EP2280230B1 - Method for monitoring the contamination of a heat exchanger on a heater - Google Patents

Method for monitoring the contamination of a heat exchanger on a heater Download PDF

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Publication number
EP2280230B1
EP2280230B1 EP10006935.0A EP10006935A EP2280230B1 EP 2280230 B1 EP2280230 B1 EP 2280230B1 EP 10006935 A EP10006935 A EP 10006935A EP 2280230 B1 EP2280230 B1 EP 2280230B1
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EP
European Patent Office
Prior art keywords
hot water
monitoring
heat exchanger
contamination
state
Prior art date
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EP10006935.0A
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German (de)
French (fr)
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EP2280230A3 (en
EP2280230A2 (en
Inventor
Huu-Thoi Dr. Le
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Viessmann Werke GmbH and Co KG
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Viessmann Werke GmbH and Co KG
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • 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
    • F24D19/0092—Devices for preventing or removing corrosion, slime or scale
    • 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
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/144—Measuring or calculating energy consumption
    • 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
    • F24H15/36—Control of heat-generating means in heaters of burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers

Definitions

  • the invention relates to a method for monitoring the soiling state of a heat exchanger according to the preamble of claim 1.
  • a method for monitoring the soiling state of a heat exchanger is out DD 292963 A5 known.
  • a soiling state is detected when the hot water temperature at a heat exchanger is less than a predetermined hot water target temperature.
  • a method for monitoring the state of soiling of a heat exchanger for hot water to a heater is after the DE 43 09 313 A1 known.
  • a series of temperature sensors provided on the heating system and a pump speed sensor are used to detect a fouling condition (for example, calcification) of the heat exchanger.
  • a fouling condition for example, calcification
  • the invention has for its object to improve a method of the type mentioned, in particular to the effect that no original operating data must be detected.
  • the monitoring takes place during and after a predetermined minimum duration of hot water preparation and that a contamination state is detected when the power of the heater fluctuates beyond a predetermined amount and at the same time the hot water actual temperature at the heat exchanger smaller than a predetermined hot water Target temperature is.
  • FIG. 1 an embodiment of a heater 2 is shown, in which the inventive method for monitoring the contamination state of a heat exchanger 1 for hot water preparation is feasible.
  • the heater 2 shown is a wall-mounted heater in which the heat exchanger to be monitored 1 is designed as a plate heat exchanger.
  • the heater 2 has a provided with a gas connection 9 burner 3, which is associated with a further heat exchanger 6 in a known manner.
  • This heat exchanger 6 is connected with the interposition of the plate heat exchanger on the one hand with the return line 7 and on the other hand with the flow 8 of a heating circuit not shown.
  • the plate heat exchanger has a cold water inlet connection 5 and a hot water outlet connection 4.
  • Essential for the method according to the invention is now that the monitoring takes place during and after a predetermined minimum period of hot water and that a pollution condition detected and in a suitable manner the operator of the heating system is signaled when the power of the heater 2 fluctuates beyond a predetermined amount and at the same time the hot water actual temperature at the heat exchanger 1 is less than a predetermined hot water set temperature.
  • FIGS. 2 and 3 which show an operation with non-polluted heat exchanger 1
  • a predetermined hot water target temperature of about 43 ° C is reliably achieved
  • the power of the heater 2 and the burner 3 is quite uniform average about 18 kW.
  • the hot water actual temperature does not run firstly evenly and secondly, it does not reach the average set hot water temperature of about 43 ° C, which is around 37 ° C here.
  • the heater 2 and the burner 3 is running in the so-called cyclic operation, ie, the scheme tries to reach the predetermined hot water set temperature, the burner 3 but must be turned off again and again by a corresponding control, as its maximum power is achieved.
  • the monitoring of the soiling state can optionally be carried out in operation (ie permanently), from time to time, at regular intervals or at intervals of less than 2 days (if there is any hot water preparation at all during this time) becomes.
  • a contamination state is detected when the power fluctuates during monitoring more than 30% of the maximum power of the heater 2 (depending on the device design or the modulation range).
  • a contamination state is detected if, during monitoring, the power of the heater 2 increases so much that a monitoring sensor such as a temperature monitor switches off the burner 3 of the heater 2.
  • a contamination state is detected when the average hot water actual temperature during monitoring exceeds 3 ° C, the predetermined hot water target temperature at the heat exchanger 1 (depending on the device type), the actual hot water temperature at a hot water outlet connection 4 of the heat exchanger 1 is monitored.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Überwachung des Verschmutzungszustandes eines Wärmetauschers gemäß dem Oberbegriff des Patentanspruchs 1. Solch ein Verfahren ist aus DD 292963 A5 bekannt. Bei diesem bekannten Verfahren wird ein Verschmutzungszustand erkannt, wenn die Warmwasseristtemperatur an einem Wärmetauscher kleiner als eine Vorgegebene Warmwassersolltemperatur ist.The invention relates to a method for monitoring the soiling state of a heat exchanger according to the preamble of claim 1. Such a method is out DD 292963 A5 known. In this known method, a soiling state is detected when the hot water temperature at a heat exchanger is less than a predetermined hot water target temperature.

