JP2009047379A - Indoor atmospheric pressure control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indoor atmospheric pressure control system capable of preventing unnecessary rising or descending of indoor atmospheric pressure after reaching a target atmospheric pressure and promptly stabilizing the indoor atmospheric pressure to the target atmospheric pressure. <P>SOLUTION: In the indoor atmospheric pressure control system, a controller 15 executes an opening movement starting means for making a motor damper 29 start opening movements of its swirl vane 31 after passing a predetermined waiting time from the time of receiving start signals of an air supply fan 24 and an exhaust fan 28, a first opening adjusting means for making the motor damper 29 continuously or gradually increase opening of the swirl vane 31 to a first opening corresponding to the target atmospheric pressure of a room 11 until the indoor atmospheric pressure of the room 11 reaches the target atmospheric pressure, and a first opening maintaining means for making the damper 29 maintain the opening of the swirl vane 31 at the first opening for a predetermined time after the opening of the swirl vane 31 reaches the first opening. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an indoor air pressure control system that maintains the indoor air pressure of a room at a target air pressure by adjusting the opening of swirl vanes of a damper device.

An air supply amount adjusting means for adjusting the air supply amount for a plurality of target rooms to a target air supply amount by adjusting the opening degree of the damper device, and adjusting the opening amount of the damper device to adjust the exhaust amount from the target chamber. There is an indoor air pressure control device having an indoor air pressure adjusting means for adjusting the indoor air pressure of the target chambers to a target air pressure, and a setting means for setting the required room pressure of the target rooms (see Patent Document 1). This indoor atmospheric pressure control device sets the target atmospheric pressure for these target chambers to normal pressure until the predetermined time has elapsed from the start of the air supply / exhaust device, and after the predetermined time has elapsed since the target atmospheric pressure was set to normal pressure, All the target atmospheric pressures for the target room are simultaneously changed from the normal pressure to the required atmospheric pressure set by the setting means. This indoor air pressure control device can prevent an indoor air pressure reversal phenomenon in which the indoor air pressure of a target room having a high required room pressure becomes lower than that of a target room having a low required room pressure at the start of the air supply / exhaust operation. .
JP-A-4-350433

  The indoor air pressure control device disclosed in Patent Document 1 uses a damper mechanism so that the target air pressure for the target chamber is normal pressure until the predetermined time elapses from the start of the air supply / exhaust operation, and matches the normal pressure. The target air pressure is adjusted from the normal pressure to the required room pressure at the same time after the predetermined time has elapsed since the start of the air supply / exhaust operation, so that it matches the required room pressure. The opening degree of the damper mechanism is adjusted by feedback control.

  However, feedback control applies feedback to suppress the increase (disturbance) on the condition that the indoor air pressure continues to rise even after the indoor air pressure in the target room reaches the target air pressure. Unable to prevent an unnecessary increase in the room pressure after reaching the target pressure. In this indoor air pressure control device, the indoor air pressure in the target room fluctuates up and down across the target air pressure and finally becomes the target air pressure, so it takes a long time for the indoor air pressure to stabilize at the target air pressure. Note that an increase or decrease in the target room's indoor air pressure above the target pressure may adversely affect the target room physically or mechanically, such as destroying the airtightness of the target room or causing air leakage from the target room. .

  An object of the present invention is to provide an indoor pressure control system that can prevent an unnecessary increase or decrease in indoor pressure after reaching a target pressure, and can stabilize the indoor pressure to the target pressure at an early stage. .

  The premise of the present invention to solve the above-mentioned problems is that a constant air volume adjusting device that is connected to an air supply device that supplies air to a chamber of a predetermined volume and holds the air amount supplied to the chamber constant, and a swirling blade A damper device that has an air flow path that is opened and closed by swirling, and that can adjust the amount of air discharged from the chamber; and a controller that adjusts the opening of the swirling blades of the damper device to maintain the room air pressure in the chamber at the target pressure. Is an indoor pressure control system.

  The feature of the present invention based on the above premise is that the controller starts the opening operation of the swirl blade after the predetermined waiting time has elapsed from the time when the start signal of the air supply device is received, and the indoor air pressure of the chamber Until the target pressure is reached, the damper device has opening degree first adjusting means for gradually increasing the opening degree of the swirl blade toward the first opening degree corresponding to the target atmospheric pressure of the chamber.

  As an example of the present invention, the controller includes an opening first maintaining means for causing the damper device to maintain the opening degree of the swirl blade at the first opening for a predetermined time after the opening degree of the swirl blade reaches the first opening degree. The opening degree of the swirl vane is made to correspond to the fluctuation of the indoor air pressure of the room so that the indoor air pressure of the room can be maintained at the target air pressure after a predetermined time has passed since the first opening degree maintaining means is executed. Feedback first adjusting means for arbitrarily changing.

  As another example of the present invention, in the first opening degree adjusting means, the controller causes the damper device to set the opening degree of the swirl blade to the first opening degree continuously or stepwise over a predetermined time.

  As another example of the present invention, the controller may be configured so that a predetermined standby time has elapsed since the supply air volume change signal of the air supply device has been received, and the room air pressure has changed from the change in the air supply air volume of the air supply device to the target air pressure. In the meantime, the damper device has opening degree second adjusting means for gradually increasing or decreasing the opening degree of the swirl blade toward the second opening degree for returning the target air pressure from the change of the supply air flow rate.

  As another example of the present invention, the controller causes the damper device to maintain the opening degree of the swirl vane at the second opening degree for a predetermined time after the opening degree of the swirl vane reaches the second opening degree. And the opening of the swirl blade in response to fluctuations in the room air pressure so that the room air pressure in the chamber can be maintained at the target air pressure after a predetermined time has passed since the second opening degree maintaining means is executed. Feedback second adjusting means for arbitrarily changing the degree.

  As another example of the present invention, in the opening degree second adjusting means, the controller causes the damper device to set the opening degree of the swirl blade to the second opening degree continuously or stepwise over a predetermined time.

