JP2753082B2 - Water distribution control device - Google Patents
Water distribution control deviceInfo
- Publication number
- JP2753082B2 JP2753082B2 JP28851789A JP28851789A JP2753082B2 JP 2753082 B2 JP2753082 B2 JP 2753082B2 JP 28851789 A JP28851789 A JP 28851789A JP 28851789 A JP28851789 A JP 28851789A JP 2753082 B2 JP2753082 B2 JP 2753082B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- water distribution
- amount
- control
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は、多点注入される配水施設において、そのう
ちの１か所（供給点）から供給される所定期間当りの配
水量を所定の契約水量に保持するために、供給点におけ
る契約水量をデマンド監視する配水量制御装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a water distribution facility in which multi-point injection is performed, and a distribution per predetermined period supplied from one of them (supply point). The present invention relates to a water distribution control device for demand-monitoring a contract water amount at a supply point in order to maintain a predetermined contract water amount.
（従来の技術） 一般に多点注入される配水施設においては、配水施設
の配水管網内の圧力を適正化し、安定かつ安全に水を供
給することが要求されている。(Prior Art) In general, in a water distribution facility that is injected at multiple points, it is required to optimize the pressure in a water distribution network of the water distribution facility and to supply water stably and safely.
このため、従来、配水管網内の圧力を検出し、この検
出圧力に応じて供給圧力制御して一定受水が行われてき
た。For this reason, conventionally, the pressure in the distribution pipe network has been detected, and the supply pressure has been controlled in accordance with the detected pressure to perform constant water reception.
（発明が解決しようとする課題） しかしながら、このような従来の配水施設の制御で
は、安定かつ安全な水供給を実現するために、全ての供
給点の供給圧力を制御していたが、配水流量は制御して
いなかった。そのため、ある特定の地点（供給点）の所
定期間当りの配水流量に制約が生じた場合、配水量を所
定の契約水量に制御することは、ほとんど不可能であっ
た。(Problems to be Solved by the Invention) However, in such conventional control of water distribution facilities, supply pressures at all supply points are controlled in order to realize stable and safe water supply. Had no control. Therefore, when there is a restriction on the flow rate of water at a specific point (supply point) per predetermined period, it has been almost impossible to control the water distribution amount to a predetermined contracted water amount.
そこで、本発明は、この点に鑑みてなされたもので、
１か所の供給点における所定期間当りの配水量を所定の
契約水量に制御する配水量制御装置を提供することを目
的としている。Therefore, the present invention has been made in view of this point,
It is an object of the present invention to provide a water distribution amount control device that controls a water distribution amount at a single supply point per predetermined period to a predetermined contracted water amount.
（課題を解決するための手段） 本発明は、多点注入される配水施設において供給点の
うちの１か所の供給点から供給される所定期間当りの配
水量を所定の契約水量に保持する配水量制御装置に関
し、とくに供給点に配設された制御弁、この供給点にお
ける配水量の制御を圧力制御モードと流量制御モードと
に所定期間の時間帯により切替えるタイミング、所定期
間当りの契約水量及び圧力制御モード時間帯における圧
力目標値を設定するデータ設定手段、このデータ設定手
段で設定された切替タイミング、所定期間当りの契約水
量及び圧力目標値ならびに供給点で検出された配水量、
配水圧力及び制御弁開度が入力される手段、さらに、こ
の入力手段から入力された配水量の実績を積算し、圧力
制御時間帯における積算された配水量実績と所定期間当
りの契約水量とから切替えられた流量制御モード時間帯
における配水予定値を演算し、かつ配水量実績の積算値
と配水予定値との差を監視し、この差が所定のしきい値
を越えたとき、この差を回復する流量目標値を新たに演
算する演算手段、切替えタイミング、圧力目標値及び流
量目標値ならびに配水量、配水圧力及び制御弁開度を入
力し、これらの制御値に応じて制御弁の開度を制御する
制御手段、とを備えた配水量制御装置に関する。(Means for Solving the Problems) In the present invention, in a water distribution facility in which multi-point injection is performed, the water distribution amount per predetermined period supplied from one of the supply points is maintained at a predetermined contracted water amount. A water distribution control device, in particular, a control valve disposed at a supply point, a timing for switching the control of a water distribution amount at this supply point between a pressure control mode and a flow rate control mode in a predetermined period of time, and a contracted water amount per predetermined period. And data setting means for setting a pressure target value in the pressure control mode time zone, the switching timing set by the data setting means, the contracted water amount and the pressure target value per predetermined period and the water distribution amount detected at the supply point,
The means for inputting the distribution pressure and the control valve opening, and further integrating the actual distribution amount input from this input means, and calculating the integrated distribution amount result in the pressure control time zone and the contracted water amount per predetermined period. Calculate the water distribution scheduled value in the switched flow control mode time zone, and monitor the difference between the integrated value of the actual water distribution amount and the water distribution scheduled value, and when this difference exceeds a predetermined threshold value, calculate this difference. Calculation means for newly calculating the flow rate target value to be recovered, switching timing, pressure target value and flow rate target value, water distribution amount, water distribution pressure and control valve opening are input, and the control valve opening is set according to these control values. And a control means for controlling the amount of water distribution.
