JP2012191825A - Energy management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an energy management system by which a user can check the condition of the electric power used for buildings and automobiles from different view points.SOLUTION: An energy management system connects a photovoltaic generation system, a storage battery, a system power, a vehicle storage battery, an electric appliance, and house hold equipment to a distribution panel to monitor each electric power status, and displays the generated electric power of the photovoltaic generation system, the power storage amount of the storage battery, the power storage amount of the vehicle storage battery, and the use electric power amount, respectively, in HEMS display parts. At this time, the electric power is indicated in the default unit and the unit can be changed over by operating a unit switch button to allow each electric power status to be displayed in a desired unit.

Description

  The present invention relates to an energy management system, and more particularly to an energy management system that includes a power generation device and a storage battery and controls power supply to a building.

  Conventionally, in order to secure electric power in the event of a disaster, a technique has been proposed in which a storage battery or the like is provided separately from the grid power and used in a house during a power outage.

  For example, in the technique described in Patent Document 1, it is possible to supply power to each electric load using either a commercial power system or a power supply device (hybrid vehicle) different from the commercial power system, and a power cutoff device and a power monitoring device for each power line. Is provided. Then, when the power monitoring device supplies power from the hybrid vehicle, the power monitoring status of the electric load is monitored for each power monitoring device, and the controller controls the shut-off device according to the power usage status monitored by the power monitoring device. Thus, it has been proposed to control power supply to each electric load for each power line.

JP 2007-282456 A

  However, in the technique described in Patent Document 1, continuous power supply can be performed using power from a hybrid vehicle or the like in addition to system power, but display for grasping usable energy is performed. Is not described, there is room for improvement.

  In addition to grid power and power stored in storage batteries mounted on automobiles, use of power generated by various power generators such as solar power generators is also envisaged. It is diversified and various display technologies are desired.

  The present invention has been made in view of the above-described facts, and an object of the present invention is to make it possible to confirm the status of power used in buildings and automobiles from various viewpoints.

  In order to achieve the above object, the invention described in claim 1 is a power generation device that generates power using natural energy, and is provided in a building to store at least one of the power generated by the power generation device and the system power. Storage battery, a vehicle storage battery that is mounted on a vehicle and stores power supplied from the outside or power generated by the vehicle, the generated power, the storage power of the storage battery, the storage power of the vehicle storage battery, and Supply means for supplying each power of the grid power to a predetermined supply destination in accordance with a predetermined priority, and supply detection means for detecting the supply destination and supply amount of each power supplied by the supply means; A storage amount detection means for detecting the storage amount of the storage battery and the vehicle storage battery; a power usage detection means for detecting a power usage amount of the building or a power usage amount for each room of the building; Selection means for selecting a display unit to be used from among the displayed display units, and based on a predetermined correspondence between a unit of power and another unit, the supply detection means, the storage amount detection means, and the Display means for converting each detection result unit of the power usage detection means into a unit selected by the selection means and displaying each detection result together with the power flow in the converted unit.

  According to the first aspect of the present invention, the power generator generates power using natural energy such as sunlight, wind power, and hydropower.

  The storage battery is installed in a building and stores at least one of the power generated by the power generation device and the system power. The vehicle storage battery is mounted on a vehicle and supplied from the outside or generated by the vehicle. Is stored.

  In the supply means, the generated power of the power generation device, the stored power of the storage battery, the stored power of the vehicle storage battery, and the system power are supplied to a predetermined supply destination according to a predetermined priority order. For example, it controls the supply of electric power such as supplying power generated by a power generation device to a building, supplying it to a storage battery for charging, or supplying electric power stored in the storage battery to a building.

  The supply detection means detects the supply destination and supply amount of each power supplied by the supply means, the storage amount detection means detects the storage amount of the storage battery and the vehicle storage battery, and the power usage amount detection means The power usage of the building or the power usage for each room of the building is detected.

  Then, the selection unit can select a unit to be displayed from among the predetermined units, and the display unit determines the supply detection unit, the charged amount based on the predetermined correspondence between the unit of power and the other unit. The units of the detection results of the detection means and the power usage amount detection means are converted into the units selected by the selection means, and the detection results are displayed together with the power flow in the converted units. Thereby, the state of energy in the building can be confirmed by the display of the display means. In addition, the energy status can be confirmed not only in the unit of electric power but also in other predetermined units (for example, a unit such as a travel distance, an electricity bill, and a CO2 emission amount). Therefore, it is possible to confirm the state of power used in buildings and automobiles from various viewpoints.

