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Electric heater and its control device

A technology of electric heater and control device, which is applied to auxiliary controller with auxiliary heating device, temperature control by electric method, etc., can solve the problems of heater not working normally, electric heater being inconvenient, burning out circuit, etc. , to prevent dry burning damage, short reaction time, and ensure normal work.

Inactive Publication Date: 2011-12-28
张克勇
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  • Summary
  • Abstract
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  • 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 its control device
  • Electric heater and its control device
  • Electric heater and its control device

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Embodiment Construction

[0032] 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.

[0033] 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:

[0034] The heating circuit 20 has positive or negative resistance temperature coefficient characteristics, that is, when the temperature of the heating circuit changes, the current resistance value will also change relatively, and according to Ohm's law, the current current value will also change. The heating circuit 20 can be a PTC (Positive Temperature Coefficient Thermistor), NTC (Negative Temperature Coefficient...

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Abstract

The invention discloses an electric heater and a control device thereof. The electric heater includes: a heating circuit having positive or negative resistance temperature coefficient characteristics; a control device further comprising a current detection circuit and a heating control circuit: the current The detection circuit is used to detect the current current value of the heating circuit when the heating circuit is working; the heating control circuit is used to control the heating circuit to work according to the current current value of the heating circuit. Thereby, the electric heater of the present invention can realize heating control by utilizing its own resistance characteristics, so as to ensure the normal operation of the electric heater.

Description

technical field [0001] The invention relates to an electric heater, in particular to an electric heater and a control device for heating control based on current detection. 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 to improve ...

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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