EP0120283B1 - Process for switching over a heat source - Google Patents

Process for switching over a heat source Download PDF

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Publication number
EP0120283B1
EP0120283B1 EP84101769A EP84101769A EP0120283B1 EP 0120283 B1 EP0120283 B1 EP 0120283B1 EP 84101769 A EP84101769 A EP 84101769A EP 84101769 A EP84101769 A EP 84101769A EP 0120283 B1 EP0120283 B1 EP 0120283B1
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EP
European Patent Office
Prior art keywords
heat source
line
water
hot water
time
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.)
Expired
Application number
EP84101769A
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German (de)
French (fr)
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EP0120283A3 (en
EP0120283A2 (en
Inventor
Jürgen Taag
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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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 AT84101769T priority Critical patent/ATE35178T1/en
Publication of EP0120283A2 publication Critical patent/EP0120283A2/en
Publication of EP0120283A3 publication Critical patent/EP0120283A3/en
Application granted granted Critical
Publication of EP0120283B1 publication Critical patent/EP0120283B1/en
Expired legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24DDOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00Details
    • F24D19/10Arrangement or mounting of control or safety devices
    • F24D19/1006Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1066Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water

Definitions

  • the present invention relates to a method for reversing a heat source according to the preamble of the claim.
  • FR-A-2 465 164 a generic method for so-called circulation water heaters has become known, which can be switched between two consumer branches by means of a priority switch valve, one of which is a plurality of radiators connected in parallel and / or in series, the others, however, has a domestic hot water tank.
  • the changeover valve is controlled here by a control device which responds when there is a need for reheating in the hot water tank and which reverses the changeover valve in such a way that the heat source is switched to the hot water tank.
  • the control deviation of the water temperature is formed in the storage tank and weighted in high or low heat requirements. The same is done with the heating requirement of the room heating, and by comparing the two heating requirements, the heat source is switched to either the heating or the storage. This requires extensive tax logic.
  • the present invention has for its object to develop a method for reversing a heat source from a heater to a domestic hot water tank to prevent the excessive drop in the room temperature when the domestic hot water tank must be charged, but there is no acute need for domestic water.
  • a fuel-heated heat source 1 essentially has a heat exchanger 2 heated by a gas or oil burner (not shown), which is connected to a return line 3 and to a supply line 4, in which a temperature sensor 5 is arranged and which is connected to a 3-way connection Switching valve 6 is connected, which is controlled by an actuator 8 via an actuating rod 7.
  • the servomotor 8 is controlled via a control line 9 by a regulating or control device 10, which is connected to the temperature sensor 5 via a measuring line 11.
  • the 3-way switch valve 6 has a first outlet port on the laufle to a Walker restructuringvor- i tung 12, in parallel to a plurality of and / or connected in series-connected heaters 13, one of which is shown. which is arranged in an interior 14 of a building 15.
  • a return line 16 leads from the radiators via a branching point 17 to the return line 3, into which a circulating pump 18 is switched on.
  • a second outlet connection of the 3-way switch valve 6 is connected to a hot water supply line 19 which leads to a hot water tank 20 which is connected to the branch point 17 via a hot water return line 21.
  • the domestic hot water heater 20 has in its interior a domestic water storage vessel 22 which is connected to a supplying cold water network via an inlet line 23 and to a plurality of tapping points via a tap line 25 provided with a tap valve 24, the temperature of the tap line 25 being sensed by a temperature sensor 26 is connected to the control and regulating device 10 via a measuring line 27.
  • a further temperature sensor 28 is arranged in the interior of the domestic water storage vessel 22 and is likewise connected to the regulating and control device 10 via a measuring line 29.
  • a room temperature sensor 30 belongs to the room 14 and is connected to the control and regulating device 10 via a further measuring line 31.
  • Setpoint adjusters 32, 33 and 34 are provided on the control and regulating device, on which setpoints for the flow temperature, for the room temperature and for the hot water temperature can be specified.
  • control and regulating device 10 In this respect, essential parts of the control and regulating device 10 can be seen from FIG. than that it suppresses the priming of process water.
  • the one in the tax and regulations direction 10 integrated flow and process water temperature controller is not described further.
  • part 40 of the open-loop and closed-loop control device it can be determined by comparing the signals present at the setpoint generator 33 and at the actual value generator 30 whether there is a room temperature reduction compared to the setpoint.
  • part 41 It can be determined on part 41, for example via the temperature sensor 26 and the measuring line 27 or via a tap water switch arranged in the course of the lines 23 or 25, whether there is a domestic water tap.
