JPH08306449A - Electric outlet with monitor - Google Patents

Abstract

PURPOSE: To give warning at the time of an overload and prevent an accident from happening by providing a control device within an electrical receptacle and by connecting a display device and an overload alarm circuit to a program established in this control device. CONSTITUTION: A direct current power source, into which an alternating power source from the exterior is converted via a transformer 211 and a bridge rectifying circuit 212, is inputted into a switch circuit 22 and a CPU unit 25. A temperature of a plug-in part 11, when sensed by a temperature transducer 221, is amplified, sent to the switch circuit 22 connoted with a conversion circuit 23 and with an A-D converter 24 and placed in comparison, and inputted into the CPU unit 25. The CPU unit 25, in whose own program conditions such as current, voltage, and the like of various kinds of works are established, displays the then voltage and current on a display device 26 if the conditions of voltage, current, and the like sensed by various transducers exceed established values and along with this, causes an overload circuit 27 to generate predetermined alarm display and alarm sound. An electrical receptacle fitted with a monitor in which safety for use is enhanced is thereby obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric outlet with a monitor, and more particularly to an electric outlet with a monitor having improved safety in use.

[0002]

2. Description of the Related Art In recent years, personal consumption has greatly improved due to high economic growth, and the lifestyle has entered the era of electrification.
A large amount of electric products and equipment are used throughout society in response to demands such as life or production. There is no doubt that these large amounts of electrical products and equipment will improve the quality of life and production efficiency, but when operating and using them, there is often a lack of common sense of electricity. Is invited. Among the causes of this unexpected disaster, "electric wire ignition" is often cited, and when the cause of the occurrence is investigated and analyzed, it can be roughly divided into the following two types.

1. The wires have been used for too long and are aging;
By the way, a general electric wire is formed by forming a single wire by covering a conductor made of a predetermined material, for example, a copper wire with a first insulating layer molded of plastic or rubber, and then forming two or more wires. The single wires are bundled and covered with a relatively thick second insulating layer, and the wire diameter of the conductor and the thickness of the first and second insulating layers covering the outer peripheral portion are respectively changed according to the demand for use. Build appropriately.
For example, when used for transmitting a large current or a high voltage, the wire diameter of the conductor and the thickness of the first and second insulating layers are relatively high at a working temperature because a large current flowing through the conductor causes a high temperature. Since it is necessary to withstand the above, an affordable electric wire having a relatively large wire diameter and a thick insulating layer is used. On the contrary, when used for wiring of general household or electric circuit board, the working temperature is relatively low because the current or voltage to be transmitted is relatively small, and the wire diameter of the conductor and the first and second insulation The layer thickness need not be large. Therefore, when an electric wire is shipped from a factory, its wire diameter, withstand voltage and current are normally displayed, so that the user can select and use an electric wire of an appropriate standard. And since the first and second insulating layers coated on the outer peripheral portion are made of plastic or rubber material,
After a certain period of time after normal use, the coating layer naturally ages, insulation becomes defective, and the electric wire is short-circuited, and the risk of "electric wire ignition" easily occurs.

Two. Overuse is liable to occur due to improper use; as can be seen from the above description, when shipping ordinary electric wires, the durable current and voltage during use are displayed, and the electrical outlet connected to the electric wire also shows the operating current during use and Although the voltage etc. is displayed, when using an extension wire formed of such electric wires, it is often so called octopus wiring to attach several electric sockets without being able to use only one electric outlet. There is. In many cases, the user neglects to pay attention to the withstand current and voltage displayed on the electric socket and immediately inserts the power plug into the electric socket without hesitation when using the electric product. If the electric appliances with low demand current are used at the same time, the diameter of the power supply line or extension wire may still be able to withstand the load, but if the electric appliances with large demand current are used at the same time, Since a large amount of current must be supplied, the electric wire overloads and the momentum of the temperature rises.If it is light, the fuse of the electric product may be blown, but when it is terrible, the power line will ignite and valuable human life and property will be lost. Could result in a disaster that loses energy.

