EP0421312A2 - Device for controlling the operation of the flow heater reservoir by tapping of domestic hot water. - Google Patents

Device for controlling the operation of the flow heater reservoir by tapping of domestic hot water. Download PDF

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Publication number
EP0421312A2
EP0421312A2 EP19900118771 EP90118771A EP0421312A2 EP 0421312 A2 EP0421312 A2 EP 0421312A2 EP 19900118771 EP19900118771 EP 19900118771 EP 90118771 A EP90118771 A EP 90118771A EP 0421312 A2 EP0421312 A2 EP 0421312A2
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EP
European Patent Office
Prior art keywords
water
heat exchanger
cold water
flow
heating
Prior art date
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Granted
Application number
EP19900118771
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German (de)
French (fr)
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EP0421312B1 (en
EP0421312A3 (en
Inventor
Joachim Berg
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N.V. VAILLANT S.A.
Vaillant Austria GmbH
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
Original Assignee
Vaillant Austria GmbH
Nv Vaillant Sa
Joh Vaillant GmbH and Co
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
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Application filed by Vaillant Austria GmbH, Nv Vaillant Sa, Joh Vaillant GmbH and Co, Vaillant GmbH, Vaillant SARL, Vaillant Ltd filed Critical Vaillant Austria GmbH
Publication of EP0421312A2 publication Critical patent/EP0421312A2/en
Publication of EP0421312A3 publication Critical patent/EP0421312A3/en
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Publication of EP0421312B1 publication Critical patent/EP0421312B1/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
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F24D19/1069—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water regulation in function of the temperature of the domestic hot water

Definitions

  • the present invention relates to a method for controlling the continuous storage operation in the case of tap water on a wall heater, and to a device therefor, comprising a continuous store which can be heated by a heat source for a combination water heater with domestic water treatment and space heating, in particular for a gas wall heater, with a secondary Heat exchanger through which the hot water is heated by the heating water, with a tap fitting with water switch and with a three-way valve for switching from heating to hot water operation via a control unit.
  • the start-up mode which starts with the minimum draw-off quantity at the start of the tap and ends when the full heat exchanger capacity is reached
  • the continuous mode which follows the thermal start-up, and an unlimited water flow guaranteed
  • the reloading operation which keeps the storage content within the specified limits thermally ready to compensate for the lack of performance of the heat exchanger at the start of the tap.
  • These devices have a secondary heat exchanger for domestic water heating, in which the domestic water is heated by heating water.
  • the electrical three-way valve is actuated by a water switch and the heating water is directed through the secondary heat exchanger.
  • a sufficiently large storage space with hot water at a sufficiently high temperature must be available.
  • large storage tanks are not particularly advantageous in terms of both construction and heating technology.
  • the present invention is therefore based on the object of developing a method and a device by means of which brewing water is provided for wall heating devices which, with a minimum of storage space, sensors and actuators, ensures a hot water supply which is ensured by rapid availability and a high outlet temperature constancy and distinguishes an unlimited withdrawal quantity.
  • This problem is solved with a method for controlling the continuous operation with tap water a wall heater, preferably on a combination water heater with process water treatment and space heating, which has a secondary heat exchanger and at least one storage tank, by supplying the incoming cold water flow to the heat exchanger area with a continuously increasing share and to the storage area with a continuously decreasing share during the thermal start-up , the sum of the partial flows being dimensioned so that the continuous operation is carried out in a known manner over the heat exchanger area and that a circulating flow between the heat exchanger area and the storage area is initiated during the recharging operation due to the density differences of the water in the respective areas.
  • the constant switching of the partial flows during the thermal start-up is carried out only after a defined start-up delay. This delay depends on the respective device data, such as storage capacity, heating capacity and the like.
  • a device for performing the method in a combination water heater of the type mentioned is that the flow memory consists of two parts, a memory with the secondary heat exchanger and another memory, that the memory via a hot water connection line and a Cold water connecting line are connected in parallel, that a three-way reversing valve is arranged in the cold water connecting line, which is connected downstream of the water switch in the cold water line and that the three-way reversing valve is provided with a valve drive that is electrically and / or thermally controllable.
  • the closure part and / or the body of the reversing valve has recesses, which, when the reversing valve is at rest, the flow direction from the cold water pipe to the storage tank release, which, however, continuously reduce the flow flow to the accumulator while tapping and actuating the valve drive, and on the other hand increase the flow flow to the accumulator with the secondary heat exchanger to the same extent, so that the sum of the partial flows to the two accumulators remains constant.
  • the invention provides according to a further feature that the closure part and / or the body of the reversing valve has or have recesses which fully release the flow direction from the cold water line to the storage tank with the secondary heat exchanger, on the other hand, the position of the Reversing valves in reloading the cold water connection line between the two reservoirs released and possibly blocked the flow direction of the cold water line.
  • a timing element is connected upstream of the valve drive, as a result of which the reversing valve is reversed during the thermal start-up with a defined initial delay.
  • the drawing shows schematically an embodiment of a combination water heater.
  • the combination water heater has a primary heat exchanger 2 heated by a burner 1, which is connected to a return line 4 provided with a circulation pump 3 and a flow line 5, the latter having a flow temperature sensor 6 which is connected to a measuring line 7 , which leads to an input of a control unit 8.
  • a return line 4 there is also a three-way valve 9 which can be actuated by a motor drive 10.
  • the motor drive 10 of the three-way valve 9 draws its actuating energy from the control unit 8 via a line 11. of radiators, and the heat exchanger return line 13, which returns from a secondary heat exchanger 17 in the memory 14 to the water heater.
  • the flow line 5 is divided into a T-piece in the heating flow line 15 and the heat exchanger flow line 16, which leads to the heat exchanger 17 in the flow storage 14.
  • the burner 1 is supplied with gas via a gas line 27, via a gas valve 28, which is controlled by a magnetic drive 29, and via a gas control device.
  • the magnetic drive 29 is through a line 31, a burner blower 30 through a line 32 with the Control unit 8 connected. Furthermore, the burner 1 is still not shown provided devices, such as ignition device, flame detection device, etc. assigned.
  • the secondary heat exchanger 17 for example in the form of a smooth pipe coil made of copper pipes, is arranged in the store 14, which is designed as a service water tank with appropriate insulation.
  • Coaxial fittings 18 for flow guidance are fastened coaxially in the smooth pipe coil.
  • the connection for the cold water supply is provided in the lower area of the memory 14.
  • a further store 19 is arranged.
  • a temperature sensor 34 of this memory 19 is connected to the control unit 8 via a line 35.
  • the two reservoirs 14 and 19 are connected to one another in their upper region by a hot water connecting line 33 and in their lower region by a cold water connecting line 36 and are thus connected in parallel between the cold water line 25 and the hot water line 24.
  • the hot water line 24 is connected directly to the hot water connecting line 33, whereas the cold water line 25 is connected to the cold water connecting line 36 via a three-way reversing valve 37.
  • the reversing valve 37 can be actuated by a valve drive 38 controlled electrically and / or thermally via a line 39.
  • a water switch 21 with temperature selector and microswitch 23 is connected via a line 40 to the control unit 8, arranged.
  • wel cher is connected via a line 40 to the control unit 8, arranged.
  • tap operation ie when hot water is drawn from the service water line 24 via a tap fitting, cold water flows through the cold water line 25 via the water switch 21. Due to the pressure difference, the microswitch 23 of the water switch 21 triggers the hot water operation by signals via the line 40 to the control unit 8.
  • the dimensioning of the two stores 14 and 19 depends above all on the maximum possible draw-off quantity, on the start-up time on the heating side and on the characteristics of the three-way reversing valve 37.
  • the hot water priority mode is triggered via the microswitch 23 of the water switch 21.
  • the three-way valve 9 is reversed from the motor 10 to the charging circuit via the control unit 8.
  • the burner blower 30 is actuated via the control unit 8 and, after the flushing time has elapsed, the gas valve 28 and the ignition device are actuated and the burner 1 starts up.
  • the reversing valve 37 downstream of the water switch 21 is at the start of the tap in the flow direction on the memory 19, so that the full tap throughput initially flows through the memory 19 to the tap.
  • valve drive 38 controls the flow direction continuously and within a predetermined time to the memory 14 with the secondary heat exchanger 17.
  • the flow resistances within the cable routing are adjusted so that the sum of the partial flows remains the same.
  • the valve drive 38 of the reversing valve 37 can be implemented both electrically, for example by means of a motor or an electrically heated expansion body, and thermally, for example by means of a liquid sensor, expansion body or the like, or from a combination of both.
  • a storage space 22 which, like the space in the storage 19, serves to bridge the power deficit at the start of the tap. In addition, it performs the function of a damper in continuous operation, which reduces the temperature fluctuations of the hot water which are inevitable when the burner 1 is operated in cycles, to an acceptable level.
  • the store 19 is first reloaded.
  • the reloading operation is triggered and ended by the temperature controller 34 in the store 19.
  • the reversing valve 37 is in a central position, so that the stores 14 and 19 are connected via the cold water connecting line 36. Since the stores 14 and 19 are permanently connected in their upper region via the hot water connecting line 33, a circulation flow sets in due to the density differences of the respective water contents, which allows the hot water heated in the store 14 to flow into the additional store 19 and the cooler water of the Memory 19 feeds the memory 14 from below.
  • the valve 37 switches back to the initial rest position. The heater operates the heating again or goes into standby mode in summer.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Massaging Devices (AREA)
  • Selective Calling Equipment (AREA)
  • Centrifugal Separators (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

