JP5773727B2 - Air conditioning compressor power centralized monitoring feedback control device, air conditioning equipment, and air conditioning equipment control method - Google Patents

Description

  The present invention relates to an air conditioning compressor power amount centralized monitoring feedback control device, an air conditioning facility, and an air conditioning facility control method in a packaged air conditioner type air conditioning facility for buildings.

In recent years, as air conditioning equipment for buildings, many air conditioners in which one refrigerant system is composed of about 10 indoor units and one outdoor unit are distributed in a building or the like, and these are controlled by a centralized monitoring device. Building packaged air-conditioning air-conditioning systems for buildings are in widespread use.
In such an air conditioner, as a technique for performing energy saving management for each section, Patent Document 1 discloses that a centralized monitoring device monitors demand by an overall demand monitoring unit and determines that the overall demand exceeds a target level. In addition, a system is disclosed in which a lower target level is set for an air conditioner in a section with a large demand, and the air conditioner for each section is controlled so as not to exceed the transmitted target level.

  Here, for power management in the conventional packaged air conditioner type air conditioning equipment for buildings, one control command such as stop or air blow mode is transmitted from the centralized monitoring device to the indoor unit, and indirectly from the indoor unit to the outdoor There was a method for stopping the compressor of the compressor, and another method was to stop the compressor by transmitting a stop control command directly from the centralized monitoring device to the outdoor unit. In these power management, the purpose of stopping the compressor of the outdoor unit (outdoor unit compressor) is that the outdoor unit compressor accounts for most of the power consumption of the packaged air conditioner type air conditioner (for example, about 90%). is there. This is because the compressor of the outdoor unit requires large compression power in order to send the high-pressure refrigerant to all the indoor units connected by the refrigerant pipe.

  One conventional power management method, a method for suppressing power consumption of an air conditioner by a control command to an indoor unit, is to decelerate or stop the outdoor unit compressor via a temperature control algorithm of the indoor unit. Is. If a stop command or a blow mode command is sent from the centralized monitoring device to the indoor unit, the indoor unit issues a stop command to the outdoor unit, so the compressor is forcibly stopped, so the power consumption is almost zero. About each outdoor unit compressor, although it may not want to suppress electric power so that it stops completely from the importance of the area to be air-conditioned, it becomes a simple stop. In addition, if you do not want to completely stop the compressor, there is a means to change the setting temperature from the centralized monitoring device to the direction of lowering the air conditioning capacity to each indoor unit, but by the temperature adjustment algorithm of the indoor unit by changing the setting temperature, It only issues a compressor deceleration request to the outdoor unit. Since the outdoor unit does not necessarily comply with the demand of the indoor unit 100%, the change in the set temperature of the indoor unit is not quantitatively related to the rotation speed of the compressor. In other words, through the temperature control algorithm of the indoor unit, the effect is indirect and it is difficult to control the power consumption optimally and precisely. In other words, the method using an indoor unit is either a primitive stop forcibly stopped or an indirect route via a temperature control algorithm, and precise power control cannot be performed.

  As another conventional method, a method of issuing a forced stop command directly to the outdoor unit from a centralized monitoring apparatus has been proposed (see Patent Document 2). In general, in packaged air conditioners, the rotational speed of the outdoor unit compressor is controlled by an indoor unit temperature control algorithm, but this method ignores the control algorithm and issues a forced stop command directly to the outdoor unit. . Therefore, the compressor rotational speed is not quantitatively controlled, and the outdoor unit compressor is completely stopped from the beginning, so that precise power control by controlling the rotational speed of the compressor cannot be performed. As a result, precise power suppression based on the target power suppression amount for each air conditioner cannot be achieved, and if the number of outdoor units to be stopped is small, the power suppression amount will be significantly insufficient, or conversely, if there are many units to be forcibly stopped, excessively Too much power suppression. Normally, an excessive number of units are forcibly stopped on the safety side, so that the room temperature frequently becomes unpleasant in the forcedly stopped air conditioning section.

  In addition, as is common to both conventional methods, in general air conditioning equipment, even if a wattmeter is installed to measure the power consumption of the entire air conditioning equipment, the power consumption of each outdoor unit is measured. There is also a problem that a wattmeter is not installed. For this reason, the centralized monitoring device cannot quantitatively determine which outdoor unit compressor power consumption should be suppressed.

  That is, with any of the conventional methods, the central monitoring device cannot directly and precisely control the power of individual outdoor unit compressors that occupy most of the power consumption of the air conditioner. The optimum power suppression amount for each machine could not be calculated according to the importance of each machine.

