JP2009031866A - Flow control valve and flow control method - Google Patents

Flow control valve and flow control method Download PDF

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Publication number
JP2009031866A
JP2009031866A JP2007192428A JP2007192428A JP2009031866A JP 2009031866 A JP2009031866 A JP 2009031866A JP 2007192428 A JP2007192428 A JP 2007192428A JP 2007192428 A JP2007192428 A JP 2007192428A JP 2009031866 A JP2009031866 A JP 2009031866A
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Prior art keywords
flow rate
flow
valve
air
opening
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Japanese (ja)
Inventor
Masafumi Takesako
雅史 竹迫
Atsushi Mizutaka
淳 水高
Dan Morita
暖 森田
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Azbil Corp
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Azbil Corp
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Priority to JP2007192428A priority Critical patent/JP2009031866A/en
Priority to CNA200810126531XA priority patent/CN101354801A/en
Priority to TW097125116A priority patent/TW200907619A/en
Priority to KR1020080067377A priority patent/KR20090010889A/en
Publication of JP2009031866A publication Critical patent/JP2009031866A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/01—Control of flow without auxiliary power
    • G05D7/0193—Control of flow without auxiliary power using hydraulic or pneumatic amplifiers, relays or transmitters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
    • F16K3/04—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with pivoted closure members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means

Abstract

<P>PROBLEM TO BE SOLVED: To properly control a flow rate of a fluid flowing through load equipment such as an air conditioner. <P>SOLUTION: This valve 8 has: a valve element 81 opening/closing a flow passage into which the fluid flows; a flow sensor 82 measuring the flow rate of the fluid passing the flow passage; a flow rate conversion part 83 converting an operation amount outputted from a controller into the flow rate; and an opening adjustment part 84 adjusting an opening of the valve element 81 such that the passage flow rate measured by the flow sensor 82 accords with the flow rate converted by the flow rate conversion part 83. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、空調制御システム等に使用される流量制御バルブ、および流量制御バルブにおける流量制御方法に関するものである。   The present invention relates to a flow rate control valve used in an air conditioning control system and the like, and a flow rate control method in the flow rate control valve.

従来、空調制御システムにおいて室内の温度制御もしくは湿度制御を行う際は、設定温度と室内温度との温度偏差もしくは設定湿度と室内湿度との湿度偏差に基づきＰＩＤ演算により操作量を決定し、この操作量によってバルブの開度を調節して、空調機に冷温水を供給していた（例えば特許文献１参照）。   Conventionally, when performing indoor temperature control or humidity control in an air conditioning control system, an operation amount is determined by PID calculation based on a temperature deviation between a set temperature and a room temperature or a humidity deviation between a set humidity and a room humidity. The opening of the valve is adjusted according to the amount, and cold / hot water is supplied to the air conditioner (see, for example, Patent Document 1).

特開平１１−２１１１９１号公報JP-A-11-2111191

従来の空調制御システムでは、空調負荷に見合った容量の空調機、配管、バルブが選定されずに、容量の大きい空調機、配管、バルブが選定されている場合、ＰＩＤ演算の操作量をそのまま用いてバルブの開度を調節すると、空調機に流れる冷温水の流量が過大になってしまうという問題点があった。そして、このような場合、過大な流量による過剰な制御（過剰冷房、過剰暖房）とその過剰な制御を抑制する制御とが交互に起こるハンチングが発生し、また過大な流量により、冷温水を生成する熱源機の運転効率が悪化するという問題点があった。なお、以上の問題点は、空調制御システムに限らず、バルブを用いて流体の流量を制御するシステムであれば同様に起こり得る。   In conventional air-conditioning control systems, if a large-capacity air conditioner, pipe, or valve is selected without selecting an air-conditioner, pipe, or valve that has a capacity that matches the air-conditioning load, the operation amount of PID calculation is used as it is. When the opening of the valve is adjusted, there is a problem that the flow rate of cold / hot water flowing through the air conditioner becomes excessive. In such a case, hunting occurs in which excessive control (excess cooling, excessive heating) due to excessive flow rate and control that suppresses excessive control occur alternately, and cold water is generated due to excessive flow rate. However, there was a problem that the operating efficiency of the heat source machine deteriorated. The above-described problems are not limited to the air conditioning control system, and may occur in the same manner as long as the system controls the flow rate of the fluid using a valve.

