JP2003021069A - Water supply system and its control method - Google Patents
Water supply system and its control methodInfo
- Publication number
- JP2003021069A JP2003021069A JP2001204014A JP2001204014A JP2003021069A JP 2003021069 A JP2003021069 A JP 2003021069A JP 2001204014 A JP2001204014 A JP 2001204014A JP 2001204014 A JP2001204014 A JP 2001204014A JP 2003021069 A JP2003021069 A JP 2003021069A
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- Prior art keywords
- pump
- speed
- water
- pumps
- water supply
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- 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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- Control Of Positive-Displacement Pumps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ポンプを使用し
て、集合住宅、ビル等に水道水等の給水を行う給水装置
に係り、特に複数のポンプの追加運転制御に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply device for supplying tap water or the like to an apartment house, a building or the like using a pump, and more particularly to additional operation control of a plurality of pumps.
【０００２】[0002]
【従来の技術】前記給水装置は、例えば貯水槽に接続さ
れ、貯水槽の水を所定圧に加圧して集合住宅・ビル等の
末端の需要者に給水を行う。このため給水装置には、ポ
ンプと、そのポンプケーシングの吸込側、及び吐出側に
接続された配管と、配管内の圧力を検出する圧力センサ
等のセンサ類と、圧力タンク等を備えている。ここで、
圧力タンクはその内部にポンプで加圧された水を蓄える
ことで、ポンプの頻繁な起動停止を防止し、供給水圧を
常に一定に保つ作用を果たしている。また、ポンプを駆
動するモータと、そのモータに電力を供給するインバー
タ装置等の駆動電源回路と、ポンプの運転を制御する制
御手段とを備え、これらは上記ポンプや配管と共にキャ
ビネット内に収容されている。2. Description of the Related Art The water supply device is connected to, for example, a water tank and pressurizes the water in the water tank to a predetermined pressure to supply water to end users such as apartments and buildings. Therefore, the water supply device includes a pump, piping connected to the suction side and the discharge side of the pump casing, sensors such as a pressure sensor for detecting the pressure in the piping, and a pressure tank. here,
The pressure tank stores therein the water pressurized by the pump, thereby preventing the pump from being frequently started and stopped and keeping the supply water pressure constant. Further, a motor for driving the pump, a drive power supply circuit such as an inverter device for supplying electric power to the motor, and a control means for controlling the operation of the pump are provided, and these are housed in a cabinet together with the pump and piping. There is.
【０００３】このような給水装置においては、通常２台
または３台のポンプを備え、負荷水量に対応してポンプ
の台数制御運転が行われる。即ち、負荷水量が少ない場
合には１台のポンプのみを運転し、他のポンプを停止し
ておく。そして、負荷水量が増大し、１台のポンプで供
給が間に合わない場合には、２台目のポンプを起動す
る。そして２台のポンプで需要家側への給水を行い、需
要家側の供給水量が減少した場合には、再び１台運転に
戻るようにしている。In such a water supply system, usually two or three pumps are provided, and the number of pumps control operation is performed according to the amount of load water. That is, when the amount of loaded water is small, only one pump is operated and the other pumps are stopped. Then, when the load water amount increases and the supply cannot be made in time with one pump, the second pump is started. Then, the two pumps supply water to the customer side, and when the water supply amount on the customer side decreases, the operation is returned to one machine again.
【０００４】図４は、従来のポンプの追加動作フローを
示す。即ち、需要家側の使用水量が増加すると、１台目
の先発ポンプの運転から、２台目の後発ポンプを追加運
転するためのフローである。このポンプの追加動作は、
まず少水量検出手段が少水量状態であることを検知して
いないことを確認する。即ち、給水装置の配管管路に設
けられたフロースイッチが開いているか否かを確認す
る。フロースイッチが開いていれば、水量があることが
示され、これにより少水量状態でないことが検知され
る。次に、ポンプの速度がその追加設定の回転速度であ
るか否かが判断される。即ち、先発ポンプが最高回転速
度で運転していることは、そのポンプの能力いっぱいで
運転していることを意味し、追加遅延タイマによりその
ような状態が一定時間継続していることを確認して、後
発ポンプの追加動作に入る。FIG. 4 shows an additional operation flow of the conventional pump. That is, when the amount of water used on the consumer side increases, it is a flow from the operation of the first starter pump to the additional operation of the second starter pump. The additional operation of this pump is
First, it is confirmed that the small water amount detecting means does not detect the small water amount state. That is, it is confirmed whether or not the flow switch provided in the pipe line of the water supply device is open. If the flow switch is open, it indicates that there is a water quantity, which detects that the water quantity is not low. Next, it is determined whether the speed of the pump is the additional set rotational speed. That is, the fact that the starting pump is operating at the maximum rotation speed means that the pump is operating at full capacity, and the additional delay timer confirms that such a state continues for a certain period of time. Then, the additional operation of the subsequent pump is started.
