JPS62240497A - Pump device - Google Patents

Pump device

Info

Publication number
JPS62240497A
JPS62240497A JP8470786A JP8470786A JPS62240497A JP S62240497 A JPS62240497 A JP S62240497A JP 8470786 A JP8470786 A JP 8470786A JP 8470786 A JP8470786 A JP 8470786A JP S62240497 A JPS62240497 A JP S62240497A
Authority
JP
Japan
Prior art keywords
time
water leakage
water
pump motor
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.)
Granted
Application number
JP8470786A
Other languages
Japanese (ja)
Other versions
JPH0694878B2 (en
Inventor
Shuichi Fujinaka
藤中 秀一
Hisato Shirakawa
白川 久登
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP61084707A priority Critical patent/JPH0694878B2/en
Publication of JPS62240497A publication Critical patent/JPS62240497A/en
Publication of JPH0694878B2 publication Critical patent/JPH0694878B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PURPOSE:To prevent the loss of water to be used, by providing means for determining a water leakage condition according to outputs from a pressure sensor and a flow sensor, and determining the water leakage when the flow rate is less than a predetermined value, and an off-time of a motor is substantially constant, and the intermittence of the off-time is repeated for a period of time more than a predetermined value. CONSTITUTION:A control means 10 operates to switch on and off a motor 2 according to outputs from a flow sensor 7 and a pressure sensor 6, and a determining means 11 determines a water leakage condition. The water leakage condition determining means 11 determines the water leakage condition when an off-time of the motor 2 is substantially constant, and the intermittence of the off-time is repeated for a period of time more than a predetermined value. Accordingly, the water leakage can be immediately acquainted by a user, and the loss of water to be used can be prevented.

Description

【発明の詳細な説明】 (イ) 産業上の利用分野 本発明は漏水状態を判別して報知するポンプ装置に関す
る。
DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a pump device that determines and notifies the state of water leakage.

(ロ) 従来の技術 本発明に先行する特開昭60−237197号公報に記
載された従来の技術では、ポンプモータの過負荷等を判
別する判別手段を設けているが、この判別手段はポンプ
モータの状態を判別するのみで漏水等の水路系の故障を
具体的に判別できなかった。
(b) Prior art The conventional technology described in Japanese Patent Application Laid-Open No. 60-237197, which precedes the present invention, is provided with a determining means for determining whether the pump motor is overloaded or the like. It was not possible to specifically determine failures in the waterway system, such as water leaks, by only determining the state of the motor.

〈ハ)発明が解決しようとする問題点 本発明は前述の点に鑑み、水路系の故障を具体的に報知
することにより、修理作業を簡単にするものである。
(c) Problems to be Solved by the Invention In view of the above-mentioned points, the present invention simplifies repair work by specifically notifying failures in the waterway system.

(ニ)問題点を解決するための手段 本発明は、ポンプ本体部の吐出側に流量センサと圧力セ
ンサを設け、両センサの出力に基いて漏水状態を判別す
る判別手段と該判別手段の出力に基いて漏水状態を報知
する報知手段とを備え、前記判別手段は、流量が所定値
以下で且つ前記ポンプモータのオフ時間が略一定でこの
略一定状態のオフ時間の断続運転が所定時間以上くり返
された場合に漏水状態と判別すべく構成してなるもので
ある。
(d) Means for solving the problem The present invention provides a flow rate sensor and a pressure sensor on the discharge side of the pump body, and a determining means for determining the state of water leakage based on the outputs of both sensors, and the output of the determining means. and a notification means for notifying a water leakage state based on the flow rate, and the determination means is configured such that when the flow rate is below a predetermined value and the off time of the pump motor is substantially constant, and the intermittent operation during the off time in this substantially constant state is longer than a predetermined time. The system is configured to determine that there is a water leak if this occurs repeatedly.