  Here, as a technique for suppressing power consumption by directly controlling an outdoor unit, Patent Document 2 discloses that a centralized monitoring apparatus can perform demand control for reducing power consumption in units of outdoor units, and implement demand control. What is configured to be able to set the time zone to be disclosed is disclosed.

JP 2009-115392 A JP 2000-186844 A

  However, in the technique disclosed in Patent Document 2, the centralized monitoring apparatus directly controls the outdoor unit, but only sets a time zone for demand control that suppresses power consumption. The optimal control of power consumption is not always performed in the time zone.

  The present invention has been made in view of such circumstances, and considers the power consumption of an air conditioning facility including a plurality of air conditioners with higher accuracy in consideration of the importance of air conditioning for each air conditioner. To provide an air conditioning compressor power centralized monitoring feedback control device, air conditioning equipment, and air conditioning equipment control method that quantitatively control only the suppression target value and maintain comfortable air conditioning while avoiding unnecessary forced stops. Objective.

  In order to solve the above problems, the air conditioning compressor power amount centralized monitoring feedback control device, air conditioning equipment, and air conditioning equipment control method of the present invention employ the following means.

  That is, the air conditioning compressor power amount centralized monitoring feedback control apparatus according to the present invention includes a plurality of air conditioners including one outdoor unit and a plurality of indoor units connected to the outdoor unit through refrigerant piping. An air conditioning compressor power amount centralized monitoring feedback control device for controlling air conditioning equipment, and calculating an appropriate value of the amount of power consumed by the compressor of each outdoor unit at predetermined time intervals, and directly Control means for performing feedback control using a compressor power consumption suppression command transmitted for each outdoor unit as an operation amount and a total power consumption which is a total amount of power consumption of the plurality of air conditioners as a controlled amount.

  As described above, the present invention calculates the suppression amount of power consumed by the compressor of each outdoor unit in consideration of the importance of air conditioning for each air conditioner, and quantitatively determines the power suppression command for each outdoor unit. In other words, it is not a simple command such as a stop command, a blow command, or a set temperature change, but is transmitted as a control operation amount, and feedback control using the total power consumption that is the total power consumption of a plurality of air conditioners as the controlled amount I do.

  According to the present invention, the air-conditioning compressor power amount centralized monitoring feedback control device is a centralized monitoring device, and includes one outdoor unit and a plurality of indoor units connected to the outdoor unit through refrigerant piping. Control multiple air conditioners. Such a plurality of air conditioners and centralized monitoring devices constitute an air conditioning facility, and the air conditioning facility is provided in, for example, a building or a factory.

The compressor of the outdoor unit occupies most (for example, about 90%) of the power consumption of the air conditioner. Therefore, in order to suppress the power consumption of the air conditioner, it is considered that it is more effective to directly control the operation amount to the compressor of the outdoor unit than to control the operation amount to the indoor unit. .
Therefore, the control means provided in the air conditioning compressor power amount centralized monitoring feedback control device uses the power suppression command indicating the suppression amount of power consumed by each outdoor unit as the operation amount, and is the total power consumption of the plurality of air conditioners. Feedback control is performed using the total power consumption as the controlled amount. The power suppression command is transmitted from the air conditioning compressor power amount centralized monitoring feedback control device for each outdoor unit, and the outdoor unit drives the compressor according to the received power suppression command.

  As described above, according to the present invention, the amount of power suppression is apportioned for each outdoor unit according to the total power consumption of the plurality of air conditioners by the feedback control. It is possible to control the power consumption of an air conditioning facility equipped with a plurality of air conditioners. Further, according to the present invention, since the power consumption of the outdoor unit is gradually reduced by the feedback control, the air conditioner is stopped by a primitive means such as forcibly stopping the outdoor unit to suppress power consumption. There is no. Therefore, since the present invention does not cause a sudden change in air conditioning, the air conditioning feeling does not greatly deteriorate.

  Moreover, the air-conditioning compressor power amount centralized monitoring feedback control device of the present invention calculates a group operation amount that is the sum of each operation amount of the indoor unit for each air conditioner, and is a sum of a plurality of the group operation amounts. The compressor power consumption for each compressor of each outdoor unit based on the result of multiplying the total facility operation amount by the group operation amount and the suppression amount of the total power consumption of the entire air conditioning facility An appropriate value for the suppression command may be calculated.

