JP5050020B2 - Air conditioning control system - Google Patents

Description

  The present invention relates to an air conditioning control system that performs air conditioning of a room to be controlled in various buildings such as a multipurpose intelligent building, an office building, a residential building, and a factory.

  2. Description of the Related Art Conventionally, an air-conditioning control apparatus mixes and adjusts return air taken in from a room to be controlled and outside air taken in from outside a building, and supplies the air as air supply to the room to be controlled for air conditioning control. Since the return air has already been adjusted in temperature and humidity to some extent, mixing the return air and the outside air to supply air reduces the load on the air conditioning control device compared to the case where only the outside air is air-conditioned. .

  By the way, when adjusting the humidity with the air conditioning control device, the air to be adjusted is once supercooled and dehumidified, and then overheated again to obtain a desired temperature, so that a great amount of energy is consumed and a load higher than the temperature adjustment is applied.

  Therefore, in the air conditioning control device described in Patent Document 1, a return air control system that adjusts the return air and an outside air control system that adjusts the outside air are separately provided, and the air adjusted in each system is mixed to supply air An air-conditioning control device has been proposed.

  By configuring with two air conditioning control systems in this way, it is possible to set the return air whose humidity has already been adjusted to perform only temperature adjustment without performing humidity control. The load can be further reduced.

Moreover, in the air-conditioning control apparatus described in Patent Document 1, a necessary outside air introduction amount is obtained so as to keep the CO ₂ environment within an appropriate range, and the rotational speed of the fan is controlled so that the obtained necessary outside air amount is taken in. Therefore, the necessary amount of outside air can be reliably supplied to the room to be controlled.

JP 2008-236732 A

  In the air conditioning control apparatus configured by two air conditioning control systems as described in Patent Document 1, a DDC (Direct Digital) that controls the operation of the cold / hot water coils and fans and their facilities is provided for each system. Controller) is provided. The DDC of each system controls the operation of each cold / hot water coil and fan based on the instruction from the central controller and the static pressure in the air supply duct to the room to be controlled and the temperature and humidity conditions of the air supply. For this reason, the control status of the other system in the DDC is not taken into account, which may cause problems.

For example, in an air conditioning control device configured with two air conditioning control systems, during warm-up operation immediately after power-on, only the return air control system is operated to air-condition the circulating air, and the occupants in the room to be controlled When the CO ₂ concentration increases, the outside air control system is switched to start operation in order to mix outside air. At this time, the fan motor of the outside air control system becomes insufficient in starting torque, and the air is controlled by the return air control system. There is a problem that the air conditioned by the outside air control system cannot be pushed into the air supply duct in which the air is circulating.

  Conversely, when switching from the state of the outside air cooling operation in which only the outside air control system is operated to start the operation of the return air control system due to an increase in the cooling load, the fan motor of the return air control system becomes insufficient in starting torque. Therefore, there is a problem that the air conditioned by the return air control system cannot be pushed into the air supply duct in which the air conditioned by the outside air control system circulates.

  In addition, in the DDC of each system of the air conditioning control apparatus configured with two air conditioning control systems, each of the systems performs deviation control with respect to the disturbance, so humidification control is performed by the return air control system so as to achieve the target humidity. When overshooting is sometimes performed, dehumidification control is performed in the outside air control system, and there is a problem that wasteful energy may be consumed.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an air conditioning control system that efficiently performs air conditioning control by linking the control of the return air processing system and the control of the outside air processing system. And

  In order to achieve the above object, an air conditioning control system of the present invention has a target static pressure value in an air supply duct through which air to be supplied to a room to be air-conditioned is controlled, and the return air taken in from the room to be air-conditioned. And a first control device that performs return air control for sending air to the air supply duct with an air volume based on the target static pressure value, and is connected to the first control device, takes in outside air, performs air conditioning processing, and In the air conditioning control system including the second control device that performs the outside air control to be sent to the supply duct with the air volume based on the target static pressure value, the first control device and the second control device are configured to perform the return air control. From the state in which only one of air that has been air-conditioned and air that has been air-conditioned by the outside air control is supplied to the room to be air-conditioned, the air that has been air-conditioned by the return air control and the outside air control Control signal generation for generating a control signal for performing control by lowering the target static pressure value for a predetermined time when the air-conditioned air is mixed and switched to a state of being supplied to the air-conditioning control target room It has the part.

