EP0548536B1 - Heater for room heating and domestic water production - Google Patents

Heater for room heating and domestic water production Download PDF

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Publication number
EP0548536B1
EP0548536B1 EP92119597A EP92119597A EP0548536B1 EP 0548536 B1 EP0548536 B1 EP 0548536B1 EP 92119597 A EP92119597 A EP 92119597A EP 92119597 A EP92119597 A EP 92119597A EP 0548536 B1 EP0548536 B1 EP 0548536B1
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EP
European Patent Office
Prior art keywords
water
heating
domestic
storage tank
heat exchanger
Prior art date
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Expired - Lifetime
Application number
EP92119597A
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German (de)
French (fr)
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EP0548536A1 (en
Inventor
Hans-Jochen Dr.-Ing. Schwarz
Herbert Rehfuss
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Robert Bosch GmbH
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Robert Bosch GmbH
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Publication of EP0548536A1 publication Critical patent/EP0548536A1/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
    • 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
    • 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
    • F24H9/00—Details
    • F24H9/14—Arrangements for connecting different sections, e.g. in water 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
    • F24H9/00—Details
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • F24H9/142—Connecting hydraulic components
    • 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
    • F24H9/00—Details
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • F24H9/148—Arrangements of boiler components on a frame or within a casing to build the fluid heater, e.g. boiler

