Patent ID: 6032525
Filing Date: 2000-03-07
Classification: G01F,G01P

Abstract:
A thermosensitive flowmeter for detecting a flow rate of a fluid comprisinga first thermosensitive resistor disposed in a fluid passage for detecting said flow rate of a fluid in said fluid passage;a second thermosensitive resistor disposed in said fluid passage for detecting an atmospheric temperature in said fluid passage;a power supply for supplying a current to said first and second thermosensitive resistors;a first control circuit for controlling a first consuming current flowing to said first thermosensitive resistor so that a heating temperature of said first thermosensitive resistor is made to a predetermined temperature; anda second control circuit for controlling a second consuming current flowing to said second thermosensitive resistor so that the second consuming current is made smaller than the first consuming current by a predetermined ratio,wherein said second control circuit controls the second consuming current in response to a voltage across said first thermosensitive resistor, and includes a diode for controlling said voltage, andat least one terminal of both the terminals of said first and second thermosensitive resistors are commonly connected and formed to said first control circuit.