CN201977522U - A heating circuit for electric cooker - Google Patents
A heating circuit for electric cooker Download PDFInfo
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- CN201977522U CN201977522U CN2010206509370U CN201020650937U CN201977522U CN 201977522 U CN201977522 U CN 201977522U CN 2010206509370 U CN2010206509370 U CN 2010206509370U CN 201020650937 U CN201020650937 U CN 201020650937U CN 201977522 U CN201977522 U CN 201977522U
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- power transistor
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- microcontroller
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 5
- 238000005485 electric heating Methods 0.000 claims abstract description 15
- 238000010411 cooking Methods 0.000 claims description 12
- 239000004065 semiconductor Substances 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
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Abstract
A heating circuit for an electric heating cooker comprises an electric heating device, a rectifier bridge, a power supply, a microcontroller, a power transistor and a driving circuit of the power transistor, wherein the input end of the rectifier bridge is connected with an alternating current mains supply, the output end of the rectifier bridge is connected with the input end of the power supply, the output end of the power supply is connected with the input end of the microcontroller, the output end of the microcontroller is connected with the input end of the driving circuit of the power transistor, the output end of the driving circuit of the power transistor is connected with the power transistor, one end of the electric heating device is connected with the power transistor, and. The utility model discloses the reliability is high, has reduced manufacturing cost, has prolonged life.
Description
Technical field
The utility model relates to a kind of heater circuit, relates in particular to a kind of heater circuit that is used for electric-heating cooking utensil.
Background technology
At present, in electric-heating cooking utensil, the control assembly of electrothermal device generally adopts components and parts such as relay, controllable silicon and solid-state relay.Relay belongs to mechanical devices, and volume is big, inconvenience is installed, and service life is limited; Though controllable silicon and solid-state relay volume are less, and the control effect is better, and the production cost height causes the selling price on the market comparatively expensive.
The utility model content
The technical problems to be solved in the utility model provides a kind of reliable and stable work, the heater circuit that is used for electric-heating cooking utensil that production cost is lower.
In order to solve the problems of the technologies described above, the utility model is taked following technical scheme:
A kind of heater circuit that is used for electric-heating cooking utensil, comprise electrothermal device, the drive circuit that also comprises rectifier bridge, power supply, microcontroller, power transistor and this power transistor, described rectifier bridge input is connected with electric main, output is connected with power input, power output end is connected with the microcontroller input, the microcontroller output is connected with the power transistor drive circuit input, power crystal-driven circuit output end is connected with power transistor, and electrothermal device one end is connected with power transistor, the other end is connected with rectification bridge output end.Wherein, power transistor and drive circuit thereof have following two kinds of preferable implementations.
Implementation one, described power transistor are NPN type triode Q1, and this triode Q1 colelctor electrode is connected with electrothermal device one end, base stage is connected with the drive circuit of power transistor, grounded emitter line and this ground wire are connected with the grounding pin of microcontroller simultaneously.The drive circuit of described power transistor comprises positive-negative-positive triode Q2, resistance R 2, resistance R 3, the base stage of triode Q2 is connected with the output of resistance R 3, microcontroller successively, colelctor electrode is connected with the base stage of resistance R 2, triode Q1 successively, the base stage of triode Q2 and inter-collector also are provided with pull-up resistor R4, and resistance R 2 one ends are connected with ground wire by resistance R 1.
Implementation two, described power transistor is N-channel MOS pipe Q3, and the drain electrode of this metal-oxide-semiconductor Q3 is connected with electrothermal device one end, grid is connected with the output of the drive circuit of power transistor, source ground line and this ground wire are connected with the grounding pin of microcontroller simultaneously.The drive circuit of described power transistor comprises resistance R 5, resistance R 6, and resistance R 5 is loaded between microcontroller output and metal-oxide-semiconductor Q3 grid, and resistance R 6 is loaded between microcontroller output and ground wire.
In addition, described electrothermal device can be heating wire or electrothermal tube or electric hot tray or semi-conductor electricity device or infrared electrical part.
The utility model passes through the improvement to the heater circuit of electrothermal device, by the break-make of control drive circuit, realize whether the heating of electrothermal device being controlled, both guaranteed the reliability of heater circuit, effectively reduce production cost again, and prolonged service life.
Description of drawings
The specific embodiment
For the ease of those skilled in the art's understanding, the utility model will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of heater circuit that is used for electric-heating cooking utensil, comprise electrothermal device 1, also comprise rectifier bridge 2, power supply, microcontroller, the drive circuit 4 of power transistor 3 and this power transistor, described rectifier bridge input is connected with electric main 5, output is connected with power input, power output end is connected with the microcontroller input, the microcontroller output is connected with the power transistor drive circuit input, power crystal-driven circuit output end is connected with power transistor, and electrothermal device one end is connected with power transistor, the other end is connected with rectification bridge output end.
Power transistor and drive circuit thereof have following two kinds of preferred embodiments.
Embodiment one, as shown in Figure 2, described power transistor is NPN type triode Q1, and this triode Q1 colelctor electrode is connected with electrothermal device one end, base stage is connected with the drive circuit of power transistor, grounded emitter line and this ground wire are connected with the grounding pin of microcontroller simultaneously.The drive circuit of described power transistor comprises positive-negative-positive triode Q2, resistance R 2, resistance R 3, the base stage of triode Q2 is connected with the output of resistance R 3, microcontroller successively, colelctor electrode is connected with the base stage of resistance R 2, triode Q1 successively, the base stage of triode Q2 and inter-collector also are provided with pull-up resistor R4, and resistance R 2 one ends are connected with ground wire by resistance R 1.
