JP3533430B2 - Variable speed water supply - Google Patents
Variable speed water supplyInfo
- Publication number
- JP3533430B2 JP3533430B2 JP2003045189A JP2003045189A JP3533430B2 JP 3533430 B2 JP3533430 B2 JP 3533430B2 JP 2003045189 A JP2003045189 A JP 2003045189A JP 2003045189 A JP2003045189 A JP 2003045189A JP 3533430 B2 JP3533430 B2 JP 3533430B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- pump
- inflow
- discharge
- variable speed
- 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.)
- Expired - Lifetime
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- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は可変速給水装置に係
り、特に配水管から加圧ポンプを介して直接末端給水機
器へと連結された、いわゆる直結型の可変速給水装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable speed water supply system, and more particularly to a so-called direct connection type variable speed water supply system in which a water distribution pipe is directly connected to an end water supply system via a pressure pump.
【０００２】[0002]
【従来の技術】図１は、直結型可変速給水装置のシステ
ム概要を示す。例えば、水道の本管である配水管１１に
は流入管１２が接続され、加圧ポンプ１３がこの流入管
に接続されている。流入管１２には、量水器１５と流入
側圧力タンク１６とが接続されている。加圧ポンプ１３
の吐出側には、末端給水機器１７へと連結された吐出管
１８が接続されている。吐出管１８には、フロースイッ
チ１９、吐出側圧力タンク２０等が接続されている。2. Description of the Related Art FIG. 1 shows a system outline of a direct connection type variable speed water supply system. For example, an inflow pipe 12 is connected to a water distribution pipe 11 which is a main water pipe, and a pressurizing pump 13 is connected to the inflow pipe. A water meter 15 and an inflow side pressure tank 16 are connected to the inflow pipe 12. Pressure pump 13
A discharge pipe 18 connected to the terminal water supply device 17 is connected to the discharge side of the. A flow switch 19, a discharge side pressure tank 20 and the like are connected to the discharge pipe 18.
【０００３】フロースイッチ１９は、流量を検出するス
イッチであり、特に少水量であることが検出されるとポ
ンプの締切運転を防止するため、ポンプの運転を停止す
る、いわゆる少水量停止動作を行う。加圧ポンプ１３の
流入側には流入圧力検出器２１が接続されており、加圧
ポンプ１３の流入側の圧力を検出し、その信号を制御部
２２に送る。同様に、加圧ポンプ１３の吐出側には吐出
圧力検出器２３が備えられ、吐出側の圧力信号を制御部
２２に送る。The flow switch 19 is a switch for detecting the flow rate, and particularly when a small amount of water is detected, the flow switch 19 performs a so-called small water amount stop operation for stopping the operation of the pump in order to prevent a shutoff operation of the pump. . An inflow pressure detector 21 is connected to the inflow side of the pressurizing pump 13, detects the pressure on the inflow side of the pressurizing pump 13, and sends a signal thereof to the control unit 22. Similarly, a discharge pressure detector 23 is provided on the discharge side of the pressurizing pump 13, and sends a pressure signal on the discharge side to the control unit 22.
【０００４】ポンプ１３は、三相２００Ｖの商用電源に
接続された周波数・電圧変換装置（インバータ）を備え
た電動機２５（可変速手段）により可変速で駆動され
る。制御部２２は、流入圧力検出器２１及び吐出圧力検
出器２３の信号に基づき、可変速手段２５に信号を送
り、ポンプ１３の回転数を任意の速度に加速又は減速制
御する。The pump 13 is driven at a variable speed by an electric motor 25 (variable speed means) equipped with a frequency / voltage converter (inverter) connected to a three-phase 200V commercial power source. The control unit 22 sends a signal to the variable speed means 25 based on the signals from the inflow pressure detector 21 and the discharge pressure detector 23 to control the rotation speed of the pump 13 to an arbitrary speed.
【０００５】特開平５−１１８２８０号公報、特開平５
−２６３４４４号公報、特開平５−２４０１８６号公報
等によれば、加圧ポンプの吐出側の圧力を一定に保つこ
とにより、末端給水機器へ所定の圧力の水を常に供給で
きるようにポンプの速度を増減する技術が開示されてい
る。又、配水管に水圧の低下をきたさないように、ポン
プの流入側圧力が低下した際には、ポンプの速度を減速
する、又は停止することにより、配水管側の圧力の低下
を防止する技術等が開示されている。Japanese Unexamined Patent Publication Nos. 5-118280 and 5
According to Japanese Patent Application Laid-Open No. 263444/1993 and Japanese Patent Application Laid-Open No. 5-240186, the speed of the pump is kept constant so as to constantly supply water of a predetermined pressure to the terminal water supply equipment. A technique for increasing or decreasing the is disclosed. Further, in order to prevent the water pressure from decreasing in the water distribution pipe, when the pressure on the inflow side of the pump decreases, the speed of the pump is reduced or stopped to prevent the pressure decrease on the water distribution pipe side. Etc. are disclosed.
【０００６】係る直結型の可変速給水装置においては、
従来の配水管に貯水槽を接続し、貯水槽に貯えられた水
を加圧ポンプを用いて末端給水機器へ分配するのと比較
して、種々のメリットがある。そのメリットは、貯水槽
を設けないため、給水装置を全体として小型化でき、又
設置面積を小さくできる。水が貯留されないので、衛生
上好ましい。配水管の水圧をそのまま加圧ポンプの吸込
側に利用できるため、加圧ポンプの揚程が低くなり、そ
の分省エネルギー化ができる等である。In such a direct connection type variable speed water supply device,
There are various merits as compared with the conventional method of connecting a water storage tank to a water distribution pipe and distributing the water stored in the water storage tank to the terminal water supply equipment by using a pressure pump. The merit is that since the water tank is not provided, the water supply device can be downsized as a whole and the installation area can be reduced. It is preferable for hygiene because water is not stored. Since the water pressure of the water distribution pipe can be used as it is on the suction side of the pressurizing pump, the head of the pressurizing pump is lowered, and energy can be saved accordingly.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、従来の
直結型以前の給水装置では貯水槽が設けられていたた
め、加圧ポンプの流入側はほぼゼロの圧力に保たれ、ポ
ンプ流入側の圧力が直結型のように上昇するということ
がなかった。従来の可変速給水装置の運転制御に用いら
れているパラメータは、このような貯水装置を設け流入
圧力がほぼゼロの時に定めたものが、多数の経験により
蓄積されていた。しかしながら、直結型の可変速給水装
置においては、流入側の圧力が常に配水管の水圧に影響
されるので、従来のポンプの運転制御のパラメータをそ
のまま用いると、各種の不都合があった。However, since the conventional direct connection type water supply apparatus was provided with the water tank, the pressure side of the pressurizing pump was maintained at almost zero pressure, and the pressure of the pump inflow side was directly connected. It didn't rise like a mold. The parameters used for the operation control of the conventional variable speed water supply device are set when such a water storage device is provided and when the inflow pressure is substantially zero, but they have been accumulated by many experiences. However, in the direct connection type variable speed water supply device, the pressure on the inflow side is always affected by the water pressure of the water distribution pipe, and therefore there are various inconveniences if the conventional parameters for controlling the operation of the pump are used as they are.
