JP5033106B2 - Room pressure control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a room pressure control system capable of forming a passing air current to one direction in a communication port between rooms when a door of the communication port between the rooms in a target room for controlling room pressure is opened and of maintaining a predetermined relationship of a pressure level between the target room and an outside region. <P>SOLUTION: When the door 12a of the communication port 12 between the rooms is closed, a control means 10 performs closing door mode control for executing room pressure adjustment control by adjustment of openings of room pressure adjustment dampers Va, Vb with respect to each target room 1a, 1b while set normal room pressure ppa, ppb for each target room 1a, 1b is set to be target room pressure pma, pmb of each target room 1a, 1b. When the door 12a is opened, the control means 10 performs opening door mode control for fixing the opening of the room pressure adjustment damper Va with respect to either one target room 1a and executing room pressure adjustment control with respect to the other target room 1b with the target room pressure pmb of the other target room 1b changed to set room pressure pmb for forming an air current. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a room pressure control system, and more specifically, a supply air passage and an exhaust air passage are connected to a high pressure side target chamber and a low pressure side target chamber, respectively. A chamber pressure adjusting damper for each target chamber is interposed in each of the air passages on either side of the target chamber, and the opening of the chamber pressure adjusting damper is adjusted according to the detected chamber pressure of the target chamber by the chamber pressure sensor. The present invention relates to a chamber pressure control system provided with a control means for executing chamber pressure adjustment control for adjusting each chamber to a target chamber pressure.

  Conventionally, in this type of room pressure control system, the following systems (a) and (b) are considered in consideration of the opening and closing of the door at the communication port between the high pressure side target chamber and the low pressure side target chamber. Has been proposed (see FIG. 1).

(A) When the door 12a is in the closed state, the set normal chamber pressure ppa for the high pressure side target chamber is set to the target chamber pressure pma of the high pressure side target chamber 1a, and the setting for the low pressure side target chamber is lower than that. With the normal chamber pressure ppb set to the target chamber pressure pmb of the low-pressure side target chamber 1b, the above-described chamber pressure adjustment control is executed for each of the target chambers 1a and 1b by adjusting the opening of the chamber pressure adjusting dampers Va and Vb.
On the other hand, when the door 12a is in the open state, each target chamber 1a is set with the target chamber pressure pma of the high-pressure side target chamber 1a and the target chamber pressure pmb of the low-pressure side target chamber 1b being equal to each other. , 1b, the above-described chamber pressure adjustment control by adjusting the opening of the chamber pressure adjustment dampers Va, Vb is continuously executed from when the door 12a is in the closed state (see Patent Document 1).

(B) When the door 12a is in the closed state, the setting normal chamber pressure ppa for the high-pressure side target chamber is set to the target chamber pressure pma of the high-pressure side target chamber 1a, and the setting for the low-pressure side target chamber is lower than that. With the normal chamber pressure ppb set to the target chamber pressure pmb of the low-pressure side target chamber 1b, the above-described chamber pressure adjustment control is executed for each of the target chambers 1a and 1b by adjusting the opening of the chamber pressure adjusting dampers Va and Vb.
On the other hand, when the door 12a is in the open state, the chamber pressure adjustment dampers Va and Vb for the target chambers 1a and 1b are used as the air volume adjustment dampers in a state where the chamber pressure adjustment control for the target chambers 1a and 1b is suspended. The air volume adjustment by adjusting the opening degree of the chamber pressure adjusting dampers Va and Vb and the automatic air volume adjusting function of the constant air volume damper devices 5a and 5b provided for the respective target chambers 1a and 1b are related to the opening degree of the door 12a. First, the passing airflow Ka at the inter-chamber communication port 12 is maintained as a one-way airflow at a constant wind speed from the high-pressure side target chamber 1a toward the low-pressure side target chamber 1b (see Patent Document 2).

JP-A-10-83221 JP 2006-292280 A

  However, in the conventional system of (a) above, even when the door 12a is in the open state, the chamber pressure adjustment control for the target chambers 1a and 1b is continued and the chamber pressures pa and pb of both the target chambers 1a and 1b are set to each other. Since the target chamber pressure is adjusted to be equal, the relationship between the pressure levels between the target chambers 1a and 1b and the external area (adjacent corridor, separate room, etc.) is for safety such as prevention of contamination regardless of whether the door 12a is opened or closed. Although the required relationship can be maintained, the chamber pressures pa and pb of the two target chambers 1a and 1b are adjusted to the same chamber pressure as described above, and this occurs in the inter-chamber communication port 12 in the open state. There was a problem that it was difficult to control the direction of the passing air flow Ka.

  On the contrary, in the conventional system of (b) above, although the direction of the passing air flow Ka generated at the intercommunicating port 12a can be maintained in the required one direction when the door 12a is in the open state, the door 12a is opened. When in the door state, the air pressure adjustment control using the air pressure adjustment dampers Va and Vb as the air flow adjustment damper is brought into a state in which the chamber pressures pa and pb of the target chambers 1a and 1b are not adjusted. , 1b and the external pressure range, there is a problem that the high and low pressure relationship cannot be reliably maintained in the relationship required for safety such as pollution prevention.

  In view of this situation, the main problem of the present invention is to take a rational control form, and to prevent contamination of the level of pressure between the two target chambers and the external area when the door is in the open state. It is in the point which can be reliably hold | maintained in the relationship requested | required on safety | security, such as, and can also reliably form the one-way passing airflow in the inter-chamber communication opening of an open door state.

A first characteristic configuration of the present invention relates to a room pressure control system,
A supply air passage and an exhaust air passage are connected to each of the high pressure side target chamber and the low pressure side target chamber, and each of the air supply passage and the exhaust air passage is connected to each of the air passages on either side. Install a chamber pressure adjustment damper for the target room,
Control means for executing, for each target chamber, chamber pressure adjustment control for adjusting the chamber pressure of the target chamber to the target chamber pressure by adjusting the opening of the chamber pressure adjusting damper according to the detected chamber pressure of the target chamber by the chamber pressure sensor. A room pressure control system provided,
An open / close detection means for detecting opening / closing of the door at the communication port between the high pressure side target chamber and the low pressure side target chamber is provided,
The control means is based on the detection information of the opening / closing detection means.
When the door is in a closed state, the set normal chamber pressure for the high pressure side target chamber is set to the target chamber pressure of the high pressure side target chamber, and the set normal chamber pressure for the low pressure side target chamber lower than that is set to the low pressure side target. In the state of the target chamber pressure of the chamber, the door closing mode control for performing the chamber pressure adjustment control for each of the high pressure side target chamber and the low pressure side target chamber is performed,
And when the door is in an open state, the opening of the chamber pressure adjusting damper with respect to either one of the high pressure side target chamber and the low pressure side target chamber is fixed, and the other target chamber Opening mode control for executing the chamber pressure adjustment control for the other target chamber in a state in which the target chamber pressure is changed to the setting chamber pressure for airflow formation in which the one-way passing airflow is formed at the communication port between the chambers. It is in the point which is made into the structure to implement.

