Title:
SUCTION DEVICE
Document Type and Number:
Japanese Patent JP2022097326
Kind Code:
A
Abstract:
To provide a suction device that is easy to manufacture, can stably form an air curtain surrounding a wide area, and can efficiently suction the surrounded area with strong tornado flow.SOLUTION: A cylindrical blowout flow passage 30 that concentrically surrounds a suction flow passage 10 is provided; from the substantially tangential direction of the outer peripheral circle of the blowout flow passage, a blowout flow introduction passage 40 having a second fan 50 is connected to introduce a blowout flow; and the blowout flow introduced into the cylindrical blowout flow passage 30 is blown out from an annular blowout port 30a while spirally swirling around a cylindrical axis 30f. Further, guides (60, 70, 80) for expanding a blowout flow diameter may be provided.SELECTED DRAWING: Figure 1
Inventors:
HATAKEYAMA AKIHIRO
Application Number:
JP2020210889A
Publication Date:
June 30, 2022
Filing Date:
December 19, 2020
Export Citation:
Assignee:
HATAKEYAMA AKIHIRO
International Classes:
F24F7/08; F04D25/16; F04D29/54; F24F7/06; F24F13/08
Attorney, Agent or Firm:
Yoshikichi Arai