EP0452259B1 - Installation for producing sanitary hot water and method of working the installation - Google Patents

Installation for producing sanitary hot water and method of working the installation Download PDF

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Publication number
EP0452259B1
EP0452259B1 EP91810233A EP91810233A EP0452259B1 EP 0452259 B1 EP0452259 B1 EP 0452259B1 EP 91810233 A EP91810233 A EP 91810233A EP 91810233 A EP91810233 A EP 91810233A EP 0452259 B1 EP0452259 B1 EP 0452259B1
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EP
European Patent Office
Prior art keywords
temperature
water
heat exchanger
hot water
usable
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EP91810233A
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German (de)
French (fr)
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EP0452259A2 (en
EP0452259A3 (en
Inventor
Hans Gerhard
Andreas Fahrni
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Domotec AG
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Domotec AG
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Priority to AT9191810233T priority Critical patent/ATE105626T1/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
    • F24D17/00—Domestic hot-water supply systems

Definitions

  • the invention relates to a method and a device for producing hot domestic water according to the preamble of claims 1 and 3 respectively.
  • a device and a method for producing hot domestic water is known.
  • thermal energy from an external heat circuit was supplied to a process water circuit. It has a heat exchanger, the outlet temperature of which is measured by a temperature measuring element, a flow switch, a bypass, a distributor and a circulating pump which is connected to the inlet of the heat exchanger.
  • the flow switch and the distributor are connected to a buffer tank for hot domestic water.
  • a service water volume determined by the volume of a circuit, consisting of flow switch, bypass, distributor, circulation pump, heat exchanger and again flow switch, brought to a predetermined temperature by repeated circulation in this closed circuit. This volume is then pushed into the buffer storage by switching the flow switch and replaced by a low-temperature hot water volume from the hot water storage, which is then heated again using the above procedure.
  • the domestic water is heated in a cyclical manner.
  • the object of the invention is to provide a method and a device for heating domestic water, in which a timed work is avoided and heating times of a heating system are obtained as long as possible.
  • claims 2 and 4 to 8 are preferred embodiments of the method and the device.
  • the device for producing hot domestic water shown in the single figure has a buffer storage 1 with a lower storage connection area for a cold water inlet 3 and an upper storage connection area for a hot water outlet 5.
  • the cold water inlet 3 and the hot water outlet 5 are connected to the cold water line 7 and the hot water consumption line 9, respectively e.g. B. connected to a house or hotel.
  • a feed line 11 leads from the lower part of the buffer store 1 to a heat exchanger 13 and a hot water outlet line 15 of the heat exchanger 13 opens into the upper part of the buffer store 1 (the hot water outlet line 15 of the heat exchanger 13 is the hot water inlet line of the buffer store 1).
  • the hot water outlet 5 is arranged at the highest point of the buffer store 1 and the connection of the hot water outlet line 15 as close as possible to the hot water outlet 5.
  • the feed line 11 is connected to the output line 15 via a bypass line 17.
  • a three-way valve 19 and between the three-way valve 19 and the connection of the supply line 11 - here designated llb - a pump 21 is arranged on the heat exchanger 13.
  • the three-way valve 19 acts as a shut-off device, with the hot water heated in the heat exchanger 13 the pump 21, depending on the direction of the three-way valve 19, is optionally conveyed in a circuit through the bypass line 17 or into the buffer store 1 or in partial flows through the bypass line 17 and into the buffer store 1, as described below.
  • a temperature measuring device 23 is arranged, which is connected to a control device 25 via an electrical signal line 24.
  • the electrical signal lines or electrical lines mentioned below are shown in dashed lines to distinguish them from the liquid lines.
  • One of the outputs of the control device 25 acts via an electrical line 27 on an actuator 29 which adjusts the three-way valve 19 as described below.
  • two further temperature measuring devices 31 and 32 which are arranged in the upper and in the lower half of the buffer store 1, are connected to the control device 25.
  • the temperature value measured by the temperature measuring device 31 is compared by the control device 25 with a lower temperature threshold value stored in it and, if the temperature falls below the same, a combustion system 34 with a boiler (not shown in more detail) is switched on as an installation for heating hot water as a heat-giving fluid via an electrical line 33.
  • the firing system 34 is connected to a flow and a return line 35 and 36 with the heat exchanger (heat exchanger) 13.
  • a pump 37 is arranged in the flow line 35 and is supplied via an electrical line 39 from the control device 25 is switched on or off.
  • the temperature of the hot water in the boiler is measured using a temperature measuring device 41 connected to the control device 25 via a signal line 40.
  • the pump 37 is switched on via the electrical line 39.
  • the delivery rate of the pump 37 is designed such that a turbulent flow results in the pipes of the heat exchanger 13. In a turbulent flow, optimal heat transfer from the pipe walls to the water flowing in the pipes is guaranteed; the tendency to calcify also decreases.
  • the temperature value measured by the temperature measuring device 32 is compared by the control device 25 with an upper threshold temperature stored in it, and if this is exceeded, the pump 37 is switched off via the electrical line 39 and the firing system 34 via the electrical line 33.
  • a differential pressure measuring device 42 which is connected to the supply line 11 and the output line 15 and which measures the differential pressure of the heat exchanger 13, is connected to the control device 25 via a signal line 43.
  • the flow rate is determined on the basis of the pressure difference of the service water (measured by the differential pressure measuring device 42) between the supply and the outlet lines 11 and 15. If the measured pressure difference exceeds a predetermined value stored in the control device 25, the control device 25 triggers an alarm in an alarm system 45 connected to it by means of an optical and / or acoustic warning signal. An increase in the pressure difference is due to calcification of the heat exchanger 13 possible.
  • the alarm represents a request to decalcify the heat exchanger 13.
  • a temperature measuring device 49 and 50 is arranged in the supply and return lines 35 and 36, and a hot water flow rate measuring device 51 is arranged in the return line 50.
  • the amount of heat absorbed by the heat exchanger 13 is determined from the two temperature values and the flow rate and transmitted to the control device 25 via a signal line 52.
  • the amount of heat absorbed can be queried periodically by the control device 25 by means of a modem (not shown).
  • the buffer store 1, the three-way valve 19, the pumps 21 and 37, the heat exchanger 13, the actuator 29, the temperature measuring devices 23, 31, 32, 49 and 50, the differential pressure measuring device 42, the hot water (boiler water) flow meter 51, the control device 25 , the alarm system 45, the bypass, supply and output lines 17, 11 and 15, the electrical lines 24, 27, 33, 39, 43 and 52 are integrated into a compact, self-contained, prefabricated component 53 which can be transported as a whole.
  • the prefabricated component 53 delimited in the single figure by a dash-dotted line, has a power connection 54 for the control device 25, the alarm system 45 and the two pumps 21 and 37, as well as the cold water inlet 3, the hot water outlet 5 and a schematically indicated connection 55a and 55b for the supply and return lines 35 and 36 and a connection 55c and 55d for the signal line 40 and the electrical line 33 for switching the firing system 34 containing the boiler on and off.
  • the description of the operation of the device begins with a state in which both the hot water and the hot water are cold.
