Burner

Abstract

An object of the present invention is to provide a burner such as a two-fluid spray burner which can produce a large amount of combustion exhaust gas with a simple structure, does not cause unburned gas and accidental fire, and furthermore can provide shortened flame and a uniform distribution of the flow rate of the combustion exhaust gas. Accordingly, the burner includes: a cylindrical combustion air passage (15) formed between a two-fluid sprayer (12) and a burner outer cylinder (48) surrounding a periphery of the two-fluid sprayer; a plate (shield plate) (18) separating the combustion air passage and a combustion space portion (13); and a combustion air passage hole (52) provided in the outer periphery of the plate. Combustion air (50) flowing down the combustion air passage is blocked by the plate and introduced to the outer periphery of the plate to be kept away from the two-fluid spray nozzle (38). The combustion air then flows through the combustion air passage hole into the combustion space portion. Furthermore, a first cylinder (16) for delaying supply of the combustion air and a second cylinder (17) for preventing stagnation are provided on the undersurface of the plate. A throttle plate with a passage hole opened in central part is provided in the combustion space portion.

Dependencies are inferred from the claim text.