CN202973221U - Microwave oven and standby control circuit thereof - Google Patents
Microwave oven and standby control circuit thereof Download PDFInfo
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- CN202973221U CN202973221U CN 201220493692 CN201220493692U CN202973221U CN 202973221 U CN202973221 U CN 202973221U CN 201220493692 CN201220493692 CN 201220493692 CN 201220493692 U CN201220493692 U CN 201220493692U CN 202973221 U CN202973221 U CN 202973221U
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Abstract
The utility model belongs to the field of household appliances, and particularly relates to a microwave oven and a standby control circuit thereof. After the microwave oven is conductive with a power supply, a transformer and a power supply IC in the standby control circuit supply power for an MCU (Microprogrammed Control Unit) of a single chip computer, so that the normal work of the single chip computer is driven. When the normal work of the microwave is completed, the microwave oven can enter a standby state through a standby function key on a control panel or time preset by a software program, namely the power supply of the MCU of the single chip computer is cut off. According to the microwave oven, other parts do not consume power except that the power supply IC works under an energy-saving mode, thereby achieving the requirement in a zero-watt standby state.
Description
Technical field
The utility model belongs to household appliance technical field, relates in particular to a kind of micro-wave oven and readiness control circuit thereof.
Background technology
In prior art, micro-wave oven major part when not using is all to be in holding state.Generally, use the standby power of the micro-wave oven of linear transformer to be 2W; And use the standby power of the micro-wave oven of Switching Power Supply to be 1W.These two kinds of micro-wave ovens can not realize that all zero watt standby (stipulates according to international standard, electric appliance standby power is less than the zero watt standby of can being called of 5mW), also just can not satisfy modern society to the more and more higher efficiency of household electrical appliance proposition and the requirement of environmental protection, solve above-mentioned technical problem therefore be badly in need of the micro-wave oven of a kind of zero energy standby of invention.
The utility model content
The purpose of this utility model is to provide a kind of readiness control circuit of micro-wave oven, can not realize zero watt standby to solve micro-wave oven in prior art, can not satisfy the technical problem of efficiency and environmental requirement.
To achieve these goals, the technical solution adopted in the utility model is:
A kind of readiness control circuit of micro-wave oven, the output and the resistance R between ground 1 that comprise the first rectification filtering unit that is connected with alternating current, the switch transformer that is connected with described the first rectification filtering unit, the second input that is connected to described switch transformer and the power supply IC between ground, the Rectified alternating current of described switch transformer output is processed and driven the second rectification filtering unit of single-chip microprocessor MCU and is connected to described the second rectification filtering unit, as improvement, described readiness control circuit also comprises:
The resistance R 2 that the first input end of first end and described power supply IC joins; And the arousal function K switch 1 that is connected between second end and ground of described resistance R 2, carries out folding according to user's touch-control.
Further, described readiness control circuit also comprises:
First end is connected with the second input of described power supply IC, the resistance R 3 of the second described single-chip microprocessor MCU output of termination; And the idle function K switch 2 that is connected between second end and ground of described resistance R 3, carries out folding according to user's touch-control.
Further, be connected with an isolated component between described resistance R 3 and described single-chip microprocessor MCU.Described isolated component is specifically as follows optocoupler; The output of the described single-chip microprocessor MCU of input termination of described optocoupler, the second end of the described resistance R 3 of output termination of described optocoupler, the earth terminal ground connection of described optocoupler.
Particularly, described the first rectification filtering unit comprises rectifier bridge BR1 and electrochemical capacitor E1;
Two inputs of described rectifier bridge BR1 connect respectively alternating current, the earth terminal ground connection of described rectifier bridge BR1, the first input end of the described switch transformer of output termination of described rectifier bridge BR1, described electrochemical capacitor E1 is connected between the output and ground of described rectifier bridge BR1.
More specifically, described the second rectification filtering unit comprises diode D1 and electrochemical capacitor E2;
The anode of described diode D1 connects the output of described switch transformer, and the negative electrode of described diode D1 is the output of described the second rectification filtering unit, and described electrochemical capacitor E2 is connected between the negative electrode and ground of described diode D1.