  In addition, in the air conditioning control system, the predetermined time during which the target static pressure value is lowered is mixed with the air that has been air-conditioned by the return air control and the air that has been air-conditioned by the outside air control, and enters the air-conditioning control target room. When switching to the supplied state, it is good also as time until the damper opened from a closed state reaches a target opening degree.

  In addition, an air conditioning control system according to another aspect of the present invention is connected to a first control device that performs return air control for air conditioning the return air taken in from the air conditioning control target room, and the first control device. In the air conditioning control system including a second control device that performs outside air control for taking in outside air and performing air conditioning processing, the second control device detects that the control related to humidity is being executed by the first control device. Then, it has the control signal generation part which stops the production | generation of the control signal for the control regarding humidity in an own apparatus, It is characterized by the above-mentioned.

  According to the air conditioning control system of the present invention, the air conditioning control can be efficiently performed by linking the control of the return air processing system and the control of the outside air processing system.

1 is an overall view showing a configuration of an air conditioning control system according to an embodiment of the present invention. It is a block diagram which shows the structure of DDC of the air-conditioning control system by one Embodiment of this invention. It is a sequence diagram which shows operation | movement of the air-conditioning control system by one Embodiment of this invention.

<Configuration of air conditioning control system according to one embodiment>
A configuration of an air conditioning control system 1 according to an embodiment of the present invention will be described with reference to FIG.

The air conditioning control system 1 according to the present embodiment includes a return air processing air conditioner 11 that takes in the return air from the rooms A and B subject to air conditioning control and performs air conditioning, and a duct 12 through which air conditioned by the return air processing air conditioner 11 passes. And a damper 13 for adjusting the amount of air passing through the duct 12, a duct 14 for passing air exhausted outside the building out of the return air taken in by the return air processing air conditioner 11, and an amount of air passing through the duct 14. Measuring the CO ₂ concentration of the return air taken in from the damper 15, the return air processing air conditioner 11, the damper 13, and the DDC 16 as the first control device for controlling the operation of the damper 15, and the air-conditioning control target rooms A and B The CO ₂ concentration sensor 17, the outside air processing air conditioner 18 that takes in the outside air and air-conditions, the duct 19 that passes the air conditioned by the outside air processing air conditioner 18, and the amount of air that passes through the duct 19 is adjusted. Connected to the damper 20, the duct 12 and the duct 19, the air conditioned by the return air processing air conditioner 11 and the air conditioned by the outside air processing air conditioner 18 are mixed and supplied to the rooms A and B subject to air conditioning control. An air supply duct 21 through which air is supplied, a pressure sensor 22 that measures the static pressure in the air supply duct 21, an air supply temperature sensor 23 that measures the temperature of the air supply in the air supply duct 21, and an air supply duct The air supply humidity sensor 24 for measuring the humidity of the air supply in the air supply 21, the air supply unit 25 for supplying the air passing through the air supply duct 21 to the room A, and the air passing through the air supply duct 21 to the room B An air supply unit 26 that supplies air, a DDC 27 that is connected to the DDC 16 and controls the operation of the outside air processing air conditioner 18, the damper 20, the air supply units 25 and 26, and the inside of the room A subject to air conditioning control Indoor temperature to measure the temperature of Sensor 28, indoor humidity sensor 29 for measuring the humidity in room A, indoor temperature sensor 30 for measuring the temperature in room B, indoor humidity sensor 31 for measuring the humidity in room B, and the temperature of the outside air. It has an outside air temperature sensor 32 for measuring, an outside air humidity sensor 33 for measuring the humidity of the outside air, and a central control device 34 for controlling the operation of the DDC 16 and the DDC 27.

  The return air processing air conditioner 11 takes in the return air from the air-conditioning control target rooms A and B and sends it into the duct 12, an inverter 112 that controls the rotation speed of the fan 111, and the intake return air. It has a cold water coil 113, a hot water coil 114, and a steam coil 115 for air conditioning.

