| 摘要 |
<p>A tap water boiler (1) comprising a closed water tank (2) having a first connection (8) for supplying cold water, a second connection (9) for tapping hot water, as well as a closed tubing (3) placed in the water tank, through which tubing (3), in operation, hot water provided by a suitable hot water source circulates, wherein the tubing comprises a freely mounted double wound coil having an outer helically bent tube (32) and an inner helically bent tube (33), which double wound coil extends over a relatively small height compared to the height of the water tank. <IMAGE></p> |
