 14, 24 and the return parts 13, 23 are formed integrally by a single tubular member. In the fin 3, a belt-like member provided with a plurality of round holes along the longitudinal direction is folded alternately in mountain fold and valley fold at positions of the round holes to be formed in a bellows shape and is installed between the outward parts 12, 22 and the return parts 13, 23 in such a manner that the inner edge of each round hole contacts the outer peripheral surface of the piping 2. |
