JP2019002650A - VAV system and air conditioning control method - Google Patents

Abstract

To prevent an indoor environment from deteriorating and energy consumption from increasing.SOLUTION: VAV controllers 6-1, 6-2 calculate a set air quantity of air supply to be supplied to corresponding controlled areas 1-1, 1-2 on the basis of an indoor temperature and an indoor temperature set value of the controlled areas 1-1, 1-2, to control VAV units 3-1, 3-2. An air conditioning controller 7 predicts an indoor temperature after a prescribed time of the controlled area 1-1 closer to an external wall of a building between the plurality of controlled areas 1-1, 1-2, and changes the indoor temperature set value to a value reduced by a prescribed drop width in the case that at least one of a state where a rise rate of an outside air temperature is higher than a temperature rise rate threshold and a state where a rise rate of an outside air humidity is higher than a humidity rise rate threshold is established, and that a predicted indoor temperature is higher than the present indoor temperature set value.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an air conditioning system, and more particularly to a VAV system including an air conditioner and a plurality of variable air volume units and an air conditioning control method.

  In a conventional VAV (Variable Air Volume) system, after detecting that the room temperature starts to deviate from the room temperature setting value, the air volume and the supply air temperature are determined so that the room temperature approaches the room temperature setting value. (See Patent Document 1). However, for example, when the outside air temperature starts to rise suddenly due to changes in the weather, the influence starts to appear gradually from the area close to the outside air, so the residents on the perimeter side near the windows and the outer wall feel the heat. However, it may take time until the temperature sensor that measures the room temperature detects the rise in the room temperature and starts the control.

In such a case, not only the comfort of the resident is greatly impaired, but the resident who feels the heat lowers the indoor temperature setting value more than necessary, which may cause a problem in terms of energy saving.
In order to prevent such deterioration in comfort and increase in energy consumption, the influence of the change in the outside air on the indoor environment is taken into consideration in advance, and the air flow rate and supply air on the perimeter side are detected before the temperature sensor detects the change in the room temperature. Feedforward control that changes the air temperature is required.

JP 2014-240707 A

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a VAV system and an air conditioning control method that can prevent deterioration of the indoor environment and increase in energy consumption.

  The VAV system of the present invention includes an air conditioner, a variable air volume unit provided for each controlled area, a plurality of controllers configured to control the variable air volume unit for each controlled area, and a plurality of the controlled objects. Of the control areas, a room temperature prediction unit configured to predict a room temperature after a predetermined time in a predetermined first controlled area, and a state in which the increase rate of the outside air temperature is higher than the temperature increase rate threshold And when the indoor temperature predicted by the indoor temperature prediction unit is higher than the current indoor temperature set value when at least one of the conditions in which the increase rate of the outside air humidity is higher than the humidity increase rate threshold is established, An indoor temperature set value changing unit configured to change the temperature set value to a value that is lowered by a predetermined drop width, and each controller sets the set air volume of the supply air to be supplied to the corresponding controlled area. An air volume calculating unit configured to calculate based on the indoor temperature of the controlled area and the indoor temperature set value, and a control configured to control a corresponding variable air volume unit according to the set air volume And a section.

Moreover, in one structural example of the VAV system of this invention, the said indoor temperature prediction part is the said outside air temperature from the present outdoor air humidity, the present setting air volume of the said 1st to-be-controlled area, and the said variable air volume unit. A room temperature after a predetermined time of the first controlled area corresponding to the current temperature of the supply air supplied to one controlled area and the current indoor temperature of the first controlled area is a neural network. And is supplied to the first controlled area and the outside air temperature and outside humidity collected during the data collection period before the indoor temperature is predicted. The apparatus further includes a learning unit configured to perform learning of the neural network based on the temperature of the supply air and the indoor temperature of the first controlled area.
Further, in one configuration example of the VAV system according to the present invention, the indoor temperature setting is performed when the indoor temperature in the first controlled area reaches a predetermined return point value after the indoor temperature setting value is changed. An indoor temperature set value return unit that returns the value to the value before the change is further provided.

  In addition, in one configuration example of the VAV system of the present invention, the temperature of the supply air is set so that the temperature of the supply air supplied from the air conditioner to the plurality of variable air volume units matches the supply air temperature setting value. A supply air temperature control unit configured to control, and a supply air temperature setting unit for load reset control that sets the supply air temperature setting value in a direction in which the air conditioning capability increases when the air conditioning capability is insufficient. The controller corresponding to a predetermined second controlled area among the plurality of controlled areas when the indoor temperature set value is changed and the supply air temperature setting value is changed. A minimum air volume setting instruction unit configured to transmit a minimum air volume setting instruction to the controller, and each controller sets the set air volume to the minimum air volume when receiving the minimum air volume setting instruction. Like It is characterized in further comprising been further minimum air volume setting unit.

