CN204065703U - A kind of circuit-breaking memory circuit and household appliance controlling system - Google Patents
A kind of circuit-breaking memory circuit and household appliance controlling system Download PDFInfo
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- CN204065703U CN204065703U CN201420288060.3U CN201420288060U CN204065703U CN 204065703 U CN204065703 U CN 204065703U CN 201420288060 U CN201420288060 U CN 201420288060U CN 204065703 U CN204065703 U CN 204065703U
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Abstract
The utility model relates to a kind of circuit-breaking memory circuit and household appliance controlling system, comprise control panel, control panel is provided with Master control chip, Master control chip is connected with display module and circuit-breaking memory circuit, circuit-breaking memory circuit comprises real-time timepiece chip, real-time timepiece chip is provided with primary power pin VCC2 and standby power supply pin VCC1, primary power pin VCC2 connects main power circuit, standby power supply pin VCC1 connects standby power supply circuit, standby power supply circuit comprises the first farad capacitor C4, diode D1 and current-limiting resistance R2, the positive pole of diode D1 is connected with external power source, the negative pole of diode D1 is connected with the standby power supply pin VCC1 of real-time timepiece chip, the positive pole serial connection current-limiting resistance R2 of the first farad capacitor C4 is connected with the negative pole of diode D1 again, the negative pole of the first farad capacitor C4 is connected to ground.In the power-off state, can maintain the function of power-fail memory function in 24 hours, the information that user inputs before can not needing the time that resets and user all can be retained the utility model, is user-friendly to product.
Description
Technical field
The utility model relates to a kind of control system with power failure memory function, be applied in circuit-breaking memory circuit in the household electrical appliance for kitchen use such as electric oven, electric steam box, micro-wave oven, coffee machine and household appliance controlling system in particular to a kind of, belong to field of domestic appliances manufacture technology.
Background technology
The kitchen household electrical appliance such as existing electric oven, electric steam box, micro-wave oven, coffee machine generally do not possess power failure memory function, when running into the situations such as unexpected power-off, the user that at every turn powers on needs to reset the information such as clock, otherwise product cannot use, especially just more urgent for these products that need fix time of culinary art classes.
In order to address this problem, the electric capacity in self circuit of some product utilizations, maintains the design proposal of a few minutes power failure memory function, can not solve the misery that the long-time power-off of user brings.The portioned product also had adopts button cell head it off, and user uses just needed to change battery by 1 year half a year, and this type of product user cannot self-changeable battery, and workload is large, and costly, user is unworthy that pay time and money changes for this reason, unsustainable.
Utility model content
The utility model fundamental purpose is to solve the problem and not enough, provides one can keep power failure memory function for a long time, and without the need to the circuit-breaking memory circuit that resets information parameter after a loss of power and household appliance controlling system.
For achieving the above object, the technical solution of the utility model is:
A kind of circuit-breaking memory circuit, comprise real-time timepiece chip, described real-time timepiece chip is provided with primary power pin VCC2 and standby power supply pin VCC1, described primary power pin VCC2 connects main power circuit, described standby power supply pin VCC1 connects standby power supply circuit, described standby power supply circuit comprises the first farad capacitor C4, diode D1 and current-limiting resistance R2, the positive pole of described diode D1 is connected with external power source, the negative pole of described diode D1 is connected with the standby power supply pin VCC1 of real-time timepiece chip, the positive pole of described first farad capacitor C4 is connected in series described current-limiting resistance R2 and is connected with the negative pole of diode D1, the negative pole of described first farad capacitor C4 is connected to ground.
Further, the electric capacity of described first farad capacitor C4 is 0.2-1F.
Further, the electric capacity of described first farad capacitor C4 is 0.2-0.3F.
Further, the model of described real-time timepiece chip is DS1302.
Further, also comprise clock crystal oscillator circuit, described clock crystal oscillator circuit comprises crystal oscillator CY1, the first electric capacity C6 and the second electric capacity C7, described real-time timepiece chip is provided with pin X1 and X2, described pin X1 with X2 is connected with the both positive and negative polarity of crystal oscillator CY1 respectively, be connected to ground after the positive pole of described crystal oscillator CY1 connects the first electric capacity C6, be connected to ground after the negative pole of described crystal oscillator CY1 connects the second electric capacity C7.
Further, described real-time timepiece chip is also provided with serial communication clock input pin SCLK, serial communication data I/O pin I/O, reset pin RST, is connected after these three pins are connected in series a resistance respectively with external power source.
