JP2009222546A - Electric power information display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric power information display for previously preventing waste of electric power since a result of obtaining sufficient satisfaction is not obtained concerning the waste of the electric power in the movement to lower load onto the earth while practicing a life in consideration of an environment and a tendency for positively coping with the waste of the electric power, as is promoted by persons practicing such movement. <P>SOLUTION: A simple electric energy indicator 10 displays a prediction amount of an electric charge. Thereby when electric equipment is used in a certain condition, it previously displays how much the electric charge is necessary. A person viewing it will consider that the electric equipment is continued to be used as it is or a use method is modified. In addition, the indicator indicates how the electric equipment is used and how much the electric charge is necessary. Consequently, any person viewing the prediction amount avoids waste of electric power unconsciously. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power information display device, and more particularly, to a power information display device used to know information according to individual power consumption of an electric appliance.

  Patent Document 1 discloses a simplified electric energy display that displays numerical values of a plurality of items including an integrated electricity bill in a predetermined order.

According to the invention disclosed in Patent Document 1, it is possible to know a guideline for an electricity bill according to the amount of power consumed for each electric appliance by a very simple usage.
JP 2000-147014 A

  However, the invention disclosed in Patent Document 1 has a problem that it is difficult to save power based on it although it is possible to know the standard of the electricity bill. This is because it is impossible to predict how a certain electric appliance can be used to reduce the electricity bill to be paid.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a power information display device that displays information effective for reducing power consumption when an electric appliance is used. There is.

  In order to achieve the above object, according to an aspect of the present invention, the power information display device displays an estimated amount of electricity charges for the power based on the power supplied to the appliance.

  When the predicted amount of electricity charges is displayed, it will be shown in advance how much electricity fee is required when using the electric equipment. Since it is shown in advance how much power charge is required, it is possible to take effective measures to reduce power consumption. Therefore, information effective for reducing power consumption when using an electric appliance is displayed.

  The power information display device described above preferably includes a current measuring unit, a predicted amount calculating unit connected to the current measuring unit, and a display unit connected to the predicted amount calculating unit. The current measuring means measures the current flowing through the electric appliance. The predicted amount calculation means calculates the predicted amount based on the measured current value indicating the current measured by the current measuring means. The display means displays the predicted amount calculated by the predicted amount calculation means.

  Based on the measured current value, the predicted amount calculation unit calculates the predicted amount of the power charge, and the display unit displays the predicted amount. Since the predicted amount of the power charge is calculated based on the measured current value, the effectiveness of the predicted amount is high. Therefore, highly effective information can be displayed.

  Alternatively, it is desirable that the estimated amount calculation unit described above includes a storage unit and a calculation unit. The storage means stores the amount of power. The computing means includes time measuring means, power amount updating means, and unit time amount calculating means. The time measuring means measures time. The power amount update means calculates the amount of power supplied to the electric appliance and updates the power amount stored in the storage means. The power amount updating means calculates the supplied power amount by multiplying the measured current value by a coefficient, and updates the power amount stored in the storage means according to the supplied power amount. The unit time amount calculation means calculates an electricity rate per unit time. The unit time amount calculation means calculates an electricity charge per unit time based on the amount of power stored in the storage means, the time measured by the time measurement means, and the electricity charge per unit power amount. In addition, it is desirable that the display means displays the electricity rate per unit time as the predicted amount.

  The amount of power supplied is calculated by multiplying the measured current value by a coefficient. The amount of power stored in the storage unit is updated according to the amount of power supplied. Based on the amount of power stored in the storage means, an electricity charge per unit time is calculated and displayed as an estimated amount of electricity charge. As a result, a predicted value of the power rate is calculated based on the current already supplied to the electric appliance, and the predicted value reflects the fluctuation of the current actually supplied to the electric appliance. As a result, the effectiveness of the predicted value is improved as compared with the case where the fluctuation of the actually supplied current is not reflected.

  Alternatively, it is desirable that the above-mentioned storage means has means for storing the elapsed time from the start of timing in addition to the amount of power. The start of timing is when power supply from the power source is started. In addition, it is desirable that the amount of power stored by the storage means is an integrated amount of power supplied to the appliance after the start of timing. In addition, it is desirable that the time measuring means measures the elapsed time. In addition, it is desirable that the power amount updating unit updates the integrated power amount stored in the storage unit so as to increase by the amount of supplied power. At the same time, it is desirable that the unit time amount calculation means calculates the product of the quotient relating to the elapsed time of the integrated power amount and the electricity rate per unit power amount.

