EP2193313A1 - Safety heat exchanger for combining a heat pump with a device of a public drinking water supply facility - Google Patents

Safety heat exchanger for combining a heat pump with a device of a public drinking water supply facility

Info

Publication number
EP2193313A1
EP2193313A1 EP08801224A EP08801224A EP2193313A1 EP 2193313 A1 EP2193313 A1 EP 2193313A1 EP 08801224 A EP08801224 A EP 08801224A EP 08801224 A EP08801224 A EP 08801224A EP 2193313 A1 EP2193313 A1 EP 2193313A1
Authority
EP
European Patent Office
Prior art keywords
circuit
safety
drinking water
heat exchanger
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08801224A
Other languages
German (de)
French (fr)
Other versions
EP2193313B1 (en
Inventor
Detlef Bull
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.)
Veolia Eau Compagnie Generale des Eaux SCA
Original Assignee
Oewa Wasser und Abwasser GmbH
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Filing date
Publication date
Application filed by Oewa Wasser und Abwasser GmbH filed Critical Oewa Wasser und Abwasser GmbH
Publication of EP2193313A1 publication Critical patent/EP2193313A1/en
Application granted granted Critical
Publication of EP2193313B1 publication Critical patent/EP2193313B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps

Definitions

  • Safety heat exchanger for the combination of a heat pump with a device of a public drinking water supply system
  • the invention relates to a safety heat exchanger for the combination of a heat pump with a device of a drinking water supply system having a primary circuit with drinking water, a secondary safety circuit with a health-endangering substance as antifreeze and a tertiary cycle with a refrigerant.
  • DE 2930484 Al It has also been proposed in DE 2930484 Al the use of a heat pump in a drinking water system.
  • the heat exchangers are integrated into a drinking water pipe by means of connecting pieces. To ensure the constant supply of heat in the main water pipe, this should be laid in a ring.
  • a circulation pump With a circulation pump, a circulation of the drinking water in the annular laid main supply line should be made possible.
  • the circulation pump is regulated depending on the temperature of the drinking water.
  • DE 2926578 Al relates to a safety heat exchanger for heating drinking water, which is to be separated from the refrigerant circuit. The direct warming of the drinking water should be avoided, since in this case the refrigerant and the drinking water are separated only by a single wall. This is not compatible with the demands for increased safety in drinking water supply.
  • At least one heat pipe is provided for heat transfer, whose end located outside the liquid container is arranged in a refrigerant container through which the refrigerant flows.
  • the coolant tank is connected via a double wall with the liquid container.
  • the double wall is interspersed by the heat pipe.
  • the intermediate circuit is formed by the heat pipes.
  • the heat pipes are either evacuated or filled with water.
  • the heat pipes can be filled with ethanol. In this way, the heat pipe has a neutral or harmless filling compared to the drinking water.
  • the heat pump described in DE 102004061441 B4 has an intermediate circuit, which does not primarily serve to protect the drinking water. Rather, the primary circuit to protect the groundwater is filled with drinking water.
  • the intermediate circuit serves to protect the freeze-down and is therefore filled with brine or a water glycol mixture that does not meet the requirements of the Drinking Water Ordinance is harmless.
  • the DE 102004061441 B4 thus relates exclusively to a heat exchanger system with a ground collector with a drinking water filling, the heat exchanger is usually secured against freezing.
  • the safety heat exchanger is therefore regulated by the temperature. It is a return line is provided, which is opened with a thermostatic valve when the allowable cooling temperature is reached.
  • a circulation device is provided for the intermediate circuit. The flow rate in the intermediate circuit is chosen so large that freezing is practically impossible.
  • the invention aims a safety heat exchanger for the combination of a heat pump with a device of a public drinking water supply having a primary circuit with drinking water, a safety circuit with a health-endangering substance and a tertiary circuit with a refrigerant.
  • a safety heat exchanger any impairment of drinking water in the public drinking water supply should be avoided.
  • the purpose of the safety heat exchanger is to prevent impairment of the quality of the drinking water in accordance with the Drinking Water Ordinance and to protect human health from the adverse effects of contamination. When obtaining heat from drinking water intended for human consumption, the health and purity of the drinking water must not be impaired.
  • the object is achieved with a safety heat exchanger, which is characterized in that the primary circuit has a connected to a drinking water supply inlet and a drain with electrically controllable solenoid valves, wherein the primary circuit or the refrigerant circuit has a relation to the safety circuit higher operating pressure and the safety circuit with a Pressure monitor is provided, the control technology is connected to the solenoid valves such that is closed at a pressure drop in the primary circuit or in the refrigerant circuit, the inlet and the drain of the drinking water to the drinking water system.