【０００５】[0005]
【発明が解決しようとする課題】図４に示す従来のポン
プの追加動作フローでは、ポンプが例えば誘導電動機に
より駆動され、インバータ装置によりその最高回転速度
（追加設定の回転速度）まで運転できる場合には、特に
問題が生じない。しかしながら、ポンプがＤＣブラシレ
スモータ（永久磁石型電動機）によりインバータ装置を
用いて可変速駆動される場合には、その保護機能の関係
から問題が生じる。即ち、このような電子制御機能を備
えたＤＣブラシレスモータによりポンプを駆動する場合
には、その負荷が大きくなると電流がその許容最大電流
以上に流れないように制御して、これにより自己保護機
能が働くようになっている。In the additional operation flow of the conventional pump shown in FIG. 4, when the pump is driven by, for example, an induction motor and the inverter device can drive the pump up to its maximum rotation speed (additional rotation speed). Does not cause any particular problem. However, when the pump is driven at a variable speed by the DC brushless motor (permanent magnet type electric motor) using the inverter device, a problem arises due to the relation of the protection function. That is, when the pump is driven by the DC brushless motor having such an electronic control function, when the load increases, the current is controlled so that it does not exceed the maximum allowable current, and thus the self-protection function is achieved. I am supposed to work.
【０００６】このようなポンプでは、需要家側への負荷
水量が増大しても、ポンプがその追加設定の回転速度に
到達する前に、上述した自己保護機能が働き最高回転速
度（追加設定の回転速度）まで到達しないという問題が
ある。このため、上述した図４に示す後発ポンプの追加
動作条件が整わないことになり、このため需要家側で要
求水量が増加しても、２台目ポンプの追加運転動作に入
れず、結局１台運転の状態が維持され、ポンプの回転速
度が低下し、供給圧力が低下し、十分な水量を需要家側
に供給できなくなる。In such a pump, even if the amount of water loaded on the consumer side increases, the above-mentioned self-protection function operates before the pump reaches the additional set rotational speed, and the maximum rotational speed (of the additional set There is a problem that it does not reach the rotation speed). Therefore, the additional operation condition of the subsequent pump shown in FIG. 4 is not satisfied, and therefore, even if the demanded water amount increases on the customer side, the additional operation operation of the second pump cannot be performed, and eventually 1 The state of stand operation is maintained, the rotation speed of the pump decreases, the supply pressure decreases, and it becomes impossible to supply a sufficient amount of water to the customer side.
【０００７】本発明は上述の事情に鑑みて為されたもの
で、電流制限機能を備えた永久磁石型電動機によりポン
プが駆動される場合においても、安定したポンプの追加
動作を行うことができる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. Even when the pump is driven by a permanent magnet type electric motor having a current limiting function, it is possible to perform a stable addition operation of the pump. The purpose is to provide a device.
【０００８】[0008]
【課題を解決するための手段】本発明の給水装置は、水
を加圧して送水する複数のポンプと、該ポンプのケーシ
ングの吸込側及び吐出側に接続された配管と、前記ポン
プを駆動するモータと、該モータに電力を供給する駆動
電源回路と、前記ポンプの運転を制御する制御手段とを
備えた給水装置において、前記ポンプは一定の最大電流
を越えない運転を行うように制御され、先発ポンプの回
転速度が追加設定の回転速度に到達しない場合に、前記
先発ポンプの速度指令値と実回転速度の差が所定の設定
値を越えたときに後発ポンプの追加動作を行うことを特
徴とする。A water supply device of the present invention drives a plurality of pumps for pressurizing and feeding water, pipes connected to the suction side and the discharge side of a casing of the pumps, and the pumps. In a water supply device including a motor, a drive power supply circuit that supplies electric power to the motor, and a control unit that controls the operation of the pump, the pump is controlled to perform an operation that does not exceed a constant maximum current, When the rotation speed of the starting pump does not reach the rotation speed of the additional setting, the additional operation of the subsequent pump is performed when the difference between the speed command value of the starting pump and the actual rotation speed exceeds a predetermined set value. And
【０００９】上記本発明によれば、運転中の先発ポンプ
の回転速度が、増速指令にもかかわらず、追加設定の回
転速度に到達しない場合に、速度指令値と実回転速度の
差が開いたときに、運転中のポンプがその最大能力に到
達したものと判断するようにしたものである。従って、
この判断により後発ポンプの追加動作を行うことで、運
転対象のポンプが一定の最大電流を越えない保護機能を
有するポンプであっても、安定した追加動作を行うこと
が可能となる。According to the present invention described above, when the rotation speed of the starting pump in operation does not reach the additionally set rotation speed despite the increase command, the difference between the speed command value and the actual rotation speed is opened. When the pump is operating, it is determined that the pump in operation has reached its maximum capacity. Therefore,
By performing the additional operation of the subsequent pump based on this determination, it is possible to perform the stable additional operation even if the pump to be operated has a protection function that does not exceed a certain maximum current.
