EP2957837A1 - Heating system and method for operating a heating system - Google Patents

Heating system and method for operating a heating system Download PDF

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Publication number
EP2957837A1
EP2957837A1 EP15167325.8A EP15167325A EP2957837A1 EP 2957837 A1 EP2957837 A1 EP 2957837A1 EP 15167325 A EP15167325 A EP 15167325A EP 2957837 A1 EP2957837 A1 EP 2957837A1
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EP
European Patent Office
Prior art keywords
pressure
valve
pressure difference
heating system
pressure sensor
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Granted
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EP15167325.8A
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German (de)
French (fr)
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EP2957837B1 (en
Inventor
Mark Paske Te
Jan Elsen Ten
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP2957837A1 publication Critical patent/EP2957837A1/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
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • 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
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • F24D19/1024—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a multiple way valve
    • 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
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • F24D19/1036—Having differential pressure measurement facilities
    • 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
    • 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
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/02—Fluid distribution means
    • F24D2220/0242—Multiple way valves
    • 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
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/04—Sensors
    • F24D2220/046—Pressure sensors
    • 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
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/08—Storage tanks

Definitions

  • the invention relates to a heating system comprising at least one heating circuit, a circulating fluid in the heating circuit, at least one heat generator, a first valve and a second valve. Furthermore, the invention relates to a method for operating the heating system.
  • a heating system with a combination heater also includes an expansion tank, which ensures a constant pressure in the heating system. To be able to produce a pressure equalization to the expansion tank at any time, often a bypass circuit between the flow and return of the heater is necessary.
  • Such a bypass circuit has the disadvantage that the heating system loses heating power.
  • the heating system comprises at least one heating circuit and a circulating fluid in this. Furthermore, the heating system comprises at least one heat generator, a first and a second valve. The heating system is characterized by the fact that between the first and second valve, a pressure sensor is arranged. The pressure sensor detects pressure variations to which the heating system can react or be adjusted.
  • a fluid is to be understood as a medium which can absorb and release heat. These may be, inter alia, gaseous, liquid or even solid substances.
  • the first and second valves in the heating circuit have at least one closing and opening function. If a valve closes, the fluid can not pass through it. If a valve is open, the fluid can pass through the valve.
  • the valve may also be partially opened or closed.
  • the valve may be, for example, a three-way valve or a thermostatic valve or the like.
  • the pressure sensor determines an initial pressure and a current pressure.
  • An initial pressure is the pressure that is measured by the pressure sensor at a predeterminable start time.
  • a current pressure is the pressure measured after this starting time at a predeterminable later time. From the measurement results, a pressure difference can be determined, which is defined as the amount of the difference between the instantaneous pressure and the initial pressure.
  • the first valve and / or the second valve may be closed or opened in the measurement of the initial or instantaneous pressure.
  • the first valve opens when the pressure difference reaches or exceeds a predefinable maximum pressure difference.
  • the amount of the pressure difference is considered.
  • a maximum pressure difference is the amount of pressure difference up to which the safe operation of the heating system is guaranteed. If the maximum pressure difference is reached or exceeded, the first or second valve blocks.
  • Analog is a minimum pressure to understand. If the maximum pressure difference is reached or exceeded or the minimum pressure is reached or undershot, appropriate steps for pressure equalization must be initiated.
  • the instantaneous pressure can be compared with the predeterminable minimum pressure. If the current pressure falls below the presettable minimum pressure, the valve opens. This ensures safe operation of the heating system under optimized conditions.
  • both components, the first valve and the pressure sensor may be connected to the control unit.
  • This can be a direct or indirect connection.
  • the pressure sensor can send a signal to the control unit, which then processes this signal.
  • the pressure sensor sends the instantaneous pressure to the control unit.
  • the control unit can evaluate the signal and open the first valve when the pressure difference reaches or exceeds the predefinable maximum pressure difference. Similarly, the control unit may open the first valve when the current pressure reaches or falls below the predetermined minimum pressure.
  • control unit can control the first valve according to such predefinable parameters and / or values if the pressure difference does not reach the predefinable maximum pressure difference and / or the instantaneous pressure does not reach the predeterminable minimum pressure.
  • the pressure sensor and the first valve can form a unit. This can represent a cost-effective variant, which at the same time can facilitate installation within the heating circuit.
  • the invention also relates to a method for operating a heating system, comprising at least one heating circuit, a fluid circulating in the heating circuit, at least one heat generator, a first valve and a second valve, wherein a pressure sensor is located between the first and second valve.
  • the method is characterized in that the first valve is at least partially opened when the pressure difference determined by the pressure sensor reaches or exceeds a predefinable maximum pressure difference and / or when the instantaneous pressure reaches or falls below a predeterminable minimum pressure.
  • the first valve is controlled and / or regulated according to predefinable parameters and / or values, provided that the pressure difference does not reach the predefinable maximum pressure difference and / or the measured pressure does not reach the predeterminable minimum pressure.
  • a warning message may be issued, in particular a flashing and / or a tone and / or a text. This offers the advantage that it can respond quickly and adequately to possible errors.
  • the single FIGURE shows an embodiment of a heating system according to the invention.
  • the figure shows an embodiment of a heating system 10 according to the invention.
  • the heating system 10 has a heating circuit 12, in which water circulates. For circulation of the water is in the heating circuit 12, a pump 20. Further, the heating circuit 12 a check valve 22. An expansion vessel 28 catches the differences in pressure caused by temperature differences of the circulating water and thus ensures a balanced pressure within the heating system.
  • a heat generator 16 which heats the circulating in the heating circuit 12 water. Heat is released to the environment via a heat consumer 24 with a thermostatic valve 26.
  • a water tank 18 and a fresh water station stores heated water, which can be used depending on the requirements for heating domestic hot water. For this purpose, there is a heat exchanger (not shown) in the water tank 18.
