JP2010223540A

JP2010223540A - Air volume control system and air volume control method

Info

Publication number: JP2010223540A
Application number: JP2009073473A
Authority: JP
Inventors: Yasuhito Omagari; 康仁大曲; Masahiko Matsuba; 匡彦松葉; Hiroshi Tojima; 浩史東島
Original assignee: Azbil Corp
Current assignee: Azbil Corp
Priority date: 2009-03-25
Filing date: 2009-03-25
Publication date: 2010-10-07

Abstract

【課題】開度センサを有さない風量制御装置を用いた風量制御システムにおいて、風量不足の解消と省エネルギーとの両立を図る。
【解決手段】ベンチュリ型ＶＡＶ１０−１〜１０−ｎの前後の差圧ΔＰ１〜ΔＰｎを計測する差圧センサＳ１〜Ｓｎを設ける。制御装置１５において、差圧ΔＰ１〜ΔＰｎを監視し、１つでも下限値ΔＰＬｔｈ以下の差圧があった場合、風量不足であるとみなして、調和空気の流れる給気ダクト４内の静圧を増加させる。差圧ΔＰ１〜ΔＰｎに下限値ΔＰＬｔｈ以下の差圧がなく、１つでも上限値ΔＰＨｔｈ以上の差圧があった場合、風量もしくは静圧過剰であるとみなして、給気ダクト４内の静圧を減少させる。
【選択図】図１In an air volume control system using an air volume control device that does not have an opening sensor, it is possible to achieve both the elimination of air volume shortage and energy saving.
Differential pressure sensors S1 to Sn for measuring differential pressures ΔP1 to ΔPn before and after Venturi type VAVs 10-1 to 10-n are provided. In the control device 15, the differential pressures ΔP1 to ΔPn are monitored, and if any one of the differential pressures is less than or equal to the lower limit ΔPLth, it is considered that the air volume is insufficient, and the static pressure in the air supply duct 4 through which the conditioned air flows is reduced. increase. If the differential pressures ΔP1 to ΔPn do not have a differential pressure equal to or lower than the lower limit value ΔPLth, and there is even a differential pressure equal to or higher than the upper limit value ΔPHth, the air pressure or the static pressure in the air supply duct 4 is regarded as being excessive. Decrease.
[Selection] Figure 1

Description

この発明は、制御対象空間に通ずるダクトに設けられた風量制御装置（ＶＡＶ）を通過する風量を制御する風量制御システムおよび風量制御方法に関するものである。 The present invention relates to an air volume control system and an air volume control method for controlling an air volume passing through an air volume control device (VAV) provided in a duct communicating with a control target space.

〔開度センサを有する風量制御装置を用いた風量制御システム〕
従来より、この種の風量制御システムとして、図１０にその概略を示すような空調制御システムが用いられている（例えば、特許文献１参照）。同図において、１−１〜１−ｎは制御対象空間、２は給気ファン、３は排気ファン、４は給気ファン２からの制御対象空間１−１〜１−ｎへの調和空気の供給通路をなす給気ダクト、５は制御対象空間１−１〜１−ｎからの調和空気の排出通路をなす排気ダクト、Ｄ１〜Ｄｎは制御対象空間１−１〜１−ｎに通ずる主ダクト４から分岐して設けられたダクト、６−１〜６−ｎはダクトＤ１〜Ｄｎに設けられた開度センサを有する風量制御装置（ＶＡＶ）、７−１〜７−ｎは制御対象空間１−１〜１−ｎに設置された温度センサ、８−１〜８−ｎは風量制御装置６−１〜６−ｎの開度を制御するＶＡＶコントローラ、９は給気ファン２および排気ファン３の回転数を制御する制御装置である。 [Air flow control system using air flow control device with opening sensor]
Conventionally, an air conditioning control system whose outline is shown in FIG. 10 is used as this type of air volume control system (see, for example, Patent Document 1). In the same figure, 1-1 to 1-n are control target spaces, 2 is an air supply fan, 3 is an exhaust fan, 4 is the conditioned air from the air supply fan 2 to the control target spaces 1-1 to 1-n. An air supply duct that forms a supply passage, 5 is an exhaust duct that forms an exhaust passage for conditioned air from the control target spaces 1-1 to 1-n, and D1 to Dn are main ducts that communicate with the control target spaces 1-1 to 1-n. 4, ducts 6-1 to 6-n are branched from the air flow control device (VAV) having opening degree sensors provided in the ducts D1 to Dn, and 7-1 to 7-n are control target spaces 1. -1 to 1-n are temperature sensors, 8-1 to 8-n are VAV controllers for controlling the opening degree of the air volume control devices 6-1 to 6-n, and 9 is an air supply fan 2 and an exhaust fan 3 It is a control apparatus which controls the rotation speed of.

この風量制御システムにおいて、ＶＡＶコントローラ８−１は、制御対象空間１−１における温度センサ７−１からの室内温度ｔ１ｐｖを入力とし、この室内温度ｔ１ｐｖと設定温度ｔ１ｓｐとの偏差に基づいて制御対象空間１−１への要求風量Ｑ１を演算し、この演算した要求風量Ｑ１を確保するように風量制御装置６−１の開度θ１を制御すると共に、その演算した要求風量Ｑ１を制御装置９へ送る。 In this air volume control system, the VAV controller 8-1 receives the indoor temperature t1pv from the temperature sensor 7-1 in the control target space 1-1, and controls the control object based on the deviation between the indoor temperature t1pv and the set temperature t1sp. The required air volume Q1 to the space 1-1 is calculated, the opening degree θ1 of the air volume control device 6-1 is controlled so as to ensure the calculated required air volume Q1, and the calculated required air volume Q1 is supplied to the control device 9. send.

同様にして、ＶＡＶコントローラ８−ｎも、制御対象空間１−ｎにおける温度センサ７−ｎからの室内温度ｔｎｐｖを入力とし、この室内温度ｔｎｐｖと設定温度ｔｎｓｐとの差に基づいて制御対象空間１−ｎへの要求風量Ｑｎを演算し、この演算した要求風量Ｑｎを確保するように風量制御装置６−ｎの開度θｎを制御すると共に、その演算した要求風量Ｑｎを制御装置９へ送る。制御装置９は、ＶＡＶコントローラ８−１〜８−ｎからの要求風量Ｑ１〜Ｑｎの総和を求め、この要求風量の総和に基づいて給気ファン２の回転数を決定する。 Similarly, the VAV controller 8-n also receives the room temperature tnpv from the temperature sensor 7-n in the control target space 1-n, and controls the control target space 1 based on the difference between the room temperature tnpv and the set temperature tnsp. The required air volume Qn to -n is calculated, the opening degree θn of the air volume control device 6-n is controlled so as to ensure the calculated required air volume Qn, and the calculated required air volume Qn is sent to the control device 9. The control device 9 obtains the sum of the required air volumes Q1 to Qn from the VAV controllers 8-1 to 8-n, and determines the rotational speed of the air supply fan 2 based on the sum of the required air volumes.

また、制御装置９は、定期的に、ＶＡＶコントローラ８−１〜８−ｎを介して風量制御装置６−１〜６−ｎの開度θ１〜θｎを取り込み、１つでも全開のダンパがあれば、風量不足を風量制御装置の動作で解消不可能とみなして給気ファン２の回転数をアップする。すなわち、給気ファン２の回転数を調整するインバータ出力値をアップし、給気ダクト４への調和空気の供給量を増加させる。また、全開のダンパがなく、１つでも全閉に近いダンパがあれば、風量もしくは静圧過剰とみなして給気ファン２の回転数をダウンする。すなわち、給気ファン２の回転数を調整するインバータ出力値をダウンし、給気ダクト４内の静圧を減少させる。静圧減少により風量が減少しても、風量制御装置の動作により適切な風量が維持される。 Further, the control device 9 periodically takes in the opening degrees θ1 to θn of the air volume control devices 6-1 to 6-n via the VAV controllers 8-1 to 8-n, and has at least one fully open damper. For example, the shortage of the air volume is regarded as unresolvable by the operation of the air volume control device, and the rotation speed of the air supply fan 2 is increased. That is, the inverter output value for adjusting the rotation speed of the air supply fan 2 is increased, and the supply amount of conditioned air to the air supply duct 4 is increased. Further, if there is no fully open damper and at least one damper is almost fully closed, it is considered that the air volume or the static pressure is excessive, and the rotational speed of the air supply fan 2 is reduced. That is, the inverter output value for adjusting the rotation speed of the air supply fan 2 is reduced, and the static pressure in the air supply duct 4 is reduced. Even if the air volume decreases due to a decrease in static pressure, an appropriate air volume is maintained by the operation of the air volume control device.

〔開度センサを有さない風量制御装置を用いた風量制御システム〕
図１０に示した風量制御システムでは、風量制御装置として開度センサを有する風量制御装置を用いているが、開度センサを有さない風量制御装置を用いた風量制御システムもある。図１１にベンチュリ形の風量制御装置を用いた風量制御システムの概略を示す。同図において、１０−１〜１０−ｎはベンチュリ形の風量制御装置（以下、ベンチュリ型ＶＡＶと呼ぶ）、１１−１〜１１−ｎはベンチュリ型ＶＡＶ１０−１〜１０−ｎに付設されたＶＡＶコントローラである。 [Air flow control system using air flow control device without opening sensor]
In the air volume control system shown in FIG. 10, an air volume control apparatus having an opening sensor is used as the air volume control apparatus, but there is also an air volume control system using an air volume control apparatus that does not have an opening sensor. FIG. 11 shows an outline of an air volume control system using a venturi type air volume controller. In the figure, 10-1 to 10-n are venturi-type air volume control devices (hereinafter referred to as venturi-type VAVs), and 11-1 to 11-n are VAVs attached to the venturi-type VAVs 10-1 to 10-n. It is a controller.

図１２にベンチュリ型ＶＡＶ１０（１０−１〜１０−ｎ）の要部の機構を示す（例えば、非特許文献１，２参照）。ベンチュリ型ＶＡＶ１０は、ベンチュリ管（弁座）１０Ａ内にスプリングと一体構造のコーン（弁栓）１０Ｂを備えており、コーン１０Ｂが取り付けられたシャフト（弁軸）１０Ｄの摺動位置をレバー１０Ｃによって調整することができる。 FIG. 12 shows a mechanism of a main part of the Venturi type VAV10 (10-1 to 10-n) (for example, see Non-Patent Documents 1 and 2). The Venturi type VAV10 includes a cone (valve plug) 10B integrated with a spring in a Venturi tube (valve seat) 10A, and a sliding position of a shaft (valve shaft) 10D to which the cone 10B is attached is moved by a lever 10C. Can be adjusted.

