EP3896360B1 - A system for detecting clogging in a heat exchanger - Google Patents

A system for detecting clogging in a heat exchanger Download PDF

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Publication number
EP3896360B1
EP3896360B1 EP21165766.3A EP21165766A EP3896360B1 EP 3896360 B1 EP3896360 B1 EP 3896360B1 EP 21165766 A EP21165766 A EP 21165766A EP 3896360 B1 EP3896360 B1 EP 3896360B1
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Prior art keywords
volume
pipe
flow
measurements
mentioned
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EP21165766.3A
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German (de)
French (fr)
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EP3896360A1 (en
Inventor
Mustafa Pekguzelsu
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Bosch Termoteknik Isitma ve Klima Sanayi Ticaret AS
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Bosch Termoteknik Isitma ve Klima Sanayi Ticaret AS
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Classifications

    • 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
    • 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
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/238—Flow rate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/395—Information to users, e.g. alarms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F24H15/45—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based remotely accessible
    • 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
    • F24D2220/042—Temperature 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
    • F24D2220/04—Sensors
    • F24D2220/044—Flow sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F24H15/421—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data

Definitions

  • Water heaters are connected to a central heating circuit and to a domestic water pipe. They heat the liquid in the central heating circuit and the water in the domestic water pipe.
  • the water in the central heating circuit is introduced into the water heater, heated by a heating cell and returned to the central heating circuit. Heating components such as radiators in the central heating circuit ensure that the rooms are heated.
  • German patent application DE102009042994 discloses a system in which temperature measurements are taken at various locations on the plate heat exchanger and warning signals are generated in order to avoid possible heat damage to the heat exchanger should the temperature measurements exceed a certain threshold.
  • An object of the invention is to provide a system for detecting the blockage in the domestic water pipe of the heat exchanger.
  • a further object of the invention is to provide a system which enables a blockage in the domestic water pipe of the heat exchanger to be resolved earlier than in systems in The state of the art is recognized so that the replacement of the spare part and the visit of the service technician can be planned.
  • the system includes a temperature sensor for measuring the temperature of the liquid in the second line, a counter for detecting the activation or deactivation states of the heating cell, a first flow measuring device for measuring the volume flow of the liquid in the first line, a second flow measuring device for measuring the volume flow of Water in the second line, a control unit which is in communication with the temperature sensor, the first flow measuring device, the second flow measuring device and the meter and thus receives the temperature, flow and status meter measurements.
  • the consumption measuring device is a counter that counts the cycles in which the heating cell is activated and deactivated.
  • a user interface is provided for displaying the generated signal, which is controlled by the control unit.
  • the feature of another possible embodiment of the invention is that the mentioned user interface is provided on the water heater.
  • the feature of another possible embodiment of the invention is that the mentioned user interface is located remotely from the water heater and is connected to the control unit by wire or wireless connection.
  • the mentioned user interface is provided on an electronic terminal and is configured to communicate wirelessly with the control unit. If the terminal is a server, additional information about water heaters is obtained, allowing the replacement of the spare part and the visit of the service technician to be planned, reducing negative impact on the user.
  • control unit is configured to detect the increasing trend when it detects that the beginning and end of a predetermined number of monitored measurements are in a first value range that is above the beginning and end of a normal value range, and to recognize the decreasing trend when it determines that the beginning and end of a predetermined number of monitored measurements are are in a second value range that is below the start and end of a normal value range.
  • Fig. 1 A view of the water heater is shown.
  • FIG. 2 A schematic view of the system is shown.
  • the water heater (100) includes a heat exchanger (150) to enable heat transfer between the heated liquid in the first line (110) and the water in the second line (120) without mixing with each other.
  • the heat exchanger (150) contains a first volume (151) which receives the liquid in the first line (110), a second volume (152) which receives the liquid in the second line (120), and a heat transfer medium (153). for heat transfer between the first volume (151) and the second volume (152).
  • the heat exchanger (150) may be of a type known in the art as a plate type.
  • the innovation in the system (200) according to the invention is to ensure that the blockage in the first volume (151) of the heat exchanger (150) is detected early.
  • the processor unit (211) stores the flow and temperature measurements as well as information on the activation and deactivation status assigned to their reception times in a storage unit (212).
  • the processor unit (211) monitors the measurements and information stored in the memory unit (212).
  • the processor unit (211) generates a signal about the blockage in the second volume (152) when an increasing trend of the temperature measurements received in a first time interval from the temperature sensor (230) is detected when it is determined that the in the first Time interval flow measurements obtained from the first flow measuring device (221) are within a predetermined value range if a decreasing trend is detected in the flow measurements obtained by the second flow measuring device (222), and if an increasing trend in the frequency of activation and deactivation states of the flow measurements from the counter (240 ) information received is determined.
  • the system may also include a user interface (250) associated with the processor unit (211) to ensure that said signal is sent to the user.
  • the mentioned user interface (250) can be provided on the water heater (100).
  • the user interface (250) can be arranged in a room remote from the water heater (100) and can provide wired or wireless data exchange with the processor unit (211).
  • the user interface (250) may be provided on an electronic terminal.
  • the processor unit (211) can exchange data wirelessly with the electronic terminal.
  • the electronic terminal can be a server, a mobile device, a computer, etc. If the terminal is a server, the blockage can be detected in advance by the water heater technical service (100) and spare parts can be obtained so that early action planning can be carried out.

