CN100508096C - Power supply switchover device of domestic electrical equipment - Google Patents
Power supply switchover device of domestic electrical equipment Download PDFInfo
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- CN100508096C CN100508096C CNB2005100718075A CN200510071807A CN100508096C CN 100508096 C CN100508096 C CN 100508096C CN B2005100718075 A CNB2005100718075 A CN B2005100718075A CN 200510071807 A CN200510071807 A CN 200510071807A CN 100508096 C CN100508096 C CN 100508096C
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Abstract
A power supply switch-over device of home appliance is prepared as utilizing switch-over device, controlled device, control device and power supply loop input end to form the first branch; using controlled device and power supply loop input end to form the second branch; controlling controlled device by control device to switch on the second branch and to switching off the first branch by switch-over device when the first branch is switched on by switch-over device then controlling on/off state of controlled device by detecting voltage of switch-over device with control device.
Description
Technical field
The present invention relates to the household electrical appliance of charged control plate, relate in particular to the power transfer device of the household electrical appliance of charged control plate.
Background technology
The household electrical appliance of Cun Zaiing generally have automatically controlled plate in the market, after attaching plug inserts charged socket, and automatically controlled strip electricity, the power transfer device that passes through household electrical appliance is then controlled the operating state of household electrical appliance.Fig. 1 is the circuit diagram of power transfer device that has the household electrical appliance of automatically controlled plate.Live wire L, the zero line N, electric power loop and the power transfer device that comprise attaching plug; The rectifying device that described electric power loop is made up of transformer T1, rectifier diode D1, D2, D3, D4, and stable-pressure device W1 forms; Power transfer device comprises switching device shifter SW1 and single-chip microprocessor MCU.The former limit of transformer T1 is connected with zero line N with the live wire L of attaching plug respectively, secondary will be imported single-chip microprocessor MCU through rectifying device and the voltage behind the stable-pressure device W1 that diode D1, D2, D3 and D4 form, then the operating state of the key-press status control household electrical appliance of single-chip microprocessor MCU scanning switching device shifter SW1.When the needs household electric appliance operation, press switching device shifter SW1, single-chip microprocessor MCU scans the state of switching device shifter SW1 for connecting, and then automatically controlled plate enters operating state.
It in the control device of present household electrical appliance state by single-chip microcomputer scanning switching device shifter SW1, but because single-chip microcomputer is only when charged and in running order, could whether press by the perception switching device shifter, therefore cause household electrical appliance when not working, still to have stand-by power consumption, the a large amount of electric energy that consume cause the serious waste of the energy.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of power transfer device of household electrical appliance is provided, can realizes zero stand-by power consumption when household electrical appliance are not worked.
For solving the problems of the technologies described above, the invention provides a kind of power transfer device of household electrical appliance, described household electrical appliance comprise attaching plug and the electric power loop that is connected with attaching plug, are connected with controlled device between the input of the live wire of attaching plug and electric power loop; Be connected with switching device shifter between the live wire of attaching plug and described controlled device, described switching device shifter is that open type can be automatically reset; And between the input of described controlled device and described electric power loop, be connected with control device;
Described switching device shifter constitutes first branch road by the input of described controlled device and described control device and electric power loop; The input of described controlled device and described electric power loop constitutes second branch road;
When described switching device shifter was communicated with described first branch road, described control device was controlled described controlled device described second branch road is connected, and described switching device shifter cuts off described first branch road; Described then control device is by the break-make of the described controlled device of voltage control of the described switching device shifter of detection.
Wherein, described controlled device is a relay, and the coil of described relay is connected between described switching device shifter and the described control device; The contact of described relay is connected between the input of the live wire of described attaching plug and described electric power loop.
Wherein, described control device comprises: triode, the base stage of described triode is connected with the input of described electric power loop, collector electrode is connected with the coil of described relay, emitter is connected with ground, and the input of the coil of described switching device shifter and described relay, triode and electric power loop constitutes described first branch road.