  The outside air processing air conditioner 18 includes a fan 181 for taking outside air and sending it to the duct 19, an inverter 182 for controlling the rotation speed of the fan 181, a cold water coil 183 for air-conditioning the taken return air, A coil 184 and a steam coil 185.

  FIG. 2 shows a detailed configuration of the DDC 16 that controls the return air processing and the DDC 27 that controls the outside air processing connected to the DDC 16 according to the present embodiment.

  The DDC 16 includes a driving instruction acquisition unit 161, a measurement value acquisition unit 162, an outside air processing state monitoring unit 163, and a control signal generation unit 164.

  The driving instruction acquisition unit 161 acquires an instruction transmitted from the central controller 34.

  The measurement value acquisition unit 162 acquires measurement values from the supply air temperature sensor 23 and the supply air humidity sensor 24.

  The outside air processing state monitoring unit 163 monitors the outside air processing state by acquiring a control signal generated in the DDC 27 that controls the outside air processing.

  The control signal generation unit 164 has a target static pressure value in the air supply duct 21 set in advance, the instruction acquired from the operation instruction acquisition unit 161, the measurement values of various sensors acquired by the measurement value acquisition unit 162, the outside air Based on the outside air treatment state monitored by the treatment state monitoring unit 163 and the target static pressure value, a control signal for controlling the inverter 112 of the return air treatment air conditioner 11 and the amount of cold water supplied to the cold water coil 113 are controlled. A control signal, a control signal for controlling the amount of hot water supplied to the hot water coil 114, a control signal for controlling the amount of steam supplied to the steam coil 115, a control signal for controlling the opening degree of the dampers 13 and 15, and the opening degree of the damper 15 A control signal for controlling is generated and transmitted to each equipment device.

  The DDC 27 includes an operation instruction acquisition unit 271, a measurement value acquisition unit 272, a return air processing state monitoring unit 273, and a control signal generation unit 274.

  The driving instruction acquisition unit 271 acquires an instruction transmitted from the central controller 34.

The measurement value acquisition unit 272 acquires measurement values from the CO ₂ concentration sensor 17, the pressure sensor 22, the indoor temperature sensors 28 and 30, the indoor humidity sensors 29 and 31, the outdoor air temperature sensor 32, and the outdoor air humidity sensor 33.

  The return air processing state monitoring unit 273 monitors the return air processing state by acquiring a control signal generated in the DDC 16 that controls the return air processing.

  The control signal generation unit 274 has a preset target static pressure value in the air supply duct 21, an instruction acquired from the operation instruction acquisition unit 271, measurement values of various sensors acquired by the measurement value acquisition unit 272, and return Control signal for controlling the number of revolutions of the inverter 182 of the outside air processing air conditioner 18 based on the return air processing state monitored by the air processing state monitoring unit 273 and the target static pressure value, cold water supplied to the cold water coil 183 A control signal for controlling the amount, a control signal for controlling the amount of hot water supplied to the hot water coil 184, a control signal for controlling the amount of steam supplied to the steam coil 185, a control signal for controlling the opening of the damper 20, and the air supply unit 25 A control signal for controlling the amount of air supplied from the air supply unit 26 to the room A and a control signal for controlling the amount of air supplied from the air supply unit 26 to the room B are generated and transmitted to the respective equipment devices.

  In addition, the control signal generation unit 164 of the DDC 16 and the control signal generation unit 274 of the DDC 27 have only one of the air conditioned by the return air control and the air conditioned by the outside air control. From the state of being supplied to the rooms A and B, the air that has been air-conditioned by the return air control and the air that has been air-conditioned by the outside air control are mixed and switched to the state of being supplied to the rooms A and B subject to air-conditioning control. Then, a preset target static pressure value is lowered for a predetermined time, and a control signal for executing each control is generated.

  Further, when the control signal generation unit 274 of the DDC 27 detects that the control related to the humidity is being executed by the DDC 16, the control signal generation unit 274 generates a control signal for executing the outside air control by stopping the control related to the humidity in the own apparatus.