【０００８】例えば、少水量であることを流量検出器が
検出し、一旦ポンプの運転速度をあらかじめ定めた比較
的高い運転速度で一定時間運転し圧力タンクに蓄圧した
後ポンプを停止する少水量停止動作を行う場合がある。
従来は、タンクに蓄圧運転する際に、流入側圧力がほぼ
ゼロであるということを前提として、ポンプの運転速度
が定められていた。しかしながら、直結型給水装置のよ
うにポンプの流入圧力が変動すると、タンクへ蓄圧する
ポンプの運転速度が流入圧力がゼロであることを前提と
したものであると、ポンプの流入圧力の分だけ吐出圧力
が高くなるため、蓄圧値が上昇するという問題があっ
た。For example, the flow rate detector detects that the amount of water is small, temporarily operates the pump at a relatively high operating speed for a certain period of time, accumulates pressure in the pressure tank, and then stops the pump. May take action.
Heretofore, the operating speed of the pump has been set on the assumption that the pressure on the inflow side is almost zero when the pressure is stored in the tank. However, if the inflow pressure of the pump fluctuates as in the direct connection type water supply device, if the operating speed of the pump that accumulates pressure in the tank is based on the assumption that the inflow pressure is zero, the discharge amount will be equal to the inflow pressure of the pump. Since the pressure increases, there is a problem that the accumulated pressure value increases.
【０００９】また、並列運転可能な２台のポンプを備え
た可変速給水装置では、一台のポンプで水量が賄えなく
なると、もう一台の予備のポンプを追加投入して並列に
運転する。この追加投入のタイミングを、吐出圧力一定
の運転を行いつつ、運転速度が、流入圧力がゼロの時の
ポンプの定格速度に達した時とすると、流入圧力が高く
なると、ポンプが過負荷になるという問題がある。これ
は、ポンプの揚程特性から、設定の吐出圧力定格運転速
度となるには、大水量側に動作点が移行するためであ
る。Further, in a variable speed water supply apparatus having two pumps which can be operated in parallel, when one pump cannot supply water, another spare pump is additionally supplied to operate in parallel. . If the operation speed reaches the rated speed of the pump when the inflow pressure is zero while the discharge pressure is constant, the pump is overloaded when the inflow pressure becomes high. There is a problem. This is because the operating point shifts to the large water volume side to reach the set discharge pressure rated operating speed from the pump head characteristics.
【００１０】また、２台のポンプが並列運転中に、流入
圧力が高くなる或いは負荷水量が低下すると、１台のポ
ンプで間に合うため、１台のポンプを解列離脱させる必
要がある。この解列離脱のタイミングを、流入圧力がゼ
ロの時のある運転速度とすると、流入圧力が変動すると
解列したとたんに追加するインチング動作が起こるとい
う不具合があった。又流入圧力が低くなると解列する水
量が少水量側へ変化する。従って、一台で運転できる水
量になっているにもかかわらず解列せずに２台運転のま
ま継続する場合があり、エネルギーの無駄であった。
又、更に解列する水量が少水量側へ変化し、水量ゼロで
も解列せずに、締切運転によりポンプが加熱するという
不具合もあった。Further, if the inflow pressure becomes high or the load water amount decreases while the two pumps are operating in parallel, one pump will be in time, so it is necessary to disengage one pump. If the timing of the disconnection disconnection is set to a certain operating speed when the inflow pressure is zero, there is a problem that an inching operation to be added occurs as soon as the inflow pressure fluctuates. Further, when the inflow pressure becomes low, the amount of water that breaks off changes to a small amount. Therefore, even if the amount of water that can be operated by one unit is used, there is a case where two units continue to operate without disconnecting, which was a waste of energy.
In addition, there was a problem that the amount of water to be disconnected changed to a smaller amount, and even if the amount of water was zero, the water was not disconnected and the pump was heated by the shutoff operation.
【００１１】本発明は、上述した事情に鑑みて為された
もので、直結型可変速給水装置において、ポンプの流入
圧力が変動しても安定な動作を行うことができる可変速
給水装置を提供することを目的とする。The present invention has been made in view of the above circumstances, and provides a variable speed water supply apparatus in a direct connection type variable speed water supply apparatus which can perform stable operation even if the inflow pressure of the pump fluctuates. The purpose is to do.
【００１２】[0012]
【課題を解決するための手段】上述した目的を達成する
ため、本発明の第１の態様は、配水管に接続された流入
管と、この流入管に接続された加圧ポンプと、この加圧
ポンプの吐出側に接続された吐出管と、前記流入管に設
けられた加圧ポンプの流入圧力を検出する流入圧力検出
器と、前記吐出管に設けられた加圧ポンプの吐出圧力を
検出する吐出圧力検出器と、前記加圧ポンプを可変速駆
動する可変速駆動手段と、前記ポンプを制御する制御手
段とを備え、該制御手段は、流入圧力を用いて少水量停
止動作時の前記加圧ポンプの運転制御をすることを特徴
とする。In order to achieve the above-mentioned object, the first aspect of the present invention is to provide an inflow pipe connected to a water distribution pipe, a pressurizing pump connected to the inflow pipe, and an addition pipe. A discharge pipe connected to the discharge side of the pressure pump, an inflow pressure detector for detecting the inflow pressure of the pressure pump provided in the inflow pipe, and a discharge pressure of the pressure pump provided in the discharge pipe A discharge pressure detector, a variable speed drive means for driving the pressurizing pump at a variable speed, and a control means for controlling the pump, wherein the control means uses the inflow pressure to stop the small amount of water. It is characterized in that the operation of the pressurizing pump is controlled.
【００１３】本発明の一態様によれば、前記少水量停止
動作は前記吐出管に設けられた圧力タンクに蓄圧する蓄
圧運転を含む。本発明の一態様によれば、前記制御手段
は流入圧力を用いて前記蓄圧運転時の前記加圧ポンプの
運転速度を補正する。本発明の一態様によれば、前記蓄
圧運転は流入圧力を用いて補正された運転速度により所
定の時間行われる。本発明の一態様によれば、前記制御
手段は流入圧力がゼロの時の前記加圧ポンプの運転パラ
メータを前記流入圧力検出器で検出されたポンプ流入圧
力を用いて補正することで前記加圧ポンプを運転制御す
る。According to one aspect of the present invention, the small water amount stopping operation includes a pressure accumulating operation for accumulating pressure in a pressure tank provided in the discharge pipe. According to one aspect of the invention, the control means
Is the inflow pressure of the pressurizing pump during the pressure accumulation operation.
Correct the driving speed. According to one aspect of the invention, the storage
Pressure operation depends on the operating speed corrected using the inflow pressure.
It is held for a fixed time. According to an aspect of the present invention, the control means corrects the operating parameter of the pressurizing pump when the inflow pressure is zero by using the pump inflow pressure detected by the inflow pressure detector to perform the pressurization. Operate the pump.