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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)
  • Computer Hardware Design (AREA)
  • Fluid Mechanics (AREA)
  • Water Supply & Treatment (AREA)
  • Measuring Volume Flow (AREA)

Description

TECHNISCHES GEBIETTECHNICAL FIELD

Die Erfindung betrifft ein System zur Erkennung einer Verstopfung im zweiten Volumen des Wärmetauschers in einem Wasserheizer, der eine erste Leitung, die hydraulisch mit einem Zentralheizkreislauf verbunden ist, und eine zweite Leitung, die hydraulisch mit einer Hauswasserleitung verbunden ist, eine Heizzelle, die mit der erwähnten ersten Leitung zur Erwärmung der Flüssigkeit in der erwähnten ersten Leitung verbunden ist, ein erstes Volumen, das hydraulisch mit der ersten Leitung verbunden ist, und ein zweites Volumen, das hydraulisch mit der erwähnten zweiten Leitung verbunden ist, mindestens ein Wärmeübertragungsmittel, das zwischen dem erwähnten ersten Volumen und dem erwähnten zweiten Volumen vorgesehen ist, einen Wärmetauscher zur Wärmeübertragung zwischen der ersten Leitung und der zweiten Leitung, umfasst.The invention relates to a system for detecting a blockage in the second volume of the heat exchanger in a water heater, which has a first line which is hydraulically connected to a central heating circuit and a second line which is hydraulically connected to a domestic water pipe, a heating cell which is connected to the mentioned first conduit for heating the liquid in said first conduit, a first volume hydraulically connected to the first conduit, and a second volume hydraulically connected to said second conduit, at least one heat transfer medium connected between the mentioned first volume and the mentioned second volume is provided, a heat exchanger for heat transfer between the first line and the second line.

STAND DER TECHNIKSTATE OF THE ART

Wasserheizer, insbesondere Kombi-Wasserheizer, sind an einen Zentralheizkreislauf und an eine Hauswasserleitung angeschlossen. Sie sorgen für die Erwärmung der Flüssigkeit im Zentralheizkreislauf und des Wassers in der Hauswasserleitung. Das Wasser in dem Zentralheizkreislauf wird in den Wasserheizer eingeleitet, durch eine Heizzelle erwärmt und wieder in den Zentralheizkreislauf zurückgeleitet. Durch Heizkomponenten wie Heizkörper im Zentralheizkreislauf wird dafür gesorgt, dass die Räume geheizt werden.Water heaters, especially combination water heaters, are connected to a central heating circuit and to a domestic water pipe. They heat the liquid in the central heating circuit and the water in the domestic water pipe. The water in the central heating circuit is introduced into the water heater, heated by a heating cell and returned to the central heating circuit. Heating components such as radiators in the central heating circuit ensure that the rooms are heated.

Das Wasser in der Hauswasserleitung wird dadurch erwärmt, dass zwischen dem Wasser aus dem Zentralheizkreislauf nach dessen Erhitzen und dem Wasser aus der Hauswasserleitung anhand eines Wärmetauschers eine Wärmeübertragung durchgeführt wird. Der Wärmetauscher enthält ein erstes Volumen, durch welches das Wasser aus dem Zentralheizkreislauf fließt, und ein zweites Volumen, durch welches das Wasser der Hauswasserleitung fließt. Das erste Volumen und das zweite Volumen tauschen Wärme über ein Wärmeübertragungsmittel aus. Dabei erfolgt eine Wärmeübertragung aus dem durch eine Heizzelle erwärmten Wasser in dem ersten Volumen des Zentralheizkreislaufes auf das Wasser in dem zweiten Volumen der Hauswasserleitung.The water in the domestic water pipe is heated by heat transfer being carried out between the water from the central heating circuit after it has been heated and the water from the domestic water pipe using a heat exchanger. The heat exchanger contains a first volume through which the water from the central heating circuit flows and a second volume through which the water from the domestic water pipe flows. The first volume and the second volume exchange heat via a heat transfer medium. Heat is transferred from the water heated by a heating cell in the first volume of the central heating circuit to the water in the second volume of the domestic water pipe.

Sollte in der Hauswasserleitung des Wärmetauschers eine Verstopfung vorkommen, würde das Wasser sich langsam vorwärts bewegen, was dazu führt, dass das Wasser in der Hauswasserleitung überhitzt wird und aus den Wasserhähnen nicht mit ausreichend hohem Durchfluss fließt. Dies führt dazu, dass der Komfort der Benutzer negativ beeinflusst wird. Die Verstopfung kann mit der Zeit zu einer Beschädigung des Wärmetauschers führen und einen Flüssigkeitsfluss aus dem Zentralheizkreislauf in die Hauswasserleitung verursachen.Should there be a blockage in the heat exchanger's domestic water pipe, the water would move forward slowly, causing the water in the domestic water pipe to overheat and not flow from the faucets at a sufficiently high flow rate. This results in the comfort of users being negatively affected. Over time, the blockage can cause damage to the heat exchanger and cause a flow of fluid from the central heating circuit into the domestic water pipe.

