EP1158251B1 - Method for regulating a water heating installation - Google Patents

Method for regulating a water heating installation Download PDF

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Publication number
EP1158251B1
EP1158251B1 EP01250169A EP01250169A EP1158251B1 EP 1158251 B1 EP1158251 B1 EP 1158251B1 EP 01250169 A EP01250169 A EP 01250169A EP 01250169 A EP01250169 A EP 01250169A EP 1158251 B1 EP1158251 B1 EP 1158251B1
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EP
European Patent Office
Prior art keywords
storage
temperature sensor
temperature
water
controller
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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.)
Expired - Lifetime
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EP01250169A
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German (de)
French (fr)
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EP1158251A3 (en
EP1158251A2 (en
Inventor
Carsten Auf Dem Kampe
Christian Haack
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Vaillant GmbH
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Vaillant GmbH
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Priority to AT01250169T priority Critical patent/ATE403114T1/en
Publication of EP1158251A2 publication Critical patent/EP1158251A2/en
Publication of EP1158251A3 publication Critical patent/EP1158251A3/en
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Publication of EP1158251B1 publication Critical patent/EP1158251B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water

Definitions

  • the invention relates to a method for controlling a water heater according to the preamble of claim 1.
  • the time at which charging of the stratified charge starts or is heated up is determined by a drop in the temperature of the content of the store below a predetermined temperature.
  • the aim of the invention is to propose a method of the type mentioned, which can be carried out in practice with only a small amount of equipment.
  • the memory will be cooled at least to some extent during operation for each of the selected switch-on times u. zw.
  • a reheating would also be done with the use of a corresponding sensor.
  • Another object of the invention is to propose a device for carrying out the method.
  • the temperature sensor only serves as a switch-off sensor, which stops charging when a certain temperature is exceeded.
  • the water heater has a memory 1 operated as a memory 1, which is provided with an all-round insulation 25.
  • a cold water outlet 4 leads away, which leads to a heat exchanger 6. Furthermore, a cold water inlet 2 opens into the lowest area of the memory 1. In the cold water outlet 4, a pump 5 is provided, which ensures a corresponding circulation of the water.
  • a hot water inlet 7 in the uppermost region 27 of the memory 1. From this top area performs a service water pipe 3 away.
  • a temperature sensor 12 is arranged, which detects the temperature of the incoming hot water when charging the memory 1.
  • a temperature sensor 14 is arranged even in the lowermost region of the memory 1.
  • the temperature sensor 14 is connected via a signal line 24 to a controller 10, which also has a switching timer 11. This sensor 14 delivers when exceeding a predetermined temperature, a signal indicating the full charge of the memory and ends it by means of the controller.
  • the temperature sensor 12 is also connected via a signal line 22 to the controller 10. This controls via a control line 21, a motor of the pump 5 and the application of the primary branch 6 'of the heat exchanger 6 via control devices, not shown, of a water heater.
  • controller 10 If the controller 10, or its switching timer 11, supplies a signal for starting a charge, then the controller 10 sends a signal for starting the pump 5 via the control line 21, at the same time acting on the heat exchanger 6, takes place or its primary branch 6 'is acted upon.
  • cool water is withdrawn from the lowermost region 26 of the storage 1 and conveyed to the heat exchanger 6 and heated there.
  • the warm water flows into the uppermost region 27 of the storage 1. If the temperature reaches a certain value in the region of the sensor 14, this emits a signal, and the controller 10 stops the charging of the memory 1, the pump 5 is stopped and the application of the primary branch 6 'of the heat exchanger 6 is terminated.
  • an intermediate heating can be controlled with this. This is triggered when the temperature in the central area of the memory 1 drops below a certain temperature detected by the additional sensor in a period of time normally closed. In this case, an intermediate heating by the controller 10 is started by the corresponding signal and the pump 5 and the application of the primary branch 6 'of the heat exchanger 6 is started.
  • the delivery rate of the pump 5 can be carried out by the controller 10 in such a way that it is chosen so that the temperature of the effluent hot water is sufficiently high.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Cookers (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