  According to the indoor air pressure control system of the present invention, the damper device located on the exhaust side starts the opening operation of the swirl blade after a predetermined waiting time has elapsed since the start signal of the air supply device was received. Immediately after receiving the activation signal, it is possible to prevent the chamber pressure of the chamber from temporarily becoming negative as compared with the case where the swirl vane of the damper device starts the opening operation. In this indoor pressure control system, the opening degree of the swirl blades of the damper device located on the exhaust side is moved toward the first opening degree corresponding to the target atmospheric pressure of the chamber until the indoor atmospheric pressure of the room reaches the target atmospheric pressure. Compared with feedback control, the room pressure does not increase significantly from the target pressure after the room pressure reaches the target pressure, and an unnecessary increase in the room pressure can be prevented. The target pressure can be stabilized. This indoor air pressure control system does not increase the room air pressure from the target air pressure at the time of startup, so that the air tightness of the room is broken or air leaks from the room. There is no mechanical adverse effect.

  First opening means for maintaining the opening of the swirl vane at the first opening for a predetermined time, and corresponding to fluctuations in the room air pressure so that the room air pressure can be maintained at the target air pressure against disturbance. The indoor air pressure control system having the feedback first adjusting means for arbitrarily changing the opening degree of the swirl vane has the first opening degree after the opening degree of the swirl vane reaches the first opening degree. By maintaining for a predetermined time, the indoor pressure of the chamber can be reliably set to the target pressure. This indoor air pressure control system performs feedback control to arbitrarily change the opening of the swirl blade in response to a change in the indoor air pressure of the chamber after a predetermined time has elapsed since the execution of the first opening degree maintaining means. Thus, even if the indoor pressure in the room fluctuates up and down across the target pressure, the indoor pressure in the room can be quickly restored to the target pressure.

  In the indoor air pressure control system in which the opening degree of the swirl blade is set to the first opening degree continuously or stepwise over a predetermined time, the increase amount of the indoor air pressure toward the target air pressure becomes substantially uniform, and the indoor air pressure becomes substantially constant. While increasing, the indoor atmospheric pressure of the room can be set to the target atmospheric pressure. When the opening degree of the swirl vane is instantaneously set to the first opening degree, the indoor air pressure rapidly increases. However, in this indoor air pressure control system, since the indoor air pressure gradually increases over a predetermined time, the indoor air pressure rapidly increases. By doing so, it is possible to reliably prevent adverse physical and mechanical effects on the chamber.

  An indoor air pressure control system having an opening degree second adjusting means for gradually increasing or decreasing the opening degree of the swirling blades of the damper device toward the second opening degree to return the target air pressure from the change in the air supply amount is provided by the air supply device. The damper located on the exhaust side after a predetermined waiting time has elapsed since the reception of the air supply air volume change signal and before the room air pressure in the chamber returns from the change in the air supply air volume to the target air pressure. Since the opening of the swirl blade is gradually increased or decreased toward the second opening for returning the target air pressure from the change in the supply air volume, the change in the supply air volume of the air supply apparatus is compared with the feedback control. Later, the indoor air pressure in the room does not increase or decrease significantly from the target air pressure, and an unnecessary increase in the room pressure or a decrease in the room pressure can be prevented. Even if the supply air volume of the air supply device is changed, the room air pressure To target room pressure early Succoth can. This indoor air pressure control system does not greatly increase or decrease the target air pressure from the target air pressure during its operation, so the air tightness of the room is destroyed or air leaks from the room. There is no adverse physical or mechanical effect.

  The opening degree second maintaining means for maintaining the opening degree of the swirl vane at the second opening degree for a predetermined time, and corresponding to the fluctuation of the room indoor pressure so that the room air pressure can be maintained at the target pressure against disturbance. The indoor air pressure control system having the feedback second control adjustment for arbitrarily changing the opening degree of the swirl vane, the opening degree of the swirl vane is changed to the second opening degree after the opening degree of the swirl vane reaches the second opening degree. By maintaining for a predetermined time, even if the supply air volume of the air supply device is changed, the indoor atmospheric pressure of the chamber can be reliably returned to the target atmospheric pressure. Since this indoor air pressure control system performs feedback control to arbitrarily change the opening of the swirl blade in response to a change in the indoor air pressure of the room after a predetermined time has elapsed since the execution of the second opening degree maintaining means, Thus, even if the indoor pressure in the room fluctuates up and down across the target pressure, the indoor pressure in the room can be quickly restored to the target pressure.

  The indoor air pressure control system in which the opening degree of the swirl blade is set to the second opening degree continuously or stepwise over a predetermined time, the amount of increase or decrease of the indoor air pressure toward the target air pressure becomes substantially uniform, and the indoor air pressure is reduced. While increasing or decreasing substantially constant, the indoor pressure of the chamber can be returned to the target pressure. When the opening degree of the swirl vane is instantaneously set to the second opening degree, the indoor atmospheric pressure rapidly rises or falls. This indoor atmospheric pressure control system gradually increases or decreases over a predetermined time. It is possible to reliably prevent the physical and mechanical adverse effects on the chamber due to the sudden rise or fall of.

  The details of the indoor pressure control system according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of an indoor pressure control system 10 shown as an example. In FIG. 1, the chamber 11 is shown from the side. Although only one room 11 is shown in FIG. 1, the number of rooms is not limited to one, and the indoor pressure control system 10 can be applied to a building formed of a plurality of rooms.

  This indoor atmospheric pressure control system 10 includes an air supply mechanism 12 that supplies air to a chamber 11 having a predetermined volume, an exhaust mechanism 13 that exhausts air from the chamber 11, and a pressure that measures the indoor atmospheric pressure of the chamber 11 over time. The sensor 14 and the controller 15 (control device) are formed. The chamber 11 is surrounded by a ceiling 16 and a floor 17, front and rear walls 18 and 19, and side walls 20. The ceiling 16 is provided with an air supply port (not shown) for taking the air supplied from the air supply mechanism 12 into the chamber 11. The side wall 20 is provided with an exhaust port 21 for exhausting air from the inside of the chamber 11 by the exhaust mechanism 13. A door 22 for entering and exiting the chamber 11 is installed on the front wall 18. In this system 10, the indoor pressure of the chamber 11 is maintained at a preset target pressure during operation.