本発明は、上記課題を解決するためになされたもので、空調機等の負荷機器を流れる流体の流量を適切に調節することができる流量制御バルブおよび流量制御方法を提供することを目的とする。   The present invention has been made to solve the above-described problems, and an object thereof is to provide a flow rate control valve and a flow rate control method capable of appropriately adjusting the flow rate of a fluid flowing through a load device such as an air conditioner. .

本発明は、流体が流入する流路を開閉する弁体を備え、この弁体の開度に応じて前記流体の流量を調節可能な流量制御バルブであって、制御装置から出力された操作量を流量に換算する流量換算手段と、前記流路を通過する流体の流量を計測する流量計測手段と、この流量計測手段によって計測された通過流量が前記流量換算手段によって換算された流量と一致するように前記弁体の開度を調節する開度調節手段とを備えることを特徴とするものである。
また、本発明の流量制御方法は、制御装置から出力された操作量を流量に換算する流量換算手順と、前記流路を通過する流体の流量を計測する流量計測手順と、この流量計測手順によって計測された通過流量が前記流量換算手順によって換算された流量と一致するように前記弁体の開度を調節する開度調節手順とを備えることを特徴とするものである。 The present invention is a flow rate control valve that includes a valve body that opens and closes a flow path into which a fluid flows, and that can adjust the flow rate of the fluid in accordance with the opening of the valve body, and is an operation amount output from a control device The flow rate conversion means for converting the flow rate into the flow rate, the flow rate measurement means for measuring the flow rate of the fluid passing through the flow path, and the flow rate measured by the flow rate measurement means match the flow rate converted by the flow rate conversion means. As described above, it is provided with opening degree adjusting means for adjusting the opening degree of the valve body.
The flow rate control method of the present invention includes a flow rate conversion procedure for converting the operation amount output from the control device into a flow rate, a flow rate measurement procedure for measuring the flow rate of the fluid passing through the flow path, and the flow rate measurement procedure. An opening degree adjusting procedure for adjusting the opening degree of the valve body so that the measured passing flow rate matches the flow rate converted by the flow rate converting procedure.

本発明によれば、流量制御バルブが制御装置の操作量出力に見合った流量を演算し、計測した流体の通過流量が演算した流量と一致するように弁体の開度を調節することにより、空調機等の負荷機器を流れる流体の流量を適切に調節することができる。これにより、本発明では、過大な流量による制御のハンチングを劇的に改善することができる。また、本発明の流量制御バルブを空調制御に適用した場合には、冷温水（流体）を生成する熱源機の運転効率の悪化を劇的に改善することができる。   According to the present invention, the flow rate control valve calculates a flow rate corresponding to the operation amount output of the control device, and by adjusting the opening of the valve body so that the measured flow rate of the fluid matches the calculated flow rate, The flow rate of the fluid flowing through the load device such as an air conditioner can be appropriately adjusted. Thereby, in the present invention, hunting of control due to an excessive flow rate can be dramatically improved. Moreover, when the flow control valve of the present invention is applied to air conditioning control, it is possible to dramatically improve the deterioration of the operation efficiency of the heat source machine that generates cold / hot water (fluid).

