JPH07143670A - Demand controller - Google Patents

Abstract

PURPOSE:To perform load control without spoiling the comfortableness by deciding the operating conditions of air-conditioners in accordance with excessive electric power. CONSTITUTION:Demand-controlled indoor units 5 and 6 of room air-conditioners and an overall wattmeter 9 are connected to a demand controller 1 through IFU 2-4 which convert physical conditions, electrical conditions, and formats related to transmission. The present electric energy outputted from the wattmeter 9 is inputted and the completing time of demand limiting time is predicted, and then, excessive electric power is predicted from the predicted demand and usable electric power. Then the plurality of air conditioners (indoor units 5 and 6) are divided in accordance with the excessive electric power and set temperatures of the air conditioners 5 and 6 are evenly decided from the conditions of the indoor units 5 and 6 detected in advance by means of equipment state monitoring means and the decided temperatures are outputted to the indoor units 5 and 6. Therefore, the loads to the indoor units 5 and 6 can be controlled without spoiling the comfortableness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a demand control device for controlling a load on an air conditioner without compromising comfort.

[0002]

2. Description of the Related Art FIG. 12 is a block diagram showing a conventional demand control apparatus disclosed in Japanese Patent Laid-Open No. 62-37018. In the figure, 1 is a demand control device, and 5 and 6 are air-conditioning devices to be subjected to demand control, and stop control is performed by a command from the demand control device 1. Reference numerals 14 and 15 are rooms in which air conditioning equipment is installed, 16 and 17 are temperature detectors for detecting the temperature of the room in which air conditioning equipment is installed, 1
Humidity detectors 8 and 19 detect the humidity of the room in which the air conditioner is installed.
Provides temperature and humidity information for 4 and 15. Reference numeral 9 is a watt hour meter for detecting the electric energy of the entire load, and provides the demand control device 1 with the current electric power information.

Next, the operation will be described. According to the contract with the electric power company, the customer defines contracted electric power as available electric power. The demand control device 1 fetches the current electric energy of the entire load from the watt-hour meter 9 several times within a predetermined time period, and calculates the electric power that can be used within the remaining time period of the contracted electric power each time. To do. When the calculated current power continues to be consumed and the available power is exceeded by calculation, the demand control device 1 outputs a stop command to one of the air conditioners 5 and 6 with a lower priority to stop the air conditioner. And reduce the power consumption. The number of air conditioners that are shut down increases until the current power is within available power. The priority of the air conditioners 5 and 6 is the temperature detector 1
6, 17 and the temperature and humidity of each room 14, 15 measured by the humidity detectors 18, 19 and the target temperature / humidity set for each room are compared and calculated, and the difference between the target value and the room (14 Alternatively, the air conditioner (5 or 6) of 15) is set to the lowest.

[0004]

In the conventional demand control device, the stop control is applied from the air conditioner close to the set temperature / humidity, so that even in a room with a high heat load, the temperature is suddenly controlled even if the air blow operation is not performed. Changes in humidity occur, and visually the air conditioners are completely stopped, which increases the discomfort of residents.

Further, when the current electric power greatly exceeds the usable electric power value, even the air conditioner in the room which does not reach the set temperature and humidity is stopped, so that the function as the air conditioner cannot be sufficiently fulfilled. There was a point.

The present invention has been made in order to solve the above problems, and even when the current power exceeds the available power, the controlled air conditioning equipment is not stopped, and the number of power supply units is commensurate with the excess power. It is an object of the present invention to provide a device capable of performing demand control without deteriorating comfort by controlling only one.

[0007]

A demand control device according to a first aspect of the present invention is a power system to which a power load including an air conditioner is connected, and when the used power value is about to exceed a contracted power value, the In the demand control device that limits the use,
Equipment state monitoring means for detecting the operating state of the air conditioner, power measurement value monitoring means for inputting the current power usage value of all power loads, and a predetermined time after the current power usage of all current power loads. Power consumption predicting means for predicting power consumption, control content determining means for determining the operation content of the air conditioner according to the excess power value from the contract power value of the predicted power value, and the control content determination And a state control means for outputting to the air conditioner.

