EP0548536A1 - 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
EP0548536A1
EP0548536A1 EP92119597A EP92119597A EP0548536A1 EP 0548536 A1 EP0548536 A1 EP 0548536A1 EP 92119597 A EP92119597 A EP 92119597A EP 92119597 A EP92119597 A EP 92119597A EP 0548536 A1 EP0548536 A1 EP 0548536A1
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EP
European Patent Office
Prior art keywords
heating
water
hot water
heat exchanger
heater
Prior art date
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Granted
Application number
EP92119597A
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German (de)
French (fr)
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EP0548536B1 (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, which are designed so that they supply domestic water in sufficient quantities without any significant initial delay with the desired temperature, so that the installation of an external domestic hot water tank is unnecessary.
  • a known heater of this type DE-OS 40 31 187
  • the heat exchanger directly acted upon by the combustion gases flows through the heating water and the hot water circuit led through the device's internal hot water tank branches off from the pipe system for the heating water.
  • an additional tank is arranged, which is connected to the hot water tank via two pipes.
  • This version is relatively complex and requires additional installation space which undesirably increases the volume of the heater.
  • 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 simple arrangement with a particularly high degree of efficiency is obtained if the heat transfer from the heat exchanger acted upon by the combustion circuits into the domestic hot water tank takes place directly through the domestic hot water circuit itself, without the interposition of an additional transmission medium.
  • a 3-way valve, which is influenced by the water temperature in the process water outlet, can be arranged on the branch of the process water drain from which the process water-carrying internal hot water circuit, which initially supplies the process water primarily from the process water tank and then increasingly directly from the heat exchanger charged by the combustion circuits into the process water outlet lets flow.
  • only the heat exchanger in the service water tank is provided for heating the heating water, the heat supply to the heating water taking place exclusively indirectly via the service water tank.
  • a second heat exchanger which is arranged parallel to the heat exchanger in the domestic hot water tank and is directly acted upon by the combustion gases, and which is at least as long as possible in the piping system for the heating water, while accepting a somewhat higher cost for heating 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 piping system of the heating water.
  • 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 assembly 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 application 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 or attached to the structural unit that preferably also has 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, and 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 back 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 assembly 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 assemblies 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 pipelines, some of which are in the assemblies themselves and some are in 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 includes a gas fitting 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 hot water tank 12 in an inner hot water circuit 40 a, 40 b through which hot 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 designed as a coil, are arranged in the interior of the domestic hot water 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 back to the heat exchanger 50 and is also connected to the water chamber 58 of the expansion vessel 10.
  • An admixing 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 as well as 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.
  • the described device concept works as follows: When hot water is drawn, which reports a sensor, usually a differential pressure sensor, to the central electronics, hot water is immediately available in sufficient quantity from the hot water tank 12 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 such that the entire amount of hot water flowing through is heated in a water heater principle.
  • the heat generator can be regulated 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 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 indirectly transferred into the heating network via the domestic hot water 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 inventive concept also allows 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 hot 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)

Abstract

In a known heater of the generic type, a heat exchanger arranged in a domestic water storage tank is connected in parallel with the two appliance connections for the heating network and an additional storage tank is provided next to the domestic water storage tank in order to compensate the output deficit of the heat source of the heater at the beginning of domestic water tapping. As a result of the series connection according to the invention of an internal, domestic water-bearing hot water circuit 40a, 40b to the pipe system 52a, 52b for the heating water, as well as its heating taking place directly via the hot water circuit 52a, 52b, the output/volume ratio of the heater can be optimised and the domestic water convenience of an installation with externally installed domestic water storage tank can be achieved. Preferred area of application is heaters with a gas burner as heat source. <IMAGE>