  • the safety heat exchanger comprises a circulation pump for the drinking water in the primary circuit, a feed pump for the antifreeze in the intermediate circuit and a compressor in the refrigerant circuit, which are also control technology connected to the pressure switch and at pressure loss in the primary circuit or in the refrigerant circuit at a standstill.
  • a warning signal can be generated by the pressure monitor.
  • Safety circuit has higher operating pressure and Figure 2 shows a safety heat exchanger with a primary circuit, compared to the
  • Safety circuit has a lower operating pressure.
  • Figure 1 shows a safety heat exchanger for the combination of a heat pump with a device of a drinking water supply system, which is embodied in the first embodiment by a waterworks 1.
  • the device of the drinking water supply system is represented by a drinking water tank 2.
  • the invention should not be limited.
  • Facilities and Systems of drinking water supply systems may include, for example, parts of the drinking water supply system, pump stations, booster stations or drinking water supply networks.
  • the establishment of the drinking water supply system is a waterworks 1, in which mainly for self-consumption and energy savings with a safety heat exchanger in combination with a heat pump existing in the drinking water geothermal energy to be compared to the heat of the drinking water higher temperature level to be transformed.
  • the safety heat exchanger comprises an inlet 3 to a primary circuit 4 and a leading to the waterworks 1 sequence 5 for containing the geothermal drinking water, which is located at a substantially constant temperature level.
  • the primary circuit 4 is thermally connected to a secondary safety circuit 6 or intermediate circuit that contains a health-endangering substance as antifreeze, so that the safety circuit 6 can not freeze when heat is removed.
  • the intermediate circuit is preferably filled with a mixture consisting of 90 percent water and 10 percent ethanol.
  • the safety circuit 6 is connected to a tertiary refrigerant circuit 7 provided with a conventional refrigerant.
  • the refrigerant is transported with a compressor 8 in a known manner to a non-illustrated condenser and an evaporator with an expansion valve, which are joined together via a pipe system to the refrigerant circuit 7.
  • a pressure monitor with a differential pressure switch 9 is provided in the safety circuit 6. Furthermore, the pressure monitor comprises various components of a safety module, in particular via an expansion vessel 11 5 has a safety valve 12 and a pressure gauge 13. With the safety module, the pressure in the safety circuit 6 can be kept substantially constant.
  • the differential pressure switch 9 is control technology connected to the circulation pump 14 for the drinking water in the primary circuit 4, the feed pump 15 for the antifreeze in the safety circuit 6 and the compressor 8 in the refrigerant circuit 7.
  • In the primary circuit 4 are also each in the inlet 3 to the circulation pump 14 and in the drain 5 for the drinking servo-controlled solenoid valves 16 arranged with which the inlet and outlet 5 can be closed even in the event of power failure.
  • the solenoid valves 16 are connected in parallel with the differential pressure switch 9, so that upon actuation of the differential pressure switch 9, the solenoid valves 16 are closed and the circulating pump 14 and feed pump 15 and the compressor 8 are stopped.
  • the primary circuit 4 can be additionally equipped with thermometers 17.
  • a parallel-connected pressure switch 18 is provided in the refrigerant circuit 7 for further security.
  • the pressure conditions are set such that the primary circuit 4 is basically operated with the drinking water circuit with a higher pressure than in the safety circuit 6. If the pressure in the primary circuit 4, for example, at least 4 bar, the safety circuit 6 is set to a pressure less than or equal to 2 bar. The pressure in the refrigerant circuit 7 is set to a much higher pressure of approximately 20 bar. In the case of, for example, evaporator leakage, the pressure in the safety circuit 6 increases. As a result, the differential pressure switch 9 in the exemplary embodiment responds at a pressure Pmax of 3 bar of the safety circuit 6. The pressure switch 18 responds at a pressure Pmin of 20 bar of the refrigerant circuit 7.
  • the differential pressure switch 9 reacts at a pressure of Pmax above 3 bar.
  • the fault signal is switched to a safety circuit of the heat pump controller and the system is thus automatically shut down.
  • a signal generator can be provided which emits, for example, an acoustic, optical, mechanical or electrical warning signal. If required, the electrical warning signal can also be transmitted to a remote monitoring center to the waterworks 1. Likewise A fault message about the heat pump's accident is triggered via SMS on a standby mobile phone.
  • the pressure conditions are set such that the primary circuit 4 is basically operated with the drinking water circuit with the lowest pressure of the entire system.
  • the embodiment is particularly useful when the drinking water pressure-free, for example, in a drinking water tank 2 is applied.
  • the switching point of the pressure switch 18 in the refrigerant circuit 7 is in this case at a pressure Pmin of 20 bar.