  In addition, as in the invention described in claim 2, the input means for inputting the estimated travel distance of the automobile, and the prediction means for predicting the power generation amount of the power generation device, the storage amount of the storage battery, and the power usage amount of the building, respectively. And the display unit converts each unit of the estimated travel distance input by the input unit and the prediction result of the prediction unit to a unit selected by the selection unit based on the correspondence, and converted The estimated travel distance and the prediction result may be further displayed in units. As a result, it is possible to confirm the amount of power generation, the amount of stored electricity, the amount of power used, and the like with respect to the travel distance such as the next day in terms of distance.

  Further, as in the third aspect of the present invention, the selection means includes a display switching button for instructing to switch units, the display means displays the unit of power with priority, and the display switching button is operated. In such a case, it may be converted into a unit designated by the display switching button and displayed. That is, it is possible to display in units of power as a default display, and to switch to display in another unit by operating the display switching button.

  Further, as in the invention described in claim 4, the occupancy detecting means for detecting the occupancy of each room of the building is further provided, and the display means is provided with the detection results of the occupancy detecting means and the power consumption detecting means. Based on this, it may be further displayed that there is wasted energy consumption in the absent room. Thereby, it can be advised that there is wasteful power consumption in the absent room.

  Further, as in the invention described in claim 5, when the power usage detected by the power usage detection means exceeds a predetermined value and the air conditioner is operating, the air conditioning is performed so as to suppress the energy consumption. You may make it further provide the control means which controls an apparatus. As a result, when the power consumption increases while using the air conditioner, the energy consumption is suppressed by automatically controlling the air conditioner, so that an energy saving effect can be obtained.

  As described above, according to the present invention, there is an effect that the state of electric power used in a building or an automobile can be confirmed from various viewpoints.

It is a block diagram which shows schematic structure of the energy management system concerning embodiment of this invention. It is a block diagram which shows schematic structure of HEMS contained in the energy management system concerning embodiment of this invention. It is a figure which shows an example of the conversion table for converting a unit. It is a figure which shows an example of the initial screen displayed on the display part of HEMS of the energy management system concerning embodiment of this invention. It is a figure which shows an example of the display screen at the time of converting a unit into "circle". It is a figure which shows an example which displayed the advice which shows that the energy for each room is shown, and room B is unmanned and has much power consumption. It is a flowchart which shows an example of the flow of the process performed by HEMS of the energy management system concerning embodiment of this invention. It is a figure which shows the example which converted and displayed each energy amount estimated based on the conversion table.

  Hereinafter, an example of an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of an energy management system according to an embodiment of the present invention. In FIG. 1, the solid line indicates a power line, and the dotted line indicates an information line.

  The energy management system 10 according to the embodiment of the present invention includes a solar power generation device 12 and can use electric power generated by sunlight in a house. In addition, although this embodiment demonstrates the example provided with the solar power generation device 12, it is not restricted to this, For example, it is provided with the power generation device using various natural energy, such as a wind force, hydraulic power, and thermal power. Alternatively, a power generation device such as a fuel cell may be provided.

  The solar power generation device 12 is configured to include a power control system (not shown), and DC power generated by the solar power generation device 12 is converted into AC power by the power control system and supplied to the distribution board 14. As a result, electric power is supplied to the house.

  The distribution board 14 is connected to a storage battery 24 that stores at least one of the grid power 18 supplied from the power company and the power generated by the solar power generator 12. In addition to the generated power, the power stored in the grid power 18 and the storage battery 24 can be supplied to the house, and the storage battery 24 can be charged by the solar power generation device 12 and the grid power 18. It is possible. In addition, various storage batteries, such as a lithium ion battery, a lead battery, and a sodium battery, can be applied to the storage battery 24.

  The distribution board 14 is connected to a charging stand 26 for charging a vehicle storage battery 28 mounted on a hybrid vehicle, an electric vehicle or the like, and supplies power from the distribution board 14 to the charging stand 26. The vehicle storage battery 28 can be charged. Further, in the present embodiment, the charging stand 26 can supply electric power to the distribution board 14 by converting electric power from the vehicle storage battery 28 to alternating current in an emergency or the like.

