| 摘要 |
<p>The heated hot-water storage vessel, pref. a gas-heated pressure vessel, has a burner tube passing from the burner through the interior of the vessel. Inside the vessel (10) is a heat exchanger (21), whose union (22) extend through its wall for connection to a hot-water system. The exchanger can comprise a hot-water pipe coil with a number of turns running in a spiral coaxially round the burner tube (13). The hot-water system can incorporate a circulating pump, controlled by a thermostat (22) mounted in the vessel.</p> |
