EP0098450A2 - Fuel-fired heat source - Google Patents

Fuel-fired heat source Download PDF

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Publication number
EP0098450A2
EP0098450A2 EP83106034A EP83106034A EP0098450A2 EP 0098450 A2 EP0098450 A2 EP 0098450A2 EP 83106034 A EP83106034 A EP 83106034A EP 83106034 A EP83106034 A EP 83106034A EP 0098450 A2 EP0098450 A2 EP 0098450A2
Authority
EP
European Patent Office
Prior art keywords
heat source
water
hot water
fuel
line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP83106034A
Other languages
German (de)
French (fr)
Other versions
EP0098450A3 (en
EP0098450B1 (en
Inventor
Ulrich Ortlinghaus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vaillant BV
Original Assignee
Vaillant Austria GmbH
Cofrabel Nv
Joh Vaillant GmbH and Co
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
SCHONEWELLE BV
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Filing date
Publication date
Application filed by Vaillant Austria GmbH, Cofrabel Nv, Joh Vaillant GmbH and Co, Vaillant GmbH, Vaillant SARL, Vaillant Ltd, SCHONEWELLE BV filed Critical Vaillant Austria GmbH
Priority to AT83106034T priority Critical patent/ATE20494T1/en
Publication of EP0098450A2 publication Critical patent/EP0098450A2/en
Publication of EP0098450A3 publication Critical patent/EP0098450A3/en
Application granted granted Critical
Publication of EP0098450B1 publication Critical patent/EP0098450B1/en
Expired legal-status Critical Current

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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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/32—Control of valves of switching valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/335—Control of pumps, e.g. on-off control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/36—Control of heat-generating means in heaters of burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/215—Temperature of the water before heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/254—Room temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/258—Outdoor temperature

Definitions

  • the present invention relates to a fuel-heated heat source according to the preamble of the main claim.
  • Such heat sources together with the associated circuits are known as so-called circulation water heaters, which can switch a flow connection via a priority switch valve to a heating branch containing a radiator and to a domestic hot water tank, which is set up separately.
  • boilers which are switched as required either to a central heating system or to a store, which is usually located next to them, via a priority switch valve.
  • fuel-heated heat sources have become known in the form that they have the priority switch valve and a process water heater that works on the basis of the flow principle, which heats the process water as it flows through. There is no hot water storage here.
  • the power of the fuel-heated heat source must be dimensioned relatively large in order to be able to deliver the warm water required for bathing or showering in a correspondingly large throughput.
  • relatively small heat sources can come into play if one takes into account a correspondingly long charging time for the associated storage. If the heat source is dimensioned relatively large with regard to the storage capacity, there are high operational readiness losses, since the heat source works cyclically on the domestic hot water tank, the downtimes of the heat sources being lost times.
  • the present invention is based on the object, starting from the described prior art, to provide a heat source together with a domestic hot water preparation in which a large supply of domestic hot water is represented with a low power of the heat source, without neglecting the supply of a heating system.
  • a heat source 1 consists of a heat exchanger 2 and a burner 3, which is fed via a fuel supply line provided with a solenoid valve 4.
  • the heat exchanger 2 is supplied with circulating water 7 from a heating / process water circuit via a return line 7 provided with a circulation pump 6.
  • a flow pipe 8 connects, leading to a three-way valve 9 be by a servomotor 10 - is there, which is connected via Stel line 11 to a control unit 12th
  • the three-way valve 9 which can only move to two discrete positions or also continuously intermediate positions, has two outputs 13 and 14, the output 14 leading to a heating branch 16 having a plurality of radiators 15 connected in parallel and / or in series, the return line 17 is provided with two junction points 18 and 19 and leads to an intake port 20 of the pump 6.
  • the output 13 is connected to a hot water branch, which consists of a hot water supply line 21, a hot water flow heat exchanger 22 , a three-way valve 23 as well as a connecting line 24 and a hot water tank 25, to which a hot water return line 26 is connected, which leads via a backflow preventer 27 to the junction 18.
  • a further output leads via a bypass line 28, which is connected as a bypass to the hot water tank 25, to the junction point 19.
  • the three-way valve has two valve seats, which are formed by both the inlet of the line 28 and the input of the intermediate line 24 and which are more or less closable by a valve closure member 29 which is actuated by a temperature expansion sensor 30 which is exposed to the temperature of the heating water immediately after it has passed through a Line 31 has left the process water heater 22.
  • the hot water supply of the fuel-heated heat source just described consists of a tap pipe 32 connected to a feeding water network, which leads into the interior 33 of the hot water tank 25.
  • the connection between the intermediate line 24 and the return line 26 represents a heat exchanger tube coil 34 in the interior 33 of the water heater storage.
  • a temperature sensor 35 which is connected to the control element 12 via a measuring line 36, projects into the interior 33 of the domestic water heater memory.
  • Tap water leaves the interior 33 of the hot water storage tank via a connecting line 37 which leads to a pipe coil 38 which passes through the hot water heater.
  • the pipe coil 38 is connected at its downstream end to a tap 39, in which a water switch 40 is arranged, which is connected to the control member 12 via a measuring line 41.
  • the outflow end 42 of the tap line is controlled by a point tap valve 43.
  • a temperature sensor 45 is connected to the control device via a measuring line 44, which is connected in the flow line 8 between the heat exchanger 2 and the three-way valve 9 operating as a priority switching valve.
  • a control line 46 leads from the control element 12 to the electric motor which drives the pump 6.
  • Another line 47 leads to a solenoid 48 of the solenoid valve 4.
  • the control element 12 is still connected via sensors, not shown, the outside temperature ⁇ a, the room temperature, and also the temperature of the line 7 between the pump 6 and the heat exchanger 2. Size XS is also applied to the control element.
  • the water switch 40 registers a water flow and issues a corresponding command to the control element 12. This causes the priority switching valve 9 to be switched to the hot water branch.
  • cold hot water flows from the supplying water network via the line 32 into the interior 33 of the domestic hot water tank 25.
  • the domestic hot water tank begins to discharge. Since the hot water storage tank still has the maximum storage temperature in its flow, there is initially no temperature difference in the flow heater 22 between the hot water and the heating water. In the course of the gradual discharge of the hot water heater memory 25, there is a temperature difference here, so that heat is also released from the hot water heater branch to the hot water via the instantaneous water heater 22.
  • the temperature of the heating water in the pipe 31 thus drops downstream of the instantaneous water heater 22, and the expansion temperature sensor 30 begins to move.
  • the more the temperature of the process water leaving the store via the line 37 drops the more the inlet of the intermediate line 24 in the three-way valve 23 is closed and the more the inlet of the line 28 is opened, that is to say that ultimately the fuel-heated heat source is no longer connected to the series connection of instantaneous heater 22 and memory 25, but only after the completion of this state to instantaneous heater 22.
  • the hot water supply takes over the hot water supply in the first phase when hot water is requested, in a subsequent intermediate phase the storage tank supplies the basic heating for the hot water, while the instantaneous water heater functions as a reheater and during the final phase only the instantaneous water heater domestic water heating takes over.
  • the process water request is ended by closing the nozzle 43, after the end temperature level has been reached in the flow heater 22 - which happens very quickly because no heat is extracted from the flow heater - the store 25 is recharged.
  • the priority switch valve 9 Based on a comparison of the measurement results of the temperature sensor 35 in comparison with its associated setpoint and the room temperature sensor, the priority switch valve 9 can assume intermediate positions, so that the memory is partially charged, but on the other hand heat is also partially supplied to the heating branch.
  • the fuel-heated heat source be it a gas boiler or oil-fired instantaneous water heater, is operated with relatively long operating times, which are necessary in order to supply sufficient thermal energy to both the space heating and the storage. This means that this heat source can be operated at maximum load and with a very low efficiency at full load.