  In addition, the distribution board 14 is connected to home appliances 20 and housing equipment 22 provided in a house. That is, power such as power generated by the solar power generation device 12, system power 18, and power stored in the storage battery 24 is supplied to the home appliance 20 and the residential equipment 22 through the distribution board 14.

  Further, a HEMS (Home Energy Management System) 30 for managing and controlling energy in the house is connected to the distribution board 14. The HEMS 30 controls the distribution board 14 to perform power switching control in order to supply any of the generated power of the solar power generation device 12, the power of the storage battery 24, and the system power 18 to the house.

  FIG. 2 is a block diagram showing a schematic configuration of the HEMS 30 included in the energy management system 10 according to the embodiment of the present invention.

  As shown in FIG. 2, the HEMS 30 includes a CPU 36, a ROM 38, a RAM 40, and an input / output port 42. These include a bus 44 such as an address bus, a data bus, and a control bus. Are connected to each other.

  A display unit 46, an operation unit 48, and a memory 50 are connected to the input / output port 42 as various input / output devices. The display unit 46 and the operation unit 48 are integrally configured, and the operation unit 48 may be applied with a touch panel provided on the display unit 46, or may include an operation button in addition to the touch panel. Good.

  The memory 50 includes a program for performing various controls relating to the power supply in the house and a display control for displaying on the display unit 46, a program for controlling the home appliance 20 and the housing equipment 22, and the like. Various information for executing the program is stored, and the program stored in the memory 50 is expanded on the RAM 40 or the like and executed by the CPU 36, whereby various controls relating to power supply in the house and control such as display control are performed. Is supposed to do.

  Further, the input / output port 42 includes a storage battery remaining amount sensor 54 for detecting the remaining amount of the storage battery 24, a distribution board 14, and a human sensor 16 for detecting presence / absence of each room in the house. It is connected. The input / output port 42 may be connected to a network such as the Internet so that information can be exchanged with an external device (for example, a predetermined information center).

  In the present embodiment, the HEMS 30 acquires the remaining amount of the storage battery 24 detected by the storage battery remaining amount sensor 54, whereby the storage amount of the storage battery 24 can be displayed on the display unit 46.

  The distribution board 14 has a function of detecting the amount of power supplied from the system power 18, the amount of power generated from the solar power generation device 12, the amount of power used in each room, and the like. 14, the supply amount of the system power 18, the power generation amount of the solar power generation device 12, the power usage amount, and the like can be acquired, and each power can be displayed on the display unit 46. At this time, in the present embodiment, it is possible to change and display the unit of each power. For example, a conversion table for converting the unit shown in FIG. 3 is stored in advance as a predetermined correspondence relationship between the unit of power and other units, and display in the unit specified by the operation of the operation unit 48 is possible. Has been. Note that the conversion table can be set by predetermining the correspondence between a predetermined unit amount of power and other physical quantities that can be converted from the power amount. In addition, the conversion table of FIG. 3 shows the conversion table when the unit can be changed to the electric amount, the electricity bill, the travel distance, the CO2 emission amount, and the temperature. Further, the conversion table in FIG. 3 is created in consideration of the charge of a certain electric power company and the fuel consumption of a certain vehicle type, and the numerical values are not limited to this, and may be set as appropriate depending on the electric power company and the vehicle type. . Further, the conversion table may be changed by the HEMS 30 acquiring information such as an electricity bill and fuel consumption from the outside via a network.

  Here, an outline of display control of the display unit 46 performed in the HEMS 30 of the energy management system 10 according to the embodiment of the present invention will be described. FIG. 4 is a diagram illustrating a display example of the initial screen of the display unit 46.

  For example, an initial screen as shown in FIG. 4 is displayed on the display unit 46 of the HEMS 30. In the initial screen of FIG. 4, the generated power of the solar power generation device 12 (power generation device in FIG. 4), the storage amount of the storage battery 24, the storage amount of the vehicle storage battery 28, and the amount of power used are displayed. Specifically, the HEMS 30 acquires the detection results of each power amount (power generation amount, power storage amount of the storage battery 24, and power consumption amount) from the distribution board 14, and acquires the detection result of the storage battery remaining amount sensor 54. Display the amount of each power. In the initial state, each power amount is displayed in units of power, as in a general display.