【００１４】本発明の第２の態様は、配水管に接続され
た流入管と、この流入管に接続された加圧ポンプと、こ
の加圧ポンプの吐出側に接続された吐出管と、前記流入
管に設けられた加圧ポンプの流入圧力を検出する流入圧
力検出器と、前記吐出管に設けられた加圧ポンプの吐出
圧力を検出する吐出圧力検出器と、前記吐出管に設けら
れた圧力タンクと、前記加圧ポンプを可変速駆動する可
変速駆動手段と、前記ポンプを制御する制御手段とを備
え、前記制御手段は前記加圧ポンプの運転パラメータを
前記流入圧力検出器で検出されたポンプ流入圧力を用い
て補正することで少水量停止動作時の前記加圧ポンプの
運転制御をすることを特徴とする。本発明の一態様によ
れば、前記少水量停止動作は、前記加圧ポンプの少水量
を検知すると、前記圧力タンクに蓄圧して前記加圧ポン
プを停止させる。本発明の一態様によれば、前記制御手
段は前記圧力タンクに蓄圧するときに前記流入圧力検出
器で検出されたポンプ流入圧力を用いて前記加圧ポンプ
の運転速度を補正する。 According to a second aspect of the present invention, an inflow pipe connected to the water distribution pipe, a pressurizing pump connected to the inflow pipe, a discharge pipe connected to a discharge side of the pressurizing pump, An inflow pressure detector for detecting the inflow pressure of a pressure pump provided in the inflow pipe, a discharge pressure detector for detecting the discharge pressure of the pressure pump provided in the discharge pipe, and a discharge pressure detector provided in the discharge pipe A pressure tank, a variable speed drive means for driving the pressurizing pump at a variable speed, and a control means for controlling the pump are provided, and the control means detects operating parameters of the pressurizing pump by the inflow pressure detector. It is characterized in that the operation of the pressurizing pump at the time of the small water amount stop operation is controlled by making a correction using the pump inflow pressure. According to an aspect of the present invention, the small water amount stopping operation accumulates pressure in the pressure tank and stops the pressure pump when the small amount of water of the pressure pump is detected. According to one aspect of the invention, the control hand
The stage detects the inflow pressure when accumulating pressure in the pressure tank.
Pump using the pump inlet pressure detected by the
Correct the driving speed of.
【００１５】本発明の第３の態様は、配水管に接続され
た流入管と、この流入管に接続された加圧ポンプと、こ
の加圧ポンプの吐出側に接続された吐出管と、前記流入
管に設けられた加圧ポンプの流入圧力を検出する流入圧
力検出器と、前記吐出管に設けられた加圧ポンプの吐出
圧力を検出する吐出圧力検出器と、前記吐出管に設けら
れた圧力タンクと、前記加圧ポンプを可変速駆動する可
変速駆動手段と、前記ポンプを制御する制御手段とを備
え、該制御手段は、少水量時は前記圧力タンクに蓄圧し
た状態で前記加圧ポンプを停止し、この少水量停止動作
時に流入圧力を用いて前記加圧ポンプの運転制御をする
ことを特徴とする。 A third aspect of the present invention is connected to a water pipe.
The inflow pipe and the pressure pump connected to the inflow pipe,
The discharge pipe connected to the discharge side of the pressure pump of
Inflow pressure to detect the inflow pressure of the pressure pump installed in the pipe
Discharge of force detector and pressure pump installed in the discharge pipe
A discharge pressure detector for detecting the pressure and a discharge pressure detector installed on the discharge pipe.
The pressure tank and the pressure pump can be driven at variable speeds.
A variable speed drive means and a control means for controlling the pump are provided.
The control means accumulates pressure in the pressure tank when the amount of water is small.
Stop the pressurizing pump in the state of
Sometimes the inflow pressure is used to control the operation of the pressure pump.
It is characterized by
【００１６】本発明の好ましい態様は、配水管に接続さ
れた流入管と、この流入管に接続された加圧ポンプと、
この加圧ポンプの吐出側に接続され末端給水機器へと連
結された吐出管と、前記流入管に設けられた加圧ポンプ
の流入圧力を検出する流入圧力検出器と、前記吐出管に
設けられた加圧ポンプの吐出圧力を検出する吐出圧力検
出器と、前記加圧ポンプを可変速駆動する可変速駆動手
段と、前記ポンプを制御する制御手段とを備え、該制御
手段は、前記ポンプの運転を制御するパラメータを、前
記流入圧力検出器で検出されたポンプ流入圧力に応じて
補正して、該補正されたパラメータに基づいて運転制御
する。In a preferred aspect of the present invention, an inflow pipe connected to the water distribution pipe, a pressurizing pump connected to the inflow pipe,
A discharge pipe connected to the discharge side of the pressurizing pump and connected to the terminal water supply device, an inflow pressure detector for detecting the inflow pressure of the pressurizing pump provided in the inflow pipe, and the discharge pipe provided in the discharge pipe. A discharge pressure detector for detecting the discharge pressure of the pressurizing pump, a variable speed drive means for driving the pressurizing pump at a variable speed, and a control means for controlling the pump. A parameter for controlling the operation is corrected according to the pump inflow pressure detected by the inflow pressure detector, and the operation is controlled based on the corrected parameter.
【００１７】また、前記ポンプ流入圧力に応じたパラメ
ータの補正は、前記流入圧力値がゼロにおけるポンプの
任意の運転速度Ｖと締切圧力Ｐo との関係式
Ｐo ＝Ｆ（Ｖ）
を基本とし、前記流入圧力値がゼロにおけるポンプの運
転を制御するパラメータＶn を、流入圧力Ｐｓに応じて
式
Ｖn′＝（（Ｆ（Ｖn ）−Ｐs ）／Ｆ（Ｖn ））１／２
×Ｖn
で補正した。The correction of the parameter according to the pump inflow pressure is based on the relational expression Po = F (V) between the arbitrary operating speed V of the pump and the shutoff pressure Po when the inflow pressure value is zero. The parameter Vn for controlling the operation of the pump when the inflow pressure value is zero is expressed by the formula Vn '= ((F (Vn) -Ps) / F (Vn)) 1/2 according to the inflow pressure Ps.
Corrected by × Vn.
【００１８】また、前記ポンプの運転を制御する補正さ
れたパラメータＶn′は、ポンプの少水量停止時の制御
に用いられるもので、少水量時であることが流量検出器
から検出されたならば、前記流入圧力値がゼロにおける
少水量蓄圧時の運転速度Ｖnを、前記式に従って補正し
た速度Ｖn′で一定時間加圧運転する。The corrected parameter Vn 'for controlling the operation of the pump is used for controlling the pump when a small amount of water is stopped, and if the flow rate detector detects that the amount of water is small. The operation speed Vn when the small amount of water is accumulated when the inflow pressure value is zero is pressurized at a speed Vn 'corrected according to the above formula for a certain period of time.
【００１９】また、前記ポンプの運転を制御する補正さ
れたパラメータＶn′は、２台のポンプの並列運転を行
う際に、運転中の１台のポンプに対して２台目のポンプ
を追加投入する際に用いられるもので、前記流入圧力値
がゼロにおけるポンプ追加投入の設定速度Ｖn を、前記
式に従って補正した速度Ｖn′に達したならば２台目の
ポンプを追加投入させる。Further, the corrected parameter Vn 'for controlling the operation of the pump is such that when the two pumps are operated in parallel, the second pump is additionally supplied to the one pump in operation. When the set speed Vn of the additional pump input at the inflow pressure value of zero reaches the speed Vn 'corrected by the above equation, the second pump is additionally input.
【００２０】また、前記ポンプの運転を制御する補正さ
れたパラメータＶn′は、前記２台のポンプが並列運転
しており、そのうちの１台のポンプを解列する際に、前
記流入圧力値がゼロにおけるポンプ解列の設定速度Ｖn
を、前記式に従って補正した速度Ｖn′で解列を行う。The corrected parameter Vn 'for controlling the operation of the pumps is such that when the two pumps are operating in parallel and one of them is disconnected, the inflow pressure value is Set speed Vn of pump disconnection at zero
Is performed at the speed Vn 'corrected according to the above equation.
