JP2971507B2 - Variable speed pump device - Google Patents
Variable speed pump deviceInfo
- Publication number
- JP2971507B2 JP2971507B2 JP9231790A JP9231790A JP2971507B2 JP 2971507 B2 JP2971507 B2 JP 2971507B2 JP 9231790 A JP9231790 A JP 9231790A JP 9231790 A JP9231790 A JP 9231790A JP 2971507 B2 JP2971507 B2 JP 2971507B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- control unit
- pump
- unit
- speed operation
- 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 - Fee Related
Links
Landscapes
- Control Of Non-Positive-Displacement Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は可変速ポンプ装置に関し、特に、ポンプの吐
出側圧力に関連する信号を送出可能な圧力検出部、この
圧力検出部からの信号に応じて上記ポンプの運転速度を
制御するための可変速運転制御部、上記ポンプを定周波
数電源により運転するための定速運転制御部および、上
記ポンプを上記可変速運転制御部と定速運転制御部とに
選択的に連携させるための切替手段を有する可変速ポン
プ装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable speed pump device, and more particularly, to a pressure detection unit capable of transmitting a signal related to a discharge side pressure of a pump, and a signal from the pressure detection unit. A variable speed operation control unit for controlling the operation speed of the pump in accordance with the constant speed operation control unit for operating the pump with a constant frequency power supply; and a variable speed operation control unit and a constant speed operation control for controlling the pump. The present invention relates to a variable speed pump device having switching means for selectively cooperating with a unit.
給水等に用いられる従来の可変速ポンプ装置において
は、第４図に例示するようにポンプ41の駆動用電動機42
が、吐出側流路43に設けられた圧力検出部44から制御部
45に入力される信号に応じて制御されるように構成され
ている。In a conventional variable speed pump device used for water supply or the like, as shown in FIG.
From the pressure detection unit 44 provided in the discharge side flow path 43 to the control unit
It is configured to be controlled according to a signal input to 45.
上記制御部45は、第５図に例示するように可変速運転
制御部46、定速運転制御部47および、上記電動機42を上
記可変速運転制御部46と定速運転制御部47とに選択的に
連携させるための切替手段48を備えている。上記可変速
運転制御部46は、定周波数電源から電動機42への入力回
路に設けられたインバータ49および主開閉器50を備え、
圧力設定部51に設定された目標圧力と、圧力検出部44に
よって検出された吐出側圧力との偏差に応じて演算部52
から送出される変速信号により電動機42の駆動速度を制
御するとともに、吐出側圧力が所定時間以上連続して所
定下限値以下の場合には圧力検出部44からの信号に応じ
て判定部53から送出される遮断信号により、上記開閉制
御部54および切替手段48を介して上記主開閉器50を遮断
し得るようになっている。また、上記定速運転制御部47
は上記定周波数電源から電動機42への直接の入力回路に
設けられた副開閉器55を備え、上述同様に吐出側圧力が
所定時間以上連続して所定下限値以下の場合には圧力検
出部44からの信号に応じて判定部56から送出される遮断
信号により、開閉制御部57および切替手段48を介して副
開閉器55を遮断し得るようになっている。そして、上記
切替手段48は上記主開閉器50および副開閉器55への各遮
断信号をインバータ49から送出される故障信号に応じて
選択的に開閉するようになっている。なお、図中58およ
び59は必要に応じて設けられる信号変換部である。The control unit 45 selects the variable speed operation control unit 46, the constant speed operation control unit 47, and the electric motor 42 as the variable speed operation control unit 46 and the constant speed operation control unit 47 as illustrated in FIG. There is provided a switching means 48 for making them cooperate with each other. The variable speed operation control unit 46 includes an inverter 49 and a main switch 50 provided in an input circuit from the constant frequency power supply to the electric motor 42,
The calculating unit 52 is operated in accordance with a deviation between the target pressure set in the pressure setting unit 51 and the discharge-side pressure detected by the pressure detecting unit 44.