Ein Verfahren zur Überwachung des Verschmutzungszustandes eines Wärmetauschers zur Warmwasserbereitung an einem Heizgerät ist nach der DE 43 09 313 A1 bekannt. Bei diesem Verfahren werden eine Reihe von an der Heizungsanlage vorgesehenen Temperaturfühlern und ein Pumpendrehzahlsensor verwendet, um einen Verschmutzungszustand (zum Beispiel Verkalkung) des Wärmetauschers festzustellen. Dazu ist es allerdings erforderlich, dass bei Erstinbetriebnahme der Heizungsanlage Ursprungs-Betriebsdaten ermittelt und abgespeichert werden, die später turnusmäßig mit Folge-Betriebsdaten verglichen werden.A method for monitoring the state of soiling of a heat exchanger for hot water to a heater is after the DE 43 09 313 A1 known. In this method, a series of temperature sensors provided on the heating system and a pump speed sensor are used to detect a fouling condition (for example, calcification) of the heat exchanger. For this purpose, however, it is necessary that when commissioning the heating system originating operating data are determined and stored, which are later compared regularly with follow-up operating data.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren der eingangs genannten Art zu verbessern, und zwar insbesondere dahingehend, dass keine Ursprungs-Betriebsdaten erfasst werden müssen.The invention has for its object to improve a method of the type mentioned, in particular to the effect that no original operating data must be detected.

Diese Aufgabe ist mit einem Verfahren der eingangs genannten Art durch die im Kennzeichen des Patentanspruchs 1 aufgeführten Merkmale gelöst.This object is achieved by a method of the type mentioned by the features listed in the characterizing part of patent claim 1.

Nach der Erfindung ist also vorgesehen, dass die Überwachung während und ab einer vorgegebenen Mindestdauer der Warmwasserbereitung stattfindet und dass ein Verschmutzungszustand erkannt wird, wenn die Leistung des Heizgerätes über ein vorgegebenes Maß hinaus schwankt und gleichzeitig die Warmwasser-Isttemperatur am Wärmetauscher kleiner als eine vorgegebene Warmwasser-Solltemperatur ist.According to the invention, it is thus provided that the monitoring takes place during and after a predetermined minimum duration of hot water preparation and that a contamination state is detected when the power of the heater fluctuates beyond a predetermined amount and at the same time the hot water actual temperature at the heat exchanger smaller than a predetermined hot water Target temperature is.

Mit anderen Worten ist es gemäß dem erfindungsgemäßen Verfahren möglich, auch ohne vorherige Erfassung von Ursprungs-Betriebsdaten allein auf Basis der aktuellen Betriebsdaten den Verschmutzungszustand des Wärmetauschers sicher zu erkennen.In other words, it is possible according to the inventive method, even without prior detection of original operating data based solely on the current operating data to reliably detect the contamination state of the heat exchanger.

