Stoves and furnaces – Stoves – Heating
Patent
1997-03-28
2000-10-31
Yeung, James C.
Stoves and furnaces
Stoves
Heating
126 92B, 237 70, 219347, 431215, F24C 300
Patent
active
061386626
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to heaters of the type in which a combustible substance is burnt to release heat. More particularly the invention relates to radiant heaters for heating industrial buildings such as factories, warehouses, hangers and other large structures.
It is known to heat large buildings, and in particular large industrial premises by means of radiant heaters, and typical radiant heaters used for this purpose consist of a U-tube radiator system, a burner such as a gas burner being connected to one end of the tube and a fan being arranged at the other end of the tube for extracting combustion gases from the tube. The U-tube is suspended below a heat reflective housing, which reflects radiation emitted from the tube towards the ground. Such a heater is disclosed in, for example, British Patent Application GB 2145218.
A major problem encountered with such radiant heaters lies in ensuring that the radiant flux density at ground level is as uniform as possible, and that hot spots and cold spots are avoided. This represents a problem because whilst a particular form of radiant heater may be configured to provide optimal heating in a building of one size and shape, it may provide a far from ideal heating effect when used in a building of a different size and shape. In particular, it has proved difficult to compensate for variations in the mounting height above ground level, the mounting height generally being dependent upon the availability of support structures such as roof support structures on which to mount the heaters.
SUMMARY OF THE INVENTION
The present invention sets out to overcome these problems by providing, in one aspect, a modular heating assembly comprising a basic heater unit to which may be attached a reflective skirt having any one of a plurality of reflector configurations. In accordance with one aspect of the invention, a reflective skirt of a particular configuration may be selected to provide the desired reflective pattern and consequent radiant flux density at a given location at ground level in a building.
A further object of the invention is to improve the radiant efficiency of such heaters, and to minimize heat losses due to conduction and convection.
A still further object of the present invention is to provide a heater which is more efficient, in the sense that a greater heating effect is obtainable for the same consumption of fuel, or alternatively that less fuel is required to achieve the same heating effect.
Accordingly, in a first aspect, the invention provides a process for fitting a heating system in a building, the heating system comprising overhead radiant heaters with skirt portions for directing the radiated heat towards the floor of the building, the process comprising the steps of: density Q; heaters; individual heater; configuration to achieve that pattern;
In a second aspect, the invention provides a radiant heater comprising a radiative heating element; a housing, the underside of which is recessed to receive the radiative heating element, the radiative heating element being disposed beneath the housing such that its upper half is wholly within the recess, and at least a portion of its lower half protrudes downwardly from the recess; the recess having a heat reflective surface for reflecting heat radiation from the radiative heating element in a downwards direction; the housing having means enabling the attachment thereto of a reflective skirt for focusing the radiation emitted from the radiative heating element.
The radiative heating element may be, for example, a radiant heater tube heated by a gas burner, or may be an electrically heated heating element.
In one embodiment, the radiant heater comprises a tube, a burner communicating with one end of the tube; and extraction means communicating with the other end of the tube for extracting combustion gases from the tube.
The recess on the underside of the housing is preferably in the form of a channel, e.g. an elongate channel. Thus the radiative heating element is dispose
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Jones Philomena Joan
Yeung James C.
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