| 摘要 |
<p>Indirectly heated water heater comprises a lined, composite container; an installation for supplying cool water and discharging heated water; a heat-exchanger inside the container for heat-transfer from a fluid passing through the heat-exchanger, into the water in the container; a heat-insulation about the container. The components of the container are welded together. The heat-insulation comprises a jacket defining, together with the container, a heat-insulating evacuated space. The heat-exchanger comprises a tube with ribs. The lining consists of a vinyl resin or a polyurethane about 0.5 mm thick.</p> |
