EP0905453A2 - Domestic hot water heater - Google Patents

Domestic hot water heater Download PDF

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Publication number
EP0905453A2
EP0905453A2 EP98110530A EP98110530A EP0905453A2 EP 0905453 A2 EP0905453 A2 EP 0905453A2 EP 98110530 A EP98110530 A EP 98110530A EP 98110530 A EP98110530 A EP 98110530A EP 0905453 A2 EP0905453 A2 EP 0905453A2
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EP
European Patent Office
Prior art keywords
hot water
heat exchanger
water tank
secondary heat
heating
Prior art date
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Granted
Application number
EP98110530A
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German (de)
French (fr)
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EP0905453B2 (en
EP0905453A3 (en
EP0905453B1 (en
Inventor
Albin Kehl
Manfred Oehrlein
Uwe Lindemann
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Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • F24D3/087—Tap water heat exchangers specially adapted therefore
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0093—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids

Definitions

  • the invention is based on a water heater the genus of the main claim.
  • Water heater this Genus as e.g. in heaters from Central heating systems are built in increased convenience of hot water because when tapping Domestic hot water is immediately available.
  • a hot water tank as a separate unit trained over pipes with the secondary heat exchanger connected is.
  • This version claims proportionately a lot of installation space that is required for heaters of the type mentioned above is scarce. Because of the pipe connections thermal contact between the hot water tank and Secondary heat exchanger only limited and the arrangement of one separate hot water tank is also proportionate expensive.
  • the arrangement according to the invention with the features of The main claim results in a compact and space-saving Unit in which the thermal contact between the Storage volume and the secondary heat exchanger significantly is improved and the connection and Heat transfer elements in the heat exchanger plates are function-integrable. This also results in a significant cost savings compared to a separate one Hot water tank, which is expensive with the Secondary heat exchanger must be connected.
  • the cooling losses of the hot water tank can be reduced if this in the course of Domestic water pipe is because the temperature of stored domestic water less than the temperature of stored heating water can be kept.
  • the aspiration according to the most compact design possible, is met if the hot water tank is also made of panels is. This is also a particularly tight thermal Connection of the hot water tank to the Secondary heat exchanger possible.
  • the hot water tank can be used to save space Secondary heat exchanger must be attached.
  • the hot water tank is designed as a basic body the unit trained secondary heat exchanger comprehensively trained. This results in great ones Contact areas between the two modules and the further advantage that the waste heat from the secondary heat exchanger to the ambient air due to the standing Storage volume, is less than a one-sided Attachment of the hot water tank to the plate stack of the Secondary heat exchanger.
  • a particularly close contact between the hot water tank and Secondary heat exchanger results when the storage volume of the hot water tank in the secondary heat exchanger is integrated.
  • Hot water storage tank A "shooting" of the service or heating water through the Hot water storage tank is avoided if the Hot water storage tank in individual, connected in series Areas are divided by the water one by one be flowed through.
  • FIG. 1 shows a simplified Representation of the common to all embodiments Basic structure
  • Figures 2 to 4 each have a cross section the first, second and third embodiment
  • Figure 5 enlarged a detail from Figure 4
  • Figure 6 the Bottom view of a fourth embodiment
  • the Figures 7 and 8 each have a cross section through the fifth and sixth embodiment.
  • All of the embodiments have one from a heat source 10 heated primary heat exchanger 11 in a heating water network 12, the one via a circulation pump 13 and one Secondary heat exchanger and a hot water tank existing unit 14 leads, the heat from the heating water transfers to the water in a service water pipe 15.
  • the hot water tank is in close thermal contact with the plate construction Secondary heat exchanger and can be used both for storage of domestic water, as well as heating water, or both be provided.
  • a Secondary heat exchanger 18 through a stack of plates 19th formed, the 20 tight at their erected edges are interconnected and changing channels a for Limit heating water and channels b for process water.
  • the Channels a and b are connected in parallel connected via passages 21, 22 which through appropriate shape of the plates 19 formed and against the intermediate, the other fluid leading Channels are sealed.
  • a Connection piece 23 for one strand of the heating water network 12 attached, which leads into the passages 21. Removed from Connection piece 23 and not visible in the drawing is a second group of passages connecting the channels a and a corresponding connection piece for the another strand of the heating water network 12 is arranged.
  • the incoming strand of the domestic water pipe 15 is in a hot water tank 25 performed on the Secondary heat exchanger 18 is placed and with this one Unit forms.
  • a connecting piece 26 on the secondary heat exchanger 18th and a tube 27 provided through the passages 22 in the hot water tank 25 is guided.
  • the tube 27 extends therein to a location 28 which removes is arranged by the group of passages 22 whose top immediately opens into the hot water tank 25. Removed from the connector 26 and not in the drawing a second group of channels b is visible connecting passages and a corresponding one Connection piece for the further strand of Service water line 15 arranged.
  • the hot water tank 25 is in a large area close thermal contact with the plate 19 of the Secondary heat exchanger 18 which the upper heating water channel a limited.
  • the flow in the hot water tank 25 is on this plate 19 inevitably led along and the exit of the hot water tank 25 opens out in the shortest possible way, i.e. directly into the group of service water channels b.
  • the Storage volume is due to the already existing Heat exchanger function heated up, so that an additional There is no heat exchanger for the domestic hot water tank.
  • FIG. 3 corresponds to that according to FIG. 2 except for the feature that the hot water tank 25th between two heating water channels a of the secondary heat exchanger is arranged so that there is an even more intense thermal contact between the heating water and the Hot water in the hot water tank 25 results.
  • the hot water tank could also be exemplary embodiments be arranged on the heating water side.
  • the Hot water tank even deeper in the plate stack of the Secondary heat exchanger, so that it is both from the heating water process water is also washed around in the secondary heat exchanger.
  • a Secondary heat exchanger 30 a base body by a also made in panel construction Domestic hot water tank 31 is included.
  • the Secondary heat exchanger 30 is on the underside Connections for the heating network 12 connected, of which one, 32, lies in the plane of the drawing and the other, not visible in the drawing, arranged away from it is.
  • the internal structure of the secondary heat exchanger 30 is correct corresponds to that of Figure 2, so that not is received.
  • the hot water tank 31 is with a Connection piece 33 for the incoming strand of Process water line 15 connected to an annular chamber 34 opens out, through which two further annular chambers 35, 36 are arranged.
  • the annular chambers 34, 35, 36 are by plates 37, 38, 39, 40 limited, which is integral with the plates of the Secondary heat exchanger 30 are connected. This is a excellent thermal contact between the two Assemblies given.
  • the annular chamber 34 is with the annular chamber 35 via an opening not visible in the drawing in the Plate 38 connected to the connecting piece 33 approximately diagonally opposite.
  • the annular chamber 35 is a Opening 41 in the plate 39 connected to the annular chamber 36, which is arranged approximately coaxially to the connecting piece 33.
  • the annular chamber 40 is attached to the plate 39 and pipe passed through the other plates 38, 37 42 connected to a chamber 43 which is between the lower Plate 37 and a hood 44 attached thereto is formed.
  • the hood 44 extends in the area of Secondary heat exchanger 30 and engages there in the one Plate 37 arranged opening 45 through which the inflowing Service water enters the service water channels b.
  • the alternative solution shown in Figure 6 for execution 4 has a secondary heat exchanger as the base body 50, which is enclosed by a heating water tank 51.
  • the secondary heat exchanger 50 On the bottom is the secondary heat exchanger 50 with Connections 52, 53 for the hot water pipe 15 and one Provide connection 54 for the heating network 12.
  • the inner one Structure of the secondary heat exchanger 50 and Domestic hot water tank 31 corresponds to the version Figure 4.
  • the heating water tank 51 has a connection 55 for the second strand of the heating network 12, which in the lower Annulus 34 opens. This is via an opening 56 in the cover plate with the overlying ring chamber 35 connected, one of which is approximately coaxial with the terminal 55 arranged opening leads into the third annular chamber 36.
  • connection 55 there is a pipe 42 in FIG. 4 corresponding channel 57 is provided, the third Annular chamber 36 to the underside of the heating water tank 51 leads.
  • the channel 57 through a hood 58 with a Opening 59 in the bottom plate of the Secondary heat exchanger 50 connected to the input whose heating water channels forms.
  • the special thing about the Execution according to Figure 6 is that between the Connection piece 50 and the underlying, the Annular chambers 35 and 36 connecting opening on the one hand and the leading from the annular chamber 34 into the annular chamber 35 Opening 56 on the other hand a partition 60 is provided, which penetrates all annular chambers and for example through appropriate embossing of the plates is formed.
  • the Partition 60 forces one through in each annular chamber dashed line 61 indicated ring flow of the Heating water, which in the annular chambers 34 and 36 in Clockwise and in the annular chamber 35 against Runs clockwise. This makes it a particularly intense one Heat exchange between the heating water and the domestic water reached.
  • FIG. 7 In the embodiment of Figure 7 are inside of a secondary heat exchanger 64 two storage spaces 65 and 66 integrated for process water, which at a connection piece 67 is supplied, the storage spaces 65, 66 in succession runs through and then in the parallel Service water channels b reaches the secondary heat exchanger. Out the process water flows through one in the drawing not visible, lying behind the connecting piece 67 Connection piece in the continuing strand of Service water line 15 from.
  • the connections for the heating water and the internal connections of the parallel ones Heating water channels are in the drawing of simplicity omitted for the sake of it.
  • the arrangement could also be so be that the storage spaces 65, 66 in the course of Heating water network and that as in Figure 4 individual Protruding plates with tongues into the storage spaces 65, 66.
  • the embodiment of Figure 8 has one Secondary heat exchanger 70, on which a hot water tank 71st is attached, which is also carried out in panel construction is and both heating water channels a and Service water ducts b contains.
  • the hot water channels b are in the hot water tank 71 in series and in Secondary heat exchanger 70 connected in parallel.
  • the Heating water channels a are parallel in both assemblies 70, 71 switched.
  • the channels a, b in the hot water tank 71 are internally with channels a, b in secondary heat exchanger 70 connected, so that in this case also special means and Measures for this are not required.
  • the hot water tank 71 has a connection piece 72 for the incoming strand of the domestic water pipe 15 and one Connection piece 73 for the heating network 12.
  • the Secondary heat exchanger 70 is with a connecting piece 74 for the heating network 12 and a connection 75 for the Continuing strand of the domestic water line 15 provided.
  • the embodiment according to FIG. 8 is characterized by a particularly fast thermal coupling of the memory the secondary heat exchanger.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Water Supply & Treatment (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Thermally Insulated Containers For Foods (AREA)
  • Cookers (AREA)
  • Resistance Heating (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