  At this time, when the operation for “entire / room” shown in FIG. 4 is performed, it is possible to select whether to display power as the entire house or to display power for each room.

  Further, in the present embodiment, it is possible to display the energy in the house (the amount of power generation, the amount of electricity stored in the storage battery 24, the amount of electricity stored in the vehicle storage battery 28, the amount of power used) in other units. The unit to be displayed can be selected by performing an operation on “unit: circle” in 4. For example, the units to be displayed are sequentially switched by touching the “unit: Kw / h” portion shown in FIG. 4 as the unit switching button. FIG. 5 shows a diagram when the unit is converted to “circle”. The unit conversion is performed by converting the amount of power displayed using a predetermined conversion table or the like into another unit such as a charge. By changing the unit in this way, it becomes possible to capture energy from various viewpoints.

  Further, by performing an operation to “priority” shown in FIG. 4, it is possible to set the priority order of power supply. FIG. 4 shows an example in which priorities are set in the order of (1) to (8) by default, but the default priorities are changed by touching “priority” and performing a predetermined operation. be able to.

  In addition, by performing an operation on “advice” shown in FIG. 4, advice regarding energy in the house is displayed. For example, the HEMS 30 acquires the detection result of the human sensor 16 and detects the power supply status (operating status of the home appliances 20 and the dwelling equipment 22) to each room, whereby the power consumption of the unattended room is detected. Etc. are detected and advice on waste of electric power is advised. More specifically, as shown in FIG. 6, advice indicating that the room B is unattended and consumes a lot of power is displayed. In the case of this example, the power for each room is displayed, and from the detection result of the human sensor 16 in each room, it is shown that the room B is unmanned and “1 Kw” is consumed. Or, display a message such as “Energy consumption exceeds 3Kwh. Please adjust the air conditioning temperature.” “There is energy consumption in the absence room. Please check.” May be.

  Furthermore, the “warning” shown in FIG. 4 blinks when, for example, the remaining amount of the storage battery 24 falls below a predetermined amount (for example, 10%), and displays “Discharge is stopped” or the like. When the vehicle storage battery 28 such as an electric vehicle is not connected, it may blink and display a message such as “Please connect the cable when charging”.

  Next, a specific flow of display processing performed in the HEMS 30 of the energy management system 10 according to the embodiment of the present invention configured as described above will be described. FIG. 7 is a flowchart showing an example of a flow of processing performed in the HEMS 30 of the energy management system 10 according to the embodiment of the present invention.

  In step 100, the power generation amount of the solar power generation device 12 and the power storage amount of the storage battery 24 are detected, and the process proceeds to step 102. That is, the HEMS 30 acquires the measurement result of the power generation amount input from the solar power generation device 12 to the distribution board 14 from the distribution board 14, and the HEMS 30 acquires the detection result of the storage battery remaining amount sensor 54. When the vehicle storage battery 28 is connected to the charging stand 26, the remaining amount of the vehicle storage battery 28 may be detected by the charging stand 26, and the detection result may be acquired by the HEMS 30.

  In step 102, the amount of power used is detected, and the routine proceeds to step 104. That is, the HEMS 30 acquires from the distribution board 14 the measurement result of the amount of power supplied to the home appliance 20 and the residential equipment 22.

  In step 104, an initial screen is displayed on the display unit 46, and the process proceeds to step 106. In the present embodiment, the amount of power generated by the solar power generation device 12 and the amount of electricity stored in the storage battery 24 acquired in steps 100 to 102 (the amount of electricity stored in the vehicle storage battery 28 when the vehicle storage battery 28 is connected, and Based on the amount of power stored in the storage battery 24) and the amount of power used, each power amount is displayed on the display unit 46 as shown in FIG. Thereby, the state of the electric power energy in a house can be notified visually. At this time, in the present embodiment, the unit of power is displayed by default, but another unit may be used.

  In step 106, it is determined by the HEMS 30 whether or not the “overall / room” button has been operated. In this determination, it is determined whether or not the “entire / room” portion of FIG. 4 has been touch-operated in order to select whether to display the power display for the entire house or for each room. If yes, the process proceeds to step 108. If negative, the process proceeds to step 114.

