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Pub. No.:    WO/1980/001945    International Application No.:    PCT/JP1980/000034
Publication Date: 18.09.1980 International Filing Date: 28.02.1980
F23D 14/30 (2006.01), F23D 14/58 (2006.01)
Priority Data:
79/25522 07.03.1979 JP
Abstract: front page image
(EN)A premixing type burner used as the heat source of a hot water unit or a hot air blower. The conventional premixing type burner of this type possesses a flame port (4) including a number of slit-like flame ports (5) disposed perpendicularly with respect to the wall of a combustion chamber, wherein the flame port (4) is formed thin at the end and thick at the central portion with a flat flame port surface. A passage (2) is so provided as to supply secondary air toward the central side of the flame port. Such a burner incorporated poor ignitability or generates a resonant sound. When the flame formed at the name port (5) is operated as small ignition flame, an ignition is preferably conducted, but it generates a resonant sound. When the name formed at the flame port (5) is as large ignition flame, the ignition is deteriorated, but does not generate the resonant sound. This invention contemplates to provide a premixing type burner in view of this point. That is, a projection (41) forming a gap (42) becoming the flame port is provided between the wall (15) of the combustion chamber and the flame port surface in the vicinity of the wall (15) to form the ignition flame at the flame port (5) except at the gap (42) to thereby improve the ignition and to form the flame (preferably large flame) for preventing the turbulence of the ignition flame in the gap (42) so as to prevent the resonant sound.
(FR)Un bruleur du type a premelange est utilise comme source de chaleur d"un chauffe-eau ou d"une soufflante a air chaud. Le bruleur du type a premelange conventionnel possede un orifice de flamme (4) comprenant plusieurs orifices de flamme en forme de fente (5) disposes perpendiculairement par rapport a la paroi d"une chambre de combustion, l"orifice de flamme (4) etant mince a l"extremite et epais dans la partie centrale avec une surface plate de l"orifice de flamme. Un passage (2) est prevu pour alimenter en air secondaire la partie centrale de l"orifice de flamme. Un tel bruleur presente une mauvaise inflammabilite ou produit un bruit de resonnance. Lorsque la flamme formee a l"orifice de flamme (5) est une petite flamme d"allumage, on obtient effectivement un allumage, mais il se produit un bruit de resonnance. Lorsque la flamme formee a l"orifice de flamme (5) est une grande flamme d"allumage, l"allumage se deteriore mais il ne se produit pas de bruit resonnant. Le bruleur du type a premelange de cette invention vise a resoudre ce probleme. Une projection (41) formant un espace (42) devenant l"orifice de flamme est prevue entre la paroi (15) de la chambre de combustion et la surface de l"orifice de flamme au voisinage de la paroi (15) pour former la flamme d"allumage a l"orifice d"allumage (5) a l"exception de l"espace (42) de maniere a ameliorer allumage et former la flamme (de preference une grande flamme) pour empecher la turbulence de la flamme d"allumage dans l"espace (42) de maniere a eviter la resonnance.
Designated States:
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)