JPH11341707A - Remote automatic power supply switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control the setting of the upper limit value of the specified current of each household, by giving a code for recognizing the relationship between a control device to which electric appliances of higher priority and a controlled device to which electric appliances of lower priority, and then controlling an output to the controlled electric appliance depending on the condition of a load current of the control electric appliance. SOLUTION: A control appliance A and controlled appliance B, C are placed in an AC electric path having an upper limit of the current value to be used, a plurality of receptacles a, b, c and electric appliances 2a, 2b, 2c are connected in parallel and the control appliance A and controlled appliances B, C are provided between the receptacles a, b, c and electric appliances 2a, 2b, 2c. A code for recognizing relationship is given to the control appliance A connected with the electric appliance 2a of higher priority and controlled appliance B, C connected with the electric appliances 2b, 2c of lower priority. While a load current higher than the preset value is applied to the electric appliance 2a, it is detected by a current detecting means of the control appliance A in order to control an output to the electric appliances 2b, 2c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a case where a plurality of electric appliances are connected in an alternating current circuit having an upper limit of the operating current value, and when the electric appliances are used at the same time, the upper limit of the operating current value is exceeded. The present invention relates to an automatic power switching device that stops input to low-priority electrical appliances that do not need to be used simultaneously.

[0002]

2. Description of the Related Art In an AC power line such as in a home, an upper limit of a current value used is set by a breaker. These days,
Although the power saving per electric appliance is progressing, the electric current value used in the home tends to increase with the increase of home electric appliances such as computers. The upper limit of the current used is set for each household by an agreement with the power company, but if this value is increased, the basic electricity rate is increased. Therefore, it is easy to set a low current setting value.
There is an inconvenience that a current stop occurs due to an overcurrent. The suspension of power reception due to the operation of the breaker has a problem in that information input to a personal computer, a word processor, or the like is lost. On the other hand, a technique of putting a high-frequency signal in an AC electric circuit is applied to various devices and is known. However, if the simultaneous use of electric appliances exceeds the upper limit of the operating current value, a signal is placed in the AC circuit to stop the input to low-priority appliances that do not need to be used simultaneously. There is no automatic power switchgear that prevents the overcurrent from flowing in the AC circuit by receiving the signal from the slave unit.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to set an upper limit of the current to be used in each home by agreement with a power company. Turn off input to lower priority devices among devices that are being used at the same time, maintain input to higher priority devices, and lower total home settings. Keep basic electricity rates low. PCs without current stop due to overcurrent,
The information that you input into a word processor etc. will not be lost. In a case where a plurality of electric appliances are connected in an AC circuit having an upper limit of a use current value, when the use of the electric appliances simultaneously exceeds the upper limit of the use current value,
For example, stopping input to a low-priority appliance that does not need to be used simultaneously.

[0004]

In order to solve the above-mentioned problems, the present invention has the following constitution. That is, this device
It has a parent device and a child device, and the parent device and the child device exist independently or coexist in one device, and the parent device has an input terminal,
An output terminal, a current detection unit, a starting current setting unit, an encryption setting unit, a DC power supply unit, a control unit, and a transmission unit are included. The slave unit includes an input terminal, a switching unit, an output terminal, an encryption setting unit, and a DC power supply unit. , Control means and receiving means, the parent device and the child device are placed in an AC circuit having an upper limit on the current value used, and a plurality of outlets and electric appliances are connected in parallel in the circuit. The parent device and the child device are installed between the outlet and the appliance, and the parent device that connects the high-priority appliance and the child device that connects the low-priority appliance have a code that recognizes the parent-child relationship with each other. While a load current of a predetermined value or more is used for the electric appliance connected to the master unit, the current is detected by the current detection means of the master unit, and the electric device connected to the slave unit is detected. In order to stop the output to the device, The modulation and transmission means, passing a signal for controlling the path, receive the signals to the receiving means of the slave unit, a remote power switching device for opening and closing the output of the slave unit by opening and closing means of the child unit.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a plurality of independent sets of parent and child are provided on the same electric circuit by giving a code which recognizes a high priority electrical appliance and a low priority electrical appliance as a parent-child relationship with each other. Distribute. As the encryption, for example, known means such as a number selector can be used. For example, if the address is one digit in decimal, the parent is set to 5 and the child is set to 5. In the case of decimal four digits, for example, the parent 1021,
The child 1021. In the present invention, a number of about four decimal digits is sufficient and practical, but is not limited to this.

[0006] Similarly, priorities can be set by assigning ciphers that recognize a parent-child relationship to a plurality of children. Exchange of parent and child is also possible with simple operation. Further, the parent device and the child device may be combined to form one device, and the parent device and the child device may be configured to have different encryptions in the device.