（作用） このように構成された本発明の配水量制御装置では、
データ設定手段によって設定された圧力制御流量制御の
切替えタイミングにしたがって、まず制御モードを選定
する。流量制御モード時間帯では、演算装置により、所
定期間当りの契約水量と圧力制御モード時間帯中におけ
る配水量の積算値から流量制御モード時間帯中の配水予
定値を算出し、この配水予定値を保持できる流量目標値
を演算する。また、配水量実績の積算値と配水予定値と
の差が所定のしきい値を越え、そのために、流量制御モ
ード時間帯の最終時点で契約水量を保持できないと判定
された場合には、現時点から流量制御最終時点までの配
水予定値を再び演算し、配水予定値を保持できる流量目
標値を演算・設定する。さらに、この流量目標値を制御
手段に伝送して制御弁の開度を制御して、多点注入施設
の中で、１か所の供給点から供給する所定期間当りの配
水量が契約水量となるように制御する。(Operation) In the water distribution control device of the present invention configured as described above,
First, a control mode is selected according to the switching timing of the pressure control flow rate control set by the data setting means. In the flow control mode time zone, the arithmetic unit calculates a water distribution schedule value during the flow control mode time zone from the contracted water volume per predetermined period and the integrated value of the water distribution amount during the pressure control mode time zone, and calculates this water distribution schedule value. Calculate the target flow rate that can be held. If it is determined that the difference between the integrated value of the actual water distribution amount and the planned water distribution value exceeds a predetermined threshold value, and therefore the contract water amount cannot be held at the end of the flow control mode time zone, the current Calculate again the water distribution scheduled value from the time to the final point of flow control, and calculate and set the flow target value that can hold the water distribution planned value. Further, the flow rate target value is transmitted to the control means to control the degree of opening of the control valve, so that the amount of water supplied per predetermined period from one supply point in the multipoint injection facility is equal to the contracted water amount. Control so that
（実施例） 以下、本発明の配水量制御量の実施例を図面について
説明する。(Embodiment) Hereinafter, an embodiment of the water distribution amount control amount of the present invention will be described with reference to the drawings.
第１図は配水量制御装置の制御系統図を示し、配水施
設の配水管網４に対して、水の供給源Ａの配水池１から
配水ポンプ２と配水管３を介して、また水の供給源Ｂの
配水池５から配水管６と制御弁７を介して、それぞれ配
水されるようになっている。例えば、使用量（配水量）
の多い、昼間時には、供給源ＡとＢから、また使用量の
少ない夜間時には供給源Ｂから配水されるようになって
いる。供給源Ａの配水池１の配水ポンプ２の吐出側に
は、その吐出圧力を検出するポンプ吐出圧力検出器11
が、さらに配水管網４に配水される配水流量q1を検出す
る配水流量検出器12が配設されている。また、流量・圧
力制御モード切替えの対称となる供給源Ｂの配水管路中
に配設された制御弁７には、その１次側と２次側の圧力
を検出する制御弁１次圧力検出器16と制御弁２次圧力検
出器14が、さらに配水管網４へ配水される配水流量q2を
検出する配水流量検出器13がそれぞれ接続されている。
さらに、制御弁７には、その弁開度を検出する制御弁弁
開度検出器15が配設されている。FIG. 1 shows a control system diagram of the water distribution control device, in which a water distribution network 4 of a water distribution facility is supplied from a water reservoir 1 of a water supply source A via a water distribution pump 2 and a water distribution pipe 3 to a water distribution network. Water is distributed from the reservoir 5 of the supply source B via the water distribution pipe 6 and the control valve 7. For example, usage (water distribution)
Water is supplied from the supply sources A and B during the daytime when water is high, and from the supply source B during the nighttime when the amount of water used is small. The discharge side of the water distribution pump 2 of the reservoir 1 of the supply source A is provided with a pump discharge pressure detector 11 for detecting the discharge pressure.
