EP1672216A1 - Pump having protection means against freezing - Google Patents

Pump having protection means against freezing Download PDF

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Publication number
EP1672216A1
EP1672216A1 EP05024983A EP05024983A EP1672216A1 EP 1672216 A1 EP1672216 A1 EP 1672216A1 EP 05024983 A EP05024983 A EP 05024983A EP 05024983 A EP05024983 A EP 05024983A EP 1672216 A1 EP1672216 A1 EP 1672216A1
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EP
European Patent Office
Prior art keywords
pump
predetermined temperature
temperature
controller
medium
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
EP05024983A
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German (de)
French (fr)
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EP1672216B1 (en
Inventor
Hans-Joachim Schaller
Bernhard Niemann
Konrad Westermann
Achim Thäsler
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Metabowerke GmbH and Co
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Metabowerke GmbH and Co
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Publication of EP1672216A1 publication Critical patent/EP1672216A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/08—Cooling; Heating; Preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/28—Safety arrangements; Monitoring
    • 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
    • F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
    • 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
    • F04D15/0077—Safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/19—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/78—Warnings

Definitions

  • the present invention relates to a pump having the features of the preamble of claim 1, d. H. a pump with an antifreeze device for the medium to be pumped.
  • a pump with a frost protection device (DE 103 31 602 A1) is known, which protects the pump from damage when freezing the medium to be pumped in the pump.
  • the frost protection device protects the shaft of the pump unit from frost damage by having an elastic support for the shaft.
  • a displacement body is provided which keeps the liquid medium in the pump housing away from the shaft.
  • an elastic membrane is provided, which closes a drain opening. This elastic membrane expands during frost, thus preventing ice pressure on the shaft.
  • the antifreeze device has several components, the interaction of which should prevent damage to the pump when freezing occurs, and is therefore structurally complex and prone to failure.
  • the pump has a temperature sensor in communication with a controller. Upon reaching a predetermined temperature, the controller controls the pump set down or turns it off completely to prevent overheating of the drive motor.
  • the invention is based on the problem to provide a pump with a frost protection device, in which the frost protection device is designed structurally simple and effective at the same time.
  • the antifreeze device has a control with at least one temperature sensor, which turns on the pump unit when reaching or falling below a first predetermined temperature.
  • the pump unit then runs for a predetermined time or until reaching or exceeding a second predetermined temperature.
  • heat is generated, which prevents freezing of the pump housing located in the medium to be conveyed, so that there is no ice formation in the pump.
  • the frost protection device is thus realized by the control of the pump unit in accordance with the temperatures detected in the pump.
  • the controller can be used simultaneously to protect against overheating of the pump unit.
  • the second predetermined temperature at which the pump unit is turned off is then chosen so that in pumping mode with continuous delivery of the medium, for example, even in summer, this temperature is not reached.
  • it is switched off only when the pump unit is running, but no or only too little to be pumped medium is pumped, z. B. as the outlet or arranged at the outlet line is closed.
  • the controller has two temperature sensors, which are preferably designed as switching sensors.
  • the first temperature sensor is used to switch on the pump unit when reaching or falling below the first predetermined temperature.
  • the second temperature sensor is used to switch off the pump unit when reaching or exceeding the second predetermined temperature. Since the temperature sensors are disconnected, one can arrange each of the temperature sensors at the most favorable position for its function.
  • the control is realized in switching sensors in a particularly simple manner by the sensors themselves.
  • FIGURE shows a schematic representation of a pump according to the invention with antifreeze device.
  • the figure shows a pump with a pump housing 1.
  • a pump unit 1 ' is arranged in the pump housing 1.
  • the pump housing 1 has an inlet 2 and an outlet 3 for the medium to be delivered.
  • a pump chamber 4 is formed, in which the medium to be pumped is pumped.
  • hoses o. The like. Be connected to transport the medium to be delivered over longer distances.
  • the pump also has an antifreeze device 5.
  • the antifreeze device 5 has a controller 6 with at least one temperature sensor 7. If required or depending on the configuration of the controller 6, further temperature sensors 8 can be provided. This will be explained in more detail below.
  • the controller 6 is designed so that it turns on the pump unit 1 'when reaching or falling below a first predetermined temperature and off after a predetermined time and / or upon reaching or exceeding a second predetermined temperature.
  • the second predetermined temperature is higher than the first predetermined temperature.
  • the first and the second predetermined temperature can both be measured at the one temperature sensor 7. Shown is an embodiment with two temperature sensors 7, 8. These are arranged here and preferably at different locations. Preferred is an arrangement in which the first temperature sensor 7 is arranged in a region which is particularly sensitive to low temperatures, while the second temperature sensor 8 is arranged in a region where high temperatures are set particularly early.
  • the time control, the achievement of the second predetermined temperature or a combination of both is preferred depends on the application of the pump, in particular the usually maximum occurring temperatures, and the operation of the antifreeze device.