Abstract

1. A fuel-firing heat source (1) comprising a heating branch (16), which is adapted to be selectively connected by means of a priority change-over valve (9) and comprises radiators (15), also comprising a storage branch (21, 26) for dispensable water, characterized in that a flow heater (22) is connected in the flow line (24) leading to the storage tank (25) for dispensable water and in the flow path for the dispensable water succeeds the tank for the dispensable water and is connected to it by a connecting line (37).

Description

Die vorliegende Erfindung bezieht sich auf eine brennstoffbeheizte Wärmequelle gemäß dem Oberbegriff des Hauptanspruches.The present invention relates to a fuel-heated heat source according to the preamble of the main claim.

Solche Wärmequellen samt der zugehörigen Schaltungen sind einmal bekannt als sogenannte Umlaufwasserheizer, die einen Vorlaufanschluß Über ein Vorrangumschaltventil einmal auf einen einen Radiatoren enthaltenden Heizzweig und zum anderen auf einen Brauchwasserspeicher schalten können, der getrennt aufgestellt ist.Such heat sources together with the associated circuits are known as so-called circulation water heaters, which can switch a flow connection via a priority switch valve to a heating branch containing a radiator and to a domestic hot water tank, which is set up separately.

Weiterhin sind derartige brennstoffbeheizte Wärmequellen auch schon als Kessel bekanntgeworden, die entweder auf eine Zentralheizung oder auf einen in der Regel daneben stehenden Speicher über ein Vorrangumschaltventil bedarfsweise geschaltet werden.Furthermore, such fuel-heated heat sources have also become known as boilers, which are switched as required either to a central heating system or to a store, which is usually located next to them, via a priority switch valve.

Weiterhin sind brennstoffbeheizte Wärmequellen in der Form bekanntgeworden, daß sie in ihrem Inneren das Vorrangumschaltventil und einen nach dem Durchlaufprinzip arbeitenden Brauchwasser-Wärmetauscher aufweisen, der das Brauchwasser beim Durchfließen erwärmt. Hier findet keine Brauchwasserspeicherung statt.Furthermore, fuel-heated heat sources have become known in the form that they have the priority switch valve and a process water heater that works on the basis of the flow principle, which heats the process water as it flows through. There is no hot water storage here.

