JP2984468B2 - Control method of automatic water supply device - Google Patents
Control method of automatic water supply deviceInfo
- Publication number
- JP2984468B2 JP2984468B2 JP4172158A JP17215892A JP2984468B2 JP 2984468 B2 JP2984468 B2 JP 2984468B2 JP 4172158 A JP4172158 A JP 4172158A JP 17215892 A JP17215892 A JP 17215892A JP 2984468 B2 JP2984468 B2 JP 2984468B2
- Authority
- JP
- Japan
- Prior art keywords
- current
- pump
- parallel
- disconnection
- water supply
- 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
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、運転電流を介して選択
的に並・解列運転される複数のポンプを備えた自動給水
装置の制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling an automatic water supply apparatus having a plurality of pumps that are selectively operated in parallel and parallel operation via an operating current.
【０００２】[0002]
【従来の技術】構造複雑な大流量検出部を要せずに複数
ポンプの並・解列制御を行うため本出願人が先に提案し
た特願平４−４３６００号においては、ポンプ運転電流
の和が並列起動電流以上になると並列起動し、並列運転
中における運転電流の和が解列電流の和以下であれば解
列候補ポンプを解列し、あるいは運転電流が個別解列電
流以下になった場合にも解列候補ポンプを解列するよう
に構成されている。2. Description of the Related Art In order to perform parallel / parallel control of a plurality of pumps without requiring a complicated large flow rate detecting unit, Japanese Patent Application No. 4-43600 previously proposed by the present applicant has disclosed a pump operating current. When the sum is equal to or greater than the parallel starting current, the pumps are started in parallel.If the sum of the operating currents during the parallel operation is equal to or less than the sum of the disconnection currents, the disconnection candidate pump is disconnected, or the operating current is equal to or less than the individual disconnection current. In such a case, the disconnection candidate pump is also disconnected.
【０００３】上述のように運転電流Ｉの和ΣＩと解列電
流Ｉc の和ΣＩc とを比較し、解列条件をΣＩ≦ΣＩc
とすれば、給水圧力を一定にするために設けられた減圧
弁の設定圧力に誤差があり、例えばポンプ２台の場合
に、ΣＩ＝（１０＋８）Ａ、ΣＩc ＝（９．５＋９．
５）ＡとなってもΣＩ＜ΣＩc であるから、解列流量が
ほぼ一定で、最適制御が行われる。[0003] compared with the sum .SIGMA.I c sum .SIGMA.I and Kairetsu current I c of the driving current I as described above, the disconnection condition .SIGMA.I ≦ .SIGMA.I c
If there is an error in the set pressure of the pressure reducing valve provided to the water supply pressure constant, for example in the case of two pumps, ΣI = (10 + 8) A, ΣI c = (9.5 + 9.
5) Since even if an A is .SIGMA.I <.SIGMA.I c, almost constant disconnection flow, optimum control is performed.
【０００４】[0004]
【発明が解決しようとする課題】上記提案のものにおい
ては、ポンプ２台の場合に一方のポンプが空転して例え
ばΣＩ＝（５＋１２）ＡとなってもΣＩ＜ΣＩc である
ので、空転ポンプが解列されたとき他方のポンプの並列
起動電流Ｉb が運転電流１２Ａよりも少ない場合には、
空転ポンプが再び起動されてしまうことになる。In those proposed above [0005] are, because it is in the case of two pumps and one pump is idling e.g. ΣI = (5 + 12) even if the A ΣI <ΣI c, idle pump If the parallel starting current I b of the other pump when collapsed column is less than the operating current. 12A,
The idle pump will be started again.
【０００５】このような不具合を防止するためポンプご
とに運転電流Ｉと解列電流Ｉc とを比較し、いずれのポ
ンプにおいてもＩ≦Ｉc が成立する場合には、上述同様
に空転ポンプにおいてはＩ1 ＝５Ａ、Ｉc1＝９．５Ａ、
他方のポンプにおいてはＩ2＝１２Ａ、Ｉc2＝９．５Ａ
とすれば、Ｉ1 ＜Ｉc1、Ｉ2 ＞Ｉc2であるから解列され
ることはない。そして、例えばＩ2 ＝９Ａ＜Ｉc2となる
まで流量が減少したとき空転ポンプが解列されても、他
方のポンプにおいてはＩ2 ＜Ｉb2となるため空転ポンプ
が再起動されることはない。[0005] If such is compared with the operating current I and Kairetsu current I c for each pump to prevent problems, I ≦ I c is satisfied in any of the pump is in idle pump above likewise Is I 1 = 5A, I c1 = 9.5A,
In the other pump, I 2 = 12 A, I c2 = 9.5 A
Then, since I 1 <I c1 , I 2 > I c2 , no disconnection occurs. Then, for example I2 = 9A <be idle pump when the flow rate is reduced until the I c2 is Kairetsu, in other pump I 2 <is idle pump for the I b2 will not be restarted.