  • the pump can z. B. operated in winter in two ways.
  • the outlet 3 or a line arranged at the outlet 3 is closed.
  • the pump thus pumps no medium to be conveyed, but merely moves the present in the pump housing 1 to be conveyed medium.
  • the temperature in the pump housing 1 increases relatively quickly in this mode. If the pump unit 1 'is not specifically switched off, it can lead to overheating of the pump unit 1'. In this mode of operation, switching off when reaching a second predetermined temperature is therefore preferred.
  • the pump can also be operated so that it runs after switching on reaching the first predetermined temperature in pumping operation. So it is constantly moving medium to be moved by the pump.
  • the medium to be delivered acts simultaneously as a coolant, so that the temperature in the pump housing 1 increases only slowly. In this mode, switching off the pump unit 1 'after a predetermined time is advantageous.
  • the controller 6 may finally be designed so that it turns off the pump unit 1 ', as soon as one of the two criteria, ie reaching a predetermined Time or reaching the second predetermined temperature, is met.
  • the controller 6 may be designed accordingly as control electronics to perceive any or all of the options described above.
  • the first predetermined temperature is chosen so that it is slightly higher than the freezing point of the medium to be pumped. It should be ensured that the temperature is high enough to prevent freezing of the medium to be pumped, but at the same time is not too high, so that the pump unit 1 'is not turned on unnecessarily often.
  • the first predetermined temperature is suitably between about 0.5 ° C and about 5 ° C, preferably about 2 ° C. These and all other temperature data refer to normal conditions.
  • the second predetermined temperature is expediently between about 15 ° C and about 60 ° C, preferably between about 20 ° C and about 35 ° C with water as the medium to be conveyed.
  • the controller 6 may comprise a humidity sensor or a means for detecting a filling of the pump chamber 4 with medium to be conveyed. If the pumping chamber 4 does not contain a medium to be conveyed or has been found to be sufficiently dry due to the measurement of the humidity sensor, then it can be provided that the pumping unit is not switched on even when the first predetermined temperature is reached or fallen below. The danger of freezing is in fact not given in such a case.
  • the controller 6 here and preferably has two temperature sensors 7, 8, the first temperature sensor 7 serving to detect the first predetermined temperature and the second temperature sensor 8 to detect the second predetermined temperature.
  • the first temperature sensor 7 serving to detect the first predetermined temperature
  • the second temperature sensor 8 to detect the second predetermined temperature.
  • the one or more temperature sensors 7, 8 may be designed as a switching sensors, so that the controller 6 is designed according to simple.
  • a switching sensors are, for example, bimetallic switches.
  • the temperature sensor (s) 7, 8 can also be designed as non-switching temperature sensors which transmit a signal corresponding to the temperature to the controller 6.
  • An example of such a temperature sensor is a PTC resistor. With a PTC resistor, the resistance changes as a function of the temperature. The controller 6 thus detects the resistance of the PTC resistor and detects it due to the known temperature curve of the PTC resistor, the temperature so that a corresponding control of the pump unit 1 'can take place.
  • the temperature sensors 7, 8 are arranged in the embodiment shown, the pump on the wall of the pump chamber 4 spaced from each other. They can be separated for protection by means of a thin layer or film of the medium to be conveyed, wherein the film has a sufficient thermal conductivity. Alternatively, arrangements of the temperature sensors 7, 8 in or on the pump chamber 4 are possible elsewhere.
  • the arrangement of the temperature sensor 8 is chosen particularly expedient here. This is namely located directly on the pump unit 1 ', but is flowed around by the medium to be conveyed. The temperature sensor 8 is thus at a point at which high temperatures are particularly early when overloading the pump unit 1 ', but is nevertheless positioned so that the temperature of the medium to be conveyed is reliably detected.
  • the first predetermined temperature and the second predetermined temperature are adjustable by the user of the pump.
  • the pump can thus be easily adapted to different media to be conveyed. Alternatively, it is possible to make even a temperature adjustable.
  • the controller 6 has a means 9 for detecting the pumping operation. It is thus detected whether medium to be pumped leaves the pump, or whether the pump moves only the medium in the pump.
  • the controller 6 is further adapted to the pump unit 1 ' shuts off in a pumping operation after a predetermined time, if it has previously turned on the pump unit 1 'due to reaching or falling below the first predetermined temperature. This ensures that the pump is not operated unnecessarily long, although reaching the second predetermined temperature is not possible. At the same time it is prevented that the pump automatically shuts off after a certain time when desired continuous operation.
  • the means 9 for detecting the pumping operation can be embodied, for example, as a pressure sensor or as a flowmeter.
  • the controller 6 has here and preferably on an alarm generator 10.
  • the alarm generator 10 is controlled so that it emits an alarm signal when the first predetermined temperature is reached or exceeded.
  • an alarm signal can also be present when the second predetermined temperature is reached or exceeded.
  • an alarm signal is issued only when reaching or falling below the first predetermined temperature or when reaching or exceeding the second predetermined temperature.
  • the alarm signal is here and preferably a visual indicator and an audible signal.
  • the alarm signal is different in the embodiment shown here for the various predetermined temperatures, so that the alarm signal itself can already detect the cause of the triggering of the alarm signal.