But distributed water flow detector 12 for detecting is arranged distributed water flow q 1 being further distribution to distribution network 4. The control valve 7 disposed in the water distribution pipe of the supply source B, which is symmetrical to the flow / pressure control mode switching, has a control valve primary pressure detection for detecting the primary and secondary pressures thereof. vessel 16 and the control valve secondary pressure detector 14, distributed water flow detector 13 for detecting the distributed water flow q 2 being further distribution to distribution network 4 are connected.
Further, the control valve 7 is provided with a control valve opening detector 15 for detecting the valve opening.
一方、制御弁７側には、コントローラ27、テレメータ
（子局）26、テレメータ（親局）25及び入力装置22が互
いに接続して配設されていて、配水流量検出器13で検出
した配水管網４の配水流量q2、制御弁１次圧力検出器16
で検出した制御弁７の１次側圧力と制御弁２次圧力検出
器14で検出した制御弁７の２次側圧力ならびに制御弁開
度検出器15で検出した制御弁７の弁開度をコントーラ2
7、テレメータ（子局）26、テレメータ（親局）25、入
力装置22を経て演算装置23へ入力するようになってい
る。On the other hand, on the control valve 7 side, a controller 27, a telemeter (slave station) 26, a telemeter (master station) 25, and an input device 22 are arranged so as to be connected to each other. Network 4 water distribution flow q 2 , control valve primary pressure detector 16
The primary pressure of the control valve 7 detected in the above, the secondary pressure of the control valve 7 detected by the control valve secondary pressure detector 14, and the valve opening of the control valve 7 detected by the control valve opening detector 15 Controller 2
7. Input to the arithmetic unit 23 via the telemeter (slave station) 26, telemeter (master station) 25, and input device 22.
また、データ設定装置21では、マニュアルで配水管６
から配水される水の圧力制御と流量制御の制御モードの
切替えタイミングt1とt2、圧力制御目標値と契約水量Qs
を設定する。In the data setting device 21, the water distribution pipe 6 is manually set.
Switching timing t 1 and t 2 of the control mode of the pressure control and flow control of water distribution from the pressure control target value and contract water Qs
Set.
さらに、演算装置23は、契約水量デマンド監視手段23
aと流量目標演算手段23bとを備え、供給源Ｂの配水管６
から収集した入力装置22からの情報に基づいて契約水量
デマンド監視手段23aで契約水量のデマンド監視を行う
とともに、この監視手段23aで演算された配水予定を基
にして流量目標値演算手段23bで流量目標値の演算を行
う。Further, the arithmetic unit 23 includes a contract water demand monitoring means 23.
a and the flow target calculation means 23b,
The contract water amount demand monitoring means 23a monitors demand of the contract water amount based on the information collected from the input device 22 and the flow rate target value calculating means 23b based on the water distribution schedule calculated by the monitoring means 23a. Calculate the target value.
そして、これらの圧力制御切替えタイミングt1と流量
制御切替タイミングt2及び圧力目標値と流量目標値は、
演算装置23、出力装置24、テレメータ（親局）25、テレ
メータ（子局）26を経てコントローラ27へ伝送され、制
御弁７の目標弁開度を演算し、制御弁７の弁開度を制御
して制御弁７からの水の圧力と流量（配水流量）q2を制
御する。Then, these pressure control switching timing t 1 and the flow control switch timing t 2 and pressure target value and the flow rate target value,
It is transmitted to the controller 27 via the arithmetic unit 23, the output unit 24, the telemeter (master station) 25, and the telemeter (slave station) 26, calculates the target valve opening of the control valve 7, and controls the valve opening of the control valve 7. to then control the pressure and flow rate (distributed water flow) q 2 of water from the control valve 7.