Further, described primary power pin VCC2 and standby power supply pin VCC1 inputs the 5V direct supply provided by control panel power supply.
Another technical scheme of the present utility model is:
A kind of household appliance controlling system, comprise control panel, described control panel is provided with Master control chip, described Master control chip is connected with display module and circuit-breaking memory circuit described above.
To sum up content, a kind of circuit-breaking memory circuit described in the utility model and household appliance controlling system, by adopting farad capacitor and the circuit design with vast capacity, in the power-off state, increase the maintainable current capacity of memory circuit chip, reach the function that can maintain power-fail memory function in 24 hours, in 24 hours in power-off time, the information that user inputs before can not needing the time that resets and user all can be retained, and is user-friendly to product.
Accompanying drawing explanation
Fig. 1 is the utility model Control system architecture schematic diagram;
Fig. 2 is the utility model circuit-breaking memory circuit figure.
As depicted in figs. 1 and 2, Master control chip 1, display module 2, circuit-breaking memory circuit 3, real-time timepiece chip 4, main power circuit 5, standby power supply circuit 6, control panel 7.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:
As shown in Figure 1, the utility model provides a kind of household appliance controlling system, is applied on the kitchen household electrical appliance such as electric oven, electric steam box, micro-wave oven, coffee machine.
Control system comprises control panel 7, control panel 7 is provided with Master control chip 1, Master control chip 1 is connected with display module 2 and circuit-breaking memory circuit 3, Master control chip 1 provides+5V direct supply by control panel 7, display module 2 is for passing through word or pattern displaying clock information, work state information etc., Master control chip 1 is also connected with signal input unit, temperature detecting unit, voice output unit, control output unit, gate control module etc., Master control chip 1 is for receiving and processing each input information, and input information is shown in display module 2, export control signal through controlling output unit simultaneously, in order to control electric oven, electricity steam box, micro-wave oven, the kitchen household electrical appliance such as coffee machine normally work.
The utility model additionally provides a kind of circuit-breaking memory circuit 3, circuit-breaking memory circuit 3 can be remembered information such as the mode of operation of the household electrical appliance such as electric oven, corresponding desired temperature and time setting values, if run into the situation of power-off, when clock is still normally walked, after re-powering, user directly can use this product, does not need to reset clock information, and the information such as function, time of setting before can remembering, provide convenience for user operation the machine and support.
Consider that Chinese family user is in use electric oven, electric steam box, micro-wave oven, coffee machine process, there is the situation of interim power-off in great majority, generally rarely exceed 24 hours, therefore, the circuit-breaking memory circuit 3 that the utility model provides can ensure real-time timepiece chip 4 continuous firing more than 24 hours under powering-off state.
As depicted in figs. 1 and 2, circuit-breaking memory circuit 3 comprises real-time timepiece chip 4, real-time timepiece chip 4 is provided with eight pins, wherein, comprise primary power pin VCC2, standby power supply pin VCC1, pin X1 and X2, serial communication clock input pin SCLK, serial communication data I/O pin I/O, the direct ground connection of reset pin RST and pin GND, pin GND.
Wherein, real-time timepiece chip 4 is for storing the operation information in Master control chip 1, as the working time, temperature, mode of operation etc. of setting, Master control chip 1 reads the data in real-time timepiece chip 4, shown by display module 2, Master control chip 1 also can carry out optimum configurations to real-time timepiece chip 4 simultaneously, and then realizes time modification etc.
Primary power pin VCC2 connects main power circuit, main power circuit provides+5V direct supply by control panel power supply, primary power pin VCC2 connects+5V direct supply, be connected to ground by the 3rd electric capacity C2 again, 3rd electric capacity C2 is the decoupling capacitor of primary power pin VCC2, to improve antijamming capability.When normal power supply, be that real-time timepiece chip 4 is powered+5V direct current by main power circuit.
Standby power supply pin VCC1 connects standby power supply circuit, standby power supply circuit comprises the first farad capacitor C4, diode D1, current-limiting resistance R2 and the 4th electric capacity C1, + 5V the direct supply that positive pole and the control panel power supply of diode D1 provide is connected, the positive pole of diode D1 is connected to ground by the 4th electric capacity C1,4th electric capacity C1 is the decoupling capacitor of standby power supply pin VCC1, to improve antijamming capability.The negative pole of diode D1 is connected with the standby power supply pin VCC1 of real-time timepiece chip 4, the positive pole serial connection current-limiting resistance R2 of the first farad capacitor C4 is connected with the negative pole of diode D1 again, the negative pole of the first farad capacitor C4 is connected to ground, and diode D1 recharges in order to prevent the electric current when the first farad capacitor C4 discharges.
