JPS60192896A - Control unit for pump - Google Patents

Control unit for pump

Info

Publication number
JPS60192896A
JPS60192896A JP4835684A JP4835684A JPS60192896A JP S60192896 A JPS60192896 A JP S60192896A JP 4835684 A JP4835684 A JP 4835684A JP 4835684 A JP4835684 A JP 4835684A JP S60192896 A JPS60192896 A JP S60192896A
Authority
JP
Japan
Prior art keywords
pressure
switch
timer
pump
flow rate
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.)
Pending
Application number
JP4835684A
Other languages
Japanese (ja)
Inventor
Akio Izaki
井崎 陽生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shibaura Mechatronics Corp
Original Assignee
Shibaura Engineering Works Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shibaura Engineering Works Co Ltd filed Critical Shibaura Engineering Works Co Ltd
Priority to JP4835684A priority Critical patent/JPS60192896A/en
Publication of JPS60192896A publication Critical patent/JPS60192896A/en
Pending legal-status Critical Current

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  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE:To reduce the axial output of a pump by continuing the operation via a flow switch when a timer is operated by both opening/closing actions of a pressure switch in the control unit for a pump. CONSTITUTION:A pressure switch Psw provided on the discharge conduit 2 side is set to be opened at a preset pressure or more and to be closed at a pressure less than the preset pressure. When a timer is operated by the closing action of the pressure switch Psw, the operation is continued while at least one of contacts of the timer and the flow switch Fsw is closed. When the timer is operated by the opening action of the pressure switch Psw, the operation is continued while at least one of contacts of the pressure switch Psw, the timer, and the flow switch Fsw is closed. Accordingly, the interval of the operation stop of the pump can be extended.

Description

【発明の詳細な説明】 本発明は主として家庭用のポンプの制御装置に関する。[Detailed description of the invention] The present invention mainly relates to a control device for a domestic pump.

従来より、井戸等からの給水あるいは給湯用に用いられ
るヒユーガルポンプやウェスコポンプ等においては、そ
の自動運転の方式として、一般にON圧とOFF圧とに
所要の高低差(つまりヒステリシス)を有する圧力スイ
ッチを例えばアキュームレータ等と組合せて用い、該圧
力スイッチをポンプ吐出圧によって開閉動作させて自動
運転を行なっているか、このような0N−OFF圧に高
低差のある圧力スイッチによるポンプの自動運転は下記
の理由により不利である。
Conventionally, in the case of Hugal pumps, Wesco pumps, etc. used for water supply from wells, etc., or for hot water supply, the automatic operation method generally uses a pressure switch that has a required height difference (i.e., hysteresis) between ON and OFF pressures. For example, the pressure switch is used in combination with an accumulator, etc., and the pressure switch is opened and closed depending on the pump discharge pressure for automatic operation. This is disadvantageous.

■ ヒユーガルポンプ等の特性は第1図の揚程−流量特
性線図のごとくなっているため、大流量域で圧力スイッ
チの開閉を行なわねばならない。
- Since the characteristics of a Hugal pump etc. are as shown in the head-flow characteristic diagram in Figure 1, the pressure switch must be opened and closed in a large flow rate range.

(d ON圧とOFF圧とが同圧の場合、つまりON−
OF F圧に高低差のない制御を行なう場合に比し、O
N圧とOFF圧との差圧(AP)分だけ締切圧を上げね
ばならず、仮に大流量を必要とせず管路に抵抗体を装入
して最大流量を抑えた場合でも、流量の多少に拘らず前
記差圧(AP)に相当する分大きな動力(軸出力)を必
要とする。
(d When ON pressure and OFF pressure are the same pressure, that is, ON-
Compared to the case where the OF pressure is controlled without any height difference, the O
The cut-off pressure must be increased by the differential pressure (AP) between the N pressure and the OFF pressure, and even if a large flow rate is not required and the maximum flow rate is suppressed by inserting a resistor into the pipeline, the flow rate will be slightly lower. Regardless, a large power (shaft output) is required corresponding to the differential pressure (AP).