In present embodiment one, rectifier bridge converts electric main to high pressure full-wave direct current electricity, again by power supply high pressure full-wave direct current electricity is converted to+the 5V direct current is used for powering to microcontroller.When the output of microcontroller is high level, positive-negative-positive triode Q2 in the drive circuit is in cut-off state, then NPN type triode Q1 is in cut-off state thereupon, then the end that is connected with triode Q1 of electrothermal device is in suspended state, do not have electric current to pass through electrothermal device, this moment, electrothermal device was in non-heated condition; When the output of microcontroller is low level, positive-negative-positive triode Q2 in the drive circuit is in the saturation conduction state, triode Q2 colelctor electrode is drawn high the base stage level of NPN type triode Q1 by resistance R 2, make triode Q1 be in the saturation conduction state, the end that this moment, electrothermal device was connected with triode Q1 is connected to ground by triode Q1, and the electrothermal device other end and rectification bridge output end connect and compose the loop, have electric current to flow through in the electrothermal device, produce heat and heat.
Embodiment two, as shown in Figure 3, described power transistor is N-channel MOS pipe Q3, and the drain electrode of this metal-oxide-semiconductor Q3 is connected with electrothermal device one end, grid is connected with the output of the drive circuit of power transistor, source ground line and this ground wire are connected with the grounding pin of microcontroller simultaneously.The drive circuit of described power transistor comprises resistance R 5, resistance R 6, and resistance R 5 is loaded between microcontroller output and metal-oxide-semiconductor Q3 grid, and resistance R 6 is loaded between microcontroller output and ground wire.
In present embodiment two, when the microcontroller output is low level, resistance R 2 is changed to low level with the grid of N-channel MOS pipe Q3, metal-oxide-semiconductor Q3 is in cut-off state, the end board suspended state that is connected with the drain electrode of metal-oxide-semiconductor Q3 of electrothermal device then, do not have electric current to pass through electrothermal device, this moment, electrothermal device was in non-heated condition; When the microcontroller output is high level, metal-oxide-semiconductor Q3 is in conducting state, because electrothermal device one end is connected with rectification bridge output end, the other end connects and composes the loop by metal-oxide-semiconductor Q3 and ground wire, have electric current to flow through in the electrothermal device this moment, produces heat and heat.
Need to prove, be the utility model preferred embodiment at above-described embodiment, and under the prerequisite that does not break away from inventive concept of the present utility model, any conspicuous replacement is all within protection domain of the present utility model.
Claims (6)
1. heater circuit that is used for electric-heating cooking utensil, comprise electrothermal device (1), it is characterized in that: also comprise rectifier bridge (2), power supply, microcontroller, the drive circuit (4) of power transistor (3) and this power transistor, described rectifier bridge input is connected with electric main (5), output is connected with power input, power output end is connected with the microcontroller input, the microcontroller output is connected with the power transistor drive circuit input, power crystal-driven circuit output end is connected with power transistor, and electrothermal device one end is connected with power transistor, the other end is connected with rectification bridge output end.
2. the heater circuit that is used for electric-heating cooking utensil according to claim 1, it is characterized in that: described power transistor is NPN type triode Q1, and this triode Q1 colelctor electrode is connected with electrothermal device one end, base stage is connected with the drive circuit of power transistor, grounded emitter line and this ground wire are connected with the grounding pin of microcontroller simultaneously.
3. the heater circuit that is used for electric-heating cooking utensil according to claim 2, it is characterized in that: the drive circuit of described power transistor comprises positive-negative-positive triode Q2, resistance R 2, resistance R 3, the base stage of triode Q2 is connected with the output of resistance R 3, microcontroller successively, colelctor electrode is connected with the base stage of resistance R 2, triode Q1 successively, the base stage of triode Q2 and inter-collector also are provided with pull-up resistor R4, and resistance R 2 one ends are connected with ground wire by resistance R 1.
4. the heater circuit that is used for electric-heating cooking utensil according to claim 1, it is characterized in that: described power transistor is N-channel MOS pipe Q3, and the drain electrode of this metal-oxide-semiconductor Q3 is connected with electrothermal device one end, grid is connected with the output of the drive circuit of power transistor, source ground line and this ground wire are connected with the grounding pin of microcontroller simultaneously.
5. the heater circuit that is used for electric-heating cooking utensil according to claim 4, it is characterized in that: the drive circuit of described power transistor comprises resistance R 5, resistance R 6, resistance R 5 is loaded between microcontroller output and metal-oxide-semiconductor Q3 grid, and resistance R 6 is loaded between microcontroller output and ground wire.
6. according to claim 1 or the 2 or 4 described heater circuits that are used for electric-heating cooking utensil, it is characterized in that: described electrothermal device is heating wire or electrothermal tube or electric hot tray or semi-conductor electricity device or infrared electrical part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206509370U CN201977522U (en) | 2010-12-06 | 2010-12-06 | A heating circuit for electric cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206509370U CN201977522U (en) | 2010-12-06 | 2010-12-06 | A heating circuit for electric cooker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201977522U true CN201977522U (en) | 2011-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206509370U Expired - Lifetime CN201977522U (en) | 2010-12-06 | 2010-12-06 | A heating circuit for electric cooker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201977522U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938755A (en) * | 2016-06-02 | 2016-09-14 | 国网江苏省电力公司镇江供电公司 | Drying apparatus for silica gel in transformer ventilator and control method for drying apparatus |
-
2010
- 2010-12-06 CN CN2010206509370U patent/CN201977522U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938755A (en) * | 2016-06-02 | 2016-09-14 | 国网江苏省电力公司镇江供电公司 | Drying apparatus for silica gel in transformer ventilator and control method for drying apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110921 |