JP4976154B2 - Room pressure control system using multi-stage CAV - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a room pressure control system capable of flowing air from a first room having high target indoor air pressure to a second room having low target indoor air pressure when a door is opened. <P>SOLUTION: This room pressure control system 10A has a door opening detecting means which detects the opening of the opened door 24 by classifying into first to third opening, and an air flow direction regulating means which flows air from the first room 11 having the high target indoor air pressure toward the second room 12 having the low target indoor air pressure when the door 24 is opened at the first opening. In the air flow direction regulating means, a first constant air volume unit 17 gradually maintains the volume of air passing through the first constant air volume unit at a plurality of first changed values larger than an initial set value and sequentially increasing the volume of air passed from the first opening toward the third opening, and a second constant air volume unit 18 gradually maintains the volume of air passing through the second constant air volume unit at a plurality of second changed values smaller than the initial set value and sequentially reducing the volume of air passed from the first opening toward the third opening. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention maintains the indoor air pressure of the adjacent room through the door at the target indoor air pressure when the door is in the closed state, and also through the opened door when the door is in the open state. The present invention relates to a room pressure control system using a multi-stage CAV that causes air to flow from a first chamber having a high target chamber pressure among connected chambers toward a second chamber having a low target chamber pressure.

  Room pressure measurement means for detecting the indoor pressure of a plurality of adjacent rooms via a door, and door opening / closing detection means for detecting the opening / closing of a door connecting the chambers, and the chambers measured by the pressure measurement means. Based on the atmospheric pressure, adjust the room pressure adjustment dampers installed in the air supply duct or exhaust duct connected to the chambers, and maintain the indoor atmospheric pressure of the rooms at the initial target indoor pressure set individually in those rooms There is a pressure control system (see Patent Document 1).

When this room pressure control system determines that the doors have been opened by the door open / close detection means, it changes the preset initial target room pressure of the rooms, and connects the rooms connected via the opened doors. When it is determined that the doors are closed by the door open / close detection means, the changed target room pressure is returned to the initial target room pressure, and the room room pressure is changed to the initial target room pressure. Return to the initial target room pressure set individually for the room. In this system, after the opened door is closed, the control amount of the indoor pressure does not fluctuate periodically, and the steady state of the damper for adjusting the room pressure (which becomes constant over time) Can be prevented from swaying (hunting).
JP-A-10-83221

  In the room pressure control system disclosed in the publication, since the initial target indoor pressure of the rooms connected through the opened door is changed to match the target indoor pressure of the rooms, when the door is opened, The air may flow from the second chamber having a low initial target indoor pressure to the first chamber having a high initial target indoor pressure among the rooms connected through the open space of the door. Cannot flow in one direction from the first chamber toward the second chamber. For example, this system performs an operation with a high risk of air contamination in the second chamber, and when performing other operations in the first chamber, air contaminated during the opening of the door passes through the open space of the door. The first chamber may flow into the first chamber and become contaminated, and the contaminated air cannot be safely exhausted through a predetermined route.

  The object of the present invention is to maintain the indoor air pressure of the adjacent room through the door at the target indoor air pressure when the door is in the closed state, and the door is opened when the door is in the open state. An object of the present invention is to provide a room pressure control system capable of reliably flowing air from a first chamber having a high target indoor pressure among rooms connected through a door toward a second chamber having a low target indoor pressure.

  The premise of the present invention for solving the above problems is that at least two chambers adjacent to each other through doors, an air supply pipe that is individually connected to each chamber and supplies air to each chamber, and each chamber has An exhaust pipe that is individually connected and exhausts air from the chambers, and a constant air volume unit that is attached to at least the exhaust pipe of the supply pipe and the exhaust pipe, and the door is closed This is a room pressure control system using a multi-stage CAV in which the constant air volume unit maintains the air passage amount passing therethrough at an initial set value so that the indoor air pressure of each chamber can be maintained at the target indoor air pressure.

The feature of the present invention based on the premise is that the room pressure control system detects the opening degree of the opened door by dividing the opening degree into a plurality of first to nth predetermined opening degrees, and the door is predetermined. When the door is opened to the opening degree, air from the first chamber having a higher target indoor pressure among the chambers connected through the open space of the door toward the second chamber having a lower target indoor pressure than the first chamber. Air flow direction regulating means for flowing the second chamber so that a predetermined amount of air flows from the first chamber into the second chamber through the open space of the opened door. The first constant airflow unit attached to the exhaust pipe leading to the air passage amount passing therethrough is greater than the initial set value, and the air passage amount is sequentially from the first predetermined opening to the nth predetermined opening. stepwise held in the first change value of a plurality of increases, the first constant air volume unit is the door opening Air passing through the first constant air volume unit by interrupting the air flow direction restricting means when the door is completely closed and the opening of the door becomes smaller than the first predetermined opening. The amount is maintained from the first change value to the initial setting value again, and the indoor air pressures of the first and second chambers adjacent via the closed door are maintained at the target indoor air pressure .

As an example of the present invention, the airflow direction regulating means is attached to an exhaust pipe connected to the first chamber so that a predetermined amount of air flows from the first chamber into the second chamber through the open space of the opened door. A plurality of second airflow units that pass through the second constant airflow rate unit less than the initial set value, and the airflow rate decreases in order from the first predetermined opening to the nth predetermined opening. The second constant airflow unit is held in a stepwise manner, and the second constant airflow unit is before the door that has been opened is completely closed, and when the opening of the door becomes smaller than the first predetermined opening In addition, the first and second chambers adjacent to each other through the closed doors are held again from the second changed value to the initial set value by interrupting the air flow direction regulating means and passing through the second constant air volume unit. Is maintained at the target indoor pressure .

As another example of the present invention, in the airflow direction regulating means, an air supply pipe connected to the second chamber so that a predetermined amount of air flows into the second chamber from the first chamber through the open space of the opened door. The third constant airflow unit attached to the plurality of air passages through which the air passage amount is smaller than the initial set value, and the air passage amount sequentially decreases from the first predetermined opening toward the nth predetermined opening. The third constant airflow unit is held stepwise at the third change value, and the opening of the door is smaller than the first predetermined opening before the door that has been opened is completely closed. The air flow direction restricting means is interrupted and the air passage amount passing through the third constant air amount unit is maintained from the third change value to the initial set value again, and the first and second adjacent air through the closed doors. The room pressure of the two rooms is maintained at the target room pressure .

As another example of the present invention, in the airflow direction regulating means, an air supply pipe connected to the first chamber so that a predetermined amount of air flows into the second chamber from the first chamber through the open space of the opened door. The fourth constant airflow unit attached to the plurality of air passages through which the air passage amount is larger than the initial set value, and the air passage amount sequentially increases from the first predetermined opening toward the nth predetermined opening. The fourth constant airflow unit is held in stages at the fourth change value, and the opening of the door is smaller than the first predetermined opening before the door that has been opened is completely closed. The air flow direction restricting means is interrupted and the air passage amount passing through the fourth constant air amount unit is held again from the fourth change value to the initial set value, and the first and second adjacent air through the closed doors. The room pressure of the two rooms is maintained at the target room pressure .

According to the room pressure control system of the present invention, when the door is opened to the first to nth predetermined openings, the first constant airflow unit attached to the exhaust pipe connected to the second chamber passes therethrough. By holding stepwise at a plurality of first change values where the air passage amount is larger than the initial set value and the air passage amount sequentially increases from the first predetermined opening to the nth predetermined opening, A larger amount of air is discharged from the second chamber through the exhaust pipe to the outside than when the door is closed, and the amount of air discharged from the second chamber to the outside gradually increases as the door opens. Therefore, air easily flows from the first chamber to the second chamber, and air can surely flow from the first chamber toward the second chamber while the door is open. Since the room pressure control system can flow air from the first chamber toward the second chamber while the door is open, even if the air in the second chamber is contaminated, It does not flow from the two chambers toward the first chamber, and polluted air can be safely exhausted to the outside through a predetermined path, and the spread of air contamination to all the chambers can be prevented. Since this room pressure control system returns the air passage amount passing through the first constant air flow unit from the first change value to the initial set value again before the door is completely closed, the air passage amount after the door is closed. Compared with the case where the first change value is returned to the initial setting value, the instable state of the indoor pressure in each room after the doors are closed can be prevented. It is possible to quickly return to a preset target indoor pressure.

When the door is opened at the first to nth predetermined opening, the second constant airflow unit attached to the exhaust pipe connected to the first chamber has an air passage amount passing thereunder less than the initial set value, In addition, before the door that has been opened is completely closed, it is held in stages at a plurality of second change values in which the air passage amount decreases sequentially from the first predetermined opening to the nth predetermined opening. Then, when the opening degree of the door becomes smaller than the first predetermined opening degree, the air flow direction regulating means is interrupted and the air passing amount passing through the second constant air amount unit is initialized again from the second change value. The room pressure control system that maintains the indoor air pressure of the first and second chambers adjacent to each other through the closed door at the target indoor air pressure is less than when the door is closed. As it passes through the first chamber and is discharged to the outside, it increases as the door opening increases. Since the amount of air discharged from the chamber to the outside gradually decreases, air easily flows from the first chamber to the second chamber, and air is reliably transferred from the first chamber toward the second chamber while the door is open. It can be made to flow. Since the room pressure control system can flow air from the first chamber toward the second chamber while the door is open, even if the air in the second chamber is contaminated, The contaminated air can be safely exhausted outside the room through a predetermined route without flowing from the two rooms toward the first room. This room pressure control system returns the air passage amount passing through the second constant air volume unit from the second change value to the initial set value again before the door is completely closed, so that the air passage amount after the door is closed. Compared with returning the initial value to the initial value from the second change value, the instable state of the room air pressure in each room after closing the door can be prevented. It is possible to quickly return to a preset target indoor pressure.