  That is, according to this configuration, when the door of the inter-chamber communication port is in the closed state, the high-pressure-side target chamber is controlled by the chamber pressure adjustment control for the high-pressure-side target chamber by performing the door-closing mode control. Is adjusted to the set normal chamber pressure for the low pressure side target chamber by the chamber pressure adjustment control for the low pressure side target chamber.

  Therefore, when the door is closed, it goes without saying that contamination between the high-pressure side target chamber and the low-pressure side target chamber can be reliably prevented, and the pressure level between both target chambers and the external area can be reliably prevented. The relationship can be reliably maintained in the relationship required for safety such as prevention of contamination (this is also the case with the conventional systems (a) and (b) described above).

  On the other hand, in this type of room pressure control system, when the door of the chamber communication port is opened, the room pressure of each target room is communicated between the target rooms through the chamber communication port regardless of the chamber pressure adjustment control for each target room. Is equal to the chamber pressure (or substantially equal chamber pressure), but here, in a state where the opening of the chamber pressure adjustment damper with respect to either one of the high pressure side target chamber and the low pressure side target chamber is fixed, When the opening of the chamber pressure adjustment damper with respect to the other target room is changed to an appropriate opening, the one-way passage in the desired direction is made at the inter-chamber communication opening in the open state due to the difference in the passing air volume of each of the chamber pressure adjustment dampers. An air flow can be formed.

  At this time, the target chamber pressure of the other target chamber is changed from the set normal chamber pressure when the door is closed in order to change the opening of the chamber pressure adjusting damper with respect to the other target chamber to an appropriate opening. Then, by adjusting the opening of the chamber pressure adjustment damper on the chamber pressure adjustment control in response to the change of the target chamber pressure, the opening of the chamber pressure adjusting damper with respect to the other target chamber is changed to the appropriate opening as described above. Then, the chamber pressure adjustment control for the other target chamber in a state in which the target chamber pressure is changed enables the chamber pressures of both the target chambers in the communication state to be adjusted to the target chamber pressure after the change for the other target chamber. .

  Therefore, the chamber pressure adjustment control for the other target chamber was performed with the opening of the chamber pressure adjustment damper for the one target chamber fixed as the chamber pressure of the other target chamber adopted when the door was in the open state. In this case, a one-way air flow in a desired direction can be formed at the communication port between the rooms in the open state, and the pressure level between the target chambers and the external region can be maintained in a desired relationship. If the set room pressure for airflow formation is selected, when the door is in the open state, the door opening mode control is performed to form a one-way airflow in the desired direction at the communication port between the rooms in the open state. The chamber pressures of both target chambers in the communication state can be adjusted to a chamber pressure that can maintain a desired pressure level relationship with the external region.

  That is, in the conventional system of (a) described above, when the door is in the open state, the chamber pressure is adjusted for each of the high-pressure side target chamber and the low-pressure side target chamber with the target chamber pressures of both target chambers being equal to each other. Since the control is executed, it is difficult to control the direction of the passing airflow generated at the communication port between the rooms in the open state. However, according to the above configuration, when the door is in the open state, the communication between the rooms in the open state is performed. Desirable safety requirements such as prevention of contamination with high and low pressure relations between the two target chambers in communication and the external area while reliably forming and maintaining a one-way airflow in the desired direction at the mouth In this respect, the room pressure control system is more excellent than the conventional systems such as (a) and (b) described above.

  In the implementation of the above configuration, the opening degree of the chamber pressure adjustment damper with respect to one of the high-pressure side target chamber and the low-pressure side target chamber is controlled by the opening mode control performed when the door is in the open state. To fix, the fixed opening is either the opening at the time of switching from the door closing mode control to the door opening mode control (that is, the opening when the door is opened) or the opening set appropriately. Good.

  For the door opening mode control, the opening of the chamber pressure adjustment damper with respect to the high pressure side target chamber is fixed and the target chamber pressure of the low pressure side target chamber is changed to the set chamber pressure for airflow formation. Contrary to this, the control mode for executing the chamber pressure adjustment control for the chamber, and conversely, the opening of the chamber pressure adjusting damper with respect to the low-pressure side target chamber is fixed and the target chamber pressure of the high-pressure side target chamber is set to the set chamber pressure for airflow formation. If the control mode for executing the chamber pressure adjustment control on the high-pressure side target chamber can be appropriately switched in accordance with the switching command, etc. in the state changed to, the chamber is further improved in terms of functionality and versatility. It can be a pressure control system.

  The chamber pressure adjusting damper for each target chamber may adopt either a configuration intervening on the side of the supply air passage or a configuration interposed on the side of the exhaust air passage. Also, the supply air passage and the exhaust air passage And a constant air volume damper device having an automatic air volume adjustment function that adjusts the passing air volume to the set air volume by adjusting the damper opening degree on the air path on the side different from the intervening side of the room pressure adjusting damper, The room pressure adjustment function may be enhanced.

The second feature configuration of the present invention specifies an embodiment suitable for the implementation of the first feature configuration.
In the state where the high pressure side target chamber is the one target chamber and the low pressure side target chamber is the other target chamber, the control means is configured as the opening mode control when the door is in an open state. While adjusting the opening of the chamber pressure adjusting damper with respect to the high pressure side target chamber and changing the target chamber pressure of the low pressure side target chamber to the set chamber pressure for airflow formation, the chamber pressure adjustment is performed for the low pressure side target chamber. The configuration is such that the control is executed.

  In other words, when returning from the door opening mode control to the door closing mode control when the door is closed, the chamber pressure adjustment damper for the one target chamber that has been fixed in the opening mode control is set to the one target chamber. Along with the resumption of the chamber pressure adjustment control, the opening degree for adjusting the room pressure of the one target room to the set normal room pressure for the one target room from the fixed opening degree in the door opening mode control (in short, the original room The opening changes to (pressure adjustment opening).

