Gas boiler, particularly for central heating
OwnerMaurice Vidalenqinventor
Life of this patent
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Abstract
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.
Claims19
A gas-burning boiler comprising
- a boiler chamber,
- walls defining said boiler chamber,
- a plurality of heat-exchanger tubes arranged in said chamber, the heat exchanger tubes being parallel to each other,
- an outlet for gases from the chamber in one of said walls,
- an extraction fan in said outlet,
- a burner unit mounted in said chamber and penetrating an aperture in one of said walls,
- the burner unit comprising an inlet for combustion air gas fuel into the chamber,
- ignition means in said chamber for igniting the combustion air and gas fuel,
- a flame surface of said burner unit extending between the heat exchange tubes of the plurality of heat exchange tubes and generally parallel to them and baffle means in said chamber for defining a gas flow path from the burner unit to the fan such that hot gases flow from said flame surface substantially equally over each of the plurality of heat exchanger tubes, whereby upon operation of the extraction fan combustion air and gas fuel are drawn into the chamber and ignited there under a sub-atmospheric pressure.
Dependencies are inferred from the claim text.