Method of and device for controlling the continuous flow storage working during tapping of domestic hot water on a wall heating device with domestic hot-water preparation and room heating, with a secondary heat exchanger (17), by means of which the domestic water is heated by the heating water, with a tapping fitting (20) with water switch (21) and with a three-way valve (9) for switching over from heating to domestic water operation via a control unit (8). The continuous flow accumulator consists of an accumulator (14) with the secondary heat exchanger (17) and an additional accumulator (19), these accumulators (14, 19) being connected parallel via a hot water connecting pipe (33) and via a cold water connecting pipe (36). Moreover, there is arranged in the cold water connecting pipe (36) a three-way reverse valve (37) which is connected downstream of the water switch (21) in the cold water pipe (25). The three-way reverse valve (37) is provided with a valve drive (38) which can be controlled electrically or thermally.

Description

Die vorliegende Erfindung bezieht sich auf ein Verfahren zum Steuern des Durchlaufspeicherbetriebes bei Brauchwasser­zapfund an einem Wandheizgerät sowie auf eine Vorrichtung hiefür, bestehend aus einem von einer Wärmequelle beheizba­ren Durchlaufspeicher für einen Kombi-Wasserheizer mit Brauchwasseraufbereitung und Raumbeizung, insbesondere für ein Gaswandheizgerät, mit einem Sekundär-Wärmetauscher, durch den das Brauchwasser vom Heizwasser erwärmt wird, mit einer Zapfarmatur mit Wasserschalter sowie mit einem Dreiwe­ge-Ventil für das Umschalten von Heiz- auf Brauchwasserbe­trieb über eine Regeleinheit.The present invention relates to a method for controlling the continuous storage operation in the case of tap water on a wall heater, and to a device therefor, comprising a continuous store which can be heated by a heat source for a combination water heater with domestic water treatment and space heating, in particular for a gas wall heater, with a secondary Heat exchanger through which the hot water is heated by the heating water, with a tap fitting with water switch and with a three-way valve for switching from heating to hot water operation via a control unit.