Abstract

The pump has an anti-frost device (5) which has a control system (6) with a temperature sensor (7). The control system switches on the pumping unit when temperature of the medium to be conveyed falls below the first pre-set temperature. The pumping unit is switched-off by the control system when the temperature of the medium exceeds second pre-set temperature which is higher than first pre-set temperature.

Description

Die vorliegende Erfindung betrifft eine Pumpe mit den Merkmalen des Oberbegriffs von Anspruch 1, d. h. eine Pumpe mit einer Frostschutzeinrichtung für das zu fördernde Medium.The present invention relates to a pump having the features of the preamble of claim 1, d. H. a pump with an antifreeze device for the medium to be pumped.

Bei Pumpen, die im Freien bzw. bei tiefen Temperaturen verwendet werden, besteht die Gefahr, daß ein im Pumpengehäuse, insbesondere im Pumpraum befindliches Medium einfriert. Der dabei entstehende Druck kann zu einer Beschädigung der Pumpe führen.For pumps that are used outdoors or at low temperatures, there is a risk that a medium contained in the pump housing, in particular in the pump chamber freezes. The resulting pressure can damage the pump.

Aus dem Stand der Technik ist eine Pumpe mit einer Frostschutzeinrichtung (DE 103 31 602 A1) bekannt, die bei Einfrieren des zu fördernden Mediums in der Pumpe die Pumpe vor einer Beschädigung schützt. Die Frostschutzeinrichtung schützt die Welle des Pumpaggregates vor Frostschäden dadurch, daß sie eine elastische Lagerung für die Welle aufweist. Ferner ist ein Verdrängungskörper vorgesehen, der das in dem Pumpengehäuse befindliche flüssige Medium von der Welle fernhält. Zusätzlich ist eine elastische Membrane vorgesehen, die eine Ablauföffnung verschließt. Diese elastische Membrane dehnt sich bei Frost aus und verhindert so einen Eisdruck an der Welle. Die Frostschutzeinrichtung weist mehrere Komponenten auf, deren Zusammenwirken eine Schädigung der Pumpe bei Auftreten von Frost verhindern soll, und ist daher konstruktiv aufwendig und störanfällig.From the prior art, a pump with a frost protection device (DE 103 31 602 A1) is known, which protects the pump from damage when freezing the medium to be pumped in the pump. The frost protection device protects the shaft of the pump unit from frost damage by having an elastic support for the shaft. Furthermore, a displacement body is provided which keeps the liquid medium in the pump housing away from the shaft. In addition, an elastic membrane is provided, which closes a drain opening. This elastic membrane expands during frost, thus preventing ice pressure on the shaft. The antifreeze device has several components, the interaction of which should prevent damage to the pump when freezing occurs, and is therefore structurally complex and prone to failure.

Aus dem Stand der Technik ist es ferner bekannt, eine Pumpe mit einem Schutz vor Überhitzung zu versehen (DE 196 49 766 C1). Die Pumpe weist einen Temperatursensor auf, der mit einer Steuerung in Verbindung steht. Bei Erreichen einer vorbestimmten Temperatur regelt die Steuerung das Pumpenaggregat herunter bzw. schaltet dieses ganz aus, um eine Überhitzung des Antriebsmotors zu vermeiden.From the prior art, it is also known to provide a pump with protection against overheating (DE 196 49 766 C1). The pump has a temperature sensor in communication with a controller. Upon reaching a predetermined temperature, the controller controls the pump set down or turns it off completely to prevent overheating of the drive motor.

Bekannt ist es, bei Pumpen, die mit einer Betriebsflüssigkeit der Pumpe selbst arbeiten, beispielsweise mit Betriebswasser bei einer Flüssigkeitsring-Vakuumpumpe (DE 38 17 432 A1) oder mit einem Hydraulikfluid bei einem elektrohydraulischen Pumpenaggregat (DE 83 23 298 U1) eine Frostschutzeinrichtung für diese Betriebsflüssigkeit dergestalt vorzusehen, daß die Temperatur der Betriebsflüssigkeit überwacht und bei Erreichen einer vorgegebenen Minimaltemperatur die Pumpe vorübergehend in Betrieb genommen und die Betriebsflüssigkeit umgepumt wird. Die Temperatur der Betriebsflüssigkeit erhöht sich wieder über den Minimalwert hinaus, so daß, bei Vorliegen einer gewissen Hysterese, dann eine Abschaltung der im Leerlauf arbeitenden Pumpe erfolgt. Diese Arbeitsweise hat die Entwicklung bei Pumpen mit einer Frostschutzeinrichtung für das zu fördernde Medium selbst nicht beeinflußt.It is known in pumps that work with a working fluid of the pump itself, for example, with process water in a liquid ring vacuum pump (DE 38 17 432 A1) or with a hydraulic fluid in an electro-hydraulic pump unit (DE 83 23 298 U1) an antifreeze for To provide this operating fluid such that the temperature of the operating fluid is monitored and taken on reaching a predetermined minimum temperature, the pump temporarily in operation and the operating fluid is pumped. The temperature of the operating fluid increases again above the minimum value, so that, in the presence of a certain hysteresis, then a shutdown of the operating at idle pump. This operation has not affected the development of pumps with a frost protection device for the medium to be pumped itself.

Der Erfindung liegt das Problem zugrunde, eine Pumpe mit einer Frostschutzeinrichtung anzugeben, bei der die Frostschutzeinrichtung konstruktiv einfach und gleichzeitig effektiv ausgestaltet ist.The invention is based on the problem to provide a pump with a frost protection device, in which the frost protection device is designed structurally simple and effective at the same time.

Die Erfindung löst das zuvor erläuterte Problem bei einer Pumpe mit den Merkmalen des Oberbegriffs von Anspruch 1 durch die Merkmale des kennzeichnenden Teils von Anspruch 1. Bevorzugte Ausgestaltungen und Weiterbildungen sind Gegenstand der Unteransprüche.The invention solves the problem explained above in a pump having the features of the preamble of claim 1 by the features of the characterizing part of claim 1. Preferred embodiments and further developments are the subject of the dependent claims.

Die Lösung des Problems wird nach der Erfindung dadurch erreicht, daß die Frostschutzeinrichtung eine Steuerung mit zumindest einem Temperatursensor aufweist, die das Pumpaggregat bei Erreichen oder Unterschreiten einer ersten vorgegebenen Temperatur einschaltet. Das Pumpaggregat läuft dann eine vorgegebene Zeit oder bis zum Erreichen oder Überschreiten einer zweiten vorgegebenen Temperatur. Beim Laufen des Pumpaggregates entsteht Wärme, die ein Einfrieren des in dem Pumpengehäuse befindlichen zu fördernden Mediums verhindert, so daß es nicht zu einer Eisbildung in der Pumpe kommt. Die Frostschutzeinrichtung ist somit durch die Steuerung des Pumpaggregates nach Maßgabe der in der Pumpe festgestellten Temperaturen realisiert.The solution to the problem is achieved according to the invention in that the antifreeze device has a control with at least one temperature sensor, which turns on the pump unit when reaching or falling below a first predetermined temperature. The pump unit then runs for a predetermined time or until reaching or exceeding a second predetermined temperature. When running the pump unit heat is generated, which prevents freezing of the pump housing located in the medium to be conveyed, so that there is no ice formation in the pump. The frost protection device is thus realized by the control of the pump unit in accordance with the temperatures detected in the pump.

