JP2007212038A - Demand control device, demand control method and demand control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve comfortability and followability under demand control by actualizing maximum-capacity operation of air-conditioners in an upper limit power demand. <P>SOLUTION: This demand control device 10 for demand control of the plurality of air-conditioners 20, 30 each having a current sensor 21 comprises a receiving part 12, a control part 11, and a transmitting part 13. The receiving part 12 receives information about electric power via an air conditioning control signal line 19. The control part 11 performs arithmetic processing based on the information about the electric power to generate a control signal which suppresses the operating capacity of the air-conditioners. In this arithmetic processing, it adds up the information about the electric power to acquire an added-up value and computes a power demand value corresponding to the added-up value compared with a preset upper limit demand value to generate the control signal when determining that the power demand value exceeds the upper limit demand value. The transmitting part 13 transmits the control signal via the air conditioning control signal line 19 to the air-conditioners. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a demand control apparatus, a demand control method, and a demand control program for controlling power demand.

In conventional demand control, demand control for air conditioners is performed from the viewpoint that the air conditioner is a main cause of high power demand. Among them, instead of the conventional method (for example, Japanese Patent Publication No. 53-003939) that obtains information from a power meter and calculates the total power demand, each outdoor unit is provided with a current sensor, There is known a control method in which an installed control unit autonomously suppresses and controls each outdoor unit based on the value of a current sensor (for example, Patent Document 1 and Patent Document 2).
Japanese Patent Publication No. 53-003939 JP 2002-147819 A

  However, in the above control method, since demand control is autonomously performed for each outdoor unit, even when there is no problem in the total power demand by all the air conditioners (for example, when it does not lead to contract power reduction). Then, the suppression control of the operation of the outdoor unit is performed. As a result, the air conditioner cannot be operated with the maximum capacity within the upper limit power demand, leading to a decrease in comfort and followability of the air conditioner.

  An object of the present invention is to perform an operation with the maximum capacity within an upper limit power demand for an air conditioner, and to improve the comfort and followability of the air conditioner under demand control.

  A demand control device according to a first aspect of the present invention is a demand control device that performs demand control of a plurality of air conditioners having current sensors, and includes a reception unit, a control unit, and a transmission unit. A receiving part receives the information regarding electric power via the air conditioning control signal line. A control part performs the arithmetic processing based on the information regarding electric power, and produces | generates the control signal which suppresses the driving capability of an air conditioner. In this calculation process, the control unit adds information on power to obtain a total value, compares the power demand value corresponding to the total value with a preset upper limit demand value, and the power demand value is determined to be the upper limit demand value. A control signal is generated when it is determined that the value is exceeded. The transmission unit transmits a control signal to the air conditioner via the air conditioning control signal line.

Here, suppressing the operating capacity of the air conditioner is performed, for example, by suppressing the operating frequency of the compressor of the outdoor unit, relaxing the set temperature of the indoor unit, or forcibly turning off the thermostat. Moreover, the summation of the information regarding the electric power in the arithmetic processing of a control part also includes the case where it performs predictively. The power demand value corresponding to the total value is acquired from the power value that is the value of the total value itself or the power value obtained by calculating the total value according to a regular method.
This makes it possible to determine the necessity of air conditioning suppression control after collecting and adding information related to the power of the air conditioner, so that the air conditioner can be operated at the maximum capacity within the upper limit power demand. It is possible to perform air-conditioning control that guarantees a certain level of comfort and follow-up even under a low pressure.

  The demand control device according to the second invention is the demand control device according to the first invention, wherein the information on the power is a current value or a power value. Thereby, a power demand value can be acquired more easily.

A demand control device according to a third aspect of the present invention is the demand control device of the first aspect, wherein the air conditioner has an outdoor unit and a plurality of indoor units. The demand control device also includes a storage unit that stores correspondence between information about power and first identification information for identifying the outdoor unit.
Thereby, information such as a current value and a power value for each outdoor unit can be held, and predictive demand control is also possible. That is, demand prediction is possible from the regularity of these pieces of information.

A demand control device according to a fourth aspect of the present invention is the demand control device of the third aspect, further comprising an output unit that outputs information including correspondence between the information related to the power and the first identification information to the outside.
As a result, it is possible to easily grasp which air conditioner is pushing up the demand power, and it is possible to quickly respond such as failure response or early detection of a demand control setting error.