Dies geschieht auf Basis zweier Voraussetzungen, nämlich, dass im Moment der Überwachung tatsächlich eine Warmwasserbereitung und diese dann auch noch für eine vorgegebene Mindestdauer stattfindet. Findet keine oder nur eine kurze (unterhalb der vorgegebenen Mindestdauer liegende) Warmwasserbereitung statt, soll auch keine Überwachung erfolgen. Sind aber die beiden Voraussetzungen erfüllt, ist die Erkennung eines Verschmutzungszustandes erfindungsgemäß schon dann möglich, wenn zwei weitere Bedingungen erfüllt sind, nämlich erstens, wenn die Leistung des Heizgerätes über ein vorgegebenes Maß hinaus schwankt, und zweitens, wenn die Warmwasser-Isttemperatur am Wärmetauscher kleiner als eine vorgegebene Warmwasser-Solltemperatur ist, also die eigentlich angestrebte Auslauftemperatur nicht erreicht wird.This is done on the basis of two prerequisites, namely that at the moment of the monitoring actually takes place a hot water and this then also for a predetermined minimum duration. If no or only a short (below the predetermined minimum duration) hot water preparation takes place, no monitoring should take place. But if the two conditions are met, the detection of a contamination state according to the invention already possible if two other conditions are met, namely, first, if the power of the heater varies beyond a predetermined amount, and second, if the hot water actual temperature at the heat exchanger smaller as a predetermined hot water setpoint temperature, so the actual desired outlet temperature is not reached.

Andere vorteilhafte Weiterbildungen des erfindungsgemäßen Verfahrens ergeben sich aus den abhängigen Ansprüchen.Other advantageous developments of the method according to the invention will become apparent from the dependent claims.

Der Vollständigkeit halber wird noch auf die DE 197 35 558 A1 hingewiesen, bei der aber ebenfalls Referenzdaten als Ausgangsbasis für die weitere Überwachung ermittelt werden müs-sen (siehe Spalte 1, Zeile 39 ff.).The sake of completeness is still on the DE 197 35 558 A1 However, reference data must also be determined as the starting point for further monitoring (see column 1, line 39 ff.).

Das erfindungsgemäße Verfahren einschließlich seiner vorteilhaften Weiterbildungen gemäß der abhängigen Patentansprüche wird nachfolgend anhand der zeichnerischen Darstellung eines bevorzugten Ausführungsbeispiels näher erläutert.The inventive method including its advantageous developments according to the dependent claims will be explained in more detail with reference to the drawing of a preferred embodiment.

Es zeigt

Figur 1
schematisch ein Heizgerät mit einem Wärmetauscher zur Warmwasserbereitung;
Figur 2
einen Temperaturverlauf am Warmwasserauslaufan- schluss über der Zeit bei ordnungsgemäßem Wärmetau- scher;
Figur 3
einen Leistungsverlauf des Brenners über der Zeit bei ordnungsgemäßem Wärmetauscher;
Figur 4
einen Temperaturverlauf am Warmwasserauslaufan- schluss über der Zeit bei verschmutztem Wärmetau- scher und
Figur 5
einen Leistungsverlauf des Brenners über der Zeit bei verschmutztem Wärmetauscher.
It shows
FIG. 1
schematically a heater with a heat exchanger for water heating;
FIG. 2
a temperature profile at the hot water outlet connection over time with a proper heat exchanger;
FIG. 3
a performance curve of the burner over time with a proper heat exchanger;
FIG. 4
a temperature profile at the hot water outlet connection over time with dirty heat exchanger and
FIG. 5
a performance curve of the burner over time with dirty heat exchanger.