  • a three-way valve 30 is located in the flow of the heat generator 24 in front of the water tank 18 and the heat consumer 24, so that can be changed between Schumacher- and service water demand as needed.
  • the three-way valve 30 opens in the direction of the water reservoir 18, whereas in the direction of the heat consumer 24 is closed.
  • the three-way valve 30 opens in the direction of the heat consumer 24, and in the direction of the water reservoir 18 it closes.
  • the thermostatic valve 26 closes or opens depending on the requirement: If a predefinable setpoint temperature is reached, it closes, otherwise it is partially or completely open.
  • a pressure sensor 36 Between the three-way valve 30 and the thermostatic valve 26 of the heat consumer 24 is a pressure sensor 36.
  • the pressure sensor 36 is connected to a control unit 38, so that communication is possible.
  • This connection may be, for example, a wired or wireless connection.
  • the control unit 38 is a separate unit. Alternatives are of course conceivable. Thus, the control unit 38 may also be located in the heat generator 16.
  • control unit 38 there are also connections from the control unit 38 to other components of the heating system 10, as to the pump 20, to the Water storage 18, to the heat consumer 24, the three-way valve 30 and the thermostatic valve 26th
  • the pressure sensor 36 measures the pressure at regular time intervals, inter alia the initial pressure, that is, the pressure at a predefinable start time. Thereafter, it measures the present at the three-way valve 30 instantaneous pressure to a predetermined later date.
  • the first valve 30 and / or the second valve 26 may be closed or opened, in particular partially open.
  • the pressure sensor 36 forwards the measured pressure values to the control unit 38, which evaluates them.
  • the control unit 38 calculates, inter alia, the pressure difference, which is the amount of the difference between the initial pressure and the instantaneous pressure, a pressure gradient, the minimum pressure and / or the maximum pressure difference, if these are not predetermined.
  • the control and / or regulating unit 38 monitors changes in the pressure in a specific time interval via the pressure sensor 36.
  • the control unit 38 finally generates corresponding commands or signals which are sent to the pressure sensor 36 and / or to the three-way valve 30 for execution.
  • the pressure sensor 36 may also be a direct connection between the pressure sensor 36 and the three-way valve 30.
  • the pressure sensor 36 and the three-way valve 30 directly communicate with each other.
  • the pressure sensor 36 itself evaluates the measured pressure values and sends commands, for example in the form of signals, to the three-way valve 30.
  • the three-way valve 30 and the thermostatic valve 26 are closed at the same time, there may be water in the line between the three-way valve 30 and the thermostatic valve 26, which is referred to as trapped water. If this is warm water, it will cool down over time. The pressure of the trapped water drops. For safety reasons, the pressure of the trapped, cold water must not fall below a minimum allowable pressure. Alternatively or at the same time, the pressure difference at the three-way valve 30 may not exceed a maximum permitted pressure difference Otherwise, the force of the pressure difference could exceed the force of the three-way valve 30, so that the three-way valve 30 is blocked.
  • the minimum pressure or the maximum pressure difference are predefinable or calculable variables that are dependent on the existing heating system.
  • the control unit 38 checks whether the currently measured pressure reaches or falls below a minimum pressure or whether the pressure difference reaches or exceeds a maximum pressure difference. Momentary pressure and pressure difference can also be considered simultaneously.
  • the pressure sensor 36 checks whether the minimum pressure and / or the maximum pressure difference have been reached, if the pressure sensor 36 has the necessary means.
  • the control unit 38 or the pressure sensor 36 now determines that the minimum pressure is reached or fallen below or that the maximum pressure difference is reached or exceeded, the control unit 38 sends a signal to open the three-way valve 30. If between the pressure sensor 36 and the three-way valve 30 is a direct connection, the pressure sensor 36, the signal to open also send directly to the three-way valve 30. By opening the three-way valve 30, the pressure conditions normalize. After the pressure sensor 36 detects a normalized pressure, the pressure sensor 36 sends a signal to close the control unit 38 or alternatively to the three-way valve 30, so that the three-way valve 30 closes in the direction of the heat consumer 24 again or then occupies the necessary position for the heating control.
  • connection to the three-way valve 30 and the pressure sensor 36 is or is faulty. This can be done, for example, by the control unit 38, for example by sending a request signal to the pressure sensor 36 at regular intervals and waiting for the receipt of a response signal from the pressure sensor 36.
  • similar or other procedures for checking the connection can also be carried out by the pressure sensor 36 itself or the heat generator 16 or by other components of the heating system 10.
  • the corresponding component such as the control unit 38, issues a warning, such as a flashing and / or a single or multiple tone and / or a text message that appears on a display.
  • the control unit 38 may send a corresponding warning signal to an external unit (not shown) which outputs the warning.
  • This external unit can be located, for example, in a living room, so that the warning is immediately perceived by persons present.
  • control unit 38 may initiate appropriate steps to ensure the safety of the heating system 10, such as opening the three-way valve 30 or, in particular, if the pressure does not normalize, stopping the operation of the heating system 10.
  • the pressure sensor 36 can check whether a connection to the heat generator 16 and / or to the three-way valve 30 exists or is faulty. If the pressure sensor 36 has the necessary means, it issues a warning, for example a blinking and / or a sound, provided that it detects problems with the connection. He initiates, if necessary, appropriate steps to ensure the safety of the heating system 10. For example, it may initiate the opening of the three-way valve 30 and, if the pressure does not normalize, send a warning signal to the control unit 38, which then, for example, stops the operation of the heating system 10.
  • a warning for example a blinking and / or a sound
  • the control unit 38 records the measured pressure values and calculated pressure differences. Furthermore, it stores the cases in which the minimum Pressure and / or the maximum pressure difference were reached. If required, the data can be read from the control unit 38 for diagnosis and prognosis purposes and / or retrieved.
  • the pressure sensor 36 can alternatively or at the same time record and / or store the measured pressure values and calculated pressure differences, which are then called up as needed.
  • the three-way valve 30 is partially or fully opened in one step of the method, if it was previously closed. As a result, a normalization of the pressure is achieved without affecting the warming of the drinking water.
  • the opened three-way valve 30 is closed again, unless there is another requirement, such as a Schumacheranograph, so that the three-way valve 30 and the thermostatic valve 26 must be opened.
  • the three-way valve 30 and the thermostatic valve 26 are controlled and controlled according to predeterminable values or parameters, for example according to a predefinable setpoint temperature or a pending hot water tap.
  • a request signal is sent to the pressure sensor 36 at regular intervals and waits for the receipt of a response signal from the pressure sensor 36.
  • An error analysis is either carried out automatically at regular intervals or started from the outside.
  • a warning is issued, such as a flash, a tone and / or a text on a display.
  • a warning is issued, such as a flash, a tone and / or a text on a display.