The secondary heat exchanger connects thermally a user water conduit to the hot water mains. A hot water accumulator compensates for the time loss caused by the heating of the primary heat exchanger. The hot water accumulator (35,31) is in close thermal contact with the plates of the secondary heat exchanger (30), forming a structural unit with it.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Brauchwasserbereiter nach der Gattung des Hauptanspruchs. Brauchwasserbereiter dieser Gattung, wie sie z.B. in Heizgeräten von Zentralheizungsanlagen eingebaut sind, zeichnen sich durch einen erhöhten Brauchwasserkomfort aus, weil beim Zapfen von Brauchwasser sofort warmes Wasser zur Verfügung steht. Bei bekannten Brauchwasserbereitern der gattungsmäßigen Art ist ein Warmwasserspeicher als eine getrennte Baueinheit ausgebildet, die über Rohre mit dem Sekundärwärmetauscher verbunden ist. Diese Ausführung beansprucht verhältnismäßig viel Einbauraum, der bei Heizgeräten der obengenannten Art nur knapp bemessen ist. Wegen der Rohrverbindungen ist der thermische Kontakt zwischen Warmwasserspeicher und Sekundärwärmetauscher nur begrenzt und die Anordnung eines separaten Warmwasserspeichers ist auch verhältnismäßig kostenintensiv.The invention is based on a water heater the genus of the main claim. Water heater this Genus as e.g. in heaters from Central heating systems are built in increased convenience of hot water because when tapping Domestic hot water is immediately available. At known water heaters of the generic type a hot water tank as a separate unit trained over pipes with the secondary heat exchanger connected is. This version claims proportionately a lot of installation space that is required for heaters of the type mentioned above is scarce. Because of the pipe connections thermal contact between the hot water tank and Secondary heat exchanger only limited and the arrangement of one separate hot water tank is also proportionate expensive.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Anordnung mit den Merkmalen des Hauptanspruchs ergibt eine kompakte und platzsparende Baueinheit, bei welcher der thermische Kontakt zwischen dem Speichervolumen und dem Sekundärwärmetauscher erheblich verbessert ist und die Verbindungs- und Wärmeübertragungselemente in die Wärmetauscherplatten funktionsintegrierbar sind. Dadurch ergibt sich auch eine wesentliche Kostenersparnis im Vergleich zu einem separaten Warmwasserspeicher, der aufwendig mit dem Sekundärwärmetauscher verbunden werden muß.The arrangement according to the invention with the features of The main claim results in a compact and space-saving Unit in which the thermal contact between the Storage volume and the secondary heat exchanger significantly is improved and the connection and Heat transfer elements in the heat exchanger plates are function-integrable. This also results in a significant cost savings compared to a separate one Hot water tank, which is expensive with the Secondary heat exchanger must be connected.

