Standby power cutoff device

Abstract

A standby power cut-off device installed on a power line connecting an external commercial AC power source and the inside of an electrical device comprises a manual switch that supplies or cuts off the supply of commercial AC power, a solid-state relay that supplies commercial AC power to its output side when current flows to its input side in response to operation of the manual switch, a low-power supply unit that converts the voltage of the commercial AC power supplied from the solid-state relay and supplies it, a microprocessor that receives power from the low-power supply unit and controls the operation of the standby power cut-off device, a power storage unit that receives power from the low-power supply unit and is charged and supplies power to the microprocessor, and a control signal generating unit that sends a control signal to the microprocessor when current flows in response to operation of the manual switch, and when the manual switch is operated, the microprocessor determines that the manual switch has finally stopped operating and performs on or off operation control using a control method, thereby preventing malfunction due to multiple operation control of the microprocessor by multiple control signals.

Description

[Technical field]

[0001] The present invention relates to a standby power cut-off device that can be installed inside or outside of electrical equipment to turn the electrical equipment on and off with a manual switch without the risk of malfunction due to multiple operation of a microprocessor, cut off commercial AC power by turning off the power to the electrical equipment, and at least enable the power stored in the storage unit to be used as network-type standby power required for Internet of Things (IoT) devices. [Background technology]

[0002] Standby power is considered as a challenge in standby mode of electrical appliances, and furthermore, standby power of networked Internet of Things (IoT) devices is considered as a major challenge in networked standby mode of Internet of Things (IoT) devices. Furthermore, in standby mode of electrical appliances, the power factor is substantially low, so there is a worldwide demand for a solution to reduce the energy consumption in networked standby mode of electrical appliances.

[0003] According to the conventional technology disclosed in Patent Document 1, when the power switch is pressed, the phototriac and photocoupler are turned on in the forward direction, AC power is supplied to the power supply unit, the power supply unit supplies power to the control unit (microprocessor), the control unit operates the relay, and power is stably supplied to the power supply unit and the control unit. If power is always supplied to the control unit, the electronic product will operate normally even if the power switch is not pressed. However, while the power switch is pressed, the current repeatedly flows and does not flow through the photocoupler. If the power switch is pressed for one second at a frequency of 60 Hz, the number of times that the operation of passing the current and the operation of stopping the current are repeated is 60, so that multiple control signals are input to the control unit (microprocessor), and there is a possibility that the control unit may malfunction due to the multiple operations. Furthermore, since there is no power storage unit (e.g., a battery or a supercapacitor), it is impossible to adopt the conventional technology in Internet of Things (IoT) devices.

[0004] Furthermore, in this specification, electrical equipment includes all types of equipment in which a standby power cut-off device is adopted, such as Internet of Things (IoT) equipment, wireless remote control electronic equipment controlled by a remote controller, other electronic equipment other than wireless remote control electronic equipment, and various electrical equipment. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Korean Patent No. 10-1494822 Summary of the Invention [Problem to be solved by the invention]

[0006] The object of the present invention is to provide a standby power cut-off device that can be installed inside or outside of an electrical device and can safely turn the power of the electrical device on and off without the risk of malfunction due to unexpected multiple operation even when a manual switch is operated while the commercial AC power is cut off. As a result, when the power of the electrical device is turned off, the commercial AC power is cut off and at least the power required as a network power source for Internet of Things (IoT) devices can be charged in a storage unit such as a super capacitor, allowing the Internet of Things (IoT) devices to communicate. [Means for solving the problem]

[0007] In order to achieve the above object, according to the present invention, there is provided a standby power cut-off device that is installed on a power line that connects an external commercial AC power source with the inside of an electrical device, the standby power cut-off device comprising: a manual switch that supplies or cuts off the supply of commercial AC power; a solid-state relay that supplies commercial AC power to its output side when a current flows to its input side in response to operation of the manual switch; a low-power supply unit that converts the voltage of the commercial AC power supplied from the solid-state relay and supplies the converted voltage; a microprocessor that receives power from the low-power supply unit and controls the operation of the standby power cut-off device; and a power supply that is charged by the power received from the low-power supply unit and supplies a power to the microprocessor. The device includes a power storage unit that supplies power, and a control signal generator that transmits a control signal to a microprocessor when a current flows in response to operation of the manual switch, and the microprocessor performs on or off actuation control using a control method that includes a first step of repeatedly determining whether a control signal from the control signal generator is absent when the manual switch is operated, a step of determining whether a predetermined period of time has elapsed after the first step is executed, and a second step of determining whether a control signal is present, and when it is determined that the control signal is absent, the microprocessor determines that operation of the manual switch has finally stopped. Effect of the Invention