以下、本発明の実施の形態について図面を参照して説明する。図１は本発明の実施の形態に係る空調制御システムの構成を示すブロック図である。
図１において、１は冷水や温水等の熱媒を生成する熱源機、２は熱源機１が生成する冷温水を搬送するポンプ、３は複数の熱源機１からの冷温水を混合する往ヘッダ、４は往水管路、５は往ヘッダ３から往水管路４を介して送られてくる冷温水の供給を受ける空調機、６は還水管路、７は空調機５において熱交換され還水管路６を介して送られてくる冷温水が戻される還ヘッダ、８は往ヘッダ３から空調機５に供給される冷温水の流量を制御するバルブ、９は空調機５から送り出された給気の温度を計測する給気温度センサ、１０は空調制御装置、１１は空調機５のコイル、１２は送風機である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an air conditioning control system according to an embodiment of the present invention.
In FIG. 1, 1 is a heat source device that generates a heat medium such as cold water or hot water, 2 is a pump that conveys cold / hot water generated by the heat source device 1, and 3 is a forward header that mixes cold / hot water from a plurality of heat source devices 1. Reference numeral 4 denotes an outgoing water line, 5 an air conditioner that receives supply of cold / warm water sent from the outgoing header 3 through the outgoing water line 4, 6 a return water pipe, and 7 a heat exchanger in the air conditioner 5 for heat exchange. A return header to which cold / hot water sent via the path 6 is returned, 8 is a valve for controlling the flow rate of cold / hot water supplied from the forward header 3 to the air conditioner 5, and 9 is an air supply sent from the air conditioner 5. An air supply temperature sensor for measuring the temperature of the air conditioner, 10 is an air conditioning control device, 11 is a coil of the air conditioner 5, and 12 is a blower.

ポンプ２により圧送され熱源機１により熱量が付加された熱媒は、往ヘッダ３において混合され、往水管路４を介して空調機５へ供給され、空調機５を通過して還水管路６により還水として還ヘッダ７に至り、再びポンプ２によって圧送される。このように、熱媒は以上の経路を循環する。例えば、熱源機１を冷凍機とした場合、熱媒は冷水であり、熱源機１を加熱機とした場合、熱媒は温水である。   The heat medium pumped by the pump 2 and added with the amount of heat by the heat source unit 1 is mixed in the forward header 3, supplied to the air conditioner 5 through the forward water line 4, passes through the air conditioner 5, and returns to the return water line 6. To return header 7 as return water and pumped again by pump 2. Thus, the heat medium circulates through the above path. For example, when the heat source device 1 is a refrigerator, the heat medium is cold water, and when the heat source device 1 is a heater, the heat medium is hot water.

空調機５は、空調制御エリアとなる室内から空調制御システムに戻る空気（還気）と外気との混合気を、冷温水が通過するコイル１１によって冷却または加熱し、冷却または加熱した給気を送風機１２によって空調制御エリアとなる室内に送り込む。   The air conditioner 5 cools or heats a mixture of air (return air) returning from the room serving as an air conditioning control area to the air conditioning control system and outside air by a coil 11 through which cold / hot water passes, and supplies the cooled or heated air supply. It sends into the room which becomes an air-conditioning control area with the air blower 12.

本実施の形態は、バルブ８が流量計測機能を備え、空調制御装置１０の操作量出力を受けて、この操作量出力に見合った流量を演算し、計測したバルブ通過流量が演算した流量と一致するように自身の開度を調節することを特徴としている。
図２はバルブ８の構成例を示すブロック図である。バルブ８は、空調機５を通過した冷温水が流入する流路を形成する弁箱８０と、流路を開閉する弁体８１と、流路を通過する冷温水の流量を計測する流量センサ（流量計測手段）８２と、空調制御装置１０から出力された操作量を流量に換算する流量換算部８３と、流量換算部８３が換算した流量値と流量センサ８２によって計測された流量値に基づいて弁体８１の開度を調節する開度調節部８４とを有する。
流量センサ８２の例としては、センサ部に流路抵抗を設け、流路前後圧力を計測して差圧から流量を演算する差圧式(オリフィス式等)流量センサや、挿入部の電磁場が流体の流れによって生じる偏差を検出する電磁式流量センサなどがある。 In the present embodiment, the valve 8 has a flow rate measurement function, receives an operation amount output of the air conditioning control device 10, calculates a flow rate corresponding to the operation amount output, and the measured valve passage flow rate matches the calculated flow rate. It is characterized by adjusting its own opening.
FIG. 2 is a block diagram showing a configuration example of the valve 8. The valve 8 includes a valve box 80 that forms a flow path through which the cold / hot water that has passed through the air conditioner 5 flows, a valve body 81 that opens and closes the flow path, and a flow rate sensor that measures the flow of cold / hot water that passes through the flow path ( A flow rate measuring means) 82, a flow rate conversion unit 83 that converts an operation amount output from the air conditioning control device 10 into a flow rate, a flow rate value converted by the flow rate conversion unit 83, and a flow rate value measured by the flow sensor 82. An opening degree adjusting unit 84 for adjusting the opening degree of the valve body 81.
Examples of the flow rate sensor 82 include a differential pressure type (orifice type) flow rate sensor in which a flow path resistance is provided in the sensor unit and a flow rate is calculated from the differential pressure by measuring the pressure before and after the flow path. There are electromagnetic flow sensors that detect deviations caused by flow.