  For the chamber pressure adjustment damper for the other target chamber whose target chamber pressure has been changed to the setting chamber pressure for airflow formation by the door opening mode control, the target chamber pressure of the other target chamber is set to the normal setting for the other target chamber. As the pressure returns to the room pressure, the opening for adjusting the chamber pressure of the other target chamber to the set normal chamber pressure for the other target chamber is adjusted from the opening degree for adjusting the chamber pressure of the other target chamber to the set chamber pressure for airflow formation. The degree of opening changes to a degree (in short, the original room pressure adjustment opening).

  Then, when comparing the opening changes when returning from the door opening mode control to the door closing mode control, the opening is adjusted from the opening for adjusting the chamber pressure to the set chamber pressure for airflow formation to the original opening for adjusting the chamber pressure. The room pressure adjustment damper for the one target room whose opening degree changes from the fixed opening degree during the door opening mode control to the original room pressure adjustment opening degree rather than the opening degree change of the room pressure adjustment damper for the other target room that changes degree In general, the change in the degree of opening is that in which the change width of the degree of change in opening is made constant.

  In particular, in the opening mode control, the opening of the chamber pressure adjustment damper for one target chamber is set to the opening at the time of switching from the previous closing mode control to the opening mode control (in short, the original chamber pressure adjustment opening). In the case of fixing to the set room pressure for airflow formation, the opening degree is changed from the opening degree for adjusting the chamber pressure to the original room pressure adjustment opening degree. , The opening change from the fixed opening to the original chamber pressure adjustment opening (that is, the opening change only in the vicinity of the original chamber pressure adjustment opening) In general, the change in the opening degree is such that the change width of the opening change each time is small.

  Therefore, according to the above configuration in which the opening of the chamber pressure adjusting damper with respect to the high pressure side target chamber is fixed by the opening mode control with the high pressure side target chamber as the one target chamber, the door is closed from the opening mode control accompanying the door closing. Returning to mode control restores the room pressure of each target room from the set room pressure for airflow generation to the set normal room pressure of each target room, making the high-pressure side target room more stable than the low-pressure side target room Thus, the chamber pressure can be returned smoothly in a state in which the pressure is reduced, and this makes the chamber pressure control system particularly suitable when the pressure adjustment of the high pressure side target chamber is more important than the low pressure side target chamber. .

The third feature configuration of the present invention specifies an embodiment suitable for the implementation of the first feature configuration.
In the state where the low pressure side target chamber is the one target chamber and the high pressure side target chamber is the other target chamber, the control means is configured as the opening mode control when the door is in the open state. While adjusting the opening of the chamber pressure adjusting damper with respect to the low pressure side target chamber and changing the target chamber pressure of the high pressure side target chamber to the set chamber pressure for airflow formation, the chamber pressure adjustment is performed for the high pressure side target chamber. The configuration is such that the control is executed.

  In other words, as described above, the return from the door opening mode control to the door closing mode control accompanying the closing of the door causes the chamber pressure in each target chamber to return from the set chamber pressure for airflow formation to the set normal chamber pressure in each target chamber. Furthermore, in the door opening mode control, it is possible to smoothly return the room pressure in a state where the one target chamber that fixes the opening of the chamber pressure adjusting damper is more stable than the other target chamber.

  Therefore, according to the above configuration in which the opening of the chamber pressure adjusting damper with respect to the low pressure side target chamber is fixed by the opening mode control with the low pressure side target chamber as the one target chamber, the door is closed from the opening mode control accompanying the door closing. Returning to mode control restores the room pressure of each target room from the set room pressure for airflow formation to the set normal room pressure of each target room, making the low-pressure side target room more stable than the high-pressure side target room In this state, the chamber pressure can be returned smoothly, which makes the chamber pressure control system particularly suitable when the pressure adjustment of the low-pressure side target chamber is more important than the high-pressure side target chamber. .

The fourth characteristic configuration of the present invention specifies an embodiment suitable for the implementation of any of the first to third characteristic configurations,
The low pressure side target chamber is in communication with or adjacent to the first separate chamber having a predetermined chamber pressure separately from the high pressure side target chamber.
The set chamber pressure for airflow formation is a chamber pressure within a range between a predetermined chamber pressure of the first separate chamber and a set normal chamber pressure for the low-pressure target chamber.

  That is, according to this configuration, when both the target chambers are adjusted to the set chamber pressure for airflow formation by performing the door opening mode control when the door is in the open state, the chamber pressures of both the target chambers are the first. It is adjusted to a chamber pressure between a predetermined chamber pressure of the separate chamber and a set normal chamber pressure for the low-pressure side target chamber.

  Therefore, when the door is in the closed state even when the door is in the open state, the pressure relationship between the first separate chamber and the low pressure side target chamber in communication with or adjacent to the low pressure side target chamber is The same relationship can be maintained, whereby contamination between the low-pressure side target chamber and the first separate chamber can be more reliably prevented.

The fifth feature configuration of the present invention specifies an embodiment suitable for the implementation of the first to fourth feature configurations.
The high pressure side target chamber is in communication with or adjacent to the second separate chamber having a predetermined chamber pressure, separately from the low pressure side target chamber.
The set chamber pressure for forming the airflow is that the chamber pressure is in a range between a predetermined chamber pressure of the second separate chamber and a set normal chamber pressure for the high-pressure side target chamber.

  That is, according to this configuration, when both the target chambers are adjusted to the set chamber pressure for airflow formation by performing the door opening mode control when the door is in the open state, the chamber pressures of both the target chambers are the second. It is adjusted to a chamber pressure between a predetermined chamber pressure in the separate chamber and a set normal chamber pressure for the high-pressure side target chamber.

  Therefore, when the door is in the closed state even when the door is in the open state, the pressure relationship between the second separate chamber and the high pressure side target chamber in communication with or adjacent to the high pressure side target chamber is The same relationship can be maintained, whereby contamination between the high-pressure side target chamber and the second separate chamber can be more reliably prevented.

  As a parallel implementation of the fourth characteristic configuration and the fifth characteristic configuration, the low pressure side target chamber is in communication with or adjacent to the first separate chamber having a predetermined chamber pressure separately from the high pressure side target chamber, The side target chamber is in communication with or adjacent to a second separate chamber having a predetermined chamber pressure separately from the low pressure side target chamber, whereas the predetermined chamber pressure of the first separate chamber has the set chamber pressure for airflow formation. The room pressure is within a range between the set normal chamber pressure for the low pressure side target chamber and within the range between the predetermined chamber pressure of the second separate chamber and the set normal chamber pressure for the high pressure side target chamber. For example, the doors open for both the low-pressure side target chamber and the first and second chambers communicating or adjacent to the low-pressure side target chamber and the high-pressure side target chamber and the second separate chamber communicating or adjacent to the high-pressure side target chamber. When the door is in the door state, the same relationship as when the door is in the closed state can be maintained. It can be an excellent room pressure controlling system to more functionality and versatility.