[0008] According to the present invention, by installing a standby power cut-off device inside or outside an electrical device, there is no risk of unexpected multiple operation even if a manual switch is operated while the commercial AC power is cut off, and the electrical device can be turned on and off safely without generating heat or sparks. Therefore, when the electrical device is turned off, the commercial AC power is cut off, thereby preventing the waste of electrical energy due to standby power.

[0009] Furthermore, according to the present invention, the standby power cut-off device is configured to cut off the commercial AC power when the power supply of the electrical equipment is turned off, while charging at least the power required for the network of the Internet of Things (IoT) equipment into a power storage unit such as a supercapacitor, thereby preventing the waste of electrical energy due to not only active power but also reactive power during standby. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a circuit diagram showing a standby power cutoff device according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a circuit diagram showing a current flow in a standby power cutoff device according to a second embodiment of the present invention. [Figure 3A] 3A and 3B are flowcharts showing the first control and the second control according to the half waveform of the commercial AC power, and the operation of the manual switch. [Figure 3B] 3A and 3B are flowcharts showing the first control and the second control according to the half waveform of the commercial AC power, and the operation of the manual switch. [Figure 4] FIG. 4 is a flowchart showing the third control by operating the manual switch. [Figure 5A] 5A and 5B are flow charts illustrating on / off control of electrical appliances such as Internet of Things (IoT) appliances. [Figure 5B] 5A and 5B are flow charts illustrating on / off control of electrical appliances such as Internet of Things (IoT) appliances. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In the description of the embodiment, detailed descriptions of well-known elements and functions will be omitted if it is determined that the description will hinder understanding of the embodiment. Furthermore, the terms described below are defined according to the function of the present invention, but may be changed under the intention or regulation of the user or operator. Therefore, they should be defined based on the entire scope of the present invention.

[0012] 1 shows the standby power cutting device 30 according to the first embodiment of the present invention arranged outside the electric device 1, it is of course possible for the standby power cutting device 30 to be arranged inside the electric device 1 only if the standby power cutting device 30 is arranged on a power line connected to the inside of the electric device 1. More preferably, the standby power cutting device 30 is arranged on a power cable and a power switch that enter a power supply unit of the electric device 1. Furthermore, the standby power cutting device 30 itself may be an electric device such as a power outlet, a power tap, a hub, a relay, a plug, or an adapter.

[0013] In the first embodiment of the present invention, as shown in Fig. 1, one of two power lines 10, 11 is cut off by a main power switch 20, and the other power line 10 is connected without being cut off. However, it will be apparent to those skilled in the art that the two power lines 10, 11 may also be cut off by the main power switch 20. Furthermore, although single-phase power is suggested as the power in this specification, it will be apparent to those skilled in the art that three-phase power may also be suggested as the power.

[0014] In this specification, the standby power cut-off device 30 is simply referred to as the cut-off device 30.

[0015] The microprocessor 2 according to the embodiment of the present invention performs calculations, analysis, comparison, time control, detection, judgment, high frequency generation, etc., and controls the overall operation and functions of the cutoff device 30. Furthermore, the microprocessor 2 may be a general-purpose MPU, or may be a single semiconductor device having the functions of a CPU, such as an MCU, a RISC processor, or a DSP.

[0016] The interrupter 30 includes a control signal generator 14 for sending a control signal to the microprocessor 2 when a current flows in response to the operation of the manual switch 3. The control signal generator 14 is a photocoupler, a photo (MOS) FET, a reed switch, a relay, or the like. In this case, the photocoupler is a general composite photosensor that optically couples a light-emitting diode and a light-receiving diode and transmits an electrical signal between the two diodes that are electrically insulated from each other, and photocouplers include a phototransistor, a phototriac, and the like.

[0017] The low power supply unit 8 according to the embodiment of the present invention converts commercial AC power supplied from the solid state relay 7 into DC power as necessary, and supplies it to the microprocessor 2 and parts requiring power. The low power supply unit 8 employs a conversion method and a switching method. For example, the low power supply unit 8 may be a circuit in which a rectifier diode is connected to both terminals of one of a plurality of capacitors connected in series, a circuit in which a rectifier diode is connected to both terminals of a voltage regulator in which a capacitor, a resistor, and a diode are connected in series, a switch mode power supply (SMPS), an AC-DC converter, etc.

