JPH04179079A - Socket box with power monitor - Google Patents

Abstract

PURPOSE:To display the current total power consumption at a socket box at hand, to which a socket is inserted actually, by furnishing a display device for display of the voltage, current, and power in a single piece structure. CONSTITUTION:A current sensing circuit 14 is connected with an AC input line 5, and there also is connected a voltage sensing circuit 15 to sense the voltage impressed, and these two circuits 14, 15 are connected with a phase difference sensing circuit 16 and a calculating circuit 17. The circuit 16 determines the phase difference between the current and voltage, the result being fed to the circuit 17, which calculates the phase difference, voltage, and current and determines the effective power. The result from calculating is passed through an output circuit 18 and displayed on a display device 9. As the power consumption is indicated in this manner, excessive drawout of the power due to so-called octopus feet wiring can be prevented.

Description

[Detailed description of the invention] [Industrial application] The present invention is applicable to a console box for table taps, etc.
Alternatively, the present invention relates to a console box with a power monitor that can monitor the total amount of power used when a plurality of electrical devices are connected.

[Conventional technology]

Conventionally, devices equipped with light emitting elements such as light emitting diodes and neon tubes have been used to monitor the energization state of power strips (for example, Utility Model Application No. 56-124977, Utility Model Application No. 6)
0-168279, Utility Model Publication No. 61-36973),
An ammeter that is integrally attached to a conset (for example,
Utility Model Application No. 57-16187).

[Problem to be solved by the invention]

However, the above-mentioned conventional example merely indicates the energization state by whether or not the indicator lamp is lit, and does not indicate how much power is actually being used. Also,
Some devices were equipped with an ammeter, but those that only displayed the current did not indicate the active power and were not very effective.

By the way, in a console box equipped with a plurality of output consoles, such as a table tap, wiring is likely to be complicated, and there is still a considerable risk of heat generation and ignition accidents due to overload. This cannot be effectively prevented by simply displaying only the energized state as described above. Therefore, especially for people with little knowledge of electricity, it would be safer if some kind of warning means was installed in the console box.

Therefore, the present invention has been made to solve this problem.The present invention is designed to display the current total power consumption on the console box where the console is actually inserted, and to display the current total amount of electricity used when the power consumption exceeds a certain level. The object of the present invention is to provide a console box with a power monitor that issues a visual and audible alarm when the power is turned off.

[Means to solve the problem]

In order to achieve the above object, the present invention integrally includes a display device that displays voltage, current, and power.

That is, in a conset box equipped with one or more AC output consets connected to an AC input line and distributing the same, thereinside a conset box connected to the AC input line,
A voltage detection circuit detects the AC voltage applied here, a current detection circuit connects to the AC input line and detects the AC current flowing here, and a phase difference circuit detects the phase difference between the detected voltage and the detected current. The present invention is characterized by comprising: a detection circuit; a settlement circuit that calculates AC power from the detected voltage, the detected current, and the detected phase difference; and display means that displays information from the calculation circuit.

Moreover, such a conset box with a power monitor may further include an alarm means for issuing an alarm.

〔Example〕

Next, an example of a specific implementation of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an overall diagram of a power strip to which a power monitor of the present invention is integrally added, and FIG. 2 is a block diagram showing its circuit configuration.

Reference numeral 1 denotes a table tap in the shape of a fishing rod, and on its upper surface, insertion ports 3, 3, . . . for a plurality of AC output consets 2 are formed. An AC input line 5 is connected to the side end 4 in the longitudinal direction of the power strip 1, and a plug 6 connected to an AC power source (not shown) is attached to the tip thereof.

Next, a display window 8 is formed on the upper surface of the other longitudinal end 7 of the table tap 1, and is configured to display information from a display device 9, which will be described later. This display device 9
For example, a digital display based on known liquid crystal technology is used.

Further, a slit window 11 is formed in the side end 7 for issuing an alarm from an alarm means 10, which will be described later, and a changeover switch 13 of a mode switching means 12, which will be described later, is provided near the side end 7.
They are arranged in a convex manner from a concave position. Note that the warning means 10 is not limited to a sound such as a buzzer, but may also be a flashing display of a lamp.

The table tap 1 of this embodiment has the external configuration described above, and its internal circuit configuration is as follows.

A plurality of AC input consoles 2.2, . . . are connected in parallel to the AC input line 5 connected to the plug 6. A current detection circuit 14 that detects the current flowing through the AC input line 5 is connected to the AC input line 5, and a voltage detection circuit 15 that detects the applied voltage is also connected to the AC input line 5.

The current detection circuit 14 and voltage detection circuit 15 are connected to a phase difference detection circuit 16 and an arithmetic circuit 17. The phase difference detection circuit 16 determines the phase difference between current and voltage and supplies it to the arithmetic circuit 17, which calculates the phase difference (C).
), voltage (V), and current (1) (P=Vx I
x C05e) L,, the active power (P) is calculated.

The calculation result is displayed on the display device 9 via the output circuit 18. The display device 9 is configured to display various information such as voltage, current, active power, reactive power, apparent power, etc. by a mode switching means 12.

Further, an alarm means 10 is also connected to the output circuit 18, and is configured to issue an alarm with a bell, buzzer, etc. when the total power consumption of the console exceeds a certain limit.

Furthermore, 19 is a button button (abbreviated as rPBJ) input device, which is a device for presetting conditions such as power unit price, usable time, usage time, and allowable total power amount using PB. By displaying various conditions on the display device, the device of the present invention can be used more effectively.

Although the above embodiment describes the case where the present invention is applied to a table tap, the present invention is not limited to this and can be applied to the wall of a house,
It can also be applied to a console box installed recessed in the floor, etc. Furthermore, it can also be applied to a so-called cord reel, which is used at construction sites and the like, in which a cord cable is wound around a drum.

〔Effect of the invention〕

Since the present invention is configured as described above, it has the following effects.

Since the amount of power used is displayed, excessive usage due to so-called octopus wiring can be prevented. Since an alarm device is also added, there is an advantage that even a person without electrical knowledge can easily make a judgment.

[Brief explanation of drawings]

FIG. 1 is an overall diagram of a power strip to which a power monitor of the present invention is integrally added, and FIG. 2 is a block diagram showing its circuit configuration. 1...Table tap 2...AC output conset 5
... AC input line 6 ... Plug 9 ...
Display device 10... Alarm means 12... Mode switching means 13... Changeover switch 14... Current detection circuit 15... Voltage detection circuit 16... Phase difference detection circuit 17... Arithmetic circuit 18 ...Output circuit patent applicant: Noboru Suzuki

Claims (1)

[Claims] 1. A conset box with a power monitor, characterized in that it is integrally equipped with a display device (9) that displays voltage, current, and power. 2. In a conset box (1) equipped with one or more AC output consets (2) connected to the AC input line (5) and distributing it, A voltage detection circuit (1
5), a current detection circuit (14) that is connected to the AC input line (5) and detects the flowing AC current, a phase difference detection circuit (16) that detects the phase difference between the detected voltage and the detected current, and the A computer with a power monitor, comprising: an arithmetic circuit (17) that calculates AC power from a detected voltage, a detected current, and a detected phase difference; and a display means (9) that displays information from the arithmetic circuit. set box. 3. Claim 1, comprising an alarm means (10) for issuing an alarm;
Or a conset box with a power monitor described in 2.