JPH0145818B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a household power control device that controls a passing current passing through a service line so that it does not exceed a specified current.

Normally, all of the electrical equipment used in a typical household is not used at the same time, so the power contracted with the electric power company is set lower than the total power consumption of all the electrical equipment owned. Therefore, when using an air conditioner in the summer, the power consumption often exceeds the contracted power, causing the inconvenience of a breaker installed by the power company opening and causing a so-called power outage.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to cut off power to some loads based on priorities set in advance in a programming device when the passing current passing through a service line exceeds a specified current. A home power control device that can always maintain the passing current within the specified current range to avoid power outages, and also allows you to easily check if you have forgotten to turn off electrical devices when you go out or check before going to bed. is to provide.

1 to 4 regarding one embodiment of the present invention.
This will be explained with reference to the figures. Reference numeral 1 denotes a drop-in line for an AC power source that is led indoors via an integrated wattmeter, and an indoor load-side wiring 4 is connected to this via a detector 2 that detects the passing current of the drop-in line 1 and a switch 3. There is. 5 is an A-D converter that converts the detection output of the detector 2 into direct current and then into a digital signal; 6
1 is a memory that rewrites and stores the output from the A-D converter 5 at regular intervals, 7 is a main controller that controls the entire device, and 8 is a main controller that controls the energization/disconnection priority of multiple loads as will be described later. A memory device 9 stores programs such as cycles, and an operating device 9 provides a command signal to the main controller 7 and instructs the memory device 8 to rewrite the program.The memory device 8 and the operating device 9 constitute a program device 10. has been done. Reference numeral 11 denotes a base load input device, which is designed to set the total current for septic tanks, clocks, night lights, etc. that are constantly used at home. Reference numeral 12 denotes a base load memory for storing the current value set in the base load input device 11, and reference numeral 13 denotes a comparator as a discrimination device, which is stored in the memory 6 based on a command signal from the main controller 7. The magnitude of the current value is compared with the specified current value based on the contracted power stored in the program device 10 or the current value stored in the base load storage device 12, and a discrimination signal according to the comparison result is sent to the main controller 7. It is now output to . Reference numeral 14 denotes an alarm, which is set to sound in response to a command signal from the main controller 7. 15 is an oscillator 16 and a modulator 1
The transmitter consists of 7, and the oscillator 16 is, for example, 400Hz.
The modulator 17 generates a start bit output from the main controller 7 as shown in FIG. 3a.
D ₀ and 4-bit receiver selection code signals D ₁ to _{D 4}
The carrier wave is sequentially modulated by a digital signal consisting of the on/off signal _D5 and the on/off signal D5, and the modulated carrier wave (see Fig. 3b) is superimposed on the load side wiring 4. ing. Well, 1
8 to 23 are electrical outlets connected to the load side wiring, and the electrical outlets 18 to 21 are connected to the receiver 24.
27 are connected. As shown in FIG. 2, these receivers 24 to 27 include a demodulator 28 that demodulates the modulated carrier wave superimposed on the load side wiring 4 and a code signal that individually generates different code signals. generator 29 and a comparator 3 that compares the demodulated signal with the signal from the code generator 29
0, and a latch 31 that stores the on/off signal sent from the transmitter 15 following the code signal.
The switch 32 is turned on and off based on the signal stored in the latch 31. 33
Loads 37 and 38 are connected to the outlets 24 to 27 via the receivers 24 to 27.
are loads directly connected to the outlets 22 and 23. The load 37 is, for example, a microwave oven, and the load 38 is, for example, an iron.
These loads 37 and 38 are electrical devices that need to be energized preferentially in the home. Also,
The load 33 is, for example, an oven;
4 is, for example, the first air conditioner, and load 3
5 is, for example, the second air conditioner, and the load 3
6 is, for example, a refrigerator. The storage device 8 of the program device 10 described above includes an operating device 9.
The priority order for energizing the loads 33 to 36 and the conditions for the energization/disconnection period are stored. And the priority order is load 33, load 34, load 3
5. The load 36 is stored in this order, and the load 33 is stored to be energized with priority next to the loads 37 and 38, and the loads 34 and 35 are
Power-off conditions are stored so that the power is cut off after 10 minutes and the power-off state is maintained for at least 3 minutes after the power cut, and when the power cut-off lasts for 30 minutes, the load 36 is given priority for the next 30 minutes. It is stored to be energized.
The contents stored in the program device 10 are stored when there is a change in the loads 33 to 36 connected to the respective outlets 18 to 21 via the receivers 24 to 27, for example, when the load 34 is changed to the first air conditioner in winter. When an electric kotatsu is connected instead, the user can arbitrarily rewrite the priority order, power-on/off cycle, etc. by operating the operating device 9 to set new conditions. In addition, the main controller 7
is provided with a setting section for setting a specified current value based on contract power in advance.

