Stoves and furnaces – Stoves – Heating
Patent
1989-05-01
1989-12-26
Focarino, Margaret A.
Stoves and furnaces
Stoves
Heating
431347, 126 92R, F24C 302
Patent
active
048891037
ABSTRACT:
An infrared heater for a bowl-shaped cooking wok having a central region and an annular region surrounding the central region. The heater includes a ribbon-type gas-fired burner head fed with a pressurized mixture of air and gas that is expelled from the head through a cylindrical array of minute jet openings to produce, when ignited, an omnidirectional flame. Also provided is a round block of refractory material which when heated to an elevated temperature by the head emits infrared radiation. The block has superposed base, intermediate and top sections, the base section having a cavity therein whose central zone communicates with central openings in the intermediate and top sections, and an outer zone which communicates with a circular array of bores in the intermediate and top sections. The burner head is placed within the block so that the flame projected from the lower portion of the cylindrical array impinges on the wall of the cavity in the base section, whereby the resultant radiation is emitted through the bores to provide secondary beams, while the flame projected from the lower portion of the array impinges on the wall of the opening in the intermediate section, whereby the resultant radiation is emitted through the openings to provide a main beam. The wok is seated above the block so that its central region is heated by the main beam and its annular region is heated by the outer beams.
REFERENCES:
patent: 2594914 (1952-04-01), Grosskloss
patent: 2621722 (1952-12-01), Abrams
patent: 2870829 (1959-01-01), Williams
patent: 3136354 (1964-06-01), Fitzgerald
patent: 3933146 (1976-01-01), Hastings
patent: 4432727 (1984-02-01), Fraioli
patent: 4507083 (1985-03-01), Fraioli
patent: 4702693 (1987-10-01), Fraioli
Ebert Michael
Focarino Margaret A.
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