JP3552853B2 - Room pressure control system - Google Patents

Description

【００４４】
（ハ）第１の対象室１ａと第２の対象室１ｂについては、第１扉１２が開かれた時の両室の室圧変化傾向度の比Δｐａ：ΔＰｂが、近似的には両室の室容積と換気回数との積の逆比Ｄｂ×ｎｂ：Ｄａ×ｎａで与えられることから、この逆比（すなわち、室圧変化傾向度の比）で両室の目標室圧ｐｐａ，ｐｐｂどうしの間を内分する内分点に相当の下記中間値ｐｐｍを、目標室圧変更における変更目標の設定中間値とする。
ｐｐｍ＝Ｘ／Ｙ
ここで、Ｘ＝Ｄａ×ｎａ×ｐｐａ＋Ｄｂ×ｎｂ×ｐｐｂ
Ｙ＝Ｄａ×ｎａ＋Ｄｂ×ｎｂ
【００４５】
そして、この設定の下で、第１扉１２が開かれたとき（図４参照）、第１対象室１ａと第２対象室１ｂの目標室圧ｐｐａ（＝３０Ｐａ），ｐｐｂ（＝２０Ｐａ）をともに、上記の設定中間値ｐｐｍ（＝２８．８Ｐａ）に変更（ｐｐａ＝３０Ｐａ→２８．８Ｐａ，ｐｐｂ＝２０Ｐａ→２８．８Ｐａ）して、これら第１対象室１ａの目標室圧ｐｐａと第２対象室１ｂの目標室圧ｐｐｂとを一致させる。
【００４６】
また、その後、第１扉１２が閉じられたとき（同図４参照）、先の第１扉１２の開き時に変更した両対象室１ａ，１ｂの目標室圧ｐｐａ，ｐｐｂを元の値に復帰（ｐｐａ＝２８．８Ｐａ→３０Ｐａ，ｐｐｂ＝２８．８Ｐａ→２０Ｐａ）させる。
【００４７】
（ニ）第２の対象室１ｂと第３の対象室１ｃについては、第２扉１３が開かれた時の両室の室圧変化傾向度の比Δｐｂ：Δｐｃが、上述と同様、近似的に両室の室容積と換気回数との積の逆比Ｄｃ×ｎｃ：Ｄｂ×ｎｂで与えられることから、この逆比（室圧変化傾向度の比）で両室の目標室圧ｐｐｂ，ｐｐｃどうしの間を内分する内分点に相当の下記中間値ｐｐｎを、目標室圧変更における変更目標の設定中間値とする。
ｐｐｎ＝Ｘ’／Ｙ’
ここで、Ｘ’＝Ｄｂ×ｎｂ×ｐｐｂ＋Ｄｃ×ｎｃ×ｐｐｃ
Ｙ＝Ｄｂ×ｎｂ＋Ｄｃ×ｎｃ
【００４８】
そして、この設定の下で、第２扉１３が開かれたとき（図５参照）、第２対象室１ｂと第３対象室１ｃの目標室圧ｐｐｂ（＝２０Ｐａ），ｐｐｃ（＝０Ｐａ）をともに、上記の設定中間値ｐｐｎ（＝６．６Ｐａ）に変更（ｐｐｂ＝２０Ｐａ→６．６Ｐａ，ｐｐｃ＝０Ｐａ→６．６Ｐａ）して、これら第２対象室１ｂの目標室圧ｐｐｂと第３対象室１ｃの目標室圧ｐｐｃとを一致させる。
【００４９】
また、その後、第２扉１３が閉じられたとき（同図５参照）、先の第２扉１３の開き時に変更した両対象室１ｂ，１ｃの目標室圧ｐｐｂ，ｐｐｃを元の値に復帰（ｐｐｂ＝６．６Ｐａ→２０Ｐａ，ｐｐｃ＝６．６Ｐａ→０Ｐａ）させる。
【００５０】
つまり、上記（ハ），（ニ）の如く扉１２，１３の開き時に目標室圧の変更を実施して、扉１２，１３の開きで連通状態となる二つの対象室の目標室圧を一致させることにより、前述の第１実施形態の場合と同様、扉１２，１３が開き状態にある間に互いに異なる目標室圧を目指す開度調整のために室圧調整用ダンパＶａ，Ｖｂ，Ｖｃが開度調整限界やそれに近い状態にまで無意味に調整されてしまうといったことを防止し、これにより、この無意味な開度調整に原因する扉閉じ時の極端な室圧変化を防止する。
【００５１】
〔第３実施形態〕
この第３実施形態では、第１扉１２や第２扉１３が一旦開かれた後、再び閉じられたときの極端な室圧変化を防止する室圧保全手段として、前述の第１及び第２実施形態で示した如き目標室圧自動変更部１５を設けるに代え、図６に示す如く、第１対象室１ａのダンパ制御器９ａと第２対象室１ｂのダンパ制御器９ｂとに対して第１のダンパ調整状態切換器１６ａを装備し、また、第２対象室１ｂのダンパ制御器９ｂと第３対象室１ｃのダンパ制御器９ｃとに対して第２のダンパ調整状態切換器１６ｂを装備してある。
【００５２】
これらダンパ調整状態切換器１６ａ，１６ｂは、扉開閉検出器１４ａ，１４ｂによる各扉１２，１３の開閉検出に基づき、扉開閉時に、対応対象室のうちの一方の対象室の室圧調整用ダンパＶａ〜Ｖｃに対する開度調整形態を切り換えるものであり、具体的には、第１のダンパ調整状態切換器１６ａは次の（ホ）の如く開度調整形態の切り換えを行い、また、第２のダンパ調整状態切換器１６ｂは次の（ヘ）の如く開度調整形態の切り換えを行う構成としてある。
【００５３】
（ホ）第１の対象室１ａと第２の対象室１ｂについては、それらの室用途上、室圧ｐａ，ｐｂを各々の目標室圧ｐｐａ，ｐｐｂに維持することの必要性・重要性が第２対象室１ｂよりも第１対象室１ａの方が高いことから、第１扉１２の開きに対し、第１対象室１ａを主対象室とし、かつ、第２対象室１ｂを副対象室として扱う。
【００５４】
そして、この主副関係の下で、第１扉１２が開かれたとき、主対象室である第１対象室１ａの室圧調整用ダンパＶａについては、第１対象室１ａの検出室圧ｐａに基づき第１対象室１ａの目標室圧ｐｐａを目指して開度調整する独立調整状態を維持したままで、副対象室である第２対象室１ｂの室圧調整用ダンパＶｂを、第２対象室１ｂの検出室圧ｐｂに基づき第２対象室１ｂの目標室圧ｐｐｂを目指して開度調整するそれまでの独立調整状態から、主対象室である第１対象室１ａの室圧調整用ダンパＶａの開度調整に追従させて開度変化させる従動調整状態へ切り換える。

【００５５】
また、その後、第１扉１２が閉じられたとき、先の第１扉１２の開き時に従動調整状態へ切り換えた第２対象室１ｂの室圧調整用ダンパＶｂを、従動調整状態から、第２対象室１ｂの検出室圧ｐｂに基づき第２対象室１ｂの目標室圧ｐｐｂを目指して開度調整する独立調整状態へ復帰させる。

【００５６】
（へ）第２の対象室１ｂと第３の対象室１ｃについては、それらの室用途上、室圧ｐｂ，ｐｃを各々の目標室圧ｐｐｂ，ｐｐｃに維持することの必要性・重要性が第２対象室１ｂよりも第３対象室１ｃの方が高いことから、第２扉１３の開きに対し、第３対象室１ｃを主対象室とし、かつ、第２対象室１ｂを副対象室として扱う。
【００５７】
そして、この主副関係の下で、第２扉１３が開かれたとき、主対象室である第３対象室１ｃの室圧調整用ダンパＶｃについては、第３対象室１ｃの検出室圧ｐｃに基づき第３対象室１ｃの目標室圧ｐｐｃを目指して開度調整する独立調整状態を維持したままで、副対象室である第２対象室１ｂの室圧調整用ダンパＶｂを、第２対象室１ｂの検出室圧ｐｂに基づき第２対象室１ｂの目標室圧ｐｐｂを目指して開度調整するそれまでの独立調整状態から、主対象室である第３対象室１ｃの室圧調整用ダンパＶｃの開度調整に追従させて開度変化させる従動調整状態へ切り換える。

【００５８】
また、その後、第２扉１３が閉じられたとき、先の第２扉１３の開き時に従動調整状態へ切り換えた第２対象室１ｂの室圧調整用ダンパＶｂを、従動調整状態から、第２対象室１ｂの検出室圧ｐｂに基づき第２対象室１ｂの目標室圧ｐｐｂを目指して開度調整する独立調整状態へ復帰させる。

【００５９】
つまり、上記（ホ），（ヘ）の如く扉１２，１３の開き時に、連通状態となる二つの対象室のうちの一方の室圧調整用ダンパＶｂを、他方の対象室の室圧調整用ダンパＶａ，Ｖｂの開度調整に追従させて開度変化させる従動調整状態に切り換えることにより、扉１２，１３が開き状態にある間に互いに異なる目標室圧を目指す開度調整のために室圧調整用ダンパＶａ，Ｖｂ，Ｖｃが開度調整限界やそれに近い状態にまで無意味に調整されてしまうといったことを防止し、これにより、この無意味な開度調整に原因する扉閉じ時の極端な室圧変化を防止する。
【００６０】
なお、上記の従動調整状態において、一方の室圧調整用ダンパＶｂを、他方の対象室の室圧調整用ダンパＶａ，Ｖｃの開度調整に追従させて開度変化させる具体的追従方式ついては、従動調整状態に切り換えた室圧調整用ダンパＶｂを、その切り換え時点の開度から、独立調整状態維持側の室圧調整用ダンパＶａ，Ｖｃの開度変更に伴い、その変更率と同率に開度変化させる方式、あるいはまた、従動調整状態に切り換えた室圧調整用ダンパＶｂを、独立調整状態維持側の室圧調整用ダンパＶａ，Ｖｃと同開度を維持するように開度変化させる方式などを一例として挙げることができる。
【００６１】
〔別の実施形態〕
次に発明の別の実施形態を列記する。
扉が開かれたとき、この扉の開きで連通状態となる二つの対象室の目標室圧のうちの一方のみを変更して、これら対象室の目標室圧を一致させる方式を採る場合、前述の第１実施形態では、室圧を本来の目標室圧に維持することの必要性・重要性が高い方の対象室を目標室圧固定側とする例を示したが、両室に上記必要性・重要性の差がない場合などでは、扉開閉時における室圧調整用ダンパの開度調整量を極力少なくすることを目的として、扉開き時の室圧変化傾向度が小さい方の対象室を目標室圧固定側とするようにしてもよい。
【００６２】
扉が開かれたとき、この扉の開きで連通状態となる二つの対象室の目標室圧の両方を、これら目標室圧どうしの間の設定中間値に変更して、これら対象室の目標室圧を一致させる方式を採る場合、前述の第２実施形態では、扉開き時の両室の室圧変化傾向度の比で、両室の目標室圧どうしの間を内分する内分点に相当の中間値を上記の設定中間値としたが、これに代え、この内分点相当の中間値以外の中間値を上記の設定中間値とするようにしてもよい。
【００６３】