[0018] The solid-state relay 7 according to the embodiment of the present invention as an on / off control device is an AC conductive and output switch using one or more semiconductors that separate the input side and the output side from each other. Considering the method of separating the input side and the output side, the solid-state relay 7 is classified into a hybrid SSR, a transformer-coupled SSR, and an optically-coupled SSR as an input circuit. The hybrid SSR is a solid-state relay coupled with a reed relay, and a control signal is applied to the coil of the reed relay to operate a trigger circuit that operates a bidirectional thyristor (triac), and the relay is used as a switch. The transformer-coupled SSR is a solid-state relay coupled with a transformer, and a control signal is applied to a small, low-power transformer, and the bidirectional thyristor is operated using a secondary voltage generated by primary excitation. The optically-coupled SSR applies a control signal to, for example, a general light-emitting diode (LED), and the radiation generated from the LED turns on the bidirectional thyristor, which is a light-receiving semiconductor, and passes an AC current. For example, the optically-coupled SSR is a phototriac coupler, a bidirectional photo (MOS) FET, etc. In this case, the phototriac coupler is a general composite photosensor that optically couples a light-emitting diode and a light-receiving diode and transmits an electrical signal between the two diodes that are electrically isolated from each other, and if necessary, the phototriac coupler can be replaced with a phototransistor, photodarlington, photologic-IC, photocoupler, photoSCR, photoFED, etc., which have the same functions. In other cases, the optically coupled SSR applies a voltage to the light-emitting diode, which turns on the phototransistor optically coupled to the light-emitting diode, and the zero-cross circuit operates to turn on the triac near the zero voltage of the AC power, thereby transmitting AC.

[0019] The manual switch 3 according to the embodiment of the present invention is a non-locking switch whose contacts are connected only when operated. Preferably, the manual switch 3 is a tactile switch. Operation of the manual switch 3 connects the contacts in response to an operation such as pushing, pulling, or pressing the switch, turning the switch on. Stopping operation of the manual switch 3 means that the switch contacts are separated and the switch is turned off.

[0020] The interrupter 30 further includes a current limiting resistor 13 and a diode 22 connected in series with the manual switch 3 to reduce the current of the commercial AC power. The current limiting resistor 13 and the diode 22 limit and shunt the current of the commercial AC power supply, and serve to protect the manual switch 3, the control signal generator 14, and the solid-state relay 7 from excessive burnout. Furthermore, the diode 22 may be a constant voltage diode, a bridge diode, etc.

[0021] 3A and 3B, when the manual switch 3 is operated, the current is reduced by the current limiting resistor 13, and accordingly, when the control signal generator 14 is a phototransistor coupler, the current flows only in the forward direction. The current does not flow in the reverse direction. When the manual switch 3 is operated by a user at a frequency of 60 Hz for 0.5 to 1.5 seconds, the current flows in the control signal generator 14 and then stops, and this is repeated 30 to 90 times. By repeating the current flowing and not flowing in the control signal generator 14, the microprocessor 2 recognizes that the control signal generator 14 is sending multiple control signals and performs multiple operation control. The multiple control signals are generated by one-time operation of the manual switch 3, and in this case, it is preferable for the microprocessor 2 to perform one-time operation control.

[0022] To this end, the microprocessor 2 performs on or off operation control using a control method that includes a first step of repeatedly judging whether or not a control signal generated from the control signal generator 14 is present when the manual switch 3 is operated to generate a control signal from the control signal generator 14, a step of judging whether or not a predetermined period of time has elapsed if it is judged in the first step that the control signal is not present, and a second step of judging whether or not the control signal is not present, and when it is judged that the control signal is not present, it judges that the operation of the manual switch 3 has finally stopped, thereby preventing the occurrence of malfunction due to multiple operation control in response to multiple control signals from the control signal generator.

[0023] More specifically, the above method is as follows: For convenience of explanation, the control signal generator 14 is a phototransistor coupler. When the switch is pressed and operated, the light emitting diode (LED) of the phototransistor coupler emits light to activate the transistor, which causes the input of the microprocessor to go from a high state to a low state, thereby detecting the operation of the switch and stopping the operation of the switch.