殊にこの種のポンプは、その使用上給水、給湯の応答性
を良くする目的で圧力スイッチを比較的小容量のアキュ
ームレータと組合せて用いることが多く、上記■の欠点
は圧力スイッチの頻繁な開閉やチャタリングとし′で現
われ、圧力スイッチ延いてはポンプ寿命を縮めることに
なり、かつまたこの種ポンプの使用上は小水量までの連
続運転性がめられるために、通常(1) 流量スイッチ
と圧力スイッチとの組合せで小水量まで運転を継続させ
る、 (2] 圧力スイッチとタイマーの組合せでチャタリン
グを防止し、見かけ上止水量まで運転を継続させる、 等の方法が採られているが、前記il+ +21のいず
れの場合にも上記■の欠点を(前記(1)については■
の欠点も)解決することにはならないものである。特に
上記■の欠点は小水量で高揚程を定格点に持つ給水もし
くは給湯加圧用ポンプ等において顕著である。
In particular, this type of pump is often used in combination with a pressure switch and a relatively small-capacity accumulator in order to improve the responsiveness of water supply and hot water supply. (1) Flow rate switch and pressure switch (2) Combination of pressure switch and timer to prevent chattering and allow operation to continue until the apparent water level is reached. In any case, the drawback of ■ above (for (1) above, ■
(the shortcomings of) will not be resolved. In particular, the above drawback (2) is noticeable in water supply or hot water supply pressurizing pumps, etc., which have a small water volume and a high head as their rated point.

そこで、本発明者は、上記欠点を解消しポンプの軸出力
の低減を図るべく、ON圧とOFF圧とが同圧のつまり
0N−OFF圧に高低差を有さない圧力スイッチを用い
て、ポンプの運転制御を行なわんとしたものである。
Therefore, in order to eliminate the above drawbacks and reduce the shaft output of the pump, the present inventor used a pressure switch in which the ON pressure and the OFF pressure are the same pressure, that is, there is no difference in height between the 0N and OFF pressures. The purpose was to control the operation of the pump.

すなわち、0N−OFF圧に高低差を有する通常の圧力
スイッチを用いる場合は、第1図中(イ)線のごとき特
性を必要とするが、これは圧力スイッチのOFF圧まで
圧力を上げるために必要なだけで、一般にはこれにオリ
フィスその他の抵抗体を装入して最大流量つまり最大出
力を抑えて同図中(槓線のごとき特性で使用するが、上
述したように最大出力を抑えても軸出力の低減効果(特
に高揚程側での)はない。なお最大出力が上昇しすぎな
いようにポンプ室からの出口面積を絞った場合も同様で
ある。
In other words, when using a normal pressure switch that has a height difference between 0N and OFF pressures, the characteristics shown in line (a) in Figure 1 are required. Generally speaking, an orifice or other resistor is installed in this to suppress the maximum flow rate, or the maximum output, and it is used with characteristics similar to the ram wire shown in the figure, but as mentioned above, the maximum output can be suppressed. There is no effect of reducing the shaft output (especially on the high head side).The same is true when the outlet area from the pump chamber is narrowed to prevent the maximum output from increasing too much.

これに対し、OFF圧をON圧と同圧に設定した圧力ス
イッチを用いる場合は、第1図中のON圧とOFF圧と
の差圧(AP)分だけ揚程が少なくて済み、このときの
必要特性は同図中(ロ)線のごとくなり、仮に流量スイ
ッチとの組合せ使用により該流量スイッチの抵抗で同図
中(01のごとき特性となって、定格点において(ΔH
,)分だけ揚程が低下しても、上記(イ)線の特性から
揚程を低下させる場合に比し、(ΔH2)と(ΔH+)
との差に相当する分必要軸出力が少なくて済むことにな
り、従ってON圧とOFF圧とを同圧にしての制御を行
なうのが望ましいものである。
On the other hand, when using a pressure switch in which the OFF pressure is set to the same pressure as the ON pressure, the lift is reduced by the pressure difference (AP) between the ON pressure and the OFF pressure in Figure 1. The required characteristics are as shown in the (b) line in the same figure.If used in combination with a flow rate switch, the resistance of the flow rate switch would result in a characteristic like (01) in the figure, and at the rated point (ΔH
Even if the head is reduced by ,), (ΔH2) and (ΔH+)
Therefore, it is desirable to control the ON pressure and OFF pressure by keeping them at the same pressure.