【００２１】流入圧力がゼロの時のポンプの運転制御の
パラメータを、流入圧力検出器で検出されたポンプ流入
圧力に応じて補正して、その補正されたパラメータに基
づいて運転制御することから、直結型の可変速給水装置
において、ポンプの流入圧力が変動しても、適切なパラ
メータのもとで運転制御を行うことができる。The parameters of the operation control of the pump when the inflow pressure is zero are corrected according to the pump inflow pressure detected by the inflow pressure detector, and the operation control is performed based on the corrected parameters. In the direct connection type variable speed water supply device, even if the inflow pressure of the pump fluctuates, the operation control can be performed under appropriate parameters.
【００２２】一般的にポンプの締切圧力は、ポンプの回
転速度の二乗に比例する。従って、ポンプの運転速度Ｖ
と締切圧力Ｐo との関係式
Ｐo ＝Ｆ（Ｖ）
を基本とし、流入圧力値がゼロにおけるポンプの運転を
制御するパラメータＶnを、式
Ｖn′＝（（Ｆ（Ｖn）−Ｐｓ）／Ｆ（Ｖn））１／２×
Ｖn
で補正することにより、流入圧力Ｐs が存在するときに
補正されたパラメータＶn ′で運転することができる。Generally, the shutoff pressure of a pump is proportional to the square of the rotational speed of the pump. Therefore, the pump operating speed V
Based on the relational expression Po = F (V) between the dead pressure and the dead pressure Po, the parameter Vn for controlling the operation of the pump at the inflow pressure value of zero is expressed by the expression Vn '= ((F (Vn) -Ps) / F ( Vn)) 1/2 ×
By correcting with Vn, it is possible to operate with the corrected parameter Vn 'when the inflow pressure Ps is present.
【００２３】少水量停止時の蓄圧運転速度Ｖn を、前記
式に従って補正した速度Ｖn′で運転することから、吐
出側圧力が極端に上昇することを防止することができ
る。Since the pressure-accumulation operating speed Vn when the small amount of water is stopped is operated at the speed Vn 'corrected according to the above equation, the discharge side pressure can be prevented from rising extremely.
【００２４】２台のポンプの並列運転を行う際に、運転
中の１台のポンプに対して２台目のポンプを追加投入す
る際に、追加投入に用いられる運転速度Ｖn′を、流入
圧力を考慮した式に基づいて補正することから、適切な
負荷のもとで２台目のポンプの追加投入を行うことがで
きる。これによりポンプの過負荷を避けることができ
る。When two pumps are operated in parallel, when the second pump is additionally charged to the one pump in operation, the operating speed Vn 'used for the additional charge is set to the inflow pressure. Since the correction is performed based on the equation that takes into consideration, it is possible to add the second pump additionally under an appropriate load. This avoids overloading the pump.
【００２５】２台のポンプが並列運転しており、そのう
ちの１台のポンプを解列する際に、流入圧力値がゼロに
おけるポンプの解列の設定速度Ｖn を、前記式により補
正した速度Ｖn′で解列を行うことから、ポンプのイン
チング動作等を防止することができ、適切なポンプの解
列を行うことができる。Two pumps are operating in parallel, and when one of the pumps is disconnected, the set speed Vn of the disconnection of the pump when the inflow pressure value is zero is corrected by the above formula Vn. Since the disconnection is performed at ′, the inching operation of the pump can be prevented, and the appropriate disconnection of the pump can be performed.
【００２６】[0026]
【発明の実施の形態】以下、本発明のの実施の形態及び
実施例について添付図面を参照しながら説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments and examples of the present invention will be described below with reference to the accompanying drawings.
【００２７】本発明においても、配水管１１に加圧ポン
プ１３が直結され、末端給水機器１７に配水管１１から
貯水槽を介することなく直結給水するシステム構成は図
１に示すとおりである。そして、加圧ポンプ１３は吐出
圧力検出器２３の信号により、末端給水機器１７への供
給水圧が一定となるようにインバータ等の可変速手段２
５でポンプ回転速度を増減する吐出圧力制御が行われ
る。また、流入圧力が低下した場合に、配水管に悪影響
を及ぼさないように、一定の流入設定圧力値以下になる
と、可変速手段２５でポンプ回転速度を減少する、又は
停止する流入圧力制御が行われる。そして、吐出圧力制
御は流入圧力Ｐs が選択設定圧力以下になった時に流入
圧力制御に切り換えられる。Also in the present invention, the system configuration in which the pressurizing pump 13 is directly connected to the water distribution pipe 11 and the water is directly connected to the terminal water supply device 17 from the water distribution pipe 11 without using the water storage tank is as shown in FIG. Then, the pressurizing pump 13 receives the signal from the discharge pressure detector 23 so that the water supply pressure to the terminal water supply device 17 becomes constant and the variable speed means 2 such as an inverter is used.
At 5, the discharge pressure control for increasing or decreasing the pump rotation speed is performed. Further, when the inflow pressure is reduced, when the inflow pressure falls below a certain inflow set pressure value so as not to adversely affect the water distribution pipe, the inflow pressure control for reducing or stopping the pump rotation speed by the variable speed means 25 is performed. Be seen. Then, the discharge pressure control is switched to the inflow pressure control when the inflow pressure Ps becomes equal to or lower than the selected set pressure.
【００２８】図２は、本発明の可変速給水装置の制御部
分の構成を示す。制御部２２には、流入圧力検出器２１
から加圧ポンプ１３の流入側の圧力Ｐs が入力され、吐
出圧力検出器２３から加圧ポンプ１３の吐出側の圧力Ｐ
d が入力される。設定圧力Ｐ1 は、吐出圧力の制御目標
値であり、通常２〜３ｋｇ／ｃｍ２ に設定される。設
定圧力Ｐ2 は、流入圧力Ｐs の制御目標値であり、こ
の目標設定圧力は、配水管に悪影響を及ぼさないよう
に、通常１ｋｇ／ｃｍ２ 程度に設定される。設定圧力
Ｐ3 は、流入圧力制御と吐出圧力制御の選択用の設定圧
力値であり、流入圧力検出器の流入圧力Ｐs が低下し
て、配水管に悪影響を及ぼす恐れが生じた場合に、吐出
圧力制御から、流入圧力制御に切替えるためのものであ
る。制御部２２は、流入圧力Ｐs 、吐出圧力Ｐd 、の値
に応じて、ポンプ１３を加速または減速する速度指令を
可変速駆動手段（インバータ）２５に与える。FIG. 2 shows the configuration of the control portion of the variable speed water supply system of the present invention. The control unit 22 includes an inflow pressure detector 21.
The pressure Ps on the inflow side of the pressure pump 13 is input from the discharge pressure detector 23 and the pressure Ps on the discharge side of the pressure pump 13 from the discharge pressure detector 23.
d is entered. The set pressure P1 is a control target value of the discharge pressure, and is usually set to 2-3 kg / cm 2 . The set pressure P2 is the inflow pressure Ps The target set pressure is normally set to about 1 kg / cm 2 so as not to adversely affect the water distribution pipe. The set pressure P3 is a set pressure value for selecting the inflow pressure control and the discharge pressure control, and the inflow pressure Ps of the inflow pressure detector is set. This is for switching from the discharge pressure control to the inflow pressure control when there is a risk of adversely affecting the water distribution pipe. The control unit 22 gives a speed command for accelerating or decelerating the pump 13 to the variable speed drive means (inverter) 25 according to the values of the inflow pressure Ps and the discharge pressure Pd.