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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)
  • Water Supply & Treatment (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

Die Erfindung betrifft eine Heizungsanlage, umfassend mindestens einen Heizkreis, ein im Heizkreis zirkulierendes Fluid, mindestens einen Wärmeerzeuger, ein erstes Ventil und ein zweites Ventil. Es wird vorgeschlagen, dass sich ein Drucksensor zwischen dem ersten Ventil und dem zweiten Ventil befindet.The invention relates to a heating system comprising at least one heating circuit, a circulating fluid in the heating circuit, at least one heat generator, a first valve and a second valve. It is proposed that a pressure sensor is located between the first valve and the second valve.

Description

Die Erfindung betrifft eine Heizungsanlage, umfassend mindestens einen Heizkreis, ein im Heizkreis zirkulierendes Fluid, mindestens einen Wärmeerzeuger, ein erstes Ventil und ein zweites Ventil. Weiter betrifft die Erfindung ein Verfahren zum Betreiben der Heizungsanlage.The invention relates to a heating system comprising at least one heating circuit, a circulating fluid in the heating circuit, at least one heat generator, a first valve and a second valve. Furthermore, the invention relates to a method for operating the heating system.

Stand der TechnikState of the art

Es werden Heizgeräte eingesetzt, welche sowohl zum Erwärmen von Heizwasser als auch von Trinkwasser verwendet werden. Diese werden oft als Kombi-Heizgeräte bezeichnet. Hierbei ermöglicht ein Ventil den Wechsel zwischen Brauchwasser- und Heizwasserbereitstellung.There are heaters used, which are used both for heating of heating water and drinking water. These are often referred to as combi heaters. Here, a valve allows the change between hot water and Heizwasserbereitstellung.

Eine ein Kombi-Heizgerät aufweisende Heizungsanlage umfasst auch ein Ausdehnungsgefäß, das für einen konstanten Druck in der Heizungsanlage sorgt. Um zu jeder Zeit einen Druckausgleich zum Ausdehnungsgefäß herstellen zu können, ist oftmals eine Bypassschaltung zwischen Vorlauf und Rücklauf des Heizgerätes notwendig.A heating system with a combination heater also includes an expansion tank, which ensures a constant pressure in the heating system. To be able to produce a pressure equalization to the expansion tank at any time, often a bypass circuit between the flow and return of the heater is necessary.

Eine solche Bypassschaltung hat den Nachteil, dass die Heizungsanlage an Heizleistung verliert.Such a bypass circuit has the disadvantage that the heating system loses heating power.

Offenbarung der ErfindungDisclosure of the invention

Dieser Nachteil des Stands der Technik wird durch die erfindungsgemäße Heizungsanlage gemäß dem Hauptanspruch behoben. Die Heizungsanlage umfasst mindestens einen Heizkreis und ein in diesem zirkulierendes Fluid. Weiter umfasst die Heizungsanlage mindestens einen Wärmeerzeuger, ein erstes und ein zweites Ventil. Die Heizungsanlage zeichnet sich dadurch aus, dass zwischen dem ersten und zweiten Ventil ein Drucksensor angeordnet ist. Der Drucksensor stellt Druckvariationen fest, auf die die Heizungsanlage reagieren oder eingestellt werden kann.This disadvantage of the prior art is solved by the heating system according to the invention according to the main claim. The heating system comprises at least one heating circuit and a circulating fluid in this. Furthermore, the heating system comprises at least one heat generator, a first and a second valve. The heating system is characterized by the fact that between the first and second valve, a pressure sensor is arranged. The pressure sensor detects pressure variations to which the heating system can react or be adjusted.

Unter einem Fluid ist ein Medium zu verstehen, welches Wärme aufnehmen und abgeben kann. Dies können unter anderem gasförmige, flüssige oder auch feste Stoffe sein.A fluid is to be understood as a medium which can absorb and release heat. These may be, inter alia, gaseous, liquid or even solid substances.

Die sich im Heizkreis befindlichen ersten und zweiten Ventile verfügen mindestens über eine Schließ- und Öffnungsfunktion. Schließt ein Ventil, so kann das Fluid dieses nicht passieren. Ist ein Ventil geöffnet, so kann das Fluid durch das Ventil hindurchtreten. Das Ventil kann auch teilweise geöffnet oder geschlossen sein. Bei dem Ventil kann es sich beispielsweise um ein Dreiwegeventil oder ein Thermostatventil oder dergleichen handeln.The first and second valves in the heating circuit have at least one closing and opening function. If a valve closes, the fluid can not pass through it. If a valve is open, the fluid can pass through the valve. The valve may also be partially opened or closed. The valve may be, for example, a three-way valve or a thermostatic valve or the like.

Durch die in den Unteransprüchen aufgeführten Merkmale sind vorteilhafte Weiterbildungen der erfindungsgemäßen Heizungsanlage nach dem Hauptanspruch möglich.The features listed in the dependent claims advantageous refinements of the heating system according to the invention according to the main claim are possible.

Der Drucksensor bestimmt einen Anfangsdruck und einen momentanen Druck. Ein Anfangsdruck ist der Druck, der zu einem vorgebbaren Anfangszeitpunkt vom Drucksensor gemessen wird. Ein momentaner Druck ist der Druck, der nach diesem Anfangszeitpunkt zu einem vorgebbaren späteren Zeitpunkt gemessen wird. Aus den Messergebnissen kann eine Druckdifferenz bestimmt werden, welche definiert ist als der Betrag der Differenz zwischen dem momentanen Druck und dem Anfangsdruck. Das erste Ventil und/oder das zweite Ventil kann bei der Messung des Anfangs- oder momentanen Druckes geschlossen oder geöffnet sein.The pressure sensor determines an initial pressure and a current pressure. An initial pressure is the pressure that is measured by the pressure sensor at a predeterminable start time. A current pressure is the pressure measured after this starting time at a predeterminable later time. From the measurement results, a pressure difference can be determined, which is defined as the amount of the difference between the instantaneous pressure and the initial pressure. The first valve and / or the second valve may be closed or opened in the measurement of the initial or instantaneous pressure.

Es ist vorteilhaft, wenn das erste Ventil öffnet, wenn die Druckdifferenz eine vorgebbare maximale Druckdifferenz erreicht oder überschreitet. Hierbei wird der Betrag der Druckdifferenz betrachtet.It is advantageous if the first valve opens when the pressure difference reaches or exceeds a predefinable maximum pressure difference. Here, the amount of the pressure difference is considered.

Eine maximale Druckdifferenz ist der Betrag einer Druckdifferenz, bis zu welcher der sichere Betrieb der Heizungsanlage gewährleistet ist. Wird die maximale Druckdifferenz erreicht oder überschritten, so blockiert das erste oder zweite Ventil.A maximum pressure difference is the amount of pressure difference up to which the safe operation of the heating system is guaranteed. If the maximum pressure difference is reached or exceeded, the first or second valve blocks.

Analog ist ein minimaler Druck zu verstehen. Wird die maximale Druckdifferenz erreicht oder überschritten bzw. der minimale Druck erreicht oder unterschritten, so müssen entsprechende Schritte zum Druckausgleich eingeleitet werden.Analog is a minimum pressure to understand. If the maximum pressure difference is reached or exceeded or the minimum pressure is reached or undershot, appropriate steps for pressure equalization must be initiated.

Analog zur Druckdifferenz kann also der momentane Druck mit dem vorgebbaren minimalen Druck verglichen werden. Sofern der momentane Druck den vorgebbaren minimalen Druck unterschreitet, öffnet das Ventil. So wird der sichere Betrieb der Heizungsanlage unter optimierten Bedingungen gewährleistet.Analogous to the pressure difference, therefore, the instantaneous pressure can be compared with the predeterminable minimum pressure. If the current pressure falls below the presettable minimum pressure, the valve opens. This ensures safe operation of the heating system under optimized conditions.