The method involves using a layered storage device and switching off the charging process when a defined water temperature is reached. The charging process is started at one or more fixed time points. The method involves using a layered storage device and switching off the charging process when a defined water temperature is reached. The charging process is started at one or more fixed time points. A device for controlling a water heater has a layered storage device (1) with a cold water tapping (4) at its lowest point connected via a pump (5) to a heat exchanger (6) from which a hot water line (7) leads to the top of the storage device, a consumable water line (3), a cold water feed line (2) connected to the bottom of the storage device and a water temperature sensor (12) connected to a controller (10) with a timer (11). The temperature sensor is mounted in the hot water feed line. Independent claims are also included for the following: an arrangement for implementing the method.

Description

Die Erfindung bezieht sich auf ein Verfahren zur Steuerung einer Wasserheizeinrichtung gemäß dem Oberbegriff des Anspruches 1.The invention relates to a method for controlling a water heater according to the preamble of claim 1.

Bei bekannten derartigen Verfahren wird der Zeitpunkt des Beginns einer Aufladung bzw. Aufheizung des Schichtenspeichers durch ein Absinken der Temperatur des Inhaltes des Speichers unter eine vorgegebene Temperatur bestimmt.In known methods of this type, the time at which charging of the stratified charge starts or is heated up is determined by a drop in the temperature of the content of the store below a predetermined temperature.

Um ein solches Verfahren durchführen zu können, ist ein erheblicher apparativer Aufwand erforderlich. So sind hierfür entweder drei Temperaturfühler im Speicher erforderlich oder zwei Temperaturfühler und ein Thermostatventil.In order to carry out such a procedure, a considerable amount of equipment is required. For this purpose, either three temperature sensors in the memory are required or two temperature sensors and a thermostatic valve.

Gemäß der DE 198 55 442 ist auch ein Verfahren der eingangs erwähnten Art bekannt, bei dem der Start einer Aufladung zwar von einem Absinken der Temperatur des Inhaltes des Speichers abhängig ist, aber nur innerhalb eines vorgegebenen Zeitfensters, das mit der Schaltzeituhr festgelegt werden kann, möglich ist.According to the DE 198 55 442 is also a method of the type mentioned above, in which the start of a charge, although dependent on a decrease in the temperature of the content of the memory, but only within a predetermined time window, which can be set with the switching timer is possible.

Auch bei diesem Verfahren ist jedoch ein entsprechend großer apparativer Aufwand erforderlich.However, in this method, a correspondingly large amount of equipment is required.

Ziel der Erfindung ist es, ein Verfahren der eingangs erwähnten Art vorzuschlagen, das sich in der Praxis mit einem nur geringen apparativen Aufwand durchführen läßt.The aim of the invention is to propose a method of the type mentioned, which can be carried out in practice with only a small amount of equipment.

Erfindungsgemäß wird dies bei einem Verfahren der eingangs erwähnten Art durch die kennzeichnenden Merkmale des Anspruches 1 erreicht.According to the invention this is achieved in a method of the type mentioned by the characterizing features of claim 1.

Durch die vorgeschlagenen Maßnahmen ist es möglich, mit einem einzigen Temperaturfühler das Auslangen zu finden, da letztlich lediglich ein Überschreiten der Temperatur an beliebiger Stelle eines über den Schichtenspeicher geführten Wasserkreislaufes erfaßt zu werden braucht.The proposed measures, it is possible to find the Auslangen with a single temperature sensor, since ultimately only an exceeding of the temperature needs to be detected at any point of a guided over the layer memory water cycle.