また、扉が開かれたとき、この扉の開きで連通状態となる二つの対象室の目標室圧の両方を変更して、これら対象室の目標室圧を一致させるにあたり、場合によっては、両対象室の目標室圧どうしの間から外れた値で、両対象室の目標室圧を一致させるようにしてもよい。
【００６４】
前述の第１及び第２実施形態では、扉が開かれたときに目標室圧の変更を行う室圧保全手段としての目標室圧自動変更部１５を、制御盤１０に組み込み装備する形式を示したが、この目標室圧自動変更部１５は、制御盤１０とは別の単体器で構成してもよい。
【００６５】
また、前述の第３実施形態では、扉が開かれたときに従動調整状態への切り換えを行う室圧保全手段としてのダンパ調整状態切換器１６ａ，１６ｂを、制御盤１０とは別の単体器で構成する形式を示したが、これらダンパ調整状態切換器１６ａ，１６ｂは制御盤１０に組み込み装備する形式としてもよい。
【００６６】
扉が開かれたとき、この扉の開きで連通状態となる二つの対象室のうち、一方の対象室の室圧調整用ダンパを、独立調整状態から他方の対象室の室圧調整用ダンパの開度調整に追従させて開度変化させる従動調整状態に切り換える方式を採る場合、前述の第３実施形態では、室圧を本来の目標室圧に維持することの必要性・重要性が低い方の対象室の室圧調整用ダンパを、従動調整状態に切り換える側のダンパとする例を示したが、両室に上記必要性・重要性の差がない場合などでは、扉開閉時における室圧調整用ダンパの開度調整量を極力少なくすることを目的として、扉開き時の室圧変化傾向度が大きい方の対象室の室圧調整用ダンパを、従動調整状態に切り換える側のダンパとするようにしてもよい。
【００６７】
前述の各実施形態では、各対象室の排気風路に室圧調整用ダンパを介装する形式を示したが、本発明は、室圧調整用ダンパを各対象室の給気風路に介装する形式や、室圧調整用ダンパを各対象室の給気風路と排気風路の双方に介装する形式においても適用できる。
【００６８】
扉の開閉を検出する開閉検出手段は、機械式のリミットスイッチや、光学利用により扉開閉を検出する方式、あるいは、磁気利用により開閉を検出する方式など、種々の方式のものを採用できる。
【００６９】
対象室はクリーンルームに限らず、どのような用途のものであってもよい。
【００７０】
なお、前記の第１扉１２と第２扉１３とがともに開き状態となることがある場合には、先に開かれた扉に対応する２室につき本発明を適用して、これら２室を実質的に１室として扱う前述の如き室圧制御を実施し、その上で、後の扉の開きに対して、この実質的１室扱いの２室と他の１室とについて、さらに本発明を適用する形態で、結果的に、両扉１２，１３の開きに対し、これら扉１２，１３の開きで連通状態となる三つの対象室の目標室圧のうちの２つ、又は、全部を変更して、これら三つの対象室の目標室圧を一致させる、又は、両扉１２，１３の開きに対し、これら扉１２，１３の開きで連通状態となる三つの対象室のうち、二つの対象室に対する室圧調整用ダンパを、独立調整状態から、他の三つ目の対象室に対する室圧調整用ダンパに追従させて開度変化させる従動調整状態へ切り換えようにすればよい。
【図面の簡単な説明】
【図１】第１及び第２実施形態を示すシステム構成図
【図２】第１実施形態における目標室圧の変更形態を示す図
【図３】第１実施形態における目標室圧の変更形態を示す図
【図４】第２実施形態における目標室圧の変更形態を示す図
【図５】第２実施形態における目標室圧の変更形態を示す図
【図６】第３実施形態を示すシステム構成図
【符号の説明】
１ａ，１ｂ 対象室
ｐａ，ｐｂ 室圧
４ 給気風路
７ 排気風路
Ｖａ，Ｖｂ 室圧調整用ダンパ
ｐｐａ，ｐｐｂ 目標室圧
９ａ，９ｂ 室圧制御手段
１２ 扉
１４ａ 開閉検出手段
１５，１６ａ 室圧保全手段
ｐｐｍ 設定中間値[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a room pressure control system used in a clean room facility or the like, and more specifically, opens a room pressure adjustment damper interposed in a supply air passage or an exhaust air passage for each target room based on a detected room pressure of each target room. The present invention relates to a room pressure control system including room pressure control means for adjusting a room pressure of each target room to each target room pressure by adjusting a degree.
[0002]
[Prior art]
Conventionally, in this type of room pressure control system, the target room pressure is changed as an initial setting when the purpose of the target room is changed, or the target pressure is gradually increased at the start of the supply / exhaust operation. Except for gradually changing the room pressure, the target room pressure of each target room is not changed.During a steady supply / exhaust operation, the target room pressure of each target room is fixed and the room pressure control means is not changed. Is controlled for each target room.
[0003]
[Problems to be solved by the invention]
However, in the conventional system, when there is a door between target chambers having different target chamber pressures, when the door is opened, the room pressures of the target rooms in the room pressure control state are equalized by the communication. When the door is closed, the room pressure changes temporarily but in a direction opposite to the direction in which the door was opened, but temporarily, when the door is closed. There is a phenomenon that greatly deviates from the room pressure.
[0004]
Of these room pressure changes, the temporary room pressure change when the door is closed is extremely large compared to the room pressure change when the door is opened. Therefore, the room pressure control for maintaining cleanliness of the clean room is performed. In the case of, in the room pressure control performed for various purposes, such as the reliability of maintaining the cleanliness greatly reduced, the reliability of achieving the intended purpose depends on the extreme room pressure change when the door is closed. There was a problem that it greatly reduced.
[0005]
