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Electric heater and control device thereof

A technology for electric heaters and control devices, which is applied in the direction of auxiliary controllers with auxiliary heating devices, temperature control using electric methods, etc., and can solve problems such as heaters not working normally, electric heaters being inconvenient, and burned out circuits, etc. , to prevent dry burning damage, short reaction time, and ensure normal operation

Inactive Publication Date: 2012-05-02
张克勇
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Limited by factors such as sensor sensitivity, lifespan, response time, failure rate, etc., control failure often occurs, causing the heater to fail to work normally
[0003] In addition, the characteristics of the existing thick-film electric heaters are rapid heating, depending on the power density, the temperature can reach hundreds of degrees in a few seconds; If it is too high, the circuit will be burned
[0004] In summary, the existing electric heater obviously has inconvenience and defects in actual use, so it is necessary to improve

Method used

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  • Electric heater and control device thereof
  • Electric heater and control device thereof
  • Electric heater and control device thereof

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Embodiment Construction

[0048] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0049] figure 1 The structure of the electric heater of the present invention is shown, the electric heater 100 mainly includes a control device 10 and a heating circuit 20, wherein:

[0050] The heating circuit 20 has a characteristic of positive or negative temperature coefficient of resistance, that is, when the current temperature of the resistor changes, the current resistance value also changes relatively. The heating circuit 20 can be a PTC (Positive Temperature Coefficient Thermistor), NTC (Negative Temperature Coefficient Thermistor) or a thick film heating circuit, preferably a thick fil...

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Abstract

The invention discloses an electric heater and a control device thereof. The electric heater comprises a heating circuit, which is provided with positive or negative resistance temperature coefficient characteristics; and the control device, which further comprises a resistance detection circuit and a heating control circuit, wherein the resistance detection circuit is used for detecting the current resistance value of the heating circuit when the heating circuit works, and the heating control circuit is used for controlling the heating circuit to work according to the current resistance value of the heating circuit. Therefore, the electric heater disclosed by the invention can realize heating control by using the resistance characteristics of the electric heater, so as to ensure that the electric heater can work normally.

Description

technical field [0001] The invention relates to an electric heater, in particular to an electric heater for heating control based on resistance detection and a control device thereof. Background technique [0002] Traditional electric heaters mainly use auxiliary sensors, such as thermistors, mechanical temperature switches, etc., to detect parameters such as sensor resistance or temperature, and then control the heating of the heating circuit. Due to factors such as sensor sensitivity, lifespan, response time, failure rate, etc., control failure often occurs, resulting in the heater not working properly. [0003] In addition, the characteristics of the existing thick-film electric heaters are rapid heating, depending on the power density, the temperature can reach hundreds of degrees in a few seconds; If it is too high, it will burn out the circuit. [0004] In summary, the existing electric heater obviously has inconvenience and defects in actual use, so it is necessary ...

Claims

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Application Information

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IPC IPC(8): G05D23/30
Inventor 白淑龙张克勇
Owner 张克勇
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