[0024] 3B, the first control method by the operation of the manual switch 3 is as follows: In the first control method, when the manual switch 3 is operated, a first step is executed, and when a predetermined time has elapsed after the first step is executed, if a control signal exists, the microprocessor 2 returns to the first step, and if no control signal exists, the microprocessor 2 executes a second step so as to determine that the operation of the manual switch has finally been stopped.

[0025] Furthermore, since the frequency of the commercial AC power constantly fluctuates due to mechanical factors of the generator and load fluctuations, the predetermined time may become shorter or longer, and the predetermined time is determined so that the second step is not executed near the minimum operating voltage of phototransistor coupler 14. Therefore, even if the predetermined period is changed according to the operating voltage characteristics of phototransistor coupler 14, it is preferably 12.5 milliseconds as shown in FIG. 3A.

[0026] 3B, the second control method by operating the manual switch 3 is as follows: In the second control method, when the manual switch is operated, a first step is executed, and when a predetermined period has elapsed after the first step is executed, if a control signal exists, the microprocessor 2 executes a second step every time a predetermined period has elapsed, and if no control signal exists, the microprocessor 2 executes the second step so as to determine that the operation of the manual switch has finally been stopped.

[0027] If a control signal is present in the second step, the microprocessor 2 returns to the first step, but in the second control method, the second step is executed every time a predetermined time has elapsed. The predetermined period is preferably 1 / 60th of a second at a frequency of 60 Hz, and 1 / 50th of a second at a frequency of 50 Hz, which is the time of the frequency of commercial AC power.

[0028] Referring to FIG. 4, the third control method by operating the manual switch 3 is as follows.

[0029] In the third control method, the first step is executed when the manual switch 3 is operated, the second step is executed for a predetermined period of time after the first step is executed, and when the predetermined period of time has elapsed without a control signal, the microprocessor 2 determines that the operation of the manual switch has finally stopped. Of course, if there is a control signal in the second step, the microprocessor 2 returns to the first step. Furthermore, the given time is preferably 12.5 milliseconds.

[0030] When the electrical device 1 is off, the microprocessor 2 turns on the circuit breaker according to the above-mentioned control method, and conversely, when the electrical device 1 is on, the microprocessor 2 turns off the circuit breaker according to the above-mentioned control method.

[0031] The cutoff device further includes a power storage unit 5 that is charged with power received from the low power supply unit 8 and supplies power to the microprocessor 2. The power storage unit 5 supplies power to the microprocessor 2 or the wireless receiver 4 when the commercial AC power is cut off, and the power storage unit 5 is a battery, a supercapacitor, a hybrid battery, an ultracapacitor (with graphene), a large-capacity capacitor, or the like.

[0032] If the solid-state relay 7 shown in Fig. 1 is a phototriac with a zero-cross circuit, the current on its input side flows only in the forward direction, so the phototriac cannot be used. Therefore, the phototriac can be used if the current on its input side flows in the reverse direction.

[0033] Therefore, the interrupter 30 further includes a capacitor 18 that is charged and then discharged in response to the operation of the manual switch 3, allowing a current to flow even when the current in the solid-state relay 7 is not in the forward direction in response to the operation of the manual switch 3, and a resistor 19 connected in series with the capacitor 18. The resistor 19 serves to ensure that the charging voltage of the capacitor 18 is higher than the operating voltage of the solid-state relay 7.

[0034] 1 and 2, a solid-state relay 7 according to an embodiment of the present invention supplies commercial AC power to a low power supply unit 8 or cuts off the supply in response to the operation of a manual switch 3, and when a microprocessor 2 transmits a high frequency signal, the solid-state relay 7 further supplies commercial AC power to the low power supply unit 8 or cuts off the supply.

[0035] 1 and 2, there is a method in which the microprocessor 2 receives power by operating the solid-state relay 7 in response to the operation of the manual switch 3, and even if the operation of the manual switch 3 is stopped under the control of the microprocessor 2, the microprocessor 2 can stably receive power. Two of these methods will be described below.