[0005]

SUMMARY OF THE INVENTION In view of the problems of the above-mentioned conventional electric tools such as electric wires, electric outlets or extension wires, the present invention provides an electric outlet with a monitor which is convenient and safe to use. With the goal.

[0006]

In order to achieve the above object, the present invention has a box-like shape having one or more insertion portions on the face plate surface and an appropriate number of control buttons, and a storage space inside. A socket seat, a set of control circuits provided in the storage space and having an input circuit for inputting an external power source, a temperature converter connected to the input side, and a conversion circuit connected to the output side. A switch circuit, the conversion circuit in which the switch circuit is connected to the input side and the A-D converter is connected to the output side, an AD converter for sending a digital signal to the CPU unit, and a preset software program Is stored,
A CPU in which a predetermined value such as operating voltage, operating current, work rate or ambient temperature is set and a RAM capable of changing the predetermined value is installed, and a display and an overload warning circuit are connected to the output side of the CPU It has a combined structure of units, and the above-mentioned display displays the operating voltage, operating current, power rate, ambient temperature, etc. of the power source in use, and these operating voltage, operating current, power rate, ambient temperature, etc. are set to a predetermined value. When the value is exceeded, the internal program is configured to output a drive signal to issue a warning via the overload warning circuit.

A function selecting button, a function setting button, a high numerical value adjusting button and a low numerical value adjusting button are provided outside the CPU unit, and the operating voltage, operating current, and It is even more preferable if the set value such as the work rate or the ambient temperature can be adjusted and changed.

[0008]

The present invention constructed as described above comprises a control circuit having an input circuit, a switch circuit, a conversion circuit, an AD converter, and a CPU unit connected with an indicator and an overload warning circuit. Since the input circuit converts an external AC power source into a DC power source, the switch circuit and the CPU
Let the unit enter. The switch circuit has an input side connected with a temperature converter for sensing and expanding the temperature of the socket, an output side connected with a conversion circuit and an AD converter, and when receiving a signal from the temperature converter, the CPU Enter into the unit. Since the CPU unit is connected with an indicator and an overload warning circuit on the output side, when an electric tool inserted in the insertion portion is overloaded, the CPU unit causes its own program to write each work current or voltage. Since the predetermined values such as the power and the ambient temperature have already been set, the control signals are input to the CPU unit if the detected conditions such as voltage, current and temperature are exceeded in comparison with the set values. The voltage or current at this time can be displayed on the display unit, and at the same time, a predetermined warning display light or warning sound can be emitted to the overload warning circuit.

The CPU unit operates the ROM for storing various condition data set on the input side by a fixed program method that cannot be rewritten, and the function selection buttons, function setting buttons and adjustment buttons. Since a RAM that can adjust the condition data is provided, when you replace the electric equipment with the condition different from the previous one, the already set various condition data are changed and adjusted within the allowable operating condition of the socket seat and the electric wire, that is, the range of the rated load. can do.

The above and other objects, features and advantages of the present invention will become more apparent from the detailed description of the embodiments below with reference to the drawings.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, an electric outlet with a monitor according to the present invention mainly has a face plate 12 of its socket seat 1 provided with one or more inserting portions 11, and in this embodiment, one socket seat 1 is provided. It has three plugs 11 (having the same structure as a conventional electrical outlet). The socket seat 1 forms a storage space (not shown) therein, and at the same time, a face plate 12 is provided with a fuse set 13, an indicator 26 and four control buttons 31, 32, 33 and 34.

As shown in FIGS. 2 and 3, a set of control circuits 2 is installed in the internal storage space of the socket seat 1. The control circuit 2 includes an input circuit 21 and a switch circuit 2
2. The conversion circuit 23, the AD converter 24 (analog-digital converter), the CPU unit 25 (central processing unit), the display 26, and the overload warning circuit 27 are included in the electric circuit.

The conversion circuit 23 converts an AC signal into a DC signal (AC / DC), and has a voltage and current attenuating circuit provided therein, and the output of the conversion circuit 23 is only mV or mA. Two pins of the switch circuit 22 (see FIG.
See).