  A demand control device according to a fifth invention is the demand control device according to the third invention, wherein the receiving unit is information relating to the power of the outdoor unit, second identification information for identifying the indoor unit, and information relating to the indoor unit. Receive indoor unit information. In the demand control apparatus, the control unit also calculates the power sharing ratio of each indoor unit based on the indoor unit information, and calculates the apportioned power value for each indoor unit from the total value of the information related to power based on the power sharing ratio. In the demand control device, the storage unit further stores a correspondence between the apportioned power value and the second identification information.

Here, the indoor unit information is, for example, a numerical value representing an operating state, a set temperature of the indoor unit, a suction temperature (a temperature sensor value provided at an air suction port of the indoor unit), a thermo ON / OFF state, and other operation states. Show. The calculation of the power sharing ratio of each indoor unit based on the indoor unit information means that, for example, in the case of cooling operation, the power sharing ratio is different for indoor units that have a higher suction temperature than the set temperature and a large difference. This means that the percentage is higher than that of the indoor unit, and the power sharing ratio of the indoor unit that is not in operation is 0%.
Thereby, the power demand for each indoor unit can be estimated, and by storing the value (apportioned power value), it can be used as information for later analysis and prediction.

A demand control device according to a sixth invention is the demand control device according to the fifth invention, and includes an output unit that outputs information including an association between the apportioned power value and the second identification information to the outside.
Thereby, the user or administrator of this demand control apparatus can grasp | ascertain an electric power demand per indoor unit. As a result, detailed analysis such as which indoor unit is a cause of high demand can be easily performed, and quick response such as failure response and early detection of setting mistakes becomes possible.

A demand control device according to a seventh aspect of the present invention is the demand control device of the first aspect, wherein the control unit acquires a sum value for each preset group of air conditioners and generates a control signal for each group. . In the demand control apparatus, the transmission unit transmits a control signal for each group.
This makes it possible to grasp the power demand value for each group, for example, for each department or each tenant, and to flexibly meet the user's needs when each of them wants to set power consumption target values and engage in energy saving activities. Yes. Since this group setting is a setting on the system, introduction and setting change are easy.

A demand control device according to an eighth aspect of the present invention is the demand control device of the third aspect, wherein the storage unit stores information on the power in a cumulative manner for a predetermined period. Further, in the demand control apparatus, when an abnormality is detected in the current sensor, the control unit obtains the power value of the outdoor unit having an abnormality in the current sensor from the information on the accumulated electric power, and performs arithmetic processing.
As a result, even when an abnormality occurs in the current sensor, appropriate demand control can be continuously performed by using the information regarding the accumulated power.

A demand control device according to a ninth aspect of the present invention is the demand control device of the eighth aspect, wherein the information on power is a power value calculated based on a sensor value of the pressure sensor.
Here, the sensor value of the pressure sensor is the pressure sensor value of the outdoor unit. The power consumption is obtained from the evaporation temperature and the condensation temperature of the refrigerant calculated from the pressure sensor value, and is used as the power value.
This makes it possible to obtain the power value and current value using means other than the current sensor, and uses information on the accumulated power based on the pressure sensor value, even when an abnormality has occurred in the current sensor. By doing so, it is possible to continue appropriate demand control.

A demand control system according to a tenth aspect includes the demand control device according to the first aspect and a plurality of air conditioners. The air conditioner has a plurality of outdoor units and a plurality of indoor units. The outdoor unit receives a control signal from the demand control device via the air conditioning control signal line. The indoor unit is controlled by each outdoor unit.
As a result, the air conditioner can be operated at the maximum capacity within the upper limit power demand, and even under demand control, it is possible to perform air conditioning control that guarantees certain comfort and followability.

A demand control method according to an eleventh aspect of the invention is a demand control method for performing demand control of a plurality of air conditioners having current sensors, and includes a reception step, a calculation step, a control step, and a transmission step. In the reception step, information related to electric power is received via the air conditioning control signal line. In the calculation step, information related to power is added to obtain a total value, and a power demand value corresponding to the total value is compared with a preset upper limit demand value. The control step generates a control signal that suppresses the operating capability of the air conditioner when it is determined that the power demand value exceeds the upper limit demand value. In the transmission step, a control signal is transmitted to the air conditioner via the air conditioning control signal line.
This makes it possible to determine the necessity of air conditioning suppression control after collecting and adding information related to the power of the air conditioner, so that the air conditioner can be operated at the maximum capacity within the upper limit power demand. It is possible to perform air-conditioning control that guarantees a certain level of comfort and follow-up even under a low pressure.