以下、本実施の形態の空調制御システムの動作について説明する。図３は空調制御装置１０の動作を示すフローチャート、図４はバルブ８の動作を示すフローチャートである。
まず、空調制御装置１０は、給気温度センサ９によって計測された給気温度を示す給気温度信号を受信する（図３ステップＳ１）。 Hereinafter, the operation of the air conditioning control system of the present embodiment will be described. FIG. 3 is a flowchart showing the operation of the air conditioning control device 10, and FIG. 4 is a flowchart showing the operation of the valve 8.
First, the air-conditioning control device 10 receives a supply air temperature signal indicating the supply air temperature measured by the supply air temperature sensor 9 (step S1 in FIG. 3).

そして、空調制御装置１０は、給気温度センサ９によって計測された給気温度がオペレータ又は室内の居住者によって設定された温度設定値と一致するように空調機５を制御する。すなわち、空調制御装置１０は、温度設定値と給気温度との偏差に基づいて、例えばＰＩＤ演算によって操作量を算出し（ステップＳ２）、算出した操作量をバルブ８に出力する（ステップＳ３）。   And the air-conditioning control apparatus 10 controls the air conditioner 5 so that the supply air temperature measured by the supply air temperature sensor 9 may correspond with the temperature setting value set by the operator or the resident in the room. That is, the air conditioning control device 10 calculates an operation amount by, for example, PID calculation based on the deviation between the temperature set value and the supply air temperature (step S2), and outputs the calculated operation amount to the valve 8 (step S3). .

以上のような図３に示す処理が、空調制御システムが動作停止するまで（図３ステップＳ４においてＹＥＳ）、繰り返し行われる。
なお、湿度センサ（不図示）によって給気の湿度を計測し、空調制御装置１０が湿度設定値と現在の給気湿度との偏差に基づいて操作量を算出するようにしてもよい。 The process shown in FIG. 3 as described above is repeated until the air conditioning control system stops operating (YES in step S4 in FIG. 3).
The humidity of the supply air may be measured by a humidity sensor (not shown), and the air conditioning control device 10 may calculate the operation amount based on the deviation between the humidity setting value and the current supply air humidity.

一方、バルブ８の流量換算部８３は、空調制御装置１０から出力された操作量を示す操作量信号を受信する（図４ステップＳ１０）。そして、流量換算部８３は、受信した操作量を流量値に換算する（ステップＳ１１）。流量換算部８３の内部には、図５に示すような操作量と流量との関係が例えばテーブルや数式の形で予め登録されている。流量換算部８３は、この予め登録された関係に基づいて操作量から流量を演算する。
空調機５等の負荷機器の設計最大流量は、バルブ８が組み込まれる負荷機器の容量、空調をする空間の負荷容量から計算される。この設計最大流量値を操作量１００％に割り当てる。そして、操作量と負荷機器の設計流量との関係を示す関数（流量特性）が図５に示すような直線的な関係にあるものとし、前記設計最大流量値と操作量が０％のときの流量値０とを用いて関数を求め、この関数を流量換算部８３内の記憶部に予め登録しておけばよい。 On the other hand, the flow rate conversion unit 83 of the valve 8 receives an operation amount signal indicating the operation amount output from the air conditioning control device 10 (step S10 in FIG. 4). Then, the flow rate conversion unit 83 converts the received operation amount into a flow rate value (step S11). In the flow rate conversion unit 83, the relationship between the operation amount and the flow rate as shown in FIG. 5 is registered in advance in the form of a table or a mathematical expression, for example. The flow rate conversion unit 83 calculates the flow rate from the manipulated variable based on the previously registered relationship.
The design maximum flow rate of the load equipment such as the air conditioner 5 is calculated from the capacity of the load equipment in which the valve 8 is incorporated and the load capacity of the space for air conditioning. This design maximum flow rate value is assigned to an operation amount of 100%. A function (flow rate characteristic) indicating the relationship between the operation amount and the design flow rate of the load device is assumed to have a linear relationship as shown in FIG. 5, and the design maximum flow rate value and the operation amount are 0%. A function is obtained using the flow rate value 0, and this function may be registered in the storage unit in the flow rate conversion unit 83 in advance.

