JP5936714B2 - System controller, facility management system, demand control method and program - Google Patents

Description

  The present invention relates to a demand control technique for an air conditioner.

  Conventionally, various techniques for energy saving have been proposed for operation control of a plurality of air conditioners installed in a building or the like. For example, Patent Literature 1 calculates the total power consumption of all outdoor units at the present time, compares the calculated total power consumption with the target power consumption, obtains a required power reduction amount, and calculates the power reduction amount for each outdoor unit. Devices have been proposed that determine the amount of power saved for each outdoor unit by apportioning in proportion to the power consumption ratio of the unit.

JP 2007-218499 A

  By the way, in a multi-type air conditioner installed in a building or the like, it is known that the power consumption of the outdoor unit fluctuates momentarily due to various factors. For this reason, in the technique described in Patent Document 1 in which the power reduction amount is apportioned according to the ratio of the power consumption of each outdoor unit and the power saving amount for each outdoor unit is obtained, depending on the detection timing of the power consumption There is a possibility that an outdoor unit in which the air conditioning load is excessive or insufficient occurs and the comfort is impaired.

  The present invention has been made to solve such a problem, and provides a system controller or the like that can reliably save energy and prevent a decrease in comfort in demand control for a plurality of air conditioner outdoor units. The purpose is to do.

In order to achieve the above object, a system controller according to the present invention provides:
A target demand information storage unit for storing target demand information in which target demands for a plurality of predetermined time zones are set for each of a plurality of air conditioning outdoor units;
A power consumption collection unit that collects the power consumption of each of the air-conditioning outdoor units;
For each air conditioner outdoor unit, for each time zone, calculate the predicted power consumption in the time zone based on the corresponding power consumption, the calculated predicted power consumption, and the corresponding target demand, air conditioning load excess or deficiency conditions acquired in the previous SL calculated power margin of the air conditioner outdoor unit, each with a margin in the air-conditioning load, lack the total of all calculated in the power margin amount the air conditioning load based on the by distributing the air conditioner outdoor unit has a demand adjustment unit for executing de-demand adjustment process for adjusting the target demand corresponding to the air conditioning outdoor unit air conditioning load is excess or deficiency of at least one,
An air conditioning control unit that performs demand control based on the corresponding target demand for each of the air conditioning outdoor units.

  ADVANTAGE OF THE INVENTION According to this invention, in demand control with respect to several air-conditioning outdoor unit, while being able to achieve energy saving reliably, the fall of comfort can be prevented.

It is a figure showing the whole equipment management system composition concerning Embodiment 1 of the present invention. In Embodiment 1, it is a figure which shows the connection aspect of an electric power measurement apparatus. It is a block diagram which shows the structure of the system controller which concerns on Embodiment 1 of this invention. It is a figure which shows an example of the control management information of Embodiment 1. It is a figure which shows an example of the target demand information of Embodiment 1. 3 is a flowchart illustrating a procedure of demand adjustment processing according to the first embodiment. It is a figure which shows the memory content of the data storage part with which the system controller which concerns on Embodiment 2 of this invention is provided. It is a figure which shows an example of the load characteristic information of Embodiment 2. It is a figure which shows an example of the load change time information of Embodiment 2. It is a figure which shows an example of the latest load change information of Embodiment 2. 9 is a flowchart illustrating a procedure of a processing part for calculating a surplus power amount in the demand adjustment process according to the second embodiment. It is a figure which shows the memory content of the data storage part with which the system controller which concerns on Embodiment 3 of this invention is provided. It is a figure which shows an example of the schedule information of Embodiment 3. 14 is a flowchart illustrating a procedure of a processing part for calculating a surplus power amount in the demand adjustment process of the third embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a diagram showing an overall configuration of a facility management system according to Embodiment 1 of the present invention. This equipment management system is a system for managing the operation of an air conditioner (outdoor unit 2, indoor unit 3) installed in an office building, for example, as shown in FIG. It includes units 2a to 2c, a plurality of indoor units 3a to 3c, remote controllers 4a to 4c, and power measuring devices 7a to 7c, respectively.

