Patent ID: 6061500
Filing Date: 2000-05-09
Classification: A01K,H05B

Abstract:
An electronic heater structure comprising a tube body and a heating wire disposed on a bottom of the interior of the tube body and a temperature controlling circuit, the temperature controlling circuit including a thermosensitive resistor arranged to detect a temperature and to control an activation time of said heating wire,wherein the temperature controlling circuit employs a relay connected to said thermosensitive resistor and arranged to switch on and off in response to changes in resistance of said thermosensitive resistor for controlling whether the heating wire is powered on or off, and wherein an upper cap of the tube body is integrally formed with a projecting chamber in which is placed said thermosensitive resistor, andwhereby except for the heating wire, the temperature controlling circuit itself will not generate high heat and emit electro-magnetic interference and the water temperature can be accurately detected wherein the relay and the thermosensitive resistor are isolated by a circuit board, a mica plate and a high temperature-resistant insulator.