  According to the present invention, the indoor temperature after a predetermined time in a predetermined first controlled area is predicted, and the increase rate of the outside air temperature is higher than the temperature increase rate threshold, and the increase rate of the outside air humidity is the humidity increase. When at least one of the states higher than the rate threshold is established and the predicted indoor temperature is higher than the current indoor temperature set value, the indoor temperature set value is changed to a value that is lowered by a predetermined decrease width. Therefore, if the controlled area on the perimeter side near the outer wall of the building is the first controlled area, an increase in the indoor temperature can be suppressed in advance, so that the indoor environment can be prevented from deteriorating, and the indoor temperature setting can be prevented. It is possible to prevent an increase in energy consumption due to an excessively low value.

  In the present invention, after the indoor temperature set value is changed, when the indoor temperature in the first controlled area reaches a predetermined return point value, the indoor temperature set value is returned to the value before the change. It is possible to prevent the indoor temperature from being excessively lowered.

  Further, in the present invention, when the indoor temperature setting value is changed and the supply air temperature setting value is changed to be lowered, the minimum air volume setting is made for the controller corresponding to the predetermined second controlled area. Therefore, it is possible to prevent the second controlled area from being overcooled.

FIG. 1 is a diagram for explaining the principle of the present invention. FIG. 2 is a diagram illustrating an example of a change in room temperature in the controlled area on the perimeter side. FIG. 3 is a block diagram showing the configuration of the VAV system according to the embodiment of the present invention. FIG. 4 is a block diagram showing the configuration of the VAV controller of the VAV system according to the embodiment of the present invention. FIG. 5 is a block diagram showing the configuration of the air conditioning controller of the VAV system according to the embodiment of the present invention. FIG. 6 is a flowchart for explaining the operation of the VAV controller of the VAV system according to the embodiment of the present invention. FIG. 7 is a flowchart for explaining the operation of the air conditioning controller of the VAV system according to the embodiment of the present invention. FIG. 8 is a flowchart for explaining the operation of the air conditioning controller according to the embodiment of the present invention during learning of the neural network. FIG. 9 is a diagram illustrating an example of prediction of a change in indoor temperature in the controlled area after the indoor temperature set value is changed. FIG. 10 is a diagram illustrating another example of the prediction of the indoor temperature change in the controlled area after the indoor temperature set value is changed. FIG. 11 is a diagram illustrating another example of the prediction of the indoor temperature change in the controlled area after the indoor temperature set value is changed. FIG. 12 is a diagram for explaining a return point after changing the indoor temperature set value.

[Principle of the Invention]
The present invention is based on the premise that the abnormal state of the thermal environment of the controlled area close to the outside air is detected by the temperature sensor of the controlled area with a slight time difference. The present invention detects the temperature increase gradually transmitted from the controlled area on the perimeter side near the window and the outer wall to the controlled area on the inner side at the earliest possible stage, and starts the VAV control, thereby comforting the room. It is intended to maintain a stable state.

  As shown in FIG. 1, the indoor temperature PV measured by the temperature sensor 2-1 provided in the controlled area 1-1 on the perimeter side close to the outer wall of the building changes with time as shown in FIG. 2. Is expected. Since the room temperature PV moves away from the room temperature set value SP, the air volume of the VAV unit 3-1 is controlled to try to bring the room temperature PV closer to the room temperature set value SP. It is highly possible that the residents in the controlled area 1-1 are dissatisfied with the indoor environment when they are away from the SP. Therefore, in the present invention, the control of the VAV unit is started before the indoor temperature PV starts to rise in order to keep the indoor environment as constant as possible even when the outside air state changes.

[Example]
Embodiments of the present invention will be described below with reference to the drawings. FIG. 3 is a block diagram showing the configuration of the VAV system according to the embodiment of the present invention. The VAV system includes temperature sensors 2-1 and 2-2 for measuring indoor temperatures in the controlled areas 1-1 and 1-2, and an amount of air supplied to the controlled areas 1-1 and 1-2. Are controlled for each controlled area, a plurality of VAV units 3-1 and 3-2 (variable air volume units), the air conditioner 4, and the air supply from the air conditioner 4 to the controlled areas 1-1 and 1-2. An air supply duct 5 to be supplied, a plurality of VAV controllers 6-1 and 6-2 for controlling the VAV units 3-1 and 3-2, an air conditioning controller 7 for controlling the air conditioner 4, and each VAV from the air conditioner 4 A temperature sensor 8 that measures the temperature of the supply air supplied to the units 3-1 and 3-2, a temperature sensor 10 that measures the outside air temperature, and a humidity sensor 11 that measures the outside air humidity are provided. In FIG. 3, reference numerals 9-1 and 9-2 denote air supply outlets.