  The system controller 1 and each of the outdoor units 2a to 2c are connected via the communication line 5 so that they can communicate with each other. The outdoor unit 2a and each indoor unit 3a are connected via a communication line 6a so that they can communicate with each other. The outdoor unit 2b and each indoor unit 3b are connected so as to be able to communicate with each other via a communication line 6b. Similarly, the outdoor unit 2c and each indoor unit 3c are connected to a communication line. They are connected so as to be able to communicate with each other via 6c. Although not shown, the outdoor unit 2a and each indoor unit 3a are connected by a refrigerant pipe for circulating the refrigerant. Similarly, the outdoor unit 2b and each indoor unit 3b, and the outdoor unit 2c and each indoor unit 3c are also connected by separate refrigerant pipes.

  Further, the system controller 1 is connected to the power measuring devices 7 a to 7 c via the communication line 8. As shown in FIG. 2, the power measuring devices 7 a to 7 c are connected to the power supply lines 9 a to 9 c, respectively, and calculate power values by acquiring current values and voltage values. Outdoor unit 2a-2c receives supply of electric power from electric power supply lines 9a-9c, respectively. Therefore, the power values calculated by the power measuring devices 7a to 7c respectively indicate the power consumption amounts of the outdoor units 2a to 2c. Each of the power measuring devices 7a to 7c transmits data (power consumption data) including the calculated power consumption amount to the system controller 1 at a predetermined timing (for example, every one minute).

  Each indoor unit 3 performs a driving operation based on an operation signal from the corresponding remote controller 4. Specifically, the indoor unit 3 switches the operation mode such as cooling, heating, dehumidification, and blowing in accordance with the operation signal, and performs an operation of blowing out air at a set temperature with a set air volume. Each indoor unit 3 transmits data indicating the operating state changed based on the operation signal from the corresponding remote controller 4 to the corresponding outdoor unit 2.

  When each outdoor unit 2 receives the data indicating the operation state as described above from the corresponding indoor unit 3, the outdoor unit 2 transmits the data to the system controller 1, and the source indoor unit 3 can operate in the operation state. As described above, the operating state of each part (compressor, condenser, expansion valve, evaporator, etc.) constituting the own machine is changed. Each outdoor unit 2 transmits data indicating the operation state after the change of the own unit to the system controller 1.

  Each indoor unit 3 also changes its operating state based on control data from the system controller 1 (sent via the corresponding outdoor unit 2).

  Further, in the present invention, each outdoor unit 2 is controlled by the system controller 1 so as not to exceed a preset target demand, as will be described in detail later.

  The system controller 1 comprehensively controls and manages the air conditioners (each outdoor unit 2 and each indoor unit 3). As shown in FIG. 3, the system controller 1 includes a display unit 10, an operation receiving unit 20, a first communication unit 30, a second communication unit 40, a data storage unit 50, and a control unit 60.

  The display unit 10 includes, for example, a liquid crystal display and the like, and displays various information regarding each outdoor unit 2 and each indoor unit 3 such as a user operation screen and a monitoring screen under the control of the control unit 60. I do. The operation receiving unit 20 includes, for example, a keyboard, a mouse, a keypad, a touch pad, a touch panel, and the like, receives an input operation from the user, and sends a signal related to the received input operation to the control unit 60.

  The first communication unit 30 performs communication according to a predetermined communication method with each outdoor unit 2 connected via the communication line 5. The second communication unit 40 performs data communication according to a predetermined communication method with each power measurement device 7 connected via the communication line 8.

  The data storage unit 50 includes a readable / writable nonvolatile semiconductor memory such as a flash memory, a hard disk drive, or the like. The data storage unit 50 stores information, programs, and the like for controlling each outdoor unit 2 and each indoor unit 3. Specifically, the data storage unit 50 stores air conditioner information 51 and a program 52.

  The air conditioner information 51 is information for controlling each air conditioner (each outdoor unit 2, each indoor unit 3), and includes, for example, control management information 510 and target demand information 511. As shown in FIG. 4, the control management information 510 stores records in which device addresses are associated with operating state information for the number of installed air conditioners.

  The device address is a communication address assigned to each air conditioner. The operation state information is information indicating the current operation state of the air conditioner, such as an operation mode such as operating / stopped, thermo-on / thermo-off, cooling / heating / air blowing, set temperature, set humidity, and the like.

  The target demand information 511 is information in which a target demand for each outdoor unit 2 is set. As shown in FIG. 5, the target demand information 511 associates a device address with a target demand (unit: kWh) for each time slot obtained by dividing a day by a predetermined time (in this example, 30 minutes). Records are stored for the number of outdoor units 2 installed.

