CN101452264A - Power control device for zero power consumption standby and safety operation - Google Patents
Power control device for zero power consumption standby and safety operation Download PDFInfo
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Abstract
The invention belongs to the field of household appliance, and particularly relates to a power supply control device with zero power consumption standby and safe run. The power supply control device is characterized in that as the power supply control device adopts comprehensive technological guarantee measures including a signal induction circuit, an AC power supply supervisory circuit, an AC power supply switch, a controller, an auxiliary power supply, and the like, the power supply control device can not only realize the zero power consumption standby through a simpler control scheme, but also timely cut off the AC power supply of a controlled device once an AC power supply abnormity is detected during the run of the controlled device; therefore, the power supply control device can ensure the safe run of the controlled device.
Description
Technical Field
The invention belongs to the field of household appliances, and particularly relates to a power supply control device for zero-power standby and safe operation of a household appliance.
Background
The standby of the household appliances has the problems of standby energy consumption and standby safety. Due to the complexity of household appliances and power supply systems thereof, it is extremely difficult to adopt an alternating current power supply for standby so as to fundamentally reduce standby energy consumption, and the standby safety problem cannot be solved by adopting the alternating current power supply for standby, while the adoption of a non-alternating current power supply for standby is a necessary way to solve both standby energy consumption and standby safety.
The use of rechargeable power supplies is a typical class of non-ac power standby solutions, and the main limitations of such solutions include the following:
1. is the one-time investment cost acceptable to home appliance manufacturers?
2. Whether the energy storage device has an electrical life matched with the controlled electrical appliance. Otherwise, the energy storage element is replaced in the service life of the electronic product, and the cost, inconvenience and other factors caused by the replacement are unacceptable for consumers;
3. is the intermittent period of use of the electronic device less than the allowed discharge period of the energy storage device? Otherwise, the energy storage element can not provide enough electric energy for next startup, and the problem exists when the computer is started again;
4. how does the system start after the energy storage element runs out of energy due to a long time for first power-on or disconnection from the ac power source?
5. Can enough starting impact energy be provided? One of the main reasons that consumers are really willing to accept zero power consumption standby is standby safety, and an important sign for meeting the psychological safety of consumers is that a mechanical relay is used for thoroughly cutting off an alternating current power supply, and the starting of the mechanical relay needs larger impact electric energy;
6. other problems, such as activation of the initial use of the rechargeable battery.
These difficult to deal with problems have led to non-ac standby schemes that have been difficult to adopt in mainstream appliances. In recent years, a super capacitor having excellent electric performance, high cost performance, and long life has attracted attention as an energy storage element, and one attempt is to use the super capacitor as a standby power supply. But the major drawbacks of supercapacitors are:
1. the leakage of the battery is serious, and the maintenance time after one-time charging is very short;
2. in order to ensure the minimum operating voltage of the system, the stored energy is usually only partially utilized. If the booster circuit is added, additional cost and energy consumption are increased.
In the invention patent "a method for realizing zero power consumption standby of household appliances powered by super capacitor", a method for using super capacitor as standby power supply in remote control household appliances is proposed in patent No. 200410053286.6. The biggest characteristic of the patent is that a button switch is connected in parallel with a contact of an alternating current power switch. The problem that the system cannot be started after the energy of the energy storage element is exhausted due to the fact that the household appliance is started for the first time or is separated from the alternating-current power supply for a long time is solved.
But there are several problems:
1. the large energy consumption of the standby control device will aggravate the energy storage consumption of the super capacitor, and the support time after each charging is greatly reduced.
2. The installation mode of the equipment is limited, for example, the high-level installation mode of a wall-mounted air conditioner is difficult to accept manual starting operation, the working modes of frequent business trip, going out and the like of infrequently used equipment such as video disks, audios and the like can frequently cause emptying of a super capacitor, the frequency of starting an electric appliance through a button can be greatly improved, and the application of the technology is limited by the factors.
