| 摘要 |
PROBLEM TO BE SOLVED: To provide a double-tube heat exchanger can uniform the flow of a refrigerant in the circumferential direction in a first refrigerant flow channel between an outer pipe and an inner pipe. SOLUTION: This double-tube heat exchanger 1 includes the outer pipe 2, and the inner pipe 3 disposed in the outer pipe 2 with a clearance, the clearance between the outer pipe 2 and the inner pipe 3 is applied as the first refrigerant flow channel 4, and the inside of the inner pipe 3 is applied as a second refrigerant flow channel 5. A refrigerant inflow pipe 9 and a refrigerant outflow pipe are connected with the outer pipe 2 with a clearance in the longitudinal direction of the outer pipe 2 while being communicated with the first refrigerant flow channel 4. A resistance applying section 10 projecting into the outer pipe 2 and applying the resistance to the flow of the refrigerant to the refrigerant outflow pipe side, is disposed on an end portion of a peripheral wall of the refrigerant inflow pipe 9 at a downstream side in the flowing direction of the refrigerant in the first refrigerant flow channel 4 on the peripheral wall of the refrigerant inflow pipe 9. COPYRIGHT: (C)2009,JPO&INPIT
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