<Operation of Air Conditioning Control System According to One Embodiment>
Next, operation | movement of the air-conditioning control system 1 by this embodiment is demonstrated with reference to the sequence diagram of FIG.

  First, when the air-conditioning control system 1 is turned on, warm-up operation for executing air-conditioning control only by return air processing is performed to perform pre-cooling or pre-heating, and the central controller 34 sends a warm-up operation to the DDC 16 and DDC 27. A return air processing start instruction is transmitted (S1).

  In the DDC 16, when the return air processing start instruction transmitted from the central controller 34 is acquired by the operation instruction acquisition unit 161 of the DDC 16, the return air processing is started, and the air in the air conditioning control target rooms A and B is returned to the air. It is controlled so that it is taken in by the air conditioner 11 and air-conditioned and supplied again to the rooms A and B (S2).

  As a specific process when the return air process is started, first, a control signal for opening the dampers 13 and 15 is generated and transmitted to the dampers 13 and 15 in the control signal generation unit 164 of the DDC 16. The dampers 13 and 15 are opened.

  Further, in the control signal generation unit 164, a control signal for controlling the amount of cold water supplied to the cold water coil 113 based on the measurement values acquired from the supply air temperature sensor 23 and the supply air humidity sensor 24 by the measurement value acquisition unit 162, hot water A control signal for controlling the amount of hot water supplied to the coil 114 and a control signal for controlling the amount of steam supplied to the steam coil 115 are generated and transmitted to the cold water coil 113, the hot water coil 114, and the steam coil 115, respectively. And in the cold water coil 113, the hot water coil 114, and the steam coil 115, the return air taken in is cooled with cold water, hot water, and steam supplied in an amount based on the control signal transmitted from the control signal generation unit 164. .

  Further, in the control signal generation unit 164, a control signal for controlling the inverter 112 is generated based on a preset target static pressure value in the air supply duct 21 and transmitted to the inverter 112. Then, based on the control signal transmitted from the control signal generator 164, the inverter 112 is operated and the rotation of the fan 111 is controlled.

  When the return air process is started, the damper 20 is closed in the control signal generation unit 274 of the DDC 27 so that the air after the return air process is not sent from the duct 12 through the duct 19 to the outside air processing air conditioner 18 side. A control signal is generated and transmitted to the damper 20. Then, based on the control signal transmitted from the control signal generation unit 274, the damper 20 is closed.

When the warm-up operation is started, the CO ₂ concentration measured by the CO ₂ sensor is acquired by the measurement value acquisition unit 272 of the DDC 27 and monitored by the control signal generation unit 274. When the control signal generator 274 detects that the CO ₂ concentration increases due to the presence of persons in the rooms A and B to be controlled and exceeds a preset upper limit value (S3), Since it is necessary to ventilate by taking in outside air, outside air processing is started (S4). The start of outside air processing in the DDC 27 is transmitted to the DDC 16 and detected by the outside air processing state monitoring unit 163.

  When the outside air processing is started in the DDC 27, the air conditioned by the return air processing air conditioner 11 and the air conditioned by the outside air processing air conditioner 18 are mixed and supplied to the rooms A and B as supply air. Be controlled.

As a specific process when it is detected that the CO ₂ concentration has exceeded the upper limit and the outside air process is started, first, in the control signal generation unit 274 of the DDC 27, a control signal for opening the damper 20 is provided. It is generated and transmitted to the damper 20, and the damper 20 is opened.

  Further, in the control signal generation unit 274, based on the measurement values acquired by the measurement value acquisition unit 272 from the indoor temperature sensors 28 and 30, the indoor humidity sensors 29 and 31, the outdoor air temperature sensor 32, and the outdoor air humidity sensor 33, A control signal for controlling the amount of cold water supplied to 183, a control signal for controlling the amount of hot water supplied to hot water coil 184, and a control signal for controlling the amount of steam supplied to steam coil 185 are generated to generate cold water coil 183 and hot water coil. 184 and steam coil 185, respectively. In the cold water coil 183, the hot water coil 184, and the steam coil 185, the taken-in outside air is air-conditioned with cold water, hot water, and steam supplied in amounts based on the control signal transmitted from the control signal generation unit 274.