【０００６】しかしながら、図２に例示するように送水
に異常はないが各ポンプの運転電流に偏差がある場合
は、運転電流が大きい方（Ｉ1 ＞Ｉ2 ）のポンプはＩ1
≦Ｉcとなるまで解列されないので、解列流量ｑが小さ
くなり、電力ロスを招くことになる。However, as shown in FIG. 2, when there is no abnormality in the water supply but there is a deviation in the operating current of each pump, the pump with the larger operating current (I 1 > I 2 ) has the I 1
Since the disconnection is not performed until ≦ I c , the disconnection flow rate q decreases and power loss occurs.
【０００７】本発明は上記事情のもとになされたもの
で、ポンプ相互間の運転電流偏差に影響されることなく
最適流量での解列が可能で、空転発生時にも並・解列が
反復されることのない自動給水装置の制御方法を提供す
ることを目的とする。The present invention has been made based on the above circumstances, and enables disconnection at an optimum flow rate without being affected by operating current deviation between pumps. It is an object of the present invention to provide a control method of an automatic water supply device which is not performed.
【０００８】[0008]
【課題を解決するための手段】本発明は、流量検出部か
らの停止信号入力時点における停止時電流および、圧力
検出部からの始動信号入力直前における並列前電流を用
いて各ポンプ個別の並列起動電流および解列電流をそれ
ぞれ演算・記憶する自動給水装置の制御方法において、
全ての停止信号が非入力状態の場合は個別運転電流の和
が解列電流の和以下のとき、１つ以上の停止信号が入力
状態の場合は各ポンプとも運転電流が解列電流以下のと
きはそれぞれ解列することを特徴とするものである。According to the present invention, each of the pumps is individually started in parallel by using a current at the time of stop at the time of input of a stop signal from the flow rate detector and a current before parallel immediately before input of a start signal from the pressure detector. In a control method of an automatic water supply device that calculates and stores a current and a disconnection current, respectively,
When all stop signals are in the non-input state, the sum of the individual operating currents is less than or equal to the sum of the disconnection currents, and when one or more stop signals are in the input state, the operating currents of both pumps are less than the disconnection currents Are characterized in that they are disconnected.
【０００９】[0009]
【作用】上記の構成において、停止信号の入力状態に応
じて解列条件を選択的に設定するようにしたので、ポン
プ相互間の運転電流偏差に影響されることなく最適流量
での解列が可能で、かつ空転発生時における並・解列の
反復が防止される。In the above configuration, since the disconnection condition is selectively set according to the input state of the stop signal, the disconnection at the optimum flow rate can be performed without being affected by the operating current deviation between the pumps. It is possible, and repetition of parallel / parallel disconnection when idling occurs is prevented.
【００１０】[0010]
【実施例】以下、本発明につき図１および図２に示す一
実施例を参照しながら説明する。図１において、２組の
ポンプ１，２は電動機３，４を備え、吸込側は水槽５に
導かれるとともに、吐出側は流量検出部６，７および逆
止弁８，９を介して合流管１０に並列接続されている。
上記合流管１０には、圧力検出部１１および蓄圧タンク
１２が接続されている。上記電動機３，４の入力回路１
３，１４には電流検出部１５，１６がそれぞれ設けられ
ている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in FIGS. In FIG. 1, two sets of pumps 1 and 2 are provided with electric motors 3 and 4, the suction side is guided to a water tank 5, and the discharge side is connected via a flow detecting unit 6, 7 and a check valve 8, 9. 10 are connected in parallel.
The merging pipe 10 is connected to a pressure detection unit 11 and a pressure accumulation tank 12. Input circuit 1 for motors 3 and 4
Current detectors 15 and 16 are provided in 3 and 14, respectively.
【００１１】図２に例示するように、上記流量検出部
６，７は吐出流量Ｑが所定の停止流量Ｑ0 まで低下した
ときそれぞれ停止信号を送出するように構成されてい
る。上記圧力検出部１１は合流管１０内の水圧Ｈが所定
の始動圧力Ｈ0 まで低下したとき始動信号を送出するよ
うに構成されている。上記電流検出部１５，１６は上記
電動機３，４の運転電流Ｉに対応する電流信号をそれぞ
れ送出するように構成されている。上記停止信号、始動
信号および電流信号は、それぞれ制御部１７に導かれて
いる。As shown in FIG. 2, each of the flow rate detectors 6 and 7 is configured to send a stop signal when the discharge flow rate Q drops to a predetermined stop flow rate Q 0 . The pressure detector 11 is configured to send a start signal when the water pressure H in the merge pipe 10 has decreased to a predetermined start pressure H 0 . The current detectors 15 and 16 are configured to transmit current signals corresponding to the operating currents I of the electric motors 3 and 4, respectively. The stop signal, start signal, and current signal are each guided to the control unit 17.