In bevorzugter Ausführung kann die Steuerung gleichzeitig zum Schutz vor Überhitzung des Pumpaggregates genutzt werden. Die zweite vorgegebene Temperatur, bei der das Pumpaggregat abgeschaltet wird, ist dann so gewählt, daß im Pumpbetrieb mit dauernder Förderung des Mediums beispielsweise auch im Sommer diese Temperatur nicht erreicht wird. Abgeschaltet wird somit nur dann, wenn das Pumpaggregat läuft, aber kein oder nur zu wenig zu förderndes Medium gepumpt wird, z. B. da der Auslaß oder eine am Auslaß angeordnete Leitung verschlossen ist.In a preferred embodiment, the controller can be used simultaneously to protect against overheating of the pump unit. The second predetermined temperature at which the pump unit is turned off, is then chosen so that in pumping mode with continuous delivery of the medium, for example, even in summer, this temperature is not reached. Thus, it is switched off only when the pump unit is running, but no or only too little to be pumped medium is pumped, z. B. as the outlet or arranged at the outlet line is closed.

Weiter vorteilhaft ist es, wenn die Steuerung zwei Temperatursensoren aufweist, die vorzugsweise als schaltende Sensoren ausgeführt sind. Der erste Temperatursensor dient zum Einschalten des Pumpaggregates bei Erreichen oder Unterschreiten der ersten vorgegebenen Temperatur. Der zweite Temperatursensor dient zum Ausschalten des Pumpaggregates bei Erreichen oder Überschreiten der zweiten vorgegebenen Temperatur. Da die Temperatursensoren getrennt sind, kann man jeden der Temperatursensoren an der für seine Funktion günstigsten Stelle anordnen. Die Steuerung ist bei schaltenden Sensoren auf besonders einfache Weise durch die Sensoren selbst realisiert.It is also advantageous if the controller has two temperature sensors, which are preferably designed as switching sensors. The first temperature sensor is used to switch on the pump unit when reaching or falling below the first predetermined temperature. The second temperature sensor is used to switch off the pump unit when reaching or exceeding the second predetermined temperature. Since the temperature sensors are disconnected, one can arrange each of the temperature sensors at the most favorable position for its function. The control is realized in switching sensors in a particularly simple manner by the sensors themselves.

Weitere Einzelheiten, Merkmale, Ziele und Vorteile der vorliegenden Erfindung werden nachfolgend anhand einer Zeichnung eines bevorzugten Ausführungsbeispiels näher erläutert. Die einzige Figur zeigt eine schematische Darstellung einer erfindungsgemäßen Pumpe mit Frostschutzeinrichtung.Further details, features, objects and advantages of the present invention will be explained in more detail with reference to a drawing of a preferred embodiment. The single FIGURE shows a schematic representation of a pump according to the invention with antifreeze device.

Die Figur zeigt eine Pumpe mit einem Pumpengehäuse 1. In dem Pumpengehäuse 1 ist ein Pumpaggregat 1' angeordnet. Das Pumpengehäuse 1 weist einen Einlaß 2 und einen Auslaß 3 für das zu fördernde Medium auf. Zwischen dem Einlaß 2 und dem Auslaß 3 ist ein Pumpraum 4 ausgebildet, in dem das zu fördernde Medium gepumpt wird. An den Einlaß 2 und/oder den Auslaß 3 können Leitungen, Schläuche o. dgl. angeschlossen werden, um das zu fördernde Medium über längere Strecken zu transportieren.The figure shows a pump with a pump housing 1. In the pump housing 1, a pump unit 1 'is arranged. The pump housing 1 has an inlet 2 and an outlet 3 for the medium to be delivered. Between the inlet 2 and the outlet 3, a pump chamber 4 is formed, in which the medium to be pumped is pumped. At the inlet 2 and / or the outlet 3 lines, hoses o. The like. Be connected to transport the medium to be delivered over longer distances.

Die Pumpe weist ferner eine Frostschutzeinrichtung 5 auf. Die Frostschutzeinrichtung 5 weist eine Steuerung 6 mit zumindest einem Temperatursensor 7 auf. Bei Bedarf bzw. je nach Ausgestaltung der Steuerung 6 können weitere Temperatursensoren 8 vorgesehen sein. Dies wird im folgenden noch näher erläutert.The pump also has an antifreeze device 5. The antifreeze device 5 has a controller 6 with at least one temperature sensor 7. If required or depending on the configuration of the controller 6, further temperature sensors 8 can be provided. This will be explained in more detail below.

Die Steuerung 6 ist so ausgeführt, daß sie das Pumpaggregat 1' bei Erreichen oder Unterschreiten einer ersten vorgegebenen Temperatur einschaltet und nach einer vorgegebenen Zeit und/oder bei Erreichen oder Überschreiten einer zweiten vorgegebenen Temperatur ausschaltet. Die zweite vorgegebene Temperatur ist dabei höher als die erste vorgegebene Temperatur. Die erste und die zweite vorgegebene Temperatur können beide an dem einen Temperatursensor 7 gemessen werden. Gezeigt ist eine Ausführung mit zwei Temperatursensoren 7, 8. Diese sind hier und vorzugsweise an unterschiedlichen Stellen angeordnet. Bevorzugt ist eine Anordnung, bei der der erste Temperatursensor 7 in einem Bereich angeordnet ist, der besonders empfindlich gegenüber tiefen Temperaturen ist, während der zweite Temperatursensor 8 in einem Bereich angeordnet ist, an dem sich hohe Temperaturen besonders früh einstellen.The controller 6 is designed so that it turns on the pump unit 1 'when reaching or falling below a first predetermined temperature and off after a predetermined time and / or upon reaching or exceeding a second predetermined temperature. The second predetermined temperature is higher than the first predetermined temperature. The first and the second predetermined temperature can both be measured at the one temperature sensor 7. Shown is an embodiment with two temperature sensors 7, 8. These are arranged here and preferably at different locations. Preferred is an arrangement in which the first temperature sensor 7 is arranged in a region which is particularly sensitive to low temperatures, while the second temperature sensor 8 is arranged in a region where high temperatures are set particularly early.