Another purpose of the present utility model is to provide a kind of micro-wave oven, described micro-wave oven has comprised the readiness control circuit of above-mentioned any form, and have on the control panel of described micro-wave oven the arousal function button corresponding with described arousal function K switch 1 or respectively with arousal function button corresponding to described arousal function K switch 1 and the idle function button corresponding with idle function K switch 2.
Particularly, the function button on described control panel is electronic switch, change-over switch and/or the microswitch that comprises touch-switch.
The utility model embodiment provides a kind of micro-wave oven and readiness control circuit thereof.The micro-wave oven that the utility model provides, after the fire door of micro-wave oven was closed, switched on power, the transformer in readiness control circuit and power supply IC began to the single-chip microprocessor MCU power supply, to drive normal operation.After the micro-wave oven normal operation is completed, can enter holding state by the idle function button on control panel or default time of software program: the power supply that namely cuts off single-chip microprocessor MCU.In the micro-wave oven of this moment, working under battery saving mode except power supply IC, other parts are consumed power not, has namely reached the requirement of zero watt standby.
Description of drawings
Fig. 1 is the structured flowchart of the readiness control circuit of the micro-wave oven that provides of the utility model the first embodiment;
Fig. 2 is the structured flowchart of the readiness control circuit of the micro-wave oven that provides of the utility model the second embodiment;
Fig. 3 is the example electronic devices and components figure of Fig. 2;
Fig. 4, Fig. 5 are the structural representations of the micro-wave oven that provides of the utility model embodiment.
The specific embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
The utility model embodiment provides a kind of micro-wave oven and readiness control circuit thereof, by this readiness control circuit, makes the real realization zero watt standby of micro-wave oven.
Fig. 1 is the structured flowchart of the readiness control circuit of the micro-wave oven that provides of the utility model the first embodiment; For convenience of explanation, only show the relevant content of the present embodiment.As shown in the figure:
As the first embodiment of the present utility model, the readiness control circuit of this micro-wave oven comprises: the first rectification filtering unit 100, switch transformer 200, power supply IC300, the second rectification filtering unit 400, resistance R 1, resistance R 2 and arousal function K switch 1; Wherein, the first rectification filtering unit 100 directly is connected with alternating current, the first input end of its output termination switch transformer 200, the output of the second input termination power IC300 of switch transformer 200, the second rectification filtering unit 400 is connected between the output and single-chip microprocessor MCU of switch transformer 200, resistance R 1 is connected between the output and ground of the second rectification filtering unit 400, the first input end of the first termination power IC of resistance R 2, arousal function K switch 1 are connected between second end and ground of resistance R 2.
Export high direct voltage after the rectifying and wave-filtering of alternating current through the first rectification filtering unit 100, output ripple direct current after 200 couplings of power supply IC300 gauge tap transformer, then comprised that the computer board of single-chip microprocessor MCU provides dc source VCC after the second rectification filtering unit 400 and resistance R 1 processing.After the user finishes using, micro-wave oven need to enter standby mode, single-chip microprocessor MCU sends instructions to the Opportunity awaiting control for linear key of power supply IC300, power supply IC300 accepts to enter battery saving mode after the instruction of single-chip microprocessor MCU, export without dc source VCC this moment, single-chip microprocessor MCU is not worked, and only has very little electric current power supply source IC300 intermittently to detect the signal of arousal function K switch 1.When the external world inputted wake-up signal by arousal function K switch 1, power supply IC300 restarts work: the gauge tap transformer 200 output DC source VCC provided operating voltage to single-chip microprocessor MCU, and the computer board control system withdraws from standby electricity-saving mode.
The readiness control circuit of the micro-wave oven that basis the first embodiment as shown in Figure 1 provides when specific implementation, can also comprise that first end is connected with the second input of power supply IC300, the resistance R 3 of the second termination single-chip microprocessor MCU output; And the idle function K switch 2 that is connected between second end and ground of resistance R 3, carries out folding according to user's touch-control.That is to say, add an idle function K switch 2, can make the user by pressing the idle function button of idle function K switch 2 correspondences, realize manually making micro-wave oven enter standby electricity-saving mode.