The drive speed of the electric motor 42 is controlled by the speed change signal transmitted from the control unit 44, and when the discharge side pressure is continuously lower than a predetermined lower limit for a predetermined time or longer, a transmission is performed from a determination unit 53 according to a signal from the pressure detection unit 44. The main switch 50 can be shut off via the opening / closing control unit 54 and the switching means 48 in response to the shut-off signal. Further, the constant speed operation control unit 47
Is provided with a sub-switch 55 provided in the direct input circuit from the constant frequency power supply to the motor 42, and when the discharge pressure is continuously lower than the predetermined lower limit for a predetermined time or more as described above, the pressure detection unit 44 The auxiliary switch 55 can be shut off via the open / close control unit 57 and the switching means 48 by a shut-off signal sent from the determination unit 56 in response to a signal from the control unit 56. The switching means 48 selectively opens and closes each of the shut-off signals to the main switch 50 and the sub-switch 55 in response to a failure signal sent from the inverter 49. In the drawings, 58 and 59 are signal conversion units provided as needed.
上述のように構成された従来装置においては、上記イ
ンバータ49が故障した場合にはこれからの故障信号に応
じてポンプ42は自動的に定速運転に切替えられるが、後
述するように上記制御部45または圧力検出部44等に故障
を生じた場合には揚水不能な状態になってしまう。In the conventional device configured as described above, when the inverter 49 fails, the pump 42 is automatically switched to the constant speed operation in response to a failure signal from now on. Alternatively, if a failure occurs in the pressure detection unit 44 or the like, the pump cannot be pumped.
すなわち、正常な可変速運転が行われているときに a.上記開閉制御部54に接触不良またはその他の故障が生
じた場合、 b.インバータ49が故障したにも拘らず所定の故障信号が
送出されない場合、 c.圧力検出部44が故障して実際よりも低い圧力に対応す
る異常信号を送出した場合 などにはいずれも故障信号が送出されないから、上記切
替手段48が作動せずポンプ41が定速運転に切替えられな
いままでいる。そして、圧力検出部44からの異常信号が
所定時間以上連続したときには上記判定部56からの遮断
信号によりポンプ41が停止されることになる。したがっ
て、制御部45における局部的な故障だけで断水状態にな
ってしまい、場合によっては異常運転に基づくより重大
な事故が誘発される可能性もないとはいえない。さりと
て、上記制御部45における全ての故障に対応し得るよう
な故障信号発生手段や代替機構等を完備することは実用
上必ずしも合理的であるとは考えられず、かつ大幅なコ
スト増をもたらすことになる。That is, when a normal variable speed operation is being performed, a. When a contact failure or other failure occurs in the opening / closing control unit 54, b. A predetermined failure signal is transmitted despite the failure of the inverter 49. If the pressure detector 44 fails and sends an abnormal signal corresponding to a pressure lower than the actual pressure, no failure signal is sent, so that the switching means 48 does not operate and the pump 41 starts operating. It has not been switched to constant speed operation. When the abnormal signal from the pressure detecting section 44 continues for a predetermined time or more, the pump 41 is stopped by the cutoff signal from the determining section 56. Therefore, the water is cut off only by a local failure in the control unit 45, and in some cases, there is no possibility that a more serious accident due to abnormal operation is induced. By the way, it is not considered that it is practically necessarily rational to complete a failure signal generating means and an alternative mechanism that can cope with all the failures in the control unit 45, and it causes a significant cost increase. become.
