Patent ID: 7718136

Claim:
A microparticle diffusing apparatus comprising: a microparticle generating apparatus that generates microparticles from a microparticle generating part; and a wind-blowing path which conveys the microparticles generated by the microparticle generating apparatus and that discharges the conveyed microparticles from a blowout opening located at an end of the wind-blowing path, wherein, the wind-blowing path gradually decreases in height and also gradually increases in width as the wind-blowing path extends from the microparticle generating part to the blowout opening, an aspect ratio of a cross section of the wind-blowing path gradually increases as the wind-blowing path extends from the microparticle generating part to the blowout opening, and an aspect ratio AR of a cross section of the blowout opening in the wind-blowing path is in a range of 2≦AR≦20.