In diesem Fall muß die Leistung der brennstoffbeheizten Wärmequelle relativ groß bemessen werden, um das beim Baden oder Duschen benötigte warme wasser in entsprechend großem Durchsatz liefern zu können. Bei der erstgenannten Art der brennstoffbeheizten Wärmequellen können relativ kleine Wärmequellen zum Zuge kommen, wenn man eine entsprechend lange Ladezeit des zugehörigen Speichers in Kauf nimmt. Wird die Wärmequelle bezüglich der Speicherkapazität relativ groß bemessen, so ergeben sich hohe Betriebsbereitschaftsverluste, da die Wärmequelle taktend auf den Brauchwasserspeicher arbeitet, wobei die Stillstandszeiten der Wärmequellen Verlustzeiten sind.In this case, the power of the fuel-heated heat source must be dimensioned relatively large in order to be able to deliver the warm water required for bathing or showering in a correspondingly large throughput. In the first-mentioned type of fuel-heated heat sources, relatively small heat sources can come into play if one takes into account a correspondingly long charging time for the associated storage. If the heat source is dimensioned relatively large with regard to the storage capacity, there are high operational readiness losses, since the heat source works cyclically on the domestic hot water tank, the downtimes of the heat sources being lost times.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ausgehend von dem geschilderten Stand der Technik, eine Wärmequelle zusammen mit einer Brauchwasserbereitung zu schaffen, bei der bei kleiner Leistung der Wärmequelle ein großes Brauchwasserangebot dargestellt wird, und zwar ohne Vernachlässigung der Belieferung einer Heizungsanlage.The present invention is based on the object, starting from the described prior art, to provide a heat source together with a domestic hot water preparation in which a large supply of domestic hot water is represented with a low power of the heat source, without neglecting the supply of a heating system.

Die Lösung dieser Aufgabe liegt in den kennzeichnenden Merkmalen des Hauptanspruches.The solution to this problem lies in the characterizing features of the main claim.

Hieraus resultiert als technischer Fortschritt ein relativ hoher Wirkungsgrad der gesamten Anlage,da die Wärmequelle zur Ladung des Speichers lange Laufzeiten bei maximalem Wirkungsgrad fährt und da aufgrund der niedrigen Speichertemperatur die Bereitschaftsverluste des Speichers klein sind.As a technical advance, this results in a relatively high efficiency of the entire system, since the heat source for charging the storage tank runs for a long time at maximum efficiency and because the storage tank's readiness losses are small due to the low storage tank temperature.

Weitere Ausgestaltungen und besonders vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche beziehungsweise gehen aus der nachfolgenden Beschreibung hervor, die ein Ausführungsbeispiel der Erfindung anhand einer schematischen Schaltungsdarstellung näher erläutert.Further refinements and particularly advantageous developments of the invention are the subject of the subclaims or emerge from the following description, which explains an exemplary embodiment of the invention in more detail with reference to a schematic circuit diagram.

Eine Wärmequelle 1 besteht aus einem Wärmetauscher 2 und einem Brenner 3, der über eine mit einem Magnetventil 4 versehene Brennstoffzuleitung gespeist ist. Dem Wärmetauscher 2 wird über eine mit einer Umwälzpumpe 6 versehene Rücklaufleitung 7 Umlaufwasser aus einem Heiz-/Brauchwasserkreis zugeführt. An den Wärmetauscher 2 schließt sich eine Vorlaufleitung 8 an, die zu einem Drei-Wege-Ventil 9 führt, das von einem Stellmotor 10 be- herrscht ist, der über Stelleitung 11 mit einer Steuereinheit 12 verbunden ist.A heat source 1 consists of a heat exchanger 2 and a burner 3, which is fed via a fuel supply line provided with a solenoid valve 4. The heat exchanger 2 is supplied with circulating water 7 from a heating / process water circuit via a return line 7 provided with a circulation pump 6. To the heat exchanger 2, a flow pipe 8 connects, leading to a three-way valve 9 be by a servomotor 10 - is there, which is connected via Stel line 11 to a control unit 12th

