EP1672216B1 - Pompe ayant des moyens de protection contre la gelée - Google Patents

Pompe ayant des moyens de protection contre la gelée Download PDF

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Publication number
EP1672216B1
EP1672216B1 EP05024983A EP05024983A EP1672216B1 EP 1672216 B1 EP1672216 B1 EP 1672216B1 EP 05024983 A EP05024983 A EP 05024983A EP 05024983 A EP05024983 A EP 05024983A EP 1672216 B1 EP1672216 B1 EP 1672216B1
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EP
European Patent Office
Prior art keywords
pump
temperature
preset temperature
pumping
reached
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.)
Active
Application number
EP05024983A
Other languages
German (de)
English (en)
Other versions
EP1672216A1 (fr
Inventor
Hans-Joachim Schaller
Bernhard Niemann
Konrad Westermann
Achim Thäsler
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.)
Metabowerke GmbH and Co
Original Assignee
Metabowerke GmbH and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metabowerke GmbH and Co filed Critical Metabowerke GmbH and Co
Publication of EP1672216A1 publication Critical patent/EP1672216A1/fr
Application granted granted Critical
Publication of EP1672216B1 publication Critical patent/EP1672216B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 known pump with antifreeze device for the medium to be conveyed, from which the invention proceeds provides that the antifreeze device has a control with at least one temperature sensor, the pump unit when reaching or falling below a first predetermined Temperature turns on. 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.
  • 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 of optimizing the known pump with respect to the antifreeze device.
  • the first predetermined temperature is the only criterion for the activation of the antifreeze device.
  • the medium detection in the pump chamber itself enters the control. As a result, an unnecessary start of the pump can be avoided.
  • 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. Is switched off so only when the pump unit is running, but no or 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 serves 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 disposed 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 must 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 moisture 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 depending on from 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 the medium to be pumped leaves the pump, or whether the pump moves only the medium in the pump.
  • the controller 6 is further designed so that it turns off the pump unit 1 'in pumping operation after a predetermined time, if it has the pump unit 1' previously turned on 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Fertilizing (AREA)
  • Defrosting Systems (AREA)

Claims (10)