[0036] As shown in FIG. 1, in the first embodiment of the present invention, first, the cutoff device 30 further includes a solid-state relay 21 controlled by the microprocessor 2, so that even if the operation of the manual switch 3 is stopped after the manual switch 3 is operated, power can be stably supplied to the microprocessor 2. In response to the operation of the manual switch 3, the time until commercial AC power is supplied to the low power supply unit 8 by the solid-state relay 7, the time until power is supplied from the low power supply unit 8 to the microprocessor 2, and the time until a current flows from the microprocessor 2 to the solid-state relay 21 and power is stably supplied to the microprocessor 2 are very short as in the case where the above operations are performed simultaneously, and power is stably supplied to the microprocessor 2 even if the operation of the manual switch 3 is stopped. In this case, a control signal is naturally generated from the control signal generator 14. When the manual switch 3 is operated again, the microprocessor 2 does not transmit a current to the solid-state relay 21 due to the control signal from the control signal generator 14, so that the commercial AC power supplied to the low power supply unit 8 is cut off.

[0037] FIG. 2 shows a standby power cutoff device according to a second embodiment of the present invention, in which instead of adding a solid state relay 21 as proposed in the first embodiment of the present invention to ensure that the microprocessor 2 receives power consistently, a low-value capacitor 16 and a discharge enabler 17 are added to enable the microprocessor 2 to directly control the solid state relay 7.

[0038] In order to enable the microprocessor 2 to stably receive power even if the operation of the manual switch 3 is stopped after the manual switch 3 has been operated, the interrupter device 30 further includes a low-capacity capacitor 16 for passing a predetermined high-frequency wave generated from the microprocessor 2 when the high-frequency wave passes through the input side of the solid-state relay 7 and flows to the ground. Furthermore, the interrupter device 30 includes a discharge enabler 17 for enabling the low-capacity capacitor 16 to discharge.

[0039] 2, a microprocessor 2 generates a predetermined high frequency wave, in which the waveform of the high frequency wave is preferably a square wave.

[0040] Furthermore, the low-capacity capacitor 16 according to the embodiment of the present invention refers to a low-capacity capacitor that passes high frequencies but does not pass commercial AC power.

[0041] Furthermore, the discharge enabler 17 according to the embodiment of the present invention serves to open a current path to facilitate discharge when charging or discharging the low-capacitance capacitor 16. The discharge enabler 17 is a diode, and a resistor may be used instead of the diode. In this case, the diode is preferably a Schottky diode.

[0042] In the second embodiment of the present invention shown in FIG. 2, a standby power cut-off device 30 is configured such that a predetermined high frequency generated by a microprocessor 2 passes through the input side of a solid-state relay 7 by a discharge enabler 17 and flows to ground via a low-capacity capacitor 16, thereby supplying commercial AC power from the output side of the solid-state relay 7 to a low-power supply unit 8, thereby enabling the microprocessor 2 to receive power stably.

[0043] The reason why the microprocessor 2 generates a predetermined high frequency and causes the predetermined high frequency to flow to ground via the low-capacity capacitor 16 which does not allow commercial AC power to pass through is that when the solid-state relay 7 is controlled by the microprocessor 2, electrical conflict between the operating voltage of the microprocessor 2 and the voltage of the commercial AC power is avoided.

[0044] With reference to FIG. 2, the operation of the interrupter 30 in response to the flow of current will now be described in detail.

[0045] When the manual switch 3 is operated to make the commercial AC power line 11 positive (+), a current flows through the resistor 13, the diode 22, the diode of the control signal generator 14, the diode of the solid-state relay 7, and the commercial AC power line 10. In this case, the control signal generator 14 is activated, and the low power supply unit 8 is activated by the solid-state relay 7.

[0046] In order to operate the low power supply unit 8 by the microprocessor 2, a square wave of a predetermined high frequency (for example, in the range of several tens of kHz) generated by the microprocessor 2 flows to ground via a resistor, a diode of the solid-state relay 7, and a low-capacity capacitor 16. In this case, the discharge enabler 17 assists the square wave charged and discharged in the low-capacity capacitor 16 to flow to ground, and the solid-state relay 7 operates the low power supply unit 8. As a result, even if the manual switch 3 is operated once and then not operated thereafter, the microprocessor 2 consistently receives power from the low power supply unit 8 under its control. Furthermore, if a triac 23 is disposed behind the solid-state relay 7, a large current can be passed even without a main power switch 20. In the first embodiment of the present invention shown in FIG. 1, a single triac 23 may be disposed behind the solid-state relay 7 and the solid-state relay 21 to pass a large current.