The extreme change in room pressure when the door is closed is due to the control of the room pressure after the door is opened. The opening degree of the chamber pressure adjusting damper of the supply air path or the exhaust air path for each target chamber is adjusted in the direction of returning the chamber pressures of the two target chambers in the communicating state to the respective target chamber pressures, but the door opens. While in the state, the leaking air volume entering from one target chamber to the other target chamber only increases due to communication between the two chambers by opening the door, and the chamber pressure does not return to the target chamber pressure. Therefore, the damper for adjusting the room pressure is adjusted to the opening adjustment limit or to a state close to the opening adjustment limit, and the relationship between the air supply amount and the exhaust amount in the target room is different from that before the door was opened. It will be completely different. Then, in such a state where the relationship between the supply and exhaust air amounts is largely out of order, since the door is closed, the above-described extreme change in the chamber pressure occurs.
[0006]
In addition, when the room volume and the number of ventilations in one of the target rooms are sufficiently larger than those in the other target room, the room pressure change due to the equalization when the door is opened is an extreme room pressure change when the door is closed. , Since it occurs more in the target room on the other side, an extreme change in the chamber pressure when the door is closed also significantly occurs in the target room on the other side. If they are the same, the room pressure change due to pressure equalization when the door is opened occurs equally (the direction of change is opposite) in both target rooms, so the extreme room pressure change when the door is closed is also applied to both subjects. It occurs equally in the room (again, the direction of change is opposite).
[0007]
In view of the above situation, the main problem of the present invention is that the room pressure control mode according to the opening and closing of the door is rationally switched, so that the room pressure at the time of closing the door regardless of the room pressure control while the door is open. The point is that extreme changes in pressure can be effectively suppressed.
[0008]
[Means for Solving the Problems]
[Invention of claim 1]
According to the first aspect of the present invention, when the door is opened, one or both of the target chamber pressures of the two target chambers that are in communication with each other when the door is opened are changed to change the two target chambers. By making the target chamber pressures of the target chambers equal to each other, the chamber pressures of these target chambers deviate from the original target chamber pressures by equalizing when the doors are opened. The room pressure control means detects room pressure adjusting dampers for each of the target chambers in such a manner that the chambers are treated as one room pressure control chamber having two target chamber pressures (that is, the above-mentioned matched target chamber pressures). The opening is adjusted based on the room pressure, so that after the door is opened, the room pressures of the two target rooms are both adjusted to the above-mentioned target room pressure that has been matched.
[0009]
In other words, this causes a problem in damper adjustment that has occurred in the above-described conventional system, that is, the two chambers communicate with each other when the door is opened, and the chamber pressures of the target chambers are set to different target chamber pressures from each other. Even though it is no longer possible to adjust the room pressure, the room pressure adjustment damper is meaninglessly adjusted to the target room pressure of each different room even after the door is opened. It is possible to prevent the damper for use from reaching the opening adjustment limit or a state close thereto.