Das Drei-Wege-Ventil 9, das nur zwei diskrete Stellungen oder auch kontinuierlich Zwischenstellungen anfahren kann, weist zwei Ausgänge 13 und 14 auf, wobei der Ausgang 14 zu einem eine Vielzahl parallel und/oder in Serie geschalteter Radiatoren 15 aufweisenden Heizzweig 16 führt, dessen Rückleitung 17 mit zwei Einmündungsstellen 18 und 19 versehen ist und zu einem Ansaugstutzen 20 der Pumpe 6 führt. Der Ausgang 13 ist an einen Brauchwasserzweig angeschlossen, der aus einer Brauchwasserbereiter-Vorlaufleitung 21, einem Brauchwasser-Durchflußwärmetauscher 22, einem Drei-Wege-Ventil 23 sowie einer Verbindungsleitung 24 und einem Brauchwasserspeicher 25 besteht, an den sich eine Brauchwasserbereiter-Rücklaufleitung 26 anschließt, die über einen Rückflußverhinderer 27 zur Einmündungsstelle 18 führt. Vom Drei-Wege-Ventil 23, das Endstellungen oder auch kontinuierliche Zwischenstellungen annehmen kann, führt ein weiterer Ausgang über eine Bypaßleitung 28, die als Bypaß zum Brauchwasserspeicher 25 geschaltet ist, zur Einmündungsstelle 19. Das Drei-Wege-Ventil weist zwei Ventilsitze auf, die sowohl von dem Eingang der Leitung 28 als auch vom Eingang der Zwischenleitung 24 gebildet sind und die von einem Ventilverschlußglied 29 mehr oder weniger verschließbar sind, das von einem Temperaturausdehnungsfühler 30 betätigt ist, der der Temperatur des Heizungswassers ausgesetzt ist,unmittelbar nachdem es über eine Leitung 31 den Brauchwasser-Durchlauferhitzer 22 verlassen hat.The three-way valve 9, which can only move to two discrete positions or also continuously intermediate positions, has two outputs 13 and 14, the output 14 leading to a heating branch 16 having a plurality of radiators 15 connected in parallel and / or in series, the return line 17 is provided with two junction points 18 and 19 and leads to an intake port 20 of the pump 6. The output 13 is connected to a hot water branch, which consists of a hot water supply line 21, a hot water flow heat exchanger 22 , a three-way valve 23 as well as a connecting line 24 and a hot water tank 25, to which a hot water return line 26 is connected, which leads via a backflow preventer 27 to the junction 18. From the three-way valve 23, which can assume end positions or continuous intermediate positions, a further output leads via a bypass line 28, which is connected as a bypass to the hot water tank 25, to the junction point 19. The three-way valve has two valve seats, which are formed by both the inlet of the line 28 and the input of the intermediate line 24 and which are more or less closable by a valve closure member 29 which is actuated by a temperature expansion sensor 30 which is exposed to the temperature of the heating water immediately after it has passed through a Line 31 has left the process water heater 22.

Die Brauchwasserführung der eben beschriebenen brennstoffbeheizten Wärmequelle besteht aus einem mit einem speisenden Wassernetz verbundenen Zapfleitungsrohr 32, das in den Innenraum 33 des Brauchwasserbereiter-Speichers 25 führt. Die Verbindung zwischen der Zwischenleitung 24 und der Rücklaufleitung 26 stellt im Innenraum 33 des Brauchwasserbereiter-Speichers eine Wärmetauscher-Rohrschlange 34 dar.The hot water supply of the fuel-heated heat source just described consists of a tap pipe 32 connected to a feeding water network, which leads into the interior 33 of the hot water tank 25. The connection between the intermediate line 24 and the return line 26 represents a heat exchanger tube coil 34 in the interior 33 of the water heater storage.

In den Innenraum 33 des Brauchwasserbereiter-Speichers ragt ein Temperaturfühler 35, der über eine Meßleitung 36 mit dem Steuerglied 12 verbunden ist. Zapfwasser verläßt den Innenraum 33 des Brauchwasserbereiter-Speichers über eine Verbindungsleitung 37, die zu einer Rohrschlange 38 führt, die den Brauchwasser-Durchlauferhitzer durchsetzt. Die Rohrschlange 38 ist an ihrem abströmseitigen Ende an eine Zapfleitung 39 angeschlossen, in der ein Wasserschalter 40 angeordnet ist, der über eine Meßleitung 41 mit dem Steuerglied 12 verbunden ist. Das ausflußseitige Ende 42 der Zapfleitung ist von einem Stellenzapfventil 43 beherrscht.A temperature sensor 35, which is connected to the control element 12 via a measuring line 36, projects into the interior 33 of the domestic water heater memory. Tap water leaves the interior 33 of the hot water storage tank via a connecting line 37 which leads to a pipe coil 38 which passes through the hot water heater. The pipe coil 38 is connected at its downstream end to a tap 39, in which a water switch 40 is arranged, which is connected to the control member 12 via a measuring line 41. The outflow end 42 of the tap line is controlled by a point tap valve 43.

An die Steuereinrichtung ist über eine Meßleitung 44 ein Temperaturfühler 45 angeschlossen, der in der Vorlaufleitung 8 zwischen Wärmetauscher 2 und dem als Vorrangumschaltventil arbeitenden Drei-Wege-Ventil 9 angeschlossen ist. Von dem Steuerglied 12 führt eine Stelleitung 46 zu dem Elektromotor, der die Pumpe 6 antreibt. Eine weitere Stelleitung 47 führt zu einer Magnetspule 48 des Magnetventiles 4.A temperature sensor 45 is connected to the control device via a measuring line 44, which is connected in the flow line 8 between the heat exchanger 2 and the three-way valve 9 operating as a priority switching valve. A control line 46 leads from the control element 12 to the electric motor which drives the pump 6. Another line 47 leads to a solenoid 48 of the solenoid valve 4.