  • the pump 21 is first switched on by the control device 25.
  • the control device 25 determines that the temperature measured with the temperature measuring device 23 is below the stored value of the hot water temperature, it closes with the actuator 29 the connection of the part 11a of the supply line 11 to the three-way valve 19, which is directly connected to the lower part of the buffer tank 1 is connected completely and connects the bypass line 17 to the part 11b of the supply line 11 which is connected to the heat exchanger 13.
  • the pump 21 thus pumps domestic water in a circuit which contains the bypass line 17 and the heat exchanger 13.
  • control device 25 determines that the temperature of the process water in the buffer store 1, measured with the temperature measuring device 31, falls below a lower threshold temperature, and therefore switches the firing system 34 on. As soon as the temperature of the hot water temperature in the boiler measured by the temperature measuring device 41 is greater than the hot water temperature value stored in the control device 25, the pump 37 is switched on via the line 39 by the control device 25 and thus hot water through the supply line 35 into the heat exchanger 13 and from conveyed this back to the boiler via the return line 36. In the heat exchanger 13, heat is now transferred from the hot water to the process water.
  • the control device 25 opens the branch of the three-way valve 19 to the line 11a and the branch to the bypass line 17 so far via the actuator 29. that the temperature measured with the temperature measuring device 23 corresponds to the tolerance in the control device 25 stored hot water temperature value.
  • the pump 21 now drives hot water through the heat exchanger 13, the bypass line 17 and into the buffer store 1.
  • the heated hot water collects in the upper part of the buffer store 1.
  • the heating of the process water continues until the process water temperature measured with the temperature measuring device 32 exceeds a value of the upper threshold temperature stored in the control device 25. If this value is exceeded, the control device 25 switches off both pumps 21 and 37 and the furnace in the furnace 34. By switching off the pump 21 it is avoided that heat is removed from the buffer storage 1 when the firing system 34 is switched off by the heat exchanger 13.
  • hot water is obtained via the hot water pipe 9, it is pressed by the pressure in the cold water pipe 7 from the buffer storage 1 into the hot water pipe 9 to the consumer. Since the buffer store 1 is filled with hot water at constant temperature up to the level of the temperature measuring device 32, the consumer always draws hot water of constant temperature since heat losses in the buffer tank 1 are negligible.
  • the heating process described above starts again as soon as the value of the hot water temperature at the temperature measuring device 31 has dropped to a temperature value below the lower threshold temperature value stored in the control device 25 due to the cold water flowing in. The remaining volume between the height of the temperature measuring device 31 and the hot water outlet 5 is large enough to prevent a delay in the heating phase Collect hot water heating.
  • the pump 21 and the three-way valve 19 can also be arranged in the hot water outlet line 15. It is only necessary to ensure that the pump 21 is connected to one of the process water connections of the heat exchanger 13 before any branching of the process water line - with the exception of the connections for the differential pressure measuring device 42. If the pump 21 is in the supply line 11, the pump outlet is and if it is in the hot water outlet line 15, its input is connected to the corresponding connection of the heat exchanger 13.
  • the three-way valve 19 can optionally be installed in the supply line 11 or in the hot water outlet line 15 and connected to one of the bypass line ends; a change in the control device 25 is not necessary.
  • a thermostatically controllable three-way valve which is not shown, can be used, which is arranged directly from a thermal sensor arranged at the same location as the temperature measuring device 23, which is no longer required is set.
  • thermostatic three-way valve 19 instead of the thermostatic three-way valve 19 described above, a thermostatic two-way valve can be used in line part 11a or in part of line 15 leading from bypass line 17 to accumulator 1.
  • a throttle element is installed in the bypass part 17 for the purpose of system adjustment.
  • the combustion system 34 can be a system with liquid or solid fuels, and an electrical heater can also be used.
  • the output line 15 can also be connected to the hot water outlet 5.
  • the supply line 11 can also be connected directly to the cold water line 7.
  • the device according to the invention for producing hot domestic water has the great advantage that hot domestic water is available for use almost immediately after the supply of heat in the heat exchanger 13, since due to the domestic water circulating completely or partially through the bypass line 17, only a small domestic water volume at the start of heating is heated. Another advantage is that the hot water temperature is constant, irrespective of the amount of hot water that has just been drawn, since the heated hot water is fed to the consumers directly at the outflow of the hot hot water already stored in the buffer tank 1.
  • the operating temperature of the boiler can advantageously be compared to the known hot water treatment plants for the same amount of hot water to be heated, resulting in smaller boiler radiation losses. Due to the lowerable temperature for heating the water, waste heat can also be used with a lower temperature level than the boiler temperature of conventional boilers.
  • the device according to the invention can be designed in such a way that the burner running time specified by the legislator can be achieved, thus ensuring environmentally friendly combustion and avoiding the so-called "clocking" of the burner.
  • the recirculation system on the domestic hot water side enables a broad performance range to be covered with only one type of heat exchanger, due to the varying domestic water temperatures when entering the heat exchanger 13.
  • a constant heat output is transmitted in the heat exchanger 13 as soon as the domestic water pump 21 and the hot water pump 37 convey it through it, since on the one hand the volume flows and the temperatures in the domestic and hot water branch are largely constant .
  • the temperature in the hot water branch is given by an almost constant supply of energy from the furnace in system 34.
  • the dhw temperature is kept essentially constant regardless of the cold water temperature with the three-way valve 19.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
  • Domestic Plumbing Installations (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Massaging Devices (AREA)
  • Details Of Fluid Heaters (AREA)

Abstract

The installation for producing sanitary hot water has a buffer accumulator (1) which is connected to the cold water pipe (7) and to the hot water service pipe (9) of a building. From the accumulator part of the buffer accumulator (1), to which the cold water pipe (7) is connected, a supply pipe (11) leads to a heat exchanger (13), and from the accumulator part which is connected to the hot water service pipe (9), a hot water outlet pipe (15) leads to the heat exchanger (13). Supply and outlet pipes (11, 15) can be completely or partially bridged by means of a shut-off member (19) and a bypass pipe (1). The installation according to the invention provides sanitary hot water immediately after the supply of heat by the heat exchanger (13) since, because of the sanitary water which circulates completely or partially through the bypass pipe (17), only a small volume of sanitary water is heated at the beginning of heating. Moreover, a constantly hot sanitary water temperature is maintained irrespectively of the quantity of sanitary water just removed, since the heated sanitary water is removed from the consumer directly at the outflow of the sanitary hot water already stored in the buffer accumulator (1). <IMAGE>

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Erzeugung von warmem Brauchwasser gemäß dem Oberbegriff des Patentanspruchs 1 bzw. 3.3. The invention relates to a method and a device for producing hot domestic water according to the preamble of claims 1 and 3 respectively.