A demand control device according to a second aspect of the invention is the demand control device according to the first aspect.
In the demand control device described above, an outside air temperature monitoring means for monitoring an outside air temperature detected by an outdoor unit of the air conditioner, and a representative air unit in which a change value of the set temperature of the air conditioner is predetermined. Means for determining the outside air temperature detected by the outdoor unit of the air conditioner.

The demand control device according to claim 3 is the demand control device according to claim 1.
In the demand control device described above, an outside air temperature monitoring means for monitoring an outside air temperature detected by an outdoor unit of the air conditioner, and a change value of a set temperature of the air conditioner is detected by each of the air conditioner outdoor units. Means for determining using the outside air temperature.

A demand control device according to a fourth aspect of the present invention is the demand control device according to the first aspect.
In the demand control device described, the demand control refusal determination means for comparing the operating state of the air conditioner detected from the device state monitoring means with the operating state output by the state control means to determine that the resident has rejected the demand control. And means for changing the air conditioner for demand control based on the result of the demand control refusal determination means.

A demand control device according to a fifth aspect of the present invention is the demand control device according to the first aspect.
In the demand control device described, the next month forecast contract power calculation means for calculating the next month forecast contract power by comparing the power at the end of the demand time limit and the available power, and the next month forecast displaying the next month forecast contract power And a contracted power display means.

[0012]

In the demand control device according to the first aspect of the present invention, the operation content of the air conditioner is determined according to the excess power, so that the load control can be performed without impairing the comfort.

According to another aspect of the present invention, the demand control device can perform load control without deteriorating the comfort by taking into consideration the temperature difference between the outdoor temperature and the room temperature detected by one representative air conditioner outdoor unit. it can.

In the demand control device according to the third aspect of the present invention, the load control that does not impair the comfort can be performed by considering the temperature difference between the outside air temperature and the room temperature detected by each air conditioner outdoor unit.

The demand control device according to the fourth aspect can perform load control without impairing comfort by accepting the resident's demand control refusal by the remote controller at hand.

The demand control device according to claim 5 displays the predicted contracted power for the next month when the consumed power exceeds the contracted power, so that the load usage status can be grasped in real time and the load management can be facilitated. Become.

[0017]

EXAMPLES Example 1. 1 is a block diagram of a first embodiment of the present invention. IFUs 2, 3 for converting physical and electrical conditions and formats relating to transmission to the demand control device 1,
The air conditioner indoor units 5 and 6 which are the demand control target devices are connected via 4 to the overall power meter 9 that measures the total power consumption. The air conditioner indoor units 5 and 6 are connected to the air conditioner outdoor units 12 and 13 installed outdoors.

FIG. 2 is a flowchart of demand control according to the first embodiment. The measurement value of the total power meter 9 is monitored (step 201), and the total power consumption value at the end of the demand time period is predicted from the monitor value (step 202). The predicted value of total power consumption and the contract power value are compared (step 20).
3) If the predicted power value is less than or equal to the contract power value, step 1
Return to. When the predicted power value is larger than the contracted power value, the set temperature change control is performed on the air conditioner that is the target of the demand control. The demand control determines the number of air conditioners to be controlled and the change frequency of the set temperature from the excess power value of the predicted power value from the contracted power value and the reduced power value per unit change frequency of the air conditioner set temperature ( Step 204). Based on the content of the determination, change control of the set temperature to the air conditioner is performed (step 205).

Next, the determination of the control content of the demand control (step 204) will be described with reference to FIGS. For simplification of explanation, it is assumed that the contracted power value is 10 KWh, the demand time period is 30 minutes, and the number of air conditioners to be controlled is three, and each of them is in the cooling operation mode. As shown in FIG. 3, when it is predicted that the total power consumption exceeds the contract power value at the end of the demand time limit, demand control is executed. The excess power is a value obtained by subtracting the contract power value from the predicted power value (here, 3K
Wh), if the reduction power value per unit change frequency (here, 1 ° C.) of the set temperature of the air conditioner is 1 KWh, it is necessary to raise the set temperature of the air conditioner by 3 ° C. in total.