ここで、演算装置23に内蔵された契約水量デマンド監
視機能と流量目標値演算機能のロジックを第２図と第３
図を参照して説明する。Here, the logics of the contract water demand monitoring function and the flow rate target value calculation function built in the calculation device 23 are shown in FIGS.
This will be described with reference to the drawings.
第２図において、（ａ）のグラフは配水管網４に配水
される配水流量Ｑ、（ｂ）のグラフは水の供給源Ａの配
水池１から配水される配水流量q1、（ｃ）のグラフは供
給源Ｂの配水池５から配水される配水流量q2の所定期
間、例えば１日の変化（t:1〜24時）をそれぞれ示して
いる。In FIG. 2, the graph (a) shows the distribution flow rate Q distributed to the distribution network 4, the graph (b) shows the distribution flow rate q 1 distributed from the reservoir 1 of the water supply source A, and (c). the graph predetermined period of distributed water flow q 2 from the distributing reservoir 5 is distributed water sources B, for example, a change in one day: shows a (t o'clock 1-24), respectively.
まず、供給源Ａと供給源Ｂから配水される配水量で契
約水量Qsを保持しなけらばならない場合について説明す
る。First, a case will be described in which the contract water amount Qs must be maintained at the water distribution amount distributed from the supply source A and the supply source B.
配水管網４に配水される配水流量Ｑは、 となる。The distribution flow rate Q distributed to the distribution network 4 is Becomes
圧力制御モード時間帯は、供給源Ｂからの配水時のみ
とすると、供給源Ｂの圧力制御モード時間帯における配
水量は、次のとおりとなる。Assuming that the pressure control mode time zone is only when water is supplied from the supply source B, the water distribution amount of the supply source B in the pressure control mode time zone is as follows.
しかし、この圧力制御モード時間帯では、前述したよ
うに、制御対象となるのは、供給源Ｂからの配水のみで
あるため、その流量を制限することができない。そのた
め契約水量Qsを保持するためには、契約水量Qsからこれ
らq3とq4の配水量を差引いた流量を流量制御モード時間
帯で調整する必要がある。 However, in this pressure control mode time zone, as described above, since only the water distribution from the supply source B is to be controlled, the flow rate cannot be limited. Therefore in order to hold the contract amount of water Qs, it is necessary to adjust the flow rate obtained by subtracting the water distribution amount of q 3 and q 4 from the contract amount of water Q s in the flow control mode time zone.
この調整する水量の総量は、次のとおりとなる。 The total amount of water to be adjusted is as follows.
そして、このQs−（q3＋q4）の流量を流量制御モード
時間帯で平均的に配分して配水管網への配水予定を決定
することになる。 Then, the flow rate of this Qs− (q 3 + q 4 ) is averagely distributed in the flow control mode time zone to determine the water distribution schedule to the water distribution network.
すなわち、この配水する流量目標値qrefは、 となる。That is, the target flow rate qref for water distribution is: Becomes
すなわち、流量制御モード時間帯の配水予定は、この
qrefの値を積分したものになる。この関係を図示したの
が第３図である。In other words, the water distribution schedule during the flow control mode
It is the integral of the value of qref. FIG. 3 illustrates this relationship.
したがって、この流量制御モード時間帯においては、
前記式（５）に示した流量目標値qrefの制御ができれ
ば、流量制御モード時間帯の最終時点で契約水量Qsの保
持が第３図（ｂ）に示すように可能となる。Therefore, in this flow control mode time zone,
If the flow rate target value qref shown in the equation (5) can be controlled, the contracted water amount Qs can be held at the final point in the flow rate control mode time zone as shown in FIG. 3 (b).
また、第２図（ａ），（ｂ）に示す時刻ta付近におい
て、配水流量Ｑが減少してきて現状の流量目標値qrefを
下回った場合について考察する。Further, a case where the water distribution flow rate Q decreases and falls below the current flow rate target value qref near the time ta shown in FIGS. 2 (a) and 2 (b) will be considered.