According to the present invention, the group operation amount that is the sum of the operation amounts of the indoor units is calculated for each air conditioner. The operation amount of the indoor unit is an energy relative usage amount between the indoor units determined from the operation time of each indoor unit, the temperature difference between the set temperature and the indoor temperature, and the capacity of the indoor unit.
And the total amount of power consumption of the entire air conditioning equipment is divided by the group operating amount for each air conditioner divided by the group operating amount for each air conditioner. Is multiplied. Based on the multiplication result, a power suppression command for each outdoor unit is calculated. The amount of suppression of the total power consumption of the entire air conditioning equipment is the difference between the actual total power consumption and the target value of the total power consumption. By reducing the target value, the power consumption is suppressed. .

  As described above, according to the present invention, since the compressor power consumption suppression command to each outdoor unit is calculated according to the operation amount of each indoor unit, the air conditioning equipment according to the operating state of the indoor unit is calculated. Power consumption can be controlled.

  In addition, the air conditioning compressor power amount centralized monitoring feedback control apparatus of the present invention receives an estimated value of power consumption for each compressor of the outdoor unit from the outdoor unit, and calculates a sum of the estimated values of a plurality of the outdoor units. Based on the result of multiplying the estimated value for each outdoor unit by the amount of suppression of the total power consumption of the entire air conditioning equipment, the compressor power consumption suppression command for each compressor of each outdoor unit An appropriate value may be calculated.

According to the present invention, the control means receives an estimated value of power consumption for each outdoor unit from each outdoor unit. That is, each outdoor unit estimates its own power consumption and transmits it to the air conditioning compressor power amount centralized monitoring feedback control device.
Then, the sum of the estimated values of the compressors of the plurality of outdoor units is apportioned by the estimated value of the compressor for each outdoor unit, that is, a value obtained by dividing the sum is multiplied by the suppression amount of the total power consumption of the entire air conditioning equipment. Based on the multiplication result, a power suppression command for each outdoor unit is calculated.

  As described above, the present invention calculates the compressor power consumption suppression command for each outdoor unit according to the estimated value of power consumption for each outdoor unit, so that it corresponds to the operating state of the outdoor unit. The power consumption of the air conditioning equipment can be controlled.

  In addition, the air conditioning compressor power amount centralized monitoring feedback control device of the present invention weights according to its own judgment when calculating each appropriate value of the compressor power consumption suppression command transmitted to each compressor of each outdoor unit. May be.

  According to the present invention, by weighting the compressor power consumption suppression command transmitted for each outdoor unit, for example, an air conditioning section in which a change in room temperature due to suppression is desired to be smaller, or a large change in room temperature is permitted. It is possible to control the power consumption of the air conditioning equipment corresponding to the air conditioning section.

  In addition, the air-conditioning compressor power centralized monitoring feedback control apparatus of the present invention does not require the outdoor unit whose operation is stopped to be a target for suppressing power consumption when calculating each appropriate value of the compressor power consumption suppression command. Also good.

  According to the present invention, even if an outdoor unit whose operation has already been stopped is added as a target for suppressing power consumption, it does not lead to a reduction in total power consumption. Thus, it is possible to control the power consumption of the air conditioning equipment quantitatively close to the suppression target value with higher accuracy.

  In addition, the air conditioning compressor power amount centralized monitoring feedback control apparatus according to the present invention does not require the predetermined outdoor unit to be a power consumption suppression target when calculating the appropriate values of the compressor power consumption suppression command. Good.

  According to the present invention, for example, an outdoor unit connected to an indoor unit installed in a reception room, a server room, or the like can be set as a predetermined outdoor unit and can be excluded from the power consumption suppression target. Even if the feedback control according to the invention is performed, it is possible to prevent a temperature change in a room that requires temperature management.

  On the other hand, an air conditioner according to the present invention includes a plurality of air conditioners including one outdoor unit and a plurality of indoor units connected to the outdoor unit through refrigerant piping, and a plurality of the air conditioners. The air conditioning compressor power amount centralized monitoring feedback control device described above to be controlled.

  Furthermore, the air-conditioning equipment control method which concerns on this invention controls the several air conditioner provided with one outdoor unit and several indoor units connected to this outdoor unit via refrigerant | coolant piping. The amount of power consumed by the outdoor unit is indicated, and a power suppression command transmitted to the outdoor unit is used as an operation amount, and the total power consumption, which is the total amount of power consumed by the plurality of air conditioners, is received. Performs feedback control using the controlled variable.

  According to the present invention, there is an excellent effect of controlling the power consumption of an air conditioning facility including a plurality of air conditioners with higher accuracy.

