Patent ID: 6679114
Filing Date: 2004-01-20
Classification: G01F

Abstract:
A thermosensitive flow rate sensor comprising:a detecting element comprising: a flat substrate; a heating element and a fluid temperature detector each made of a thermosensitive resistor film and formed so as to be separated from each other on a surface of said flat substrate; and a flow rate detection diaphragm formed by partially removing said flat substrate from a rear surface side under a region where said heating element is formed; and a support having a recess portion for housing said detecting element formed on a surface thereof, said support being disposed such that the surface is inclined at a predetermined angle relative to a direction of flow of a fluid being measured, wherein said detecting element is housed inside said recess portion and supported by said support such that a surface of said detecting element is positioned generally in a common plane with the surface of said support and such that a direction of alignment of said heating element and said fluid temperature detector is perpendicular to the direction of flow of said fluid being measured, and a groove having a groove direction lying in the direction of flow of said fluid being measured is formed in said support so as to pass under a region where said fluid temperature detector of said detecting element is formed.