  The unit time amount calculation means calculates the product of the quotient relating to the elapsed time of the integrated power amount and the electricity rate per unit power amount. Thereby, even if it is a case where the electric current supplied to an electric appliance changes temporarily, the fluctuation | variation of the estimated amount by that is suppressed.

  Alternatively, the power information display device described above preferably further includes power supply connection means and power supply means connected to the electric appliance. The power connection means is connected to a power supply that supplies power. The power supply means supplies the electric appliance with the power supplied from the power supply via the power supply connection means.

  The power information display device according to the present invention can display information effective for reducing power consumption when using an electric appliance.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

  FIG. 1 is a diagram showing an appearance of a simplified electric energy display 10 according to the present embodiment. FIG. 2 is a rear view of the simplified electric energy display 10 according to the present embodiment. As shown in FIGS. 1 and 2, the case of the simplified electric energy display 10 according to the present embodiment includes a case main body 12 and a lid cover 14. The case body 12 is molded from a thermosetting resin such as a heat-resistant ABS (Acrylonitrile butadiene styrene) resin. The lid cover 14 is the same.

  A device plug 16 is provided on the back surface of the case body 12. The device plug 16 is inserted into an outlet (not shown) fixedly installed on a wall surface or the like. Since the device plug 16 has a rotatable structure, it can be accommodated in a recess provided in the lid cover 14.

  An outlet 18 is provided on the bottom surface of the case body 12. The electrical outlet 18 can be inserted with various electric appliances.

  A rectangular opening 140 is formed on the surface of the lid cover 14. An LCD (Liquid Crystal Display) display unit 38 faces the opening 140.

  FIG. 3 is a diagram showing a configuration of the simplified electric energy display 10 according to the present embodiment. The simplified electric energy indicator 10 according to the present embodiment includes a current transformer (CT) 30, a rectifier / integrator 32, a controller 34, a ROM (Read Only Memory) 36, and an LCD display 38. And a power supply unit 40.

  The current transformer 30 detects an input current from the device plug 16. The rectifier / integrator 32 rectifies the current detected by the current transformer 30 and performs integration. The current transformer 30 and the rectification unit / integration unit 32 constitute a current measurement module for measuring the current flowing through the electrical device connected to the device plug 16.

  The control unit 34 is responsible for the following three roles. The first role is to count the accumulated energization time from the time when the device plug 16 is plugged into the outlet and connected. The second role is to calculate the integrated power amount based on the input current detected by the current transformer 30, and to calculate various kinds of information based on the integrated power amount (one type of which is to estimate the electricity bill for the power supplied to the appliance). Is a forehead). A third role is to control the LCD display unit 38.

  The control unit 34 includes an A / D (Analog-Digital) conversion unit 50, a CPU (Central Processing Unit) 52, and a RAM (Random Access Memory) 64. The A / D converter 50 converts the analog signal (input as a DC voltage) input by the rectifier / integrator 32 into a digital signal. The CPU 52 performs a calculation and control based on the digital signal input by the A / D conversion unit 50 by executing the program stored in the ROM 36. The RAM 64 stores information necessary for executing the program. As an example of information stored in the RAM 64, there is the above-described integrated electric energy. Information stored in the RAM 64 will be described later.

  In the present embodiment, each module (A / D conversion unit 50, CPU 52, and RAM 64) constituting the control unit 34 is integrated, but for the sake of convenience of description, it is regarded as an independent module.

  The ROM 36 stores a program executed by the CPU 52 and information necessary for executing the program.

  The LCD display unit 38 displays the accumulated power amount, the accumulated electricity rate, the carbon dioxide emission amount, or the electricity rate per hour. Details thereof will be described later. The power supply unit 40 generates a power supply necessary for the operation of the control unit 34 and the LCD display unit 38 by the input current from the device plug 16.

FIG. 4 is a diagram showing an appearance of the LCD display unit 38 according to the present embodiment. As shown in FIG. 4, the LCD display unit 38 includes a numerical value display unit 380, an operation display unit 382, and a unit symbol display unit 384. The numerical value display unit 380 has seven segments arranged in an 8-character shape, and displays a three-digit numerical value. The operation display unit 382 is provided on the left side of the most significant digit of the numerical value display unit 380 and blinks in dots. The unit symbol display unit 384 displays unit symbols “yen”, “kWh”, “kg-CO ₂ ”, and “yen / time” on the right side of the least significant digit of the numerical value display unit 380. These unit symbols correspond to a plurality of display items to be described later.