It is the figure which showed the whole structure of the air-conditioning equipment which concerns on 1st Embodiment of this invention. It is a functional block diagram which shows the structure which concerns on the feedback control of the air conditioning equipment which concerns on 1st Embodiment of this invention. It is a functional block diagram which shows the structure which concerns on the feedback control of the air conditioning equipment which concerns on 2nd Embodiment of this invention.

  Hereinafter, an embodiment of an air conditioning compressor power amount centralized monitoring feedback control device, an air conditioning facility, and an air conditioning facility control method according to the present invention will be described with reference to the drawings.

[First Embodiment]
The first embodiment of the present invention will be described below.

FIG. 1 is a diagram illustrating an overall configuration of an air conditioning equipment 10 according to the first embodiment.
The air conditioning facility 10 is a packaged air conditioner type air conditioning facility for buildings, and includes a plurality of air conditioners including one outdoor unit 12 and a plurality of indoor units 16 connected to the outdoor unit 12 via a refrigerant pipe 14. 18 and a centralized monitoring device 20 that controls the plurality of air conditioners 18. The numbers of the outdoor units 12 and the indoor units 16 shown in FIG. 1 are examples, and the number of the indoor units 16 connected to each outdoor unit 12 may be different.

  The air conditioner 10 according to the first embodiment is, for example, a package air conditioner type air conditioner for buildings provided in a building 22, and several tens to several hundreds of indoor units 16 are installed on the ceiling behind each floor. Several tens of outdoor units 12 are installed on the rooftop or the like. Then, about 10 indoor units 16 and one outdoor unit 12 form one refrigerant system to form an air conditioner 18, which is distributed in a large number of buildings 22. Each indoor unit 16 and each outdoor unit 12 have a built-in controller, and an air conditioning control network 24 for communicating control command values and the like with the indoor unit 16, the outdoor unit 12, and the centralized monitoring device 20 is configured. Has been. As a communication standard used in the air conditioning control network 24, a unique dedicated communication protocol for each air conditioner manufacturer is used. The centralized monitoring device 20 includes a gateway controller 25 and a centralized monitoring terminal 27, and is connected for communication by a building monitoring network 26. In general, since the building monitoring network 26 also communicates with facilities other than air conditioning facilities, general-purpose communication protocols such as BACnet, LON (Local Operating Network), and Web are used. In the monitoring control function according to the present invention, the gateway controller 25 is implemented not only in the protocol conversion function, but also in either the centralized monitoring terminal 27 or the gateway controller 25, or is shared and implemented in both.

Now, with the recent increase in energy saving demand, such an air conditioner 10 not only increases the efficiency of the air conditioner 18 itself but also suppresses unnecessary power consumption through effective operation of the entire facility. It has been demanded.
In general, the power consumption of the packaged air conditioner type air conditioner 18 for buildings is mostly the inverter compressor 40 (see FIG. 2) in the outdoor unit 12 (for example, about 90% of the inverter compressor 40 of the outdoor unit 12). Power consumption). Therefore, in order to suppress the power consumption of the air conditioner 18, a method of suppressing the power of the inverter compressor 40 by some method has been taken.
As one of the conventional methods, there is a method in which the operation amount is indirectly transmitted to the outdoor unit 12 via the temperature control algorithm of the indoor unit 16, but to the inverter compressor 40 inside the outdoor unit 12 rather than that. It is considered that it is more effective to transmit the operation amount directly.
Further, as another conventional method, there is a primitive method in which a forced stop command is directly transmitted to the outdoor unit 12, but rather, the rotational speed of the inverter compressor 40 is directly transmitted as an operation amount. Then, it is desirable in terms of air conditioning management that the electric energy of each air conditioner 18 is precisely and quantitatively operated, and as a result, the entire electric energy of the air conditioning equipment 10 is precisely controlled.

  Therefore, the centralized monitoring device 20 according to the first embodiment uses the power suppression command indicating the suppression amount of power consumed by the inverter compressor 40 of each outdoor unit 12 as an operation amount, and centrally monitors each power suppression amount. Transmitting directly from the apparatus 20 to each outdoor unit 12, feedback control is performed with the total power consumption of the air conditioning equipment 10 as the controlled amount. The power suppression command is transmitted from the centralized monitoring device 20 for each outdoor unit 12, and the outdoor unit 12 adjusts the rotation speed of the inverter compressor 40 according to the received power suppression command. Here, most of the power consumption of the air conditioning equipment 10 is the power consumption of the inverter compressor 40, and there are power consumptions of the controllers of the indoor unit 16 and the outdoor unit 18 although they are small. The total of these is the power consumption of the entire air conditioning facility 10 and is the amount measured by the power meter of the facility. That is, a feedback control system is configured in which the power suppression value of the inverter compressor 40 of each outdoor unit 12 is an operation amount, the power consumption of the entire air conditioning facility 10 is a controlled amount, and the centralized monitoring device 20 is a controller.