  Returning to FIG. 3, the program 52 is a computer program executed by the control unit 60, and includes a power consumption collection program 520, an air conditioning control program 521, and a demand adjustment program 522.

  The power consumption collection program 520 is a program describing a program for collecting the power consumption of each outdoor unit 2.

  The air conditioning control program 521 is a program that describes normal operation control for each air conditioner (the outdoor unit 2 and the indoor unit 3). For example, the air conditioning control program 521 describes a process for displaying a monitoring screen and accepting designation of a controlled air conditioner and an operation instruction from the user via the monitoring screen. The air conditioning control program 521 describes a process for generating control data in accordance with an operation instruction received from a user and transmitting the generated control data to a designated air conditioner. In addition, the air conditioning control program 521 also includes a description of processing for demand controlling each outdoor unit 2.

  The demand adjustment program 522 is a process (demand adjustment process) for adjusting the target demand (see FIG. 5) preset for each outdoor unit 2 according to the excess or deficiency of the air conditioning load of each outdoor unit 2. It is a written program. The demand adjustment process will be described later.

  The control unit 60 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, although not shown. Functionally, the control unit 60 includes a power consumption collection unit 61, an air conditioning control unit 62, and a demand adjustment unit 63. Each of these functions of the control unit 60 is realized by the CPU executing each of the above programs stored in the data storage unit 50.

  The power consumption collection unit 61 executes processing based on the power consumption collection program 520. The power consumption collection unit 61 receives the power consumption data transmitted from each power measurement device 7 through the second communication unit 40 as described above. Then, the power consumption collecting unit 61 generates data by adding the reception time and the device address of the outdoor unit 2 corresponding to the transmission source power measuring device 7 to the received power consumption data, and the data storage unit 50 Are stored sequentially. In addition, the data which matched the outdoor unit 2 and the electric power measurement apparatus 7 shall be beforehand memorize | stored in the data storage part 50 grade | etc.,.

  The air conditioning control unit 62 executes processing based on the air conditioning control program 521. The air conditioning control unit 62 executes processing similar to that of this type of conventional system controller, for example, processing for controlling the operation of the air conditioner according to the operation instruction received from the user via the monitoring screen. In addition, when the air conditioner control unit 62 receives the data indicating the above-described operation state transmitted from the air conditioner via the first communication unit 30, the operation state corresponding to the control management information 510 based on the received data. Update the information content.

  The air conditioning control unit 62 also performs demand control for each outdoor unit 2. In the present embodiment, the air-conditioning control unit 62 determines each outdoor unit 2 in the demand time zone from the target demand information 511 at the start times of the time zones (hereinafter referred to as demand time zones) divided as described above. Read the target demand. And the air-conditioning control part 62 controls the driving capability of each outdoor unit 2 so that the power consumption of each outdoor unit 2 does not exceed each target demand. However, although the details will be described later, the target demand of each outdoor unit 2 can be appropriately adjusted by the demand adjusting unit 63 according to whether the air conditioning load of each outdoor unit 2 is excessive or insufficient. The air conditioning load refers to an amount of energy necessary for air conditioning at a target temperature set by a user or the like. For the outdoor unit 2 whose target demand is adjusted by the demand adjusting unit 63, the air conditioning control unit 62 performs demand control at the adjusted target demand in the demand time zone.

  The demand adjustment unit 63 executes processing based on the demand adjustment program 522 (demand adjustment processing). The demand adjusting unit 63 sets the target demand corresponding to each outdoor unit 2 based on the target demand information 511 and the excess / deficiency status of the air conditioning load of each outdoor unit 2 in the demand time zone for each demand time zone. adjust.

  FIG. 6 is a flowchart showing a procedure of demand adjustment processing executed by the demand adjustment unit 63. The demand adjustment process is started when a predetermined time (for example, 5 minutes) elapses from the start time of each demand time slot.

  The demand adjustment unit 63 initializes the total surplus power by setting 0 (step S101). The total surplus power amount is a power amount obtained by adding the power amount (room power amount) of the outdoor unit 2 having a surplus air conditioning load in the demand time zone.

  The demand adjustment unit 63 calculates the predicted power consumption amount in the demand time zone for each outdoor unit 2 (step S102). At this time, the demand adjustment unit 63 uses the power consumption data sent from the power measuring devices 7 at intervals of 1 minute from the start time of the demand time zone to the current time (for example, 5 minutes), The predicted power consumption of each outdoor unit 2 is calculated. Note that there is no limitation on the method of predicting the power consumption, and various known techniques can be employed.