【００１０】また、前記速度指令値と実回転速度の差が
所定の設定値を所定の時間越えたときに、前記追加動作
を行うことが好ましい。It is preferable that the additional operation is performed when the difference between the speed command value and the actual rotation speed exceeds a predetermined set value for a predetermined time.
【００１１】また、前記追加動作の判断の前に、少水量
状態であるか否かをチェックし、少水量状態である場合
には、前記追加動作の判断を行わないことが好ましい。Further, it is preferable that before the judgment of the additional operation, whether or not the water amount is small is checked, and if the water amount is small, the judgment of the additional operation is preferably not performed.
【００１２】また、複数の可変速運転ポンプを備え、該
複数のポンプの追加解列動作が可能な給水装置におい
て、先発のポンプの実回転速度の検出手段と、該検出手
段により検出された速度が前記ポンプの追加設定の回転
速度であるか否かを判断する手段と、前記ポンプの速度
が前記追加設定の回転速度に達しない場合に、速度指令
値と実回転速度の差を求め、その差が所定値を越えたと
きに追加動作を行う手段とを備えることが好ましい。Further, in a water supply apparatus provided with a plurality of variable speed operation pumps and capable of performing an additional parallel disconnection operation of the plurality of pumps, a means for detecting an actual rotation speed of the preceding pump and a speed detected by the detection means. Means for determining whether or not the additional setting rotational speed of the pump, and when the speed of the pump does not reach the additional setting rotational speed, obtain the difference between the speed command value and the actual rotational speed, Means for performing an additional operation when the difference exceeds a predetermined value are preferably provided.
【００１３】また、前記ポンプは、ＤＣブラシレスモー
タにより駆動されるポンプであることが好ましい。Further, the pump is preferably a pump driven by a DC brushless motor.
【００１４】[0014]
【発明の実施の形態】以下、本発明の実施の形態につい
て、図１乃至図４を参照しながら説明する。尚、各図中
同一符号は同一または相当部分を示す。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. In the drawings, the same reference numerals indicate the same or corresponding parts.
【００１５】図１は、本発明の実施形態の給水装置の構
成例を示す。給水装置１０には、２台のポンプ１１，１
２を備え、それぞれが一定の最大電流を越えない保護機
能を有するＤＣブラシレスモータ１３，１４により駆動
される。インバータ装置１５，１６は、それぞれＤＣブ
ラシレスモータ１３，１４に可変周波数・電圧の交流電
力を供給し、これによりポンプ１１，１２を可変速運転
する。インバータ装置１５，１６の制御は、マイクロプ
ロセッサ等の制御手段１７により行われる。制御手段１
７は、ＥＥＰＲＯＭ等の記憶手段１８を備え、これらの
記憶手段により記憶されたプログラムに従い、後述する
追加動作フローを含む給水装置１０の全体的な運転制御
が行われる。FIG. 1 shows a configuration example of a water supply device according to an embodiment of the present invention. The water supply device 10 includes two pumps 11, 1
2 are driven by DC brushless motors 13 and 14 each having a protection function that does not exceed a certain maximum current. The inverter devices 15 and 16 supply AC power of variable frequency and voltage to the DC brushless motors 13 and 14, respectively, thereby operating the pumps 11 and 12 at variable speeds. The control of the inverter devices 15 and 16 is performed by the control means 17 such as a microprocessor. Control means 1
7 includes a storage unit 18 such as an EEPROM, and the overall operation control of the water supply device 10 including an additional operation flow described below is performed according to the programs stored in these storage units.