  FIG. 2 is a functional block diagram showing a configuration related to the feedback control system of the air conditioning equipment 10 according to the first embodiment. In the following description, the number of air conditioners 18 included in the air conditioner 10, that is, the number of outdoor units 12 is N. In the following description, one air conditioner 18 is defined as one group.

  As shown in FIG. 2, the centralized monitoring device 20 includes a subtracter 30 and a controller 32.

The subtracter 30 receives the target value W ^* of the total power consumption at a predetermined time interval and the measured value W of the total power consumption at the predetermined time interval.
Then, the subtracter 30 subtracts the measured value W of the total power consumption from the input target value W ^* of the total power consumption, and outputs a difference value ΔW as a result to the controller 32. This difference value ΔW is a necessary suppression amount of the total power consumption of the air conditioning facility 10. That is, by reducing the target value W ^* of the total power consumption, the total power consumption of the air conditioning equipment 10 can be suppressed.

The target value W ^* of the total power consumption is set by an administrator who manages the air conditioning equipment 10, for example. On the other hand, the measured value W of the total power consumption is the total power consumption measured (pulse count measurement) by the air conditioning equipment wattmeter 34 for a predetermined time. The measured value W of the total power consumption is output to the subtractor 30 every time it is weighed. That is, the feedback control according to the first embodiment is performed at each predetermined time interval.
Moreover, although the said predetermined time is preset by the administrator of the air conditioning equipment 10, for example, you may set according to the contract with the electric power company which manages a commercial power grid. For example, if the administrator has a contract with the electric power company that makes a fee structure different from the case where the total power consumption every 30 minutes exceeds the upper limit value, the feedback control is performed. By setting the predetermined time interval to a time sufficiently shorter than 30 minutes (for example, every 5 minutes), feedback of the predetermined time interval is executed a sufficient number of times during 30 minutes, so that the total power consumption can be more reliably ensured. Control can be performed so as not to exceed the upper limit.

Controller 32, as shown in the following equation (1), for each group, Guru is the total amount of the operation amount A _mk of the indoor units 16 included in the group - to calculate the flop operation amount R _m . Note that m is the number of the group including the outdoor unit 12 that is the target of power consumption suppression, and k = 1, 2,... K is the number of the indoor unit 16 in the group. The total number K does not need to be constant, and may be different for each group or may change with time.

The total number M of the group numbers m = 1, 2,... M does not necessarily match the total number N of outdoor units 12 included in the air conditioning equipment 10. The total number M may change with time. One reason that the total number M may be different from the total number of installed units N is that the controller 32 does not include the outdoor unit 12 whose operation state is stopped as a target for suppressing power consumption. Even if the outdoor unit 12 whose operation is stopped is added as a target for suppressing power consumption, it does not lead to a reduction in total power consumption. Therefore, the power consumption of the air conditioning equipment 10 can be controlled with higher accuracy by not including the outdoor unit 12 whose operation is stopped as a power consumption suppression target.
Furthermore, the controller 32 does not have to set the predetermined outdoor unit 12 as a power consumption suppression target. Also in this case, the total number M is smaller than the total number of installed units N. The predetermined outdoor unit 12 is an outdoor unit 12 connected to an indoor unit 16 installed in a section or room requiring temperature management, such as a reception room or a server room. Thereby, even if feedback control is performed, the room temperature change of the room which needs temperature management can be prevented.
In this way, the total number M is obtained by removing the number of outdoor units 12 whose operation has been stopped or the number of outdoor units 12 that are determined to be excluded in advance from the total number N of installed units.

The operation amount A _mk of the indoor unit 16 refers to the operation time of each indoor unit 16 obtained from the operation time and stop time in the operating state, the temperature difference between the set temperature and the indoor temperature, the air conditioning capability of the indoor unit 16, etc. It is the energy relative usage amount of each indoor unit 16 calculated | required from. The operating time and the temperature difference are transmitted from each indoor unit 16 to the controller 32 via the air conditioning control network 24, and the operation amount of each indoor unit 16 is based on the transmitted information and the capacity of each indoor unit 16. A _mk is calculated by the controller 32.
As shown in equation (1), for one group number m, the value obtained by adding the operation amount A _mk of each indoor unit 16 from k = 1 to k = K is the group operation amount R _m of the group _m. It is defined as Here, K is the number of indoor units 16 in the group, and does not need to be constant, and may vary from group to group or depending on the operating state. This addition operation is calculated by the controller 32.