このベンチュリ型ＶＡＶ１０では、レバー１０Ｃによってシャフト１０Ｄを図示右方向へ動かすと、ベンチュリ管１０Ａとコーン１０Ｂとの間の流路が狭くなり、流路の抵抗が大きくなり、通過する空気量が減少する。レバー１０Ｃによってシャフト１０Ｄを図示左方向へ動かすと、ベンチュリ管１０Ａとコーン１０Ｂとの間の流路が広くなり、流路の抵抗が小さくなり、通過する空気量が増大する。また、コーン１０Ｂの位置がベンチュリ管１０Ａの前後の差圧とスプリングのばね力の差で移動することによって、レバー１０Ｃのある位置（シャフト１０Ｄの摺動位置）に対して、ベンチュリ型ＶＡＶ１０を通過する空気量が一定の範囲に維持される。 In this Venturi type VAV10, when the shaft 10D is moved rightward in the figure by the lever 10C, the flow path between the Venturi tube 10A and the cone 10B becomes narrow, the resistance of the flow path increases, and the amount of air passing therethrough decreases. . When the shaft 10D is moved to the left in the figure by the lever 10C, the flow path between the venturi tube 10A and the cone 10B becomes wider, the flow path resistance decreases, and the amount of air passing therethrough increases. Further, the position of the cone 10B moves by the difference between the pressure difference between the front and rear of the venturi tube 10A and the spring force of the spring, so that the position of the lever 10C (the sliding position of the shaft 10D) passes through the venturi type VAV10. The amount of air to be maintained is maintained within a certain range.

図１１に示した風量制御システムにおいて、ＶＡＶコントローラ１１−１は、制御対象空間１−１における温度センサ７−１からの室内温度ｔ１ｐｖを入力とし、この室内温度ｔ１ｐｖと設定温度ｔ１ｓｐとの偏差に基づいて制御対象空間１−１への要求風量Ｑ１を演算し、この演算した要求風量Ｑ１を確保するようにベンチュリ型ＶＡＶ１０−１のシャフト１０Ｄの摺動位置を制御すると共に、その演算した要求風量Ｑ１を制御装置１２へ送る。 In the air volume control system shown in FIG. 11, the VAV controller 11-1 receives the indoor temperature t1pv from the temperature sensor 7-1 in the control target space 1-1, and takes the deviation between the indoor temperature t1pv and the set temperature t1sp. Based on the calculated required air volume Q1 to the control target space 1-1, the sliding position of the shaft 10D of the venturi-type VAV 10-1 is controlled so as to secure the calculated required air volume Q1, and the calculated required air volume. Q1 is sent to the control device 12.

同様にして、ＶＡＶコントローラ１１−ｎも、制御対象空間１−ｎにおける温度センサ７−ｎからの室内温度ｔｎｐｖを入力とし、この室内温度ｔｎｐｖと設定温度ｔｎｓｐとの差に基づいて制御対象空間１−ｎへの要求風量Ｑｎを演算し、この演算した要求風量Ｑｎを確保するようにベンチュリ型ＶＡＶ１０−１のシャフト１０Ｄの摺動位置を制御すると共に、その演算した要求風量Ｑｎを制御装置１２へ送る。制御装置１２は、ＶＡＶコントローラ１１−１〜１１−ｎからの要求風量Ｑ１〜Ｑｎの総和を求め、この要求風量の総和に基づいて給気ファン２の回転数を決定する。 Similarly, the VAV controller 11-n also receives the indoor temperature tnpv from the temperature sensor 7-n in the control target space 1-n, and controls the control target space 1 based on the difference between the indoor temperature tnpv and the set temperature tnsp. The required air volume Qn to -n is calculated, the sliding position of the shaft 10D of the venturi-type VAV 10-1 is controlled so as to secure the calculated required air volume Qn, and the calculated required air volume Qn is sent to the control device 12. send. The control device 12 obtains the sum of the required air volumes Q1 to Qn from the VAV controllers 11-1 to 11-n, and determines the rotational speed of the air supply fan 2 based on the sum of the required air volumes.

特開平１０−２６３８２号公報JP-A-10-26382

「クリティカル風量制御システム」、〔平成２１年１月１３日検索〕、インターネット＜http://jp.yamatake.com/product/ba/doc/specsheet/AI-5942-R4.0.pdf#search='風量制御バルブクリティカル'＞“Critical Air Volume Control System”, [searched on January 13, 2009], Internet <http://jp.yamatake.com/product/ba/doc/specsheet/AI-5942-R4.0.pdf#search= 'Airflow control valve critical'> 「研究施設向け環境制御システム」、〔平成２１年１月１３日検索〕、インターネット＜http://jp.yamatake.com/product/ba/critical/product/index.html＞“Environmental Control System for Research Facilities” [searched on January 13, 2009], Internet <http://jp.yamatake.com/product/ba/critical/product/index.html>

図１０に示した風量制御システムでは、制御装置９において、定期的に、ＶＡＶコントローラ８−１〜８−ｎを介して風量制御装置６−１〜６−ｎの開度θ１〜θｎを取り込み、１つでも全開のダンパがあれば、風量不足を風量制御装置の動作で解消不可能とみなして給気ファン２の回転数をアップするようにしている。また、全開のダンパがなく、１つでも全閉に近いダンパがあれば、風量もしくは静圧過剰とみなして給気ファン２の回転数をダウンするようにしている。これにより、この風量制御システムでは、制御対象空間１−１〜１−ｎにおける負荷状況に応じて給気ダクト４内の静圧変更を適切に行い、風量不足の解消と省エネルギーとの両立を図ることができる。 In the air volume control system shown in FIG. 10, the controller 9 periodically takes in the openings θ1 to θn of the air volume controllers 6-1 to 6-n via the VAV controllers 8-1 to 8-n, If there is even one fully opened damper, it is assumed that the air flow shortage cannot be resolved by the operation of the air flow control device, and the rotation speed of the air supply fan 2 is increased. Further, if there is no fully open damper and at least one damper is almost fully closed, it is assumed that the air volume or the static pressure is excessive, and the rotational speed of the air supply fan 2 is reduced. Thereby, in this air volume control system, the static pressure in the air supply duct 4 is appropriately changed according to the load conditions in the control target spaces 1-1 to 1-n, and both the elimination of the air volume shortage and the energy saving are achieved. be able to.

しかしながら、図１１に示した風量制御システムでは、ベンチュリ型ＶＡＶ１０の構成上、コーン１０Ｂの位置の検出が難しく、ベンチュリ型ＶＡＶ１０−１〜１０−ｎからその装置の開度θ１〜θｎを示す信号を得ることができない。このため、制御装置１２において、制御装置９で採用されていた制御アルゴリズムを利用することができず、風量不足が生じたり、無駄なエネルギーを消費してしまう虞があった。 However, in the air volume control system shown in FIG. 11, it is difficult to detect the position of the cone 10B due to the configuration of the Venturi type VAV10, and signals indicating the opening degrees θ1 to θn of the device are obtained from the Venturi type VAV10-1 to 10-n. Can't get. For this reason, in the control apparatus 12, the control algorithm employ | adopted by the control apparatus 9 cannot be utilized, but there existed a possibility that air volume might run short or useless energy might be consumed.

本発明は、このような課題を解決するためになされたもので、その目的とするところは、開度センサを有さない風量制御装置を用いた風量制御システムにおいて、風量不足の解消と省エネルギーとの両立を図ることが可能な風量制御システムおよび風量制御方法を提供することにある。 The present invention has been made in order to solve such a problem. The object of the present invention is to eliminate the shortage of air volume and save energy in an air volume control system using an air volume control device that does not have an opening sensor. It is an object to provide an air volume control system and an air volume control method capable of achieving both of the above.

このような目的を達成するために本発明は、第１〜第Ｎ（Ｎ≧２）の制御対象空間と、主ダクトから分岐して設けられた第１〜第Ｎの制御対象空間に通ずる第１〜第Ｎのダクトと、この第１〜第Ｎのダクトに各個に設けられた第１〜第Ｎの風量制御装置と、この第１〜第Ｎの風量制御装置を通過する風量を第１〜第Ｎの空調対象空間の負荷状況に応じて各個に制御する第１〜第Ｎの風量制御装置調節手段と、第１〜第Ｎの風量制御装置の前後の差圧を各個に計測する第１〜第Ｎの差圧計測手段と、この第１〜第Ｎの差圧計測手段によって計測された差圧の中から最小の差圧を抽出し、この抽出した差圧の最小値と予め定められている差圧の下限値とを比較し、差圧の最小値が下限値以下であった場合には主ダクト内の静圧を増加させる一方、差圧の最小値が下限値以下でなかった場合には、第１〜第Ｎの差圧計測手段によって計測された差圧の中から最大の差圧を抽出し、この抽出した差圧の最大値と予め定められている差圧の上限値と比較し、差圧の最大値が上限値以上であった場合には主ダクト内の静圧を減少させる主ダクト内静圧調整手段とを設けたものである。 In order to achieve such an object, the present invention provides a first to Nth (N ≧ 2) control target space and a first to Nth control target space provided by branching from the main duct. The first to Nth ducts, the first to Nth airflow control devices provided in each of the first to Nth ducts, and the airflow that passes through the first to Nth airflow control devices are the first. The first to Nth air volume control device adjusting means for controlling each unit according to the load condition of the Nth air conditioning target space and the first to Nth airflow control devices for measuring the differential pressure before and after each. A minimum differential pressure is extracted from the 1st to Nth differential pressure measuring means and the differential pressure measured by the 1st to Nth differential pressure measuring means, and the minimum value of the extracted differential pressure is determined in advance. Compared with the lower limit value of the differential pressure, if the minimum value of the differential pressure is less than the lower limit value, while increasing the static pressure in the main duct, If the minimum pressure value is not less than or equal to the lower limit value, the maximum differential pressure is extracted from the differential pressures measured by the first to Nth differential pressure measuring means, and the maximum differential pressure value is extracted. And a static pressure adjusting means in the main duct for reducing the static pressure in the main duct when the maximum value of the differential pressure is equal to or higher than the upper limit value. Is.

この発明によれば、第１〜第Ｎの風量制御装置の前後の差圧が各個に計測され、この計測された差圧ΔＰ１〜ΔＰｎの中から最小の差圧ΔＰｍｉｎが抽出され、この抽出された差圧の最小値ΔＰｍｉｎと予め定められている差圧の下限値ΔＰＬｔｈとが比較される。ここで、差圧の最小値ΔＰｍｉｎが下限値ΔＰＬｔｈ以下であった場合、主ダクト内の静圧が増加される。すなわち、本発明では、計測された差圧ΔＰ１〜ΔＰｎの内、１つでも下限値ΔＰＬｔｈ以下の差圧があった場合、風量不足であるとみなして、主ダクト内の静圧を増加させ、風量を増加させる。 According to the present invention, the differential pressure before and after the first to Nth air volume control devices is measured individually, and the minimum differential pressure ΔPmin is extracted from the measured differential pressures ΔP1 to ΔPn and extracted. The minimum value ΔPmin of the differential pressure is compared with a predetermined lower limit value ΔPLth of the differential pressure. Here, when the minimum value ΔPmin of the differential pressure is not more than the lower limit value ΔPLth, the static pressure in the main duct is increased. That is, in the present invention, if at least one of the measured differential pressures ΔP1 to ΔPn has a differential pressure equal to or lower than the lower limit ΔPLth, it is considered that the air volume is insufficient, and the static pressure in the main duct is increased. Increase air flow.