Next, the operation of this embodiment configured as above will be explained. Normally, the switch 3 is closed and current flows from the lead-in line 1 to the load side wiring 4, and the passing current is detected by the detector 2 and A-D.
It is converted into a digital signal by the converter 5 and stored in the memory 6.
is memorized. On the other hand, the main controller 7 periodically gives a command signal to the comparator 13 to determine whether the current value stored in the memory 6 is larger or smaller than the specified current value set in the main controller 7, and then outputs the determination result. It is output to the main controller 7. For example, when the so-called base load power for the septic tank, clock, etc. that is constantly used throughout the year is 300W, and in addition to this, the air conditioner with load 34 is turned on and consumes 1.0KW, as shown in Figure 4 at time A. If the oven of load 33 is energized at the time indicated by and consumes 1.2KW, the total becomes 2.5KW.For example, if the contract power is 2.0KW, the current passing through detector 2 will exceed the specified current value. Therefore, the comparator 13 outputs an output signal indicating that the passing current is large to the main controller 7. Then, the main controller 7 outputs a power-off command signal in a priority order opposite to that set in the program device 10. That is, this signal includes a start bit _D0 followed by a 4-bit receiver selection code _D1 to _D4 ,
The power cutoff command signal is given to the modulator 17 as a digital signal consisting of the off signal _D5 , and is transmitted to the receivers 24 to 27 through the load side wiring 4. That is,
The main controller 7 first transmits a power cut command signal for the load 36, which has the lowest priority, from the transmitter 15, so that the code of the code generator 29 of the receiver 27 matches the receiver selection code. Then, the off signal _D5 is stored in the latch 31 of the receiver 27, and the switch 32 is turned off. At this time, assuming that the refrigerator serving as the load 36 has been out of operation before the switch 32 is turned off, the current passing through the detector 2 hardly decreases. Then, the main controller 7 next controls the load 3.
Since the power cutoff command signal D5 is transmitted from the transmitter 15, the off signal _D5 is stored in the latch 31 of the receiver 26 and the switch 32 is turned off in the same manner as described above.
Therefore, if the air conditioner of the load 35 is also out of operation before the switch 32 is turned off, the passing current will not decrease. Therefore, the main controller 7 next transmits a power cut command signal for the load 34 from the transmitter 15, so the latch 3 of the receiver 25 is activated in the same manner as above.
1, the off signal _D5 is stored and the switch 32 is turned off. Then, the air conditioner of the load 34 that was in operation is turned off, and the power consumption decreases by 1.0KW, and the total power consumption becomes 1.5KW, which is less than the contract power of 2.0KW. And loads 36, 35,
34 from the main controller 7 is sent within an extremely short period of time, the time during which the contracted power is exceeded is extremely short, and therefore the breaker installed by the electric power company is opened during this period. There's nothing to do. Next, when the oven of the load 33 is turned off at the time indicated by time B in FIG. 4, the passing current becomes only the base load of 300W. If 3 minutes or more have elapsed from time A to the time indicated by time B, the main controller 7 transmits an energization command signal for the load 34, so the on signal _D5 is stored in the latch 31 of the receiver 25 and the switch is opened/closed. The device 32 is turned on and the cooler of the load 34 resumes operation. The passing current at this time is the base load.
The total of 300W and 34 loads is 1.3KW, which is the contract power.
Since it is less than 2.0KW, the main controller 7 has a load of 35
The transmitter 15 now transmits the energization command signal for the load 36 and the energization command signal for the load 36, and the receiver 26,
The on signal _D5 is stored in each latch 31 of 27, and the switch 32 is turned on. Next, at the time point C in Figure 4, the microwave oven with load 37 is turned on and consumes 1.2KW, resulting in a total of 2.5KW.
Therefore, the main controller 7 controls the load 3 in the same manner as described above.
6. The transmitter 15 transmits a power cut command signal to the load 35 and then the load 34 in this order, and the air conditioner of the load 34 is turned off. Time D 2 minutes after time C
When the load 37 is cut off at time D, the main controller 7 does not issue an energization signal for the load 34 at time D because three minutes have not elapsed since the air conditioner of the load 34 was cut off at this time. Then, at time E, one minute after time D (three minutes after time C), the main controller 7 transmits an energization command signal for the load 34 from the transmitter 15, so that the air conditioner for the load 34 starts operating. resume. Next, at time F, when the iron of the load 38 is energized and its power consumption is 600W, the total is 1.9KW, which is within the contract power, and the main controller 7 does not operate at all. Next, at time G (more than 10 minutes have passed since time E),
When the air conditioner with load 35 is energized, its power consumption is
If it is 0.8KW, the total power will be 2.6KW, which exceeds the contracted power, but at this time, the air conditioner with load 34 will have 10
The main controller 7 transmits a power-off command signal for the load 34 from the transmitter 15 to turn off the air conditioner of the load 34, and reduces the total power consumption.
The power is 1.6KW. Next, at time H when this state continues for 10 minutes, the main controller 7
Since the transmitter 15 transmits the power-off command signal of No. 5 and the power-on command signal of the load 36, the air conditioner of the load 35 is suspended, and the load 34 resumes its suspension of operation in its place. The various command signals from the main controller 7 described above are executed based on the program stored in the storage device 8 of the program device 10. In addition, even if the switches 32 of the receivers 24 to 27 are all turned off, if the current passing through the detector 2 is equal to or higher than the specified current, the main controller 7 sends the alarm 14
After a predetermined period of time, a command signal is issued to the detector 2 to turn off the switch 2. Next, when the operating device 9 is set to the check state when the door is closed at bedtime, the main controller 7 first turns off the power to turn off the air conditioners of the loads 34 and 35 and the refrigerator of the load 36, which may be turned on at night. A command signal is transmitted from the transmitter 15 to turn off these loads 34, 35, and 36, and the current passing through the detector 2 in this state and the current value stored in the base load memory 12 are calculated. The magnitude is compared by a comparator 13, and when the passing current is larger, an alarm 14 is sounded. That is, when the detector 2 detects a passing current that is greater than the current value stored in the base load memory 12, it can be determined that one of the loads 33, 37, and 38 remains energized only by operating the operating device 9. If the alarm 14 does not sound, all the power is cut off except for the loads 34, 35, and 36, which may be energized at night.
I can confirm that I have not forgotten to cut anything. Then, after completing this confirmation, the main controller 7 controls the loads 34, 35,
The energization command signal is transmitted to the receivers 25, 26, 27 that control the opening and closing of the receivers 25, 2.
Switches 32 6 and 27 are turned on, respectively.