When the door is opened at the first to nth predetermined opening, the third constant airflow unit attached to the air supply pipe connected to the second chamber has an air passage amount passing therethrough less than the initial set value, In addition, before the door that has been opened is completely closed, the first changed opening is gradually held from the first predetermined opening to the nth predetermined opening, and the plurality of third change values are gradually reduced. Then, when the opening degree of the door becomes smaller than the first predetermined opening degree, the air flow direction regulating means is interrupted and the air passing amount passing through the third constant air amount unit is initialized again from the third change value. The room pressure control system that maintains the indoor air pressure of the first and second chambers adjacent to each other through the closed door at the target indoor air pressure has the amount of air supplied from the supply pipe to the second chamber. It is less than when the door is closed, and is supplied to the second chamber as the door opens. Since the amount of air is gradually reduced, the air easily flows from the first chamber to the second chamber, and the air can surely flow from the first chamber toward the second chamber while the door is open. . Since the room pressure control system can flow air from the first chamber toward the second chamber while the door is open, even if the air in the second chamber is contaminated, The contaminated air can be safely exhausted outside the room through a predetermined route without flowing from the two rooms toward the first room. This room pressure control system returns the air passage amount passing through the third constant air flow unit from the third change value to the initial set value again before the door is completely closed, so that the air passage amount after the door is closed. Compared with the case where the third change value is returned to the initial setting value, the instable state of the room air pressure in each room after the door is closed can be prevented. It is possible to quickly return to a preset target indoor pressure.

When the door is opened at the first to nth predetermined opening, the fourth constant airflow unit attached to the air supply pipe connected to the first chamber has an air passage amount passing therethrough that is larger than the initial set value, In addition, before the door that has been opened is completely closed, it is held in stages at a plurality of fourth change values in which the air passage amount increases in order from the first predetermined opening to the nth predetermined opening. Then, when the opening degree of the door becomes smaller than the first predetermined opening degree, the air flow direction regulating means is interrupted and the air passing amount passing through the fourth constant air amount unit is initialized again from the fourth change value. The room pressure control system that maintains the indoor air pressure of the first and second chambers adjacent to each other via the closed door at the target indoor air pressure is such that the amount of air supplied from the supply pipe to the first chamber is It is supplied to the first chamber as the door is closed and the door opening is increased. Since the amount of air is progressively more apt air to flow from the first chamber to the second chamber, it is possible to reliably flow the air into the door opening of the door toward the first chamber to the second chamber. Since the room pressure control system can flow air from the first chamber toward the second chamber while the door is open, even if the air in the second chamber is contaminated, The contaminated air can be safely exhausted outside the room through a predetermined route without flowing from the two rooms toward the first room. This room pressure control system returns the air passage amount passing through the fourth constant air flow unit from the fourth change value to the initial set value again before the door is completely closed, so that the air passage amount after the door is closed. Compared with the case where the fourth change value is returned to the initial setting value, the instable state of the indoor pressure in each room after the doors are closed can be prevented. It is possible to quickly return to a preset target indoor pressure.

  The details of the room pressure control system according to the present invention will be described below with reference to the accompanying drawings. 1 and 2 are conceptual diagrams of a room pressure control system 10A shown as an example. FIG. 3 is a conceptual diagram of the chamber pressure control system 10A showing the first and second chambers 11 and 12 from the side, and FIG. 4 is a perspective view of the door 24 shown in the opened state. FIG. 5 is a flowchart showing an example of a process executed by the system 10A. 1 and 2 show the first and second chambers 11 and 12 from above. 1 and 3, the doors 24 and 25 are in a closed state (closed state). In FIG. 2, the door 25 is in a closed state, and the door 24 is in a state where the door 24 is opened beyond a predetermined opening (a door open state).

  The chamber pressure control system 10A includes an air supply duct 13 (supply pipe) that supplies a predetermined amount of air to two adjacent chambers 11 and 12, and an exhaust duct 14 that discharges a predetermined amount of air from the chambers 11 and 12 ( Exhaust pipe), constant air volume units 15 and 16 (third and fourth constant air volume units) (multistage CAV) attached to the air supply duct 13, and constant air volume units 17 and 18 attached to the exhaust duct 14 (multistage CAV). The first and second constant air volume units) (multi-stage CAV) and the open / close sensor 19 are formed. It should be noted that the number of chambers is not limited to the two shown in the figure, and each process of the system 10A can be performed in a room exceeding two.

  The chambers 11 and 12 are divided into a first chamber 11 (high pressure chamber) having a high target chamber pressure and a second chamber 12 (low pressure chamber) having a target chamber pressure lower than that of the first chamber 11. The target indoor pressure in the first and second chambers 11 and 12 is higher than the outdoor pressure. The first chamber 11 and the second chamber 12 are partitioned by a side wall 20, and further partitioned from the outside by a ceiling 21, a floor 22, and a peripheral wall 23 that surround the four sides of the chambers 11 and 12. There is no particular limitation on the target indoor pressure of the chambers 11 and 12, and the target indoor pressure can be freely set according to the use of the chambers 11 and 12, the volume of the chambers 11 and 12, and the like. There is no particular limitation on the use and volume of the chambers 11 and 12. Moreover, the target indoor atmospheric pressure of the first and second chambers 11 and 12 may be lower than the outdoor atmospheric pressure.

  On the side wall 20, a door 24 that connects the first chamber 11 and the second chamber 12 is installed. A door 25 that connects the second chamber 12 and the outside is installed on the peripheral wall 23. One vertical side portion 26 of the door 24 is attached to the side wall 20 via a hinge (not shown). The door 24 is a swing-type single-open door that swings around the vertical side portion 26 (see FIG. 4). The door 24 can be swung from the first chamber 11 toward the second chamber 12, but cannot be swung from the second chamber 12 toward the first chamber 11. The door 24 turns in the range of 0 to 180 degrees with respect to the side wall 20. One vertical side portion of the door 25 is attached to the peripheral wall 23 via a hinge (not shown). Similarly to the door 24, the door 25 is a swing-type single-open door that revolves around the side in the vertical direction, and revolves within a range of 0 to 180 degrees with respect to the peripheral wall 23. When the door 24 is opened, the chambers 11 and 12 are connected through the open space 27 of the door 24, and the first chamber 11 and the second chamber 12 can be moved back and forth through the open space 27. When the door 25 is opened, the second chamber 12 and the outdoor can be connected through the open space of the door 25, and the second chamber 12 and the outdoor can be moved back and forth through the open space. The doors 24 and 25 are made of airtight to keep the chambers 11 and 12 airtight. The door knob 28 is a gremon handle, and locks (rotates) the glemon handle after the doors 24 and 25 are closed, thereby improving the airtightness of the doors 24 and 25.

  The open / close sensor 19 is formed of three open / close sensors 19A, 19B, and 19C that detect opening and closing of the door 24. These open / close sensors 19A, 19B, and 19C are attached to the door frame of the side wall 20 in which the door 24 is housed on the hinge side. These sensors 19A, 19B, and 19C are connected to the controllers of the constant airflow units 17 and 18 through an interface 36 (wired or wireless). Magnet switches are used for the sensors 19A, 19B, and 19C. By using the play (stroke) until the sensors 19A, 19B, 19C (magnet switches) react, it is possible to provide a difference in the door turning angle to which the sensors 19A, 19B, 19C react. By selecting the mounting position of 19C, the opening degree of the door 24 to which the sensors 19A, 19B, and 19C react can be freely adjusted. As shown in FIG. 4, the opening degree of the door 24 refers to an angle θ (a door turning angle θ) formed by the side wall 20 and the door 24 when the door 24 is opened.

  In this system 10A, the opening degree of the door 24 opened by the open / close sensors 19A, 19B, and 19C is detected by being classified into a first opening to a third opening (first to nth predetermined opening). . When only the sensor 19A reacts, the opening degree of the door 24 is 15 degrees (first opening degree), and when the sensor 19A and the sensor 19B react, the opening degree of the door 24 is 30 degrees (second opening degree). When the sensors 19A, 19B, and 19C react, the mounting positions of the sensors 19A, 19B, and 19C are adjusted so that the opening degree of the door 24 becomes 60 degrees (third opening degree). In other words, the sensor 19A reacts when the opening degree of the door 24 reaches 15 degrees, an ON signal is output from the sensor 19A to the controller, and an OFF signal is output from the sensors 19B and 19C to the controller. Is done. When the opening degree of the door 24 reaches 30 degrees, the sensors 19A and 19B react, and an ON signal is output from the sensors 19A and 19B to the controller, and an OFF signal is output from the sensor 19C to the controller. Is done. When the opening degree of the door 24 reaches 60 degrees, all the sensors 19A, 19B, 19C react and an ON signal is output from the sensors 19A, 19B, 19C to the controller. In the door 24, three sensors 19A, 19B, and 19C (magnet switches) are attached in the vicinity thereof, but there is no particular limitation on the type, number, and mounting position of the sensors, and the opening degree of the door 24 can be detected. In this embodiment, the type and number of sensors and the mounting position can be determined freely.

  The air supply duct 13 is formed of a main duct 29 and two branch ducts 30 branched from the main duct 29 and extending toward the chambers 11 and 12. An air supply blower 31 for supplying a predetermined amount of air toward the chambers 11 and 12 is attached to the main duct 29. These branch ducts 30 are connected to an air supply port (not shown) provided in the ceiling 21 of the rooms 11 and 12 and are individually connected to the rooms 11 and 12. The exhaust duct 14 is formed by a main duct 32 and two branch ducts 33 branched from the main duct 32 and extending toward the chambers 11 and 12. An exhaust fan 34 that exhausts a predetermined amount of air toward the outside of the room is attached to the main duct 32. The branch ducts 33 are connected to the exhaust ports 35 provided in the peripheral walls 23 of the chambers 11 and 12 and are individually connected to the chambers 11 and 12.