Description

Stand der TechnikState of the art

Die Erfindung geht aus von Heizgeräten nach der Gattung des Hauptanspruchs, die so ausgelegt sind, daß sie Brauchwasser ohne nennenswerte Anfangsverzögerung mit der gewünschten Temperatur in ausreichender Menge liefern, so daß sich die Installation eines externen Brauchwasserspeichers erübrigt. Bei einem bekannten Heizgerät dieser Gattung (DE-OS 40 31 187) ist wie üblich der von den Verbrennungsgasen unmittelbar beaufschlagte Wärmeübertrager vom Heizungswasser durchflossen und der durch den geräteinternen Brauchwasserspeicher hindurchgeführte Warmwasserkreis vom Leitungssystem für das Heinzungswasser abgezweigt. Um die vorstehend aufgeführten Komfortmerkmale der Brauchwasserbereitug zu erreichen, ist beim bekannten Heizgerät u.a. 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, which are designed so that they supply domestic water in sufficient quantities without any significant initial delay with the desired temperature, so that the installation of an external domestic hot water tank is unnecessary. In a known heater of this type (DE-OS 40 31 187), as is usual, the heat exchanger directly acted upon by the combustion gases flows through the heating water and the hot water circuit led through the device's internal hot water tank branches off from the pipe system for the heating water. In order to achieve the comfort features of hot water preparation listed above, in the known heater, in addition to the 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 hot water tank via two pipes. This version is relatively complex and requires additional installation space which undesirably increases the volume of the heater.

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 aufgestelltem 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.

Durch die in den Unteransprüchen aufgeführten Merkmale sind vorteilhafte Weiterbildungen der Anordnung nach dem Hauptanspruch möglich. Eine einfache Anordnung mit besonders hohem Wirkungsgrad ergibt sich, wenn der Warmetransport aus dem von den Verbrennungskreisen beaufschlagten Wärmeübertrager in den Brauchwasserspeicher ohne Zwischenschaltung eines zusätzlichen Übertragungsmediums unmittelbar durch den inneren Warmwasserkreis fließendes Brauchwasser selbst erfolgt. Dabei kann ein u.a. von der Wassertemperatur im Brauchwasserablauf beeinflußtes 3-Wege-Ventil am Abzweig des Brauchwasserablaufs von dem das brauchwasserführenden internen Warmwasserkreis angeordnet sein, welches das Brauchwasser zunächst überwiegend aus dem Brauchwasserspeicher und dann zunehmend unmittelbar aus dem von den Verbrennungskreisen beaufschlagten Wärmeübertrager in den Brauchwasserablauf fließen läßt.Advantageous further developments of the arrangement according to the main claim are possible due to the features listed in the subclaims. A simple arrangement with a particularly high degree of efficiency is obtained if the heat transfer from the heat exchanger acted upon by the combustion circuits into the domestic hot water tank takes place directly through the domestic hot water circuit itself, without the interposition of an additional transmission medium. A 3-way valve, which is influenced by the water temperature in the process water outlet, can be arranged on the branch of the process water drain from which the process water-carrying internal hot water circuit, which initially supplies the process water primarily from the process water tank and then increasingly directly from the heat exchanger charged by the combustion circuits into the process water outlet lets flow.

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 taking place exclusively indirectly via the service water tank. These measures result in a particularly simple construction with little piping, which makes a particularly compact design of the heater possible.

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 domestic hot water tank and is directly acted upon by the combustion gases, and which is at least as long as possible in the piping system for the heating water, while accepting a somewhat higher cost for heating 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 piping 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.The arrangements described above can be supplemented according to the invention with purely constructive measures regarding 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 assembly 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 application 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 or attached to the structural unit that preferably also has 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. 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, 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 back 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 assembly 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 assemblies 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 pipelines, some of which are in the assemblies themselves and some are in 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 includes a gas fitting 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 hot water tank 12 in an inner hot water circuit 40 a, 40 b through which hot 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 designed as a coil, are arranged in the interior of the domestic hot water 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 back to the heat exchanger 50 and is also connected to the water chamber 58 of the expansion vessel 10. An admixing 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 as well as 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:
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 eingstellten 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.The described device concept works as follows:
When hot water is drawn, which reports a sensor, usually a differential pressure sensor, to the central electronics, hot water is immediately available in sufficient quantity from the hot water tank 12 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 such that the entire 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 regulated 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 Wäremeenergie 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 indirectly transferred into the heating network via the domestic hot water 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, it can be achieved, with appropriate dimensioning and design of the components and control elements, that the burner is continuously regulated in almost all heat demand conditions. The inventive concept also allows 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 hot 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 requirements 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 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 (10)