Um einen optimierten Betrieb zu ermöglichen, ist es von Vorteil, wenn das erste Ventil oder der Drucksensor mit einer Steuereinheit verbunden sind. Auch beide Komponenten, das erste Ventil und der Drucksensor, können mit der Steuereinheit verbunden sein. Hierbei kann es sich um eine direkte oder indirekte Verbindung handeln. Beispielsweise kann der Drucksensor ein Signal an die Steuereinheit senden, welche dieses Signal dann bearbeitet.In order to enable optimized operation, it is advantageous if the first valve or the pressure sensor are connected to a control unit. Also, both components, the first valve and the pressure sensor, may be connected to the control unit. This can be a direct or indirect connection. For example, the pressure sensor can send a signal to the control unit, which then processes this signal.

Hierbei ist es weiter vorteilhaft, wenn der Drucksensor den momentanen Druck an die Steuereinheit sendet. Die Steuereinheit kann das Signal auswerten und das erste Ventil öffnen, wenn die Druckdifferenz die vorgebbare maximale Druckdifferenz erreicht oder übersteigt. Analog kann die Steuereinheit das erste Ventil öffnen, wenn der momentane Druck den vorgebbaren minimalen Druck erreicht oder unterschreitet.It is further advantageous if the pressure sensor sends the instantaneous pressure to the control unit. The control unit can evaluate the signal and open the first valve when the pressure difference reaches or exceeds the predefinable maximum pressure difference. Similarly, the control unit may open the first valve when the current pressure reaches or falls below the predetermined minimum pressure.

Zum Betrieb der Heizungsanlage werden Parameter und/oder Werte vorgegeben. Hierfür ist es von Vorteil, wenn die Steuereinheit das erste Ventil gemäß solcher vorgebbaren Parameter und/oder Werte steuern kann, wenn die Druckdifferenz die vorgebbare maximale Druckdifferenz und/oder der momentane Druck den vorgebbaren minimalen Druck nicht erreicht.For operation of the heating system, parameters and / or values are specified. For this purpose, it is advantageous if the control unit can control the first valve according to such predefinable parameters and / or values if the pressure difference does not reach the predefinable maximum pressure difference and / or the instantaneous pressure does not reach the predeterminable minimum pressure.

Der Drucksensor und das erste Ventil können eine Einheit bilden. Dies kann eine kostengünstige Variante darstellen, welche zugleich die Installation innerhalb des Heizkreises erleichtern kann.The pressure sensor and the first valve can form a unit. This can represent a cost-effective variant, which at the same time can facilitate installation within the heating circuit.

Die Erfindung betrifft auch ein Verfahren zum Betreiben einer Heizungsanlage, umfassend mindestens einen Heizkreis, ein im Heizkreis zirkulierendes Fluid, mindestens einen Wärmeerzeuger, ein erstes Ventil und ein zweites Ventil, wobei sich ein Drucksensor zwischen dem ersten und zweiten Ventil befindet. Das Verfahren zeichnet sich dadurch aus, dass das erste Ventil mindestens teilweise geöffnet wird, wenn die von dem Drucksensor bestimmte Druckdifferenz eine vorgebbare maximale Druckdifferenz erreicht oder übersteigt und/oder wenn der momentane Druck einen vorgebbaren minimalen Druck erreicht oder unterschreitet.The invention also relates to a method for operating a heating system, comprising at least one heating circuit, a fluid circulating in the heating circuit, at least one heat generator, a first valve and a second valve, wherein a pressure sensor is located between the first and second valve. The method is characterized in that the first valve is at least partially opened when the pressure difference determined by the pressure sensor reaches or exceeds a predefinable maximum pressure difference and / or when the instantaneous pressure reaches or falls below a predeterminable minimum pressure.

Es ist von Vorteil, wenn das erste Ventil gemäß vorgebbaren Parametern und/oder Werten gesteuert und/oder geregelt wird, sofern die Druckdifferenz die vorgebbare maximale Druckdifferenz und/oder der gemessene Druck den vorgebbaren minimalen Druck nicht erreicht.It is advantageous if the first valve is controlled and / or regulated according to predefinable parameters and / or values, provided that the pressure difference does not reach the predefinable maximum pressure difference and / or the measured pressure does not reach the predeterminable minimum pressure.

Um einen sicheren Betrieb der Heizungsanlage zu gewährleisten, ist es vorteilhaft, wenn entsprechende Schritte eingeleitet werden, sofern die Verbindung zwischen der Steuereinheit und dem Drucksensor nicht besteht oder fehlerhaft ist. In diesem Fall kann eine Warnmeldung ausgegeben werden, insbesondere ein Blinken und/oder ein Ton und/oder ein Text. Dies bietet den Vorteil, dass auf mögliche Fehler schnell und adäquat reagiert werden kann.To ensure safe operation of the heating system, it is advantageous if appropriate steps are initiated, provided that the connection between the control unit and the pressure sensor does not exist or is faulty. In this case, a warning message may be issued, in particular a flashing and / or a tone and / or a text. This offers the advantage that it can respond quickly and adequately to possible errors.

Zeichnungdrawing

Die einzige Figur zeigt ein Ausführungsbeispiel einer erfindungsgemäßen Heizungsanlage.The single FIGURE shows an embodiment of a heating system according to the invention.

Beschreibung der ZeichnungenDescription of the drawings

Die Figur zeigt ein Ausführungsbeispiel einer erfindungsgemäßen Heizungsanlage 10. Die Heizungsanlage 10 weist einen Heizkreis 12 auf, in welchem Wasser zirkuliert. Zur Zirkulation des Wassers befindet sich im Heizkreis 12 eine Pumpe 20. Weiter weist der Heizkreis 12 ein Absperrventil 22 auf. Ein Ausdehnungsgefäß 28 fängt die durch Temperaturdifferenzen des zirkulierenden Wassers entstehenden Druckunterschiede auf und sorgt so für einen ausgeglichenen Druck innerhalb des Heizsystems.The figure shows an embodiment of a heating system 10 according to the invention. The heating system 10 has a heating circuit 12, in which water circulates. For circulation of the water is in the heating circuit 12, a pump 20. Further, the heating circuit 12 a check valve 22. An expansion vessel 28 catches the differences in pressure caused by temperature differences of the circulating water and thus ensures a balanced pressure within the heating system.

Im Heizkreis 12 befindet sich ein Wärmeerzeuger 16, welcher das im Heizkreis 12 zirkulierende Wasser erwärmt. Über einen Wärmeverbraucher 24 mit einem Thermostatventil 26 wird Wärme an die Umgebung abgegeben. Ein Wasserspeicher 18 bzw. eine Frischwasserstation speichert erwärmtes Wasser, welches je nach Anforderung zur Erwärmung von Brauchwasser verwendet werden kann. Hierfür befindet sich in dem Wasserspeicher 18 ein Wärmetauscher (nicht dargestellt).In the heating circuit 12 is a heat generator 16, which heats the circulating in the heating circuit 12 water. Heat is released to the environment via a heat consumer 24 with a thermostatic valve 26. A water tank 18 and a fresh water station stores heated water, which can be used depending on the requirements for heating domestic hot water. For this purpose, there is a heat exchanger (not shown) in the water tank 18.