The sixth characteristic configuration of the present invention specifies an embodiment suitable for the implementation of any of the first to fifth characteristic configurations,
An automatic air volume adjustment function for adjusting the passing air volume to the set air volume by adjusting the damper opening is provided in the air path on the side different from the intervening side of the chamber pressure adjusting damper in the supply air path and the exhaust air path. It is equipped with a constant air volume damper device,
The control means is configured to cause the constant air volume damper device to perform an automatic air volume adjustment function when the door is in a closed state, and to fix a damper opening of the constant air amount damper device when the door is in an open state. It is in a certain point.

  In other words, the door is closed by installing the constant air volume damper device with the automatic air volume adjustment function as described above in the air path on the side different from the installation side of the room pressure adjustment damper in the supply air path and the exhaust air path. If the constant air volume damper device is configured to perform the automatic air volume adjustment function when the door closing mode control is performed, the room pressure of the target room can be more accurately and stably controlled in the room pressure adjustment control in the door closing mode control. Can be adjusted to set normal room pressure.

  Further, when the door is in the open state, there is no particular problem in the implementation of the first feature configuration even if the automatic air volume adjustment function of the constant air volume damper device is maintained with respect to the execution of the door opening mode control. When the door is in the open state as shown in the figure, if the damper opening of the constant air volume damper device is fixed for the execution of the door opening mode control, the passing air volume of the chamber pressure adjusting damper with respect to one target chamber and the other The one-way passing airflow at the inter-chamber communication port formed by the difference from the passing airflow of the chamber pressure adjusting damper with respect to the target chamber can be more stably and reliably formed on the airflow surface.

  In the implementation of this configuration, when the door is in the open state, the damper opening degree of the constant air volume damper device is fixed, but the fixed opening degree is the opening degree when the door is opened (that is, the door closing mode control). Opening degree at the time of switching from door to door opening mode control) or an opening degree set as appropriate.

  Further, in the implementation of the above configuration, a constant air volume damper device is interposed in each of the air passages on the side different from the intervening side of the room pressure adjusting damper in the supply air passage and the exhaust air passage, For both the constant air volume damper device for the target room and the constant air volume damper device for the low pressure side target chamber, the automatic air volume adjustment function is performed when the door is in the closed state, and the damper opening is fixed when the door is in the open state. It is desirable to do so.

  In some cases, only one of the constant air volume damper device for the high pressure side target chamber and the constant air volume damper device for the low pressure side target chamber is opened when the door is open. The fixed air volume damper device is provided only for one of the high pressure side target chamber and the low pressure side target chamber, and the single constant air volume damper device is used. The automatic air volume adjustment function may be performed when the door is in the closed state, and the damper opening degree may be fixed when the door is in the open state.

The seventh feature configuration of the present invention specifies a preferred embodiment in the implementation of the first to sixth feature configurations.
The control means measures the opening degree of the chamber pressure adjusting damper with respect to the other target chamber when the door closing mode control is performed, and stores the measured opening degree as a determination opening degree.
Thereafter, when returning from the opening mode control to the closing mode control accompanying the closing of the door, the target chamber pressure of the other target chamber is adopted in the closing mode control from the set chamber pressure for airflow formation. When the opening of the chamber pressure adjusting damper with respect to the other target chamber returns to the opening for determination or in the vicinity thereof by the chamber pressure adjustment control after returning to the set normal chamber pressure for the other target chamber The chamber pressure adjustment damper for the target chamber is released from the fixed opening state and the chamber pressure adjustment control for the one target chamber is resumed.

  That is, in this configuration, when the door closing mode control is performed, the opening degree of the chamber pressure adjustment damper with respect to the other target chamber that has been adjusted by the chamber pressure adjustment control for the other target chamber (that is, the chamber pressure of the other target chamber is set to the other target chamber). (The opening degree adjusted to the set normal room pressure) is set as the opening degree for determination.

  After returning from the door opening mode control accompanying the door closing to the door closing mode control, after returning the target chamber pressure of the other target chamber from the set chamber pressure for airflow formation to the set normal chamber pressure for the other target chamber The opening of the chamber pressure adjusting damper with respect to the other target chamber is the above-described determination opening (that is, the original opening for adjusting the chamber pressure of the other target chamber to the set normal chamber pressure) or in the vicinity thereof. After the return, the chamber pressure adjustment damper for one target chamber is released from the fixed opening state, and the chamber pressure adjustment control for one target chamber is resumed.

  That is, after this, the chamber pressure of the other target chamber is almost restored to the set normal chamber pressure for the other target chamber, and then the chamber pressure adjustment damper for one target chamber is released from the fixed opening state and the one target chamber is released. The chamber pressure adjustment control for the chamber can be resumed. For example, when returning from the opening mode control to the closing mode control, the target chamber pressure of the other target chamber is set to the set normal chamber pressure for the other target chamber. At the same time, the chamber pressure adjustment damper for one target chamber is released from the fixed opening state, and the chamber pressure adjustment control for one target chamber is resumed. At the time of return, both the chamber pressure adjustment damper for the high-pressure side target chamber and the chamber pressure adjustment damper for the low-pressure side target chamber are in a state of performing a reversible opening degree change at the same time. Transient indefinite chamber pressure change It is possible to more reliably and effectively prevent such leads to room pressure reversal of the high pressure side target chamber and the low pressure side target chamber case temporarily by.

  In implementing this configuration, during the period of execution of the closing mode control, the degree of opening of the chamber pressure adjustment damper with respect to the other-side target chamber is measured continuously or periodically, and the most recent predetermined unit time with the passage of time. It is desirable that the average value of the measured opening is sequentially updated as the determination opening.

  In some cases, the opening of the chamber pressure adjustment damper with respect to the other-side target chamber is continuously or periodically measured during the closing mode control period, and the average value of the measured opening degrees during the entire closing mode control period. Alternatively, the latest measured opening may be set as the opening for determination.

The eighth feature configuration of the present invention specifies an embodiment suitable for the implementation of the first to sixth feature configurations.
When the control means returns from the opening mode control to the closing mode control accompanying the closing of the door, the control unit changes the target chamber pressure of the other target chamber from the set chamber pressure for airflow formation to the closing mode. After returning to the set normal chamber pressure for the other target chamber adopted in the control, when the set return time has elapsed, the chamber pressure adjusting damper for the one target chamber is released from the fixed opening state and the one target chamber is released. The configuration is such that the room pressure adjustment control is resumed.