  Further, in the control signal generation unit 274, based on the preset target static pressure value in the air supply duct 21, the measurement value acquired from the pressure sensor 22 by the measurement value acquisition unit 272, and the control state of the inverter 112 by the DDC 16. A control signal for controlling the inverter 182 is generated and transmitted to the inverter 182. Then, based on the control signal transmitted from the control signal generator 274, the inverter 182 is operated and the rotation of the fan 181 is controlled.

  Here, since the outside air processing is started from the state where only the air that has undergone the return air treatment is supplied to the rooms A and B to be controlled, the air that has undergone the return air treatment and the air that has undergone the outside air treatment are When the mixture is switched to the state in which the air is supplied to the rooms A and B, the static pressure in the ducts and the rooms A and B to be controlled may temporarily change suddenly. The operation of the return air processing air conditioner 11 and the outside air processing air conditioner 18 when these static pressures change will be described.

  First, when the measured value of the pressure sensor 22 temporarily decreases due to the damper 20 being in the open state, an inverter is used by the DDC 16 to maintain the static pressure in the air supply duct 21 at the set target static pressure value. Control is performed to increase the rotation speed of the fan 111 by increasing the frequency 112.

  On the other hand, since the pressure of the air sent by the return air processing air conditioner 11 is applied to the duct 19, when the outside air processing is started and air that has been processed by the outside air processing air conditioner 18 is to be sent, the duct 19. It is necessary to push the air into the air that has undergone the return air treatment, and a large load is applied to the inverter 182, but the pressure of the air fed from the return air treatment air conditioner 11 increases as the number of rotations of the fan 111 increases as described above. In order not to be defeated by this, the frequency of the inverter 182 is further rapidly increased by the DDC 27, and there is a high possibility that the torque of the fan 181 will be insufficient.

  Further, when the opening degree of the damper 20 is controlled by the DDC 27, it is controlled so as to reach the target opening degree over several seconds to several tens of seconds by the motor, but the inverter 182 is instantly based on the control signal. Therefore, the desired control state is not achieved.

  Therefore, in the present embodiment, since the outside air processing is started from the state where only the air that has undergone the return air treatment is supplied to the rooms A and B to be controlled, the outside air treatment is performed with the air that has undergone the return air treatment. Are switched to a state where the air is mixed and supplied to the rooms A and B, the target static pressure value of the air supply duct 21 held in the control signal generation unit 164 of the DDC 16 and the control signal generation unit 274 of the DDC 27. Is reduced for a predetermined time, and each control signal is generated based on this (S5, S6).

  Thus, by reducing the target static pressure value for a certain period of time and generating each control signal, the DDC 16 does not first control to increase the frequency of the inverter 112. Therefore, it is not necessary to increase the frequency of the inverter 182 when the air treated by the outside air processing air conditioner 18 is sent in, the torque of the fan 181 does not become insufficient, and the air that has been returned to the air by the return air processing air conditioner 11 is eliminated. And the air treated by the outside air treatment air conditioner 18 are smoothly mixed according to the change in the opening degree of the damper 20 and supplied from the air supply duct 21 to the rooms A and B. Fluttering is suppressed and smooth control is performed.

  At this time, the opening degree of the damper 20 increases over several seconds to several tens of seconds, and when the target opening degree is reached, the air that has undergone the return air treatment and the air that has undergone the outside air treatment are smoothly mixed and almost stabilized. Therefore, the predetermined time for decreasing the target static pressure value is set in advance according to the time until the opening degree of the damper 20 reaches the target opening degree.

  After the set fixed time has elapsed, the target static pressure value of the air supply duct 21 held in the control signal generation unit 164 of the DDC 16 and the control signal generation unit 274 of the DDC 27 returns to the original set value step by step. In response to this, each control signal is generated. Here, if the target set value of the air supply duct 21 is returned to the original set value at a stroke rather than stepwise, the static pressure in the air supply duct 21 changes suddenly, and the air supply amount increases rapidly and the occupant is present. This is not preferable because it causes discomfort.