電力抑制指令Ｄ_ｍは、実際のソフトウェア実装においては、例えば、インバータ圧縮機４０に消費電力の削減目標値（目標削減ｋＷ）、あるいは、インバータ圧縮機４０の回転数の減少量（ヘルツダウン）、あるいは、インバータ圧縮機４０の回転数の減少率（パーセントダウン）、電力の抑制量を段階的に示した抑制段階値（抑制レベル）等とすることができる。この電力抑制指令Ｄ_ｍは、集中監視装置２０から、空調制御ネットワーク２４を介して各室外機１２が備える室外機コントローラ４２へ送信される。 In the first embodiment, as shown in the following equation (2), the controller 32 apportions the total facility operation amount that is the sum ΣR _m of the plurality of group operation amounts R _m by each group operation amount R _m . That is, the divided value is multiplied by ΔW which is the amount of suppression of the total power consumption. On the basis of the multiplication result, a proper value of the power suppression command D _m of the outdoor unit 12 of each group is calculated. That is, the appropriate value of the calculated power suppression command _{Dm is} the appropriate value of the suppression amount of power consumed by each inverter compressor 40. C is a constant.

Power suppression command D _m, in the actual software implementation, for example, power consumption reduction target value to the inverter compressor 40 (target reduction kW), or decrease the amount of the rotational speed of the inverter compressor 40 (Hz down), Or it can be set as the reduction | decrease rate (percent down) of the rotation speed of the inverter compressor 40, the suppression step value (suppression level) etc. which showed the suppression amount of electric power in steps. The power suppression command _Dm is transmitted from the centralized monitoring device 20 to the outdoor unit controller 42 included in each outdoor unit 12 via the air conditioning control network 24.

The outdoor unit controller 42, together with the power suppression command D _m received, on the basis of the estimated value I _m of the power consumption of the current of the inverter compressor 40, and calculates the frequency ΔHz indicating a decrease in the rotational speed of the inverter compressor 40 And output to the inverter compressor 40. Here, the meaning of the estimated value is because the outdoor unit controller 42 is generally not equipped with a meter for measuring the power consumption of its own inverter compressor 40 for cost reasons. The inverter compressor 40 rotates according to the frequency ΔHz output from the outdoor unit controller 42. Thereby, the power consumption of the inverter compressor 40 is controlled.
Originally, the outdoor unit 12 outputs a rotational speed command output to the inverter compressor 40 in response to a temperature adjustment algorithm request from the indoor unit 16, but in the first embodiment, the outdoor unit 12 receives the temperature from the indoor unit 16. from tone algorithm request, and outputting the rotational speed command to the inverter compressor 40 a power suppression command D _m from the centralized monitoring apparatus 20 with priority.

In addition, since the outdoor unit 12 drives the inverter compressor 40 as described above, it is a distorted wave alternating current, and it is difficult to measure its power consumption. However, in general, the outdoor unit controller 42 is originally equipped with a current sensor that detects the current consumption of the inverter compressor, and can measure the distorted wave alternating current flowing there in real time. Can be estimated by calculation.
Therefore, the outdoor unit controller 42 according to the first embodiment measures the current and voltage consumed by the inverter compressor 40 with a sensor, and obtains a result of a predetermined calculation based on the measured current and voltage as an estimated value I. Obtain as _m . Further, the outdoor unit controller 42, irrespective of the above operation, stores in advance a map showing the power corresponding to the current and voltage from the current and voltage and the map and the measurement seeking an estimate I _m of the power Also good.
Although most power consumption of the air conditioner 18 as described above is power I _m of the outdoor unit 12 inside of the inverter compressor 40, and other power consumption Q _m slightly of the outdoor unit 12 and indoor units 16 there is but added the power P _m of the air conditioner 18. It is the total value W of P ₁ ,..., P _m ,.

