JPS5951210B2 - Electricity consumption control device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to the total amount of current input or total amount of power input (these are collectively referred to as:
The present invention relates to an electricity consumption control device that automatically limits the total electricity input amount (referred to as the total electricity input amount in this specification) to a predetermined setting value or less.

In recent years, household electricity consumption has continued to increase due to the spread of electrical products and the development of new electrical devices.

Usually, the contracted capacity value between the power supplier and each consumer is set according to each consumer's peak value, and the power supplier side must provide facilities of a scale corresponding to this peak value. Therefore, the peak value is set as low as possible without causing serious inconvenience to consumers, and the ratio of the peak value to the average value is reduced.
Automatically controlling the power so that it does not exceed the set peak value is an effective means for power suppliers to increase equipment operation rates and reduce the chances of power shortages occurring. .

It is also advantageous for consumers to use electricity wisely to lower its peak value and to sign a contract with a lower peak value, as they can save on construction costs and basic electricity charges. A conventional device that automatically controls the total electrical input amount to keep it below the peak value set in the contract is a no-fuse braking force.

The no-fuse braking force turns off the entire wiring when the total electrical input exceeds a set value. Therefore, in this case, it is dark in a normal home at night, and the consumer must find the switch for non-urgent electrical equipment in this darkness, turn it off, and then set the fuse breaker. No. This operation is extremely inconvenient for the consumer, and the consumer must decide how to use the electrical device again after it has been turned off, which is a major drawback of conventional devices. Ta. Although there is a conventional technique disclosed in Japanese Patent Laid-Open No. 51-25746 which solves this conventional disadvantage, it has the disadvantage that the circuit configuration becomes complicated.

The present invention aims to eliminate the above-mentioned drawbacks in the conventional device, and to achieve this purpose, the control device is equipped with a comparator, a memory, a contrast value output device, and a delay device.
When the total electrical input amount exceeds the limit value (actually, the limit value is often set using the contract capacity value), only the specific load is turned off without turning off the entire wiring, and the When the total electrical input amount decreases again, the specific load that has been put into the above-mentioned state is automatically turned on.

The drawings will be explained in more detail below. FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is an operation time chart for explaining the operation of the circuit shown in FIG.

In Fig. 1, 20 represents the indoor wiring on the load side of the integrating wattmeter (two round-trip wires for single-phase, three wires for three-phase are shown as a single line), 1 is a limiter, and 2 is a limiter. Shows branched wiring indoors. The block 5 is a detection device for detecting the total electrical input amount, of which 3 is a current transformer and 4 is a rectifier, and the output DC voltage value of the rectifier 4 is designed to be proportional to the total current input amount 1. It is similarly easy to design the detection device 5 to output a DC voltage value that is proportional to the total amount of power input. Furthermore, although the quantity detected by the current transformer 3 is an analog quantity, the various devices used in the device of this invention and explained below in order may be devices for analog circuits, but they may also be used for digital circuits. Depending on the convenience of design, one part may be equipment for analog circuits and the other part may be equipment for digital circuits. An appropriate AD conversion circuit, DA
It is assumed that a conversion circuit is provided.

Reference numeral 6 denotes a contrast value output device that outputs a contrast value to be compared with the voltage value V, and under normal conditions, it outputs a predetermined contrast value 1 set corresponding to the limit value of the total electrical input amount, and when the overload operation is performed, Sometimes a smaller correction value Vm is output.

7 is a comparison device that calculates the difference between the detection value from the detection device 5 and the comparison value from the comparison value output device 6; 8 is a switch device;
9 is a delay device, 10 is a memory that is controlled by the output of the delay device 9 and stores the detection value from the detection device 4 at that time, and 11 is an electrical load that is controlled on/off by the switch device 8, such as a room air conditioner. be.