  Next, the demand adjustment unit 63 selects one of all the outdoor units 2 (step S103), and determines whether or not the air conditioning load is insufficient for the selected outdoor unit 2 (step S104). . More specifically, the demand adjustment unit 63 compares the target demand in the demand time zone of the outdoor unit 2 set in the target demand information 511 with the previously calculated predicted power consumption of the outdoor unit 2. However, when the predicted power consumption is equal to or greater than the target demand, it is determined that the air conditioning load of the outdoor unit 2 is insufficient. On the other hand, when the predicted power consumption is smaller than the target demand, it is determined that the air conditioning load of the outdoor unit 2 is not insufficient.

  As a result of the above determination, when the air conditioning load of the selected outdoor unit 2 is insufficient (step S104; YES), the demand adjusting unit 63 temporarily stores information indicating that the air conditioning load of the outdoor unit 2 is insufficient. (Step S105).

  On the other hand, when the air conditioning load of the selected outdoor unit 2 is not insufficient (step S104; NO), the demand adjustment unit 63 determines whether there is a margin in the air conditioning load of the outdoor unit 2 (step S106). . Specifically, when the target demand is greater than a value obtained by adding a preset threshold (room threshold) to the predicted power consumption of the outdoor unit 2 calculated previously, the demand adjusting unit 63 It is determined that the air conditioning load of the machine 2 has a margin. For example, when the target demand is 3.4 kWh and the margin threshold is 0.5 kWh, when the predicted power consumption is 2.8 kWh, it is determined that the air conditioning load of the outdoor unit 2 has a margin, and the predicted power consumption When the amount is 3.0 kWh, it is determined that there is no margin in the air conditioning load of the outdoor unit 2. Note that the margin threshold is not limited to a fixed value, and can be set by any of various methods. For example, a value of 10% of the target demand may be used as the margin threshold.

  As a result of the above determination, when there is a margin in the air conditioning load of the selected outdoor unit 2 (step S106; YES), the demand adjustment unit 63 calculates a surplus power amount of the outdoor unit 2 (step S107). The marginal power amount is obtained by subtracting the predicted power consumption amount and the margin threshold value from the target demand. Then, the demand adjustment unit 63 adds the calculated marginal power amount of the outdoor unit 2 to the total marginal power amount (step S108).

  The demand adjustment unit 63 determines whether or not the air conditioning load has been confirmed for all the outdoor units 2 (step S109). When there is an outdoor unit 2 whose air conditioning load has not been confirmed (step S109; NO), the process of the demand adjustment unit 63 returns to step S103. On the other hand, when the confirmation of the air conditioning load for all the outdoor units 2 has been completed (step S109; YES), the demand adjusting unit 63 distributes the total surplus power amount to all the outdoor units 2 that have insufficient air conditioning load. (Step S110). The distribution method at this time is arbitrary. For example, it may be distributed evenly, or may be distributed according to a distribution ratio calculated based on a weight set in advance for each outdoor unit 2.

  In the case of weighting, for example, weighting may be set according to the ratio (rated ratio) of the target demand to the rated value of the outdoor unit 2. That is, the weighting is increased for the outdoor unit 2 having a larger rated ratio than others. This is because the outdoor unit 2 having a large rating ratio is highly likely to be responsible for air conditioning in an area where more comfort is emphasized.

  And the demand adjustment part 63 changes the target demand of the outdoor unit 2 which provided the surplus electric energy (step S111). That is, the demand adjustment unit 63 reduces the amount of surplus power that provides the target demand of the outdoor unit 2 that provided the surplus power. In addition, the demand adjustment unit 63 changes the target demand of the outdoor unit 2 to which the distribution of the total surplus power is provided (Step S112). That is, the demand adjustment unit 63 increases the target demand of the outdoor unit 2 to which the distribution of the total surplus power amount is provided by the provided power amount.

  As described above, according to the facility management system according to the present embodiment of the present invention, each outdoor unit 2 is operation-controlled so as to be equal to or less than a preset target demand for each demand time zone. In addition, it is possible to reliably realize energy saving in the entire equipment management system. Moreover, since the target demand is appropriately adjusted in a direction in which the excess or deficiency of the air conditioning load of each outdoor unit 2 is eliminated, it is possible to prevent a decrease in comfort.