[0010]
On the other hand, while the door is in the open state, the room pressure control that treats both target rooms as substantially one room maintains the room pressures of both target rooms at the same target room pressure, and then the door is closed. Then, by returning the target chamber pressure changed when the door was opened earlier to the original value, these target chambers are treated again as individual chamber pressure control target chambers having different target chamber pressures from each other. The opening degree of the chamber pressure adjusting damper for each of the chambers is adjusted based on the detected chamber pressure of each chamber by the chamber pressure control means, thereby adjusting the chamber pressures of the target chambers to their original target chamber pressures. Return to the state to do.
[0011]
That is, according to the first aspect of the present invention, it is possible to prevent the chamber pressure adjusting damper from reaching an opening adjustment limit or a state close to the opening adjustment limit by meaningless opening adjustment after the door is opened. It is possible to effectively suppress an extreme change in the room pressure when the door is closed, thereby improving the certainty of maintaining the cleanliness in the case of the room pressure control for the purpose of maintaining the cleanliness of the clean room. For example, in room pressure control performed for various purposes, the intended purpose can be more reliably achieved.
[0012]
As another method for suppressing an extreme change in the room pressure when the door is closed, when the door is opened, the opening adjustment of the room pressure adjusting damper by the room pressure control means is stopped, and the door is opened. During a certain time, the opening of the room pressure adjusting damper is fixed to the opening at the time of opening the door, and when the door is closed, the opening of the room pressure adjusting damper is adjusted by the room pressure controlling means. It is also possible to consider a method of restarting, so as to prevent the chamber pressure adjusting damper from being unnecessarily adjusted in opening after the door is opened to reach the opening adjustment limit or a state close thereto.
[0013]
However, in this alternative method, while the door is open, the opening degree of the room pressure adjusting damper is fixed and there is no function of adjusting the room pressure with respect to the target room. If there are any fluctuation factors related to the air supply / exhaust volume, such as the start of local exhaust or local air supply that is different from the air supply or exhaust air flow, the room pressure of the target room will fluctuate due to the effect. According to the first aspect of the present invention, while the door is in the open state, the chamber pressure of both the target chambers is adjusted to the same target chamber pressure while the door is open. Even if the local exhaust or the local air supply is started while the valve is in the open state, even if some variation factor occurs in the supply / exhaust amount relationship, the room pressure control function adjusts the room pressures of both the target rooms to the above-mentioned coincidence. It can be adjusted and maintained at the target room pressure. In keeping the Joteki becomes more excellent room pressure controlling system compared to alternative methods described above.
[0014]
[Invention of claim 2]
In the invention according to claim 2, when the door is opened, by changing the target chamber pressure, the target chamber pressures of the two target chambers are made to coincide with each other. While the target room pressure of one specific target room is fixed, only the target room pressure of the other target room is changed, and the target room pressure of these two target rooms is changed to one of the specific target rooms. At the target chamber pressure.
[0015]
By adopting this modification, even when the door is in the open state, the room pressure of one target room, which is the specific target room, is set to the communication between the two rooms by the room pressure control aiming at the coincident target room pressure. Regardless, the target chamber pressure is maintained at the original target chamber pressure, and then, when the door is closed, the target chamber pressure of the other target chamber, which was changed when the previous door was opened, is returned to the original value. When returning to the room pressure control state, the target room, which is the specific target room, hardly changes in room pressure, and the room pressure is maintained at the original target room pressure while maintaining the original room pressure. So that it can return to the pressure control state.
[0016]
In other words, according to the second aspect of the present invention, when there is a difference between the necessity and importance of maintaining the chamber pressures at the original target chamber pressures in the two target chambers, the necessity is maintained. -By adopting the above modified form with the target room with higher importance as the above-mentioned specific target room, the necessity-The room pressure of the target room with higher importance will be increased while the door is open. In addition, when the door is closed thereafter, the original target chamber pressure can be stably maintained, and in this regard, of the two target chambers that are in communication with each other when the door is opened, the cleanliness level is low. This is an effective chamber pressure control system especially when it is required to maintain the chamber pressure of one of the target chambers strictly at its original target chamber pressure for reasons such as strict maintenance.
[0017]
[Invention of claim 3]
According to the third aspect of the present invention, when the door is opened, the target chamber pressures of the two target chambers are brought into communication with each other by opening the door when the target chamber pressures of the two target chambers are matched by changing the target chamber pressure. Both the pressures are changed to a set intermediate value between these target chamber pressures, and the target chamber pressures of these two target chambers are made to match with the set intermediate value.
[0018]
By adopting this modification, the target room pressure of one of the two target rooms is fixed, and only the target room pressure of the other target room is changed. Compared to a configuration in which the chamber pressures are matched, the difference between the chamber pressure when the door is closed and the chamber pressure when the door is open can be reduced as much as possible for both of the two target rooms. To do.
[0019]
That is, according to the third aspect of the present invention, the difference between the room pressure when the door is in the closed state and the room pressure when the door is in the open state for both of the two target rooms is minimized. By being able to reduce, the room pressure control system is effective when it is required to keep the room pressures of the two target chambers as close as possible to the respective original target room pressures.
[0020]
[Invention of claim 4]
According to the fourth aspect of the present invention, when the door is opened, the target chamber pressures of the two target chambers that are brought into communication with each other by opening the door are both changed to an intermediate value between the target chamber pressures. In order to match the target room pressures of these two target rooms at the set intermediate value, the ratio of the tendency of the room pressure change tendency when the doors of the two target rooms are opened (that is, the room pressure of each room when the doors are opened) An intermediate value corresponding to an internal dividing point that internally divides between these two target chamber pressures is set as the set intermediate value.
[0021]
By adopting this modified form, the fact that the chamber pressure of each target chamber changes in the direction of equalization with the opening of the door itself is equivalent to the adjustment of the chamber pressure to the above-mentioned set intermediate value, which is the coincident target chamber pressure. The opening adjustment amount of the chamber pressure adjusting damper required to adjust the chamber pressure in both chambers to the set intermediate value in response to the opening of the door (in other words, the change in the air supply amount or exhaust amount) Volume) is small, so that the room pressure in both chambers can be quickly adjusted to the set intermediate value. This also makes it possible to return to the original room pressure control state with subsequent closing of the door. In a state where the opening adjustment amount of the pressure adjusting damper is small, the chamber pressures of both chambers can be promptly returned to their original target chamber pressures.
[0022]
That is, according to the fourth aspect of the present invention, as described above, when the door is opened and when the door is closed, the chamber pressures of the two chambers are matched with each other with the opening adjustment amount of the chamber pressure adjusting damper being small. Can be quickly adjusted to the set intermediate value, which is the target chamber pressure, and to the respective original target chamber pressures, thereby providing a more excellent room pressure control system in keeping the chamber pressure of the target chamber as stable as possible.