  A demand control program according to a twelfth aspect of the invention is a demand control program that performs demand control of a plurality of air conditioners having current sensors, and causes a computer to execute the first to sixth steps. In the first step, the current value or the power value acquired by the current sensor and the identification information for identifying the air conditioners previously divided into groups are received. In the second step, a group corresponding to the identification information is specified. In the third step, the current value or power value is added together in group units to calculate a combined value. In the fourth step, a power demand value corresponding to the sum value is compared with a preset upper limit demand value for each group. In the fifth step, a control signal that suppresses the operating capacity of the air conditioner is generated for the group in which the power demand value is determined to exceed the upper limit demand value in the fourth step. In the sixth step, the control signal is transmitted to the air conditioner for each group.

Here, the power value acquired by the current sensor means a power value obtained by calculating the current value according to a regular method.
Thereby, after collecting and adding information on the power of the air conditioner for each group, it is possible to determine whether or not the air-conditioning suppression control is necessary, and it is possible to perform demand control that meets the needs of the user.

In the demand control device according to the first aspect of the present invention, it is possible to judge whether or not the air conditioning suppression control is necessary after collecting and adding information on the power of the air conditioner. Driving is possible, and even under demand control, it is possible to perform air conditioning control that guarantees certain comfort and followability.
In the demand control device according to the second aspect of the invention, the power demand value can be obtained more easily by setting the information related to the power of the air conditioner to the current value or the power value.

In the demand control device according to the third aspect of the invention, information such as the current value and power value for each outdoor unit can be held, and predictive demand control is also possible. That is, demand prediction is possible from the regularity of these pieces of information.
In the demand control device according to the fourth invention, it becomes easy to grasp which air conditioner is pushing up the demand power, and it is possible to quickly respond such as failure handling or early detection of demand control setting mistakes.

In the demand control device according to the fifth aspect of the present invention, the power demand for each indoor unit can be estimated, and by storing the value (apportioned power value), it can be used as information for later analysis and prediction.
In the demand control device according to the sixth aspect of the invention, the user or administrator of this demand control device can grasp the power demand for each indoor unit. As a result, detailed analysis such as which indoor unit is the cause of high demand can be easily performed, and it is possible to quickly deal with failure and early detection of setting mistakes.

In the demand control device according to the seventh invention, it is possible to grasp the power demand value for each fixed group, for example, for each department or for each tenant, and when each of them wants to set a target value for power consumption and engage in energy saving activities, Respond flexibly to user needs. Since this group setting is a setting on the system, introduction and setting change are easy.
In the demand control device according to the eighth aspect of the present invention, even when an abnormality occurs in the current sensor, appropriate demand control can be continuously performed by using the information relating to the accumulated power.

In the demand control device according to the ninth aspect of the present invention, it becomes possible to obtain the power value and the current value by means other than the current sensor. In particular, even if an abnormality occurs in the current sensor, the power stored by other means Appropriate demand control can be continuously performed by using the information regarding.
In the demand control system according to the tenth aspect of the invention, the air conditioner can perform demand control with the maximum capacity within the upper limit power demand, and air conditioning control that guarantees constant comfort and followability even under demand control. Can be done.

In the demand control method according to the eleventh aspect of the invention, since it is possible to determine whether or not the air conditioning suppression control is necessary after collecting and adding information related to the power of the air conditioner, the maximum capacity within the upper limit power demand for the air conditioner can be determined. Driving is possible, and even under demand control, it is possible to perform air conditioning control that guarantees certain comfort and followability.
In the demand control program according to the twelfth aspect of the present invention, after collecting and adding information on the power of the air conditioner for each group, it is possible to determine whether or not the suppression control of the air conditioning is necessary, and the demand control that meets the needs of the user is performed. be able to.