Definitions

  • the invention relates to heaters according to the preamble of the main claim.
  • the heat exchanger directly acted upon by the combustion gases has the heating water flowing through it and the hot water circuit led through the device's internal hot water tank is branched off from the pipe system for the heating water.
  • These heaters are designed in such a way that they supply domestic water in sufficient quantities without any significant initial delay at the desired temperature, so that there is no need to install an external domestic hot water tank.
  • an additional tank is arranged, which is connected to the domestic hot water tank via two pipes. This version is relatively complex and requires additional installation space, which undesirably increases the volume of the heater.
  • GB-A 2 130 347 describes a heating system with hot water and heating water supply, in which a hot water tank is heated directly by a burner.
  • a heating network can also be supplied with heat by a heat exchanger located in the hot water tank and surrounded by the hot water.
  • the arrangement according to the invention with the characterizing features of the main claim has the advantage that the heat energy generated by the heat source is at least partially transferred without detour via the heating water to the stored and / or flowing hot water and that the heat content in the hot water tank in the pipe system for the heating water is involved.
  • the arrangement according to the invention replaces the parallel connection of the hot water circuit and the heating circuit which is customary in the known heaters with integrated domestic hot water preparation by a series connection of the two circuits, as a result of which their different heating requirements can be met better than previously in terms of control technology. This measure makes it possible to design the power / volume ratio of the heater so cheaply that the hot water comfort of an arrangement with an externally installed hot water tank is achieved without any appreciable increase in volume of the heater.
  • a three-way valve which is influenced by the water temperature in the process water outlet, can be arranged at the branch of the process water outlet from the internal hot water circuit carrying the process water, which initially allows the process water to flow primarily from the process water storage tank and then increasingly directly from the heat exchanger affected by the combustion gases into the process water outlet.
  • only the heat exchanger in the service water tank is provided for heating the heating water, the heat supply to the heating water being effected exclusively indirectly via the service water tank.
  • a second heat exchanger which is arranged parallel to the heat exchanger in the service water storage and which is directly acted upon by the combustion gases, and which is at least as long in the piping system for the heating water is included when the water temperature in the domestic hot water tank falls below a predetermined value.
  • the supply of heat to the domestic hot water tank necessary for maintaining the storage temperature can advantageously take place via both heat exchangers to the pipe system of the heating water.
  • the arrangements described above can be meaningfully supplemented with purely constructive measures with regard to the design and arrangement of the individual components or units of the device in order to optimize its performance / volume ratio.
  • a design that is compact despite the sufficient dimensioning of the domestic hot water tank is obtained if it is combined with the expansion vessel of the heater to form a unit arranged on the rear of the device, which preferably fills the outline profile of the heater as seen from the front as far as possible.
  • the assembly of the heater can be made easier if the unit consisting of the domestic hot water tank and expansion tank is designed as a mounting plate for the other components or units, such as gas and water fittings, pumps, valves, burners, combustion chambers, heat exchangers, flow safeguards, blowers and central electronics .
  • a special support frame for the entirety of all parts of the heater is dispensable if the structural unit directly forms the load-bearing device frame provided with means for fastening to a wall.
  • the piping effort can be reduced and the use of modern manufacturing methods can be facilitated if components or aggregates that are closely related to one another and / or connected by cables are combined to form prefabricated assemblies that can be individually attached to or preferably part of the piping are attached.
  • the device connections for gas, cold water, process water and for the heating network are expediently provided on the structural unit.
  • FIG. 1 shows the front view of the basic device structure of the first exemplary embodiment with the casing shell removed
  • FIG. 2 shows a side view of the device structure according to FIG Figure 1
  • Figures 3 and 4 each the device concept of the first and second embodiment.
  • the heater according to Figures 1 to 3 has an expansion vessel 10 which is fixedly connected to a domestic hot water tank 12 and together with this forms an assembly 14 arranged on the rear of the device.
  • This unit 14 is used in addition to the hot water storage and absorption of the expansion volume of the heating water as a mounting plate for other components or units of the heater and also forms its supporting frame, so that a special support frame is unnecessary.
  • the unit 14 fills the outline profile of the heater as seen from the front as far as possible and is provided on the edge with means 16 for fastening it to a wall. Furthermore, means 18 are provided on the assembly 14 for attaching a jacket shell, not shown in the drawing.
  • the other components or units of the heater are combined to preassembled modules 20, 22, 24, 26, which are each attached or can be attached to the supporting unit 14. These components are not shown in detail in FIGS. 1 and 2 and are only mentioned or described in connection with FIG. 3 to the extent necessary for understanding the device concept.
  • the components or units of an assembly 20, 22, 24, 26 are closely related to one another and / or are connected to one another or to the domestic hot water tank 12 and the expansion tank 10 via pipes, some of which are in the assemblies themselves and some are in the assembly 14 are integrated.
  • the device connections 28 for gas, 30 for cold water, 32 for process water and 34, 36 for a heating network are provided on the structural unit 14.
  • the assembly 20 contains i.a. a gas valve and a heat generator 39 consisting of a gas burner, a combustion chamber and a heat exchanger 38 acted upon by the combustion gases, which is located in series with the domestic hot water tank 12 in an internal hot water circuit 40a, 40b through which domestic water flows.
  • the flow section 40a of the hot water circuit opening into the upper area of the hot water tank 12 leads via a 3-way valve 42, the outlet of which is connected to the corresponding connection 32 on the structural unit 14 via a hot water outlet 44.
  • a hot water pump 46 is installed, which is combined with the 3-way valve 42 to form the assembly 22.
  • the lower area of the domestic hot water tank 12 is connected to the corresponding connection 30 on the structural unit 14 via a cold water inlet.
  • the transmission surfaces of a heat exchanger 50 which are configured as a coil, are arranged in the interior of the domestic water storage tank 12 and lie in the course of a heating water supply line system 52a, 52b.
  • the flow section 52a of this line system leads from the heat exchanger 50 via a heating water pump 54 to the device connection 34.
  • the return section 52b leads from the device connection 36 via a 3-way valve 56 to the heat exchanger 50 and is also connected to the water chamber 58 of the expansion tank 10.
  • a mixing line 60 leading to the flow section 52a branches off from the 3-way valve 56 and opens there between the heat exchanger 50 and the heating water pump 54.
  • the heating water pump 54, the 3-way valve 56 and the admixing line 60 are combined to form the assembly 24.
  • the assembly 26 contains the central electronics of the heater. This controls according to setpoint sensors (not shown) for the heating water flow temperature and the hot water discharge temperature and temperature sensors 62, 64, 66, 68 in the flow section 52a, in the hot water tank 12, in the hot water outlet 44 and on the heat exchanger 38, the functional elements of the heater, namely the Burner, pumps 46, 54 and 3-way valves 42, 46.
  • hot water When hot water is drawn, which reports a sensor, usually a differential pressure sensor, to the central electronics, hot water is immediately available from the hot water tank 12 in sufficient quantity to bridge the run-up time of the temperature in the heat generator 39.
  • a sensor usually a differential pressure sensor
  • the outgoing domestic water is mixed down to the setpoint.
  • the heat generator 39 is put into operation and the 3-way valve 42 is activated in such a way that an increasing proportion of the quantities of process water flowing through the heat generator 39 flows.
  • the 3-way valve 42 reverses so that the total amount of hot water flowing through is heated in a water heater principle.
  • the heat generator can be controlled either continuously or in 2-point operation.
  • the heating power is transferred directly, ie without the interposition of an additional transmission medium, to the process water in the hot water circuit 40a, 40b, so that there is a particularly short run-up time for the process water temperature.
  • the constructive design already described and a corresponding dimensioning of the burner output the domestic hot water comfort of a system with an external domestic hot water tank can be achieved without significantly increasing the volume of the device.
  • the temperature in the hot water tank 12 is raised to the desired value monitored by the temperature sensor 64 via the inner hot water circuit 40a, 40b with high transmission efficiency.
  • the thermal energy is transferred indirectly into the heating network via the domestic water storage tank 12 and the heat exchanger 50 arranged therein.
  • the 3-way valve 56 is activated in such a way that it divides the heating water return flow quantity into the mixing line 60 and the heat exchanger 50 in accordance with the setpoint deviation of the flow temperature.
  • the thermal energy in the domestic hot water tank 12 is initially used and the burner is only started when the lower switching point of the temperature sensor 64 has been reached.
  • the heat exchanger 50 in the domestic hot water tank 12 is dimensioned such that it can only transfer a partial output of the burner to the heating water.
  • the domestic hot water tank 12 in the device-internal line system 52a, 52b With appropriate dimensioning and design of the components and control elements, it can be achieved that the burner is continuously controlled in almost all heat demand conditions.
  • the concept according to the invention also enables flow temperatures in the range from 20 to 80 degrees Celsius without corrosion problems.
  • the second exemplary embodiment has a heat generator 70 with two heat exchangers 72, 74, at least one of which is provided with heat transfer surfaces directly acted upon by the combustion gases and the other at least indirectly, via the water content of the one heat exchanger, the thermal energy from the combustion gases receives.
  • the heat exchanger 72 is located in an internal hot water circuit 76a, 76b, which leads through a hot water tank 80 combined with an expansion vessel 78 and contains a 3-way valve 82 to which a hot water outlet 84 is connected.
  • the temperature in the process water outlet 84 is regulated as in the first exemplary embodiment, to the description of which reference is made.
  • the second heat exchanger 74 in the heat generator 70 is located in a line system 86a, 86b, for the heating water, the flow section 86a of which leads via a reversing valve 88 to a device connection 90 for the flow line of the heating network.
  • the return section 86b of the line system goes from a device connection 92 for the return line of the heating network via a heating water pump 94 to the heat exchanger 74 and is also connected to the water chamber 96 of the expansion vessel 78.
  • an admixing line 98 leads through the service water tank 80 to the return section 86b.
  • the admixing line 98 is shaped to form a coiled tubing forming a heat exchanger 100.

