CN201690431U - Oven timer power-off memory circuit - Google Patents
Oven timer power-off memory circuit Download PDFInfo
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- CN201690431U CN201690431U CN2010201922812U CN201020192281U CN201690431U CN 201690431 U CN201690431 U CN 201690431U CN 2010201922812 U CN2010201922812 U CN 2010201922812U CN 201020192281 U CN201020192281 U CN 201020192281U CN 201690431 U CN201690431 U CN 201690431U
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Abstract
The utility model discloses an oven timer power-off memory circuit which relates to the application circuit of the timer of a household appliance, and comprises a resistance-capacitance power circuit; the resistance-capacitance power circuit is connected with a load at the two ends of the load, and is in parallel connected with two voltage-regulator diodes connected in series. Diodes with smaller voltage-regulator values are adopted as the voltage-regulator diodes, and diodes with a model of ZMM2V4 are preferable in particular. Electricity is supplied by the resistance-capacitance power circuit; the leakage current of two smaller diodes which are connected in series is small; and the time of power failure memory is long, which can reach 90 seconds around.
Description
Technical field
The utility model relates to the circuit-breaking memory circuit of the timer of a kind of application circuit, particularly a kind of baking box.
Background technology
Timer is the automatically electrical installation of control of a kind of simple realization, is widely used on the household electrical appliance such as baking box, washing machine, for the automatic operation and the safe operation of these class household electrical appliances provides technical support.In the control circuit of baking box, the timer circuit that can cut off the power supply automatically also is important part, and according to the developing direction of present intelligent household electrical appliances, this class circuit is also being taken into account the power supply assurance function of data accumulating usually.
As existing baking box, have battery saving mode, be under the situation of voltage instability or short time outage, to note ruuning situation in order to prevent, will continue normally to move after waiting voltage stable.After improper outage, chip can be closed demonstration, slew relay work, and chip enters battery saving mode, utilizes the electricity of capacitance stores to keep the work of chip.Outage memory that this baking box uses is used the resistance-capacitance circuit power supply as shown in Figure 1, then and be parallel with a voltage-stabiliser tube between the load.There are some shortcomings in the timer circuit of this form: leakage current is bigger, is not suitable for the outage memory, causes data memory to lose easily once cutting off the power supply.So just can not satisfy above-mentioned needs, cause the performance of whole baking box to reduce.
Summary of the invention
The utility model is intended to invent a kind of circuit of the memory that is more suitable for cutting off the power supply, and reduces leakage current, increases the time of power-failure memory.
The utility model contains the capacitance-resistance power circuit, and the capacitance-resistance power circuit is connected with load, at the load two ends, and two voltage stabilizing didoes that are connected in series in parallel.What described two voltage stabilizing didoes adopted is the diode of less voltage of voltage regulation value.Concrete preferred model is the diode of ZMM2V4.
The power supply of sort circuit capacitance-resistance power circuit, the leakage current of the less diode of two series connection is little, and the time of power-failure memory is long, can reach about 90 seconds.
Description of drawings
Fig. 1, existing baking box timer circuit; Fig. 2, circuit of the present utility model.
Embodiment
As shown in Figure 2, capacitance-resistance power circuit 1 out-put supply, at output two voltage stabilizing circuits that voltage stabilizing didoe D1, D2 are in series in parallel, the model of diode is ZMM2V4, is being connected to load 2, powering load.Load 2 is control chip, display modules of baking box.Use this circuit, when voltage instability or when cutting off the power supply temporarily, power for load 2 by capacitance-resistance power circuit 1 temporarily, load 2 detects the signal of voltage-stabiliser tube, carries out data accumulating automatically and enters standby mode; In case once more electric, voltage-stabiliser tube D1, D2 two ends potential change, load 2 starts once more, works on.
Claims (2)
1. baking box timer circuit-breaking memory circuit contains capacitance-resistance power circuit (1), and capacitance-resistance power circuit (1) is connected with load (2), it is characterized in that: at load (2) two ends, and two voltage stabilizing didoes that are connected in series (D1, D2) in parallel.
2. according to the described baking box timer of claim 1 circuit-breaking memory circuit, it is characterized in that: described voltage stabilizing didoe (D1, D2) is that model is the diode of ZMM2V4.。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201922812U CN201690431U (en) | 2010-05-17 | 2010-05-17 | Oven timer power-off memory circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201922812U CN201690431U (en) | 2010-05-17 | 2010-05-17 | Oven timer power-off memory circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201690431U true CN201690431U (en) | 2010-12-29 |
Family
ID=43378708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201922812U Expired - Fee Related CN201690431U (en) | 2010-05-17 | 2010-05-17 | Oven timer power-off memory circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201690431U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107518778A (en) * | 2017-08-25 | 2017-12-29 | 深圳市阳邦电子股份有限公司 | The application circuit and application process of a kind of electric oven |
-
2010
- 2010-05-17 CN CN2010201922812U patent/CN201690431U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107518778A (en) * | 2017-08-25 | 2017-12-29 | 深圳市阳邦电子股份有限公司 | The application circuit and application process of a kind of electric oven |
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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: 20101229 Termination date: 20190517 |