本発明は、上記の点に着目して、ON圧とOFF圧とが
同圧の、つまり成る設定圧以上では開(OFF)となり
かつ以下では閉(ON)となる特殊な圧力スイッチを用
い、該圧力スイッチを小水量までの運転継続のための流
量スイッチと組合せたポンプの制御装置を提供しようと
したものである。この場合、アキュームレータへの蓄圧
差(締切圧とON圧との差)が少ないため、流量スイッ
チの働かない小水量使用時あるいは漏水程度の際には運
転時間つまり開閉インターバルが短かくなり、また起動
の際、流量スイッチが作動するまでに起動時の瞬時の圧
力上昇で圧力スイッチが切れてしまい、チャタリングを
起こすおそれがある。そこでこれらの問題を解決するた
めに、本発明においては、圧力スイッチめ閉動作または
開動作により作動して一定時間モータ電源の接点を閉し
るタイマーを流量スイッチと並列に設けて、運転を一時
継続させるようにしたものである。
Focusing on the above points, the present invention uses a special pressure switch in which the ON pressure and the OFF pressure are the same pressure, that is, the pressure switch becomes open (OFF) above the set pressure, and closes (ON) below. The present invention attempts to provide a pump control device in which the pressure switch is combined with a flow rate switch for continued operation up to a small amount of water. In this case, the accumulated pressure difference in the accumulator (difference between cut-off pressure and ON pressure) is small, so when using a small amount of water where the flow rate switch does not work or when there is a water leak, the operating time, that is, the opening/closing interval, will be shortened, and the opening/closing interval will be shortened. In this case, by the time the flow rate switch is activated, the instantaneous pressure increase at startup may cause the pressure switch to turn off, causing chattering. Therefore, in order to solve these problems, in the present invention, a timer is provided in parallel with the flow rate switch, which is activated by the closing or opening operation of the pressure switch to close the contacts of the motor power supply for a certain period of time, so that the operation can be temporarily stopped. It was designed to continue.

本発明は、ポンプの吐出水路側に設けられるとともに成
る設定圧以上では開となりかつ以下では閉となる圧力ス
イッチと、前記圧力スイッチの閉動作または開動作によ
り作動して一定時間モータ電源の開閉部接点を閉じるタ
イマーと前記タイマーと並列に接続された流量スイッチ
とを備え、前記タイマーが圧力スイッチの閉動作により
作動する場合はタイマーと流量スイッチの少なくとも一
つか、またタイマーが圧力スイッチの開動作により作動
する場合は圧力スイッチとタイマーと流量スイッチの少
なくとも一つが接点を閉じている間運転を継続するよう
構成してなるポンプの制御装置を特徴とする。
The present invention provides a pressure switch which is provided on the discharge waterway side of a pump and which opens when the pressure exceeds a set pressure and closes when the pressure falls below, and a part that opens and closes the motor power supply for a certain period of time by being activated by the closing or opening operation of the pressure switch. A timer that closes a contact and a flow rate switch connected in parallel with the timer, and when the timer is activated by the closing operation of the pressure switch, at least one of the timer and the flow rate switch, or the timer is activated by the opening operation of the pressure switch. The pump control device is characterized by being configured to continue operating while the contacts of at least one of a pressure switch, a timer, and a flow rate switch are closed when the pump is activated.

次に本発明の実施例を図面に基いて説明する。Next, embodiments of the present invention will be described based on the drawings.