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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)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von Heizgeräten nach der Gattung des Hauptanspruchs. Bei dem bekannten Heizgerät dieser Art (DE-OS 40 31 187) ist der von den Verbrennungsgasen unmittelbar beaufschlagte Wärmeübertrager vom Heizungswasser durchflossen und der durch den geräteinternen Brauchwasserspeicher hindurchgeführte Warmwasserkreis vom Leitungssystem für das Heizungswasser abgezweigt. Dabei sind diese Heizgeräte so ausgelegt, daß sie Brauchwasser ohne nennenswerte Anfangsverzögerung mit der gewünschten Temperatur in ausreichender Menge liefern, so daß sich die Installation eines externen Brauchwasserspeichers erübrigt. Um diese Komfortmerkmale der Brauchwasserbereitung zu erreichen, ist bei dem bekannten Heizgerät unter anderem neben dem Brauchwasserspeicher, der einen vom Heizungswasser durchflossenen Sekundärwärmetauscher enthält, ein Zusatzspeicher angeordnet, welcher über zwei Rohrleitungen mit dem Brauchwasserspeicher verbunden ist. Diese Ausführung ist verhältnismäßig aufwendig und benötigt zusätzlichen Einbauraum, der das Volumen des Heizgerätes unerwünscht vergrößert.The invention relates to heaters according to the preamble of the main claim. In the known heater of this type (DE-OS 40 31 187), the heat exchanger directly acted upon by the combustion gases has the heating water flowing through it and the hot water circuit led through the device's internal hot water tank is branched off from the pipe system for the heating water. These heaters are designed in such a way that they supply domestic water in sufficient quantities without any significant initial delay at the desired temperature, so that there is no need to install an external domestic hot water tank. In order to achieve these convenience features of domestic hot water preparation, in the known heater, in addition to the domestic hot water tank, which contains a secondary heat exchanger through which the heating water flows, an additional tank is arranged, which is connected to the domestic hot water tank via two pipes. This version is relatively complex and requires additional installation space, which undesirably increases the volume of the heater.

Die GB-A 2 130 347 beschreibt ein Heizsystem mit Brauch- und Heizungswasserbereitstellung, bei dem ein Brauchwasserspeicher direkt durch einen Brenner erhitzt wird. Dabei kann neben der Brauchwasserentnahme gleichzeitig durch einen im Brauchwasserspeicher liegenden und vom Brauchwasser umgebenden Wärmeübertrager ein Heizungsnetz mit Wärme versorgt werden.GB-A 2 130 347 describes a heating system with hot water and heating water supply, in which a hot water tank is heated directly by a burner. In addition to drawing hot water, a heating network can also be supplied with heat by a heat exchanger located in the hot water tank and surrounded by the hot water.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Anordnung mit den kennzeichnenden Merkmalen des Hauptanspruchs hat demgegenüber den Vorteil, daß die von der Wärmequelle erzeugte Wärmeenergie zumindest teilweise ohne Umweg über das Heizungswasser auf das gespeicherte und/oder durchfließende Brauchwasser übertragen wird und daß der Wärmeinhalt im Brauchwasserspeicher in das Leitungssystem für das Heizungswasser einbezogen ist. Die erfindungsgemäße Anordnung ersetzt die bei den bekannten Heizgeräten mit integrierter Brauchwasserbereitung übliche Parallelschaltung von Brauchwasserkreis und Heizungskreis durch eine Hintereinanderschaltung beider Kreise, wodurch deren unterschiedlichen Wärmeanforderungen regelungstechnisch besser als bisher entsprochen werden kann. Diese Maßnahme ermöglicht es, das Leistungs/Volumen-Verhältnis des Heizgerätes so günstig zu gestalten, daß der Brauchwasserkomfort einer Anordnung mit extern aufgestelltern Brauchwasserspeicher ohne nennenswerte Volumenvergrößerung des Heizgerätes erreicht wird.The arrangement according to the invention with the characterizing features of the main claim has the advantage that the heat energy generated by the heat source is at least partially transferred without detour via the heating water to the stored and / or flowing hot water and that the heat content in the hot water tank in the pipe system for the heating water is involved. The arrangement according to the invention replaces the parallel connection of the hot water circuit and the heating circuit which is customary in the known heaters with integrated domestic hot water preparation by a series connection of the two circuits, as a result of which their different heating requirements can be met better than previously in terms of control technology. This measure makes it possible to design the power / volume ratio of the heater so cheaply that the hot water comfort of an arrangement with an externally installed hot water tank is achieved without any appreciable increase in volume of the heater.

Da der Wärmetransport aus dem von den Verbrennungsgasen beaufschlagten Wärmeübertrager in den Brauchwasserspeicher ohne Zwischenschaltung eines zusätzlichen Übertragungsmediums unmittelbar durch im inneren Warmwasserkreislauf fließendes Brauchwasser selbst erfolgt, wird ein hoher Wirkungsgrad der Anordnung erzielt und eine schnelle Nachladung des Brauchwasserspeichers mit Warmwasser ermöglicht. Dabei kann ein u. a. von der Wassertemperatur im Brauchwasserablauf beeinflußtes Dreiwegeventil am Abzweig des Brauchwasserablaufs von dem das Brauchwasser führenden internen Warmwasserkreis angeordnet sein, welches das Brauchwasser zunächst überwiegend aus dem Brauchwasserspeicher und dann zunehmend unmittelbar aus dem von den Verbrennungsgasen beaufschlagten Wärmeübertrager in den Brauchwasserablauf fließen läßt.Since the heat transfer from the heat exchanger acted upon by the combustion gases into the domestic hot water tank takes place directly through domestic hot water flowing in the internal hot water circuit without the interposition of an additional transmission medium, the arrangement is highly efficient and the domestic hot water tank can be quickly recharged with hot water. A three-way valve, which is influenced by the water temperature in the process water outlet, can be arranged at the branch of the process water outlet from the internal hot water circuit carrying the process water, which initially allows the process water to flow primarily from the process water storage tank and then increasingly directly from the heat exchanger affected by the combustion gases into the process water outlet.

Bei einer bevorzugten Auführungsform ist für die Erwärmung des Heizungswassers allein der Wärmeübertrager im Brauchwasserspeicher vorgesehen wobei die Wärmezufuhr zum Heizungswasser ausschließlich mittelbar über den Brauchwasserspeicher erfolgt. Durch diese Maßnahmen ergibt sich ein besonders einfacher Aufbau mit einem geringen Verrohrungsaufwand, wodurch eine besonders kompakte Ausführung des Heizgerätes möglich wird.In a preferred embodiment, only the heat exchanger in the service water tank is provided for heating the heating water, the heat supply to the heating water being effected exclusively indirectly via the service water tank. These measures result in a particularly simple construction with little piping, which enables a particularly compact design of the heater.