【００２９】制御部２２には、ポンプの運転を制御する
各種のパラメータが入力される。これは、少水量停止動
作における蓄圧時の運転速度、ポンプ２台並列運転のた
めの追加投入時の運転速度、ポンプ２台並列運転から１
台を解列離脱させる時の運転速度等である。これらの運
転速度は、流入圧力値がゼロである場合の運転速度が入
力される。Various parameters for controlling the operation of the pump are input to the control unit 22. This is 1 from the operating speed at the time of pressure accumulation in the small water volume stop operation, the operating speed at the time of additional injection for parallel operation of 2 pumps, and the parallel operation of 2 pumps.
It is the operating speed when the platform is disengaged. For these operating speeds, operating speeds when the inflow pressure value is zero are input.
【００３０】図３は、本発明の一実施例の制御部のブロ
ック図を示す。流入圧力がゼロの時のポンプ運転制御に
関するパラメータ、例えば運転速度Ｖn を、ポンプが流
入圧力Ｐs を受けた後に必要なポンプ運転速度Ｖn′に
補正しながら運転制御を行うようになっている。即ち、
制御部２２には、締切圧力の演算装置３１を備えてい
る。締切圧力の演算装置３１は、それぞれのポンプの固
有の特性から流入圧力値がゼロにおけるポンプの任意の
運転速度Ｖと締切圧力の関係式を記憶しており、ポンプ
の運転速度Ｖn に対してその締切圧力Ｐo を算定する。
この関係式
Ｐo ＝Ｆ（Ｖn）
は、実際の速度Ｖn に対応した締切圧力Ｐo を記憶装置
に記憶させておいて、任意の速度Ｖn を未知数としてＰ
o を返すサブルーチンであってもよく、また両者の関係
を近似した計算式として持っていても良い。FIG. 3 shows a block diagram of a control unit according to an embodiment of the present invention. A parameter relating to the pump operation control when the inflow pressure is zero, for example, the operation speed Vn is corrected while the pump receives the inflow pressure Ps to the required pump operation speed Vn 'to perform the operation control. That is,
The control unit 22 is provided with a shutoff pressure calculation device 31. The shutoff pressure calculation device 31 stores the relational expression between the arbitrary operating speed V of the pump and the shutoff pressure when the inflow pressure value is zero, based on the characteristic peculiar to each pump, and the relational expression for the operating speed Vn Calculate the deadline pressure Po.
This relational expression Po = F (Vn) is obtained by storing a shutoff pressure Po corresponding to the actual speed Vn in a storage device and setting an arbitrary speed Vn as an unknown value P.
It may be a subroutine that returns o, or it may have a relation between the two as an approximate calculation formula.
【００３１】次に制御部２２は、締切圧力の演算結果Ｆ
（Ｖn）と流入圧力Ｐs に基づいてパラメータを補正す
る演算を行う演算装置３２を備えている。この速度補正
の演算式は、
Ｖn′＝（（Ｆ（Ｖn ）−Ｐs ）／Ｆ（Ｖn ））１／２
×Ｖn
である。一般的にポンプでは、締切圧力はポンプ回転速
度の二乗に比例する。従って、締切圧力Ｆ（Ｖn）から
流入圧力Ｐs の差分の割合の平方根を、流入圧力値がゼ
ロの場合の運転速度Ｖn に乗ずることにより、流入圧力
Ｐs 時の補正値として運転速度Ｖn′を得ることができ
る。そしてこの補正された速度Ｖn′によりポンプの運
転制御を行うことにより、流入圧力がゼロである場合の
各種パラメータを用いて、流入圧力Ｐs に応じた補正に
より適切なポンプの運転制御を行うことができる。Next, the control unit 22 controls the calculation result F of the shutoff pressure.
The calculation device 32 is provided to perform calculation for correcting the parameter based on (Vn) and the inflow pressure Ps. The calculation formula for this speed correction is: Vn '= ((F (Vn) -Ps) / F (Vn)) 1/2
× Vn. Generally, in a pump, the cutoff pressure is proportional to the square of the pump rotation speed. Therefore, by multiplying the square root of the ratio of the difference between the dead pressure F (Vn) and the inflow pressure Ps by the operating speed Vn when the inflow pressure value is zero, the operating speed Vn 'is obtained as the correction value at the inflow pressure Ps. be able to. By controlling the pump operation at the corrected speed Vn ', various parameters when the inflow pressure is zero can be used to perform appropriate pump operation control by correction according to the inflow pressure Ps. it can.
【００３２】ポンプを吐出圧力一定に速度制御してい
て、末端給水機器側で水を使わなくなり、水量がほぼゼ
ロとなった場合に、ポンプが締切運転となる。ポンプの
締切運転を継続すると、ポンプは発熱するので停止させ
る必要があり、いわゆる少水量停止動作に入る。ポンプ
の再起動の条件は吐出圧力が目標吐出圧力を下回ったと
きであるが、少水量の検出でそのままポンプを停止させ
ると、すぐに吐出圧力が目標吐出圧力を下回り、ポンプ
が頻繁に起動停止を繰り返すこととなる。このため、少
水量であることが検出されたならば、ポンプを停止する
直前にポンプの回転速度を上げ、目標吐出圧力よりも若
干高い圧力で吐出側圧力タンクに蓄圧してからポンプを
停止する。こうすると、水が多少使われても圧力が目標
吐出圧力まで落ちてくるのに時間がかかるため、ポンプ
の停止時間を稼げる。このときに蓄圧時の運転速度が高
すぎると、末端給水機器側の圧力変動が大きくなるた
め、流入圧力がほぼゼロである場合に設定された運転速
度のままであると、流入圧力が直結型の場合に変動する
ことから、末端給水機器側に極端に大きな圧力がかかる
恐れがある。When the speed of the pump is controlled to a constant discharge pressure, water is no longer used on the terminal water supply equipment side, and when the amount of water becomes almost zero, the pump operates in a shutoff mode. If the pump shutoff operation is continued, the pump will generate heat, so it must be stopped, and the so-called small water amount stop operation starts. The condition for restarting the pump is when the discharge pressure falls below the target discharge pressure.However, if the pump is stopped as it is when a small amount of water is detected, the discharge pressure immediately falls below the target discharge pressure and the pump frequently starts and stops. Will be repeated. Therefore, if it is detected that the amount of water is small, the rotational speed of the pump is increased immediately before the pump is stopped, and the pump is stopped after accumulating the discharge side pressure tank at a pressure slightly higher than the target discharge pressure. . In this way, even if some water is used, it takes time for the pressure to drop to the target discharge pressure, so that the pump can be stopped for a long time. At this time, if the operating speed during pressure accumulation is too high, pressure fluctuations on the terminal water supply equipment side will increase, so if the operating speed remains set when the inflow pressure is almost zero, the inflow pressure will be directly In this case, there is a possibility that extremely large pressure will be applied to the terminal water supply equipment side.