  The air supply mechanism 12 includes an air supply duct 23 (air supply conduit) that allows air to flow into the chamber 11 and an air supply fan 24 (supply air) that forcibly blows (supply) a predetermined amount of air into the chamber 11. And a constant air volume unit 25 (constant air volume adjusting device) for supplying a constant amount of air to the chamber 11. The air supply duct 23 is disposed above the ceiling 16 and is connected to an air supply port provided on the ceiling 16. The air supply fan 24 and the constant air volume unit 25 are attached to the air supply duct 23. Predetermined power is supplied to the air supply fan 24 and the constant air volume unit 25 via a track (not shown). The air supply fan 24 is connected to the controller 15 via an interface 26 (wireless or wired). The air supplied from the air supply fan 24 enters the constant air volume unit 25 through the air supply duct 23, and flows into the chamber 11 from the unit 25 through the duct 23. The constant air volume unit 25 adjusts the amount of air passing through the unit 25 in response to fluctuations in the internal air pressure of the air supply duct 23, and always maintains the air volume supplied to the chamber 11 constant.

  The exhaust mechanism 13 includes an exhaust duct 27 (exhaust duct) that allows air to flow out of the chamber 11 to the outside, an exhaust fan 28 (exhaust device) that forcibly exhausts (exhausts) a predetermined amount of air from the chamber 11, A motor damper 29 (damper device) capable of adjusting the amount of air discharged from the chamber 11 is formed. The exhaust duct 27 is disposed below the floor 17 and is connected to an exhaust port 21 provided in the side wall 20. The exhaust fan 28 and the motor damper 29 are attached to the exhaust duct 27. Predetermined power is supplied to the exhaust fan 28 and the motor damper 29 via a line (not shown). The exhaust fan 28 is connected to the controller 15 through the interface 26. The air that has flowed into the chamber 11 enters the motor damper 29 through the exhaust duct 27, flows into the exhaust fan 28 through the duct 27 from the damper 29, and is then released to the outside.

  The motor damper 29 includes a modular roll motor (not shown), a control unit 30 that controls the rotation of the motor, a swirl blade 31 that is swung by the driving force of the motor, and an air flow path that is opened and closed by swirling the swirl blade 31 ( (Not shown). The control unit 30 of the damper 29 is connected to the controller 15 via the interface 26. In the motor damper 29, the module roll motor is rotated by a control signal from the control unit 30, and the swirl vane 31 is swung at a predetermined angle, and the amount of air passing through the air channel by adjusting the opening of the vane 31 with respect to the air channel. Adjust. For the motor damper 29, a parallel blade damper or a counter blade damper can be used. The pressure sensor 14 is installed inside the chamber 11 and is connected to the controller 15 via the interface 26. Predetermined electric power is supplied to the damper 29 and the sensor 14 via a track (not shown).

  The controller 15 is a computer having a central processing unit (CPU or MPU) that performs predetermined control and calculation and a main storage (memory) that stores various data. The controller 15 is supplied with predetermined power via a line (not shown). The controller 15 is installed outside the room, but may be installed inside the room 11. Further, it may be installed directly on the motor damper 29 and directly connected to or built in the control unit 30 of the damper 29, and the control unit 30 may also serve as the controller 15. Although not shown, the controller 15 is connected to an input device such as an ON / OFF switch and a key unit, and an output device such as a printer and a display via an interface.

  When the system 10 is activated, activation signals (ON signals) are output from the air supply fan 24 and the exhaust air fan 28, and the activation signals are input to the controller 15. During operation of the system 10, the actually measured room pressure signal of the chamber 11 measured by the pressure sensor 14 is constantly output from the sensor 14, and the actually measured room pressure is input to the controller 15. Further, the opening degree of the swirl blade 31 is constantly output from the control unit 30 of the motor damper 29, and the opening degree is input to the controller 15. Further, when the air supply amount of the air supplied from the air supply fan 24 is changed, the changed air air amount is output from the air supply fan 24, and the changed air air amount is input to the controller 15. . When the system 10 is stopped, a stop signal (OFF signal) is output from the air supply fan 24 and the exhaust fan 28, and the stop signal is input to the controller 15.

  The central processing unit of the controller 15 starts the room pressure control application from the command file of the main storage device based on the control by the operating system stored in the main storage device, and the following means according to the started room pressure control application Execute. When the central processing unit receives an activation signal (ON signal) from at least the air supply fan 28 of the air supply fan 24 and the exhaust air fan 28 when the system 10 is activated, the central processing unit receives a predetermined signal from the time when the activation signal is received. After the first waiting time elapses, an opening operation starting means for causing the motor damper 29 to start opening the swirl vane 31 and a period from when the swirl vane 31 starts the opening operation until the room air pressure in the chamber 11 reaches the target pressure. In addition, the opening degree first adjusting means for causing the motor damper 29 to gradually increase the opening degree of the swirl blade 31 toward the first opening degree corresponding to the target atmospheric pressure of the chamber 11 is executed.

  The first standby time includes various conditions such as the volume of the chamber 11, the supply air volume (air volume) supplied from the supply fan 24, the exhaust air volume (air volume) exhausted from the exhaust fan 28, and the target pressure. And is stored in the main memory of the controller 15. The first waiting time is preferably in the range of 1 to 30 seconds, and more preferably in the range of 1 to 5 seconds. However, the first waiting time is not particularly limited, and the first waiting time may be omitted. The first waiting time can be freely set and changed via the key unit of the controller 15. When the first waiting time is changed, the central processing unit of the controller 15 rewrites the first waiting time before the change to the first waiting time after the change, and stores the first waiting time after the change in the main storage device. . The central processing unit continues to use the first standby time stored in the main storage device most recently unless the first standby time is changed.

  The first opening is calculated in advance based on the target atmospheric pressure of the chamber 11, the amount of air supplied to the chamber 11, and the amount of air discharged from the chamber 11. The main storage device of the controller 15 stores a target atmospheric pressure-first opening curve (not shown) that displays the first correlation between the target atmospheric pressure of the chamber 11 and the first opening. The target atmospheric pressure of the chamber 11 is not particularly limited, and the target atmospheric pressure can be appropriately set depending on the use of the chamber 11, the volume of the chamber 11, the degree of opening / closing of the door 22, and the like. There is no particular limitation on the use and volume of the chamber 11. The target atmospheric pressure can be freely set and changed via the key unit of the controller 15.

  When the target air pressure is changed, the central processing unit of the controller 15 rewrites the target air pressure before the change to the target air pressure after the change, and stores the target air pressure after the change in the main storage device. Furthermore, referring to the target atmospheric pressure-first opening curve (first correlation) stored in the main memory, the first opening corresponding to the changed target atmospheric pressure is based on the target atmospheric pressure-first opening curve. In addition to determining the degree, the first opening before the change is rewritten to the first opening after the change, and the first opening after the change is stored in the main memory. The central processing unit continues to use the most recently determined first opening unless the target atmospheric pressure is changed.