差圧の最小値ΔＰｍｉｎが下限値ΔＰＬｔｈ以下でなかった場合、計測された差圧ΔＰ１〜ΔＰｎの中から最大の差圧ΔＰｍａｘが抽出され、この抽出された差圧の最大値ΔＰｍａｘと予め定められている差圧の上限値ΔＰＨｔｈと比較し、差圧の最大値ΔＰｍａｘが上限値ΔＰＨｔｈ以上であった場合、主ダクト内の静圧が減少される。すなわち、本発明では、計測された差圧ΔＰ１〜ΔＰｎに下限値ΔＰＬｔｈ以下の差圧がなく、１つでも上限値ΔＰＨｔｈ以上の差圧があった場合、風量もしくは静圧過剰であるとみなして、主ダクト内の静圧を減少させる。静圧減少により風量が減少しても、風量制御装置の動作により適切な風量が維持される。 When the minimum value ΔPmin of the differential pressure is not less than or equal to the lower limit value ΔPLth, the maximum differential pressure ΔPmax is extracted from the measured differential pressures ΔP1 to ΔPn, and the maximum value ΔPmax of the extracted differential pressure is predetermined. When the maximum value ΔPmax of the differential pressure is equal to or higher than the upper limit value ΔPHth compared to the upper limit value ΔPHth of the differential pressure, the static pressure in the main duct is reduced. In other words, in the present invention, when the measured differential pressures ΔP1 to ΔPn do not have a differential pressure equal to or lower than the lower limit value ΔPLth, and even one differential pressure equal to or higher than the upper limit value ΔPHth, it is considered that the air volume or the static pressure is excessive. Reduce the static pressure in the main duct. Even if the air volume decreases due to a decrease in static pressure, an appropriate air volume is maintained by the operation of the air volume control device.

本発明において、主ダクト内の静圧の調整は、主ダクト内の静圧の設定値や主ダクトに対して設けられているファンの回転数を調整するインバータ出力値を調整することによって行うことが可能である。この場合、静圧の設定値をアップすることによって主ダクト内の静圧を増加させ、静圧の設定値をダウンすることによって主ダクト内の静圧を減少させる。また、インバータ出力値をアップすることによって主ダクト内の静圧を増加させ、インバータ出力値をダウンすることによって主ダクト内の静圧を減少させる。 In the present invention, the adjustment of the static pressure in the main duct is performed by adjusting the set value of the static pressure in the main duct and the inverter output value for adjusting the rotational speed of the fan provided for the main duct. Is possible. In this case, the static pressure in the main duct is increased by increasing the set value of the static pressure, and the static pressure in the main duct is decreased by decreasing the set value of the static pressure. Further, the static pressure in the main duct is increased by increasing the inverter output value, and the static pressure in the main duct is decreased by decreasing the inverter output value.

また、本発明において、主ダクトは、第１〜第Ｎの制御対象空間への調和空気の供給通路をなす給気ダクトとしてもよいし、第１〜第Ｎの制御対象空間からの調和空気の排出通路をなす排気ダクトとしてもよい。主ダクトを給気ダクトとする場合、第１〜第Ｎの風量制御手段は、第１〜第Ｎの風量制御装置を通過する第１〜第Ｎの空調対象空間への調和空気の風量を負荷状況（例えば、室内温度）に応じて制御する。また、主ダクト内静圧調整手段は、給気ダクト内の静圧を増減する。主ダクトを排気ダクトとする場合、第１〜第Ｎの風量制御装置調整手段は、第１〜第Ｎの風量制御装置を通過する第１〜第Ｎの空調対象空間からの調和空気の風量を負荷状況（例えば、室圧）に応じて制御する。また、主ダクト内静圧調整手段は、排気ダクト内の静圧を増減する。なお、本発明は、風量制御方法として実現することも可能である。 Moreover, in this invention, a main duct is good also as an air supply duct which makes the supply path of the conditioned air to the 1st-Nth control object space, and the conditioned air from the 1st-Nth control object space is good. It is good also as an exhaust duct which makes a discharge passage. When the main duct is an air supply duct, the first to Nth air volume control means load the conditioned air volume to the first to Nth air-conditioning target spaces passing through the first to Nth air volume control devices. Control according to the situation (for example, room temperature). The main duct static pressure adjusting means increases or decreases the static pressure in the air supply duct. When the main duct is the exhaust duct, the first to Nth air volume control device adjusting means calculates the air volume of the conditioned air from the first to Nth air conditioning target spaces passing through the first to Nth air volume control devices. Control is performed according to load conditions (for example, room pressure). The main duct static pressure adjusting means increases or decreases the static pressure in the exhaust duct. The present invention can also be realized as an air volume control method.

本発明によれば、第１〜第Ｎの風量制御装置の前後の差圧を各個に計測し、この計測された差圧の中から最小の差圧を抽出し、この抽出した差圧の最小値と予め定められている差圧の下限値とを比較し、差圧の最小値が下限値以下であった場合には主ダクト内の静圧を増加させる一方、差圧の最小値が下限値以下でなかった場合には、第１〜第Ｎの差圧計測手段によって計測された差圧の中から最大の差圧を抽出し、この抽出した差圧の最大値と予め定められている差圧の上限値と比較し、差圧の最大値が上限値以上であった場合には主ダクト内の静圧を減少させるようにしたので、開度センサを有さない風量制御装置を用いた風量制御システムにおいて、風量不足の解消と省エネルギーとの両立を図ることが可能となる。 According to the present invention, the differential pressure before and after each of the first to Nth airflow control devices is measured individually, the minimum differential pressure is extracted from the measured differential pressure, and the minimum of the extracted differential pressure is measured. The value is compared with a predetermined lower limit of the differential pressure, and if the minimum value of the differential pressure is less than or equal to the lower limit, the static pressure in the main duct is increased, while the minimum value of the differential pressure is the lower limit. If not, the maximum differential pressure is extracted from the differential pressures measured by the first to Nth differential pressure measuring means, and the maximum value of the extracted differential pressure is predetermined. Compared with the upper limit value of the differential pressure, the static pressure in the main duct is reduced when the maximum value of the differential pressure is greater than or equal to the upper limit value. In the existing air volume control system, it is possible to achieve both the elimination of the air volume shortage and the energy saving.

本発明に係る風量制御システムの一実施の形態（実施の形態１）の概略を示す図である。It is a figure which shows the outline of one Embodiment (Embodiment 1) of the air volume control system which concerns on this invention. この実施の形態１の風量制御システムにおける制御装置が有する給気ダクト内静圧調整機能の方式１を説明するためのフローチャートである。It is a flowchart for demonstrating the system 1 of the static pressure adjustment function in an air supply duct which the control apparatus in the air volume control system of this Embodiment 1 has. この給気ダクト内静圧調整機能の方式１を採用した場合の制御装置の要部の機能ブロック図である。It is a functional block diagram of the principal part of the control apparatus at the time of employ | adopting the system 1 of this static pressure adjustment function in an air supply duct. この風量制御システムにおける制御装置が有する給気ダクト内静圧調整機能の方式２を説明するためのフローチャートである。It is a flowchart for demonstrating the system 2 of the static pressure adjustment function in an air supply duct which the control apparatus in this air volume control system has. この給気ダクト内静圧調整機能の方式２を採用した場合の制御装置の要部の機能ブロック図である。It is a functional block diagram of the principal part of the control apparatus at the time of employ | adopting the system 2 of this static pressure adjustment function in an air supply duct. 本発明に係る風量制御システムの他の実施の形態（実施の形態２）の概略を示す図である。It is a figure which shows the outline of other embodiment (Embodiment 2) of the air volume control system which concerns on this invention. この実施の形態２の風量制御システムにおける制御装置が有する給気ダクト内静圧調整機能を説明するためのフローチャートである。It is a flowchart for demonstrating the static pressure adjustment function in an air supply duct which the control apparatus in the air volume control system of this Embodiment 2 has. この実施の形態２の風量制御システムにおける制御装置の要部の機能ブロック図である。It is a functional block diagram of the principal part of the control apparatus in the air volume control system of this Embodiment 2. 排気系統にベンチュリ型ＶＡＶを設けた場合の風量制御システムの一例を示す図である。It is a figure which shows an example of the air volume control system at the time of providing a venturi type | mold VAV in an exhaust system. 開度センサを有する風量制御装置を用いた従来の風量制御システムの概略を示す図である。It is a figure which shows the outline of the conventional air volume control system using the air volume control apparatus which has an opening degree sensor. ベンチュリ形の風量制御装置を用いた風量制御システムの概略を示す図である。It is a figure which shows the outline of the air volume control system using the venturi type air volume control apparatus. ベンチュリ型ＶＡＶの要部を示す機構図である。It is a mechanism figure which shows the principal part of Venturi type VAV.

以下、本発明を図面に基づいて詳細に説明する。
〔実施の形態１〕
図１はこの発明に係る風量制御システムの一実施の形態（実施の形態１）の概略を示す図である。同図において、図１１と同一符号は図１１を参照して説明した構成要素と同一或いは同等構成要素を示し、その説明は省略する。 Hereinafter, the present invention will be described in detail with reference to the drawings.
[Embodiment 1]
FIG. 1 is a diagram showing an outline of an embodiment (Embodiment 1) of an air volume control system according to the present invention. In the figure, the same reference numerals as those in FIG. 11 denote the same or equivalent components as those described with reference to FIG.

この風量制御システムでは、ベンチュリ型ＶＡＶ１０−１〜１０−ｎに対して、このベンチュリ型ＶＡＶ１０−１〜１０−ｎの前後の差圧ΔＰ１〜ΔＰｎを計測する差圧センサＳ１〜Ｓｎを設けている。なお、この差圧センサＳ１〜Ｓｎは、ベンチュリ型ＶＡＶ１０−１〜１０−ｎに搭載するようにしてもよい。 In this air volume control system, differential pressure sensors S1 to Sn for measuring differential pressures ΔP1 to ΔPn before and after the venturi type VAVs 10-1 to 10-n are provided for the venturi type VAVs 10-1 to 10-n. . The differential pressure sensors S1 to Sn may be mounted on the Venturi type VAVs 10-1 to 10-n.

また、この風量制御システムでは、ベンチュリ型ＶＡＶ１０−１〜１０−ｎにＶＡＶコントローラ１３−１〜１３−ｎを付設し、差圧センサＳ１〜Ｓｎによって計測される差圧ΔＰ１〜ΔＰｎをＶＡＶコントローラ１３−１〜１３−ｎへ送るようにしている。また、給気ダクト４内の静圧を検出する静圧センサ１４を設け、この静圧センサ１４が検出する静圧ＰＤｐｖを制御装置１５へ送るようにしている。 Further, in this air volume control system, VAV controllers 13-1 to 13-n are attached to the venturi type VAVs 10-1 to 10-n, and the differential pressures ΔP1 to ΔPn measured by the differential pressure sensors S1 to Sn are supplied to the VAV controller 13. -1 to 13-n. Further, a static pressure sensor 14 for detecting a static pressure in the air supply duct 4 is provided, and a static pressure PDpv detected by the static pressure sensor 14 is sent to the control device 15.