【００３３】図４は、少水量停止動作のフローを示す。
少水量が検出されたならば、締切圧力Ｐo の算定を行
う。これはポンプ固有の特性から流入圧力がゼロである
時の少水量停止動作時の蓄圧運転速度Ｖn に対応した締
切圧力Ｐo を算定する。そして次に流入圧力Ｐs を読み
込む。そして流入圧力Ｐs により補正された蓄圧動作時
の運転速度Ｖn′の演算を演算装置３２の式、
Ｖn′＝（（Ｆ（Ｖn ）−Ｐs ）／Ｆ（Ｖn ））１／２
×Ｖn
に基づいて行う。そして求められた運転速度Ｖn′によ
り所定の時間、蓄圧運転を行う。蓄圧運転が終了したな
らばポンプを停止する。FIG. 4 shows a flow of the operation for stopping a small amount of water.
If a small amount of water is detected, the shutoff pressure Po is calculated. This calculates the shutoff pressure Po corresponding to the accumulator operating speed Vn at the time of the small water flow stop operation when the inflow pressure is zero from the characteristics peculiar to the pump. Then, the inflow pressure Ps is read. Then, the operation speed Vn 'during the pressure accumulating operation corrected by the inflow pressure Ps is calculated by the equation of the operation device 32: Vn' = ((F (Vn) -Ps) / F (Vn)) 1/2
XVn. Then, the pressure accumulating operation is performed for a predetermined time at the obtained operation speed Vn '. When the pressure accumulation operation is completed, stop the pump.
【００３４】このように本発明においては少水量停止動
作に際して、流入圧力Ｐs に応じて適切に蓄圧時の運転
速度Ｖn を補正してＶn′に低くするため、流入圧力Ｐs
が上昇しても蓄圧運転時の吐出圧力が極端に高くなる
不具合を生じない。As described above, according to the present invention, when the operation of stopping a small amount of water is performed, the operating speed Vn during pressure accumulation is appropriately corrected and lowered to Vn 'in accordance with the inflow pressure Ps.
Does not cause a problem that the discharge pressure during the pressure accumulating operation becomes extremely high even if is increased.
【００３５】追加投入時の運転速度とは、２台のポンプ
の並列運転を行う際に、運転中の１台のポンプに対し
て、負荷水量が増大した場合に徐々に運転速度が上昇し
て、定格速度に達すると、２台目のポンプを追加投入す
る。その際の速度であり、流入圧力値がゼロにおける、
即ち従来技術における貯水槽を設けた場合のポンプ追加
投入の設定速度がＶn である。The operating speed at the time of additional charging means that, when two pumps are operated in parallel, the operating speed is gradually increased when the amount of load water increases with respect to one operating pump. , When the rated speed is reached, add the second pump. It is the speed at that time, when the inflow pressure value is zero,
That is, the set speed of the additional pump input when the water tank of the prior art is provided is Vn.
【００３６】図５は、２台目のポンプの追加投入の制御
フローを示す。まず、ポンプの運転速度Ｖn を読み込
む。このＶn は流入圧力がゼロである時の２台目ポンプ
の追加投入を行う速度である。流入圧力がゼロである時
の運転速度Ｖn に対応した締切圧力Ｐo を算定する。そ
して次に流入圧力Ｐs を読み込む。そして流入圧力Ｐs
により補正された追加投入時の運転速度Ｖn′の演算を
演算装置３２の式、
Ｖn′＝（（Ｆ（Ｖn ）−Ｐs ）／Ｆ（Ｖn ））１／２
×Ｖn
に基づいて行う。そして求められた運転速度Ｖn′に１
台目のポンプが達したならば、２台目のポンプの追加投
入を行う。FIG. 5 shows a control flow for additionally charging the second pump. First, the operating speed Vn of the pump is read. This Vn is the speed at which the second pump is additionally charged when the inflow pressure is zero. The shutoff pressure Po corresponding to the operating speed Vn when the inflow pressure is zero is calculated. Then, the inflow pressure Ps is read. And inflow pressure Ps
The calculation of the operating speed Vn 'at the time of additional injection corrected by the formula of the calculation device 32 is: Vn' = ((F (Vn) -Ps) / F (Vn)) 1/2
XVn. Then, the calculated operating speed Vn 'is 1
When the second pump reaches, add the second pump.
【００３７】このように本発明においては２台目ポンプ
の追加投入に際して、流入圧力Ｐsに応じて適切に運転
速度Ｖn を補正してＶn′にするため、流入圧力Ｐs が
上昇してもポンプが過負荷になるという不具合を生じな
い。As described above, in the present invention, when the second pump is additionally charged, the operating speed Vn is appropriately corrected to Vn 'in accordance with the inflow pressure Ps, so that the pump will operate even if the inflow pressure Ps rises. The problem of overload does not occur.
【００３８】解列離脱時の運転速度Ｖn とは、前述のよ
うに２台のポンプが並列運転しており、そのうちの１台
のポンプを解列離脱させる際の速度である。Ｖn は、流
入圧力値がゼロにおける、即ち従来技術における貯水槽
を設けた場合のポンプ解列離脱時の設定速度である。The operating speed Vn during disconnection is the speed at which one of the two pumps operates in parallel as described above, and one of them is disconnected. Vn is a set speed when the inflow pressure value is zero, that is, when the water tank of the related art is provided and when the pump is disconnected from the pump.
【００３９】図６は、２台運転時のポンプから１台を解
列離脱させる制御フローを示す。まずポンプの運転速度
Ｖn を読み込む。このＶn は、流入圧力がゼロである時
のポンプ解列離脱の速度である。そして、流入圧力がゼ
ロである時の１台のポンプを解列させる運転速度Ｖn に
対応した締切圧力Ｐo を算定する。そして次に流入圧力
Ｐs を読み込む。そして流入圧力Ｐs により補正された
解列動作時の運転速度Ｖn′の演算を演算装置３２の
式、
Ｖn′＝（（Ｆ（Ｖn ）−Ｐs ）／Ｆ（Ｖn ））１／２
×Ｖn
に基づいて行う。そして求められた運転速度Ｖn′に達
したならば２台並列運転のポンプの１台を解列離脱させ
る。FIG. 6 shows a control flow for disconnecting one pump from the pump when two pumps are in operation. First, the operating speed Vn of the pump is read. This Vn is the rate of pump disconnection when the inflow pressure is zero. Then, the shutoff pressure Po corresponding to the operating speed Vn for disconnecting one pump when the inflow pressure is zero is calculated. Then, the inflow pressure Ps is read. Then, the operation speed Vn 'during the parallel disconnection operation corrected by the inflow pressure Ps is calculated by the equation of the operation device 32: Vn' = ((F (Vn) -Ps) / F (Vn)) 1/2
XVn. When the calculated operating speed Vn 'is reached, one of the two pumps operated in parallel is disengaged.
【００４０】このように本発明においては２台並列運転
のポンプの１台を解列するに際して、流入圧力Ｐs に応
じて適切に運転速度Ｖn を補正してＶn′にするため、
流入圧力Ｐs が変動しても、追加と解列が頻繁に起こる
インチング動作が発生する等の不具合を生じない。As described above, in the present invention, when one of the two pumps operating in parallel is disconnected, the operating speed Vn is appropriately corrected to Vn 'in accordance with the inflow pressure Ps.
Even if the inflow pressure Ps fluctuates, a problem such as an inching operation in which addition and disconnection frequently occur does not occur.
