KR100967209B1 - Method and system for automatically breaking and releasing a standby power breaker - Google Patents

Abstract

PURPOSE: A method and a system for breaking and releasing standby power are provided to improve the convenience of use by automatically supplying external power to a standby power breaker if the external power is necessary. CONSTITUTION: A main circuit breaker(1) breaks external power supply. A standby power breaker(4-6) breaks the external power supply to an electronic device except for the electric device connected to a normal power circuit breaker(2,3). A switch relay(7) connects the main circuit breaker to a standby power breaker. A current transformer senses the current outputted from the standby power breaker. A current amplifier amplifies the current outputted from the current transformer. A control system controls the switch relay according to the amount of currents outputted from the current amplifier.

Description

Standby Power Blocking and Unblocking System, and Standby Power Blocking Method {METHOD AND SYSTEM FOR AUTOMATICALLY BREAKING AND RELEASING A STANDBY POWER BREAKER}

Some embodiments of the present invention relate to a standby power interruption and disconnection system and a standby power interruption method. In more detail, some embodiments of the present invention divide the breaker into a breaker for always-on power supply and a breaker for standby power supply to shut off the external power when the standby power is in the standby power state, and when external power supply is required. Is related to a system that automatically turns off standby power.

Recently, at home and abroad, various plans such as carbon emission trading and nurturing new and renewable energy business are being promoted as part of energy conservation practice.

The International Energy Agency estimates that in the OECD countries, 60 watts (W), or 10 percent of household electricity consumption, will be standby. Here, "standby power" refers to power consumed by electrical / electronic products even when the power is turned off. Copiers and video recorders are estimated to be 80% of the total consumption. Electrical and electronic products that consume large amounts of standby power include computers, monitors, printers, fax machines, washing machines, air conditioners, televisions, DVD players, microwave ovens, and cell phone chargers.

The current electrical distribution configuration has only breakers for supplying power at all times without distinguishing the purpose of the power supply, and thus it is not possible to prevent products that do not need the power supply to consume standby power.

According to the Korea Institute of Industrial Technology Testing, the electricity consumed as standby power is 11% of the average consumption of general households, and is 856,000kW annually nationwide, which is similar to the amount produced by a nuclear power plant.

When the home network (ubiquitous house) is generalized, the amount of standby power will increase significantly, and it is estimated that it will occupy 25% of home consumption power in about 10 years. The government is trying to minimize the energy waste caused by standby power. korea) 2010].

Meanwhile, KEPCO requires a 17.7% increase in electricity rates in 2009, and the government is considering a 9% increase in 1H. Therefore, in Korea, we are launching products to lower or cut off standby power for electronic products, but the limitations of electronics manufacturing technology and standby power blocking products are applied only to specific electronic products or are inconvenient in installation / installation. There is no significant effect, and there is a need for a standby power blocking system that can drastically reduce such standby power.

In order to solve the above problems, the current electric distribution configuration that is being constructed without distinction of power for each use is divided into a constant power supply and a standby power supply, and the electrical and electronic products connected to the standby power supply are not used. There is a need for a standby power blocking system that can block the supply of standby power to these electrical and electronic products.

In addition, when using electrical and electronic products in the standby power supply is cut off, there is a need for a standby power disconnection system that can be automatically supplied with power.

A standby power interruption and disconnection system and a standby power interruption method are provided, which are essentially the same as shown or described with at least one of the figures, more fully described in the claims.

Standby power cut-off system according to an embodiment of the present invention, the switching relay which is switched to supply or cut off the power applied from the outside; A standby power supply circuit breaker that is connected to the switching relay and cuts off the power supply to the electrical and electronic products that do not need to supply power at all times; And a control unit for switching the switching relay so that the externally applied power is not supplied to the electrical and electronic product when the electrical and electronic product is determined to be in the standby power state based on the current supplied from the standby power supply circuit breaker. Include.

Preferably, the standby power cut-off system, the main circuit breaker directly receiving the externally applied power; A regular power supply circuit breaker that is always supplied with power from the main circuit breaker; A current transformer for modifying and sensing a current supplied from the breaker for standby power supply; And a current amplifier for amplifying the current supplied from the current transformer, wherein the controller is configured to determine whether a standby power state is received by receiving the current amplified by the current amplifier.