この風量制御システムにおいて、ＶＡＶコントローラ１３−１は、制御対象空間１−１における温度センサ７−１からの室内温度ｔ１ｐｖを入力とし、この室内温度ｔ１ｐｖと設定温度ｔ１ｓｐとの偏差に基づいて制御対象空間１−１への要求風量Ｑ１を演算し、この演算した要求風量Ｑ１を確保するようにベンチュリ型ＶＡＶ１０−１のシャフト１０Ｄ（図１２）の摺動位置を制御すると共に、その演算した要求風量Ｑ１を制御装置１５へ送る。 In this air volume control system, the VAV controller 13-1 receives the indoor temperature t1pv from the temperature sensor 7-1 in the control target space 1-1 and inputs a control target based on the deviation between the indoor temperature t1pv and the set temperature t1sp. The required air volume Q1 to the space 1-1 is calculated, the sliding position of the shaft 10D (FIG. 12) of the venturi-type VAV 10-1 is controlled so as to ensure the calculated required air volume Q1, and the calculated required air volume. Q1 is sent to the control device 15.

同様にして、ＶＡＶコントローラ１３−ｎも、制御対象空間１−ｎにおける温度センサ７−ｎからの室内温度ｔｎｐｖを入力とし、この室内温度ｔｎｐｖと設定温度ｔｎｓｐとの差に基づいて制御対象空間１−ｎへの要求風量Ｑｎを演算し、この演算した要求風量Ｑｎを確保するようにベンチュリ型ＶＡＶ１０−１のシャフト１０Ｄ（図１２）の摺動位置を制御すると共に、その演算した要求風量Ｑｎを制御装置１５へ送る。制御装置１５は、ＶＡＶコントローラ１３−１〜１３−ｎからの要求風量Ｑ１〜Ｑｎの総和を求め、この要求風量の総和に基づいて給気ファン２の回転数を決定する。 Similarly, the VAV controller 13-n also receives the room temperature tnpv from the temperature sensor 7-n in the control target space 1-n, and controls the control target space 1 based on the difference between the room temperature tnpv and the set temperature tnsp. The required air volume Qn to -n is calculated, the sliding position of the shaft 10D (FIG. 12) of the venturi-type VAV 10-1 is controlled so as to ensure the calculated required air volume Qn, and the calculated required air volume Qn is This is sent to the control device 15. The control device 15 obtains the sum of the required air volumes Q1 to Qn from the VAV controllers 13-1 to 13-n, and determines the rotation speed of the air supply fan 2 based on the sum of the required air volumes.

制御装置１５は、プロセッサや記憶装置からなるハードウェアと、これらのハードウェアと協働して制御装置としての各種機能を実現させるプログラムとによって実現され、本実施の形態特有の機能として、風量不足の解消と省エネルギー運転の両立を図るための給気ダクト内静圧調整機能を有している。以下、図２に示すフローチャートに従って、制御装置１５が有する給気ダクト内静圧調整機能の方式１について説明する。また、図４に示すフローチャートに従って、制御装置１５が有する給気ダクト内静圧調整機能の方式２について説明する。 The control device 15 is realized by hardware including a processor and a storage device, and a program that realizes various functions as the control device in cooperation with these hardware. As a function unique to the present embodiment, the air volume is insufficient. It has a function to adjust the static pressure in the air supply duct to achieve both the elimination of energy and energy saving operation. Hereinafter, the method 1 of the air duct internal static pressure adjusting function of the control device 15 will be described with reference to the flowchart shown in FIG. Further, the method 2 of the air duct internal static pressure adjustment function of the control device 15 will be described with reference to the flowchart shown in FIG.

〔給気ダクト内静圧調整機能：方式１〕
制御装置１５は、差圧センサＳ１〜Ｓ１によって計測されたベンチュリ型ＶＡＶ１０−１０−１〜１０−ｎの前後の差圧ΔＰ１〜ΔＰｎを取り込み（図２：ステップＳ１０１）、この計測された差圧ΔＰ１〜ΔＰｎの中から最小の差圧ΔＰｍｉｎを抽出する（ステップＳ１０２）。そして、この抽出した差圧の最小値ΔＰｍｉｎと予め定められている差圧の下限値ΔＰＬｔｈとを比較する（ステップＳ１０３）。 [Static pressure adjustment function in supply duct: Method 1]
The control device 15 takes in the differential pressures ΔP1 to ΔPn before and after the venturi-type VAVs 10-10-1 to 10-n measured by the differential pressure sensors S1 to S1 (FIG. 2: step S101), and this measured differential pressure. The minimum differential pressure ΔPmin is extracted from ΔP1 to ΔPn (step S102). Then, the extracted minimum value ΔPmin of the differential pressure is compared with a predetermined lower limit value ΔPLth of the differential pressure (step S103).

ここで、差圧の最小値ΔＰｍｉｎが下限値ΔＰＬｔｈ以下であった場合（ステップＳ１０３のＹＥＳ）、制御装置１５は、給気ダクト４内の静圧の設定値ＰＤｓｐを予め定められている所定幅αだけ上げる（ステップＳ１０４）。この場合、制御装置１５は、その変更した静圧の設定値ＰＤｓｐ（ＰＤｓｐ＝ＰＤｓｐ（現在値）＋α）と静圧センサ１４によって検出される静圧ＰＤｐｖとが一致するように、給気ファン２の回転数をアップする。すなわち、制御装置１５は、計測された差圧ΔＰ１〜ΔＰｎの内、１つでも下限値ΔＰＬｔｈ以下の差圧があった場合、風量不足であるとみなして、給気ダクト４を流れる調和空気の風量を静圧の変化幅αに相当する量だけ増加させる。 Here, when the minimum value ΔPmin of the differential pressure is equal to or lower than the lower limit value ΔPLth (YES in step S103), the control device 15 sets the set value PDsp of the static pressure in the air supply duct 4 to a predetermined width that is set in advance. Increase by α (step S104). In this case, the controller 15 sets the air supply fan 2 so that the changed static pressure setting value PDsp (PDsp = PDsp (current value) + α) and the static pressure PDpv detected by the static pressure sensor 14 coincide with each other. Increase the number of revolutions. In other words, the control device 15 regards that the conditioned air flowing through the air supply duct 4 is regarded as having an insufficient air volume when at least one of the measured differential pressures ΔP1 to ΔPn has a differential pressure equal to or lower than the lower limit ΔPLth. The air volume is increased by an amount corresponding to the change width α of the static pressure.

差圧の最小値ΔＰｍｉｎが下限値ΔＰＬｔｈ以下でなかった場合（ステップＳ１０３のＮＯ）、制御装置１５は、計測された差圧ΔＰ１〜ΔＰｎの中から最大の差圧ΔＰｍａｘを抽出し（ステップＳ１０５）、この抽出した差圧の最大値ΔＰｍａｘと予め定められている差圧の上限値ΔＰＨｔｈとを比較する（ステップＳ１０６）。 When the minimum value ΔPmin of the differential pressure is not less than or equal to the lower limit value ΔPLth (NO in step S103), the control device 15 extracts the maximum differential pressure ΔPmax from the measured differential pressures ΔP1 to ΔPn (step S105). Then, the extracted maximum value ΔPmax of the differential pressure is compared with a predetermined upper limit value ΔPHth of the differential pressure (step S106).

ここで、差圧の最大値ΔＰｍａｘが上限値ΔＰＨｔｈ以上であった場合（ステップＳ１０６のＹＥＳ）、制御装置１５は、給気ダクト４内の静圧の設定値ＰＤｓｐを予め定められている所定幅βだけ下げる（ステップＳ１０７）。この場合、制御装置１５は、その変更した静圧の設定値ＰＤｓｐ（ＰＤｓｐ＝ＰＤｓｐ（現在値）−β）と静圧センサ１４によって検出される静圧ＰＤｐｖとが一致するように、給気ファン２の回転数をダウンする。すなわち、制御装置１５は、計測された差圧ΔＰ１〜ΔＰｎに下限値ΔＰＬｔｈ以下の差圧がなく、１つでも上限値ΔＰＨｔｈ以上の差圧があった場合、風量もしくは静圧過剰であるとみなして、調和空気の流れる給気ダクト４内の静圧を減少させる。静圧減少により風量が減少しても、風量制御装置の動作により適切な風量が維持される。 Here, when the maximum value ΔPmax of the differential pressure is equal to or greater than the upper limit value ΔPHth (YES in step S106), the control device 15 sets the static pressure set value PDsp in the air supply duct 4 to a predetermined width. Decrease by β (step S107). In this case, the control device 15 determines that the changed static pressure setting value PDsp (PDsp = PDsp (current value) −β) matches the static pressure PDpv detected by the static pressure sensor 14. Decrease the number of revolutions of 2. That is, the control device 15 considers that the air volume or the static pressure is excessive if the measured differential pressures ΔP1 to ΔPn have no differential pressure equal to or lower than the lower limit value ΔPLth and any differential pressure equal to or higher than the upper limit value ΔPHth. Thus, the static pressure in the air supply duct 4 through which the conditioned air flows is reduced. Even if the air volume decreases due to a decrease in static pressure, an appropriate air volume is maintained by the operation of the air volume control device.

差圧の最大値ΔＰｍａｘが上限値ΔＰＨｔｈ以上でなかった場合（ステップＳ１０６のＮＯ）、制御装置１５は、給気ダクト４内の静圧の設定値ＰＤｓｐの変更は行わない（ステップＳ１０８）。すなわち、制御装置１５は、計測された差圧ΔＰ１〜ΔＰｎが全て下限値ΔＰＬｔｈと上限値ΔＰＨｔｈとの間にあった場合、風量に過不足は生じていないと判断し、給気ダクト４を流れる調和空気の静圧の変更を行わず、現在の状態を維持する。 If the maximum value ΔPmax of the differential pressure is not equal to or greater than the upper limit value ΔPHth (NO in step S106), the control device 15 does not change the set value PDsp of the static pressure in the air supply duct 4 (step S108). That is, when all the measured differential pressures ΔP1 to ΔPn are between the lower limit value ΔPLth and the upper limit value ΔPHth, the control device 15 determines that there is no excess or deficiency in the air volume, and the conditioned air flowing through the air supply duct 4 The current state is maintained without changing the static pressure.

制御装置１５は、このステップＳ１０１〜Ｓ１０８の処理動作を一定周期毎に繰り返す。このような処理動作の繰り返しによって、ベンチュリ型ＶＡＶ１０−１〜１０−ｎからその装置の開度θ１〜θｎを示す信号を得ることができなくても、風量不足の解消と省エネルギーとの両立が図られるものとなる。 The control device 15 repeats the processing operations of steps S101 to S108 at regular intervals. By repeating such processing operations, even if it is not possible to obtain signals indicating the opening degrees θ1 to θn of the apparatus from the Venturi type VAVs 10-1 to 10-n, it is possible to achieve both the elimination of airflow shortage and energy saving. It will be.

図３にこの給気ダクト内静圧調整機能の方式１を採用した場合の制御装置１５の要部の機能ブロック図を示す。同図において、１５Ａ１はベンチュリ型ＶＡＶ差圧監視部、１５Ａ２は最小値差圧抽出部、１５Ａ３は最大値差圧抽出部、１５Ａ４は下限値記憶部、１５Ａ５は上限値記憶部、１５Ａ６は最小値差圧比較部、１５Ａ７は最大値差圧比較部、１５Ａ８は所定幅α記憶部、１５Ａ９は所定幅β記憶部、１５Ａ１０は静圧設定値変更部である。 FIG. 3 shows a functional block diagram of the main part of the control device 15 when the system 1 for adjusting the static pressure in the air supply duct is adopted. In the figure, 15A1 is a Venturi type VAV differential pressure monitoring unit, 15A2 is a minimum value differential pressure extraction unit, 15A3 is a maximum value differential pressure extraction unit, 15A4 is a lower limit value storage unit, 15A5 is an upper limit value storage unit, and 15A6 is a minimum value. A differential pressure comparison unit, 15A7 is a maximum value differential pressure comparison unit, 15A8 is a predetermined width α storage unit, 15A9 is a predetermined width β storage unit, and 15A10 is a static pressure set value changing unit.