In manchen Fällen kann es sich aus regelungstechnischen Gründen auch empfehlen, unter Inkaufnahme eines etwas höheren Aufwandes für die Erwärmung des Heizungswassers einen parallel zu dem Wärmeübertrager im Brauchwasserspeicher angeordneten, von den Verbrennungsgasen unmittelbar beaufschlagten zweiten Wärmeübertrager vorzusehen, der mindestens solange in das Leitungssystem für das Heizungswasser einbezogen ist, als die Wassertemperatur im Brauchwasserspeicher einen vorgegebenen Wert unterschreitet.In some cases, it may also be advisable for control-related reasons to provide a second heat exchanger, which is arranged parallel to the heat exchanger in the service water storage and which is directly acted upon by the combustion gases, and which is at least as long in the piping system for the heating water is included when the water temperature in the domestic hot water tank falls below a predetermined value.

In diesem Fall kann vorteilhaft die für die Speichertemperaturerhaltung notwendige Wärmezufuhr zum Brauchwasserspeicher über beide Wärmeübertrager dem Leitungssystem des Heizungswassers erfolgen.In this case, the supply of heat to the domestic hot water tank necessary for maintaining the storage temperature can advantageously take place via both heat exchangers to the pipe system of the heating water.

Die vorstehend beschriebenen Anordnungen können erfindungsgemäß mit rein konstruktiven Maßnahmen bezüglich der Gestaltung und Anordnung der einzelnen Bauelemente bzw. Aggregate des Gerätes sinnvoll ergänzt werden, um dessen Leistungs-/Volumen-Verhältnis zu optimieren.According to the invention, the arrangements described above can be meaningfully supplemented with purely constructive measures with regard to the design and arrangement of the individual components or units of the device in order to optimize its performance / volume ratio.

Eine trotz ausreichender Bemessung des Brauchwasserspeichers gedrängte Ausführung ergibt sich, wenn dieser mit dem Ausdehnungsgefäß des Heizgerätes zu einer an der Geräterückseit angeordneten Baueinheit zusammengefasst ist, die vorzugsweise das von der Vorderseite her gesehene Umrißprofil des Heizgerätes möglichst weitgehend ausfüllt.A design that is compact despite the sufficient dimensioning of the domestic hot water tank is obtained if it is combined with the expansion vessel of the heater to form a unit arranged on the rear of the device, which preferably fills the outline profile of the heater as seen from the front as far as possible.

Der Zusammenbau des Heizgerätes kann erleichtert werden, wenn die aus Brauchwasserspeicher und Ausdehnungsgefäß bestehende Baueinheit als Montageplatte für die übrigen Bauelemente bzw. Aggregate, wie Gas- und Wasserarmaturen, Pumpen, Ventile, Brenner, Brennkammer, Wärmetauscher, Strömungssicherung, Gebläse und Zentralelektronik, ausgebildet ist.The assembly of the heater can be made easier if the unit consisting of the domestic hot water tank and expansion tank is designed as a mounting plate for the other components or units, such as gas and water fittings, pumps, valves, burners, combustion chambers, heat exchangers, flow safeguards, blowers and central electronics .

Ein besonderer Tragrahmen für die Gesamtheit aller Teile des Heizgerätes wird entbehrlich, wenn die Baueinheit unmittelbar das Tragende, mit Mitteln zum Befestigen an einer Wand versehene Gerätegestell bildet.A special support frame for the entirety of all parts of the heater is dispensable if the structural unit directly forms the load-bearing device frame provided with means for fastening to a wall.

Der Verrohrungsaufwand kann vermindert und die Anwendung moderner Fertigungsmethoden erleichtert werden, wenn miteinander in engem Funktonszusammenhang stehende und/oder durch Leitungen verbundene Bauelemente bzw. Aggregate zu vorgefertigten Baugruppen zusammengefasst sind, die einzeln für sich an der vorzugsweise auch einen Teil der Verrohrung aufweisenden Baueinheit befestigbar bzw. befestigt sind.The piping effort can be reduced and the use of modern manufacturing methods can be facilitated if components or aggregates that are closely related to one another and / or connected by cables are combined to form prefabricated assemblies that can be individually attached to or preferably part of the piping are attached.

Zweckmäßig sind an der Baueinheit die Geräteanschlüsse für Gas, Kaltwasser, Brauchwasser und für das Heizungsnetz, sowie vorzugsweise auch Mittel zum Zentrieren und Festhalten einer Mantelschale vorgesehen.The device connections for gas, cold water, process water and for the heating network, and preferably also means for centering and holding a jacket shell, are expediently provided on the structural unit.

Zeichnungdrawing

Zwei Ausführungsbeispiele der Erfindung sind in der Zeichnung schematisch dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen Figur 1 die Vorderansicht des grundsätzlichen Geräteaufbaus des ersten Ausführungsbeispiels bei abgenommener Mantelschale, Figur 2 eine Seitenansicht des Geräteaufbaus nach Figur 1, und die Figuren 3 und 4 je das Gerätekonzept des ersten und zweiten Ausführungsbeispiels.Two embodiments of the invention are shown schematically in the drawing and explained in more detail in the following description. 1 shows the front view of the basic device structure of the first exemplary embodiment with the casing shell removed, FIG. 2 shows a side view of the device structure according to FIG Figure 1, and Figures 3 and 4 each the device concept of the first and second embodiment.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Das Heizgerät nach den Figuren 1 bis 3 hat ein Ausdehnungsgefäß 10, das fest mit einem Brauchwasserspeicher 12 verbunden ist und zusammen mit diesem eine an der Geräterückseite angeordnete Baueinheit 14 bildet. Diese Baueinheit 14 dient außer der Brauchwasserspeicherung und Aufnahme des Dehnvolumens des Heizungswassers als Montageplatte für andere Bauelemente bzw. Aggregate des Heizgerätes und bildet darüberhinaus auch dessen tragendes Gestell, so daß sich hierfür ein besonderer Tragrahmen erübrigt. Die Baueinheit 14 füllt das von der Vorderseite her gesehene Umrißprofil des Heizgerätes so weit wie möglich aus und ist am Rand mit Mitteln 16 zu dessen Befestigung an einer Wand versehen. Ferner sind an der Baueinheit 14 Mittel 18 zum Anbringen einer in der Zeichnung nicht dargestellten Mantelschale vorgesehen.The heater according to Figures 1 to 3 has an expansion vessel 10 which is fixedly connected to a domestic hot water tank 12 and together with this forms an assembly 14 arranged on the rear of the device. This unit 14 is used in addition to the hot water storage and absorption of the expansion volume of the heating water as a mounting plate for other components or units of the heater and also forms its supporting frame, so that a special support frame is unnecessary. The unit 14 fills the outline profile of the heater as seen from the front as far as possible and is provided on the edge with means 16 for fastening it to a wall. Furthermore, means 18 are provided on the assembly 14 for attaching a jacket shell, not shown in the drawing.