The transfer relay may include a coil unit connected to the control unit to receive power; And a switching switch which is switched to cut off the external power supply when the coil part is supplied with power.

The control unit includes a central processing unit (CPU) for determining whether the standby power state; And an automatic system for automatically supplying power to the coil unit upon receiving standby power state information from the central processing unit.

At this time, the automatic system includes a timer set to a predetermined time, and after receiving the standby power state information from the central processing unit, if the time set for the timer elapses, characterized in that for automatically supplying power to the switching relay. do.

On the other hand, when the control unit determines that the standby power state, the current sensed by the current transformer is less than 0.005 (A).

Preferably, the switch of the transfer relay, the standby power supply circuit breaker, the current transformer, the current amplifier and the timer are connected to each other.

Preferably, the central processing unit, based on the current supplied from the current amplifier, characterized in that for calculating at least one of the current flowing through the electrical and electronic products, voltage, power factor.

The standby power cut-off system further includes a display for displaying the electricity use state information, the central processing unit preferably monitors the electricity use state information displayed on the display.

Standby power cut-off method according to another embodiment of the present invention, the step of modifying and sensing the current supplied from the standby power supply circuit breaker; Amplifying the modified current; Determining, by the controller, whether a standby power state is based on the amplified current; If it is determined that the standby power state, the control unit includes a step of switching the switching relay from one side to the other to block the external power supply to the standby power supply circuit breaker,

The transfer relay includes a coil unit to receive power from the control unit,

When the coil unit receives power from the control unit, the switching relay is characterized in that the transfer from one side to the other side.

Standby power cut-off system according to another embodiment of the present invention, the switching relay which is switched to supply or cut off the power applied from the outside; A standby power supply circuit breaker that is connected to the switching relay and cuts off the power supply to the electrical and electronic products that do not need to supply power at all times; And a control unit for switching the switching relay so that the externally applied power is not supplied to the electrical and electronic products when the electrical and electronic products are determined to be in the standby power state based on the current supplied from the standby power supply circuit breaker. A temporary power supply for supplying temporary power to the transfer relay when the transfer relay is switched to cut off the external power supply; A current transformer connected to the standby power supply breaker and configured to detect and modify a current supplied from the temporary power supply; And a current amplifier for amplifying the current supplied from the current transformer.

The controller, if it is determined that the current amplified by the current amplifier is not in the standby power state, characterized in that for switching the switching relay so that the externally applied power is supplied.

In this case, the transfer relay may include a coil unit receiving power from the controller in a standby power state; And when the power is supplied from the control unit, it is preferable to include a switch to be switched to the coil unit side to cut off the external power supply.

Preferably, if the control unit does not determine that the standby power state does not supply power to the coil unit, the switch is characterized in that the switch is switched from the coil side to the other side to supply external power.

These and other advantages, aspects and novel features of the present invention will become more fully understood from the following detailed description and drawings, together with the details of the embodiments illustrated in this regard. .

According to an embodiment of the present invention, the current electric distribution configuration that is being constructed without distinguishing the power for each use is divided into a constant power supply and a standby power supply, and the electrical and electronic products connected to the standby power supply are not used. By preventing standby power supply to these electrical and electronic products, unnecessary waste of energy can be minimized.

In addition, in the state in which the external power supply is cut off by the standby power supply circuit breaker, when one of the electrical and electronic products connected thereto is used, the external power may be automatically supplied to the standby power supply circuit breaker for convenience of use.

In addition, by replacing or installing a new breaker, the standby power can be automatically cut off or restored, so all the technologies in the switchgear are extinguished, unlike the existing products whose appearance is not clean due to the need for additional equipment such as sensors, timers and outlets. Therefore, the facility is not exposed to the outside, so it can save power while maintaining a clean appearance.

1 is a schematic configuration diagram of a standby power cut-off and disconnection system according to an embodiment of the present invention, Figure 2 is a power supply circuit breaker and standby power supply circuit breaker and power electronics according to an embodiment of the present invention This figure shows the connection status of the product.

Referring to FIG. 1, the standby power cut-off and disconnection system includes a main breaker 1, a breaker 2, 3 for standby power supply, breakers 4, 5, 6 for standby power supply, and a switching relay 7. (POWRE RELAY), current transformers (8, 9, 10), current amplifiers (14, 15, 16), central processing unit (12), control system (13), temporary power supply (11), and the like.