  The LCD display unit 38 displays the above information as a three-digit numerical value. Each of these display methods and display ranges are set as follows.

In the case of accumulated electricity charges;
The range is from 1 yen to 999 yen. The smallest unit is a circle. The display method is a method of not displaying values after the decimal point.

In the case of integrated power consumption;
The range is from 0.01 kWh to 999 kWh. The display method is a method in which the decimal point is moved for display.

For carbon dioxide emissions;
The range is from 0.01 kg-CO ₂ to 999 kg-CO ₂ . The display method is a method in which the decimal point is moved for display.

For electricity charges per hour;
The range is from 0.1 yen to 99.9 yen. The display method is a method in which the minimum unit is 0.1 yen and one decimal place is displayed.

  FIG. 5 shows a predicted amount calculation module (this module is a module for calculating an estimated amount of electricity charges) realized by the control unit 34 and the ROM 36 according to the present embodiment. It is a charge for power, which is calculated based on the current value measured by the current measurement module. The predicted amount calculation module according to the present embodiment includes a calculation unit 70 and a storage unit 72. The calculation unit 70 performs calculation and control. The storage unit 72 stores information necessary for the calculation unit 70 to perform calculation and control.

  The calculation unit 70 includes an elapsed time measurement unit 80, an electric energy update unit 82, a total charge calculation unit 84, a carbon dioxide emission calculation unit 86, a unit time amount calculation unit 88, and a display control unit 90. . The elapsed time measuring unit 80 counts the accumulated energization time from the time when the device plug 16 is plugged into the outlet, that is, the elapsed time from the start of power supply from the power source. The power amount update unit 82 updates the accumulated power amount data stored in the storage unit 72. The total charge calculation unit 84 multiplies the integrated electric energy by the electric charge per unit electric energy (22 yen / kWh in the case of the present embodiment) to calculate the total electric charge. The carbon dioxide emission calculation unit 86 multiplies the integrated electric energy by the carbon dioxide emission per unit electric energy (0.555 kg / kWh in the case of the present embodiment), thereby calculating the total amount of carbon dioxide emitted. Is calculated. The unit time amount calculation unit 88 divides the integrated power amount by the integrated energization time, and multiplies the quotient by the electricity rate per unit power amount to calculate the electricity rate per unit time. The electricity price calculated by the unit time amount calculation unit 88 is a predicted value of the electricity price because it indicates the electricity price required after the unit time has elapsed when the electric product is used in the same manner as before. The display control unit 90 controls the LCD display unit 38 to display the information stored in the storage unit 72.

  The power amount update unit 82 includes a power amount calculation unit 100 and a stored value update unit 102. The power amount calculation unit 100 calculates the power amount based on information indicating the current value (this information is information input by the rectification unit / integration unit 32). The electric energy calculation unit 100 uses a current (in this embodiment, a constant value of 100 volts) and a power factor (in this embodiment, a constant value of 100%) indicated by this information. And the sampling interval (in this embodiment, it is assumed to be 1/20 second). Thereby, the electric energy is calculated. The stored value update unit 102 calculates the sum of the calculated electric energy and the integrated electric energy stored in the storage unit 72, and updates the integrated electric energy stored in the storage unit 72. The accumulated power amount stored in the storage unit 72 is updated to be the sum.

  The storage unit 72 includes an elapsed time storage unit 110, an integrated power storage unit 112, a total charge storage unit 114, a carbon dioxide emission storage unit 116, and a predicted amount storage unit 118. The elapsed time storage unit 110 stores an accumulated energization time (in the present embodiment, the unit of the accumulated energization time is “second”) from the time when the device plug 16 is plugged into the outlet and connected. The accumulated energization time is updated by the elapsed time measuring unit 80. The integrated electric energy storage unit 112 stores the integrated electric energy. The accumulated power amount is updated by the stored value update unit 102. The total charge storage unit 114 stores the total electricity charge. This total is updated by the total fee calculation unit 84. The carbon dioxide emission amount storage unit 116 stores the total amount of carbon dioxide emission. This total is updated by the carbon dioxide emission calculation unit 86. The estimated amount storage unit 118 stores the estimated amount of electricity charges. This amount is updated by the unit time amount calculation unit 88.