Aus der DE-A 32 38 285 ist eine Vorrichtung und ein Verfahren zur Erzeugung von warmem Brauchwasser bekannt. Bei der bekannten Vorrichtung wurde Wärmeenergie aus einem äußeren Wärmekreislauf einem Brauchwasserkreislauf zugeführt. Sie hat einen Wärmetauscher, dessen Auslaßtemperatur mit einem Temperaturmeßelement gemessen wird, ferner einen Strömungsumschalter, einen Bypaß, ein Verteilerstück und eine Umwälzpumpe, welche mit dem Einlaß des Wärmetauschers verbunden ist. Der Strömungsumschalter und das Verteilerstück sind mit einem Pufferspeicher für warmes Brauchwasser verbunden. Durch diese Anordnung wird ein Brauchwasservolumen, bestimmt durch das Volumen eines Kreislaufes, bestehend aus Strömungsumschalter, Bypaß, Verteilerstück, Umwälzpumpe Wärmetauscher und wieder Strömungsumschalter, durch mehrmalige Zirkulation in diesem geschlossenen Kreislauf auf eine vorgegebene Temperatur gebracht. Dieses Volumen wird dann durch Umschalten des Strömungsumschalters in den Pufferspeicher eingeschoben und durch ein Brauchwasservolumen niedriger Temperatur aus dem Brauchwasserspeicher ersetzt, welches anschließend wieder mittels obigem Vorgang erwärmt wird. Die Erwärmung des Brauchwassers erfolgt in einer getakteten Arbeitsweise.From DE-A 32 38 285 a device and a method for producing hot domestic water is known. In the known device, thermal energy from an external heat circuit was supplied to a process water circuit. It has a heat exchanger, the outlet temperature of which is measured by a temperature measuring element, a flow switch, a bypass, a distributor and a circulating pump which is connected to the inlet of the heat exchanger. The flow switch and the distributor are connected to a buffer tank for hot domestic water. By this arrangement a service water volume, determined by the volume of a circuit, consisting of flow switch, bypass, distributor, circulation pump, heat exchanger and again flow switch, brought to a predetermined temperature by repeated circulation in this closed circuit. This volume is then pushed into the buffer storage by switching the flow switch and replaced by a low-temperature hot water volume from the hot water storage, which is then heated again using the above procedure. The domestic water is heated in a cyclical manner.

Aufgabe der Erfindung ist es, ein Verfahren und eine Vorrichtung zur Erwärmung von Brauchwasser zu schaffen, bei dem bzw. der ein getaktetes Arbeiten vermieden wird und möglichst lange Heizzeiten einer Heizungsanlage erhalten werden.The object of the invention is to provide a method and a device for heating domestic water, in which a timed work is avoided and heating times of a heating system are obtained as long as possible.

Die Lösung der Aufgabe hinsichtlich des Verfahrens ist Gegenstand des Patentanspruchs 1 und hinsichtlich der Vorrichtung Gegenstand des Patentanspruchs 3.The solution to the problem with regard to the method is the subject of claim 1 and with respect to the device the subject of claim 3.

Gegenstand der Ansprüche 2 sowie 4 bis 8 sind bevorzugte Ausführungsformen des Verfahrens bzw. der Vorrichtung.The subject of claims 2 and 4 to 8 are preferred embodiments of the method and the device.

Im folgenden werden Beispiele der erfindungsgemäßen Vorrichtung sowie des Verfahrens anhand eines prinzipiellen Blockschemas einer Vorrichtung zur Erzeugung von warmem Brauchwasser erläutert.Examples of the device according to the invention and of the method are explained below on the basis of a basic block diagram of a device for producing hot domestic water.

Die in der einzigen Figur dargestellte Vorrichtung zur Erzeugung von warmem Brauchwasser hat einen Pufferspeicher 1 mit einem unteren Speicheranschlußbereich für einen Kaltwassereinlaß 3 und einem oberen Speicheranschlußbereich für einen Warmwasserauslaß 5. Der Kaltwassereinlaß 3 und der Warmwasserauslaß 5 sind an die Kaltwasserleitung 7 bzw. die Warmwasserbrauchleitung 9 z. B. eines Wohnhauses oder Hotels angeschlossen. Vom unteren Teil des Pufferspeichers 1 führt eine Zufuhrleitung 11 zu einem Wärmeübertrager 13 und in den oberen Teil des Pufferspeichers 1 mündet eine Warmwasserausgangsleitung 15 des Wärmeübertragers 13. (Die Warmwasserausgangsleitung 15 des Wärmeübertragers 13 ist die Warmwassereingangsleitung des Pufferspeichers 1). Der Warmwasserauslaß 5 ist am höchsten Punkt des Pufferspeichers 1 und der Anschluß der Warmwasserausgangsleitung 15 möglichst nahe am Warmwasserauslaß 5 angeordnet.The device for producing hot domestic water shown in the single figure has a buffer storage 1 with a lower storage connection area for a cold water inlet 3 and an upper storage connection area for a hot water outlet 5. The cold water inlet 3 and the hot water outlet 5 are connected to the cold water line 7 and the hot water consumption line 9, respectively e.g. B. connected to a house or hotel. A feed line 11 leads from the lower part of the buffer store 1 to a heat exchanger 13 and a hot water outlet line 15 of the heat exchanger 13 opens into the upper part of the buffer store 1 (the hot water outlet line 15 of the heat exchanger 13 is the hot water inlet line of the buffer store 1). The hot water outlet 5 is arranged at the highest point of the buffer store 1 and the connection of the hot water outlet line 15 as close as possible to the hot water outlet 5.

Die Zufuhrleitung 11 ist über eine Bypaßleitung 17 mit der Ausgangsleitung 15 verbunden. An der Verbindungsstelle der Bypaß 17 mit der Zufuhrleitung 11 ist ein Dreiwegeventil 19 und zwischen dem Dreiwegeventil 19 und dem Anschluß der Zufuhrleitung 11 - hier mit llb bezeichnet - am Wärmeübertrager 13 eine Pumpe 21 angeordnet. Das Dreiwegeventil 19 wirkt als Absperreinrichtung, wobei das im Wärmeübertrager 13 erwärmte Brauchwasser mit der Pumpe 21 je nach Steilung des Dreiwegeventils 19 wahlweise im Kreislauf durch die Bypaßleitung 17 oder in den Pufferspeicher 1 oder in Teilströmen durch die Bypaßleitung 17 und in den Pufferspeicher 1 gefördert wird, wie unten beschrieben.The feed line 11 is connected to the output line 15 via a bypass line 17. At the junction of the bypass 17 with the supply line 11, a three-way valve 19 and between the three-way valve 19 and the connection of the supply line 11 - here designated llb - a pump 21 is arranged on the heat exchanger 13. The three-way valve 19 acts as a shut-off device, with the hot water heated in the heat exchanger 13 the pump 21, depending on the direction of the three-way valve 19, is optionally conveyed in a circuit through the bypass line 17 or into the buffer store 1 or in partial flows through the bypass line 17 and into the buffer store 1, as described below.