The main breaker 1 (MAIN NFB: No Fuse Breaker) receives an AC 220 (V) voltage from the outside, and the main breaker 1 normally maintains a disconnection state. This main breaker serves to interrupt the external power supply.

1 and 2 disclose a standby power interruption system with two normally powered circuit breakers 2 and 3 and three standby power circuit breakers 4, 5 and 6. Referring to these drawings, the power supply breakers (NFB 1 and NFB 2) is connected to the refrigerator, kimchi refrigerator, boiler, etc. in the kitchen, the living room and the telephone in the room, and the standby power supply breaker is the home of the living room Connected to theaters, TVs, audio and televisions in homes, various electronics, and TVs and appliances in kitchens (NFB 3), to washing machines and to computers, monitors, printers and other electronics in rooms 1 and 2; (NFB 4), air conditioning and treadmills in the living room (NFB 5).

The power supply breaker (2, 3) and standby power supply breaker (4, 5, 6) is connected to the main circuit breaker (1) and electrical and electronic products, the external power supplied from the main circuit breaker (1) It plays a role in controlling the supply of the product. Since the power supply breakers 2 and 3 are normally kept in a disconnected state, external power is always supplied to the electrical and electronic products connected to these breakers.

A switching relay 7 is provided between the main breaker 1 and the breaker 4, 5, 6 for standby power supply. The transfer relay 7 includes a transfer switch and a coil unit. When power is supplied to the coil unit, the transfer switch is transferred to the coil unit side. That is, when power is supplied to the coil part, the transfer switch is switched to the right side of the coil part side by electromagnetic principle, and to the left side when the power is not supplied. At this time, the power supplied to the coil unit is the power supplied from the timers 18, 19, and 20 of the control system to be described below.

When the transfer switch is switched to the left side (① side), the external power supplied through the main breaker 1 is supplied to the standby power supply breakers 4, 5, 6 and the electrical and electronic products connected thereto, and the transfer switch Is switched to the right (No. ② side), the external power is not supplied to the standby power supply breaker (4, 5, 6), the standby power supply breaker (4, 5, 6) and the temporary power supply ( 11) is connected, the temporary power is supplied to the electrical and electronic products connected to the standby power supply breakers (4, 5, 6).

Referring to FIG. 2, the first standby power supply breaker NFB 3 is connected to a home theater of a living room, a TV, a TV of an audio and a home, various electronic products, and a TV of a kitchen. If any one of these electrical and electronic products is in use (power ON state), since the external power must be supplied through the first standby power supply circuit breaker (NFB 3), the switch of the switching relay maintains the state of switching to the left.

On the other hand, when all the electrical and electronic products connected to the first standby power supply breaker (NFB 3) are not in use (all of the power is OFF), the switch of the switching relay 7 is switched to the right so that the external power (standby power) Prevents supply to standby power supply breakers 4, 5, and 6. Therefore, it is possible to prevent the electrical and electronic products connected to the first standby power supply breaker NFB 3 from consuming the standby power externally.

The transfer relay 7 is equally connected to the breakers 4, 5, 6 for standby power supply. For example, the first switching relay PR1 is connected to the first standby power supply circuit breaker 4, and the second switching relay PR2 is connected to the second standby power supply circuit breaker 5.

The current flowing through the standby power supply breakers 4, 5 and 6 is supplied to the current transformers 8, 9 and 10, and the supplied current is modified in the current transformers 8, 9 and 10. The current transformers 8, 9 and 10 are installed to correspond to the breakers 4, 5 and 6 for standby power supply. That is, the first standby power supply circuit breaker 4 is connected to the first current transformer 8 and the second standby power supply circuit breaker 5 is connected to the second current transformer 9.

In a state where the power of all electrical and electronic products connected to the first standby power supply circuit breaker 4 is turned off, the current flowing through the first standby power supply circuit breaker 4 is transmitted to the first current transformer 8. It is denatured. At this time, since the power of all the electronic products connected to the first standby power supply circuit breaker 4 is turned off, the first current transformer 8 detects a microcurrent of less than about 0.005A.

