| 摘要 |
PROBLEM TO BE SOLVED: To secure sufficient pressure resistance while suppressing clogging of a flow channel hole due to a brazing material, in applying a header of a layered structure in a refrigerant heat exchanger constituted by brazing a longitudinal end portion of a flat tube having the flow channel hole to the header.SOLUTION: In a refrigerant heat exchanger (1), fixed-side flat tube insertion holes (27a and 37a) are formed on fixing members (27 and 37) constituting headers (20 and 30) of a layered structure to secure a clearance gap at any part with respect to an outer peripheral edge of the flat tube (10). In the refrigerant heat exchanger (1), a dimension (Ws) in a short-side direction, of spacer-side flat tube opposite holes (26a and 36a) formed on spacer members (26 and 36) constituting the headers (20 and 30) of the layered structure, is larger than a dimension (Wf) in the short-side direction of the fixed-side flat tube insertion holes (27a and 37a). |
