公开(公告)号：JPH09318405A

公开(公告)日：1997-12-12

申请号：JP13709996

申请日：1996-05-30

Applicant: IMAI YOSHIO

Inventor： HAYAKAWA NARIAKI ,  OMICHI HIDEHIRO

IPC: G01D21/00

Abstract: PROBLEM TO BE SOLVED: To provide a sensor fitting unit incorporating a small fan unit which is structured in a manner that sensing operation of a sensing sensor may be performed properly and effectively so as to prevent the generation of uncomfortable noises when driving the small fan unit and to improve the controllability for an object to be controlled without failing safety and beauty of interior design, when the small fan unit is used. SOLUTION: This unit is provided with a suction port 22 and a discharging port 24 on its front side and a cover member 12 for sealing and engaging a casing 10 on its rear side, and a passage member 30 in which a sensing sensor 28a is fitted corresponding to the suction port 22 on the rear side of the member 12 is communicated, and further a small fan unit 32 is communicated with the outlet side of the member 30. Then a motor for driving the unit 32 is provided with a motor drive controlling circuit to eliminate or muffle noises generated by fan rotation.