  In the present embodiment, the above-described demand adjustment process is executed once in each demand time period, but may be executed a plurality of times. In this case, for example, it is preferable to repeatedly execute at regular time intervals (for example, 5 minutes). In this way, by adjusting the target demand multiple times in one demand time zone, the condition of the air conditioning load of each outdoor unit 2 can be reflected in the target demand more accurately, and the maintenance of comfort can be further improved. Strengthened.

  In addition, when the demand adjustment process is executed a plurality of times in one demand time period as described above, the air conditioning load is reduced in the current process for the outdoor unit 2 that provided the surplus power in the process before the previous time. When the amount is insufficient, the supplied amount of power may be collected from the outdoor unit 2 that previously provided a part or all of the surplus amount of power.

  In this way, by returning as much as possible to the original setting, it is possible to realize demand control in accordance with the purpose of setting the initial target demand.

(Embodiment 2)
Subsequently, Embodiment 2 of the present invention will be described. In addition, about the component etc. which are common in Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  FIG. 7 is a diagram showing the storage contents of the data storage unit 50 provided in the system controller 1 of the present embodiment. As can be seen from this figure, in this embodiment, in the air conditioner information 51 stored in the data storage unit 50, load characteristic information 512, load change time information 513, and latest load change information 514 are newly added. Has been.

  The load characteristic information 512 is information in which the relationship between the load level and the power consumption of the outdoor unit 2 corresponding to each indoor unit 3 is set. As shown in FIG. 8, the load characteristic information 512 includes the device address of the indoor unit 3, the load level of the indoor unit 3, the power consumption during heating of the corresponding outdoor unit 2, and the corresponding outdoor unit 2. A plurality of records in which the power consumption during cooling is associated with each other are stored.

  The load change time information 513 is information in which the time required to change the load level is set for each indoor unit 3. As shown in FIG. 9, the load change time information 513 includes the device address of the indoor unit 3, the time required for the change from the load level 3 to 2, the time required for the change from the load level 2 to 1, and the load Records in which the time required to change from level 1 to OFF (thermo OFF) and the time required to change from OF to load level 1 (that is, thermo ON) are stored for the number of indoor units 2 installed. ing. The load change time information 513 may be a fixed value set in advance, or automatically and appropriately by the air conditioning control unit 62 of the control unit 60 based on the history of the actual operation state of each indoor unit 2. It may be updated.

  In the latest load change information 514, as shown in FIG. 10, a record in which the device address of the indoor unit 3, the latest load level change content, and the change time are stored for the number of installed indoor units 2. Has been. The setting content of the latest load change information 514 is updated by the air conditioning control unit 62 every time there is a change in the load level of any indoor unit 3.

  In the present embodiment, the demand control unit 63 refers to the load characteristic information 512, the load change time information 513, and the latest load change information 514, thereby changing the load level of each indoor unit 3 and the accompanying power consumption. The amount of increase is predicted, and the target demand is adjusted in consideration of the prediction result.

  More specifically, the demand adjustment process of the present embodiment is different from the first embodiment only in the process (step S107 in FIG. 6) for calculating the surplus power amount of the outdoor unit 2 having a sufficient air conditioning load. Other processing portions are not different from those of the first embodiment. Hereinafter, the different processing parts will be described in detail.

  FIG. 11 is a flowchart illustrating a procedure of an alternative process (room power amount calculation process) in step S107 of FIG. 6 in the demand adjustment process of the present embodiment. First, the demand control unit 63 selects one of all the indoor units 3 connected to the outdoor unit 2 that has been determined that the air conditioning load has a margin in the determination of step S106 in FIG. S201).

  The demand control unit 63 refers to the latest load change information 514 and determines whether or not the current load level of the selected indoor unit 3 is thermo OFF (step S202). When the current load level of the selected indoor unit 3 is not thermo OFF (step S202; NO), the processing of the demand control unit 63 proceeds to step S209.

  On the other hand, when the current load level of the selected indoor unit 3 is thermo OFF (step S202; YES), the demand control unit 63 refers to the latest load change information 514 and acquires the time when the thermo is OFF. (Step S203). Further, the demand control unit 63 refers to the load change time information 513, acquires the time required for the change from the thermo OFF to the load level 1 (that is, the thermo ON), and obtains the next scheduled time for the thermo ON. (Step S204).

  Based on the determined scheduled time, the demand control unit 63 determines whether or not the indoor unit 3 is thermo-ON until the next demand adjustment process (step S205). If the indoor unit 3 is not turned ON by the next demand adjustment process (step S205; NO), the process of the demand control unit 63 proceeds to step S209.