The current sensed by the current transformers 8, 9, and 10 depends on the type and number of electrical and electronic products connected to the first standby power supply circuit breaker 4, but in the case of a radio which consumes relatively little standby power, Current of less than about 0.005A is sensed by the current transformers 8, 9, and 10 in this OFF state, and therefore, when current less than 0.005A is sensed by the current transformers 8, 9, and 10, the first standby power supply breaker It can be determined that the power of all the electrical and electronic products connected to (4) is turned off. However, the magnitude of the current to determine the standby power state may vary depending on the degree of development of electrical and electronic technology.

Since the current sensed by the current transformers 8, 9 and 10 is too weak, it is necessary to amplify the modified current in order to accurately determine whether the current is in the standby power state. Therefore, the current transformers 8, 9 and 10 and the current amplifiers 14, 15 and 16 are connected to each other. The current amplifiers 14, 15 and 16 are installed to correspond to the current transformers 8, 9 and 10. The current delivered to the current amplifiers 14, 15, 16 is amplified by a predetermined multiple.

The current amplified by the current amplifiers 14, 15, and 16 is transferred to the controller. The controller is composed of a central processing unit 12 (CPU), a control system 13, and the like, and the amplified current is transferred from the current amplifiers 14, 15, and 16 to the central processing unit 12. The CPU 12 determines whether the electrical and electronic products connected to the standby power supply breakers 4, 5, and 6 are in the standby power state based on the transmitted current. For example, if the current amplifier 14, 15, 16 amplifies the current 10 times, if the central processing unit 12 senses a current of less than about 0.05A, the standby power supply circuit breaker (4, 5) , 6) it can be determined that the electrical and electronic products connected to the standby power state.

When there are a plurality of current amplifiers 14, 15, and 16, the CPU 12 is an electrical and electronic product connected to each of the standby power supply breakers 4, 5, and 6 based on the current received from each amplifier. It is determined whether it is in the standby power state. That is, the control unit is set to the current reference value that can determine the standby power state is determined to be a standby power state if less than the preset value, and if it exceeds the preset value is determined that the standby power state is not.

For example, all of the electronic devices connected to the first standby power supply circuit breaker 4 are all turned off, and any one of the electronic devices connected to the second standby power supply circuit breaker 5 is kept in use (ON state). If so, the CPU 12 determines that the standby power state is only associated with the first standby power supply circuit breaker 4.

When the CPU 12 determines that the electrical and electronic products connected to the standby power supply breakers 4, 5, and 6 are in the standby power state, the CPU 12 transmits a signal regarding the standby power state information to the control system 13.

The control system 13 comprises timers 18, 19, 20, which timers 18, 19, 20 are correspondingly connected with a transfer relay. For example, the first timer 18 is connected to the coil portion of the first transfer relay PR1 and the second timer 19 is connected to the coil portion of the second transfer relay PR2 (in FIG. 1, for convenience of illustration). The first timer 18 is connected to a part of the nose of the third switching relay PR3).

A predetermined time is set in the timers 18, 19, and 20. When a predetermined time elapses after the standby power state signal is received from the CPU 12, power is automatically supplied to the coil unit of the transfer relay 7. To transfer the transfer switch from left to right. As described above, when power is supplied to the coil unit, the transfer switch is transferred to the coil unit side by the principle of the electromagnetic field.

When the transfer switch is switched to the right by the power supply of the timers 18, 19, and 20, the external power supply is cut off by the standby power supply breakers 4, 5, and 6, and the temporary power supply 11 temporarily Power is supplied. At this time, since the power consumed by the temporary power supply 11 is much less than when the external power source to the standby power it can be seen a power saving effect.

On the other hand, the CPU 12 receives the amplified current from the current amplifier to measure the voltage, power factor, etc. to calculate the active power, electricity bills, monitor the time and breaker status, and display information useful to the user among the calculated data Transfer to section 17.

The display unit 17 displays on the monitor a current integrated power amount, a current power consumption amount, an estimated electric charge, a breaker state, and the like, based on the information received from the CPU 12. By providing the display unit 17 displaying predetermined information in this way, it is possible to provide the user with status information on electricity use.

On the other hand, when the standby power supply is cut off by the standby power cut-off system, when the TV power is turned on to use one of the electronic products connected to the standby power supply breakers 4, 5, 6, for example, a TV, the standby power is turned on. Unblock the blocking system to supply external power. At this time, the power is supplied from the temporary power supply device 11 before the external power is supplied to the TV.