The invention relates to a zero-power consumption standby power supply control device, which has the following patent numbers: 2004100622862 provides a complete solution for standby with a disposable, small capacity, long life battery by an extremely low power design. However, the complexity of software and hardware of the device is obviously improved by alternating current and direct current power supply monitoring, complete shutdown of a working power supply of the single chip microcomputer, a controlled power supply switching mode based on triggering and maintaining and the like. The most critical problem is that the structure can provide standby safety of the controlled device, but cannot ensure the operation safety of the controlled device when power supply abnormality occurs in the operation process.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a more effective solution, and can provide operation safety guarantee under the condition of realizing the aim of zero power consumption standby.
In order to solve the above problems, the present invention provides a power control device with zero power consumption for standby and safe operation, which is characterized in that: the device comprises a controller, an alternating current power switch, an alternating current power monitoring circuit, a signal induction circuit and a standby power supply; wherein,
the standby power supply provides standby and working power supply for the control device;
the signal sensing circuit is a micro-power consumption signal sensing circuit, and an output signal of the signal sensing circuit is used for activating the controller and providing a control code for the controller;
if the starting-up code is received, the controller is connected with an alternating current power supply of the controlled equipment through the alternating current power supply switch, so that the controlled equipment enters a working state; if the controller is activated by the interference signal, the controller automatically restores to a low-power-consumption sleep state after the signal disappears; if the running controller receives the shutdown code, the AC power supply of the controlled equipment is cut off through the AC power supply switch, and meanwhile, the controller also enters a low-power-consumption sleep state;
the alternating current power supply monitoring circuit is connected with the control mechanism of the alternating current power supply switch in series and then bridged on the alternating current power supply to detect the alternating current power supply change condition in the starting process of the alternating current power supply switch and monitor the abnormal conditions of power failure, overvoltage and the like of the alternating current power supply in the operation process of the controlled equipment, and the controller cuts off the alternating current power supply of the controlled equipment when detecting that the alternating current power supply is abnormal.
Further, a signal induction circuit in a power control device for zero power consumption standby and safe operation, characterized in that: the circuit comprises a first signal sensing circuit and a second signal sensing circuit; wherein,
the first signal sensing circuit is a micro-power consumption signal sensing circuit and is always in a working state, and an output signal of the first signal sensing circuit is used for activating the controller;
the second signal sensing circuit is a power-controlled signal sensing circuit, the output of the second signal sensing circuit is connected with the controller, the power supply of the second signal sensing circuit is turned off in the standby process of the device, and the working power supply of the second signal sensing circuit is turned on only after the controller is activated.
Furthermore, the power supply control device with zero power consumption standby and safe operation is characterized in that the signal sensing circuit is an infrared signal receiving circuit.
Further, a standby power supply in a power control device for zero power consumption standby and safe operation, characterized in that: comprises a button switch, a rechargeable power supply and a voltage monitoring circuit; wherein,
when the rechargeable power supply is insufficient, the button switch is pressed to switch on an alternating current power supply channel of the rechargeable power supply so as to supplement electric energy to the rechargeable power supply;
in the standby process of the controlled equipment, when the voltage monitoring circuit detects that the electric energy of the rechargeable power supply is insufficient, the controller is connected with the alternating current power supply of the controlled equipment through the alternating current power supply switch to start charging the energy storage element of the rechargeable power supply, the alternating current power supply of the controlled equipment is automatically turned off after the charging is finished, and the controller restores the standby state.
Further, the standby power supply in the zero-power-consumption standby and safe-operation power supply control device comprises a power supply switching circuit and a battery; wherein,
two input ends of the power switching circuit are respectively connected with a controlled equipment working power supply and the battery, so that automatic switching and isolation between the controlled equipment working power supply and the battery are realized; after the alternating current power supply of the controlled equipment is closed, the power supply channel is automatically switched to a battery power supply channel, and the power supply channel of the working power supply of the controlled equipment is automatically closed; after the alternating current power supply of the controlled equipment is switched on, the power supply switching circuit is automatically switched to the working power supply channel of the controlled equipment, and the battery power supply channel is automatically closed.
