CN104582015A - Constant-temperature heating circuit - Google Patents
Constant-temperature heating circuit Download PDFInfo
- Publication number
- CN104582015A CN104582015A CN201410792757.9A CN201410792757A CN104582015A CN 104582015 A CN104582015 A CN 104582015A CN 201410792757 A CN201410792757 A CN 201410792757A CN 104582015 A CN104582015 A CN 104582015A
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- triode
- resistance
- constant
- power supply
- hot water
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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
The present invention relates to a kind of heater circuit, particularly a kind of heated at constant temperature circuit.
Background technology
In existing heated at constant temperature circuit, thermistor is connected directly between on heating major loop, and when temperature raises gradually, resistance, also along with increase, can limit heating current, and the impact that during small area analysis, heating element will be subject to makes power low, and the power of heating is lower.
Summary of the invention
The object of this invention is to provide a kind of heated at constant temperature circuit, it avoids directly being connected on by thermistor on heating major loop, and the impact that heating element is subject to when small area analysis is little.
The object of the invention is to realize by the following technical solutions, it comprises the first resistive heater R1, second resistance R2, 3rd resistance R3, 4th resistance R4, slender acanthopanax hot water radiation wire R5, first triode Q1, second triode Q2 and thermistor RX, wherein, the collector electrode of the second triode Q2 is connected with the positive pole of DC power supply by the first resistive heater R1, the basis set one of the second triode Q2 is successively by the 3rd resistance R3, second resistance R2 and the first resistive heater R1 is connected with the positive pole of DC power supply, the basis set two of the second triode Q2 is connected with the negative pole of DC power supply by the 4th resistance R4 and slender acanthopanax hot water radiation wire R5 successively, the basis set three of the second triode Q2 is connected with the collector electrode of the first triode Q1, the emitter of the second triode Q2 is connected with the negative pole of DC power supply by slender acanthopanax hot water radiation wire R5, the emitter of the first triode Q1 is connected with the negative pole of DC power supply by slender acanthopanax hot water radiation wire R5, the basis set of the first triode Q1 is connected with the negative pole of DC power supply by thermistor RX and slender acanthopanax hot water radiation wire R5 successively, the basis set of the first triode Q1 connects the output of constant-current circuit A, constant-current circuit A input is connected in the wiring between the second resistance R2 and the 3rd resistance R3.
After being energized by DC power supply in main circuit in the present invention, second triode Q2 conducting, first triode Q1 will disconnect, and the first resistive heater R1 and slender acanthopanax hot water radiation wire R5 will generate heat, and make temperature reach set point, when thermistor RX reaches 0.7V, resistance becomes large, the first triode Q1 conducting, and the second triode Q2 disconnects, 4th resistance (R4) also will disconnect, and make the first resistive heater R1 and slender acanthopanax hot water radiation wire R5 that heating is stopped heating.Second triode Q2 controls the break-make in leading back, thermistor is not connected on heating major loop by it, but by constant current source power supply, is connected to b, e pole of triode, whether reach the switch motion controlling triode according to set temperature value, control to heat major loop with this.Because the operating current of control loop is very little, such as 1ma, when major loop flows through this electric current, very I is negative slightly disregards for caloric value.The benefit brought like this is temperature precise control, fluctuates little.The basis set of the output termination first triode Q1 of constant-current circuit.
Owing to have employed technique scheme, present invention, avoiding and be directly connected on heating major loop by thermistor, heating power is large, and efficiency is high, and the impact that heating element is subject to when small area analysis is little.
Accompanying drawing explanation
Accompanying drawing of the present invention is described as follows.
Fig. 1 circuit theory diagrams of the present invention.
Embodiment
The technological means realized to make the present invention, creation characteristic, reach object and effect clearly and be easy to understand, below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.