Durch die in den Unteransprüchen aufgeführten Merkmale sind vorteilhafte Ausgestaltungen und Weiterbildungen der Anordnung nach dem Hauptanspruch möglich.By the features listed in the subclaims advantageous refinements and developments of Arrangement possible according to the main claim.

Die Auskühlverluste des Warmwasserspeichers können verringert werden, wenn dieser im Zuge der Brauchwasserleitung liegt, weil die Temperatur von gespeichertem Brauchwasser geringer als die Temperatur von gespeichertem Heizwasser gehalten werden kann. Dem Bestreben nach möglichst kompakter Bauweise wird entsprochen, wenn auch der Warmwasserspeicher in Plattenbauweise ausgeführt ist. Dadurch ist auch eine besonders enge thermische Anbindung des Warmwasserspeichers an den Sekundärwärmetauscher möglich.The cooling losses of the hot water tank can be reduced if this in the course of Domestic water pipe is because the temperature of stored domestic water less than the temperature of stored heating water can be kept. The aspiration according to the most compact design possible, is met if the hot water tank is also made of panels is. This is also a particularly tight thermal Connection of the hot water tank to the Secondary heat exchanger possible.

Der Warmwasserspeicher kann platzsparend an den Sekundärwärmetauscher angesetzt sein. Bei einer bevorzugten Ausführung ist der Warmwasserspeicher den als Grundkörper der Baueinheit ausgebildeten Sekundärwärmetauscher umschließend ausgebildet. Dadurch ergeben sich große Kontaktflächen zwischen den beiden Baugruppen und der weitere Vorteil, daß die Abwärme des Sekundärwärmetauschers an die Umgebungsluft, bedingt durch das stehende Speichervolumen, geringer ist als bei einem einseitigen Anbau des Warmwasserspeichers an den Plattenstapel des Sekundärwärmetauschers. The hot water tank can be used to save space Secondary heat exchanger must be attached. In a preferred one The hot water tank is designed as a basic body the unit trained secondary heat exchanger comprehensively trained. This results in great ones Contact areas between the two modules and the further advantage that the waste heat from the secondary heat exchanger to the ambient air due to the standing Storage volume, is less than a one-sided Attachment of the hot water tank to the plate stack of the Secondary heat exchanger.

Ein besonders enger Kontakt zwischen Warmwasserspeicher und Sekundärwärmetauscher ergibt sich, wenn das Speichervolumen des Warmwasserspeichers in den Sekundärwärmetauscher integriert ist.A particularly close contact between the hot water tank and Secondary heat exchanger results when the storage volume of the hot water tank in the secondary heat exchanger is integrated.

Bei allen Kombinationsvarianten mit einem Heizwasserspeicher ist es vorteilhaft, wenn die Schnittstelle zwischen dem Heizwasserspeicher und dem Sekundärwärmetauscher mit einem Anschluß zum unmittelbaren, den Speicher umgehenden Zuführen des Heizwassers in den Sekundärwärmetauscher versehen ist.In all combination variants with a heating water tank it is advantageous if the interface between the Heating water tank and the secondary heat exchanger with one Connection for immediate feeding that bypasses the storage of the heating water is provided in the secondary heat exchanger.

Ein "Durchschießen" des Brauch- bzw. Heizwassers durch den Warmwasserspeicher wird vermieden, wenn der Warmwasserspeicher in einzelne, hintereinandergeschaltete Bereiche unterteilt ist, die vom Wasser nacheinander durchströmt werden.A "shooting" of the service or heating water through the Hot water storage tank is avoided if the Hot water storage tank in individual, connected in series Areas are divided by the water one by one be flowed through.