FIG. 1 shows an overall configuration diagram of a demand control system 1 according to an embodiment of the present invention. The configuration of the demand control apparatus 10 is schematically shown in FIG.
<Schematic configuration of demand control system>
As shown in FIG. 1, the demand control system 1 mainly includes a demand control device 10 and a plurality of air conditioners 20 and 30 connected by an air conditioning control signal line 19. Each of the air conditioners 20 and 30 includes a plurality of outdoor units 20 and a plurality of indoor units 30 connected to each outdoor unit 20 by a refrigerant circuit or the like. The air conditioning control signal line 19 transmits an air conditioning control signal from the demand control device 10 to the outdoor unit 20 group, and also relates to the current value and other air conditioners 20 and 30 group from the outdoor unit 20 group to the demand control unit 10. Send information (operation data, etc.). The demand control device 10 generates and transmits a signal for air conditioning control for the outdoor unit 20 based on the received current value.

Reference numeral 50 denotes a power source. The power supply 50 is connected to the demand control device 10 and the outdoor unit 20 group via a power meter 40 through a power supply line.
<Schematic configuration of demand control device>
As shown in FIG. 2, the demand control device 10 is a computer that includes a CPU 11 that is a control unit, a reception unit 12, a transmission unit 13, a display unit 14, a storage unit 15, and the like.

  The CPU 11 is a control unit of the demand control device 10 and performs calculation / control processing for demand control according to a predetermined program (described later) stored in a ROM or the like. The receiving unit 12 receives information such as a current value from the outdoor unit 20 group via the air conditioning control signal line 19. The transmission unit 13 transmits the control signal generated by the CPU 11 to the outdoor unit 20 via the air conditioning control signal line 19.

The storage unit 15 includes an internal memory such as a RAM and a ROM and an external memory such as a hard disk. As will be described later, the storage unit 15 stores information in which identification information of each outdoor unit 20 is associated with a current value. The storage unit 15 stores a demand control program 16. As will be described later, the demand control program 16 is a program for executing a demand control process by the demand control system 1 of the present embodiment.
Although not shown, the display unit 14 is a screen such as a liquid crystal display, and is provided so that the user can easily recognize the content of information. For example, information that associates the identification information of each outdoor unit 20 with the current value is displayed in a table, graph, or the like.

<Schematic configuration of outdoor unit and indoor unit>
Each outdoor unit 20 has a current sensor 21. The current sensor 21 measures a current value at a constant time interval. The current value is transmitted as data to the demand control device 10 via the air conditioning control signal line 19.

<Processing operation of demand control system>
The flow of processing by the demand control system 1 of the first embodiment will be described along the flowchart of FIG.
In step S <b> 101, the identification information of the outdoor unit 20 and the corresponding current value are received via the air conditioning control signal line 19. Specifically, the receiving unit 12 receives the current value measured by the current sensor 21 for each outdoor unit 20.

In step S102, the CPU 11 sums up the current values received in step S101, calculates the summed current value into a power value according to a standard method, and sets this as a power demand value.
In step S103, the display unit 14 displays the current value of each outdoor unit 20, the combined power demand, and the like. Note that this display is not always performed and may be arbitrarily performed by a user or an administrator.

In step S <b> 104, the CPU 11 determines whether the power demand value exceeds a preset upper limit demand value. If it is determined that the value exceeds the value, the process proceeds to step S105. If it is determined that the value does not exceed the value, the process ends.
In step S105, when it is determined in step S104 that the power demand value exceeds the upper limit demand value, the CPU 11 generates a control signal that suppresses the driving ability of the outdoor unit 20 group. The operation capacity of the outdoor unit 20 group is suppressed by, for example, suppressing the operation frequency of a compressor (not shown) provided in the outdoor unit 20 (its upper limit frequency is 100%, 70%, 40%, 0%). This is performed by, for example, generating a command signal for relaxing the set temperature of the indoor unit 30 or forcibly setting the thermo-OFF state.
In step S <b> 106, the transmission unit 13 transmits the control signal generated by the CPU 11 to the outdoor unit 20 via the air conditioning control signal line 19.
In addition, there is the following formula as one of the regular methods for obtaining the power value from the current value.
Power value (W) = √3 × V × I × cos θ (I = current value (line current), V = line voltage,
cosθ = power factor)

<Features of demand control system according to embodiment>
(1)
In the demand control system 1 according to the present embodiment, since the current values of the air conditioners 20 and 30 group are collected and added, it is possible to determine whether or not the air conditioning suppression control is necessary. It is possible to operate at the maximum capacity within the power demand, and to perform air conditioning control that guarantees a certain level of comfort and followability even under demand control.