The operating principle of the control circuit 2 is as follows. That is, the input circuit 21 passes the AC power from the outside through the transformer 211 and the bridge rectifier circuit 212 to convert it into the DC power, and then inputs it to the switch circuit 22 and the CPU unit 25 on the output side. In the embodiment, the switch circuit 22 is a CD4052 IC (4 channel Multipl
It is most suitable to use an exor / Demultiplexor). The temperature converter 221 is connected to the outside of the switch circuit 22. The temperature converter 221 expands the sensed temperature of the insertion portion 11 and sends it to the switch circuit 22 for comparison, and the switch circuit 22 connects the converter circuit 23 and the AD converter 24 to the output side. When the signal from the temperature converter 221 is received, it is input to the CPU unit 25. The CPU unit 25 connects an indicator 26 and an overload warning circuit 27 to the output side, and
When the electric device inserted in 1 is overloaded, the CPU
Since the unit 25 is a microprocessor and various conditions such as current and voltage for various operations have already been set in its own program, various conditions such as voltage, current and temperature detected by various converters are set. When the value is exceeded, the signal is input to the CPU unit 25 for comparison, and at this time, the control signal is input to the CPU unit 25 to cause the display 26 to display the voltage or current at this time. The overload warning circuit 27 emits a predetermined warning display light and a warning sound. In this embodiment, a buzzer is provided.

Next, as shown in FIG. 4, the CPU unit 25 is a specially designed programming IC, and the pin arrangement and the function of each pin are substantially as shown in the drawing.

That is, the central portion is the CPU 251 (central processing unit), the 1st to 24th pins are the input / output end address 252 (abbreviated as I / O Bus), and the 26th to 36th.
Is a function selection pin 253. Then, FIGS.
With reference also to the above, the 26th to 36th pins of this embodiment are connected to the buttons, respectively, and the 26th pin of them is the function selection button 31. The voltage, current, power, or temperature value is displayed on. The 27th pin is a function setting button 32, which can set the voltage, current, power or temperature value to be controlled. At the time of setting, the numerical value increasing adjustment or the high numerical value adjusting button 33 of the 28th pin is set. It is necessary to place a numerical down adjustment on the low numerical adjustment button 34 on the 29 pin, which completes the setting.

By the way, when the present embodiment is shipped from the factory, various control conditions are already set. If it is desired to change the set conditions, the limit of the allowable service standard of the socket seat 1 and the electric wire is set. Therefore, the adjustment setting can be made only within the set range of the predetermined numerical value, and if it is out of the range of the predetermined numerical value, the adjustment is completely invalidated. The 41-6
Pin 4 is an analog-to-digital converter, abbreviated to A /
CONVERTER 254 and data address, abbreviation DATE
BUS255, each analog signal is first converted into a digital signal and then sent to the CPU 251 via the DATA BUS 255. The 65th to 79th pins are a data lock, an abbreviation DATA LATCH 256 and a liquid crystal driver, an abbreviation LCD DRIVE 257. After each received control signal is processed by the CPU 251, the data is locked first and then the LCD DRIVE 257. After driving, the display 26 displays various working conditions. Further, the source memory (SOURSE
MEMORY), abbreviated ROM 258 and variable memory, abbreviated R
An AM 259 is provided, and one of the two memories stores the condition data that has already been set by a fixed program method that cannot be renewed, and the other stores the function selection button 31, the function setting button 32, and the adjustment buttons 33, 34. The various conditions controlled by the adjustment of are changed.

As is apparent from FIG. 3, in the control circuit, the temperature is directly detected by the temperature converter 221 and input to the switch circuit 22.

The voltage is converted directly from the input terminal to the conversion circuit 23.
Is transmitted to the second pin of the CPU, converted into AC and attenuated, input to the switch circuit 22 through the two pins, and further transmitted from the pin between these pins into the CPU unit 25.

Further, the current is inputted from the input end to the fuse set 13 and further from the resistor to one pin of the switch circuit 22, and thereafter, the CO of the first set of the switch circuit is set.
It is output to the first pin of the conversion circuit 23 by MMON. That is, this senses the current through the potential difference across the resistor.