この機能ブロック図において、ベンチュリ型ＶＡＶ差圧監視部１５Ａ１はベンチュリ型ＶＡＶ１０−１０−１〜１０−ｎの前後の差圧ΔＰ１〜ΔＰｎを取り込む。最小値差圧抽出部１５Ａ２はベンチュリ型ＶＡＶ差圧監視部１５Ａ１が取り込んだ差圧ΔＰ１〜ΔＰｎの中から最小の差圧ΔＰｍｉｎを抽出する。最小値差圧比較部１５Ａ６は、抽出された差圧ΔＰｍｉｎと下限値記憶部１５Ａ４に記憶されている下限値ΔＰＬｔｈとを比較し、ΔＰｍｉｎ≦ΔＰＬｔｈであれば静圧設定値変更部１５Ａ１０へ静圧設定値の変更指令を送り、ΔＰｍｉｎ＞ΔＰＬｔｈであれば最大値抽出部１５Ａ３へ最大値抽出指令を送る。静圧設定値変更部１５Ａ１０は、最小値差圧比較部１５Ａ６から静圧設定値の変更指令を受けると、所定幅α記憶部１５Ａ８に記憶されている所定幅αを読み出し、この所定幅αを現在の静圧設定値ＰＤｓｐに加算し、変更後の静圧設定値ＰＤｓｐとする。 In this functional block diagram, the venturi-type VAV differential pressure monitoring unit 15A1 takes in differential pressures ΔP1 to ΔPn before and after the venturi-type VAV 10-10-1 to 10-n. The minimum value differential pressure extraction unit 15A2 extracts the minimum differential pressure ΔPmin from the differential pressures ΔP1 to ΔPn taken in by the venturi type VAV differential pressure monitoring unit 15A1. The minimum value differential pressure comparison unit 15A6 compares the extracted differential pressure ΔPmin with the lower limit value ΔPLth stored in the lower limit value storage unit 15A4, and if ΔPmin ≦ ΔPLth, the static pressure set value change unit 15A10 A setting value change command is sent, and if ΔPmin> ΔPLth, a maximum value extraction command is sent to the maximum value extraction unit 15A3. When the static pressure set value changing unit 15A10 receives the static pressure set value change command from the minimum value differential pressure comparing unit 15A6, the static pressure set value changing unit 15A10 reads the predetermined width α stored in the predetermined width α storage unit 15A8 and uses the predetermined width α. This is added to the current static pressure setting value PDsp to obtain the changed static pressure setting value PDsp.

最大値抽出部１５Ａ３は、最小値差圧比較部１５Ａ６からの最大値抽出指令を受けて、ベンチュリ型ＶＡＶ差圧監視部１５Ａ１が取り込んだ差圧ΔＰ１〜ΔＰｎの中から最大の差圧ΔＰｍａｘを抽出する。最大値差圧比較部１５Ａ７は、抽出された差圧ΔＰｍａｘと上限値記憶部１５Ａ５に記憶されている上限値ΔＰＨｔｈとを比較し、ΔＰｍａｘ≧ΔＰＨｔｈであれば静圧設定値変更部１５Ａ１０へ静圧設定値の変更指令を送る。静圧設定値変更部１５Ａ１０は、最大値差圧比較部１５Ａ７から静圧設定値の変更指令を受けると、所定幅β記憶部１５Ａ９に記憶されている所定幅βを読み出し、この所定幅βを現在の静圧設定値ＰＤｓｐから減算し、変更後の静圧設定値ＰＤｓｐとする。 The maximum value extraction unit 15A3 receives the maximum value extraction command from the minimum value differential pressure comparison unit 15A6 and extracts the maximum differential pressure ΔPmax from the differential pressures ΔP1 to ΔPn taken in by the Venturi type VAV differential pressure monitoring unit 15A1. To do. The maximum value differential pressure comparison unit 15A7 compares the extracted differential pressure ΔPmax with the upper limit value ΔPHth stored in the upper limit value storage unit 15A5, and if ΔPmax ≧ ΔPHth, the static pressure setting value changing unit 15A10 receives the static pressure. Sends a set value change command. When the static pressure set value changing unit 15A10 receives a static pressure set value change command from the maximum value differential pressure comparing unit 15A7, the static pressure set value changing unit 15A10 reads the predetermined width β stored in the predetermined width β storage unit 15A9, and uses the predetermined width β. Subtract from the current static pressure setting value PDsp to obtain the changed static pressure setting value PDsp.

〔給気ダクト内静圧調整機能：方式２〕
制御装置１５は、差圧センサＳ１〜Ｓ１によって計測されたベンチュリ型ＶＡＶ１０−１０−１〜１０−ｎの前後の差圧ΔＰ１〜ΔＰｎを取り込み（図４：ステップＳ２０１）、この計測された差圧ΔＰ１〜ΔＰｎの中から最小の差圧ΔＰｍｉｎを抽出する（ステップＳ２０２）。そして、この抽出した差圧の最小値ΔＰｍｉｎと予め定められている差圧の下限値ΔＰＬｔｈとを比較する（ステップＳ２０３）。 [Static pressure adjustment function in air supply duct: Method 2]
The control device 15 takes in the differential pressures ΔP1 to ΔPn before and after the venturi-type VAVs 10-10-1 to 10-n measured by the differential pressure sensors S1 to S1 (FIG. 4: Step S201), and this measured differential pressure. The minimum differential pressure ΔPmin is extracted from ΔP1 to ΔPn (step S202). Then, the extracted minimum value ΔPmin of the differential pressure is compared with a predetermined lower limit value ΔPLth of the differential pressure (step S203).

ここで、差圧の最小値ΔＰｍｉｎが下限値ΔＰＬｔｈ以下であった場合（ステップＳ２０３のＹＥＳ）、制御装置１５は、差圧の最小値ΔＰｍｉｎと下限値ΔＰＬｔｈとの差をα＝ΔＰＬｔｈ−ΔＰｍｉｎとして求め（ステップＳ２０４）、給気ダクト４内の静圧の設定値ＰＤｓｐをαだけ上げる（ステップＳ２０５）。この場合、制御装置１５は、その変更した静圧の設定値ＰＤｓｐ（ＰＤｓｐ＝ＰＤｓｐ（現在値）＋α）と静圧センサ１４によって検出される静圧ＰＤｐｖとが一致するように、給気ファン２の回転数をアップする。すなわち、制御装置１５は、計測された差圧ΔＰ１〜ΔＰｎの内、１つでも下限値ΔＰＬｔｈ以下の差圧があった場合、風量不足であるとみなして、給気ダクト４を流れる調和空気の風量を静圧の変化幅αに相当する量だけ増加させる。 Here, when the minimum value ΔPmin of the differential pressure is equal to or lower than the lower limit value ΔPLth (YES in step S203), the control device 15 sets the difference between the minimum value ΔPmin of the differential pressure and the lower limit value ΔPLth as α = ΔPLth−ΔPmin. The static pressure setting value PDsp in the air supply duct 4 is increased by α (step S205). In this case, the controller 15 sets the air supply fan 2 so that the changed static pressure setting value PDsp (PDsp = PDsp (current value) + α) and the static pressure PDpv detected by the static pressure sensor 14 coincide with each other. Increase the number of revolutions. In other words, the control device 15 regards that the conditioned air flowing through the air supply duct 4 is regarded as having an insufficient air volume when at least one of the measured differential pressures ΔP1 to ΔPn has a differential pressure equal to or lower than the lower limit ΔPLth. The air volume is increased by an amount corresponding to the change width α of the static pressure.

差圧の最小値ΔＰｍｉｎが下限値ΔＰＬｔｈ以下でなかった場合（ステップＳ２０３のＮＯ）、制御装置１５は、計測された差圧ΔＰ１〜ΔＰｎの中から最大の差圧ΔＰｍａｘを抽出し（ステップＳ２０６）、この抽出した差圧の最大値ΔＰｍａｘと予め定められている差圧の上限値ΔＰＨｔｈとを比較する（ステップＳ２０７）。 When the minimum value ΔPmin of the differential pressure is not less than or equal to the lower limit value ΔPLth (NO in step S203), the control device 15 extracts the maximum differential pressure ΔPmax from the measured differential pressures ΔP1 to ΔPn (step S206). Then, the extracted maximum value ΔPmax of the differential pressure is compared with a predetermined upper limit value ΔPHth of the differential pressure (step S207).

ここで、差圧の最大値ΔＰｍａｘが上限値ΔＰＨｔｈ以上であった場合（ステップＳ２０７のＹＥＳ）、制御装置１５は、差圧の最大値ΔＰｍａｘと上限値ΔＰＨｔｈとの差をβ１＝ΔＰｍａｘ−ΔＰＨｔｈとして求め（ステップＳ２０８）、また差圧の最小値ΔＰｍｉｎと下限値ΔＰＬｔｈとの差をβ２＝ΔＰｍｉｎ−ΔＰＬｔｈとして求め（ステップＳ２０９）、この求めたβ１とβ２のうち何れか小さい方（制御余裕の小さい方）をβとし（ステップＳ２１０）、給気ダクト４内の静圧の設定値ＰＤｓｐをβだけ下げる（ステップＳ２１１）。 When the maximum differential pressure value ΔPmax is equal to or greater than the upper limit value ΔPHth (YES in step S207), the control device 15 sets the difference between the maximum differential pressure value ΔPmax and the upper limit value ΔPHth as β1 = ΔPmax−ΔPHth. Determination (step S208), and the difference between the minimum value ΔPmin and the lower limit value ΔPLth of the differential pressure is determined as β2 = ΔPmin−ΔPLth (step S209), and the smaller one of the calculated β1 and β2 (the control margin is small) Is set to β (step S210), and the static pressure set value PDsp in the air supply duct 4 is lowered by β (step S211).

この場合、制御装置１５は、その変更した静圧の設定値ＰＤｓｐ（ＰＤｓｐ＝ＰＤｓｐ（現在値）−β）と静圧センサ１４によって検出される静圧ＰＤｐｖとが一致するように、給気ファン２の回転数をダウンする。すなわち、制御装置１５は、計測された差圧ΔＰ１〜ΔＰｎに下限値ΔＰＬｔｈ以下の差圧がなく、１つでも上限値ΔＰＨｔｈ以上の差圧があった場合、風量もしくは静圧過剰であるとみなして、調和空気の流れる給気ダクト４内の静圧を減少させる。静圧減少により風量が減少しても、風量制御装置の動作により適切な風量が維持される。 In this case, the control device 15 determines that the changed static pressure setting value PDsp (PDsp = PDsp (current value) −β) matches the static pressure PDpv detected by the static pressure sensor 14. Decrease the number of revolutions of 2. That is, the control device 15 considers that the air volume or the static pressure is excessive if the measured differential pressures ΔP1 to ΔPn have no differential pressure equal to or lower than the lower limit value ΔPLth and any differential pressure equal to or higher than the upper limit value ΔPHth. Thus, the static pressure in the air supply duct 4 through which the conditioned air flows is reduced. Even if the air volume decreases due to a decrease in static pressure, an appropriate air volume is maintained by the operation of the air volume control device.