【００１２】上記制御部１７は上記停止信号の入力時点
における停止時電流Ｉ0 および、上記始動信号の入力直
前における並列前電流Ｉa をそれぞれ検出・記憶する手
段、これら停止時電流Ｉ0 および並列前電流Ｉa を用い
て各ポンプ個別の並列起動電流Ｉb および解列電流Ｉc
をそれぞれ演算・記憶する手段、これら並列起動電流Ｉ
b の和ΣＩb および解列電流Ｉc の和ΣＩc をそれぞれ
演算・記憶する手段ならびに、これら手段の出力信号に
応じて上記ポンプ１，２を自動的に発停制御する手段等
を備えている。また、上記各記憶手段は新しいデータが
検出されるごとにそれぞれ記憶内容が更新されるように
なっている。[0012] The control unit 17 and the stop time of current I 0 at the input time of the stop signal, means for detecting and storing the respective parallel before current I a at the input immediately preceding the start signal, these standstill current I 0 and parallel each pump individual parallel start with pre current I a current I b and Kairetsu current I c
Means for calculating and storing the respective values, these parallel starting currents I
means for respectively calculating and storing b sum .SIGMA.I b and Kairetsu sum .SIGMA.I c of the current I c and, provided with means such as for automatically starting and stopping controlling the pumps 1, 2 in accordance with the output signals of these means I have. Each of the storage means is configured to update its storage content each time new data is detected.
【００１３】次に上記実施例の作用を説明する。なお、
各電流データはポンプごとに検出・記憶されるが、繁雑
を避けるため原則として上述同様の共通記号を用い、特
に必要ある場合はポンプ記号を付記して区分することと
する。Next, the operation of the above embodiment will be described. In addition,
Each current data is detected and stored for each pump. However, in order to avoid complication, the same common symbol as described above is used in principle, and if necessary, the pump symbol is added for classification.
【００１４】装備当初の試運転時等にポンプ１，２をそ
れぞれ単独運転すると、ＨがＨ0 まで低下したとき圧力
検出部１１からの始動信号に応じてポンプが始動される
とともに始動信号入力直前における並列前電流Ｉa が検
出・記憶される。ＱがＱ0 まで減少すれば流量検出部６
からの停止信号に応じてポンプが停止されるとともに停
止信号入力時点における停止時電流Ｉ0 が検出・記憶さ
れる。そして、記憶された並列前電流Ｉa および停止時
電流Ｉ0 を用いてポンプ１，２の並列起動電流Ｉb およ
び解列電流Ｉc がそれぞれ演算・記憶される。さらに、
各ポンプの並列起動電流Ｉb の和ΣＩb および解列電流
Ｉc の和ΣＩc がそれぞれ演算・記憶される。[0014] The pump 1 respectively when equipped initial commissioning such alone operation, the start signal input immediately before with H pump in response to the start signal from the pressure detecting unit 11 when lowered to H 0 is started The pre-parallel current Ia is detected and stored. If Q decreases to Q 0, the flow rate detector 6
In response to the stop signal from the pump, the pump is stopped, and the stop current I 0 at the time of input of the stop signal is detected and stored. Then, the parallel starting current I b and Kairetsu current I c of the pumps 1, 2 are calculated and respectively stored using the stored parallel before current I a and the stop time of current I 0. further,
Sum .SIGMA.I c sum .SIGMA.I b and Kairetsu current I c of the parallel starting current I b of each pump is calculated and stored.
【００１５】上述のようにして所要の電流データが整備
された後は、通常はポンプ１が運転中にＩ≧Ｉb になれ
ばポンプ２が並列起動され、その後Ｉ≦Ｉc になればポ
ンプ１が解列されてポンプ２の単独運転となる。この状
態でＩ≧Ｉb になればポンプ１が並列起動され、その後
にＩ≦Ｉc になればポンプ２が解列されてポンプ１の単
独運転となり、ＱがＱ0 まで減少すれば流量検出部６か
らの停止信号に応じてポンプ１も停止される。[0015] After the required current data as described above is developed, typically pump 2 is started in parallel if the I ≧ I b pump 1 is in operation, the pump if the subsequent I ≦ I c 1 is disconnected and the pump 2 is operated independently. In this state, if I ≧ I b , the pump 1 is started in parallel. If I ≦ I c , the pump 2 is disconnected and the pump 1 is operated independently. If Q decreases to Q 0, the flow rate is detected. The pump 1 is also stopped in response to a stop signal from the unit 6.