  That is, in this configuration, when returning from the door opening mode control to the door closing mode control accompanying the closing of the door, the target chamber pressure of the other target chamber is changed from the set chamber pressure for airflow formation to the set normal chamber pressure for the other target chamber. As described above, the opening degree of the chamber pressure adjusting damper with respect to the other target chamber is equal to or close to the determination opening degree (that is, the original opening degree for adjusting the chamber pressure of the other target room to the set normal room pressure). Instead of waiting for the return, the target chamber pressure of the other target chamber is returned from the set chamber pressure for airflow formation to the set normal chamber pressure for the other target chamber, and then waiting for the set return time to elapse. After the set return time has elapsed, the chamber pressure adjustment damper for one target chamber is released from the fixed opening state, and the chamber pressure adjustment control for one target chamber is resumed.

  Therefore, if an appropriate time is selected as the set return time, as described above, the chamber pressure in the one target chamber is restored after the chamber pressure in the other target chamber is almost returned to the set normal chamber pressure for the other target chamber. The adjustment damper can be released from the fixed opening state and the chamber pressure adjustment control for one of the target chambers can be resumed, temporarily or temporarily due to the simultaneous transient indeterminate chamber pressure change of each target chamber. And reversing the chamber pressure between the low pressure side target chamber and the target chamber can be prevented more reliably and effectively.

  In the implementation of this configuration, the set return time may be automatically corrected to the optimum value based on the change in the chamber pressure of the other target chamber when returning from the door opening mode control to the door closing mode control.

  FIG. 1 shows a system configuration of a room pressure control system, wherein 1a to 1c are first to third target rooms for adjusting the room pressure, and Fs is for air conditioning to each of the target rooms 1a to 1c via the main supply air passage 2. An air supply fan that supplies air SA, Fe is an exhaust fan that exhausts the room air RA from each of the target chambers 1 a to 1 c via the main exhaust air passage 3.

  The branch supply air passages 4 connected to the target chambers 1a to 1c from the main supply air passage 2 are respectively provided with constant air amount damper devices 5a to 5c and an air supply filter 6, and the constant air amount damper device 5a. ˜5c has an automatic air volume adjustment function that adjusts the passing air volume (here, the supply air volume to each of the target chambers 1a to 1c) to the set air volume by adjusting the damper opening.

  Further, the branch exhaust air passage 7 connected from the main exhaust air passage 3 to each of the target chambers 1a to 1c is provided with an exhaust filter 8 and room pressure adjusting dampers Va to Vc, respectively. The dampers Va to Vc are operated by the damper controllers 9a to 9c in response to a command from the system controller 10.

  Each of the target chambers 1a to 1c is equipped with a chamber pressure sensor 11 that detects the chamber pressures pa to pc of the target chambers 1a to 1c (specifically, a differential pressure from the external area), and the first target chamber Open / close detection for detecting the opening / closing of the door 12a at the communication port 12 between the chambers 12a and the second target chamber 1b. A door sensor 14 is provided as a means.

  In addition, although there is a small opening 13 for article delivery or the like on the chamber wall between the second target chamber 1b and the third target chamber 1c, the small opening 13 is connected to the first target chamber 1a and the second target chamber 1b. The opening area is small compared to the inter-chamber communication port 12 between them, and the second target chamber 1b and the third target chamber 1c can be held in different chamber pressure states.

  The system controller 10 serving as a control means for controlling the system is configured to apply the chamber pressures pa to pc of the target chambers 1a to 1c when the door 12a is in a closed state based on the opening / closing detection of the door 12a by the door sensor 14. “Door mode control” is performed to adjust the set normal chamber pressures ppa, ppb, and ppc set for the chambers 1a to 1c. On the other hand, when the door 12a is in the open state, the door is opened instead of the door mode control. The one-way passing air flow Ka from the first target chamber 1a toward the second target chamber 1b is formed at the inter-chamber communication port 12 in the state and the chamber pressures pa and pb of the first and second target chambers 1a and 1b are required. The “door opening mode control” is performed to maintain the chamber pressure ppk.

  The set normal chamber pressure ppa of the first target chamber 1a is higher than the set normal chamber pressure ppb of the second target chamber 1b, and the first target chamber 1a and the second target chamber 1b are the high pressure side target chamber and the low pressure side target chamber. The set normal chamber pressure ppc of the third target chamber 1c is, for example, the chamber pressure between the set normal chamber pressure ppa of the first target chamber 1a and the set normal chamber pressure ppb of the second target chamber 1b. (Ppa> ppc> ppb).

  In the above configuration, the system controller 10 is specifically configured to execute the following control operations (A) to (D) as the above-described closing mode control when the door 12a is in the closed state ( (See FIGS. 2 and 3).

  (A) As the target chamber pressures pma to pmc of the target chambers 1a to 1c, the set normal chamber pressures ppa, ppb and ppc of the target chambers 1a to 1c are designated to the damper controllers 9a to 9c of the target chambers 1a to 1c. To do. In other words, as the target chamber pressures pma to pmc of the target chambers 1a to 1c, the set normal chamber pressure ppa for the high pressure side target chamber, the set normal chamber pressure ppb for the low pressure side target chamber, and the settings for the intermediate pressure target chamber The normal chamber pressure ppc is assigned to each damper controller 9a to 9c.

  (B) The opening of the chamber pressure adjusting dampers Va to Vc is adjusted according to the deviation between the detected chamber pressures pa to pc and the target chamber pressures pma to pmc by the chamber pressure sensor 11, and the chamber pressure pa to the target chambers 1a to 1c is adjusted. The damper controllers 9a to 9c of the target chambers 1a to 1c are caused to perform chamber pressure adjustment control for adjusting pc to the target chamber pressures pma to pmc (here, set normal chamber pressures ppa, ppb, and ppc).

  (C) The constant air volume damper devices 5a to 5c for the target rooms 1a to 1c are caused to have an automatic air volume adjustment function.

  (D) The opening β of the chamber pressure adjusting damper Vb with respect to the second target chamber 1b is periodically measured, and the average value βav of the latest measured opening β per unit time with the passage of time is used as the determination opening. It is updated sequentially and the updated determination opening βav is stored.