  FIG. 4 is a block diagram showing the configuration of the VAV controller 6-1, and FIG. 5 is a block diagram showing the configuration of the air conditioning controller 7. The VAV controller 6-1 includes an indoor temperature measurement value acquisition unit 60 that acquires the value of the indoor temperature measured by the temperature sensor 2-1 in the corresponding controlled area 1-1, and the corresponding VAV unit 3-1. A supply air temperature measurement value acquisition unit 61 that acquires the value of the VAV supply air temperature acquired from a temperature sensor (not shown) that measures the temperature of the supply air supplied to the control area 1-1, and the controlled area 1-1 The air volume calculation unit 62 that calculates the set air volume of the controlled area 1-1 based on the deviation between the indoor temperature and the indoor temperature set value, and the opening of the damper in the VAV unit 3-1 so as to ensure the set air volume The control unit 63 for controlling the air flow, the set air volume value notification unit 64 for notifying the air conditioning controller 7 of the value of the set air volume of the controlled area 1-1, and the indoor temperature and the VAV supply temperature of the controlled area 1-1. Air conditioning controller 7 A temperature notification unit 65 to notify, a control status notification unit 66 for sending a control status indicating the current control state of air conditioning for each controlled area to the air conditioning controller 7, and a room temperature set value notified from the air conditioning controller 7 And a minimum air volume setting unit 68 that sets the set air volume to the minimum air volume when an instruction for setting the minimum air volume is received from the air conditioning controller 7. Note that the VAV controller 6-2 has the same configuration as the VAV controller 6-1.

  The air conditioning controller 7 calculates a supply air temperature measurement value acquisition unit 70 that acquires a supply air temperature measurement value measured by the temperature sensor 8 and an operation amount for controlling the flow rate of the heat medium supplied to the air conditioner 4. An operation amount calculation unit 71 that performs operation, an operation amount output unit 72 that outputs the operation amount to the air conditioner 4, and a set air volume acquisition unit 73 that acquires a value of the set air volume notified from the VAV controllers 6-1 and 6-2. An air volume control unit 74 that controls a fan (not shown) of the air conditioner 4, a temperature acquisition unit 75 that acquires the indoor temperature and the VAV supply temperature notified from the VAV controllers 6-1 and 6-2, and a temperature An outside air temperature obtaining unit 76 that obtains an outside air temperature value from the sensor 10, an outside air humidity obtaining unit 77 that obtains an outside air humidity value from the humidity sensor 11, and the controlled areas 1-1 and 1-2. Control area 1-1 (first object A room temperature prediction unit 78 for predicting the room temperature after a predetermined time in the control area) by a neural network, and a state in which the increase rate of the outside air temperature is higher than the temperature increase rate threshold value and the increase rate of the outside air humidity is higher than the humidity increase rate threshold value. When at least one of the high states is established and the room temperature predicted by the room temperature prediction unit 78 is higher than the current room temperature set value, the room temperature set value is changed to a value lowered by a predetermined decrease width. An indoor temperature set value changing unit 79 for performing the setting, an air supply temperature setting unit 80 for setting the supply air temperature setting value by load reset control, and a change in which the indoor temperature set value is changed and the supply air temperature set value is lowered. A minimum air volume setting instruction unit 81 for transmitting a minimum air volume setting instruction to the VAV controller 6-2 corresponding to the controlled area 1-2 (second controlled area), A learning unit 82 that learns a neural network based on the outside air temperature and the outside humidity collected during the data collection period, the set air volume of the controlled area 1-1, the VAV supply air temperature, and the room temperature, and a room temperature set value After the room temperature set value is changed and the room temperature set value is changed, the room temperature in the controlled area 1-1 reaches a predetermined return point value. When this is done, an indoor temperature set value return unit 86 is provided that returns the indoor temperature set value to the value before the change. The operation amount calculation unit 71 and the operation amount output unit 72 constitute a supply air temperature control unit 83.

  Air (air supply) cooled or heated by the air conditioner 4 is supplied to the VAV units 3-1 and 3-2 in the controlled areas 1-1 and 1-2 through the air supply duct 5, and the VAV units are supplied. It passes through 3-1, 3-2 and is supplied to each controlled area 1-1, 1-2 from the air outlets 9-1, 9-2.

  Next, the operation of this embodiment will be described. FIG. 6 is a flowchart for explaining the operation of the VAV controllers 6-1 and 6-2, and FIG. 7 is a flowchart for explaining the operation of the air conditioning controller 7.

  The room temperature measurement value acquisition units 60 of the VAV controllers 6-1 and 6-2 obtain the values of the room temperatures PV 1 and PV 2 [° C.] of the corresponding controlled areas 1-1 and 1-2 respectively. Obtained from 2-2 (step S100 in FIG. 6).

  The room temperature set value acquisition unit 67 of the VAV controllers 6-1 and 6-2 acquires the room temperature set value SP [° C.] of the controlled areas 1-1 and 1-2 (step S101 in FIG. 6). In this embodiment, the room temperature set value acquisition unit 67 acquires the room temperature set value SP from the air conditioning controller 7.

  The supply air temperature measurement value acquisition units 61 of the VAV controllers 6-1 and 6-2 are measured by temperature sensors (not shown) provided in or near the corresponding VAV units 3-1 and 3-2, respectively. VAV supply air temperatures T1, T2 [° C.] are acquired (step S102 in FIG. 6).