Zwischen dem Anschluß der Ausgangsleitung 15 am Wärmeübertrager 13 und der Einmündung der Bypaßleitung 17 in die Ausgangsleitung 15, ist eine Temperaturmeßeinrichtung 23 angeordnet, welche über eine elektrische Signalleitung 24 mit einer Regeleinrichtung 25 verbunden ist. Die im folgenden erwähnten elektrischen Signalleitungen bzw. elektrischen Leitungen sind zur Unterscheidung gegenüber den Flüssigkeitsleitungen gestrichelt dargestellt. Einer der Ausgänge der Regeleinrichtung 25 wirkt über eine elektrische Leitung 27 auf ein Stellglied 29, welches das Dreiwegeventil 19, wie unten beschrieben, verstellt.Between the connection of the output line 15 to the heat exchanger 13 and the confluence of the bypass line 17 and the output line 15, a temperature measuring device 23 is arranged, which is connected to a control device 25 via an electrical signal line 24. The electrical signal lines or electrical lines mentioned below are shown in dashed lines to distinguish them from the liquid lines. One of the outputs of the control device 25 acts via an electrical line 27 on an actuator 29 which adjusts the three-way valve 19 as described below.

Außer der Temperaturmeßeinrichtung 23 in der Ausgangsleitung 15 sind mit der Regeleinrichtung 25 zwei weitere Temperaturmeßeinrichtungen 31 und 32, welche in der oberen bzw. in der unteren Hälfte des Pufferspeichers 1 angeordnet sind, verbunden. Der von der Temperaturmeßeinrichtung 31 gemessene Temperaturwert wird von der Regeleinrichtung 25 mit einem in ihr abgespeicherten unteren Temperaturschwellwert verglichen und bei Unterschreiten desselben eine Feuerungsanlage 34 mit nicht näher dargestelltem Heizkessel als Anlage zur Erhitzung von Heißwasser als Wärme abgebendes Fluid über eine elektrische Leitung 33 eingeschaltet. Die Feuerungsanlage 34 ist mit einer Vorlauf- und einer Rücklaufleitung 35 und 36 mit dem Wärmeübertrager (Wärmetauscher) 13 verbunden. In der Vorlaufleitung 35 ist eine Pumpe 37 angeordnet, welche über eine elektrische Leitung 39 von der Regeleinrichtung 25 ein- bzw. ausgeschaltet wird. Die Temperatur des Heißwassers im Heizkessel wird mit einer über eine Signalleitung 40 mit der Regeleinrichtung 25 verbundene Temperaturmeßeinrichtung 41 gemessen. Bei Erreichen eines in der Regeleinrichtung 25 abgespeicherten Heißwassertemperaturwertes wird die Pumpe 37 über die elektrische Leitung 39 eingeschaltet. Die Förderleistung der Pumpe 37 ist wie die der Pumpe 21 so ausgelegt, daß sich in den Rohrleitungen des Wärmeübertragers 13 eine turbulente Strömung ergibt. Bei einer turbulenten Strömung ist ein optimaler Wärmeübergang von den Rohrleitungswänden auf das in den Rohren fließende Wasser gewährleistet; ebenfalls verringert sich die Neigung zum Verkalken.In addition to the temperature measuring device 23 in the output line 15, two further temperature measuring devices 31 and 32, which are arranged in the upper and in the lower half of the buffer store 1, are connected to the control device 25. The temperature value measured by the temperature measuring device 31 is compared by the control device 25 with a lower temperature threshold value stored in it and, if the temperature falls below the same, a combustion system 34 with a boiler (not shown in more detail) is switched on as an installation for heating hot water as a heat-giving fluid via an electrical line 33. The firing system 34 is connected to a flow and a return line 35 and 36 with the heat exchanger (heat exchanger) 13. A pump 37 is arranged in the flow line 35 and is supplied via an electrical line 39 from the control device 25 is switched on or off. The temperature of the hot water in the boiler is measured using a temperature measuring device 41 connected to the control device 25 via a signal line 40. When a hot water temperature value stored in the control device 25 is reached, the pump 37 is switched on via the electrical line 39. The delivery rate of the pump 37, like that of the pump 21, is designed such that a turbulent flow results in the pipes of the heat exchanger 13. In a turbulent flow, optimal heat transfer from the pipe walls to the water flowing in the pipes is guaranteed; the tendency to calcify also decreases.

Der von der Temperaturmeßeinrichtung 32 gemessene Temperaturwert wird von der Regeleinrichtung 25 mit einer in ihr abgespeicherten oberen Schwelltemperatur verglichen und bei Überschreiten derselben die Pumpe 37 über die elektrische Leitung 39 und die Feuerungsanlage 34 über die elektrische Leitung 33 abgeschaltet.The temperature value measured by the temperature measuring device 32 is compared by the control device 25 with an upper threshold temperature stored in it, and if this is exceeded, the pump 37 is switched off via the electrical line 39 and the firing system 34 via the electrical line 33.

Ein mit der Zufuhrleitung 11 und der Ausgangsleitung 15 verbundenes Differenzdruckmessgerät 42, welches den Differenzdruck des Wärmeübertragers 13 misst, ist über eine Signalleitung 43 mit der Regeleinrechtung 25 verbunden. Die Durchflußmenge wird aufgrund der (vom Differenzdruckmessgerät 42 gemessenen) Druckdifferenz des Brauchwassers zwischen der Zufuhr- und der Ausgangsleitung 11 und 15 bestimmt. Überschreitet die gemessene Druckdifferenz einen vorgegebenen, in der Regeleinrichtung 25 abgespeicherten Wert, wird von der Regeleinrichtung 25 in einer mit ihr verbundenen Alarmanlage 45 ein Alarm mittels eines optischen und/oder akustischen Warnsignals ausgelöst. Ein Anstieg der Druckdifferenz ist durch Verkalken des Wärmeübertragers 13 möglich. Der Alarm stellt eine Aufforderung dar, den Wärmeübertrager 13 zu entkalken.A differential pressure measuring device 42, which is connected to the supply line 11 and the output line 15 and which measures the differential pressure of the heat exchanger 13, is connected to the control device 25 via a signal line 43. The flow rate is determined on the basis of the pressure difference of the service water (measured by the differential pressure measuring device 42) between the supply and the outlet lines 11 and 15. If the measured pressure difference exceeds a predetermined value stored in the control device 25, the control device 25 triggers an alarm in an alarm system 45 connected to it by means of an optical and / or acoustic warning signal. An increase in the pressure difference is due to calcification of the heat exchanger 13 possible. The alarm represents a request to decalcify the heat exchanger 13.