  In the first opening degree adjusting means, the opening degree of the swirl vane 31 is changed to the first opening degree continuously or stepwise over a first predetermined time. The opening degree of the swirl blade 31 of the motor damper 29 is a numerical value indicating the degree of opening of the blade 31 in percentage (%) when the fully closed state of the blade 31 is 0 and the fully open state of the blade 31 is 100. The first predetermined time includes various conditions such as the volume of the chamber 11, the supply air volume (air volume) supplied from the supply fan 24, the exhaust air volume (air volume) exhausted from the exhaust fan 28, and the target pressure. And is stored in the main memory of the controller 15. The first predetermined time can be freely set and changed via the key unit of the controller 15. When the first predetermined time is changed, the central processing unit of the controller 15 rewrites the first predetermined time before the change to the first predetermined time after the change, and stores the first predetermined time after the change in the main storage device. . The central processing unit continues to use the first predetermined time stored in the main storage device most recently unless there is a change in the first predetermined time.

  For example, when the first opening is 60% when the fully opened state of the swirl vane 31 is 100, the first opening is within the first predetermined time and the opening is from 0%. The blades 31 are continuously opened until reaching 60%. Further, the stepwise opening of the first opening means that the swirl blade 31 is intermittently opened until the opening reaches 0% to 60% within the first predetermined time. For example, in the case where the swirl vane 31 performs a three-stage opening operation, the opening operation is temporarily stopped when the opening degree reaches from 0% to 20% as the first stage. As a second stage, the revolving blade 31 is caused to perform the opening operation again, and the opening operation is temporarily stopped when the opening degree reaches 20% to 40%. Further, as a third stage, the swirl vane 31 is again opened and stopped when the opening degree reaches 40% to 60%. In addition, there is no limitation in particular in the frequency | count when opening operation is performed in steps in the opening degree 1st adjustment means. The number of times when the opening operation is performed stepwise is stored in the main storage device of the controller 15. The number of times can be freely set and changed via the key unit of the controller 15.

  The central processing unit of the controller 15 maintains the opening degree of the blade 31 at the first opening degree for the second predetermined time after the opening degree of the swirling blade 31 of the motor damper 29 reaches the first opening degree. And after the second predetermined time has elapsed since the execution of the first opening degree maintaining means, it is made to respond to fluctuations in the indoor air pressure of the chamber 11 so that the indoor air pressure of the chamber 11 can be maintained at the target atmospheric pressure against disturbance. Then, feedback first adjusting means for causing the motor damper 29 to change the opening degree of the swirl blade 31 from the first opening degree to an arbitrary opening degree is executed.

  The second predetermined time in the opening degree first maintaining means includes the volume of the chamber 11, the supply air amount (air amount) supplied from the supply fan 24, and the exhaust air amount (air amount) exhausted from the exhaust fan 28. Depending on various conditions such as the target atmospheric pressure, it is stored in the main storage device of the controller 15. The second predetermined time is preferably in the range of 5 seconds to 5 minutes, more preferably in the range of 5 seconds to 3 minutes, but the second predetermined time is not particularly limited. The second predetermined time can be freely set and changed via the key unit of the controller 15. When the second predetermined time is changed, the central processing unit of the controller 15 rewrites the second predetermined time before the change to the second predetermined time after the change, and stores the second predetermined time after the change in the main storage device. . The central processing unit continues to use the second predetermined time stored in the main storage device most recently unless there is a change in the second predetermined time.

  In the feedback first adjusting means, the central processing unit of the controller 15 converts the target atmospheric pressure of the chamber 11 into a reference input signal (setting), and generates a control signal so that the controlled object performs a predetermined operation based on the deviation ( Adjustment). Further, the control signal is converted into an operation signal (operation amount) necessary for operation (operation), and the control amount when a disturbance is applied is detected and converted into a feedback amount of the same type as the reference input signal ( Detection), the feedback amount is fed back and compared with the reference input signal. In the feedback first adjusting means, the central processing unit of the controller 15 performs feedback control in which each element of setting, adjustment, operation, and detection forms a closed loop. Here, the operation amount is a voltage, current, or frequency for controlling the rotation of the modular roll motor of the motor damper 29, and the control target is the motor damper 29. The control amount is the opening degree of the swirl blade 31 of the motor damper 29 (the amount of air passing through the air flow path of the damper 29 depending on the opening degree of the blade 31). The deviation is a difference between the target atmospheric pressure and the feedback amount, and is an operation signal that corrects the control amount. The control operation of feedback control is PID control.

  The central processing unit of the controller 15 changes the supply air amount of the air supply fan 24 during the operation of the system 10 (while the air supply fan 24 and the exhaust air fan 28 are operating). After a predetermined second waiting time has elapsed since the supply air volume change signal of the air blower 24 was received, and until the room air pressure in the chamber 11 returns from the change in the air supply air volume of the air supply fan 24 to the target air pressure. In addition, the opening degree second adjusting means for causing the motor damper 29 to gradually increase or decrease the opening degree of the swirl blade 31 toward the second opening degree for returning to the target atmospheric pressure from the change of the supply air flow rate is executed.

  The second waiting time includes the volume of the chamber 11, the changed supply air amount (air amount) supplied from the supply fan 24, the exhaust air amount (air amount) exhausted from the exhaust fan 28, the target pressure, etc. It is stored in the main storage device of the controller 15 depending on various conditions. The second waiting time is preferably in the range of 1 to 30 seconds, and more preferably in the range of 1 to 5 seconds. However, the second waiting time is not particularly limited, and the second waiting time may be omitted. The second waiting time can be freely set and changed via the key unit of the controller 15. When the second waiting time is changed, the central processing unit of the controller 15 rewrites the second waiting time before the change to the second waiting time after the change, and stores the second waiting time after the change in the main storage device. . The central processing unit continues to use the second standby time stored in the main storage device most recently unless the second standby time is changed.