  In step 108, it is determined whether or not “entire” is being displayed. This determination is made by touching the “whole / room” portion in FIG. 4 in order to select whether to display the whole or each room as a display method when displaying the energy supply state. It is determined whether or not “whole” has been selected. If the determination is negative, the process proceeds to step 110, and if the determination is affirmative, the process proceeds to step 112.

  In step 110, the display is switched to the whole display and the process proceeds to step 114. For example, a screen like the entire display example shown in FIG. 4 is displayed.

  In step 112, the display is switched to each room, and the process proceeds to step 114. For example, a screen for each room as shown in FIG. 6 is displayed.

  In step 114, the HEMS 30 determines whether or not the “unit” button has been operated. In this determination, in order to change the unit in the display of the energy supply state, it is determined whether or not the unit has been selected by touching the “unit” portion in FIG. 4, and the determination is affirmed. If YES, the process proceeds to step 116, and if NO, the process proceeds to step 120.

  In step 116, the value of the unit selected based on the conversion table for converting the unit is calculated, and the process proceeds to step 118.

  In step 118, the calculation result of step 116 is displayed on the display unit 46, and the process proceeds to step 120. Thereby, the energy state can be displayed in various units. For example, FIG. 4 shows an example displayed in units of electric energy, and FIG. 5 shows an example displayed in units of electricity charges. Note that, by default, the unit of power is displayed with priority as described above, and the unit is switched by operating the “unit” button.

  In step 120, the HEMS 30 determines whether or not the “priority” button has been operated. This determination is made to determine whether or not the “priority” portion in FIG. 4 has been touch-operated in order to change the priority of power supply. If so, the process proceeds to step 124h.

  In step 122, the priority order of power supply is changed to the priority order corresponding to the operation, and the process proceeds to step 124. For example, although not shown, when a “priority” portion is touched, a predetermined change screen for changing the priority order is displayed, and the priority order is changed according to the displayed change screen. Can do. In the present embodiment, it is assumed that priorities are set in the order of (1) to (8) shown in FIG. 4 in the default state, and the processing is performed when the priorities are changed. .

  In step 124, the HEMS 30 determines whether or not the “advice” button has been operated. The determination is to determine whether or not the “advice” portion in FIG. 4 has been touch-operated in order to display advice regarding energy saving or the like. If the determination is affirmative, the process proceeds to step 126. If not, the process proceeds to step 128.

  In step 126, advice display processing is performed, and the process proceeds to step 128. In the advice display process, for example, when the HEMS 30 acquires the current power usage amount from the distribution board 14 and the usage amount exceeds a predetermined value, “the energy consumption has exceeded 3 kW. Please display a message such as “Please” on the display unit 46 and further obtain the detection result of the human sensor 16, as shown in FIG. 6, “Room B is unused. Is displayed on the display unit 46. Thereby, the resident can confirm the display on the display unit 46 and change the temperature setting of the cooling / heating, or turn off useless lighting, thereby reducing energy consumption. That is, energy saving can be promoted by advice. At this time, when the energy consumption exceeds a predetermined amount and air conditioning is used, the HEMS 30 may control the home appliance (air conditioner) 20 to suppress energy consumption.

  In step 128, whether or not there is a warning is determined by the HEMS 30, and if the determination is affirmative, the process proceeds to step 130, and after the warning is displayed on the display unit 46, the process proceeds to step 132. If the determination is negative, the process proceeds to step 132 as it is. For example, in steps 128 to 130, the detection result of the storage battery remaining amount sensor 54 is acquired, and a warning is given when the remaining amount of the storage battery 24 is 10% or less from the acquired detection result. In addition to displaying, the screen blinks or the “warning” part blinks. Alternatively, communication is performed between the charging stand 26 and the HEMS 30, and it is determined that a warning is given when the vehicle storage battery 28 is not connected, and “the cable of the vehicle storage battery 28 is not connected. May be displayed on the display unit 46, or a system abnormality or the like may be detected to issue a warning.

  In step 132, it is determined by the HEMS 30 whether or not an instruction to turn off the system has been issued. In this determination, for example, it is determined whether or not the operation unit 48 has been operated to give an instruction to turn off the power. If the determination is negative, the process returns to step 100 and the above processing is repeated, and the determination is affirmative. If so, the series of processing ends.

  Further, in the HEMS 30 of the energy management system 10 according to the embodiment of the present invention, the power generation amount of the solar power generation device 12 of the next day, the power storage amount of the storage battery 24, the power consumption amount, and the like are predicted and converted into distances. Then, display processing such as displaying each energy amount on the display unit 46 is also performed.