Bei derartigen Anlagen mit Durchlaufspeichern kann man drei Betriebsphasen unterscheiden:A distinction can be made between three operating phases in such systems with continuous storage:

Den Anlaufbetrieb, der bei Zapfbeginn mit der Mindestzapf­menge startet und mit Erreichen der vollen Wärmetauscherlei­stung endet, den Durchlaufbetrieb, der sich dem thermischen Anlauf anschließt und eine zeitlich unbegrenzte Wasserent­ nahme gewährleistet und den Nachladebetrieb, der den Spei­cherinhalt innerhalb vorgegebener Schranken thermisch in Bereitschaft hält, um bei Zapfbeginn die noch fehlende Lei­stung des Wärmetauschers auszugleichen.The start-up mode, which starts with the minimum draw-off quantity at the start of the tap and ends when the full heat exchanger capacity is reached, the continuous mode, which follows the thermal start-up, and an unlimited water flow guaranteed and the reloading operation, which keeps the storage content within the specified limits thermally ready to compensate for the lack of performance of the heat exchanger at the start of the tap.

Bei diesen Geräten ist für die Brauchwassererwärmung ein Sekundär-Wärmetauscher vorhanden, in dem das Brauchwasser durch Heizwasser erwärmt wird. Beim Zapfen von Brauchwasser wird durch einen Wasserschalter das elektrische Dreiwege-­Ventil betätigt und das Heizwasser über den Sekundärwärme­tauscher geleitet. Zur Überbrückung des Leistungsdefizites bei Zapfbeginn während das thermischen Anlaufs muß ein aus­reichend großer Speicherraum mit Brauchwasser von ausrei­chend hoher Temperatur zur Verfügung stehen. Große Speicher sind jedoch sowohl bau- als auch heizungstechnisch nicht be­sonders vorteilhaft.These devices have a secondary heat exchanger for domestic water heating, in which the domestic water is heated by heating water. When tap water is drawn, the electrical three-way valve is actuated by a water switch and the heating water is directed through the secondary heat exchanger. To bridge the performance deficit at the start of the tap during the thermal start-up, a sufficiently large storage space with hot water at a sufficiently high temperature must be available. However, large storage tanks are not particularly advantageous in terms of both construction and heating technology.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren sowie eine Vorrichtung zu entwickeln, durch welche sich eine Brauwasserbereitstellung für Wandheizgeräte ergibt, die mit einem Minimum an Speicherraum, Sensorik und Aktorik eine Warmwasserdarbietung gewährleistet, die sich durch eine schnelle Verfügbarkeit, eine hohe Auslauftempera­turkonstanz und eine unbegrenzte Entnahmemenge auszeichnet.The present invention is therefore based on the object of developing a method and a device by means of which brewing water is provided for wall heating devices which, with a minimum of storage space, sensors and actuators, ensures a hot water supply which is ensured by rapid availability and a high outlet temperature constancy and distinguishes an unlimited withdrawal quantity.

Die Lösung dieser Aufgabe gelingt bei einem Verfahren zum Steuern des Durchlaufbetriebes bei Brauchwasserzapfung an einem Wandheizgerät, vorzugsweise an einem Kombi-­Wasserheizgerät mit Brauchwasseraufbereitung und Raumhei­zung, welches einen Sekundär-Wärmtauscher und mindestens einen Speicher aufweist, dadurch, indem während des thermi­schen Anlaufs der zufließende Kaltwasserstrom mit konti­nuierlich zunehmenden Anteil dem Wärmetauscherbereich und mit kontinuierlich abnehmenden Anteil dem Speicherbereich zugeführt wird, wobei die Summe der Teilströme konstant be­messen wird, daß der Durchlaufbetrieb in bekannter Weise über den Wärmetauscherbereich durchgeführt wird und daß bei Nachladebetrieb eine Zirkulationsströmung zwischen Wärmetau­scherbereich und Speicherbereich aufgrund der Dichteunter­schiede dese Wassers der jeweiligen Bereiche eingeleitet wird.This problem is solved with a method for controlling the continuous operation with tap water a wall heater, preferably on a combination water heater with process water treatment and space heating, which has a secondary heat exchanger and at least one storage tank, by supplying the incoming cold water flow to the heat exchanger area with a continuously increasing share and to the storage area with a continuously decreasing share during the thermal start-up , the sum of the partial flows being dimensioned so that the continuous operation is carried out in a known manner over the heat exchanger area and that a circulating flow between the heat exchanger area and the storage area is initiated during the recharging operation due to the density differences of the water in the respective areas.

Durch diese Maßnahmen wird trotz relative kleiner Speicherbe­reiche von Zapfbeginn an eine im wesentlichen konstante Brauchwassertemperatur erzielt, welche auch über eine länge­re Zapfdauer problemlos aufrecht erhalten werden kann.By means of these measures, despite the relatively small storage areas, an essentially constant hot water temperature is achieved from the start of the tap, which can be maintained without problems even over a longer tap period.

Gegebenenfalls ist es gemäß einer weiteren Maßnahme der Er­findung noch zweckmäßig, daß das konstante Umschalten der Teilströme während des thermischen Anlaufs erst nach einer definierten Anfahrverzögerung vorgenommen wird. Diese Verzö­gerung hängt von den jeweiligen Gerätedaten, wie Speicherka­pazität, Heizvermögen und dgl. ab.According to a further measure of the invention, it may also be expedient that the constant switching of the partial flows during the thermal start-up is carried out only after a defined start-up delay. This delay depends on the respective device data, such as storage capacity, heating capacity and the like.