  Next, when it is determined during the air conditioning control process that the control signal generation unit 274 switches to the outside air cooling operation based on various measurement values acquired by the measurement value acquisition unit 272 of the DDC 27 (S7). Is detected by the outside air processing state monitoring unit 163 of the DDC 16.

  When the determination to switch to the outside air cooling operation is detected by the outside air processing state monitoring unit 163 of the DDC 16, a control signal for keeping the damper 13 in the closed state is generated by the control signal generation unit 164 and transmitted to the damper 13. Is closed.

  In addition, the generation of the control signal transmitted to the cold water coil 113, the hot water coil 114, and the steam coil 115, which has been performed for the return air processing in the control signal generation unit 164, is stopped, and the return air processing air conditioner 11 is used as a heat load. Operates as a discharger that operates with no load (S8). By stopping the generation of these control signals, only the air that has been subjected to outside air control is supplied to the rooms A and B to be controlled.

  After the outside air cooling operation is started, when the cooling load increases due to a rise in outside air temperature or the like and exceeds the air conditioning processing capacity of the outside air processing air conditioner 18 alone, the return air processing is started. The determination is made in the signal generation unit 274, and a return air processing start instruction is transmitted to the outside air processing state monitoring unit 163 of the DDC 16 (S9).

  When the return air processing start instruction is detected by the outside air processing state monitoring unit 163 of the DDC 16, the control signal generation unit 164 generates a control signal for opening the damper 13 and transmits it to the damper 13, and the damper 13 is opened. Put into a state. Further, in the control signal generation unit 164 of the DDC 16, the return air process is started in the same manner as in step S2 (S10). The start of the return air processing in the DDC 16 is notified to the DDC 27 and detected by the return air processing state monitoring unit 273.

  Here, since the return air process is started from the state where only the air subjected to the outside air process is supplied to the rooms A and B to be controlled, the return-air processed air and the outside-air processed air are When switching to a state in which the air is supplied to the rooms A and B, the air that has been subjected to the return air treatment and the air that has undergone the outside air treatment are mixed from the state in which only the air that has undergone the return air treatment is supplied. As in the case of switching to a state in which air is supplied, there is a possibility that the static pressure in each duct and the rooms A and B to be controlled changes temporarily and abruptly.

  Therefore, similarly to the processes in steps S5 and S6, when the air after the return air process and the air after the outside air process are mixed and switched to the state where the air is supplied to the rooms A and B, the control signal generation unit of the DDC The target static pressure value of the air supply duct 21 held in the control signal generation unit 274 of the 164 and the DDC 27 is lowered for a certain time, and each control signal is generated based on the target static pressure value (S11, S12).

  In this way, by reducing the target static pressure value for a certain period of time and generating each control signal, the air that has undergone the return air treatment by the return air treatment air conditioner 11 does not occur as in the case described above, and the fan 111 does not have insufficient torque. And the air treated by the outside air treatment air conditioner 18 are smoothly mixed according to the change in the opening degree of the damper 20 and supplied from the air supply duct 21 to the rooms A and B. Fluttering is suppressed and smooth control is performed. Further, the target static pressure value of the air supply duct 21 is also gradually returned to the original setting state as in the case described above, and each control signal is generated accordingly.

  Further, during the air conditioning control process, whether or not a control signal for performing humidity control is generated in the control signal generation unit 164 based on various measurement values acquired by the measurement value acquisition unit 162 of the DDC 16 is determined by the DDC 27. Is monitored by the return air processing state monitoring unit 273.

  Accordingly, when the return signal processing state monitoring unit 273 of the DDC 27 detects that the generation of the control signal for performing the humidity control by the control signal generation unit 164 of the DDC 16 is detected (S13), the control signal generation of the DDC 27 is performed. The humidity control is turned off in the unit 274 so that a control signal for performing the humidity control is not generated (S14).

  When the return signal processing state monitoring unit 273 of the DDC 27 detects that the generation of the control signal for performing the humidity control in the control signal generation unit 164 of the DDC 16 is stopped (S15), the control signal generation unit of the DDC 27 In 274, the humidity control is returned to the ON state, and generation of a control signal for performing the humidity control is resumed (S15).