As shown in FIG. 4, the set temperature and the detected room temperature of each air conditioner are 25 ° C. and 26 ° C. for the air conditioner A and 25 ° C. for the air conditioner B, respectively.
℃ and 28 ℃, air conditioner C 24 ℃ and 30 ℃. In order to change the set temperature to a total of 3 ° C, the set temperatures of the three air conditioners are evenly increased by 1 ° C. Therefore, three air conditioners are controlled, and the set temperatures are changed from 25 ° C. to 26 ° C. for the air conditioners A and B, and from 24 ° C. to 25 ° C. for the air conditioner C.

According to the first embodiment, the current power amount output from the power meter is input and the demand value at the end of the demand time period is predicted. Excess power is calculated from this predicted demand value and available power. Then, a plurality of air conditioners are divided to meet the excess power, the set temperature is uniformly determined from the state of each air conditioner previously detected by the device state monitor means, and each air conditioner is controlled through the state control means. Since the set temperature is output to, load control can be performed without impairing comfort.

Example 2. The configuration diagram of the second embodiment has the same configuration as that of the first embodiment. The determination of the contents of the demand control will be described, but the conditions and contents of the other parts are the same as those in the first embodiment, and therefore the description is omitted. The content of the demand control is determined by prioritizing the difference between the set temperature and the room temperature, and changing the set temperature as much as possible for each unit in that order. Taking the case as shown in FIG. 4 as an example, the priority order of the air conditioners is A, B, and C, which are the targets of demand control in this order. Therefore, in order to change the set temperature by a total of 3 ° C, the number of air conditioners to be controlled is two, and the set temperature is 25 ° C to 26 ° C for the air conditioner A and 25 ° C to 27 ° C for the air conditioner B. change.

According to the second embodiment, the current power amount output from the power meter is input and the demand value at the end of the demand time period is predicted. Excess power is calculated from this predicted demand value and available power. Then, a plurality of air conditioners are divided to match the excess power, the set temperatures are determined by prioritizing the states of the air conditioners detected by the device state monitor means in advance, and the set temperature is determined through the state control means. Since the set temperature is output to each air conditioner, load control can be performed without impairing comfort.

Example 3. The configuration diagram of the third embodiment has the same configuration as that of the first embodiment. Although the content determination of the demand control will be described, the other parts are the same as those in the first embodiment, and therefore the description is omitted. The content of the demand control is determined by deriving the optimum set temperature of the air conditioner from the outdoor temperature detected by the outdoor unit of a typical air conditioner, and changing the set temperature of each air conditioner equally based on the set temperature. To do. Taking the case of FIG. 5 as an example, if the optimum set temperature of the air conditioner is 4 ° C. lower than the outdoor temperature, 26 ° C. is the optimum set temperature of the air conditioner. Therefore, the set temperature is 25 ° C to 26 ° C for the air conditioners A and B, and 24 ° C to 26 ° C for the air conditioner C.
When changed to ℃, the set temperature is changed by 4 ℃. If it is necessary to change the set temperature by 6 ° C in demand control, the set temperature air conditioner B and air conditioner C
Will be changed from 26 ° C to 27 ° C. Therefore, there are 3 air conditioners to control, and the set temperature is 25 ℃ for air conditioner A.
To 26 ° C, air conditioner B from 25 ° C to 27 ° C, and air conditioner C from 24 ° C to 27 ° C.

As described above, according to the third embodiment, the current power amount output from the power meter is input and the demand value at the end of the demand time period is predicted. Excess power is calculated from this predicted demand value and available power. Then, a plurality of air conditioners are divided to meet the excess power, and the set temperature is uniformly determined from the representative outdoor temperature and the condition of each air conditioner detected by the device condition monitor means, and the condition control means is used. Since the set temperature is output to each air conditioner, load control can be performed without impairing comfort.

