JP3246138U - Electric pump automatic stop device - Google Patents
Electric pump automatic stop device Download PDFInfo
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- JP3246138U JP3246138U JP2023002683U JP2023002683U JP3246138U JP 3246138 U JP3246138 U JP 3246138U JP 2023002683 U JP2023002683 U JP 2023002683U JP 2023002683 U JP2023002683 U JP 2023002683U JP 3246138 U JP3246138 U JP 3246138U
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- electric pump
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- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000005086 pumping Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 230000007423 decrease Effects 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000005406 washing Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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Abstract
【課題】電動ポンプ運転中に汲み上げられる液体がなくなった場合、ポンプを停止させる装置を提供する。【解決手段】電動ポンプを停止させる装置は、モーター駆動電流により回路に挿入した抵抗３に発生する電圧を比較器５で基準電圧と比較する。電動ポンプで汲み上げられる液体がなくなった場合、ポンプの負荷が軽くなって、ポンプの電流が減少するので、抵抗に発生する電圧が基準電圧を下回った場合に電動ポンプを自動停止する。【選択図】図１[Problem] To provide a device that stops an electric pump when there is no more liquid to be pumped while it is in operation. [Solution] The device that stops an electric pump uses a comparator 5 to compare the voltage generated across a resistor 3 inserted in the circuit by the motor drive current with a reference voltage. When there is no more liquid to be pumped by the electric pump, the load on the pump becomes lighter and the pump current decreases, so the electric pump is automatically stopped when the voltage generated across the resistor falls below the reference voltage. [Selected Figure] Figure 1
Description
本考案は、電動ポンプで吸い上げる液体がなくなった場合，ポンプに流れる電流が減少することを利用し，電流の減少をもってポンプ電源を遮断するものです。 This invention utilizes the fact that when the electric pump runs out of liquid to suck up, the current flowing through the pump decreases, and the pump power is cut off when the current decreases.
液体を移送するための電動ポンプ，例えば風呂の残り湯を洗濯機に移すとか，ポリタンクの水をシャワーとして使うとかの用途において，水中ポンプは便利な道具ですが，汲み上げる水が無くなってもポンプは停止せず，空回転を継続し，モーターの寿命を縮めることになる。Submersible pumps are useful tools for transferring liquids, such as transferring leftover hot water from a bath to a washing machine or using water from a plastic tank for a shower, but even if the water to be pumped runs out, the pump will continue to operate. It will not stop and will continue to idle, shortening the life of the motor.
例えば，風呂水の残り湯を吸い上げて洗濯に使う機能を有した電気洗濯機では，残り湯が空になってもすぐにポンプは停止せず，しばらくの間，空回転が続く。
残り湯がなくなってもポンプが停止しないので，洗濯機は次のシーケンスに進むことができないし，空回転でモーターの寿命を縮めることになる。また，一般的な小型水中ポンプでは，物理的な手段で水位を測定検知する例もあるが，これだと，フロートスイッチなどの設備が必要であることから，本考案のように電流を測定して水枯渇を判断できれば，物理的なフロートスイッチ等を省略することができる。 For example, in an electric washing machine that has the ability to suck up leftover hot water from a bathtub and use it for washing, the pump does not stop immediately even when the remaining hot water is emptied, and continues to run idly for a while.
Since the pump does not stop even when the remaining hot water runs out, the washing machine cannot proceed to the next sequence, and idling will shorten the life of the motor. In addition, in some general small submersible pumps, the water level is measured and detected by physical means, but this requires equipment such as a float switch, so it is better to measure the current as in the present invention. If water depletion can be determined based on the water pressure, physical float switches, etc. can be omitted.
電動ポンプは，汲み上げる液体が無くなっても停止せず，空回転を続けるが，そのことに気がついた人が電動ポンプの電源をＯＦＦしなければならない。The electric pump does not stop even when it runs out of liquid to pump, and continues to idle, but the person who notices this has to turn off the power to the electric pump.
