EP2108843B1 - Capteur destiné à allumer et/ou éteindre une pompe - Google Patents

Capteur destiné à allumer et/ou éteindre une pompe Download PDF

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Publication number
EP2108843B1
EP2108843B1 EP08007006A EP08007006A EP2108843B1 EP 2108843 B1 EP2108843 B1 EP 2108843B1 EP 08007006 A EP08007006 A EP 08007006A EP 08007006 A EP08007006 A EP 08007006A EP 2108843 B1 EP2108843 B1 EP 2108843B1
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EP
European Patent Office
Prior art keywords
pump
electrode
sensor
electrodes
voltage
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Application number
EP08007006A
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German (de)
English (en)
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EP2108843A1 (fr
Inventor
Klaus Vestergaard Kragelund
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.)
Grundfos Management AS
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Grundfos Management AS
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Publication date
Application filed by Grundfos Management AS filed Critical Grundfos Management AS
Priority to AT08007006T priority Critical patent/ATE485450T1/de
Priority to DE502008001581T priority patent/DE502008001581D1/de
Priority to EP08007006A priority patent/EP2108843B1/fr
Priority to US12/936,933 priority patent/US8610309B2/en
Priority to PCT/EP2009/001826 priority patent/WO2009124635A1/fr
Priority to CN200980112828.3A priority patent/CN101990603B/zh
Publication of EP2108843A1 publication Critical patent/EP2108843A1/fr
Application granted granted Critical
Publication of EP2108843B1 publication Critical patent/EP2108843B1/fr
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply

Definitions

  • the invention relates to a sensor for switching on and / or off a pump, in particular a submersible pump or basement pump.
  • Submersible pumps such as sewage pumps often have sensors or switches, which turn on the pump when exceeding a predetermined water level and turn off when falling below a generally lower second water level, the pump again.
  • sensors or switches which turn on the pump when exceeding a predetermined water level and turn off when falling below a generally lower second water level, the pump again.
  • mechanical float switch known.
  • the sensor according to the invention is for switching on and / or off a pump, in particular a submersible pump or basement pump, as used for example for basement drainage provided.
  • the sensor operates on a capacitive measuring principle and has for this purpose a first and a second electrode, which form a capacitor.
  • the condenser is arranged so that its capacity is influenced by the fluid to be delivered. That depending on the height of the liquid level or level, the capacity changes. The two extremes are defined by the condition in which there is no water between the electrodes, and the condition in which both electrodes are completely contained in the fluid, i. preferably below the water level.
  • an electronic circuit is provided, which is connected to the electrodes and the signal evaluation of the changing capacitance between the electrodes is used to generate an on and / or off signal for a pump.
  • the electronic circuit has a voltage supply connected to the first electrode.
  • This power supply is intended to electrically charge the first electrode with respect to the environment and the second electrode.
  • the power supply is designed so that it can deliver short voltage pulses for charging the first electrode.
  • Preferred is the electronic Circuit configured such that a plurality of voltage pulses of the electrode, for example between three and forty pulses, more preferably between five and twenty pulses are delivered to charge the first electrode. These short voltage pulses prevent electrolysis between the electrodes and wear of the electrodes. Preferably, a very short on-time ⁇ 1% of the total charging time is selected.
  • the electronic circuit further comprises an evaluation circuit which is designed to detect and evaluate capacitance changes between the electrodes in order to generate an on and / or off signal for the pump.
  • This evaluation circuit is designed so that it detects the current between the electrodes during a voltage increase during charging and / or a voltage drop when discharging the electrode and outputs an on and / or off signal depending on the detected current.
  • the current flowing between the electrodes during charging and discharging is proportional to the capacitance between the electrodes. In this respect can be determined from the current, whether the electrodes are in the water or not.
  • the electronic circuit according to the invention is much simpler and cheaper to build than known capacitive sensors, as can be dispensed with a high-frequency signal generator.
  • the detection of the current during charging and / or discharging is quite easy to accomplish and for charging only a pulse generator for generating the voltage pulses is required, but not a signal generator which generates a specific high-frequency signal.
  • the capacity depends on whether there is fluid between the electrodes or not. In this way, thus knowing the charge or discharge curve by measuring the current capacity can be determined.
  • the predetermined slope is steep, preferably steeper than 5V / ⁇ s.
  • Such rapid charging or discharging of the capacitor formed by the electrodes reduces or eliminates the influence of the electrical resistance between the electrodes on the charging or discharging process.
  • slower charging or discharging when there is water between the electrodes, a current would flow between the electrodes, causing a discharge. In this state, therefore, no defined charging or discharging curve with a previously known gradient could be achieved. Due to the very fast charging or preferably discharging via corresponding components in the electronic circuit, the discharge of the electrode via the fluid located between the electrodes is largely minimized or excluded.
  • the electronic circuit preferably has an unloading device which effects the unloading process with the defined pitch.
  • the slope of the voltage curve during charging or the negative slope during discharge is more preferably> 100V / ⁇ s, in particular> 500V / ⁇ s.
  • the electronic circuit is designed such that a cyclically repeating charging and discharging the electrode takes place with detection of the current during charging and / or discharging. In this way, a continuous monitoring process is performed to determine whether there is fluid between the electrodes or not.
  • the capacitive sensor can be used as a sensor for switching on a pump. Also, such a sensor can be used to turn off such a pump, wherein the switch-off is recognized by the fact that less or no fluid between the electrodes is present, ie the pump has the environment to the required level emptied or dry.
  • the electronic circuit is designed such that the electrode is first charged by a plurality of voltage pulses of the power supply and then discharged, the evaluation circuit detects the current during discharge and outputs an input and / or off depending on the detected current.
  • the detected current is representative or proportional to the capacitance between the electrodes, which in turn depends on whether there is fluid between the electrodes or not.