(ホ)作用 本発明によれば、水漏れが生じた場合には、その漏水量
は使用者により任意に使用される水量とは異なり略一定
であるため、ポンプモータのオフ時間も略−・定となり
、この略一定状態のオフ時間の断続運転が所定時間以上
くり返された場合には漏水状態と判別して報知される。
(E) Function According to the present invention, when water leaks, the amount of water leaked is approximately constant, unlike the amount of water used arbitrarily by the user, and therefore the off time of the pump motor is also approximately -. If this substantially constant off-time intermittent operation is repeated for a predetermined period of time or more, it is determined that there is a water leak and a notification is issued.

(へ)実施例 次に本発明の一実施例について説明する。(f) Example Next, one embodiment of the present invention will be described.

第1図において、(1)はポンプ本体部で、ポンプモー
タ(2)(後記する)により駆動されるウェスコ型のイ
ンペラをケーシング部に収納してなる。
In FIG. 1, (1) is a pump main body, which has a Wesco-type impeller driven by a pump motor (2) (described later) housed in a casing.

(3)はポンプ本体部(1)に接続した吸込側配管で、
逆止弁(4)を介設している。(5)はポンプ本体部(
1)に接続した吐出側配管、(6)は吐出側配管(5)
に連通した圧力センサ、(7)は流量センサ、(8)は
吐出側配管(5)に接続した小容量の圧力タンク、(9
)は吐出側配管(5)の先端部に設けた吐出水栓である
(3) is the suction side pipe connected to the pump body (1),
A check valve (4) is provided. (5) is the pump body (
1) is the discharge side pipe connected to (6) is the discharge side pipe (5)
(7) is a flow rate sensor, (8) is a small-capacity pressure tank connected to the discharge side piping (5), (9) is a pressure sensor connected to the
) is a discharge faucet provided at the tip of the discharge side pipe (5).

第2図において、(10)は制御手段で、前記流量セン
サ(7)及び前記圧力センサ(6)の出力に基いて前記
ポンプモータ(2)をオン、オフ制御する。
In FIG. 2, (10) is a control means that controls on/off the pump motor (2) based on the outputs of the flow rate sensor (7) and the pressure sensor (6).

(11)は漏水状態を判別する判別手段で、前記両セン
サ(6)(7)の出力に基いて判別する。(12)は漏
水状態等の報知手段で、前記判別手段(11)の出力に
基いて報知する。
(11) is a determining means for determining the state of water leakage, which performs the determination based on the outputs of both the sensors (6) and (7). (12) is a means for notifying water leakage status, etc., which notifies based on the output of the determining means (11).

第3図におい工、(13)は前記制御手段(10)をそ
の内部にプログラム構成したマイフンで、端子(A2>
(A3)のそれぞれに前記圧力センサ(6)及び前記d
l量センサ(7)のスイッチ部(6a)(7a)を接続
している。 (14)は前記制御手段(10)の制御回
路部(15)を構成するフォトダイオードで、マイコン
(13)の駆動用出力ポート(GO)に接続している。
In Fig. 3, the odor switch (13) is a microphone in which the control means (10) is programmed, and the terminal (A2>
(A3), the pressure sensor (6) and the d
The switch parts (6a) and (7a) of the l quantity sensor (7) are connected. (14) is a photodiode constituting the control circuit section (15) of the control means (10), and is connected to the drive output port (GO) of the microcomputer (13).

(16)は前記制御回路部(15)のフォトダイオード
(14)にカップリングしたフォトトライアックで、ス
イッチング回路部(17)のトライアック(18)のゲ
ート回路を構成している。 (19)は直流電源回路部
で、降圧用トランス(20)、整流子(21)及びRC
平滑回M(22)を有して、5ボルトと7ボルトの電圧
を各所に給電している。(23)は割り込み信号回路部
で、端子(I NT)に割り込み信号を入力して所望時
にマイコン〈13)の実行状態を中断させる。
(16) is a phototriac coupled to the photodiode (14) of the control circuit section (15), and constitutes a gate circuit of the triac (18) of the switching circuit section (17). (19) is the DC power supply circuit section, which includes a step-down transformer (20), a commutator (21) and an RC
It has a smoothing circuit M (22) to supply voltages of 5 volts and 7 volts to various parts. (23) is an interrupt signal circuit section which inputs an interrupt signal to a terminal (INT) to interrupt the execution state of the microcomputer (13) at a desired time.