Dem Steuerglied 12 sind noch über nicht dargestellte Fühler die Außentemperatur ϑ a, die Raumtemperatur, ebenso die Temperatur der Leitung 7 zwischen der Pumpe 6 und dem Wärmetauscher 2, aufgeschaltet. Weiterhin ist dem Steuerglied noch die Größe XS aufgeschaltet.The control element 12 is still connected via sensors, not shown, the outside temperature ϑ a, the room temperature, and also the temperature of the line 7 between the pump 6 and the heat exchanger 2. Size XS is also applied to the control element.

Die Funktion der eben beschriebenen brennstoffbeheizten Wärmequelle ist wie folgt:

  • Es wird davon ausgegangen, daß die ganze Anlage in einem aufgeheizten stationären Zustand ist und daß zur Zeit keine Brauchwasseranforderung besteht. Weiterhin wird vorausgesetzt, daß der Temperatufühler 35 im Inneren des Brauchwasserbereiter-Speichers 33 noch eine Regelabweichung mißt, daß also der Speicher 33 noch nicht voll geladen ist. Weiterhin fordert die Zentralheizung Wärme an, der entsprechende Raumtemperaturfühler r meldet ein entsprechendes Signal auf das Steuerglied 12. Somit geht die Wärmequelle in Betrieb, da das Steuerglied 12 entsprechende Stellbefehle über die Stelleitung 47 auf das Gasmagnetventil 48/4 gibt und da die Pumpe 6 über einen Stellbefehl auf der Leitung 46 läuft. Je nach dem Verhältnis des Wärmebedarfs des Heizzweiges wie auch des Brauchwasserbereiter-Speichers geht das Vorrangumschaltventil 9 in eine Zwischenstellung, so daß die brennstoffbeheizte Wärmequelle 1 ihr Vorlaufwasser teilweise in den Heizzweig 16 und teilweise in den Brauchwasserbereiter-Zweig 20 gibt. Im Brauchwasserbereiter-Zweig durchfließt das heiße Vorlaufwasser zunächst den Durchlauferhitzer 22. Da kein Zapfwasser entnommen wird, ist der Durchlauferhitzer auf seinem höchsten Temperaturstand angekommen. Diese Temperatur wird dem Ausdehnungstemperaturfühler 31 mitgeteilt, der das Ventilverschlußglied 29 so bewegt, daß die Bypaßleitung 28 an ihrem Anlaß im Drei-Wege-Ventil 23 verschlossen ist. Somit fließt das Wasser im Brauchwasserbereiter-Zweia weiter über die Verbindungsleitung 24 und die Rohrschlange 34 in die Rücklaufleitung 26 und von dort zur Einmündungsstelle 18. Hier vereinigen sich die Teilströme des Heiz- und Brauchwasserbereiter-Zweiges und gelangen über die Pumpe in die Rücklaufleitung 7. Bei dieser Betriebsweise steigt die Temperatur im Inneren 33 des Brauchwasserbereiter-Speichers 25 laufend an, bis die Regelabweichung zu null wird, das heißt,der Speicher maximal geladen ist. Ist das erreicht, resultiert über die Leitung 36 ein entsprechender Stellbefehl zum Steuerglied 12, das das Vorrangumschaltventil 9 über den Stellmotor 10 entsprechend verstellt. Nunmehr arbeitet die brennstoffbeheizte Wärmequelle nur noch auf dem Heizzweig 16.
The function of the fuel-heated heat source just described is as follows:
  • It is assumed that the entire system is in a heated, stationary state and that there is currently no hot water requirement. Furthermore, it is assumed that the temperature sensor 35 still measures a control deviation inside the domestic water heater memory 33, that is to say the memory 33 is not yet fully charged. Furthermore, the central heating system requests heat, the corresponding room temperature sensor r reports a corresponding signal to the control element 12. The heat source thus goes into operation since the control element 12 issues corresponding control commands via the control line 47 to the gas solenoid valve 48/4 and since the pump 6 an actuating command is running on line 46. Depending on the ratio of the heat requirement of the heating branch as well as the water heater memory, the priority switch valve 9 goes into an intermediate position, so that the fuel-heated heat source 1 gives its flow water partly in the heating branch 16 and partly in the water heater branch 20. In the process water heater branch, the hot flow water first flows through the instantaneous water heater 22. Since no water is drawn off, the instantaneous water heater has reached its highest temperature level. This temperature is communicated to the expansion temperature sensor 31, which moves the valve closure member 29 such that the bypass line 28 is closed in its three-way valve 23 when it is started. The water in the service water heater branch thus continues to flow via the connecting line 24 and the pipe coil 34 into the return line 26 and from there to the junction point 18. Here, the partial flows of the heating and service water heater branch come together and reach the return line 7 via the pump. In this mode of operation, the temperature inside 33 of the hot water storage tank 25 rises continuously until the control deviation becomes zero, that is to say the storage tank is loaded to the maximum. If this is achieved, a corresponding control command to the control element 12 results via the line 36, which adjusts the priority switch valve 9 accordingly via the servomotor 10. The fuel-heated heat source now only works on the heating branch 16.