差圧の最大値ΔＰｍａｘが上限値ΔＰＨｔｈ以上でなかった場合（ステップＳ２０７のＮＯ）、制御装置１５は、現在の給気ダクト４内の静圧の設定値ＰＤｓｐの変更は行わない（ステップＳ２１２）。すなわち、制御装置１５は、計測された差圧ΔＰ１〜ΔＰｎが全て下限値ΔＰＬｔｈと上限値ΔＰＨｔｈとの間にあった場合、風量に過不足は生じていないと判断し、給気ダクト４内の静圧変更を行わず、現在の状態を維持する。 If the maximum value ΔPmax of the differential pressure is not equal to or greater than the upper limit value ΔPHth (NO in step S207), the control device 15 does not change the current static pressure set value PDsp in the air supply duct 4 (step S212). . That is, when all of the measured differential pressures ΔP1 to ΔPn are between the lower limit value ΔPLth and the upper limit value ΔPHth, the control device 15 determines that there is no excess or deficiency in the air volume, and the static pressure in the air supply duct 4 Keep the current state without making any changes.

制御装置１５は、このステップＳ２０１〜Ｓ２１２の処理動作を一定周期毎に繰り返す。このような処理動作の繰り返しによって、ベンチュリ型ＶＡＶ１０−１〜１０−ｎからその装置の開度θ１〜θｎを示す信号を得ることができなくても、風量不足の解消と省エネルギーとの両立が図られるものとなる。 The control device 15 repeats the processing operations of steps S201 to S212 at regular intervals. By repeating such processing operations, even if it is not possible to obtain signals indicating the opening degrees θ1 to θn of the apparatus from the Venturi type VAVs 10-1 to 10-n, it is possible to achieve both the elimination of airflow shortage and energy saving. It will be.

図５にこの給気ダクト内静圧調整機能の方式２を採用した場合の制御装置１５の要部の機能ブロック図を示す。同図において、１５Ｂ１はベンチュリ型ＶＡＶ差圧監視部、１５Ｂ２は最小値差圧抽出部、１５Ｂ３は最大値差圧抽出部、１５Ｂ４は下限値記憶部、１５Ｂ５は上限値記憶部、１５Ｂ６は最小値差圧比較部、１５Ｂ７は最大値差圧比較部、１５Ｂ８はα算出部、１５Ｂ９はβ算出部、１５Ｂ１０は静圧設定値変更部である。 FIG. 5 shows a functional block diagram of the main part of the control device 15 when the method 2 of the static pressure adjusting function in the air supply duct is adopted. In the figure, 15B1 is a Venturi type VAV differential pressure monitoring unit, 15B2 is a minimum value differential pressure extraction unit, 15B3 is a maximum value differential pressure extraction unit, 15B4 is a lower limit value storage unit, 15B5 is an upper limit value storage unit, and 15B6 is a minimum value. A differential pressure comparison unit, 15B7 is a maximum differential pressure comparison unit, 15B8 is an α calculation unit, 15B9 is a β calculation unit, and 15B10 is a static pressure set value change unit.

この機能ブロック図において、ベンチュリ型ＶＡＶ差圧監視部１５Ｂ１はベンチュリ型ＶＡＶ１０−１０−１〜１０−ｎの前後の差圧ΔＰ１〜ΔＰｎを取り込む。最小値差圧抽出部１５Ｂ２はベンチュリ型ＶＡＶ差圧監視部１５Ｂ１が取り込んだ差圧ΔＰ１〜ΔＰｎの中から最小の差圧ΔＰｍｉｎを抽出する。最小値差圧比較部１５Ｂ６は、抽出された差圧ΔＰｍｉｎと下限値記憶部１５Ｂ４に記憶されている下限値ΔＰＬｔｈとを比較し、ΔＰｍｉｎ≦ΔＰＬｔｈであればα算出部１５Ｂ８へ算出指令を送り、ΔＰｍｉｎ＞ΔＰＬｔｈであれば最大値抽出部１５Ｂ３へ最大値抽出指令を送る。α算出部１５Ｂ８は、最小値差圧比較部１５Ｂ６から算出指令を受けると、下限値記憶部１５Ｂ４から下限値ΔＰＬｔｈを読み出し、差圧の最小値ΔＰｍｉｎと下限値ΔＰＬｔｈとの差をα＝ΔＰＬｔｈ−ΔＰｍｉｎとして求め、静圧設定値変更部１５Ｂ１０へ送る。静圧設定値変更部１５Ｂ１０は、α算出部１５Ｂ８からのαを現在の静圧設定値ＰＤｓｐに加算し、変更後の静圧設定値ＰＤｓｐとする。 In this functional block diagram, the venturi-type VAV differential pressure monitoring unit 15B1 takes in differential pressures ΔP1 to ΔPn before and after the venturi-type VAV 10-10-1 to 10-n. The minimum value differential pressure extraction unit 15B2 extracts the minimum differential pressure ΔPmin from the differential pressures ΔP1 to ΔPn taken in by the venturi type VAV differential pressure monitoring unit 15B1. The minimum value differential pressure comparison unit 15B6 compares the extracted differential pressure ΔPmin with the lower limit value ΔPLth stored in the lower limit value storage unit 15B4, and if ΔPmin ≦ ΔPLth, sends a calculation command to the α calculation unit 15B8, If ΔPmin> ΔPLth, a maximum value extraction command is sent to the maximum value extraction unit 15B3. Upon receiving the calculation command from the minimum value differential pressure comparison unit 15B6, the α calculation unit 15B8 reads the lower limit value ΔPLth from the lower limit value storage unit 15B4, and calculates the difference between the minimum value ΔPmin and the lower limit value ΔPLth of the differential pressure as α = ΔPLth− It calculates | requires as (DELTA) Pmin and sends to static pressure setting value change part 15B10. The static pressure set value changing unit 15B10 adds α from the α calculating unit 15B8 to the current static pressure set value PDsp to obtain the changed static pressure set value PDsp.

最大値抽出部１５Ｂ３は、最小値差圧比較部１５Ｂ６からの最大値抽出指令を受けて、ベンチュリ型ＶＡＶ差圧監視部１５Ｂ１が取り込んだ差圧ΔＰ１〜ΔＰｎの中から最大の差圧ΔＰｍａｘを抽出する。最大値差圧比較部１５Ｂ７は、抽出された差圧ΔＰｍａｘと上限値記憶部１５Ｂ５に記憶されている上限値ΔＰＨｔｈとを比較し、ΔＰｍａｘ≧ΔＰＨｔｈであればβ算出部１５Ｂ９へ算出指令を送る。β算出部１５Ｂ９は、最大値差圧比較部１５Ｂ７から算出指令を受けると、下限値記憶部１５Ｂ４および上限値記憶部１５Ｂ５から下限値ΔＰＬｔｈおよび上限値ΔＰＨｔｈを読み出し、差圧の最大値ΔＰｍａｘと上限値ΔＰＨｔｈとの差をβ１＝ΔＰｍａｘ−ΔＰＨｔｈとして求め、差圧の最小値ΔＰｍｉｎと下限値ΔＰＬｔｈとの差をβ２＝ΔＰｍｉｎ−ΔＰＬｔｈとして求め、この求めたβ１とβ２のうち何れか小さい方をβとして、静圧設定値変更部１５Ｂ１０へ送る。静圧設定値変更部１５Ｂ１０は、β算出部１５Ｂ８からのβを現在の静圧設定値ＰＤｓｐから減算し、変更後の静圧設定値ＰＤｓｐとする。 The maximum value extraction unit 15B3 receives the maximum value extraction command from the minimum value differential pressure comparison unit 15B6, and extracts the maximum differential pressure ΔPmax from the differential pressures ΔP1 to ΔPn taken in by the Venturi type VAV differential pressure monitoring unit 15B1. To do. The maximum value differential pressure comparison unit 15B7 compares the extracted differential pressure ΔPmax with the upper limit value ΔPHth stored in the upper limit value storage unit 15B5, and sends a calculation command to the β calculation unit 15B9 if ΔPmax ≧ ΔPHth. When receiving the calculation command from the maximum value differential pressure comparison unit 15B7, the β calculation unit 15B9 reads the lower limit value ΔPLth and the upper limit value ΔPHth from the lower limit value storage unit 15B4 and the upper limit value storage unit 15B5, and the differential pressure maximum value ΔPmax and the upper limit value The difference from the value ΔPHth is obtained as β1 = ΔPmax−ΔPHth, the difference between the minimum value ΔPmin and the lower limit value ΔPLth of the differential pressure is obtained as β2 = ΔPmin−ΔPLth, and the smaller one of the obtained β1 and β2 is determined as β To the static pressure set value changing unit 15B10. The static pressure set value changing unit 15B10 subtracts β from the β calculating unit 15B8 from the current static pressure set value PDsp to obtain a changed static pressure set value PDsp.

〔実施の形態２〕
図６はこの発明に係る風量制御システムの他の実施の形態（実施の形態２）の概略を示す図である。同図において、図１と同一符号は図１を参照して説明した構成要素と同一或いは同等構成要素を示し、その説明は省略する。この風量制御システムでは、給気ダクト４内の静圧の設定値ＰＤｓｐを変更するのではなく、給気ファン２の回転数を調整するインバータ出力値を直接変更する方式としている。このため、給気ダクト４には、静圧センサ１４を設けていない。 [Embodiment 2]
FIG. 6 is a diagram showing an outline of another embodiment (Embodiment 2) of the air volume control system according to the present invention. 1, the same reference numerals as those in FIG. 1 denote the same or equivalent components as those described with reference to FIG. 1, and the description thereof will be omitted. This air volume control system does not change the static pressure set value PDsp in the air supply duct 4 but directly changes the inverter output value for adjusting the rotation speed of the air supply fan 2. For this reason, the static pressure sensor 14 is not provided in the air supply duct 4.

この風量制御システムにおいて、制御装置１５は、差圧センサＳ１〜Ｓ１によって計測されたベンチュリ型ＶＡＶ１０−１０−１〜１０−ｎの前後の差圧ΔＰ１〜ΔＰｎを取り込み（図５：ステップＳ３０１）、この計測された差圧ΔＰ１〜ΔＰｎの中から最小の差圧ΔＰｍｉｎを抽出する（ステップＳ３０２）。そして、この抽出した差圧の最小値ΔＰｍｉｎと予め定められている差圧の下限値ΔＰＬｔｈとを比較する（ステップＳ３０３）。 In this air volume control system, the control device 15 takes in the differential pressures ΔP1 to ΔPn before and after the venturi type VAV 10-10-1 to 10-n measured by the differential pressure sensors S1 to S1 (FIG. 5: step S301). The minimum differential pressure ΔPmin is extracted from the measured differential pressures ΔP1 to ΔPn (step S302). Then, the extracted minimum value ΔPmin of the differential pressure is compared with a predetermined lower limit value ΔPLth of the differential pressure (step S303).

