JPH10300790A - Plug receptacle indicating electric rate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To indicate the electric rate of individual electric apparatus by providing a microcomputer for calculating the mean values of current and voltage and multiplying the mean values by an electric rate conversion factor determining the unit conversion rate of a power company thereby calculating power consumption in terms of electric rate. SOLUTION: An electric plug 2 is connected with a 100 V receptacle 1 in home and the electric plug 4 of an electric apparatus to be used or measured is connected with a receptacle 3. When power is turned on for an electric apparatus connected with the receptacle 3, a current flows from the 100 V receptacle 1 through the electric plug 2, the receptacle 3, and the electric plug 4 to the electric apparatus. A metering current sensor 6 performs conversion to a current value and a metering voltage sensor 7 performs conversion to a voltage value. Rectified waveforms of the current value and the voltage value are then averaged by an averaging circuit 9 through a full-wave rectifier circuit 8. A microcomputer, 10 integrates the average current value and the average voltage value constantly, converts the integrated value into power consumption per time and multiplies the power consumption by a factor previously inputted to the microcomputer 10 thus calculating the integrated electric rate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple plug outlet which is inserted into a household electric appliance or a passage of a commercial power supply and which displays an electricity bill.

[0002]

2. Description of the Related Art Conventionally, when a general user calculates an electric power rate of an individual electric appliance, the electric power consumption is calculated by measuring a current and a voltage with a tester, and measuring and multiplying the consumption time with a clock. It is necessary to perform a complicated calculation of multiplying by a multiplier of 60 in order to convert to the consumption per hour, and further multiplying by a power company coefficient. In terms of the formula, the integrated value of the measured current value (consumption time) × the integrated measurement value of the voltage measurement value (consumption time) × 60 × the coefficient of the power company had to be determined. Among them, a tester was required to simultaneously measure the integrated value (consumption time) of the current and the voltage, and it could not be easily measured.

As an example of calculating an integrated value of current and voltage, an outlet type AC measuring instrument disclosed in Japanese Patent Application Laid-Open No. 7-218555 discloses a method of measuring a current value by installing a digital ammeter or an analog ammeter in a plug outlet. And a digital power meter to measure power, and a digital integrated wattmeter to measure and display integrated power. In Japanese Patent Application Laid-Open No. 7-235346, a transformer circuit, a current detection circuit, and a voltage detection circuit are provided in one plug outlet to measure a current value and a voltage value. It has a structure in which a display device capable of displaying a plurality of electric quantities of each load device is provided.Therefore, a power rate cannot be calculated without multiplying a power consumption rate conversion coefficient which defines a conversion price per unit of a power company. Was. In order to display electricity bills, it is necessary to connect and convert the equipment to be converted separately, and to display the integrated electric plug outlet that measures from the current and voltage values and converts it to the amount of electricity consumption and displays it There was no vessel.

[0004]

[0007] The billing statement issued by the electric power company clearly indicates the total amount of electricity used. And could not be displayed.

[0005] In addition, even if a publicly-used instrument as described above is used, if a company rents facilities or the like at an exhibition hall or an event hall, and the hall is used by one company, the electricity rate will be reduced. However, there was no device for measuring the power consumption of each of the plurality of borrowers at the venue and displaying the charges.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide an electric power plug socket for displaying the electric power consumption of each electric appliance. Is provided.

[0007]

The gist of the present invention is that a current sensor for measuring an electric current value and a voltage are converted into a voltage on a wiring of a path through which electricity flows from an entrance side to an exit side inside the electric plug outlet. A measuring transformer is provided, a full-wave rectifier circuit for rectifying each sine wave of the measured current value and the converted voltage value is provided, and an average value circuit for calculating an average value of the rectified rectified waveform is provided. A microcomputer that calculates the average value of the voltage value and the voltage value, multiplies the conversion amount per unit by the power company by a determined power consumption rate conversion coefficient, converts the value into the amount of power consumption, and displays a display unit that displays the amount It is a plug outlet that has been provided with power rates.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is an external view of the present invention. FIG. 2 shows an embodiment of a block circuit diagram according to the present invention. FIG. 3 shows an embodiment in which the extension cord of FIG. FIG. 4 shows an embodiment in which the present invention is incorporated in a household 100 V outlet. Here, since the internal mechanisms and circuits in FIGS. 1, 3 and 4 are the same as those shown in FIG. 2, FIG. 2 will be described as an example.