[0047] 1, the interruption device 30 further includes a main power switch 20 configured to allow the microprocessor 2 to supply commercial AC power to the electrical device 1 or to interrupt the supply of power. The main power switch 20 is a solid-state relay or a predetermined relay controlled by the microprocessor 2. In other cases, the main power switch 20 is coupled to a solid-state relay and one of a triac, a field-effect transistor (FET), an insulated gate bipolar transistor (IGBT), and a predetermined relay behind the solid-state relay. In this case, the relay includes a latching relay and a general-purpose relay.

[0048] Furthermore, the cutoff switch 30 includes an on / off control switch 9 configured to enable the microprocessor 2 to turn on / off the electric device 1. The on / off control switch 9 connected to the switch of the electric device 1 is a control switch for turning on / off the electric device 1 after the commercial AC power supply is connected to the electric device 1, and a relay, a reed switch, a transistor, or the like can be used as the control switch.

[0049] Furthermore, the standby power cutoff device 30 includes a wireless receiver 4 for transmitting a signal detected externally to the microprocessor 2. The wireless receiver 4 is a sensor device (for detecting temperature, pressure, current, sound, color, light, holes, communication, etc.) and transmits a signal detected according to the amount of fluctuation as an electrical signal to the microprocessor 2. The wireless receiver 4 may have a function of transmitting and receiving wireless signals.

[0050] Further, the wireless signal includes, but is not limited to, a wireless LAN signal transmitted to wireless Internet, an infrared signal received from a remote controller, a signal generated by a short-range wireless communication technology such as Bluetooth (registered trademark), NFC, Zigbee (registered trademark), and a signal generated by a wide-area wireless communication technology such as LoRa, 3G, LTE, 4G, 5G, etc. According to an embodiment of the present invention, the wireless signal means any wireless signal that transmits information to a remotely controlled area, such as radio waves, light, and sound waves.

[0051] The circuit breaker 30 further includes a voltage regulator 12 arranged behind the power storage unit 5 for supplying a stable voltage to the wireless receiver 4 .

[0052] In order to save the power supplied from the power storage unit 5, the cutoff device 30 is further configured so that the wireless receiver 4 is activated at predetermined intervals, rather than constantly. In this case, even if the wireless receiver 4 performs detection at predetermined times (intermittently), a continuous signal is transmitted by a one-time control of the transmitting device (e.g., a smartphone), but no malfunction occurs.

[0053] In order to conserve power supplied from the power storage unit 5, it is desirable for the microprocessor 2 to be in a standby sleep mode after operation.

[0054] Breaker device 30 further includes a voltage sensor 6 for detecting a charging voltage value of power storage unit 5. Power storage unit 5 is controlled so as to be charged in accordance with the charging voltage value detected by voltage sensor 6.

[0055] When the power storage unit 5 is a supercapacitor, the rated voltage needs to be higher than the supply voltage of the low power supply unit 8. If the rated voltage of the supercapacitor is lower than the supply voltage of the low power supply unit 8, the interruption time of the commercial AC power becomes shorter. Furthermore, the time constant means the time it takes for the supercapacitor to be charged to 62.8% of the power voltage. In general, when a time corresponding to five times the time constant has elapsed, the supercapacitor is charged to about 99% of its normal voltage. Furthermore, when the time required for the charge amount of the supercapacitor to reach a predetermined reference lower limit charge value from a predetermined reference upper limit charge value is detected by an experiment or the like, the supercapacitor is charged for a predetermined period according to the time required for the charge amount of the supercapacitor to reach a predetermined reference lower limit charge value from a predetermined reference upper limit charge value without providing the voltage sensor 6. Therefore, when the predetermined time has elapsed, the power storage unit 5 of the interruption device 30 is controlled to be charged for the predetermined time.

[0056] The interruption device 30 further includes an energy harvesting power supply unit 15 for charging the power storage unit 5. The energy harvesting power supply unit 15 includes, for example, solar cells and diodes, which charge the power storage unit 5 with small amounts of energy from various sources.

[0057] The energy harvesting power supply unit 15 harvests amounts of energy from sunlight, solar heat, electric lights, wind (windmills), and water (watermills). In addition, the energy harvesting power supply unit 15 harvests small amounts of energy from body movement and body temperature, and a certain amount of energy generated from a spiral spring.