  • part 42 it can be determined whether a domestic water storage charge is necessary. If the actual temperature value communicated by the sensor 28 via the measuring line 29 to the control and regulating device 10 reaches a control deviation that is too great compared to the setpoint set at the setpoint adjuster 34, the part 42 responds.
  • the part 40 is connected via an output line 43 with the interposition of a negation element 46 to an OR gate 44, the second input of which is formed by a line 45 from the part 41.
  • the output of the OR element is connected via a line 47 to an input of an AND element 48, the second input of which is connected via a line 49 to the output of part 42.
  • the servomotor 8 is connected via a line 50, which can change over the priority changeover valve in the direction of heating operation or hot water operation.
  • FIG. Three shows in detail the part 40 of the control and regulating device 10 which leads to the detection of the lowering of the room temperature exceeding a control deviation.
  • the room temperature sensor 30 is connected with its line 31 to a comparator 55, the output of which is connected with a line 56 to a further comparator 57.
  • the room temperature setpoint generator 32 is connected via a line 58 to the other input of the comparator 55.
  • a setpoint generator 59 for the maximum setpoint temperature deviation is connected via a line 60 to the second input of the second comparator 57.
  • Line 43 forms the output of the second comparator.
  • FIG. 5 shows a circuit in which the hot water storage temperature sensor 28 is connected via its line 29 to a comparator 70 and the second is connected to a memory 72 via a line 71 parallel to line 29.
  • a timer 73 is connected via a line 74 once to the comparator and to the second in parallel to the memory 72.
  • a line bundle 75 leads from the memory 72 to the comparator, the output line 76 of which is connected to the non-inverted input of the OR element 44, that is to say to the line 45.
  • the circuit according to FIG. 5 then replaces part 41.
  • the heating and domestic water preparation system shown in FIG. 1 has the following function in connection with the control and regulating device 10 according to FIG.
  • the control and regulating device 10 controls the 3-way switch valve 6 in the position that the heat source 1 is connected to the radiator 13. If the heat supplied to the room 15 is sufficient to bring the control deviation of the room temperature to zero, then the heat source 1 is either operated in a pulse-pause mode or throttled in its operation during continuous operation, so that the room temperature fluctuates slightly around the set temperature.
  • control and regulating device 10 will switch the changeover valve 6 to the domestic hot water heater and interrupt the energy supply to the radiators 13.
  • the tap water sensor 26 responds and ensures that now the control and regulating device does not change the position of the switching valve 6 on the water heater. If the heat source 1 was connected to the radiators 13, priority switching to the domestic hot water heater takes place.
  • part 42 also supplies an output signal on line 49, but if the room temperature is still below the setpoint by the maximum permissible deviation, under-element 48 is not switched through.
  • a corresponding signal on line 50 causes the servomotor 8 to be adjusted with a view to connecting the heat source 1 to the heating circuit with the radiators 13. Only when the control deviation there falls below a certain value is the domestic water heater recharged.
  • the domestic hot water heater can be recharged at intervals or in one piece, depending on whether or not a certain permitted room temperature control deviation is permitted Domestic water heater switched.
  • the time is measured for which the heat source 1 was switched to the domestic hot water heater. If a certain adjustable period of time is exceeded, it can be assumed that the control deviation for the room temperature is so large that reheating of the heating system is now necessary if the tap water requirement no longer exists; the domestic hot water heater would have to be reheated in order to bring the storage tank contents up to the set temperature , but this is to be regarded as subordinate to the room heating supply, since there is currently no tap requirement. Otherwise, the function is analogous to the embodiment just described.

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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)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Defrosting Systems (AREA)
  • Push-Button Switches (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Electronic Switches (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

1. A method of shifting a heat source from a room-heating system to a heater for consumable water where a demand for consumable water takes precedence to room heating, characterized in that the time of a demand for consumable water, i. e., the tapping time, is measured and after a demand for water for consumption a reheating of the storage device for water for consumption is suppressed and the heat source is connected to the room-heating system when the reheating time, i. e., the time for which the heat source (1) has been connected to the storage device (20) for consumable water, has exceeded a predetermined interval of time in which no consumable water has been tapped.

Description

Die vorliegende Erfindung bezieht sich auf ein Verfahren zum Umsteuern einer Wärmequelle gemäß dem Oberbegriff des Patentanspruchs.The present invention relates to a method for reversing a heat source according to the preamble of the claim.