In the above embodiment, the receivers 24 to 27 are interposed between the outlets 18 to 21 and the loads 33 to 36, but as shown in FIG. , the receiver 40
A switch 41, which is controlled on and off by
If the power indicator lamp 45 is connected to the plug 44 side rather than the switch 41 so that when the switch 2 is turned on, the power indicator lamp 45 lights up regardless of whether the switch 41 is on or off, the main controller 7 Even if the manual switch 42 is operated while the switch 41 is turned off by the power cutoff command signal, the operation can be confirmed by the blinking of the power indicator lamp 45.
Unnatural feeling when operating the manual switch 42 can be eliminated.

In this embodiment configured in this way, since the signal from the transmitter 15 is sent in a superimposed manner to the load-side wiring 4, there is no particular need for construction of the communication line, and the program written in the program device 10 is We control the energization and disconnection of loads according to the current situation, and alternately shift the timing of energization of loads with particularly high power consumption to prevent power consumption from exceeding the contracted power, so power usage peaks are less likely to occur and the power consumption is moderate. As the power is distributed, multiple loads can be used efficiently while keeping the contracted power low. In addition, in the above-mentioned embodiment, specific loads 34, 35, and 36 that may be energized at night during a check before going to bed are turned off based on the program set by the program setting device, and the current passing through the drop-in line is turned off. Since the comparator 13 compares the current value with the current value stored in the base load memory 12, it is possible to easily check whether a load other than a specific load has been forgotten to be turned off.

As is clear from the above description, the present invention cuts off the power to the load based on the priority set in advance in the programming device when the passing current passing through the service line exceeds the specified current, and brings the passing current within the specified current range. To provide a household power control device that can prevent power outage by maintaining the power supply at a constant current level, and can also easily check whether you have forgotten to turn off electrical equipment when you go out or check before going to bed.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of the present invention. Figure 1 is a block diagram, Figure 2 is a block diagram showing the configuration of a receiver, and Figure 3 shows input and output signals of a transmitter. FIG. 4 is an explanatory view of the operation, and FIG. 5 is a block diagram showing another embodiment of the present invention. In the drawing, 1 is a lead-in line, 2 is a detector, 4 is load side wiring, 10 is a program device, 13 is a comparator (discrimination device), 15 is a transmitter, 24 to 27 are receivers,
33 to 38 are loads, 39 is an electric device, 40 is a receiver, 43 is a load, and 44 is a power indicator lamp.

Claims (1)

[Scope of Claims] 1. Detects the passing current passing through the drop-in line and determines whether or not this exceeds a specified current during normal times, and at the time of checking, determines whether or not the passing current exceeds a base current that is normally energized. A discriminating device that discriminates, a programming device that can arbitrarily set in advance the priorities for energizing a plurality of loads according to their types, the cycle of energizing and disconnecting, etc. so as to correspond to both normal times and check times, and the above-mentioned discriminating device. A transmitter that transmits a command signal for energizing or de-energizing according to a program of the programming device when the device determines that the passing current exceeds a specified current; A household power control device comprising a receiver for controlling the power. 2. The home power control device according to claim 1, wherein the transmitting device sends a high frequency signal modulated by the command signal to the receiver through the load side wiring. 3. The receiver is provided built into the load, and the power indicator lamp provided in the load is energized regardless of whether or not the load is energized. home power control device.