| 摘要 |
Heating coils in a sinusoidal water-flow duct are positioned in a housing formed of two shells (3,5) tightly joined together along corresponding contact surfaces (7,8). In the water-flow duct (11), water is deflected by 180 degrees round a free end part of a separating wall (27) and flows in opposite directions, separated by the wall. The width of the heated water-flow duct formed between the contact surfaces can be constant or narrower near the end part (51) of the separating wall. |