In der deutschen Patentanmeldung DE102009042994 wird ein System offenbart, in dem an verschiedenen Stellen des Plattenwärmetauschers Temperaturmessungen durchgeführt und Warnsignale erzeugt werden, um mögliche Schäden des Wärmetauschers durch Hitze zu vermeiden, falls die Temperaturmessungen einen bestimmten Schwellenwert überschreiten sollten.In the German patent application DE102009042994 discloses a system in which temperature measurements are taken at various locations on the plate heat exchanger and warning signals are generated in order to avoid possible heat damage to the heat exchanger should the temperature measurements exceed a certain threshold.

Die US 2018/073749 A1 offenbart ein Kombinationsheizgerät zur Bereitstellung erwärmten Wassers an einen Heizkreis und von Trinkwarmwasser an einen Trinkwasserkreis, umfassend einen Sekundärwärmeübertrager zum Übertragen von Wärme aus dem Heizkreis auf den Trinkwasserkreis. Das Kombinationsheizgerät umfasst einen Controller zum Auslösen eines Vorwärmbetriebs des Sekundärwärmeübertragers.The US 2018/073749 A1 discloses a combination heater for providing heated water to a heating circuit and hot drinking water to a drinking water circuit, comprising a secondary heat exchanger for transferring heat from the heating circuit to the drinking water circuit. The combination heater includes a controller for triggering a preheating operation of the secondary heat exchanger.

Letztlich führen alle oben erwähnten Probleme zur Notwendigkeit einer Neuerung auf dem relevanten technischen Gebiet.Ultimately, all of the above-mentioned problems lead to the need for innovation in the relevant technical field.

KURZE BESCHREIBUNG DER ERFINDUNGBRIEF DESCRIPTION OF THE INVENTION

Die vorliegende Erfindung betrifft ein System zur Beseitigung der oben erwähnten Nachteile und zur Erkennung von Verstopfungen in einem Wärmetauscher, um neue Vorteile auf dem relevanten technischen Gebiet zu erzielen.The present invention relates to a system for eliminating the above-mentioned disadvantages and detecting clogging in a heat exchanger to achieve new advantages in the relevant technical field.

Eine Aufgabe der Erfindung ist es ein System bereitzustellen, um die Verstopfung in der Hauswasserleitung des Wärmetauschers zu erkennen.An object of the invention is to provide a system for detecting the blockage in the domestic water pipe of the heat exchanger.

Eine weitere Aufgabe der Erfindung ist es ein System bereitzustellen, das ermöglicht, dass eine Verstopfung in der Hauswasserleitung des Wärmetauschers früher als in Systemen im Stand der Technik erkannt wird und so der Austausch des Ersatzteils sowie der Besuch des Servicetechnikers geplant werden können.A further object of the invention is to provide a system which enables a blockage in the domestic water pipe of the heat exchanger to be resolved earlier than in systems in The state of the art is recognized so that the replacement of the spare part and the visit of the service technician can be planned.

Um alle oben erwähnten und sich aus der nachstehenden detaillierten Beschreibung ergebenden Aufgaben zu erfüllen, betrifft die vorliegende Erfindung ein System zur Erkennung einer Verstopfung im erwähnten Wärmetauscher in einem Wasserheizer, wobei das System den Wasserheizer aufweist, der eine erste Leitung, die hydraulisch mit einem Zentralheizkreislauf verbindbar ist, und eine zweite Leitung, die hydraulisch mit einer Hauswasserleitung verbindbar ist, eine Heizzelle, die mit der ersten Leitung zur Erwärmung der Flüssigkeit in der erwähnten ersten Leitung verbunden ist, ein erstes Volumen, das hydraulisch mit der ersten Leitung verbunden ist, und ein zweites Volumen, das hydraulisch mit der erwähnten zweiten Leitung verbunden ist, mindestens ein Wärmeübertragungsmittel, das zwischen dem erwähnten ersten Volumen und dem erwähnten zweiten Volumen vorgesehen ist, wobei das mindestens eine Wärmeübertragungsmittel, das erste Volumen und das zweie Volumen einen Wärmetauscher zur Wärmeübertragung zwischen der ersten Leitung und der zweiten Leitung bilden, umfasst. Das System umfasst einen Temperatursensor zur Messung der Temperatur der Flüssigkeit in der zweiten Leitung, einen Zähler zur Erfassung der Aktivierungs- oder Deaktivierungszustände der Heizzelle, eine erste Durchflussmesseinrichtung zur Messung des Volumenstroms der Flüssigkeit in der ersten Leitung, eine zweite Durchflussmesseinrichtung zur Messung des Volumenstroms von Wasser in der zweiten Leitung, eine Steuereinheit, welche mit dem Temperatursensor, der ersten Durchflussmesseinrichtung, der zweiten Durchflussmesseinrichtung und dem Zähler in Verbindung steht und somit die Temperatur-, Durchfluss- und Zustandszählermessungen empfängt.In order to achieve all the objects mentioned above and resulting from the detailed description below, the present invention relates to a system for detecting a blockage in the mentioned heat exchanger in a water heater, the system comprising the water heater having a first pipe hydraulically connected to a central heating circuit is connectable, and a second line that is hydraulically connectable to a domestic water line, a heating cell that is connected to the first line for heating the liquid in the mentioned first line, a first volume that is hydraulically connected to the first line, and a second volume hydraulically connected to said second conduit, at least one heat transfer means provided between said first volume and said second volume, wherein the at least one heat transfer means, the first volume and the second volume include a heat exchanger for heat transfer between the first line and the second line form, includes. The system includes a temperature sensor for measuring the temperature of the liquid in the second line, a counter for detecting the activation or deactivation states of the heating cell, a first flow measuring device for measuring the volume flow of the liquid in the first line, a second flow measuring device for measuring the volume flow of Water in the second line, a control unit which is in communication with the temperature sensor, the first flow measuring device, the second flow measuring device and the meter and thus receives the temperature, flow and status meter measurements.