Wird nunmehr Zapfwasser durch öffnen des Zapfventiles 43 angefordert, so registriert der Wasserschalter 40 einen Wasserdurchfluß und gibt einen entsprechenden Befehl an das Steuerglied 12. Das veranlaßt ein Umschalten des Vorrangumschaltventiles 9 auf den Brauchwasserbereiter-Zweig Gleichzeitig strömt kaltes Brauchwasser aus dem speisenden Wassernetz über die Leitung 32 in den Innenraum 33 des Brauchwasserbereiter-Speichers 25. Der Brauchwasserbereiter-Speicher beginnt sich zu entladen. Da der Brauchwasserbereiter-Speicher in seinem Vorlauf noch die maximale Speichertemperatur aufweist, entsteht im Durchflußerhitzer 22 zunächst keine Temperaturdifferenz zwischen Brauchwasser und Heizungswasser. Im Zuge der allmählichen Entladung des Brauchwasserbereiter-Speichers 25 gibt es hier eine Temperaturdifferenz, so daß auch über den Durchlauferhitzer 22 Wärme aus dem Brauchwasserbereiter-Zweig an das Brauchwasser abgegeben wird. Damit sinkt die Temperatur des Heizungswassers im Rohr 31 stromab des Durchlauferhitzers 22, der Ausdehnungstemperaturfühler 30 beginnt sich zu bewegen. Je stärker die Temperatur des den Speicher über die Leitung 37 verlassenden Brauchwassers sinkt, um so mehr wird der Eingang der Zwischenleitung 24 im Drei-Wege-Ventil 23 verschlossen und um so mehr wird der Eingang der Leitung 28 geöffnet, das heißt, daß letztendlich die brennstoffbeheizte Wärmequelle nicht mehr auf die Serienschaltung von Durchlauferhitzer 22 und Speicher 25 geschaltet ist, sondern nach Vollziehen dieses Zustandes nur noch auf den Durchlauferhitzer 22.If tap water is now requested by opening the tap valve 43, the water switch 40 registers a water flow and issues a corresponding command to the control element 12. This causes the priority switching valve 9 to be switched to the hot water branch. At the same time, cold hot water flows from the supplying water network via the line 32 into the interior 33 of the domestic hot water tank 25. The domestic hot water tank begins to discharge. Since the hot water storage tank still has the maximum storage temperature in its flow, there is initially no temperature difference in the flow heater 22 between the hot water and the heating water. In the course of the gradual discharge of the hot water heater memory 25, there is a temperature difference here, so that heat is also released from the hot water heater branch to the hot water via the instantaneous water heater 22. The temperature of the heating water in the pipe 31 thus drops downstream of the instantaneous water heater 22, and the expansion temperature sensor 30 begins to move. The more the temperature of the process water leaving the store via the line 37 drops, the more the inlet of the intermediate line 24 in the three-way valve 23 is closed and the more the inlet of the line 28 is opened, that is to say that ultimately the fuel-heated heat source is no longer connected to the series connection of instantaneous heater 22 and memory 25, but only after the completion of this state to instantaneous heater 22.

Das heißt, daß, ausgehend vom vollgeladenen Speicher, bei Brauchwasseranforderung in der ersten Phase der Speicher die Brauchwasserversorgung übernimmt, in einer anschließenden Zwischenphase liefert der Speicher die Grundheizung fur das Brauchwasser, während der Durchlauferhitzer als Nachheizer funktioniert und während in der Schlußphase nur noch der Durchlauferhitzer die Brauchwassererwärmung übernimmt.This means that, starting from the fully charged storage tank, the hot water supply takes over the hot water supply in the first phase when hot water is requested, in a subsequent intermediate phase the storage tank supplies the basic heating for the hot water, while the instantaneous water heater functions as a reheater and during the final phase only the instantaneous water heater domestic water heating takes over.

Wird die Brauchwasseranforderung durch Schließen des Zapfventiles 43 beendet, so wird nach Erreichen des Endtemperaturniveaus im Durchlauferhitzer 22 - was recht schnell geschieht, da dem Durchlauferhitzer keine Wärme entzogen wird - der Speicher 25 wieder geladen. Aufgrund eines Vergleiches der Meßergebnisse des Temperaturfühlers 35 im Vergleich mit seinem zugehörigen Sollwert und des Raumtemperaturfühlers kann das Vorrangumschaltventil 9 Zwischenstellungen annehmen, so daß der Speicher teilweise geladen wird, andererseits aber auch dem Heizzweig teilweise wieder Wärme zugeführt wird.If the process water request is ended by closing the nozzle 43, after the end temperature level has been reached in the flow heater 22 - which happens very quickly because no heat is extracted from the flow heater - the store 25 is recharged. Based on a comparison of the measurement results of the temperature sensor 35 in comparison with its associated setpoint and the room temperature sensor, the priority switch valve 9 can assume intermediate positions, so that the memory is partially charged, but on the other hand heat is also partially supplied to the heating branch.