[0058] Referring to FIG. 5A, an example is shown in which the storage unit 5 in the circuit diagram of FIG. 1 is a supercapacitor. The supercapacitor 5 is also simply called a supercapacitor. As shown in FIG. 5A, the supercapacitor 5 is first fully charged for a time period corresponding to 5 times the time constant (for example, 60 seconds), and then the active interrupt is set so that the supercapacitor 5 is charged again for 10 seconds, and then the microprocessor 2 is in standby mode and enters sleep mode. After 2.3 seconds in sleep mode, the microprocessor 2 wakes up and activates the voltage sensor 6, which detects whether the supercapacitor is at a predetermined minimum voltage. If the detected voltage is not the predetermined maximum voltage, the voltage sensor 6 is turned off and the microprocessor 2 enters sleep mode again. Next, after 2.3 seconds in sleep mode, the microprocessor 2 activates the voltage sensor 6 and causes the voltage sensor 6 to detect whether the charging voltage value of the supercapacitor 5 is at a predetermined minimum voltage value. If the detected voltage is lower than the predefined maximum voltage, the voltage sensor 6 is turned off, the supercapacitor 5 is charged for 10 seconds, and the microprocessor 2 goes back to sleep mode again.

[0059] With reference to FIG. 1, the wireless signal interrupt and the external interrupt shown in FIG. 5B will be described. The microprocessor 2 determines the on / off state of the electric device 1 generated by the signal of the wireless receiver 4 generated by the manual switch 3 or the control signal of the control signal generator 14 according to the operation of the main power switch 20. When the main power switch 20 is turned off and it is determined that the electric device 1 is in the off state, the on operation is performed. First, the solid-state relay 21 is operated to charge the supercapacitor 5. Next, the main power switch 20 is operated (turned on) to supply commercial AC power to the electric device 1. Thereafter, the time is delayed until the inrush current generated during the power supply becomes a normal current, and the electric device 1 is turned on by the relay 9 as an on / off control switch connected to the power unit of the electric device 1. Next, the relay 9 is turned off, and a recovery operation is performed after a predetermined time has elapsed. Furthermore, the microprocessor 2 recognizes the on / off state of the electric device 1 through the on / off state of the main power switch 20 by the signal of the wireless receiver 4 generated by the manual switch 3 or the control signal of the control signal generator 14. When the main power switch 20 is turned on and it is determined that the electrical device 1 is in the on state, an off operation is performed. First, the solid-state relay 21 is operated to charge the supercapacitor 5. Next, the electrical device 1 is turned off by the relay 9 connected to the power supply unit of the electrical device 1, and after a predetermined time has elapsed, the main power switch 20 and the solid-state relay 21 are sequentially turned off. After the predetermined time has elapsed, a recovery operation is performed.

[0060] Although specific embodiments have been illustrated and described herein, those skilled in the art will recognize that any specific arrangement of software calculated to achieve the same purpose may be substituted for the specific embodiments illustrated. This application is intended to cover any adaptations or variations of the present invention. Therefore, it is manifestly intended that this invention be limited only by the claims and the equivalents thereof. [Industrial Applicability]

[0061] According to an embodiment of the present invention, the standby power cut-off device can determine that the operation of the manual switch has stopped even while multiple control signals are being generated by the operation of the manual switch, can prevent malfunctions due to multiple operation control of the microprocessor, can completely cut off standby power when the power to the electrical equipment is turned off, and can enable Internet of Things (IoT) devices to communicate with each other at least using electrical energy, and therefore the standby power cut-off device can be widely applied to electrical equipment.

Claims

1. A standby power cutoff device that is installed on a power line that connects an external commercial AC power source and the inside of an electrical device, A manual switch for supplying or cutting off commercial AC power; a solid-state relay that supplies the commercial AC power to an output side of the solid-state relay when a current flows to an input side of the solid-state relay in response to an operation of the manual switch; a low power supply unit that converts a voltage of the commercial AC power supplied from the solid state relay and supplies the converted voltage; a microprocessor that receives power from the low power supply and controls operation of the standby power cutoff device; a power storage unit that is charged with the power received from the low-power supply unit and supplies the power to the microprocessor; a control signal generator that transmits a control signal to the microprocessor when the current flows in response to the operation of the manual switch; The microprocessor comprises: a first step of repeatedly determining whether the control signal of the control signal generator is present when the manual switch is operated to permit generation of the control signal from the control signal generator; determining whether a predetermined period of time has elapsed after the first step is performed; a second step of determining whether the control signal is present; A standby power cut-off device that controls the operation of the standby power cut-off device using a control method, in which when the predetermined period of time has elapsed after the first step is executed, the microprocessor executes the second step, and when it is determined in the second step that the control signal is present, the microprocessor returns to the first step, and when it is determined that the control signal is not present, the microprocessor finally determines that the operation of the manual switch has been stopped.