Next, the operation of the circuit shown in FIG. 1 will be explained with reference to FIG. 2A shows the detected value output of the detection device 5, FIG. 2B shows the output of the memo 1 and 0, and FIG. 2C shows the operation of the electric load 11 over time T. At time T1, the electric load 11 starts operating, and at time T2, when the detected value output V of the detection device 5 exceeds a predetermined contrast value 1 from the contrast value output device, the comparator 7 outputs an output and turns off the switch device 8. state.

As a result, the total electrical input amount decreases and the output of the detection device 5 decreases to the value of Vm shown in FIG. 2a. On the other hand, the output of the comparison device 7 is delayed for a short time by the delay device 9, and then the memo 1 river 0 is controlled to output the detection value V of the detection device 5 at that time.
Enter m into memory l river 0. This value of Vm indicates the hunting prevention value when turning on the switch device 8 from the OFF state again, and if the output value of the detection device 5 becomes less than this Vm value, even if the switch device 8 is turned on again, the total electrical input amount indicates that the electric equipment 11 can be operated immediately without exceeding the value 11 corresponding to the set value 1. Next, note 1
The output Vm of river 0 is input as new data to the comparison value output device 6. The comparison device 7 compares the detected value output V of the detection device 5 with the new output Vm of the device 6, but V>V.
m, the output of the comparator continues to be generated.

At time T3, when V<m, the output of the comparator 7 disappears, the switch device 8 is turned on again and the operation of the electrical equipment 11 is restarted, and the output of the comparator 7 disappears, triggering. The memory 10 is then reset.

Moreover, rather than inputting the output Vm of the memory 10 itself to the device 6, Vm is multiplied by an appropriate value of 1 or less, for example, 0.
．． It is more effective to prevent hunting by inputting 8Vm, or a value obtained by subtracting a certain value from Vm, for example, Vm - Vk, to the numerical value setting device 6.
It is also easy to provide a data processing circuit for this purpose between the input side of the device and the input side of the device.

In this case, the numerical value input to the device 6 is generally referred to as a numerical value that is related to the output value of the memory and does not exceed the output value of the memory, and its maximum value is the output value of the memory 10 itself.
Even if the input capacity of the electrical load 11 changes due to the above operation,
Furthermore, even if other electrical devices with different input capacities (for example, electric heaters, etc.) act as a load, the total amount of electrical input can always be kept within a predetermined value.

As is clear from the above, the device of the present invention can automatically maintain the total amount of electricity input below a set value with a simple circuit configuration and without causing much inconvenience to electricity consumers. It is also possible to improve the reliability of the entire device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
The figure is an operation time chart for explaining the operation of the circuit of FIG. 1. In the figure, 1 is a limiter, 2 is wiring, 5 is a detection device, and 6
is a comparison value output device, 7 is a comparison device, 8 is a switch device,
10 is a memory, and 11 is an electrical load.

Claims (1)

[Scope of Claims] 1. A detection device that outputs a detected value according to the total electrical input amount of wiring, a contrast value output device that outputs a comparison value that is compared to the upper air detection value, and a comparison value output device that outputs a comparison value that is compared to the upper air detection value. A comparison device that compares and generates a comparison output, a switch device that disconnects a part of the load connected to the wiring when the total electrical input amount exceeds a limit value based on the comparison output, and this switch device comprises a correction control circuit that causes the comparison value output device to output a correction value smaller than the comparison value before the operation when the correction control circuit operates, the correction control circuit has a memory circuit, and the memory circuit The detected value after separation is stored in memory, and the comparison value output device outputs a corrected value based on the output of this memory circuit, and also outputs a correction value when the detected value becomes smaller than a value in relation to the corrected value. An electricity consumption control device that connects the load to the wiring again. 2. The electricity consumption control device according to claim 1, wherein the comparison value output device is configured to receive an input smaller than the output of the memory circuit and output a corrected value based on the input. . 3. The electricity consumption control device according to claim 1, wherein the memory circuit is configured to be reset when the load is connected to the wiring again.