【００１６】また、給水装置１０の吸込側から吐出側に
至る配管管路には、フロースイッチ２１，２２を備え、
管路に流れる水量が極めて少ない少水量状態を検出す
る。このフロースイッチ２１，２２により少水量状態が
検出されると、圧力タンク２３に加圧水を蓄圧し、ポン
プの運転を停止する少水量停止動作に入る。これによ
り、略締め切り状態でのポンプの運転が防止され、また
ポンプの頻繁な起動停止を避けることができる。また、
配管管路には圧力検出器２４を備え、この圧力検出器２
４で検出された圧力に基づいて、上述した制御手段１７
によりポンプ１１，１２の可変速運転を行う。また、配
管管路には逆止弁２５，２６を備え、ポンプ停止時等の
吐出側から吸込側への逆流を防止する。In addition, flow switches 21 and 22 are provided in the pipeline from the suction side to the discharge side of the water supply device 10,
Detects a small amount of water flowing in the pipeline, which is extremely small. When a small amount of water state is detected by the flow switches 21 and 22, the amount of pressurized water is stored in the pressure tank 23, and a small amount of water stopping operation for stopping the operation of the pump is started. As a result, it is possible to prevent the pump from operating in a substantially deadline state, and to avoid frequent start and stop of the pump. Also,
The pipe line is provided with a pressure detector 24, and the pressure detector 2
Based on the pressure detected in 4, the above-mentioned control means 17
The variable speed operation of the pumps 11 and 12 is performed. In addition, check valves 25 and 26 are provided in the pipeline to prevent backflow from the discharge side to the suction side when the pump is stopped.
【００１７】図２（ａ）は、ポンプの流量・圧力特性を
示す。ポンプの水量と、吐出圧力と、回転速度との関係
は、図示する通りである。これらのポンプでは、使用水
量が増加すると、吐出圧力が設定圧になるように、回転
速度を、例えばＮ１からＮ３（最高回転速度）に向かっ
て増やすように制御する。給水装置の負荷側の制御曲線
が図示のＡの場合で、設定圧がＰＡの場合には、先発ポ
ンプを起動すると、ポンプの回転速度は、例えばＮ１か
らＮ３に到達する。このときの水量がそのポンプの有す
る最大能力である場合には、回転速度の上昇が抑制され
る機能が動作する水量Ｌを越えない場合である。この場
合には、ポンプは最高回転速度（Ｎ３）に到達し、従来
の図４に示す制御フローに従って、２台目ポンプの追加
動作を行うことができる。FIG. 2A shows the flow rate / pressure characteristic of the pump. The relationship among the water amount of the pump, the discharge pressure, and the rotation speed is as illustrated. In these pumps, when the amount of water used increases, the pumping speed is controlled so that the discharge pressure becomes the set pressure, for example, the rotation speed increases from N1 to N3 (maximum rotation speed). When the control curve on the load side of the water supply device is A and the set pressure is P A , when the starting pump is started, the rotational speed of the pump reaches, for example, N1 to N3. If the amount of water at this time is the maximum capacity of the pump, the amount of water does not exceed the amount L of water at which the function of suppressing the increase in the rotation speed operates. In this case, the pump reaches the maximum rotation speed (N3), and the additional operation of the second pump can be performed according to the conventional control flow shown in FIG.
【００１８】しかしながら、制御曲線が図示のＢであ
り、設定圧力がＰＢである場合には、ポンプの起動時に
回転速度がＮ１からＮ２まで上昇すると、回転速度の上
昇が抑制される機能の働く水量Ｌに到達する。この負荷
水量Ｌ以上の水量では、図２（ｂ）に示すように、モー
タの負荷電流Ｉが一定値ＩＯに抑制される。このため、
回転速度Ｎ３の水量・吐出圧力の特性曲線は、図中点線
で示す部分が維持できなくなる。水量Ｌ以上において
は、水量が増大すると回転速度Ｎ３よりも回転速度が図
中実線Ｓで示すように低下する。この状態では、インバ
ータ装置よりモータに供給される電流は、ＩＯ一定で制
御されるので、負荷水量が増大してもポンプとしては、
図示の実線Ｓで示す特性曲線上をポンプの動作点が移動
する。従って、負荷水量が増大すると、ポンプの回転速
度は緩やかに低下する。このため、設定圧力がＰＢの場
合には、負荷水量が増大すると、回転速度はモータ負荷
電流一定の制御機能が働き、更に負荷水量が増大して
も、ポンプ回転速度は増速指令にもかかわらず、Ｎ３
（最高回転速度）に到達し得ず、Ｎ３−αにまでしか到
達しない。従って、従来の図４に示す追加動作フローで
は、ポンプの回転速度が追加設定の回転速度Ｎ３（最高
回転速度）という条件が満たされないので、後発ポンプ