  • the differential pressure switch 9 is at a pressure Pmax of 3 bar of the safety circuit 6 and triggers the shutdown of the circulation pump 14 and the feed pump 15 and the compressor 8.
  • the automatic decommissioning of the safety heat exchanger due to the pressure drop in the intermediate circuit. In this case also reacts the differential pressure switch 9 at a pressure Pmin of 1.5 bar.
  • each circuit of the heat transfer to increase the safety of flow control switch 19 have that react when falling below the volume flow below a value of 15 l / min with the shutdown of all pumps and the compressor 8.
  • the flow control switch has, for example, a switching point of 15 liters per minute.

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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)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

The invention relates to a safety heat exchanger for combining a heat pump with a device of a drinking water supply facility, said heat exchanger having a primary circuit (4) containing drinking water, a secondary safety circuit (6) containing a substance not hazardous to people's health as an antifreeze, and a tertiary circuit (7) containing a coolant. The safety heat exchanger is intended to prevent an impairment of the drinking water in the public drinking water supply. The safety heat exchanger comprises a primary circuit (4) having a feed pipe (3) connected to the drinking water supply facility and a discharge pipe (5) having electrically controllable solenoid valves (16). The primary circuit (4), or the coolant circuit (7), has a higher pressure than the safety circuit (6). The safety circuit (6) is provided with a pressure control device, which in terms of a control system is connected to the solenoid valves (16) such that the feed pipe (3) and the discharge pipe (5) of the drinking water to the drinking water facility are closed in the event of a pressure loss in the primary circuit (4) or in the coolant circuit (7).

Description

Sicherheitswärcnetauscher für die Kombination einer Wärmepumpe mit einer Einrichtung einer öffentlichen Trinkwasserversorgungsanlage Safety heat exchanger for the combination of a heat pump with a device of a public drinking water supply system
Die Erfindung betrifft einen Sicherheitswärmetauscher für die Kombination einer Wärmepumpe mit einer Einrichtung einer Trinkwasserversorgungsanlage, der einen Primärkreislauf mit Trinkwasser, einen sekundären Sicherheitskreislauf mit einem die Gesundheit nicht gefährdenden Stoff als Frostschutzmittel und einen Tertiärkreislauf mit einem Kältemittel aufweist.The invention relates to a safety heat exchanger for the combination of a heat pump with a device of a drinking water supply system having a primary circuit with drinking water, a secondary safety circuit with a health-endangering substance as antifreeze and a tertiary cycle with a refrigerant.
In der DE 102004061441 B4 ist ein Wärmetauscher beschrieben, der in einem Trinkwasserschutzgebiet eingesetzt werden soll. Es wird ein dritter Zwischenkreislauf aus Sicherheitsgründen vorgeschlagen, um den Primärkreislauf mit Trinkwasser betreiben zu können, was dem Schutz des Trinkwassers in Trinkwasserschutzgebieten dienen soll.In DE 102004061441 B4 a heat exchanger is described, which is to be used in a drinking water protection area. It is proposed a third intermediate circuit for safety reasons to operate the primary circuit with drinking water, which is to serve the protection of drinking water in drinking water protection areas.
In der DE 2834442 Al wurde bereits eine Kombination einer Trinkwasserversorgungsanlage mit einem Wärmetauscher zur Gewinnung von Wärme vorgeschlagen. Zur Gewinnung von Haushaltswärme nach dem Wärmepumpensystem soll aus dem Rohrleitungsnetz einer zentralen Wasserversorgung eine Wasserteilmenge entnommen werden, der mit einem Wärmetauscher Wärmeenergie entzogen wird. Vorsorglich soll ein Wasserspeicher zwischen der Wärmepumpe und dem Wärmetauscher der aus dem Rohrleitungsnetz entnommenen Wasserteilmenge vorgesehen werden. Der Speicher soll eine zeitlich begrenzte Unabhängigkeit der Wärmegewinnung während der Nachtstunden gewährleisten, wenn mit einer sehr geringen Strömungsgeschwindigkeit innerhalb der Rohrleitungen der zentralen Wasserversorgung gerechnet werden muss. Durch den Zwischenspeicher ist nicht gewährleistet, dass im Fall einer Leckage kein Kältemittel mit dem Trinkwasser in Verbindung tritt.In DE 2834442 Al, a combination of a drinking water supply system with a heat exchanger for recovering heat has already been proposed. To obtain household heat after the heat pump system is to be removed from the piping network of a central water supply a water partial amount, which is withdrawn heat energy with a heat exchanger. As a precaution, a water reservoir is to be provided between the heat pump and the heat exchanger of the water subset taken from the pipeline network. The storage is to ensure a temporary independence of heat generation during the night hours, if it must be reckoned with a very low flow rate within the piping of the central water supply. The buffer does not guarantee that in the event of a leak, no refrigerant will come into contact with the drinking water.