系統図を示す第2図および回路図を示す第8図において
、(乃はヒユーガルポンプやウェスコポンプ等のポンプ
、(1)は吸込管、(2)は吐出水路、(AcC)はア
キュームレータを示す。(Psw)はポンプ(匂の吐出
水路(2)側に設けた圧力スイッチで、成る設定圧以上
では開となりかつ以下では閉と なるよう、つまりON圧とOFF圧とが同圧に設定され
たものからなる。通常前記設定圧はポンプの定格点に応
じてこれより若干高く定められる。(T)は前記圧力ス
イッチ(Psw)の閉動作または開動作により作動して
一定時間ポンプ(I’)のモータ電源の開閉部接点を閉
じるように設定したタイマーであり、このタイマー(T
)が圧力スイッチ(Psw)の閉動作により作動するも
のである場合は第3図のように圧力スイッチ(Psw)
と接続されて電源(3)とポンプfP)の駆動モーター
との間に介設されている。(Fsw)はポンプfPlの
吐出水路+21の一部に備えた流量スイッチであって前
記タイマー(1)と並列に接続されており、流量が一定
の小水量以上ある間接点が閉路してポンプ(Piの運転
を続けるよう設けられている。すなわち上記タイマー(
1)およびMEitスイッチ(Fsw)のいずれか一方
もしくは双方が開閉部接点を閉じている間ポンプ(I’
lの運転か継続するようになっている。
In FIG. 2 which shows a system diagram and FIG. 8 which shows a circuit diagram, (a) indicates a pump such as a Hugal pump or a Wesco pump, (1) indicates a suction pipe, (2) indicates a discharge waterway, and (AcC) indicates an accumulator. (Psw) is a pressure switch installed on the side of the pump (odor discharge channel (2)), and is set to open above the set pressure and close below the set pressure, that is, the ON pressure and OFF pressure are set to the same pressure. Normally, the set pressure is set slightly higher than this depending on the rated point of the pump. (T) is activated by the closing or opening operation of the pressure switch (Psw), and the pump (I') is operated for a certain period of time. This timer is set to close the opening/closing contact of the motor power supply.
) is activated by the closing operation of the pressure switch (Psw), as shown in Figure 3, the pressure switch (Psw)
The pump fP is connected to the pump fP and is interposed between the power source (3) and the drive motor of the pump fP). (Fsw) is a flow rate switch provided in a part of the discharge waterway +21 of the pump fPl, and is connected in parallel with the timer (1), and the joint point where the flow rate exceeds a certain small water volume is closed and the pump ( It is provided to continue operating the Pi. In other words, the above timer (
1) and MEit switch (Fsw), the pump (I'
1 operation continues.

第4図の回路図においては、上記実施例の構成における
タイマー回路中の機械的リレーもしくは半導体リレーよ
りなるモータ電源の開閉部(4)を独立にして電源(3
)とモーターとの間に介設し、流量スイッチ(Fsw)
 mよびタイマー(I′1が前記開閉部(4)を介して
ポンプfP)の運転を制御するように接続構成した場合
を示しており、開閉部(4)はタイマー(′1)が働ら
いている間たけでなく流量スイッチ(Fsw)が閉路し
ている間も閉路することになる。
In the circuit diagram of FIG. 4, the opening/closing part (4) of the motor power supply consisting of a mechanical relay or a semiconductor relay in the timer circuit in the configuration of the above embodiment is made independent of the power supply (3).
) and the motor, and a flow rate switch (Fsw)
This figure shows a case in which the opening/closing part (4) is connected so that the timer (I'1) and the timer (I'1) control the operation of the pump fP via the opening/closing part (4). The circuit is closed not only while the flow rate switch (Fsw) is closed, but also while the flow rate switch (Fsw) is closed.

また第5図の回路図においては、流量スイッチ(Fsw
)がタイマー01回路中のモータ電源開閉部を介して流
量スイッチ(Fsw)がポンプ(Plの運転を制御する
ように接続構成した場合を示しており、タイマー回路の
モータ電源開閉部は上記同様タイマー(1)が働らいて
いる間はもちろん、振号スイッチ(FSW) 7!+<
閉路している間も閉路することになる。
In addition, in the circuit diagram of Fig. 5, the flow rate switch (Fsw
) shows a case where the flow rate switch (Fsw) is connected to control the operation of the pump (Pl) via the motor power switch in the timer 01 circuit, and the motor power switch in the timer circuit is connected to the timer as above. While (1) is working, of course, the swing signal switch (FSW) 7!+<
While the circuit is closed, the circuit will also be closed.