In den Vor- und Rücklaufleitungen 35 und 36 ist je eine Temperaturmeßeinrichtung 49 und 50 sowie in der Rücklaufleitung 50 ein Heißwasserdurchflußmengenmeßgerät 51 angeordnet. Aus den beiden Temperaturwerten und der Durchflußmenge wird die vom Wärmeübertrager 13 aufgenommene Wärmemenge bestimmt und an die Regeleinrichtung 25 über eine Signalleitung 52 übertragen. Von der Regeleinrichtung 25 kann die aufgenommene Wärmemenge mittels eines nicht dargestellten Modems periodisch abgefragt werden.A temperature measuring device 49 and 50 is arranged in the supply and return lines 35 and 36, and a hot water flow rate measuring device 51 is arranged in the return line 50. The amount of heat absorbed by the heat exchanger 13 is determined from the two temperature values and the flow rate and transmitted to the control device 25 via a signal line 52. The amount of heat absorbed can be queried periodically by the control device 25 by means of a modem (not shown).

Der Pufferspeicher 1, das Dreiwegeventil 19, die Pumpen 21 und 37, der Wärmeübertrager 13, das Stellglied 29, die Temperaturmeßeinrichtungen 23, 31, 32, 49 und 50, das Differenzdruckmessgerät 42, das Heißwasser(Heizkesselwasser-) Durchflußmengenmeßgerät 51, die Regeleinrichtung 25, die Alarmanlage 45, die Bypaß-, Zufuhr- und Ausgangsleitung 17, 11 und 15, die elektrischen Leitungen 24, 27, 33, 39, 43 und 52 sind zu einem kompakten, in sich abgeschlossenen, als Ganzes transportierbaren Fertigbauteil 53 integriert. Der Fertigbauteil 53, in der einzigen Figur durch eine strichpunktierte Linie umgrenzt, hat einen Stromanschluß 54 für die Regeleinrichtung 25, die Alarmanlage 45 und die beiden Pumpen 21 und 37, sowie den Kaltwassereinlaß 3, den Warmwasserauslaß 5 und je einen schematisch angedeuteten Anschluß 55a und 55b für die Vorlauf- und Rücklaufleitung 35 und 36 und je einen Anschluß 55c und 55d für die Signalleitung 40 und die elektrische Leitung 33 zum Ein- und Ausschalten der den Heizkessel enthaltenden Feuerungsanlage 34.The buffer store 1, the three-way valve 19, the pumps 21 and 37, the heat exchanger 13, the actuator 29, the temperature measuring devices 23, 31, 32, 49 and 50, the differential pressure measuring device 42, the hot water (boiler water) flow meter 51, the control device 25 , the alarm system 45, the bypass, supply and output lines 17, 11 and 15, the electrical lines 24, 27, 33, 39, 43 and 52 are integrated into a compact, self-contained, prefabricated component 53 which can be transported as a whole. The prefabricated component 53, delimited in the single figure by a dash-dotted line, has a power connection 54 for the control device 25, the alarm system 45 and the two pumps 21 and 37, as well as the cold water inlet 3, the hot water outlet 5 and a schematically indicated connection 55a and 55b for the supply and return lines 35 and 36 and a connection 55c and 55d for the signal line 40 and the electrical line 33 for switching the firing system 34 containing the boiler on and off.

Die Beschreibung des Betriebes der Vorrichtung beginnt bei einem Zustand, in dem sowohl das Brauchwasser, wie auch das Heißwasser kalt sind. Beim Einschalten der Vorrichtung wird zuerst die Pumpe 21 durch die Regeleinrichtung 25 eingeschaltet. Die Regeleinrichtung 25 stellt fest, daß die mit der Temperaturmeßeinrichtung 23 gemessene Temperatur unter dem abgespeicherten Wert der Brauchwassertemperatur liegt, sie schließt mit dem Stellglied 29 den Anschluß des Teils 11a der Zufuhrleitung 11 an dem Dreiwegeventil 19, der direkt mit dem unteren Teil des Pufferspeichers 1 verbunden ist, vollständig und verbindet die Bypaßleitung 17 mit dem Teil 11b der Zufuhrleitung 11, der mit dem Wärmeübertrager 13 verbunden ist. Die Pumpe 21 fördert somit Brauchwasser in einem Kreislauf, der die Bypaßleitung 17 und den Wärmeübertrager 13 enthält. Ferner stellt die Regeleinrichtung 25 fest, daß die mit der Temperaturmeßeinrichtung 31 gemessene Temperatur des Brauchwassers in dem Pufferspeicher 1 eine untere Schwelltemperatur unterschreitet, sie schaltet deshalb die Feuerungsanlage 34 ein. Sobald die Temperatur der mit der Temperaturmeßeinrichtung 41 gemessenen Heißwassertemperatur im Heizkessel größer als der in der Regeleinrichtung 25 gespeicherte Heißwassertemperaturwert ist, wird die Pumpe 37 über die Leitung 39 von der Regeleinrichtung 25 eingeschaltet und damit Heißwasser durch die Vorlaufleitung 35 in den Wärmeübertrager 13 hinein und von diesem über die Rücklaufleitung 36 zurück zum Heizkessel gefördert. Im Wärmeübertrager 13 wird nun Wärme vom Heißwasser auf das Brauchwasser übertragen. Sobald die mit der Temperaturmeßeinrichtung 23 gemessene Brauchwassertemperatur den in der Regeleinrichtung 25 abgespeicherten Brauchwassertemperaturwert erreicht, wird von der Regeleinrichtung 25 über das Stellglied 29 der Zweig des Dreiwegeventils 19 zur Leitung 11a soweit geöffnet und der Zweig zur Bypaßleitung 17 soweit geschlossen, daß die mit der Temperaturmeßeinrichtung 23 gemessene Temperatur bis auf eine Toleranz dem in der Regeleinrichtung 25 abgespeicherten Brauchwassertemperaturwert entspricht. Die Pumpe 21 treibt jetzt Brauchwasser durch den Wärmeübertrager 13, die Bypaßleitung 17 und in den Pufferspeicher 1. Im oberen Teil des Pufferspeichers 1 sammelt sich das erwärmte Brauchwasser. Die Erwärmung des Brauchwassers wird fortgesetzt, bis die mit der Temperaturmeßeinrichtung 32 gemessene Brauchwassertemperatur einen in der Regeleinrichtung 25 abgespeicherten Wert der oberen Schwelltemperatur überschreitet. Ist dieser Wert überschritten, stellt die Regeleinrichtung 25 beide Pumpen 21 und 37 sowie die Feuerung in der Feuerungsanlage 34 ab. Durch das Abstellen der Pumpe 21 wird vermieden, daß aus dem Pufferspeicher 1 bei ausgeschalteter Feuerungsanlage 34 durch den Wärmeübertrager 13 Wärme entzogen wird.The description of the operation of the device begins with a state in which both the hot water and the hot water are cold. When the device is switched on, the pump 21 is first switched on by the control device 25. The control device 25 determines that the temperature measured with the temperature measuring device 23 is below the stored value of the hot water temperature, it closes with the actuator 29 the connection of the part 11a of the supply line 11 to the three-way valve 19, which is directly connected to the lower part of the buffer tank 1 is connected completely and connects the bypass line 17 to the part 11b of the supply line 11 which is connected to the heat exchanger 13. The pump 21 thus pumps domestic water in a circuit which contains the bypass line 17 and the heat exchanger 13. Furthermore, the control device 25 determines that the temperature of the process water in the buffer store 1, measured with the temperature measuring device 31, falls below a lower threshold temperature, and therefore switches the firing system 34 on. As soon as the temperature of the hot water temperature in the boiler measured by the temperature measuring device 41 is greater than the hot water temperature value stored in the control device 25, the pump 37 is switched on via the line 39 by the control device 25 and thus hot water through the supply line 35 into the heat exchanger 13 and from conveyed this back to the boiler via the return line 36. In the heat exchanger 13, heat is now transferred from the hot water to the process water. As soon as the hot water temperature measured with the temperature measuring device 23 reaches the hot water temperature value stored in the control device 25, the control device 25 opens the branch of the three-way valve 19 to the line 11a and the branch to the bypass line 17 so far via the actuator 29. that the temperature measured with the temperature measuring device 23 corresponds to the tolerance in the control device 25 stored hot water temperature value. The pump 21 now drives hot water through the heat exchanger 13, the bypass line 17 and into the buffer store 1. The heated hot water collects in the upper part of the buffer store 1. The heating of the process water continues until the process water temperature measured with the temperature measuring device 32 exceeds a value of the upper threshold temperature stored in the control device 25. If this value is exceeded, the control device 25 switches off both pumps 21 and 37 and the furnace in the furnace 34. By switching off the pump 21 it is avoided that heat is removed from the buffer storage 1 when the firing system 34 is switched off by the heat exchanger 13.

