| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchanger which can improve chipping resistance.SOLUTION: In a heat exchanger which comprises a tube 109 having a flat form 109a of a flat shape in which fluid circulates, and fins 110 connected to the flat part 109a of the tube 109, the tube 109 is arranged so that the fluid circulates in a vertical direction, the tube 109 is constituted of a material having tensile strength of 50 MPa to 129 MPa, and when a plate thickness of the flat part 109a of the tube 109 is set as Tt, and a length reaching a wind upper side end part of the fins 110 from a position at which the plate thickness of the flat part 109a becomes minimum in a longitudinal direction of the flat part 109a when viewed from a fluid flow direction is set as X, a relationship of X≥-27049×Tt+6592.1×Tt-565.14×Tt+21.602(X≥0) is satisfied. |