Example 4. The configuration diagram of the fourth embodiment has the same configuration as that of the first embodiment. Although the content determination of the demand control will be described, the conditions and content of the other parts are the same as those in the third embodiment, and therefore the description will be omitted. The content of the demand control is to derive the optimum set temperature of the air conditioner from the outdoor temperature detected by the outdoor unit of a typical air conditioner, and based on that set temperature, prioritize by the difference between the set temperature and room temperature, In that order, it is decided to change the set temperature as much as possible for each unit. Taking the case of FIG. 5 as an example, 26 ° C. is the optimum set temperature of the air conditioner. Set temperature to air conditioner A, air conditioner B
Is changed from 25 ° C. to 26 ° C., and the air conditioner C is changed from 24 ° C. to 26 ° C., it means that the set temperature of the air conditioner is changed by 4 ° C. in total. If it is necessary to change the set temperature by 6 ° C in demand control, the priority order of air conditioners is A, B, C.
In this order, demand control is performed in this order. Further, the set temperature of the air conditioner B is changed from 26 ° C to 28 ° C. Therefore, three air conditioners are controlled, and the set temperatures are changed from 25 ° C. to 26 ° C. for the air conditioner A, 25 ° C. to 28 ° C. for the air conditioner B, and 24 ° C. to 26 ° C. for the air conditioner C.

As described above, according to the fourth embodiment, the current power amount output from the power meter is input and the demand value at the end of the demand time period is predicted. Excess power is calculated from this predicted demand value and available power. Then, a plurality of air conditioners are divided to match the excess power, and the set temperature is determined by prioritizing the representative outdoor temperature and the condition of each air conditioner detected by the device condition monitoring means in advance to determine the set temperature, and the condition control is performed. Since the set temperature is output to each air conditioner via the means, load control can be performed without impairing comfort.

Example 5. The configuration diagram of the fifth embodiment has the same configuration as that of the first embodiment. Although the content determination of the demand control will be described, the other parts are the same as those in the first embodiment, and therefore the description is omitted. The contents of the demand control are determined so that the optimum set temperature of each air conditioner is derived from the outdoor temperature detected by the outdoor unit of each air conditioner, and the set temperature of each air conditioner is changed uniformly based on the set temperature. . Taking the case of FIG. 6 as an example, assuming that the optimum set temperature of the air conditioner is 4 ° C. lower than the outdoor temperature, the air conditioners A and B have 2
The optimum set temperature of the air conditioner is 5 ° C. and 26 ° C. for the air conditioner C. Therefore, when the set temperature of each air conditioner is changed to the optimum set temperature, the set temperature is changed by 2 ° C in total. If it is necessary to change the set temperature by 5 ° C by demand control, the set temperature of the air conditioner A will be 2
5 ° C to 26 ° C, air conditioners B and C from 26 ° C to 27 ° C
Will be changed to ℃. Therefore, the number of air conditioners to be controlled is three, and the set temperatures are from 25 ° C. to 2
6 ℃, change the air conditioner C from 24 ℃ to 27 ℃.

As described above, according to the fifth embodiment, the current power amount output from the power meter is input and the demand value at the end of the demand time period is predicted. Excess power is calculated from this predicted demand value and available power. Then, the plurality of air conditioners are divided to match the excess power, and the optimum set temperature of each air conditioner is determined evenly from the state of each air conditioner and the outdoor temperature detected by the device state monitor means in advance,
Since the set temperature is output to each air conditioner via the state control means, load control can be performed without impairing comfort.