を追加動作させることができない。However, when the control curve is B as shown and the set pressure is P B , if the rotation speed increases from N1 to N2 when the pump is started, the function of suppressing the increase in rotation speed works. The amount of water L is reached. When the amount of water is equal to or more than the amount L of load water, the load current I of the motor is suppressed to a constant value I O as shown in FIG. 2B. For this reason,
In the characteristic curve of the water amount and the discharge pressure at the rotation speed N3, the part indicated by the dotted line in the figure cannot be maintained. When the amount of water is L or more, as the amount of water increases, the rotation speed becomes lower than the rotation speed N3 as shown by the solid line S in the figure. In this state, the current supplied from the inverter device to the motor is controlled at a constant I O , so even if the amount of load water increases, the pump will
The operating point of the pump moves on the characteristic curve shown by the solid line S in the figure. Therefore, when the load water amount increases, the rotation speed of the pump gradually decreases. Therefore, when the set pressure is P B , when the load water amount increases, the control function of the motor speed is constant for the rotation speed, and even if the load water amount further increases, the pump rotation speed will not be increased. Regardless, N3
(Maximum rotation speed) cannot be reached, and only N3-α is reached. Therefore, in the conventional additional operation flow shown in FIG. 4, the condition that the rotational speed of the pump is the additionally set rotational speed N3 (maximum rotational speed) is not satisfied, and the subsequent pump cannot be additionally operated.
【００１９】図３は、本発明の実施形態の制御フローを
示す。まず、フロースイッチ２１，２２の開閉状態をチ
ェックする。これによりポンプが少水量状態で動作して
いるか否かを確認する。フロースイッチが閉じている場
合には、少水量状態であるので、ポンプは略締め切り運
転状態であり、後発ポンプの追加動作は必要がないの
で、このプログラムはこのまま終了する。なお、このフ
ロースイッチのチェックは、回転速度のチェックを以下
に述べる後発ポンプの追加動作で行うので、追加動作を
行う場合には必ず必要である。次に、ポンプの回転速度
が最高回転速度（追加設定の回転速度）であるか否かを
チェックする。上述したように、ポンプ性能曲線と設定
圧と、回転速度の上昇が抑制される機能の働く水量との
関係から、ポンプ回転速度が設定した最高回転速度に到
達する場合には、「ＹＥＳ」であり、追加遅延タイマを
スタートする。この追加遅延タイマは、所定時間同一の
状態が維持されることを追加遅延タイマカウントアップ
で確認して、その結果が、「ＹＥＳ」であるならば追加
動作を行う。FIG. 3 shows a control flow of the embodiment of the present invention. First, the open / closed state of the flow switches 21 and 22 is checked. This confirms whether the pump is operating with a small amount of water. When the flow switch is closed, the pump is in a substantially shut-off operation state because it is in a small water amount state, and the additional operation of the subsequent pump is not necessary. Therefore, this program ends as it is. The check of the flow switch is performed when the additional operation is performed because the check of the rotation speed is performed by the additional operation of the subsequent pump described below. Next, it is checked whether the rotation speed of the pump is the maximum rotation speed (additional rotation speed). As described above, from the relationship between the pump performance curve, the set pressure, and the water amount at which the function of suppressing the increase of the rotation speed works, when the pump rotation speed reaches the set maximum rotation speed, “YES” is selected. Yes, start additional delay timer. This additional delay timer confirms that the same state is maintained for a predetermined time by counting up the additional delay timer, and if the result is "YES", performs an additional operation.