Wird Brauchwasser über die Warmwasserbrauchleitung 9 bezogen, so wird dieses durch den Druck in der Kaltwasserleitung 7 aus dem Pufferspeicher 1 in die Warmwasserbrauchleitung 9 zum Verbraucher gedrückt. Da der Pufferspeichers 1 bis in Höhe der Temperaturmeßeinrichtung 32 mit Brauchwasser konstanter Temperatur gefüllt ist, bezieht der Verbraucher, da Wärmeverluste im Pufferspeicher 1 vernachlässigbar sind, immer Brauchwasser konstanter Temperatur. Der oben beschriebene Heizvorgang setzt wieder ein, sobald der Wert der Brauchwassertemperatur in Höhe der Temperaturmeßeinrichtung 31 durch das nachströmende kalte Wasser auf einen Temperaturwert unterhalb des in der Regeleinrichtung 25 abgespeicherten unteren Schwelltemperaturwert abgefallen ist. Das verbleibende Volumen zwischen der Höhe der Temperaturmeßeinrichtung 31 und dem Warmwasserauslaß 5 ist groß genug, um eine während der Aufheizphase eintretende Verzögerung in der Brauchwassererwärmung aufzufangen.If hot water is obtained via the hot water pipe 9, it is pressed by the pressure in the cold water pipe 7 from the buffer storage 1 into the hot water pipe 9 to the consumer. Since the buffer store 1 is filled with hot water at constant temperature up to the level of the temperature measuring device 32, the consumer always draws hot water of constant temperature since heat losses in the buffer tank 1 are negligible. The heating process described above starts again as soon as the value of the hot water temperature at the temperature measuring device 31 has dropped to a temperature value below the lower threshold temperature value stored in the control device 25 due to the cold water flowing in. The remaining volume between the height of the temperature measuring device 31 and the hot water outlet 5 is large enough to prevent a delay in the heating phase Collect hot water heating.

Anstelle die Pumpe 21 zusammen mit der Pumpe 37 abzuschalten, ist es vorteilhaft die Pumpe 21 nach Abschalten der Pumpe 37 eine kurze Zeit weiterlaufen zu lassen. Hierdurch verringert sich die Kalkabscheidung im Wärmetauscher 13.Instead of switching off the pump 21 together with the pump 37, it is advantageous to keep the pump 21 running for a short time after switching off the pump 37. As a result, the lime deposit in the heat exchanger 13 is reduced.

Anstelle die Pumpe 21 und das Dreiwegeventil 19 in der Zufuhrleitung 11 anzuordnen, kann die Pumpe 21 und/oder das Dreiwegeventil 19 auch in der Warmwasserausgangsleitung 15 angeordnet werden. Es ist lediglich darauf zu achten, daß die Pumpe 21 vor jeglicher Verzweigung der Brauchwasserleitung - ausgenommen die Anschlüsse für das Differenzdruckmessgerät 42 - an einen der Brauchwasseranschlüsse des Wärmeübertragers 13 angeschlossen wird. Befindet sich die Pumpe 21 in der Zufuhrleitung 11, so ist der Pumpenausgang und befindet sie sich in der Warmwasserausgangsleitung 15 so ist ihr Eingang mit dem entsprechenden Anschluß des Wärmeübertragers 13 verbunden. Das Dreiwegeventil 19 kann wahlweise in die Zufuhrleitung 11 oder in die Warmwasserausgangsleitung 15 eingebaut werden und mit einem der Bypaßleitungsenden verbunden werden; eine Änderung in der Regeleinrichtung 25 ist nicht notwendig.Instead of arranging the pump 21 and the three-way valve 19 in the supply line 11, the pump 21 and / or the three-way valve 19 can also be arranged in the hot water outlet line 15. It is only necessary to ensure that the pump 21 is connected to one of the process water connections of the heat exchanger 13 before any branching of the process water line - with the exception of the connections for the differential pressure measuring device 42. If the pump 21 is in the supply line 11, the pump outlet is and if it is in the hot water outlet line 15, its input is connected to the corresponding connection of the heat exchanger 13. The three-way valve 19 can optionally be installed in the supply line 11 or in the hot water outlet line 15 and connected to one of the bypass line ends; a change in the control device 25 is not necessary.