本発明は上述のような問題点を解決するためになされ
たもので、制御部および圧力検出部等における部分的な
不具合のためポンプが停止されたり、あるいは吐出側圧
力の異常低下が検出されたような場合などには、予め想
定された部分について自動的に故障の発生場所や真偽の
探索ならびに運転可能な対策を選定でき、断水事故の発
生および継続時間を最小限にとどめ得る可変速ポンプ装
置を安価に提供することを目的とする。The present invention has been made in order to solve the above-described problems, and the pump has been stopped due to a partial failure in the control unit and the pressure detection unit, or an abnormal decrease in the discharge side pressure has been detected. In such a case, a variable speed pump that can automatically search for the place where a failure has occurred and the truth and truth and select operable measures for the assumed part, and minimize the occurrence and duration of water outage accidents An object is to provide an apparatus at low cost.
本発明は、ポンプの吐出側圧力を検出する第１の圧力
検出部と、この第１の圧力検出部からの信号に応じて前
記ポンプの運転速度を可変制御して前記ポンプの通常運
転を行う可変速運転制御部と、前記可変速運転制御部と
代替可能な前記ポンプを定周波数電源により定速運転す
るための定速運転制御部と、前記第１の圧力検出部と代
替可能な前記ポンプの吐出側圧力を検出するための第２
の圧力検出部と、前記第１の圧力検出部で検出される検
出圧力が所定圧力以下となる状態が所定時間連続するの
を検出する異常検出手段と、この異常現象が検出される
と、試行錯誤的に前記第１の圧力検出部から前記第２の
圧力検出部へ代替、前記可変速運転制御部から前記定速
運転制御部へ代替させて、前記ポンプの吐出側圧力が上
昇する兆候をもたらす前記圧力検出部と前記制御部との
組み合わせを探索する再開運転探索手段と、前記ポンプ
の吐出側圧力が上昇する運転を探索したときは、同探索
した圧力検出部と制御部との組み合わせで前記ポンプを
運転させる運転選択手段とを具備することを特徴とする
ものである。The present invention performs a normal operation of the pump by variably controlling an operation speed of the pump in accordance with a first pressure detection unit that detects a discharge side pressure of the pump and a signal from the first pressure detection unit. A variable speed operation control unit, a constant speed operation control unit for performing a constant speed operation of the pump which can be substituted for the variable speed operation control unit by a constant frequency power supply, and the pump which can be substituted for the first pressure detection unit To detect the discharge side pressure of
A pressure detecting section, abnormality detecting means for detecting that the state where the pressure detected by the first pressure detecting section becomes equal to or lower than a predetermined pressure continues for a predetermined time, and a trial is performed when this abnormal phenomenon is detected. By mistake, the first pressure detection unit is replaced with the second pressure detection unit, and the variable speed operation control unit is replaced with the constant speed operation control unit. The resumption operation search means for searching for a combination of the pressure detection unit and the control unit to be provided, and when searching for an operation in which the discharge side pressure of the pump increases, a combination of the searched pressure detection unit and control unit is used. Operation selection means for operating the pump.
本発明は上述のように構成されているので、通常運転
の際、ポンプの吐出側圧力が所定圧力以下となる状態が
所定時間連続すると、試行錯誤的に通常運転で用いてい
る第１の圧力検出部を第２の圧力検出部へ代替させたり
同じく可変速運転制御部を定速運転制御部へ代替させ
て、ポンプの吐出側圧力が上昇する兆候をもたらす前記
圧力検出部と前記制御部との組み合わせを探索する。Since the present invention is configured as described above, during normal operation, if the state where the discharge side pressure of the pump becomes equal to or lower than the predetermined pressure continues for a predetermined time, the first pressure used in normal operation is determined by trial and error. The pressure detection unit and the control unit, which replace the detection unit with the second pressure detection unit or also replace the variable speed operation control unit with the constant speed operation control unit and cause a sign that the discharge side pressure of the pump increases. Search for combinations of.
この探索の結果、ポンプの吐出側圧力が上昇する運転
を探索したときは、同探索した圧力検出部と制御部との
組み合わせで前記ポンプを運転させ、自動的に代替機能
に切替える。As a result of this search, when an operation in which the discharge side pressure of the pump increases is searched, the pump is operated by a combination of the searched pressure detection unit and control unit, and the function is automatically switched to the alternative function.