Further, the standby power supply required by the power supply control device for zero power consumption standby and safe operation further comprises a switch, wherein the switch is connected between the battery and the power supply switching circuit in series and used for switching off the battery power supply channel when the controlled equipment is stored for a long time or switching on the battery power supply channel after the controlled equipment is installed in a working place.
Further, a power supply changeover switch in the standby power supply required in a zero power consumption standby and safe operation power supply control device includes: a first switch, a second switch, a third switch; wherein,
the output ends of the first switch, the second switch and the third switch are connected together to be used as power supply ends of the control device;
the first switch is an automatic switch which is connected with the second switch in parallel, and when the second switch and the third switch are closed, the first switch is automatically opened and provides working power supply for the control device;
the second switch is a controlled switch, is controlled by the said controller, the standby is closed;
the input end of the third switch is connected with the working power supply of the controlled equipment, the control end is grounded, and when the working power supply of the controlled equipment disappears, the switch is naturally closed due to reverse bias; when the working power supply of the controlled device exists, the control end of the switch is forward biased, and the output voltage of the control end of the switch is designed and arranged to be higher than the input voltage of the first switch and the second switch, so that the output ends of the first switch and the second switch are forced to be reversely biased to be automatically closed.
Further, an alternating current power switch in the power control device with zero power consumption standby and safe operation is a mechanical switch combination of a relay structure, and comprises a driver, an intermediate relay and a power relay; wherein,
the output of the driver is connected with a coil of the intermediate relay, a normally open contact of the intermediate relay is connected with a sensor of the alternating current power supply monitoring circuit and a coil of the power relay in series and then bridged on an alternating current power supply line, a normally open contact of the power relay is connected in series in an alternating current power supply line of the controlled equipment, and the controller can minimize starting energy consumption of the alternating current power supply switch through accurate control of the driver.
Further, an alternating current power supply switch in the power supply control device with zero power consumption standby and safe operation comprises a photoelectric isolator and a power relay; wherein,
the output end of the photoelectric isolator is connected with a sensor of the alternating current power supply monitoring circuit and a coil of the power relay in series and then bridged on an alternating current power supply line, a normally open contact of the power relay is connected in series in an alternating current power supply line of the controlled equipment, and the controller controls the alternating current power supply switch by driving the primary side of the photoelectric isolator.
Further, the power control device for zero power consumption standby and safe operation further comprises a controlled device state monitoring circuit, wherein the output of the controlled device state monitoring circuit is connected to the controller, and the input signal of the controlled device state monitoring circuit can be the working power supply of the controlled device or any control signal capable of reflecting the working state of the controlled device.
Drawings
FIG. 1 is a block diagram of a power control device for zero power standby and safe operation according to the present invention;
fig. 2 is a block diagram of a power control apparatus 1 for zero power consumption standby and safe operation according to an embodiment of the present invention;
fig. 3 is a block diagram of a power control device 2 for zero power consumption standby and safe operation according to an embodiment of the present invention;
fig. 4 is a block diagram of a power control apparatus 3 for zero power consumption standby and safe operation according to an embodiment of the present invention;
fig. 5 is a block diagram of the structure of an ac power switch of the power control device for zero power consumption standby and safe operation according to embodiment 1 of the present invention;
fig. 6 is a block diagram of the structure of an ac power switch of an apparatus for controlling a power supply with zero power consumption in standby and safe operation according to an embodiment 2 of the present invention;
FIG. 7 is a block diagram of an embodiment of a power switching circuit of a power control device with zero power consumption for standby and safe operation according to the present invention;
fig. 8 is a block diagram of an embodiment of an ac power monitoring circuit of a power control apparatus for zero power consumption standby and safe operation according to the present invention.