In Figur 1 ist ein Ausführungsbeispiel eines Heizgerätes 2 dargestellt, bei dem das erfindungsgemäße Verfahren zur Überwachung des Verschmutzungszustandes eines Wärmetauschers 1 zur Warmwasserbereitung durchführbar ist. Beim dargestellten Heizgerät 2 handelt es sich um ein wandhängendes Heizgerät, bei dem der zu überwachende Wärmetauscher 1 als Plattenwärmetauscher ausgebildet ist. Darüber hinaus weist das Heizgerät 2 einen mit einem Gasanschluss 9 versehenen Brenner 3 auf, dem in bekannter Weise ein weiterer Wärmetauscher 6 zugeordnet ist. Dieser Wärmetauscher 6 ist unter Zwischenschaltung des Plattenwärmetauschers einerseits mit dem Rücklauf 7 und andererseits mit dem Vorlauf 8 eines nicht weiter dargestellten Heizkreises verbunden. Weiterhin weist der Plattenwärmetauscher einen Kaltwasserzulaufanschluss 5 und einen Warmwasserauslaufanschluss 4 auf.In FIG. 1 an embodiment of a heater 2 is shown, in which the inventive method for monitoring the contamination state of a heat exchanger 1 for hot water preparation is feasible. The heater 2 shown is a wall-mounted heater in which the heat exchanger to be monitored 1 is designed as a plate heat exchanger. In addition, the heater 2 has a provided with a gas connection 9 burner 3, which is associated with a further heat exchanger 6 in a known manner. This heat exchanger 6 is connected with the interposition of the plate heat exchanger on the one hand with the return line 7 and on the other hand with the flow 8 of a heating circuit not shown. Furthermore, the plate heat exchanger has a cold water inlet connection 5 and a hot water outlet connection 4.

Wesentlich für das erfindungsgemäße Verfahren ist nun, dass die Überwachung während und ab einer vorgegebenen Mindestdauer der Warmwasserbereitung stattfindet und dass ein Verschmutzungszustand erkannt und in geeigneter Weise dem Betreiber der Heizungsanlage signalisiert wird, wenn die Leistung des Heizgerätes 2 über ein vorgegebenes Maß hinaus schwankt und gleichzeitig die Warmwasser-Isttemperatur am Wärmetauscher 1 kleiner als eine vorgegebene Warmwasser-Solltemperatur ist.Essential for the method according to the invention is now that the monitoring takes place during and after a predetermined minimum period of hot water and that a pollution condition detected and in a suitable manner the operator of the heating system is signaled when the power of the heater 2 fluctuates beyond a predetermined amount and at the same time the hot water actual temperature at the heat exchanger 1 is less than a predetermined hot water set temperature.

Gemäß den Figuren 2 und 3, die einen Betrieb bei nicht verschmutztem Wärmetauscher 1 zeigen, wird eine vorgegebene Warmwasser-Solltemperatur von etwa 43 °C zuverlässig erreicht, wobei die Leistung des Heizgerätes 2 bzw. des Brenners 3 dabei recht gleichmäßig durchschnittlich etwa 18 kW beträgt.According to the FIGS. 2 and 3 , which show an operation with non-polluted heat exchanger 1, a predetermined hot water target temperature of about 43 ° C is reliably achieved, the power of the heater 2 and the burner 3 is quite uniform average about 18 kW.

Hiervon weicht das Betriebsverhalten gemäß den Figuren 4 und 5 deutlich ab: Die Warmwasser-Isttemperatur verläuft erstens nicht gleichmäßig und zweitens erreicht sie auch im Durchschnitt, der hier bei etwa 37 °C liegt, nicht die vorgegebene Warmwasser-Solltemperatur von etwa 43 °C. Darüber hinaus ist zu erkennen, dass das Heizgerät 2 bzw. der Brenner 3 im so genannten Taktbetrieb läuft, d. h. die Regelung versucht, die vorgegebene Warmwasser-Solltemperatur zu erreichen, wobei der Brenner 3 aber von einer entsprechenden Regelung immer wieder abgeschaltet werden muss, da seine Maximalleistung erreicht wird.This deviates from the operating behavior according to the FIGS. 4 and 5 clearly: The hot water actual temperature does not run firstly evenly and secondly, it does not reach the average set hot water temperature of about 43 ° C, which is around 37 ° C here. In addition, it can be seen that the heater 2 and the burner 3 is running in the so-called cyclic operation, ie, the scheme tries to reach the predetermined hot water set temperature, the burner 3 but must be turned off again and again by a corresponding control, as its maximum power is achieved.