Ebenso wurde in der DE 2930484 Al der Einsatz einer Wärmepumpe in einer Trinkwasseranlage vorgeschlagen. Die Wärmetauscher sind mittels Anschlussstutzen in eine Trinkwasserleitung integriert. Um die ständige Wärmezufuhr in der Hauptwasserleitung zu gewährleisten, soll diese ringförmig verlegt werden. Mit einer Umwälzpumpe soll eine Zirkulation des Trinkwassers in der ringförmig verlegten Hauptversorgungsleitung ermöglicht werden. Die Umwälzpumpe wird in Abhängigkeit der Temperatur des Trinkwassers geregelt. Die DE 2926578 Al betrifft einen Sicherheitswärmetauscher zur Erwärmung von Trinkwasser, das von dem Kältemittelkreislauf getrennt werden soll. Die direkte Erwärmung des Trinkwassers soll vermieden werden, da hierbei das Kältemittel und das Trinkwasser nur durch eine einzige Wand getrennt sind. Dies verträgt sich nicht mit den Forderungen nach einer erhöhten Sicherheit bei der Trinkwasserversorgung.It has also been proposed in DE 2930484 Al the use of a heat pump in a drinking water system. The heat exchangers are integrated into a drinking water pipe by means of connecting pieces. To ensure the constant supply of heat in the main water pipe, this should be laid in a ring. With a circulation pump, a circulation of the drinking water in the annular laid main supply line should be made possible. The circulation pump is regulated depending on the temperature of the drinking water. DE 2926578 Al relates to a safety heat exchanger for heating drinking water, which is to be separated from the refrigerant circuit. The direct warming of the drinking water should be avoided, since in this case the refrigerant and the drinking water are separated only by a single wall. This is not compatible with the demands for increased safety in drinking water supply.
In der DE 2926578 Al ist zur Wärmeübertragung mindestens ein Wärmerohr vorgesehen, dessen außerhalb des Flüssigkeitsbehälters befindliches Ende in einem vom Kältemittel durchströmten Kältemittelbehälter angeordnet ist. Der Kühlmittelbehälter ist über eine Doppelwand mit dem Flüssigkeitsbehälter verbunden. Die Doppelwand ist von dem Wärmerohr durchsetzt. Diese Anordnung bildet einen Sicherheitswärmeübertrager, welcher die Trennung des Kältemittels von dem Trinkwasser sicherstellt und ein Übertreten von Kältemittel in die Flüssigkeit verhindert. Die Überwachung der Sicherheitsanordnung soll bei einer Leckage indirekt über eine Leistungsminderung anzeigt werden.In DE 2926578 Al, at least one heat pipe is provided for heat transfer, whose end located outside the liquid container is arranged in a refrigerant container through which the refrigerant flows. The coolant tank is connected via a double wall with the liquid container. The double wall is interspersed by the heat pipe. This arrangement forms a safety heat exchanger, which ensures the separation of the refrigerant from the drinking water and prevents the passage of refrigerant into the liquid. The monitoring of the safety arrangement should be displayed indirectly in case of leakage via a reduction in performance.
Durch den in sich geschlossenen Wärmerohrkreislauf ist zwischen dem Kältemittel und dem Trinkwasser ein extrem gut leitender Zwischenkreislauf geschaltet. Der Zwischenkreislauf wird durch die Wärmerohre gebildet. Die Wärmerohre sind entweder evakuiert oder mit Wasser gefüllt. Andererseits können die Wärmerohre mit Ethanol gefüllt werden. Auf diese Weise weist das Wärmerohr eine gegenüber dem Trinkwasser neutrale beziehungsweise ungefährliche Füllung auf.Due to the self-contained heat pipe circuit, an extremely good conductive intermediate circuit is connected between the refrigerant and the drinking water. The intermediate circuit is formed by the heat pipes. The heat pipes are either evacuated or filled with water. On the other hand, the heat pipes can be filled with ethanol. In this way, the heat pipe has a neutral or harmless filling compared to the drinking water.
Dem Fachmann ist daher bei Einsatz einer Wärmepumpe zum Schutz des Trinkwassers ein Zwischenkreislauf nahegelegt, der mit Trinkwasser oder mit ungefährlichen Alkoholen gefüllt ist. Damit allein können jedoch die Vorschriften über den Schutz des Trinkwassers nicht vollständig erfüllt werden, weil bei einer Leckage des Kältemittelkreislaufs und des Zwischenkreislaufs unbemerkt Kältemittel in das Trinkwasser übertreten kann.The expert is therefore when using a heat pump for the protection of drinking water an intermediate circuit suggested that is filled with drinking water or harmless alcohols. However, alone can the regulations on the protection of drinking water can not be fully met, because in case of leakage of the refrigerant circuit and the intermediate circuit unnoticed refrigerant can enter the drinking water.