Example 6. The configuration diagram of the sixth embodiment has the same configuration as that of the first embodiment. The determination of the contents of the demand control will be described, but the conditions and contents of the other parts are the same as those in the fifth embodiment, and therefore the description is omitted. The content of the demand control is to derive the optimum set temperature of each air conditioner from the outdoor temperature detected by the outdoor unit of each air conditioner, use that set temperature as a reference, and prioritize the difference between the set temperature and room temperature. In order, it is decided to change the set temperature as much as possible for each unit. Taking the case of FIG. 6 as an example, assuming that the optimum set temperature of the air conditioner is 4 ° C. lower than the outdoor temperature, the air conditioners A and B are 25 ° C. and the air conditioner C is 26 ° C. The optimum set temperature is reached. Therefore, when the set temperature of each air conditioner is changed to the optimum set temperature, the set temperature is changed by 2 ° C in total. If it is necessary to change the set temperature by 5 ° C. by the demand control, the set temperature is changed from 25 ° C. to 26 ° C. for the air conditioner A and from 25 ° C. to 27 ° C. for the air conditioner B. Therefore, there are 3 air conditioners to control, and the set temperature is 25 ° C to 26 ° C for air conditioner A.
C., the air conditioner B is changed from 25.degree. C. to 27.degree. C., and the air conditioner C is changed from 24.degree. C. to 26.degree.

As described above, according to the sixth embodiment, the current power amount output from the power meter is input and the demand value at the end of the demand time period is predicted. Excess power is calculated from this predicted demand value and available power. Then, a plurality of air conditioners are divided to match the excess power, and the optimum set temperature of each air conditioner is determined by prioritizing the condition of each air conditioner and the outdoor temperature detected by the device condition monitoring means in advance. Since the temperature is determined and the set temperature is output to each air conditioner via the state control means, load control can be performed without impairing comfort.

Example 7. The demand control device shown as the seventh embodiment has the same configuration as that of the first embodiment. FIG. 7 is a control conceptual diagram of the seventh embodiment of the present invention. In Figure 7, the air conditioner is 100
This shows the case where the units are connected. An execution pointer and a cancellation pointer are used for control. The execution pointer represents the number of the air conditioner for which the demand control will be executed next, and the release pointer represents the number of the air conditioner for which the demand control will be next released. In the case of the figure, the execution pointer is 8 and the release pointer is 2, which indicates that the air conditioner in the meantime is executing demand control.

Here, in order to simplify the explanation, the change of the set temperature is assumed to be 2 ° C. uniformly for all air conditioners. If the predicted demand is likely to exceed the contracted power, set the excess power and the set temperature to 2 ° C.
The number of units corresponding to the excess power is calculated from the reduced power per air conditioner when changed, and the execution pointer is advanced by that number. If the predicted demand has a margin, the release pointer is advanced by the number corresponding to the power.
If the resident feels discomfort in the air conditioner during demand control and operates the remote controller, the demand control is rejected and the control is removed. At this time, the release pointer is advanced.

FIG. 8 shows a control flowchart of the seventh embodiment. In FIG. 8, control is started in step 301,
In step 302, the predicted demand value is calculated. The calculation method of the predicted demand is the same as that of the first embodiment. Step 30
In 3, a comparison calculation is performed to see if the predicted demand calculated in step 302 exceeds the contracted power. If it is likely to exceed, the routine proceeds to step 304, where demand control is applied to the number of air conditioners corresponding to the excess power. The method of calculating the number of air conditioners corresponding to the excess power is the same as in the first embodiment. Further step 30
At 5, the execution point is advanced by the number of units.

If it is determined in step 303 that the contracted power is not exceeded, the process proceeds to step 306 and it is determined whether there is an air conditioner for which demand control is being executed. Whether there is an air conditioner that is executing demand control is determined by whether the execution pointer and the release pointer are the same. If there is an air conditioner under demand control, the process proceeds to step 307, and the demand for the number of air conditioners corresponding to the surplus power is released. Also here, the calculation of the number of air conditioners commensurate with the surplus power is the same as in the first embodiment. Further, in step 308, the release pointer is advanced by the number of vehicles.

If there is no air conditioner under demand control in step 306, the process proceeds to step 309. In step 309, it is determined whether there is an air conditioner that has rejected demand control.
The demand control refusal is judged by comparing the information of the operation information detecting means of each air conditioner with the content of the demand control and judging whether they are different. If it is determined in step 309 that there is an air conditioner that has rejected demand control, the process proceeds to step 310 and the demand control of the air conditioner that has rejected demand control is canceled. Further, in step 311, the release pointer is advanced by the number of units. Thereafter, the operation is repeated from step 302.