Wherein, described control device also comprises single-chip microcomputer, the power input of described single-chip microcomputer is connected with the output of described electric power loop, and the signal input part of described single-chip microcomputer is connected with described switching device shifter, and the signal output part of described single-chip microcomputer is connected with the base stage of described triode;
After the described single-chip microcomputer work, when the signal input part of described single-chip microcomputer is low level, the signal output part of described single-chip microcomputer is changed to high level, to keep the conducting state of described triode; When the signal input part of described single-chip microcomputer is high level, the signal output part of described single-chip microcomputer is changed to low level, to disconnect described triode.
In addition, described single-chip microcomputer can also be realized control procedure by following manner: after the described single-chip microcomputer work, when the signal input part of described single-chip microcomputer is high level, the signal output part of described single-chip microcomputer is changed to high level, to keep the conducting state of described triode; When the signal input part of described single-chip microcomputer is low level, the signal output part of described single-chip microcomputer is changed to low level, to disconnect described triode.
Wherein, described control device also comprises: the pull down resistor that is connected with described switching device shifter.
Wherein, the contact of described relay is the open type contact, and described relay is a direct current relay.
In addition, also comprise resistance between the base stage that is connected in described triode and the described electric power loop and the pull down resistor that is connected with the base stage of described triode.
Compared with prior art, the invention has the beneficial effects as follows: the power transfer device of household electrical appliance provided by the invention, when the needs household electric appliance operation, the switching device shifter energized, control device detects the state of switching device shifter thereupon, controlled device is connected, be the late-class circuit power supply, thereby do not need household electrical appliance charged household electrical appliance can startups constantly; When needs are closed household electrical appliance, control device disconnects controlled device according to the state of switching device shifter, automatically reset owing to switching device shifter simultaneously, thereby the path of cut off the electricity supply plug and late-class circuit, therefore make no standby power when household electrical appliance are not worked, thereby realized the zero stand-by power consumption of household electrical appliance.
In addition, can be that described control device input is connected described controlled device when being high level for control device of the present invention to the control mode of described controlled device, when input is low level described controlled device is disconnected; In the time of equally also can adopting input to be low level described control device is communicated with, when input is high level described controlled device is disconnected, thereby make things convenient for the user to select implementation according to actual needs.
Further, the present invention is connected with pull down resistor between the input of switching device shifter and single-chip microcomputer, to guarantee accurately to detect the state variation of switching device shifter when single-chip microcomputer is worked.
In addition, power transfer device of the present invention also has diode, and the electric power loop of single-chip microcomputer is played a protective role.
Description of drawings
Fig. 1 is the circuit theory diagrams of the power transfer device of household electrical appliance in the prior art;
Fig. 2 is the circuit theory diagrams of the power transfer device of household electrical appliance among the present invention;
Fig. 3 is the circuit theory diagrams of power transfer device among first embodiment.
Embodiment
Along with the development of society, the quantity of household electrical appliance grows with each passing day, and at existing household electrical appliance the problem of stand-by power consumption is arranged still when not working, and the present invention proposes a kind of power transfer device, and before not pressing power key, the electric energy of tame electric consumption is zero.Household electrical appliance detect the state of mains switch usually by single-chip microcomputer, the core of power transfer device provided by the invention is, do not need that single-chip microcomputer is constantly charged can to start household electrical appliance, and when household electrical appliance are not worked, can cut off electric power loop, thereby realize the zero idling consumption of household electrical appliance.