【００４１】[0041]
【実施例】次に、本発明の一実施例の追加・解列動作に
ついて説明する。１台運転時のポンプのフロースイッチ
が「開」の状態（水が流れている状態）で、運転速度が
ポンプの最大速度Ｖｎ’(ｍａｘ)に達して３秒間継続し
たら、２台目ポンプの追加投入を行う。ここで１台目ポ
ンプの最大速度Ｖｎ’(ｍａｘ)は、流入圧力がゼロの時
の最大速度Ｖｎ(ｍａｘ)、及び切換時の流入圧力Ｐｓに
対して、
Ｖｎ’(ｍａｘ)＝（（Ｆ（Ｖｎ(ｍａｘ)）−Ｐｓ）／Ｆ
（Ｖｎ(ｍａｘ)））１／ ２× Ｖｎ(ｍａｘ)
の演算により換算したものである。Next, the adding / disconnecting operation of the embodiment of the present invention will be described. When the flow switch of the pump during one unit operation is in the "open" state (the state where water is flowing) and the operating speed reaches the maximum speed Vn '(max) of the pump and continues for 3 seconds, the second pump Perform additional input. Here, the maximum speed Vn ′ (max) of the first pump is Vn ′ (max) = ((FF) with respect to the maximum speed Vn (max) when the inflow pressure is zero and the inflow pressure Ps at the time of switching. (Vn (max))-Ps) / F
(Vn (max))) is obtained by converting the operation of the 1/2 × Vn (max) .
【００４２】２台目ポンプを追加投入すると、１台目ポ
ンプは最大速度の９５％の速度（例えば最大速度を６０
Ｈｚとすると５７Ｈｚ）に固定し、２台目ポンプを可変
速運転する。ここで９５％の速度Ｖｎ’(９５％)は、流
入圧力がゼロの時の最大速度Ｖｎ(９５％)、及び切換時
の流入圧力Ｐｓに対して、
Ｖｎ’(９５％)＝（（Ｆ（Ｖｎ(９５％)）−Ｐｓ）／Ｆ
（Ｖｎ(９５％)））１／ ２× Ｖｎ(９５％)
の演算により換算したものである。When the second pump is additionally charged, the first pump is at a speed of 95% of the maximum speed (for example, the maximum speed is 60%).
The frequency is fixed at 57 Hz), and the second pump is operated at a variable speed. Here, the 95% speed Vn ′ (95%) is Vn ′ (95%) = ((FF) with respect to the maximum speed Vn (95%) when the inflow pressure is zero and the inflow pressure Ps at the time of switching. (Vn (95%))-Ps) / F
(Vn (95%))) is obtained by converting the operation of the 1/2 × Vn (95% ).
【００４３】更に使用水量が増加して２台目ポンプの運
転速度が最大速度Ｖｎ’(ｍａｘ)に達したら、１台目ポ
ンプと２台目ポンプとを同一速度で運転する揃速運転に
切換る。ここで２台目ポンプの最大速度Ｖｎ’(ｍａｘ)
は、流入圧力がゼロの時の最大速度Ｖｎ(ｍａｘ)、及び
切換時の流入圧力Ｐｓに対して、
Ｖｎ’(ｍａｘ)＝（（Ｆ（Ｖｎ(ｍａｘ)）−Ｐｓ）／Ｆ
（Ｖｎ(ｍａｘ)））１／ ２× Ｖｎ(ｍａｘ)
の演算により換算したものである。When the amount of water used further increases and the operating speed of the second pump reaches the maximum speed Vn '(max), switching to the uniform speed operation in which the first pump and the second pump are operated at the same speed It Here, the maximum speed Vn '(max) of the second pump
Is Vn '(max) = ((F (Vn (max))-Ps) / F with respect to the maximum speed Vn (max) when the inflow pressure is zero and the inflow pressure Ps at the time of switching.
(Vn (max))) is obtained by converting the operation of the 1/2 × Vn (max) .
【００４４】その後、使用水量が減少して揃速運転時の
運転速度が最大速度の９２％（例えば最大速度を６０Ｈ
ｚとすると５５Ｈｚ）に達したならば、１台目ポンプの
運転速度を９５％の速度に固定し、２台目ポンプが可変
速運転となる。ここで９５％の速度Ｖｎ’(９５％)は、
流入圧力がゼロの時の９５％速度Ｖｎ(９５％)、及び切
換時の流入圧力Ｐｓに対して、
Ｖｎ’(９５％)＝（（Ｆ（Ｖｎ(９５％)）−Ｐｓ）／Ｆ
（Ｖｎ(９５％)））１／ ２× Ｖｎ(９５％)
の演算により換算したものである。After that, the amount of water used decreases and the operating speed during uniform speed operation is 92% of the maximum speed (for example, the maximum speed is 60H).
If it reaches 55 Hz), the operating speed of the first pump is fixed at 95% and the second pump operates at a variable speed. Here, 95% speed Vn '(95%) is
With respect to the 95% speed Vn (95%) when the inflow pressure is zero and the inflow pressure Ps at the time of switching, Vn ′ (95%) = ((F (Vn (95%)) − Ps) / F
(Vn (95%))) is obtained by converting the operation of the 1/2 × Vn (95% ).
【００４５】更に使用水量が減少して可変速運転中の２
台目ポンプのスロースイッチが「閉」（少水量状態）と
なり、その状態が３秒間経過したならば、２台目ポンプ
を解列離脱させ、１台目ポンプを可変速運転する。When the amount of water used is further reduced, the
When the slow switch of the first pump is "closed" (small amount of water) and the state has passed for 3 seconds, the second pump is disengaged and the first pump is operated at a variable speed.
【００４６】尚、以上に説明した２台目ポンプの追加・
解列動作は、本発明を適用した一実施例に過ぎないもの
である。２台の可変速ポンプを備えたいわゆる直結型の
給水装置においては、本発明の趣旨を逸脱することなく
様々な変形実施例が可能であることは云うまでもないこ
とである。The addition of the second pump described above
The disconnecting operation is only one example to which the present invention is applied. It goes without saying that various modifications can be made to the so-called direct connection type water supply device provided with two variable speed pumps without departing from the spirit of the present invention.
【００４７】[0047]
【発明の効果】本発明によれば、直結型可変速給水装置
において、ポンプの流入圧力が変動しても安定な動作を
行うことができる。即ち、流入圧力が上昇しても、補正
により適切な運転が行え末端給水機器への過度の水圧上
昇等が防止でき、又、ポンプの省エネルギー運転が行え
る。According to the present invention, in the direct connection type variable speed water supply apparatus, stable operation can be performed even if the inflow pressure of the pump fluctuates. That is, even if the inflow pressure rises, an appropriate operation can be performed by the correction so that an excessive rise in water pressure to the terminal water supply equipment can be prevented, and energy-saving operation of the pump can be performed.
【図１】直結型の可変速給水装置のシステム構成の説明
図。FIG. 1 is an explanatory diagram of a system configuration of a direct connection type variable speed water supply device.
【図２】本発明の一実施例の可変速給水装置の制御系の
説明図。FIG. 2 is an explanatory diagram of a control system of the variable speed water supply apparatus according to the embodiment of the present invention.
【図３】本発明の一実施例のパラメータ補正のブロック
図。FIG. 3 is a block diagram of parameter correction according to an embodiment of the present invention.
【図４】本発明の一実施例の少水量停止動作のフロー
図。FIG. 4 is a flow chart of a small water amount stopping operation according to an embodiment of the present invention.
【図５】本発明の一実施例のポンプ並列運転の追加投入
のフロー図。FIG. 5 is a flow chart of additional injection of pump parallel operation according to an embodiment of the present invention.
【図６】本発明の一実施例のポンプ並列運転の解列離脱
のフロー図。FIG. 6 is a flow chart of parallel disconnection in parallel pump operation according to an embodiment of the present invention.
