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A temperature-controlled electric heating appliance

A technology of electric heating and appliances, applied in the direction of electric heating devices, ohmic resistance heating, ohmic resistance heating components, etc., can solve the problems of large temperature variation coefficient of heating elements, low temperature control accuracy, and many components, and achieve temperature variation coefficient The effect of low requirements, high safety performance and powerful functions

Inactive Publication Date: 2016-08-17
JIUJIANG KERUITE CONTROL TEMPERATURE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a temperature-controlled electric heating appliance, which solves the problems of many components, low temperature control accuracy, large temperature variation coefficient of heating elements, and complicated production.

Method used

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  • A temperature-controlled electric heating appliance
  • A temperature-controlled electric heating appliance
  • A temperature-controlled electric heating appliance

Examples

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Embodiment 1

[0040] Example one, Figure 14 It is a half-wave working power supply (heating body and temperature sensing body are combined and the output voltage of the buffer is not adjustable) electrical schematic diagram of the control device, such as Figure 14 As shown, the power supply circuit is divided into 2 circuits, one is composed of step-down capacitor C1, buffer resistor R1, diodes D1 and D2, regulator tube DW, filter capacitor C2, and fuse tube F0, which provide a regulated power supply for the control circuit (this regulator The power supply is a resistance-capacitance step-down voltage, which can provide a larger working current and is suitable for heating elements or films with various temperature coefficients; if the heating elements or films with a large temperature coefficient of change can be powered by a resistive step-down regulated power supply, Such as Picture 10 , Figure 15 Shown); another routing actuator is composed of one-way thyristor V and fuse F0. The thyris...

Embodiment 2

[0044] The second embodiment, the electrical schematic diagram of the full-wave working power supply, such as Picture 12 , 13 , 16, the power supply circuit is divided into two paths, one is composed of routing diodes D1, D2, step-down resistor R2, voltage regulator tube DW, filter capacitor C2, fuse tube F0, and provides a regulated power supply for the control circuit (this regulated power supply is Resistor step-down, the working current provided is only a few milliamperes, which is suitable for heating elements or heating films with large temperature variation coefficients). Another routing diode D2, D2', actuator thyristor V1, V2, and fuse F0 form a bridge Type rectifier circuit, SCRs V1 and V2 are controlled by the control circuit to apply full-wave voltage to the heating element RL.

[0045] Control circuit and half-wave control circuit Figure 14 The principle is basically the same, the difference is Figure 16 The buffer used is Figure 4 Structural form; and Picture 1...

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Abstract

A temperature control electric heating appliance, comprising a heating carrier, a heating element and a control device, the control device including a power supply circuit, a comparison circuit, an output circuit, a sampling circuit and a buffer circuit, the input end of the buffer is connected to the output end of the comparator, and the buffer The output end of the buffer is connected to the input end of the comparator, the other end of the buffer and the heating element is connected to the working ground of the control circuit, the anode of the actuator thyristor is connected to one end of the power supply, one of the cathodes is connected to the heating element, and the other is connected to the input of the comparator through a resistor and a diode terminal, the SCR control pole is connected to the output circuit. It solves the problems that there are many components, the temperature control accuracy is not high, the temperature variation coefficient of the heating element is required to be large, and the production is complicated. It can be widely used in precise temperature control of various electric heating appliances or heating components, such as electric heating blankets, electric heating quilts, hatching mats, various electric heating compresses, various electric heating products, and temperature control devices in other industries.

Description

Technical field [0001] The invention relates to a temperature control electric heating appliance, in particular to a temperature control device for an electric heating appliance that generates heat in the form of wires, films or other structures. Background technique [0002] Existing wire heating (whether the heating element and the temperature sensing body are combined, or the heating body and the temperature sensing body are separated separately) temperature control electric heating appliances adopt a synchronous signal from the power grid in terms of temperature control technology. Control the output high level of the synchronization circuit to provide the operating voltage of the comparator input to set the reference level, and compare it with the comparator input level of the sampling branch, determine the output level state (high or low) of the comparator to determine the actuator (SCR, etc.) working state (on or off), so that the load (heating element) is heated by electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B3/00H05B3/02
Inventor 李木水李江江
Owner JIUJIANG KERUITE CONTROL TEMPERATURE TECH
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