| 摘要 |
A heat exchanger includes a communication flow path 31 which communicates a first lower tank provided in a plurality of laminated flat tubes with a second lower tank provided adjacent to the first lower tank, the communication flow path 31 includes a throttle portion 34 formed in the center in a width direction, the throttle portion 34 has a curved surface formed in a protruded shape inside the communication flow path 31 with a predetermined radius of curvature R, when the length, in which an outer dimension in a height direction is the maximum, of the communication flow path 31 is set to be H, and the length, in which an outer dimension in the width direction is the maximum, of the communication flow path 31 is set to be W, the radius of curvature R of the throttle portion 34 is R≧0.2 H. |
| 主权项 |
1. A heat exchanger comprising:
a plurality of flat tubes to be laminated; a plurality of fins provided between the adjacent flat tubes; a first tank communicating with a first refrigerant flow path formed inside the flat tube, provided on one side in a longitudinal direction of the flat tube, and provided over a lamination direction of the plurality of flat tubes; a second tank communicating with a second refrigerant flow path formed inside the flat tube, provided on one side in the longitudinal direction of the flat tube, and provided over the lamination direction and adjacent to the first tank; and a communication member including a wall body which forms a communication flow path to communicate the first tank with the second tank, wherein, when a direction which is perpendicular to the lamination direction and in which the first tank and the second tank are adjacent to each other is set to be a width direction, and a direction which is perpendicular to the width direction and the lamination direction is set to be a height direction, an outer shape of the wall body of the communication flow path, seen from the lamination direction, is formed to be long in the width direction compared with in the height direction and the communication flow path includes a throttle portion formed on the center in the width direction, an outer wall surface of the wall body in the throttle portion has a curved surface formed in a protruded shape inside the communication flow path with a predetermined radius of curvature R, and when the length, in which an outer dimension in the height direction is the maximum, of the communication flow path is set to be H, and the length, in which an outer dimension in the width direction is the maximum, of the communication flow path is set to be W, the radius of curvature R of the throttle portion is R≧0.2 H, the length L, in which an outer dimension in the height direction is the minimum, of the throttle portion of the communication flow path is L≦0.9 H, and a part of the length H, in which the outer dimension in the height direction is the maximum, is provided in a position in the width direction outside by ¼ W or more from a part of the communication flow path being the length L. |