Eliminate a diode between the standby power supply pin VCC1 of the first farad capacitor C4 and real-time timepiece chip 4, the voltage drop that diode brings can be avoided, improve farad capacitor capacity usage ratio.If add a diode between the standby power supply pin VCC1 of the first farad capacitor C4 and real-time timepiece chip 4, then the first farad capacitor C4 voltage be down to V1 (backup power source voltage minimum value)+V2 (diode drop) below time, namely real-time timepiece chip 4 cannot normally work, during without this diode, when first farad capacitor C4 voltage is down to below V1, real-time timepiece chip 4 quits work, therefore improve farad capacitor capacity usage ratio, thus extend data hold time.
This circuit-breaking memory circuit 3 adopts the real-time timepiece chip 4 of dual power supply, primary power is separated with standby power supply, make when standby power supply is powered, real-time timepiece chip 4 enters low-power consumption mode, extend the retention time of data, for this reason, in the present embodiment, real-time timepiece chip 4 adopts low-power chip, and its model selects DS1302.
Current-limiting resistance R2 in circuit, when the first farad capacitor C4 does not have electric completely, instantaneous charge current can be prevented excessive and external power source impacted, simultaneously, can discharge current be limited during power down keeps, play the effect extending data hold time further.
In the present embodiment, in order to extend data hold time, select jumbo farad capacitor as standby power supply, therefore, the capacitance selection of the first farad capacitor C4 is 0.2-1F, and preferably the electric capacity of the first farad capacitor C4 is 0.2-0.3F, optimum value 0.22F, make real-time timepiece chip 4 after a power failure, can preserve real-time clock can also continuous firing more than 24 hours.And the duty can remembered during this period before clock, memory power-off, user does not need to spend a lot of time and energy again and arranges the initial information of above product, greatly facilitates user and uses this product.
Pin X1 with X2 is connected clock crystal oscillator circuit, clock crystal oscillator circuit comprises crystal oscillator CY1, the first electric capacity C6 and the second electric capacity C7, pin X1 with X2 is connected with the both positive and negative polarity of crystal oscillator CY1 respectively, be connected to ground after the positive pole of crystal oscillator CY1 connects the first electric capacity C6, be connected to ground after the negative pole of crystal oscillator CY1 connects the second electric capacity C7.Crystal oscillator CY1, the first electric capacity C6 and the second electric capacity C7 component frequency are 32.768KHz oscillatory circuit, for clock chip provides work clock.
Be connected with+5V control panel power supply after road difference series resistor R7, R6, R5 of serial communication clock input pin SCLK, serial communication data I/O pin I/O, reset pin RST, another road of three pins is connected with Master control chip 1 respectively, to realize data transmission between the two.After real-time timepiece chip 4 receives the trigger pip that Master control chip 1 sends, control the reading that real-time timepiece chip 4 realizes the information such as working time, temperature, mode of operation to electric oven, make electric oven after power-off re-powers, without the need to manually arranging related information parameters again, can according to the pattern interrupter duty preset, operation uses convenient.
The following detailed description of this circuit-breaking memory circuit principle of work:
During normal use, primary power is that real-time timepiece chip 4 supplies+5V direct current by pin VCC2, and meanwhile, control panel circuit charges to the first farad capacitor C4 by diode D1.Master control chip 1 is undertaken reading and arranging by universal serial bus CLK_RT, DAT_RT, RST_RT that real-time timepiece chip 4 provides.
After circuit power down, primary power is no longer powered for real-time timepiece chip 4, but externally discharged by the first farad capacitor C4, due to the unilateral conduction of diode D1, the electric current of the first farad capacitor C4 all flows real-time timepiece chip 4, and real-time timepiece chip 4 when power down is walked under state power consumption extremely low, therefore the first farad capacitor C4 can for a long time for real-time timepiece chip 4 provides enough electric energy, under this circuit parameter condition, real-time timepiece chip 4 normally work more than 24 hours can be kept.