Heizgerät für Raumheizung und Brauchwasserbereitung, mit einem Brenner als Wärmequelle, einem von den Verbrennungsgasen beaufschlagten Warmeübertrager in einem inneren Warmwasserkreis, der durch einen Brauchwasserspeicher führt, ferner mit einem heizungswasserführenden Leitungssystem, das einen Rücklaufanschluß für ein Heizungsnetz über einen Wärmeübertrager mit einem Vorlaufanschluß verbindet, dadurch gekennzeichnet, daß ein im heizungswasserführenden Leitungssystem (52a, 52b, 86a, 86b) liegender Wärmeübertrager mit im Brauchwasserspeicher (12, 80) angeordneten, vom Brauchwasser umgebenen Übertragungsflächen (50, 100) versehen ist und daß ein Wärmeübergang auf das Heizungswasser mindestens so lange über den Brauchwasserspeicher (12, 80) erfolgt, als dessen Wassertemperatur einen vorgegebenen Wert überschreitet.Heater for space heating and domestic hot water preparation, with a burner as a heat source, a heat exchanger in an internal hot water circuit, which is exposed to the combustion gases, which leads through a domestic hot water tank, furthermore with a heating water pipe system that connects a return connection for a heating network via a heat exchanger with a flow connection, thereby characterized in that a heat exchanger located in the heating water piping system (52a, 52b, 86a, 86b) is provided with transfer surfaces (50, 100) arranged in the hot water tank (12, 80) and surrounded by the hot water and that heat transfer to the heating water lasts at least as long the domestic hot water tank (12, 80) takes place when its water temperature exceeds a predetermined value. Heizgerät nach Anspruch 1, dadurch gekennzeichnet, daß der Wärmetrransport aus dem von den Verbrennungsgasen beaufschlagten Wärmeübertrager (38, 72) in den Brauchwasserspeicher (12, 80) ohne Zwischenschaltung eines zusätzlichen Übertragungsmediums umittelbar durch im inneren Warmwasserkreis (40a, 40b, 76a, 76b) fließendes Brauchwasser selbst erfolgt.Heating device according to claim 1, characterized in that the heat transport from the heat exchanger (38, 72) acted upon by the combustion gases into the process water tank (12, 80) without the interposition of an additional transmission medium directly by means of the inner hot water circuit (40a, 40b, 76a, 76b) running hot water itself. Heizgerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß für die Erwärmung des Heizungswassers allein der Wärmeübertrager (50) im Brauchwasserspeicher (12) vorgesehen ist und die Wärmezufuhr zum Heizungswasser ausschließlich mittelbar über den Brauchwasserspeicher (12) erfolgt (Figur 3).Heating device according to claim 1 or 2, characterized in that only the heat exchanger (50) is provided in the service water tank (12) for heating the heating water and the heat supply to the heating water takes place exclusively indirectly via the service water tank (12) (Figure 3). Heizgerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß für die Erwärmung des Heizungswassers ein parallel zu dem Wärmeübertrager (100) im Brauchwasserspeicher (80) angeordneter, von den Verbrennungsgasen unmittelbar beaufschlagter zweiter Wärmeübertrager (74) vorgesehen ist, der mindestens so lange in das Leitungssystem (80a, 80b) für das Heizungswasser einbezogen ist, als die Wassertemperatur im Brauchwasserspeicher (80) einen vorgegebenen Wert unterschreitet (Figur 4).A heater according to claim 1 or 2, characterized in that for heating the heating water there is provided a second heat exchanger (74) which is arranged in parallel to the heat exchanger (100) in the service water tank (80) and is acted upon directly by the combustion gases and which at least as long remains in the Pipe system (80a, 80b) for the heating water is included when the water temperature in the water heater (80) falls below a predetermined value (Figure 4). Heizgerät nach Anspruch 4, dadurch gekennzeichnet, daß über die beiden Wärmeübertrager (74, 100) im Leitungssystem (80a, 80b) für das Heizungswasser die für die Speichertemperaturerhaltung notwendige Wärmezufuhr zum Brauchwasserspeicher (80) erfolgt.Heater according to claim 4, characterized in that the heat supply necessary for maintaining the storage temperature is supplied