As described above, according to this embodiment, when the occupant feels uncomfortable during the demand control and the remote controller of the air conditioner operates the resident to change the set temperature by the device status monitor, the air conditioner is demand controlled. By removing it and reconfiguring the division by the division changing means,
It is possible to perform load control without impairing comfort.

Example 8. FIG. 9 is a configuration diagram of an eighth embodiment of the present invention. 1, a demand control device 1 having a display device 10 such as a monitor and a device state monitor means, a demand operation means, and an operation device 11 composed of an air conditioner control means;
3 and 4 are interface units (IF) for connecting the air conditioners 5 and 6 and the total power meter 9 to the network.
U), 7 and 8 are remote controls for operating the air conditioners 5 and 6.

FIG. 10 is a flow chart of the eighth embodiment of the present invention. In the figure, control is started in step 401, and current power consumption is calculated in step 402.
The calculation method of the power consumption is the same as that of the first embodiment. Subsequently, in step 403, it is determined by comparison calculation whether the current power consumption exceeds the contract power. If the used power exceeds the contracted power in step 403, the process proceeds to step 404. In step 404, the contract power is updated to the current power. Further, in step 405, the currently used power is displayed as the contracted power for the next month in order to notify that the contracted power is changed on the monitor screen of the demand control device. Thereafter, the operation is repeated from step 402.

FIG. 11 is a display example of the monitor screen of the demand control device. Displays that the contract power has been exceeded and the predicted contract power for the next month.

As described above, according to the eighth embodiment, when the used power exceeds the contracted power, the predicted contracted power for the next month is displayed, so that the usage status of the load can be grasped in real time. Will be easier.

[0042]

According to the demand control apparatus of the present invention, in the electric power system to which the electric power load including the air conditioner is connected, the use of electric power is restricted when the electric power used is likely to exceed the contracted electric power. In the demand control device, a device state monitoring means for detecting the operating state of the air conditioner, a power measurement value monitoring means for inputting the used power value of the current total power load, and a used power of the current and past total power loads. Power consumption predicting means for predicting power consumption after a predetermined time from, and control content determining means for determining the operation content of the air conditioner according to the excess power value from the contract power value of the predicted power value, A state control means for outputting a control content decision to the air conditioner is provided, so that the operation content of the air conditioner is determined according to the excess power, so that load control without impairing comfort can be performed. Can.

The demand control device according to claim 2 is the demand control device according to claim 1.
In the demand control device described above, an outside air temperature monitoring means for monitoring an outside air temperature detected by an outdoor unit of the air conditioner, and a representative air unit in which a change value of the set temperature of the air conditioner is predetermined. And a means for determining the outside air temperature detected by the outdoor unit of the air conditioner, so that the temperature difference between the outdoor temperature and the room temperature detected by one representative air conditioner outdoor unit is taken into consideration. This makes it possible to perform load control without impairing comfort.

The refrigeration cycle apparatus of claim 3 is the same as that of claim 3
The demand control device according to claim 1 is the demand control device according to claim 1, wherein an outside air temperature monitoring unit that monitors an outside air temperature detected by an outdoor unit of the air conditioner, and a change value of the set temperature of the air conditioner is set for each of the The air conditioner outdoor unit has a means for determining using the outside air temperature, and it is comfortable by considering the temperature difference between the outside air temperature detected by each air conditioner outdoor unit and the room temperature. The load can be controlled without impairing the property.

The demand control device according to claim 4 is the demand control device according to claim 1.
In the demand control device described, the demand control refusal determination means for comparing the operating state of the air conditioner detected from the device state monitoring means with the operating state output by the state control means to determine that the resident has rejected the demand control. And a means for changing the air conditioner for demand control based on the result of the demand control refusal determination means, load control that does not impair comfort by accepting the resident's demand control refusal by the remote control at hand It can be performed.