[0023]
[Invention according to claim 5]
According to the fifth aspect of the present invention, when the door is opened, the chamber pressure adjusting damper for one of the two target chambers that are in communication with each other when the door is opened is detected by detecting the one of the target chambers. From the independent adjustment state in which the opening degree is adjusted based on the room pressure (that is, the state in which the opening degree is adjusted aiming at the target chamber pressure of one of the target chambers), based on the detected chamber pressure of the room pressure adjusting damper for the other target room. The state is switched to the driven adjustment state in which the opening degree is changed by following the opening degree adjustment (that is, the damper opening degree aiming at the target chamber pressure of the other target chamber).
[0024]
In other words, by performing the switching to the driven adjustment state, the chamber pressures of both the target chambers deviate from the respective original target chamber pressures by equalization when the door is opened. In the form in which the changed target room is treated as one room pressure control target room having one target room pressure (specifically, the target room pressure of the other target room), the room pressure for the other target room is adjusted. The opening degree of the damper is adjusted based on the detected chamber pressure, and the opening degree of the chamber pressure adjusting damper for the one of the target chambers is changed by following the opening degree. The room pressure of the room is adjusted to the target room pressure of the other target room.
[0025]
Then, due to this, the problem of damper adjustment that has occurred in the above-described conventional system, that is, the two chambers are in communication with each other when the door is opened, and the chamber pressures of these target chambers are set to different target chamber pressures from each other. Even though it is no longer possible to adjust the room pressure, the room pressure adjustment damper is meaninglessly adjusted to the target room pressure of each different room even after the door is opened. It is possible to prevent the damper for use from reaching the opening adjustment limit or a state close thereto.
[0026]
On the other hand, while the door is in the open state, the room pressure of both the target chambers is set to the target of the other target room by the room pressure control in which the room pressure adjusting damper for one of the target rooms is switched to the driven adjustment state as described above. By maintaining the room pressure, and thereafter, when the door is closed, the room pressure adjustment damper, which has been switched to the driven adjustment state when the door was opened earlier, is returned to the independent adjustment state. In the form of treating as individual chamber pressure control target chambers having pressure, the chamber pressure adjustment dampers for each of these target chambers are adjusted by the chamber pressure control means based on the detected chamber pressure of each chamber, whereby the opening degree is adjusted. Then, the state returns to the state in which the chamber pressures of the target chambers are adjusted to their original target chamber pressures.
[0027]
In other words, according to the fifth aspect of the present invention, similarly to the first aspect of the present invention, after the door is opened, the chamber pressure adjusting damper is brought into a state close to or near the opening adjustment limit by meaningless opening adjustment. As a result, it is possible to effectively suppress an extreme change in room pressure when the door is closed due to this, and further achieve the intended purpose in the room pressure control performed for various purposes. Can be assured.
[0028]
Also in the alternative method described above, as in the first aspect of the invention, while the door is in the open state, the chamber pressure of both the target chambers is adjusted to the target chamber pressure of the other target chamber. Since the control is performed, even if any change factors occur in the air supply / exhaust volume relationship, such as when local exhaust or local air supply is started in the target room while the door is open, the room pressure control function will The room pressure of the target room can be adjusted and maintained at the target room pressure of the other target room. In this respect, in maintaining the room pressure of the target room as stable as possible, it is more excellent than the aforementioned alternative method. Room pressure control system.
[0029]
BEST MODE FOR CARRYING OUT THE INVENTION
[First Embodiment]
In FIG. 1, reference numerals 1 a to 1 c denote first to third target chambers whose room pressure is to be controlled, Fs denotes an air supply fan that supplies air-conditioning air SA to each of the target chambers 1 a to 1 c via the main air supply passage 2. Fe is an exhaust fan that exhausts the room air RA from each of the target chambers 1a to 1c through the main exhaust air path 3, and feeds air from the main air supply path 2 to a branch supply air path 4 connected to each of the target chambers 1a to 1c. Is provided with a constant air volume device 5 for maintaining the amount of air supplied to each of the target chambers 1a to 1c at each set amount, and a filter 6 for air supply.
[0030]
The branch exhaust air path 7 connected from the main exhaust air path 3 to each of the target chambers 1a to 1c respectively has an exhaust filter 8 and the chamber pressures pa to pa of each of the target chambers 1a to 1c by opening adjustment. Room pressure adjusting dampers Va to Vc for adjusting pc are interposed.
[0031]
Reference numerals 9a to 9c denote target chamber pressures ppa to ppc of each of the target chambers 1a to 1c specified from the control panel 10 and chamber pressures pa to pc of the respective target chambers 1a to 1c detected by the room pressure sensor 11. In accordance with deviations Δpa to Δpc from an appropriate reference pressure po such as the atmospheric pressure, the opening degrees of the chamber pressure adjusting dampers Va to Vc are adjusted to adjust the chamber pressures pa to of the target chambers 1a to 1c. This is a damper controller as room pressure control means for adjusting pc to each of the target chamber pressures ppa to ppc (for example, ppa = 30 [Pa], ppb = 20 [Pa], ppc = 0 [Pa]).
[0032]
L sends various commands from the control panel 10 to the damper controllers 9a to 9c, such as designation of the target chamber pressures ppa to ppc and commands to fully close and fully open the dampers Va to Vc, as well as to each of the target chambers 1a. This is a communication line for sending information from the damper controllers 9a to 9c to the control panel 10, such as the detection chamber pressures pa to pc and the opening degree of the chamber pressure adjusting dampers Va to Vc.
[0033]
The first door 12 between the first target room 1a and the second target room 1b, and the second door 13 between the second target room 1b and the third target room 1c, respectively, Door open / close detectors 14a and 14b are provided as open / close detecting means for detecting the opening / closing of these doors 12 and 13 and sending the detection result of the opening / closing to the control panel 10. On the other hand, the control panel 10 has The first and second doors 12 and 13 are opened once, and as door pressure maintenance means for preventing an extreme change in the room pressure when the doors 12 and 13 are closed again, the doors 12 and 13 by door open / close detectors 14a and 14b are used. A target chamber pressure automatic changing unit 15 is provided for automatically changing the target chamber pressures ppa to ppc of the corresponding room when the door is opened or closed based on the open / close detection of the target.
[0034]
The target chamber pressure automatic changing unit 15 is configured to execute the automatic change of the target chamber pressure as described in the following (A) and (B).
