| 摘要 |
<p>GAS BOILER, PARTICULARLY FOR CENTRAL HEATING Maurice VIDALENQ Gas-burning boilers have in a chamber a plurality of finned heat-exchange tubes arranged around a central gas burner which is substantially of the same length as the finned tubes. An extraction fan draws gases from the chamber such that the chamber works under sub-atmospheric pressure which is preferably 12 mm water column or more below atmospheric. Baffles provide that hot gases must pass over the heat-exchange tubes as they go from the burner to the fan. A self-operating pressure regulator may be provided for the chamber, and various advantages constructions of burner are disclosed which give silent and evenly distributed burning of the gases. The burner is arranged on a horizontal axis and so as to be withdrawable as a unit from the chamber without affecting the heat-exchanger tubes or baffle arrangements.</p> |