  • the current measurement and thereby the capacitance determination preferably takes place during a defined discharging process.
  • This discharge can be initiated and performed by an unloading device provided in the electronic circuit, so that a discharging operation can be performed with a very steep discharge curve, as described above.
  • this discharge curve is linear in the region in which the current measurement is carried out.
  • the arrangement of the electrodes determines whether the on and / or off point of the sensor is determined by them. Basically, one sensor is sufficient to determine on and off point. Thus, a switch-on signal for switching on the pump can be issued if due to the larger capacity fluid between the electrodes of the evaluation circuit is detected.
  • a switch-off signal for switching off the pump is delivered.
  • two sensors at different vertical levels and to turn on the pump by a turn-on signal of the upper sensor, this turn-on signal is generated by the evaluation circuit, when water is detected by the electrodes of this upper sensor.
  • the pump can then be switched off by a switch-off signal of the second lower sensor, which is output by its evaluation device when no water, ie air between the electrodes is detected.
  • the electronic circuit is designed such that the evaluation circuit additionally determines the electrical resistance between the two electrodes and outputs an on and / or off signal depending on the detected current and the resistance.
  • the evaluation circuit additionally determines the electrical resistance between the two electrodes and outputs an on and / or off signal depending on the detected current and the resistance.
  • this Electrodes do not form an ideal capacitance can be achieved by additional consideration of the electrical resistance of the medium, ie fluid between the electrodes greater accuracy.
  • the power supply preferably has a voltage source with one of these downstream electrical resistance and one of these parallel-connected capacitance.
  • the voltage supply preferably has a signal generator.
  • This signal generator generates the defined and at least partially very steep voltage curve when loading and particularly preferably during unloading.
  • the capacitance formed by the electrodes is discharged with a defined voltage curve over time. This voltage curve during discharging is specified by the signal generator.
  • Subject of the invention is further a pump for conveying a fluid with an electric drive motor and a control device for switching on and off of the drive motor.
  • the pump according to the invention is designed such that its control device has at least one sensor according to the preceding description, which serves to turn on and / or off the pump as a function of the fluid level.
  • the sensor which generates the switch-on signal in cooperation with the evaluation device, is arranged at a vertical level, which is the switch-on level. That is, when the fluid level reaches this switch-on level, the pump is switched on.
  • the sensor is arranged so that at this level of fluid its capacity is changed so that it is determined by the evaluation device via the discharge current and correspondingly a turn-on signal is emitted.
  • one of the electrodes is formed by the housing of the pump and the second electrode is isolated from the housing. This is particularly useful when the pump housing is made of metal.
  • the electrodes are in direct contact with the surrounding fluid, i. they are not covered by further layers of material to the pump outside.
  • the at least one sensor is arranged to generate a switch-on signal for the drive motor at a predetermined fluid level.
  • This sensor is preferably seconded in the vertically upper region of the pump.
  • a shut-off device for the pump, which has at least one detection means for detecting at least one electrical parameter of the drive motor and is designed such that on the basis of this electrical parameter, a dry run of the pump is detectable, and when dry run detected a shutdown signal for generates the drive motor.
  • the dry run can be detected, for example, due to a phase shift in the electrical operating voltage supplied to the drive motor.
  • the drive motor is preferably provided with a frequency converter for speed control. It can Means or functions of the existing frequency converter can be used to detect this phase shift and thus the dry run. However, other parameters, such as the electric current, may be used to detect dry run.
  • the detection means is then designed accordingly.
  • a protective electrode is arranged on the pump, which shields the first electrode of the sensor against electrical components in the interior of the pump.
  • this protective electrode is arranged in or on the housing further inwardly behind the first electrode, so that the protective electrode is located between electronic components in the interior of the housing and the first electrode.
  • the sensor according to the invention is a capacitive sensor, ie on and / or off timing for a pump as a function of a fluid level are determined on the basis of a changing capacitance between two electrodes 2 and 4.
  • the electrodes 2 and 4 are spaced from each other and electrically isolated from each other so arranged that the fluid to be delivered, the fluid level to be detected, affects the capacitance of the capacitor formed by the electrodes 2 and 4. This happens because in the case that fluid, for example water, is located between the electrodes 2 and 4, the capacitance changes markedly compared to a state in which there is air between the two electrodes 2 and 4. This results from the very different Permittivity of water and air. Fig.