  On the other hand, when the indoor unit 3 is thermo-ON by the next demand adjustment process (step S205; YES), the demand control unit 63 refers to the load characteristic information 512 and loads level 1 of the indoor unit 3 The power consumption amount of the outdoor unit 3 is acquired (step S206). Then, the demand control unit 63 increases the predicted increase in power consumption due to the indoor unit 3 being thermo-ON based on the acquired power consumption and the time from the current time to the start of the next demand adjustment process. Minute (predicted increase in electric power) is calculated (step S207). The demand control unit 63 adds the calculated predicted increase power amount to the predicted power consumption amount of the outdoor unit 2 calculated in step S102 of FIG. 6 (step S208).

  In step S209, it is determined whether or not the load level change prediction check has been completed for all the indoor units 3 connected to the outdoor unit 2. When there is an indoor unit 3 that has not been subjected to the prediction check of the load level change (step S209; NO), the process of the demand adjustment unit 63 returns to step S201. On the other hand, when the prediction confirmation of the load level change is completed for all the indoor units 3 (step S209; YES), the demand control unit 63 calculates a surplus power amount based on the predicted power consumption amount (step S209). S210). More specifically, the demand control unit 63 calculates the marginal power amount by subtracting the predicted power consumption amount and the margin threshold value from the target demand of the outdoor unit 2.

  As described above, according to the facility management system according to the present embodiment of the present invention, a change in the load level of each indoor unit 3 is predicted, and the load level may change from thermo OFF to 1 (thermo ON). If predicted, the target demand is adjusted by taking into account the power consumption that increases accordingly.

  Therefore, each outdoor unit 2 can be demand-controlled using the target demand adjusted with higher accuracy, and energy saving and comfort can be further improved.

  In the present embodiment, when there is an indoor unit 3 whose load level is predicted to change from thermo OFF to 1 (thermo ON), the predicted increase in power consumption calculated for the corresponding outdoor unit 2 is calculated. Although the power amount is increased, the change in the target load level is not limited to this. For example, even when the load level changes from 1 to 2 or from 2 to 3, the load level may be set as a processing target.

(Embodiment 3)
Subsequently, Embodiment 3 of the present invention will be described. In addition, about the component etc. which are common in Embodiment 1, 2, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  FIG. 12 is a diagram showing the storage contents of the data storage unit 50 provided in the system controller 1 of the present embodiment. In the present embodiment, unlike the second embodiment, the air conditioner information 51 stored in the data storage unit 50 includes schedule information 515 instead of the load change time information 513 and the latest load change information 514.

  The schedule information 515 is information in which the operation schedule of each indoor unit 3 is set. As illustrated in FIG. 13, the schedule information 515 stores a plurality of records in which the device address of the indoor unit 3, the operation switching time, the set temperature, the operation mode, and information indicating start or stop are associated with each other. Has been.

  The air conditioning control unit 62 of the present embodiment automatically controls the operation of the air conditioners (each outdoor unit 2 and each indoor unit 3) according to the schedule set in the schedule information 515.

  Moreover, in this embodiment, the demand control part 63 acquires the driving | running state of each indoor unit 3 with reference to the load characteristic information 512 and said schedule information 515. FIG. When there is an indoor unit 3 that is scheduled to change from stop to start, the increase in power consumption accompanying the change is predicted, and the target demand is adjusted in consideration of the prediction result. .

  More specifically, the demand adjustment process of the present embodiment is different from the first and second embodiments only in the process (step S107 in FIG. 6) for calculating the surplus power amount of the outdoor unit 2 having a sufficient air conditioning load. Other processing portions are not different from those of the first and second embodiments. Hereinafter, the different processing parts will be described in detail.

  FIG. 14 is a flowchart illustrating a procedure of an alternative process (room power amount calculation process) in step S107 of FIG. 6 in the demand adjustment process of the present embodiment. First, the demand control unit 63 selects one of all the indoor units 3 connected to the outdoor unit 2 that has been determined that the air conditioning load has a margin in the determination of step S106 in FIG. S301).

  The demand control unit 63 refers to the schedule information 515 and determines whether or not the selected indoor unit 3 is stopped (step S302). When the selected indoor unit 3 is not stopped (step S302; NO), the process of the demand control unit 63 proceeds to step S307.