Eine Vorrichtung zur Durchführung des Verfahrens bei einem Kombi-Wasserheizer der eingangs genannten Gattung besteht darin, daß der Durchlaufspeicher aus zwei Teilen, einem Speicher mit dem Sekundär-Wärmetauscher und einem weiteren Speicher, besteht, daß die Speicher über eine Warmwasser-­Verbindungsleitung und über eine Kaltwasser-Verbindungs­leitung parallel geschaltet sind, daß in der Kaltwasser-­Verbindungsleitung ein Dreiwege-Umsteuerventil angeordnet ist, welches dem Wasserschalter in der Kaltwasserleitung nachgeschaltet ist und daß das Dreiwege-Umsteuerventil mit einem Ventilantrieb versehen ist, der elektrisch und/oder thermisch steuerbar ist.A device for performing the method in a combination water heater of the type mentioned is that the flow memory consists of two parts, a memory with the secondary heat exchanger and another memory, that the memory via a hot water connection line and a Cold water connecting line are connected in parallel, that a three-way reversing valve is arranged in the cold water connecting line, which is connected downstream of the water switch in the cold water line and that the three-way reversing valve is provided with a valve drive that is electrically and / or thermally controllable.

Durch die erfindungsgemäße Maßnahme kann eine wirksame Überbrückung der Anfangsverzögerung beim thermischen Anlauf erzielt werden. Bei einem Minimum an Speicherraum wird eine schnelle Verfügbarkeit und eine hohe Brauchwassertempera­turkonstanz erreicht.By means of the measure according to the invention, an effective bridging of the initial deceleration during thermal start-up can be achieved. With a minimum of storage space, quick availability and a high constant hot water temperature are achieved.

Bei einer möglichen Ausgestaltung der Erfindung, bei der der dem Durchlaufspeicher zufließende Kaltwasserstrom während des thermischen Anlaufs mit kontinuierlich zunehmendem An­teil für die Wärmetauscherseite und im gleichen Maße abneh­mendem Anteil für die Speicherseite aufgeteilt wird, weist der Verschlußteil und/oder der Körper des Umsteuerventiles Ausnehmungen auf, die bei Ruhestellung des Umsteuerventiles die Flußrichtung von der Kaltwasserleitung zum Speicher freigeben, die jedoch bei Zapfbetrieb unter Betätigung des Ventilantriebes einerseits kontinuierlich den Strömungs­durchfluß zum Speicher vermindern und anderseits in gleichem Maße den Strömungsdurchfluß zum Speicher mit dem Sekundär-­Wärmetauscher erhöhen, sodaß die Summe der Teilströme zu den beiden Speichern konstant bleibt.In a possible embodiment of the invention, in which the cold water flow flowing to the continuous storage is divided during the thermal start-up with a continuously increasing portion for the heat exchanger side and an equally decreasing portion for the storage side, the closure part and / or the body of the reversing valve has recesses, which, when the reversing valve is at rest, the flow direction from the cold water pipe to the storage tank release, which, however, continuously reduce the flow flow to the accumulator while tapping and actuating the valve drive, and on the other hand increase the flow flow to the accumulator with the secondary heat exchanger to the same extent, so that the sum of the partial flows to the two accumulators remains constant.

Für den Durchlaufbetrieb sieht gemäß einem weiteren Merkmal die Erfindung vor, daß der Verschlußteil und/oder der Körper des Umsteuerventiles Ausnehmungen aufweist bzw. aufweisen, die die Flußrichtung von der Kaltwasserleitung zum Speicher mit dem Sekundär-Wärmetauscher voll freigeben, hingegen ist bei der Stellung des Umsteuerventiles im Nachladebetrieb die Kaltwasser-Verbindungsleitung zwischen den beiden Speichern freigegeben und gegebenenfalls die Flußrichtung von der Kaltwasserleitung gesperrt.For continuous operation, the invention provides according to a further feature that the closure part and / or the body of the reversing valve has or have recesses which fully release the flow direction from the cold water line to the storage tank with the secondary heat exchanger, on the other hand, the position of the Reversing valves in reloading the cold water connection line between the two reservoirs released and possibly blocked the flow direction of the cold water line.

Um der Trägheit während der Anlaufphase besser gerecht zu werden, wird gemäß einer weiteren Ausgestaltung der Erfin­dung dem Ventilantrieb ein Zeitglied vorgeschaltet, wodurch die Umsteuerung des Umsteuerventiles beim thermischen Anlauf mit einer definierten Anfangsverzögerung erfolgt.In order to better meet the inertia during the start-up phase, according to a further embodiment of the invention, a timing element is connected upstream of the valve drive, as a result of which the reversing valve is reversed during the thermal start-up with a defined initial delay.

Weitere Einzelheiten, Merkmale und Vorteile der Erfindung werden anhand der nachfolgenden Beschreibung unter Bezugnah­me auf die Zeichnung näher erläutert. Die Zeichnung zeigt schematisch eine Ausführungsform eines Kombi-Wasserheizers.Further details, features and advantages of the invention are explained in more detail with reference to the following description with reference to the drawing. The drawing shows schematically an embodiment of a combination water heater.