【００２０】本発明の追加動作フローにおいては、
速度指令−実回転速度＞設定値
の判断ルーチンを備えている。この判断は、設定吐出圧
力がＰＢである場合には、負荷水量の増減に対応して回
転速度がＮ３−α以下の範囲で動作する。しかしなが
ら、上述したようにモータの最大電流がＩＯに制限され
た場合には、図２（ａ）に実線で示す電流一定制御の曲
線Ｓ上で動作し、負荷水量が増大した場合には吐出圧力
が低下し、ポンプの回転速度が低下する。ポンプの実回
転速度は、各ポンプに備えたインバータにより検出され
る。そのような状況にあるときには、ポンプの速度指令
は、実際の吐出圧力が目標吐出圧力に到達しないので、
ポンプの回転速度を上昇させる方向で速度指令が出され
る。これに対して、実回転速度は到達予定の回転速度よ
りも低いことは上述したとおりである。従って、速度指
令値から実回転速度を減算する演算を行い、この差があ
る程度の大きさである場合には、「ＹＥＳ」とする。こ
れにより、追加遅延タイマがスタートし、所定時間この
状態の継続が確認されると、追加遅延タイマがカウント
アップし、後発ポンプの追加動作にはいる。この、速度
指令値と実回転速度との差は、例えば速度指令値が２４
０Ｈｚ程度である場合には、例えば５Ｈｚ程度が好適で
ある。速度指令値と実回転速度との差が検出されること
で、後発ポンプを確実に追加投入することができる。こ
れにより、先発ポンプが給水能力の限界に達したことを
的確に判断して、後発ポンプの追加動作を行える。The additional operation flow of the present invention is provided with a judgment routine of speed command-actual rotation speed> set value. In this determination, when the set discharge pressure is P B , the rotation speed operates in the range of N3−α or less corresponding to the increase / decrease in the amount of load water. However, as described above, when the maximum current of the motor is limited to I O , the motor operates on the curve S of the constant current control shown by the solid line in FIG. 2A, and when the load water amount increases, the discharge The pressure drops and the pump speed decreases. The actual rotation speed of the pump is detected by the inverter provided in each pump. In such a situation, the speed command of the pump will be because the actual discharge pressure does not reach the target discharge pressure.
A speed command is issued in the direction of increasing the rotation speed of the pump. On the other hand, the actual rotation speed is lower than the rotation speed scheduled to reach, as described above. Therefore, a calculation for subtracting the actual rotation speed from the speed command value is performed, and if the difference is large to some extent, the result is "YES". As a result, the additional delay timer is started, and when it is confirmed that this state continues for a predetermined time, the additional delay timer counts up, and the additional operation of the subsequent pump is started. The difference between the speed command value and the actual rotation speed is, for example, that the speed command value is 24
When it is about 0 Hz, about 5 Hz is suitable, for example. By detecting the difference between the speed command value and the actual rotation speed, it is possible to reliably add the subsequent pump. As a result, it is possible to accurately determine that the starting pump has reached the limit of the water supply capacity and perform the additional operation of the subsequent pump.
【００２１】なお、上述した実施形態においては、２台
のポンプを台数制御する例について説明したが、３台以
上のポンプがある場合にも同様に制御できることは勿論
である。また、上述した実施形態では貯水槽から給水す
る装置について説明したが、水道本管に直結した直結型
の給水装置においても同様に適用が可能である。また、
電流制限機能を有するモータとしてＤＣブラシレスモー
タについて説明したが、他の形式のモータでも電流一定
制限機能を有する場合には同様に適用が可能である。こ
のように、本発明の趣旨を逸脱することなく種々の変形
実施例が可能である。In the above-described embodiment, an example of controlling the number of two pumps has been described, but it is needless to say that the same control can be performed when there are three or more pumps. Moreover, although the apparatus which supplies water from a water tank was demonstrated in the above-mentioned embodiment, it is applicable similarly also to the direct connection type water supply apparatus directly connected with the water main. Also,
Although the DC brushless motor has been described as a motor having a current limiting function, other types of motors can be similarly applied to a motor having a constant current limiting function. As described above, various modified embodiments are possible without departing from the spirit of the present invention.
【００２２】[0022]
【発明の効果】以上説明したように、本発明によれば、
モータへの供給電流を一定に保つ保護機能を備えた永久
磁石型（ＤＣブラシレス）モータを使用しても、追加運
転制御を確実に行える。このため、ＤＣブラシレスモー
タ等の高効率モータを用い、そのモータの能力をフルに
発揮しつつ、複数のポンプの台数制御運転を容易に行え
る給水装置を提供できる。As described above, according to the present invention,
Even if a permanent magnet type (DC brushless) motor having a protection function of keeping the supply current to the motor constant is used, the additional operation control can be reliably performed. Therefore, it is possible to provide a water supply device that uses a high-efficiency motor such as a DC brushless motor and can easily perform the number-of-units control operation of a plurality of pumps while fully utilizing the performance of the motor.
【図１】本発明の実施形態の給水装置の構成例を示す図
である。FIG. 1 is a diagram showing a configuration example of a water supply device according to an embodiment of the present invention.
【図２】（ａ）はポンプの流量・圧力特性を示す図であ
り、（ｂ）は水量とモータ電流との関係を示す図であ
り、水量Ｌ以上でモータ電流が一定に制御される特性を
示す。2A is a diagram showing a flow rate / pressure characteristic of a pump, FIG. 2B is a diagram showing a relationship between a water amount and a motor current, and a characteristic in which the motor current is controlled to be constant at a water amount L or more. Indicates.