(2)
In the demand control system 1 according to the present embodiment, the storage unit 15 of the demand control device 10 stores information in which the identification information of each outdoor unit 20 is associated with the current value. And power value data can be held, and predictive demand control is also possible. That is, demand prediction can be performed along the regularity of these data.

(3)
In the demand control system 1 according to the present embodiment, the display unit 14 of the demand control device 10 can display information in which the identification information of each outdoor unit 20 is associated with the current value. Makes it easy to grasp which air conditioner is pushing up demand power, and can respond quickly, such as responding to failures and early detection of demand control setting errors.

<First Modification>
In the above embodiment, demand control is performed for all the outdoor unit 20 groups. Alternatively, the outdoor unit 20 group may be divided into a predetermined number of groups, and demand control may be performed for each group.
As shown in FIG. 4, in the demand control system 1, the outdoor unit group 20 is divided into a predetermined number (three in the present embodiment) of groups Gr1 to Gr3 in advance. Here, to divide into groups means to be divided into groups on the system so that demand control is performed for each group. Therefore, the outdoor unit group Gr1 is not necessarily physically separated from the other outdoor unit groups Gr2, 3 in the building or the like.

  In this case, in the storage unit 15, in addition to the information that associates the identification information of each outdoor unit 20 with the current value, information that associates the identification information of each outdoor unit 20 with the identification information of the group to which the outdoor unit 20 belongs is stored in a database. It manages and memorizes by etc. Further, as shown in the table of FIG. 5, the display unit 14 displays the current value of each outdoor unit 20, the power demand value for each group of the outdoor units 20, and the like by a database view display or the like.

The flow of processing according to the first modification will be described with reference to the flowchart of FIG.
In step S <b> 201, the identification information of the outdoor unit 20 and the corresponding current value are received via the air conditioning control signal line 19. Specifically, the receiving unit 12 receives the current value measured by the current sensor 21 for each outdoor unit.
In step S202, group information corresponding to the identification information is acquired. Specifically, the group is specified from the association between the group information stored in advance in the storage unit 15 and the identification information of the outdoor unit 20.

In step S203, the CPU 11 adds up the current values received in step S201 for each group, calculates a power value from the added current value according to a standard method, and sets this as a power demand value of the group.
In step S204, the display unit 14 displays the current value of each outdoor unit, the power demand for each group of outdoor units, and the like (for example, FIG. 5).

In step S205, the CPU 11 performs a process of determining whether the power demand value exceeds the preset upper limit demand value for each group. If so, the process proceeds to step S206, and if not, the process ends.
In step S206, for the group in which the power demand value is determined to exceed the preset upper limit demand value in step S205, the CPU 11 generates a control signal that suppresses the driving capability of the outdoor unit 20 belonging to the group. To do.

In step S <b> 207, the transmission unit 13 transmits the generated control signal to the outdoor unit 20 via the air conditioning control signal line 19.
In this system, even within the range of common demand control (for example, in the same building), for example, the demand value can be grasped for each department or each tenant, and the power consumption target value for each department or each tenant It is possible to flexibly respond to needs such as wanting to work on energy conservation activities. Since this is a group setting on the system, introduction and change design are easy.

<Second Modification>
In the above-described embodiment, the current values measured by the power sensor 21 are summed, a power demand value is calculated from the sum value, and is compared with the upper limit demand value. The total value of the current values can be further divided by the power sharing ratio for each indoor unit 30, and the current value for each indoor unit 30 can be estimated. This power sharing ratio is calculated, for example, according to information related to each indoor unit 30 (operation status (ON or OFF), set temperature of the indoor unit, suction temperature, thermo ON / OFF state, etc.). For example, in the case of the cooling operation, for the indoor unit 30 in which the suction temperature is higher than the set temperature and the difference is large, the power sharing ratio is set higher than other indoor units, and the power sharing of the indoor units that are not in operation The ratio is set to 0%.

The total value is apportioned according to the electric power sharing ratio of each indoor unit 30, and the estimated electric power value (apportioned electric power value) of each indoor unit 30 is obtained. This power value is displayed by the display unit 14 together with the identification information of the indoor unit 30. This display method may be a table, or may indicate the estimated power value of each indoor unit 30 along the indoor layout as shown in FIG.
In this system, the user or the administrator can grasp the power value for each indoor unit 30, so that it is possible to easily analyze the cause of the high demand. Moreover, when the estimated electric power value of a specific indoor unit 30 shows an abnormal numerical value, it can be determined immediately as a failure and dealt with immediately.