  • FIG. 3 shows a model or equivalent circuit diagram for the arrangement of the electrodes 2 and 4 in the environment in which either air or the fluid to be delivered is located.
  • the arrangement of the electrodes 2 and 4 does not behave like an ideal capacitor.
  • This is in the equivalent circuit diagram Fig. 3 considered, there is parallel to the capacitance C, an electrical resistance R shown.
  • the measurement or detection of the capacitance between the electrodes 2 and 4 is carried out such that initially the electrodes 2 and 4 are slowly charged with low current. For this purpose, a charge can be applied to one of the electrodes 2, 4.
  • the charging is preferably carried out by a plurality of very short voltage pulses. This has the advantage that no or only a small current flow occurs between the electrodes 2 and 4, so that an electrolysis between the electrodes 2 and 4, which could lead to damage of the electrodes, is avoided.
  • the voltage curve during charging is in Fig. 1 shown.
  • the charging process takes place until time T at which the maximum charge is reached.
  • Fig. 2 At time T, the capacitor C formed by the electrodes 2 and 4 is discharged very quickly, ie the voltage drops, as in Fig. 1 shown is steep. This leads to a high discharge current, as in Fig. 2 is shown. This discharge current during the discharging process is measured. The magnitude of the discharge current is proportional to the capacitance C between the electrodes 2 and 4.
  • Fig. 4 schematically shows in a block diagram an inventive pump unit with a sensor which operates according to the previously described measuring principle.
  • the pump unit has a power supply 11, for example in the form of a connection plug for connection to the power grid, and an electric drive motor M and a control device 12, which is responsible for switching on and off of the drive motor.
  • two sensors 14 and 16 are provided, which each have two electrodes 2, 4, as described above.
  • a sensor 14 is provided for switching on the pump
  • the second sensor 16 is for switching off provided the pump.
  • the sensors 14 and 16 are arranged in two vertically spaced-apart positions.
  • the pump is turned on.
  • the pump or the drive motor M is switched off when the fluid level falls below the lower sensor 16, and the lower sensor 16 thus detects air between the electrodes 2 and 4.
  • the control device 12 has a power supply 18 for the control device 12, a controller 20 and a power switch 22.
  • the controller 20 controls the charging and discharging of the electrodes 24 of the sensors 14 and 16 in the manner described above and the current measurement and takes over the evaluation during discharge.
  • the controller correspondingly drives the power switch 22 to turn on and off the motor.
  • the controller 20 preferably carries out a continuous monitoring process in which the electrodes of the sensors 14 and 16 are periodically charged and then discharged again, with the described current measurement being carried out to detect the capacitance during each discharge process. It is conceivable that the discharge cycle and the next charge cycle are spaced in time. However, this time interval should not be too long to be able to detect the achievement of the on and off level of the fluid as soon as possible. Especially when switching off this is important to avoid prolonged dry running of the pump.
  • Fig. 5 shows in a block diagram the schematic structure of a sensor device with sensor electrodes 2 and 4 and the associated control and evaluation circuit, which will now be described in more detail.
  • the electronic circuit as essential further components a pulse generator 24 and a current sensor 26.
  • pulse shaper 28 and an output stage 30 are connected on the output side of the pulse generator 24, pulse shaper 28 and an output stage 30 are connected.
  • the output stage 30 serves to buffer the signal in order to be able to detect even highly conductive fluids with the sensor according to the invention.
  • the output stage 30 is connected via a capacitor 32 to the first electrode 2.
  • the pulse generator generates for charging the electrode 2 a plurality or a plurality of very short voltage pulses, with which the sensor electrode is charged.
  • the pulse generator 24 To discharge the pulse generator 24 generates together with the pulse shaper 28, the steep predetermined discharge curve described above.
  • the current sensor 26 detects the discharge current between the electrodes 2 and 4.
  • the output of the current sensor 26 is supplied to a sample and hold circuit 34 which stores the peak value of the discharge current and outputs a proportional voltage as an output signal.
  • This output signal is fed to the microcontroller 20 which, knowing the discharge curve, determines the capacitance between the electrodes 2 and 4 and carries out an evaluation as to whether there is fluid or water between the electrodes 2 and 4.
  • the microcontroller 20 also drives the pulse generator 24 and specifies the charge and discharge cycles.
  • the electrode 4 is coupled via a capacitor 36.
  • the coupling of the electrodes 2 and 4 via capacitors 32 and 36 isolates the electrodes 2, 4 from the electronics, so that a direct contact of a person with the electrodes 2 and 4 is harmless.
  • Fig. 6 shows a possible arrangement of the electrodes 2 and 4 in the pump unit.