さらに上記タイマー(1)が圧力スイッチ(Psw)の
開動作により作動するものである場合には、第6図のよ
うに圧力スイッチ(Psw)はタイマー〇〕と接続され
てかつタイマー(′I)とは側に電源+31とポンプ(
P)の駆動モータ(ロ)との間に介設接続されるもので
、この圧力スイッチ(Psw)とタイマー(1)および
これらと並列の流量スイッチ(Fsw)の少なくとも一
つが接点を閉じている間運転を継続するよう構成される
Further, if the timer (1) is activated by the opening operation of the pressure switch (Psw), the pressure switch (Psw) is connected to the timer 〇〕 and the timer ('I) is connected as shown in Fig. 6. And the power supply +31 and pump (
The pressure switch (Psw), the timer (1), and at least one of the flow rate switches (Fsw) in parallel with these have closed contacts. The system is configured to continue operating for an extended period of time.

上記の各実施例において、圧力スイッチ(Psw)を圧
力センサーとしての機能を持たせることにより、半導体
制御を行ない易(することも可能である。
In each of the above embodiments, semiconductor control can be easily performed by providing the pressure switch (Psw) with a function as a pressure sensor.

なお、上記の流量スイッチ(Fsw)は、吐出水路(2
)におけるアキュームレータ(Ac c )の上流側に
設けることも可能であるか、動作最小水量か太き(なる
ので、第2図のようにアキュームレ−タ(Ac c )
の下流側に設けておくのが小水量までの連続運転性等の
点から望ましい。
Note that the above flow rate switch (Fsw) is connected to the discharge waterway (2
) is possible to install it on the upstream side of the accumulator (Acc) in
It is desirable to install it on the downstream side from the viewpoint of continuous operation up to small water volumes.

上記の構成よりなる本発明の作動状態を、圧力スイッチ
(Psw)の閉動作により作動するタイマー(1)を備
えた場合について説明する。先ず、蛇口(5)を開くと
、吐出水路(2)の圧力が定格点に応じて定められた圧
力スイッチ(Psw)の開閉境界圧としての設定圧以下
となり、圧力スイッチ(Psw)が閉成(ON) L、
同時にタイマー(1)が作動してモータ電源の開閉部接
点が閉路し、ポンプ(P)が起動する。このポンプ起動
により吐出水路(2)が瞬時に前記設定圧以上となり、
圧力スイッチ(Psw)が直ちに開路(OFF)するこ
とになるが、前記タイマー(r)はそのまま作動を続け
、モータ電源の開閉部接点を閉路状態に保持しているた
め、ポンプ(P)はそのまま運転を継続する。
The operating state of the present invention having the above-mentioned configuration will be described in the case where the timer (1) is provided which is activated by the closing operation of the pressure switch (Psw). First, when the faucet (5) is opened, the pressure in the discharge waterway (2) becomes lower than the set pressure as the opening/closing boundary pressure of the pressure switch (Psw) determined according to the rated point, and the pressure switch (Psw) closes. (ON) L,
At the same time, the timer (1) is activated, the opening/closing contact of the motor power supply is closed, and the pump (P) is started. By starting this pump, the discharge waterway (2) instantly becomes equal to or higher than the set pressure.
The pressure switch (Psw) will immediately open (OFF), but the timer (r) will continue to operate and keep the motor power switch contact in the closed state, so the pump (P) will remain open. Continue driving.

続いて流量スイッチ(Fsw)が蛇口(5)からの吐出
水量に応じた吐出水路(2)内の流量を検知して閉路し
、従ってタイマー作動開始から一定時間経過後タイマー
(1)が切れるも、これと並列に接続された前記流量ス
イッチ(Fsw)が一定の小水量以上の流量である間は
そのまま閉路状態を保持し、ポンプCP+は運転を続け
る。またその間、蛇口(5)の開き具合等により吐出水
路(2)の圧力が圧力スイッチ(Psw)の開閉境界圧
つまりON圧およびOFF圧となる設定圧より高くなっ
ても、流量が一定の小水量以上ある間は流量スイッチ(
Fs、w)によりポンプ(P)の運転を続け、開閉つま
り運転、停止を繰返すことがない。
Subsequently, the flow rate switch (Fsw) detects the flow rate in the discharge waterway (2) according to the amount of water discharged from the faucet (5) and closes the circuit, and therefore, the timer (1) is cut off after a certain period of time has passed from the start of the timer operation. As long as the flow rate switch (Fsw) connected in parallel with the flow rate switch (Fsw) has a flow rate equal to or higher than a certain small amount of water, the closed circuit state is maintained as it is, and the pump CP+ continues to operate. During that time, even if the pressure in the discharge channel (2) becomes higher than the opening/closing boundary pressure of the pressure switch (Psw), that is, the set pressure that becomes the ON pressure and OFF pressure, the flow rate remains constant. The flow rate switch (
Fs, w) allows the pump (P) to continue operating without repeating opening/closing, that is, running and stopping.