Es wird vorgeschlagen, die Steuereinheit derart zu konfigurieren, dass sie die Informationen über die empfangenen Temperaturmessungen, Durchflussmessungen sowie die Aktivierungs- und Deaktivierungszustände den Empfangszeiten zuordnet und in einer Speichereinheit aufzeichnet,
und

  • dass die aufgezeichneten Temperaturmessungen, Durchflussmessungen und Informationen über die Aktivierungszustände überwacht werden,
  • dass ein Signal bezüglich einer Verstopfung im zweiten Volumen des Wärmetauschers erzeugt wird, wenn in einem ersten Zeitintervall ein Zunahmetrend der Temperaturmessungen aus dem Temperatursensor erkannt wird, wenn festgestellt wird, dass in dem erwähnten ersten Zeitintervall die von der ersten Durchflussmesseinrichtung erhaltenen Durchflussmessungen innerhalb eines vorbestimmten Wertebereichs liegen, wenn im ersten Zeitintervall ein Abnahmetrend in den von der zweiten Durchflussmesseinrichtung erhaltenen Durchflussmessungen festgestellt wird, und wenn im ersten Zeitintervall ein Zunahmetrend in der Häufigkeit von Informationen vom Zähler über den Aktivierungs- und Deaktivierungszustand festgestellt wird. Somit wird die Verstopfung in der Hauswasserleitung des Wärmetauschers erkannt und verhindert, dass der Benutzer übermäßig heißem Wasser ausgesetzt wird.
It is proposed to configure the control unit in such a way that it assigns the information about the received temperature measurements, flow measurements as well as the activation and deactivation states to the reception times and records it in a storage unit,
and
  • that the recorded temperature measurements, flow measurements and information about the activation states are monitored,
  • that a signal regarding a blockage in the second volume of the heat exchanger is generated when an increasing trend in the temperature measurements from the temperature sensor is detected in a first time interval, when it is determined that in the mentioned first time interval the flow from the first flow measuring device obtained flow measurements are within a predetermined value range if a decreasing trend in the flow measurements obtained by the second flow measuring device is detected in the first time interval, and if an increasing trend in the frequency of information from the meter about the activation and deactivation state is detected in the first time interval. Thus, the blockage in the heat exchanger's domestic water pipe is detected and prevents the user from being exposed to excessively hot water.

Das Merkmal einer möglichen Ausführungsform der Erfindung ist, dass die Verbrauchsmesseinrichtung ein Zähler ist, der die Zyklen zählt, in denen die Heizzelle aktiviert und deaktiviert ist.The feature of a possible embodiment of the invention is that the consumption measuring device is a counter that counts the cycles in which the heating cell is activated and deactivated.

Das Merkmal einer anderen möglichen Ausführungsform der Erfindung ist, dass eine Benutzerschnittstelle zur Darstellung des erzeugten Signals vorgesehen ist, die von der Steuereinheit gesteuert wird.The feature of another possible embodiment of the invention is that a user interface is provided for displaying the generated signal, which is controlled by the control unit.

Das Merkmal einer anderen möglichen Ausführungsform der Erfindung ist, dass die erwähnte Benutzerschnittstelle an dem Wasserheizer vorgesehen ist.The feature of another possible embodiment of the invention is that the mentioned user interface is provided on the water heater.

Das Merkmal einer anderen möglichen Ausführungsform der Erfindung ist, dass die erwähnte Benutzerschnittstelle vom Wasserheizer entfernt angeordnet und drahtgebunden oder drahtlos mit der Steuereinheit verbunden ist.The feature of another possible embodiment of the invention is that the mentioned user interface is located remotely from the water heater and is connected to the control unit by wire or wireless connection.

Das Merkmal einer anderen möglichen Ausführungsform der Erfindung ist, dass die erwähnte Benutzerschnittstelle auf einem elektronischen Terminal vorgesehen, und derart konfiguriert ist, dass sie drahtlos mit der Steuereinheit kommuniziert. Wenn es sich beim Terminal um einen Server handelt, werden zusätzliche Informationen über Wasserheizer erhalten, wodurch ermöglicht wird, dass der Austausch des Ersatzteils sowie der Besuch des Servicetechnikers geplant werden können und negative Auswirkungen auf den Benutzer reduziert werden.The feature of another possible embodiment of the invention is that the mentioned user interface is provided on an electronic terminal and is configured to communicate wirelessly with the control unit. If the terminal is a server, additional information about water heaters is obtained, allowing the replacement of the spare part and the visit of the service technician to be planned, reducing negative impact on the user.

Das Merkmal einer anderen möglichen Ausführungsform der Erfindung ist, dass die Steuereinheit derart konfiguriert ist, den Zunahmetrend zu erkennen, wenn sie feststellt, dass sich der Anfang und das Ende einer vorgegebenen Anzahl überwachter Messungen in einem ersten Wertbereich befinden, der über dem Anfang und Ende eines normalen Wertbereichs liegt, und den Abnahmetrend zu erkennen, wenn sie feststellt, dass sich der Anfang und das Ende einer vorgegebenen Anzahl überwachter Messungen in einem zweiten Wertbereich befinden, der unter dem Anfang und Ende eines normalen Wertbereichs liegt.The feature of another possible embodiment of the invention is that the control unit is configured to detect the increasing trend when it detects that the beginning and end of a predetermined number of monitored measurements are in a first value range that is above the beginning and end of a normal value range, and to recognize the decreasing trend when it determines that the beginning and end of a predetermined number of monitored measurements are are in a second value range that is below the start and end of a normal value range.