Ein Dreiwegeventil 30 befindet sich im Vorlauf des Wärmeerzeugers 24 vor dem Wasserspeicher 18 und dem Wärmeverbraucher 24, so dass zwischen Heizwasser- und Brauchwasseranforderung je nach Bedarf gewechselt werden kann.A three-way valve 30 is located in the flow of the heat generator 24 in front of the water tank 18 and the heat consumer 24, so that can be changed between Heizwasser- and service water demand as needed.

Wird warmes Brauchwasser angefordert, so öffnet das Dreiwegeventil 30 in Richtung des Wasserspeichers 18, wohingegen in Richtung des Wärmeverbrauchers 24 geschlossen wird.If hot service water is requested, the three-way valve 30 opens in the direction of the water reservoir 18, whereas in the direction of the heat consumer 24 is closed.

Wird warmes Heizwasser benötigt, so öffnet das Dreiwegeventil 30 in Richtung des Wärmeverbrauchers 24, und in Richtung des Wasserspeichers 18 schließt es. Das Thermostatventil 26 schließt oder öffnet je nach Anforderung: Ist eine vorgebbare Sollwerttemperatur erreicht, so schließt es, ansonsten ist es teilweise oder ganz geöffnet.If hot heating water is required, the three-way valve 30 opens in the direction of the heat consumer 24, and in the direction of the water reservoir 18 it closes. The thermostatic valve 26 closes or opens depending on the requirement: If a predefinable setpoint temperature is reached, it closes, otherwise it is partially or completely open.

Zwischen dem Dreiwegeventil 30 und dem Thermostatventil 26 des Wärmeverbrauchers 24 befindet sich ein Drucksensor 36. Der Drucksensor 36 ist mit einer Steuereinheit 38 verbunden, so dass eine Kommunikation möglich ist. Bei dieser Verbindung kann es sich beispielsweise um eine kabelgebundene oder kabellose Verbindung handeln. Im Ausführungsbeispiel stellt die Steuereinheit 38 eine eigene Einheit dar. Alternativen sind selbstverständlich denkbar. So kann sich die Steuereinheit 38 ebenso im Wärmeerzeuger 16 befinden.Between the three-way valve 30 and the thermostatic valve 26 of the heat consumer 24 is a pressure sensor 36. The pressure sensor 36 is connected to a control unit 38, so that communication is possible. This connection may be, for example, a wired or wireless connection. In the exemplary embodiment, the control unit 38 is a separate unit. Alternatives are of course conceivable. Thus, the control unit 38 may also be located in the heat generator 16.

Es bestehen auch Verbindungen von der Steuereinheit 38 zu weiteren Komponenten der Heizungsanlage 10, wie zu der Pumpe 20, zu dem Wasserspeicher 18, zu dem Wärmeverbraucher 24, zum Dreiwegeventil 30 und dem Thermostatventil 26.There are also connections from the control unit 38 to other components of the heating system 10, as to the pump 20, to the Water storage 18, to the heat consumer 24, the three-way valve 30 and the thermostatic valve 26th

Der Drucksensor 36 misst in regelmäßigen Zeitabständen den Druck, unter anderem den Anfangsdruck, das heißt, den Druck zu einem vorgebbaren Anfangszeitpunkt. Danach misst er den am Dreiwegeventil 30 vorhandenen momentanen Druck zu einem vorgebbaren späteren Zeitpunkt. Dabei können das erste Ventil 30 und/oder das zweite Ventil 26 geschlossen oder geöffnet, insbesondere teilweise geöffnet, sein.The pressure sensor 36 measures the pressure at regular time intervals, inter alia the initial pressure, that is, the pressure at a predefinable start time. Thereafter, it measures the present at the three-way valve 30 instantaneous pressure to a predetermined later date. In this case, the first valve 30 and / or the second valve 26 may be closed or opened, in particular partially open.

Der Drucksensor 36 leitet die gemessenen Druckwerte an die Steuereinheit 38 weiter, welche diese auswertet. Die Steuereinheit 38 berechnet unter anderem die Druckdifferenz, welche der Betrag der Differenz zwischen Anfangsdruck und momentanem Druck ist, einen Druckgradienten, den minimalen Druck und/oder die maximale Druckdifferenz, sofern diese nicht vorgegeben sind. So überwacht die Steuer- und/oder Regeleinheit 38 über den Drucksensor 36 Änderungen im Druck in einem bestimmten Zeitintervall. Die Steuereinheit 38 generiert schließlich entsprechende Befehle oder Signale, die an den Drucksensor 36 und/oder an das Dreiwegeventil 30 zur Ausführung gesendet werden.The pressure sensor 36 forwards the measured pressure values to the control unit 38, which evaluates them. The control unit 38 calculates, inter alia, the pressure difference, which is the amount of the difference between the initial pressure and the instantaneous pressure, a pressure gradient, the minimum pressure and / or the maximum pressure difference, if these are not predetermined. Thus, the control and / or regulating unit 38 monitors changes in the pressure in a specific time interval via the pressure sensor 36. The control unit 38 finally generates corresponding commands or signals which are sent to the pressure sensor 36 and / or to the three-way valve 30 for execution.

Alternativ kann auch eine direkte Verbindung zwischen dem Drucksensor 36 und dem Dreiwegeventil 30 bestehen. In diesem Fall kommunizieren der Drucksensor 36 und das Dreiwegeventil 30 direkt miteinander. In diesem Fall wertet der Drucksensor 36 selbst die gemessenen Druckwerte aus und sendet Befehle, beispielsweise in Form von Signalen, an das Dreiwegeventil 30.Alternatively, there may also be a direct connection between the pressure sensor 36 and the three-way valve 30. In this case, the pressure sensor 36 and the three-way valve 30 directly communicate with each other. In this case, the pressure sensor 36 itself evaluates the measured pressure values and sends commands, for example in the form of signals, to the three-way valve 30.

Sind das Dreiwegeventil 30 und das Thermostatventil 26 gleichzeitig geschlossen, so kann sich in der Leitung zwischen dem Dreiwegeventil 30 und dem Thermostatventil 26 Wasser befinden, welches als gefangenes Wasser bezeichnet wird. Handelt es sich hierbei um warmes Wasser, so kühlt dieses mit der Zeit aus. Der Druck des gefangenen Wassers fällt ab. Aus Sicherheitsgründen darf der Druck des gefangenen, kalten Wassers nicht unter einen minimal erlaubten Druck fallen. Alternativ oder zugleich darf die Druckdifferenz am Dreiwegeventil 30 eine maximal erlaubte Druckdifferenz nicht überschreiten, da sonst die Kraft der Druckdifferenz die Kraft des Dreiwegeventils 30 überschreiten könnte, so dass das Dreiwegeventil 30 blockiert.If the three-way valve 30 and the thermostatic valve 26 are closed at the same time, there may be water in the line between the three-way valve 30 and the thermostatic valve 26, which is referred to as trapped water. If this is warm water, it will cool down over time. The pressure of the trapped water drops. For safety reasons, the pressure of the trapped, cold water must not fall below a minimum allowable pressure. Alternatively or at the same time, the pressure difference at the three-way valve 30 may not exceed a maximum permitted pressure difference Otherwise, the force of the pressure difference could exceed the force of the three-way valve 30, so that the three-way valve 30 is blocked.