【００１６】そして、全ての停止信号が非入力状態の場
合はΣＩ≦ΣＩc のときＱ≦Ｑc で解列され、また、１
つ以上の停止信号が入力状態の場合はＩ1 ≦Ｉc1、Ｉ2
≦Ｉc2のとき解列される。[0016] Then, if all of the stop signal is in a non-input state is paralleled by Q ≦ Q c When .SIGMA.I ≦ .SIGMA.I c, also 1
When one or more stop signals are in the input state, I 1 ≦ I c1 , I 2
It is disconnected when ≦ I c2 .
【００１７】したがって、通常は各ポンプの運転電流に
偏差があっても最適流量で解列可能である。また、空転
が発生しても並・解列が反復されるようなことはないの
でポンプおよび電力開閉部などの損傷が防止され、かつ
解列時に有害な圧力低下を生ずることもない。さらに、
空転発生時に解列されることなく並列運転が継続する場
合は、流量検出部からの停止信号が所定時間以上継続し
たとき警報するようにしてもよい。Therefore, normally, even if there is a deviation in the operating current of each pump, the pump can be disconnected at the optimum flow rate. In addition, even if idling occurs, parallel and parallel disconnection are not repeated, so that damage to the pump and the power switch is prevented, and no harmful pressure drop occurs during disconnection. further,
In the case where the parallel operation is continued without being disconnected at the occurrence of the idling, an alarm may be issued when the stop signal from the flow rate detection unit continues for a predetermined time or more.
【００１８】なお、本発明は上記実施例のみに限定され
るものではなく、例えば、ポンプの数は３台以上であっ
ても適用可能である。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。The present invention is not limited to the above embodiment, but is applicable, for example, even when the number of pumps is three or more. In addition, various changes and applications are possible within the scope of the gist of the present invention.
【００１９】[0019]
【発明の効果】以上説明したように本発明によれば、ポ
ンプ相互間の運転電流偏差に影響されることなく最適流
量での解列が可能で、空転発生時にも並・解列が反復さ
れることのない自動給水装置の制御方法を提供すること
ができる。As described above, according to the present invention, disconnection at the optimum flow rate can be performed without being affected by the operating current deviation between the pumps. It is possible to provide a control method of the automatic water supply device without the need for the water supply device.
【図１】本発明の一実施例を示す系統図。FIG. 1 is a system diagram showing one embodiment of the present invention.
【図２】同実施例の流量（Ｑ）−水圧（Ｈ）特性およ
び、流量（Ｑ）−運転電流（Ｉ）特性を示す線図。FIG. 2 is a diagram showing a flow rate (Q) -water pressure (H) characteristic and a flow rate (Q) -operating current (I) characteristic of the embodiment.
６，７…流量検出部、１１…圧力検出部、１５，１６…
電流検出部、Ｉ…運転電流、Ｉ0 …停止時電流、Ｉa …
並列前電流、Ｉb …並列起動電流、Ｉc …解列電流。6, 7: flow rate detecting section, 11: pressure detecting section, 15, 16, ...
Current detector, I: operating current, I 0 : current at stop, I a :
Parallel before the current, I b ... parallel starting current, I c ... disconnecting current.
Claims (1)
ける停止時電流および、圧力検出部からの始動信号入力
直前における並列前電流を用いて各ポンプ個別の並列起
動電流および解列電流をそれぞれ演算・記憶する自動給
水装置の制御方法において、全ての停止信号が非入力状
態の場合は個別運転電流の和が個別解列電流の和以下の
とき、１つ以上の停止信号が入力状態の場合は各ポンプ
とも運転電流が解列電流以下のときにそれぞれ解列する
ことを特徴とする自動給水装置の制御方法。1. A parallel starting current and a disconnection current of each pump are calculated using a stop current at the time of inputting a stop signal from a flow rate detecting unit and a pre-parallel current immediately before input of a starting signal from a pressure detecting unit. In the control method of the automatic water supply device to be stored, when all the stop signals are in the non-input state, when the sum of the individual operation currents is equal to or less than the sum of the individual disconnection currents, and when one or more stop signals are in the input state, A control method for an automatic water supply device, wherein each pump is disconnected when an operation current is equal to or less than a disconnection current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4172158A JP2984468B2 (en) | 1992-06-30 | 1992-06-30 | Control method of automatic water supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4172158A JP2984468B2 (en) | 1992-06-30 | 1992-06-30 | Control method of automatic water supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0610842A JPH0610842A (en) | 1994-01-21 |
| JP2984468B2 true JP2984468B2 (en) | 1999-11-29 |
Family
ID=15936651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4172158A Expired - Lifetime JP2984468B2 (en) | 1992-06-30 | 1992-06-30 | Control method of automatic water supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2984468B2 (en) |
-
1992
- 1992-06-30 JP JP4172158A patent/JP2984468B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0610842A (en) | 1994-01-21 |
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