As shown in Figure 1, the present invention includes the first resistive heater R1, second resistance R2, 3rd resistance R3, 4th resistance R4, slender acanthopanax hot water radiation wire R5, first triode Q1, second triode Q2 and thermistor RX, wherein, the collector electrode of the second triode Q2 is connected with the positive pole of DC power supply by the first resistive heater R1, the basis set one of the second triode Q2 is successively by the 3rd resistance R3, second resistance R2 and the first resistive heater R1 is connected with the positive pole of DC power supply, the basis set two of the second triode Q2 is connected with the negative pole of DC power supply by the 4th resistance R4 and slender acanthopanax hot water radiation wire R5 successively, the basis set three of the second triode Q2 is connected with the collector electrode of the first triode Q1, the emitter of the second triode Q2 is connected with the negative pole of DC power supply by slender acanthopanax hot water radiation wire R5, the emitter of the first triode Q1 is connected with the negative pole of DC power supply by slender acanthopanax hot water radiation wire R5, the basis set of the first triode Q1 is connected with the negative pole of DC power supply by thermistor RX and slender acanthopanax hot water radiation wire R5 successively, the basis set of the first triode Q1 connects the output of constant-current circuit A, constant-current circuit A input is connected in the wiring between the second resistance R2 and the 3rd resistance R3.
After being energized by DC power supply in main circuit in the present invention, second triode Q2 conducting, first triode Q1 will disconnect, and the first resistive heater R1 and slender acanthopanax hot water radiation wire R5 will generate heat, and make temperature reach set point, when thermistor RX reaches 0.7V, resistance becomes large, the first triode Q1 conducting, and the second triode Q2 disconnects, 4th resistance (R4) also will disconnect, and make the first resistive heater R1 and slender acanthopanax hot water radiation wire R5 that heating is stopped heating.Second triode Q2 controls the break-make in leading back, thermistor is not connected on heating major loop by it, but by constant current source power supply, is connected to b, e pole of triode, whether reach the switch motion controlling triode according to set temperature value, control to heat major loop with this.Because the operating current of control loop is very little, such as 1ma, when major loop flows through this electric current, very I is negative slightly disregards for caloric value.The benefit brought like this is temperature precise control, fluctuates little.The basis set of the output termination first triode Q1 of constant-current circuit.
Claims (1)
1. a heated at constant temperature circuit, it is characterized in that: comprise the first resistive heater (R1), second resistance (R2), 3rd resistance (R3), 4th resistance (R4), slender acanthopanax hot water radiation wire (R5), first triode (Q1), second triode (Q2) and thermistor (RX), wherein, the collector electrode of the second triode (Q2) is connected with the positive pole of DC power supply by the first resistive heater (R1), the basis set one of the second triode (Q2) is successively by the 3rd resistance (R3), second resistance (R2) and the first resistive heater (R1) are connected with the positive pole of DC power supply, the basis set two of the second triode (Q2) is connected with the negative pole of DC power supply by the 4th resistance (R4) and slender acanthopanax hot water radiation wire (R5) successively, the basis set three of the second triode (Q2) is connected with the collector electrode of the first triode (Q1), the emitter of the second triode (Q2) is connected with the negative pole of DC power supply by slender acanthopanax hot water radiation wire (R5), the emitter of the first triode (Q1) is connected with the negative pole of DC power supply by slender acanthopanax hot water radiation wire (R5), the basis set of the first triode (Q1) is connected with the negative pole of DC power supply by thermistor (RX) and slender acanthopanax hot water radiation wire (R5) successively, the basis set of the first triode (Q1) connects the output of constant-current circuit A, constant-current circuit A input is connected in the wiring between the second resistance (R2) and the 3rd resistance (R3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410792757.9A CN104582015A (en) | 2014-12-19 | 2014-12-19 | Constant-temperature heating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410792757.9A CN104582015A (en) | 2014-12-19 | 2014-12-19 | Constant-temperature heating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104582015A true CN104582015A (en) | 2015-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410792757.9A Pending CN104582015A (en) | 2014-12-19 | 2014-12-19 | Constant-temperature heating circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN104582015A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106812053A (en) * | 2017-03-29 | 2017-06-09 | 湖南高福星智能科技有限公司 | A kind of bituminous paving prosthetic appliance |
-
2014
- 2014-12-19 CN CN201410792757.9A patent/CN104582015A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106812053A (en) * | 2017-03-29 | 2017-06-09 | 湖南高福星智能科技有限公司 | A kind of bituminous paving prosthetic appliance |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |