Stoves and furnaces – Stoves – Cooking
Patent
1999-07-01
2000-04-25
Yeung, James C.
Stoves and furnaces
Stoves
Cooking
126 25R, A47J 3700, F24B 300
Patent
active
060531614
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a dome for a hot-air gun for accelerated ignition and burning of solid fuels, especially charcoal.
REVIEW OF RELATED ART
High-temperature air currents generated by hot-air guns can effectively perform various tasks. Specially-shaped shaped domes can further increase the effectiveness of such currents through the purposeful direction of the hot-air current. In the domes known and used to now, the hot air is used briefly, on a relatively small surface. Due to the absence of a cover, the heat is quickly dispersed into the surrounding area.
SUMMARY OF THE INVENTION
It is an object of the invention to provide a dome that has a simple design and is inexpensive to produce, and whose particular spatial and relatively large-surface shielding effect permits a rapid ignition of embers and a rapid burning of fuels.
This object is accomplished by a shield hood that is open toward the fuel, stores heat and conducts it toward the fuel, and has a connecting sleeve for a pipe socket for the connection to the hot-air gun.
It is a further object of the invention to attain a reduction in flying sparks when the fire is ignited.
This object is accomplished in that the pipe socket has at least one ventilation opening inside the shield hood.
A further object of the dome is a more controlled fire ignition.
This object is accomplished in that a plurality of air-diverting openings is cut into the shield hood, specifically in the jacket region adjacent to the open end face of the pipe socket.
Advantageous modifications of the solutions to the objects ensue from the dependent claims.
The object of the invention encompasses not only the features of the individual claims, but also combinations thereof.
The purposeful concentration of the heat in a limited space renders the combustible material ready for use in less time.
The enrichment of hot air permits the ignition of the combustible material without a further ignition source. No auxiliary agents (liquid or solid lighting aids) or methods of intensifying the glowing process (bellows or the like) are required for supporting the process.
The size of the hood is a function of the power of the hot-air gun and the quantity of combustible material.
The shield hood according to the invention has a reflective inside surface to avoid temperature gradients. This surface preferably comprises high-grade steel to support the intended effect through reflection.
For safe handling, the pipe socket preferably projects diagonally into the hood from above, and to the outside such that the space between the hood surface and the connecting sleeve to the hot-air gun is sufficiently large to avoid injuries. To apply the hot air directly to the combustible material, the pipe socket is extended into the center part of the hood.
The hood is advantageously provided with openings to allow air to exit. These openings are preferably provided in the lower region to avoid flying sparks. A hemispheric hood design is advantageous.
This shield hood has a simple, inexpensive design, functions reliably, and adds service value to charcoal grills.
With the arrangement of at least one ventilation opening in the pipe socket at a short distance from the shield hood, less air exits at the lower end of the pipe socket when the charcoal ignites, and thus fewer sparks fly.
The holes cut into the front edge of the shield hood, which are disposed partly around the circumference and partly over the height of the shield hood, disperse the hot air, thus effecting a more controlled ignition of the fire.
The combination of the ventilation opening in the pipe socket and the air-diverting openings in the globe-shaped shield hood, in combination with the advantages of the more controlled ignition and the reduction in flying sparks, lends the dome an increased service value.
BRIEF DESCRIPTION OF THE DRAWING FIGURES
Variations of an embodiment according to the invention are illustrated in the drawing, which shows in:
FIG. 1 a schematic cross-section through a shield hood associated wi
REFERENCES:
patent: 3033275 (1962-05-01), Nichols
patent: 3589312 (1971-06-01), Cooper
patent: 4422435 (1983-12-01), Spell
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