  The second opening degree is obtained in advance by calculation based on the amount of change in the target air pressure in the chamber 11 and the amount of air supplied from the air supply fan 24. The main storage device of the controller 15 displays the second correlation between the amount of change in the supply air amount and the second opening of the swirl vane 31 of the motor damper 29 for returning the room air pressure to the target air pressure from the amount of change. A supply air flow rate change amount-second opening degree curve is stored. When the air supply amount of the air supply fan 24 is changed, the central processing unit of the controller 15 rewrites the air supply amount before the change to the air supply amount after the change, and stores the air supply amount after the change in the main storage device. Store. Further, referring to the air supply air volume change amount-second opening curve (second correlation) stored in the main storage device, the air supply air volume change is changed based on the air supply air amount change-second opening curve. The second opening for returning the room pressure to the target pressure again is determined from the amount, and the second opening is stored in the main memory. The central processing unit continues to use the most recently determined second opening unless there is a change in the supply air volume of the supply fan.

  In the second opening degree adjusting means, the opening degree of the swirl vane 31 is changed to the second opening degree continuously or stepwise over a third predetermined time. The third predetermined time includes various conditions such as the volume of the chamber 11, the supply air volume (air volume) supplied from the supply fan 24, the exhaust air volume (air volume) exhausted from the exhaust fan 28, and the target pressure. And is stored in the main memory of the controller 15. The third predetermined time can be freely set and changed via the key unit of the controller 15. When the third predetermined time is changed, the central processing unit of the controller 15 rewrites the third predetermined time before the change to the third predetermined time after the change, and stores the third predetermined time after the change in the main storage device. . The central processing unit continues to use the third predetermined time most recently stored in the main storage device unless the third predetermined time is changed.

  For example, when the second opening is 60% when the fully opened state of the swirl blade 31 is 100 and the second opening is 90% or 30%, the second opening is continuously set. The swirl vane 31 is continuously opened within a third predetermined time until the degree reaches 60% (first opening) to 90% (second opening) or 30% (second opening). . In addition, the second opening is gradually set to be the third predetermined time until the opening reaches 60% (first opening) to 90% (second opening) or 30% (second opening). The revolving blade 31 is caused to open intermittently. For example, when making the swirl blade 31 perform the opening operation in three stages, the opening operation is temporarily stopped when the opening degree reaches 60% to 70% or 50% as the first stage. As a second stage, the revolving blade 31 is caused to perform the opening operation again, and the opening operation is temporarily stopped when the opening degree reaches from 70% to 80% or when the opening degree reaches from 50% to 40%. Further, as a third stage, the swirl vane 31 is opened again, and the opening operation is stopped when the opening degree reaches from 80% to 90% or when the opening degree reaches from 40% to 30%. In addition, there is no limitation in particular in the frequency | count when opening operation is performed in steps in the opening degree 2nd adjustment means. The number of times when the opening operation is performed stepwise is stored in the main storage device of the controller 15. The number of times can be freely set and changed via the key unit of the controller 15.

  The central processing unit of the controller 15 maintains the opening degree of the blade 31 at the second opening degree for the fourth predetermined time after the opening degree of the swirling blade 31 of the motor damper 29 reaches the second opening degree. And after the fourth predetermined time has elapsed since the execution of the second opening degree maintaining means, it is made to respond to fluctuations in the indoor air pressure of the chamber 11 so that the indoor air pressure of the chamber 11 can be maintained at the target atmospheric pressure against disturbance. Then, feedback second adjusting means for causing the motor damper 29 to change the opening degree of the swirl blade 31 from the second opening degree to an arbitrary opening degree is executed.

  The fourth predetermined time in the second opening degree maintaining means includes the volume of the chamber 11, the supply air amount (air amount) supplied from the supply fan 24, and the exhaust air amount (air amount) exhausted from the exhaust fan 28. Depending on various conditions such as the target atmospheric pressure, it is stored in the main storage device of the controller 15. The fourth predetermined time is preferably in the range of 5 seconds to 5 minutes, more preferably in the range of 5 seconds to 3 minutes, but the fourth predetermined time is not particularly limited. The fourth predetermined time can be freely set and changed via the key unit of the controller 15. When the fourth predetermined time is changed, the central processing unit of the controller 15 rewrites the fourth predetermined time before the change to the fourth predetermined time after the change, and stores the fourth predetermined time after the change in the main storage device. . The central processing unit continues to use the fourth predetermined time stored in the main storage device most recently unless the fourth predetermined time is changed. The feedback second adjusting means performs the same feedback control as the feedback first adjusting means.

  2 and 3 are diagrams illustrating an example of the correlation between the indoor pressure in the chamber 11 and the opening degree of the swirl blade 31 of the motor damper 29 according to the elapsed time. 2 and 3, the opening degree (%) of the swirl vane 31 of the motor damper 29, the chamber pressure (Pa) of the chamber 11, and the ON / OFF of the blowers 24 and 28 are represented on the vertical axis. The axis represents the elapsed time (seconds or minutes). 2 and 3 show the correlation between the indoor air pressure and the opening degree of the swirl blade 31 when the system 10 is activated. 2 and 3 show a case where the opening degree of the swirl vane 31 of the motor damper 29 is continuously set to the first opening, whereas FIG. 3 shows a swirl vane of the motor damper 29. The point is that the opening degree 31 is changed to the first opening degree step by step, and the other parts are the same.

  When the indoor pressure control system 10 is started by turning on the switch of the controller 15, the air blower 24 and the exhaust blower 28 are turned on, and power is supplied to the blowers 24 and 28 from the power source. 24 and 28 are activated. In addition, the motor damper 29 and the pressure sensor 14 are turned on, power is supplied to them from the power source, and they are activated. During operation of the system 10, as indicated by an arrow A <b> 1 in FIG. 1, a predetermined amount of air is supplied from the air supply duct 23 into the chamber 11 through the air supply fan 24. Even if pressure fluctuations occur in the air flowing inside the air supply duct 23 due to disturbance, the air flow rate of the duct 23 is kept constant by the constant air volume unit 25, and a constant amount of air is always kept inside the chamber 11. To be supplied.