Schließlich weist die in der DE 102004061441 B4 beschriebene Wärmepumpe einen Zwischenkreislauf auf, der nicht in erster Linie dem Schutz des Trinkwassers dient. Vielmehr ist der Primärkreislauf zum Schutz des Grundwassers mit Trinkwasser gefüllt. Der Zwischenkreislauf dient dem Schutz des Herunterfrierens und ist demzufolge mit Sole oder einem Wasser Glykol Gemisch gefüllt, das im Sinne der Trinkwasserverordnung nicht unbedenklich ist. Die DE 102004061441 B4 bezieht sich somit ausschließlich auf eine Wärmetauscheranlage mit einem Erdkollektor mit einer Trinkwasserfüllung, wobei der Wärmetauscher üblicherweise gegen Einfrieren gesichert ist. Der Sicherheitswärmetauscher wird aus diesem Grund über die Temperatur geregelt. Es ist eine Rücklaufleitung vorgesehen, die mit einem Thermostatventil geöffnet wird, wenn die zulässige Abkühlungstemperatur erreicht wird. Außerdem wird für den Zwischenkreislauf eine Umwälzeinrichtung vorgesehen. Die Durchflussrate in dem Zwischenkreislauf wird derart groß gewählt, dass ein Einfrieren praktisch nicht möglich ist.Finally, the heat pump described in DE 102004061441 B4 has an intermediate circuit, which does not primarily serve to protect the drinking water. Rather, the primary circuit to protect the groundwater is filled with drinking water. The intermediate circuit serves to protect the freeze-down and is therefore filled with brine or a water glycol mixture that does not meet the requirements of the Drinking Water Ordinance is harmless. The DE 102004061441 B4 thus relates exclusively to a heat exchanger system with a ground collector with a drinking water filling, the heat exchanger is usually secured against freezing. The safety heat exchanger is therefore regulated by the temperature. It is a return line is provided, which is opened with a thermostatic valve when the allowable cooling temperature is reached. In addition, a circulation device is provided for the intermediate circuit. The flow rate in the intermediate circuit is chosen so large that freezing is practically impossible.
Aus diesem Grunde ist eine vollständige Sicherheit für den Schutz des Trinkwassers tatsächlich nicht gegeben, weil der Trinkwasserkreislauf direkt mit dem Wasser - Glykol - Zwischenkreislauf in Kontakt steht. Bei einer Leckage des Zwischenkreislaufs und des Primärkreislaufs kann das Wasser - Glykol - Gemisch in das Trinkwasser übertreten. Glykol zählt gleichwohl im Sinne der Trinkwasserversorgung zu den die Gesundheit gefährdenden Stoffen. Folglich ist der Wärmetauscher für die Kombination einer Wärmepumpe mit einer Einrichtung einer öffentlichen Trinkwasserversorgung nicht geeignet.For this reason, a complete safety for the protection of the drinking water is actually not given, because the drinking water circuit is directly in contact with the water - glycol - intermediate circuit. If there is a leakage between the intermediate circuit and the primary circuit, the water - glycol mixture can pass into the drinking water. Nevertheless, glycol is one of the health-endangering substances in terms of drinking water supply. Consequently, the heat exchanger for the combination of a heat pump with a device of public drinking water supply is not suitable.
Die Erfindung bezweckt einen Sicherheitswärmetauscher für die Kombination einer Wärmepumpe mit einer Einrichtung einer öffentlichen Trinkwasserversorgung, der einen Primärkreislauf mit Trinkwasser, einen Sicherheitskreislauf mit einem die Gesundheit nicht gefährdenden Stoff und einen Tertiärkreislauf mit einem Kältemittel aufweist. Mit dem Sicherheitswärmetauscher soll jede Beeinträchtigung des Trinkwassers in der öffentlichen Trinkwasserversorgung vermieden werden. Durch den Sicherheitswärmetauscher soll eine Beeinträchtigung der Beschaffenheit des Trinkwassers entsprechend der Trinkwasserverordnung verhindert und die menschliche Gesundheit vor den nachteiligen Einflüssen einer Verunreinigung geschützt werden. Bei der Gewinnung von Wärme aus dem Trinkwasser, das für den menschlichen Gebrauch bestimmt ist, darf die Genusstauglichkeit und Reinheit des Trinkwassers nicht beeinträchtigt werden.The invention aims a safety heat exchanger for the combination of a heat pump with a device of a public drinking water supply having a primary circuit with drinking water, a safety circuit with a health-endangering substance and a tertiary circuit with a refrigerant. With the safety heat exchanger, any impairment of drinking water in the public drinking water supply should be avoided. The purpose of the safety heat exchanger is to prevent impairment of the quality of the drinking water in accordance with the Drinking Water Ordinance and to protect human health from the adverse effects of contamination. When obtaining heat from drinking water intended for human consumption, the health and purity of the drinking water must not be impaired.
