-
公开(公告)号:US4406617A
公开(公告)日:1983-09-27
申请号:US212706
申请日:1980-11-06
申请人: Yasuo Hirozawa
发明人: Yasuo Hirozawa
CPC分类号: F23D14/30 , F23D14/583
摘要: This invention relates to a pre-mixing type burner suitable for use as a heat source for hot water heater or hot air heater. Conventional premixing type burner of this kind has a flame port section (4) having a multiplicity of slit-like flame ports (5) arranged at a right angle to the wall of a combustion chamber. The flame port (4) has a greater thickness at the central portion than at the end portions and is provided with a flat flame port surface. A passage (2) for supplying secondary air is provided at the central part of the flame port section. This conventional arrangement suffers a disadvantageous poor ignition or generation of resonance noise. If the burner is so designed that a small attached flame is formed at the flame port (5), ignition is improved but resonance noise is produced, and vice versa. The invention was made in view of the problem discussed. Namely, the invention provides a projection (41) on the portion of the flame port surface adjacent to the combustion chamber wall (15) such that, between the projection (41) and the combustion chamber wall (15), there is formed a gap (42) which constitutes a flame port. An attached flame is formed at the portion of the flame port (5) except the portion where the gap (42) is formed, thereby to improve the ignition, while a flame (preferably, a large one) which functions to prevent the perturbation of the attached flame is formed at the gap (42) thereby to prevent the generation of the resonance noise.
摘要翻译: PCT No.PCT / JP80 / 00034 Sec。 371日期:1980年11月6日 102(e)日期1980年11月6日PCT PCT 1980年2月28日PCT公布。 第WO80 / 01945号公报 日本1980年9月18日。本发明涉及一种适合用作热水器或热风加热器的热源的预混合型燃烧器。 这种常规的预混合型燃烧器具有火焰口部分(4),其具有多个与燃烧室的壁成直角布置的狭缝状火焰口(5)。 火焰口(4)在中心部分处具有比在端部处更大的厚度,并且设置有平坦的火焰口表面。 在火焰口部分的中心部分设置用于供应二次空气的通道(2)。 这种常规布置具有不利的点燃或产生谐振噪声的缺点。 如果燃烧器的设计使得在火焰口(5)处形成小的附着火焰,则点燃被改善,但产生共振噪声,反之亦然。 发明是鉴于所讨论的问题。 即,本发明在邻近燃烧室壁(15)的火焰口表面的部分上提供突起(41),使得在突起(41)和燃烧室壁(15)之间形成间隙 (42)构成火焰口。 除了形成间隙(42)的部分之外,在火焰口(5)的部分处形成附接的火焰,从而改善点火,同时具有防止扰动的火焰(优选大的火焰) 附着的火焰形成在间隙(42),从而防止产生共振噪声。