(24)はリセット回路部で、種々の故障によりポンプ
モータ(2)が停止きれた場合に、そのリセットボタン
(25)を手動操作することにより前記ポンプモータ(
2)を起動可能にするものである。 (26a)(26
b)(26c)(26d)は前記報知手段(12)の主
要部を構成するフォトダイオードで、ボート(EO)(
El)(E 2)(E s)を介してマイコン(13)
の内部の点灯回路部(27)に接続している。報知手段
(12)では、前記判別手段(11)の出力に基いて前
記点灯回路部(27)が各7tトダイオード(26a)
(26b)(26c)(26d)を選択的に点灯し点灯
状態の組合せによって種々のポンプ状態を視覚的に報知
する0例えば漏水の場合は、各フAトダイ才−ド(26
a)(26b)(26c)(26d)をそれぞれオフ、
オフ、オフ、オンと組合せ表示する。
(24) is a reset circuit section, in which when the pump motor (2) is stopped due to various failures, the pump motor (2) can be reset by manually operating its reset button (25).
2) can be activated. (26a) (26
b) (26c) (26d) are photodiodes constituting the main part of the notification means (12);
Microcomputer (13) via El) (E 2) (E s)
It is connected to the internal lighting circuit section (27). In the notification means (12), based on the output of the discrimination means (11), the lighting circuit section (27) connects each 7t diode (26a).
(26b), (26c), and (26d) are selectively turned on to visually notify various pump conditions depending on the combination of lighting conditions.For example, in the case of water leakage, each
a) Turn off (26b), (26c), and (26d), respectively.
Display in combination with OFF, OFF, and ON.

次に前記制御手段(10)の構成について説明する。Next, the configuration of the control means (10) will be explained.