そして、蛇口(5)を閉じると、吐出水路(2)の流量
が少な(なりかつ圧力が上昇する〆に伴なってアキュー
ムレータ(Ac c )への蓄圧が行なわれ、かつ吐出
水路(2)の流量か極小の一定水量以下になると同時に
流量スイッチ(Fsw)が働かなくなって閉路し、ポン
プfP)が運転を停止するもので、蛇口からの水の流出
が全(なければそのまま停止状態に保持される。ここで
流量スイッチ(Fsw)が働ない一定の小水量以下のご
く少量の水が連続して吐出使用されるかまたは漏水が続
くと、吐出水路(21の圧力が設定圧以下(圧力スイッ
チのON圧以下)に下がって圧力スイッチ(Psw)か
閉成し、この閉動作と同時にタイマー(1)が作動して
モータ電源の開閉部接点が閉路し、ポンプ(Plが運転
を始めるもので、このとき吐出水路(2)内の圧力が瞬
時に前記設定圧以上に上昇し、圧力スイッチ(Psw)
はすぐに開成することになるが、その後置くは前記タイ
マー(1)によってモータ電源の開閉部を閉路状態に保
持して運転を続けることになり、この間アキュームレー
タ(Acc)に対する蓄圧が行なわれる。従って圧力ス
イッチ(Psw)が成る設定圧を境にその上下で開閉す
るよう、つまりON圧とOFF圧とを同圧に設定したも
のであるlども拘らず、運転時間を長くでき、開閉部接
点が頻繁に開閉を繰返したリチャタリングを起すおそれ
がなく、運転、停止のインターバルを長くすることがで
きる。また前記タイマー(0の設定時間をアキュームレ
ータ(Acc)が締切圧まで上昇するのに十分な時間に
設定することにより、アキュームレータ(ACC)の蓄
圧利用容積を増し、運転、停止のインターバルを長くす
ることができる。
Then, when the faucet (5) is closed, as the flow rate of the discharge channel (2) decreases (and the pressure increases), pressure is accumulated in the accumulator (Ac c ), and the discharge channel (2) increases. As soon as the flow rate falls below a certain minimum water level, the flow rate switch (Fsw) stops working and closes, and the pump (fP) stops operating. If the flow rate switch (Fsw) does not work, if a very small amount of water below a certain small amount of water is continuously discharged or water leakage continues, the pressure in the discharge channel (21 will be lower than the set pressure (pressure switch The pressure switch (Psw) is closed, and at the same time as this closing operation, the timer (1) is activated, the opening/closing contact of the motor power supply is closed, and the pump (Pl starts operating). At this time, the pressure in the discharge waterway (2) instantly rises above the set pressure, and the pressure switch (Psw) is activated.
The motor will open immediately, but after that, the timer (1) will keep the opening/closing part of the motor power source in a closed state to continue operation, and during this time, pressure will be accumulated in the accumulator (Acc). Therefore, even though the pressure switch (Psw) opens and closes above and below the set pressure, that is, the ON pressure and OFF pressure are set to the same pressure, the operating time can be extended, and the switching part contact There is no risk of re-chattering caused by frequent repeated opening and closing, and the interval between operation and stop can be extended. In addition, by setting the timer (0) to a time sufficient for the accumulator (Acc) to rise to the cut-off pressure, the accumulated pressure utilization volume of the accumulator (ACC) can be increased and the interval between operation and stop can be lengthened. I can do it.