Aufgrund der eben beschriebenen Wirkungsweise wird ersichtlich, daß die brennstoffbeheizte Wärmequelle 1, sei es ein Gaskessel oder ölbeheizter Durchlauferhitzer,mit relativ langen Betriebszeiten betrieben wird, die notwendig sind, um sowohl der Raumheizung als auch dem Speicher ausreichend Wärmeenergie zuzufuhren. Damit kann diese Wärmequelle mit Maximal last und mit einem bei Vollastbetrieb sehr günstigen Wirkungsgrad betrieben werden.Due to the mode of operation just described, it can be seen that the fuel-heated heat source 1, be it a gas boiler or oil-fired instantaneous water heater, is operated with relatively long operating times, which are necessary in order to supply sufficient thermal energy to both the space heating and the storage. This means that this heat source can be operated at maximum load and with a very low efficiency at full load.

Claims (2)

1. Brennstoffbeheizte Wärmequelle mit einem über ein Vorrangumschaltventil wahlweise anschließbaren Heizzweig mit Heizkörpern und einem Brauchwasserspeicherzweig, dadurch gekennzeichnet, daß im Vorlauf (24) des Brauchwasserbereiter-Speichers (25) ein Brauchwasser-Durchlauferhitzer (22) angeordnet. ist, der brauchwasserseitig dem Speicher (25) über eine Verbindungsleitung (37) nachgeschaltet ist.1. Fuel-heated heat source with a heating branch with radiators and a domestic water storage branch optionally connectable via a priority switching valve, characterized in that a domestic hot water heater (22) is arranged in the flow (24) of the domestic hot water storage tank (25). which is connected downstream of the storage water (25) via a connecting line (37). 2. Brennstoffbeheizte Wärmequelle nach Anspruch eins, dadurch gekennzeichnet, daß zwischen dem Durchlauferhitzer (22) und dem Speicher (25) im Heizungsvorlauf (24) des Speichers ein thermisch gesteuertes Drei-Wege-Ventil (23) angeordnet ist, dessen einer Ausgang eine Bypaßleitung (28) zum Speicher (25) bildet.2. Fuel-heated heat source according to claim one, characterized in that a thermally controlled three-way valve (23) is arranged between the water heater (22) and the memory (25) in the heating flow (24) of the memory, one output of which is a bypass line (28) to the memory (25).
EP83106034A 1982-07-02 1983-06-21 Fuel-fired heat source Expired EP0098450B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83106034T ATE20494T1 (en) 1982-07-02 1983-06-21 FUEL HEATED HEAT SOURCE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8219354U 1982-07-02
DE8219354 1982-07-02

Publications (3)

Publication Number Publication Date
EP0098450A2 true EP0098450A2 (en) 1984-01-18
EP0098450A3 EP0098450A3 (en) 1984-08-01
EP0098450B1 EP0098450B1 (en) 1986-06-18

Family

ID=6741636

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83106034A Expired EP0098450B1 (en) 1982-07-02 1983-06-21 Fuel-fired heat source

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Country Link
EP (1) EP0098450B1 (en)
AT (1) ATE20494T1 (en)
DE (1) DE3364175D1 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2153499A (en) * 1984-01-27 1985-08-21 Worcester Engineering Company Improvements in water heating systems
FR2571126A1 (en) * 1984-09-28 1986-04-04 Automatis Servitudes Manut Water preheating device using heat recovery
FR2601160A1 (en) * 1986-01-03 1988-01-08 Vaillant Sarl Device for regulating rates of flow of domestic water at different temperatures
EP0405136A2 (en) * 1989-06-28 1991-01-02 DEUTSCHE VORTEX GmbH Installation for hot water preparation
FR2651870A1 (en) * 1989-09-08 1991-03-15 Vaillant Sarl METHOD AND DEVICE FOR SUPPLYING SANITARY WATER IN SMALL QUANTITIES AT A SUFFICIENTLY HIGH TEMPERATURE.
EP0421312A2 (en) * 1989-10-04 1991-04-10 Joh. Vaillant GmbH u. Co. Device for controlling the operation of the flow heater reservoir by tapping of domestic hot water.
FR2722560A1 (en) * 1994-07-18 1996-01-19 Famchon Michel Domestic gas boiler for central heating and water heating
NL1000210C2 (en) * 1995-04-24 1996-10-25 Apparatenfabriek Warmtebouw B Combi boiler with improved performance.
EP0778450A1 (en) * 1995-12-08 1997-06-11 Chaffoteaux Et Maury Apparatus for producing domestic hot water
GB2365953A (en) * 2000-07-07 2002-02-27 George Curtis Supplementary heat exchanger arrangement for providing domestic hot water
EP1475571A1 (en) * 2003-05-08 2004-11-10 Vertrieb und Grosshandel von Heizungs-, Sanitär- und Elektroerzeugnissen Apparatus and method for controlling, dependant for the load, the hydraulic flow of a continuous-flow heater
NL1037113C2 (en) * 2009-07-09 2011-01-12 Petrus Cornelis Jozef Emmen DEVICE AND METHOD FOR CENTRAL HEATING AND THE DELIVERY OF HOT WATER.
WO2018002875A1 (en) * 2016-07-01 2018-01-04 Eti S.N.C. Thermal energy distribution kit or system for the production of domestic hot water and hot water for heating purposes and plant employing said kit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE567487C (en) * 1930-04-16 1933-01-04 Hans Hass Dipl Ing Tubular water heater equipped with a hot water tank and surrounded and heated by a special branched down pipe of a hot water heating system
LU55362A1 (en) * 1967-02-09 1968-04-09
DE2947590A1 (en) * 1979-11-26 1981-05-27 Ludwig 6754 Otterberg Rauth Domestic hot water plant - has additional external heat exchanger with switch-over valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE567487C (en) * 1930-04-16 1933-01-04 Hans Hass Dipl Ing Tubular water heater equipped with a hot water tank and surrounded and heated by a special branched down pipe of a hot water heating system
LU55362A1 (en) * 1967-02-09 1968-04-09
DE2947590A1 (en) * 1979-11-26 1981-05-27 Ludwig 6754 Otterberg Rauth Domestic hot water plant - has additional external heat exchanger with switch-over valve