Aus der FR-A-2 465 164 ist ein gattungsgemä-Ben Verfahren für sogenannte Umlaufwasserheizer bekanntgeworden, die mittels eines Vorrang-Umschaltventils zwischen zwei Verbraucherzweige umgeschaltet werden können, von denen der eine eine Vielzahl von parallel und/oder in Serie geschalteten Heizkörpern, der andere hingegen einen Brauchwasserspeicher aufweist. Das Umschaltventil wird hier von einer Steuereinrichtung beherrscht, die anspricht, wenn im Brauchwasserspeicher ein Nachheizbedarf besteht, und die das Umschaltventil derart umsteuert, daß die Wärmequelle auf den Brauchwasserspeicher geschaltet ist. Im Speicher wird die Regelabweichung der Wassertemperatur gebildet und in hohen oder niedrigen Wärmebedarf gewichtet. Das gleiche wird mit dem Wärmebedarf der Raumheizung durchgeführt, und anhand des Vergleichs beider Wärmebedürfnisse wird die Wärmequelle entweder auf die Heizung oder den Speicher geschaltet. Hierzu ist eine umfangreiche Steueriogie notwendig.From FR-A-2 465 164 a generic method for so-called circulation water heaters has become known, which can be switched between two consumer branches by means of a priority switch valve, one of which is a plurality of radiators connected in parallel and / or in series, the others, however, has a domestic hot water tank. The changeover valve is controlled here by a control device which responds when there is a need for reheating in the hot water tank and which reverses the changeover valve in such a way that the heat source is switched to the hot water tank. The control deviation of the water temperature is formed in the storage tank and weighted in high or low heat requirements. The same is done with the heating requirement of the room heating, and by comparing the two heating requirements, the heat source is switched to either the heating or the storage. This requires extensive tax logic.

Im Zuge besserer Wärmedämmung von Einfamilienhäusern und Etagenwohnungen hat sich nun herausgestellt, daß die für die Heizung benötigten Wärmeleistungen der brennstoffbeheizten Wärmequellen immer kleiner werden. Die Leistungsanforderung für Brauchwasser ist dabei aber auf gleicher Höhe geblieben. Wird nun aus Kostenersparnisgründen die Leistung der Wärmequelle verkleinert, so treten nach einer Brauchwasseranforderung erhebliche Ladezeiten für den Brauchwasserbereiter auf, in denen die Heizungsanlage nicht mit Wärme versorgt wird, da nicht nur eine Vorrangschaltung bei Brauchwasserzapfung, sondern auch bei einer anschließenden Brauchwasserbereitarladung besteht.In the course of better thermal insulation of single-family houses and flats, it has now emerged that the heat outputs of the fuel-heated heat sources required for heating are becoming ever smaller. The performance requirement for process water has remained at the same level. If the output of the heat source is reduced for reasons of cost savings, considerable charging times occur for the water heater after a hot water request, in which the heating system is not supplied with heat, since there is not only a priority switch for hot water tapping, but also for a subsequent hot water charge.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zum Umsteuern einer Wärmequelle von einer Heizung auf einen Brauchwasserspeicher zu entwickeln, um das zu starke Absinken der Raumtemperatur zu verhindern, wenn zwar der Brauchwasserspeicher geladen werden muß, ein akuter Bedarf an Brauchwasser jedoch nicht vorliegt.The present invention has for its object to develop a method for reversing a heat source from a heater to a domestic hot water tank to prevent the excessive drop in the room temperature when the domestic hot water tank must be charged, but there is no acute need for domestic water.

Die Lösung dieser Aufgabe besteht in den kennzeichnenden Merkmalen des Patentanspruchs.The solution to this problem consists in the characterizing features of the claim.

Weitere Ausgestaltungen und besonders vorteilhafte Weiterbildungen der Erfindung gehen aus der nachfolgenden Beschreibung hervor, die anhand der Figuren eins bis fünf der Zeichnung ein Ausführungsbeispiel der Erfindung näher beschreibt.Further refinements and particularly advantageous developments of the invention will become apparent from the following description, which describes an exemplary embodiment of the invention in more detail with reference to FIGS. One to five of the drawing.

Es zeigen :

  • Figur eins eine schematische Darstellung einer Wärmequelle mit ihren Verbrauchern,
  • Figur zwei ein Blockschaltbild der Steuereinrichtung und
  • die Figuren drei bis fünf Details der Steuereinrichtung.
Show it :
  • FIG. One is a schematic illustration of a heat source with its consumers,
  • Figure two is a block diagram of the control device and
  • the figures three to five details of the control device.