ここで、差圧の最小値ΔＰｍｉｎが下限値ΔＰＬｔｈ以下であった場合（ステップＳ３０３のＹＥＳ）、制御装置１５は、給気ファン２へのインバータ出力値ＩＮＶを予め定められた所定幅γだけ上げる（ステップＳ３０４）。これにより、給気ファン２へのインバータ出力値ＩＮＶがＩＮＶ＝ＩＮＶ（現在値）＋γとなり、給気ファン２の回転数がγだけアップする。すなわち、制御装置１５は、計測された差圧ΔＰ１〜ΔＰｎの内、１つでも下限値ΔＰＬｔｈ以下の差圧があった場合、風量不足であるとみなして、給気ダクト４を流れる調和空気の風量をインバータ出力値の変化幅γに相当する量だけ増加させる。 Here, when the minimum value ΔPmin of the differential pressure is equal to or lower than the lower limit value ΔPLth (YES in step S303), the control device 15 increases the inverter output value INV to the air supply fan 2 by a predetermined width γ. (Step S304). As a result, the inverter output value INV to the air supply fan 2 becomes INV = INV (current value) + γ, and the rotation speed of the air supply fan 2 is increased by γ. In other words, the control device 15 regards that the conditioned air flowing through the air supply duct 4 is regarded as having an insufficient air volume when at least one of the measured differential pressures ΔP1 to ΔPn has a differential pressure equal to or lower than the lower limit ΔPLth. The air volume is increased by an amount corresponding to the change width γ of the inverter output value.

差圧の最小値ΔＰｍｉｎが下限値ΔＰＬｔｈ以下でなかった場合（ステップＳ３０３のＮＯ）、制御装置１５は、計測された差圧ΔＰ１〜ΔＰｎの中から最大の差圧ΔＰｍａｘを抽出し（ステップＳ３０５）、この抽出した差圧の最大値ΔＰｍａｘと予め定められている差圧の上限値ΔＰＨｔｈとを比較する（ステップＳ３０６）。 When the minimum value ΔPmin of the differential pressure is not less than or equal to the lower limit value ΔPLth (NO in step S303), the control device 15 extracts the maximum differential pressure ΔPmax from the measured differential pressures ΔP1 to ΔPn (step S305). The extracted differential pressure maximum value ΔPmax is compared with a predetermined differential pressure upper limit value ΔPHth (step S306).

ここで、差圧の最大値ΔＰｍａｘが上限値ΔＰＨｔｈ以上であった場合（ステップＳ３０６のＹＥＳ）、制御装置１５は、給気ファン２へのインバータ出力値ＩＮＶを予め定められた所定幅δだけ上げる（ステップＳ３０８）。これにより、給気ファン２へのインバータ出力値ＩＮＶがＩＮＶ＝ＩＮＶ（現在値）−δとなり、給気ファン２の回転数がδだけダウンする。すなわち、制御装置１５は、計測された差圧ΔＰ１〜ΔＰｎに下限値ΔＰＬｔｈ以下の差圧がなく、１つでも上限値ΔＰＨｔｈ以上の差圧があった場合、風量もしくは静圧過剰であるとみなして、調和空気の流れる給気ダクト４内の静圧を減少させる。静圧減少により風量が減少しても、風量制御装置の動作により適切な風量が維持される。 Here, when maximum value ΔPmax of the differential pressure is equal to or greater than upper limit value ΔPHth (YES in step S306), control device 15 increases inverter output value INV to supply fan 2 by a predetermined width δ. (Step S308). As a result, the inverter output value INV to the air supply fan 2 becomes INV = INV (current value) −δ, and the rotation speed of the air supply fan 2 decreases by δ. That is, the control device 15 considers that the air volume or the static pressure is excessive if the measured differential pressures ΔP1 to ΔPn have no differential pressure equal to or lower than the lower limit value ΔPLth and any differential pressure equal to or higher than the upper limit value ΔPHth. Thus, the static pressure in the air supply duct 4 through which the conditioned air flows is reduced. Even if the air volume decreases due to a decrease in static pressure, an appropriate air volume is maintained by the operation of the air volume control device.

差圧の最大値ΔＰｍａｘが上限値ΔＰＨｔｈ以上でなかった場合（ステップＳ３０６のＮＯ）、制御装置１５は、給気ファン２へのインバータ出力値ＩＮＶの変更は行わない（ステップＳ３０８）。すなわち、制御装置１５は、計測された差圧ΔＰ１〜ΔＰｎが全て下限値ΔＰＬｔｈと上限値ΔＰＨｔｈとの間にあった場合、風量または静圧に過不足は生じていないと判断し、給気ダクト４内の静圧の変更を行わず、現在の状態を維持する。 When the maximum value ΔPmax of the differential pressure is not equal to or higher than the upper limit value ΔPHth (NO in step S306), the control device 15 does not change the inverter output value INV to the air supply fan 2 (step S308). That is, when all of the measured differential pressures ΔP1 to ΔPn are between the lower limit value ΔPLth and the upper limit value ΔPHth, the control device 15 determines that there is no excess or deficiency in the air volume or static pressure, and the inside of the air supply duct 4 The current state is maintained without changing the static pressure.

制御装置１５は、このステップＳ３０１〜Ｓ３０８の処理動作を一定周期毎に繰り返す。このような処理動作の繰り返しによって、ベンチュリ型ＶＡＶ１０−１〜１０−ｎからその装置の開度θ１〜θｎを示す信号を得ることができなくても、風量不足の解消と省エネルギーとの両立が図られるものとなる。 The control device 15 repeats the processing operations in steps S301 to S308 at regular intervals. By repeating such processing operations, even if it is not possible to obtain signals indicating the opening degrees θ1 to θn of the apparatus from the Venturi type VAVs 10-1 to 10-n, it is possible to achieve both the elimination of airflow shortage and energy saving. It will be.

図８にこの実施の形態２の風量制御システムにおける制御装置１５の要部の機能ブロック図を示す。同図において、１５Ｃ１はベンチュリ型ＶＡＶ差圧監視部、１５Ｃ２は最小値差圧抽出部、１５Ｃ３は最大値差圧抽出部、１５Ｃ４は下限値記憶部、１５Ｃ５は上限値記憶部、１５Ｃ６は最小値差圧比較部、１５Ｃ７は最大値差圧比較部、１５Ｃ８は所定幅γ記憶部、１５Ｃ９は所定幅δ記憶部、１５Ｃ１０はインバータ出力値変更部である。 FIG. 8 shows a functional block diagram of a main part of the control device 15 in the air volume control system of the second embodiment. In the figure, 15C1 is a venturi type VAV differential pressure monitoring unit, 15C2 is a minimum value differential pressure extraction unit, 15C3 is a maximum value differential pressure extraction unit, 15C4 is a lower limit value storage unit, 15C5 is an upper limit value storage unit, and 15C6 is a minimum value. A differential pressure comparison unit, 15C7 is a maximum differential pressure comparison unit, 15C8 is a predetermined width γ storage unit, 15C9 is a predetermined width δ storage unit, and 15C10 is an inverter output value change unit.

この機能ブロック図において、ベンチュリ型ＶＡＶ差圧監視部１５Ｃ１はベンチュリ型ＶＡＶ１０−１０−１〜１０−ｎの前後の差圧ΔＰ１〜ΔＰｎを取り込む。最小値差圧抽出部１５Ｃ２はベンチュリ型ＶＡＶ差圧監視部１５Ｃ１が取り込んだ差圧ΔＰ１〜ΔＰｎの中から最小の差圧ΔＰｍｉｎを抽出する。最小値差圧比較部１５Ｃ６は、抽出された差圧ΔＰｍｉｎと下限値記憶部１５Ｃ４に記憶されている下限値ΔＰＬｔｈとを比較し、ΔＰｍｉｎ≦ΔＰＬｔｈであればインバータ出力値変更部１５Ｃ１０へインバータ出力値の変更指令を送り、ΔＰｍｉｎ＞ΔＰＬｔｈであれば最大値抽出部１５Ｃ３へ最大値抽出指令を送る。インバータ出力値変更部１５Ｃ１０は、最小値差圧比較部１５Ｃ６からインバータ出力値の変更指令を受けると、所定幅γ記憶部１５Ｃ８に記憶されている所定幅γを読み出し、この所定幅γを現在のインバータ出力値ＩＮＶに加算し、変更後のインバータ出力値ＩＮＶとする。 In this functional block diagram, the Venturi type VAV differential pressure monitoring unit 15C1 takes in differential pressures ΔP1 to ΔPn before and after the Venturi type VAV 10-10-1 to 10-n. The minimum value differential pressure extraction unit 15C2 extracts the minimum differential pressure ΔPmin from the differential pressures ΔP1 to ΔPn taken in by the venturi type VAV differential pressure monitoring unit 15C1. The minimum value differential pressure comparison unit 15C6 compares the extracted differential pressure ΔPmin and the lower limit value ΔPLth stored in the lower limit value storage unit 15C4, and if ΔPmin ≦ ΔPLth, the inverter output value change unit 15C10 receives the inverter output value. If ΔPmin> ΔPLth, a maximum value extraction command is sent to the maximum value extraction unit 15C3. When the inverter output value change unit 15C10 receives the inverter output value change instruction from the minimum value differential pressure comparison unit 15C6, the inverter output value change unit 15C10 reads the predetermined width γ stored in the predetermined width γ storage unit 15C8, and uses the predetermined width γ as the current value. Add to the inverter output value INV to obtain the changed inverter output value INV.

最大値抽出部１５Ｃ３は、最小値差圧比較部１５Ｃ６からの最大値抽出指令を受けて、ベンチュリ型ＶＡＶ差圧監視部１５Ｃ１が取り込んだ差圧ΔＰ１〜ΔＰｎの中から最大の差圧ΔＰｍａｘを抽出する。最大値差圧比較部１５Ｃ７は、抽出された差圧ΔＰｍａｘと上限値記憶部１５Ｃ５に記憶されている上限値ΔＰＨｔｈとを比較し、ΔＰｍａｘ≧ΔＰＨｔｈであればインバータ出力値変更部１５Ｃ１０へインバータ出力値の変更指令を送る。インバータ出力値変更部１５Ｃ１０は、最大値差圧比較部１５Ｃ７からインバータ出力値の変更指令を受けると、所定幅δ記憶部１５Ｃ９に記憶されている所定幅δを読み出し、この所定幅δを現在のインバータ出力値ＩＮＶから減算し、変更後のインバータ出力値ＩＮＶとする。 The maximum value extraction unit 15C3 receives the maximum value extraction command from the minimum value differential pressure comparison unit 15C6, and extracts the maximum differential pressure ΔPmax from the differential pressures ΔP1 to ΔPn taken in by the Venturi type VAV differential pressure monitoring unit 15C1. To do. The maximum value differential pressure comparison unit 15C7 compares the extracted differential pressure ΔPmax with the upper limit value ΔPHth stored in the upper limit value storage unit 15C5. If ΔPmax ≧ ΔPHth, the inverter output value change unit 15C10 receives the inverter output value. Send the change command. When the inverter output value change unit 15C10 receives the inverter output value change command from the maximum value differential pressure comparison unit 15C7, the inverter output value change unit 15C10 reads the predetermined width δ stored in the predetermined width δ storage unit 15C9, Subtract from the inverter output value INV to obtain the changed inverter output value INV.