Fig. 2 is the structured flowchart of the readiness control circuit of the micro-wave oven that provides of the utility model the second embodiment; Same, for convenience of explanation, only show the relevant content of the present embodiment.As shown in the figure:
As the second embodiment of the present utility model, the readiness control circuit difference that provides with the first embodiment shown in Figure 1 only is to also have an isolated component 500 between power supply IC300 and single-chip microprocessor MCU.In the present embodiment, this isolated component 500 can be optocoupler.The input of isolated component 500 connects the output of single-chip microprocessor MCU, the output connecting resistance R3 of isolated component 500 and idle function K switch 2 connect altogether end, the earth terminal ground connection of isolated component 500.Of particular note, isolated component 500 may be components and parts or the components and parts combination of other classifications, and optocoupler herein is only an example, is not used in the classification that limits isolated component 500.
Fig. 3 is the example electronic devices and components figure of Fig. 2.As shown in the figure:
The first rectification filtering unit 100 comprises rectifier bridge BR1 and electrochemical capacitor E1: two inputs of rectifier bridge BR1 all connect alternating current, the first input end of the earth terminal ground connection of rectifier bridge BR1, output termination switch transformer 200, electrochemical capacitor E1 is connected between the output and ground of rectifier bridge BR1;
The second 400 of rectification filtering units comprise diode D1 and electrochemical capacitor E2; The anode of diode D1 connects the output of switch transformer 200, and the negative electrode of diode D1 is the output of the second rectification filtering unit 400, and electrochemical capacitor E2 is connected between the negative electrode and ground of diode D1;
Isolated component 500 is optocoupler, and the input of optocoupler connects the output of single-chip microprocessor MCU, the output connecting resistance R3 of optocoupler and idle function K switch 2 connect altogether end, the earth terminal ground connection of optocoupler.
The utility model embodiment also provides a kind of micro-wave oven, and Fig. 4 and Fig. 5 are the structural representations of the micro-wave oven that provides of the utility model embodiment.As shown in the figure: this kind micro-wave oven outside comprises a control panel, and microwave oven internal also comprises the circuit board 10 of the readiness control circuit that the above-mentioned several embodiment of application provide, and have an arousal function button K1 ' (as shown in Figure 4) corresponding with arousal function K switch 1 on its control panel, perhaps have simultaneously respectively the arousal function button K1 ' corresponding with arousal function K switch 1 and the idle function button K2 ' (as shown in Figure 5) corresponding with idle function K switch 2.
When specific implementation, the function button on control panel includes but not limited to touch-switch, change-over switch, microswitch and electronic switch.
After this kind micro-wave oven switches on power, export high direct voltage after the rectifying and wave-filtering of alternating current through the first rectification filtering unit, output ripple direct current after power supply IC gauge tap is transformer coupled, then comprised that the computer board of single-chip microprocessor MCU provides dc source VCC after the second rectification filtering unit and resistance processing.After the user finishes using, can enter holding state by the idle function button on control panel or through after the time (such as N minute) of program setting.Single-chip microprocessor MCU sends instructions to the Opportunity awaiting control for linear key of power supply IC, power supply IC accepts to enter battery saving mode after the instruction of single-chip microprocessor MCU, export without dc source VCC this moment, namely cut off the power supply of single-chip microprocessor MCU, make single-chip microprocessor MCU not work, only have very little electric current power supply source IC intermittently to detect the signal of arousal function K switch 1.When the external world inputted wake-up signal by arousal function K switch 1, power supply IC restarts work: gauge tap transformer output DC source VCC provided operating voltage to single-chip microprocessor MCU, and the computer board control system withdraws from standby electricity-saving mode.
The micro-wave oven that the utility model provides, after switching on power, the transformer in readiness control circuit and power supply IC begin to the single-chip microprocessor MCU power supply, to drive normal operation.After the micro-wave oven normal operation is completed, can enter holding state by the idle function button on control panel or default time of software program: the power supply that namely cuts off single-chip microprocessor MCU.In the micro-wave oven of this moment, working under battery saving mode except power supply IC, other parts are consumed power not, has namely reached the requirement of zero watt standby.