Üblicherweise reichen z.B. für einen Vier-Personenhaushalt zwei bis drei Aufheizungen eines Speichers mit z.B. 120 Liter Inhalt aus, um den Warmwasserbedarf eines Tages zu decken. Es können daher drei Zeitpunkte im Laufe eines Tages festgelegt werden, zu denen eine Aufheizung gestartet wird. Dies bedeutet, daß zu jedem dieser Zeitpunkte ein Wärmeerzeuger, z.B. ein Wärmetauscher und die Pumpe gestartet werden. Die Abschaltung der Aufladung erfolgt dabei in jedem Fall, sobald ein bestimmter Temperaturwert an einer bestimmten Stelle des über den Speicher geführten Wasserkreislaufes überschritten wird.Usually, e.g. for a four-person household two to three heats of a memory with e.g. 120 liters content to cover the hot water needs of a day. Therefore, three times can be set during the course of a day at which heating is started. This means that at each of these times a heat generator, e.g. a heat exchanger and the pump are started. The shutdown of the charge takes place in each case, as soon as a certain temperature value is exceeded at a certain point of the guided over the memory water cycle.

In der Regel wird im Betrieb zu jedem der gewählten Einschaltzeiten der Speicher zumindest in einem gewissen Ausmaß abgekühlt sein u. zw. sowohl durch Abstrahlungsverluste, als auch durch Zapfungen, so daß eine Nachheizung auch bei Einsatz eines entsprechenden Fühlers erfolgt wäre.In general, the memory will be cooled at least to some extent during operation for each of the selected switch-on times u. zw. By both radiation losses, as well as by taps, so that a reheating would also be done with the use of a corresponding sensor.

Sollte der Speicher dennoch einmal zu Beginn einer Aufladung ausreichend aufgeheizt sein, so wird dies durch Überschreiten der vorgesehenen Temperatur erfaßt und die Aufheizung beendet.Should the memory nevertheless be sufficiently heated once at the beginning of a charge, this is detected by exceeding the intended temperature and the heating ends.

Ein weiteres Ziel der Erfindung ist es, eine Einrichtung zur Durchführung des Verfahrens vorzuschlagen.Another object of the invention is to propose a device for carrying out the method.

Ausgehend von Einrichtungen gemäß dem Oberbegriff des Anspruches 2, werden die kennzeichnenden Merkmale des Anspruches 2 vorgeschlagen.Starting from devices according to the preamble of claim 2, the characterizing features of claim 2 are proposed.

Weiter werden auch, ausgehend von einer Einrichtung gemäß dem Oberbegriff des Anspruches 3, die kennzeichnenden Merkmale des Anspruches 3 vorgeschlagen.Further, starting from a device according to the preamble of claim 3, the characterizing features of claim 3 are proposed.

In beiden Fällen ergibt sich eine in konstruktiver Hinsicht sehr einfache Lösung, mit der das erfindungsgemäße Verfahren sehr einfach durchgeführt werden kann. In beiden Fällen dient der Temperaturfühler lediglich als Ausschaltfühler, der bei Überschreiten einer bestimmten Temperatur die Aufladung beendet.In both cases, a constructively very simple solution with which the inventive method can be carried out very easily. In both cases, the temperature sensor only serves as a switch-off sensor, which stops charging when a certain temperature is exceeded.

Durch die Merkmale des Anspruches 4 ergibt sich der Vorteil, daß die Erreichung einer vollen Aufladung des Schichtenspeichers exakt erfaßt werden kann.Due to the features of claim 4, there is the advantage that the achievement of a full charge of the stratified storage can be accurately detected.

Durch die Merkmale des Anspruches 5 ergibt sich der Vorteil, daß neben einer Aufheizung zu einem festgelegten Zeitpunkt auch eine Zwischenaufheizung bei einer zu weitgehenden Entladung aufgrund von einer ungewöhnlich starken Zapfung möglich ist. Eine solche wird ausgelöst, wenn die Temperatur im mittleren Bereich des Speichers unter einen vorbestimmten Wert sinkt. Dadurch wird ein sehr hoher Komfort für den Benutzer sichergestellt.Due to the features of claim 5, there is the advantage that in addition to a heating at a predetermined time and a Zwischenaufheizung in too extensive a discharge due to an unusually strong tapping is possible. Such is triggered when the temperature in the central region of the memory drops below a predetermined value. This ensures a very high level of comfort for the user.