to the domestic water storage (80) via the two heat exchangers (74, 100) in the line system (80a, 80b) for the heating water. Heizgerät nach einem der vorhergehenden Ansprüche, mit einem an das Leitungssystem für das Heizungswasser angeschlossenen Ausdehnungsgefäß, dadurch gekennzeichnet, daß der Brauchwasserspeicher (12, 80) und das Ausdehnungsgefäß (10, 78) zu einer an der Geräterückseite angeordneten Baueinheit (14) zusammengefasst sind.Heater according to one of the preceding claims, with an expansion vessel connected to the line system for the heating water, characterized in that the domestic water tank (12, 80) and the expansion vessel (10, 78) are combined to form a structural unit (14) arranged on the rear of the appliance. Heizgerät nach Anspruch 6, dadurch gekennzeichnet, daß die aus Brauchwasserspeicher (12, 80) und Ausdehnungsgefäß (10, 78) bestehende Baueinheit (14) als Montageplatte für die übrigen Bauelemente bzw. Aggregate, wie Gas- und Wasserarmaturen, Pumpen, Ventile, Brenner, Brennkammer, Wärmetauscher, Strömungssicherung, Gebläse und Zentralelektronik, ausgebildet ist.A heater according to claim 6, characterized in that the structural unit (14) consisting of the service water reservoir (12, 80) and expansion vessel (10, 78) serves as a mounting plate for the other components or units, such as gas and water fittings, pumps, valves, burners , Combustion chamber, heat exchanger, flow protection, Blower and central electronics. Heizgerät nach Anspruch 7, dadurch gekennzeichnet, daß die Baueinheit (14) unmittelbar das Tragende, mit Mitteln (16) zum Befestigen an einer Wand versehene, Gerätegestell bildet.Heating device according to claim 7, characterized in that the structural unit (14) directly forms the supporting end, provided with means (16) for fastening to a wall, device frame. Heizgerät nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß miteinander in engem Funktionszusammenhang stehende und/oder durch Leitungen verbundene Bauelemente bzw. Aggregate zu vorgefertigten Baugruppen (20, 22, 24, 26) zusammengefaßt sind, die einzeln für sich an der vorzugsweise auch einen Teil der Verrohrung aufweisenden Baueinheit 14 befestigt bzw. befestigbar sind.Heater according to one of claims 6 to 8, characterized in that components or assemblies which are closely related to one another and / or connected by lines are combined to form prefabricated assemblies (20, 22, 24, 26) which are preferably individually connected to one another also part of the piping unit 14 are attached or can be attached. Heizgerät nach einem der Ansprüche 6 bis 9, dadurch gekennzeichnet, daß an der Baueinheit (14) die Geräteanschlüsse für Gas (28), Kaltwasser (30), Brauchwasser (32) und für das Heizungsnetz (34, 36), sowie vorzugsweise auch Mittel (18) zum Zentrieren und Festhalten einer Mantelschale vorgesehen sind.Heating device according to one of claims 6 to 9, characterized in that the device connections for gas (28), cold water (30), service water (32) and for the heating network (34, 36), and preferably also means, on the structural unit (14) (18) are provided for centering and holding a shell.
EP92119597A 1991-12-21 1992-11-17 Heater for room heating and domestic water production Expired - Lifetime EP0548536B1 (en)

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DE4142547A DE4142547C2 (en) 1991-12-21 1991-12-21 Heater for space heating and domestic hot water preparation

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT410023B (en) * 1999-09-24 2003-01-27 Vaillant Gmbh WATER HEATING SYSTEM
EP2413046A1 (en) * 2010-07-30 2012-02-01 Grundfos Management A/S Domestic water heating unit
CN102345929A (en) * 2010-07-30 2012-02-08 格伦德福斯管理联合股份公司 Service water heating unit
CN102345929B (en) * 2010-07-30 2016-04-20 格伦德福斯管理联合股份公司 Domestic water heating unit
US9328941B2 (en) 2010-07-30 2016-05-03 Grundfos Management A/S Service water heating unit having heat exchangers and circulation pumps

Also Published As

Publication number Publication date
DE4142547C2 (en) 1993-11-25
DE4142547A1 (en) 1993-06-24
ES2086618T3 (en) 1996-07-01
EP0548536B1 (en) 1996-04-17
DE59206043D1 (en) 1996-05-23

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