2. A standby power cutoff device that is installed on a power line that connects an external commercial AC power source and the inside of an electrical device, A manual switch for supplying or cutting off commercial AC power; a solid-state relay that supplies the commercial AC power to an output side of the solid-state relay when a current flows to an input side of the solid-state relay in response to an operation of the manual switch; a low power supply unit that converts a voltage of the commercial AC power supplied from the solid state relay and supplies the converted voltage; a microprocessor that receives power from the low power supply and controls operation of the standby power cutoff device; a power storage unit that is charged with the power received from the low-power supply unit and supplies the power to the microprocessor; a control signal generator that transmits a control signal to the microprocessor when the current flows in response to the operation of the manual switch; The microprocessor comprises: a first step of repeatedly determining whether the control signal of the control signal generator is present when the manual switch is operated to permit generation of the control signal from the control signal generator; determining whether a predetermined period of time has elapsed after the first step is performed; a second step of determining whether the control signal is present; A standby power cut-off device that controls the operation of the standby power cut-off device using a control method, in which the microprocessor executes the second step when the predetermined period has elapsed after the first step has been executed, and if it is determined in the second step that the control signal is present, the second step is executed every time a predetermined period has elapsed, and if the control signal is not present, the microprocessor ultimately determines that the operation of the manual switch has been stopped.

3. A standby power cutoff device that is installed on a power line that connects an external commercial AC power source and the inside of an electrical device, A manual switch for supplying or cutting off commercial AC power; a solid-state relay that supplies the commercial AC power to an output side of the solid-state relay when a current flows to an input side of the solid-state relay in response to an operation of the manual switch; a low power supply unit that converts a voltage of the commercial AC power supplied from the solid state relay and supplies the converted voltage; a microprocessor that receives power from the low power supply and controls operation of the standby power cutoff device; a power storage unit that is charged with the power received from the low-power supply unit and supplies the power to the microprocessor; a control signal generator that transmits a control signal to the microprocessor when the current flows in response to the operation of the manual switch; The microprocessor comprises: a first step of repeatedly determining whether the control signal of the control signal generator is present when the manual switch is operated to permit generation of the control signal from the control signal generator; determining whether a predetermined period of time has elapsed after the first step is performed; a second step of determining whether the control signal is present; The microprocessor controls the operation of the standby power cut-off device using a control method in which, after the first step is executed, the microprocessor repeatedly executes the second step during the predetermined period, and when the predetermined period has elapsed without the control signal, finally determines that the operation of the manual switch has been stopped.

4. 4. The standby power cut-off device according to claim 1, further comprising a current limiting resistor and a diode connected in series with the manual switch to reduce a current of the commercial AC power.

5. 4. The standby power cut-off device according to claim 1, further comprising a solid-state relay controlled by the microprocessor so that power is stably supplied to the microprocessor even if the operation of the manual switch is stopped after the manual switch is operated.

6. 4. The standby power cut-off device according to claim 1, further comprising a low-capacity capacitor for passing a predetermined high frequency generated from the microprocessor when the predetermined high frequency generated from the microprocessor passes through the input side of the solid-state relay and then flows to ground, so that the microprocessor can stably receive the power even if the operation of the manual switch is stopped after the manual switch is operated.

7. 4. The standby power cut-off device according to claim 1, further comprising a wireless receiver for transmitting a signal detected outside the standby power cut-off device to the microprocessor.

8. 4. The standby power cut-off device of claim 1, further comprising a main power switch configured to supply the commercial AC power to the electrical device or cut off the supply of the power.

9. The standby power cut-off device according to claim 1 , further comprising an on / off control switch configured to enable the microprocessor to turn on / off the electrical appliance.

10. The standby power cutoff device according to claim 1 , further comprising a voltage sensor that detects a charging voltage value of the power storage unit.

11. The standby power cut-off device according to claim 1 , further comprising an energy harvesting power supply unit for charging the power storage section.

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