Note that this power sharing ratio may be calculated from the storage unit 15 or may be calculated each time. Further, the estimated power value can be periodically calculated and stored in the storage unit 15 or the like for a certain period, and used for demand prediction.
Moreover, the indoor unit 30 group can be divided into a predetermined number of groups, identification information of each group can be set, and the estimated power value can be added together for each group. In that case, a power demand value can be displayed for each indoor unit group.

<Other variations>
(A)
In the above embodiment, a determination process is performed to determine whether or not the sum value exceeds the upper limit demand value each time as an instantaneous value. Instead of this, for example, the accumulated value is accumulated for a predetermined time, and by extrapolating the value, an integrated value within the demand time period (proportional to the demand power) is predicted, and this predicted value is determined in the determination process. Can be targeted.

(B)
The current value or power value obtained in the above embodiment is stored in advance in the storage unit 15 for a predetermined period (for example, for one month) and used as a substitute value when the power sensor 21 fails. Also good. As a result, even if the current value of the instantaneous value cannot be obtained by the power sensor 21, demand control can be performed by using the alternative value.

(C)
Each power value is not limited to that based on the current value measured by the current sensor 21. For example, it is known that the following relationship holds between the value of the pressure sensor (not shown) of the outdoor unit 20, the evaporation temperature, and the condensation temperature (for example, Patent Document 2).
Refrigerant equivalent saturation temperature at a detected value with a high pressure sensor = Refrigerant condensation temperature Refrigerant equivalent saturation temperature at a detected value with a low pressure sensor = Refrigerant evaporation temperature Refrigerant condensation temperature is T _C , Refrigerant evaporation temperature is T _E, and the power consumption of the motor and W _i,
W _i = R (1) + R (2) T _C + R (3) T _E + R (4) T _C ² + R (5) T _C T _E
+ R (6) T _E ²
R (i), i = 1 to 6 are coefficients.
The relationship holds. Thus, it is also possible to convert into an electric power value using a pressure sensor value.

In addition, the use of this alternative value can be set so that only the outdoor unit 20 in which the power sensor 21 is abnormal is targeted, and the outdoor unit 20 having another normal power sensor 21 is not targeted.
In addition, as a method of detecting a failure, it can be detected by an abnormality of a displayed value.
(D)
In the above embodiment, when it is determined that the power demand value exceeds the upper limit demand value, a control signal for suppressing the driving ability is transmitted to all the outdoor unit 20 groups. The control signal may be transmitted only to some of the outdoor units 20 using information in which the information and the current value are associated with each other. For example, it is possible to process only the outdoor unit 20 having a certain current value or more. Conversely, some of the outdoor units 20 can be removed from the target of demand control in advance in consideration of the usage status and environment.

(E)
The demand control system 1 according to the above embodiment may be one in which the demand control device 10 is remotely located and operated via a public network such as the Internet.
(F)
In the embodiment and the modification, information relating power (such as current value) and identification information of the outdoor unit 20 are associated with each other, or estimated power value (proportional power value) and identification information of the indoor unit 30 are associated with each other. The attached information or the like is stored, but only a predetermined amount of them may be stored. For example, such information may be stored only when a specific condition is satisfied, for example, when a control command for suppressing driving ability is transmitted, or when a combined value such as a current value becomes maximum. Thereby, the memory capacity can be saved.

  The demand control system according to the present invention operates with the maximum capacity within the upper limit power demand for the air conditioner, and is effective for performing air-conditioning control that guarantees constant comfort and followability even under demand control. Is.

1 is an overall configuration diagram of a demand control system according to an embodiment of the present invention. The schematic block diagram of the demand control apparatus which concerns on embodiment of this invention. The flowchart which shows the flow of a process of the demand control system which concerns on embodiment of this invention. The whole block diagram of the demand control system which concerns on the 1st modification of embodiment of this invention. The figure which shows an example of the display by the display part of the demand control apparatus by the 1st modification. The flowchart which shows the flow of a process of the demand control system by the 1st modification. The figure which shows the display mode of the estimated electric power value of each indoor unit computed by the 2nd modification of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Demand control system 10 Demand control apparatus 11 CPU (control part)
DESCRIPTION OF SYMBOLS 12 Reception part 13 Transmission part 14 Display part 15 Memory | storage part 16 Demand control program 19 Signal line for air-conditioning control 20 Outdoor unit (air conditioner)
21 Current sensor 30 Indoor unit (air conditioner)
40 Power meter 50 Power supply