  One constant air volume unit 16 (fourth constant air volume unit) is attached to the branch duct 30 (air supply duct 13) connected to the first chamber 11. One constant air volume unit 18 (second constant air volume unit) is attached to the branch duct 33 (exhaust duct 14) connected to the first chamber 11. One constant air volume unit 15 (third constant air volume unit) is attached to the branch duct 30 (air supply duct 13) connected to the second chamber 12. One constant air volume unit 17 (first constant air volume unit) is attached to the branch duct 33 (exhaust duct 14) connected to the second chamber 12. Although not shown, the constant air volume units 15, 16, 17, 18, the sensor 19, the air supply fan 31, and the exhaust air fan 34 are supplied with predetermined power via wiring.

  The constant air volume units 15, 16, 17, 18 adjust the amount of air passing through the units 15, 16, 17, 18 in response to fluctuations in the internal pressure of the ducts 30, 33 and supply the air to the chambers 11, 12. While keeping the amount constant, the amount of air discharged from the chambers 11 and 12 is kept constant. These constant airflow units 15, 16, 17, and 18 are formed from a motor damper and a controller, and a housing for housing them (not shown). The damper is formed by a modular roll motor (rotating machine), a swirl blade that swirls via the driving force of the motor, and an air flow path that is opened and closed by swirling of the swirl blade. In the constant air volume units 15, 16, 17, and 18, the modular roll motor rotates in response to a control signal from the controller, and the swirl vanes revolve at a predetermined angle.

  The controllers of the constant airflow units 15, 16, 17, and 18 are microprocessors having a central processing unit that performs arithmetic processing and a memory that can store various conditions. An input device for inputting various conditions and a display device for input confirmation are connected to the controller via an interface (not shown). A controller adjusts the opening degree of the blade | wing with respect to an air flow path so that the air passage amount which passes an air flow path may become a preset value. The memory of the controller of the constant air volume units 17 and 18 has a correlation between the target indoor air pressure of the chambers 11 and 12 and the air passage amount (initial setting value) passing through the constant air volume units 15, 16, 17 and 18. Stored is a correlation between the air passage amount (initial setting value) corresponding to the target indoor pressure and the opening degree (turning angle) of the swirl blade of the damper corresponding to the air passage amount. Further, the air passage amount (first and second change values) passing through the constant air volume units 17 and 18 when the door 24 is in the open state is divided into three stages corresponding to the first opening to the third opening. The correlation between the air passage amount corresponding to the first opening degree to the third opening degree and the opening degree (turning angle) of the swirl blade of the damper corresponding to the air passage amount is stored.

  The air passage amount (first change value) passing through the constant air volume unit 17 (first constant air volume unit) when the door 24 is in the open state is larger than the initial set value and is from the first opening to the first opening. The air passage amount is increased in order toward the three opening positions, and the air passage amounts are sequentially maintained at a plurality (three steps) of air passage amounts (first change value corresponding to the first opening to first change value corresponding to the third opening). . Furthermore, the air passage amount (second change value) passing through the constant air volume unit 18 (second constant air volume unit) when the door 24 is in the open state is smaller than the initial set value and the first opening degree. The air passage amount gradually decreases from the first to the third opening degree, and is gradually maintained at a plurality (three steps) of air passage amount (second change value corresponding to the first opening to second change value corresponding to the third opening degree). Is done. The air passage amount (second change value) corresponding to the third opening includes the case of zero.

  The controller activates an application program stored in the memory, and according to a predetermined operating system, condition storage means for storing various conditions, and the indoor pressure in the chambers 11 and 12 when the door 24 is in the closed state. The initial set value holding means for holding the air passage amount passing through the constant air volume units 15, 16, 17, 18 at the initial set value and the opening degree of the opened door 24 so that the air pressure can be maintained at the first pressure When the door 24 is opened to the predetermined opening (first to third opening), the door opening detecting means for detecting by dividing into the third opening (first to nth predetermined opening) And air flow direction regulating means for causing air to flow from the first chamber 11 toward the second chamber 12.

  In this system 10A, as shown by an arrow X1, a predetermined amount of air is supplied from the supply duct 13 to the chambers 11 and 12 by the supply air blower 31, and as shown by the arrow X2, the exhaust blower 34 supplies the chamber 11 by a predetermined amount. 12, a predetermined amount of air is discharged to the exhaust duct 14. In the system 10A, even if a pressure fluctuation occurs in the air flowing inside the air supply duct 13, the air passage amount of the branch duct 30 is kept constant by the constant air amount units 15 and 16, and a constant amount of air is always kept in the chamber 11. , 12. Even if pressure fluctuations occur in the air flowing through the exhaust duct 14, the air flow rate of the branch duct 33 is kept constant by the constant air volume units 17, 18, and a constant amount of air is constantly supplied from the chambers 11, 12. It is exhausted. While the doors 24, 25 are closed, the unit 15, 16, 17, 18 keeps the indoor pressure in the first and second chambers 11, 12 at the target indoor pressure, and the first and second chambers 11, 12 are closed. The indoor air pressure is higher than that outside, and the indoor air pressure in the first chamber 11 is higher than that in the second chamber 12.

  During the activation of the system 10A, the opening / closing information of the door 24 is constantly inputted to the controllers of the constant air volume units 17, 18 from the opening / closing sensors 19A, 19B, 19C. The door 24 is in the open state when the door 24 is opened and the first opening is reached. In this system 10A, the door 24 reaches 15 degrees (first predetermined opening). (When the opening / closing sensor 19A detects the opening of the door 24). However, when the opening degree of the door 24 reaches another opening degree (first predetermined opening degree) such as 20 degrees or 25 degrees, the door can be opened. The door 24 being in the closed state includes not only the case where the door 24 is closed but also the case where the opening degree of the door 24 is less than 15 degrees.

  An example of the process of the system 10A executed by the controller based on the flowchart of FIG. 5 will be described as follows. The user of the chambers 11 and 12 opens the door 25, enters the chamber 12, closes the door 25, and then turns on a switch (not shown) of the system 10A to activate the system 10A. It is assumed that the door 25 is not opened or closed during operation of the system 10A. After starting the system 10A, the controller determines various conditions necessary for executing the process of the system 10A via the input device (the target indoor pressure of the chambers 11 and 12, the door 24 being in the open state). The first opening (15 degrees), the second opening (30 degrees), and the third opening (60 degrees)) of the door 24 are input (S-1). The controller displays the presence / absence of the condition change on the display device (S-2). If these conditions are changed, the conditions are changed by the input device (S-3). When the target indoor air pressure of the chambers 11 and 12 is input, the controller passes the air passage amount (initial setting) of the constant air flow units 15, 16, 17 and 18 corresponding to the target indoor air pressure input from the correlation stored in the memory. Value) and the opening degree of the swirl vane of the damper of the constant air volume units 15, 16, 17, and 18 corresponding to the air passing amount.

  When these conditions are input and the conditions are not changed, the controllers of the constant air volume units 17 and 18 determine whether the door 24 is in a closed state based on signals input from the sensors 19A, 19B, and 19C ( S-4). When the controller determines that the door 24 is in the closed state (including the door opening degree less than 15 degrees (predetermined opening degree)), the controller maintains the air passage amount passing through the constant air volume units 17 and 18 at the initial setting value. The initial set value holding means is executed (S-5). In the initial set value holding means, the controller adjusts the opening degree of the swirl vane of the damper so that the air passage amount passing through the constant air volume units 17 and 18 becomes an air passage amount (initial set value) corresponding to the target indoor pressure. The opening degree corresponding to the air passing amount (initial setting value) is maintained. Thereby, the indoor air pressure of the chambers 11 and 12 is maintained at the target indoor air pressure.

For example, by setting the amount of air passing through the constant air volume unit 16 to 1550 [m ³ / h], the air supplied to the first chamber 11 is held at 1550 [m ³ / h], and the constant air volume unit 15 By setting the amount of air passing through the air to 750 [m ³ / h], the air supplied to the second chamber 12 is held at 750 [m ³ / h]. Furthermore, by setting the air passage amount passing through the constant air amount unit 18 to 1500 [m ³ / h] (initial setting value), the air discharged from the first chamber 11 is held at 1500 [m ³ / h]. By setting the air passage amount passing through the constant air amount unit 17 to 700 [m ³ / h] (initial setting value), the air discharged from the second chamber 12 is held at 700 [m ³ / h]. The user selects whether to operate or stop the system 10A (S-6). When the operation of the system 10A is selected, the controller returns to step (S-2), displays the presence / absence of the condition change, and again determines whether the door 24 is in the closed state (S-4). Is determined to be in the closed state, the initial set value holding means is continuously executed (S-5). When the stop of the system 10A is selected, the switch of the system 10A is turned OFF and the system 10A is stopped.

  When the user opens the door 24 during the operation of the system 10A and the opening degree of the door 24 reaches 15 degrees (first opening degree), an ON signal is output from the sensor 19A to the controllers of the constant air volume units 17 and 18. , OFF signals are output from the sensors 19B and 19C to the controller. The controller determines that the door 24 has been opened to the first opening based on the ON signal output from the sensor 19A and the OFF signal output from the sensors 19B and 19C (door opening detecting means). Then, the initial set value holding means is interrupted, and the air flow direction regulating means is executed for the chambers 11 and 12 (S-7). In the airflow direction restricting means, the controller has a change value corresponding to the first opening (the first opening corresponding to the first opening) and the amount of air passing through the unit 17 (first constant air volume unit) is larger than the initial set value. 1), the opening degree of the swing blade of the damper of the unit 17 corresponding to the first change value corresponding to the first opening degree is determined from the correlation stored in the memory, and the opening degree of the swing blade of the damper is determined. Is changed to the determined opening and the opening is held. Further, the amount of air passing through the unit 18 (second constant air volume unit) is smaller than the initial set value and becomes a change value corresponding to the first opening (second change value corresponding to the first opening). Next, the opening degree of the damper blade of the unit 18 corresponding to the first change value corresponding to the first opening degree is determined from the correlation stored in the memory, and the opening degree of the damper blade is changed to the determined opening degree. Then, the opening degree is maintained. Thereby, as indicated by an arrow X3 in FIG. 2, the air in the first chamber 11 flows into the second chamber 12 through the open space 27 of the door 24.