In allen fünf Figuren bedeuten gleiche Bezugszeichen jeweils die gleichen Einzelheiten.In all five figures, the same reference numerals denote the same details.

Eine brennstoffbeheizte Wärmequelle 1 weist im wesentlichen einen von einem nicht dargestellten Gas- oder Ölbrenner beheizten Wärmetauscher 2 auf, der an eine Rücklaufleitung 3 und an eine Vorlaufleitung 4 angeschlossen ist, in der ein Temperaturfühler 5 angeordnet ist und die an einen Anschluß eines 3-Wege-Umschaltventils 6 angeschlossen ist, das über eine Stellstange 7 von einem Stellmotor 8 beherrscht ist. Der Stellmotor 8 ist über eine Stelleitung 9 von einer Regel- bzw. Steuervorrichtung 10 beherrscht, die über eine Meßleitung 11 mit dem Temperaturfühler 5 verbunden ist.A fuel-heated heat source 1 essentially has a heat exchanger 2 heated by a gas or oil burner (not shown), which is connected to a return line 3 and to a supply line 4, in which a temperature sensor 5 is arranged and which is connected to a 3-way connection Switching valve 6 is connected, which is controlled by an actuator 8 via an actuating rod 7. The servomotor 8 is controlled via a control line 9 by a regulating or control device 10, which is connected to the temperature sensor 5 via a measuring line 11.

Das 3-Wege-Umschaltventil 6 weist einen ersten Auslaßanschluß auf, der zu einer Heizkörpervor- laufleitung 12 führt, an die eine Vielzahl parallel und/oder in Serie geschalteter Heizkörper 13 angeschlossen ist, von denen einer dargestellt ist. der in einem Innenraum 14 eines Gebäudes 15 angeordnet ist. Von den Heizkörpern führt eine Rücklaufleitung 16 über eine Verzweigungsstelle 17 zur Rücklaufleitung 3, in die eine Umwälzpumpe 18 eingeschaltet ist.The 3-way switch valve 6 has a first outlet port on the laufle to a Heizkörpervor- i tung 12, in parallel to a plurality of and / or connected in series-connected heaters 13, one of which is shown. which is arranged in an interior 14 of a building 15. A return line 16 leads from the radiators via a branching point 17 to the return line 3, into which a circulating pump 18 is switched on.

Ein zweiter Auslaßanschluß des 3-Wege-Umschaltventils 6 ist mit einer Brauchwasserbereiter-Vorlaufleitung 19 verbunden, die zu einem Brauchwasserspeicher 20 führt, der über eine Brauchwasserbereitungs-Rücklaufleitung 21 an die Verzweigungsstelle 17 angeschlossen ist. Der Brauchwasserbereiter 20 weist in seinem Innenraum ein Brauchwasserspeichergefäß 22 auf, das über eine Zulaufleitung 23 mit einem speisenden Kaltwassernetz und über eine mit einem Zapfventil 24 versehene Zapfleitung 25 mit einer Vielzahl von Zapfstellen verbunden ist, wobei die Temperatur der Zapfleitung 25 von einem Temperaturfühler 26 abgefühlt ist, der über eine Meßleitung 27 mit der Steuer- und Regelvorrichtung 10 verbunden ist.A second outlet connection of the 3-way switch valve 6 is connected to a hot water supply line 19 which leads to a hot water tank 20 which is connected to the branch point 17 via a hot water return line 21. The domestic hot water heater 20 has in its interior a domestic water storage vessel 22 which is connected to a supplying cold water network via an inlet line 23 and to a plurality of tapping points via a tap line 25 provided with a tap valve 24, the temperature of the tap line 25 being sensed by a temperature sensor 26 is connected to the control and regulating device 10 via a measuring line 27.

Im inneren des Brauchwasserspeichergefäßes 22 ist ein weiterer Temperaturfühler 28 angeordnet, der über eine Meßleitung 29 gleichermaßen mit der Regel- und Steuervorrichtung 10 verbunden ist.A further temperature sensor 28 is arranged in the interior of the domestic water storage vessel 22 and is likewise connected to the regulating and control device 10 via a measuring line 29.

Dem Raum 14 zugehörig ist ein Raumtemperaturfühler 30, der über eine weitere Meßleitung 31 mit der Steuer- und Regelvorrichtung 10 in Verbindung steht.A room temperature sensor 30 belongs to the room 14 and is connected to the control and regulating device 10 via a further measuring line 31.