Anstelle des oben beschriebenen Dreiwegeventils 19, welches aufgrund der Temperaturmessung mit der Temperaturmereinrichtung 23 über die Regeleinrichtung 25 angesteuert wird, kann auch ein nicht dargestelltes thermostatisch ansteuerbares Dreiwegeventil verwendet werden, welches direkt von einem am selben Ort wie die nun nicht mehr benötigte Temperaturmeßeinrichtung 23 angeordneten Thermofühler eingestellt wird.Instead of the three-way valve 19 described above, which is controlled by the temperature measuring device 23 via the control device 25 on the basis of the temperature measurement, a thermostatically controllable three-way valve, which is not shown, can be used, which is arranged directly from a thermal sensor arranged at the same location as the temperature measuring device 23, which is no longer required is set.

Ebenfalls kann an Stelle des oben beschriebenen, thermostatischen Dreiwegeventils 19 ein thermostatisches Durchgangsventil im Leitungsteil 11a oder im von der Bypassleitung 17 zum Speicher 1 führenden Teil der Leitung 15 verwendet werden. In den Bypassteil 17 wird Dabei ein Drosselorgan zwecks Systemabgleich eingebaut.Likewise, instead of the thermostatic three-way valve 19 described above, a thermostatic two-way valve can be used in line part 11a or in part of line 15 leading from bypass line 17 to accumulator 1. A throttle element is installed in the bypass part 17 for the purpose of system adjustment.

Bei der Feuerungsanlage 34 kann es sich um eine Anlage mit flüssigen oder festen Brennstoffen handeln, auch kann eine elektrische Heizung verwendet werden.The combustion system 34 can be a system with liquid or solid fuels, and an electrical heater can also be used.

Anstelle die Ausgangsleitung 15 in den Pufferspeicher 1, wie in der einzigen Figur dargestellt, direkt hineinzuführen, kann sie auch mit dem Warmwasserauslaß 5 verbunden werden. Analog kann auch die Zufuhrleitung 11 direkt mit der Kaltwasserleitung 7 verbunden werden.Instead of leading the output line 15 directly into the buffer store 1, as shown in the single figure , it can also be connected to the hot water outlet 5. Analogously, the supply line 11 can also be connected directly to the cold water line 7.

Die erfindungsgemäße Vorrichtung zur Erzeugung von warmem Brauchwasser hat den großen Vorteil, daß nahezu unmittelbar nach der Zufuhr von Wärme im Wärmeübertrager 13 warmes Brauchwasser zur Verwendung vorhanden ist, da aufgrund des durch die Bypaßleitung 17 vollständig bzw. teilweise zirkulierenden Brauchwassers nur ein kleines Brauchwasservolumen bei Heizbeginn erwärmt wird. Als weiterer Vorteil ergibt sich eine konstant warme Brauchwassertemperatur unabhängig von der gerade entnommen Brauchwassermenge, da das erwärmte Brauchwasser unmittelbar am Ausfluß des bereits gespeicherten warmen Brauchwassers im Pufferspeicher 1 den Verbrauchern zugeführt wird.The device according to the invention for producing hot domestic water has the great advantage that hot domestic water is available for use almost immediately after the supply of heat in the heat exchanger 13, since due to the domestic water circulating completely or partially through the bypass line 17, only a small domestic water volume at the start of heating is heated. Another advantage is that the hot water temperature is constant, irrespective of the amount of hot water that has just been drawn, since the heated hot water is fed to the consumers directly at the outflow of the hot hot water already stored in the buffer tank 1.

In der erfindungsgemäßen Vorrichtung kann gegenüber den bekannten Warmwasseraufbereitungsanlagen vorteilhaft die Betriebstemperatur des Heizkessels bei gleicher Menge von zu erwärmendem Warmwasser herabgesetzt werden, wodurch sich kleinere Kesselabstrahlverluste ergeben. Aufgrund der herabgestzbaren Temperatur zum Aufheizen des Wasser kann auch eine Abwärmenutzung mit gegenüber der Kesseltemperatur herkömmlicher Kessel tieferem Temperaturniveau verwendet werden.In the device according to the invention, the operating temperature of the boiler can advantageously be compared to the known hot water treatment plants for the same amount of hot water to be heated, resulting in smaller boiler radiation losses. Due to the lowerable temperature for heating the water, waste heat can also be used with a lower temperature level than the boiler temperature of conventional boilers.

Die erfindungsgemäße Vorrichtung läßt sich so auslegen, daß die vom Gesetzgeber minimal vorgegebene Brennerlaufzeit erreicht werden kann und somit eine umweltfreundliche Verbrennung gewährleistet und das sogenannte "Takten" des Brenners vermieden wird.The device according to the invention can be designed in such a way that the burner running time specified by the legislator can be achieved, thus ensuring environmentally friendly combustion and avoiding the so-called "clocking" of the burner.

Durch die im Anspruch 9 beschriebene, kompakte Anlage ergeben sich nur kurze Betriebsunterbrechungen im Servicefall, was eine Kostenreduktion für den Benützer ergibt.Due to the compact system described in claim 9, there are only brief interruptions in service, which results in a cost reduction for the user.

Das Rezirkulationssystem auf der Brauchwarmwasserseite ermöglicht, dass mit nur einem Wärmeübertragertyp ein breiter Leistungsbereich abgedeckt werden kann, bedingt durch die variierenden Brauchwassertemperaturen beim Eintritt in den Wäremübertrager 13.The recirculation system on the domestic hot water side enables a broad performance range to be covered with only one type of heat exchanger, due to the varying domestic water temperatures when entering the heat exchanger 13.

Abgesehen von der Aufheizphase der Vorrichtung wird im Wärmeübertrager 13, sobald mit der Pumpe 21 Brauchwasser und mit der Pumpe 37 Heißwasser durch ihn gefördert wird, eine konstante Wärmeleistung übertragen, da einerseits die Volumenströme und auch die Temperaturen im Brauch- und im Heißwasserzweig weitgehend konstant sind. Die Tem-peratur im Heißwasserzweig ist durch eine nahezu kon-stante Energiezufuhr durch die Feuerung in der Anlage 34 gegeben. Die Brauchwassertemperatur wird unabhängig von der Kaltwassertemperatur mit dem Dreiwegeventil 19 im we-sentlichen konstant gehalten.Apart from the heating phase of the device, a constant heat output is transmitted in the heat exchanger 13 as soon as the domestic water pump 21 and the hot water pump 37 convey it through it, since on the one hand the volume flows and the temperatures in the domestic and hot water branch are largely constant . The temperature in the hot water branch is given by an almost constant supply of energy from the furnace in system 34. The dhw temperature is kept essentially constant regardless of the cold water temperature with the three-way valve 19.