Ob zum Ausschalten des Pumpaggregates 1' die Zeitsteuerung, das Erreichen der zweiten vorgegebenen Temperatur oder eine Kombination aus beiden bevorzugt ist, hängt von dem Einsatzgebiet der Pumpe, insbesondere den üblicherweise maximal auftretenden Temperaturen, und der Betriebsweise der Frostschutzeinrichtung ab.Whether to turn off the pump unit 1 ', the time control, the achievement of the second predetermined temperature or a combination of both is preferred depends on the application of the pump, in particular the usually maximum occurring temperatures, and the operation of the antifreeze device.

Die Pumpe kann z. B. im Winter auf zweierlei Arten betrieben werden.The pump can z. B. operated in winter in two ways.

In der ersten Betriebsart ist zumindest der Auslaß 3 bzw. eine an dem Auslaß 3 angeordnete Leitung verschlossen. Die Pumpe pumpt also kein zu förderndes Medium, sondern bewegt lediglich das in dem Pumpengehäuse 1 vorhandene zu fördernde Medium. Die Temperatur in dem Pumpengehäuse 1 steigt bei dieser Betriebsweise relativ schnell an. Wenn das Pumpaggregat 1' nicht gezielt ausgeschaltet wird, kann es zu einer Überhitzung des Pumpaggregates 1' kommen. Bei dieser Betriebsweise ist daher das Ausschalten bei Erreichen einer zweiten vorgegebenen Temperatur bevorzugt.In the first operating mode, at least the outlet 3 or a line arranged at the outlet 3 is closed. The pump thus pumps no medium to be conveyed, but merely moves the present in the pump housing 1 to be conveyed medium. The temperature in the pump housing 1 increases relatively quickly in this mode. If the pump unit 1 'is not specifically switched off, it can lead to overheating of the pump unit 1'. In this mode of operation, switching off when reaching a second predetermined temperature is therefore preferred.

Die Pumpe kann aber auch derart betrieben werden, daß sie nach dem Einschalten aufgrund Erreichens der ersten vorgegebenen Temperatur im Pumpbetrieb läuft. Es wird also ständig zu förderndes Medium durch die Pumpe bewegt. Das zu fördernde Medium wirkt dabei gleichzeitig als Kühlmittel, so daß die Temperatur in dem Pumpengehäuse 1 nur langsam ansteigt. Bei dieser Betriebsweise ist ein Ausschalten des Pumpaggregates 1' nach einer vorgegebenen Zeit vorteilhaft.However, the pump can also be operated so that it runs after switching on reaching the first predetermined temperature in pumping operation. So it is constantly moving medium to be moved by the pump. The medium to be delivered acts simultaneously as a coolant, so that the temperature in the pump housing 1 increases only slowly. In this mode, switching off the pump unit 1 'after a predetermined time is advantageous.

Die Steuerung 6 kann schließlich so ausgelegt sein, daß sie das Pumpaggregat 1' ausschaltet, sobald eines der beiden Kriterien, also Erreichen einer vorgegebenen Zeit oder Erreichen der zweiten vorgegebenen Temperatur, erfüllt ist. Die Steuerung 6 kann entsprechend als Steuerelektronik ausgeführt sein, um einzelne oder alle der zuvor beschriebenen Möglichkeiten wahrzunehmen.The controller 6 may finally be designed so that it turns off the pump unit 1 ', as soon as one of the two criteria, ie reaching a predetermined Time or reaching the second predetermined temperature, is met. The controller 6 may be designed accordingly as control electronics to perceive any or all of the options described above.

Die erste vorgegebene Temperatur ist so gewählt, daß sie etwas höher ist als der Gefrierpunkt des zu fördernden Mediums. Dabei ist sicherzustellen, daß die Temperatur hoch genug ist, um ein Einfrieren des zu fördernden Mediums zu verhindern, gleichzeitig aber nicht zu hoch ist, damit das Pumpaggregat 1' nicht unnötig oft eingeschaltet wird.The first predetermined temperature is chosen so that it is slightly higher than the freezing point of the medium to be pumped. It should be ensured that the temperature is high enough to prevent freezing of the medium to be pumped, but at the same time is not too high, so that the pump unit 1 'is not turned on unnecessarily often.

Wenn die Pumpe zur Förderung von Wasser eingesetzt wird, beträgt die erste vorgegebene Temperatur zweckmäßigerweise zwischen etwa 0,5 °C und etwa 5 °C, vorzugsweise etwa 2 °C. Diese und alle weiteren Temperaturangaben beziehen sich auf Normalbedingungen.When the pump is used to deliver water, the first predetermined temperature is suitably between about 0.5 ° C and about 5 ° C, preferably about 2 ° C. These and all other temperature data refer to normal conditions.

Die zweite vorgegebene Temperatur beträgt bei Wasser als zu förderndem Medium zweckmäßigerweise zwischen etwa 15 °C und etwa 60 °C, vorzugsweise zwischen etwa 20 °C und etwa 35 °C.The second predetermined temperature is expediently between about 15 ° C and about 60 ° C, preferably between about 20 ° C and about 35 ° C with water as the medium to be conveyed.