Der Kombi-Wasserheizer weist einen von einem Brenner 1 be­heizten Primär-Wärmetauscher 2 auf, der an eine mit einer Umwälzpumpe 3 versehene Rücklaufleitung 4 und eine Vorlauf­leitung 5 angeschlossen ist, wobei letztere einen Vorlauf-­Temperaturfühler 6 aufweist, der an eine Meßleitung 7 ange­schlossen ist, die zu einem Eingang einer Regeleinheit 8 führt. In der Rücklaufleitung 4 ist weiters ein Dreiwege-­Ventil 9 angeordnet, welches über einen Motorantrieb 10 betätigbar ist. Der Motorantrieb 10 des Dreiwege-Ventiles 9 bezieht seine Stellenergie über eine Leitung 11 von der Re­geleinheit 8. Im Dreiwege-Ventil 9 münden die Heizwasser-­Rücklaufleitung 12, die von einem nicht dargestellten Hei­zungssystem, z.B. von Heizkörpern, kommt und die Wärmetau­scher-Rücklaufleitung 13, welche von einem Sekundär-Wärme­tauscher 17 im Speicher 14 zum Wasserheizer zurückführt. Die Vorlaufleitung 5 teilt sich in einem T-Stück in die Hei­zungsvorlaufleitung 15 und die Wärmetauscher-Vorlaufleitung 16, die in den Durchlaufspeicher 14 zum Wärmetauscher 17 führt, auf.The combination water heater has a primary heat exchanger 2 heated by a burner 1, which is connected to a return line 4 provided with a circulation pump 3 and a flow line 5, the latter having a flow temperature sensor 6 which is connected to a measuring line 7 , which leads to an input of a control unit 8. In the return line 4 there is also a three-way valve 9 which can be actuated by a motor drive 10. The motor drive 10 of the three-way valve 9 draws its actuating energy from the control unit 8 via a line 11. of radiators, and the heat exchanger return line 13, which returns from a secondary heat exchanger 17 in the memory 14 to the water heater. The flow line 5 is divided into a T-piece in the heating flow line 15 and the heat exchanger flow line 16, which leads to the heat exchanger 17 in the flow storage 14.

Der Brenner 1 wird über eine Gasleitung 27, über ein Gasven­til 28, das durch einen Magnet antrieb 29 gesteuert wird, sowie über eine Gasregeleinrichtung mit Gas versorgt.Der Magnet antrieb 29 ist durch eine Stelleitung 31, ein Bren­nerglebläse 30 durch eine Leitung 32 mit der Regeleinheit 8 verbunden. Weiters sind dem Brenner 1 noch, nicht näher dar­ gestellte Einrichtungen, wie Zündeinrichtung, Flammenmel­deeinrichtung usw., zugeordnet.The burner 1 is supplied with gas via a gas line 27, via a gas valve 28, which is controlled by a magnetic drive 29, and via a gas control device. The magnetic drive 29 is through a line 31, a burner blower 30 through a line 32 with the Control unit 8 connected. Furthermore, the burner 1 is still not shown provided devices, such as ignition device, flame detection device, etc. assigned.

Im Speicher 14, der als Brauchwasserspeicher mit entspre­chender Isolation ausgebildet ist, ist der Sekundär-Wärme­tauscher 17, beispielsweise in Form einer Glattrohrschlange aus Kupferrohren, angeordnet, Koaxial in der Glattrohr­schlange sind Einbauten 18 zur Strömungsführung befestigt. Der Anschluß für die Kaltwasserzuleitung ist im unteren Be­reich des Speichers 14 vorgesehen.The secondary heat exchanger 17, for example in the form of a smooth pipe coil made of copper pipes, is arranged in the store 14, which is designed as a service water tank with appropriate insulation. Coaxial fittings 18 for flow guidance are fastened coaxially in the smooth pipe coil. The connection for the cold water supply is provided in the lower area of the memory 14.

Neben dem Speicher 14 mit dem Sekundär-Wärmetauscher 17 ist ein weiterer Speicher 19 angeordnet. Ein Temperaturfühler 34 dieses Speichers 19 ist über eine Leitung 35 mit der Regel­einheit 8 verbunden. Die beiden Speicher 14 und 19 sind in ihrem oberen Bereich durch eine Warmwasser-Verbindungs­leitung 33 und in ihrem unteren Bereich durch eine Kaltwas­ser-Verbindungsleitung 36 miteinander verbunden und so zwi­schen der Kaltwasserleitung 25 und der Brauchwasserleitung 24 parallelgeschaltet. Die Brauchwasserleitung 24 ist direkt an die Warmwasser-Verbindungsleitung 33 angeschlossen, woge­gen die Kaltwasserleitung 25 über ein Dreiwege-Umsteuer­ventil 37 mit der Kaltwasser-Verbindungsleitung 36 verbunden ist. Das Umsteuerventil 37 ist durch einen elektrisch und/o­der thermisch über eine Leitung 39 gesteuerten Ventilantrieb 38 betätigbar. In der Kaltwasserleitung 25 ist ein Wasser­schalter 21 mit Temperaturwähler und Mikroschalter 23, wel­ cher über eine Leitung 40 mit der Regeleinheit 8 verbunden ist, angeordnet. Bei Zapfbetrieb, d.h. wenn über eine Zap­farmatur der Brauchwasserleitung 24 Warmwasser entnommen wird, strömt Kaltwasser durch die Kaltwasserleitung 25 über den Wasserschalter 21 nach. Durch den Druckunterschied löst der Mikroschalter 23 des Wasserschalters 21 durch Signale über die Leitung 40 an die Regeleinheit 8 den Brauchwasser­betrieb aus.In addition to the store 14 with the secondary heat exchanger 17, a further store 19 is arranged. A temperature sensor 34 of this memory 19 is connected to the control unit 8 via a line 35. The two reservoirs 14 and 19 are connected to one another in their upper region by a hot water connecting line 33 and in their lower region by a cold water connecting line 36 and are thus connected in parallel between the cold water line 25 and the hot water line 24. The hot water line 24 is connected directly to the hot water connecting line 33, whereas the cold water line 25 is connected to the cold water connecting line 36 via a three-way reversing valve 37. The reversing valve 37 can be actuated by a valve drive 38 controlled electrically and / or thermally via a line 39. In the cold water line 25 is a water switch 21 with temperature selector and microswitch 23, wel cher is connected via a line 40 to the control unit 8, arranged. During tap operation, ie when hot water is drawn from the service water line 24 via a tap fitting, cold water flows through the cold water line 25 via the water switch 21. Due to the pressure difference, the microswitch 23 of the water switch 21 triggers the hot water operation by signals via the line 40 to the control unit 8.