  The temperature notification unit 65 of the VAV controller 6-1 notifies the air conditioning controller 7 of the room temperature PV1 and the VAV supply air temperature T1 in the controlled area 1-1. Similarly, the temperature notification unit 65 of the VAV controller 6-2 notifies the air conditioning controller 7 of the room temperature PV2 and the VAV supply air temperature T2 in the controlled area 1-2 (step S103 in FIG. 6).

The air volume calculation unit 62 of the VAV controllers 6-1 and 6-2, when there is no instruction for setting the minimum air volume (to be described later) from the air conditioning controller 7 (NO in step S104 in FIG. 6), controls the controlled areas 1-1 and 1-2. The set air volumes FSP1, FSP2 [m ³ / s] are calculated according to the heat load situation (step S105 in FIG. 6). Specifically, the air volume calculation unit 62 of the VAV controller 6-1 controls the controlled area 1-1 so that the room temperature PV1 and the room temperature set value SP coincide with each other according to a predetermined control calculation algorithm (for example, PID). The set air volume FSP1 is calculated. Similarly, the air volume calculation unit 62 of the VAV controller 6-2 calculates the set air volume FSP2 in the controlled area 1-2 so that the room temperature PV2 and the room temperature set value SP coincide with each other according to a predetermined control calculation algorithm. To do.

  The set air volume value notification unit 64 of the VAV controllers 6-1 and 6-2 is a set air volume FSP1 of the controlled areas 1-1 and 1-2 calculated by the air volume calculation unit 62 of the VAV controllers 6-1 and 6-2, respectively. , FSP2 is notified to the air conditioning controller 7 (step S106 in FIG. 6).

  The control units 63 of the VAV controllers 6-1 and 6-2 are dampers in the VAV units 3-1 and 3-2 so as to secure the set air volumes FSP1 and FSP2 of the controlled areas 1-1 and 1-2, respectively. The opening degree (not shown) is controlled (step S107 in FIG. 6).

  The control status notification units 66 of the VAV controllers 6-1 and 6-2 send control statuses indicating the current cooling / heating control states of the controlled areas 1-1 and 1-2 to the air conditioning controller 7 (FIG. 6 step S108). If the set air volume is the maximum air volume (damper fully open) during cooling and the relationship between the room temperature PV and the room temperature set value SP is PV> SP + α (α is a predetermined load reset deviation), It is determined that the cooling capacity is insufficient during cooling, and a cooling capacity increase request status is sent to the air conditioning controller 7. The control status notification unit 66 determines that the heating capacity is insufficient at the time of heating if the set air volume at the time of heating is the maximum air volume (damper fully open) and the indoor temperature PV is PV <SP-α. The heating capacity increase request status is sent to

  Further, the control status notifying unit 66 determines that the cooling capacity is sufficient at the time of cooling, if the set air volume is not the maximum air volume at the time of cooling, or if the room temperature PV is PV ≦ SP + α, and it is determined that the cooling is appropriate. The control status shown is sent to the air conditioning controller 7. If the set air volume is not the maximum air volume during heating or if the room temperature PV is PV ≧ SP−α, the control status notifying unit 66 determines that the heating capacity is satisfied during heating and determines that the heating is appropriate. The control status shown is sent to the air conditioning controller 7.

  Further, when the minimum air volume setting unit 68 of the VAV controllers 6-1 and 6-2 receives an instruction for setting the minimum air volume from the air conditioning controller 7 (YES in step S104), the minimum air volume setting unit 68 calculates the minimum air volume FSPmin (step S109 in FIG. 6). ). Necessary ventilation amounts of the controlled areas 1-1 and 1-2 targeted by the respective VAV controllers 6-1 and 6-2 are preset in the VAV controllers 6-1 and 6-2 as known values. . Therefore, the minimum air volume setting unit 68 may calculate the minimum air volume FSPmin that satisfies this necessary ventilation volume.

  Receiving the minimum air volume setting instruction from the air conditioning controller 7, the set air volume value notifying unit 64 of the VAV controller 6 notifies the air conditioning controller 7 of the minimum air volume FSPmin calculated by the minimum air volume setting unit 68 (step S110 in FIG. 6). The control unit 63 of the VAV controller 6 that has received the minimum air volume setting instruction from the air conditioning controller 7 controls the opening degree of the damper in the corresponding VAV unit 3 so as to ensure the minimum air volume FSPmin (step S111 in FIG. 6). . The process of step S108 is as described above.

  The VAV controllers 6-1 and 6-2 perform the processes in steps S100 to S111 as described above at regular intervals until the air conditioning is stopped (YES in step S112 in FIG. 6).