Erfindungsgemäß wird die Aufgabe mit einem Sicherheitswärmetauscher gelöst, der dadurch gekennzeichnet ist, dass der Primärkreislauf einen mit einer Trinkwasserversorgungsanlage verbundenen Zulauf und einen Ablauf mit elektrisch steuerbaren Magnetventilen aufweist, wobei der Primärkreislauf oder der Kältemittelkreislauf einen gegenüber dem Sicherheitskreislauf höheren Betriebsdruck aufweist und der Sicherheitskreislauf mit einem Druckwächter versehen ist, der steuerungstechnisch mit den Magnetventilen derart verbunden ist, dass bei einem Druckverlust im Primärkreislauf oder im Kältemittelkreislauf der Zulauf und der Ablauf des Trinkwasser zur Trinkwasseranlage verschlossen ist.According to the invention the object is achieved with a safety heat exchanger, which is characterized in that the primary circuit has a connected to a drinking water supply inlet and a drain with electrically controllable solenoid valves, wherein the primary circuit or the refrigerant circuit has a relation to the safety circuit higher operating pressure and the safety circuit with a Pressure monitor is provided, the control technology is connected to the solenoid valves such that is closed at a pressure drop in the primary circuit or in the refrigerant circuit, the inlet and the drain of the drinking water to the drinking water system.
Nach einer Weiterentwicklung der Erfindung umfasst der Sicherheitswärmetauscher eine Umwälzpumpe für das Trinkwasser im Primärkreislauf, eine Förderpumpe für das Frostschutzmittel im Zwischenkreislauf sowie einen Verdichter im Kältemittelkreislauf, die desgleichen steuerungstechnisch mit dem Druckwächter verbunden und bei Druckverlust im Primärkreislauf oder im Kältemittelkreislauf im Stillstand sind. Außerdem kann durch den Druckwächter ein Warnsignal erzeugt werden.According to a further development of the invention, the safety heat exchanger comprises a circulation pump for the drinking water in the primary circuit, a feed pump for the antifreeze in the intermediate circuit and a compressor in the refrigerant circuit, which are also control technology connected to the pressure switch and at pressure loss in the primary circuit or in the refrigerant circuit at a standstill. In addition, a warning signal can be generated by the pressure monitor.
Auf diese Weise kann sicher und zuverlässig eine Beeinträchtigung des Trinkwassers durch Frostschutzmittel oder Kältemittel vermieden werden. Wenn zwischen dem Primärkreislauf oder dem Kältemittel ein Leck auftritt, äußert sich dass durch einen Überdruck im Zwischenkreislauf, der mit Hilfe des Druckwächters überwacht wird. Bei einem bestimmten, von einem Kontrolldruck abweichenden Überdruck oder Unterdruck werden die Pumpen in allen Kreisläufen abgeschaltet und der Zulauf und Ablauf des Trinkwassers zur Trinkwasserversorgungsanlage durch die Magnetventile geschlossen, was nachfolgend anhand von zwei Ausführungsbeispielen beschrieben werden soll.In this way, an impairment of the drinking water can be safely and reliably avoided by antifreeze or refrigerant. If a leak occurs between the primary circuit or the refrigerant, this is indicated by an overpressure in the intermediate circuit, which is monitored by means of the pressure monitor. At a certain, deviating from a control pressure or negative pressure, the pumps are switched off in all circuits and the inlet and outlet of the drinking water to the drinking water supply system closed by the solenoid valves, which will be described below with reference to two embodiments.
Die Ausführungsbeispiele sollen nachfolgend unter Bezugnahme auf die Zeichnungen näher erläutert werden. Vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen. Im Einzelnen zeigt in rein schematischer DarstellungThe embodiments will be explained in more detail with reference to the drawings. Advantageous embodiments of the invention will become apparent from the dependent claims. In detail shows in a purely schematic representation
Figur 1 einen Sicherheitswärmetauscher mit einem Primärkreislauf, der einen gegenüber dem1 shows a safety heat exchanger with a primary circuit, the one opposite to the
Sicherheitskreislauf höheren Betriebsdruck aufweist und Figur 2 einen Sicherheitswärmetauscher mit einem Primärkreislauf, der gegenüber demSafety circuit has higher operating pressure and Figure 2 shows a safety heat exchanger with a primary circuit, compared to the
Sicherheitskreislauf einen geringeren Betriebsdruck aufweist.Safety circuit has a lower operating pressure.