Die Dimensionierung der beiden Speicher 14 und 19 hängt vor allem von der maximal möglichen Zapfmenge, von der Anlauf­zeit auf der Beheizungsseite sowie von den Kennlinien des Dreiwege-Umsteuerventiles 37 ab.The dimensioning of the two stores 14 and 19 depends above all on the maximum possible draw-off quantity, on the start-up time on the heating side and on the characteristics of the three-way reversing valve 37.

Der Durchlaufspeicherbeitrieb mit den beiden parallelgeschal­teten Speichern 14 und 19 funktioniert wie folgt:The continuous-flow memory operation with the two memories 14 and 19 connected in parallel functions as follows:

Bei einem Zapfbetrieb durch öffnen des Zapfventiles 20 und überschreiten des Mindestzapfdurchsatzes wird über den Mi­kroschalter 23 des Wasserschalters 21 der Brauchwasservor­rangbetrieb ausgelöst. Das Dreiwege-Ventil 9 wird über die Regeleinheit 8 vom Motor 10 auf den Ladekreis umgesteuert. Gleichzeitig wird über die Regeleinheit 8 das Brennergebläse 30 und nach Ablauf der Spülzeit das Gasventil 28 sowie die Zündeinrichtung angesteuert und der Brenner 1 geht in Be­trieb. Das dem Wasserschalter 21 nachgeordnete Umsteuerven­til 37 steht bei Zapfbeginn in Flußrichtung auf den Speicher 19 , sodaß der volle Zapfdurchsatz zunächst über den Spei­cher 19 zur Zapfstelle abfließt. Mit einer definierten An­fangsverzögerung durch ein Zeitglied in der Regeleinheit 8 steuert der Ventilantrieb 38 die Flußrichtung kontinuierlich und innerhalb einer vorgegebenen Zeit auf den Speicher 14 mit dem Sekundär-Wärmetauscher 17 um. Dabei sind die Strö­mungswiderstände innerhalb der Leitungsführung so abge­stimmt, daß die Summe der Teilströme gleichbleibt. Der Ven­tilantrieb 38 des Umsteuerventiles 37 kann sowohl elek­trisch, z.B. mittels Motor oder elekrisch beheiztem Dehn­stoffkörper, als auch thermisch, beispielsweise durch Flüs­sigkeitsfühler, Dehnkörper oder dgl., oder aus einer Kombi­nation von beiden realisiert sein.During a tap operation by opening the tap valve 20 and exceeding the minimum tap throughput, the hot water priority mode is triggered via the microswitch 23 of the water switch 21. The three-way valve 9 is reversed from the motor 10 to the charging circuit via the control unit 8. At the same time, the burner blower 30 is actuated via the control unit 8 and, after the flushing time has elapsed, the gas valve 28 and the ignition device are actuated and the burner 1 starts up. The reversing valve 37 downstream of the water switch 21 is at the start of the tap in the flow direction on the memory 19, so that the full tap throughput initially flows through the memory 19 to the tap. With a defined initial delay by a timing element in the control unit 8, the valve drive 38 controls the flow direction continuously and within a predetermined time to the memory 14 with the secondary heat exchanger 17. The flow resistances within the cable routing are adjusted so that the sum of the partial flows remains the same. The valve drive 38 of the reversing valve 37 can be implemented both electrically, for example by means of a motor or an electrically heated expansion body, and thermally, for example by means of a liquid sensor, expansion body or the like, or from a combination of both.

Oberhalb des Wärmetauschers 17 im Speicher 14 ist noch ein Speicherraum 22 vorgesehen, der ebenso wie der Raum des Speichers 19 zur Überbrückung des Leistungsdefizits bei Zapfbeginn dient. Darüber hinaus nimmt er im Durchlaufbe­trieb die Funktion eines Dämpfers wahr, der die bei taktend betriebenem Brenner 1 unvermeidlichen Temperaturschwingungen des Warmwassers auf ein abzeptables Maß verringert.Above the heat exchanger 17 in the storage 14 there is also a storage space 22 which, like the space in the storage 19, serves to bridge the power deficit at the start of the tap. In addition, it performs the function of a damper in continuous operation, which reduces the temperature fluctuations of the hot water which are inevitable when the burner 1 is operated in cycles, to an acceptable level.

Nach Beendigung des Zapfbetriebes erfolgt zunächst ein Nach­laden des Speichers 19. Der Nachladebetrieb wird ausgelöst und beendet durch den Temperaturführler 34 im Speicher 19. Während des Nachladebetriebs befindet sich das Umsteuerven­til 37 in einer Mittelstellung, sodaß die Speicher 14 und 19 über die Kaltwasser-Verbindungsleitung 36 verbunden sind. Da die Speicher 14 und 19 in ihrem oberen Bereich über die Warmwasser-Verbindungsleitung 33 permanent in Verbindung stehen, setzt aufgrund der Dichteunterschiede der jeweiligen Wasserinhalte eine Zirkulationsströmung ein, die das im Speicher 14 erwärmte Brauchwasser in den Zusatzspeicher 19 abfließen läßt und das kühlere Wasser des Speichers 19 dem Speicher 14 von unten zuführt. Mit Beendigung des Nachlade­vorganges steuert das Ventil 37 wieder in die anfängliche Ruheposition um. Das Heizgerät bedient wieder die Heizung oder geht im Sommerbetrieb in Bereitschaftsstellung.After the dispensing operation has ended, the store 19 is first reloaded. The reloading operation is triggered and ended by the temperature controller 34 in the store 19. During the reloading operation, the reversing valve 37 is in a central position, so that the stores 14 and 19 are connected via the cold water connecting line 36. Since the stores 14 and 19 are permanently connected in their upper region via the hot water connecting line 33, a circulation flow sets in due to the density differences of the respective water contents, which allows the hot water heated in the store 14 to flow into the additional store 19 and the cooler water of the Memory 19 feeds the memory 14 from below. When the reloading process has ended, the valve 37 switches back to the initial rest position. The heater operates the heating again or goes into standby mode in summer.