Further, the controller 32, the power restriction instruction D _m to be sent to 12 for each outdoor unit, the determination of the central monitoring apparatus 20 due administrative reasons for each air conditioning zone may be weighted. By weighting the power restriction instruction D _m to be sent to 12 for each outdoor unit, for example, an air conditioning section to be smaller room of change, or air conditioning according to the air conditioning compartment room of change is acceptable even larger 10 The power consumption can be controlled.
Note that the weighting amount for each outdoor unit 12 is determined in advance for each outdoor unit 12, for example, and the centralized monitoring device 20 determines, for example, when the amount of suppression of the total power consumption is a predetermined value or more. While weighting is performed, weighting may not be performed when the amount of suppression of the total power consumption is less than a predetermined value.

  As described above, the centralized monitoring device 20 according to the first embodiment distributes the power suppression amount for each outdoor unit 12 in accordance with the total power consumption of the air conditioning facility 10. The power consumption of the air conditioning facility 10 can be controlled with higher accuracy. Further, the centralized monitoring device 20 gradually reduces the power consumption of the outdoor unit 12 by feedback control, and therefore does not stop the outdoor unit 12 to suppress power consumption. Therefore, since the air conditioning equipment 10 does not cause a sudden change in air conditioning, the air conditioning feeling does not greatly deteriorate.

Also, the central monitoring apparatus 20 according to the first embodiment, according to the operating amount A _mK for each indoor unit 16, since the power suppression command D _m of the outdoor units 12 each is to be calculated, the indoor The power consumption of the air conditioning equipment 10 can be controlled according to the operating state of the machine 16.

Incidentally, in the first embodiment, calculates the estimated value I _m of the power consumption of the outdoor unit 12 is not limited to this, it is not necessary to calculate the estimated value I _m of the power consumption of the outdoor unit 12. In this case, the outdoor unit controller 42 calculates the frequency ΔHz based on the power suppression command D _m and outputs it to the inverter compressor 40.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described.

  In addition, since the structure of the air conditioning equipment 10 which concerns on this 2nd Embodiment is the same as that of the air conditioning equipment 10 which concerns on 1st Embodiment shown in FIG. 1, description is abbreviate | omitted.

FIG. 3 shows a configuration related to feedback control of the air conditioning equipment 10 according to the second embodiment. 3 that are the same as in FIG. 2 are assigned the same reference numerals as in FIG. 2, and descriptions thereof are omitted. In the second embodiment, the calculation of the power suppression command D _m according to the operation amount A _mK for each indoor unit 16 is not performed.

電力抑制指令Ｄ_ｍは、集中監視装置２０から空調制御ネットワーク２４を介して各室外機１２が備える各室外機コントローラ４２へ送信される。 The centralized monitoring device 20 according to the second embodiment receives the estimated power value _Im for each inverter compressor 40 of each outdoor unit 12 from each outdoor unit 12 via the air conditioning control network 24. The method of calculating the estimated value I _m of the power consumption of the inverter compressor 40 is omitted because it is similar to the first embodiment.
By the controller 32 in this second embodiment, as shown in the following equation (3), the sum .SIGMA.I _m estimate I _m from the plurality of outdoor units 12 by the estimated value I _m from the outdoor units 12 each The apportionment, that is, the divided value is multiplied by ΔW, which is the amount of suppression of the total power consumption. On the basis of the multiplication result, power suppression command D _m of the outdoor unit 12 of each group is calculated. C is a constant.

The power suppression command _Dm is transmitted from the centralized monitoring device 20 to each outdoor unit controller 42 included in each outdoor unit 12 via the air conditioning control network 24.

Also in the second embodiment, the outdoor unit 12 whose operation is stopped and the inverter compressor 40 of the predetermined outdoor unit 12 are not included in the power consumption suppression targets. Furthermore, the controller 32 may be weighted to the power suppression command D _m to be transmitted to each outdoor unit 12.

As described above, the central monitoring apparatus 20 according to the second embodiment, the power throttle command D _m of the outdoor units 12 each is calculated in accordance with the estimated value I _m of the power consumption of each outdoor unit 12 each Therefore, it is possible to perform control for suppressing power consumption of the entire air conditioner 10 according to the operating state of the outdoor unit 12.
Also in the second embodiment, the outdoor unit 12 whose operation is stopped or the predetermined outdoor unit 12 is not included in the power consumption suppression targets. Furthermore, the controller 32 may be weighted to the power suppression command D _m to be transmitted to each outdoor unit 12.

In both the first embodiment and the second embodiment, the air conditioner power control is not performed by stopping only the specific air conditioner 18, but by all the air conditioners 18 that are currently in operation that constitute the air conditioner 10. The power suppression value can be shared widely and thinly.
As in the past, it is possible to suppress the power required for the entire air conditioning equipment 10 by forcibly stopping only the specific air conditioner 18. However, in this case, the air-conditioning feeling is extremely deteriorated because the air-conditioning section of the air conditioner 18 is forcibly stopped and no air-conditioning is performed.