[0035]
(A) For the first target room 1a and the second target room 1b, the necessity and importance of maintaining the room pressures pa and pb at the target room pressures ppa and ppb, respectively, due to their room use. Since the first target room 1a is higher than the second target room 1b, the first target room 1a is used as the main target room and the second target room 1b is used as the sub target room when the first door 12 is opened. Treat as
[0036]
Then, under the main-sub relationship, when the first door 12 is opened (see FIG. 2), the target chamber pressure ppa (= 30 Pa) of the first target chamber 1a which is the main target chamber is fixed, The target chamber pressure ppb (= 20 Pa) of the second target chamber 1b, which is the sub target chamber, is changed to a value equal to the target chamber pressure ppa of the first target chamber 1a (ppb = 20Pa → 30 Pa), and these first target chambers 1a are changed. And the target chamber pressure ppb of the second target chamber 1b.
[0037]
After that, when the first door 12 is closed (see FIG. 2), the target chamber pressure ppb of the second target chamber 1b which is the sub target chamber changed when the first door 12 is opened is set to the original value. (Ppb = 30 Pa → 20 Pa).
[0038]
(B) Regarding the second target room 1b and the third target room 1c, the necessity and importance of maintaining the room pressures pb and pc at the respective target room pressures ppb and ppc are considered due to their use. Since the third target room 1c is higher than the second target room 1b, the third target room 1c is used as the main target room and the second target room 1b is used as the sub target room when the second door 13 is opened. Treat as
[0039]
When the second door 13 is opened under the main-sub relationship (see FIG. 3), the target chamber pressure ppc (= 0 Pa) of the third target chamber 1c, which is the main target chamber, is fixed. The target chamber pressure ppb (= 20 Pa) of the second target chamber 1b, which is the sub target chamber, is changed to a value equal to the target chamber pressure ppc of the third target chamber 1c (ppb = 20 Pa → 0 Pa), and these second target chambers 1b The target chamber pressure ppb of the third target chamber 1c is made to coincide with the target chamber pressure ppb of the third target chamber 1c.
[0040]
After that, when the second door 13 is closed (see FIG. 3), the target chamber pressure ppb of the second target chamber 1b, which is the sub target chamber changed when the second door 13 is opened, is set to the original value. (Ppb = 0 Pa → 20 Pa).
[0041]
That is, the target chamber pressure is changed when the doors 12 and 13 are opened as described in (a) and (b) above, and the target chamber pressures of the two target chambers that are in communication with each other when the doors 12 and 13 are opened are matched. By doing so, the room pressure adjusting dampers Va, Vb, and Vc do not reach the opening adjustment limit or close to the opening adjustment limit for the opening adjustment aiming at different target chamber pressures while the doors 12 and 13 are open. It is prevented from being adjusted to a meaning, thereby preventing an extreme change in the chamber pressure when the door is closed due to the meaningless adjustment of the opening.
[0042]
[Second embodiment]
In the second embodiment, in the same supply / exhaust configuration as in the first embodiment described above, the target chamber pressure automatic changing unit 15 as the chamber pressure maintenance means is provided with the target chamber pressure as described in (A) and (B) above. Instead of performing the automatic change of the target room pressure, the target room pressure is automatically changed as described in the following (c) and (d) while the ventilation conditions of the target rooms 1a to 1c are as follows. .
[0043]

[0044]
(C) As for the first target room 1a and the second target room 1b, the ratio Δpa: ΔPb of the room pressure change tendency of the two rooms when the first door 12 is opened is approximately Is given by the inverse ratio Db × nb: Da × na of the product of the room volume and the number of times of ventilation, and the target chamber pressures ppa and ppb of the two chambers are determined by this inverse ratio (that is, the ratio of the tendency of the room pressure change). The following intermediate value ppm corresponding to the internal dividing point that internally divides the interval between the above is set as the set intermediate value of the change target in the target room pressure change.
ppm = X / Y
Here, X = Da × na × ppa + Db × nb × ppb
Y = Da × na + Db × nb
[0045]
Under this setting, when the first door 12 is opened (see FIG. 4), the target chamber pressures ppa (= 30 Pa) and ppb (= 20 Pa) of the first target chamber 1a and the second target chamber 1b are set. In both cases, the target room pressure ppa of the first target room 1a and the second room pressure are changed to the above set intermediate value ppm (= 28.8 Pa) (ppa = 30 Pa → 28.8 Pa, ppb = 20 Pa → 28.8 Pa). The target chamber pressure ppb of the target chamber 1b is matched.
[0046]
After that, when the first door 12 is closed (see FIG. 4), the target chamber pressures ppa and ppb of the two target chambers 1a and 1b changed when the first door 12 is opened are returned to the original values. (Ppa = 28.8 Pa → 30 Pa, ppb = 28.8 Pa → 20 Pa).
[0047]
(D) For the second target room 1b and the third target room 1c, the ratio Δpb: Δpc of the tendency of the room pressure change tendency between the two rooms when the second door 13 is opened is approximately the same as described above. Is given by the inverse ratio Dc × nc: Db × nb of the product of the volume of the chamber and the number of ventilations in both chambers, so that the target chamber pressures ppb, ppc of the two chambers are calculated by this inverse ratio (ratio of the tendency of the chamber pressure change). The following intermediate value ppn corresponding to an internal dividing point that internally divides between the two is set as a set intermediate value of the change target in the target chamber pressure change.
ppn = X '/ Y'
Here, X ′ = Db × nb × ppb + Dc × nc × ppc
Y = Db × nb + Dc × nc
[0048]
Under this setting, when the second door 13 is opened (see FIG. 5), the target chamber pressures ppb (= 20 Pa) and ppc (= 0 Pa) of the second target chamber 1b and the third target chamber 1c are set. In both cases, the target chamber pressure ppb of the second target chamber 1b and the third chamber pressure ppb are changed to the above-mentioned set intermediate value ppn (= 6.6 Pa) (ppb = 20 Pa → 6.6 Pa, ppc = 0 Pa → 6.6 Pa). The target chamber pressure ppc of the target chamber 1c is made to match.
[0049]
After that, when the second door 13 is closed (see FIG. 5), the target chamber pressures ppb and ppc of the target chambers 1b and 1c changed when the second door 13 is opened are returned to the original values. (Ppb = 6.6 Pa → 20 Pa, ppc = 6.6 Pa → 0 Pa).
[0050]
That is, the target chamber pressure is changed when the doors 12 and 13 are opened as described in (c) and (d), and the target chamber pressures of the two target chambers that are in communication with each other when the doors 12 and 13 are opened are equalized. Thus, similarly to the case of the first embodiment, the chamber pressure adjusting dampers Va, Vb, and Vc are used to adjust the opening degrees aiming at different target chamber pressures while the doors 12 and 13 are open. It is possible to prevent the meaningless adjustment to the opening adjustment limit or a state close to the opening adjustment limit, thereby preventing an extreme change in the room pressure when the door is closed due to the meaningless opening adjustment.