An der Steuer- und Regelvorrichtung sind Sollwersteller 32, 33 und 34 vorgesehen, an denen Sollwerte für die Vorlauftemperatur, für die Raumtemperatur und für die Brauchwassertemperatur vorgegeben werden können.Setpoint adjusters 32, 33 and 34 are provided on the control and regulating device, on which setpoints for the flow temperature, for the room temperature and for the hot water temperature can be specified.

Aus der Figur zwei gehen wesentliche Teile der Steuer- und Regelvorrichtung 10 hervor insoweit. als daß sie die Unterdrückung des Brauchwasservorrangs bewirkt. Der in die Steuer- und Regelvorrichtung 10 integrierte Vorlauf- und Brauchwassertemperaturregter ist nicht weiter beschrieben.In this respect, essential parts of the control and regulating device 10 can be seen from FIG. than that it suppresses the priming of process water. The one in the tax and regulations direction 10 integrated flow and process water temperature controller is not described further.

Im Teil 40 der Steuer- und Regeleinrichtung kann durch Vergleich der am Sollwertgeber 33 und am Istwertgeber 30 anstehenden Signale festgestellt werden, ob eine Raumtemperaturabsenkung gegenüber dem Sollwert vorliegt.In part 40 of the open-loop and closed-loop control device, it can be determined by comparing the signals present at the setpoint generator 33 and at the actual value generator 30 whether there is a room temperature reduction compared to the setpoint.

Am Teil 41 kann ermittelt werden, beispielsweise über den Temperaturfühler 26 und die Meßleitung 27 oder über einen im Zuge der Leitungen 23 oder 25 angeordneten Zapfwasserschalter, ob eine Brauchwasserzapfung vorliegt. Im Teil 42 kann ermittelt werden, ob eine Brauchwasserspeicherladung nötig ist. Erreicht der vom Fühler 28 über die Meßleitung 29 der Steuer- und Regelvorrichtung 10 mitgeteilte Temperatur-Istwert eine zu große Regelabweichung gegenüber dem am Sollwertsteller 34 eingestellten Sollwert, so spricht das Teil 42 an.It can be determined on part 41, for example via the temperature sensor 26 and the measuring line 27 or via a tap water switch arranged in the course of the lines 23 or 25, whether there is a domestic water tap. In part 42 it can be determined whether a domestic water storage charge is necessary. If the actual temperature value communicated by the sensor 28 via the measuring line 29 to the control and regulating device 10 reaches a control deviation that is too great compared to the setpoint set at the setpoint adjuster 34, the part 42 responds.

Das Teil 40 ist über eine Ausgangsleitung 43 unter Zwischenschaltung eines Negationagliedes 46 mit einem Odergatter 44 verbunden, dessen zweiter Eingang von einer Leitung 45 von dem Teil 41 gebildet wird.The part 40 is connected via an output line 43 with the interposition of a negation element 46 to an OR gate 44, the second input of which is formed by a line 45 from the part 41.

Der Ausgang des Odergliedes ist über eine Leitung 47 mit einem Eingang eines Undgliedes 48 verbunden, dessen zweiter Eingang über eine Leitung 49 mit dem Ausgang des Teils 42 verbunden ist.The output of the OR element is connected via a line 47 to an input of an AND element 48, the second input of which is connected via a line 49 to the output of part 42.

Im Ausgang des Undgliedes 48 ist über eine Leitung 50 der Stellmotor 8 angeschlossen, der das Vorrang-Umschaltventil in Richtung auf Heizbetrieb beziehungsweise Brauchwasserbetrieb umsteuern kann.In the output of the AND element 48, the servomotor 8 is connected via a line 50, which can change over the priority changeover valve in the direction of heating operation or hot water operation.

Die Figur drei zeigt im einzelnen den Teil 40 der Steuer- und Regelvorrichtung 10, der zur Erkennung der eine Regelabweichung überschreitenden Raumtemperaturabsenkung führt. So ist der Raumtemperaturfühler 30 mit seiner Leitung 31 an einen Vergleicher 55 angeschlossen, dessen Ausgang mit einer Leitung 56 an einen weiteren Vergleicher 57 angeschlossen ist. Der Raumtemperatur-Sollwertgeber 32 ist über eine Leitung 58 mit dem anderen Eingang des Vergleichers 55 verbunden. Ein Sollwertgeber 59 für die maximale Sollwert-Temperaturabweichung ist über eine Leitung 60 auf den zweiten Eingang des zweiten Vergleichers 57 geschaltet. Den Ausgang des zweiten Vergleichers bildet die Leitung 43.FIG. Three shows in detail the part 40 of the control and regulating device 10 which leads to the detection of the lowering of the room temperature exceeding a control deviation. Thus, the room temperature sensor 30 is connected with its line 31 to a comparator 55, the output of which is connected with a line 56 to a further comparator 57. The room temperature setpoint generator 32 is connected via a line 58 to the other input of the comparator 55. A setpoint generator 59 for the maximum setpoint temperature deviation is connected via a line 60 to the second input of the second comparator 57. Line 43 forms the output of the second comparator.