Fig. 2 is used for the schematic diagram of household electrical appliance for power control provided by the invention.The electric power loop 2 that comprise attaching plug 1 among the figure, is connected, the load 6 that is connected with electric power loop 2 with attaching plug; Described power transfer device comprises the controlled device 3 between the input that is connected in described attaching plug 1 and described electric power loop 2; The control device 4 that is connected with the input of described controlled device 3 and described electric power loop 2; And the switching device shifter 5 that is connected with described attaching plug 1; Described switching device shifter 5 constitutes first branch road by the input of described controlled device 3 and described control device 4 and electric power loop 2; Described controlled device 3 constitutes second branch road with the input of described electric power loop 2;
The operation principle of power control of the present invention is: described switching device shifter 5 and controlled device 3 are in off-state when household electrical appliance are not worked, and cut off the loop of attaching plug 1 and late-class circuit, thereby make realization zero stand-by power consumption when household electrical appliance are not worked;
When the needs household electric appliance operation, press switching device shifter 5 by hand, this moment switching device shifter 5 with controlled device 3, first branch road and attaching plug 1 that the input of control device 4 and electric power loop 2 is formed are linked to be the loop, supply voltage is through electric power loop 2 transformations, rectification, it after the voltage stabilizing electric of household electrical appliance, after switching device shifter 5 energized, electric power loop is control device 4 power supplies, control device 4 is started working, this timed unit 4 will send control signal, with controlled device 3 closures, make second branch road and the attaching plug 1 same formation loop of the input composition of the electric power loop 2 that is connected with controlled device 3, so supply voltage is an electric by the branch road that is connected with controlled device 3; And switch back reset condition after switching device shifter 5 energized, and control device 4 detects the state of switching device shifter 5 this moment, and the output control signal is to guarantee the closure state of controlled device 3.
When closing household electrical appliance, press switching device shifter 5 once more, this timed unit 4 detects the state of switching device shifter 5, switching controlled device 3 is connected with attaching plug 1, the reset condition owing to automatically switch back after switching device shifter 5 is pressed, therefore switching device shifter 5 switches the attaching plug 1 and the loop of late-class circuit with controlled device 3, and household electrical appliance quit work.Owing to do not constitute the loop, therefore realize zero idling consumption.
In the present invention, described controlled device is selected relay for use, and the coil of described relay is connected in first branch road; The contact of described relay is connected in second branch road.
Described control device comprises: triode, the base stage of described triode is connected with described electric power loop, collector electrode is connected with the coil of described relay, and emitter is connected with ground, and the input of the coil of described switching device shifter and described relay, triode and electric power loop constitutes described first branch road; Described control device also comprises single-chip microcomputer, and the signal input part of described single-chip microcomputer is connected with described switching device shifter, and the signal output part of described single-chip microcomputer is connected with the base stage of described triode; Process for the work of Single-chip Controlling relay has following two kinds of implementations:
First kind is, after the described single-chip microcomputer work, when the signal input part of described single-chip microcomputer is low level, the signal output part of described single-chip microcomputer is changed to high level, to keep the conducting state of described triode; When the signal input part of described single-chip microcomputer is high level, the signal output part of described single-chip microcomputer is changed to low level, to disconnect described triode.
In addition, can also be described single-chip microcomputer work after, when the signal input part of described single-chip microcomputer is high level, the signal output part of described single-chip microcomputer is changed to high level, to keep the conducting state of described triode; When the signal input part of described single-chip microcomputer is low level, the signal output part of described single-chip microcomputer is changed to low level, to disconnect described triode.
The contact of switching device shifter of the present invention is the open type contact, and selects elastic switch for use.
Because the single-chip microcomputer input end can accurately detect the level of input in vacant state in order to guarantee the single-chip microcomputer input when switching device shifter disconnects, the present invention also comprises the pull down resistor that is connected with described switching device shifter.
The contact of described relay is the open type contact, and described relay is a direct current relay.In order to provide DC power supply to direct current relay, the voltage by described switching device shifter need through the rectification of rectifier diode and capacitance every straight effect.
When the needs household electric appliance operation, owing to need switching device shifter to be communicated with electric power loop with triode and coil, therefore need provide conducting voltage for triode, method provided by the invention is to be connected resistance between the base stage of triode and described electric power loop, base stage at described triode connects pull down resistor simultaneously, described pull down resistor plays metering function, prevents from triode is punctured.
Below be example with the washing machine, elaborate implementation procedure of the present invention and operation principle.
First embodiment: in the present embodiment, described switching device shifter is selected elastic switch for use, serves as the power button that starts and close washing machine, and described controlled device is selected direct current relay for use.