KURZE BESCHREIBUNG DER FIGURENBRIEF DESCRIPTION OF THE FIGURES

In Fig. 1 ist eine Ansicht des Wasserheizers dargestellt.In Fig. 1 A view of the water heater is shown.

In Fig. 2 ist eine schematische Ansicht des Systems dargestellt.In Fig. 2 A schematic view of the system is shown.

DETAILLIERTE BESCHREIBUNG DER ERFINDUNGDETAILED DESCRIPTION OF THE INVENTION

In dieser detaillierten Beschreibung wird der Gegenstand der Erfindung anhand von Beispielen erläutert, die lediglich dem besseren Verständnis des Gegenstands dienen und nicht einschränkend sind.In this detailed description, the subject matter of the invention is explained using examples which serve only to better understand the subject matter and are not limiting.

Bei der Erfindung handelt es sich um ein System (200) zur Erkennung der Verstopfung im Wärmetauscher (150) in Wasserheizern (100). Bezugnehmend auf Fig.1 enthält der Wasserheizer (100) eine erste Leitung (110), die hydraulisch mit einem Zentralheizkreislauf (310) verbunden ist, sowie eine zweite Leitung (120), die hydraulisch mit der Hauswasserleitung verbunden ist. Die in dem Zentralheizkreislauf (310) zirkulierende Flüssigkeit tritt in die ersten Leitung (110) ein, tritt nach dem Erhitzen wieder aus und wird wieder in den Zentralheizkreislauf (310) eingeführt. Das Leitungswasser, das aus einer Leitung wie der städtischen Wasserversorgung stammt, tritt in die zweite Leitung (120) ein und wird nach dem Erhitzen in die Hauswasserleitung eingeführt, damit Verbraucher es über Komponenten wie Wasserhähne u.Ä. nutzen können. Die Flüssigkeit in der erwähnten ersten Leitung (110) kann Wasser oder eine andere Flüssigkeit sein, die zu Heizzwecken verwendet wird.The invention is a system (200) for detecting blockages in the heat exchanger (150) in water heaters (100). Referring to Fig.1 the water heater (100) contains a first line (110), which is hydraulically connected to a central heating circuit (310), and a second line (120), which is hydraulically connected to the domestic water pipe. The liquid circulating in the central heating circuit (310) enters the first line (110), exits again after heating and is reintroduced into the central heating circuit (310). The tap water, which comes from a pipe such as the municipal water supply, enters the second pipe (120) and, after being heated, is introduced into the domestic water pipe for consumers to use it through components such as faucets and the like. The liquid in the mentioned first line (110) can be water or another liquid used for heating purposes.

Der Wasserheizer (100) enthält eine Heizzelle (130) zum Erhitzen der Flüssigkeit in der ersten Leitung (110). Die erwähnte Heizzelle (130) gibt durch den Verbrauch von Energieelementen wie Strom, Gas u. Ä. Wärme ab. Die Heizzelle (130) kann durch thermostatartige Elemente oder eine Steuereinheit (210) gesteuert werden. Mit anderen Worten können die Zyklen, in denen die Heizzelle (130) aktiviert und deaktiviert ist, von diesen Komponenten gesteuert werden. Zum Beispiel kann die Steuereinheit (210) je nach der Wassertemperatur in der Hauswasserleitung (120) die Heizzelle (130) einschalten oder ausschalten.The water heater (100) contains a heating cell (130) for heating the liquid in the first line (110). The mentioned heating cell (130) produces energy through the consumption of energy elements such as electricity, gas, etc. Heat off. The heating cell (130) can be controlled by thermostat-like elements or a control unit (210). In other words, the cycles in which the heating cell (130) is activated and deactivated can vary from these components can be controlled. For example, the control unit (210) can switch the heating cell (130) on or off depending on the water temperature in the domestic water pipe (120).

Die erste Leitung (110) kann auch eine Pumpe (140) zum Bewegen der Flüssigkeit enthalten.The first line (110) may also contain a pump (140) for moving the liquid.

Der Wasserheizer (100) enthält einen Wärmetauscher (150), um eine Wärmeübertragung zwischen der erwärmten Flüssigkeit in der ersten Leitung (110) und dem Wasser in der zweiten Leitung (120) zu ermöglichen, ohne dass diese sich miteinander vermischen. Der Wärmetauscher (150) enthält ein erstes Volumen (151), das die Flüssigkeit in der ersten Leitung (110) aufnimmt, ein zweites Volumen (152), das die Flüssigkeit in der zweiten Leitung (120) aufnimmt, und ein Wärmeübertragungsmittel (153) zur Wärmeübertragung zwischen dem ersten Volumen (151) und dem zweiten Volumen (152). Der Wärmetauscher (150) kann von einem Typ sein, der im Stand der Technik als Plattentyp bekannt ist. Die Neuerung in dem erfindungsgemäßen System (200) besteht darin, dafür zu sorgen, dass die Verstopfung in dem ersten Volumen (151) des Wärmetauschers (150) früh erkannt wird.The water heater (100) includes a heat exchanger (150) to enable heat transfer between the heated liquid in the first line (110) and the water in the second line (120) without mixing with each other. The heat exchanger (150) contains a first volume (151) which receives the liquid in the first line (110), a second volume (152) which receives the liquid in the second line (120), and a heat transfer medium (153). for heat transfer between the first volume (151) and the second volume (152). The heat exchanger (150) may be of a type known in the art as a plate type. The innovation in the system (200) according to the invention is to ensure that the blockage in the first volume (151) of the heat exchanger (150) is detected early.