Detailed Description
As shown in fig. 1, the present invention provides a power control device with zero power consumption for standby and safe operation, which is characterized in that: the device comprises a controller 1, an alternating current power switch 2, an alternating current power monitoring circuit 3, a signal induction circuit 4 and a standby power supply 5; wherein,
the standby power supply 5 provides standby and working power supply for the control device;
the signal sensing circuit 4 is a micro-power consumption signal sensing circuit, and an output signal of the signal sensing circuit is used for activating the controller 1 and providing a control code for the controller 1;
if a starting code is received, the controller 1 is connected with an alternating current power supply of the controlled equipment through the alternating current power supply switch 2, so that the controlled equipment starts to enter a working state, and if an interference signal is received, the controller 1 automatically restores to a low-power-consumption sleep state after the signal disappears; if the controller 1 which is running receives the shutdown code, the AC power supply of the controlled equipment is cut off through the AC power supply switch 2, and meanwhile, the controller 1 enters a low-power-consumption sleep state;
the alternating current power supply monitoring circuit 3 is connected in series with a control mechanism of the alternating current power supply switch 2 and then bridged on an alternating current power supply, so as to detect the alternating current power supply change condition in the starting process of the alternating current power supply switch 2, monitor abnormal conditions such as power failure, overvoltage and the like of the alternating current power supply in the operation process of the controlled equipment, and cut off the alternating current power supply of the controlled equipment when the controller 1 detects that the alternating current power supply is abnormal.
Further, a signal induction circuit 4 in the power control device for zero power consumption standby and safe operation is characterized in that: comprises a first signal sensing circuit 41 and a second signal sensing circuit 42; wherein,
the first signal sensing circuit 41 is a micro power consumption signal sensing circuit, and is always in a working state, and outputs a signal for activating the controller 1;
the second signal sensing circuit 42 is a power controlled signal sensing circuit, the output of which is connected to the controller 1 and the controlled device, the power of which is turned off during the standby of the apparatus, and the operating power of the second signal sensing circuit 42 is turned on only after the controller 1 is activated.
Further, the power supply control device with zero power consumption standby and safe operation is characterized in that the signal sensing circuit 4 is an infrared signal receiving circuit.
As shown in fig. 3 and 4, the standby power supply 5 in the power supply control device for zero power consumption standby and safe operation is characterized in that: comprises a button switch 51-3, a rechargeable power supply 51-1 and a voltage monitoring circuit 51-2; wherein,
when the rechargeable power supply 51-1 is not enough to provide working power for the control device, the button switch 51-3 is pressed to switch on an alternating current power supply channel of the rechargeable power supply 51-1, so as to supplement electric energy for the rechargeable power supply 51-1;
in the standby process of the controlled equipment, the voltage monitoring circuit 51-2 constantly monitors the electric energy change of the rechargeable power supply 51-1, when the energy value of the rechargeable power supply is reduced to a certain value, the controller 1 automatically switches on the alternating current power supply of the controlled equipment to complete the charging of the energy storage element of the rechargeable power supply, the alternating current power supply of the controlled equipment is automatically turned off after the charging is completed, and the controller 1 restores the standby state.
In FIG. 3, the input voltage of the rechargeable power supply 51-1 is directly from the 12V operating voltage of the controlled device, while in FIG. 4, the input voltage of the rechargeable power supply 51-1 is from an AC buck and rectifier circuit 51-4.
As shown in fig. 1, the standby power supply 5 in the power control device for zero power consumption standby and safe operation includes a power switching circuit 50-1, a battery 50-2; wherein,
two input ends of the power supply switching circuit 50-1 are respectively connected with a +5V working power supply of the controlled device and the battery 50-2, so that automatic switching and isolation between the +5V working power supply of the controlled device and the battery 50-2 are realized; after the alternating current power supply of the controlled equipment is closed, the +5V working power supply of the controlled equipment disappears, the power supply switching circuit 50-1 automatically switches to the power supply channel of the battery 50-2, and the power supply channel of the working power supply of the controlled equipment is automatically closed; after the controlled device alternating current power supply is switched on, because the +5V working power supply voltage of the controlled device is higher than the output voltage of the battery 50-2, the power supply channel of the battery 50-2 is automatically closed, and the power supply switching circuit 50-1 is automatically switched to the +5V working power supply channel of the controlled device;
as shown in fig. 1 and 2, the standby power supply 5 of the power control device for zero power consumption standby and safe operation further includes a switch 50-3, and the switch 50-3 is connected in series between the battery 50-2 and the power switching circuit 50-1 to switch off the power supply channel of the battery 50-2 when the controlled device is stored for a long time or after the controlled device is installed in a work place.
