CN202234853U - Control circuit of electric cooker - Google Patents
Control circuit of electric cooker Download PDFInfo
- Publication number
- CN202234853U CN202234853U CN2011203381581U CN201120338158U CN202234853U CN 202234853 U CN202234853 U CN 202234853U CN 2011203381581 U CN2011203381581 U CN 2011203381581U CN 201120338158 U CN201120338158 U CN 201120338158U CN 202234853 U CN202234853 U CN 202234853U
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- Prior art keywords
- output
- loop
- power supply
- return circuit
- switching power
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 42
- 239000010703 silicon Substances 0.000 claims abstract description 42
- 230000036772 blood pressure Effects 0.000 claims description 10
- 230000000087 stabilizing effect Effects 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 9
- 241000209094 Oryza Species 0.000 abstract 2
- 235000007164 Oryza sativa Nutrition 0.000 abstract 2
- 235000009566 rice Nutrition 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 1
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- Cookers (AREA)
Abstract
The utility model relates to a control circuit of electric rice cooker, including mains supply, the protection return circuit of being connected with mains supply, the switching power supply return circuit of being connected with the protection return circuit, the step-down steady voltage return circuit of being connected with switching power supply return circuit output, the control chip return circuit of being connected with step-down steady voltage return circuit output, the silicon controlled rectifier drive circuit of being connected with control chip return circuit output, the silicon controlled rectifier of being connected with silicon controlled rectifier drive circuit output and the heater of being connected with the silicon controlled rectifier, wherein the control utmost point G of silicon controlled rectifier is connected with silicon controlled rectifier drive circuit's output, second positive pole T2 and heater connection, a serial communication port the output and the N utmost point of mains supply of switching power supply return circuit are connected, the first positive pole T1 and the output of switching power supply return circuit of silicon. Compared with the prior art, the utility model discloses avoided the integrated device of three-terminal steady voltage to lead to damaging because of the temperature rise is too high, improved the reliability of electric rice cooker product, made automatically controlled board design more easily simultaneously.
Description
Technical field
The utility model relates to a kind of control circuit of electric cooker, belongs to the improvement technology of electric cooker control circuit.
Background technology
At present, prior art electric cooker product, general using controllable silicon drive the action of heater food are heated; Generally be that mains supply passes through reduction voltage loop, loop of voltage regulation successively on the control circuit; Output+5V power supply is for control chip provides working power, for controllable silicon provides trigger current.But because the controllable silicon drive current is bigger, makes that the temperature rise of the three-terminal voltage-stabilizing integrated device in the loop of voltage regulation is too high and occur damaging, cause the properties of product defective.
In order to solve the too high problem of three-terminal voltage-stabilizing integrated device temperature rise, prior art generally increases fin on the three-terminal voltage-stabilizing integrated device, but the electric current of the three-terminal voltage-stabilizing integrated device of flowing through is big more, and it is big more that fin must add, and brings difficulty for the design of automatically controlled plate.
Summary of the invention
The purpose of the utility model is to provide a kind of three-terminal voltage-stabilizing integrated device of can avoiding to cause because of temperature rise is too high damaging, and guarantees that the electric cooker properties of product are reliable, makes the control circuit of the electric cooker that automatically controlled plate designs more easily simultaneously.
The technical scheme of the utility model is: a kind of control circuit of electric cooker; The protection loop that comprise mains supply, is connected, reach the heater that is connected with controllable silicon with protection loop-coupled Switching Power Supply loop, the lowering and stabilizing blood pressure loop that is connected with Switching Power Supply loop output, the control chip loop that is connected with lowering and stabilizing blood pressure loop output, the controllable silicon driving loop that is connected with control chip loop output, the controllable silicon that is connected with controllable silicon driving loop output with mains supply; Wherein silicon controlled control utmost point G is connected with the output that controllable silicon drives the loop; Second plate T2 is connected with heater; The output that it is characterized in that said Switching Power Supply loop is connected with the N utmost point of mains supply, and silicon controlled first anode T1 is connected with the output in Switching Power Supply loop.
Be parallel with protection capacitor C 6 between said silicon controlled control utmost point G and the first anode T1.
Compared with prior art, the utility model utilizes the out-put supply in Switching Power Supply loop for controllable silicon trigger current to be provided, and need not pass through the three-terminal voltage-stabilizing integrator in the lowering and stabilizing blood pressure loop; Therefore; The utility model has reduced the electric current of three-terminal voltage-stabilizing integrator of flowing through, and then has reduced the caloric value of three-terminal voltage-stabilizing integrator, has avoided the three-terminal voltage-stabilizing integrated device to cause because of temperature rise is too high damaging; Improved the electric cooker reliability of products, automatically controlled plate is designed more easily.
Description of drawings
Fig. 1 is the schematic block circuit diagram of the utility model.
Fig. 2 is the circuit diagram of the utility model embodiment.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Show like Fig. 1; The control circuit of present embodiment electric cooker; The protection loop 2 that comprise mains supply 1, is connected with mains supply, with protection loop-coupled Switching Power Supply loop 3, the lowering and stabilizing blood pressure loop 4 that is connected with Switching Power Supply loop output, the control chip loop 5 that is connected with lowering and stabilizing blood pressure loop output, the controllable silicon driving loop 6 that is connected with control chip loop output, the controllable silicon 7 that is connected with controllable silicon driving loop output, the heater 8 that is connected with controllable silicon 7; Wherein controllable silicon 7 comprises first anode T1, second plate T2 and control utmost point G; Control utmost point G is connected with the output that controllable silicon drives loop 6; Second plate T2 is connected with heater 8, and the output in said Switching Power Supply loop 3 is connected with the N utmost point of mains supply, and the first anode T1 of controllable silicon 7 is connected with the output in Switching Power Supply loop 3.