  6 to 8 are flowcharts showing measurement display processing of the simplified power amount display 10. FIG. 9 is a flowchart specifically showing the process of S133 (information generation process) shown in FIG. With reference to FIGS. 6-9, the measurement display operation | movement of the simple electric energy indicator 10 which concerns on this Embodiment is demonstrated.

[When immediately after display starts]
When the user inserts and connects a plug of a desired electrical appliance to the outlet 18 and then plugs and connects the device plug 16 to the outlet, the display control unit 90 (actually the CPU 52) resets all the displays on the LCD display unit 38 (steps). S121, S122).

  It is determined whether or not the appliance connected to the outlet 18 has power consumption at the same time as the connection of the device plug 16 to the outlet 18 (step S123). If there is power consumption (YES in step S123), display control is performed. Under the control of the unit 90, dots are blinked and displayed at intervals of 1 second on the operation display unit 382 of the LCD display unit 38 (step S124).

When the dot is blinking, the accumulated electricity bill and the corresponding unit symbol “yen”, the accumulated power value and the corresponding unit symbol “kWh”, the carbon dioxide emission value and the corresponding LCD display so that the unit symbol “kg-CO ₂ ” and the predicted amount of electricity charges and the corresponding unit symbol “yen / hour” are in this order and a time interval of 3 seconds. It is cyclically displayed on the numerical value display part 380 and the unit symbol display part 384 of the part 38 (steps S126 to S132). The accumulated electricity bill, the accumulated power amount, the carbon dioxide emission amount, and the estimated amount of electricity bill are output from the display control unit 90 to the LCD display unit 38 (since they have not been calculated yet immediately after the start of display, Instead, default values are output).

  When the accumulated electricity bill, the accumulated power amount, the carbon dioxide emission amount, and the predicted amount of electricity bill are displayed, the power amount calculation unit 100 (actually the CPU 52) receives the current value input by the rectification unit / integration unit 32 ( In the case of the present embodiment, the unit of current value is assumed to be amperage), and the amount of power flowing through the appliance is calculated (step S170). In the case of the present embodiment, the power amount calculation unit 100 calculates the power amount by multiplying the current value by a voltage of 100 volts, a power factor of 100%, and a current value sampling interval (1/20 second). .

  When the power amount is calculated, the stored value update unit 102 (actually the CPU 52) reads the accumulated power amount stored therein from the accumulated power amount storage unit 112 (actually the RAM 54). When the integrated power amount is read, the stored value update unit 102 adds the power amount calculated in step S140 and the integrated power amount, and stores the value obtained as a result of the addition in the integrated power amount storage unit 112. Let Thereby, the integrated power amount stored in the integrated power amount storage unit 112 is updated (step S171).

  When the integrated power amount is updated, the total charge calculation unit 84 (actually the CPU 52) reads the integrated power amount stored therein from the integrated power amount storage unit 112. When the integrated power amount is read, the total charge calculation unit 84 divides the integrated power amount by 3600 seconds and multiplies the electricity rate per 1 kWh (22 yen / kWh in the present embodiment). Calculate the total electricity bill. This electricity charge corresponds to the integrated power amount stored in the integrated power amount storage unit 112. When the electricity charge is calculated, the total charge calculation unit 84 stores the calculated integrated electricity charge (total charge) in the total charge storage unit 114 (step S172).

When the total fee is stored, the carbon dioxide emission amount calculation unit 86 (actually the CPU 52) reads the integrated power amount stored therein from the integrated power amount storage unit 112. When the integrated power amount is read, the carbon dioxide emission amount calculation unit 86 divides the integrated power amount by 3600 seconds and generates the amount of carbon dioxide discharged when generating 1 kWh of power amount (this embodiment). multiplying when a _0.555kg-CO 2 / kWh). Thereby, the amount of carbon dioxide corresponding to the accumulated power amount stored in the accumulated power amount storage unit 112 is calculated. When the amount of carbon dioxide is calculated, the carbon dioxide emission calculation unit 86 reads the carbon dioxide emission stored in the carbon dioxide emission storage unit 116 (actually the RAM 54), and calculates the carbon dioxide amount calculated by itself. Add up. Thereafter, the carbon dioxide emission amount calculation unit 86 stores the carbon dioxide emission amount calculated as a result of the summation in the carbon dioxide emission amount storage unit 116 (step S173).