Ferner kann die Steuerung 6 einen Feuchtesensor oder ein Mittel zur Erfassung einer Füllung des Pumpraums 4 mit zu förderndem Medium aufweisen. Sollte der Pumpraum 4 kein zu förderndes Medium beinhalten bzw. aufgrund der Messung des Feuchtesensors als hinreichend trocken festgestellt sein, so kann dabei vorgesehen sein, daß das Pumpaggregat auch bei Erreichen oder Unterschreiten der ersten vorgegebenen Temperatur nicht eingeschaltet wird. Die Gefahr des Einfrierens ist in einem solchen Fall nämlich nicht gegeben.Furthermore, the controller 6 may comprise a humidity sensor or a means for detecting a filling of the pump chamber 4 with medium to be conveyed. If the pumping chamber 4 does not contain a medium to be conveyed or has been found to be sufficiently dry due to the measurement of the humidity sensor, then it can be provided that the pumping unit is not switched on even when the first predetermined temperature is reached or fallen below. The danger of freezing is in fact not given in such a case.

Wie bereits zuvor beschrieben wurde, weist die Steuerung 6 hier und vorzugsweise zwei Temperatursensoren 7, 8 auf, wobei der erste Temperatursensor 7 zum Erfassen der ersten vorgegebenen Temperatur und der zweite Temperatursensor 8 zum Erfassen der zweiten vorgegebenen Temperatur dient. Eine solche Anordnung ist besonders dann vorteilhaft, wenn die Temperaturen an unterschiedlichen Stellen erfaßt werden sollen.As already described above, the controller 6 here and preferably has two temperature sensors 7, 8, the first temperature sensor 7 serving to detect the first predetermined temperature and the second temperature sensor 8 to detect the second predetermined temperature. Such an arrangement is particularly advantageous when the temperatures are to be detected at different locations.

Der oder die Temperatursensoren 7, 8 können als schaltende Sensoren ausgeführt sein, so daß die Steuerung 6 entsprechend einfach ausgeführt ist. Als schaltende Sensoren eignen sich beispielsweise Bimetallschalter. Der bzw. die Temperatursensoren 7, 8 können aber auch als nicht schaltende Temperatursensoren ausgeführt sein, die ein der Temperatur entsprechendes Signal an die Steuerung 6 übermitteln. Ein Beispiel für einen solchen Temperatursensor ist ein PTC-Widerstand. Bei einem PTC-Widerstand ändert sich der Widerstand in Abhängigkeit von der Temperatur. Die Steuerung 6 erfaßt also den Widerstandswert des PTC-Widerstandes und erkennt daraus aufgrund der bekannten Temperaturkurve des PTC-Widerstandes die Temperatur, so daß eine entsprechende Steuerung des Pumpaggregates 1' stattfinden kann.The one or more temperature sensors 7, 8 may be designed as a switching sensors, so that the controller 6 is designed according to simple. As a switching sensors are, for example, bimetallic switches. However, the temperature sensor (s) 7, 8 can also be designed as non-switching temperature sensors which transmit a signal corresponding to the temperature to the controller 6. An example of such a temperature sensor is a PTC resistor. With a PTC resistor, the resistance changes as a function of the temperature. The controller 6 thus detects the resistance of the PTC resistor and detects it due to the known temperature curve of the PTC resistor, the temperature so that a corresponding control of the pump unit 1 'can take place.

Die Temperatursensoren 7, 8 sind in dem gezeigten Ausführungsbeispiel der Pumpe an der Wandung des Pumpraums 4 voneinander beabstandet angeordnet. Sie können dabei zum Schutz mittels einer dünnen Schicht oder Folie von dem zu fördernden Medium getrennt sein, wobei die Folie eine hinreichende Temperaturleitfähigkeit aufweist. Alternativ sind auch Anordnungen der Temperatursensoren 7, 8 im oder am Pumpraum 4 an anderer Stelle möglich. Die Anordnung des Temperatursensors 8 ist hier besonders zweckmäßig gewählt. Dieser befindet sich nämlich unmittelbar am Pumpaggregat 1', wird jedoch vom zu fördernden Medium umströmt. Der Temperatursensor 8 liegt damit an einer Stelle, an der sich hohe Temperaturen bei Überlastung des Pumpaggregats 1' besonders früh einstellen, ist aber trotzdem so positioniert, daß auch die Temperatur des zu fördernden Mediums sicher erfaßt wird.The temperature sensors 7, 8 are arranged in the embodiment shown, the pump on the wall of the pump chamber 4 spaced from each other. They can be separated for protection by means of a thin layer or film of the medium to be conveyed, wherein the film has a sufficient thermal conductivity. Alternatively, arrangements of the temperature sensors 7, 8 in or on the pump chamber 4 are possible elsewhere. The arrangement of the temperature sensor 8 is chosen particularly expedient here. This is namely located directly on the pump unit 1 ', but is flowed around by the medium to be conveyed. The temperature sensor 8 is thus at a point at which high temperatures are particularly early when overloading the pump unit 1 ', but is nevertheless positioned so that the temperature of the medium to be conveyed is reliably detected.

Hier und vorzugsweise sind die erste vorgegebene Temperatur und die zweite vorgegebene Temperatur durch den Nutzer der Pumpe einstellbar. Die Pumpe kann damit auf einfache Weise an verschiedene zu fördernde Medien angepaßt werden. Alternativ ist es möglich, auch nur eine Temperatur einstellbar zu gestalten.Here and preferably, the first predetermined temperature and the second predetermined temperature are adjustable by the user of the pump. The pump can thus be easily adapted to different media to be conveyed. Alternatively, it is possible to make even a temperature adjustable.