For example, the amount of air passing through the unit 18 (second constant air volume unit) is changed from 1500 [m ³ / h] (initial setting value) to 1200 [m ³ / h] (second change value corresponding to the first opening). By changing, the air discharged from the first chamber 11 is held at 1200 [m ³ / h], and the air passage amount passing through the unit 17 (first constant air flow unit) is 700 [m ³ / h] ( By changing the initial setting value) to 1000 [m ³ / h] (first change value corresponding to the first opening), the air discharged from the second chamber 12 is held at 1000 [m ³ / h]. The amount of air that passes through the constant air volume units 15 and 16 and is supplied to the chambers 11 and 12 is the same as when the door 24 is closed.

  Next, when the opening degree of the door 24 reaches 30 degrees (second opening degree), an ON signal is output from the sensors 19A and 19B to the controllers of the constant air volume units 17 and 18, and an OFF signal is output from the sensor 19C to the controller. Is output. Based on the ON signal output from the sensors 19A and 19B and the OFF signal output from the sensor 19C, the controller determines that the door 24 has been opened to the second opening (door opening detecting means). The air flow direction regulating means is continuously executed for the chambers 11 and 12 (S-7). The controller has a change value (first value) corresponding to the second opening and the amount of air passing through the unit 17 (first constant air flow unit) is larger than the initial set value or the first change value corresponding to the first opening. The first change value corresponding to the second opening) is determined from the correlation stored in the memory, and the opening of the swirl vane of the damper of the unit 17 corresponding to the first change value corresponding to the second opening is determined. The opening degree of the swirl blade is changed to the determined opening degree and the opening degree is maintained. Furthermore, the amount of air passing through the unit 18 (second constant air volume unit) is smaller than the initial set value or the second change value corresponding to the first opening, and the change value (second opening) corresponding to the second opening. Second change value corresponding to the degree), the opening degree of the swing blade of the damper of the unit 18 corresponding to the second change value corresponding to the second opening degree is determined from the correlation stored in the memory, and the swing blade of the damper is determined. The opening is changed to the determined opening and the opening is maintained.

For example, the amount of air passing through the unit 18 (second constant air flow unit) is changed from 1200 [m ³ / h] (second change corresponding to the first opening) to 1000 [m ³ / h] (corresponding to the second opening). By changing to the second change value), the air discharged from the first chamber 11 is held at 1000 [m ³ / h], which is smaller than the second change value corresponding to the first opening, and the unit 17 (first constant value). The amount of air passing through the air volume unit) is changed from 1000 [m ³ / h] (first change value corresponding to the first opening) to 1200 [m ³ / h] (first change value corresponding to the second opening). Thus, the air discharged from the second chamber 12 is held at 1200 [m ³ / h], which is larger than the first change value corresponding to the second opening. The amount of air that passes through the constant air volume units 15 and 16 and is supplied to the chambers 11 and 12 is the same as when the door 24 is closed.

  Further, when the opening degree of the door 24 reaches 60 degrees (third opening degree), an ON signal is output from all the sensors 19A, 19B, 19C to the controllers of the constant air volume units 17, 18. The controller determines that the door 24 has been opened to the third opening based on the ON signals output from the sensors 19A, 19B, and 19C (door opening detecting means), and the air flow is applied to the chambers 11 and 12. The direction regulating means is continuously executed (S-7). The controller has a change value (first value) corresponding to the third opening and the amount of air passing through the unit 17 (first constant air flow unit) is larger than the initial set value or the first change value corresponding to the second opening. The first change value corresponding to the third opening) is determined from the correlation stored in the memory, and the opening of the swirl vane of the damper of the unit 17 corresponding to the first change value corresponding to the third opening is determined. The opening degree of the swirl blade is changed to the determined opening degree and the opening degree is maintained. Further, the amount of air passing through the unit 18 (second constant air volume unit) is smaller than the initial set value or the second change value corresponding to the second opening, and the change value (third opening) corresponding to the third opening. Second change value corresponding to the degree), the opening degree of the swing blade of the damper of the unit 18 corresponding to the second change value corresponding to the third opening degree is determined from the correlation stored in the memory, and the swing blade of the damper is determined. The opening is changed to the determined opening and the opening is maintained.

For example, the amount of air passing through the unit 18 (second constant air flow unit) is changed from 1000 [m ³ / h] (second change corresponding to the second opening) to 800 [m ³ / h] (corresponding to the third opening). By changing to the second change value), the air discharged from the first chamber 11 is held at 800 [m ³ / h], which is smaller than the second change value corresponding to the second opening, and the unit 17 (first constant value). The amount of air passing through the air volume unit) is changed from 1200 [m ³ / h] (first change value corresponding to the second opening) to 1400 [m ³ / h] (first change value corresponding to the third opening). Thus, the air discharged from the second chamber 12 is held at 1400 [m ³ / h], which is larger than the first change value corresponding to the second opening. Alternatively, the amount of air passing through the unit 18 (second constant air volume unit) is changed from 1000 [m ³ / h] (second change corresponding to the second opening) to 0 [m ³ / h] (corresponding to the third opening). By changing to the second change value), the air discharged from the first chamber 11 is held at 0 [m ³ / h], which is smaller than the second change value corresponding to the second opening, and the unit 17 (first constant value) The air passage amount passing through the air volume unit) is changed from 1200 [m ³ / h] (first change value corresponding to the second opening) to 2200 [m ³ / h] (first change value corresponding to the third opening). Thus, the air discharged from the second chamber 12 is held at 2200 [m ³ / h], which is larger than the first change value corresponding to the second opening.

  If the air passage amount increases in order from the first opening to the third opening, the first change value corresponding to the first opening or the first change value corresponding to the second opening, There is no particular limitation on the first change value corresponding to the three opening, and the first change value corresponding to the opening can be freely set in a range larger than the initial set value. Further, if the air passage amount decreases in order from the first opening to the third opening, the first change corresponding to the first opening, the second change corresponding to the second opening, the second change value corresponding to the second opening, There is no particular limitation on the second change value corresponding to the three opening, and the second change value corresponding to the opening can be freely set within a range smaller than the initial set value. The amount of air supplied to the chambers 11 and 12 through the constant air volume units 15 and 16 is the same as when the door 24 is closed.

  The controllers of the constant air volume units 17 and 18 are configured so that the door 24 is opened (third open) by a signal input from the sensors 19A, 19B, and 19C after the door 24 is opened (third opening). (S-8). When the door 24 is in the open state (third opening), the controller continuously executes the air flow direction regulating means at the third opening in the chambers 11 and 12 (S-7). When the user closes the door 24 and the opening degree of the door 24 is less than 60 degrees and 30 degrees or more, an OFF signal is output from the sensor 19C to the controller, and an ON signal is output from the sensors 19A and 19B to the controller. Is done. The controller determines that the door 24 has changed from the third opening to the second opening based on the OFF signal output from the sensor 19C and the ON signals output from the sensors 19A and 19B (door opening detection means).

The controller of the constant air flow unit 17 opens the second opening from the correlation stored in the memory so that the amount of air passing through the unit 17 becomes the first change value corresponding to the second opening corresponding to the second opening. The opening degree of the swing blade of the damper of the unit 17 corresponding to the first change value corresponding to the degree is determined, the opening degree of the swing blade of the damper is changed to the determined opening degree, and the opening degree is held. The controller of the constant air flow unit 18 opens the second opening from the correlation stored in the memory so that the amount of air passing through the unit 18 becomes the second change value corresponding to the second opening corresponding to the second opening. The opening degree of the swirl vane of the damper of the unit 18 corresponding to the second change value corresponding to the degree is determined, the opening degree of the swirl vane of the damper is changed to the determined opening degree, and the opening degree is held. Specifically, the amount of air passing through the unit 18 is set to 800 [m ³ / h] (second change value corresponding to the third opening) or 0 [m ³ / h] (second change value corresponding to the third opening). ) To 1000 [m ³ / h] (second change value corresponding to the second opening), the air discharged from the first chamber 11 is held at 1000 [m ³ / h] and passes through the unit 17 The air passage amount to be changed from 1400 [m ³ / h] (first change value corresponding to the third opening) or 2200 [m ³ / h] (first change value corresponding to the third opening) to 1200 [m ³ / h] By setting (the first change value corresponding to the second opening), the air discharged from the second chamber 12 is held at 1200 [m ³ / h].

  When the user closes the door 24 and the opening degree of the door 24 is less than 30 degrees and 15 degrees or more, an OFF signal is output from the sensors 19A and 19B to the controllers of the constant air flow units 17 and 18, and the ON signal is Output from the sensor 19C to the controller. Based on the OFF signal output from the sensors 19A and 19B and the ON signal output from the sensor 19C, the controller determines that the door 24 has changed from the second opening to the first opening (door opening detecting means). ).

The controller of the constant air flow unit 17 opens the first opening from the correlation stored in the memory so that the amount of air passing through the unit 17 becomes the first change value corresponding to the first opening corresponding to the first opening. The opening degree of the swing blade of the damper of the unit 17 corresponding to the first change value corresponding to the degree is determined, the opening degree of the swing blade of the damper is changed to the determined opening degree, and the opening degree is held. The controller of the constant air flow unit 18 opens the first opening from the correlation stored in the memory so that the amount of air passing through the unit 18 becomes the second change value corresponding to the first opening corresponding to the first opening. The opening degree of the swirl vane of the damper of the unit 18 corresponding to the second change value corresponding to the degree is determined, the opening degree of the swirl vane of the damper is changed to the determined opening degree, and the opening degree is held. Specifically, the amount of air passing through the unit 18 is changed from 1000 [m ³ / h] (second change value corresponding to the second opening) to 1200 [m ³ / h] (second change value corresponding to the first opening). ), The air discharged from the first chamber 11 is held at 1200 [m ³ / h], and the air passage amount passing through the unit 17 is 1200 [m ³ / h] 1 change value) to 1000 [m ³ / h] (first change value corresponding to the first opening), the air discharged from the second chamber 12 is held at 1000 [m ³ / h].

