Patent ID: 6647777
Filing Date: 2003-11-18
Classification: F23D,F23K,F23N,G01F

Abstract:
A flow rate sensor comprising:a flow rate detector having a heating function and a temperature sensing function; a pipe line for fluid to be detected which is formed so that heat from said flow rate detector is transferred to and absorbed by the fluid, wherein the temperature sensing which is affected by a heat absorption effect of the fluid due to the heat is executed in said flow rate detector, and the flow rate of the fluid in said pipe line is detected on the basis of the temperature sensing result; and a heat transfer member provided to said flow rate detector and extending into the inside of said pipe line in a direction about traversing a median of said pipe line, wherein said heat transfer member is formed so as to extend to at least the vicinity of the central portion on the cross-section of said pipe line; wherein said flow rate detector is located outside said pipe line, and the dimension of said heat transfer member in the direction of fluid flow in said pipe line is larger than the dimension of said heat transfer member in a direction perpendicular to the extending direction of said heat transfer member on the cross-section of said pipe line and perpendicular to the direction of fluid flow in said pipe line.