この場合、供給源Ａからの配水量がＯとなり、配水は
供給源Ｂからだけとなる。この場合は、第４図に示すよ
うに供給源Ｂからの配水の制御は、配水流量Ｑが流量目
標値qrefを越えるまで圧力制御し、配水流量が流量目標
値qrefを越えたら再び流量制御する。この場合、第４図
（ｄ）に示すように所定期間、例えば１日のうち時刻tb
までの積算配水量と契約水量との差を残り時間（t2−t
b）で、再度、平均的に配分して配水予定を作成し直
し、再び流量目標値を設定する。In this case, the water distribution amount from the supply source A is O, and the water distribution is only from the supply source B. In this case, as shown in FIG. 4, the water distribution from the supply source B is controlled until the distribution flow rate Q exceeds the flow rate target value qref, and when the distribution flow rate exceeds the flow rate target value qref, the flow control is performed again. . In this case, as shown in FIG.
The difference between the accumulated water distribution volume and the contracted water volume up to the remaining time (t 2 −t
In b), the water distribution schedule is re-created by averaging the distribution, and the flow target value is set again.
すなわち、時刻tbからの修正した流量目標値qref′
は、 となる。すなわち、時刻tbからt2までの配水予定は、時
刻tbからt2までの流量目標値qref′を積分したものとな
る。That is, the corrected flow target value qref ′ from time tb
Is Becomes That is, water distribution expected from time tb to t 2 is comprised of the time tb and the integral of the flow rate target value qref 'to t 2.
このようにして、流量制御時間帯における配水流量の
変化に対しても、供給源Ｂかの所定期間の配水流量を流
量制御モード時間帯の最終時点で契約水量Qsが保持でき
るよう制御することが可能となる。In this way, even when the distribution flow rate changes during the flow rate control time period, it is possible to control the distribution flow rate of the supply source B from the supply source B for a predetermined period so that the contract water amount Qs can be held at the end of the flow control mode time period. It becomes possible.
また、多点注入の配水施設において、１か所以上の供
給点で圧力制御を行っている供給源がある場合には、他
の供給源の配水量を先の実施例と同様に制御して契約水
量を保持することもできる。In addition, in a multi-point injection water distribution facility, when there is a supply source that performs pressure control at one or more supply points, the distribution amount of other supply sources is controlled in the same manner as in the previous embodiment. The contract water volume can be maintained.
本発明によれば、多点注入の配水施設において契約水
量を制御する供給源（本発明の実施例のものでは、供給
源Ｂ）からの配水の圧力制御モードと流量制御モードの
切替えを所定期間の時間帯の中で行うことができる。そ
して、流量制御モード時間帯においては、供給源の契約
水量のデマンド監視を行い、流量目標値を決定すること
により多点注入の配水施設の中の１か所の供給点におけ
る所定期間の配水量を契約水量に制御・保持することが
可能となる。According to the present invention, switching between the pressure control mode and the flow rate control mode of the water distribution from the supply source (the supply source B in the embodiment of the present invention) for controlling the contracted water amount in the multi-point injection distribution facility is performed for a predetermined period. It can be done during the time zone. Then, in the flow control mode time zone, demand monitoring of the contracted water amount of the supply source is performed, and the flow rate target value is determined to determine the water distribution amount at a single supply point in the multi-point injection distribution facility for a predetermined period. Can be controlled and maintained at the contracted water volume.
第１図は本発明の配水量制御装置の実施例の制御系統
図、第２図は本発明の配水制御装置が適用される多点注
入施設の各点における流量変化を示す図、第３図は配水
系の契約水量デマンド監視状態の説明図、第４図は供給
源からの配水流量目標値の変更状況の説明図である。 １……配水池（供給源Ａ）、２……配水ポンプ、３……
配水管、４……配水管網、５……配水池（供給源Ｂ）、
６……配水管、７……制御弁、11……ポンプ吐出圧力検
出器、12……配水流量検出器（供給源Ａ）、13……配水
流量検出器（供給源Ｂ）、14……制御弁２次圧力検出
器、15……制御弁弁開度検出器、16……制御弁１次圧力
検出器、21……データ設定装置、22……入力装置、23…
…演算装置、24……出力装置、25……テレメータ親局、
26……テレメータ子局、27……コントローラ。FIG. 1 is a control system diagram of an embodiment of a water distribution control device of the present invention, FIG. 2 is a diagram showing a flow rate change at each point of a multipoint injection facility to which the water distribution control device of the present invention is applied, FIG. Fig. 4 is an explanatory diagram of a contracted water demand monitoring state of a water distribution system, and Fig. 4 is an explanatory diagram of a change situation of a distribution water flow target value from a supply source. 1 ... Distribution reservoir (supply source A), 2 ... Distribution pump, 3 ...