なおタイマー(1)が圧力スイッチ(Psw)の開動作
で作動する場合は、蛇口間あるいは漏水によって吐出水
路(2)の圧力が設定圧以下になると、圧力スイッチ(
Psw)が開成(ON) してポンプが運転を始め、そ
して吐出水路(2)の圧力が設定圧以上になって圧力ス
イッチ(Psw)が開路しても、流量が一定の小水量以
上あれば上記同様に流量スイッチ(Fsw)によってそ
のまま運転を継続し、また流量スイッチ(Fsw)が働
いていないときには前記圧力スイッチ(Psw)の開動
作と同時にタイマーσ]が作動して一定時間そのまま運
転を続けた後、ポンプが停止するもので、やはり運転時
間を長くてき、運転停止のインターバルを長くすること
ができる。
If the timer (1) is activated by the opening of the pressure switch (Psw), if the pressure in the discharge channel (2) falls below the set pressure due to faucet or water leakage, the pressure switch (Psw) will open.
Psw) is opened (ON) and the pump starts operating, and even if the pressure in the discharge channel (2) exceeds the set pressure and the pressure switch (Psw) is opened, if the flow rate exceeds a certain small water volume, the pump will start operating. In the same way as above, the operation is continued by the flow rate switch (Fsw), and when the flow rate switch (Fsw) is not working, the timer σ is activated at the same time as the pressure switch (Psw) is opened, and the operation is continued for a certain period of time. After that, the pump stops, which also lengthens the operation time and allows longer intervals between stops.

以上のように本発明は、成る設定圧以上では開、以下で
は閉となる、0N−OFF圧に差のない特殊な圧力スイ
ッチを用い、該圧力スイッチと流量スイッチおよび一定
時間モータ電源の開閉部を閉じるタイマーとの組合せに
より、ポンプの自動運転を行なえるようにしたものであ
り、ポンプ起動時は前記タイマーの働きでチャタリング
をなくして流量スイッチを確実に作動させることができ
るとともに、吐出水路の流量が一統運転でき、また流量
スイッチが働かない小水量使用時や漏水等の際にはタイ
マーにより設定された時間運転を続け、アキュームレー
タへの蓄圧も充分に行なえ、ポンプの運転、停止のイン
ターバルを長くすることかできるもので、0N−OFF
圧に差のない圧力スイッチを用いてのポンプ制御を何等
不都合なく行なえる。
As described above, the present invention uses a special pressure switch that is open above a set pressure and closed below a set pressure, with no difference between 0N and OFF pressures, and uses the pressure switch, a flow rate switch, and an opening/closing section for a motor power supply for a certain period of time. In combination with a timer that closes the pump, the pump can be operated automatically.When the pump is started, the timer eliminates chattering and ensures the operation of the flow rate switch. The flow rate can be controlled uniformly, and when the flow rate switch does not work when using a small amount of water or in the event of a water leak, the pump will continue to operate for the time set by the timer, and the accumulator will be able to accumulate sufficient pressure, allowing the pump to operate and stop at intervals. It can be made longer, 0N-OFF
Pump control using a pressure switch with no difference in pressure can be performed without any inconvenience.

しかも上記のようにON圧とOFF圧とが同圧の特殊な
圧力スイッチを用いて0N−OFF圧にヒステリシスを
持たない制御を行なえるから、締切圧を従来より低く設
定することが可能で、通常の圧力スイッチを使用する場
合に比べてポンプ能力か少なく済み、第1図の(ロ)(
コ)のことき特性を持つも)ので良いことになり、それ
だけ軸出力つまり動ノコの低減を図ることができる。こ
れは特に小流量、高揚程を要求される給湯用ポ利 ンプ等においてより有刺である。
Moreover, as mentioned above, the ON-OFF pressure can be controlled without hysteresis by using a special pressure switch in which the ON and OFF pressures are the same pressure, so it is possible to set the cut-off pressure lower than before. Compared to the case of using a normal pressure switch, the pump capacity is less than that shown in Figure 1 (B) (
This is a good thing because it has the characteristics of This is especially true in hot water supply pumps, etc., which require a small flow rate and high head.