Im gezeigten Ausführungsbeispiel weist die Steuerung 6 ein Mittel 9 zur Erfassung des Pumpbetriebes auf. Es wird also erfaßt, ob zu förderndes Medium die Pumpe verläßt, oder ob die Pumpe nur das in der Pumpe befindliche Medium bewegt. Die Steuerung 6 ist ferner so ausgeführt, daß sie das Pumpaggregat 1' bei Pumpbetrieb nach einer vorgegebenen Zeit abschaltet, sofern sie das Pumpaggregat 1' zuvor aufgrund Erreichens oder Unterschreitens der ersten vorgegebenen Temperatur eingeschaltet hat. Damit wird sichergestellt, daß die Pumpe nicht unnötig lange betrieben wird, obwohl ein Erreichen der zweiten vorgegebenen Temperatur nicht möglich ist. Gleichzeitig wird verhindert, daß die Pumpe bei gewünschtem Dauerbetrieb automatisch nach einer gewissen Zeit abschaltet. Das Mittel 9 zur Erfassung des Pumpbetriebs kann beispielsweise als Drucksensor oder als Durchflußmeßeinrichtung ausgeführt sein.In the exemplary embodiment shown, the controller 6 has a means 9 for detecting the pumping operation. It is thus detected whether medium to be pumped leaves the pump, or whether the pump moves only the medium in the pump. The controller 6 is further adapted to the pump unit 1 ' shuts off in a pumping operation after a predetermined time, if it has previously turned on the pump unit 1 'due to reaching or falling below the first predetermined temperature. This ensures that the pump is not operated unnecessarily long, although reaching the second predetermined temperature is not possible. At the same time it is prevented that the pump automatically shuts off after a certain time when desired continuous operation. The means 9 for detecting the pumping operation can be embodied, for example, as a pressure sensor or as a flowmeter.

Die Steuerung 6 weist hier und vorzugsweise einen Alarmgeber 10 auf. Der Alarmgeber 10 wird so gesteuert, daß er ein Alarmsignal abgibt, wenn die erste vorgegebene Temperatur erreicht oder unterschritten wird. Ferner kann ein Alarmsignal auch dann vorliegen, wenn die zweite vorgegebene Temperatur erreicht oder überschritten wird. Denkbar sind aber auch Ausführungen, bei denen ein Alarmsignal nur bei Erreichen oder Unterschreiten der ersten vorgegebenen Temperatur bzw. bei Erreichen oder Überschreiten der zweiten vorgegebenen Temperatur abgegeben wird.The controller 6 has here and preferably on an alarm generator 10. The alarm generator 10 is controlled so that it emits an alarm signal when the first predetermined temperature is reached or exceeded. Furthermore, an alarm signal can also be present when the second predetermined temperature is reached or exceeded. However, it is also conceivable embodiments in which an alarm signal is issued only when reaching or falling below the first predetermined temperature or when reaching or exceeding the second predetermined temperature.

Das Alarmsignal ist hier und vorzugsweise eine optische Anzeige und ein akustisches Signal. Das Alarmsignal ist bei der hier gezeigten Ausführungsform für die verschiedenen vorgegebenen Temperaturen unterschiedlich, so daß das Alarmsignal selbst bereits den Grund des Auslösens des Alarmsignals erkennen läßt.The alarm signal is here and preferably a visual indicator and an audible signal. The alarm signal is different in the embodiment shown here for the various predetermined temperatures, so that the alarm signal itself can already detect the cause of the triggering of the alarm signal.

Claims (10)