Die anderen Bauelemente bzw. Aggregate des Heizgeräts sind zu vormontierten Baugruppen 20, 22, 24, 26 zusammengefaßt, die je für sich an der tragenden Baueinheit 14 befestigt bzw. befestigbar sind. Diese Bauelemente sind in den Figuren 1 und 2 im einzelnen nicht dargestellt und erst in Zusammenhang mit Figur 3 in einem für das Verständnis des Gerätekonzepts notwendigen Umfang erwähnt bzw. beschrieben. Die Bauelemente bzw. Aggregate einer Baugruppe 20, 22, 24, 26 stehen miteinander im engen Funktionszusammenhang und/oder sind untereinander bzw. mit dem Brauchwasserspeicher 12 und dem Ausdehnungsgefäß 10 über Rohrleitungen verbunden, die teils in den Baugruppen selbst und teils in der Baueinheit 14 integriert sind. Ferner sind an der Baueinheit 14 die Geräteanschlüsse 28 für Gas, 30 für Kaltwasser, 32 für Brauchwasser und 34, 36 für ein Heizungsnetz vorgesehen.The other components or units of the heater are combined to preassembled modules 20, 22, 24, 26, which are each attached or can be attached to the supporting unit 14. These components are not shown in detail in FIGS. 1 and 2 and are only mentioned or described in connection with FIG. 3 to the extent necessary for understanding the device concept. The components or units of an assembly 20, 22, 24, 26 are closely related to one another and / or are connected to one another or to the domestic hot water tank 12 and the expansion tank 10 via pipes, some of which are in the assemblies themselves and some are in the assembly 14 are integrated. Furthermore, the device connections 28 for gas, 30 for cold water, 32 for process water and 34, 36 for a heating network are provided on the structural unit 14.

Die Baugruppe 20 enthält u.a. eine Gasarmatur und einen aus einem Gasbrenner, einer Brennkammer und eine von den Verbrennungsgasen beaufschlagten Wärmeübertrager 38 bestehenden Wärmeerzeuger 39, der in Reihe mit dem Brauchwasserspeicher 12 in einem inneren, von Brauchwasser durchflossenen Warmwasserkreis 40a, 40b liegt. Der in den oberen Bereich des Brauchwasserspeichers 12 mündende Vorlaufabschnitt 40a des Warmwasserkreises führt über ein 3-Wege-Ventil 42, dessen Ausgang über einen Brauchwasserablauf 44 mit dem entsprechenden Anschluß 32 an der Baueinheit 14 verbunden ist. In den vom unteren Bereich des Brauchwasserspeichers 12 ausgehenden Rücklaufabschnitt 40b des Warmwasserkreises ist eine Brauchwasserpumpe 46 eingebaut, die mit dem 3-Wege-Ventil 42 zu der Baugruppe 22 zusammengefasst ist. Der untere Bereich des Brauchwasserspeichers 12 ist über einen Kaltwasserzulauf mit dem entsprechenden Anschluß 30 an der Baueinheit 14 verbunden.The assembly 20 contains i.a. a gas valve and a heat generator 39 consisting of a gas burner, a combustion chamber and a heat exchanger 38 acted upon by the combustion gases, which is located in series with the domestic hot water tank 12 in an internal hot water circuit 40a, 40b through which domestic water flows. The flow section 40a of the hot water circuit opening into the upper area of the hot water tank 12 leads via a 3-way valve 42, the outlet of which is connected to the corresponding connection 32 on the structural unit 14 via a hot water outlet 44. In the return section 40b of the hot water circuit starting from the lower area of the hot water tank 12, a hot water pump 46 is installed, which is combined with the 3-way valve 42 to form the assembly 22. The lower area of the domestic hot water tank 12 is connected to the corresponding connection 30 on the structural unit 14 via a cold water inlet.

Im Inneren des Brauchwasserspeichers 12 sind die als Rohrschlange ausgebildeten Übertragungsflächen eines Wärmeübertragers 50 angeordnet, der im Zuge eines heizungswasserführenden Leitungssystems 52a, 52b liegt. Der Vorlaufabschnitt 52a dieses Leitungssystems führt vom Wärmeübertrager 50 über eine Heizungswasserpumpe 54 zum Geräteanschluß 34. Der Rücklaufabschnitt 52b führt vom Geräteanschluß 36 über ein 3-Wege-Ventil 56 zum Wärmeübertrager 50 zurück und ist außerdem mit der Wasserkammer 58 des Ausdehnungsgefäßes 10 verbunden. Vom 3-Wege-Ventil 56 zweigt eine zum Vorlaufabschnitt 52a führende Beimischleitung 60 ab, die dort zwischen Wärmeübertrager 50 und Heizungswasserpumpe 54 einmündet. Die Heizungswasserpumpe 54, das 3-Wege-Ventil 56 und die Beimischleitung 60 sind zur Baugruppe 24 zusammengefaßt.The transmission surfaces of a heat exchanger 50, which are configured as a coil, are arranged in the interior of the domestic water storage tank 12 and lie in the course of a heating water supply line system 52a, 52b. The flow section 52a of this line system leads from the heat exchanger 50 via a heating water pump 54 to the device connection 34. The return section 52b leads from the device connection 36 via a 3-way valve 56 to the heat exchanger 50 and is also connected to the water chamber 58 of the expansion tank 10. A mixing line 60 leading to the flow section 52a branches off from the 3-way valve 56 and opens there between the heat exchanger 50 and the heating water pump 54. The heating water pump 54, the 3-way valve 56 and the admixing line 60 are combined to form the assembly 24.