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2153499A (en) * 1984-01-27 1985-08-21 Worcester Engineering Company Improvements in water heating systems
FR2571126A1 (en) * 1984-09-28 1986-04-04 Automatis Servitudes Manut Water preheating device using heat recovery
FR2601160A1 (en) * 1986-01-03 1988-01-08 Vaillant Sarl Device for regulating rates of flow of domestic water at different temperatures
EP0405136B1 (en) * 1989-06-28 1993-11-18 DEUTSCHE VORTEX GmbH Installation for hot water preparation
EP0405136A2 (en) * 1989-06-28 1991-01-02 DEUTSCHE VORTEX GmbH Installation for hot water preparation
FR2651870A1 (en) * 1989-09-08 1991-03-15 Vaillant Sarl METHOD AND DEVICE FOR SUPPLYING SANITARY WATER IN SMALL QUANTITIES AT A SUFFICIENTLY HIGH TEMPERATURE.
BE1004547A7 (en) * 1989-09-08 1992-12-08 Vaillant Sa METHOD AND DEVICE FOR THE SUPPLY OF A SMALL AMOUNT OF WATER at sufficiently high temperature level.
EP0421312A3 (en) * 1989-10-04 1991-09-04 Joh. Vaillant Gmbh U. Co. Method of and device for controlling the continuous flow storage working by tapping of domestic hot water
EP0421312A2 (en) * 1989-10-04 1991-04-10 Joh. Vaillant GmbH u. Co. Device for controlling the operation of the flow heater reservoir by tapping of domestic hot water.
FR2722560A1 (en) * 1994-07-18 1996-01-19 Famchon Michel Domestic gas boiler for central heating and water heating
NL1000210C2 (en) * 1995-04-24 1996-10-25 Apparatenfabriek Warmtebouw B Combi boiler with improved performance.
EP0740113A1 (en) * 1995-04-24 1996-10-30 Apparatenfabriek Warmtebouw B.V. Combined heating boiler with improved performance
EP0778450A1 (en) * 1995-12-08 1997-06-11 Chaffoteaux Et Maury Apparatus for producing domestic hot water
FR2742214A1 (en) * 1995-12-08 1997-06-13 Chaffoteaux Et Maury APPARATUS FOR GENERATING DOMESTIC HOT WATER AND CENTRAL HEATING WATER
GB2365953A (en) * 2000-07-07 2002-02-27 George Curtis Supplementary heat exchanger arrangement for providing domestic hot water
GB2365953B (en) * 2000-07-07 2004-08-25 George Curtis Heating systems
EP1475571A1 (en) * 2003-05-08 2004-11-10 Vertrieb und Grosshandel von Heizungs-, Sanitär- und Elektroerzeugnissen Apparatus and method for controlling, dependant for the load, the hydraulic flow of a continuous-flow heater
NL1037113C2 (en) * 2009-07-09 2011-01-12 Petrus Cornelis Jozef Emmen DEVICE AND METHOD FOR CENTRAL HEATING AND THE DELIVERY OF HOT WATER.
WO2018002875A1 (en) * 2016-07-01 2018-01-04 Eti S.N.C. Thermal energy distribution kit or system for the production of domestic hot water and hot water for heating purposes and plant employing said kit

Also Published As

Publication number Publication date
ATE20494T1 (en) 1986-07-15
EP0098450A3 (en) 1984-08-01
EP0098450B1 (en) 1986-06-18
DE3364175D1 (en) 1986-07-24

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