Fig. 2 shows a power supply structure of a charging power supply 50-4 and a battery 50-2, wherein even after the ac of the controlled device is turned off, the charging power supply 50-4 can still be used as a standby power supply, and the power supply switch 50-1 does not automatically switch to the power supply channel of the battery 50-2 until the output voltage of the charging power supply decreases to a level lower than the output voltage of the battery 50-2, so that the energy consumption of the battery 50-2 can be significantly reduced, the service life of the battery can be prolonged, or a smaller battery can be selected.
Further, the power control device for zero power consumption standby and safe operation further comprises a controlled device state monitoring circuit 6, wherein the output of the controlled device state monitoring circuit 6 is connected to the controller 1, and the input signal of the controlled device state monitoring circuit 6 can be the working power supply of the controlled device or any control signal capable of reflecting the working state of the controlled device.
The following describes in detail a control process of a zero power consumption standby and safe operation power control apparatus with reference to the accompanying drawings:
as shown in fig. 5, the ac power switch 2 in the zero power consumption standby and safe operation power control device is a mechanical switch combination of a relay structure, and includes a driver 201, an intermediate relay (coil 202, contact 203), and a power relay (coil 204, contact 205);
this is a typical relay control structure composed of an intermediate relay and a power relay, wherein one end of a coil 202 of the intermediate relay is connected with the controller 1 through a driver 201, and the other end of the coil 202 of the intermediate relay is connected with a working power supply VDD of a control device. The normally open contact 203 of the intermediate relay is connected with the coil 204 of the power relay and the alternating current power supply monitoring circuit 3 in series and then is bridged on an alternating current power supply, and the normally open contact 205 of the power relay is connected in series in an alternating current power supply circuit of the controlled equipment; when the controller 1 enables the coil 202 of the intermediate relay to be electrified through the driver 201, the normally open contact 203 of the intermediate relay is closed, the coil 204 of the power relay is electrified, and the normally open contact 205 of the power relay is closed to connect the alternating current power supply of the controlled equipment.
Since the pull-in and hold energy consumption of the intermediate relay is far from each other, the controller 1 can precisely control the pull-in and hold processes of the intermediate relay through the two control terminals R _ CON1 and R _ CON2 of the driver 201, thereby reducing the energy consumption generated on the standby power supply 5 during the pull-in process of the intermediate relay to the maximum extent.
As shown in fig. 6, the ac power switch 2 in a zero power consumption standby and safe operation power control apparatus is a combination of a semiconductor switch and a mechanical relay, and includes a photo-isolator 211, a power relay; wherein,
the output end of the photo-isolator 211 is connected in series with the sensor 31 of the ac power monitoring circuit 3 and the coil 204 of the power relay shown in fig. 7, and then bridged over the ac power line, the normally open contact 205 of the power relay is connected in series in the ac power line of the controlled device, and the controller 1 controls the ac power switch 2 by driving the primary side of the photo-isolator 211 through the control end CON.
As shown in fig. 8, an ac power monitoring circuit 3 in a zero power consumption standby and safe operation power control apparatus includes a sensor 31, a rectifying, filtering and amplifying circuit 32, a first comparator 33, a second comparator 34; wherein,
a typical circuit implementation of the sensor 31 is a coil-type current sensor, and the output of the coil-type current sensor is rectified, filtered and amplified by the rectifying, filtering and amplifying circuit 32 to obtain a voltage value reflecting the current in the power relay coil 204;
assuming that the first comparator 33 is used to detect the working current of the power relay coil 204, the output signal is AC _ che 1; in the starting process of the alternating current power switch 2, if an alternating current power exists and a loop of a power relay coil 204 is normal, as long as a normally open contact 203 of an intermediate relay is attracted, an effective signal is output by the AC _ che1, the controller 1 indicates that the intermediate relay is effectively attracted once, and then the relay is controlled to enter a low-power-consumption holding state, so that the energy consumption of the standby power supply 5 in the attracting process is remarkably reduced.