Next, in the present invention, as a signal transmission method from the transmission means of the parent device, a method of continuously outputting a signal to the reception device of the child device at a fixed time interval, and a stop signal to the child device are set to 1
Either one-time or multiple-time delivery may be employed. A high frequency signal can be used as the signal, but the signal is not limited to this. It is also possible to provide a modulating means on the transmitting side and a demodulating means on the receiving side.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings, but these are merely examples for describing the present invention, and do not limit the scope of the present invention. FIG. 1 is a block diagram of a parent device in an apparatus according to an embodiment of the present invention. The parent device according to the present invention has an input terminal, an output terminal, a current detection unit, a starting power setting unit, an address code setting unit, a DC power supply unit,
It comprises control means and transmission means to the AC power path. The transmission used a modulation scheme. The specifications of the parent device are as follows. Input voltage 100V 50 / 60Hz Load capacity 1500VA Starting current 5A Carrier 100kHz 50mW

FIG. 2 is a block diagram of a slave unit in the apparatus according to the embodiment of the present invention. The slave according to the present invention includes an input terminal, an output terminal, an address code setting unit, a DC power supply unit, a control unit, and a receiving unit. The use of slaves is as follows. Input voltage 100V 50 / 60Hz Load capacity 1500VA

FIG. 3 is an electric circuit diagram of one embodiment of the present invention. a, b, and c are outlets arranged in the electric circuit,
Is the parent device, and B and C are the child devices. And
2a is a first-priority appliance, and 2b and 2c are low-priority appliances that may be erased when using the appliance 2a.

The operation of the present power switchgear having the above configuration is as follows. Method example 1 Continuous signal method (1) In FIG. 1, the starting current value is set to 5 A in advance. The address of the parent device is set to 1021 in advance by the address code setting means of the parent device. (2) The current detecting means of the parent device detects a current of 5 A or more. (3) The output modulation / transmission means of the master unit keeps outputting signals at fixed time intervals. (4) The signal travels along the AC 100 V circuit in FIG. 3, passes through the outlet (b) of the slave unit (B) in FIG. 2, passes through the input means, and is received by the receiving means. The slave unit's address code is
The address of the slave unit is set in advance by the address code setting means.
021. (5) Electric appliance (b ") by means of relay opening / closing of the slave unit
Stops while receiving the output to the at regular time intervals.

System example 2 Set / reset system (3) A stop command signal to a slave unit is transmitted once or plural times. (5) Upon receipt of a stop command signal, output is stopped. (6) Send the restart command signal to the slave unit one or more times. (7) Receive (6) and restart.

FIG. 4 is a design example of the address of the parent-child device. The master sets the starting current value in two stages of (1) 5A and (2) 8A, and the slave B1 operates at (1) or (2).
2 is designed to operate only with (2), the address of the parent device is, for example, 1500, the child device B1 is 1501, and the child device B is
2 to 1502.

Similarly, in FIG. 4A, A is B1, B
It works by prioritizing 2. In FIG. 4B, A
Acts on B1 and B2 simultaneously. In FIG. 4C, A
1 or A2 acts on B. In FIG. 4D, A1 or A2 acts on B. In FIG. 4 (e), A1 is B
A2 acts on B2 and A3 acts on B3.

As described above, according to the present invention, when a plurality of electric appliances are connected in an AC power line of a home or the like having an upper limit of the electric current value, when the electric appliances are used at the same time, the electric current value of the electric current is reduced. In the case where the upper limit is exceeded, the input to the low-priority electrical appliances that do not need to be used simultaneously can be stopped, so that the following effects are obtained. That is, it is possible to suppress the set value for which the upper limit of the current used is set by agreement with the power company for each household. Further, it is possible to cut off the input to the device with the lower priority among the devices being used at the same time, and maintain the input to the device with the higher priority. Priorities can also be set by assigning a code (address code) recognized as a parent-child relationship between a plurality of slaves. Exchange of parent and child is also possible with simple operation. Then, the total home setting value can be reduced.
As a result, the basic electricity charge from the power company can be kept low. In addition, information input to a personal computer, a word processor, or the like does not disappear without a current stop due to an overcurrent.

[Brief description of the drawings]

FIG. 1 is a block diagram of a parent device according to an embodiment of the present invention.

FIG. 2 is a block diagram of a slave unit according to an embodiment of the present invention.

FIG. 3 is an electric circuit diagram of one embodiment of the present invention.

FIG. 4 is a design example of an address code according to an embodiment of the present invention;

[Explanation of symbols]

a, b, c outlets A, A1, A2, A3 Master unit B, B1, B2, B3, C1, C2, C3 Slave unit 2a Priority even if it is turned off when using the first electric appliance 2b, 2c 2a Good electric appliances P, Q Starting current setting value when two-stage setting

Claims (2)

[Claims] 1. A master device and a slave device, wherein the master device and the slave device exist independently or coexist in one device, and the master device has an input terminal, an output terminal, and current detecting means. , Starting current setting means, encryption setting means, DC power supply means, control means and transmission means, and the slave unit has an input end, an opening and closing means, an output end,
It includes an encryption setting means, a DC power supply means, a control means, and a receiving means, wherein the parent device and the child device are placed in an AC circuit having an upper limit of a used current value, and a plurality of outlets and electric appliances are provided in the circuit. Are connected in parallel, the parent device and the child device are installed between the outlet and the appliance, and the parent device that connects the high-priority appliance and the child device that connects the low-priority appliance. Are attached to each other, and while a load current equal to or more than a predetermined set value is used for an electric appliance connected to the parent device, the current is detected by the current detection means of the parent device, and the child is detected. In order to stop the output to the electric appliance connected to the device, by the control means and the transmission means of the parent device, a control signal is sent to the electric circuit, and the reception device of the child device receives the signal,
A remote power switchgear, characterized in that the slave unit output is opened and closed by a slave unit opening / closing means. 2. The apparatus according to claim 1, wherein a method of transmitting a signal from the transmitting means of the master unit is a method of continuously outputting a signal to the receiving unit of the slave unit at a fixed time interval, and a method of transmitting a stop signal to the slave unit by one. 2. The remote power switching device according to claim 1, wherein any one of a plurality of times or a plurality of times is transmitted.