[0051]
[Third embodiment]
In the third embodiment, the first and second doors 12 and 13 are used as room pressure maintaining means for preventing an extreme change in room pressure when the door is once opened and then closed again. Instead of providing the target chamber pressure automatic changing section 15 as shown in the embodiment, as shown in FIG. 6, the damper controller 9a of the first target chamber 1a and the damper controller 9b of the second target chamber 1b are replaced with a second one. The first damper adjustment state switch 16a is provided, and the second damper adjustment state switch 16b is provided for the damper controller 9b of the second target chamber 1b and the damper controller 9c of the third target chamber 1c. I have.
[0052]
These damper adjustment state switches 16a, 16b are used to control the chamber pressure of one of the target chambers when the doors are opened or closed, based on the detection of the opening and closing of the doors 12, 13 by the door open / close detectors 14a, 14b. The opening degree adjustment mode for Va to Vc is switched. Specifically, the first damper adjustment state switch 16a switches the opening degree adjustment mode as described in (e) below, and further, the second damper adjustment state switching unit 16a switches the opening degree adjustment mode. The damper adjustment state switch 16b is configured to switch the degree of opening adjustment as described in (f) below.
[0053]
(E) Regarding the first target room 1a and the second target room 1b, it is necessary and important to maintain the room pressures pa and pb at the respective target room pressures ppa and ppb due to their room use. Since the first target room 1a is higher than the second target room 1b, the first target room 1a is used as the main target room and the second target room 1b is used as the sub target room when the first door 12 is opened. Treat as
[0054]
Under the main-sub relationship, when the first door 12 is opened, the chamber pressure adjusting damper Va of the first target chamber 1a, which is the main target chamber, changes the detection chamber pressure pa of the first target chamber 1a. The room pressure adjusting damper Vb of the second target chamber 1b, which is the sub target chamber, is moved to the second target while maintaining the independent adjustment state in which the opening is adjusted toward the target chamber pressure ppa of the first target chamber 1a based on The chamber pressure adjusting damper of the first target chamber 1a, which is the main target chamber, is changed from the independent adjustment state in which the opening is adjusted toward the target chamber pressure ppb of the second target chamber 1b based on the detected chamber pressure pb of the chamber 1b. The state is switched to a driven adjustment state in which the opening is changed by following the opening adjustment of Va.

[0055]
After that, when the first door 12 is closed, the chamber pressure adjustment damper Vb of the second target chamber 1b, which has been switched to the driven adjustment state when the first door 12 was opened, is moved from the driven adjustment state to the second adjustment state. Based on the detected chamber pressure pb of the target chamber 1b, the state is returned to the independent adjustment state in which the opening is adjusted toward the target chamber pressure ppb of the second target chamber 1b.

[0056]
(F) Regarding the second target room 1b and the third target room 1c, the necessity and importance of maintaining the room pressures pb and pc at the target room pressures ppb and ppc, respectively, due to their room use. Since the third target room 1c is higher than the second target room 1b, the third target room 1c is used as the main target room and the second target room 1b is used as the sub target room when the second door 13 is opened. Treat as
[0057]
Then, under the main-sub relationship, when the second door 13 is opened, the chamber pressure adjusting damper Vc of the third target room 1c, which is the main target room, causes the detection chamber pressure pc of the third target room 1c to be changed. The room pressure adjusting damper Vb of the second target chamber 1b, which is the sub target chamber, is moved to the second target while maintaining the independent adjustment state in which the opening is adjusted toward the target chamber pressure ppc of the third target chamber 1c based on The chamber pressure adjusting damper of the third target chamber 1c, which is the main target chamber, from the independent adjustment state in which the opening is adjusted toward the target chamber pressure ppb of the second target chamber 1b based on the detected chamber pressure pb of the chamber 1b. The state is switched to a driven adjustment state in which the opening is changed by following the opening adjustment of Vc.

[0058]
After that, when the second door 13 is closed, the chamber pressure adjusting damper Vb of the second target chamber 1b that has been switched to the driven adjustment state when the second door 13 was opened is moved from the driven adjustment state to the second adjustment state. Based on the detected chamber pressure pb of the target chamber 1b, the state is returned to the independent adjustment state in which the opening is adjusted toward the target chamber pressure ppb of the second target chamber 1b.

[0059]
That is, when the doors 12 and 13 are opened as described in (e) and (f) above, the damper Vb for adjusting the room pressure of one of the two target chambers, which is in the communicating state, is used for adjusting the chamber pressure of the other target chamber. By switching to a driven adjustment state in which the opening degree is changed by following the opening degree adjustment of the dampers Va and Vb, the chamber pressure is adjusted for the opening degree aiming at different target chamber pressures while the doors 12 and 13 are open. This prevents the adjustment dampers Va, Vb, and Vc from being meaninglessly adjusted to the opening adjustment limit or to a state close to the opening adjustment limit, whereby the extreme closing of the door due to the meaningless opening adjustment is prevented. Prevents room pressure changes.
[0060]
In addition, in the above-described driven adjustment state, a specific following method in which the opening degree of one chamber pressure adjusting damper Vb is changed by following the opening degree adjustment of the chamber pressure adjusting dampers Va and Vc of the other target chamber is described below. The room pressure adjusting damper Vb switched to the driven adjustment state is opened at the same rate as the opening degree of the chamber pressure adjusting dampers Va and Vc on the independent adjustment state maintaining side from the opening degree at the time of the switching. Or a method of changing the opening degree of the chamber pressure adjustment damper Vb switched to the driven adjustment state so as to maintain the same opening degree as the chamber pressure adjustment dampers Va and Vc on the independent adjustment state maintaining side. And the like can be cited as an example.
[0061]
[Another embodiment]
Next, another embodiment of the invention will be listed.
When the door is opened, when only one of the target chamber pressures of the two target chambers that are in communication with each other when the door is opened is changed to adopt a method of matching the target chamber pressures of these target chambers, In the first embodiment, an example is shown in which the target chamber having the higher necessity and importance of maintaining the chamber pressure at the original target chamber pressure is set to the target chamber pressure fixed side. In the case where there is no difference in the characteristics and importance, for the purpose of minimizing the opening adjustment amount of the room pressure adjustment damper when opening and closing the door, the target room with the smaller tendency of the room pressure change when the door is opened May be set to the target chamber pressure fixed side.
[0062]
When the door is opened, both of the target chamber pressures of the two target chambers that are brought into communication by opening the door are changed to an intermediate value between the target chamber pressures, and the target chambers of the target chambers are changed. In the case of adopting the method of matching the pressures, in the above-described second embodiment, the ratio of the tendency of the room pressure change between the two chambers when the door is opened is set to the internal dividing point that internally separates the target chamber pressures of the two chambers. Although the corresponding intermediate value is set as the above-described set intermediate value, an intermediate value other than the intermediate value corresponding to the subdivision point may be set as the above-described set intermediate value instead.