  When the carbon dioxide emission amount is stored, the unit time amount calculation unit 88 (actually the CPU 52) reads the integrated power amount stored therein from the integrated power amount storage unit 112. When the integrated power amount is read, the total charge calculation unit 84 multiplies the integrated power amount by 3600 seconds, and divides by the number of seconds stored in the elapsed time 110 (actually RAM 54), and the electricity charge per kWh. To calculate the electricity bill. This electricity charge is an average value of the electricity charge for one hour with respect to the electric power consumed by the electric appliance. Usually, since the electric appliance is often used continuously, this electric charge is an estimated value of the electric charge that needs to be paid after one hour. When the electricity rate is calculated, the unit time amount calculation unit 88 stores the electricity rate in the predicted amount storage unit 118 (actually the RAM 54). Thereby, the electricity bill memorize | stored in the estimated amount memory | storage part 118 is updated (step S174).

  When the predicted value of the electricity charge is stored, the display control unit 90 reads the total charge from the total charge storage unit 114. When the total fee is read, the display control unit 90 determines whether or not the total fee is less than 999 yen (step S134). In this case, since the total fee is considered to be less than 999 yen (YES in step S134), elapsed time measurement unit 80 reads the accumulated energization time from elapsed time storage unit 110. When the accumulated energization time is read, the elapsed time measuring unit 80 determines whether or not the accumulated energization time is less than the time calculated by the expression “999 × 60 × 60” (that is, whether or not the accumulated energization time is 999 hours). Is determined (step S135). In this case, since it is considered that the cumulative energization time is less than 999 hours (YES in step S135), the processing after step S125 is repeated.

FIG. 10 is a conceptual diagram showing a display form of the LCD display unit 38 according to the present embodiment. While the processes in steps S125 to S135 are repeated, the integrated electricity rate, the integrated power amount, the carbon dioxide emission amount, and the predicted value of the electricity rate calculated by the calculation unit 70 are set in advance in the program stored in the ROM 36. Are displayed in the order of the current order and the time interval, that is, the accumulated electricity bill, the accumulated power amount, the carbon dioxide emission amount, and the predicted value of the electricity bill, and at intervals of 3 seconds. These are cyclically displayed on the numerical value display unit 380 of the LCD display unit 38. At the same time, unit symbols are displayed on the unit symbol display unit 384 in the order of “yen”, “kWh”, “kg-CO ₂ ”, and “yen / hour” corresponding to each display item. Further, when the electric appliance plugged into and connected to the outlet 18 has power consumption, dots are blinked on the operation display unit 382 of the LCD display unit 38 at intervals of one second.

  If the device plug 16 is pulled out from the outlet while the processes in steps S125 to S135 are repeated, power is not supplied to the power supply unit 40 and all information stored in the RAM 64 is erased. For this reason, all the displays on the LCD display section 38 are reset. Thereafter, the device plug 16 is reinserted into the outlet and connected to start measurement display from the beginning.

[If the total charge exceeds 999 yen]
Through the processing up to step S133 (that is, the processing up to step S174), the display control unit 90 reads the total fee from the total fee storage unit 114. When the total fee is read, the display control unit 90 determines whether or not the total fee is less than 999 yen (step S134). In this case, since the total charge is 999 yen or more (NO in step S134), power amount calculation unit 100 stops sampling information indicating the current value (step S140).

When the sampling is stopped, the display control unit 90 displays the numerical value “999” and the unit “circle” on the LCD display unit 38 (step S141). After 3 seconds have elapsed since they were displayed (step S142), the display control unit 90 reads the integrated power amount stored in the integrated power amount storage unit 112. When the integrated power amount is read, the display control unit 90 causes the LCD display unit 38 to display a numerical value indicating the integrated power amount and a unit of “kWh” (step S143). After 3 seconds have elapsed since they were displayed (step S144), the display control unit 90 reads the carbon dioxide emission amount stored in the carbon dioxide emission storage unit 116. When the carbon dioxide emission amount is read, the display control unit 90 displays a numerical value indicating the carbon dioxide emission amount and a unit of “kg-CO ₂ ” on the LCD display unit 38 (step S145). After 3 seconds have elapsed since they were displayed (step S146), the display control unit 90 displays the predicted value of the electricity charge stored in the estimated amount storage unit 118 (the electricity charge per hour calculated last). read out. When the predicted value of the electricity bill is read, the display control unit 90 displays a numerical value indicating the predicted value and a unit of “yen / hour” on the LCD display unit 38 (step S147). After 3 seconds have elapsed since they were displayed (step S148), the processing after step S141 is repeated. In this way, the accumulated power amount, the accumulated electricity rate, the carbon dioxide amount, and the estimated electricity rate are cyclically displayed.