  On the other hand, the supply air temperature setting unit 80 of the air conditioning controller 7 acquires the control status from each of the VAV controllers 6-1 and 6-2 (step S200 in FIG. 7). The supply air temperature setting unit 80 sets the supply air temperature setting value SASP in a direction in which the air conditioning capability increases when the air conditioning capability is insufficient. In other words, when the acquired control status is the cooling capacity increase request status or the heating capacity increase request status (YES in step S201 in FIG. 7), the supply air temperature setting unit 80 changes the cooling capacity increase request status or the heating capacity increase request status. Accordingly, the supply air temperature setting value SASP is set (step S202 in FIG. 7). When the control status is the cooling capacity increase request status, the supply air temperature setting unit 80 decreases the supply air temperature setting value SASP by, for example, a predetermined temperature range. When the control status is the heating capacity increase request status, the supply air temperature setting unit 80 increases the supply air temperature setting value SASP by a predetermined temperature range.

  At the start of air conditioning, supply air temperature setting unit 80 sets supply air temperature setting value SASP to a predetermined initial value. In this embodiment, the supply air temperature setting value SASP is changed when at least one of the control statuses from the plurality of VAV controllers 6-1 and 6-2 is the cooling capacity increase request status or the heating capacity increase request status. ing. On the other hand, the supply air temperature setting unit 80 determines a total control status in which the control statuses from the VAV controllers 6-1 and 6-2 are combined into one, and this total control status is the cooling capacity increase request status. Alternatively, in the case of the heating capacity increase request status, the supply air temperature setting value SASP may be changed.

  The method for determining the total control status is a well-known technique in conventional load reset control, and is disclosed in Japanese Patent Nos. 3254621 and 3300964, and will be described in detail.

The supply air temperature measurement value acquisition unit 70 of the air conditioning controller 7 acquires the supply air temperature measurement value TSA measured by the temperature sensor 8 (step S203 in FIG. 7).
The operation amount calculation unit 71 of the air conditioning controller 7 calculates the operation amount MV so that the supply air temperature measurement value TSA and the supply air temperature set value SASP match in accordance with a predetermined control calculation algorithm (for example, PID) (FIG. 7). Step S204). The operation amount output unit 72 of the air conditioning controller 7 outputs the operation amount MV calculated by the operation amount calculation unit 71 to the air conditioner 4 (step S205 in FIG. 7). Thus, the amount of the heat medium (cold water or hot water) supplied to the air conditioner 4 is adjusted according to the operation amount MV, and the supply air temperature is controlled.

The set air volume acquisition unit 73 of the air conditioning controller 7 acquires the set air volume values FSP1 and FSP2 notified from the respective VAV controllers 6-1 and 6-2 (step S206 in FIG. 7).
The air volume control unit 74 of the air conditioning controller 7 calculates the total required air volume value of the entire system from the set air volume values FSP1 and FSP2 acquired by the set air volume acquisition unit 73, obtains the fan rotation speed according to the total required air volume value, The fan (not shown) of the air conditioner 4 is controlled so as to obtain the obtained fan rotation speed (step S207 in FIG. 7). In this way, the air volume of the air supplied from the air conditioner 4 is controlled.

Next, the outside air temperature acquisition unit 76 of the air conditioning controller 7 acquires the value of the outside air temperature TO [° C.] measured by the temperature sensor 10 (step S208 in FIG. 7).
The outside air humidity acquisition unit 77 of the air conditioning controller 7 acquires the value of the outside air humidity HO [%] measured by the humidity sensor 11 (step S209 in FIG. 7).

  The temperature acquisition unit 75 of the air conditioning controller 7 and the indoor temperatures PV1 and PV2 of the controlled areas 1-1 and 1-2 notified from the VAV controllers 6-1 and 6-2 and the controlled areas 1-1 and 1- 1 are used. 2 VAV supply air temperatures T1 and T2 are acquired (step S210 in FIG. 7).

  The indoor temperature prediction unit 78 of the air conditioning controller 7 predicts the indoor temperature PV1 after a predetermined time (for example, 10 minutes later) in the controlled area 1-1 on the perimeter side near the outer wall of the building (step S211 in FIG. 7). Specifically, the indoor temperature prediction unit 78 includes the latest outside air temperature TO acquired by the outside air temperature acquisition unit 76, the latest outside air humidity HO acquired by the outside air humidity acquisition unit 77, and the VAV controller acquired by the set air volume acquisition unit 73. Based on the latest set airflow value FSP1 of 6-1, the latest VAV supply temperature T1 of the controlled area 1-1 acquired by the temperature acquisition unit 75, and the latest indoor temperature PV1 of the controlled area 1-1, The room temperature PV1 after a predetermined time in the controlled area 1-1 is predicted by a recurrent neural network.

  In the present embodiment, the indoor temperature PV1 is predicted for the controlled area 1-1, but which controlled area is the target. For example, a controlled area that is most susceptible to a sudden rise in the outside air temperature TO may be registered in the indoor temperature prediction unit 78 as a prediction target area.

