A flat plate thick film heater and its preparation process

Abstract

The invention discloses a flat plate thick-film heater and a preparation process thereof. The heater comprises a circular base plate, a thick-film heating layer as a heating element set on the lower surface of the circular base plate, and a The through hole and the support cap arranged on the upper surface of the circular base plate, a heat generating area is arranged between the peripheral edge close to the circular base plate and the through hole, and an insulating protective film layer is printed on the surface of the thick film heat generating layer, The support cap protrudes upwards from the edge of the through hole, and the open end of the support cap is fixed to the through hole by welding. The process is to mold the circular base plate into a circular plate surface structure, and reserve The functional layer is printed in the printed area, and the NTC thermistor is lapped in the printed area on the insulating thick film heat conduction layer. The heater of the present invention has simple structure, simple production process and fast heating time, which can ensure the stability and reliability of the resistance layer structure, greatly save the heating time, and solve the problem that the stirring knife is difficult to disassemble and clean.

Description

technical field [0001] The invention belongs to the technical field of thick-film heaters, and in particular relates to a flat-plate thick-film heater and a preparation process thereof. Background technique [0002] Thick film heater (heater) is a new type of heating device that adopts thick film screen printing process to print insulating medium, heating resistor and heat conductor and other materials on the substrate, and sinters at high temperature. It is widely used in electric kettles, electric coffee Kettle, electric milk churn, electric water heater, electric hair board, electric iron, etc. Compared with the traditional electric heating wire heater, the thick film heater has the characteristics of high power density, good thermal conductivity, large heat dissipation area and high safety performance. [0003] The thick-film heater used in the traditional milk churn is not designed with a special stirring tool, so that the milk churn can only be stirred alone, and the ...

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Problems solved by technology

[0003] The thick-film heater used in the traditional milk churn is not designed with a special stirring tool, so that the milk churn can only be stirred alone, and the stirring and heating can not be performed well at the same time, so the use effect is not good and cannot satisfy People's needs; due to the small space used by the thick film heater, the heat exchange of the thick film heater is limited to one surface of the heating plate, and the temperature of the center heating is often inconsistent with the heating temperature of the edge, resulting in the entire heater. Heating is uneven, therefore, a thick film heater for a safer milk churn needs to be designed

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