  That is, in this door closing mode control, the system controller 10 sets the set normal chamber pressures ppa, ppb, and ppc of the target chambers 1a to 1c to the target chamber pressures pma to pmc of the target chambers 1a to 1c, While the constant air volume damper devices 5a to 5c for the target chambers 1a to 1c are caused to perform the automatic air volume adjustment function, the above-described chamber pressure adjustment control is executed for each of the target chambers 1a to 1c, thereby the chambers of the target chambers 1a to 1c. The pressures pa to pc are adjusted to the set normal chamber pressures ppa, ppb, and ppc (ppa> ppc> ppb), and the relationship between the chamber pressure levels between the target chambers 1a to 1c, and the target chambers. The high and low pressure relationship between 1a to 1c and the external region is maintained in the required appropriate relationship.

  On the other hand, the system controller 10 is configured to execute the following control operations (E) to (H) as the above-described door opening mode control when the door 12a is in the door open state (see FIG. 2 and FIG. 4).

  (E) The opening degree of the chamber pressure adjusting damper Va with respect to the first target chamber 1a which is the high pressure side target chamber is fixed by a command to the damper controller 9a of the first target chamber 1a.

  (F) The damper opening degree of the constant air volume damper device 5a with respect to the first target chamber 1a that is the high pressure side target chamber and the damper opening degree of the constant air amount damper device 5b with respect to the second target chamber 1b that is the low pressure side target chamber are fixed. To do.

  (G) The target chamber pressure pmb of the second target chamber 1b, which is the low pressure side target chamber, is changed from the set normal chamber pressure ppb of the second target chamber 1b to the set chamber pressure ppk for airflow formation.

  Here, the set chamber pressure ppk for airflow formation is opened when the chamber pressure adjustment control for the second target chamber 1b is executed in a state where the opening degree of the chamber pressure adjustment damper Va for the first target chamber 1a is fixed. A one-way passing air flow Ka with an appropriate wind speed from the first target chamber 1a, which is the high pressure side target chamber, to the second target chamber 1b, which is the low pressure side target chamber, can be formed at the inter-room communication port 12 in the door state. The chamber pressure is selected so that the pressure relationship between the first and second target chambers 1a, 1b and the external region can be maintained in a desired relationship.

  The set chamber pressure ppk for airflow formation is selected from the range between the set normal chamber pressure ppp of the second target chamber 1b which is the low pressure side target chamber and the set normal chamber pressure ppc of the third target chamber 1c. (Ppb <ppk <ppc).

  It is desirable that the set chamber pressure ppk for airflow formation is determined to be an optimum value through verification such as a system trial operation that is performed in advance.

  (H) For the second target chamber 1b which is the low pressure side target chamber, the second target chamber 1b is adjusted by adjusting the opening of the chamber pressure adjusting damper Vb according to the deviation between the detection chamber pressure pb detected by the chamber pressure sensor 11 and the target chamber pressure pmb. The damper controller 9b of the second target chamber 1b is caused to execute the chamber pressure adjustment control for adjusting the chamber pressure pb of the chamber 1b to the target chamber pressure pmb (here, the set chamber pressure ppk for airflow formation).

  The system controller 10 performs the closing mode control for the third target chamber 1c as the first separate chamber that is in communication with the second target chamber 1b and the small opening 13 in response to the opening mode control. As in the case of the time, the detection of the chamber pressure sensor 11 is performed in a state where the set normal chamber pressure ppc of the third target chamber 1c is set to the target chamber pressure pmc while the constant air volume damper device 5c for the third target chamber 1c is functioning to adjust the automatic air volume. A chamber pressure that adjusts the chamber pressure pc of the third target chamber 1c to the set normal chamber pressure ppc of the third target chamber 1c by adjusting the opening of the chamber pressure adjusting damper Vc with respect to the third target chamber 1c based on the chamber pressure pc. The adjustment control is executed by the damper controller 9c of the third target chamber 1c.

  That is, in this door opening mode control, the system controller 10 fixes the opening of the chamber pressure adjusting damper Va with respect to the first target chamber 1a which is the high pressure side target chamber, and the first and second target chambers 1a and 1b. The fixed air volume damper devices 5a and 5b with respect to the air flow are fixed, and the target chamber pressure pmb of the second target chamber 1b, which is the low pressure side target chamber, is formed as an air flow forming one-way passing air flow Ka at the inter-chamber communication port 12. The chamber pressure adjustment control is executed for the second target chamber 1b, which is the low pressure side target chamber, in the state changed to the set chamber pressure ppk for the first chamber, and thereby the first target chamber 1a and the second target in the communication state Both the chamber pressures pa and pb of the chamber 1b are adjusted to the set chamber pressure ppk for airflow formation, and the pressure level relationship between the first and second target chambers 1a and 1b and the external area is set to a required appropriate level. While maintaining the relationship, Second maintaining forms one direction passing airflow Ka modest wind toward the target chamber 1b is a low-pressure side target chamber from the first target chamber 1a is the high pressure side target chamber between the communicating opening 12 chamber.

  Further, the set chamber pressure ppk for airflow formation is selected as a chamber pressure within a range between the set normal chamber pressure ppp of the second target chamber 1b and the set normal chamber pressure ppc of the third target chamber 1c. Even when the door opening mode control is performed, the height relationship between the chamber pressures pb and pc between the second target chamber 1b and the third target chamber 1c is maintained in the same relationship (pb <pc) as when the door closing mode control is performed. Thus, the passing airflow Kb in the small opening 13 is held as a passing airflow in one direction from the third target chamber 1c toward the second target chamber 1b that is the low-pressure side target chamber.

  In addition to the above-described closing mode control and opening mode control, the system controller 10 further performs "return stabilization control" when returning from the opening mode control to the closing mode control when the door 12a is closed. Specifically, the system controller 10 is configured to execute the following control operations (I) to (K) as the return stabilization control (see FIGS. 2 and 5).

  (I) When the door sensor 14 detects that the door 12a has been opened, first, the target chamber pressure pmb is changed to the set chamber pressure ppk for airflow formation by the door opening mode control. For the target chamber 1b, the target chamber pressure pmb is returned to the set normal chamber pressure ppb of the second target chamber 1b that is adopted in the closed door mode control, and the chamber pressure adjustment control for the second target chamber 1b is continued in this state.

(J) In the chamber pressure adjustment control with the target chamber pressure pmb restored as described above, the opening β of the chamber pressure adjustment damper Vb with respect to the second target chamber 1b was finally updated in the previous door closing mode control. It waits to return to the vicinity of the determination opening βav (specifically, within the set allowable range for the determination opening βav).
When the opening β of the chamber pressure adjustment damper Vb returns to within the allowable range of the determination opening βav, the chamber pressure adjustment damper Va for the first target chamber 1a whose opening is fixed by the door opening mode control is opened. Is released from the fixed state, and the chamber pressure adjustment control for the first target chamber 1a, that is, the opening degree of the chamber pressure adjustment damper Va for the first target chamber 1a is adjusted based on the detection chamber pressure pa of the chamber pressure sensor 11 The chamber pressure adjustment control for adjusting the chamber pressure pa of the target chamber 1a to the target chamber pressure pma (here, the set normal chamber pressure ppa) is resumed.