Der minimale Druck bzw. die maximale Druckdifferenz sind vorgebbare oder berechenbare Größen, die abhängig vom vorhandenen Heizsystem sind.The minimum pressure or the maximum pressure difference are predefinable or calculable variables that are dependent on the existing heating system.

Die Steuereinheit 38 überprüft, ob der momentan gemessene Druck einen minimalen Druck erreicht oder unterschreitet oder ob die Druckdifferenz eine maximale Druckdifferenz erreicht oder überschreitet. Es können auch momentaner Druck und Druckdifferenz gleichzeitig berücksichtigt werden.The control unit 38 checks whether the currently measured pressure reaches or falls below a minimum pressure or whether the pressure difference reaches or exceeds a maximum pressure difference. Momentary pressure and pressure difference can also be considered simultaneously.

Alternativ überprüft der Drucksensor 36, ob der minimale Druck und/oder die maximale Druckdifferenz erreicht wurden, sofern der Drucksensor 36 über die nötigen Mittel verfügt.Alternatively, the pressure sensor 36 checks whether the minimum pressure and / or the maximum pressure difference have been reached, if the pressure sensor 36 has the necessary means.

Wird der minimale Druck oder die maximale Druckdifferenz erreicht, so müssen Maßnahmen zum Druckausgleich eingeleitet werden.If the minimum pressure or the maximum pressure difference is reached, measures for pressure equalization must be initiated.

Stellt die Steuereinheit 38 bzw. der Drucksensor 36 nun fest, dass der minimale Druck erreicht oder unterschritten wird oder dass die maximale Druckdifferenz erreicht oder überschritten wird, so sendet die Steuereinheit 38 ein Signal zum Öffnen an das Dreiwegeventil 30. Sofern zwischen dem Drucksensor 36 und dem Dreiwegeventil 30 eine direkte Verbindung besteht, kann der Drucksensor 36 das Signal zum Öffnen auch direkt an das Dreiwegeventil 30 senden. Durch das Öffnen des Dreiwegeventils 30 normalisieren sich die Druckverhältnisse. Nachdem der Drucksensor 36 einen normalisierten Druck feststellt, sendet der Drucksensor 36 ein Signal zum Schließen an die Steuereinheit 38 oder alternativ an das Dreiwegeventil 30, so dass das Dreiwegeventil 30 in Richtung des Wärmeverbrauchers 24 wieder schließt oder die dann für die Heizungsregelung notwendige Stellung einnimmt.If the control unit 38 or the pressure sensor 36 now determines that the minimum pressure is reached or fallen below or that the maximum pressure difference is reached or exceeded, the control unit 38 sends a signal to open the three-way valve 30. If between the pressure sensor 36 and the three-way valve 30 is a direct connection, the pressure sensor 36, the signal to open also send directly to the three-way valve 30. By opening the three-way valve 30, the pressure conditions normalize. After the pressure sensor 36 detects a normalized pressure, the pressure sensor 36 sends a signal to close the control unit 38 or alternatively to the three-way valve 30, so that the three-way valve 30 closes in the direction of the heat consumer 24 again or then occupies the necessary position for the heating control.

Aus Sicherheitsgründen wird in regelmäßigen Abständen überprüft, ob die Verbindung zu dem Dreiwegeventil 30 und dem Drucksensor 36 besteht oder fehlerhaft ist. Dies kann beispielsweise durch die Steuereinheit 38 erfolgen, indem sie beispielsweise in regelmäßigen Abständen ein Anfragesignal an den Drucksensor 36 sendet und auf den Empfang eines Antwortsignals vom Drucksensor 36 wartet. Ähnliche oder andere Vorgehensweisen zur Überprüfung der Verbindung können aber auch durch Drucksensor 36 selbst oder den Wärmeerzeuger 16 oder durch andere Komponenten der Heizungsanlage 10 durchgeführt werden.For safety reasons, it is checked at regular intervals whether the connection to the three-way valve 30 and the pressure sensor 36 is or is faulty. This can be done, for example, by the control unit 38, for example by sending a request signal to the pressure sensor 36 at regular intervals and waiting for the receipt of a response signal from the pressure sensor 36. However, similar or other procedures for checking the connection can also be carried out by the pressure sensor 36 itself or the heat generator 16 or by other components of the heating system 10.

Wird eine fehlerhafte oder nicht vorhandene Verbindung festgestellt, so gibt die entsprechende Komponente, wie die Steuereinheit 38, einen Warnhinweis aus, beispielsweise ein Blinken und/oder einen einmaligen oder mehrmaligen Ton und/oder eine Textmeldung, die auf einer Anzeige erscheint. Alternativ kann die Steuereinheit 38 ein entsprechendes Warnsignal an eine externe Einheit (nicht dargestellt) senden, welche den Warnhinweis ausgibt. Diese externe Einheit kann sich beispielsweise in einem Wohnraum befinden, so dass der Warnhinweis von anwesenden Personen sofort wahrgenommen wird.If a faulty or non-existent connection is detected, the corresponding component, such as the control unit 38, issues a warning, such as a flashing and / or a single or multiple tone and / or a text message that appears on a display. Alternatively, the control unit 38 may send a corresponding warning signal to an external unit (not shown) which outputs the warning. This external unit can be located, for example, in a living room, so that the warning is immediately perceived by persons present.

Weiter kann die Steuereinheit 38 entsprechende Schritte zur Gewährleistung der Sicherheit der Heizungsanlage 10 einleiten, wie beispielsweise das Öffnen des Dreiwegeventils 30 oder, insbesondere wenn der Druck sich nicht normalisiert, das Einstellen des Betriebes der Heizungsanlage 10.Further, the control unit 38 may initiate appropriate steps to ensure the safety of the heating system 10, such as opening the three-way valve 30 or, in particular, if the pressure does not normalize, stopping the operation of the heating system 10.

Alternativ oder zugleich kann der Drucksensor 36 überprüfen, ob eine Verbindung zum Wärmeerzeuger 16 und/oder zum Dreiwegeventil 30 besteht oder fehlerhaft ist. Verfügt der Drucksensor 36 über die nötigen Mittel, so gibt er einen Warnhinweis aus, beispielsweise ein Blinken und/oder einen Ton, sofern er Probleme mit der Verbindung feststellt. Er leitet, sofern nötig, entsprechende Schritte zur Gewährleistung der Sicherheit der Heizungsanlage 10 ein. Beispielsweise kann er das Öffnen des Dreiwegeventils 30 veranlassen und, falls der Druck sich nicht normalisiert, ein Warnsignal an die Steuereinheit 38 senden, welche dann beispielsweise den Betrieb der Heizungsanlage 10 einstellt.Alternatively or at the same time, the pressure sensor 36 can check whether a connection to the heat generator 16 and / or to the three-way valve 30 exists or is faulty. If the pressure sensor 36 has the necessary means, it issues a warning, for example a blinking and / or a sound, provided that it detects problems with the connection. He initiates, if necessary, appropriate steps to ensure the safety of the heating system 10. For example, it may initiate the opening of the three-way valve 30 and, if the pressure does not normalize, send a warning signal to the control unit 38, which then, for example, stops the operation of the heating system 10.