[When the accumulated power becomes 999 kWh or more]
Through the processing up to step S134, the elapsed time measurement unit 80 reads the accumulated energization time from the elapsed time storage unit 110. When the accumulated energization time is read, the elapsed time measuring unit 80 determines whether or not the accumulated energization time is 999 hours (step S135). In this case, since the cumulative energization time is 999 hours or more (YES in step S135), power amount calculation unit 100 stops sampling information indicating the current value (step S150).

When the sampling is stopped, the display control unit 90 reads the total fee stored in the total fee storage unit 114. When the total charge is read out, the display control unit 90 displays the numerical value indicating the total charge and a unit of “yen” on the LCD display unit 38 as a flicker (the lighting time is 0.5 seconds and the turn-off time is 0.5 seconds). (Step S151). After 3 seconds have elapsed since they were displayed (step S152), the display control unit 90 reads the integrated power amount stored in the integrated power amount storage unit 112. When the integrated power amount is read, the display control unit 90 causes the LCD display unit 38 to flicker the numerical value indicating the integrated power amount and the unit “kWh” (step S153). After 3 seconds have elapsed since they were displayed (step S154), the display control unit 90 reads the carbon dioxide emission amount stored in the carbon dioxide emission storage unit 116. When the carbon dioxide emission amount is read, the display control unit 90 causes the LCD display unit 38 to flicker display a numerical value indicating the carbon dioxide emission amount and a unit of “kg-CO ₂ ” (step S155). After 3 seconds have elapsed since they were displayed (step S156), the display control unit 90 reads the last calculated electricity rate per hour from the predicted amount storage unit 118. When the electricity rate is read, the display control unit 90 causes the LCD display unit 38 to flicker display a numerical value indicating the electricity rate and a unit of “yen / hour” (step S157). After 3 seconds have elapsed since they were displayed (step S158), the processing after step S151 is repeated. In this way, when the accumulated energization time becomes full (999 hours), the accumulated power amount, the accumulated electricity rate, the carbon dioxide amount, and the estimated amount of electricity rate are cyclically flickered.

  As described above, according to the present invention, the integrated power amount of the electric appliance plugged into the outlet 18 and the integrated electricity rate according to the integrated power amount, the carbon dioxide emission amount, and the electricity rate per hour are displayed on the LCD. It can be displayed on the display unit 38 at set time intervals. The operation for this is a simple operation in which a desired electrical appliance is inserted and connected to the outlet 18, and the device plug 16 is inserted and connected to the outlet fixedly installed on the wall surface or the like. By reading these displayed numerical values, it is possible to arbitrarily know the accumulated power amount, the accumulated electricity bill, the carbon dioxide emission amount, and the standard of the electricity bill per hour for each electric appliance. Since it is possible to know those guidelines, it is possible to easily implement power saving measures based on that. In addition, since the numerical values are cyclically displayed on the single LCD display unit 38, the occupied area of the LCD display unit 38 can be obtained while making the size of the displayed numeric characters not to be misread. Can be reduced. By reducing the area occupied by the LCD display unit 38, it is possible to reduce the overall weight of the simplified power amount display 10 and make it compact. By reducing the overall weight of the simplified type electric energy display 10 and making it compact, the handling can be made very simple.

  Note that the power information display device having the configuration shown in FIG. 3 may be incorporated in an electric appliance. In that case, the device plug 16 and the outlet 18 are not necessarily required. Further, other modules may also be used as modules used for other purposes in the electric appliance. If it is based on the power supplied to the appliance, it is not based on the current measured by the current measurement module, but based on other physical quantities (for example, the correlation between the current value and temperature is specified in advance, and the temperature sensor measures Based on the measured temperature), the integrated electric energy may be calculated.