Die Baugruppe 26 enthält die Zentralelektronik des Heizgeräts. Diese steuert nach Maßgabe von nicht dargestellten Sollwertgebern für die Heizungswasser-Vorlauftemperatur und die Brauchwasser-Ablauftemperatur sowie von Temperaturfühlern 62, 64, 66, 68 im Vorlaufabschnitt 52a, im Brauchwasserspeicher 12, im Brauchwasserablauf 44 und am Wärmeübertrager 38 die Funktionselemente des Heizgerätes, nämlich den Brenner, die Pumpen 46, 54 und die 3-Wege-Ventile 42, 46.The assembly 26 contains the central electronics of the heater. This controls according to setpoint sensors (not shown) for the heating water flow temperature and the hot water discharge temperature and temperature sensors 62, 64, 66, 68 in the flow section 52a, in the hot water tank 12, in the hot water outlet 44 and on the heat exchanger 38, the functional elements of the heater, namely the Burner, pumps 46, 54 and 3-way valves 42, 46.

Das beschriebene Gerätekonzept arbeitet wie folgt:The described device concept works as follows:

Bei Brauchwasserentnahme, die einen Sensor, üblicherweise einen Differenzdrucksensor, der Zentralelektronik meldet, steht aus dem Brauchwasserspeicher 12 sofort Warmwasser in ausreichender Menge zur Überbrückung der Hochlaufzeit der Temperatur im Wärmeerzeuger 39 zur Verfügung. Über das 3-Wege-Ventil 42 wird in Verbindung mit dem zulaufenden Kaltwasser und der Brauchwasserpumpe 46 das auslaufende Brauchwasser auf den eingestellten Sollwert heruntergemischt. Gleichzeitig wird der Wärmeerzeuger 39 in Betrieb gesetzt und das 3-Wege-Ventil 42 derart aktiviert, daß ein zunehmender Anteil der durchlaufenden Brauchwassermengen über den Wärmeerzeuger 39 fließt. Sobald in diesem der Sollwert für das Brauchwasser erreicht wird, steuert das 3-Wege-Ventil 42 so um, daß die gesamte durchlaufende Brauchwassermenge im Durchlauferhitzerprinzip erwärmt wird.When hot water is drawn, which reports a sensor, usually a differential pressure sensor, to the central electronics, hot water is immediately available from the hot water tank 12 in sufficient quantity to bridge the run-up time of the temperature in the heat generator 39. Via the 3-way valve 42 in connection with the incoming cold water and the domestic water pump 46, the outgoing domestic water is mixed down to the setpoint. At the same time, the heat generator 39 is put into operation and the 3-way valve 42 is activated in such a way that an increasing proportion of the quantities of process water flowing through the heat generator 39 flows. As soon as the setpoint for the hot water is reached in this, the 3-way valve 42 reverses so that the total amount of hot water flowing through is heated in a water heater principle.

Die Regelung des Wärmeerzeugers kann entweder stetig oder im 2-Punkt-Betrieb erfolgen. Die Heizleistung wird unmittelbar, d.h. ohne Zwischenschaltung eines zusätzlichen Übertragungsmediums, auf das Brauchwasser im Warmwasserkreis 40a, 40b übertragen, so daß sich eine besonders kurze Hochlaufzeit der Brauchwassertemperatur ergibt. In Verbindung mit der bereits beschriebenen konstruktiven Ausgestaltung und einer entsprechenden Bemessung der Brennerleistung kann ohne nennenswerte Vergrößerung des Gerätevolumens der Brauchwasserkomfort einer Anlage mit externem Brauchwasserspeicher erreicht werden.The heat generator can be controlled either continuously or in 2-point operation. The heating power is transferred directly, ie without the interposition of an additional transmission medium, to the process water in the hot water circuit 40a, 40b, so that there is a particularly short run-up time for the process water temperature. In connection with the constructive design already described and a corresponding dimensioning of the burner output the domestic hot water comfort of a system with an external domestic hot water tank can be achieved without significantly increasing the volume of the device.

Nach Beendigung des Brauchwasserdurchlaufs wird die Temperatur im Brauchwasserspeicher 12 über den inneren Warmwasserkreis 40a, 40b mit hohem Übertragungswirkungsgrad auf den vom Temperaturfühler 64 überwachten Sollwert angehoben. Über den Brauchwasserspeicher 12 und den darin angeordneten Wärmeübertrager 50 wird die Wärmeenergie indirekt in das Heizungsnetz übertragen. Bei einem über den Temperaturfühler 62 im Heizungsvorlauf ermittelten Wärmebedarf wird das 3-Wege-Ventil 56 so aktiviert, daß es eine der Sollwertabweichung der Vorlauftemperatur entsprechende Aufteilung der Heizungswasser-Rücklaufmenge in die Beimischleitung 60 und den Wärmeübertrager 50 vornimmt. Dabei wird zunächst die Wärmeenergie im Brauchwasserspeicher 12 genutzt und der Brenner erst dann in Betrieb gesetzt, wenn der untere Schaltpunkt des Temperaturfühlers 64 erreicht ist. Der Wärmeübertrager 50 im Brauchwasserspeicher 12 ist so bemessen, daß er nur eine Teilleistung des Brenners auf das Heizungswasser zu übertragen vermag. Durch die Einbeziehung des Brauchwasserspeichers 12 in das geräteinterne Leitungssystem 52a, 52b, kann bei entsprechender Bemessung und Auslegung der Bau- und Steuerelemente erreicht werden, daß eine stetige Regelung des Brenners bei nahezu allen Wärmebedarfszuständen erfolgt. Durch das erfindungsgemäße Konzept sind ferner Vorlauftemperaturen im Bereich von 20 bis 80 Grad Celcius ohne Korrossionsprobleme möglich.After the process of hot water has ended, the temperature in the hot water tank 12 is raised to the desired value monitored by the temperature sensor 64 via the inner hot water circuit 40a, 40b with high transmission efficiency. The thermal energy is transferred indirectly into the heating network via the domestic water storage tank 12 and the heat exchanger 50 arranged therein. In the event of a heat requirement determined via the temperature sensor 62 in the heating flow, the 3-way valve 56 is activated in such a way that it divides the heating water return flow quantity into the mixing line 60 and the heat exchanger 50 in accordance with the setpoint deviation of the flow temperature. The thermal energy in the domestic hot water tank 12 is initially used and the burner is only started when the lower switching point of the temperature sensor 64 has been reached. The heat exchanger 50 in the domestic hot water tank 12 is dimensioned such that it can only transfer a partial output of the burner to the heating water. By including the domestic hot water tank 12 in the device-internal line system 52a, 52b, with appropriate dimensioning and design of the components and control elements, it can be achieved that the burner is continuously controlled in almost all heat demand conditions. The concept according to the invention also enables flow temperatures in the range from 20 to 80 degrees Celsius without corrosion problems.