The demand control device according to claim 5 is the demand control device according to claim 1.
In the demand control device described, the next month forecast contract power calculation means for calculating the next month forecast contract power by comparing the power at the end of the demand time limit and the available power, and the next month forecast displaying the next month forecast contract power Since the contract power display means is provided, if the used power exceeds the contracted power, the forecasted contracted power for the next month is displayed so that the usage status of the load can be grasped in real time and the load management can be performed. It will be easier.

[Brief description of drawings]

FIG. 1 is a configuration diagram illustrating a demand control device according to first to seventh embodiments of the present invention.

FIG. 2 is a flowchart of demand control according to the first to sixth embodiments.

FIG. 3 is a diagram illustrating adjusted power values by demand control according to the first to sixth embodiments.

FIG. 4 is a diagram illustrating an operation of determining contents of demand control according to the first and second embodiments.

FIG. 5 is a diagram illustrating an operation of determining contents of demand control in the third to fourth embodiments.

FIG. 6 is a diagram illustrating an operation of determining contents of demand control according to the fifth to sixth embodiments.

FIG. 7 is an operation conceptual diagram of a division changing unit according to a seventh embodiment.

FIG. 8 is a flowchart of demand control according to the seventh embodiment.

FIG. 9 is a configuration diagram illustrating a demand device according to an eighth embodiment.

FIG. 10 is a flowchart of a display unit according to the eighth embodiment.

FIG. 11 is a display image diagram of predicted contracted power according to the eighth embodiment.

FIG. 12 is a configuration diagram showing a conventional demand control device.

[Explanation of symbols]

 1 Demand control device 2 IFU 3 IFU 4 IFU 5 Air conditioner indoor unit 6 Air conditioner indoor unit 7 Remote controller 8 Remote controller 9 Overall electricity meter 10 Display device 11 Calculation device 12 Air conditioner outdoor unit 13 Air conditioner outdoor unit 14 room 15 room 16 Temperature Detector 17 Temperature detector 18 Humidity detector 19 Humidity detector

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toyohiro Kobayashi 3-18-1 Ogashi, Shizuoka City Mitsubishi Electric Corporation Living Environment Engineering Center (72) Inventor Akinori Tsukimori 3-18-1 Oka Shizuoka Shizuoka Plant of Mitsubishi Electric Corporation

Claims (5)

[Claims] 1. A demand control device for limiting the use of electric power in a power system to which an electric power load including an air conditioner is connected, when the used electric power value is likely to exceed a contracted electric power value. Device state monitoring means for detecting the operating state of the device, power measurement value monitoring means for inputting the used power value of the current total power load, and predicting the used power after a predetermined time from the used power of the current and past total power loads Used power predicting means, control content determining means for determining the operation content of the air conditioner according to the excess power value from the contract power value of the predicted power value, and the control content determination to the air conditioner A demand control device comprising: a state control means for outputting. 2. An outside air temperature monitoring means for monitoring an outside air temperature detected by an outdoor unit of the air conditioner, and one representative air conditioner in which a change value of the set temperature of the air conditioner is predetermined. The demand control device according to claim 1, further comprising: a unit that determines the temperature of the outside air detected by the outdoor unit. 3. An outside air temperature monitoring means for monitoring an outside air temperature detected by the outdoor unit of the air conditioner, and an outside air temperature detected by each of the air conditioner outdoor units as a change value of the set temperature of the air conditioner. The demand control device according to claim 1, further comprising: 4. A demand control refusal determination means for comparing the operating state of the air conditioner detected by the equipment state monitoring means with the operating state output by the state control means to determine that the resident has rejected the demand control. The demand control device according to claim 1, further comprising: a unit that changes an air conditioner for which demand control is performed based on a result of the demand control refusal determination unit. 5. The next-month forecast contract power calculation means for calculating the next-month forecast contract power by comparing the power at the end of the demand time limit and the available power, and the next-month forecast contract power for displaying the next-month forecast contract power. The demand control device according to claim 1, further comprising a display unit.