  For example, information such as a weather forecast for the next day is input to the HEMS 30, and the power generation amount of the solar power generation device 12, the power storage amount of the storage battery 24, the power consumption amount, etc. are predicted based on the weather forecast, By storing the amount of power generation, the amount of storage battery, the amount of power used, etc., and determining the average value, it is possible to predict the amount of power generation, the amount of power storage, the amount of usage, etc., respectively.

  Then, based on the conversion table shown in FIG. 8, the predicted energy amounts are converted into distances and displayed on the display unit 46, whereby the energy in the house can be confirmed from various viewpoints.

  In addition, for example, it is possible to input the mileage of the next day by operating the operation unit 48 or the like, and confirming the power generation amount by subtracting the input mileage, the power storage amount, the power consumption amount, etc. in terms of distance You can also. For example, in the example of FIG. 8, when “100 km” is input as the estimated travel distance via the operation unit 48, the generated power corresponding to 200 km of the predicted power generation amount is supplied to the storage battery 24 and corresponds to the remaining 200 km. The example of a display which uses the generated electric power and charges the vehicle storage battery 28 with the electric power corresponding to 100 km stored in the storage battery 24 is shown.

  In the above-described embodiment and modification, the predetermined information center 32 receives disaster information from a public institution and transmits disaster information to the HEMS 30 corresponding to the disaster area. The organization itself may be used as the information center 32, and a public organization (information center 32) may directly transmit disaster information to the HEMS 30 via the Internet or the like. In this case, it can be controlled in the same manner as in the above-described embodiments and modifications by determining whether or not the HEMS 30 is an area corresponding to a disaster.

  Further, in the above embodiment, the example in which the unit to be displayed is switched is described. However, the present invention is not limited to this. For example, instead of switching the unit, another unit is added and a plurality of units are added. You may make it display.

DESCRIPTION OF SYMBOLS 10 Energy management system 12 Solar power generation device 14 Distribution board 16 Human sensor 18 System electric power 24 Storage battery 28 Vehicle storage battery 30 HEMS
54 Battery level sensor

Claims (5)

A power generation device that generates power using natural energy;
A storage battery that is provided in a building and stores at least one of the generated power and system power of the power generator;
A vehicle storage battery that is mounted on a vehicle and stores electric power supplied from the outside or generated by the vehicle;
Supply means for supplying each of the generated power, the stored power of the storage battery, the stored power of the vehicle storage battery, and the system power to a predetermined supply destination according to a predetermined priority;
Supply detection means for detecting the supply destination and supply amount of each power supplied by the supply means;
A storage amount detecting means for detecting a storage amount of the storage battery and the vehicle storage battery;
Power usage detection means for detecting the power usage of the building or the power usage of each room of the building;
A selection means for selecting a display unit to be used from predetermined display units;
Based on a predetermined correspondence between a unit of power and another unit, a unit in which each unit of detection results of the supply detection unit, the storage amount detection unit, and the power usage amount detection unit is selected by the selection unit Display means for displaying each detection result together with the flow of power in converted units;
Energy management system with Input means for inputting the estimated travel distance of the vehicle, and prediction means for predicting the power generation amount of the power generation device, the storage amount of the storage battery, and the power usage amount of the building, respectively,
Based on the correspondence, the display unit converts each unit of the estimated travel distance input by the input unit and the prediction result of the prediction unit into a unit selected by the selection unit, and the converted unit The energy management system according to claim 1, further displaying the estimated travel distance and the prediction result.   The selection means includes a display switching button for giving an instruction to switch units. The display means gives priority to display a unit of power, and when the display switching button is operated, the display switching button indicates The energy management system according to claim 1, wherein the energy management system is displayed after being converted into a unit.   It further comprises occupancy detection means for detecting the occupancy of each room in the building, and the display means is based on the detection results of the occupancy detection means and the power consumption detection means, and wasteful energy consumption of the absent room. The energy management system according to any one of claims 1 to 3, further displaying that there is.   Claims further comprising control means for controlling the air conditioner so as to suppress energy consumption when the power use amount detected by the power use amount detecting means exceeds a predetermined value and the air conditioner is operating. Item 5. The energy management system according to any one of Items 1 to 4.

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