Die Steuereinheit 38 zeichnet die gemessenen Druckwerte und berechneten Druckdifferenzen auf. Desweiteren speichert sie die Fälle, in denen der minimale Druck und/oder die maximale Druckdifferenz erreicht wurden. Die Daten können bei Bedarf aus der Steuereinheit 38 zu Diagnose- und Prognosezwecken ausgelesen und/oder abgerufen werden.The control unit 38 records the measured pressure values and calculated pressure differences. Furthermore, it stores the cases in which the minimum Pressure and / or the maximum pressure difference were reached. If required, the data can be read from the control unit 38 for diagnosis and prognosis purposes and / or retrieved.

Verfügt der Drucksensor 36 über entsprechende Mittel, so kann dieser alternativ oder zugleich die gemessenen Druckwerte und berechneten Druckdifferenzen aufzeichnen und/oder speichern, die dann bei Bedarf abgerufen werden.If the pressure sensor 36 has corresponding means, it can alternatively or at the same time record and / or store the measured pressure values and calculated pressure differences, which are then called up as needed.

Aus diesem Ausführungsbeispiel geht hervor, dass das Prinzip auf viele verschiedene Heizungsanlagen anwendbar ist, bei denen es aufgrund von gefangenem, abkühlendem Wasser zu einem Druckungleichgewicht im Heizsystem kommen kann.From this embodiment it is apparent that the principle is applicable to many different heating systems, where it can come because of trapped, cooling water to a pressure imbalance in the heating system.

Es ist auch denkbar, dass zum Druckausgleich ein gesonderter Weg im Dreiwegeventil 30 geöffnet werden kann und nicht das gesamte Ventil angesteuert werden muss.It is also conceivable that for pressure equalization a separate way in the three-way valve 30 can be opened and not the entire valve must be controlled.

Im Folgenden wird unter Zuhilfenahme des Ausführungsbeispiels die prinzipielle Funktionsweise des Verfahrens beschrieben.In the following, the basic mode of operation of the method will be described with the aid of the exemplary embodiment.

Am Drucksensor 36 wird eine Druckmessung durchgeführt.At the pressure sensor 36, a pressure measurement is performed.

Wird ein minimal erlaubter Druck und/oder eine maximal erlaubter Druckdifferenz festgestellt, so wird das Dreiwegeventil 30 in einem Schritt des Verfahrens teilweise oder ganz geöffnet, sofern es zuvor geschlossen war. Hierdurch wird eine Normalisierung des Druckes erreicht, ohne die Erwärmung des Trinkwassers zu beeinflussen.If a minimum allowable pressure and / or a maximum allowable pressure difference is detected, the three-way valve 30 is partially or fully opened in one step of the method, if it was previously closed. As a result, a normalization of the pressure is achieved without affecting the warming of the drinking water.

Sobald der Druck normalisiert ist, wird das geöffnete Dreiwegeventil 30 wieder geschlossen, es sei denn, es besteht eine anderweitige Anforderung, beispielsweise eine Heizwasseranforderung, so dass das Dreiwegeventil 30 und das Thermostatventil 26 geöffnet werden müssen.Once the pressure is normalized, the opened three-way valve 30 is closed again, unless there is another requirement, such as a Heizwasseranforderung, so that the three-way valve 30 and the thermostatic valve 26 must be opened.

Solange der gemessene Druck über dem minimalen Druck und/oder die Druckdifferenz unter der maximalen Druckdifferenz bleibt, werden das Dreiwegeventil 30 und das Thermostatventil 26 gemäß vorgebbaren Werten oder Parametern geregelt und gesteuert, beispielsweise gemäß einer vorgebbaren Sollwerttemperatur oder einer anstehenden Warmwasserzapfung.As long as the measured pressure above the minimum pressure and / or the pressure difference remains below the maximum pressure difference, the three-way valve 30 and the thermostatic valve 26 are controlled and controlled according to predeterminable values or parameters, for example according to a predefinable setpoint temperature or a pending hot water tap.

In einem weiteren Schritt des Verfahrens wird überprüft, ob zumindest die Verbindung zwischen Steuereinheit 38, Drucksensor 36 und Dreiwegeventil 30 besteht oder fehlerhaft ist. Hierfür wird beispielsweise in regelmäßigen Abständen ein Anfragesignal an den Drucksensor 36 gesendet und auf den Empfang eines Antwortsignals vom Drucksensor 36 gewartet. Eine Fehleranalyse wird entweder automatisch in regelmäßigen Abständen durchgeführt oder von außen gestartet.In a further step of the method it is checked whether at least the connection between control unit 38, pressure sensor 36 and three-way valve 30 exists or is faulty. For this purpose, for example, a request signal is sent to the pressure sensor 36 at regular intervals and waits for the receipt of a response signal from the pressure sensor 36. An error analysis is either carried out automatically at regular intervals or started from the outside.

Wird eine nicht bestehende oder fehlerhafte Verbindung festgestellt, so werden Schritte zur Gewährleistung der Sicherheit der Heizungsanlage eingeleitet. Beispielsweise wird in einem Schritt des Verfahrens ein Warnhinweis ausgegeben, wie ein Blinken, ein Ton und/oder ein Text auf einer Anzeige. In einem anderen Schritt kann es notwendig sein, dass die Heizungsanlage 10 heruntergefahren wird, um Schäden durch ein steigendes Druckungleichgewicht zu vermeiden.If a non-existent or faulty connection is detected, steps are taken to ensure the safety of the heating system. For example, in one step of the method, a warning is issued, such as a flash, a tone and / or a text on a display. In another step, it may be necessary to shut down the heating system 10 to avoid damage from increasing pressure imbalance.