Zur Gewährleistung einer dauerhaften Funktionstüchtigkeit des Heizgerätes 2 ist vorgesehen, dass die Überwachung des Verschmutzungszustandes wahlweise betriebsbegleitend (also dauernd), von Zeit zu Zeit, in regelmäßigen Intervallen oder im Abstand von weniger als 2 Tagen (sofern überhaupt eine Warmwasserbereitung in dieser Zeit stattfindet) durchgeführt wird.To ensure a permanent functioning of the heater 2, it is provided that the monitoring of the soiling state can optionally be carried out in operation (ie permanently), from time to time, at regular intervals or at intervals of less than 2 days (if there is any hot water preparation at all during this time) becomes.

Da weiterhin eine kurze Warmwasserbereitung bzw. ein kurzes Warmwasserzapfen letztlich nicht zu einem stationären Betrieb des Wärmetauschers führt und auf dieser Basis keine eindeutigen Aussagen getroffen werden könnten, ist erfindungsgemäß vorgesehen, dass die Überwachung ab einer Mindestdauer der Warmwasserbereitung von mehr als zwei Minuten stattfindet (je nach Geräteleistung bzw. Auslegung des Plattenwärmetauschers).Furthermore, since a short hot water preparation or a short hot water tap does not ultimately lead to a stationary operation of the heat exchanger and on this basis no clear statements could be made, according to the invention, that monitoring takes place after a minimum duration of domestic hot water preparation of more than two minutes (depending on the unit performance or design of the plate heat exchanger).

Ferner ist vorgesehen, dass ein Verschmutzungszustand erkannt wird, wenn die Leistung während der Überwachung mehr als 30% der maximalen Leistung des Heizgerätes 2 schwankt (in Abhängigkeit der Geräteauslegung bzw. des Modulationsbereichs). Ergänzend kann darüber hinaus vorgesehen sein, dass ein Verschmutzungszustand erkannt wird, wenn während der Überwachung die Leistung des Heizgerätes 2 so stark ansteigt, dass ein Überwachungssensor wie Temperaturwächter den Brenner 3 des Heizgerätes 2 ausschaltet.It is further provided that a contamination state is detected when the power fluctuates during monitoring more than 30% of the maximum power of the heater 2 (depending on the device design or the modulation range). In addition, it may additionally be provided that a contamination state is detected if, during monitoring, the power of the heater 2 increases so much that a monitoring sensor such as a temperature monitor switches off the burner 3 of the heater 2.

Schließlich ist vorgesehen, dass ein Verschmutzungszustand erkannt wird, wenn die durchschnittliche Warmwasser-Isttemperatur während der Überwachung mehr als 3 °C die vorgegebene Warmwasser-Solltemperatur am Wärmetauscher 1 unterschreitet (je nach Gerätetyp), wobei die Warmwasser-Isttemperatur an einem Warmwasserauslaufanschluss 4 des Wärmetauschers 1 überwacht wird.Finally, it is provided that a contamination state is detected when the average hot water actual temperature during monitoring exceeds 3 ° C, the predetermined hot water target temperature at the heat exchanger 1 (depending on the device type), the actual hot water temperature at a hot water outlet connection 4 of the heat exchanger 1 is monitored.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Wärmetauscherheat exchangers
22
Heizgerätheater
33
Brennerburner
44
WarmwasserauslaufanschlussHot water output port
55
KaltwasserzulaufanschlussCold water inlet connection
66
Wärmetauscherheat exchangers
77
Rücklaufreturns
88th
Vorlaufleader
99
Gasanschlussgas connection

Claims (7)