Pumpe mit einem Pumpengehäuse (1) und einem im Pumpengehäuse (1) angeordneten Pumpaggregat (1'),
wobei das Pumpengehäuse (1) einen Einlaß (2) und einen Auslaß (3) für das zu fördernde Medium aufweist und zwischen Einlaß (2) und Auslaß (3) ein Pumpraum (4) ausgebildet ist und
wobei eine Frostschutzeinrichtung (5) für das zu fördernde Medium vorgesehen ist,
dadurch gekennzeichnet,
daß die Frostschutzeinrichtung (5) eine Steuerung (6) mit zumindest einem Temperatursensor (7) aufweist und
daß die Steuerung (6) so ausgeführt ist, daß sie das Pumpaggregat (1') bei Erreichen oder Unterschreiten einer ersten vorgegebenen Temperatur einschaltet und nach einer vorgegebenen Zeit und/oder bei Erreichen oder Überschreiten einer zweiten vorgegebenen Temperatur, die höher ist als die erste vorgegebene Temperatur, ausschaltet.Pump having a pump housing (1) and a pump housing (1) arranged in the pump unit (1 '),
wherein the pump housing (1) has an inlet (2) and an outlet (3) for the medium to be conveyed and between the inlet (2) and outlet (3) a pump chamber (4) is formed and
wherein an antifreeze device (5) is provided for the medium to be conveyed,
characterized,
that the frost protection means (5) comprises a controller (6) with at least one temperature sensor (7) and
that the controller (6) is designed so that it turns on the pump unit (1 ') when reaching or falling below a first predetermined temperature and after a predetermined time and / or upon reaching or exceeding a second predetermined temperature, which is higher than the first predetermined temperature, turns off. Pumpe nach Anspruch 1, dadurch gekennzeichnet,
daß die erste vorgegebene Temperatur etwas höher ist als der Gefrierpunkt des zu fördernden Mediums,
wobei, falls das zu fördernde Medium Wasser ist,
die erste vorgegebene Temperatur vorzugsweise zwischen etwa 0,5 °C und etwa 5 °C, insbesondere bei etwa 2 °C, liegt
und/oder die zweite vorgegebene Temperatur vorzugsweise zwischen etwa 15 °C und etwa 60 °C, insbesondere zwischen etwa 20 °C und etwa 35 °C, liegt.Pump according to claim 1, characterized in that
that the first predetermined temperature is slightly higher than the freezing point of the medium to be conveyed,
wherein, if the medium to be conveyed is water,
the first predetermined temperature is preferably between about 0.5 ° C and about 5 ° C, especially at about 2 ° C
and / or the second predetermined temperature is preferably between about 15 ° C and about 60 ° C, more preferably between about 20 ° C and about 35 ° C. Pumpe nach einem der vorherigen Ansprüche, dadurch gekennzeichnet,
daß die Steuerung ein Mittel zur Erfassung des zu fördernden Mediums im Pumpraum (4), insbesondere einen Feuchtesensor, aufweist, und die Steuerung (6) so ausgelegt ist, daß bei einem entsprechenden Meßergebnis das Pumpaggregat (1') auch bei Erreichen oder Unterschreiten der ersten vorgegebenen Temperatur nicht eingeschaltet wird.Pump according to one of the preceding claims, characterized
in that the control system has a means for detecting the medium to be pumped in the pump chamber (4), in particular a humidity sensor, and the controller (6) is designed so that the pump unit (1 ') also reaches or falls below it when the measurement result is adequate first predetermined temperature is not turned on. Pumpe nach einem der vorherigen Ansprüche, dadurch gekennzeichnet,
daß die Steuerung (6) zwei Temperatursensoren (7, 8) aufweist und daß das Pumpaggregat (1') bei Erreichen oder Unterschreiten der ersten vorgegebenen Temperatur an dem ersten Temperatursensor (7) eingeschaltet wird und bei Erreichen oder Überschreiten der zweiten vorgegebenen Temperatur an dem zweiten Temperatursensor (8) ausgeschaltet wird.Pump according to one of the preceding claims, characterized
in that the control unit (6) has two temperature sensors (7, 8) and that the pump unit (1 ') is switched on when reaching or falling below the first predetermined temperature at the first temperature sensor (7) and at reaching or exceeding the second predetermined temperature at the second temperature sensor (8) is turned off. Pumpe nach einem der vorherigen Ansprüche, dadurch gekennzeichnet,
daß der Temperatursensor (7) / die Temperatursensoren (7, 8) als schaltende Temperatursensoren, insbesondere als Bimetallschalter, ausgeführt sind.Pump according to one of the preceding claims, characterized
that the temperature sensor (7) / temperature sensors (7, 8) are designed as switching temperature sensors, in particular as bimetallic switches. Pumpe nach einem der vorherigen Ansprüche, dadurch gekennzeichnet,
daß der Temperaturensor (7) / die Temperatursensoren (7, 8) im oder am Pumpraum (4) angeordnet ist / sind.Pump according to one of the preceding claims, characterized
that the temperature sensor (7) / temperature sensors (7, 8) in or on the pumping chamber (4) is / are arranged. Pumpe nach einem der vorherigen Ansprüche, dadurch gekennzeichnet,
daß die erste vorgegebene Temperatur und/oder die zweite vorgegebene Temperatur einstellbar ist.Pump according to one of the preceding claims, characterized
that the first predetermined temperature and / or the second predetermined temperature is adjustable. Pumpe nach einem der vorherigen Ansprüche, dadurch gekennzeichnet,
daß die Steuerung (6) ein Mittel (9) zur Erfassung eines Pumpbetriebes aufweist und daß die Steuerung (6) so ausgeführt ist, daß sie das Pumpaggregat (1') bei Pumpbetrieb nach einer vorgegebenen Zeit abschaltet, sofern sie das Pumpaggregat (1') zuvor aufgrund Erreichens oder Unterschreitens der ersten vorgegebenen Temperatur eingeschaltet hat.Pump according to one of the preceding claims, characterized
in that the controller (6) has a means (9) for detecting a pumping operation and that the controller (6) is designed to switch off the pumping unit (1 ') during a pumping operation after a predetermined time, provided that the pumping unit (1'; ) has previously turned on due to reaching or falling below the first predetermined temperature. Pumpe nach Anspruch 8, dadurch gekennzeichnet,
daß das Mittel (9) zur Erfassung des Pumpbetriebs als Drucksensor oder als Durchflußmeßeinrichtung ausgeführt ist.Pump according to claim 8, characterized in that
in that the means (9) for detecting the pumping operation is designed as a pressure sensor or as a flow measuring device. Pumpe nach einem der vorherigen Ansprüche, dadurch gekennzeichnet,
daß die Steuerung (6) einen Alarmgeber (10) aufweist und daß die Steuerung (6) so ausgeführt ist, daß der Alarmgeber (10) ein Alarmsignal abgibt, wenn die erste vorgegebene Temperatur erreicht oder unterschritten wird und/oder wenn die zweite vorgegebene Temperatur erreicht oder überschritten wird.Pump according to one of the preceding claims, characterized
in that the controller (6) has an alarm transmitter (10) and that the controller (6) is designed so that the alarm transmitter (10) emits an alarm signal when the first predetermined temperature is reached or undershot and / or if the second predetermined temperature is reached or exceeded.
EP05024983A 2004-12-14 2005-11-16 Pump having protection means against freezing Active EP1672216B1 (en)

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DE102004060418A DE102004060418A1 (en) 2004-12-14 2004-12-14 Pump with frost protection device

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EP1672216B1 EP1672216B1 (en) 2007-05-02

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CN112343808A (en) * 2020-11-06 2021-02-09 荏原机械（中国）有限公司 Outdoor double-water-pump anti-freezing control system

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CN112343808A (en) * 2020-11-06 2021-02-09 荏原机械（中国）有限公司 Outdoor double-water-pump anti-freezing control system
CN112343808B (en) * 2020-11-06 2022-03-18 荏原机械（中国）有限公司 Outdoor double-water-pump anti-freezing control system

Also Published As

Publication number Publication date
EP1672216B1 (en) 2007-05-02
ES2284119T3 (en) 2007-11-01
DE102004060418A1 (en) 2006-07-06
ATE361428T1 (en) 2007-05-15
DE502005000659D1 (en) 2007-06-14

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