本考案は，空回転時にポンプに流れる電流が減少することを捉え，液体が無くなったことを推定し，その時に電流を遮断して電動ポンプの運転を停止します。This invention detects the decrease in the current flowing through the pump during idle rotation, infers that there is no more liquid, and cuts off the current to stop the electric pump from operating.
本考案の電気回路は，ポンプの電流を把握するための抵抗，抵抗に発生する電圧を増幅するためのオペアンプ，電流の減少を判断する比較器，電流を開閉するリレースイッチ及びリレーを保持するためのトランジスタで構成されます。 The electrical circuit of the present invention consists of a resistor for determining the current of the pump, an operational amplifier for amplifying the voltage generated in the resistor, a comparator for determining the decrease in current, a relay switch for opening and closing the current, and a relay for holding the relay. It consists of transistors.
電動ポンプの電源ライン途中に，電流を測定するための抵抗を挿入し，抵抗に発生する電圧から電流を測定するが，その抵抗は影響を及ぼさないように０．１Ω以下にする。抵抗の発生電圧をオペアンプで増幅し，オペアンプの出力電圧を，あらかじめ設定した基準電圧と比較するための比較器とスイッチに使うリレーがあります。 A resistor is inserted in the power supply line of the electric pump to measure the current, and the current is measured from the voltage generated across the resistor, but the resistance should be 0.1Ω or less so as not to have any effect. There is a comparator that amplifies the voltage generated by the resistor using an operational amplifier, and compares the output voltage of the operational amplifier with a preset reference voltage, and a relay that is used as a switch.
汲み上げる液体がなくなってポンプが自動的に停止すれば，ポンプの動きや水位残量を気にするすることなく，見守る必要もなく，液体がなくなった場合の次のシーケンスへ進むことができる。If the pump automatically stops when the liquid to be pumped runs out, you can proceed to the next sequence in case the liquid runs out, without having to worry about the pump's movement or remaining water level, and without having to keep an eye on it.
本考案の装置は，小型水中ポンプや風呂水吸込み機能付きの洗濯機などの直流モーター回路途中に挿入して使います。The device of this invention is used by inserting it into the DC motor circuit of a small submersible pump or a washing machine with a bath water suction function.
汲み上げる液体が無くなると，モーター負荷が軽くなり電流が減ることから，抵抗に発生する電圧も下がり，オペアンプ出力電圧が基準電圧を下回ることになり，比較器の出力がＯＦＦになることと連動し，リレーを保持していたトランジスタがＯＦＦとなりリレーもＯＦＦとなりモーターが停止する。一度停止すると運転スイッチでリレーをＯＮすればモーターは再び動くが液体がなければ直ちに停止する。When the liquid to be pumped runs out, the motor load becomes lighter and the current decreases, so the voltage generated across the resistor also decreases, the operational amplifier output voltage drops below the reference voltage, and the output of the comparator turns OFF. The transistor holding the relay turns off, the relay also turns off, and the motor stops. Once it has stopped, turning on the relay with the operation switch will start the motor again, but if there is no liquid, it will stop immediately.
以下、添付図面に従って実施例を説明します。
１は，電動ポンプの電源で，
２は，電動ポンプのモーターです。
３は，電流を検出するための抵抗で，電流が流れることで，この抵抗端に発生する電圧により，ポンプの負荷状態を推定します。
４は，抵抗に発生した電圧を増幅し，基準電圧との比較を容易にします。
５は，基準電圧と抵抗に発生した電圧を比較する比較器（コンパレーター）で，抵抗に発生した電圧を増幅したオペアンプ出力電圧が基準電圧より下回った場合に，出力をほぼゼロボルトのＬｏｗにします。モーターが負荷運転している場合は，基準電圧を上回ることから，電源電圧に近いＨｉｇｈを継続します。
６は，基準電圧を決めるための分圧抵抗です。精密な動作を必要としないので，電源電圧を分圧して作成する程度で十分である。
７は，停止スイッチである。電動ポンプが自動停止する前に，手動で停止させる場合に使うことができる。
８は，リレーを駆動するトランジスターで，５の電圧比較器出力がＨｉｇｈの時にリレーをＯＮし，５の比較器出力がＬｏｗでリレーをＯＦＦします。
９は，電動ポンプの電流をＯＮ・ＯＦＦするためのリレーです。
１０は，電動ポンプの運転スイッチです。電動ポンプを運転する時に使いますが，液体が空になってモーターが自動停止したあとに再度モーターを動かしたい場合に運転スイッチでリレーをＯＮするが，液体がなければ自動的に停止します。
なお，このスイッチに間欠タイマー接点を接続すれば，少しづつ水が溜まるタンクで間欠汲み上げ用途に使うことができる。 Examples are explained below according to the attached drawings.