  The supply air fan 24 and the exhaust air fan 28 output an activation signal to the controller 15 when activated. When the controller 15 receives the activation signals from the air supply fan 24 and the exhaust fan 28, the controller 15 does not immediately cause the motor damper 29 to open the swirl blade 31 in the fully closed state, and is denoted by reference numeral L1 in FIGS. As shown, the control unit 30 of the damper 29 waits for the opening operation of the swirl blade 31 until a predetermined first standby time elapses. When the first waiting time has elapsed, the controller 15 outputs an opening operation start command for starting the opening operation of the swirl vane 31 to the control unit 30 of the motor damper 29 (opening operation start means). The controller 15 refers to the first correlation stored in the main storage device, extracts the first opening corresponding to the target atmospheric pressure of the chamber 11 based on the first correlation, and sets the first opening to the damper 29. To the control unit 30.

  The controller 15 outputs a first predetermined time until the room air pressure in the chamber 11 reaches the target air pressure to the control unit 30 of the motor damper 29, and the opening degree of the swirl blade 31 is set to the first opening degree during the first predetermined time period. A first opening operation command to increase continuously or stepwise is output to the control unit 30 of the damper 29 (opening first adjusting means). Furthermore, after the first predetermined time has elapsed, the controller 15 outputs a second predetermined time, which is a time for maintaining the opening degree of the swirl vane 31 to the first opening degree, to the control unit 30 of the damper 29, and the opening degree is set. A first opening maintenance command for maintaining the first opening is output to the control unit 30 of the damper 29 (opening first maintaining means). The controller 15 determines that the opening degree of the blade 31 has reached the first opening degree based on the opening degree of the swirl blade 31 output from the control unit 30 of the motor damper 29, and then the second predetermined time and the first time. 1 opening degree maintenance command can also be outputted to control part 30 of damper 29 (opening 1st maintenance means).

  The control unit 30 of the motor damper 29 starts the modular roll motor according to the opening operation start command output from the controller 15, and starts the opening operation of the swirl blade 31 by the motor. When the swirl blade 31 starts the opening operation, the air flow path of the motor damper 29 is gradually opened, and air is discharged from the chamber 11 to the exhaust duct 27 via the exhaust fan 28 as shown by an arrow A2 in FIG. According to the first predetermined time and the first opening operation command output from the controller 15, the control unit 30 of the damper 29 continuously or in stages within the first predetermined time, as indicated by reference numeral L <b> 2 in FIGS. The swirl blade 31 is swirled to set the opening of the blade 31 to the first opening. Further, after the first predetermined time has elapsed, the control unit 30 of the damper 29 follows the second predetermined time output from the controller 15 and the first opening maintenance command, as indicated by reference numeral L3 in FIGS. Until the second predetermined time elapses, the opening degree of the swirl blade 31 is maintained at the first opening degree. The indoor atmospheric pressure gradually increases from 0 (Pa) during the first standby time and the first predetermined time, approaches the target atmospheric pressure, and enters the target atmospheric pressure range during the second predetermined time.

  Since the room pressure control system 10 causes the motor damper 29 to start the opening operation of the swirl blade 31 after the first waiting time has elapsed from the time when the start signals of the blowers 24 and 28 are received, the swirl blade 31 immediately after the start signal is received. Compared with the case where starts the opening operation, it is possible to prevent the chamber pressure of the chamber 11 from temporarily becoming negative. Further, the system 10 causes the motor damper 29 to gradually increase the opening degree of the swirl blade 31 toward the first opening degree corresponding to the target atmospheric pressure of the chamber 11 until the indoor atmospheric pressure of the chamber 11 reaches the target atmospheric pressure. Therefore, compared with the feedback control, the indoor pressure does not increase greatly from the target pressure after the indoor pressure in the chamber 11 reaches the target pressure, and an unnecessary increase in the room pressure can be prevented. It can be stabilized at atmospheric pressure. Since this system 10 does not significantly increase the indoor air pressure of the chamber 11 from the target air pressure at the time of starting, the system 10 is physically damaged in the chamber 11 such as destroying the airtightness of the chamber 11 or causing air leakage from the chamber 11. There is no mechanical adverse effect.

  The indoor pressure control system 10 sets the opening of the swirl vane 31 to the first opening continuously or stepwise over a first predetermined time, so that the amount of increase in the indoor pressure toward the target pressure becomes substantially uniform. The indoor air pressure in the chamber 11 can be set to the target atmospheric pressure while increasing the indoor air pressure substantially constant. When the opening degree of the swirl vane 31 is instantaneously set to the first opening degree, the indoor air pressure rapidly increases. However, in this system 10, the indoor air pressure gradually increases over a predetermined time, and therefore the indoor air pressure rapidly increases. Therefore, it is possible to reliably prevent adverse physical and mechanical effects on the chamber 11. In addition, the system 10 reliably maintains the indoor pressure in the chamber 11 by maintaining the opening of the swirl vane 31 at the first opening for a predetermined time after the opening of the swirl vane 31 reaches the first opening. The target atmospheric pressure can be set.

  The controller 15 responds to the change in the actually measured indoor pressure output from the pressure sensor 14 as indicated by the symbol L4 in FIGS. 2 and 3 after the second predetermined time has elapsed since the first opening degree maintaining means is executed. Feedback control is executed to cause the motor damper 29 to change the opening of the swirl vane 31 to an arbitrary opening so that the indoor pressure can be maintained at the target pressure (feedback first adjusting means). In the feedback control in the feedback first adjusting means, the actually measured indoor pressure measured by the pressure sensor 14 is output from the sensor 14 to the controller 15, and the controller 15 is stored in the main memory and the actually measured indoor pressure output from the pressure sensor 14. The target air pressure in the chamber 11 is compared. When the controller 15 determines that the measured indoor pressure is out of the target pressure range, the controller 15 generates an opening degree change amount of the swirl blade 31 for returning the measured indoor pressure to the target pressure. The opening change amount is output from the controller 15 to the control unit 30 of the motor damper 29. The control unit 30 of the damper 29 turns the swirl blade 31 by the motor according to the opening change amount output from the controller 15, changes the opening (turning angle) of the blade 31 by the change amount, and the air flow of the motor damper 29. The amount of air passing through the air flow path of the damper 29 is adjusted by widening or narrowing the path. As a result of executing the feedback control in time series, the controller 15 maintains the opening degree of the swirling blade 31 at that time via the control unit 30 of the damper 29 when the actually measured indoor pressure falls within the target pressure range.