Figur 1 zeigt einen Sicherheitswärmetauscher für die Kombination einer Wärmepumpe mit einer Einrichtung einer Trinkwasserversorgungsanlage, die in dem ersten Ausführungsbeispiel durch ein Wasserwerk 1 verkörpert ist. In dem zweiten Ausführungsbeispiel nach Figur 2 wird die Einrichtung der Trinkwasserversorgungsanlage durch einen Trinkwasserbehälter 2 dargestellt. Auf diese Anlagen soll die Erfindung nicht beschränkt werden. Einrichtungen und Anlagen von Trinkwasserversorgungsanlagen können beispielsweise Anlagenteile der Trinkwasserförderung, Pumpstationen, Druckerhöhungsstationen oder Trinkwasserversorgungsnetze umfassen.Figure 1 shows a safety heat exchanger for the combination of a heat pump with a device of a drinking water supply system, which is embodied in the first embodiment by a waterworks 1. In the second embodiment of Figure 2, the device of the drinking water supply system is represented by a drinking water tank 2. In these systems, the invention should not be limited. Facilities and Systems of drinking water supply systems may include, for example, parts of the drinking water supply system, pump stations, booster stations or drinking water supply networks.
In Figur 1 ist die Einrichtung der Trinkwasserversorgungsanlage ein Wasserwerk 1, in dem vorwiegend für den Eigenverbrauch und zur Einsparung von Energie mit einem Sicherheitswärmetauscher in Kombination mit einer Wärmepumpe die in dem Trinkwasser vorhandene Erdwärme auf ein gegenüber der Wärme des Trinkwassers höheres Temperaturniveau transformiert werden soll.In Figure 1, the establishment of the drinking water supply system is a waterworks 1, in which mainly for self-consumption and energy savings with a safety heat exchanger in combination with a heat pump existing in the drinking water geothermal energy to be compared to the heat of the drinking water higher temperature level to be transformed.
Der Sicherheitswärmetauscher umfasst einen Zulauf 3 zu einem Primärkreislauf 4 und einen zu dem Wasserwerk 1 führenden Ablauf 5 für das die Erdwärme enthaltende Trinkwasser, das sich auf einem im Wesentlichen konstanten Temperaturniveau befindet. Der Primärkreislauf 4 ist wärmetechnisch mit einem sekundären Sicherheitskreislauf 6 oder Zwischenkreislauf verbunden, der einen die Gesundheit nicht gefährdenden Stoff als Frostschutzmittel enthält, damit der Sicherheitskreislauf 6 beim Entzug der Wärme nicht einfrieren kann. Der Zwischenkreislauf ist vorzugsweise mit einem Gemisch gefüllt, das zu 90 Prozent aus Wasser und zu 10 Prozent aus Ethanol besteht. Ferner ist der Sicherheitskreislauf 6 mit einem tertiären Kältemittelkreislauf 7 verbunden, der mit einem herkömmlichen Kältemittel versehen ist. Das Kältemittel wird mit einem Verdichter 8 in bekannter Weise zu einem nicht weiter dargestellten Kondensator und einem Verdampfer mit einem Expansionsventil transportiert, die über ein Rohrsystem zu dem Kältemittelkreislauf 7 zusammengeschlossen sind.The safety heat exchanger comprises an inlet 3 to a primary circuit 4 and a leading to the waterworks 1 sequence 5 for containing the geothermal drinking water, which is located at a substantially constant temperature level. The primary circuit 4 is thermally connected to a secondary safety circuit 6 or intermediate circuit that contains a health-endangering substance as antifreeze, so that the safety circuit 6 can not freeze when heat is removed. The intermediate circuit is preferably filled with a mixture consisting of 90 percent water and 10 percent ethanol. Further, the safety circuit 6 is connected to a tertiary refrigerant circuit 7 provided with a conventional refrigerant. The refrigerant is transported with a compressor 8 in a known manner to a non-illustrated condenser and an evaporator with an expansion valve, which are joined together via a pipe system to the refrigerant circuit 7.