Zeichnungdrawing

Sechs Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung naher erläutert. Es zeigen Figur 1 eine vereinfachte Darstellung des allen Ausführungsbeispielen gemeinsamen Grundaufbaus, die Figuren 2 bis 4 je einen Querschnitt durch das erste, zweite und dritte Ausführungsbeispiel, Figur 5 vergrößert eine Einzelheit aus Figur 4, Figur 6 die Unteransicht eines vierten Ausführungsbeispiels und die Figuren 7 und 8 je einen Querschnitt durch das fünfte und sechste Ausführungsbeispiel.Six embodiments of the invention are in the Drawing shown and in the description below explained in more detail. 1 shows a simplified Representation of the common to all embodiments Basic structure, Figures 2 to 4 each have a cross section the first, second and third embodiment, Figure 5 enlarged a detail from Figure 4, Figure 6 the Bottom view of a fourth embodiment and the Figures 7 and 8 each have a cross section through the fifth and sixth embodiment.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Alle Ausführungsbeispiele haben einen von einer Wärmequelle 10 beheizten Primärwärmetauscher 11 in einem Heizwassernetz 12, das über eine Umwälzpumpe 13 und eine aus einem Sekundärwärmetauscher und einem Warmwasserspeicher bestehende Baueinheit 14 führt, die Wärme aus dem Heizwasser auf das Wasser in einer Brauchwasserleitung 15 überträgt. Der Warmwasserspeicher steht in engem thermischen Kontakt mit dem in Plattenbauweise ausgeführten Sekundärwärmetauscher und kann sowohl für die Speicherung von Brauchwasser, als auch von Heizwasser, oder von beiden vorgesehen sein.All of the embodiments have one from a heat source 10 heated primary heat exchanger 11 in a heating water network 12, the one via a circulation pump 13 and one Secondary heat exchanger and a hot water tank existing unit 14 leads, the heat from the heating water transfers to the water in a service water pipe 15. The hot water tank is in close thermal contact with the plate construction Secondary heat exchanger and can be used both for storage of domestic water, as well as heating water, or both be provided.

Beim Ausführungsbeispiel nach Figur 2 ist ein Sekundärwärmetauscher 18 durch einen Stapel von Platten 19 gebildet, die an ihren aufgestellten Rändern 20 dicht miteinander verbunden sind und wechselnde Kanäle a für Heizwasser und Kanäle b für Brauchwasser begrenzen. Die Kanäle a und b sind unter sich jeweils parallel geschaltet über Durchgänge 21, 22 miteinander verbunden, die durch entsprechende Formgebung der Platten 19 gebildet und gegen die dazwischenliegenden, das jeweils andere Fluid führenden Kanäle abgedichtet sind. Am Sekundärwärmetauscher 18 ist ein Anschlußstutzen 23 für den einen Strang des Heizwassernetzes 12 befestigt, der in die Durchgänge 21 führt. Entfernt vom Anschlußstutzen 23 und in der Zeichnung nicht sichtbar, ist eine zweite Gruppe von die Kanäle a verbindenden Durchgängen und ein damit korrespondierender Anschlußstutzen für den anderen Strang des Heizwassernetzes 12 angeordnet.In the embodiment of Figure 2 is a Secondary heat exchanger 18 through a stack of plates 19th formed, the 20 tight at their erected edges are interconnected and changing channels a for Limit heating water and channels b for process water. The Channels a and b are connected in parallel connected via passages 21, 22 which through appropriate shape of the plates 19 formed and against the intermediate, the other fluid leading Channels are sealed. On the secondary heat exchanger 18 is a Connection piece 23 for one strand of the heating water network 12 attached, which leads into the passages 21. Removed from Connection piece 23 and not visible in the drawing is a second group of passages connecting the channels a and a corresponding connection piece for the another strand of the heating water network 12 is arranged.

Der ankommende Strang der Brauchwasserleitung 15 ist in einem Brauchwasserspeicher 25 geführt, der auf den Sekundärwärmetauscher 18 aufgesetzt ist und mit diesem eine Baueinheit bildet. Zum Anschließen der Brauchwasserleitung 15 sind ein Anschlußstutzen 26 am Sekundärwärmetauscher 18 und ein Rohr 27 vorgesehen, das durch die Durchgänge 22 in den Brauchwasserspeicher 25 geführt ist. Das Rohr 27 erstreckt sich darin bis zu einer Stelle 28, die entfernt von der Gruppe der Durchgänge 22 angeordnet ist, deren oberster unmittelbar in den Brauchwasserspeicher 25 mündet. Entfernt vom Anschlußstutzen 26 und in der Zeichnung nicht sichtbar ist eine zweite Gruppe von die Kanäle b verbindenden Durchgängen und ein damit korrespondierender Anschlußstutzen für den weitergehenden Strang der Brauchwasserleitung 15 angeordnet.The incoming strand of the domestic water pipe 15 is in a hot water tank 25 performed on the Secondary heat exchanger 18 is placed and with this one Unit forms. For connecting the hot water pipe 15 are a connecting piece 26 on the secondary heat exchanger 18th and a tube 27 provided through the passages 22 in the hot water tank 25 is guided. The tube 27 extends therein to a location 28 which removes is arranged by the group of passages 22 whose top immediately opens into the hot water tank 25. Removed from the connector 26 and not in the drawing a second group of channels b is visible connecting passages and a corresponding one Connection piece for the further strand of Service water line 15 arranged.

Der Brauchwasserspeicher 25 steht über eine große Fläche in engem thermischen Kontakt mit der Platte 19 des Sekundärwärmetauschers 18 die den oberen Heizwasserkanal a begrenzt. Die Strömung im Brauchwasserspeicher 25 wird an dieser Platte 19 zwangsläufig entlanggeführt und der Ausgang des Brauchwasserspeichers 25 mündet auf kürzestem Wege, d.h. unmittelbar in die Gruppe der Brauchwasserkanäle b ein. Das Speichervolumen wird durch die ohnehin vorhandene Wärmetauscherfunktion aufgeheizt, so daß ein zusätzlicher Wärmetauscher für den Brauchwasserspeicher entfällt.The hot water tank 25 is in a large area close thermal contact with the plate 19 of the Secondary heat exchanger 18 which the upper heating water channel a limited. The flow in the hot water tank 25 is on this plate 19 inevitably led along and the exit of the hot water tank 25 opens out in the shortest possible way, i.e. directly into the group of service water channels b. The Storage volume is due to the already existing Heat exchanger function heated up, so that an additional There is no heat exchanger for the domestic hot water tank.