Dem beschriebenen Ausführungsbeispiel liegen folgende Daten zugrunde: Brauchwasserleistung 28 kW Heizungsleistung 11 kW max. Brauchwassertempereatur 90 Grad Celcius max. Vorlauftemperatur Heizung 80 Grad Celcius Inhalt Brauchwasserspeicher 15 l Stickstoffvolumen-Ausdehnungsgefäß 8 l The exemplary embodiment described is based on the following data: Hot water output 28 kW Heating output 11 kW Max. Process water temperature 90 degrees Celcius Max. Flow temperature heating 80 degrees Celcius Content of domestic hot water tank 15 l Nitrogen volume expansion tank 8 l

Der konstruktive Aufbau des Ausführungsbeispiels nach Figur 4 stimmt grundsätzlich mit jenem des vorbeschriebenen ersten Auführungsbeispiels überein. Im Unterschied zu diesem hat das zweite Auführungsbeispiel jedoch einen Wärmeerzeuger 70 mit zwei Wärmeübertragern 72, 74 von denen mindestens der eine mit von den Verbrennungsgasen unmittelbar beaufschlagten Wärmeübertragungsflächen versehen ist und der andere mindestens mittelbar, über den Wasserinhalt des einen Wärmeübertragers, die Wärmeenergie von den Verbrennungsgasen erhält. Der Wärmeübertrager 72 liegt in einem internen Warmwasserkreis 76a, 76b, der durch einen mit einem Ausdehnungsgefäß 78 kombinierten Brauchwasserspeicher 80 hindurchführt und ein 3-Wege-Ventil 82 enthält, an welches ein Brauchwasserablauf 84 angeschlossen ist. Die Regelung der Temperatur im Brauchwasserablauf 84 erfolgt wie beim ersten Ausführungsbeispiel, auf dessen Beschreibung bezug genommen wird.The structural design of the exemplary embodiment according to FIG. 4 fundamentally corresponds to that of the first exemplary embodiment described above. In contrast to this, however, the second exemplary embodiment has a heat generator 70 with two heat exchangers 72, 74, at least one of which is provided with heat transfer surfaces directly acted upon by the combustion gases and the other at least indirectly, via the water content of the one heat exchanger, the thermal energy from the combustion gases receives. The heat exchanger 72 is located in an internal hot water circuit 76a, 76b, which leads through a hot water tank 80 combined with an expansion vessel 78 and contains a 3-way valve 82 to which a hot water outlet 84 is connected. The temperature in the process water outlet 84 is regulated as in the first exemplary embodiment, to the description of which reference is made.

Der zweite Wärmeübertrager 74 im Wärmeerzeuger 70 liegt in einem Leitungssystem 86a, 86b, für das Heizungswasser, dessen Vorlaufabschnitt 86a über ein Umsteuerventil 88 zu einem Geräteanschluß 90 für die Vorlaufleitung des Heizungsnetzes führt. Der Rücklaufabschnitt 86b des Leitungssystems geht von einem Geräteanschluß 92 für die Rücklaufleitug des Heizungsnetzes über eine Heizungswasserpumpe 94 zum Wärmeübertrager 74 und ist außerdem mit der Wasserkammer 96 des Ausdehnungsgefäßes 78 verbunden. Vom dritten Anschluß des Umsteuerventils 88 führt eine Beimischleitung 98 durch den Brauchwasserspeicher 80 zum Rücklaufabschnitt 86b. Im Brauchwasserspeicher 80 ist die Beimischleitung 98 zu einer einen Wärmeübertrager 100 bildenden Rohrwendel geformt.The second heat exchanger 74 in the heat generator 70 is located in a line system 86a, 86b, for the heating water, the flow section 86a of which leads via a reversing valve 88 to a device connection 90 for the flow line of the heating network. The return section 86b of the line system goes from a device connection 92 for the return line of the heating network via a heating water pump 94 to the heat exchanger 74 and is also connected to the water chamber 96 of the expansion vessel 78. From the third connection of the reversing valve 88, an admixing line 98 leads through the service water tank 80 to the return section 86b. In the domestic hot water tank 80, the admixing line 98 is shaped to form a coiled tubing forming a heat exchanger 100.

Bei der Anordnung nach Figur 4 erfogt eine indirekte Wärmeübertragung von Heizungswärme über den Brauchwasserspeicher 80 nur, solange dessen Temperatur über dem eingestellten Sollwert von z.B. 90 Grad Celcius liegt. Darunter wird der Wärmeerzeuger 70 zugeschaltet, der danach sowohl den Heizungswärmebedarf deckt, als auch die Brauchwassertemperatur im Brauchwasserspeicher 80 wieder auf den Sollwert anhebt. Bei der Anordnung nach Figur 4 kann eine Pumpe im Warmwasserkreis 76a. 76b entfallen. Der Erhaltungswärmebedarf des Brauchwasserspeichers 80 kann vorteilhaft bei Wasserstillstand im Warmwasserkreis 76a, 76b allein über die Wärmeübertrager 74 und 100 im Leitungssystem für das Heizungswasser gedeckt werden.In the arrangement according to FIG. 4, indirect heat transfer from heating heat via the domestic hot water tank 80 only takes place as long as its temperature is above the set setpoint of e.g. 90 degrees Celcius is. Below this, the heat generator 70 is switched on, which then covers both the heating demand and also raises the hot water temperature in the hot water tank 80 to the setpoint. In the arrangement according to FIG. 4, a pump in the hot water circuit 76a. 76b are omitted. The maintenance heat requirement of the domestic hot water tank 80 can advantageously be met when the water in the hot water circuit 76a, 76b is at a standstill solely via the heat exchangers 74 and 100 in the line system for the heating water.