The room temperature prediction unit 78 includes a recurrent neural network 780 that models the relationship between the outside air temperature TO, the outside air humidity HO, the set airflow value FSP1, the VAV supply air temperature T1, the room temperature PV1, and the room temperature PV1 after a predetermined time. Has been built.
Here, the learning operation of the recurrent neural network 780 performed prior to the prediction of the room temperature PV1 by the room temperature prediction unit 78 will be described with reference to the flowchart of FIG.

  Before the prediction of the indoor temperature PV1, the operation of the VAV controllers 6-1 and 6-2 described in FIG. 6 and the operation of the air conditioning controller 7 described in steps S200 to S210 of FIG. 7 are performed at regular intervals. In the past data collection period, the learning unit 82 of the air conditioning controller 7 records the data of the outside air temperature TO, the outside air humidity HO, the set airflow value FSP1, the VAV supply air temperature T1, and the room temperature PV1 (step S300 in FIG. 8). .

  Then, the learning unit 82 sets the time series data of the outside air temperature TO, the time series data of the outside air humidity HO, the time series data of the set air flow value FSP1 and the VAV supply air temperature T1 among the time series data recorded during the data collection period. The time series data of the room temperature PV1 and the time series data of the room temperature PV1 are input variables of the recurrent neural network 780 of the room temperature prediction unit 78, and the time series data of the room temperature PV1 delayed by a predetermined time with respect to these input variables is the recurrent neural network. The recurrent neural network 780 is learned so that the target output variable is obtained as the output variable 780 (step S301 in FIG. 8).

  In this way, by causing the recurrent neural network 780 to learn the past temperature change pattern in advance, the future indoor temperature PV1 can be appropriately predicted by the recurrent neural network 780.

  The indoor temperature set value changing unit 79 of the air conditioning controller 7 has a rate of increase ΔTO per unit time of the outside air temperature TO from a predetermined time (for example, 10 minutes before) to the present higher than a predetermined temperature increase rate threshold TH1. At least one of a state and a state in which the increase rate ΔHO per unit time of the outside air humidity HO from a certain time before (for example, 10 minutes before) to the present is higher than a predetermined humidity increase rate threshold TH2, and When indoor temperature PV1 after a predetermined time predicted by indoor temperature prediction unit 78 is higher than a value (SP + γ) obtained by adding predetermined value γ to current indoor temperature set value SP (YES in step S212 in FIG. 7), The provisional room temperature set value iSP = SP−D, which is obtained by lowering the room temperature set value SP by a predetermined drop width D, is changed (step S213 in FIG. 7).

  The room temperature set value notification unit 84 of the air conditioning controller 7 notifies the changed temporary room temperature set value iSP to the VAV controllers 6-1 and 6-2 (step S214 in FIG. 7). Thus, when the indoor temperature setting value is changed from SP to iSP, the indoor temperatures PV1 and PV2 in the controlled areas 1-1 and 1-2 are changed by the operation of the VAV controllers 6-1 and 6-2 described in FIG. descend.

  When the indoor temperature PV1 is predicted by the indoor temperature prediction unit 78, the change in the indoor temperature PV1 in the controlled area 1-1 after the indoor temperature set value is changed from SP to iSP is as shown in FIG. It is expected that. In addition, when the prediction by the indoor temperature prediction unit 78 deviates, the change in the indoor temperature PV1 is expected to be as shown in FIG.

  When the indoor temperature prediction unit 78 predicts the indoor temperature PV1, a force that suppresses the increase in the indoor temperature PV1 works appropriately and changes in PV1 are hardly observed. On the other hand, when the prediction by the room temperature prediction unit 78 deviates, the room temperature PV1 approaches the room temperature set value iSP.

  Even if the prediction by the indoor temperature prediction unit 78 is successful, if the time elapses, the indoor temperature PV1 will eventually reach the indoor temperature set value iSP as shown in FIG. In the example of FIGS. 9 to 11, the change in the indoor temperature PV1 of the controlled area 1-1 on the perimeter side near the outer wall of the building is expected, but the room in the controlled area 1-2 far from the outer wall of the building is expected. Temperature PV2 is expected to change as well.

The purpose of changing the room temperature set value from SP to iSP is to suppress the rise in the room temperature PV1, PV2 in advance, and not to control the room temperature PV1, PV2 to the room temperature set value iSP.
Therefore, the room temperature set value return unit 86 of the air conditioning controller 7 changes the room temperature set value from SP to iSP, and then the time when the room temperature PV1 in the controlled area 1-1 reaches the value of the predetermined return point RSP. (YES in step S215 in FIG. 7), the room temperature set value iSP is returned to the value SP before the change (step S216 in FIG. 7). As shown in FIG. 12, the return point RSP is normally an intermediate value between the room temperature set value SP before the change and the room temperature set value iSP after the change.