[0063]
In addition, when the door is opened, both target chamber pressures of the two target chambers that are in communication with each other when the door is opened are changed to match the target chamber pressures of these target chambers. The target chamber pressures of the two target chambers may be made to coincide with each other by a value deviating from between the target chamber pressures of the target chambers.
[0064]
In the first and second embodiments, the control panel 10 is equipped with the target room pressure automatic change unit 15 as a room pressure maintenance means for changing the target room pressure when the door is opened. However, the target chamber pressure automatic changing unit 15 may be configured as a single unit different from the control panel 10.
[0065]
In the third embodiment described above, the damper adjustment state switches 16a and 16b as room pressure maintenance means for switching to the driven adjustment state when the door is opened are provided as a single unit separate from the control panel 10. However, the damper adjustment state switches 16a and 16b may be incorporated in the control panel 10 and provided.
[0066]
When the door is opened, of the two target chambers that are in communication with each other when the door is opened, the chamber pressure adjustment damper of one of the target chambers is changed from the independent adjustment state to the chamber pressure adjustment damper of the other target chamber. In the case of adopting a method of switching to a driven adjustment state in which the opening is changed by following the opening adjustment, in the third embodiment, the necessity and importance of maintaining the chamber pressure at the original target chamber pressure is lower. In the above example, the room pressure adjustment damper of the target room is set to the damper that switches to the driven adjustment state. For the purpose of minimizing the opening adjustment amount of the adjustment damper as much as possible, the room pressure adjustment damper of the target room having the larger tendency of changing the room pressure when the door is opened is used as the damper for switching to the driven adjustment state. You may do so.
[0067]
In each of the above-described embodiments, the type in which the room pressure adjusting damper is interposed in the exhaust air passage of each target room is shown. However, the present invention provides that the room pressure adjusting damper is installed in the supply air passage of each target room. The present invention can also be applied to a type in which a damper for adjusting the room pressure is interposed in both the supply air path and the exhaust air path of each target room.
[0068]
As the opening / closing detecting means for detecting the opening / closing of the door, various types such as a mechanical limit switch, a system for detecting the opening / closing of the door by utilizing an optical system, or a system for detecting the opening / closing by utilizing a magnetic field can be adopted.
[0069]
The target room is not limited to a clean room, but may be of any use.
[0070]
In the case where the first door 12 and the second door 13 are both opened in some cases, the present invention is applied to two rooms corresponding to the previously opened door, and these two rooms are separated. The above-described room pressure control which is substantially treated as one room is performed, and then, with respect to the opening of the door, the two rooms treated as substantially one room and the other room are further subjected to the present invention. As a result, with respect to the opening of both doors 12 and 13, two or all of the target chamber pressures of the three target chambers that are in communication with each other by opening these doors 12 and 13 By changing the target chamber pressures of these three target chambers, or by opening the doors 12 and 13, two of the three target chambers that communicate with each other when the doors 12 and 13 open are changed. The room pressure adjustment damper for the target room is changed from the independent adjustment state to the room pressure adjustment for the other third target room. By following the damper may be so switched to the driven adjustment state to opening change.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram showing first and second embodiments.
FIG. 2 is a diagram showing a change mode of a target chamber pressure in the first embodiment.
FIG. 3 is a diagram showing a change mode of a target chamber pressure in the first embodiment.
FIG. 4 is a diagram showing a change mode of a target chamber pressure in a second embodiment.
FIG. 5 is a diagram showing a change mode of a target chamber pressure in a second embodiment.
FIG. 6 is a system configuration diagram showing a third embodiment.
[Explanation of symbols]
1a, 1b Target room
pa, pb Room pressure
4 Supply air path
7 Exhaust air path
Va, Vb Room pressure adjustment damper
ppa, ppb Target chamber pressure
9a, 9b Room pressure control means
12 doors
14a Open / close detection means
15, 16a Room pressure maintenance means
ppm setting intermediate value

Claims (5)

Based on the detected chamber pressure of each target room, the opening degree of the room pressure adjusting damper interposed in the supply air passage or exhaust air passage for each target room is adjusted so that the room pressure of each target room becomes the target room pressure. A room pressure control system comprising room pressure control means for adjusting,
Opening and closing detection means for detecting the opening and closing of the door between the target chambers,
When the opening of the door is detected by the open / close detection means, one or both of the target chamber pressures of the two target chambers that are in communication with each other by opening the door are changed, and the two Match the target room pressure of the target room,
Further, a room pressure control system provided with a room pressure maintenance means for returning the target room pressure changed when the door was opened earlier to the original value before the change when the opening / closing detection means detects the closing of the door. The room pressure maintenance means, when the opening of the door is detected, of the two target chambers that are in communication with each other by opening the door, while the target chamber pressure of one specific target chamber is fixed, The room pressure control system according to claim 1, wherein only the target room pressure of the other target room is changed so that the target room pressures of the two target rooms are made to coincide with each other. When the opening of the door is detected, the chamber pressure maintaining means sets the target chamber pressures of the two target chambers that are in communication with each other by opening the door to a set intermediate value between the target chamber pressures. The room pressure control system according to claim 1, wherein the target room pressures of the two target chambers are changed to be the same. The ratio of the degree of change in the room pressure when the doors of the two target chambers that are in communication with each other when the doors are opened is equivalent to an internal dividing point that internally separates the target chamber pressures of the two target chambers. 4. The room pressure control system according to claim 3, wherein the intermediate value is set as the set intermediate value. Based on the detected chamber pressure of each target room, the opening degree of the room pressure adjusting damper interposed in the supply air passage or exhaust air passage for each target room is adjusted so that the room pressure of each target room becomes the target room pressure. A room pressure control system comprising room pressure control means for adjusting,
Opening and closing detection means for detecting the opening and closing of the door between the target chambers,
When the opening of the door is detected by the opening / closing detection means, the chamber pressure adjusting damper for one of the two target chambers, which is in communication with the opening of the door, is connected to one of the target chambers. Switching from an independent adjustment state in which the opening degree is adjusted based on the detection chamber pressure to a driven adjustment state in which the opening degree is changed by following the opening degree adjustment based on the detection chamber pressure of the room pressure adjustment damper for the other target chamber,
Further, when the closing is detected by the opening / closing detecting means, a chamber pressure maintaining means for returning the chamber pressure adjusting damper, which has been switched to the driven adjustment state when the door was opened, to the independent adjustment state before switching, is provided. Room pressure control system.

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