Claims (12)

A demand control device (10) for performing demand control of a plurality of air conditioners (20, 30) having a current sensor (21),
A receiving unit (12) for receiving information about electric power via the air conditioning control signal line (19);
A control unit (11) that performs a calculation process based on the information about the power and generates a control signal that suppresses the driving ability of the air conditioner (20, 30);
A transmission unit (13) for transmitting the control signal to the air conditioner (20, 30) via the air conditioning control signal line (19),
In the calculation process, the control unit (11) adds the information on the power to obtain a total value, compares the power demand value corresponding to the total value with a preset upper limit demand value, Generating the control signal when determining that the power demand value exceeds the upper limit demand value;
Demand control device. The information on the power is a current value or a power value.
The demand control apparatus according to claim 1. The air conditioner (20, 30) includes an outdoor unit (20) and a plurality of indoor units (30),
A storage unit (15) for storing an association between the information about the power and the first identification information for identifying the outdoor unit (20);
The demand control device according to claim 1, further comprising: An output unit (14) for outputting information including the correspondence between the information on the power and the first identification information to the outside;
The demand control device according to claim 3, further comprising: The receiving unit (12) includes information on the power of the outdoor unit (20), second identification information for identifying the indoor unit (30), and indoor unit information that is information on the indoor unit (30). Receive
The control unit (11) calculates a power sharing ratio of each of the indoor units (30) based on the indoor unit information, and an apportioned power value for each indoor unit (30) from the total value by the power sharing ratio. ,
The storage unit (15) stores an association between the apportioned power value and the second identification information.
The demand control apparatus according to claim 3. An output unit (14) for outputting information including the association between the apportioned power value and the second identification information to the outside;
The demand control device according to claim 5, further comprising: The control unit (11) acquires the sum value for each group of the air conditioners (20, 30) set in advance, generates the control signal for each group,
The transmitter (13) transmits the control signal for each group.
The demand control apparatus according to claim 1. The storage unit (15) stores information on the power in a cumulative manner for a predetermined period of time,
When an abnormality is detected in the current sensor, the control unit (11) acquires an electric power value of the outdoor unit (20) having an abnormality in the current sensor from information on the accumulated electric power, and performs the calculation process. Do,
The demand control apparatus according to claim 3. The information on the power is a power value calculated based on the sensor value of the pressure sensor.
The demand control apparatus according to claim 8. A demand control device (10) according to claim 1;
A plurality of air conditioners (20, 30),
The air conditioner (20, 30) includes a plurality of outdoor units (20) that receive the control signal from the demand control device (10) via the air conditioning control signal line (19), and each of the outdoor units. A plurality of indoor units (30) controlled by (20),
Demand control system. A demand control method for performing demand control of a plurality of air conditioners (20, 30) having a current sensor (21),
A receiving step of receiving information about power via the air conditioning control signal line (19);
An operation step of adding information related to the power to obtain a combined value, and comparing and calculating a power demand value corresponding to the combined value and a preset upper limit demand value;
A control step of generating a control signal for suppressing the operating capacity of the air conditioner (20, 30) when it is determined that the power demand value exceeds the upper limit demand value;
A transmission step of transmitting the control signal to the air conditioner (20, 30) via the air conditioning control signal line (19);
A demand control method comprising: A demand control program (16) for performing demand control of a plurality of air conditioners (20, 30) having a current sensor,
A first step of receiving a current value or a power value acquired by the current sensor (21) and identification information for identifying the air conditioners (20, 30) divided into groups in advance;
A second step of identifying the group corresponding to the identification information;
A third step of calculating the sum value by summing the current value or the power value in the group unit;
A fourth step of comparing and calculating a power demand value corresponding to the total value and a preset upper limit demand value for each group;
A fifth step of generating a control signal for suppressing the operating capacity of the air conditioner (20, 30) for the group in which the power demand value is determined to exceed the upper limit demand value in the fourth step;
A sixth step of transmitting the control signal to the air conditioner (20, 30) for each of the groups;
Demand control program that causes a computer to execute.

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