Es ist auch möglich, wenn kein Raumtemperaturfühler vorhanden ist, aus der Länge der vorangegangenen Brauchwasseranforderung auf eine etwa erfolgte Raumtemperaturabsenkung zu schließen. In diesem Falle ist es, vergleiche Figur vier, abweichend von dem bisher geschilderten Ausführungsbeispiel möglich, bei Beginn einer Brauchwasserbereitung über ein im Zapfwasserweg liegendes Glied 61 und über eine Leitung 62 ein Zeitglied 63 gemäß Figur vier anzustoßen, nach dessen Ablauf über eine Leitung 64 ein Befehl gegeben wird, nur bei Ladeanforderung für den Brauchwasserspeicher, nicht aber bei Brauchwasserzapfung den Ladevorgang dann zu unterbrechen, wenn eine bestimmte Zeit überschritten wurde, in der den Heizkörpern 13 keine Wärme zugeführt wurde.If there is no room temperature sensor available, it is also possible to infer from the length of the previous process water demand that the room temperature has been reduced. In this case, compare FIG. 4, deviating from the previously described exemplary embodiment, it is possible to trigger a timer 63 in accordance with FIG Command is given to interrupt the charging process only when there is a charging request for the hot water tank, but not when hot water is being drawn off, when a certain time has been exceeded in which no heat has been supplied to the radiators 13.

Aus der Figur fünf ist schließlich eine Schaltung ersichtlich, bei der der Brauchwasserspeicher-Temperaturfühler 28 über seine Leitung 29 einmal mit einem Vergleicher 70 verbunden ist und zum zweiten über eine zur Leitung 29 parallel liegende Leitung 71 auf einen Speicher 72 geschaltet ist. Ein Zeitgeber 73 ist über eine Leitung 74 einmal auf den Vergleicher und zum zweiten parallel hierzu gleichermaßen auf den Speicher 72 geschaltet. Vom Speicher 72 führt ein Leitungsbündel 75 zum Vergleicher, dessen Ausgangsleitung 76 auf den nicht invertierten Eingang des Odergliedes 44, also auf die Leitung 45, geschaltet ist. Die Schaltung gemäß Figur fünf ersetzt dann das Teil 41.Finally, FIG. 5 shows a circuit in which the hot water storage temperature sensor 28 is connected via its line 29 to a comparator 70 and the second is connected to a memory 72 via a line 71 parallel to line 29. A timer 73 is connected via a line 74 once to the comparator and to the second in parallel to the memory 72. A line bundle 75 leads from the memory 72 to the comparator, the output line 76 of which is connected to the non-inverted input of the OR element 44, that is to say to the line 45. The circuit according to FIG. 5 then replaces part 41.

Die in der Figur eins dargestellte Heizungs- und Brauchwasserbereitungsanlage weist im Zusammenhang mit der Steuer- und Regelvorrichtung 10 gemäß Figur zwei folgende Funktion auf :The heating and domestic water preparation system shown in FIG. 1 has the following function in connection with the control and regulating device 10 according to FIG.

Es wird davon ausgegangen, daß der Brauchwasserspeicher 22 geladen ist, das heißt, zwischen dem vom Temperaturfühler 28 gemessenen Istwert und dem am Sollwertgeber 34 eingestellten Sollwert besteht keine Regelabweichung. Damit steuert die Steuer- und Regelvorrichtung 10 das 3-Wege-Umschaltventil 6 in die Lage, daß die-Wärmequelle 1 auf die Heizkörper 13 geschaltet ist. Reicht die dem Raum 15 zugeführte Wärme aus, um die Regelabweichung der Raumtemperatur auf Null zu bringen, so wird die Wärmequelle 1 entweder in einem Pulspausenbetrieb betriebven oder bei Stetig betrieb in ihrer Leistung gedrosselt, so daß die Raumtemperatur geringfügig um die Solltemperatur pendelt.It is assumed that the hot water tank 22 is loaded, that is, there is no control deviation between the actual value measured by the temperature sensor 28 and the setpoint set on the setpoint generator 34. Thus, the control and regulating device 10 controls the 3-way switch valve 6 in the position that the heat source 1 is connected to the radiator 13. If the heat supplied to the room 15 is sufficient to bring the control deviation of the room temperature to zero, then the heat source 1 is either operated in a pulse-pause mode or throttled in its operation during continuous operation, so that the room temperature fluctuates slightly around the set temperature.