Claims (9)

  1. Heating appliance for room heating and domestic-water production, having a burner as a heat source, having a heat exchanger (38, 72), acted upon by the combustion gases, in an inner hot-water circuit (40a, 40b, 76a, 76b) which leads through a domestic-water storage tank (12, 80), furthermore having a heating-water-channelling line system which connects a return connection for a heating system to a flow connection via a heat exchanger (50, 100, 74), characterized in that the heat exchanger (50, 100, 74) located in the heating-water-channelling line system (52a, 52b, 86a, 86b) is provided with exchanging surfaces (50, 100) which are arranged in the domestic-water storage tank (12, 80) and are surrounded by the domestic water, in that heat exchange to the heating water takes place in a controlled manner via the domestic-water storage tank (12, 80), without operation of the burner, at least for as long as the water temperature of said storage tank exceeds a predetermined value, and in that the heat transfer from the heat exchanger (38, 72), acted upon by the combustion gases, into the domestic-water storage tank (12, 80) takes place, without interposition of an additional exchange medium, directly by way of domestic water itself which flows in the inner hot-water circuit (40a, 40b, 76a, 76b).
  2. Heating appliance according to Claim 1, characterized in that only the heat exchanger (50) in the domestic-water storage tank (12) is provided for the purpose of heating the heating water, and the supply of heat to the heating water takes place exclusively indirectly via the domestic-water storage tank (12).
  3. Heating appliance according to Claim 1, characterized in that a second heat exchanger (74), which is arranged parallel to the heat exchanger (100) in the domestic-water storage tank (80) and is acted upon directly by the combustion gases, is provided for the purpose of heating the heating water, which second heat exchanger (74) is included in the line system (86a, 86b) for the heating water at least for as long as the water temperature in the domestic-water storage tank (80) falls below a predetermined value.
  4. Heating appliance according to Claim 3, characterized in that the supply of heat to the domestic-water storage tank (80), said supply of heat being necessary for maintaining the temperature in said storage tank, takes place via the two heat exchangers (74, 100) in the line system (86a, 86b) for the heating water.
  5. Heating appliance according to one of the preceding claims, having an expansion tank which is connected to the line system for the heating water, characterized in that the domestic-water storage tank (12, 80) and the expansion tank (10, 78) are combined to form a module (14) arranged on the rear side of the appliance.
  6. Heating appliance according to Claim 5, characterized in that the module (14), comprising domestic-water storage tank (12, 80) and expansion tank (10, 78), is designed as a mounting panel for the rest of the components or units, such as gas and water fittings, pumps, valves, burner, combustion chamber, heat exchanger, flow-ensuring means, blower and central electronics.
  7. Heating appliance according to Claim 6, characterized in that the module (14) directly forms the load-bearing appliance framework, which is provided with means (16) for fastening on a wall.
  8. Heating appliance according to one of Claims 5 to 7, characterized in that components or units which are closely functionally related to one another and/or are connected by lines are combined to produce prefabricated subassemblies (20, 22, 24, 26) which are fastened, or can be fastened, individually on the module (14), which preferably also exhibits some of the pipework.
  9. Heating appliance according to one of Claims 5 to 8, characterized in that the appliance connections for gas (28), cold water (30), domestic water (32) and for the heating system (34, 36) and preferably also means (18) for centring and securing a casing are provided on the module (14).
EP92119597A 1991-12-21 1992-11-17 Heater for room heating and domestic water production Expired - Lifetime EP0548536B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4142547 1991-12-21
DE4142547A DE4142547C2 (en) 1991-12-21 1991-12-21 Heater for space heating and domestic hot water preparation

Publications (2)

Publication Number Publication Date
EP0548536A1 EP0548536A1 (en) 1993-06-30
EP0548536B1 true EP0548536B1 (en) 1996-04-17

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EP92119597A Expired - Lifetime EP0548536B1 (en) 1991-12-21 1992-11-17 Heater for room heating and domestic water production

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EP (1) EP0548536B1 (en)
DE (2) DE4142547C2 (en)
ES (1) ES2086618T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT401572B (en) * 1993-03-17 1996-10-25 Rapido Waermetechnik Gmbh CONDENSATION HEATER
DE19911237C2 (en) * 1999-03-15 2001-02-08 Danfoss As Heating system and method for its operation
AT410023B (en) * 1999-09-24 2003-01-27 Vaillant Gmbh WATER HEATING SYSTEM
EP2413046B1 (en) * 2010-07-30 2016-03-30 Grundfos Management A/S domestic water heating unit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2147397A5 (en) * 1971-07-26 1973-03-09 Chaffoteaux Et Maury
DE2911654A1 (en) * 1979-03-24 1980-10-02 Bosch Gmbh Robert Gas or oil fired central heating boiler - has heating and service water pipe groups in laminar block burner chamber
GB2130347B (en) * 1982-11-16 1986-05-21 Cosybug Limited Heating installaton
FR2595454B1 (en) * 1986-03-07 1989-01-13 Elettro Termica Sud Spa GAS BOILER
AT393316B (en) * 1989-10-04 1991-09-25 Vaillant Gmbh METHOD FOR CONTROLLING THE CONTINUOUS OPERATION IN THE WATER TAP ON A WALL HEATER AND DEVICE FOR IMPLEMENTING THE METHOD

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EP0548536A1 (en) 1993-06-30
DE59206043D1 (en) 1996-05-23
DE4142547A1 (en) 1993-06-24
DE4142547C2 (en) 1993-11-25
ES2086618T3 (en) 1996-07-01

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