【図３】本発明の実施形態の後発ポンプの追加運転制御
を示すフロー図である。FIG. 3 is a flow chart showing additional operation control of the subsequent pump according to the embodiment of the present invention.
【図４】従来の後発ポンプの追加運転制御を示すフロー
図である。FIG. 4 is a flowchart showing additional operation control of a conventional subsequent pump.
１１，１２ ポンプ
１３，１４ ＤＣブラシレスモータ
１５，１６ インバータ装置
１７ 制御手段
１８ 記憶手段
２１，２２ フロースイッチ（少水量検出手段）
２３ 圧力タンク
２４ 圧力検出器
２５，２６ 逆止弁
ＰＡ，ＰＢ 圧力設定値
Ｌ 回転速度の上昇が抑制される機能（モータ電流
一定制御）の働く水量11, 12 Pumps 13, 14 DC brushless motors 15, 16 Inverter device 17 Control means 18 Storage means 21, 22 Flow switch (small water amount detection means) 23 Pressure tank 24 Pressure detectors 25, 26 Check valves P A , P B Pressure set value L Water volume that functions to suppress increase in rotation speed (motor current constant control)
フロントページの続き (72)発明者 杉田 松夫 東京都大田区羽田旭町11番１号 株式会社 荏原製作所内 (72)発明者 八木 薫 東京都大田区羽田旭町11番１号 株式会社 荏原製作所内 (72)発明者 小松 崇秀 東京都大田区羽田旭町11番１号 株式会社 荏原製作所内 (72)発明者 手嶋 友治 神奈川県藤沢市本藤沢４丁目１番１号 株 式会社荏原電産内 Ｆターム(参考） 3H045 AA09 AA16 AA23 BA19 CA06 CA09 CA21 CA29 DA32 EA36Continued front page (72) Inventor Matsuo Sugita 11-1 Haneda Asahi-cho, Ota-ku, Tokyo Co., Ltd. Inside the EBARA CORPORATION (72) Inventor Kaoru Yagi 11-1 Haneda Asahi-cho, Ota-ku, Tokyo Co., Ltd. Inside the EBARA CORPORATION (72) Inventor Takahide Komatsu 11-1 Haneda Asahi-cho, Ota-ku, Tokyo Co., Ltd. Inside the EBARA CORPORATION (72) Inventor Yuji Teshima 4-1-1 Honfujisawa, Fujisawa City, Kanagawa Prefecture In ceremony company EBARA DENSAN F term (reference) 3H045 AA09 AA16 AA23 BA19 CA06 CA09 CA21 CA29 DA32 EA36
Claims (5)
該ポンプのケーシングの吸込側及び吐出側に接続された
配管と、前記ポンプを駆動するモータと、該モータに電
力を供給する駆動電源回路と、前記ポンプの運転を制御
する制御手段とを備えた給水装置において、 前記ポンプは一定の最大電流を越えない運転を行うよう
に制御され、先発ポンプの回転速度が追加設定の回転速
度に到達しない場合に、前記先発ポンプの速度指令値と
実回転速度の差が所定の設定値を越えたときに後発ポン
プの追加動作を行うことを特徴とする給水装置の制御方
法。1. A plurality of pumps for pressurizing and sending water.
The pump has a casing connected to the suction side and the discharge side of the casing, a motor for driving the pump, a drive power supply circuit for supplying electric power to the motor, and a control means for controlling the operation of the pump. In the water supply device, the pump is controlled to perform an operation that does not exceed a certain maximum current, when the rotation speed of the starting pump does not reach the additional setting rotation speed, the speed command value and the actual rotation speed of the starting pump. A method for controlling a water supply device, characterized in that the additional operation of the subsequent pump is performed when the difference between the two exceeds a predetermined set value.
の設定値を所定の時間越えたときに、前記追加動作を行
うことを特徴とする請求項１記載の給水装置の制御方
法。2. The method of controlling the water supply device according to claim 1, wherein the additional operation is performed when the difference between the speed command value and the actual rotation speed exceeds a predetermined set value for a predetermined time.
であるか否かをチェックし、少水量状態である場合に
は、前記追加動作の判断を行わないことを特徴とする請
求項１記載の給水装置の制御方法。3. Before the determination of the additional operation, it is checked whether or not the water amount is in a small water amount state, and when the water amount is in the low water amount state, the determination of the additional operation is not performed. 1. The method for controlling the water supply device according to 1.