  • the electrode 4 is formed by the metallic pump and / or motor housing.
  • the electrode 2 is arranged separately and via an insulator 38 to the housing 4th connected so that the electrodes 2 and 4 are electrically isolated from each other.
  • the electrodes 2 and 4 are connected via capacitors 32 and 36 to the transmitter 40.
  • the transmitter 40 comprises, as based on Fig. 5 explained, power supply 18, controller 20, pulse generator 24, current sensor 26, pulse shaper 28, power amplifier 30 and sample and hold circuit 34.
  • the transmitter 40 can also be deviating in other suitable manner to implement the measuring principle of the invention.
  • Fig. 7 shows a further possible arrangement of the electrodes 2 and 4 in the pump unit, which substantially the arrangement in Fig. 6 equivalent.
  • a protective electrode 42 is arranged between the housing which forms the second electrode 4 and the first electrode 2.
  • the guard electrode 42 is connected to an active protection circuit 44.
  • Protective electrode 42 and protective circuit 44 serve to shield electric fields which occur on the back side of the electrode 2 in the interior of the housing by the electrical or electronic components arranged there against the electrode 2, so that the electrode 2 detects only electric fields outside the housing, such as indicated by the field lines 46.
  • Fig. 8 shows again in a schematic plan view of the pump unit, the housing serves as a second electrode 4.
  • the first electrode is arranged so as to be electrically insulated from the housing and thus from the second electrode, so that a capacitance C is present between the electrodes 2 and 4 as a function of the surrounding medium or fluid.
  • Fig. 9 shows a possible arrangement of a pump 48 with a sensor 50, which, as in Fig. 5 is constructed described.
  • This sensor 50 is not integrated in the pump unit 48 but in the electrical Supply line between the power supply 11 and the pump unit 48 is arranged.
  • the sensor 50 has, as in Fig. 10 shown, two sensor electrodes 2 and 4, which form a capacitor in the manner described above with the environment.
  • the sensor 50 is located near the bottom 52. If the water or fluid level rises so high that the electrodes 2 and 4 of the sensor 50 are in the water, that is detected by the sensor and it turns on the power supply to the pump 48 so that it promotes fluid or water.
  • the capacitance of the electrodes 2 and 4 changes significantly, which is detected in the manner described above, and the sensor 50 then connects, via a power switch, the line between the power supply 11 and the pump unit 48 and thus switch off the pump set.
  • Fig. 11 shows an arrangement similar to the arrangement in Fig. 9 with the difference that two sensors 50 and 54 are provided.
  • the pump unit 48 With two sensors 50 and 54, the pump unit 48 is operated such that when the fluid level reaches the upper sensor 54 and thus its electrodes 2 and 4 are in fluid, the pump 48 is turned on.
  • the pump unit 48 is switched off when the lower sensor 50 detects air between its electrodes 2 and 4, ie, the fluid level has fallen below the vertical level of the sensor 50.
  • the motor control for the pump motor detects the dry running of the pump. This is recognizable from electrical parameters of the motor, for example based on a phase shift of the supply voltage.
  • VCC is the input voltage for the capacitive sensor.
  • C 1 is a bypass capacitor and C 2 is the capacitor that is charged to provide a certain amount of energy to the sensor.
  • VCC is the input voltage for the capacitive sensor.
  • C 1 is a bypass capacitor and C 2 is the capacitor that is charged to provide a certain amount of energy to the sensor.
  • the power supply VCC is interrupted and the sensor electrodes 2, 4 are supplied via the output A 1 alone with the voltage from the capacitor C 2 .
  • the stored energy in the capacitor C 2 is released by the capacity or the conductivity of the water. Consequently, at the end of the measurement, a residual amount of energy remains in the capacitor C 2 , so that the conductivity of the water can be determined by the remaining voltage across the capacitor C 2 .
  • U1 is a pulse shaper in the form of a Schmitt trigger. Via the input E 2 , which represents the input of the Schmitt trigger, the pulses for activating the sensor are fed to the pulse shaper U1.
  • the discharge curve or discharge rate dU / dt is specified for the sensor.
  • the transistors Q 1 and Q 2 serve to supply a higher current to the sensor output A1.
  • the diode D 1 and the resistor R 1 serve to protect the transistor Q 1 and reduced the charging speed dU / dt.
  • the capacitors C 4 and C 6 are isolating capacitors which serve to protect persons who come into contact with the electrodes 2, 4.
  • the resistor R 3 serves to detect the current flowing here between the electrodes 2, 4 and the earth, that is, the current which is proportional to the capacitance to be measured between the sensor electrodes 2, 4.
  • the capacitor C 8 is a decoupling capacitor, which allows the peak detector formed by the diode D 3 and the capacitor C 9 in conjunction with the bias circuit formed from the resistors R 4 and R 5 and the diode D 4 offset Has error near zero.
  • the capacitor C 9 serves to hold the voltage corresponding to the detected capacitance and to perform a slow digitization of the voltage via, for example, an analog-to-digital converter at the output A 2 .
  • the capacitor C 28 serves to eliminate interference or spurious oscillations.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Seal Device For Vehicle (AREA)