Claims (7)

1. Verfahren zum Steuern des Durchlaufbetriebes bei Brauchwasserzapfung an einem Wandheizgerät, vorzugs­weise an einem Kombi-Wasserheizgerät mit Brauchwas­seraufbereitung und Raumheizung, welches einen Se­kundär-Wärmetauscher und mindestens einen Speicher aufweist, dadurch gekennzeichnet, daß während des thermischen Anlaufs der zufließende Kaltwasserstrom mit kontinuierlich zunehmenden Anteil dem Wärmetau­scherbereich und mit kontinuierlich abnehmenden An­teil dem Speicherbereich zugeführt wird, wobei die Summe der Teilströme konstant bemessen wird, daß der Durchlaufbetrieb in bekannter Weise über den Wärme­tauscherbereich durchgeführt wird und daß bei Nach­ladebetrieb eine Zirkulationsströmung zwischen Wär­metauscherbereich und Speicherbereich aufgrund der Dichteunterschiede des Wassers der jeweiligen Berei­che eingeleitet wird.1. A method for controlling the continuous operation for tap water on a wall heater, preferably on a combination water heater with hot water treatment and space heating, which has a secondary heat exchanger and at least one storage device, characterized in that during the thermal start-up, the inflowing cold water flow with a continuously increasing proportion the heat exchanger area and with a continuously decreasing proportion is fed to the storage area, the sum of the partial flows being dimensioned constantly, that the continuous operation is carried out in a known manner via the heat exchanger area and that during recharging operation a circulation flow between the heat exchanger area and storage area due to the density differences of the water of the respective areas is initiated. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das kontinuierliche Umschalten der Teilströme während des thermischen Anlaufs nach einer definier­ten Anfahrverzögerung, welche von den jeweiligen Gerätedaten, wie Speicherkapazität, Heizvermögen und dgl. abhängig ist, durchgeführt wird.2. The method according to claim 1, characterized in that the continuous switching of the partial flows during the thermal start after a defined start-up delay, which is dependent on the respective device data, such as storage capacity, heating capacity and the like. Is carried out. 3. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1 oder 2, mit einem von einer Wärmequelle beheizbaren Durchlaufspeicher für einen Kombi-­Wasserheizer mit Brauchwasseraufbereitung und Raum­heizung insbesondere für ein Gaswandheizgerät, mit einem Sekundär-Wärmetauscher, durch den das Brauch­wasser vom Heizwasser erwärmt wird, mit einer Zapf­armatur mit Wasserschalter sowie mit einem Dreiwe­ge-Ventil für das Umschalten von Heiz- auf Brauch­wasserbetrieb über eine Regeleinheit, dadurch ge­kennzeichnet, daß der Durchlaufspeicher aus zwei Teilen, einem Speicher (14) mit dem Sekundär-Wärme­tauscher (17) und einem Zusatzspeicher (19) besteht, daß die Speicher (14,19) über eine Warmwasser-Ver­bindungsleitung (33) und über eine Kaltwasser-Ver­bindungsleitung (36) parallel geschaltet sind, daß in der Kaltwasser-Verbindungsleitung (36) ein Drei­wege-Umsteuerventil (37) angeordnet ist, welches dem Wasserschalter (21) in der Kaltwasserleitung (25) nachgeschaltet ist und daß das Dreiwege-Umsteuer­ventil (37) mit einem Ventilantrieb (38) versehen ist, der elektrisch und/oder thermisch steuerbar ist.3. Apparatus for carrying out the method according to claim 1 or 2, with a heatable from a heat source continuous storage for a combination water heater with domestic water treatment and space heating, in particular for a gas wall heater, with a secondary heat exchanger through which the domestic water is heated by the heating water with a tap fitting with a water switch and with a three-way valve for switching from heating to process water operation via a control unit, characterized in that the continuous storage tank consists of two parts, a storage tank (14) with the secondary heat exchanger (17) and an additional storage tank (19 ) is that the memory (14,19) via a hot water connection line (33) and via a cold water connection line (36) are connected in parallel, that in the cold water connection line (36) a three-way reversing valve (37) is arranged , which the water switch (21) in the cold water pipe (25) is connected downstream and that the three-way reversing valve (37) is provided with a valve drive (38) which is electrically and / or thermally controllable. 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der Verschlußteil und/oder der Körper des Um­steuerventiles (37) Ausnehmungen aufweist bzw. auf­weisen, die bei Ruhestellung des Umsteuerventiles die Flußrichtung von der Kaltwasserleitung (25) zum Zusatzspeicher (19) freigeben.4. The device according to claim 3, characterized in that the closure part and / or the body of the reversing valve (37) has or have recesses which release the flow direction from the cold water line (25) to the additional reservoir (19) when the reversing valve is at rest. 5. Vorrichtung nach Anspruch 3 oder 4, dadurch gekenn­zeichnet, daß der Verschlußteil und/oder der Körper des Umsteuerventiles (37) Ausnehmungen aufweist bzw. aufweisen, die bei Zapfbetrieb unter Betätigung des Ventilantriebes (38) einerseits kontinuierlich den Strömungsdurchfluß zum Zusatzspeicher (19) vermin­dern und anderseits in gleichem Maße den Strömungs­durchfluß zum Speicher (14) mit dem Sekundär-Wärme­tauscher (17) erhöhen, sodaß die Summe der Teilströ­me zu den beiden Speichern (14,19) konstant bleibt.5. Apparatus according to claim 3 or 4, characterized in that the closure part and / or the body of the reversing valve (37) has or have recesses which, on the one hand, continuously tap the flow flow to the additional accumulator (19) during tap operation with actuation of the valve drive (38). reduce and, on the other hand, increase the flow rate to the store (14) with the secondary heat exchanger (17) to the same extent, so that the sum of the partial flows to the two stores (14, 19) remains constant. 6. Vorrichtung nach einem der Ansprüche 3 bis 5, da­durch gekennzeichnet, daß der Verschlußteil und/oder der Körper des Umsteuerventiles (37) bei Stellung im Durchlaufbetrieb Ausnehmungen aufweist bzw. aufwei­sen, die die Flußrichtung von der Kaltwasserleitung (25) zum Speicher (14) mit dem Sekundär-Wärmetau­scher (17) voll freigeben.6. Device according to one of claims 3 to 5, characterized in that the closure part and / or the body of the reversing valve (37) has or have recesses when in the continuous operation position, the flow direction from the cold water line (25) to the memory (14 ) fully release with the secondary heat exchanger (17). 7. Vorrichtung nach einem der Ansprüche 3 bis 6, da­durch gekennzeichnet, daß der Verschlußteil und/oder der Körper des Umsteuerventiles (37) bei Stellung im Nachladebetrieb Ausnehmungen aufweist bzw. aufwei­sen, die die Flußrichtung der Kaltwasser-Verbin­dungsleitung (36) zwischen den beiden Speichern (14,19) freigegeben und gegebenenfalls die Flußrich­tung von der Kaltwasserleitung (25) sperren.7. Device according to one of claims 3 to 6, characterized in that the closure part and / or the body of the reversing valve (37) has or have recesses in the position in the reloading operation, which the flow direction of the cold water connecting line (36) between the two Save (14, 19) released and, if necessary, block the flow direction from the cold water pipe (25).
EP90118771A 1989-10-04 1990-09-29 Device for controlling the operation of the flow heater reservoir by tapping of domestic hot water. Expired - Lifetime EP0421312B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2295/89A AT393316B (en) 1989-10-04 1989-10-04 METHOD FOR CONTROLLING THE CONTINUOUS OPERATION IN THE WATER TAP ON A WALL HEATER AND DEVICE FOR IMPLEMENTING THE METHOD
AT2295/89 1989-10-04

