Flame retention plate for a burner

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(11)

EP 0 462 695 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	11.03.1992 Bulletin 1992/11

(43)	Date of publication A2:
	27.12.1991 Bulletin 1991/52

(21)	Application number: 91303855.0

(22)	Date of filing: 29.04.1991

(51)	International Patent Classification (IPC)⁵: F23D 14/74, F23D 14/22, F23D 14/36

(84)	Designated Contracting States:
	DE FR IT NL

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Priority:

19.06.1990 US 540079

(71)	Applicant: A.O. Smith Corporation
	Milwaukee, Wisconsin 53224 (US)

(72)	Inventors:
	Clancy, Kevin F. El Paso, Texas 79912 (US) Lovelady, James T. Apt. C 203 Burien WA 98148 (US)

(74)	Representative: Carpenter, David et al
	MARKS & CLERK, Alpha Tower, Suffolk Street Queensway Birmingham B1 1TT Birmingham B1 1TT (GB)

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References cited: :

(54)	Flame retention plate for a burner

(57) A flame retention plate (46) for a power burner (10) is designed to alter the direction of flow of air passing through openings (52, 54, 56) in the flame retention plate (46). The direction of air flow is altered by a ramped surface (58) forming a portion of each opening (54) in a ring of intermediate openings disposed between inner small openings (52) and outer large openings (56). The ramped surface (58) is oriented for directing air radially outwardly to mix with air flowing through the outer large openings (56). This action creates a partial vacuum at discharge orifices (49, 50) formed in a gas supply tube (20), with the orifices (49, 50) being disposed downstream of the flame retention plate (46), to actively suck gas out of the gas tube (20) to enhance mixing of gas with air. Highly efficient combustion of the mixed gas and air results, providing a flame close to the flame retention plate (46).

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