  During the execution of the feedback first adjustment means, disturbances such as opening / closing of the door 22, activation of a local air supply device (not shown), activation of a local exhaust device (not shown), and the like cause fluctuation in the indoor pressure of the chamber 11. Or when the target air pressure in the chamber 11 is changed, the actually measured indoor air pressure measured by the pressure sensor 14 deviates from the range of the target air pressure, and between the target air pressure (reference input signal) in the chamber 11 and the feedback amount. An error occurs. If the controller 15 determines that the room air pressure in the chamber 11 has deviated from the target pressure range due to disturbance, the controller 15 corrects the room pressure to be within the target pressure range. Specifically, a new opening change amount of the opening degree of the swirl blade 31 is generated so that the error becomes zero between the target atmospheric pressure (reference input signal) and the feedback amount, and the opening change amount is Output to the control unit 30 of the motor damper 29. The control unit 30 of the damper 29 turns the swirl blade 31 by the motor in accordance with the opening change amount output from the controller 15 to change the opening (turning angle) of the blade by a new change amount. Adjust the amount of air passing through the flow path. When the actually measured indoor pressure falls within the range of the target atmospheric pressure, the controller 15 maintains the opening degree of the swirl blade 31 at that time via the control unit 30 of the damper 29. This indoor atmospheric pressure control system 10 performs feedback control to arbitrarily change the opening of the swirl vane 31 in accordance with the fluctuation of the indoor atmospheric pressure in the chamber 11 after the second predetermined time has elapsed since the first opening degree maintaining means is executed. Therefore, even if the room air pressure in the chamber 11 fluctuates up and down with the target air pressure sandwiched by disturbance, the room air pressure in the chamber 11 can be quickly restored to the target air pressure.

  4-7 is a figure which shows another example of correlation with the indoor air pressure of the chamber 11 with the elapsed time, and the opening degree of the rotation blade 31 of the motor damper 29. FIG. The vertical axes of these drawings represent the opening degree (%) of the swirl vane 31 of the motor damper 29, the chamber pressure (Pa) of the chamber 11, and the air supply air volume of the blower 24. Time (seconds or minutes) is shown. 4 to 7 show the correlation between the indoor air pressure and the opening degree of the swirl blade 31 during the startup of the system 10. 4 and 6 are diagrams continuing from FIG. 2, and FIGS. 5 and 7 are diagrams continuing from FIG. 4 to 7 show a case where FIGS. 4 and 6 show the case where the opening degree of the swirl vane 31 of the motor damper 29 is continuously set to the second opening degree, whereas FIGS. This is the point representing the case where the opening degree of the swirl blade 31 is gradually changed to the second opening degree.

  When the air supply amount (air amount) of the air supply fan 24 is changed (increased or decreased) while the system 10 is operating (while the air supply fan 24 and the exhaust air fan 28 are operating), the air supply fan 24 is changed. Outputs a supply air amount change signal including the changed supply air amount to the controller 15. When the controller 15 receives the supply air flow rate change signal from the supply air blower 24, when the feedback control is being performed, the supply air flow rate change of the supply air blower 24 is performed as indicated by reference numeral L5 in FIGS. The feedback control is continuously executed from when the signal is received until the predetermined second standby time elapses. The controller 15 stops the feedback control after the second standby time has elapsed.

  The controller 15 that has stopped the feedback control refers to the second correlation stored in the main storage device, and based on the second correlation, the motor damper for returning the room air pressure to the target air pressure again from the amount of change in the supply air volume The second opening of the 29 swirl vanes 31 is extracted, and the second opening is output to the control unit 30 of the damper 29. The controller 15 outputs to the control unit 30 of the motor damper 29 a third predetermined time from when the indoor air pressure of the chamber 11 returns to the target air pressure after the supply air volume of the air supply fan 24 is changed, and during the third predetermined time A second opening operation command for increasing or decreasing the opening of the swirl vane 31 continuously or stepwise toward the second opening is output to the control unit 30 of the damper 29 (opening second adjusting means). Further, after the third predetermined time has elapsed, the controller 15 outputs a fourth predetermined time, which is a time for maintaining the opening degree of the swirl blade 31 to the second opening degree, to the control unit 30 of the damper 29, and the opening degree is set. A second opening maintenance command for maintaining the second opening is output to the control unit 30 of the damper 29 (opening second maintaining means). Note that the controller 15 determines that the opening degree of the blade 31 has reached the second opening degree based on the opening degree of the swirl blade 31 output from the control unit 30 of the motor damper 29, and the fourth predetermined time and the 2 opening degree maintenance command can also be outputted to control part 30 of damper 29 (opening degree 2nd maintenance means).

  In accordance with the second opening operation command output from the controller 15, the control unit 30 of the motor damper 29 continuously or stepwisely turns the swirl vane 31 within a third predetermined time, as indicated by reference numeral L6 in FIGS. And the opening degree of the blade 31 is set to the second opening degree. Furthermore, the control unit 30 of the damper 29 follows the second opening degree maintenance command output from the controller 15 until the fourth predetermined time elapses as indicated by a symbol L7 in FIGS. The opening degree of 31 is maintained at the second opening degree. When the supply air volume (air volume) of the supply fan 24 increases, as shown in FIGS. 4 and 5, the opening degree of the swirl blade 31 of the damper 29 increases continuously or stepwise. The indoor pressure which has been increased gradually approaches the target pressure while gradually decreasing, and enters the range of the target pressure during the fourth predetermined time. When the supply air volume (air volume) of the supply fan 24 decreases, as shown in FIGS. 6 and 7, the opening degree of the swirl blade 31 of the damper 29 decreases continuously or stepwise, temporarily. The lowered indoor pressure gradually increases and approaches the target pressure, and enters the target pressure range during the fourth predetermined time.

  The indoor air pressure control system 10 is configured to change the supply air flow rate of the supply air blower 24 after the predetermined second standby time has elapsed since the reception of the change signal of the supply air flow rate of the supply air blower 24. Since the opening of the swirl vane 31 is gradually increased or decreased toward the second opening for returning to the target pressure from the change in the supply air flow, the feedback control is performed. Compared to the case of continuous execution, after changing the supply air volume of the supply air blower 24, the indoor air pressure of the chamber 11 does not increase or decrease significantly from the target air pressure, and an unnecessary increase or decrease in the room pressure is not caused. Even if the supply air volume of the supply air blower 24 is changed, the indoor air pressure can be quickly returned to the target room pressure. Since this system 10 does not greatly increase or decrease the target air pressure from the target air pressure during its operation, the airtightness of the chamber 11 is destroyed, air leaks from the chamber 11, etc. There is no adverse physical or mechanical effect.