That is, in the state where the transfer switch of the transfer relay 7 is switched to the right side, at the moment of receiving the TV power recovery signal, the temporary power is supplied through the temporary power supply 11 connected to the transfer relay 7. . As shown in FIG. 1, the temporary power supply 11 is connected to the switching relay 7 so that temporary power is supplied when the switch of the switching relay 7 is switched to the right and the external power supply is cut off. .

Therefore, when the temporary power is supplied from the temporary power supply device 11 to the switching relay 7, the circuit breaker 4, 5, 6 for standby power supply is provided even when the switch of the switching relay 7 is switched to the right. Temporary power can be supplied to the connected electrical and electronic products, and a degeneration current of 0.005 A or more is sensed in the current transformers 8, 9 and 10.

The current denatured in the current transformers 8, 9, 10 is supplied to the current amplifiers 14, 15, 16, and the current amplified in the current amplifiers 14, 15, 16 is transferred to the central processing unit 12. The CPU 12 determines the power supply state based on the amplified current received. That is, the CPU 12 that receives a larger current than the standby power state determines that the standby state is not in the standby state.

If the CPU determines that it is not in the standby power state, it transmits this information signal to the control system 13, where the timers 18, 19, and 20 of the control system 13 supply power to the coil portion of the transfer relay 7. The supply is stopped automatically. As described above, when power is not supplied to the coil portion of the transfer relay, the transfer switch is automatically switched to the left side (the opposite side of the coil portion), and thus external power is supplied to the standby power supply breakers 4, 5, and 6. .

Hereinafter, the operation sequence of the standby power cut-off system according to an embodiment of the present invention will be described with reference to the drawings shown in FIG. 3 is a view for explaining a standby power blocking method according to an embodiment of the present invention. For convenience of description, it will be described taking an electrical and electronic product connected to the first standby power supply circuit breaker as an example.

In a state where all the electrical and electronic products connected to the first standby power supply circuit breaker 4 are all powered off and only the TV is turned on (S310), the switch of the first switching relay 7 is switched to the left. Therefore, all electrical and electronic products except TV consume standby power.

At this time, when the power of the TV is also turned off (S320), all electrical and electronic products connected to the first standby power supply circuit breaker 4 consume external power as standby power.

In the standby power state, the current flowing through the first standby power supply circuit breaker 4 is transmitted to the first current transformer 8, and the first current transformer 8 detects the received current by denaturing it (S330). In this case, less than about 0.005 A current will be sensed in the first current transformer 8.

The current denatured in the first current transformer 8 is transmitted to one of the current amplifiers 14, 15, and 16 (in FIG. 1 to the third amplifier), and the third current amplifier 16 receives the received modified current. Amplify by a multiple (S340).

The current amplified by the third current amplifier 16 is transferred to the CPU 12, and the CPU 12 determines whether the standby power state is based on the received current (S350). If determined to be in the standby power state, the CPU 12 transmits this information signal to the control system 13.

The control system 13 receiving the standby power state information signal is connected to a timer corresponding to the first standby power supply circuit breaker 4 (in FIG. 1, corresponding to the first standby power supply circuit breaker 4). Connected to the third timer 20 is transmitted to the control signal (S360), the third timer 20 receives the received when the predetermined time exceeds the predetermined time to the coil unit of the first switching relay (PR1) It will automatically supply power.

When the coil unit of the first transfer relay PR1 receives power from the third timer 20 of the control system 13, the transfer switch of the first transfer relay PR1 is moved from the left side (① side) to the right side (② side). Switched to (S370) to cut off the external power supply to the first standby power supply circuit breaker (4).

By such a process, when the external power supply is cut off by the first standby power supply circuit breaker 4, the standby power supplied from the outside may be prevented from flowing into the electrical and electronic products connected thereto.

Next, a process of automatically supplying external power when the TV power recovery signal is received from the outside in the state where standby power supply is cut off will be described with reference to FIG. 4. 4 is a view for explaining a method for releasing standby power by the standby power disconnection system according to an embodiment of the present invention. For convenience of explanation, it is assumed that the TV power source is turned on.

When the TV power is turned on (S410), the temporary power is supplied from the temporary power supply device 11 to the first switching relay PR1 (S420). At this time, since the switch of the first switching relay PR1 is switched to the right side, only the power supplied from the temporary power supply device 11 is supplied to the external power supply, not to the first standby power supply circuit breaker 4. The first standby power supply circuit breaker 4 is supplied.