Die Ausführung nach Figur 3 stimmt mit jener nach Figur 2 bis auf das Merkmal überein, daß der Brauchwasserspeicher 25 zwischen zwei Heizwasserkanälen a des Sekundärwärmetauschers angeordnet ist, so daß sich ein noch intensiverer thermischer Kontakt zwischen dem Heizwasser und dem Brauchwasser im Brauchwasserspeicher 25 ergibt. Bei beiden Ausführungsbeispielen könnte der Warmwasserspeicher auch heizwasserseitig angeordnet sein.3 corresponds to that according to FIG. 2 except for the feature that the hot water tank 25th between two heating water channels a of the secondary heat exchanger is arranged so that there is an even more intense thermal contact between the heating water and the Hot water in the hot water tank 25 results. By both The hot water tank could also be exemplary embodiments be arranged on the heating water side.

Bei einer alternativen Ausführung sitzt der Warmwasserspeicher noch tiefer im Plattenstapel des Sekundärwärmetauschers, so daß er sowohl vom Heizwasser als auch vom Brauchwasser im Sekundärwärmetauscher umspült ist.In an alternative version, the Hot water tank even deeper in the plate stack of the Secondary heat exchanger, so that it is both from the heating water process water is also washed around in the secondary heat exchanger.

Beim Ausführungsbeispiel nach den Figuren 4 und 5 bildet ein Sekundärwärmetauscher 30 einen Grundkörper, der von einem ebenfalls in Plattenbauweise ausgeführten Brauchwasserspeicher 31 umfaßt ist. Der Sekundärwärmetauscher 30 ist an der Unterseite mit Anschlußstutzen für das Heizungsnetz 12 verbunden, von denen der eine, 32, in der Zeichnungsebene liegt und der andere, in der Zeichnung nicht sichtbare, entfernt davon angeordnet ist. Der innere Aufbau des Sekundärwärmetauschers 30 stimmt mit jenem nach Figur 2 überein, so daß hierauf nicht eingegangen wird. Der Brauchwasserspeicher 31 ist mit einem Anschlußstutzen 33 für den ankommenden Strang der Brauchwasserleitung 15 verbunden, der in eine Ringkammer 34 mündet, über welche noch zwei weitere Ringkammern 35, 36 angeordnet sind.In the embodiment according to Figures 4 and 5 forms a Secondary heat exchanger 30 a base body by a also made in panel construction Domestic hot water tank 31 is included. Of the Secondary heat exchanger 30 is on the underside Connections for the heating network 12 connected, of which one, 32, lies in the plane of the drawing and the other, not visible in the drawing, arranged away from it is. The internal structure of the secondary heat exchanger 30 is correct corresponds to that of Figure 2, so that not is received. The hot water tank 31 is with a Connection piece 33 for the incoming strand of Process water line 15 connected to an annular chamber 34 opens out, through which two further annular chambers 35, 36 are arranged.

Die Ringkammern 34, 35, 36 sind durch Platten 37, 38, 39, 40 begrenzt, die einstückig mit den Platten des Sekundärwärmetauschers 30 verbunden sind. Dadurch ist ein hervorragender thermischer Kontakt zwischen den beiden Baugruppen gegeben. Die Ringkammer 34 ist mit der Ringkammer 35 über eine in der Zeichnung nicht sichtbare Öffnung in der Platte 38 verbunden, die dem Anschlußstutzen 33 etwa diagonal gegenüberliegt. Die Ringkammer 35 ist über eine Öffnung 41 in der Platte 39 mit der Ringkammer 36 verbunden, die etwa koaxial zum Anschlußstutzen 33 angeordnet ist.The annular chambers 34, 35, 36 are by plates 37, 38, 39, 40 limited, which is integral with the plates of the Secondary heat exchanger 30 are connected. This is a excellent thermal contact between the two Assemblies given. The annular chamber 34 is with the annular chamber 35 via an opening not visible in the drawing in the Plate 38 connected to the connecting piece 33 approximately diagonally opposite. The annular chamber 35 is a Opening 41 in the plate 39 connected to the annular chamber 36, which is arranged approximately coaxially to the connecting piece 33.

Die Ringkammer 40 ist über ein an der Platte 39 befestigtes und durch die anderen Platten 38, 37 hindurchgeführtes Rohr 42 mit einer Kammer 43 verbunden, die zwischen der unteren Platte 37 und einer daran befestigten Haube 44 gebildet ist. Die Haube 44 erstreckt sich in den Bereich des Sekundärwärmetauschers 30 und greift dort über eine in der Platte 37 angeordnete Öffnung 45 über welche das zufließende Brauchwasser in die Brauchwasserkanäle b gelangt. Durch die versetzte Anordnung der Durchgänge von einer Kammer des Brauchwasserspeichers 31 zur anderen ergibt sich eine Reihenschaltung der Kammern, wobei ein "Durchschießen" des Wassers durch den Speicher vermieden und das Brauchwasser in jeder Kammer den Plattenstapel des Sekundärwärmetauschers 30 beidseitig umströmt. An der Unterseite des Sekundärwärmetauschers 30 ist ein in der Zeichnung nicht sichtbarer Anschlußstutzen für den weiterführenden Strang der Brauchwasserleitung 15 entfernt von der Öffnung 45 angeordnet.The annular chamber 40 is attached to the plate 39 and pipe passed through the other plates 38, 37 42 connected to a chamber 43 which is between the lower Plate 37 and a hood 44 attached thereto is formed. The hood 44 extends in the area of Secondary heat exchanger 30 and engages there in the one Plate 37 arranged opening 45 through which the inflowing Service water enters the service water channels b. Through the staggered arrangement of the passages from a chamber of the Domestic water storage 31 results in another Series connection of the chambers, with a "shooting" of the Avoided water through the storage and the domestic water in each chamber the plate stack of the secondary heat exchanger 30 flows around on both sides. At the bottom of the Secondary heat exchanger 30 is not one in the drawing visible connecting piece for the continuing strand the domestic water pipe 15 away from the opening 45 arranged.