Bezugnehmend auf Fig. 1 und 2 umfasst das erfindungsgemäße System (200) eine erste Durchflussmesseinrichtung (221) zur Messung des Volumenstroms der Flüssigkeit in der ersten Leitung (110). Die erwähnte erste Durchflussmesseinrichtung (221) kann ein Durchflusssensor sein. Das System (200) umfasst eine zweite Durchflussmesseinrichtung (222) zur Messung der Volumenstromschnelligkeit der Flüssigkeit in der zweiten Leitung (120). Das System (200) umfasst einen Temperatursensor (230) zur Messung der Temperatur der Flüssigkeit in der zweiten Leitung (120), die den Wärmetauscher (150) verlässt. Das System (200) umfasst einen Zähler (240) zur Erfassung der Aktivierungs- oder Deaktivierungszustände der Heizzelle (130). Der erwähnte Zähler (240) kann, zum Beispiel wenn die Heizzelle (130) aktiviert und deaktiviert ist, ein Signal erzeugen, wobei in dem aktivierten Zustand in Abhängigkeit von dem Lastverhältnis, in dem es arbeitet, ein anderes Signal erzeugt werden kann.Referring to Fig. 1 and 2 the system (200) according to the invention comprises a first flow measuring device (221) for measuring the volume flow of the liquid in the first line (110). The first flow measuring device (221) mentioned can be a flow sensor. The system (200) comprises a second flow measuring device (222) for measuring the volume flow rate of the liquid in the second line (120). The system (200) includes a temperature sensor (230) for measuring the temperature of the liquid in the second line (120) that leaves the heat exchanger (150). The system (200) comprises a counter (240) for recording the activation or deactivation states of the heating cell (130). The mentioned counter (240) can generate a signal, for example when the heating cell (130) is activated and deactivated, and in the activated state a different signal can be generated depending on the load ratio in which it operates.

Das System umfasst eine Steuereinheit (210) und eine Prozessoreinheit (211), welche von der ersten Durchflussmesseinrichtung (221), der zweiten Durchflussmesseinrichtung (222), dem Temperatursensor (230) und dem Zähler (240) die Durchfluss-, Temperaturmessungen sowie Informationen zum Aktivierungs- und Deaktivierungszustand empfängt. Die erwähnte Steuereinheit (210) umfasst eine Speichereinheit (212), die der Prozessoreinheit (211) derart zugeordnet ist, dass die Prozessoreinheit (211) die Daten lesen und schreiben kann. Die Prozessoreinheit (211) kann ein Mikroprozessor sein.The system comprises a control unit (210) and a processor unit (211), which take the flow and temperature measurements from the first flow measuring device (221), the second flow measuring device (222), the temperature sensor (230) and the counter (240). as well as information about the activation and deactivation status. The mentioned control unit (210) comprises a memory unit (212) which is assigned to the processor unit (211) in such a way that the processor unit (211) can read and write the data. The processor unit (211) can be a microprocessor.

Die Prozessoreinheit (211) speichert die Durchfluss-, und Temperaturmessungen sowie Informationen zum Aktivierungs- und Deaktivierungszustand zugeordnet zu ihren Empfangszeiten in einer Speichereinheit (212).The processor unit (211) stores the flow and temperature measurements as well as information on the activation and deactivation status assigned to their reception times in a storage unit (212).

Im Falle einer Verstopfung im zweiten Volumen (152) des Wärmetauschers (150) wird die Flüssigkeit im zweiten Volumen (152) sich langsamer bewegen und der erhitzten Flüssigkeit im ersten Volumen (151) mehr ausgesetzt, weshalb die Temperatur schneller steigt. Da ein übermäßiger Temperaturanstieg dazu führt, dass die Heizzelle (130) häufiger eingeschaltet und ausgeschaltet wird, würde die Anzahl der Aktivierungen und Deaktivierungen der Heizzelle (130) zunehmen. Da im ersten Volumen (151) keine Verstopfung besteht, wird der Durchfluss der Flüssigkeit in der ersten Leitung nicht beeinflusst.In the event of a blockage in the second volume (152) of the heat exchanger (150), the liquid in the second volume (152) will move slower and be more exposed to the heated liquid in the first volume (151), therefore the temperature will rise faster. Since excessive temperature rise causes the heater cell (130) to be turned on and off more frequently, the number of activations and deactivations of the heater cell (130) would increase. Since there is no blockage in the first volume (151), the flow of liquid in the first line is not affected.