これにより、圧力検出部および（または）可変速運転
制御部、定速運転制御部における実際のまたは見掛けの
部分的故障等によりポンプが停止されるような場合であ
っても、各機器からの故障信号に依存することなく、確
実に運転の切り替えが行われるようになり、コスト的な
負担を抑えつつ断水の影響を最小に抑えることができ
る。As a result, even if the pump is stopped due to an actual or apparent partial failure in the pressure detection unit and / or the variable speed operation control unit or the constant speed operation control unit, the failure from each device may occur. The operation can be reliably switched without depending on the signal, and the influence of water cutoff can be suppressed to a minimum while suppressing the cost burden.
以下、本発明について図示の一実施例を参照しながら
説明する。Hereinafter, the present invention will be described with reference to one embodiment shown in the drawings.
第１図においてポンプ１の駆動用電動機２は、吐出側
流路３に設けられた第１の圧力検出部４および第２の圧
力検出部５から制御部６に入力される信号のいずれかに
応じて制御されるように構成されている。In FIG. 1, the drive motor 2 of the pump 1 is connected to one of the signals input to the control unit 6 from the first pressure detection unit 4 and the second pressure detection unit 5 provided in the discharge side flow path 3. It is configured to be controlled accordingly.
上記制御部６は、第２図に例示するように可変速運転
制御部７、定速運転制御部８、上記電動機２を上記可変
速運転制御部７と定速運転制御部８とに選択的に連携さ
せるための第１の切替手段９、上記可変速運転制御部７
および定速運転制御部８を上記両圧力検出部４と５とに
選択的に連携させるための第２の切替手段10ならびに、
上記可変速運転制御部７から送出される故障信号および
上記両圧力検出部4,5から第２の切替手段10を経て送出
される信号に応じて上記両切替手段9,10を制御可能な選
択部11を備えている。The control unit 6 selectively controls the variable speed operation control unit 7, the constant speed operation control unit 8, and the electric motor 2 as the variable speed operation control unit 7 and the constant speed operation control unit 8 as illustrated in FIG. Switching means 9 for coordinating with the variable speed operation control unit 7
And second switching means 10 for selectively causing the constant-speed operation control unit 8 to cooperate with the pressure detection units 4 and 5;
Selection that can control both switching means 9 and 10 in accordance with the failure signal sent from variable speed operation control section 7 and the signal sent from both pressure detecting sections 4 and 5 through second switching means 10 A unit 11 is provided.
図示例においては、上記可変速運転制御部７は、定周
波数電源から電動機２への入力回路に設けられたインバ
ータ12および主開閉器13、目標圧力を設定するための圧
力設定部14、上記目標圧力と吐出側圧力との偏差を補正
するための変速信号を送出可能な演算部15、吐出側圧力
が連続して所定下限値以下の時間が所定値以上になった
とき所定の遮断信号を送出可能な判定部16ならびに、こ
の判定部16からの信号に応じて上記主開閉器13を開閉可
能な開閉制御部17を備えている。In the illustrated example, the variable speed operation control unit 7 includes an inverter 12 and a main switch 13 provided in an input circuit from the constant frequency power supply to the electric motor 2, a pressure setting unit 14 for setting a target pressure, An arithmetic unit 15 capable of transmitting a shift signal for correcting a deviation between the pressure and the discharge side pressure, and transmitting a predetermined cutoff signal when the discharge side pressure continuously exceeds a predetermined lower limit value for a time equal to or more than a predetermined value. A possible determination unit 16 and an open / close control unit 17 that can open and close the main switch 13 in response to a signal from the determination unit 16 are provided.