As mentioned above, plan content given by reference to the accompanying drawings, can derive similar technical scheme.In every case be the content not departing from technical solutions of the utility model, any simple modification done above embodiment according to technical spirit of the present utility model, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (8)
1. a circuit-breaking memory circuit, comprise real-time timepiece chip, it is characterized in that: described real-time timepiece chip is provided with primary power pin VCC2 and standby power supply pin VCC1, described primary power pin VCC2 connects main power circuit, described standby power supply pin VCC1 connects standby power supply circuit, described standby power supply circuit comprises the first farad capacitor C4, diode D1 and current-limiting resistance R2, the positive pole of described diode D1 is connected with external power source, the negative pole of described diode D1 is connected with the standby power supply pin VCC1 of real-time timepiece chip, the positive pole of described first farad capacitor C4 is connected in series described current-limiting resistance R2 and is connected with the negative pole of diode D1, the negative pole of described first farad capacitor C4 is connected to ground.
2. circuit-breaking memory circuit according to claim 1, is characterized in that: the electric capacity of described first farad capacitor C4 is 0.2-1F.
3. circuit-breaking memory circuit according to claim 2, is characterized in that: the electric capacity of described first farad capacitor C4 is 0.2-0.3F.
4. circuit-breaking memory circuit according to claim 1, is characterized in that: the model of described real-time timepiece chip is DS1302.
5. circuit-breaking memory circuit according to claim 1, it is characterized in that: also comprise clock crystal oscillator circuit, described clock crystal oscillator circuit comprises crystal oscillator CY1, the first electric capacity C6 and the second electric capacity C7, described real-time timepiece chip is provided with pin X1 and X2, described pin X1 with X2 is connected with the both positive and negative polarity of crystal oscillator CY1 respectively, be connected to ground after the positive pole of described crystal oscillator CY1 connects the first electric capacity C6, be connected to ground after the negative pole of described crystal oscillator CY1 connects the second electric capacity C7.
6. circuit-breaking memory circuit according to claim 1, it is characterized in that: described real-time timepiece chip is also provided with serial communication clock input pin SCLK, serial communication data I/O pin I/O, reset pin RST, is connected after these three pins are connected in series a resistance respectively with external power source.
7. circuit-breaking memory circuit according to claim 1, is characterized in that: described primary power pin VCC2 and standby power supply pin VCC1 inputs the 5V direct supply provided by control panel power supply.
8. a household appliance controlling system, comprises control panel, described control panel is provided with Master control chip, it is characterized in that: described Master control chip is connected with display module and the circuit-breaking memory circuit described in any one of claim 1-8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420288060.3U CN204065703U (en) | 2014-05-30 | 2014-05-30 | A kind of circuit-breaking memory circuit and household appliance controlling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420288060.3U CN204065703U (en) | 2014-05-30 | 2014-05-30 | A kind of circuit-breaking memory circuit and household appliance controlling system |
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| CN204065703U true CN204065703U (en) | 2014-12-31 |
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| CN201420288060.3U Expired - Lifetime CN204065703U (en) | 2014-05-30 | 2014-05-30 | A kind of circuit-breaking memory circuit and household appliance controlling system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105278354A (en) * | 2014-05-30 | 2016-01-27 | 青岛海尔洗碗机有限公司 | Power-off memory circuit and household electrical appliance control system |
| CN109489258A (en) * | 2018-11-12 | 2019-03-19 | 东莞市科荣环境电器制造有限公司 | It is a kind of can multistage timing, power-fail memory function and A.T.C household heater control system |
-
2014
- 2014-05-30 CN CN201420288060.3U patent/CN204065703U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105278354A (en) * | 2014-05-30 | 2016-01-27 | 青岛海尔洗碗机有限公司 | Power-off memory circuit and household electrical appliance control system |
| CN109489258A (en) * | 2018-11-12 | 2019-03-19 | 东莞市科荣环境电器制造有限公司 | It is a kind of can multistage timing, power-fail memory function and A.T.C household heater control system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210303 Address after: 266000 Haier Industrial Park, 236 qianwangang Road, Qingdao Economic and Technological Development Zone, Qingdao City, Shandong Province Patentee after: QINGDAO HAIER WISDOM KITCHEN APPLIANCE Co.,Ltd. Address before: 266101 Haier Industrial Park, No.1 Haier Road, Laoshan District, Qingdao City, Shandong Province Patentee before: QINGDAO HAIER DISHWASHER Co.,Ltd. |
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| TR01 | Transfer of patent right |