  (K) With the resumption of the chamber pressure adjustment control for the first target chamber 1a, the constant air volume damper devices 5a and 5b for the first and second target chambers 1a and 1b that have fixed the damper opening degree by the door opening mode control are provided. Release the damper opening fixed state and restart the automatic air volume adjustment function.

  That is, at the time of return from the door opening mode control to the door closing mode control, both the chamber pressure adjusting damper Va for the first target chamber 1a and the chamber pressure adjusting damper Vb for the second target chamber 1b are simultaneously opened. The first target chamber 1a, which is a high-pressure side target chamber, temporarily due to the simultaneous transient indefinite chamber pressure change in the first target chamber 1a and the second target chamber 1b due to the change. The return stabilization control prevents the chamber pressure from reversing with the second target chamber 1b, which is the low pressure side target chamber.

  In the room pressure control system shown in this embodiment, when the opening mode control is performed, the opening of the chamber pressure adjusting damper Va with respect to the first target chamber 1a which is the high pressure side target chamber is fixed. As the degree, either the opening degree of the chamber pressure adjusting damper Va at the time of switching the control from the closing mode control to the opening mode control, or an opening degree appropriately set may be adopted.

[Another embodiment]
Next, other embodiments of the present invention will be listed.

  In the above-described embodiment, in the opening mode control, the damper opening degree of the constant air amount damper device 5a for the first target chamber 1a that is the high pressure side target chamber and the constant air amount damper for the second target chamber 1b that is the low pressure side target chamber. The damper opening degree of the device 5b is fixed. However, even when the door 12a is in the open state, the automatic air volume adjustment functions of these constant air volume damper devices 5a and 5b are appropriately exhibited, and these constant air volume damper devices. In the case where the passing air volumes in 5a and 5b are stably maintained at the respective set air volumes, these constant air volume damper devices 5a and 5b may be allowed to function as they are even in the door opening mode control.

  Further, in the configuration in which the constant air amount damper device 5a for the first target chamber 1a that is the high pressure side target chamber and the constant air amount damper device 5b for the second target chamber 1b that is the low pressure side target chamber are omitted, the door is closed according to the opening and closing of the door 12a. The mode control and the door opening mode control may be performed alternatively.

  In the above-described embodiment, the third target chamber 1c having a predetermined chamber pressure ppc with respect to the second target chamber 1b that is the low-pressure side target chamber is in a communication state (or adjacent state) as a first separate chamber, In the opening mode control, the predetermined chamber pressure ppc of the second target chamber 1b and the set normal chamber pressure ppb of the second target chamber 1b, which are set as the target chamber pressure pmb of the second target chamber 1b. However, the present invention is not limited to this, and the set chamber pressure ppk for forming the airflow is not limited to the one in the desired direction at the inter-chamber communication port 12 in the door-opening state in the door-opening mode control. What is the chamber pressure that can stably form the direction-passing airflow Ka and that can maintain the high and low pressure relationship between the first and second target chambers 1a and 1b and the external region in a required relationship? It may be a room pressure.

  In addition, when the second separate chamber having a predetermined chamber pressure ppd is in a communication state or an adjacent state with respect to the first target chamber 1a that is the high-pressure side target chamber, the setting chamber for airflow formation that is adopted in the opening mode control. As the pressure ppk, a chamber pressure within a range between the set normal chamber pressure ppa of the first target chamber 1a and the predetermined chamber pressure ppd of the second separate chamber may be employed.

  In the above-described embodiment, the third target chamber 1c as the first separate chamber that is in communication with or adjacent to the second target chamber 1b has a chamber pressure ppc higher than the set normal chamber pressure ppb of the second target chamber 1b. However, the chamber pressure ppc of the first separate chamber that is in communication with or adjacent to the second target chamber 1b and the second pressure that is in communication with or adjacent to the first target chamber 1a are shown. The chamber pressure ppd of the separate chamber is either the high-pressure side chamber pressure or the low-pressure side chamber pressure with respect to the set normal chamber pressure ppa of the first target chamber 1a and the set normal chamber pressure ppb of the second target chamber 1b. Also good.

  In the above-described embodiment, as the control mode of the opening mode control, the opening degree of the chamber pressure adjusting damper Va with respect to the first target chamber 1a which is the high pressure side target chamber is fixed and the second target chamber which is the low pressure side target chamber. With the target chamber pressure pmb of 1b changed from the set normal chamber pressure ppb adopted in the closed door mode control to the set chamber pressure ppk for airflow formation, the chamber pressure adjustment control is performed for the second target chamber 1b which is the low pressure side target chamber. In contrast to this, the control mode to be executed is shown. On the contrary, as the control mode of the opening mode control, the opening degree of the chamber pressure adjusting damper Vb with respect to the second target chamber 1b which is the low pressure side target chamber is fixed. In addition, in the state where the target chamber pressure pma of the first target chamber 1a which is the high pressure side target chamber is changed from the set normal chamber pressure ppa adopted in the closed door mode control to the set chamber pressure ppk for air flow generation, The first subject is It may be adopted a control mode for executing the chamber pressure adjustment control for 1a.

  Further, these two control modes may be selectively adopted as appropriate by giving a switching command to the system controller 10 or the like.

  In the above-described embodiment, the chamber pressure adjusting dampers Va and Vb are provided on the exhaust air flow path 7 side of the first target chamber 1a that is the high-pressure side target chamber and the second target chamber 1b that is the low-pressure side target chamber. Although the case is shown, the chamber pressure adjusting dampers Va and Vb are interposed on the supply air passage 4 side with respect to each of the first target chamber 1a which is the high pressure side target chamber and the second target chamber 1b which is the low pressure side target chamber. A configuration may be adopted.