The work rate is determined from the magnitudes of voltage and current obtained by an arithmetic program inside the CPU unit 25. That is, W = V × I (watt = voltage × current) Therefore, the voltage and current control the switch circuit 22 by the CPU unit 25 to switch the switch, and the input signal is passed through the switch circuit 22 to the conversion circuit 23. The CPU unit 25 sends and switches the signal, and the CPU unit 25 processes the received signal and supplies the processed signal.

When the present embodiment is used, a power source is connected to the inserting portion 11 to fix the socket seat 1 to a wall surface, and a wire plug of an electric appliance to be used is inserted into the inserting portion 11. Alternatively, as shown in FIG. 5, this embodiment may be formed as an extended type. At this time, the indicator 26 on the face plate 12 of the socket seat 1 displays the current operating voltage of the electric appliance currently used, and if it is desired to know the operating current, power rate, and ambient temperature of the electric appliance used, the function selection button is pressed. It suffices to press 31 and the function selection button 3
Each time you press 1, one condition is displayed. Also, if you want to change the set value, you can set the various conditions by the software program of the internal microprocessor, and if the voltage, current, power and temperature of the electric appliance used exceed the set value, Care is taken by the program to send a signal to the overload warning circuit 27 to activate it and to give a predetermined warning sound to the user to take appropriate action. Of course, when the power source becomes overloaded, the fuse 13 in the control circuit 2 and the fuse-free disconnection means in the power supply system in the home or factory are double-guaranteed, so that the electric wire ignition or the equipment caused by the overload warning circuit is triggered. It is possible to avoid destruction of equipment.

[0023]

According to the present invention constructed as described above, there is no indication or warning even if the conventional electric socket or the electric wire is already overloaded, and the user who is poor in general electric use common sense is careless. Or, since ignorance easily causes a risk of electric wire ignition, leading to loss of human life and property, a control circuit is installed inside an electrical outlet, and a program set in the control circuit includes a display and an overload warning circuit. Since it is connected to the power outlet, it is a highly safe electrical outlet that warns the user to take necessary measures when overloaded and avoids developing into a disaster.

[Brief description of drawings]

FIG. 1 is an appearance display diagram of a relatively preferred embodiment of the present invention.

FIG. 2 is a block diagram of an electric circuit of the above embodiment.

FIG. 3 is an electric circuit diagram of the above embodiment.

FIG. 4 is a control circuit display diagram of the above embodiment.

FIG. 5 is an external view display diagram of another embodiment.

[Explanation of symbols]

 1 socket seat 11 insertion part 2 control circuit 12 face plate 21 input circuit 22 switch circuit 221 temperature converter 23 conversion circuit 24 A-D converter 25 CPU unit 258 ROM 259 RAM 26 indicator 27 overload warning circuit

Claims (2)

[Claims] 1. A box-shaped socket seat having one or more insertion parts and an appropriate number of control buttons on the surface of a face plate, and a storage space inside, and a box-shaped socket seat installed in the storage space and externally. A set of control circuits with an input circuit for inputting the power source of the power supply, a switch circuit with a temperature converter connected to the input side and a conversion circuit connected to the output side, and the switch circuit connected to the input side to output The conversion circuit in which an A-D converter is connected to the side, and the A-D that sends a digital signal to the CPU unit
A converter, a preset software program are stored therein, a ROM in which a predetermined value such as an operating voltage, an operating current, a work rate or an ambient temperature is set, and a RAM in which each of the predetermined values can be changed are installed, and It has a combination structure of a display unit and a CPU unit connected to an overload warning circuit on the output side.
When the operating voltage, operating current, power, ambient temperature, etc., exceeds the specified value, the internal program outputs a drive signal and warns via the overload warning circuit. An electrical outlet with a monitor, which is configured to emit. 2. A function selecting button, a function setting button, a high numerical value adjusting button and a low numerical value adjusting button are provided outside the CPU unit, and the operating voltage, the operating current, and the work are within the allowable work standard of the socket and the electric wire. The electric outlet with a monitor according to claim 1, wherein a set value such as a rate or an ambient temperature can be adjusted and changed.