When the user further closes the door 24 and before the door 24 is completely closed and the opening degree of the door 24 becomes less than 15 degrees (predetermined opening degree), an OFF signal is fixed from these sensors 19A, 19B, and 19C. It is output to the controllers of the air volume units 17 and 18. The controller determines that the door 24 has been closed based on the OFF signals output from the sensors 19A, 19B, and 19C (door opening detecting means), and returns to step (S-2) to determine whether the condition has been changed. After the display, it is determined again whether the door 24 is in the closed state (S-4). If it is determined that the door 24 is in the closed state, the airflow direction regulating means is interrupted, and the initial set value holding means is executed in the chambers 11 and 12 (S-5). Specifically, the unit 18 (second constant air volume unit) changes the amount of air passing therethrough from 1200 [m ³ / h] (second change value corresponding to the first opening) to 1500 [m ³ / h] (initial By changing to the set value), the air discharged from the first chamber 11 is held at 1500 [m ³ / h], and the unit 17 (first constant air volume unit) sets the air passing amount passing therethrough to 1000 ^[m 3 / h] by changing the (first opening degree corresponding first change value) to 700 ^[m 3 / h] (initial set value), the air discharged from the second chamber 12 700 ^{[m 3} / H].

  When the door 24 is opened to the first to third openings, the room pressure control system 10A determines the amount of air passing through the constant air volume unit 17 (first constant air volume unit) from the initial setting value. And a large amount of air than when the door 24 is closed because the air passage amount is gradually increased from the first opening to the third opening. Is discharged from the second chamber 12 to the outside through the exhaust pipe 14, and the amount of air discharged from the second chamber 12 to the outside gradually increases as the degree of opening of the door 24 increases. In addition, when the door 24 is opened to the first to third openings, the constant air volume unit 18 (second constant air volume unit) has an air passing amount that passes through the opening less than the initial set value, and Since the amount of air passing from the first opening to the third opening is held in stages at a plurality of second change values that gradually decrease, a smaller amount of air passes through the exhaust pipe 14 than when the door 24 is closed. The amount of air discharged from the first chamber 11 to the outside is gradually reduced as the opening degree of the door 24 increases. Therefore, in this room pressure control system 10A, the air easily flows from the first chamber 11 to the second chamber 12 through the open space 27 of the door 24 that has been opened, and the first air is discharged during the opening of the door 24. It is possible to flow reliably from the chamber 11 toward the second chamber 12.

Since this chamber pressure control system 10A can flow air from the first chamber 11 toward the second chamber 12 while the door 24 is opened, even if the air in the second chamber 12 is contaminated, Contaminated air does not flow from the second chamber 12 toward the first chamber 11, and the contaminated air can be safely exhausted outside the room through a predetermined route, thereby expanding the air pollution to all the rooms. Can be prevented. This room pressure control system 10A is set before the door 24 that has been opened is completely closed and when the opening of the door 24 becomes smaller than the first opening (15 degrees). Since the air passage amount passing through the air volume units 17 and 18 is returned to the initial setting value, each chamber 11 after the door 24 is closed is compared with the case where the air passage amount is returned to the initial setting value after the door 24 is closed. The instability of the 12 indoor pressures can be prevented, and the indoor air pressures of the chambers 11 and 12 can be quickly returned to the preset target indoor air pressure after the door 24 is closed.

  6 and 7 are conceptual diagrams of a chamber pressure control system 10B shown as another example, and FIG. 8 is a conceptual diagram of the chamber pressure control system 10B showing the first and second chambers 11 and 12 from the side. . 6 and 7 show the first and second chambers 11 and 12 from above. 6 and 8, the doors 24 and 25 are in a closed state (closed state). In FIG. 7, the door 25 is in a closed state, and the door 24 is in a state (opened state) in which the door 24 is opened beyond a predetermined opening degree. The system 10B shown in FIGS. 6 to 8 differs from that shown in FIGS. 1 to 3 in that the open / close sensors 19A, 19B, and 19C attached to the door 24 are fixed air flow units 15 and 16 attached to the air supply duct 13. It is also connected to the controller. In addition, the other structure of this system 10B is the same as that of FIGS. 1-3, and description of the other structure of the system 10B shown in FIGS. 6-8 is attached by attaching | subjecting the same code | symbol as FIGS. 1-3. Omitted.

  In this system 10B, the opening degree of the door 24 opened by the three open / close sensors 19A, 19B, and 19C is detected by being classified into a first opening degree to a third opening degree (first to nth predetermined opening degrees). The When only the sensor 19A reacts, the opening degree of the door 24 is 15 degrees (first opening degree), and when the sensor 19A and the sensor 19B react, the opening degree of the door 24 is 30 degrees (second opening degree). When the sensors 19A, 19B, and 19C react, the mounting positions of the sensors 19A, 19B, and 19C are adjusted so that the opening degree of the door 24 becomes 60 degrees (third opening degree).

  In the memory of the controller of the constant air volume units 15, 16, 17, and 18, the correlation between the target indoor air pressure of the chambers 11 and 12 and the amount of air passing through the units 15, 16, 17, and 18 (initial setting values) is stored. The relationship is stored, and the correlation between the air passage amount (initial setting value) corresponding to the target indoor pressure and the opening degree (turning angle) of the swirl blade of the damper corresponding to the air passage amount is stored. Furthermore, the air passage amount (first and second change values) passing through the units 15, 16, 17, 18 when the door 24 is in the open state corresponds to the first opening to the third opening. The correlation between the air passage amount corresponding to the first opening degree to the third opening degree and the opening degree (turning angle) of the swirl blade of the damper corresponding to the air passage amount is stored. Yes.

  The air passage amount (first change value) passing through the unit 17 (first constant air flow unit) when the door 24 is in the open state is larger than the initial set value and the third opening from the first opening degree. A plurality of air passage amounts (first change value corresponding to the first opening to first change value corresponding to the third opening degree) are held in stages, with the air passage amount increasing in order. The air passage amount (second change value) passing through the unit 18 (second constant air flow unit) when the door 24 is in the open state is smaller than the initial set value, and from the first opening to the third opening. A plurality of air passage amounts (second opening corresponding to the second opening to second opening corresponding to the third opening) are held step by step as the air passage decreases in order. The amount of air passing through the unit 15 (third constant air volume unit) when the door 24 is in the open state (third change value) is smaller than the initial set value, and the third opening from the first opening degree. A plurality of air passage amounts (first opening corresponding third change value to third opening corresponding third change value) in which the air passage amount decreases in order toward the degree are held in stages. Furthermore, the air passage amount (fourth change value) passing through the unit 16 (fourth constant air amount unit) when the door 24 is in the open state is larger than the initial set value and is from the first opening degree to the first opening degree. A plurality of air passage amounts (the fourth opening corresponding to the first opening to the fourth changing value corresponding to the third opening) that are gradually increased toward the three opening are gradually held. The air passage amount (second change value) and the air passage amount (third change value) corresponding to the third opening include the case of zero.

  The controllers of the constant air volume units 15, 16, 17, and 18 can maintain condition air pressure in the chambers 11 and 12 at the target indoor air pressure when the door 24 is in the closed state, with condition storage means for storing various conditions. In addition, the initial set value holding means for holding the air passage amount passing through the units 15, 16, 17, and 18 at the initial set value, and the opening degree of the opened door 24 are set to the first to third opening degrees (first Door opening detecting means for detecting in a divided manner (to nth predetermined opening) and when the door 24 is opened to a predetermined opening (first to third opening), air is discharged from the first chamber 11. Airflow direction regulating means for flowing toward the second chamber 12 is executed.

  With reference to the flowchart of FIG. 5, another example of the process of the system 10 </ b> B of FIGS. 6 to 8 executed by the controller will be described as follows. The user of the chambers 11 and 12 opens the door 25, enters the chamber 12, closes the door 25, and then activates the system 10B by turning on a switch of the system 10B. After starting the system 10B, the controller determines various conditions necessary for executing the process of the system 10B via the input device (the target indoor pressure of the chambers 11 and 12, the door 24 being in the open state). The first opening (15 degrees), the second opening (30 degrees), and the third opening (60 degrees)) of the door 24 are input (S-1). The controller displays the presence / absence of the condition change on the display device (S-2). If these conditions are changed, the conditions are changed by the input device (S-3). When the target indoor air pressure of the chambers 11 and 12 is input, the controller passes the air passage amount (initial setting) of the constant air flow units 15, 16, 17 and 18 corresponding to the target indoor air pressure input from the correlation stored in the memory. Value) and the opening degree of the swirl vanes of the dampers of the units 15, 16, 17 and 18 corresponding to the air passing amount.

  If these conditions are input and there is no change in the conditions, the controller of the constant air flow units 15, 16, 17 and 18 determines whether the door 24 is closed by the signals input from the sensors 19A, 19B and 19C. Is determined (S-4). When the controller determines that the door 24 is in the closed state (including the opening degree of the door 24 being less than 15 degrees (predetermined opening degree)), the controller initially sets the amount of air passing through the units 15, 16, 17, and 18. The initial setting value holding means for holding the value is executed (S-5). In the initial set value holding means, the controller opens the damper blades so that the amount of air passing through the units 15, 16, 17, and 18 becomes an air pass amount (initial set value) corresponding to the target indoor pressure. The degree is maintained at an opening corresponding to the air passage amount (initial setting value). Thereby, the indoor air pressure of the chambers 11 and 12 is maintained at the target indoor air pressure.