1 is the power supply for the electric pump,
2 is the electric pump motor.
3 is a resistor for detecting current, and when current flows, the pump load status is estimated based on the voltage generated at this resistor end.
4 amplifies the voltage generated across the resistor to facilitate comparison with the reference voltage.
5 is a comparator that compares the reference voltage and the voltage generated at the resistor. If the operational amplifier output voltage that amplifies the voltage generated at the resistor is lower than the reference voltage, the output is set to low, almost zero volts. . When the motor is operating under load, the voltage exceeds the reference voltage, so it continues to be High, close to the power supply voltage.
6 is a voltage dividing resistor for determining the reference voltage. Since precise operation is not required, it is sufficient to create it by dividing the power supply voltage.
7 is a stop switch. It can be used to manually stop the electric pump before it stops automatically.
8 is a transistor that drives the relay. When the voltage comparator output of 5 is High, the relay is turned on, and when the comparator output of 5 is Low, the relay is turned off.
9 is a relay to turn on/off the electric pump current.
10 is the operation switch for the electric pump. It is used when operating an electric pump, and if you want to start the motor again after the liquid is empty and the motor stops automatically, turn on the relay with the operation switch, but if there is no liquid, it will stop automatically.
By connecting an intermittent timer contact to this switch, it can be used for intermittent pumping in a tank where water accumulates little by little.
１ 電動ポンプの電源です。
２ 電動ポンプのモーターです。
３ 低抵抗です。電源とモーターの間に挿入し，電流を測定します。
４ 抵抗に発生する電圧を比較可能な電圧に増幅するためのオペアンプです。
５ オペアンプ出力電圧と基準電圧を比較する比較器（コンパレーター）です。
６ 基準電圧を設定するための分圧抵抗です。
７ 電動ポンプ運転途中に，ポンプを停止するためのスイッチです。
８ 電動ポンプ動作中にリレーＯＮを維持するトランジスターです。
９ モーターの電流のＯＮ・ＯＦＦするためのリレーです。
１０ 電動ポンプの運転スイッチです。 1 Power source for electric pump.
2 This is the electric pump motor.
3. Low resistance. Insert it between the power supply and motor and measure the current.
4 This is an operational amplifier that amplifies the voltage generated in the resistor to a comparable voltage.
5 Comparator that compares the operational amplifier output voltage and the reference voltage.
6 Voltage dividing resistor for setting the reference voltage.
7 Switch to stop the electric pump during operation.
8 This is a transistor that keeps the relay ON while the electric pump is operating.
9 Relay to turn on/off the motor current.
10 This is the operation switch for the electric pump.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2023002683U JP3246138U (en) | 2023-07-07 | 2023-07-07 | Electric pump automatic stop device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2023002683U JP3246138U (en) | 2023-07-07 | 2023-07-07 | Electric pump automatic stop device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP3246138U true JP3246138U (en) | 2024-03-26 |
Family
ID=90366938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2023002683U Active JP3246138U (en) | 2023-07-07 | 2023-07-07 | Electric pump automatic stop device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3246138U (en) |
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2023
- 2023-07-07 JP JP2023002683U patent/JP3246138U/en active Active
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