  In the above-described embodiment, as the return stabilization control, the target chamber pressure pmb is set for the target chamber 1b on the side where the target chamber pressure pmb has been changed to the set chamber pressure ppk for airflow formation during the door opening mode control. After returning to the set normal chamber pressure ppb adopted in the closing mode control, the opening β of the chamber pressure adjusting damper Vb with respect to the target chamber 1b is the determination opening βav or in the vicinity thereof (specifically, the determination opening βav) Is released from the fixed opening state to the target chamber 1a on the side where the opening degree of the chamber pressure adjusting damper Va is fixed by the door opening mode control. The room pressure adjustment control for 1a was resumed, but instead, as the return stabilization control, the target room pressure pmb was changed to the set room pressure ppk for airflow formation during the door opening mode control. About the target room 1b When the set return time t has elapsed after the target chamber pressure pmb is returned to the set normal chamber pressure ppb adopted in the door closing mode control, the object on the side where the opening degree of the chamber pressure adjusting damper Va is fixed by the door opening mode control The room pressure adjustment damper Va for the chamber 1a may be released from the fixed opening state, and the room pressure adjustment control for the target chamber 1a may be resumed.

  It should be noted that it is desirable that the allowable range (for example, βav ± 5%) of the determination opening βav can be appropriately changed.

  The room pressure control system according to the present invention includes various types of clean room facilities and experimental facilities each including a high pressure side target chamber 1a and a low pressure side target chamber 1b each having a room pressure adjustment and having a communication port with a door. Can be employed in the facility.

System configuration diagram of room pressure control system Control switching flowchart Closed mode control flowchart Opening mode control flowchart Flow chart of return stabilization control

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a High pressure side target room 1b Low pressure side target room 4 Supply air path 7 Exhaust air path Va, Vb Room pressure adjustment damper 11 Room pressure sensor pa, pb Room pressure pma, pmb Target room pressure 10 Control means 12 Intercommunicating port 12a Door 14 Opening / closing detection means ppa, ppb set normal chamber pressure Ka passing airflow ppk set chamber pressure for airflow formation ppc predetermined chamber pressure 1c first separate chamber 5a, 5b constant air quantity damper device βav determination opening t setting return time

Claims (8)

A supply air passage and an exhaust air passage are connected to each of the high pressure side target chamber and the low pressure side target chamber, and each of the air supply passage and the exhaust air passage is connected to each of the air passages on either side. Install a chamber pressure adjustment damper for the target room,
Control means for executing, for each target chamber, chamber pressure adjustment control for adjusting the chamber pressure of the target chamber to the target chamber pressure by adjusting the opening of the chamber pressure adjusting damper according to the detected chamber pressure of the target chamber by the chamber pressure sensor. A room pressure control system provided,
An open / close detection means for detecting opening / closing of the door at the communication port between the high pressure side target chamber and the low pressure side target chamber is provided,
The control means is based on the detection information of the opening / closing detection means.
When the door is in a closed state, the set normal chamber pressure for the high pressure side target chamber is set to the target chamber pressure of the high pressure side target chamber, and the set normal chamber pressure for the low pressure side target chamber lower than that is set to the low pressure side target. In the state of the target chamber pressure of the chamber, the door closing mode control for performing the chamber pressure adjustment control for each of the high pressure side target chamber and the low pressure side target chamber is performed,
And when the door is in an open state, the opening of the chamber pressure adjusting damper with respect to either one of the high pressure side target chamber and the low pressure side target chamber is fixed, and the other target chamber Opening mode control for executing the chamber pressure adjustment control for the other target chamber in a state in which the target chamber pressure is changed to the setting chamber pressure for airflow formation in which the one-way passing airflow is formed at the communication port between the chambers. A room pressure control system configured to be implemented.   In the state where the high pressure side target chamber is the one target chamber and the low pressure side target chamber is the other target chamber, the control means is configured as the opening mode control when the door is in an open state. While adjusting the opening of the chamber pressure adjusting damper with respect to the high pressure side target chamber and changing the target chamber pressure of the low pressure side target chamber to the set chamber pressure for airflow formation, the chamber pressure adjustment is performed for the low pressure side target chamber. The room pressure control system according to claim 1, wherein the room pressure control system is configured to execute control.   In the state where the low pressure side target chamber is the one target chamber and the high pressure side target chamber is the other target chamber, the control means is configured as the opening mode control when the door is in the open state. While adjusting the opening of the chamber pressure adjusting damper with respect to the low pressure side target chamber and changing the target chamber pressure of the high pressure side target chamber to the set chamber pressure for airflow formation, the chamber pressure adjustment is performed for the high pressure side target chamber. The room pressure control system according to claim 1, wherein the room pressure control system is configured to execute control. The low pressure side target chamber is in communication with or adjacent to the first separate chamber having a predetermined chamber pressure separately from the high pressure side target chamber.
4. The set chamber pressure for forming the air flow is set to a chamber pressure within a range between a predetermined chamber pressure of the first separate chamber and a set normal chamber pressure for the low-pressure side target chamber. The room pressure control system according to Item. The high pressure side target chamber is in communication with or adjacent to the second separate chamber having a predetermined chamber pressure, separately from the low pressure side target chamber.
The set air pressure forming chamber pressure is a chamber pressure within a range between a predetermined chamber pressure of the second separate chamber and a set normal chamber pressure for the high-pressure side target chamber. The room pressure control system according to Item. An automatic air volume adjustment function for adjusting the passing air volume to the set air volume by adjusting the damper opening is provided in the air path on the side different from the intervening side of the chamber pressure adjusting damper in the supply air path and the exhaust air path. It is equipped with a constant air volume damper device,
The control means is configured to cause the constant air volume damper device to perform an automatic air volume adjustment function when the door is in a closed state, and to fix a damper opening of the constant air amount damper device when the door is in an open state. The room pressure control system according to any one of claims 1 to 5. The control means measures the opening degree of the chamber pressure adjusting damper with respect to the other target chamber when the door closing mode control is performed, and stores the measured opening degree as a determination opening degree.
Thereafter, when returning from the opening mode control to the closing mode control accompanying the closing of the door, the target chamber pressure of the other target chamber is adopted in the closing mode control from the set chamber pressure for airflow formation. When the opening of the chamber pressure adjusting damper with respect to the other target chamber returns to the opening for determination or in the vicinity thereof by the chamber pressure adjustment control after returning to the set normal chamber pressure for the other target chamber The chamber according to any one of claims 1 to 6, wherein the chamber pressure adjustment damper for the target chamber is released from a fixed opening state and the chamber pressure adjustment control for the one target chamber is resumed. Pressure control system.   When the control means returns from the opening mode control to the closing mode control accompanying the closing of the door, the control unit changes the target chamber pressure of the other target chamber from the set chamber pressure for airflow formation to the closing mode. After returning to the set normal chamber pressure for the other target chamber adopted in the control, when the set return time has elapsed, the chamber pressure adjusting damper for the one target chamber is released from the fixed opening state and the one target chamber is released. The room pressure control system according to claim 1, wherein the room pressure adjustment control is resumed.

Images