  The indoor pressure control system 10 sets the opening degree of the swirl vane 31 to the second opening degree continuously or stepwise over a third predetermined time. It becomes uniform, and the indoor pressure in the chamber 11 can be returned to the target pressure while raising or lowering the indoor pressure almost constant. When the opening degree of the swirl vane 31 is instantaneously set to the second opening degree, the indoor atmospheric pressure rapidly increases or decreases. However, since the system 10 gradually increases or decreases over a predetermined time, the indoor atmospheric pressure rapidly increases. Thus, it is possible to reliably prevent the physical and mechanical adverse effects on the chamber 11 due to the rising or lowering. In addition, after the opening degree of the swirl blade 31 reaches the second opening degree, the system 10 maintains the opening degree of the blade 31 at the second opening degree for a predetermined time, thereby reliably ensuring the indoor pressure in the chamber 11. The target pressure can be set.

  The controller 15 responds to the change in the actually measured indoor pressure output from the pressure sensor 14 as indicated by reference numeral L8 in FIGS. 4 to 7 after the fourth predetermined time has elapsed since the execution of the second opening degree maintaining means. Thus, feedback control is executed to cause the motor damper 29 to change the opening of the swirl vane 31 to an arbitrary opening so that the indoor pressure can be maintained at the target pressure (feedback second adjusting means). Since the feedback control in the feedback second adjusting means is the same as that in the feedback first adjusting means, its description is omitted. This indoor air pressure control system 10 performs feedback control to arbitrarily change the opening of the swirl blade 31 in accordance with the change in the indoor air pressure of the chamber 11 after the fourth predetermined time has elapsed since the second opening degree maintaining means is executed. Therefore, even if the room air pressure in the chamber 11 fluctuates up and down with the target air pressure sandwiched by disturbance, the room air pressure in the chamber 11 can be quickly restored to the target air pressure. When the supply air volume (air volume) of the supply fan 24 is changed (increased or decreased) again during the execution of the feedback control of FIGS. 4 to 7, the controller 15 causes the second waiting time to elapse. Thereafter, the feedback control is stopped, and the opening degree second adjusting means, the opening degree second maintaining means, and the feedback second adjusting means are executed again in the same manner as in FIGS.

The schematic block diagram of the room pressure control system shown as an example. The figure which shows an example of the correlation with the indoor air pressure of the chamber | room accompanying elapsed time, and the opening degree of the rotation blade of a motor damper. The figure which shows an example of the correlation with the indoor air pressure of the chamber | room accompanying elapsed time, and the opening degree of the rotation blade of a motor damper. The figure which shows another example of the correlation with the indoor air pressure of the chamber | room accompanying elapsed time, and the opening degree of the rotation blade of a motor damper. The figure which shows another example of the correlation with the indoor air pressure of the chamber | room accompanying elapsed time, and the opening degree of the rotation blade of a motor damper. The figure which shows another example of the correlation with the indoor air pressure of the chamber | room accompanying elapsed time, and the opening degree of the rotation blade of a motor damper. The figure which shows another example of the correlation with the indoor air pressure of the chamber | room accompanying elapsed time, and the opening degree of the rotation blade of a motor damper.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Chamber pressure control system 11 Chamber 12 Air supply mechanism 13 Exhaust mechanism 14 Pressure sensor 15 Controller 24 Air supply blower (air supply apparatus)
25 Constant air volume unit (constant air volume adjusting device)
28 Exhaust fan (exhaust device)
29 Motor damper (damper device)
28 Control Unit 31 Swirling Blade 31 Exhaust Duct

Claims (6)

A constant air volume adjusting device that is connected to an air supply device that supplies air to a chamber of a predetermined volume and maintains a constant amount of air supplied to the chamber; and an air flow path that is opened and closed by swirling of the swirling blades. In an indoor air pressure control system comprising a damper device capable of adjusting the amount of air discharged from the chamber, and a controller for adjusting the opening degree of the swirl blades of the damper device to maintain the indoor air pressure of the chamber at a target air pressure,
The controller includes an opening operation start means for starting the opening operation of the swirl blade after a predetermined waiting time has elapsed from the time when the activation signal of the air supply device is received, and until the indoor pressure in the chamber reaches the target pressure. And an opening first adjusting means for gradually increasing the opening of the swirl vane toward the first opening corresponding to the target air pressure of the chamber.   An opening first maintaining means for maintaining the opening of the swirl vane at the first opening for a predetermined time after the opening of the swirl vane reaches the first opening; 1 After the execution of the maintaining means, after the elapse of a predetermined time, the opening degree of the swirl blade is adjusted in accordance with the fluctuation of the indoor air pressure of the chamber so that the indoor air pressure of the chamber can be maintained at the target air pressure against disturbance. The indoor atmospheric pressure control system according to claim 1, further comprising feedback first adjusting means that is arbitrarily changed.   3. The indoor air pressure control system according to claim 1, wherein the opening degree first adjusting means sets the opening degree of the swirl blade to the first opening degree continuously or stepwise over a predetermined time.   The controller is after a predetermined waiting time has elapsed since the supply air volume change signal of the air supply apparatus was received, and until the indoor air pressure in the chamber returns to the target air pressure from the change in the air supply air volume of the air supply apparatus The opening degree second adjustment means for gradually increasing or decreasing the opening degree of the swirl vane toward the second opening degree for returning to the target atmospheric pressure from the change in the supply air volume. Item 4. The atmospheric pressure control system according to any one of Items 3 to 4.   An opening second maintaining means for maintaining the opening of the swirl vane at the second opening for a predetermined time after the opening of the swirl vane reaches the second opening; (2) After a predetermined time has elapsed since the execution of the maintaining means, the opening degree of the swirl vane is adjusted in accordance with the fluctuation of the indoor pressure of the chamber so that the indoor pressure of the chamber can be maintained at the target pressure against disturbance. The indoor atmospheric pressure control system according to claim 4, further comprising feedback second adjusting means that is arbitrarily changed.   6. The indoor air pressure control system according to claim 4, wherein the opening degree second adjusting means sets the opening degree of the swirl blade to the second opening degree continuously or stepwise over a predetermined time.

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