なお、上述した実施の形態１，２では、ベンチュリ型ＶＡＶ１０−１〜１０−ｎを給気系統に設けた場合を例にとって説明したが、ベンチュリ型ＶＡＶ１０−１〜１０−ｎを排気系統に設けた場合にも同様の制御を行うことが可能である。 In the first and second embodiments described above, the case where the venturi type VAVs 10-1 to 10-n are provided in the air supply system has been described as an example. However, the venturi type VAVs 10-1 to 10-n are provided in the exhaust system. It is possible to perform the same control in the case of

図９に排気系統にベンチュリ型ＶＡＶ１０−１〜１０−ｎを設けた場合の図１に対応する図を示す。この場合、ＶＡＶコントローラ１３−１〜１３−ｎによって、制御対象空間１−１〜１−ｎの室圧ＰＲ１ｐｖ〜ＰＲｎｐｖを設定室圧ＰＲ１ｓｐ〜ＰＲｎｓｐに一致させるように、ベンチュリ型ＶＡＶ１０−１〜１０−ｎを通過する制御対象空間１−１〜１−ｎからの排気ダクト５への調和空気の風量を制御する。また、制御装置１５において、ベンチュリ型ＶＡＶ１０−１〜１０−ｎの前後の差圧ΔＰ１〜ΔＰｎに基づいて排気ダクト５内の静圧の設定値を変更し、排気ファン３の回転数を調整し、排気ダクト５内の静圧を増減させる。なお、給気側でも同様に制御可能である。 FIG. 9 shows a view corresponding to FIG. 1 when venturi-type VAVs 10-1 to 10-n are provided in the exhaust system. In this case, the Venturi type VAVs 10-1 to 10-10 are controlled by the VAV controllers 13-1 to 13-n so that the chamber pressures PR1pv to PRnpv in the control target spaces 1-1 to 1-n coincide with the set chamber pressures PR1sp to PRnsp. The air volume of the conditioned air from the controlled spaces 1-1 to 1-n passing through -n to the exhaust duct 5 is controlled. Further, in the control device 15, the set value of the static pressure in the exhaust duct 5 is changed based on the differential pressures ΔP1 to ΔPn before and after the venturi type VAVs 10-1 to 10-n, and the rotational speed of the exhaust fan 3 is adjusted. The static pressure in the exhaust duct 5 is increased or decreased. The same control can be performed on the supply side.

また、上述した実施の形態１，２では、ベンチュリ形の風量制御装置を用いた例で説明したが、本発明における風量制御装置はベンチュリ形の風量制御装置に限られるものではない。また、本発明において、風量制御装置は開度センサを有さない風量制御装置に限られるものではなく、開度センサを有する風量制御装置であっても構わない。 In the first and second embodiments described above, the example using the venturi-type air flow control device has been described. However, the air flow control device according to the present invention is not limited to the venturi-type air flow control device. In the present invention, the air volume control device is not limited to the air volume control device that does not include the opening sensor, and may be an air flow control device that includes the opening sensor.

また、上述した実施の形態１，２では、制御対象空間１−１〜１−ｎの室内温度を制御する例で説明したが、制御対象空間１−１〜１−ｎの例えばＣＯ２濃度を制御するような例でも同様にして適用することが可能である。 Moreover, although Embodiment 1 and 2 mentioned above demonstrated by the example which controls the indoor temperature of control object space 1-1 to 1-n, for example, CO2 density | concentration of control object space 1-1 to 1-n is controlled. Such an example can be applied in the same manner.

本発明の風量制御システムおよび風量制御方法は、ビルや工場などの大規模な施設における各室の給気制御や室圧制御など様々な分野で利用することが可能である。 The air volume control system and the air volume control method of the present invention can be used in various fields such as air supply control and room pressure control of each room in a large-scale facility such as a building or a factory.

１−１〜１−ｎ…制御対象空間、２…給気ファン、３…排気ファン、４…給気ダクト、Ｄ１〜Ｄｎ…ダクト、５…排気ダクト、７…温度センサ、１０−１〜１０−ｎ…ベンチュリ型ＶＡＶ、１０Ａ…ベンチュリ管（弁座）、１０Ｂ…コーン（弁栓）、１０Ｃ…レバー、１０Ｄ…シャフト（弁軸）、Ｓ１〜Ｓｎ…差圧センサ、１３−１〜１３−ｎ…ＶＡＶコントローラ、、１４…静圧センサ、１５…制御装置、１５Ａ１，１５Ｂ１，１５Ｃ１…ベンチュリ型ＶＡＶ差圧監視部、１５Ａ２，１５Ｂ２，１５Ｃ２…最小値差圧抽出部、１５Ａ３，１５Ｂ３，１５Ｃ３…最大値差圧抽出部、１５Ａ４，１５Ｂ４，１５Ｃ４…下限値記憶部、１５Ａ５，１５Ｂ５，１５Ｃ５…上限値記憶部、１５Ａ６，１５Ｂ６，１５Ｃ６…最小値差圧比較部、１５Ａ７，１５Ｂ７，１５Ｃ７…最大値差圧比較部、１５Ａ８…所定幅α記憶部、１５Ｂ８…α算出部、１５Ｃ８…所定幅γ記憶部、１５Ａ９…所定幅β記憶部、１５Ｂ９…β算出部、１５Ｃ９…所定幅δ記憶部、１５Ａ１０，１５Ｂ１０…静圧設定値変更部、１５Ｃ１０…インバータ出力値変更部。 1-1 to 1-n: Control target space, 2 ... Air supply fan, 3 ... Exhaust fan, 4 ... Air supply duct, D1 to Dn ... Duct, 5 ... Exhaust duct, 7 ... Temperature sensor, 10-1 to 10 -N ... Venturi type VAV, 10A ... Venturi tube (valve seat), 10B ... cone (valve stopper), 10C ... lever, 10D ... shaft (valve shaft), S1 to Sn ... differential pressure sensors, 13-1 to 13- n ... VAV controller, 14 ... static pressure sensor, 15 ... control device, 15A1, 15B1, 15C1 ... Venturi type VAV differential pressure monitoring unit, 15A2, 15B2, 15C2 ... minimum value differential pressure extraction unit, 15A3, 15B3, 15C3 ... Maximum value differential pressure extraction unit, 15A4, 15B4, 15C4 ... Lower limit value storage unit, 15A5, 15B5, 15C5 ... Upper limit value storage unit, 15A6, 15B6, 15C6 ... Minimum value differential pressure comparison unit, 15A7 15B7, 15C7 ... maximum value differential pressure comparison unit, 15A8 ... predetermined width α storage unit, 15B8 ... α calculation unit, 15C8 ... predetermined width γ storage unit, 15A9 ... predetermined width β storage unit, 15B9 ... β calculation unit, 15C9 ... predetermined Width δ storage unit, 15A10, 15B10 ... static pressure set value changing unit, 15C10 ... inverter output value changing unit.

Claims

First to Nth (N ≧ 2) control target spaces;
First to Nth ducts that branch from the main duct and communicate with the first to Nth controlled spaces;
First to Nth air flow control devices provided to each of the first to Nth ducts;
First to Nth airflow control device adjusting means for controlling the airflow passing through the first to Nth airflow control devices individually according to the load status of the first to Nth target spaces;
First to Nth differential pressure measuring means for measuring the differential pressure before and after the first to Nth air flow control devices;
The minimum differential pressure is extracted from the differential pressures measured by the first to Nth differential pressure measuring means, and the extracted minimum value of the differential pressure is compared with a predetermined lower limit value of the differential pressure. When the minimum value of the differential pressure is less than or equal to the lower limit value, the static pressure in the main duct is increased, while when the minimum value of the differential pressure is not less than or equal to the lower limit value, The maximum differential pressure is extracted from the differential pressures measured by the first to N-th differential pressure measuring means, and the maximum value of the extracted differential pressure is compared with a predetermined upper limit value of the differential pressure, An air volume control system comprising: main duct static pressure adjusting means for reducing the static pressure in the main duct when the maximum value of the differential pressure is equal to or greater than the upper limit value.

In the air volume control system according to claim 1,
The main duct static pressure adjusting means includes:
Increasing the static pressure in the main duct by increasing the set value of the static pressure in the main duct,
An air volume control system, wherein the static pressure in the main duct is reduced by lowering the set value of the static pressure in the main duct.

In the air volume control system according to claim 1,
The main duct static pressure adjusting means includes:
Increase the static pressure in the main duct by increasing the inverter output value to adjust the rotational speed of the fan provided for the main duct,
An air volume control system, wherein the static pressure in the main duct is reduced by reducing an inverter output value for adjusting a rotation speed of a fan provided for the main duct.

In the air volume control system according to claim 1,
The air volume control system, wherein the main duct is an air supply duct that forms a supply passage of conditioned air to the first to Nth control target spaces.

In the air volume control system according to claim 1,
The main duct is
It is an exhaust duct which makes the exhaust passage of the conditioned air from the said 1st-Nth control object space. The air volume control system characterized by the above-mentioned.

First to Nth (N ≧ 2) control target spaces, first to Nth ducts that branch from the main duct and communicate with the first to Nth control target spaces, and the first to Nth ducts. The first to Nth airflow control devices provided in each of the Nth ducts and the airflow passing through the first to Nth airflow control devices are used as load conditions of the first to Nth air conditioning target spaces. And first to Nth air flow control device adjusting means for controlling each of them individually, and first to Nth differential pressure measuring means for measuring the differential pressure before and after the first to Nth air flow control devices, respectively. An air volume control method applied to a system comprising:
The minimum differential pressure is extracted from the differential pressures measured by the first to Nth differential pressure measuring means, and the minimum value of the extracted differential pressure is compared with a predetermined lower limit value of the differential pressure. And when the minimum value of the differential pressure is less than or equal to the lower limit value, a static pressure increase step in the main duct that increases the static pressure in the main duct; and
When the minimum value of the differential pressure is not less than or equal to the lower limit value, the maximum differential pressure is extracted from the differential pressures measured by the first to Nth differential pressure measuring means, and the extracted difference When the maximum value of the pressure is compared with a predetermined upper limit value of the differential pressure and the maximum value of the differential pressure is equal to or greater than the upper limit value, the static pressure in the main duct is reduced. An air volume control method comprising: a pressure reduction step.

In the air volume control method according to claim 6,
The step of increasing the static pressure in the main duct includes:
Increasing the static pressure in the main duct by increasing the set value of the static pressure in the main duct,
The step of reducing the static pressure in the main duct includes:
An air volume control method, wherein the static pressure in the main duct is reduced by reducing the set value of the static pressure in the main duct.

In the air volume control method according to claim 6,
The step of increasing the static pressure in the main duct includes:
Increase the static pressure in the main duct by increasing the inverter output value that adjusts the rotational speed of the fan attached to the main duct,
The step of reducing the static pressure in the main duct includes:
An air flow control method, wherein the static pressure in the main duct is reduced by reducing an inverter output value for adjusting a rotational speed of a fan attached to the main duct.

In the air volume control method according to claim 6,
The air flow control method, wherein the main duct is an air supply duct that forms a supply passage of conditioned air to the first to Nth control target spaces.

In the air volume control method according to claim 6,
The air flow control method, wherein the main duct is an exhaust duct that forms a discharge passage for conditioned air from the first to Nth control target spaces.