バルブ８の流量センサ８２は、流路を通過する冷温水の流量（バルブ通過流量）を計測し、開度調節部８４は、流量センサ８２によって計測されたバルブ通過流量を示す流量信号を受信する（ステップＳ１２）。そして、開度調節部８４は、流量センサ８２によって計測されたバルブ通過流量の値が流量換算部８３によって換算された流量値と一致するように弁体８１の開度を調節する（ステップＳ１３）。
以上のような図４に示す処理が、空調制御システムが動作停止するまで（図４ステップＳ１４においてＹＥＳ）、繰り返し行われる。 The flow rate sensor 82 of the valve 8 measures the flow rate of cold / hot water passing through the flow path (valve passage flow rate), and the opening degree adjusting unit 84 receives a flow rate signal indicating the valve passage flow rate measured by the flow rate sensor 82. (Step S12). Then, the opening degree adjustment unit 84 adjusts the opening degree of the valve body 81 so that the value of the valve passage flow rate measured by the flow rate sensor 82 matches the flow rate value converted by the flow rate conversion unit 83 (step S13). .
The process shown in FIG. 4 as described above is repeated until the air conditioning control system stops operating (YES in step S14 in FIG. 4).

こうして、本実施の形態では、バルブ８が空調制御装置１０の操作量出力に見合った流量を演算し、計測したバルブ通過流量が演算した流量と一致するように弁体８１の開度を自身で調節することにより、空調機５を流れる冷温水の流量を適切に調節することができる。これにより、本実施の形態では、過大な流量による制御のハンチングと熱源機１の運転効率の悪化を劇的に改善することができ、より良い空調制御を行うことができる。   Thus, in the present embodiment, the valve 8 calculates the flow rate corresponding to the operation amount output of the air conditioning control device 10, and the opening degree of the valve element 81 is adjusted by itself so that the measured valve passage flow rate matches the calculated flow rate. By adjusting, the flow volume of the cold / hot water which flows through the air conditioner 5 can be adjusted appropriately. Thereby, in this Embodiment, the hunting of the control by an excessive flow volume and the deterioration of the operating efficiency of the heat source unit 1 can be improved dramatically, and better air conditioning control can be performed.

なお、本実施の形態で説明した空調制御装置１０は、ＣＰＵ、記憶装置およびインタフェースを備えたコンピュータとこれらのハードウェア資源を制御するプログラムによって実現することができる。同様に、バルブ８の流量換算部８３と開度調節部８４とは、コンピュータとプログラムによって実現することができる。これらのコンピュータのＣＰＵは、それぞれの記憶装置に格納されたプログラムに従って、実施の形態で説明した処理を実行する。   In addition, the air-conditioning control apparatus 10 demonstrated by this Embodiment is realizable by the computer provided with CPU, a memory | storage device, and an interface, and the program which controls these hardware resources. Similarly, the flow rate conversion unit 83 and the opening degree adjustment unit 84 of the valve 8 can be realized by a computer and a program. The CPUs of these computers execute the processes described in the embodiments in accordance with programs stored in the respective storage devices.

また、本実施の形態では、流量制御バルブの適用例として空調制御システムを例に挙げて説明したが、これに限るものではなく、流量制御バルブを用いて流体の流量を制御するシステムであれば同様に適用することができる。   In this embodiment, an air conditioning control system has been described as an example of application of the flow control valve. However, the present invention is not limited to this, and any system that controls the flow rate of fluid using the flow control valve may be used. The same can be applied.