Demnach überwacht die Prozessoreinheit (211) die Messungen und Informationen, die in der Speichereinheit (212) gespeichert sind. Als Neuerungsaspekt der Erfindung erzeugt die Prozessoreinheit (211) ein Signal über die Verstopfung im zweiten Volumen (152), wenn ein Zunahmetrend der in einem ersten Zeitintervall aus dem Temperatursensor (230) empfangenen Temperaturmessungen erkannt wird, wenn festgestellt wird, dass die in dem ersten Zeitintervall von der ersten Durchflussmesseinrichtung (221) erhaltenen Durchflussmessungen innerhalb eines vorbestimmten Wertebereichs liegen, wenn ein Abnahmetrend in den von der zweiten Durchflussmesseinrichtung (222) erhaltenen Durchflussmessungen festgestellt wird, und wenn ein Zunahmetrend in der Häufigkeit der Aktivierungs- und Deaktivierungszustände der vom Zähler (240) erhaltenen Informationen festgestellt wird.Accordingly, the processor unit (211) monitors the measurements and information stored in the memory unit (212). As an innovative aspect of the invention, the processor unit (211) generates a signal about the blockage in the second volume (152) when an increasing trend of the temperature measurements received in a first time interval from the temperature sensor (230) is detected when it is determined that the in the first Time interval flow measurements obtained from the first flow measuring device (221) are within a predetermined value range if a decreasing trend is detected in the flow measurements obtained by the second flow measuring device (222), and if an increasing trend in the frequency of activation and deactivation states of the flow measurements from the counter (240 ) information received is determined.

Die Prozessoreinheit (211) erkennt den Zunahmetrend und den Abnahmetrend beispielhaft wie folgt, ohne einschränkend zu wirken: Die Prozessoreinheit (211) erkennt den Zunahmetrend, wenn sie feststellt, dass sich die Anfangswerte und Endwerte einer vorgegebenen Anzahl überwachter Messungen in einem ersten Wertbereich befinden, welcher der Reihe nach über den Anfangswerten und Endwerten eines normalen Wertbereichs liegt, erkennt den Abnahmetrend, wenn sie feststellt, dass sich die Anfangswerte und Endwerte einer vorgegebenen Anzahl überwachter Messungen in einem ersten Wertbereich befinden, welcher der Reihe nach unter dem Anfang und Ende eines normalen Wertbereichs liegt. Als Alternative kann der Zunahmetrend erkannt werden, wenn festgestellt wird, dass die Mehrzahl der aufeinanderfolgenden Messungen entsprechend der Zeit zunimmt, und dass sie über bestimmten Schwellenwerten liegt; der Abnahmetrend kann erkannt werden, wenn festgestellt wird, dass die Mehrzahl der aufeinanderfolgenden Messungen abnimmt, und dass sie unter bestimmten Schwellenwerten liegt. In einer möglichen Ausführung kann der Zunahme- oder Abnahmetrend durch Berücksichtigung der in bestimmten Intervallen beobachteten Maximal- und/oder Minimalwerte erkannt werden. Der Zunahmetrend im Aktivierungs- und Deaktivierungszustand kann durch Beobachtung der Zunahme der Häufigkeit von Aktivierungs- und Deaktivierungszuständen in einem bestimmten Zeitraum erkannt werden.The processor unit (211) recognizes the increase trend and the decrease trend as follows, for example, without having a restrictive effect: The processor unit (211) recognizes the increase trend when it determines that the initial values and end values of a predetermined number of monitored measurements are in a first value range, which in turn above the initial values and final values of a normal Value range, recognizes the decreasing trend when it determines that the initial values and final values of a predetermined number of monitored measurements are in a first value range, which is sequentially below the start and end of a normal value range. Alternatively, the increasing trend can be recognized when it is determined that the majority of consecutive measurements are increasing with time and are above certain thresholds; the decreasing trend can be recognized when the majority of consecutive measurements are found to be decreasing and to be below certain threshold values. In one possible embodiment, the increasing or decreasing trend can be recognized by taking into account the maximum and/or minimum values observed at certain intervals. The increasing trend in activation and deactivation states can be recognized by observing the increase in the frequency of activation and deactivation states in a certain period of time.

Das System kann auch eine der Prozessoreinheit (211) zugeordnete Benutzerschnittstelle (250) umfassen, um zu gewährleisten, dass das genannte Signal an den Benutzer gesendet wird. Die erwähnte Benutzerschnittstelle (250) kann an dem Wasserheizer (100) vorgesehen sein. Die Benutzerschnittstelle (250) kann in einer möglichen Ausführungsform in einem vom Wasserheizer (100) entfernten Raum angeordnet sein und drahtgebunden oder drahtlos für Datenaustausch mit der Prozessoreinheit (211) sorgen. In einer möglichen Ausführungsform kann die Benutzerschnittstelle (250) auf einem elektronischen Terminal vorgesehen sein. Die Prozessoreinheit (211) kann die Daten drahtlos mit dem elektronischen Terminal austauschen. Das elektronische Terminal kann ein Server, ein mobiles Gerät, ein Computer usw. sein. Falls es sich beim Terminal um einen Server handelt, kann die Verstopfung vom Technik-Service des Wasserheizers (100) im Voraus erkannt und Ersatzteile besorgt werden, so dass eine frühe Maßnahmenplanung vorgenommen werden kann.The system may also include a user interface (250) associated with the processor unit (211) to ensure that said signal is sent to the user. The mentioned user interface (250) can be provided on the water heater (100). In one possible embodiment, the user interface (250) can be arranged in a room remote from the water heater (100) and can provide wired or wireless data exchange with the processor unit (211). In one possible embodiment, the user interface (250) may be provided on an electronic terminal. The processor unit (211) can exchange data wirelessly with the electronic terminal. The electronic terminal can be a server, a mobile device, a computer, etc. If the terminal is a server, the blockage can be detected in advance by the water heater technical service (100) and spare parts can be obtained so that early action planning can be carried out.