  1. A method for purposes of monitoring the state of contamination of a heat exchanger (1) for hot water preparation on a heating unit (2), wherein monitoring takes place during and after a described minimum duration of hot water preparation, and,
    characterised in that
    a state of contamination is detected, if the power of the heating unit (2) fluctuates above a prescribed extent, and at the same time the actual hot water temperature on the heat exchanger (1) is less than a prescribed design hot water temperature.
  2. The method in accordance with Claim 1,
    characterised in that
    monitoring of the state of contamination, electively accompanying operation, is executed from time to time at regular intervals, or at a spacing of less than 2 days.
  3. The method in accordance with Claim 1 or 2,
    characterised in that
    monitoring takes place from a minimum duration of hot water preparation of more than two minutes.
  4. The method in accordance with one of the Claims 1 to 3,
    characterised in that
    a state of contamination is detected if the power during monitoring fluctuates by more than 30% of the maximum power of the heating unit (2).
  5. The method in accordance with one of the Claims 1 to 4,
    characterised in that
    a state of contamination is detected, if during monitoring the power of the heating unit (2) rises so severely that a monitoring sensor, such as a temperature transducer, switches off a burner (3) of the heating unit (2).
  6. The method in accordance with one of the Claims 1 to 5,
    characterised in that
    a state of contamination is detected if the average actual hot water temperature during monitoring falls below the prescribed design hot water temperature on the heat exchanger (1) by more than 3 °C.
  7. The method in accordance with one of the Claims 1 to 6,
    characterised in that
    the actual hot water temperature is monitored at a hot water discharge port (4) of the heat exchanger (1).
EP10006935.0A 2009-07-23 2010-07-06 Method for monitoring the contamination of a heat exchanger on a heater Active EP2280230B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009034556A DE102009034556A1 (en) 2009-07-23 2009-07-23 Method for monitoring the state of soiling of a heat exchanger for hot water preparation on a heater

Publications (3)

Publication Number Publication Date
EP2280230A2 EP2280230A2 (en) 2011-02-02
EP2280230A3 EP2280230A3 (en) 2012-03-21
EP2280230B1 true EP2280230B1 (en) 2013-06-05

Family

ID=42668482

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Application Number Title Priority Date Filing Date
EP10006935.0A Active EP2280230B1 (en) 2009-07-23 2010-07-06 Method for monitoring the contamination of a heat exchanger on a heater

Country Status (2)

Country Link
EP (1) EP2280230B1 (en)
DE (1) DE102009034556A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013114385A1 (en) * 2013-12-18 2015-06-18 Endress + Hauser Wetzer Gmbh + Co. Kg Heating element for firing on heating or steam boilers
DE102014202478A1 (en) * 2014-02-12 2015-08-13 Robert Bosch Gmbh Method for diagnosing a heating system with at least one heat exchanger

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT389584B (en) * 1988-04-15 1989-12-27 Vaillant Gmbh HEATING SYSTEM
DD292963A5 (en) * 1990-03-16 1991-08-14 Veb Technische Gebaeudeausruestung,De METHOD FOR DETERMINING THE POLLUTION GRADE OF HEAT TRANSMITTERS
DE4309313A1 (en) 1993-03-23 1994-09-29 Armin Niederer Process for monitoring the contamination and / or calcification status of heat exchangers in heating or cooling systems
DE19504325C2 (en) * 1995-02-10 1997-07-17 Tepcon Eng Gmbh Method and device for cost-oriented monitoring and / or display of the operating state of a cleanable heat exchanger
DE19735558A1 (en) * 1997-08-16 1999-02-25 Bosch Gmbh Robert Device and method for heating domestic water
DE102005006757A1 (en) * 2005-02-15 2006-08-17 Robert Bosch Gmbh Combined heater for space heating and water heating and method for operating the same

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Publication number Publication date
EP2280230A3 (en) 2012-03-21
EP2280230A2 (en) 2011-02-02
DE102009034556A1 (en) 2011-02-03

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