For example, by setting the amount of air passing through the unit 16 to 2000 [m ³ / h] (initial setting value), the air supplied to the first chamber 11 is maintained at 2000 [m ³ / h]. By setting the amount of air passing through 15 to 1050 [m ³ / h] (initial setting value), the air supplied to the second chamber 12 is held at 1050 [m ³ / h]. Further, by setting the amount of air passing through the unit 18 to 1900 [m ³ / h] (initial setting value), the air discharged from the first chamber 11 is held at 1900 [m ³ / h], and the unit By setting the amount of air passing through 17 to 950 [m ³ / h] (initial setting value), the air discharged from the second chamber 12 is held at 950 [m ³ / h]. Next, the user selects to operate or stop the system 10B (S-6). When the operation of the system 10B is selected, the controller returns to step (S-2), displays the presence / absence of the condition change, and then determines again whether the door 24 is in the closed state (S-4). Is determined to be in the closed state, the initial set value holding means is continuously executed (S-5). When the stop of the system 10B is selected, the switch of the system 10B is turned OFF, and the system 10B is stopped.

  When the user opens the door 24 during the operation of the system 10B and the opening degree of the door 24 reaches 15 degrees (first opening degree), the ON signal is controlled from the sensor 19A to the constant air volume units 15, 16, 17, and 18. The OFF signal is output from the sensors 19B and 19C to the controller. The controller determines that the door 24 has been opened to the first opening based on the ON signal output from the sensor 19A and the OFF signal output from the sensors 19B and 19C (door opening detecting means). Then, the initial set value holding means is interrupted, and the air flow direction regulating means is executed for the chambers 11 and 12 (S-7).

  The controller of the constant air volume unit 16 has an air passage amount that passes through the unit 16 (fourth constant air volume unit) larger than the initial set value, and a change value corresponding to the first opening degree (first opening degree corresponding to the first opening degree unit). 4 change value), the opening degree of the swing blade of the damper of the unit 16 corresponding to the fourth change value corresponding to the first opening degree is determined from the correlation stored in the memory, and the opening degree of the swing blade of the damper is determined. Is changed to the determined opening and the opening is held. The controller of the constant air volume unit 15 has an air passage amount that passes through the unit 15 (third constant air volume unit) less than the initial set value, and a change value corresponding to the first opening (the first opening corresponding 3 change value), the opening degree of the swing blade of the damper of the unit 15 corresponding to the first change degree corresponding to the first opening degree is determined from the correlation stored in the memory, and the opening degree of the swing blade of the damper is determined. Is changed to the determined opening and the opening is held. The controller of the constant air volume unit 18 has an air passage amount that passes through the unit 18 (second constant air volume unit) smaller than the initial set value, and a change value corresponding to the first opening (the first opening corresponding 2), the opening degree of the swing blade of the damper of the unit 18 corresponding to the second change value corresponding to the first opening degree is determined from the correlation stored in the memory, and the opening degree of the swing blade of the damper is determined. Is changed to the determined opening and the opening is held. The controller of the constant air volume unit 17 has an air passage amount passing through the unit 17 (first constant air volume unit) larger than the initial set value, and a change value corresponding to the first opening (the first opening corresponding 1), the opening degree of the swing blade of the damper of the unit 17 corresponding to the first change value corresponding to the first opening degree is determined from the correlation stored in the memory, and the opening degree of the swing blade of the damper is determined. Is changed to the determined opening and the opening is held. As a result, the air in the first chamber 11 flows into the second chamber 12 through the open space 27 of the door 24 as indicated by an arrow X3 in FIG.

For example, the amount of air passing through the unit 16 (fourth constant airflow unit) is changed from 2000 [m ³ / h] (initial setting value) to 2100 [m ³ / h] (fourth change value corresponding to the first opening). By changing, the air supplied to the first chamber 11 is held at 2100 [m ³ / h], which is larger than the initial setting value, and the air passing amount passing through the unit 15 (third constant air flow unit) is 1050 [ By changing from m ³ / h] (initial setting value) to 950 [m ³ / h] (third change value corresponding to the first opening), the air supplied to the second chamber 12 is more than the initial set value. It is kept at a small 950 [m ³ / h]. Further, the amount of air passing through the unit 18 (second constant air volume unit) is changed from 1900 [m ³ / h] (initial setting value) to 1800 [m ³ / h] (second change value corresponding to the first opening). By changing, the air discharged from the first chamber 11 is held at 1800 [m ³ / h], which is smaller than the initial setting value, and the air passage amount passing through the unit 17 (first constant air flow unit) is 950 [ By changing from m ³ / h] (initial setting value) to 1050 [m ³ / h] (first changing value corresponding to the first opening), the air discharged from the second chamber 12 is more than the initial setting value. The amount is kept at 1050 [m ³ / h].

  Next, when the opening degree of the door 24 reaches 30 degrees (second opening degree), an ON signal is output from the sensors 19A, 19B to the controllers of the constant air volume units 15, 16, 17, 18 and an OFF signal is output from the sensor. It is output from 19C to the controller. The controller determines that the door 24 has been opened to the second opening based on the ON signal output from these sensors and the OFF signal output from the sensors 15, 16, 17, 18 (door opening degree). Detection means) and the airflow direction regulating means are continuously executed for the chambers 11 and 12 (S-7).

  The controller of the constant air volume unit 16 has an air passage amount passing through the unit 16 (fourth constant air volume unit) larger than the initial set value and the fourth change value corresponding to the first opening, and corresponds to the second opening. From the correlation stored in the memory so that the opening of the swirl vane of the damper of the unit 16 corresponding to the second opening corresponding fourth change value is obtained. The opening degree of the swirl blade of the damper is changed to the determined opening degree and the opening degree is maintained. The controller 15 of the constant air volume unit has an air passage amount passing through the unit 15 (third constant air volume unit) smaller than the initial set value and the third change value corresponding to the first opening, and corresponds to the second opening. From the correlation stored in the memory so that the opening of the swirl vane of the damper of the unit 15 corresponding to the second change corresponding to the second opening is set to be the change value to be changed (the third change value corresponding to the second opening). The opening degree of the swirl blade of the damper is changed to the determined opening degree and the opening degree is maintained. The controller of the constant air volume unit 18 has an air passage amount passing through the unit 18 (second constant air volume unit) smaller than the initial set value and the second change value corresponding to the first opening, and corresponds to the second opening. From the correlation stored in the memory so that the opening degree of the swirl vane of the damper of the unit 18 corresponding to the second change value corresponding to the second opening degree is set to be the change value (second change value corresponding to the second opening degree). The opening degree of the swirl blade of the damper is changed to the determined opening degree and the opening degree is maintained. The controller of the constant air volume unit 17 has an air passage amount passing through the unit 17 (first constant air volume unit) larger than the initial set value and the first change value corresponding to the first opening, and corresponds to the second opening. From the correlation stored in the memory so that the opening of the swirl vane of the damper of the unit 17 corresponding to the second change corresponding to the second opening is obtained. The opening degree of the swirl blade of the damper is changed to the determined opening degree and the opening degree is maintained.

For example, the amount of air passing through the unit 16 (fourth constant airflow unit) is changed from 2100 [m ³ / h] (fourth changed value corresponding to the first opening) to 2200 [m ³ / h] (corresponding to the second opening) By changing to the fourth change value), the air supplied to the first chamber 11 is maintained at 2200 [m ³ / h], which is larger than the fourth change value corresponding to the first opening, and the unit 15 (third constant value) The amount of air passing through the air volume unit) is changed from 950 [m ³ / h] (third change value corresponding to the first opening) to 850 [m ³ / h] (third change value corresponding to the second opening). Thus, the air supplied to the second chamber 12 is held at 850 [m ³ / h], which is smaller than the third change value corresponding to the first opening. Further, the air passage amount passing through the unit 18 (second constant air flow unit) is changed from 1800 [m ³ / h] (second change value corresponding to the first opening) to 1700 [m ³ / h] (corresponding to the second opening amount). By changing to the second change value), the air discharged from the first chamber 11 is held at 1700 [m ³ / h], which is smaller than the second change value corresponding to the first opening, and the unit 17 (first constant value) The amount of air passing through the air volume unit) is changed from 1050 [m ³ / h] (first change value corresponding to the first opening) to 1150 [m ³ / h] (first change value corresponding to the second opening). Thus, the air discharged from the second chamber 12 is held at 1150 [m ³ / h], which is larger than the first change value corresponding to the first opening.

  Further, when the opening degree of the door 24 reaches 60 degrees (third opening degree), an ON signal is output from all the sensors 19A, 19B, 19C to the controllers of the constant air volume units 15, 16, 17, 18. The controller determines that the door 24 has been opened to the third opening based on the ON signals output from the sensors 19A, 19B, and 19C (door opening detecting means), and the air flow is applied to the chambers 11 and 12. The direction regulating means is continuously executed (S-7).

  The controller of the constant air volume unit 16 has an air passage amount passing through the unit 16 (fourth constant air volume unit) larger than the fourth change value corresponding to the second opening, and a change value corresponding to the third opening ( A fourth change value corresponding to the third opening) is determined from the correlation stored in the memory, and the opening of the swirl vane of the damper of the unit 16 corresponding to the fourth change value corresponding to the third opening is determined. The opening of the swirl blade is changed to the determined opening and the opening is maintained. The controller of the constant air volume unit 15 has an air passage amount passing through the unit 15 (third constant air volume unit) smaller than the third change value corresponding to the second opening, and a change value corresponding to the third opening ( A third change value corresponding to the third opening) is determined from the correlation stored in the memory, and the opening of the swirl vane of the damper of the unit 15 corresponding to the third change value corresponding to the third opening is determined. The opening of the swirl blade is changed to the determined opening and the opening is maintained. The controller of the constant air volume unit 18 has a change value corresponding to the third opening and the amount of air passing through the unit 18 (second constant air volume unit) is smaller than the second change value corresponding to the second opening. The second opening value corresponding to the third opening) is determined from the correlation stored in the memory, and the opening degree of the swirl vane of the damper of the unit 18 corresponding to the second opening corresponding second change value is determined. The opening of the swirl blade is changed to the determined opening and the opening is maintained. The controller of the constant air volume unit 17 has an air passage amount passing through the unit 17 (first constant air volume unit) larger than the first change value corresponding to the second opening and a change value corresponding to the third opening ( The first change value corresponding to the third opening) is determined from the correlation stored in the memory, and the opening of the swirl vane of the damper of the unit 17 corresponding to the first change value corresponding to the third opening is determined. The opening of the swirl blade is changed to the determined opening and the opening is maintained.