  Further, the algorithm for calculating the predicted amount of electricity charges is not limited to the above-described algorithm. For example, the integrated electric energy storage unit 112 may store only the integrated electric energy for the latest one hour, and calculate the predicted amount based on the integrated electric energy. As long as it is based on the power supplied to the electric appliance, the predicted amount may not be the amount calculated based on the integrated power amount. For example, the amount specified by the least square method from the transition of the electric energy calculated by the electric energy calculator 100 may be used.

  The embodiments disclosed herein are illustrative in all respects. The scope of the present invention is not limited based on the above-described embodiment, and various design changes may be made without departing from the spirit of the present invention.

It is a figure which shows the external appearance of the simple electric energy indicator which concerns on embodiment of this invention. It is a rear view of the simple electric energy indicator which concerns on embodiment of this invention. It is a figure which shows the structure of the simple electric energy indicator which concerns on embodiment of this invention. It is a figure which shows the external appearance of the LCD display which concerns on embodiment of this invention. It is a functional block diagram of the prediction amount calculation module which concerns on embodiment of this invention. It is a 1st flowchart which shows the procedure of control of the measurement display process which concerns on embodiment of this invention. It is a 2nd flowchart which shows the procedure of control of the measurement display process which concerns on embodiment of this invention. It is a 3rd flowchart which shows the procedure of control of the measurement display process which concerns on embodiment of this invention. It is a flowchart which shows the procedure of control of the information generation process which concerns on embodiment of this invention. It is a figure which shows the display form of the LCD display which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Simplified type electric energy display, 12 Case main body, 14 Cover cover, 16 Equipment plug, 18 Outlet, 30 Current transformer, 32 Rectification part and integration part, 34 Control part, 36 ROM, 38 LCD display part, 40 Power supply part , 50 A / D conversion unit, 52 CPU, 54 RAM, 70 calculation unit, 72 storage unit, 80 elapsed time measurement unit, 82 electric energy update unit, 84 total charge calculation unit, 86 carbon dioxide emission calculation unit, 88 units Time amount calculation unit, 90 display control unit, 100 electric energy calculation unit, 102 stored value update unit, 110 elapsed time storage unit, 112 integrated electric energy storage unit, 114 total charge storage unit, 116 carbon dioxide emission storage unit, 118 Predicted amount storage unit, 140 opening, 380 numeric display unit, 382 operation display unit, 384 unit symbol display unit

Claims (5)

  A power information display device that displays a predicted amount of electricity charges for the power based on the power supplied to the appliance. The power information display device
Current measuring means for measuring the current flowing through the appliance;
A predicted amount calculating means connected to the current measuring means for calculating the predicted amount;
A display means connected to the estimated amount calculation means, for displaying the estimated amount calculated by the estimated amount calculation means;
The power information display apparatus according to claim 1, wherein the predicted amount calculation unit calculates the predicted amount based on a measured current value indicating a current measured by the current measuring unit. The estimated amount calculation means includes:
Storage means for storing the amount of power of the power;
An arithmetic means,
The computing means is
A time measuring means for measuring time;
A power amount updating means for calculating a power amount supplied to the electric appliance and for updating a power amount stored in the storage means;
A unit time amount calculation means for calculating an electricity rate per unit time,
The power amount update means calculates the supply power amount by multiplying the measured current value by a coefficient, and updates the power amount stored in the storage means according to the supply power amount,
The unit time amount calculation means calculates the electricity charge per unit time based on the amount of power stored in the storage means, the time measured by the time measurement means, and the electricity charge per unit power amount,
The power information display device according to claim 2, wherein the display unit displays the electricity rate per unit time as the predicted amount. The storage means has means for storing an elapsed time from the start of timing, which is a time when supply of power from the power source is started, in addition to the amount of power,
The amount of power stored by the storage means is an integrated amount of power supplied to the electric appliance after the start of timing,
The time measuring means measures the elapsed time;
The power amount updating means updates the integrated power amount stored in the storage means so as to increase by the amount of supplied power,
The power information display device according to claim 3, wherein the unit time amount calculation unit calculates a product of a quotient of the accumulated power amount with respect to the elapsed time and an electricity rate per unit power amount. The power information display device
Power connection means for connecting to a power supply for supplying the power;
A power supply means connected to the electric appliance, for supplying the electric appliance with the electric power supplied from the power supply via the power supply connecting means;
The power information display device according to claim 2, wherein the current measurement unit is connected to the power supply unit and measures the current.

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