Die Erfindung wird nun anhand der Zeichnung näher erläutert, die schematisch eine erfindungsgemäße Warmwasserheizeinrichtung zeigt.The invention will now be explained in more detail with reference to the drawing, which shows schematically a hot water heater according to the invention.

Die Wasserheizeinrichtung weist einen als Schichtenspeicher betriebenen Speicher 1 auf, der mit einer allseitigen Isolierung 25 versehen ist.The water heater has a memory 1 operated as a memory 1, which is provided with an all-round insulation 25.

Aus dem untersten Bereich 26 des Speichers 1 führt ein Kaltwasserabzug 4 weg, der zu einem Wärmetauscher 6 führt. Weiters mündet ein Kaltwasserzulauf 2 in den untersten Bereich des Speichers 1. In dem Kaltwasserabzug 4 ist eine Pumpe 5 vorgesehen, die für eine entsprechende Umwälzung des Wassers sorgt.From the lowermost region 26 of the accumulator 1, a cold water outlet 4 leads away, which leads to a heat exchanger 6. Furthermore, a cold water inlet 2 opens into the lowest area of the memory 1. In the cold water outlet 4, a pump 5 is provided, which ensures a corresponding circulation of the water.

Von dem Wärmetauscher 6 weg führt ein Warmwasserzulauf 7 in den obersten Bereich 27 des Speichers 1. Aus diesem obersten Bereich führt eine Brauchwasserleitung 3 weg. In dem Warmwasserzulauf 7 ist ein Temperaturfühler 12 angeordnet, der bei einer Aufladung des Speichers 1 die Temperatur des zulaufenden Warmwassers erfaßt.From the heat exchanger 6 away leads a hot water inlet 7 in the uppermost region 27 of the memory 1. From this top area performs a service water pipe 3 away. In the hot water inlet 7, a temperature sensor 12 is arranged, which detects the temperature of the incoming hot water when charging the memory 1.

Weiter ist noch im untersten Bereich des Speichers 1 ein Temperaturfühler 14 angeordnet.Furthermore, a temperature sensor 14 is arranged even in the lowermost region of the memory 1.

Der Temperaturfühler 14 ist über eine Signalleitung 24 mit einer Steuerung 10 verbunden, die auch eine Schaltzeituhr 11 aufweist. Dieser Fühler 14 liefert bei Überschreitung einer vorgegebenen Temperatur ein Signal, das die vollständige Aufladung des Speichers anzeigt und diese mittels der Steuerung beendet.The temperature sensor 14 is connected via a signal line 24 to a controller 10, which also has a switching timer 11. This sensor 14 delivers when exceeding a predetermined temperature, a signal indicating the full charge of the memory and ends it by means of the controller.

Der Temperaturfühler 12 ist ebenfalls über eine Signalleitung 22 mit der Steuerung 10 verbunden. Diese steuert über eine Steuerleitung 21 einen Motor der Pumpe 5 und die Beaufschlagung des Primärzweiges 6' des Wärmetauschers 6 über nicht dargestellte Steuereinrichtungen eines Wasserheizers.The temperature sensor 12 is also connected via a signal line 22 to the controller 10. This controls via a control line 21, a motor of the pump 5 and the application of the primary branch 6 'of the heat exchanger 6 via control devices, not shown, of a water heater.

Liefert die Steuerung 10, bzw. deren Schaltzeituhr 11 ein Signal zum Start einer Aufladung, so gibt die Steuerung 10 ein Signal zum Start der Pumpe 5 über die Steuerleitung 21 ab, wobei gleichzeitig eine Beaufschlagung des Wärmetauschers 6, stattfindet bzw. dessen Primärzweig 6' beaufschlagt wird.If the controller 10, or its switching timer 11, supplies a signal for starting a charge, then the controller 10 sends a signal for starting the pump 5 via the control line 21, at the same time acting on the heat exchanger 6, takes place or its primary branch 6 'is acted upon.

