BLOW HEAD OF KNAPSACK TYPE POWER SPRAYER

To provide a blow head of a knapsack type power sprayer capable of easily atomizing water droplets accumulated on an inner peripheral face of a tip part of a blow head, and preferably spraying.SOLUTION: A blow head of a knapsack type power sprayer is configured so that, between an outer groove 25 provided on an outer peripheral face 24 of a ring part 19 and extends in an axial direction and an inner peripheral face of a blow head 10, an outside channel 36 is provided. The outside channel 36 and a bottom groove 30 which is provided on a bottom 26 of the ring part 19, communicated with the outer groove 25, extends toward a shaft center of the blow head 10 and communicated with an inner peripheral face 29 of the ring part 19 and is opened inward, are in a negative pressure state. Water droplets accumulated on the inner peripheral face of a tip part 17 of the blow head 10 are drawn by blowing from a fan passing the blow head 10, and the water droplets are caused to flow in the outside channel 36 toward upstream, then the water droplets are sucked from an opening end through the bottom groove 30 and then are atomized by blowing from the fan.SELECTED DRAWING: Figure 5 【課題】噴頭の先端部分の内周面に溜まった水滴を容易に霧化し、より好適な噴霧ができる背負式動力噴霧機の噴頭を提供する。【解決手段】リング部１９の外周面２４に設けられ軸線方向に延びる外溝２５と噴頭１０の内周面との間に外側流路３６を形成し、外側流路３６及び、リング部１９の底面２６に設けられて外溝２５に連通し、噴頭１０の軸心へ向かって延びてリング部１９の内周面２９に連通し内方に開放される底溝３０を、負圧とし、噴頭１０の先端部分１７の内周面に溜まった水滴を、噴頭１０を通るファンからの送風により引っ張り、外側流路３６を上流側へ向かって流し、底溝３０を通して開放端から吸い上げ、ファンからの送風により霧化する。【選択図】図５