また、上記定速運転制御部８は上記定周波数電源から
電動機２への直接の入力回路に設けられた副開閉器18、
吐出側圧力が連続して所定下限値以下の時間が所定値以
上になったとき所定の遮断信号を送出可能な判定部19お
よび、この判定部19からの信号に応じて上記副開閉器18
を開閉可能な開閉制御部20を備えている。The constant-speed operation control unit 8 includes a sub-switch 18 provided in a direct input circuit from the constant-frequency power supply to the electric motor 2,
A determination unit 19 capable of transmitting a predetermined shut-off signal when the discharge side pressure continuously exceeds a predetermined lower limit value becomes equal to or greater than a predetermined value, and the sub-switch 18 according to a signal from the determination unit 19
An opening / closing control unit 20 that can open and close is provided.
さらに、上記第１の切替手段９は上記主開閉器13およ
び副開閉器18への各遮断信号を上記選択部11からの信号
に応じて選択的に開閉するようになっており、上記第２
の切替手段10は上記選択部11からの信号に応じて上記第
１の圧力検出部４および第２の圧力検出部５のいずれか
一方の出力信号を可変速運転制御部７、定速運転制御部
８および選択部11に導くようになっている。そして、上
記選択部11は上記インバータ12からの故障信号および、
上記第１の圧力検出部４または第２の圧力検出部５から
導かれた出力信号に応じ、かつ必要に応じて予め設定さ
れた適宜プログラムにしたがって上記第１の切替手段９
および第２の切替手段10を制御し得るようになってい
る。なお、図中21、22は必要に応じて設けられる信号変
換部である。Further, the first switching means 9 selectively opens and closes each cutoff signal to the main switch 13 and the sub-switch 18 in accordance with a signal from the selection section 11, and
The switching means 10 changes the output signal of one of the first pressure detecting section 4 and the second pressure detecting section 5 according to the signal from the selecting section 11 to the variable speed operation control section 7 and the constant speed operation control. It leads to the section 8 and the selection section 11. Then, the selection unit 11 outputs a failure signal from the inverter 12 and
The first switching means 9 according to an output signal guided from the first pressure detecting section 4 or the second pressure detecting section 5 and according to an appropriate program set in advance as necessary.
And the second switching means 10 can be controlled. In the figure, reference numerals 21 and 22 denote signal conversion units provided as needed.
つぎに、上述のように構成された装置の動作について
説明する。Next, the operation of the device configured as described above will be described.
正常な運転状態においては、上記第１の圧力検出部４
によって検出された吐出側圧力が、圧力設定部14に設定
された目標圧力と等しくなるように、演算部15からの変
速信号によってインバータ12の出力周波数が制御され、
ポンプ１は電動機２を介して可変速運転されている。In a normal operation state, the first pressure detection unit 4
The output frequency of the inverter 12 is controlled by the shift signal from the calculation unit 15 so that the discharge-side pressure detected by the control unit 15 is equal to the target pressure set in the pressure setting unit 14.
The pump 1 is operated at a variable speed via the electric motor 2.
このような運転状態にあるとき吐出側圧力が所定値以
下の状態が所定時間以上連続すると、判定部16、19から
の遮断信号により主開閉器13および副開閉器18が共に開
状態となる。すなわち、ポンプ１は過剰需要が原因で停
止され、故障がなくても断水状態になる場合もある。In such an operation state, when the state in which the discharge side pressure is equal to or less than the predetermined value continues for a predetermined time or more, both the main switch 13 and the sub-switch 18 are opened by the cutoff signals from the determination units 16 and 19. That is, the pump 1 may be stopped due to excessive demand, and may be in a water-cut state even if there is no failure.
また、インバータ12から故障信号が送出されると、選
択部11からの信号により第１の切替手段９が図示の主開
閉器13側から副開閉器18側に切替えられ、ポンプ１は定
速運転状態になる。すなわち、制御部６において局部的
な故障が生じてもポンプ１は停止されないようになって
いる。When a failure signal is sent from the inverter 12, the first switching means 9 is switched from the main switch 13 side to the sub switch 18 side by a signal from the selection unit 11, and the pump 1 is operated at a constant speed. State. That is, even if a local failure occurs in the control unit 6, the pump 1 is not stopped.