Dabei wird kühles Wasser aus dem untersten Bereich 26 des Speichers 1 abgezogen und zum Wärmetauscher 6 gefördert und dort aufgeheizt. Das warme Wasser strömt dabei in den obersten Bereich 27 des Speichers 1 ein. Erreicht die Temperatur im Bereich des Fühlers 14 einen bestimmten Wert, so gibt dieser ein Signal ab, und die Steuerung 10 beendet die Aufladung des Speichers 1, wobei die Pumpe 5 stillgesetzt und die Beaufschlagung des Primärzweiges 6' des Wärmetauschers 6 beendet wird.In this case, cool water is withdrawn from the lowermost region 26 of the storage 1 and conveyed to the heat exchanger 6 and heated there. The warm water flows into the uppermost region 27 of the storage 1. If the temperature reaches a certain value in the region of the sensor 14, this emits a signal, and the controller 10 stops the charging of the memory 1, the pump 5 is stopped and the application of the primary branch 6 'of the heat exchanger 6 is terminated.

Wird Brauchwasser über die Brauchwasserleitung 3 gezapft, so strömt kaltes Wasser über den Kaltwasserzulauf 2 und in den untersten Bereich 26 des Speichers 1 nach.If service water is tapped via the service water line 3, then cold water flows over the cold water inlet 2 and into the lowermost region 26 of the storage 1.

Falls in einem mittleren Bereich 28 des Speichers 1 ein nicht dargestellter weiterer Temperaturfühler vorgesehen ist, so kann mit diesem eine Zwischenaufheizung gesteuert werden. Diese wird ausgelöst, wenn in einem für eine normale Aufladung gesperrten Zeitraum die Temperatur im mittleren Bereich des Speichers 1 unter eine bestimmte Temperatur, die durch den zusätzlichen Fühler erfaßt wird, sinkt. Dabei wird durch dessen entsprechendes Signal eine Zwischenaufheizung durch die Steuerung 10 gestartet und die Pumpe 5 und die Beaufschlagung des Primärzweiges 6' des Wärmetauschers 6 gestartet.If an unillustrated further temperature sensor is provided in a central region 28 of the memory 1, an intermediate heating can be controlled with this. This is triggered when the temperature in the central area of the memory 1 drops below a certain temperature detected by the additional sensor in a period of time normally closed. In this case, an intermediate heating by the controller 10 is started by the corresponding signal and the pump 5 and the application of the primary branch 6 'of the heat exchanger 6 is started.

Die Förderleistung der Pumpe 5 kann dabei durch die Steuerung 10 in der Weise erfolgen, daß diese so gewählt wird, daß die Temperatur des abströmenden Brauchwassers ausreichend hoch ist.The delivery rate of the pump 5 can be carried out by the controller 10 in such a way that it is chosen so that the temperature of the effluent hot water is sufficiently high.

Die Beendigung einer solchen Zwischenaufheizung, durch die zu allen Zeiten ein hoher Warmwasserkomfort sichergestellt ist, kann in Abhängigkeit von der Zapfung von Brauchwasser erfolgen.The completion of such Zwischenaufheizung, through which at all times a high degree of hot water comfort is ensured, can be done depending on the tap of hot water.