Fig. 3 is the schematic diagram of the power transfer device of described washing machine.K1 is a relay, and T1 is a transformer, and L is the power firestreak of plug, and N is the zero-power line of plug, and SW1 is a power button switch, and SW1 one end is connected with the live wire L of plug, and the other end is connected with the coil of relay K 1; Rectifying device and stable-pressure device W1 that transformer T1 and rectifier diode D1, D2, D3, D4 form form electric power loop, are power vd D, relay power VCC and the electric of single-chip microprocessor MCU.Can detect the state of SW1 for the signal input part INI that makes single-chip microprocessor MCU, the spring of elastic switch SW1 is connected with the signal input part INI of single-chip microprocessor MCU, thereby when pressing SW1, the open type contact is communicated with, open type contact automatic disconnection when unclamping SW1.For the input signal of signal input part INI under the different conditions that makes SW1 can accurately detect the state of SW1, between the input of SW1 and single-chip microprocessor MCU, connected resistance R 5 and pull down resistor R4, and the capacitor C 3 that is used for filtering.In addition, between the signal output part of single-chip microprocessor MCU and power end VDD, also be provided with protection diode D8 and resistance R 6.In order to realize control to relay K 1, between the signal output part OUT1 of single-chip microprocessor MCU and relay K 1, triode N1 is set, the base stage of this triode N1 is connected with described signal output part OUT1, emitter is connected with ground, collector electrode is connected with the coil of relay K 1, for for triode provides conducting voltage, between the power supply VCC of relay and triode N1 base stage, also be connected with resistance R 1, and the resistance R 2 that plays the dividing potential drop effect between N1 base stage and the ground.Because present embodiment repeat circuit K1 is direct current relay because need pass through the rectification of rectifier diode D6 by the voltage of SW1, and electric capacity E3 every straight effect.The voltage stabilizing didoe VD1 that is connected with relay power that has also comprised pressure stabilization function in addition.
The operation principle of above-mentioned power control is as described below.
When attaching plug L, the N of washing machine access power supply, before power key SW1 did not press, because the K1 of automatically controlled plate does not have closure, L, N did not constitute the loop, so there is not stand-by power consumption.When the needs washing machine is worked, SW1 presses with power key, the normally opened contact closure of SW1, the L of AC power constitutes the loop by coil, triode N1, the resistance R 3 of SWI, rectifier diode D6, relay K 1 to the zero line N of power supply, drive relay K 1 closure, cause the former limit of power firestreak L, transformer T1 to constitute the loop, obtain lower alternating voltage after the transformer T1 transformation, be electric to zero line N.Simultaneously, stable-pressure device W1 is the power supply of single-chip microprocessor MCU power input, therefore single-chip microprocessor MCU powers on, single-chip microprocessor MCU will be sent the high level electric signal to triode N1 by output OUT1 this moment, the coil of control relay K1 gets after the triode N1 conducting, the contact K1 closure of relay is powered to late-class circuit like this, power button SW1 is owing to select elastic switch for use, therefore automatically reset after pressing, be connected with the live wire L disconnection of attaching plug, because the effect of resistance R 5 and pull down resistor R4, the input IN1 input signal of single-chip microprocessor MCU is a low level, and the output signal of control signal output ends OUT1 keeps high level, triode N1 keeps conducting state, even therefore power button SW1 resets, late-class circuit still can continue electricly, realizes that entire circuit is kept.
When stopping using washing machine, press power button SW1 once more, the normally opened contact closure of power button SW1, make the signal input part IN1 end of single-chip microcomputer to become high level by low level, this moment control single chip computer output OUT1 output low level, triode N1 disconnects, thereby disconnect relay K 1, because at this moment power button SW1 unclamps, ac circuit live wire L, transformer T1, zero line N does not constitute the loop, late-class circuit dead electricity, the control coil dead electricity of power supply relay K1, because what we used is the normally opened contact of relay K 1, has so just realized the purpose of power cutoff.