Publications (3)

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EP0421312A2 true EP0421312A2 (en) 1991-04-10
EP0421312A3 EP0421312A3 (en) 1991-09-04
EP0421312B1 EP0421312B1 (en) 1993-09-29

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Application Number Title Priority Date Filing Date
EP90118771A Expired - Lifetime EP0421312B1 (en) 1989-10-04 1990-09-29 Device for controlling the operation of the flow heater reservoir by tapping of domestic hot water.

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EP (1) EP0421312B1 (en)
AT (2) AT393316B (en)
DE (2) DE4031187A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105805941A (en) * 2016-05-23 2016-07-27 珠海格力电器股份有限公司 Wall-hanging stove
DE102018210071A1 (en) * 2018-06-21 2019-12-24 Robert Bosch Gmbh Heater and heating system with one heater
US11029039B2 (en) * 2016-11-25 2021-06-08 Noritz Corporation Heating and hot water supplying device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142547C2 (en) * 1991-12-21 1993-11-25 Bosch Gmbh Robert Heater for space heating and domestic hot water preparation
DE4308941C2 (en) * 1993-03-19 2000-08-31 Harald Wolf Arrangement for the provision of hot water for flow storage heaters heated with gas wall devices
DE19751515C2 (en) † 1997-11-21 1999-12-02 Grundfos A S Bjerringbro Unit for a compact heating system
CN104633943B (en) * 2014-12-30 2019-03-26 广东自助者管道科技有限公司 A kind of gas heater pipe switch box mounting structure

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DE1753298A1 (en) * 1967-02-09 1971-07-08 Fonderie Soc Gen De Household water heaters
DE2201628A1 (en) * 1972-01-14 1973-07-19 Ctc Gmbh TEMPERATURE-CONTROLLED HOT WATER HEATING SYSTEM
EP0098450A2 (en) * 1982-07-02 1984-01-18 Joh. Vaillant GmbH u. Co. Fuel-fired heat source
DE3714968A1 (en) * 1986-05-03 1987-11-05 Vaillant Joh Gmbh & Co Hot-water supply system

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1753298A1 (en) * 1967-02-09 1971-07-08 Fonderie Soc Gen De Household water heaters
DE2201628A1 (en) * 1972-01-14 1973-07-19 Ctc Gmbh TEMPERATURE-CONTROLLED HOT WATER HEATING SYSTEM
EP0098450A2 (en) * 1982-07-02 1984-01-18 Joh. Vaillant GmbH u. Co. Fuel-fired heat source
DE3714968A1 (en) * 1986-05-03 1987-11-05 Vaillant Joh Gmbh & Co Hot-water supply system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105805941A (en) * 2016-05-23 2016-07-27 珠海格力电器股份有限公司 Wall-hanging stove
US11029039B2 (en) * 2016-11-25 2021-06-08 Noritz Corporation Heating and hot water supplying device
DE102018210071A1 (en) * 2018-06-21 2019-12-24 Robert Bosch Gmbh Heater and heating system with one heater

Also Published As

Publication number Publication date
ATA229589A (en) 1991-02-15
AT393316B (en) 1991-09-25
ATE95294T1 (en) 1993-10-15
EP0421312B1 (en) 1993-09-29
DE59002916D1 (en) 1993-11-04
DE4031187A1 (en) 1991-04-18
EP0421312A3 (en) 1991-09-04

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