さらに、故障の有無に拘らずポンプ１が停止したり、
あるいは吐出側圧力の異常低下が検出されたような場合
などには、予め設定されたプログラムに従って選択部11
から送出される信号により第１、第２の切替手段９、10
が種々に切替えられ、これによって運転可能な組合せの
探索が自動的に行われる。Furthermore, the pump 1 stops regardless of whether there is a failure,
Alternatively, when an abnormal decrease in the discharge side pressure is detected, the selection unit 11 is performed in accordance with a preset program.
From the first and second switching means 9 and 10
Are switched in various ways, so that a search for a drivable combination is automatically performed.
すなわち第３図に例示するように、まずイ段階におい
て第１の切替手段10により第１の圧力検出部４が第２の
圧力検出部５に置換され、その結果第２の圧力検出部５
の検出圧力が正常であれば第１の圧力検出部４が故障で
あると判定され、第２の圧力検出部５による可変速運転
が行われる。That is, as illustrated in FIG. 3, first, the first pressure detecting section 4 is replaced by the second pressure detecting section 5 by the first switching means 10 in the step (a), and as a result, the second pressure detecting section 5
If the detected pressure is normal, it is determined that the first pressure detecting unit 4 has failed, and the second pressure detecting unit 5 performs variable speed operation.
上記イ段階における置換の結果第２の圧力検出部５の
検出圧力が正常でない場合には、ロ段階において第１の
圧力検出部４に復元され、さらにハ段階において第１の
切替手段９により主開閉器13から副開閉器18に切替えら
れる。その結果第１の圧力検出部４の検出圧力が正常で
あれば可変速運転制御部７が故障であると判定され、第
１の圧力検出部４による定速運転制御が行われることに
なる。If the pressure detected by the second pressure detecting unit 5 is not normal as a result of the replacement in the above step a, the pressure is restored to the first pressure detecting unit 4 in the step b, and the first switching means 9 further supplies the main pressure in the step c. The switch 13 is switched to the sub switch 18. As a result, if the pressure detected by the first pressure detection unit 4 is normal, it is determined that the variable speed operation control unit 7 is out of order, and the constant speed operation control by the first pressure detection unit 4 is performed.
上記イ段階における切替の結果第１の圧力検出部４の
検出圧力が正常でない場合には、ニ段階において第２の
切替手段10により第１の圧力検出部４が第２の圧力検出
部５に置換され、その結果第２の圧力検出部５の検出圧
力が正常であれば第１の圧力検出部４および可変速運動
制御部７が故障であると判定され、第２の圧力検出部５
による定速運転が行われる。そして、上記ニ段階におけ
る置換の結果第２の圧力検出部５の検出圧力が正常でな
い場合には、電動機２を含むポンプ１が故障であると判
定されて停止される。If the pressure detected by the first pressure detecting section 4 is not normal as a result of the switching in the above step a, the first pressure detecting section 4 is switched to the second pressure detecting section 5 by the second switching means 10 in the second step. If the pressure is replaced and the detected pressure of the second pressure detecting unit 5 is normal, it is determined that the first pressure detecting unit 4 and the variable speed motion control unit 7 are out of order.
Is performed at a constant speed. If the pressure detected by the second pressure detector 5 is not normal as a result of the replacement in the two stages, the pump 1 including the electric motor 2 is determined to be faulty and is stopped.