第4図及び第6図において、(28)は前記制御回路部
(15)等の出力に基いて動作する前記ポンプモータ(
2)の駆動回路部である。前記制御回路部(15)は前
記圧力センサ(6)と前記流量センサ(7)の出力に基
いてポンプモータ(2)をオン、オフ制御する。前記制
御回路部(15)では、92以上の水量においてはポン
プモータ(2)を第6図(a)に示すように連続運転、
Q3〜Q2の水量の範囲においては第6図(b)に示す
ように流量センサ(7)に基いてポンプモータ(2)を
制御すべくプログラム構成されている。 (29)は前
記流量センサ(7)と前記圧力センサ(6)に接続した
タイマー回路部である。タイマー回路部(29)は流量
センサ(7)のオフ信号(Sl)に基いて作動して第6
図(C)に示すように所定のタイマ一時間(Ta)だけ
オン状態を継続する。前記流量センサ(7)は流量が2
!/分より少なくなったときにオフするように設定され
ている。 (30)は前記タイマー回路部(29)によ
るタイマー運転時において使用水量を検出する検出回路
部で、具体的には所定時間(Ts)内のポンプモータ(
2)の起動回数を検出する。前記水栓(9)の開度が小
さく使用水量が少ないときにはポンプモータ(2)のオ
フ時間(Tof)が長くなり前記起動回数が少なくなり
、従ってこの少ない起動回数を検出することにより間接
的に少ない流量を検出できる。逆に水栓(9)の開度が
大きく使用水量が多いときにはポンプモータ(2)のオ
フ時間(Tof)が短くなり前記起動回数が多くなり、
従ってこの多い起動回数を検出することにより間接的に
多い流量を検出できる。前記検出回路部(30)に関し
ては前記起動回数に代えて前記オフ時間(Tof)を検
出することにより間接的に流量を検出するものも実施き
れる。 <31)は前記検出回路部(30)で検出した
起動回数又はオフ時間(Tof)に基いてこれらを基準
値と比較して前記ポンプモータ(2)の運転方式を前記
タイマー回路部(29)によるタイマー運転と前記圧力
センサ(6)による圧力センサ運転との間で選択する選
択回路部で、具体的には、前記起動回数が多く前記オフ
時間(Tof)が短かいとき即ち使用水量の多いときに
は前記タイマー運転を選択し、逆に前記起動回数が小さ
くオフ時間(Tof)が長いとき即ら使用水量の少ない
ときには圧力センサ運転を選択する。前記タイマー運転
と前記圧力センサ運転の選択基準値は具体的には10秒
であり、この10秒基準値より前記オフ時間(Tof)
が長いときには前記タイマー運転が継続され短いときに
は第6図(d)に示すように圧力センサ運転に切換えら
れる。前記タイマー運転によるオン時間(Ta)は具体
的には15秒に設定されている。この選択回路部(31
)では、その選択結果に基いて前記駆動回路部(28)
を介して前記ポンプモータ(2)を駆動する。
In FIGS. 4 and 6, (28) is the pump motor (28) that operates based on the output of the control circuit (15), etc.
2) is the drive circuit section. The control circuit section (15) controls the pump motor (2) to turn on and off based on the outputs of the pressure sensor (6) and the flow rate sensor (7). The control circuit section (15) operates the pump motor (2) continuously as shown in FIG. 6(a) when the water amount is 92 or more.
As shown in FIG. 6(b), the program is configured to control the pump motor (2) based on the flow rate sensor (7) in the water amount range from Q3 to Q2. (29) is a timer circuit connected to the flow rate sensor (7) and the pressure sensor (6). The timer circuit section (29) operates based on the off signal (Sl) of the flow rate sensor (7), and the sixth
As shown in Figure (C), the ON state continues for a predetermined timer one hour (Ta). The flow rate sensor (7) has a flow rate of 2
! It is set to turn off when the number of minutes is less than /minute. (30) is a detection circuit unit that detects the amount of water used during timer operation by the timer circuit unit (29), specifically the pump motor (
2) Detect the number of activations. When the degree of opening of the water faucet (9) is small and the amount of water used is small, the off time (Tof) of the pump motor (2) becomes long and the number of activations decreases. Therefore, by detecting this small number of activations, Can detect small flow rates. Conversely, when the opening degree of the water faucet (9) is large and the amount of water used is large, the off time (Tof) of the pump motor (2) becomes short and the number of times of activation becomes large.
Therefore, by detecting this large number of activations, a large flow rate can be indirectly detected. Regarding the detection circuit section (30), it is also possible to implement one in which the flow rate is indirectly detected by detecting the off time (Tof) instead of the number of activations. <31) is based on the number of activations or off time (Tof) detected by the detection circuit section (30), and compares these with a reference value to determine the operation method of the pump motor (2) in the timer circuit section (29). A selection circuit section that selects between timer operation by the pressure sensor (6) and pressure sensor operation by the pressure sensor (6), specifically when the number of activations is large and the off time (Tof) is short, that is, when the amount of water used is large Sometimes, the timer operation is selected, and conversely, when the number of activations is small and the off time (Tof) is long, that is, when the amount of water used is small, the pressure sensor operation is selected. Specifically, the selection reference value for the timer operation and the pressure sensor operation is 10 seconds, and the off time (Tof) is determined from this 10 second reference value.
When the timer operation is long, the timer operation is continued, and when it is short, it is switched to the pressure sensor operation as shown in FIG. 6(d). Specifically, the on time (Ta) due to the timer operation is set to 15 seconds. This selection circuit section (31
), the drive circuit section (28) is selected based on the selection result.
The pump motor (2) is driven through the pump motor (2).

而して前記漏水状態判別手段(11)は、第6図(d)
に示す圧力センサ運転時(流量が前記選択回路部(31
)で判定され所定値以下の運転時)において前記ポンプ
モータ(2)のオフ時間(Tof)が略一定(具体的に
は±10秒の誤差内)でこの略一定状態のオフ時間(T
+ ±10秒)(T1は一定時間)が(10秒≦T1±
10秒≦120秒)の時間範囲内にあって、且つこのオ
フ時間(T+±10秒)の断続運転が所定時間(Tb)
(具体的には1時間に設定されている)以上くり返され
た場合に、漏水状態と判別すべくプログラム構成しであ
る。
The water leakage state determining means (11) is as shown in FIG. 6(d).
When the pressure sensor is operating as shown in (the flow rate is the selection circuit section (31
), the off time (Tof) of the pump motor (2) is approximately constant (within an error of ±10 seconds), and the off time (Tof) in this approximately constant state is
+ ±10 seconds) (T1 is a certain time) is (10 seconds≦T1±
10 seconds≦120 seconds), and the intermittent operation of this off time (T+±10 seconds) is for a predetermined time (Tb)
The program is configured to determine that there is a water leak if this is repeated for more than one hour (specifically set to one hour).