In the normal operation process of the controlled equipment, if the controller 1 monitors that the effective signal of the AC _ che1 disappears, which means that the AC power supply is powered off, the controller 1 immediately cancels the excitation of the intermediate relay coil 202, so that the coil 202 of the intermediate relay is prevented from being excited only by the standby power supply 5 for a long time after the AC power supply is powered off, unnecessary consumption of the electric energy of the standby power supply is prevented, and the automatic restart of the controlled electric appliance after the AC power supply is recovered can be avoided.
Under normal conditions, the second comparator 34 sets a higher threshold, and does not output a valid signal AC _ che 2; however, under an overvoltage condition, the coil 204 of the power relay is subjected to a higher voltage to cause the iron core to be saturated, the current of the relay coil is increased sharply, and then a higher output voltage is generated through the sensor 31 and the rectifying, filtering and amplifying circuit 32, so that the second comparator 34 outputs an AC _ che2 valid signal, and then the controller 1 immediately cancels the excitation of the intermediate relay coil 202, thereby cutting off the alternating current power supply of the controlled device and ensuring the operation safety of the device.
Referring to fig. 1 and an embodiment of a power switching circuit 50-1 in fig. 7, a power switching switch in a standby power supply required in a zero power consumption standby and safe operation power control apparatus includes: a first switch 50-11, a second switch 50-12, a third switch 50-13; wherein,
the output ends of the first switch 50-11, the second switch 50-12 and the third switch 50-13 are connected together to be used as a power supply end VDD of the control device;
the first switch 50-11 is an automatic switch, which is connected in parallel with the second switch 50-12, and the input end of the automatic switch is connected with an auxiliary power supply VDD1, and when the second switch 50-12 and the third switch 50-13 are closed, the automatic switch is automatically opened and provides working power supply VDD for the control device;
the second switch 50-12 is a controlled switch, controlled by the controller 1, and is turned off in standby;
the input end of the third switch 50-13 is connected with the controlled device working power supply VDD2, the control end is grounded, and when the controlled device working power supply disappears, the switch is reversely biased, so the switch is automatically closed; when the working power supply of the controlled device exists, the control end of the switch is forward biased, and the output voltage of the control end of the switch is designed to be higher than the input voltage of the first switch 50-11 and the second switch 50-12, so that the output ends of the first switch 50-11 and the second switch 50-12 are forced to be reversely biased to be automatically closed.
The control steps of the power control device for zero power consumption standby and safe operation of the invention are described in detail below with reference to fig. 1:
after the ac power supply of the controlled device is turned off, the controller 1 cancels the excitation of the ac power switch 2, and meanwhile, since the +5v working power supply of the controlled device disappears, the power switching circuit 50-1 of the standby power supply 5 automatically switches to the state where the battery 50-2 provides the working and standby power supplies for the control device, the controller 1 is in a micro-power standby state, and the working power supply of the second infrared signal receiving circuit 42 is turned off by the controller 1, so that the energy consumption is zero; only the controller 1 and the first infrared signal receiving circuit 41 in the sleep state will generate static standby power consumption; if the controller 1 is a single chip with low standby energy consumption, the standby current of the controller 1 can be reduced to below 0.1 microampere, and the static standby current of the first infrared signal receiving circuit 41 can also reach the weak microampere and sub-microampere levels, so that the static standby current of the whole control device is only a tiny value. The first infrared signal receiving circuit 41 then monitors this environment for changes in infrared signals during this process.