Claims (13)

  1. Capteur pour mettre en marche et/ou arrêter une pompe, comprenant au moins une première (2) et une deuxième (4) électrodes qui forment un condensateur (C) qui peut être influé par le fluide à véhiculer, et un circuit électronique (40) relié aux électrodes (2, 4), caractérisé en ce que le circuit électronique (40) présente une alimentation en tension (24) reliée à la première électrode (2) et conçue pour émettre de courtes impulsions de tension pour la charge de la première électrode (2), et un circuit d'évaluation (20, 26, 34) qui est conçu de façon telle qu'il détecte, pendant une montée en tension lors de la charge et/ou pendant une chute de tension lors de la décharge de l'électrode (2), le courant (Ic) entre les électrodes (2, 4) et délivre un signal de mise en marche et/ou d'arrêt en fonction du courant (Ic) détecté.
  2. Capteur selon la revendication 1, caractérisé en ce que le circuit électronique (46) est réalisé de façon à ce que, lors de la charge de l'électrode (2) et/ou lors de la décharge de l'électrode (2), l'allure temporelle du signal de la tension (U) présente, au moins sur une portion, une pente (dU/dt) prédéterminée.
  3. Capteur selon la revendication 2, caractérisé en ce que la pente (dU/dt) prédéterminée est choisie raide, de préférence plus raide que 5 V/µs.
  4. Capteur selon l'une des revendications précédentes, caractérisé en ce que le circuit électronique (40) est conçu de façon à ce qu'une charge et une décharge de l'électrode (2), se répétant de manière cyclique, s'opèrent avec la détection du courant (Ic) lors de la charge et/ou de la décharge.
  5. Capteur selon l'une des revendications précédentes, caractérisé en ce que le circuit électronique (40) est conçu de façon à ce que l'électrode (2) soit dans un premier temps chargée par plusieurs impulsions de tension de l'alimentation en tension (24), et soit ensuite déchargée, le circuit d'évaluation (20, 26, 34) détectant le courant (Ic) pendant la décharge et émettant un signal de mise en marche et/ou d'arrêt en fonction du courant (Ic) détecté.
  6. Capteur selon l'une des revendications précédentes, caractérisé en ce que le circuit électronique (40) est conçu de façon à ce que le circuit d'évaluation (20, 26, 34) détermine en outre la résistance électrique (R) entre les deux électrodes (2, 4) et émette un signal de mise en marche et/ou d'arrêt en fonction du courant (Ic) et de la résistance (R) détectés.
  7. Capteur selon l'une des revendications précédentes, caractérisé en ce que l'alimentation en tension présente une source de tension (18) comportant une résistance montée en aval de celle-ci et un condensateur monté en parallèle.
  8. Capteur selon l'une des revendications précédentes, caractérisé en ce que l'alimentation en tension présente un générateur de signaux (24) pour produire une tension de charge et/ou de décharge ayant une allure de signal définie.
  9. Pompe pour acheminer un fluide, comprenant un moteur d'entraînement électrique et un dispositif de commande (12) permettant la mise en circuit et l'arrêt du moteur d'entraînement (M), caractérisée en ce que le dispositif de commande (12) présente au moins un capteur (14, 16, 36) selon l'une des revendications précédentes pour la mise en marche et/ou l'arrêt de la pompe en fonction d'un niveau de fluide.
  10. Pompe selon la revendication 9, caractérisée en ce que l'une des électrodes (4) est formée du carter de la pompe et la deuxième électrode (2) est disposée de manière isolée par rapport au carter.
  11. Pompe selon la revendication 9 ou 10, caractérisée en ce que le capteur (14, 16, 50) est disposé pour émettre un signal de mise en circuit du moteur d'entraînement en présence d'un niveau de fluide prédéterminé.
  12. Pompe selon l'une des revendications 9 à 11, caractérisée en ce qu'est prévu un dispositif d'arrêt de la pompe qui présente au moins un moyen de détection permettant de détecter au moins un paramètre électrique du moteur d'entraînement (M) et est conçu de façon à permettre, sur la base de ce paramètre électrique, la détection d'une marche à sec de la pompe et en cas de détection d'une marche à sec l'émission d'un signal d'arrêt du moteur d'entraînement (M).
  13. Pompe selon l'une des revendications 9 à 12, caractérisée en ce qu'est disposée une électrode de garde (42) qui protège la première électrode (2) du capteur vis-à-vis de composants électriques à l'intérieur de la pompe.
EP08007006A 2008-04-09 2008-04-09 Capteur destiné à allumer et/ou éteindre une pompe Active EP2108843B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT08007006T ATE485450T1 (de) 2008-04-09 2008-04-09 Sensor zum ein- und/oder ausschalten einer pumpe
DE502008001581T DE502008001581D1 (de) 2008-04-09 2008-04-09 Sensor zum Ein- und/oder Ausschalten einer Pumpe
EP08007006A EP2108843B1 (fr) 2008-04-09 2008-04-09 Capteur destiné à allumer et/ou éteindre une pompe
US12/936,933 US8610309B2 (en) 2008-04-09 2009-03-13 Sensor for switching a pump on and/or off
PCT/EP2009/001826 WO2009124635A1 (fr) 2008-04-09 2009-03-13 Capteur pour la mise en marche et/ou l'arrêt d'une pompe
CN200980112828.3A CN101990603B (zh) 2008-04-09 2009-03-13 用于启动或关闭泵的传感器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08007006A EP2108843B1 (fr) 2008-04-09 2008-04-09 Capteur destiné à allumer et/ou éteindre une pompe