  On the other hand, when the selected indoor unit 3 is stopped (step S302; YES), the demand control unit 63 obtains information related to the next operation from the schedule information 515, that is, the operation switching time, the set temperature, and the operation mode. Are acquired (step S303). And the demand control part 63 determines whether the driving | operation of the said indoor unit 3 is started by the next demand adjustment process (step S304). If the operation of the indoor unit 3 is not started by the next demand adjustment process (step S304; NO), the process of the demand control unit 63 proceeds to step S307.

  On the other hand, when the operation of the indoor unit 3 is started before the next demand adjustment process (step S304; YES), the demand control unit 63 consumes power by starting the operation of the indoor unit 3 as scheduled. A predicted increase in amount (increased predicted power amount) is calculated (step S305). For example, the demand control unit 63 calculates the increase predicted electric energy based on the setting contents of the load characteristic information 512, information (set temperature, operation mode) in the next operation acquired from the schedule information 515, and the like. Then, the demand control unit 63 adds the calculated predicted increase power amount to the predicted power consumption amount of the outdoor unit 2 calculated in step S102 of FIG. 6 (step S306).

  In step S307, it is determined whether or not the confirmation of the operation state has been completed for all the indoor units 3 connected to the outdoor unit 2. When there is an indoor unit 3 whose operation state has not been confirmed (step S307; NO), the process of the demand adjustment unit 63 returns to step S301. On the other hand, when the confirmation of the operation state is completed for all the indoor units 3 (step S307; YES), the demand control unit 63 calculates the surplus power amount of the outdoor unit 2 based on the predicted power consumption amount. (Step S308). More specifically, the demand control unit 63 calculates the marginal power amount by subtracting the predicted power consumption amount and the margin threshold value from the target demand of the outdoor unit 2.

  As described above, according to the facility management system according to the present embodiment of the present invention, a change in the operation state of each indoor unit 3 is predicted from the setting contents of the schedule information 515, and the operation state changes from stop to start. In this case, the target demand is adjusted in consideration of the power consumption that increases accordingly.

  Therefore, even when the air conditioner is operated according to the schedule, as in the second embodiment, each outdoor unit 2 can be demand-controlled using the target demand adjusted with higher accuracy, and energy saving and comfort can be achieved. Can be further improved.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said each embodiment, Of course, the various change in the range which does not deviate from the summary of this invention is possible.

  For example, regarding various information (target demand information 511, load characteristic information 512, load change time information 513, latest load change information 514, schedule information 515) used in the demand adjustment processing of the first and second embodiments, If necessary, it may be edited as appropriate via the operation accepting unit 20 or the like.

  Further, by applying each program executed by the system controller 1 to an existing personal computer (PC) or the like, the PC or the like can also function as the system controller according to the present invention.

  The distribution method of such a program is arbitrary. For example, it can be read by a computer such as a flexible disk, a CD-ROM (Compact Disk Read-Only Memory), a DVD (Digital Versatile Disk), an MO (Magneto Optical Disk), or a memory card. It may be stored and distributed on a simple recording medium. Alternatively, the program may be stored in a disk device or the like included in a server device on a communication network such as the Internet, and the program may be distributed by superimposing the program on a carrier wave via the communication network. .

  In this case, when the functions according to the present invention described above are realized by sharing an OS (Operating System) and an application program, or by cooperation between the OS and the application program, only the application program portion is stored in a recording medium or the like. May be.

  DESCRIPTION OF SYMBOLS 1 System controller, 2a-2c Outdoor unit, 3a-3c Indoor unit, 4a-4c Remote control, 5, 6a-6c, 8 Communication line, 7a-7c Power measuring device, 9a-9c Power supply line, 10 Display part, 20 Operation accepting unit, 30 first communication unit, 40 second communication unit, 50 data storage unit, 51 air conditioner information, 52 program, 60 control unit, 61 power consumption collection unit, 62 air conditioning control unit, 63 demand adjustment unit 510 control management information, 511 target demand information, 512 load characteristic information, 513 load change time information, 514 latest load change information, 515 schedule information, 520 power consumption collection program, 521 air conditioning control program, 522 demand adjustment program

Claims (7)