すなわち、上述のように構成された装置においては、
制御部６および圧力検出部４等に故障を生じ、かつ故障
信号が送出されない場合でも、切替手段９、10および選
択部11などにより運転可能な状態に自動的に切替えられ
るので、断水の影響を最小にすることができる。しか
も、そのための付加部分が第２の圧力検出部５、第２の
切替手段10および選択部11などと僅少かつ安価であるの
で、コスト増も僅かですむことになる。That is, in the device configured as described above,
Even when a failure occurs in the control unit 6 and the pressure detection unit 4 and the failure signal is not transmitted, the operation is automatically switched to the operable state by the switching units 9 and 10 and the selection unit 11 and the like, so that the influence of the water outage is reduced. Can be minimized. In addition, since the additional parts for this are very small and inexpensive, such as the second pressure detecting section 5, the second switching means 10, the selecting section 11, and the like, the cost is slightly increased.
なお、本発明は上記実施例のみに限定されるものでは
ない。たとえば、上記両切替手段９、10による切替順序
や切替種類などは第３図とは異なるものであってもよ
く、要すれば上記ロ段階やニ段階などを省略してもよ
い。また、上述のような順次切替方式の代わりに適宜の
疑似故障発生手段を用いることも可能である。さらに、
上記圧力検出部４、５は適宜様式のものでよいが、たと
えば出力信号を前者ではアナログ式、後者ではON/OFF式
にするとか、これら両方式を一つ兼ね備えるようなもの
であってもよい。その他、本発明の要旨とするところの
範囲内で種々の変更ないし応用が可能である。It should be noted that the present invention is not limited to only the above embodiment. For example, the order of switching by the two switching means 9 and 10 and the type of switching may be different from those shown in FIG. 3, and if necessary, the steps B and D may be omitted. Further, instead of the above-described sequential switching method, it is also possible to use appropriate pseudo failure generating means. further,
The pressure detectors 4 and 5 may be of an appropriate type. For example, the output signal may be of an analog type in the former, an ON / OFF type in the latter, or a combination of both types. . In addition, various changes and applications are possible within the scope of the gist of the present invention.
本発明によれば、制御部、圧力検出部等における部分
的な不具合のためにポンプの吐出側圧力の所定圧力以下
となる状態が所定時間連続するようなことが起きると、
試行錯誤的に制御部の代替、圧力検出部の代替が行われ
て、吐出側圧力が上昇する運転が可能な制御部と圧力検
出部との組み合わせが探索され、同探索した組み合わせ
によるポンプの運転を行うので、制御部の各部、圧力検
出部等に故障を検出する機能を設けなくとも揚水再開が
可能となり、圧力検出部および（または）可変速運転制
御部、定速運転制御部における実際のまたは見掛けの部
分的故障等によりポンプが停止されるような場合であっ
ても、各機器からの故障信号に依存することなく、確実
に運転の切り替えを行うことができる。According to the present invention, when a state where the pressure on the discharge side of the pump becomes equal to or lower than a predetermined pressure for a predetermined time occurs due to a partial malfunction in the control unit, the pressure detection unit, and the like,
Substitution of the control unit and substitution of the pressure detection unit are performed by trial and error, and a combination of the control unit and the pressure detection unit capable of increasing the discharge pressure is searched for, and the pump is operated by the searched combination. Therefore, pumping can be restarted without providing a function for detecting a failure in each part of the control unit, the pressure detection unit, and the like, and the actual operation in the pressure detection unit and / or the variable speed operation control unit and the constant speed operation control unit is performed. Alternatively, even in a case where the pump is stopped due to an apparent partial failure or the like, the operation can be reliably switched without depending on a failure signal from each device.
したがって、コスト的な負担を抑えつつ断水の影響を
最小に抑えることができる。Therefore, it is possible to minimize the effect of water interruption while suppressing the cost burden.