Publications (2)

Publication Number Publication Date
EP2108843A1 EP2108843A1 (fr) 2009-10-14
EP2108843B1 true EP2108843B1 (fr) 2010-10-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08007006A Active EP2108843B1 (fr) 2008-04-09 2008-04-09 Capteur destiné à allumer et/ou éteindre une pompe

Country Status (6)

Country Link
US (1) US8610309B2 (fr)
EP (1) EP2108843B1 (fr)
CN (1) CN101990603B (fr)
AT (1) ATE485450T1 (fr)
DE (1) DE502008001581D1 (fr)
WO (1) WO2009124635A1 (fr)

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DE102022132634A1 (de) 2022-12-08 2024-06-13 Seepex Gmbh Pumpe und Verfahren zur Überwachung einer Pumpe

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US20140069353A1 (en) * 2012-09-11 2014-03-13 Marcos Jimenez Coffee maker water heater
DK3242034T3 (da) 2013-03-19 2019-08-12 Flow Control LLC Lavprofilpumpe med evnen til at blive monteret i forskellige konfigurationer
GB2531291B (en) 2014-10-14 2019-12-04 Aspen Pumps Ltd Liquid level detector
US10378544B2 (en) 2015-04-09 2019-08-13 Brian Rosser Rejniak Apparatus, systems and methods for protecting pumps
CA3008802C (fr) * 2015-11-20 2019-07-02 Baker Hughes, A Ge Company, Llc Systemes et procedes de detection de conditions d'arret de pompage et de commande d'un moteur pour eviter un coup de belier
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ATE485450T1 (de) 2010-11-15
CN101990603B (zh) 2015-09-30
WO2009124635A1 (fr) 2009-10-15
US8610309B2 (en) 2013-12-17
EP2108843A1 (fr) 2009-10-14
DE502008001581D1 (de) 2010-12-02
US20110027104A1 (en) 2011-02-03
CN101990603A (zh) 2011-03-23

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