A target demand information storage unit for storing target demand information in which target demands for a plurality of predetermined time zones are set for each of a plurality of air conditioning outdoor units;
A power consumption collection unit that collects the power consumption of each of the air-conditioning outdoor units;
For each air conditioner outdoor unit, for each time zone, calculate the predicted power consumption in the time zone based on the corresponding power consumption, the calculated predicted power consumption, and the corresponding target demand, air conditioning load excess or deficiency conditions acquired in the previous SL calculated power margin of the air conditioner outdoor unit, each with a margin in the air-conditioning load, lack the total of all calculated in the power margin amount the air conditioning load based on the by distributing the air conditioner outdoor unit has a demand adjustment unit for executing de-demand adjustment process for adjusting the target demand corresponding to the air conditioning outdoor unit air conditioning load is excess or deficiency of at least one,
A system controller comprising: an air conditioning control unit that performs demand control on each of the air conditioning outdoor units based on the corresponding target demand.   The system controller according to claim 1, wherein the demand adjustment unit executes the demand adjustment process a plurality of times at regular time intervals in one time zone. In the demand adjustment process, the demand adjustment unit predicts a change in a future load level in the time zone of one or a plurality of air conditioner indoor units connected to an air conditioner outdoor unit having a sufficient air conditioning load, and the predicted load The system controller according to claim 1, wherein the amount of surplus power is calculated in consideration of a level change. In the demand adjustment process, the demand adjustment unit predicts a future change in the operation state of the one or more air-conditioning indoor units connected to the air-conditioning outdoor unit having a sufficient air-conditioning load, and predicted the operation The system controller according to any one of claims 1 to 3, wherein the marginal electric energy is calculated in consideration of a change in state. A facility management system comprising a system controller and a power measuring device,
The power measuring device measures the power consumption of each of the plurality of air conditioner outdoor units, and transmits the measured power consumption to the system controller through communication.
The system controller is
A communication unit that communicates with the power measuring device;
For each air conditioner outdoor unit, a target demand information storage unit that stores target demand information in which a target demand for each of a plurality of predetermined time zones is set;
A power consumption collecting unit that collects the power consumption amount of each air-conditioning outdoor unit by receiving the power consumption amount transmitted from the power measurement device via the communication unit;
For each air conditioner outdoor unit, for each time zone, calculate the predicted power consumption in the time zone based on the corresponding power consumption, the calculated predicted power consumption, and the corresponding target demand, air conditioning load excess or deficiency conditions acquired in the previous SL calculated power margin of the air conditioner outdoor unit, each with a margin in the air-conditioning load, lack the total of all calculated in the power margin amount the air conditioning load based on the by distributing the air conditioner outdoor unit has a demand adjustment unit for executing de-demand adjustment process for adjusting the target demand corresponding to the air conditioning outdoor unit air conditioning load is excess or deficiency of at least one,
An air conditioning control unit that performs demand control on each air conditioning outdoor unit based on the corresponding target demand. A power consumption collection step for collecting the power consumption of each of the plurality of outdoor units;
For each of the air-conditioning outdoor units determined in advance for each of the air-conditioning outdoor units, a predicted power consumption amount in the time period is calculated based on the corresponding power consumption amount, and the calculated predicted power consumption amount wherein the target demand, to get the excess or deficiency condition of the air-conditioning load based on the previous SL calculated power margin of the air conditioner outdoor unit, each with a margin in the air-conditioning load, all were calculated sum of the power margin amount by distributing the air conditioner outdoor unit air conditioning load is insufficient, and demand-adjustment performing at least once the de-demand adjustment process for adjusting the target demand corresponding to the air conditioning outdoor unit air conditioning load is excessive or insufficient ,
An air-conditioning control step of performing demand control for each of the air-conditioning outdoor units based on the corresponding target demand. Computer
A power consumption collector that collects the power consumption of each of the multiple air conditioner outdoor units,
For each of the air-conditioning outdoor units determined in advance for each of the air-conditioning outdoor units, a predicted power consumption amount in the time period is calculated based on the corresponding power consumption amount, and the calculated predicted power consumption amount wherein the target demand, to get the excess or deficiency condition of the air-conditioning load based on the previous SL calculated power margin of the air conditioner outdoor unit, each with a margin in the air-conditioning load, all were calculated sum of the power margin amount by distributing the air conditioner outdoor unit the air conditioning load is insufficient demand adjustment unit to perform the de-demand adjustment process for adjusting the target demand corresponding to the air conditioning outdoor unit air conditioning load is excess or deficiency of at least one,
A program that causes each air conditioning outdoor unit to function as an air conditioning control unit that performs demand control based on the corresponding target demand.

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