のポンプの追加解列動作が可能な給水装置において、先
発のポンプの実回転速度の検出手段と、該検出手段によ
り検出された速度が前記ポンプの追加設定の回転速度で
あるか否かを判断する手段と、前記ポンプの速度が前記
追加設定の回転速度に達しない場合に、速度指令値と実
回転速度の差を求め、その差が所定値を越えたときに追
加動作を行う手段とを備えたことを特徴とする給水装
置。4. A water supply apparatus comprising a plurality of variable speed operation pumps capable of performing an additional parallel disconnection operation of the plurality of pumps, a detecting means for detecting an actual rotational speed of a preceding pump, and a speed detected by the detecting means. Means for determining whether or not the additional setting rotational speed of the pump, and when the speed of the pump does not reach the additional setting rotational speed, obtain the difference between the speed command value and the actual rotational speed, And a means for performing an additional operation when the difference exceeds a predetermined value.
より駆動されるポンプであることを特徴とする請求項４
記載の給水装置。5. The pump is a pump driven by a DC brushless motor.
Water supply device described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001204014A JP4684478B2 (en) | 2001-07-04 | 2001-07-04 | Control method of water supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001204014A JP4684478B2 (en) | 2001-07-04 | 2001-07-04 | Control method of water supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003021069A true JP2003021069A (en) | 2003-01-24 |
| JP4684478B2 JP4684478B2 (en) | 2011-05-18 |
Family
ID=19040557
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001204014A Expired - Lifetime JP4684478B2 (en) | 2001-07-04 | 2001-07-04 | Control method of water supply device |
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| Country | Link |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004232497A (en) * | 2003-01-28 | 2004-08-19 | Ebara Corp | Water supply device |
| JP2009008035A (en) * | 2007-06-29 | 2009-01-15 | Ebara Corp | Variable speed water supply device |
| JP2009529847A (en) * | 2005-11-21 | 2009-08-20 | エンテグリース，インコーポレイテッド | Piston control system and method for pump mechanical piston |
| US8814536B2 (en) | 2004-11-23 | 2014-08-26 | Entegris, Inc. | System and method for a variable home position dispense system |
| US8870548B2 (en) | 2005-12-02 | 2014-10-28 | Entegris, Inc. | System and method for pressure compensation in a pump |
| US9309872B2 (en) | 2005-12-02 | 2016-04-12 | Entegris, Inc. | System and method for position control of a mechanical piston in a pump |
| US9399989B2 (en) | 2005-11-21 | 2016-07-26 | Entegris, Inc. | System and method for a pump with onboard electronics |
| US9631611B2 (en) | 2006-11-30 | 2017-04-25 | Entegris, Inc. | System and method for operation of a pump |
| JP2021025434A (en) * | 2019-07-31 | 2021-02-22 | 株式会社川本製作所 | Water supply system and control method for water supply system |
-
2001
- 2001-07-04 JP JP2001204014A patent/JP4684478B2/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004232497A (en) * | 2003-01-28 | 2004-08-19 | Ebara Corp | Water supply device |
| US8814536B2 (en) | 2004-11-23 | 2014-08-26 | Entegris, Inc. | System and method for a variable home position dispense system |
| US9617988B2 (en) | 2004-11-23 | 2017-04-11 | Entegris, Inc. | System and method for variable dispense position |
| JP2009529847A (en) * | 2005-11-21 | 2009-08-20 | エンテグリース，インコーポレイテッド | Piston control system and method for pump mechanical piston |
| JP2013150549A (en) * | 2005-11-21 | 2013-08-01 | Entegris Inc | Piston control system and method of mechanical piston of pump |
| US9399989B2 (en) | 2005-11-21 | 2016-07-26 | Entegris, Inc. | System and method for a pump with onboard electronics |
| US8870548B2 (en) | 2005-12-02 | 2014-10-28 | Entegris, Inc. | System and method for pressure compensation in a pump |
| US9309872B2 (en) | 2005-12-02 | 2016-04-12 | Entegris, Inc. | System and method for position control of a mechanical piston in a pump |
| US9816502B2 (en) | 2005-12-02 | 2017-11-14 | Entegris, Inc. | System and method for pressure compensation in a pump |
| US9631611B2 (en) | 2006-11-30 | 2017-04-25 | Entegris, Inc. | System and method for operation of a pump |
| JP2009008035A (en) * | 2007-06-29 | 2009-01-15 | Ebara Corp | Variable speed water supply device |
| JP2021025434A (en) * | 2019-07-31 | 2021-02-22 | 株式会社川本製作所 | Water supply system and control method for water supply system |
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| Publication number | Publication date |
|---|---|
| JP4684478B2 (en) | 2011-05-18 |
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