According to the present invention, in both the first embodiment and the second embodiment, the consumption of the inverter compressor 40 of each outdoor unit 12 is proportional to the amount of current relative energy consumption of each air conditioner 18. Suppress power precisely. In other words, although the air conditioner 18 has a small amount of suppression value, the air conditioning equipment 10 as a whole can achieve the target suppression value. Therefore, since each power suppression value is small for each air conditioning section, there is an effect that the degree of deterioration of the air conditioning feeling is reduced compared to the case of forced stop.
In the present invention, the air conditioner 18 having a high degree of air conditioning importance is excluded from the suppression control target as an exception, or the weight is adjusted in the proportional calculation, based on the judgment of the centralized monitoring device 20. It is also possible to appropriately distribute the sharing suppression amount reflecting the above.

  As mentioned above, although this invention was demonstrated using said each embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. Various changes or improvements can be added to the above-described embodiments without departing from the gist of the invention, and embodiments to which the changes or improvements are added are also included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Air conditioning equipment 12 Outdoor unit 14 Refrigerant piping 16 Indoor unit 18 Air conditioner 20 Centralized monitoring device 22 Building (or building such as factory)
24 Air conditioning control network 25 Gateway controller 26 Air conditioning monitoring network 27 Centralized monitoring terminal 32 Controller 34 Air conditioning equipment power meter

Claims (6)

An air conditioning compressor power amount centralized monitoring feedback control device for controlling an air conditioning facility including a plurality of air conditioners including one outdoor unit and a plurality of indoor units connected to the outdoor unit via a refrigerant pipe. ,
While calculating an appropriate value of the suppression amount of power consumed by the compressor of each outdoor unit at a predetermined time interval, the compressor power consumption suppression command transmitted directly from itself to each of the outdoor units as an operation amount, Comprising a control means for performing feedback control using the total power consumption that is the total power consumption of the plurality of air conditioners as a controlled amount ;
The control means calculates a group operation amount that is the sum of the operation amounts of the indoor units for each of the air conditioners, and calculates a total facility operation amount that is a sum of a plurality of the group operation amounts as the group operation amount. Based on the result obtained by multiplying the apportioned value by the suppression amount of the total power consumption of the entire air conditioning equipment, the air conditioning compressor electric power that calculates the appropriate value of the compressor power consumption suppression command for each compressor of each outdoor unit is calculated. Centralized monitoring feedback control device. Said control means, said in calculating the respective proper values of the compressor power consumption control command, air conditioner compressor power amount according to claim 1 Symbol mounting the weighted by their decision to send to each compressor of each of the outdoor units Centralized monitoring feedback control device. The air conditioning compressor electric power according to claim 1 or 2 , wherein the control means does not set the outdoor unit whose operation is stopped as a target for suppressing power consumption when calculating each appropriate value of the compressor power consumption suppression command. Centralized monitoring feedback control device. Said control means, said in calculating the respective proper values of the compressor power consumption control command, any one claim of claims 1 to 3 not to the outdoor unit with a predetermined power consumption suppression target Air conditioning compressor power centralized monitoring feedback control device. A plurality of air conditioners comprising one outdoor unit and a plurality of indoor units connected to the outdoor unit via refrigerant piping;
The air conditioning compressor power concentration monitoring feedback control device according to any one of claims 1 to 4 , which controls a plurality of the air conditioners;
Air conditioning equipment equipped with. An air conditioner control method for controlling an air conditioner composed of a plurality of air conditioners comprising one outdoor unit and a plurality of indoor units connected to the outdoor unit via refrigerant piping,
While calculating an appropriate value of the suppression amount of power consumed by the compressor of each outdoor unit at a predetermined time interval, the compressor power consumption suppression command transmitted directly from itself to each of the outdoor units as an operation amount, the controlled amount and the feedback control of the total amount of power consumption is power consumption amount of the plurality of the air conditioners in a row Utame,
For each of the air conditioners, a group operation amount that is the sum of the operation amounts of the indoor units is calculated, and a total facility operation amount that is a sum of a plurality of the group operation amounts is apportioned by each group operation amount. An air conditioning facility control method for calculating an appropriate value of the compressor power consumption suppression command for each compressor of each outdoor unit based on a result of multiplying a suppression amount of the total power consumption of the entire air conditioning facility .

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