  The indoor temperature set value notification unit 84 notifies the VAV controllers 6-1 and 6-2 of the restored indoor temperature set value SP (step S217 in FIG. 7). Thus, when the room temperature set value returns to SP, the room temperatures PV1 and PV2 in the controlled areas 1-1 and 1-2 are increased by the operation of the VAV controllers 6-1 and 6-2 described in FIG. The example of FIG. 12 shows an example in which the indoor temperature PV1 that has reached the return point RSP starts increasing, but the indoor temperature PV2 in the controlled area 1-2 also starts increasing in the same manner.

  In this embodiment, the purpose of changing the indoor temperature setting value from SP to iSP is to start moderate control as soon as possible, and not to suddenly lower the indoor temperatures PV1 and PV2. The descending width D when the value changing unit 79 changes the indoor temperature set value SP is about 1 ° C. at the maximum.

  Further, the indoor temperature set value changing unit 79 may change the descending width D according to the degree to which the indoor temperature PV1 after a predetermined time predicted by the indoor temperature predicting unit 78 exceeds the current indoor temperature set value SP. Good. For example, when the predicted indoor temperature PV1 after a predetermined time is higher than the value (SP + γ1) obtained by adding the predetermined value γ1 (for example, γ1 = 0.5 ° C.) to the indoor temperature set value SP. The descending width D is set to 0.5 ° C. Further, the indoor temperature set value changing unit 79 uses a value (SP + γ2) in which the predicted indoor temperature PV1 after a predetermined time is obtained by adding a predetermined value γ2 (γ1 <γ2, for example, γ2 = 1 ° C.) to the indoor temperature set value SP. Is too high, the descending width D is set to 1 ° C.

  In the present embodiment, when the room temperature set value is changed from SP to iSP, when the cooling capacity increase request status is generated as described above and the supply air temperature set value SASP is changed, It is expected that the controlled area 1-2 away from the outer wall will be too cold.

  Therefore, the minimum air volume setting instruction unit 81 of the air conditioning controller 7 changes the room temperature set value from SP to iSP during cooling and changes the supply air temperature set value SASP (step S218 in FIG. 7). An instruction for setting the minimum air volume is transmitted to the VAV controller 6-2 corresponding to the controlled area 1-2 on the interior side away from the outer wall of the building (step S219 in FIG. 7).

  In this embodiment, the minimum air volume is set for the controlled area 1-2, but which controlled area is the target. For example, a controlled area that is hardly affected by the outside air temperature TO because it is away from the outer wall of the building may be registered in the minimum air volume setting instruction unit 81 as an area for setting the minimum air volume. The target area for the minimum air volume setting may be single or plural.

The air-conditioning controller 7 performs the processes of steps S200 to S219 as described above at regular intervals until the air-conditioning stops (YES in step S220 in FIG. 7).
Note that the minimum air volume setting instruction unit 81 transmits the minimum air volume setting instruction to the VAV controller 6 that is the transmission destination of the minimum air volume setting instruction when, for example, the indoor temperature setting value returns from SP to SP. An instruction to cancel the minimum air volume setting may be sent.

  As described above, according to the present embodiment, since the increase in the indoor temperatures PV1 and PV2 can be suppressed in advance, the deterioration of the indoor environment can be prevented, and the energy consumption due to the excessive decrease in the indoor temperature set value SP can be prevented. An increase can be prevented.

  Each of the VAV controllers 6-1 and 6-2 and the air conditioning controller 7 of the present embodiment includes a computer having a CPU (Central Processing Unit), a storage device, and an external interface, and a program for controlling these hardware resources. Can be realized. The CPU of each device executes the processing described in the present embodiment according to the program stored in the storage device, thereby realizing the VAV system and the air conditioning control method of the present invention.

  The present invention can be applied to a VAV system.

  1-1, 1-2 ... controlled area, 2-1, 2-2, 8, 10 ... temperature sensor, 3-1, 3-2 ... VAV unit, 4 ... air conditioner, 5 ... air supply duct, 6 -1,6-2 ... VAV controller, 7 ... air conditioning controller, 9-1, 9-2 ... outlet, 11 ... humidity sensor, 60 ... indoor temperature measurement value acquisition unit, 61 ... supply air temperature measurement value acquisition unit, 62 ... Air volume calculation unit, 63 ... Control unit, 64 ... Set air volume value notification unit, 65 ... Temperature notification unit, 66 ... Control status notification unit, 67 ... Indoor temperature set value acquisition unit, 68 ... Minimum air volume setting unit, 70 ... Supply air temperature measurement value acquisition unit, 71 ... operation amount calculation unit, 72 ... operation amount output unit, 73 ... set air volume acquisition unit, 74 ... air volume control unit, 76 ... outside air temperature acquisition unit, 76 ... outside air temperature acquisition unit, 77 ... outdoor humidity acquisition unit, 78 ... indoor temperature prediction unit, 79 ... indoor temperature set value change unit, 80 ... Air temperature setting unit, 81 ... minimum air volume setting instruction section, 82 ... learning unit, 83 ... supply air temperature control unit, 84 ... indoor temperature setting value notification unit, 86 ... indoor temperature setting value return unit, 780 ... recurrent neural network.