Wie aus der Zeichnung ersichtlich, bildet nur jede zweite Platte des Sekundärwärmetauschers 30 eine Trennwand zwischen den Ringkammern 34, 35, 36, die daher die doppelte Höhe wie die Kanäle im Sekundärwärmetauscher 30 haben. Die dazwischenliegenden Platten 46 (Figur 5) weisen einen in die entsprechende Ringkammer hineinragenden Rand 47 auf, der mit örtlich herausgestellten Zungen 48 versehen ist. Durch diese Anordnung wird die thermische Anbindung des Speichervolumens an den Sekundärwärmetauscher 30 weiter erhöht.As can be seen from the drawing, only every second forms Plate of the secondary heat exchanger 30 a partition between the annular chambers 34, 35, 36, which therefore double the height have the channels in the secondary heat exchanger 30. The intermediate plates 46 (Figure 5) have one in the corresponding annular chamber protruding edge 47 which with locally exposed tongues 48 is provided. Through this Arrangement is the thermal connection of the storage volume to the secondary heat exchanger 30 further increased.

Die in den Figuren 4 und 5 beschriebene Ausführung könnte durch Vertauschen der Anschlüsse auch so eingesetzt werden, daß Heizwasser gespeichert wird und das Brauchwasser nur die Kanäle des Sekundärwärmetauschers füllt. In diesem Fall kann es zweckmäßig sein, beispielsweise an der Haube 44 etwa koaxial zur Öffnung 45 einen zweiten Anschlußstutzen für die unmittelbare Zuführung von Heizwasser unter Umgehung des Speichers vorzusehen.The embodiment described in Figures 4 and 5 could can also be used by swapping the connections that heating water is stored and the domestic water only that Fills the channels of the secondary heat exchanger. In this case it may be appropriate, for example on the hood 44 coaxial to the opening 45 a second connection piece for the direct supply of heating water bypassing the To provide storage.

Die in Figur 6 dargestellte Alternativlösung zur Ausführung nach Figur 4 hat als Grundkörper einen Sekundärwärmetauscher 50, der von einem Heizwasserspeicher 51 umschlossen ist. An der Unterseite ist der Sekundärwärmetauscher 50 mit Anschlüssen 52, 53 für die Brauchwasserleitung 15 und einem Anschluß 54 für das Heizungsnetz 12 versehen. Der innere Aufbau des Sekundärwärmetauschers 50 und des Brauchwasserspeichers 31 entspricht der Ausführung nach Figur 4. Der Heizwasserspeicher 51 hat einen Anschluß 55 für den zweiten Strang des Heizungsnetzes 12, der in die untere Ringkammer 34 mündet. Diese ist über eine Öffnung 56 in der sie abdeckenden Platte mit der darüberliegenden Ringkammer 35 verbunden, von der eine etwa koaxial zum Anschluß 55 angeordnete Öffnung in die dritte Ringkammer 36 führt.The alternative solution shown in Figure 6 for execution 4 has a secondary heat exchanger as the base body 50, which is enclosed by a heating water tank 51. On the bottom is the secondary heat exchanger 50 with Connections 52, 53 for the hot water pipe 15 and one Provide connection 54 for the heating network 12. The inner one Structure of the secondary heat exchanger 50 and Domestic hot water tank 31 corresponds to the version Figure 4. The heating water tank 51 has a connection 55 for the second strand of the heating network 12, which in the lower Annulus 34 opens. This is via an opening 56 in the cover plate with the overlying ring chamber 35 connected, one of which is approximately coaxial with the terminal 55 arranged opening leads into the third annular chamber 36.

Neben dem Anschluß 55 ist ein dem Rohr 42 der Figur 4 entsprechender Kanal 57 vorgesehen, der aus der dritten Ringkammer 36 zur Unterseite des Heizwasserspeichers 51 führt. Dort ist der Kanal 57 durch eine Haube 58 mit einer Öffnung 59 in der untersten Platte des Sekundärwärmetauschers 50 verbunden, die den Eingang zu dessen Heizwasserkanälen bildet. Das besondere an der Ausführung nach Figur 6 ist, daß zwischen dem Anschlußstutzen 50 und der darunterliegenden, die Ringkammern 35 und 36 verbindenden Öffnung einerseits und der von der Ringkammer 34 in die Ringkammer 35 führenden Öffnung 56 andererseits eine Trennwand 60 vorgesehen ist, die alle Ringkammern durchsetzt und beispielsweise durch entsprechende Prägungen der Platten gebildet ist. Die Trennwand 60 erzwingt in jeder Ringkammer eine durch die strichlinierte Linie 61 angedeutete Ringströmung des Heizwassers, die in den Ringkammern 34 und 36 im Uhrzeigersinn und in der Ringkammer 35 entgegen dem Uhrzeigersinn verläuft. Dadurch ist ein besonders intensiver Wärmeaustausch zwischen dem Heizwasser und dem Brauchwasser erreicht.In addition to the connection 55 there is a pipe 42 in FIG. 4 corresponding channel 57 is provided, the third Annular chamber 36 to the underside of the heating water tank 51 leads. There is the channel 57 through a hood 58 with a Opening 59 in the bottom plate of the Secondary heat exchanger 50 connected to the input whose heating water channels forms. The special thing about the Execution according to Figure 6 is that between the Connection piece 50 and the underlying, the Annular chambers 35 and 36 connecting opening on the one hand and the leading from the annular chamber 34 into the annular chamber 35 Opening 56 on the other hand a partition 60 is provided, which penetrates all annular chambers and for example through appropriate embossing of the plates is formed. The Partition 60 forces one through in each annular chamber dashed line 61 indicated ring flow of the Heating water, which in the annular chambers 34 and 36 in Clockwise and in the annular chamber 35 against Runs clockwise. This makes it a particularly intense one Heat exchange between the heating water and the domestic water reached.