[0009] The electric plug 2 is connected to the 100 V outlet 1 in the home, and the electric plug 4 of the appliance to be used or measured is connected to the outlet 3. That is, a circuit connecting the outside line and the inside line is configured. A well-known measuring current sensor 6 and a well-known measuring transformer 7 are provided in the electric wiring path 5 from the entrance side electric plug 2 to the outlet side outlet 3. When the electric appliance connected to the electric plug 3 is turned on, a current sensor for measuring when electricity passes from the 100 V outlet 1 in the home to the electric appliance through the electric plug 2, the outlet 3 and the electric plug 4. 6 converts to a current value, and the measuring transformer 7 converts to a voltage value. Further, the sine wave of the converted current value shown in FIG. 5 is converted into a rectified waveform shown in FIG. 6 via the full-wave rectifier circuit 8, and an average circuit 9 is provided to obtain an average value of the rectified waveform. Take. By taking the average value of the rectified waveform, the current value can be accurately measured.

Similarly, a sine wave of the voltage value converted by the measuring transformer 7 is converted into a rectified waveform via a full-wave rectifier circuit 8, and an average value circuit 9 is provided for obtaining an average value of the rectified waveform. Take the average value of the voltage. By taking the average value of the rectified waveform, the voltage value can be accurately measured.

The average value of the voltage and the average value of the current are sent to the microcomputer 10, and the average value of the current and the average value of the voltage are received.
A microcomputer 10 including an integrating circuit having a general processing capacity of 4 bits or more in which coefficients of an electricity rate conversion table per unit determined by a power company are input in advance. Further, since the microcomputer 10 also has an integrating circuit, it always integrates the current average value and the voltage average value, converts the average value into the amount of power consumption per time, and multiplies the coefficient by a coefficient input in the microcomputer in advance. Thus, the integrated charge of the power charge can be calculated.

The microcomputer 10 converts the value calculated by the microcomputer 10 into a segment type or dot matrix type liquid crystal display device 11.
To display the electricity rate.

[0013]

According to the present invention, it is no longer necessary to calculate the power rate from the power amount, and the individual power rate can be known even for the power rate, which was previously known only as the sum of the power consumption of all the electric appliances. became.

[Brief description of the drawings]

FIG. 1 is an external view in which a power rate display device is provided in a household extension plug outlet.

FIG. 2 is a block circuit diagram in which a power rate display device is provided in a household extension plug outlet.

FIG. 3 is an external view in which a plug outlet without an extension cord and a power rate display device are integrated.

FIG. 4 is an external view of a household outlet provided with a power rate display device.

FIG. 5 shows the shape of a sine wave before entering a full-wave rectification circuit and performing rectification processing.

FIG. 6 shows the shape of a rectified waveform after entering a full-wave rectifier circuit and performing rectification processing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 100V outlet in a house 2 Electric plug 3 Outlet 4 Electric plug 5 Electric wiring path 6 Current sensor for measurement 7 Transformer for measurement 8 Full-wave rectification circuit 9 Average value circuit 10 Microcomputer 11 Liquid crystal display

Claims (1)

[Claims] 1. A measuring current sensor for measuring a current value of electricity and a measuring transformer for converting to a voltage are provided on a wiring of a path through which electricity passes from an entrance side to an exit side inside the electric plug outlet, A full-wave rectifier circuit for rectifying each sine wave of the current value and the converted voltage value is provided, and an average value circuit for calculating an average value of the rectified rectified waveform is provided.
Calculate the average value of the current value and the voltage value, and install a microcomputer that multiplies the conversion amount per unit by the power consumption rate conversion coefficient in the power company, and convert it to the amount of power consumption.
A power rate display plug outlet, comprising a display unit for displaying the amount.