Claims (8)

An air conditioner,
A variable air volume unit provided for each controlled area;
A plurality of controllers configured to control the variable air volume unit for each controlled area;
An indoor temperature prediction unit configured to predict an indoor temperature after a predetermined time of a predetermined first controlled area among the plurality of controlled areas;
At least one of a state in which the rate of increase in the outside air temperature is higher than the temperature increase rate threshold and a state in which the rate of increase in the outside air humidity is higher than the humidity increase rate threshold is established, and the room temperature predicted by the room temperature prediction unit is An indoor temperature set value changing unit configured to change the indoor temperature set value to a value lowered by a predetermined drop width when the current indoor temperature set value is higher than the current indoor temperature set value;
Each controller
An air volume calculating unit configured to calculate a set air volume of supply air to be supplied to a corresponding controlled area based on the indoor temperature of the controlled area and the indoor temperature setting value;
A VAV system comprising: a control unit configured to control a corresponding variable air volume unit according to the set air volume. The VAV system according to claim 1,
The indoor temperature prediction unit is configured to provide a current outside air temperature, a current outside air humidity, a current set air volume in the first controlled area, and a current supply air supplied from the variable air volume unit to the first controlled area. The indoor temperature after a predetermined time of the first controlled area corresponding to the temperature of the first controlled area and the current indoor temperature of the first controlled area is predicted by a neural network,
The outside temperature and outside humidity collected in the data collection period before the indoor temperature is predicted, the set air volume in the first controlled area, the temperature of the supply air supplied to the first controlled area, and the first A VAV system, further comprising: a learning unit configured to perform learning of the neural network based on a room temperature of one controlled area. The VAV system according to claim 1 or 2,
After changing the room temperature set value, when the room temperature in the first controlled area reaches a predetermined return point value, the room temperature set value is returned to the value before the change. The VAV system further comprising a unit. The VAV system according to any one of claims 1 to 3,
A supply air temperature control unit configured to control the temperature of the supply air such that the temperature of the supply air supplied from the air conditioner to the plurality of air flow rate units and the supply air temperature setting value coincide; ,
A supply air temperature setting unit for load reset control, which sets the supply air temperature setting value in a direction in which the air conditioning capacity increases when the air conditioning capacity is insufficient;
When the indoor temperature set value is changed and a change is made to lower the supply air temperature set value, a controller corresponding to a predetermined second controlled area among the plurality of controlled areas is selected. A minimum air volume setting instruction unit configured to transmit a minimum air volume setting instruction to the
Each controller further includes a minimum air volume setting unit configured to set the set air volume to a minimum air volume when receiving an instruction for setting the minimum air volume. The controller that controls the variable air volume unit provided for each controlled area determines the set air volume of the supply air supplied to the corresponding controlled area based on the indoor temperature of the controlled area and the indoor temperature setting value. Calculating each step,
The controller controlling the variable air volume unit for each controlled area according to the set air volume;
Predicting a room temperature after a predetermined time of a predetermined first controlled area among the plurality of controlled areas;
At least one of a state in which the increase rate of the outside air temperature is higher than the temperature increase rate threshold and a state in which the increase rate of the outside air humidity is higher than the humidity increase rate threshold is established, and the predicted indoor temperature is the current indoor temperature setting. And a step of changing the indoor temperature set value to a value lowered by a predetermined decrease width when the value is higher than the value. In the air-conditioning control method according to claim 5,
The step of predicting the indoor temperature includes a current outside air temperature, a current outside air humidity, a current set air volume in the first controlled area, and an air supply supplied from the variable air volume unit to the first controlled area. Predicting the indoor temperature after a predetermined time of the first controlled area corresponding to the current temperature of the first controlled area and the current indoor temperature of the first controlled area by a neural network,
The outside temperature and outside humidity collected in the data collection period before the indoor temperature is predicted, the set air volume in the first controlled area, the temperature of the supply air supplied to the first controlled area, and the first An air conditioning control method further comprising the step of learning the neural network based on a room temperature in one controlled area. The air conditioning control method according to claim 5 or 6,
The method further includes the step of returning the room temperature set value to the value before the change when the room temperature in the first controlled area reaches a value of a predetermined return point after changing the room temperature set value. An air conditioning control method. In the air-conditioning control method according to any one of claims 5 to 7,
Controlling the temperature of the supply air so that the temperature of the supply air supplied from the air conditioner to the plurality of air volume units matches the supply air temperature setting value;
A step for load reset control for setting the supply air temperature setting value in a direction in which the air conditioning capacity increases when the air conditioning capacity is insufficient;
When the indoor temperature set value is changed and a change is made to lower the supply air temperature set value, a controller corresponding to a predetermined second controlled area among the plurality of controlled areas is selected. Sending a minimum air volume setting instruction to the
The air conditioning control method further comprising the step of the controller receiving the instruction for setting the minimum air volume setting the set air volume to the minimum air volume.

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