Beim Ausführungsbeispiel nach Figur 7 sind in das Innere eines Sekundärwärmetauschers 64 zwei Speicherräume 65 und 66 für Brauchwasser integriert, das an einem Anschlußstutzen 67 zugeführt ist, die Speicherräume 65, 66 nacheinander durchläuft und danach in die parallel geschalteten Brauchwasserkanäle b des Sekundärwärmetauschers gelangt. Aus diesem strömt das Brauchwasser durch einen in der Zeichnung nicht sichtbaren, hinter dem Anschlußstutzen 67 liegenden Anschlußstutzen in den weiterführenden Strang der Brauchwasserleitung 15 ab. Die Anschlüsse für das Heizwasser und die inneren Verbindungen der parallel geschalteten Heizwasserkanäle sind in der Zeichnung der Einfachheit halber weggelassen. Die Anordnung könnte auch so getroffen sein, daß die Speicherräume 65, 66 im Zuge des Heizwassernetzes liegen und daß wie bei Figur 4 einzelne Platten mit Zungen in die Speicherräume 65, 66 hineinragen.In the embodiment of Figure 7 are inside of a secondary heat exchanger 64 two storage spaces 65 and 66 integrated for process water, which at a connection piece 67 is supplied, the storage spaces 65, 66 in succession runs through and then in the parallel Service water channels b reaches the secondary heat exchanger. Out the process water flows through one in the drawing not visible, lying behind the connecting piece 67 Connection piece in the continuing strand of Service water line 15 from. The connections for the heating water and the internal connections of the parallel ones Heating water channels are in the drawing of simplicity omitted for the sake of it. The arrangement could also be so be that the storage spaces 65, 66 in the course of Heating water network and that as in Figure 4 individual Protruding plates with tongues into the storage spaces 65, 66.

Das Ausführungsbeispiel nach Figur 8 hat einen Sekundärwärmetauscher 70, auf den ein Warmwasserspeicher 71 aufgesetzt ist, der ebenfalls in Plattenbauweise ausgeführt ist und sowohl Heizwasserkanäle a als auch Brauchwasserkanäle b enthält. Die Brauchwasserkanäle b sind im Warmwasserspeicher 71 in Reihe und im Sekundärwärmetauscher 70 parallel geschaltet. Die Heizwasserkanäle a sind in beiden Baugruppen 70, 71 parallel geschaltet. Die Kanäle a, b im Warmwasserspeicher 71 sind intern mit den Kanälen a, b im Sekundärwärmetauscher 70 verbunden, so daß auch in diesem Fall besondere Mittel und Maßnahmen hierfür nicht benötigt werden.The embodiment of Figure 8 has one Secondary heat exchanger 70, on which a hot water tank 71st is attached, which is also carried out in panel construction is and both heating water channels a and Service water ducts b contains. The hot water channels b are in the hot water tank 71 in series and in Secondary heat exchanger 70 connected in parallel. The Heating water channels a are parallel in both assemblies 70, 71 switched. The channels a, b in the hot water tank 71 are internally with channels a, b in secondary heat exchanger 70 connected, so that in this case also special means and Measures for this are not required.

Der Warmwasserspeicher 71 hat einen Anschlußstutzen 72 für den zulaufenden Strang der Brauchwasserleitung 15 und einen Anschlußstutzen 73 für das Heizungsnetz 12. Der Sekundärwärmetauscher 70 ist mit einem Anschlußstutzen 74 für das Heizungsnetz 12 und einen Anschluß 75 für den weiterführenden Strang der Brauchwasserleitung 15 versehen. Die Ausführung nach Figur 8 zeichnet sich durch eine besonders schnelle thermische Ankopplung des Speichers an den Sekundärwärmetauscher aus.The hot water tank 71 has a connection piece 72 for the incoming strand of the domestic water pipe 15 and one Connection piece 73 for the heating network 12. The Secondary heat exchanger 70 is with a connecting piece 74 for the heating network 12 and a connection 75 for the Continuing strand of the domestic water line 15 provided. The embodiment according to FIG. 8 is characterized by a particularly fast thermal coupling of the memory the secondary heat exchanger.

Claims (8)