Der Schutzumfang der Erfindung ist in den Ansprüchen in der Anlage angegeben und kann nicht auf das beschränkt werden, was in dieser detaillierten Beschreibung zum Zweck der Angabe von Beispielen erläutert wird. Es ist offensichtlich, dass der Fachmann auf dem technischen Gebiet im Lichte der obigen Erläuterungen ähnliche Ausführungsformen erstellen kann.The scope of the invention is indicated in the appended claims and cannot be limited to what is explained in this detailed description for the purpose of giving examples. It is obvious that those skilled in the art can create similar embodiments in light of the above explanations.

DIE IN DEN FIGUREN ANGEGEBENEN BEZUGSZEICHENTHE REFERENCE NUMBERS INDICATED IN THE FIGURES

  • 100 Wasserheizer100 water heaters
  • 110 Erste Leitung110 First line
  • 120 Zweite Leitung120 Second line
  • 130 Heizzelle130 heating cell
  • 140 Pumpe140 pump
  • 150 Wärmetauscher150 heat exchangers
  • 151 Erstes Volumen151 First volume
  • 152 Zweites Volumen152 Second volume
  • 153 Wärmeübertragungsmittel153 Heat Transfer Agents
  • 200 System200 system
  • 210 Steuereinheit210 control unit
  • 211 Prozessoreinheit211 processor unit
  • 212 Speichereinheit212 storage unit
  • 221 Erste Durchflussmesseinrichtung221 First flow measuring device
  • 222 Zweite Durchflussmesseinrichtung222 Second flow measuring device
  • 230 Temperatursensor230 temperature sensor
  • 240 Zähler240 counters
  • 250 Benutzerschnittstelle250 user interface
  • 310 Zentralheizkreislauf310 central heating circuit
  • 320 Hauswasserleitung320 domestic water pipe

Claims (7)

  1. System (200) for detecting a blockage in a heat exchanger (150) in a water heater (100), wherein the system comprises the water heater (100), which comprises a first pipe (110), which is able to be connected hydraulically to a central heating circuit (310), and a second pipe (120), which is able to be connected hydraulically to a domestic water pipe (320), a heating cell (130), which is connected to the mentioned first pipe (110) to heat the liquid in the first pipe (110), a first volume (151), which is connected hydraulically to the first pipe (110), and a second volume (152), which is connected hydraulically to the mentioned second pipe (120), at least one heat transfer means (153), which is provided between the mentioned first volume (151) and the mentioned second volume (152), wherein the at least one heat transfer means (153), the first volume (151) and the second volume (152) form a heat exchanger (150) to transfer heat between the first pipe (110) and the second pipe (120), wherein the system (200) comprises a temperature sensor (230) to measure the temperature of the liquid in the second pipe (120), a meter (240) to record the activation and deactivation states of the mentioned heating cell (130), a first flow measuring device (221) to measure the volume flow of the liquid in the first pipe (110), a second flow measuring device (222) to measure the volume flow of water in the second pipe (120), a control unit (210), which is connected to the temperature sensor (230), the first flow measuring device (221), the second flow measuring device (222) and the meter (240) and therefore receives the temperature, flow and state meter measurements,
    characterized in that the control unit (210) is configured in such a way that it assigns the received temperature measurements, flow measurements and the information about activation and deactivation states to the reception times thereof and stores them in a memory unit (212), and
    - in that the stored temperature measurements, flow measurements and information about the activation states are monitored,
    - in that a signal about the blockage in the second volume (152) of the heat exchanger (150) is generated if an upward trend in the temperature measurements from the temperature sensor (230) is detected in a first time interval, if it is determined that the flow measurements obtained from the first flow measuring device (221) are within a predetermined range of values in the mentioned first time interval, if a downward trend in the flow measurements obtained from the second flow measuring device (221) is determined in the first time interval, and if an upward trend in the frequency of information from the meter (240) about the activation and deactivation states is determined in the first time interval.
  2. System (200) according to Claim 1, characterized in that the mentioned consumption measuring device is a meter (240) that counts the cycles in which the heating cell (130) is activated and deactivated.
  3. System (200) according to Claim 1, characterized in that it contains a user interface (250) to provide the generated signal, said user interface being controlled by the control unit (210).
  4. System (200) according to Claim 3, characterized in that the mentioned user interface (250) is provided on the water heater (100).
  5. System (200) according to Claim 3, characterized in that the mentioned user interface (250) is arranged remotely from the water heater (100) and is connected by wire or wirelessly to the control unit (210).
  6. System (200) according to Claim 3, characterized in that the mentioned user interface (250) is provided on an electronic terminal, and is configured in such a way that it communicates wirelessly with the control unit (210) .
  7. System (200) according to Claim 1, characterized in that the control unit (210) is configured in such a way as to detect the upward trend if it determines that the start and end of a predefined number of monitored measurements are in a first range of values that is above the start and end of a normal range of values, and to detect the downward trend if it determines that the start and end of a predefined number of monitored measurements are in a second range of values that is below the start and end of a normal range of values.
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