After the first infrared signal receiving circuit 41 monitors that the infrared signal in the environment changes, a pulse signal is output to activate the controller 1, meanwhile, the controller 1 switches on the working power supply of the second infrared signal receiving circuit 42, if the controller 1 does not receive a power-on code from the second infrared signal receiving circuit 42, the controller 1 is understood to be an infrared interference signal, and after the interference disappears, the controller 1 is in a micro-power consumption standby state again, and the second infrared signal receiving circuit 42 is closed;
if the controller 1 receives a correct start-up code from the second infrared signal receiving circuit 42, the ac power supply of the controlled device is immediately switched on through the ac power supply switch 2, and as the controlled device is started, a +5V working power supply of the controlled device is established, the power supply switch 50-1 of the standby power supply 5 automatically switches on the +5V working power supply channel of the controlled device, and closes the power supply channel of the battery 50-2, and the whole device is powered by the +5V working power supply of the controlled device;
in the normal operation process of the controlled device, if the controller 1 monitors a shutdown code, the excitation of the alternating current power switch 2 is immediately cancelled, and meanwhile, the working power supply of the second infrared signal receiving circuit 42 is turned off; with the disappearance of the +5V working power supply of the controlled equipment, the power supply switch 50-1 of the standby power supply 5 automatically switches on the power supply channel of the battery 50-2, and the +5V working power supply channel of the controlled equipment is closed, so that the whole device is in a standby state under the power supply of the battery 50-2.
The beneficial advantages of this scheme are:
1. zero power consumption standby is realized, an alternating current power supply can be cut off when in standby, and the intrinsic standby safety characteristic is provided;
2. in the operation process of the controlled equipment, if the AC power supply is abnormal, the AC power supply can be cut off in time, the standby safety of the controlled electrical appliance is ensured, the characteristic of zero power consumption standby is integrated, and the standby safety operation safety of the controlled equipment is realized;
3. because the standby energy consumption is extremely small, the static standby current of the whole device is at the level of weak microampere and submicron microampere, and the disposable battery with small capacity and long service life can be used without replacement within the safe service life of the household appliance;
4. the scheme has low cost, does not change the traditional operation mode, is safer to use, realizes intrinsically safe standby, thoroughly eliminates standby energy consumption and realizes the ultimate energy consumption standard of household appliances; meanwhile, the invention reuses the design irrelevant to the equipment, does not change the circuit structure of the controlled equipment, and is extremely easy to realize the simple integration with the original equipment, thereby being beneficial to the large-scale application of the device; meanwhile, the whole device has simple structure and low cost and is easy to be accepted by household appliance manufacturers.
The reliability of the product is improved, the damage rate is reduced, and the expenditure of the maintenance cost of manufacturers and users is reduced; the result of widely adopting the technology can also greatly save energy, thoroughly eliminate the environmental problems caused by the energy, and has extremely remarkable social benefit; the standby energy consumption becomes the focus of household electrical appliance products and the technical barrier in the future, China is a large household electrical appliance manufacturing country, and the technology enables the household electrical appliance industry in China to have unique competitive advantages in the world.
Claims (9)
1. A power supply control device with zero power consumption standby and safe operation is characterized by comprising a signal induction circuit, an alternating current power supply monitoring circuit, an alternating current power supply switch, a controller and an auxiliary power supply; wherein,
the auxiliary power supply provides standby and working power supply for the control device;
the signal sensing circuit is a micro-power consumption signal sensing circuit, and an output signal of the signal sensing circuit is used for activating the controller and providing a control code for the controller;
if the starting-up code is received, the controller is connected with an alternating current power supply of the controlled equipment through the alternating current power supply switch, so that the controlled equipment enters a working state; if the controller is activated by the interference signal, the controller automatically restores to a low-power-consumption sleep state after the signal disappears; if the running controller receives the shutdown code, the AC power supply of the controlled equipment is cut off through the AC power supply switch, and meanwhile, the controller also enters a low-power-consumption sleep state;
the alternating current power supply monitoring circuit is connected with the control mechanism of the alternating current power supply switch in series and then bridged on the alternating current power supply to detect the alternating current power supply change condition in the starting process of the alternating current power supply switch and monitor the abnormal conditions of power failure, overvoltage and the like of the alternating current power supply in the operation process of the controlled equipment, and the controller cuts off the alternating current power supply of the controlled equipment when detecting that the alternating current power supply is abnormal.
2. The signal sensing circuit as recited in claim 1, wherein: the circuit comprises a first signal sensing circuit and a second signal sensing circuit; wherein,
the first signal sensing circuit is a micro-power consumption signal sensing circuit and is always in a working state, and an output signal of the first signal sensing circuit is used for activating the controller;
the second signal sensing circuit is a power-controlled signal sensing circuit, the output of the second signal sensing circuit is connected with the controller, the power supply of the second signal sensing circuit is turned off in the standby process of the device, and the working power supply of the second signal sensing circuit is turned on only after the controller is activated.