Brauchwasserbereiter, mit einem von einer Wärmequelle beheizten Primärwärmetauscher in einem Heizwassernetz, das über einen in Plattenbauweise erstellten Sekundärwärmetauscher führt, welcher eine Brauchwasserleitung thermisch an das Heizwassernetz koppelt, und ferner mit einem Warmwasserspeicher, der bei einer Brauchwasseranforderung den durch das Aufheizen des Primärwärmetauschers entstehenden Zeitverlust ausgleicht, dadurch gekennzeichnet, daß der Warmwasserspeicher (35, 31, 51, 65, 66, 71) in engem thermischen Kontakt mit den Platten (19) des Sekundärwärmetauschers (18, 30, 50, 64, 70) steht und mit diesem eine Baueinheit bildet.Water heater, with one from a heat source heated primary heat exchanger in a heating water network, the over a panel construction Secondary heat exchanger leads, which one Hot water pipe thermally coupled to the heating water network, and also with a hot water tank that at a Hot water requirement by heating the Primary heat exchanger compensates for the loss of time, characterized in that the hot water tank (35, 31, 51, 65, 66, 71) in close thermal contact with the plates (19) of the secondary heat exchanger (18, 30, 50, 64, 70) and forms a structural unit with it. Brauchwasserbereiter nach Anspruch 1, dadurch gekennzeichnet, daß der Warmwasserspeicher (25, 31, 65, 66) im Zuge der Brauchwasserleitung liegt.Process water heater according to claim 1, characterized characterized in that the hot water tank (25, 31, 65, 66) lies in the course of the process water pipe. Brauchwasserbereiter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß auch der Warmwasserspeicher (31, 71) in Plattenbauweise ausgeführt ist.Process water heater according to claim 1 or 2, characterized characterized in that the hot water tank (31, 71) in Panel construction is carried out. Brauchwasserbereiter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Warmwasserspeicher (25, 71) an den Sekundärwärmetauscher (18, 70) angesetzt ist. Process water heater according to one of claims 1 to 3, characterized in that the hot water tank (25, 71) is attached to the secondary heat exchanger (18, 70). Brauchwasserbereiter nach Anspruch 4, dadurch gekennzeichnet, daß der Warmwasserspeicher (31, 51) den als Grundkörper der Baueinheit (14) ausgebildeten Sekundärwärmetauscher (30, 50) umschließt.Process water heater according to claim 4, characterized characterized in that the hot water tank (31, 51) as Base body of the unit (14) trained Encloses secondary heat exchanger (30, 50). Brauchwasserbereiter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Speichervolumen des Warmwasserspeichers (65, 66) in den Sekundärwärmetauscher (64) integriert ist.Process water heater according to one of claims 1 to 3, characterized in that the storage volume of the Hot water tank (65, 66) in the secondary heat exchanger (64) is integrated. Brauchwasserbereiter nach Anspruch 1, dadurch gekennzeichnet, daß der Warmwasserspeicher im Zuge der Heizwasserleitung liegt und die Schnittstelle zwischen Speicher und Wärmetauscher mit einem Anschluß für das Heizungsnetz verbunden ist.Process water heater according to claim 1, characterized characterized in that the hot water tank in the course of Heating water pipe is and the interface between Storage and heat exchanger with a connection for the Heating network is connected. Brauchwasserbereiter nach Anspruch 1, dadurch gekennzeichnet, daß der Warmwasserspeicher (31, 65, 66, 71) in einzelne hintereinandergeschaltete Bereiche unterteilt ist, die vom Wasser nacheinander durchströmt werden.Process water heater according to claim 1, characterized characterized in that the hot water tank (31, 65, 66, 71) divided into individual areas connected in series which the water flows through one after the other.
EP98110530A 1997-09-24 1998-06-09 Domestic hot water heater Expired - Lifetime EP0905453B2 (en)

Applications Claiming Priority (2)

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DE19742075A DE19742075A1 (en) 1997-09-24 1997-09-24 Water heater
DE19742075 1997-09-24

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EP0905453A3 EP0905453A3 (en) 2001-04-11
EP0905453B1 EP0905453B1 (en) 2003-06-18
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Cited By (5)

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WO2001048433A1 (en) * 1999-12-23 2001-07-05 Alfa Laval Corporate Ab Plate heat exchanger
WO2001057452A1 (en) * 2000-02-01 2001-08-09 Alfa Laval Corporate Ab. Heater and/or cooler
JP2003517558A (en) * 1999-12-15 2003-05-27 スウエプ インターナシヨナル アーベー Water heater with plate heat exchanger and hot water storage container
WO2006059208A1 (en) * 2004-12-01 2006-06-08 Cosmogas S.R.L. Heat exchanger for a combined boiler, and combined boiler using said heat exchanger
EP1703213A1 (en) * 2005-02-07 2006-09-20 Robert Bosch Gmbh Sanitary water heater

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EP1850082A1 (en) * 2006-04-24 2007-10-31 Sundsvall Energi AB Heat exchanger

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DE4236967A1 (en) * 1991-11-04 1993-05-06 Joh. Vaillant Gmbh U. Co, 5630 Remscheid, De Heating system with circulating pump - has hot-water storage tank in series with primary branch of heat-exchanger
GB2262593A (en) * 1991-12-17 1993-06-23 Inter Albion Ltd An apparatus for and method of providing hot sanitary water
EP0778450A1 (en) * 1995-12-08 1997-06-11 Chaffoteaux Et Maury Apparatus for producing domestic hot water

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DE2214711A1 (en) * 1972-03-25 1973-10-04 Egon Laforce HOT WATER HEATER
DE4027965A1 (en) * 1989-09-14 1991-03-28 Austria Email Eht Ag Water heating system in building - includes storage tank with external heat-exchanger and circulating pump
DE4236967A1 (en) * 1991-11-04 1993-05-06 Joh. Vaillant Gmbh U. Co, 5630 Remscheid, De Heating system with circulating pump - has hot-water storage tank in series with primary branch of heat-exchanger
GB2262593A (en) * 1991-12-17 1993-06-23 Inter Albion Ltd An apparatus for and method of providing hot sanitary water
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Publication number Priority date Publication date Assignee Title
JP2003517558A (en) * 1999-12-15 2003-05-27 スウエプ インターナシヨナル アーベー Water heater with plate heat exchanger and hot water storage container
EP1238231B2 (en) † 1999-12-15 2007-05-16 SWEP International AB Water heater comprising a plate heat exchanger and a storage container for heated water
WO2001048433A1 (en) * 1999-12-23 2001-07-05 Alfa Laval Corporate Ab Plate heat exchanger
WO2001057452A1 (en) * 2000-02-01 2001-08-09 Alfa Laval Corporate Ab. Heater and/or cooler
WO2006059208A1 (en) * 2004-12-01 2006-06-08 Cosmogas S.R.L. Heat exchanger for a combined boiler, and combined boiler using said heat exchanger
EP1703213A1 (en) * 2005-02-07 2006-09-20 Robert Bosch Gmbh Sanitary water heater

Also Published As

Publication number Publication date
DE19742075A1 (en) 1999-03-25
EP0905453B2 (en) 2006-03-01
EP0905453A3 (en) 2001-04-11
ATE243306T1 (en) 2003-07-15
EP0905453B1 (en) 2003-06-18
DE59808742D1 (en) 2003-07-24

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