| 摘要 |
The tube (10) is made from sheet metal cut out and rolled to form two parallel channels (12, 14) which allow a fluid to circulate in two opposite directions. The channels are made by turning in the two edges of the sheet metal to make a partition (26, 28) between them. They are connected at one end (30) to a fluid chamber divided into two compartments, and at the other end (32) they are closed separately by folds (36) in the metal sheet. The fluid flow from one channel to the other has two or more apertures (38, 40, 42) in the partition which are rectangular in shape. The tube has one main flat face (16), two semi-circular edges (18, 20), and a second flat face formed by the two in-turned edges (22, 24) of the metal sheet. Its upper edge has two pairs of opposite tabs (34) for attaching it to slots in the fluid chamber wall. |