Claims (8)

  1. Process for producing usable warm water that can be stored in a buffer store (1), in which process a current of usable water, flowing with constant velocity through a heat exchanger (13), is heated, characterised in that
    the usable water temperature is held constant at a standard tolerance, in which
    a first usable water partial current is conveyed through the buffer store (1) and a second usable water partial current is conveyed through a by-pass (17) bridging the buffer store (1), said currents being partial currents of the usable water current, wherein their mass flow ratio, as a function of the variation in the actual temperature of the usable water current flowing through the heat exchanger, is regulated continually according to a given theoretical temperature,
    so that a heating installation (34) which supplies hot water to the heat exchanger (13) has heating times that are as long as possible, while at the same time an intermittent hunting procedure is avoided.
  2. Process according to Claim 1, characterised in that
    the actual temperature of the usable water current after it leaves the heat exchanger (13) is recorded prior to the regulated branching of the partial currents.
  3. Apparatus for carrying out the process according to Claim 1 or 2 with a heating installation (34) for hot water,
    a heat exchanger (13),
    in which the hot water heats a usable water current,
    a buffer store (1) for the warm usable water, a by-pass (17) bridging the buffer store (1),
    a temperature-measuring element (23) for determining the actual temperature of the usable water heated in the heat exchanger (13) and
    a flow control device (19),
    by means of which heated water can be conveyed through a buffer store or
    through the by-pass (17) according to the usable water temperature recorded by the temperature-measuring element (23), characterised in that
    the flow control device (19), in order to produce a continually variable mass flow ratio of a first and second usable water partial current constituting partial currents of the total usable water current through the buffer store (1) and the by-pass (17), can be adjusted by a control member (29) governable by a regulating device (25) according to the actual temperature measured by the temperature-measuring unit (23) connected to the regulating device (25), such that
    an actual temperature can be obtained from the mixture of the cold first and second mass current flows of the usable water current downstream of the buffer store (1), said flows being heated in the heat exchanger (13), which temperature
    varies only within a tolerance amount from a theoretical temperature stored in the regulating unit (25).
  4. Apparatus according to Claim, characterised in that
    the regulating device (25) is connected to a second temperature-measuring device (31) in the upper portion and
    to a third temperature-measuring device (32) in the lower portion of the buffer store (1), as well as
    to the heating installation (34), wherein
    the heating installation (34) can be controlled by the regulating device (25) such that
    heating of the hot water then takes place when
    the usable water temperature measured by the second temperature-measuring device (31) falls below a lower threshold temperature, and
    is halted when
    the usable water temperature measured by the third temperature-measuring device (32) exceeds an upper threshold temperature.
  5. Apparatus according to Claim 3 or 4, characterised in that
    the flow control device (19) is designed as a three-way valve, of which
    two connections are disposed in a supply conduit or a discharge conduit (11, 15) of the heat exchanger (13) and
    the third connection is connected to one end of the by-pass conduit (17), of which
    the other end communicates with the discharge or supply conduit (15, 11).
  6. Apparatus according to one of Claims 3 to 5, characterised in that
    a differential pressure-measuring device (42) parallel to the heat exchanger (13) is connected to the regulating device (25), which regulating device
    sends out a signal or an alarm (45) when the heat exchanger (13) exceeds a given drop in pressure.
  7. Apparatus according to one of Claims 3 to 6, characterised in that
    a fourth temperature-measuring device (49, 50) is mounted in a flow and return conduit (35, 36) of the heating installation (34), said conduit being connected to the heat exchanger (13), and a hot-water flow-meter (51) is disposed in one branch of the conduit (35, 36), in order to
    determine the quantity of heat consumed in the heat exchanger (13).
  8. Apparatus according to one of Claims 3 to 7, characterised in comprising
    a compact modular unit, transportable as a whole and designed as a finished component, with the buffer store (1), the heat exchanger (13), the first temperature-measuring device (23), the flow control device (19), the control member (29) and the regulating device (25), and also a first pump (21) for the usable water partial flows, a second pump (37) for the hot water, connections (55a, 55b) for the flow and return of the hot water, for a cold water supply (7) and for the usable warm water conduit (9), and an electrical supply terminal (54) for the regulating device (25), the temperature-measuring device (23, 31, 32, 49, 50) and the control member (29), wherein
    the regulating device (25), the temperature-measuring device (23, 31, 32, 49, 50), and the control member (29) are interconnected electrically and
    the buffer store (1), the heat exchanger (13), the temperature-measuring device (23, 31, 32, 49, 50), the flow control device (19), the first and second pumps (21, 37), and the connections (55a, 55b) for the flow and return of the hot water, for the cold water supply (7), and for the usable warm water conduit (9) are connected hydraulically and operationally.
EP91810233A 1990-04-02 1991-03-28 Installation for producing sanitary hot water and method of working the installation Expired - Lifetime EP0452259B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT9191810233T ATE105626T1 (en) 1990-04-02 1991-03-28 DEVICE FOR GENERATION OF DOMESTIC HOT WATER AND METHOD OF OPERATION OF THE DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH108290 1990-04-02
CH1082/90 1990-04-02

Publications (3)

Publication Number Publication Date
EP0452259A2 EP0452259A2 (en) 1991-10-16
EP0452259A3 EP0452259A3 (en) 1991-10-23
EP0452259B1 true EP0452259B1 (en) 1994-05-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810233A Expired - Lifetime EP0452259B1 (en) 1990-04-02 1991-03-28 Installation for producing sanitary hot water and method of working the installation

Country Status (3)

Country Link
EP (1) EP0452259B1 (en)
AT (1) ATE105626T1 (en)
DE (1) DE59101593D1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19624551C2 (en) * 1996-06-20 2002-02-28 Baelz Gmbh Helmut Process and device for heating domestic water

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3238285A1 (en) * 1982-10-15 1984-04-19 Max 8491 Katzelsried Bindl Jun. System for supplying heat energy from an external heat circuit to a service water circuit, in particular a service water storage tank
DE8812836U1 (en) * 1988-10-13 1990-02-08 Viessmann Werke GmbH & Co, 3559 Allendorf Additional heat exchanger
FR2647537B1 (en) * 1989-05-29 1995-04-14 Chaffoteaux Et Maury IMPROVEMENTS ON HOT WATER BALLOONS AND FACILITIES EQUIPPED WITH SUCH BALLOONS

Also Published As

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EP0452259A2 (en) 1991-10-16
DE59101593D1 (en) 1994-06-16
EP0452259A3 (en) 1991-10-23
ATE105626T1 (en) 1994-05-15

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