Title:
THERMAL TYPE AIR FLOW METER
Document Type and Number:
Japanese Patent JPH04128615
Kind Code:
A
Abstract:
PURPOSE:To lessen the peeling phenomenon of air flow in the back side of a bypass route bridged over in a main air flow route by making the cross-section shape of a route cover be semi-circular or near a wing-shape. CONSTITUTION:Suction air flows divided into suction air 7 which flows in a main air flowing route and a bypass route 3 and suction air 8 which flows in a main air flowing route 4. A heat generating resistor 5 to detect the quantity of the suction air flowing in the route 3 and a resistor 6 which is for correcting the temperature and detects the temperature of the suction air are installed in the route 3 which detects the quantity of suction air, and the suction air 7 which passed the route 3 passes the transverse bypass route 13, passes by the bypass route outlets 11, and joins with main air route 4. By making the route cover 9 have a cross-section shape 9a, the peeling phenomena of air occurring in the back side of the route cover 9 is lessened and ventilation cross-section surface area through which the air of the main air flowing route can be retained and pressure loss in the body 1 is lowered.
Inventors:
KOBAYASHI CHIHIRO
MIYAZAKI ATSUSHI
MIYAZAKI ATSUSHI
Application Number:
JP24752390A
Publication Date:
April 30, 1992
Filing Date:
September 19, 1990
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G01F1/68; G01F1/684; (IPC1-7): G01F1/68
Attorney, Agent or Firm:
Katsuo Ogawa (2 outside)