Fordert bei diesem Heizbetrieb der Brauchwasserbereiter über den Temperaturfühler 28 Wärme an, wird, da keine nennenswerte Regelabweichung für die Raumtemperatur vorliegt, die Steuer- und Regelvorrichtung 10 das Umschaltventil 6 auf den Brauchwasserbereiter schalten und die Energiezufuhr zu den Heizkörpern 13 unterbrechen.If the domestic hot water heater requests heat in this heating operation via the temperature sensor 28, since there is no significant control deviation for the room temperature, the control and regulating device 10 will switch the changeover valve 6 to the domestic hot water heater and interrupt the energy supply to the radiators 13.

Wird in diesem Zustand der Heizungsanlage das Zapfventil 24 geöffnet, so spricht der Zapfwasserfühler 26 an und sorgt dafür, daß nunmehr die Steuer- und Regelvorrichtung die Stellung des Umschaltventils 6 auf den Brauchwasserbereiter nicht ändert. War die Wärmequelle 1 auf die Heizkörper 13 geschaltet, findet eine Vorrang-Umschaltung auf den Brauchwasserbereiter statt.If the tap valve 24 is opened in this state of the heating system, the tap water sensor 26 responds and ensures that now the control and regulating device does not change the position of the switching valve 6 on the water heater. If the heat source 1 was connected to the radiators 13, priority switching to the domestic hot water heater takes place.

Wird nun für eine bestimmte Zeitspanne Brauchwasser gezapft, so ist der Brauchwasserspeicher mehr oder weniger entleert, das heißt, der Temperaturfühler 28 meldet eine abgesenkte Temperatur. Somit besteht auch nach Beendigung der Brauchwasserzapfung, also nach Rücksetzen des Zapffühlers 26, ein Aufheizbedarf für den Brauchwasserspeicher 22, signalisiert durch den Fühler 28 an die Steuer- und Regelvorrichtung. Diese prüft nunmehr, ob in der Zwischenzeit, bedingt durch die lange Brauchwasserzapfung, die Raumtemperatur eine bestimmte Regelabweichung überschritten hat. Ist die Raumtemperatur unter eine bestimmte am Sollwertgeber 33 einstellbare Schwelle gefallen, resultiert aus dem Teil 40 ein Signal auf die Leitung 43, das vom Negationsglied 46 invertiert wird. Da auf der Leitung 45 noch ein Signal ansteht, bleibt der Ausgang des Odergliedes 44 unverändert. Bei Beendigung der Brauchwasserzapfung ergibt sich eine Signalrücknahme auf der Leitung 45. Somit wird auch das Oderglied 44 an seinem Ausgang 47 keine Spannung mehr abgeben. Besteht noch ein Nachladebedarf für den Brauchwasserbereiter, liefert auch das Teil 42 ein Ausgangssignal auf der Leitung 49, liegt die Raumtemperatur jedoch- immer noch um die Maximal zulässige Abweichung unter dem Sollwert, wird das Undglied 48 nicht durchschaltet. Ein dementsprechendes Signal auf der Leitung 50 bewirkt eine Verstellung des Stellmotors 8 im Hinblick auf ein Aufschalten der Wärmequelle 1 auf den Heizkreis mit den Heizkörpern 13. Erst wenn die dort anstehende Regelabweichung einen bestimmten Wert unterschreitet, wird der Brauchwasserbereiter nachgeladen. Das Nachladen des Brauchwasserbereiters kann intervallweise oder auch in einem Stück geschehen, je nachdem, ob eine bestimmte zugelassen Raumtemperatur-Regelabweichung zugelassen wird oder nicht Wenn in irgendeinem Betriebszustand der Heizungsanlage eine Brauchwasserzapfung und damit ein Ansprechen des Zapffühlers 26 erfolgt, wird die Wärmequelle 1 auf den Brauchwasserbereiter geschaltet.If domestic water is now drawn off for a certain period of time, the domestic water storage tank is more or less emptied, that is to say the temperature sensor 28 reports a reduced temperature. Thus, even after the tap has been tapped, that is to say after the tap sensor 26 has been reset, there is a need to heat the hot water tank 22, signaled by the sensor 28 to the control and regulating device. This now checks whether the room temperature has exceeded a certain control deviation due to the long tap water consumption. If the room temperature is below a certain value on the setpoint device 33 adjustable threshold, part 40 results in a signal on line 43 which is inverted by negation element 46. Since a signal is still present on line 45, the output of the OR element 44 remains unchanged. At the end of the hot water tapping there is a signal withdrawal on line 45. Thus, the OR element 44 will also no longer output any voltage at its output 47. If there is still a need to recharge the domestic hot water heater, part 42 also supplies an output signal on line 49, but if the room temperature is still below the setpoint by the maximum permissible deviation, under-element 48 is not switched through. A corresponding signal on line 50 causes the servomotor 8 to be adjusted with a view to connecting the heat source 1 to the heating circuit with the radiators 13. Only when the control deviation there falls below a certain value is the domestic water heater recharged. The domestic hot water heater can be recharged at intervals or in one piece, depending on whether or not a certain permitted room temperature control deviation is permitted Domestic water heater switched.

