Temperature measurement feedback electromagnetic induction heating body based on thick film technology

Abstract

The invention discloses a thick film technology-based temperature measurement feedback electromagnetic induction heating body, which comprises an eddy current heating body base material, wherein the eddy current heating body base material generates heat through changed current in an electromagnetic coil, an insulating coupling material layer is arranged on the surface of the eddy current heating body base material, a thermistor wire layer is arranged on the surface of the insulating coupling material layer, the insulating coupling material layer relatively insulates and isolates the thermistorwire layer from the eddy current heating body base material while a good attachment effect is generated, the thermistor wire layer is located on a loop of a sensor circuit, the resistance value of the thermistor wire layer changes along with the temperature, and the sensor circuit detects the temperature according to the change of the resistance value of the thermistor wire layer. The thermistorwire layer directly detects the temperature of the eddy current heating body base material, so that the temperature can be accurately detected in real time, and the detection is direct compared with the detection of the temperature of a heated object.

Description

Technical field [0001] The invention relates to the technical field of electromagnetic induction heating, and further relates to a temperature measurement feedback electromagnetic induction heating element based on thick film technology. Background technique [0002] The electromagnetic induction heating device currently on the market is composed of electromagnetic coil + eddy current heating element, the eddy current heating element of the cylindrical coil is placed in the middle of the coil, and the eddy current heating element of the planar coil is placed on the upper or lower part of the coil. The alternating current generated by the induction heating power supply passes through the electromagnetic coil to generate an alternating magnetic field. The eddy current heating element is placed in its magnetic field to cut the alternating magnetic lines of force, and an alternating current (ie, eddy current) is generated inside the eddy current heating element to heat it. Objects in...

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Problems solved by technology

[0004] This temperature control method belongs to indirect measurement, which has the problems of long response time and large measurement error, and it is difficult to achieve accurate temperature feedback; at the same time, because the thermocouple is generally made of metal, it is easily affected by the magnetic field of the electromagnetic coil, and its reliability is low. The temperature measurement method is single-point temperature measurement, and the phenomenon of uneven temperature distribution cannot be effectively identified

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