Claims (6)

  1. A process for controlling a water heating system comprising a stratified storage (1) in which the recharging process is switched off when a certain temperature of the water has been reached, characterised in that a recharging process is started at one or several points of time, irrespective of the temperature of the stratified storage (1).
  2. An arrangement for implementing the process according to Claim 1, comprising a stratified storage (1), a cold water discharge line (4) leading away from the lowermost portion of the said storage (1), such discharge line (4) being connected via a pump (5) with a heat exchanger (6) from which a hot water supply line (7) leads to the uppermost portion of the storage (1), further comprising a service water line (3), a cold water supply line (2) connected with the lowermost portion of the storage (1), and a temperature sensor (12) sensing the temperature of the water, such temperature sensor (12) being connected with a controller (10) comprising a time switch (11), characterised in that the temperature sensor is arranged in the hot water supply line.
  3. An arrangement for implementing the process according to Claim 1, comprising a stratified storage (1), a cold water discharge line (4) leading away from the lowermost portion of the said storage (1), such discharge line (4) being connected via a pump (5) with a heat exchanger (6) from which a hot water supply line (7) leads to the uppermost portion of the storage (1), further comprising a service water line (3), a cold water supply line (2) connected with the lowermost portion of the storage (1), and a temperature sensor (12) sensing the temperature of the water, such temperature sensor (12) being connected with a controller (10) comprising a time switch (11), characterised in that the temperature sensor is arranged in the cold water discharge line (4).
  4. An arrangement according the Claim 2 or 3, characterised in that a further temperature sensor (14) is arranged in the lowermost portion of the storage (1), which sensor (14) is connected with the controller (10).
  5. An arrangement according to any of the Claims 2 to 4, characterised in that the controller (10) comprises two time switches (11), one of which being provided for setting the point of time for fully recharging the storage (1) and the other one for setting the point of time for partially recharging the storage (1).
  6. An arrangement according to any of the Claims 2 to 4 characterised in that the controller (10) comprises a single time switch (11) which is provided for setting the points of time for fully recharging and for partially recharging the storage (1).
EP01250169A 2000-05-22 2001-05-16 Method for regulating a water heating installation Expired - Lifetime EP1158251B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT01250169T ATE403114T1 (en) 2000-05-22 2001-05-16 METHOD FOR CONTROLLING A WATER HEATING DEVICE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT8822000 2000-05-22
AT8822000 2000-12-01

Publications (3)

Publication Number Publication Date
EP1158251A2 EP1158251A2 (en) 2001-11-28
EP1158251A3 EP1158251A3 (en) 2003-05-28
EP1158251B1 true EP1158251B1 (en) 2008-07-30

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EP01250169A Expired - Lifetime EP1158251B1 (en) 2000-05-22 2001-05-16 Method for regulating a water heating installation

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EP (1) EP1158251B1 (en)
AT (1) ATE403114T1 (en)
DE (2) DE50114163D1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1172616B1 (en) * 2000-07-10 2005-06-15 Vaillant GmbH Method of operating a stratified accumulator
DE10201750A1 (en) * 2002-01-18 2003-08-07 Bosch Gmbh Robert Hot water circulation system
DE102007033564B3 (en) * 2007-07-19 2009-01-02 Robert Bosch Gmbh Method for operating a stratified charge storage and domestic hot water system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3138803C2 (en) * 1981-09-30 1984-08-09 Buderus Ag, 6330 Wetzlar Heating control of an upright domestic hot water storage tank and device for implementing the control
DE3524016A1 (en) * 1984-07-11 1986-01-16 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Hot-water accumulator with indirect heating
AT405465B (en) * 1996-01-15 1999-08-25 Vaillant Gmbh WATER HEATING SYSTEM
AT406084B (en) * 1996-02-19 2000-02-25 Vaillant Gmbh WATER HEATING SYSTEM
DE19710772A1 (en) * 1997-03-17 1998-09-24 Bosch Gmbh Robert Control device for domestic water heating
AT406195B (en) * 1997-12-01 2000-03-27 Vaillant Gmbh STORAGE ARRANGEMENT

Also Published As

Publication number Publication date
EP1158251A3 (en) 2003-05-28
DE50114163D1 (en) 2008-09-11
EP1158251A2 (en) 2001-11-28
ATE403114T1 (en) 2008-08-15
DE10124919A1 (en) 2001-11-29

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