For example, the amount of air passing through the unit 16 (fourth constant airflow unit) is changed from 2200 [m ³ / h] (fourth change value corresponding to the second opening) to 2300 [m ³ / h] (corresponding to the third opening) By changing to the fourth change value), the air supplied to the first chamber 11 is held at 2300 [m ³ / h], which is larger than the second change value corresponding to the second opening, and the unit 15 (third constant value). The amount of air passing through the air volume unit) is changed from 850 [m ³ / h] (third change value corresponding to the second opening) to 750 [m ³ / h] (third change value corresponding to the third opening). Thus, the air supplied to the second chamber 12 is held at 750 [m ³ / h], which is smaller than the third change value corresponding to the second opening. Further, the air passage amount passing through the unit 18 (second constant air flow unit) is changed from 1700 [m ³ / h] (second change corresponding to the second opening) to 1600 [m ³ / h] (corresponding to the third opening). By changing to the second change value), the air discharged from the first chamber 11 is held at 1600 [m ³ / h], which is smaller than the second change value corresponding to the second opening, and the unit 17 (first constant value). The amount of air passing through the air volume unit) is changed from 1150 [m ³ / h] (first change value corresponding to the second opening) to 1250 [m ³ / h] (first change value corresponding to the third opening). Thus, the air discharged from the second chamber 12 is held at 1250 [m ³ / h], which is larger than the first change value corresponding to the second opening.

Alternatively, the amount of air passing through the unit 16 (fourth constant airflow unit) is changed from 2200 [m ³ / h] (fourth change value corresponding to the second opening) to 3000 [m ³ / h] (corresponding to the third opening) By changing to the fourth change value), the air supplied to the first chamber 11 is held at 3000 [m ³ / h], which is larger than the fourth change value corresponding to the second opening, and the unit 15 (third constant value). The amount of air passing through the air volume unit) is changed from 850 [m ³ / h] (third change value corresponding to the second opening) to 0 [m ³ / h] (third change value corresponding to the third opening). Thus, the air supplied to the second chamber 12 is held at 0 [m ³ / h], which is smaller than the third change value corresponding to the second opening. Further, the air passage amount passing through the unit 18 (second constant air flow unit) is changed from 1700 [m ³ / h] (second change value corresponding to the second opening) to 0 [m ³ / h] (corresponding to the third opening amount). By changing to the second change value), the air discharged from the first chamber 11 is held at 0 [m ³ / h], which is smaller than the second change value corresponding to the second opening, and the unit 17 (first constant value) The amount of air passing through the air volume unit) is changed from 1150 [m ³ / h] (first change value corresponding to the second opening) to 2000 [m ³ / h] (first change value corresponding to the third opening). Thus, the air discharged from the second chamber 12 is held at 2000 [m ³ / h], which is larger than the first change value corresponding to the second opening.

  The controller of the constant air flow units 15, 16, 17, and 18 is such that the door 24 is opened by a signal input from the sensors 19A, 19B, and 19C after the door 24 is opened (third opening). It is determined whether (third opening) remains (S-8). When the door 24 is in the open state (third opening), the controller continuously executes the air flow direction regulating means at the third opening in the chambers 11 and 12 (S-7). When the user closes the door 24 and the opening degree of the door 24 is less than 60 degrees and 30 degrees or more, an OFF signal is output from the sensor 19C to the controller, and an ON signal is output from the sensors 19A and 19B to the controller. Is done. The controller determines that the door 24 has changed from the third opening to the second opening based on the OFF signal output from the sensor 19C and the ON signals output from the sensors 19A and 19B (door opening detection means).

  The controller of the constant air volume unit 16 opens the second opening from the correlation stored in the memory so that the air passage amount passing through the unit 16 (fourth constant air volume unit) becomes the fourth change value corresponding to the second opening. The opening degree of the swing blade of the damper of the unit 16 corresponding to the fourth change value corresponding to the degree is determined, the opening degree of the swing blade of the damper is changed to the determined opening degree, and the opening degree is held. The controller of the constant air volume unit 15 performs the second opening from the correlation stored in the memory so that the air passage amount passing through the unit 15 (third constant air volume unit) becomes the third change value corresponding to the second opening. The opening degree of the swing blade of the damper of the unit 15 corresponding to the third change value corresponding to the degree is determined, the opening degree of the swing blade of the damper is changed to the determined opening degree, and the opening degree is held. The controller of the constant air volume unit 18 opens the second opening from the correlation stored in the memory so that the air passage amount passing through the unit 18 (second constant air volume unit) becomes the second change value corresponding to the second opening. The opening degree of the swirl vane of the damper of the unit 18 corresponding to the second change value corresponding to the degree is determined, the opening degree of the swirl vane of the damper is changed to the determined opening degree, and the opening degree is held. The controller of the constant air volume unit 17 performs the second opening from the correlation stored in the memory so that the air passage amount passing through the unit 17 (first constant air volume unit) becomes the first change value corresponding to the second opening. The opening degree of the swing blade of the damper of the unit 17 corresponding to the first change value corresponding to the degree is determined, the opening degree of the swing blade of the damper is changed to the determined opening degree, and the opening degree is held.

Specifically, the amount of air passing through the unit 16 (fourth constant air volume unit) is set to 2300 [m ³ / h] (fourth modified value corresponding to the third opening) or 3000 [m ³ / h] (third By changing from the fourth change value corresponding to the opening degree to 2200 [m ³ / h] (fourth change value corresponding to the second opening degree), the air supplied to the first chamber 11 is changed to 2200 [m ³ / h]. And the air passing amount passing through the unit 15 (third constant air flow unit) is 750 [m ³ / h] (third change value corresponding to the third opening) or 0 [m ³ / h] (third opening) By changing from the third change value corresponding to the degree) to 850 [m ³ / h] (the third change value corresponding to the second opening), the air supplied to the second chamber 12 is changed to 850 [m ³ / h]. Hold. Further, the amount of air passing through the unit 18 (second constant air flow unit) is set to 1600 [m ³ / h] (second modified value corresponding to the third opening) or 0 [m ³ / h] (corresponding to the third opening). By changing the second change value) to 1700 [m ³ / h] (second change value corresponding to the second opening), the air discharged from the first chamber 11 is held at 1700 [m ³ / h]. , 1250 [m ³ / h] (first change value corresponding to the third opening) or 2000 [m ³ / h] (the third opening corresponding number) By changing from 1 change value) to 1150 [m ³ / h] (first change value corresponding to the second opening), the air discharged from the second chamber 12 is held at 1150 [m ³ / h].

  When the user closes the door 24 and the opening degree of the door 24 is less than 30 degrees and 15 degrees or more, an OFF signal is output from the sensors 19B and 19C to the controllers of the constant air flow units 15, 16, 17, and 18. , An ON signal is output from the sensor 19A to the controller. The controller determines that the door 24 has changed from the second opening to the first opening based on the OFF signal output from the sensors 19B and 19C and the ON signal output from the sensor 19A (door opening detecting means). ).

  The controller of the constant air volume unit 16 opens the first opening from the correlation stored in the memory so that the air passage amount passing through the unit 16 (fourth constant air volume unit) becomes the fourth change value corresponding to the first opening. The opening degree of the swing blade of the damper of the unit 16 corresponding to the fourth change value corresponding to the degree is determined, the opening degree of the swing blade of the damper is changed to the determined opening degree, and the opening degree is held. The controller of the constant air volume unit 15 performs the first opening based on the correlation stored in the memory so that the air passage amount passing through the unit 15 (third constant air volume unit) becomes the third change value corresponding to the first opening. The opening degree of the swing blade of the damper of the unit 15 corresponding to the third change value corresponding to the degree is determined, the opening degree of the swing blade of the damper is changed to the determined opening degree, and the opening degree is held. The controller of the constant air volume unit 18 first opens from the correlation stored in the memory so that the air passage amount passing through the unit 18 (second constant air volume unit) becomes the second change value corresponding to the first opening. The opening degree of the swirl vane of the damper of the unit 18 corresponding to the second change value corresponding to the degree is determined, the opening degree of the swirl vane of the damper is changed to the determined opening degree, and the opening degree is held. The controller of the constant air volume unit 17 opens the first opening from the correlation stored in the memory so that the amount of air passing through the unit 17 (first constant air volume unit) becomes the first change value corresponding to the first opening. The opening degree of the swing blade of the damper of the unit 17 corresponding to the first change value corresponding to the degree is determined, the opening degree of the swing blade of the damper is changed to the determined opening degree, and the opening degree is held.

Specifically, the amount of air passing through the unit 16 (fourth constant airflow unit) is changed from 2200 [m ³ / h] (fourth change value corresponding to the second opening) to 2100 [m ³ / h] (first By changing to the fourth change value corresponding to the opening degree, the air supplied to the first chamber 11 is held at 2100 [m ³ / h], and the amount of air passing through the unit 15 (third constant air volume unit) Is changed from 850 [m ³ / h] (second modified value corresponding to the second opening) to 950 [m ³ / h] (third modified value corresponding to the first opening), and supplied to the second chamber 12 The air to be discharged is kept at 950 [m ³ / h]. Further, the air passing amount passing through the unit 18 (second constant air flow unit) is changed from 1700 [m ³ / h] (second change value corresponding to the second opening) to 1800 [m ³ / h] (corresponding to the first opening). By changing to the second change value), the air discharged from the first chamber 11 is held at 1800 [m ³ / h], and the amount of air passing through the unit 17 (first constant air flow unit) is 1150 [m / h]. m ³ / h] (the first change value corresponding to the second opening) is changed to 1050 [m ³ / h] (the first change value corresponding to the first opening), whereby the air discharged from the second chamber 12 Is maintained at 1050 [m ³ / h].