3. The signal sensing circuit of claim 1, wherein the signal sensing circuit is an infrared signal receiving circuit.
4. An auxiliary power supply as claimed in claim 1, including a push button switch, rechargeable power supply, voltage monitoring circuitry; wherein,
when the rechargeable power supply is insufficient, the button switch is pressed to switch on an alternating current power supply channel of the rechargeable power supply so as to supplement electric energy to the rechargeable power supply;
in the standby process of the controlled equipment, when the voltage monitoring circuit detects that the electric energy of the rechargeable power supply is insufficient, the controller is connected with the alternating current power supply of the controlled equipment through the alternating current power supply switch to start charging the energy storage element of the rechargeable power supply, the alternating current power supply of the controlled equipment is automatically turned off after the charging is finished, and the controller restores the standby state.
5. An auxiliary power supply as claimed in claim 1, comprising a power switching circuit, a battery; wherein,
two input ends of the power switching circuit are respectively connected with a controlled equipment working power supply and the battery, so that automatic switching and isolation between the controlled equipment working power supply and the battery are realized; after the alternating current power supply of the controlled equipment is closed, the power supply channel is automatically switched to a battery power supply channel, and the power supply channel of the working power supply of the controlled equipment is automatically closed; after the alternating current power supply of the controlled equipment is switched on, the power supply switching circuit is automatically switched to the working power supply channel of the controlled equipment, and the battery power supply channel is automatically closed.
6. An auxiliary power supply as claimed in claim 5, further characterized by comprising a switch connected in series between said battery and the power switching circuit for switching off the battery supply path when the controlled device is stored for a long period of time or after the controlled device is installed in the workplace.
7. The power switching circuit of claim 5 further characterized by comprising a first switch, a second switch, a third switch; wherein,
the output ends of the first switch, the second switch and the third switch are connected together to be used as power supply ends of the control device;
the first switch is an automatic switch which is connected with the second switch in parallel, and when the second switch and the third switch are closed, the first switch is automatically opened and provides working power supply for the control device;
the second switch is a controlled switch, is controlled by the said controller, is closed while awaiting the opportune moment;
the input end of the third switch is connected with the working power supply of the controlled equipment, the control end is grounded, and when the working power supply of the controlled equipment disappears, the switch is automatically closed because of reverse bias; when the working power supply of the controlled device exists, the control end of the switch is forward biased, and the output voltage of the control end of the switch is designed and arranged to be higher than the input voltage of the first switch and the second switch, so that the output ends of the first switch and the second switch are forced to be reversely biased to be automatically closed.
8. An alternating current power switch as claimed in claim 1, comprising a photo isolator, a power relay; wherein,
the output side of the photoelectric isolator is connected with a sensor of the alternating current power supply monitoring circuit and a coil of the power relay in series and then bridged on an alternating current power supply line, a normally open contact of the power relay is connected in series in an alternating current power supply line of the controlled equipment, and the controller drives the primary side of the photoelectric isolator to control the alternating current power supply switch.
9. The power control device with zero power consumption standby and safe operation as claimed in claim 1, comprising a controlled device status monitoring circuit, wherein the output of the controlled device status monitoring circuit is connected to the controller, and the input signal of the controlled device status monitoring circuit can be the operating power supply of the controlled device or any control signal capable of reflecting the operating status of the controlled device.
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CNA2007101302244A CN101452264A (en) | 2007-07-16 | 2007-07-16 | Power control device for zero power consumption standby and safety operation |
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CN103235525A (en) * | 2013-04-10 | 2013-08-07 | 深圳市世超电子科技有限公司 | Zero-power-consumption standby system for electrical equipment |
CN104345659A (en) * | 2013-08-06 | 2015-02-11 | 海尔集团公司 | Power control method and circuit for household appliance function module |
CN104730971A (en) * | 2013-12-24 | 2015-06-24 | 黄冠雄 | Micro-power consumption standby system and device |
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