第１図は本発明の一実施例を示す系統図、第２図は同例
の制御部を示すブロック図、第３図は同例の動作説明用
線図、第４図は従来例を示す系統図、第５図は同例の制
御部を示すブロック図である。 １……ポンプ、２……電動機、３……吐出側流路、4,5
……圧力検出部、７……可変速運転制御部、８……定速
運転制御部、9,10……切替手段、11……選択部、12……
インバータ。FIG. 1 is a system diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing a control section of the same example, FIG. 3 is a diagram for explaining the operation of the same example, and FIG. 4 shows a conventional example. FIG. 5 is a block diagram showing a control unit of the same example. 1 ... pump, 2 ... electric motor, 3 ... discharge side flow path, 4,5
...... Pressure detection unit, 7 ... Variable speed operation control unit, 8 ... Constant speed operation control unit, 9,10 ... Switching means, 11 ... Selection unit, 12 ...
Inverter.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) F04B 49/00 - 51/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 6 , DB name) F04B 49/00-51/00
Claims (1)
検出部と、 この第１の圧力検出部からの信号に応じて前記ポンプの
運転速度を可変制御して前記ポンプの通常運転を行う可
変速運転制御部と、 前記可変速運転制御部と代替可能な前記ポンプを定周波
数電源により定速運転するための定速運転制御部と、 前記第１の圧力検出部と代替可能な前記ポンプの吐出側
圧力を検出するための第２の圧力検出部と、 前記第１の圧力検出部で検出される検出圧力が所定圧力
以下となる状態が所定時間連続するのを検出する異常検
出手段と、 この異常現象が検出されると、試行錯誤的に前記第１の
圧力検出部から前記第２の圧力検出部へ代替、前記可変
速運転制御部から前記定速運転制御部へ代替させて、前
記ポンプの吐出側圧力が上昇する兆候をもたらす前記圧
力検出部と前記制御部との組み合わせを探索する再開運
転探索手段と、 前記ポンプの吐出側圧力が上昇する運転を探索したと
き、同探索した圧力検出部と制御部との組み合わせで前
記ポンプを運転させる運転選択手段と を具備することを特徴とする可変速ポンプ装置。A first pressure detecting section for detecting a discharge side pressure of the pump; and a variably controlling an operation speed of the pump in accordance with a signal from the first pressure detecting section to perform a normal operation of the pump. A variable speed operation control unit to perform; a constant speed operation control unit for performing a constant speed operation of the pump, which can be substituted for the variable speed operation control unit, by a constant frequency power supply; A second pressure detecting unit for detecting a discharge side pressure of the pump, and an abnormality detecting unit for detecting that a state in which the detected pressure detected by the first pressure detecting unit is equal to or lower than a predetermined pressure continues for a predetermined time. When this abnormal phenomenon is detected, the first pressure detection unit is replaced by the second pressure detection unit by trial and error, and the variable speed operation control unit is replaced by the constant speed operation control unit. A sign that the pressure on the discharge side of the pump increases. A resumption operation search means for searching for a combination of the pressure detection unit and the control unit, and when searching for an operation in which the discharge side pressure of the pump increases, the search is performed in combination with the searched pressure detection unit and the control unit. A variable speed pump device comprising: operation selection means for operating the pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9231790A JP2971507B2 (en) | 1990-04-09 | 1990-04-09 | Variable speed pump device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9231790A JP2971507B2 (en) | 1990-04-09 | 1990-04-09 | Variable speed pump device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03294676A JPH03294676A (en) | 1991-12-25 |
| JP2971507B2 true JP2971507B2 (en) | 1999-11-08 |
Family
ID=14051021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9231790A Expired - Fee Related JP2971507B2 (en) | 1990-04-09 | 1990-04-09 | Variable speed pump device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2971507B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006029234A (en) * | 2004-07-16 | 2006-02-02 | Kawamoto Pump Mfg Co Ltd | Automatic water supply device |
| CN106593843B (en) * | 2017-01-16 | 2018-07-17 | 三禾电器(福建)有限公司 | A kind of constant pressure automatic running control method of speed electrical pumps |
-
1990
- 1990-04-09 JP JP9231790A patent/JP2971507B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03294676A (en) | 1991-12-25 |
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