When the user further closes the door 24 and before the door 24 is completely closed and the opening degree of the door 24 becomes less than 15 degrees (predetermined opening degree), an OFF signal is fixed from these sensors 19A, 19B, and 19C. It is output to the controllers of the air volume units 15, 16, 17 and 18. The controller determines that the door 24 has been closed based on the OFF signals output from the sensors 19A, 19B, and 19C (door opening detecting means), and returns to step (S-2) to determine whether the condition has been changed. After the display, it is determined again whether the door 24 is in the closed state (S-4). If it is determined that the door 24 is in the closed state, the airflow direction regulating means is interrupted, and the initial set value holding means is executed in the chambers 11 and 12 (S-5).

Specifically unit 16 (fourth constant air volume unit) has an air throughput 2100 therethrough ^[m 3 / h] 2000 (first opening degree corresponding fourth modification value) ^[m 3 / h] (Initial By changing to the set value), the air supplied to the first chamber 11 is kept at 2000 [m ³ / h], and the unit 15 (third constant air flow unit) sets the air passing amount passing therethrough to 950 ^[m 3 / h] by changing the (first opening degree corresponding third change value) to 1050 ^[m 3 / h] (initial set value), the air supplied to the second chamber 12 1050 ^{[m 3} / H]. Further, unit 18 (second constant air volume unit) has an air throughput 1800 therethrough ^[m 3 / h] 1900 (first opening degree corresponding second change value) ^[m 3 / h] (Initial Setup Value), the air discharged from the first chamber 11 is held at 1900 [m ³ / h], and the unit 17 (first constant air flow unit) sets the air passing amount passing therethrough to 1050 [ m ³ / h] by changing the (first opening degree corresponding first change value) to 950 ^[m 3 / h] (initial set value), the air discharged from the second chamber 12 950 ^[m 3 / h].

  This room pressure control system 10B has an amount of air passage through which the first constant air volume unit 17 passes therethrough when the door 24 is opened to the first to third openings, and more than an initial set value, and Since the air passage amount is gradually increased from the first opening degree to the third opening degree, the plurality of first change values are held in stages, so that a larger amount of air passes through the exhaust pipe 14 than when the door 24 is closed. While passing through the second chamber 12 and being discharged outside, the amount of air discharged from the second chamber 12 to the outside gradually increases as the opening of the door 24 increases. When the door 24 is opened to the first to third openings, the second constant air volume unit 18 reduces the amount of air passing therethrough less than the initial set value, and from the first opening to the third opening. Since the air passage amount gradually decreases toward the second, the plurality of second change values are held in stages, so that a smaller amount of air passes from the first chamber 11 to the outside through the exhaust pipe 14 than when the door 24 is closed. As the degree of opening of the door 24 increases, the amount of air discharged from the first chamber 11 to the outside gradually decreases. When the door 24 is opened to the first to third openings, the third constant air volume unit 15 reduces the amount of air passing therethrough less than the initial set value, and from the first opening to the third opening. Since the amount of air passing is gradually reduced to a plurality of third change values, the amount of air that is smaller than that during the closing of the door 24 is supplied to the second chamber 12 through the air supply pipe 13. As the opening degree of the door 24 increases, the amount of air supplied to the second chamber 12 gradually decreases. When the door 24 is opened to the first to third openings, the fourth constant air volume unit 16 increases the amount of air passing therethrough beyond the initial set value, and from the first opening to the third opening. Since the air passage amount gradually increases toward the degree, the plurality of fourth change values are held in stages, so that a larger amount of air is supplied to the first chamber 11 through the air supply pipe 13 than when the door 24 is closed. As the opening degree of the door 24 increases, the amount of air supplied to the first chamber 11 gradually increases. Therefore, in this room pressure control system 10B, the air easily flows from the first chamber 11 to the second chamber 12 through the open space of the door 24 that is opened, and the air is supplied to the first chamber while the door 24 is opened. It is possible to reliably flow from 11 toward the second chamber 12.

Since this room pressure control system 10B can flow air from the first chamber 11 toward the second chamber 12 while the door 24 is opened, even if the air in the second chamber 12 is contaminated, Contaminated air does not flow from the second chamber 12 toward the first chamber 11, and the contaminated air can be safely exhausted outside the room through a predetermined route, thereby expanding the air pollution to all the rooms. Can be prevented. This room pressure control system 10B is set before the door 24 that has been opened is completely closed and when the opening of the door 24 becomes smaller than the first opening (15 degrees). Since the air passage amount passing through the air volume units 15, 16, 17, and 18 is returned to the initial setting value, the air passage amount after the door 24 is closed is compared with the case where the air passage amount is returned to the initial setting value after the door 24 is closed. It is possible to prevent an unstable state of the indoor pressures of the chambers 11 and 12 and to quickly return the indoor pressures of the chambers 11 and 12 to a preset target indoor pressure after the door 24 is closed.

The conceptual diagram of the room pressure control system shown as an example. The conceptual diagram of the room pressure control system shown as an example. The conceptual diagram of the chamber pressure control system which shows a 1st and 2nd chamber from the side. The perspective view of the door shown in the state opened. The flowchart which shows an example of the process which a system performs. The conceptual diagram of the room pressure control system shown as another example. The conceptual diagram of the room pressure control system shown as another example. The conceptual diagram of the chamber pressure control system which shows a 1st and 2nd chamber from the side.

10A, 10B Room pressure control system 11 First chamber 12 Second chamber 13 Air supply duct (air supply pipe)
14 Exhaust duct (exhaust pipe)
15 Constant air volume unit (3rd constant air volume unit)
16 Constant air volume unit (4th constant air volume unit)
17 Constant air volume unit (1st constant air volume unit)
18 Constant air volume unit (second constant air volume unit)
19 Open / close sensor 19A, 19B, 10C Open / close sensor 24 Door 27 Open space

Claims (4)

At least two chambers that are adjacent to each other through a door, an air supply pipe that is individually connected to each chamber and supplies air to each chamber, and is individually connected to each chamber and discharges air from each chamber The exhaust pipe and at least a constant air volume unit attached to the exhaust pipe among the air supply pipe and the exhaust pipe, and when the door is closed, the indoor air pressure of each chamber is set to the target indoor air pressure. In the room pressure control system using the multi-stage CAV in which the constant air volume unit maintains the air passage amount passing therethrough at an initial set value,
When the chamber pressure control system detects the opening degree of the opened door by dividing it into a plurality of first to nth predetermined opening degrees, and when the door is opened to the predetermined opening degree. Further, an air flow that causes air to flow from the first chamber having a higher target indoor pressure among the chambers connected through the open space of the door toward the second chamber having a lower target indoor pressure than the first chamber. Direction control means,
The air flow direction regulating means is attached to an exhaust pipe connected to the second chamber so that a predetermined amount of air flows from the first chamber into the second chamber through an open space of the opened door. The first constant airflow unit has a plurality of air passages through which the air passage amount is larger than the initial set value, and the air passage amount sequentially increases from the first predetermined opening to the nth predetermined opening. 1 step by step to change value ,
The first constant air volume unit is configured so that the air flow direction restricting means is provided before the door that has been opened is completely closed and when the opening of the door becomes smaller than the first predetermined opening. The air passing amount passing through the first constant air flow unit is maintained from the first change value to the initial set value again, and the indoor pressures of the first and second chambers adjacent through the closed door are targeted. The room pressure control system is characterized by maintaining the room pressure. The air flow direction regulating means is attached to an exhaust pipe connected to the first chamber so that a predetermined amount of air flows from the first chamber into the second chamber through an open space of the opened door. The second constant airflow unit has a plurality of first air passages through which the air passage amount is smaller than the initial set value, and the air passage amount decreases in order from the first predetermined opening to the nth predetermined opening. The second constant air volume unit is held in a stepwise manner before the door that has been opened is completely closed, and the opening of the door is smaller than the first predetermined opening. The air flow direction regulating means is interrupted and the air passage amount passing through the second constant air amount unit is maintained from the second change value to the initial set value again, and the adjacent first air is passed through the closed door. claim 1 1 and the indoor air pressure of the second chamber is maintained at the target chamber pressure Mounting of the chamber pressure control system. The air flow direction regulating means is attached to an air supply pipe connected to the second chamber so that a predetermined amount of air flows from the first chamber into the second chamber through the open space of the opened door. The third constant air volume unit has a plurality of first air passages through which the air passage amount is smaller than the initial set value, and the air passage amount sequentially decreases from the first predetermined opening to the nth predetermined opening. The third constant air volume unit is held in a stepwise manner before the door that has been opened is completely closed, and the opening of the door is smaller than the first predetermined opening. The air flow direction regulating means is interrupted, and the air passage amount passing through the third constant air amount unit is maintained from the third change value to the initial set value again, and the adjacent first through the closed door. claim 1 1 and the indoor air pressure of the second chamber is maintained at the target chamber pressure Others chamber pressure control system according to claim 2. The air flow direction regulating means is attached to an air supply pipe connected to the first chamber so that a predetermined amount of air flows from the first chamber into the second chamber through an open space of the opened door. The fourth constant airflow unit has a plurality of air passages through which the air passage amount is larger than the initial set value, and the air passage amount sequentially increases from the first predetermined opening to the nth predetermined opening. The fourth constant airflow unit is held in a stepwise manner, and the opening of the door is smaller than the first predetermined opening before the door that has been opened is completely closed. When the air flow direction restricting means stops, the air passage amount passing through the fourth constant air amount unit is maintained from the fourth change value to the initial set value again, and the second air flow passing through the door is closed. It claims 1 to maintain the target chamber pressure to 1 and the indoor air pressure in the second chamber Chamber pressure control system according to claim 3.

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