Water distribution pipe, 4 ... distribution network, 5 ... reservoir (supply source B),
6 ... distribution pipe, 7 ... control valve, 11 ... pump discharge pressure detector, 12 ... distribution water flow rate detector (supply source A), 13 ... distribution water flow rate detector (supply source B), 14 ... Control valve secondary pressure detector, 15 ... Control valve opening degree detector, 16 ... Control valve primary pressure detector, 21 ... Data setting device, 22 ... Input device, 23 ...
… Calculator, 24… Output device, 25… Telemeter master station,
26: Telemeter slave station, 27: Controller.
Claims (1)
うちの１か所の供給点から供給される所定期間当りの配
水量を所定の契約水量に保持する配水量制御装置であっ
て、 前記供給点に配設された制御弁、 前記供給点における配水量の制御を圧力制御モードと流
量制御モードとに所定期間の時間帯により切替えるタイ
ミング、所定期間当りの契約水量及び圧力制御モード時
間帯における圧力目標値を設定するデータ設定手段、 前記データ設定手段で設定された切替タイミング、所定
時間当りの契約水量及び圧力目標値ならびに前記供給点
で検出された配水量、配水圧力及び制御弁開度が入力さ
れる手段、 前記入力手段から入力された前記配水量の実績を積算
し、圧力制御時間帯における積算された前記配水量実績
と前記所定期間当りの契約水量とから切替えられた流量
制御モード時間帯における配水予定値を演算し、かつ前
記配水量実績の積算値と配水予定値との差を監視し、該
差がしきい値を越えたとき、前記差を回復する流量目標
値を新たに演算する演算手段、 前記切替えタイミング、圧力目標値及び流量目標値なら
びに前記配水量、配水圧力及び制御弁開度を入力し、こ
れらの制御値に応じて前記制御弁の開度を制御する制御
手段、 とを備えた配水量制御装置。1. A water distribution amount control device for maintaining a distribution water amount per predetermined period supplied from one of supply points in a multi-point injection distribution facility at a predetermined contracted water amount, A control valve disposed at the supply point, a timing for switching the control of the water distribution amount at the supply point between the pressure control mode and the flow rate control mode in a predetermined period of time, a contract water amount per predetermined period, and a pressure control mode time period. Data setting means for setting a pressure target value in the above, switching timing set by the data setting means, contract water amount and pressure target value per predetermined time, and water distribution amount, water distribution pressure and control valve opening detected at the supply point A means for receiving the water distribution amount input from the input means, and integrating the water distribution amount result and the contract per the predetermined period in a pressure control time zone. Calculate the water distribution scheduled value in the flow control mode time zone switched from the water amount, and monitor the difference between the integrated value of the water distribution amount result and the water distribution scheduled value, and when the difference exceeds the threshold value, Calculating means for newly calculating a flow rate target value for recovering the difference, inputting the switching timing, the pressure target value and the flow rate target value, and the water distribution amount, the water distribution pressure and the control valve opening, and according to these control values, Control means for controlling the degree of opening of the control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28851789A JP2753082B2 (en) | 1989-11-06 | 1989-11-06 | Water distribution control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28851789A JP2753082B2 (en) | 1989-11-06 | 1989-11-06 | Water distribution control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03148711A JPH03148711A (en) | 1991-06-25 |
| JP2753082B2 true JP2753082B2 (en) | 1998-05-18 |
Family
ID=17731256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28851789A Expired - Lifetime JP2753082B2 (en) | 1989-11-06 | 1989-11-06 | Water distribution control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2753082B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728990A (en) * | 2013-11-25 | 2014-04-16 | 青岛盛嘉信息科技有限公司 | Automatic water temperature adjusting method |
| JP7067910B2 (en) * | 2017-12-12 | 2022-05-16 | 株式会社堀場エステック | Fluid system and program for fluid system |
-
1989
- 1989-11-06 JP JP28851789A patent/JP2753082B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03148711A (en) | 1991-06-25 |
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