  By processing in this way, for example, overshooting during the humidification process in the return air processing air conditioner 11 can be prevented, and wasteful energy consumption such as the dehumidification process being performed in the outside air processing air conditioner 18 can be prevented. it can.

  According to the above embodiment, efficient and smooth air-conditioning control is performed by linking the DDC that controls the return air process and the DDC that controls the outside air process, and monitoring the control states of various devices. be able to.

  In the present embodiment, the case where the time during which the target static pressure value is reduced by the DDC 16 and the DDC 27 is set to “a certain time” has been described. However, as described above, this is set according to the time for the damper to reach the target opening. Therefore, it is not constant and may be “time until the damper reaches the target opening degree”.

  Further, in the present embodiment, there is further provided an arithmetic processing unit that calculates the target temperature and the target humidity of the room to be controlled so that the room comfort index (PMV) value is within a comfortable range. A control signal may be generated by each DDC based on the calculated target temperature and target humidity.

  In the present embodiment, the case where the steam coil is installed as the equipment for performing humidity control in the return air processing air conditioner and the outside air processing air conditioner has been described, but the equipment is installed so as to perform humidification with water spray. May be.

DESCRIPTION OF SYMBOLS 1 ... Air conditioning control system 11 ... Return air processing air conditioner 12, 14, 19 ... Duct 13, 15, 20 ... Damper 16, 27 ... DDC
17 ... CO ₂ concentration sensor 18 ... outside air processing air conditioner 21 ... air supply ducts 22 ... pressure sensor 23 ... supply air temperature sensor 24 ... supply air humidity sensor 25, 26 ... air supply unit 28, 30 ... indoor temperature sensor 29, 31 ... Indoor humidity sensor 32 ... Outside air temperature sensor 33 ... Outside air humidity sensor 34 ... Central controller 111 ... Fan 112 ... Inverter 113 ... Cold water coil 114 ... Hot water coil 115 ... Steam coil 161 ... Operation instruction acquisition part 162 ... Measurement value acquisition part 163 ... outside air processing state monitoring unit 164 ... control signal generation unit 181 ... fan 182 ... inverter 183 ... cold water coil 184 ... hot water coil 185 ... steam coil 271 ... operation instruction acquisition unit 272 ... measurement value acquisition unit 273 ... return air processing state monitoring unit 274 ... Control signal generator

Claims (3)

It has a target static pressure value in an air supply duct that allows air to be supplied to the air conditioning control target room, air-conditioning the return air taken in from the air conditioning control target room, and an air volume based on the target static pressure value. A first control device that performs return air control to be sent to the air supply duct, and is connected to the first control device, takes in outside air, performs air-conditioning processing, and sends the air to the air supply duct with an air volume based on the target static pressure value. In an air conditioning control system including a second control device that performs outside air control,
The first control device and the second control device are:
From the state in which only one of the air that has been air-conditioned by the return air control and the air that has been air-conditioned by the outside air control is supplied to the air-conditioning control target room, the air-conditioning has been performed by the return air control. When the air and air that has been air-conditioned by the outside air control are mixed and switched to a state in which the air is supplied to the air-conditioning control target room, a control signal for executing the control by lowering the target static pressure value for a predetermined time is generated. Having a control signal generation unit for generating,
An air conditioning control system characterized by that. The predetermined time for lowering the target static pressure value is when the air that has been air-conditioned by the return air control and the air that has been air-conditioned by the outside air control are mixed and supplied to the air-conditioning control target room. The air conditioning control system according to claim 1, further comprising a time until the damper that is opened from the closed state reaches the target opening. A first control device that performs return air control for air-conditioning the return air taken in from a room subject to air-conditioning control, and a first controller that is connected to the first control device and performs outside air control for air-conditioning processing by taking in outside air. In an air conditioning control system with two control devices,
The second control device includes:
A control signal generation unit that stops generating a control signal for control related to humidity in the own device when detecting that control related to humidity is being executed in the first control device;
An air conditioning control system characterized by that.

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