  1. Pompe comprenant un carter de pompe (1) et un ensemble de pompage (1') disposé dans le carter de pompe (1),
    le carter de pompe (1) présentant une entrée (2) et une sortie (3) pour le fluide à transporter et un espace de pompage (4) étant réalisé entre l'entrée (2) et la sortie (3) et
    un dispositif antigel (5) étant prévu pour le fluide à transporter,
    le dispositif antigel (5) présentant une commande (6) avec au moins un capteur de température (7) et la commande (6) étant réalisée de telle sorte qu'elle enclenche l'ensemble de pompage (1') en cas d'atteinte ou de sous-dépassement d'une première température prédéfinie et le déconnecte après un temps prédéfini et/ou en cas d'atteinte ou de dépassement d'une seconde température prédéfinie qui est supérieure à la première température prédéfinie,
    caractérisée en ce que
    la commande (6) présente un moyen pour la détection du fluide à transporter dans l'espace de pompage (4) et est conçue de telle sorte que l'ensemble de pompage (1') n'est pas enclenché même en cas d'atteinte ou de sous-dépassement de la première température prédéfinie, si aucun fluide à transporter ne devait être mesuré, ou si une sécheresse suffisante devait l'être, dans l'espace de pompage (4) par le moyen destiné à détecter le fluide à transporter.
  2. Pompe selon la revendication 1, caractérisée en ce que
    le moyen pour détecter le fluide à transporter dans l'espace de pompage (4) est un capteur d'humidité et en ce que l'ensemble de pompage (1') n'est pas enclenché même en cas d'atteinte ou de sous-dépassement de la première température prédéfinie, dans le cas où l'espace de pompage (4) ne contient aucun fluide à transporter ou s'il a été constaté suffisamment sec à la suite de la mesure du capteur d'humidité.
  3. Pompe selon la revendication 1 ou 2, caractérisée en ce que
    la première température prédéfinie est légèrement supérieure au point de congélation du fluide à transporter,
    sachant que, si le fluide à transporter est de l'eau, la première température prédéfinie se situe de préférence entre environ 0,5°C et environ 5°C, en particulier aux environs de 2°C,
    et/ou la seconde température prédéfinie se situe de préférence entre environ 15°C et environ 60°C, en particulier entre 20°C et environ 35°C.
  4. Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que
    la commande (6) présente deux capteurs de température (7, 8) et en ce que l'ensemble de pompage (1') est enclenché en cas d'atteinte ou de sous-dépassement de la première température prédéfinie sur le premier capteur de température (7) et en ce qu'il est déconnecté en cas d'atteinte ou de dépassement de la seconde température prédéfinie sur le second capteur de température (8).
  5. Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que le capteur de température (7) / les capteurs de température (7, 8) sont conçus comme des capteurs de température de commutation, en particulier sous la forme d'interrupteurs bimétalliques.
  6. Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que le capteur de température (7) / les capteurs de température (7, 8) est/sont disposé(s) dans ou sur l'espace de pompage (4).
  7. Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que la première température prédéfinie et/ou la seconde température prédéfinie est réglable.
  8. Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que la commande (6) présente un moyen (9) pour la détection d'un fonctionnement de pompe et en ce que la commande (6) est réalisée de telle sorte qu'elle déconnecte l'ensemble de pompage (1') en cas de fonctionnement de pompe après un temps prédéfini, dans la mesure où elle a enclenché l'ensemble de pompage (1') auparavant à la suite de l'atteinte ou du sous-dépassement de la première température prédéfinie.
  9. Pompe selon la revendication 8, caractérisée en ce que le moyen (9) pour la détection du fonctionnement de pompe est réalisé sous la forme d'un capteur de pression ou d'un dispositif de mesure de débit.
  10. Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que la commande (6) présente un générateur d'alarme (10) et en ce que la commande (6) est réalisée de telle sorte que le générateur d'alarme (10) émet un signal d'alarme lorsque la première température prédéfinie est atteinte ou sous-dépassée et/ou lorsque la seconde température prédéfinie est atteinte ou dépassée.
EP05024983A 2004-12-14 2005-11-16 Pompe ayant des moyens de protection contre la gelée Active EP1672216B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004060418A DE102004060418A1 (de) 2004-12-14 2004-12-14 Pumpe mit Frostschutzeinrichtung

Publications (2)

Publication Number Publication Date
EP1672216A1 EP1672216A1 (fr) 2006-06-21
EP1672216B1 true EP1672216B1 (fr) 2007-05-02

Family

ID=35927000

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05024983A Active EP1672216B1 (fr) 2004-12-14 2005-11-16 Pompe ayant des moyens de protection contre la gelée

Country Status (4)

Country Link
EP (1) EP1672216B1 (fr)
AT (1) ATE361428T1 (fr)
DE (2) DE102004060418A1 (fr)
ES (1) ES2284119T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013124038A1 (fr) 2012-02-24 2013-08-29 Nilfisk-Advance A/S Procédé permettant de faire fonctionner un nettoyeur haute pression selon plusieurs modes de fonctionnement

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Publication number Priority date Publication date Assignee Title
US8308450B2 (en) * 2009-03-05 2012-11-13 Cummins Intellectual Properties, Inc. High pressure fuel pump with parallel cooling fuel flow
US20110002791A1 (en) * 2009-04-07 2011-01-06 Itt Manufacturing Enterprises, Inc. Pump System for Removing Water from Pool Covers and Sumps
CN112343808B (zh) * 2020-11-06 2022-03-18 荏原机械（中国）有限公司 一种户外双水泵防冻控制***

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013124038A1 (fr) 2012-02-24 2013-08-29 Nilfisk-Advance A/S Procédé permettant de faire fonctionner un nettoyeur haute pression selon plusieurs modes de fonctionnement

Also Published As

Publication number Publication date
ES2284119T3 (es) 2007-11-01
ATE361428T1 (de) 2007-05-15
DE502005000659D1 (de) 2007-06-14
EP1672216A1 (fr) 2006-06-21
DE102004060418A1 (de) 2006-07-06

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