Claims (9)

Heizungsanlage, umfassend mindestens einen Heizkreis (12), ein im Heizkreis (12) zirkulierendes Fluid, mindestens einen Wärmeerzeuger (16), ein erstes Ventil (30) und ein zweites Ventil (26), dadurch gekennzeichnet, dass sich ein Drucksensor (36) zwischen dem ersten Ventil (30) und dem zweiten Ventil (26) befindet.Heating system, comprising at least one heating circuit (12), a circulating fluid in the heating circuit (12), at least one heat generator (16), a first valve (30) and a second valve (26), characterized in that a pressure sensor (36) between the first valve (30) and the second valve (26). Heizungsanlage nach Anspruch 1, dadurch gekennzeichnet, dass das erste Ventil (30) mindestens teilweise öffnet, sofern eine vom Drucksensor (36) bestimmte momentane Druckdifferenz eine vorgebbare maximale Druckdifferenz erreicht oder übersteigt und/oder sofern der gemessene momentane Druck einen vorgebbaren minimalen Druck erreicht oder unterschreitet.Heating system according to claim 1, characterized in that the first valve (30) opens at least partially, if a pressure difference from the sensor (36) determines a predetermined maximum pressure difference or exceeds and / or if the measured instantaneous pressure reaches a predetermined minimum pressure or below. Heizungsanlage nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das erste Ventil (30) und/oder der Drucksensor (36) mit einer Steuereinheit (38) verbunden sind.Heating installation according to claim 1 or 2, characterized in that the first valve (30) and / or the pressure sensor (36) are connected to a control unit (38). Heizungsanlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Drucksensor (36) den momentanen Druck an die Steuereinheit (38) sendet, welche das erste Ventil (30) öffnet, sofern die momentane Druckdifferenz die vorgebbare maximalen Druckdifferenz erreicht oder übersteigt und/oder sofern der momentane Druck den vorgebbaren minimalen Druck erreicht oder unterschreitet.Heating installation according to one of the preceding claims, characterized in that the pressure sensor (36) sends the instantaneous pressure to the control unit (38) which opens the first valve (30), provided that the instantaneous pressure difference reaches or exceeds the predefinable maximum pressure difference and / or provided that the current pressure reaches or falls below the presettable minimum pressure. Heizungsanlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Steuereinheit (38) das erste Ventil (30) gemäß vorgebbaren Parametern und/oder Werten steuert, wenn die momentane Druckdifferenz die vorgebbare maximale Druckdifferenz und/oder der momentane Druck den vorgebbaren minimalen Druck nicht erreicht.Heating installation according to one of the preceding claims, characterized in that the control unit (38) controls the first valve (30) according to predefinable parameters and / or values, if the current pressure difference, the predetermined maximum pressure difference and / or the instantaneous pressure, the predetermined minimum pressure not reached. Heizungsanlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Drucksensor (36) und das erste Ventil (30) eine Einheit bilden.Heating installation according to one of the preceding claims, characterized in that the pressure sensor (36) and the first valve (30) form a unit. Verfahren zum Betreiben einer Heizungsanlage (10), umfassend mindestens einen Heizkreis (12), ein im Heizkreis (12) zirkulierendes Fluid, mindestens einen Wärmeerzeuger (16), ein erstes Ventil (30) und ein zweites Ventil (26), insbesondere nach einem der Ansprüche 1 bis 6, wobei sich ein Drucksensor (36) zwischen dem ersten Ventil (30) und dem zweiten Ventil (26) befindet, dadurch gekennzeichnet, dass das erste Ventil (30) mindestens teilweise geöffnet wird, wenn eine von dem Drucksensor (36) bestimmte momentane Druckdifferenz eine vorgebbare maximale Druckdifferenz erreicht oder übersteigt und/oder wenn der gemessene Druck einen vorgebbaren minimalen Druck erreicht oder unterschreitet.Method for operating a heating system (10), comprising at least one heating circuit (12), a fluid circulating in the heating circuit (12), at least one heat generator (16), a first valve (30) and a second valve (26), in particular after one of claims 1 to 6, wherein a pressure sensor (36) is located between the first valve (30) and the second valve (26), characterized in that the first valve (30) is at least partially opened when one of the pressure sensor ( 36) certain instantaneous pressure difference reaches or exceeds a predefinable maximum pressure difference and / or when the measured pressure reaches or falls below a predeterminable minimum pressure. Verfahren nach Anspruch 7, dadurch gekennzeichnet, dass das erste Ventil (30) gemäß vorgebbaren Parametern und/oder Werten gesteuert und/oder geregelt wird, sofern die Druckdifferenz die vorgebbare maximale Druckdifferenz und/oder der momentane Druck den vorgebbaren minimalen Druck nicht erreicht.Method according to Claim 7, characterized in that the first valve (30) is controlled and / or regulated according to predefinable parameters and / or values, provided that the pressure difference does not reach the predefinable maximum pressure difference and / or the instantaneous pressure does not reach the predeterminable minimum pressure. Verfahren nach einem der Ansprüche 7 oder 8, dadurch gekennzeichnet, dass Schritte zur Gewährleistung der Sicherheit der Heizungsanlage (10) eingeleitet werden, sofern die Verbindung zwischen der Steuereinheit (38) und dem Drucksensor (36) nicht besteht oder fehlerhaft ist, und/oder dass eine entsprechende Warnmeldung ausgegeben wird, insbesondere ein Blinken und/oder ein Ton und/oder ein Text.Method according to one of claims 7 or 8, characterized in that steps to ensure the safety of the heating system (10) are initiated, provided that the connection between the control unit (38) and the pressure sensor (36) does not exist or is faulty, and / or that a corresponding warning message is output, in particular a flashing and / or a sound and / or a text.
EP15167325.8A 2014-06-05 2015-05-12 Heating system and method for operating a heating system Active EP2957837B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022144151A1 (en) * 2021-01-04 2022-07-07 Bosch Termoteknik Isitmave Klima Sanayi Ticaret Anonim Sirketi Method for operating a heater and heater for heating a space and/or a flow of drinking water

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Publication number Priority date Publication date Assignee Title
FR2793899A1 (en) * 1999-05-21 2000-11-24 Baelz Gmbh Helmut METHOD AND DEVICE FOR CONTROLLING THE FUNCTIONING OF ADJUSTMENTS IN A THERMAL INSTALLATION
WO2005010415A1 (en) * 2003-07-24 2005-02-03 Alois Schwarz Multiport valve
EP1619453A1 (en) * 2004-07-21 2006-01-25 Robert Bosch Gmbh Warm water heating installation with hydraulic protection circuit and method for operating the same.
EP2613097A1 (en) * 2012-01-09 2013-07-10 Grundfos Holding A/S Heating device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2793899A1 (en) * 1999-05-21 2000-11-24 Baelz Gmbh Helmut METHOD AND DEVICE FOR CONTROLLING THE FUNCTIONING OF ADJUSTMENTS IN A THERMAL INSTALLATION
WO2005010415A1 (en) * 2003-07-24 2005-02-03 Alois Schwarz Multiport valve
EP1619453A1 (en) * 2004-07-21 2006-01-25 Robert Bosch Gmbh Warm water heating installation with hydraulic protection circuit and method for operating the same.
EP2613097A1 (en) * 2012-01-09 2013-07-10 Grundfos Holding A/S Heating device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022144151A1 (en) * 2021-01-04 2022-07-07 Bosch Termoteknik Isitmave Klima Sanayi Ticaret Anonim Sirketi Method for operating a heater and heater for heating a space and/or a flow of drinking water

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