In addition, another implementation of the present invention can connect negative voltage by the power input with single-chip microcomputer, and this moment, the control procedure for single-chip microcomputer was after single-chip microcomputer powers on, to send high level to triode immediately, with its connection; When the needs household electric appliance operation, because the voltage of single-chip microcomputer is higher than pull down resistor, therefore, and single-chip microcomputer input input high level, Single-chip Controlling signal output part output this moment high level makes triode keep conducting state; When needs were closed household electrical appliance, single-chip microcomputer signal input part level was a low level, at this moment, cut off electric power loop thereby the control signal output ends output low level disconnects triode.Because the course of work is identical with first embodiment, is full of signal input part the control signal of signal output part is changed, so repeat no more.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1, a kind of power transfer device of household electrical appliance, described household electrical appliance comprise attaching plug and the electric power loop that is connected with attaching plug, it is characterized in that:
Between the input of the live wire of attaching plug and electric power loop, be connected with controlled device;
Be connected with switching device shifter between the live wire of attaching plug and described controlled device, described switching device shifter is that open type can be automatically reset; And
Between the input of described controlled device and described electric power loop, be connected with control device;
Described switching device shifter constitutes first branch road by the input of described controlled device and described control device and electric power loop; The input of described controlled device and described electric power loop constitutes second branch road;
When described switching device shifter was communicated with described first branch road, described control device was controlled described controlled device described second branch road is connected, and described switching device shifter cuts off described first branch road; Described then control device is by the break-make of the described controlled device of voltage control of the described switching device shifter of detection.
2, power transfer device according to claim 1 is characterized in that: described controlled device is a relay, and the coil of described relay is connected between described switching device shifter and the described control device; The contact of described relay is connected between the input of the live wire of described attaching plug and described electric power loop.
3, power transfer device according to claim 2, it is characterized in that, described control device comprises: triode, the base stage of described triode is connected with the input of described electric power loop, collector electrode is connected with the coil of described relay, emitter is connected with ground, and the input of the coil of described switching device shifter and described relay, triode and electric power loop constitutes described first branch road.
4, power transfer device according to claim 3, it is characterized in that: described control device comprises single-chip microcomputer, the power input of described single-chip microcomputer is connected with the output of described electric power loop, the signal input part of described single-chip microcomputer is connected with described switching device shifter, and the signal output part of described single-chip microcomputer is connected with the base stage of described triode;
After the described single-chip microcomputer work, when the signal input part of described single-chip microcomputer is low level, the signal output part of described single-chip microcomputer is changed to high level, to keep the conducting state of described triode; When the signal input part of described single-chip microcomputer is high level, the signal output part of described single-chip microcomputer is changed to low level, to disconnect described triode.
5, power transfer device according to claim 3 is characterized in that: described control device comprises single-chip microcomputer, and the signal input part of described single-chip microcomputer is connected with described switching device shifter, and the signal output part of described single-chip microcomputer is connected with the base stage of described triode;
After the described single-chip microcomputer work, when the signal input part of described single-chip microcomputer is high level, the signal output part of single-chip microcomputer is changed to high level, to keep the conducting state of described triode; When described single-chip microcomputer signal input part is low level, described single-chip microcomputer signal output part is changed to low level, to disconnect described triode.
6, according to claim 4 or 5 described power transfer devices, it is characterized in that described control device also comprises: the pull down resistor that is connected with described switching device shifter.
7, according to claim 4 or 5 described power transfer devices, it is characterized in that: the contact of described relay is the open type contact, and described relay is a direct current relay.
8, according to claim 4 or 5 described power transfer devices, it is characterized in that: also comprise resistance between the base stage that is connected in described triode and the described electric power loop and the pull down resistor that is connected with the base stage of described triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100718075A CN100508096C (en) | 2005-05-24 | 2005-05-24 | Power supply switchover device of domestic electrical equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100718075A CN100508096C (en) | 2005-05-24 | 2005-05-24 | Power supply switchover device of domestic electrical equipment |
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| CN1870201A CN1870201A (en) | 2006-11-29 |
| CN100508096C true CN100508096C (en) | 2009-07-01 |
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| CNB2005100718075A Active CN100508096C (en) | 2005-05-24 | 2005-05-24 | Power supply switchover device of domestic electrical equipment |
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| TW201303571A (en) * | 2011-07-12 | 2013-01-16 | 瀚宇彩晶股份有限公司 | Energy saving switch device, and method thereof |
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