The above is only preferred embodiment of the present utility model, not in order to limit the utility model, although with reference to previous embodiment, the utility model has been carried out more detailed explanation, for a person skilled in the art, it still can be modified or part technical characterictic wherein is equal to replacement the technical scheme that aforementioned each embodiment puts down in writing.All any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. the readiness control circuit of a micro-wave oven, the output and the resistance R between ground 1 that comprise the first rectification filtering unit that is connected with alternating current, the switch transformer that is connected with described the first rectification filtering unit, the second input that is connected to described switch transformer and the power supply IC between ground, the Rectified alternating current of described switch transformer output is processed and driven the second rectification filtering unit of single-chip microprocessor MCU and is connected to described the second rectification filtering unit, it is characterized in that, described readiness control circuit also comprises:
The resistance R 2 that the first input end of first end and described power supply IC joins; And
The arousal function K switch 1 of be connected between second end and ground of described resistance R 2, carrying out folding according to user's touch-control.
2. readiness control circuit as claimed in claim 1, is characterized in that, described readiness control circuit also comprises:
First end is connected with the second input of described power supply IC, the resistance R 3 of the second described single-chip microprocessor MCU output of termination; And
The idle function K switch 2 of be connected between second end and ground of described resistance R 3, carrying out folding according to user's touch-control.
3. readiness control circuit as claimed in claim 2, is characterized in that, is connected with an isolated component between described resistance R 3 and described single-chip microprocessor MCU.
4. readiness control circuit as claimed in claim 3, is characterized in that, described isolated component is optocoupler;
The output of the described single-chip microprocessor MCU of input termination of described optocoupler, the second end of the described resistance R 3 of output termination of described optocoupler, the earth terminal ground connection of described optocoupler.
5. as the described readiness control circuit of claim 1-4 any one, it is characterized in that, described the first rectification filtering unit comprises rectifier bridge BR1 and electrochemical capacitor E1;
Two inputs of described rectifier bridge BR1 connect respectively alternating current, the earth terminal ground connection of described rectifier bridge BR1, the first input end of the described switch transformer of output termination of described rectifier bridge BR1, described electrochemical capacitor E1 is connected between the output and ground of described rectifier bridge BR1.
6. as the described readiness control circuit of claim 1-4 any one, it is characterized in that, described the second rectification filtering unit comprises diode D1 and electrochemical capacitor E2;
The anode of described diode D1 connects the output of described switch transformer, and the negative electrode of described diode D1 is the output of described the second rectification filtering unit, and described electrochemical capacitor E2 is connected between the negative electrode and ground of described diode D1.
7. micro-wave oven, comprise control panel, it is characterized in that, described micro-wave oven also comprises as the described readiness control circuit of claim 1-6 any one, and have on described control panel the arousal function button corresponding with described arousal function K switch 1 or respectively with arousal function button corresponding to described arousal function K switch 1 and the idle function button corresponding with idle function K switch 2.
8. micro-wave oven as claimed in claim 7, is characterized in that, the function button on described control panel is the electronic switch that comprises touch-switch.
9. micro-wave oven as claimed in claim 7, is characterized in that, the function button on described control panel is change-over switch.
10. micro-wave oven as claimed in claim 7, is characterized in that, the function button on described control panel is microswitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220493692 CN202973221U (en) | 2012-09-25 | 2012-09-25 | Microwave oven and standby control circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220493692 CN202973221U (en) | 2012-09-25 | 2012-09-25 | Microwave oven and standby control circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202973221U true CN202973221U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220493692 Expired - Fee Related CN202973221U (en) | 2012-09-25 | 2012-09-25 | Microwave oven and standby control circuit thereof |
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| Country | Link |
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| CN (1) | CN202973221U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108151769A (en) * | 2017-11-30 | 2018-06-12 | 广东美的厨房电器制造有限公司 | Door of microwave oven detection device and method |
| CN109884942A (en) * | 2019-03-01 | 2019-06-14 | 广东美的厨房电器制造有限公司 | The control system and electric appliance of electric appliance |
-
2012
- 2012-09-25 CN CN 201220493692 patent/CN202973221U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108151769A (en) * | 2017-11-30 | 2018-06-12 | 广东美的厨房电器制造有限公司 | Door of microwave oven detection device and method |
| CN109884942A (en) * | 2019-03-01 | 2019-06-14 | 广东美的厨房电器制造有限公司 | The control system and electric appliance of electric appliance |
| CN109884942B (en) * | 2019-03-01 | 2021-12-17 | 广东美的厨房电器制造有限公司 | Control system of electric appliance and electric appliance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20180925 |