１９ 流量検出器 ２１ 流入圧力検出器 ２２ 制御部 ２３ 吐出圧力検出器 ２５ 可変速手段（インバータ） Ｐs 流入圧力 Ｐd 吐出圧力 ３１ 締切圧力Ｐo 算定の演算部 ３２ 運転速度補正の演算部 19 Flow rate detector 21 Inflow pressure detector 22 Control unit 23 Discharge pressure detector 25 Variable speed means (inverter) Ps Inflow pressure Pd discharge pressure 31 Calculation unit for calculating the dead pressure Po 32 Operating speed correction calculator
Claims (9)
る流入圧力検出器と、 前記吐出管に設けられた加圧ポンプの吐出圧力を検出す
る吐出圧力検出器と、 前記加圧ポンプを可変速駆動する可変速駆動手段と、 前記ポンプを制御する制御手段とを備え、 該制御手段は、流入圧力を用いて少水量停止動作時の前
記加圧ポンプの運転制御をすることを特徴とする可変速
給水装置。1. An inflow pipe connected to a water distribution pipe, a pressurizing pump connected to the inflow pipe, a discharge pipe connected to a discharge side of the pressurizing pump, and an adder provided to the inflow pipe. An inflow pressure detector for detecting an inflow pressure of a pressure pump; a discharge pressure detector for detecting a discharge pressure of a pressurizing pump provided in the discharge pipe; and a variable speed driving means for driving the pressurizing pump at a variable speed. A variable speed water supply device, comprising: a control unit that controls the pump, wherein the control unit controls the operation of the pressurizing pump during a small water volume stop operation using an inflow pressure.
られた圧力タンクに蓄圧する蓄圧運転を含むことを特徴
とする請求項１に記載の可変速給水措置。2. The variable speed water supply device according to claim 1, wherein the small water amount stopping operation includes a pressure accumulating operation for accumulating pressure in a pressure tank provided in the discharge pipe.
圧運転時の前記加圧ポンプの運転速度を補正することを
特徴とする請求項２に記載の可変速給水装置。 3. The control means uses the inflow pressure to perform the storage.
It is necessary to correct the operating speed of the pressurizing pump during pressure operation.
The variable speed water supply device according to claim 2.
れた運転速度により所定の時間行われることを特徴とす
る請求項３に記載の可変速給水装置。 4. The accumulator operation is corrected using the inflow pressure.
Is performed for a predetermined time depending on the operating speed
The variable speed water supply device according to claim 3.
記加圧ポンプの運転パラメータを前記流入圧力検出器で
検出されたポンプ流入圧力を用いて補正することで前記
加圧ポンプを運転制御することを特徴とする請求項１乃
至４のいずれか１項に記載の可変速給水装置。5. The operation control of the pressurizing pump by correcting the operating parameter of the pressurizing pump when the inflow pressure is zero using the pump inflow pressure detected by the inflow pressure detector. claim 1 乃, characterized by
The variable speed water supply device according to any one of items 4 to 4 .
る流入圧力検出器と、 前記吐出管に設けられた加圧ポンプの吐出圧力を検出す
る吐出圧力検出器と、 前記吐出管に設けられた圧力タンクと、 前記加圧ポンプを可変速駆動する可変速駆動手段と、 前記ポンプを制御する制御手段とを備え、 前記制御手段は前記加圧ポンプの運転パラメータを前記
流入圧力検出器で検出されたポンプ流入圧力を用いて補
正することで少水量停止動作時の前記加圧ポンプの運転
制御をすることを特徴とする可変速給水装置。6. An inflow pipe connected to the water distribution pipe, a pressurizing pump connected to the inflow pipe, a discharge pipe connected to a discharge side of the pressurizing pump, and an adder provided to the inflow pipe. An inflow pressure detector for detecting an inflow pressure of a pressure pump, a discharge pressure detector for detecting a discharge pressure of a pressure pump provided in the discharge pipe, a pressure tank provided in the discharge pipe, and the pressurization. A variable speed drive means for driving the pump at a variable speed, and a control means for controlling the pump, wherein the control means uses the pump inflow pressure detected by the inflow pressure detector as an operating parameter of the pressurizing pump. A variable speed water supply device characterized by performing operation control of the pressurizing pump at the time of a small water volume stop operation by making a correction.
の少水量を検知すると、前記圧力タンクに蓄圧して前記
加圧ポンプを停止させることを特徴とする請求項６に記
載の可変速給水装置。7. The variable speed control according to claim 6 , wherein the small water amount stopping operation stores pressure in the pressure tank to stop the pressure pump when a small amount of water of the pressure pump is detected. Water supply device.
るときに前記流入圧力検出器で検出されたポンプ流入圧
力を用いて前記加圧ポンプの運転速度を補正することを
特徴とする請求項７に記載の可変速給水装置。 8. The control means stores pressure in the pressure tank.
Pump inflow pressure detected by the inflow pressure detector when
To correct the operating speed of the pressurizing pump using force
The variable speed water supply device according to claim 7.
る流入圧力検出器と、 前記吐出管に設けられた加圧ポンプの吐出圧力を検出す
る吐出圧力検出器と、 前記吐出管に設けられた圧力タンクと、 前記加圧ポンプを可変速駆動する可変速駆動手段と、 前記ポンプを制御する制御手段とを備え、 該制御手段は、少水量時は前記圧力タンクに蓄圧した状
態で前記加圧ポンプを停止し、この少水量停止動作時に
流入圧力を用いて前記加圧ポンプの運転制御をすること
を特徴とする可変速給水装置。 9. An inflow pipe connected to the water distribution pipe, a pressurizing pump connected to the inflow pipe , a discharge pipe connected to a discharge side of the pressurizing pump, and an additional pipe provided to the inflow pipe. Detects inflow pressure of pressure pump
Inflow pressure detector and the discharge pressure of the pressure pump installed in the discharge pipe are detected.
That a discharge pressure detector, a pressure tank provided on the discharge tube, and variable speed drive means for variable speed drives the pressure pump, and a control means for controlling the pump, the control means, small When the amount of water is
Stop the pressurizing pump in the state, and at the time of this small water volume stop operation
Controlling the operation of the pressurizing pump using the inflow pressure
Variable speed water supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003045189A JP3533430B2 (en) | 1995-03-28 | 2003-02-21 | Variable speed water supply |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7-94536 | 1995-03-28 | ||
| JP9453695 | 1995-03-28 | ||
| JP2003045189A JP3533430B2 (en) | 1995-03-28 | 2003-02-21 | Variable speed water supply |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09744296A Division JP3425294B2 (en) | 1995-03-28 | 1996-03-27 | Variable speed water supply |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003327166A Division JP3933616B2 (en) | 1995-03-28 | 2003-09-19 | Variable speed water supply system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003262190A JP2003262190A (en) | 2003-09-19 |
| JP3533430B2 true JP3533430B2 (en) | 2004-05-31 |
Family
ID=29217485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003045189A Expired - Lifetime JP3533430B2 (en) | 1995-03-28 | 2003-02-21 | Variable speed water supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3533430B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4873328B2 (en) * | 2008-02-21 | 2012-02-08 | 株式会社安川電機 | Water supply control method and apparatus, and water supply control system including the apparatus |
-
2003
- 2003-02-21 JP JP2003045189A patent/JP3533430B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003262190A (en) | 2003-09-19 |
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