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Constant-temperature heating circuit

A technology of constant temperature heating and heating resistance wire, applied in electrical components, electric heating devices, etc., can solve the problems of low power and low heating power, and achieve the effect of high efficiency, large heating power and small impact

Inactive Publication Date: 2015-04-29
CHONGQING SANGNAIMEI PHOTOELECTRIC TECH
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  • Description
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AI Technical Summary

Problems solved by technology

[0002] In the existing constant temperature heating circuit, the thermistor is directly connected to the heating main circuit. When the temperature gradually increases, the resistance also increases, which will limit the heating current. When the current is small, the heating element will be affected, so that the power Low, low heating power

Method used

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Embodiment Construction

[0009] In order to make the technical means, creative features, goals and functions achieved by the present invention clearer and easier to understand, the present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0010] As shown in Figure 1, the present invention includes a first heating resistance wire R1, a second resistance R2, a third resistance R3, a fourth resistance R4, a fifth heating resistance wire R5, a first triode Q1, a second triode Q2 and the thermistor RX, wherein, the collector of the second triode Q2 is connected to the positive pole of the DC power supply through the first heating resistance wire R1, and the base set of the second triode Q2 is sequentially passed through the third resistor R3, The second resistor R2 and the first heating resistance wire R1 are connected to the positive pole of the DC power supply, and the base set of the second triode Q2 is connected to the negative pole of...

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Abstract

A constant-temperature heating circuit comprises a first heating resistance wire R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth heating resistance wire R5, a first triode Q1, a second triode Q2 and a thermosensitive resistor RX, wherein the base electrode of the first triode Q1 is connected to a connecting wire between the second resistor R2 and the third resistor R3 through a constant-current circuit A. Due to adoption of the technical scheme, a condition that the thermosensitive resistor is directly connected to a heating main loop is avoided, so that the constant-temperature heating circuit is high in heating power and high in efficiency, and influence of a heating element in low current is small.

Description

technical field [0001] The invention relates to a heating circuit, in particular to a constant temperature heating circuit. Background technique [0002] In the existing constant temperature heating circuit, the thermistor is directly connected to the heating main circuit. When the temperature gradually increases, the resistance also increases, which will limit the heating current. When the current is small, the heating element will be affected, so that the power Low, the heating power is low. Contents of the invention [0003] The object of the present invention is to provide a constant temperature heating circuit, which avoids connecting the thermistor directly to the heating main circuit, and the heating element is less affected when the current is small. [0004] The object of the present invention is achieved by adopting the following technical scheme, which includes the first heating resistance wire R1, the second resistance R2, the third resistance R3, the fourth ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B1/02
Inventor 吴海龙
Owner CHONGQING SANGNAIMEI PHOTOELECTRIC TECH
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