Show like Fig. 2; Said protection loop 2 comprises fuse FUSE, resistance ZNR and capacitor C 1; Fuse FUSE is connected on the effect of playing overcurrent protection in the mains supply L utmost point (live wire); Resistance ZNR is connected in parallel on the two ends of mains supply and plays anti-effect of being struck by lightning, and capacitor C 1 is parallelly connected with resistance ZNR, with the antijamming capability of intensifier circuit;
Filter capacitor C2 and filter capacitor C3 that said Switching Power Supply loop 3 comprises the Switching Power Supply loop, is connected in parallel; The effect in Switching Power Supply loop is the electric main power supply to be converted to+the 12V power supply, and the output in Switching Power Supply loop 3 extremely links to each other with the N of mains supply;
Said lowering and stabilizing blood pressure loop 4 comprises dropping resistor R1, three-terminal voltage-stabilizing integrator U1, the filter capacitor C4 that is connected in parallel and filter capacitor C5; One end of resistance R 1 links to each other with+12V power supply; The other end links to each other with three-terminal voltage-stabilizing integrator U1, three-terminal voltage-stabilizing integrator U1 output+5V power supply;
Said control chip loop 5 by lowering and stabilizing blood pressure loop 4 output+the 5V power supply provides working power, the signal of output control reverse-blocking tetrode thyristor;
Said controllable silicon drives loop 6 and comprises resistance R 2, resistance R 3, resistance R 4 and triode Q1, and an end of resistance R 3 links to each other with the output in control chip loop 5, and the other end links to each other with the base stage of triode Q1; One end of resistance R 4 links to each other with triode Q1 base stage, other end ground connection, and effect is controllable silicon false triggering when preventing that control chip from resetting; The grounded emitter of triode Q1, colelctor electrode links to each other with resistance R 2; The other end of resistance R 2 links to each other with the control utmost point G of controllable silicon 7;
The control utmost point G of said controllable silicon 7 is connected with the other end of the resistance R 2 that drives loop 6, and first anode T1 links to each other with the output+12V power supply in Switching Power Supply loop 3, and second plate T2 links to each other with an end of heater 8; Be parallel with protection capacitor C 6 between the control utmost point G of controllable silicon 7 and the first anode T1;
The other end of said heater 8 extremely links to each other with the L of mains supply.
When the control circuit of present embodiment electric cooker was worked, mains supply 1 is output+12V power supply behind protection loop 2, Switching Power Supply loop 3 successively, again through lowering and stabilizing blood pressure loop 4 back output+5V power supplys; + 5V power supply is that control chip provides working power, when control chip is exported the signal of heater work, drives the triode Q1 conducting in the loop 6; Resistance R 2 ground connection; + 12V power supply is that controllable silicon 7 provides trigger current, controllable silicon 7 conductings, and heater 8 begins energising work.
The trigger current of controllable silicon 7 is provided by+12V power supply in the present embodiment; Need not pass through three-terminal voltage-stabilizing integrator U1; The electric current of three-terminal voltage-stabilizing integrator U1 has reduced to flow through; And then reduced the caloric value of three-terminal voltage-stabilizing integrator U1, and avoided three-terminal voltage-stabilizing integrated device U1 to cause because of temperature rise is too high damaging, improved the electric cooker reliability of products.
Claims (2)
1. the control circuit of an electric cooker; The protection loop (2) that comprise mains supply (1), is connected, reach the heater (8) that is connected with controllable silicon (7) with protection loop-coupled Switching Power Supply loop (3), the lowering and stabilizing blood pressure loop (4) that is connected with Switching Power Supply loop output, the control chip loop (5) that is connected with lowering and stabilizing blood pressure loop output, the controllable silicon driving loop (6) that is connected with control chip loop output, the controllable silicon (7) that is connected with controllable silicon driving loop output with mains supply; Wherein the control utmost point G of controllable silicon (7) is connected with the output that controllable silicon drives loop (6); Second plate T2 is connected with heater (8); The output that it is characterized in that said Switching Power Supply loop (3) is connected with the N utmost point of mains supply, and the first anode T1 of controllable silicon (7) is connected with the output of Switching Power Supply loop (3).
2. according to the control circuit of the said electric cooker of claim 1, it is characterized in that being parallel with protection capacitor C 6 between control utmost point G and the first anode T1 of said controllable silicon (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203381581U CN202234853U (en) | 2011-09-09 | 2011-09-09 | Control circuit of electric cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203381581U CN202234853U (en) | 2011-09-09 | 2011-09-09 | Control circuit of electric cooker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202234853U true CN202234853U (en) | 2012-05-30 |
Family
ID=46096174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203381581U Expired - Lifetime CN202234853U (en) | 2011-09-09 | 2011-09-09 | Control circuit of electric cooker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202234853U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102342758A (en) * | 2011-09-09 | 2012-02-08 | 美的集团有限公司 | Control circuit of electric cooker |
-
2011
- 2011-09-09 CN CN2011203381581U patent/CN202234853U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102342758A (en) * | 2011-09-09 | 2012-02-08 | 美的集团有限公司 | Control circuit of electric cooker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: MIDEA GROUP CO., LTD. Free format text: FORMER NAME: MEIDI GROUP CO. LTD. |
|
| CP03 | Change of name, title or address |
Address after: 528311 Guangdong, Foshan, Beijiao, the United States, the United States and the United States on the avenue of the United States, the headquarters of the United States building B floor, District, 26-28 Patentee after: MIDEA GROUP Co.,Ltd. Address before: 528311 Beijiao, Foshan, Shunde District, the town of Guangdong, the United States Avenue, No. 6 Patentee before: Midea Group |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |
|
| CX01 | Expiry of patent term |