Temporary power supplied through the first standby power supply circuit breaker 4 is modified in the first current transformer 8 and sensed as a modified current (S430), where the current sensed by the first current transformer 8 is 0.005A. It becomes abnormal.

The current modified by the first current transformer 8 is supplied to the third current amplifier 16 and amplified (S440), and the current amplified by the third current amplifier 16 is transferred to the CPU 12. The central processing unit 12 determines whether the standby power state on the basis of the received amplification current (S450).

If the value output from the current amplifier is greater than or equal to the predetermined value, the CPU 12 determines that the state is not in the standby power state and sends a signal to the control system 13. The control system 13 that receives the signal that is not in the standby power state transmits a signal for controlling the third timer 20 (S460), and the third timer 20 receives the control signal to transmit the first switching relay ( The power supply to the coil part of PR1) is stopped.

When the power supply to the coil unit is stopped, the transfer switch of the first transfer relay PR1 is switched from the right side (② side) to the left side (① side) (S470), and the external power flowing through the main circuit breaker 1 is removed. 1 Standby power flows through the circuit breaker 4 for power supply. At this time, as the transfer switch of the first transfer relay PR1 is switched to the left side, the power supply through the temporary power supply device 11 is stopped, and the electrical and electronic products connected to the first standby power supply circuit breaker 4. Can continue to supply external power stably.

While the invention has been described above with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit of the invention. . In addition, various modifications may be made to adapt a particular situation or material requirement to the teachings of the present invention without departing from its spirit. Accordingly, the invention is not limited to the specific embodiments disclosed, and it is intended that the invention encompass all embodiments falling within the spirit of the appended claims.

1 is a schematic diagram of a standby power cut-off and disconnection system according to an embodiment of the present invention.

2 is a view showing a connection state of a power supply circuit breaker and standby power supply circuit breaker and electrical and electronic products according to an embodiment of the present invention.

3 is a view for explaining a method for blocking standby power by the standby power system according to an embodiment of the present invention.

4 is a view for explaining a method for releasing standby power by the standby power release system according to an embodiment of the present invention.

Claims (14)

In the standby power blocking system for preventing the external power is consumed as standby power through the distribution panel configuration, A main circuit breaker that regulates an externally supplied power supply; A regular power supply circuit breaker for intermittently supplying power supplied from the main circuit breaker to electric and electronic products requiring constant power; A standby power supply circuit breaker connected to the main circuit breaker to control external power supply to electronic products other than electrical and electronic products connected to the power supply circuit breaker; A temporary power supply for supplying temporary power; A switching relay connecting the main circuit breaker and the standby power supply circuit breaker when switched to one side, and connecting the temporary power supply device and the standby power supply circuit breaker when the other switch is performed; A current transformer for modulating and sensing a current output from the standby power supply circuit breaker; A current amplifier for amplifying the current output from the current transformer; And When the current output from the current amplifier is less than a predetermined value, the switching relay is controlled to be switched to the other side, and when the current output from the current amplifier is greater than or equal to a predetermined value when the switching relay is switched to the other side, the switching relay is performed. The control is standby power cut-off system so that is transferred to one side. delete delete The method according to claim 1, The transfer relay, A coil unit connected to the control unit to receive power; And And a transfer switch which is switched to block external power supply when the coil unit receives power. The method according to claim 4, The control unit, A central processing unit (CPU) for determining whether a standby power state is present; And And an automatic system for automatically supplying power to the coil unit when receiving standby power state information from the central processing unit. The method according to claim 5, The automatic system includes a timer for setting a predetermined time, The standby power cut-off system, characterized in that for automatically supplying power to the switching relay when the time set by the timer after receiving the standby power state information from the central processing unit. delete The method according to claim 6, The switch of the transfer relay, the standby power supply circuit breaker, the current transformer, the current amplifier and the timer are connected to each other correspondingly standby standby power system. The method according to claim 5, The central processing unit automatically cuts off the standby power supply circuit breaker, characterized in that for calculating at least one of the current, voltage, power factor. The method according to claim 9, Further comprising a display for displaying the electricity use status information, And the central processing unit monitors the electricity use state information displayed on the display. delete delete delete delete

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