Venturi nozzle and fuel supply device comprising venturi nozzle for controlling a ratio between a fuel gas and an air flow
A venturi nozzle (1), disposed upstream from a blower (20), for mixing combustion air and fuel gas by intake pressure of the blower (20), comprising: a nozzle portion (12) with a shape that is narrowed in diameter downstream and into which combustion air is introduced; a mixing portion (13), disposed downstream from the nozzle portion (12), with a shape that is enlarged in diameter downstream and into which combustion air and fuel gas are mixed; and a fuel gas inlet (15), disposed between the nozzle portion (12) and the mixing portion (13), into which fuel gas is introduced; wherein a plurality of ridges (16) extending in a circumferential direction and arranged at predetermined intervals in a flow direction of combustion air are formed on an inner surface of the nozzle portion (12).
MIURA CO., LTD.
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Shigehiro Makoto Tatsuya
Watanabe Shiba Fujiwara