前記ポンプ装置では、第5図に示すように、使用水量が
Q2より多い場合には、ポンプモータ(2)は連続運転
される。
In the pump device, as shown in FIG. 5, when the amount of water used is greater than Q2, the pump motor (2) is continuously operated.

使用水量がQ2より減少した場合には、圧力センサ(6
)のオフ信号に基いて流量センサ(7)運転が開始され
、ポンプモータ(2)は圧力センサ(6)でオン、流量
センサ(7)でオフされるようになる。
If the amount of water used decreases from Q2, the pressure sensor (6
) The operation of the flow rate sensor (7) is started based on the off signal of the pump motor (2), and the pump motor (2) is turned on by the pressure sensor (6) and turned off by the flow rate sensor (7).

使用水量が03より減少した場合には、流量センサ(7
)のオフ信号〈Sl)に基いてタイマー回路部(29)
カ作動して、タイマー運転が開始きれ、ポンプモータ(
2)は圧力センサ(6)でオンされるもののそのオン時
間(Ta)はタイマー回路部(29)により所定の長時
間に規制きれ、従ってポンプモータ(2)は頻繁にオン
オフすることはない。
If the amount of water used decreases from 03, the flow rate sensor (7
) based on the off signal <Sl) of the timer circuit section (29).
The pump motor (
2) is turned on by the pressure sensor (6), but its on time (Ta) can be regulated to a predetermined long time by the timer circuit (29), so the pump motor (2) is not turned on and off frequently.

更に使用水量がQ4より減少した場合には、ポンプモー
タ(2)のオフ時間(Tof)は長く、起動回数は多く
なり、このオフ時間又は起動回数に基いて前記選択回路
部(31)において圧力センサ運転が選択され、タイマ
ー回路部(29)からの信号は停止し、よってポンプモ
ータ(2)はそのオン時間が圧力センサ(6)によって
間欠的に短く規制される。
Furthermore, when the amount of water used decreases from Q4, the off time (Tof) of the pump motor (2) becomes longer and the number of starts increases, and the pressure is adjusted in the selection circuit section (31) based on this off time or the number of starts. Sensor operation is selected, the signal from the timer circuit (29) is stopped, and the on-time of the pump motor (2) is intermittently regulated to be short by the pressure sensor (6).

従ってポンプモータ(2)はタイマー運転の場合に比較
して短い時間で停止して通電時間率(Ton/(Ton
+ Tof))を小さくして消費電力を節約する。
Therefore, the pump motor (2) stops in a shorter time than in the case of timer operation, and the energization time rate (Ton/(Ton)
+ Tof)) to save power consumption.

前記圧力センナ運転時において水栓〈9)等から漏水が
ある場合には前記判別手段(11)により漏水状態が判
別きれ報知手段(12)により報知される。
If there is water leakage from the water faucet <9) or the like during the operation of the pressure sensor, the water leakage state has been determined by the determination means (11) and is notified by the notification means (12).

(ト)発明の効果 本発明は以上のように構成したから、水栓等から漏水し
た場合にはその状態を使用者に報知でき、従って使用水
の損失を防止できる。また、漏水状態の判別手段及び報
知手段は各種センサの出力に基いて作動すべく電気回路
的に構成されるため、故障の少いポンプ装置を簡単且つ
低コストに構成できる。
(G) Effects of the Invention Since the present invention is configured as described above, when water leaks from a faucet or the like, the user can be informed of the situation, and therefore, loss of used water can be prevented. In addition, since the water leakage state determination means and notification means are configured as electric circuits to operate based on the outputs of various sensors, a pump device with few failures can be constructed simply and at low cost.