本発明は、流量制御バルブに適用することができる。   The present invention can be applied to a flow control valve.

本発明の実施の形態に係る空調制御システムの構成を示すブロック図である。It is a block diagram which shows the structure of the air-conditioning control system which concerns on embodiment of this invention. 図１の空調制御システムにおけるバルブの構成例を示すブロック図である。It is a block diagram which shows the structural example of the valve | bulb in the air-conditioning control system of FIG. 図１の空調制御システムにおける空調制御装置の動作を示すフローチャートである。It is a flowchart which shows operation | movement of the air-conditioning control apparatus in the air-conditioning control system of FIG. 図１の空調制御システムにおけるバルブの動作を示すフローチャートである。It is a flowchart which shows the operation | movement of the valve | bulb in the air-conditioning control system of FIG. 本発明の実施の形態において操作量と流量との関係の１例を示す図である。It is a figure which shows one example of the relationship between the operation amount and the flow volume in embodiment of this invention.

符号の説明Explanation of symbols

１…熱源機、２…ポンプ、３…往ヘッダ、４…往水管路、５…空調機、６…還水管路、７…還ヘッダ、８…バルブ、９…給気温度センサ、１０…空調制御装置、１１…コイル、１２…送風機、８０…弁箱、８１…弁体、８２…流量センサ、８３…流量換算部、８４…開度調節部。   DESCRIPTION OF SYMBOLS 1 ... Heat source machine, 2 ... Pump, 3 ... Outflow header, 4 ... Outbound pipe line, 5 ... Air conditioning machine, 6 ... Return water line, 7 ... Return header, 8 ... Valve, 9 ... Supply air temperature sensor, 10 ... Air conditioning Control device, 11 ... coil, 12 ... blower, 80 ... valve box, 81 ... valve body, 82 ... flow rate sensor, 83 ... flow rate conversion unit, 84 ... opening degree adjustment unit.

Claims (2)

流体が流入する流路を開閉する弁体を備え、この弁体の開度に応じて前記流体の流量を調節可能な流量制御バルブであって、
制御装置から出力された操作量を流量に換算する流量換算手段と、
前記流路を通過する流体の流量を計測する流量計測手段と、
この流量計測手段によって計測された通過流量が前記流量換算手段によって換算された流量と一致するように前記弁体の開度を調節する開度調節手段とを備えることを特徴とする流量制御バルブ。 A flow control valve comprising a valve body for opening and closing a flow path into which a fluid flows, and capable of adjusting the flow rate of the fluid according to the opening of the valve body,
Flow rate conversion means for converting the operation amount output from the control device into a flow rate;
Flow rate measuring means for measuring the flow rate of the fluid passing through the flow path;
A flow rate control valve comprising: an opening degree adjusting unit that adjusts an opening degree of the valve body so that a passing flow rate measured by the flow rate measuring unit matches a flow rate converted by the flow rate converting unit. 流体が流入する流路を開閉する弁体を備えた流量制御バルブにおいて、前記弁体の開度を調節することにより前記流体の流量を制御する流量制御方法であって、
制御装置から出力された操作量を流量に換算する流量換算手順と、
前記流路を通過する流体の流量を計測する流量計測手順と、
この流量計測手順によって計測された通過流量が前記流量換算手順によって換算された流量と一致するように前記弁体の開度を調節する開度調節手順とを備えることを特徴とする流量制御方法。 In a flow control valve provided with a valve body for opening and closing a flow path into which a fluid flows, a flow control method for controlling the flow rate of the fluid by adjusting the opening of the valve body,
A flow rate conversion procedure for converting the operation amount output from the control device into a flow rate;
A flow rate measurement procedure for measuring the flow rate of the fluid passing through the flow path;
A flow rate control method comprising: an opening degree adjustment procedure for adjusting an opening degree of the valve body so that a passage flow rate measured by the flow rate measurement procedure matches a flow rate converted by the flow rate conversion procedure.
JP2007192428A 2007-07-24 2007-07-24 Flow control valve and flow control method Pending JP2009031866A (en)

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