【図面の簡単な説明】 第1図はポンプの揚程−流電特性線図、第2図は本発明
の1実施例を示す系統図、第3図は回路図、第4図へ\
ッ第6図はそれぞれ他の実施例を示す回路図である。 fPl・・・ポンプ、M・・・モータ、(21・・・吐
出水路、(3)・・・電源、(4)・・・開閉部、(5
)・・・蛇口、(Psw)・・・圧力スイッチ、(1)
・・・タイマー、(Fsw)・・・流量スイッチ。 特許出願人 株式会所芝浦製作所 第1図 第2図 第3図 第4図 第5図
[BRIEF DESCRIPTION OF THE DRAWINGS] Figure 1 is a pump head-current characteristic diagram, Figure 2 is a system diagram showing one embodiment of the present invention, Figure 3 is a circuit diagram, and Figure 4.
FIG. 6 is a circuit diagram showing other embodiments. fPl...Pump, M...Motor, (21...Discharge channel, (3)...Power supply, (4)...Opening/closing part, (5
)...Faucet, (Psw)...Pressure switch, (1)
...Timer, (Fsw)...Flow rate switch. Patent applicant Shibaura Seisakusho Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

【特許請求の範囲】[Claims] 1、 ポンプの吐出水路側に設けられるとともに成る設
定圧以上では開となりかつ以下では閉となる圧力スイッ
チと、前記圧力スイッチの閉動作または開動作により作
動して一定時間モータ電源の開閉部接点を閉じるタイマ
ーと、前記タイマーと並列に接続された流量スイッチと
を備え、前記タイマーが圧力スイッチの閉動作により作
動する場合はタイマーと流量スイッチの少なくとも一つ
が、またタイマーが圧力スイッチの開動作により作動す
る場合゛ は圧力スイッチとタイマーと流量スイッチの
少なくとも一つが接点を閉じている間運転を継続するよ
う構成してなることを特徴とするポンプの制御装置。
1. A pressure switch which is provided on the discharge waterway side of the pump and which opens when the pressure exceeds a set pressure and closes when the pressure falls below, and which is activated by the closing or opening operation of the pressure switch to close the opening/closing part contacts of the motor power supply for a certain period of time. a closing timer; and a flow rate switch connected in parallel with the timer, and when the timer is activated by the closing operation of the pressure switch, at least one of the timer and the flow rate switch is activated by the opening operation of the pressure switch. In this case, the pump control device is configured to continue operation while at least one of a pressure switch, a timer, and a flow rate switch closes a contact point.
JP4835684A 1984-03-13 1984-03-13 Control unit for pump Pending JPS60192896A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4835684A JPS60192896A (en) 1984-03-13 1984-03-13 Control unit for pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4835684A JPS60192896A (en) 1984-03-13 1984-03-13 Control unit for pump

Publications (1)

Publication Number Publication Date
JPS60192896A true JPS60192896A (en) 1985-10-01

Family

ID=12801074

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4835684A Pending JPS60192896A (en) 1984-03-13 1984-03-13 Control unit for pump

Country Status (1)

Country Link
JP (1) JPS60192896A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62129597A (en) * 1985-11-29 1987-06-11 Ebara Corp Operation device for feed water pump
JP2021183817A (en) * 2020-05-21 2021-12-02 株式会社川本製作所 Pump system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5451006A (en) * 1977-09-30 1979-04-21 Hitachi Ltd Automatic well-pump
JPS5762983A (en) * 1980-09-30 1982-04-16 Fuji Electric Co Ltd Parallel running system of pump
JPS5781181A (en) * 1980-11-07 1982-05-21 Hitachi Ltd Pressure tank type water supply system
JPS57148081A (en) * 1981-03-09 1982-09-13 Sanyo Electric Co Ltd Automatic operating device for pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5451006A (en) * 1977-09-30 1979-04-21 Hitachi Ltd Automatic well-pump
JPS5762983A (en) * 1980-09-30 1982-04-16 Fuji Electric Co Ltd Parallel running system of pump
JPS5781181A (en) * 1980-11-07 1982-05-21 Hitachi Ltd Pressure tank type water supply system
JPS57148081A (en) * 1981-03-09 1982-09-13 Sanyo Electric Co Ltd Automatic operating device for pump

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62129597A (en) * 1985-11-29 1987-06-11 Ebara Corp Operation device for feed water pump
JPH0563639B2 (en) * 1985-11-29 1993-09-10 Ebara Mfg
JP2021183817A (en) * 2020-05-21 2021-12-02 株式会社川本製作所 Pump system

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