【図面の簡単な説明】[Brief explanation of drawings]

第1図乃至第6rXJ(a)(b)(c)(d)は本発
明の一実施例を示し、第1図は水路図、第28iOは全
体の構成図、第3図は電気回路図、第4図は制御手段の
構成図、第5図は揚水特性図、第6図(a)(b)(c
)(d)は使用水量に対応して変化するポンプの各動作
の説明図である。 (1)・・・ポンプ本体部、(2)・・・ポンプモータ
、(6)・・・圧力センサ、(7)・・・流量センサ、
(11)・・・判別手段、り12)・・・報知手段、(
Tof)・・・オフ時間、(Tb)・・・所定時間。
1 to 6rXJ(a)(b)(c)(d) show one embodiment of the present invention, FIG. 1 is a hydrographic diagram, No. 28iO is an overall configuration diagram, and FIG. 3 is an electric circuit diagram. , Fig. 4 is a configuration diagram of the control means, Fig. 5 is a pumping characteristic diagram, and Fig. 6 (a), (b), and (c).
) and (d) are explanatory diagrams of each operation of the pump that changes depending on the amount of water used. (1)...Pump body, (2)...Pump motor, (6)...Pressure sensor, (7)...Flow rate sensor,
(11)...discrimination means, ri12)...notification means, (
Tof)...off time, (Tb)...predetermined time.

Claims (1)

【特許請求の範囲】 1)ポンプ本体部の吐出側に流量センサと圧力センサを
設け、前記両センサの出力に基いてポンプモータをオン
、オフ制御してなるものにおいて、 前記両センサの出力に基いて漏水状態を判別する判別手
段と該判別手段の出力に基いて漏水状態を報知する報知
手段とを備え、 前記判別手段は、流量が所定値以下で且つ前記ポンプモ
ータのオフ時間が略一定でこのオフ時間の断続運転が所
定時間以上くり返された場合に漏水状態と判別すべく構
成してなることを特徴とするポンプ装置。
[Scope of Claims] 1) A flow rate sensor and a pressure sensor are provided on the discharge side of the pump body, and the pump motor is controlled on and off based on the outputs of both the sensors, wherein the output of both the sensors is and a notification means that notifies the state of water leakage based on the output of the determining means, and the determining means is configured such that the flow rate is equal to or less than a predetermined value and the off time of the pump motor is substantially constant. A pump device characterized in that it is configured to determine that a water leakage state occurs when this intermittent operation during the off time is repeated for a predetermined period of time or more.
JP61084707A 1986-04-11 1986-04-11 Pump device Expired - Fee Related JPH0694878B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61084707A JPH0694878B2 (en) 1986-04-11 1986-04-11 Pump device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61084707A JPH0694878B2 (en) 1986-04-11 1986-04-11 Pump device

Publications (2)

Publication Number Publication Date
JPS62240497A true JPS62240497A (en) 1987-10-21
JPH0694878B2 JPH0694878B2 (en) 1994-11-24

Family

ID=13838133

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61084707A Expired - Fee Related JPH0694878B2 (en) 1986-04-11 1986-04-11 Pump device

Country Status (1)

Country Link
JP (1) JPH0694878B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995002126A1 (en) * 1993-07-08 1995-01-19 Fisherman Holdings Limited T/A M2Technology Pump controller
CN106837755A (en) * 2017-01-17 2017-06-13 无锡市天利流体科技有限公司 Micro pump
JP2021183817A (en) * 2020-05-21 2021-12-02 株式会社川本製作所 Pump system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS614996A (en) * 1984-06-20 1986-01-10 日揮株式会社 Leakage detection system by sump pump

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS614996A (en) * 1984-06-20 1986-01-10 日揮株式会社 Leakage detection system by sump pump

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995002126A1 (en) * 1993-07-08 1995-01-19 Fisherman Holdings Limited T/A M2Technology Pump controller
CN106837755A (en) * 2017-01-17 2017-06-13 无锡市天利流体科技有限公司 Micro pump
JP2021183817A (en) * 2020-05-21 2021-12-02 株式会社川本製作所 Pump system

Also Published As

Publication number Publication date
JPH0694878B2 (en) 1994-11-24

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