Bei dem Ausführungsbeispiel nach Figur vier wird beim Nichtvorhandensein eines Raumtemperaturfühlers die Zeit gemessen, für die die Wärmequelle 1 auf den Brauchwasserbereiter geschaltet war. Wird eine bestimmte einstellbare Zeitspanne überschritten, kann vorausgesetzt werden, daß die Regelabweichung für die Raumtemperatur so groß ist, daß nunmehr bei nicht mehr bestehender Zapfwasseranforderung ein Nachheizen der Heizungsanlage notwendig ist, der Brauchwasserbereiter müßte zwar nachgeheizt werden, um den Speicherinhalt auf die Solltemperatur zu bringen, dies ist aber als gegenüber der Raumwärmeversorgung nachrangig zu betrachten, da ja eine Zapfanforderung zur Zeit nicht vorliegt. Ansonsten ist die Funktion analog zum eben beschriebenen Ausführungsbeispiel.In the exemplary embodiment according to FIG. Four, in the absence of a room temperature sensor, the time is measured for which the heat source 1 was switched to the domestic hot water heater. If a certain adjustable period of time is exceeded, it can be assumed that the control deviation for the room temperature is so large that reheating of the heating system is now necessary if the tap water requirement no longer exists; the domestic hot water heater would have to be reheated in order to bring the storage tank contents up to the set temperature , but this is to be regarded as subordinate to the room heating supply, since there is currently no tap requirement. Otherwise, the function is analogous to the embodiment just described.

Claims (1)

  1. A method of shifting a heat source from a room-heating system to a heater for consumable water where a demand for consumable water takes precedence to room heating, characterized in that the time of a demand for consumable water, i. e., the tapping time, is measured and after a demands for water for consumption a reheating of the storage device for water for consumption is suppressed and the heat source is connected to the room-heating system when the reheating time, i. e., the time for which the heat source (1) has been connected to the storage device (20) for consumable water, has exceeded a predetermined interval of time in which no consumable water has been tapped.
EP84101769A 1983-03-01 1984-02-21 Process for switching over a heat source Expired EP0120283B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84101769T ATE35178T1 (en) 1983-03-01 1984-02-21 METHOD OF REVERSING A HEAT SOURCE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8306143 1983-03-01
DE8306143U 1983-03-01

Publications (3)

Publication Number Publication Date
EP0120283A2 EP0120283A2 (en) 1984-10-03
EP0120283A3 EP0120283A3 (en) 1985-09-04
EP0120283B1 true EP0120283B1 (en) 1988-06-15

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ID=6750662

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Application Number Title Priority Date Filing Date
EP84101769A Expired EP0120283B1 (en) 1983-03-01 1984-02-21 Process for switching over a heat source

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EP (1) EP0120283B1 (en)
AT (1) ATE35178T1 (en)
DE (1) DE3472156D1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2937067A1 (en) * 1979-09-13 1981-04-02 Robert Bosch Gmbh, 7000 Stuttgart HEATING SYSTEM WITH A ROTATING HEAT PUMP
DE3012750A1 (en) * 1980-03-29 1981-11-19 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Heating system with heat source control - times on=off periods of first heat source for delaying on signal for second source

Also Published As

Publication number Publication date
DE3472156D1 (en) 1988-07-21
ATE35178T1 (en) 1988-07-15
EP0120283A3 (en) 1985-09-04
EP0120283A2 (en) 1984-10-03

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