Zur Überwachung der Funktionsweise des Sicherheitswärmetauschers ist in dem Sicherheitskreislauf 6 ein Druckwächter mit einem Differenzdruckwächter 9 vorgesehen. Ferner umfasst der Druckwächter verschiedene Komponenten einer Sicherheitsbaugruppe, die insbesondere über ein Ausdehnungsgefäß 115 ein Sicherheitsventil 12 und ein Manometer 13 verfugt. Mit der Sicherheitsbaugruppe kann der Druck in dem Sicherheitskreislauf 6 im Wesentlichen konstant gehalten werden. Der Differenzdruckwächter 9 ist steuerungstechnisch mit der Umwälzpumpe 14 für das Trinkwasser im Primärkreislauf 4, der Förderpumpe 15 für das Frostschutzmittel im Sicherheitskreislauf 6 sowie mit dem Verdichter 8 im Kältemittelkreislauf 7 verbunden. In dem Primärkreislauf 4 sind weiterhin jeweils in den Zulauf 3 zu der Umwälzpumpe 14 sowie in den Ablauf 5 für das Trinkwasser servogesteuerte Magnetventile 16 angeordnet, mit denen der Zu - und Ablauf 5 selbst bei Stromausfall geschlossen werden kann. Die Magnetventile 16 sind parallel mit dem Differenzdruckwächter 9 geschaltet, so dass beim Ansprechen des Differenzdruckwächters 9 die Magnetventile 16 geschlossen und die Umwälzpumpe 14 und Förderpumpe 15 sowie der Verdichter 8 stillgesetzt sind. Zur Erhöhung der Sicherheit kann der Primärkreislauf 4 zusätzlich mit Thermometern 17 ausgerüstet werden. Schließlich ist in dem Kältemittelkreislauf 7 zur weiteren Sicherheit ein parallel geschalteter Druckschalter 18 vorgesehen.To monitor the operation of the safety heat exchanger, a pressure monitor with a differential pressure switch 9 is provided in the safety circuit 6. Furthermore, the pressure monitor comprises various components of a safety module, in particular via an expansion vessel 11 5 has a safety valve 12 and a pressure gauge 13. With the safety module, the pressure in the safety circuit 6 can be kept substantially constant. The differential pressure switch 9 is control technology connected to the circulation pump 14 for the drinking water in the primary circuit 4, the feed pump 15 for the antifreeze in the safety circuit 6 and the compressor 8 in the refrigerant circuit 7. In the primary circuit 4 are also each in the inlet 3 to the circulation pump 14 and in the drain 5 for the drinking servo-controlled solenoid valves 16 arranged with which the inlet and outlet 5 can be closed even in the event of power failure. The solenoid valves 16 are connected in parallel with the differential pressure switch 9, so that upon actuation of the differential pressure switch 9, the solenoid valves 16 are closed and the circulating pump 14 and feed pump 15 and the compressor 8 are stopped. To increase safety, the primary circuit 4 can be additionally equipped with thermometers 17. Finally, a parallel-connected pressure switch 18 is provided in the refrigerant circuit 7 for further security.
Bei einem Sicherheitswärmetauscher nach Figur 1 sind die Druckverhältnisse derart festgelegt, dass der Primärkreislauf 4 mit dem Trinkwasserkreis grundsätzlich mit einem höheren Druck als im Sicherheitskreislauf 6 betrieben wird. Wenn der Druck im Primärkreislauf 4 beispielsweise mindestens 4 bar beträgt, wird der Sicherheitskreislauf 6 auf einen Druck kleiner oder gleich 2 bar eingestellt. Der Druck im Kältemittelkreislauf 7 wird auf einen wesentlich höheren Druck von cirka 20 bar eingestellt. Im Fall beispielsweise einer Verdampferleckage erhöht sich der Druck im Sicherheitskreislauf 6. Dadurch spricht der Differenzdruckwächter 9 im Ausfuhrungsbeispiel bei einen Druck Pmax von 3 bar des Sicherheitskreislaufs 6 an. Der Druckschalter 18 spricht bei einem Druck Pmin von 20 bar des Kältemittelkreislaufs 7 an. Durch eine mit dem Differenzdruckwächter 9 und dem Druckschalter 18 verbunden Steuerschaltung wird sofort der Sicherheitswärmetauscher abgeschaltet und das Schließen der Magnetventile 16 veranlasst. Aufgrand der Überwachung des Druckanstiegs im Zwischenkreislauf 6 und dem Abschalten der Umwälzpumpe 14 kann auf diese Weise in jedem Fall einer Havarie verhindert werden, dass Kältemittel in das Trinkwasser gelangen kann.In a safety heat exchanger according to Figure 1, the pressure conditions are set such that the primary circuit 4 is basically operated with the drinking water circuit with a higher pressure than in the safety circuit 6. If the pressure in the primary circuit 4, for example, at least 4 bar, the safety circuit 6 is set to a pressure less than or equal to 2 bar. The pressure in the refrigerant circuit 7 is set to a much higher pressure of approximately 20 bar. In the case of, for example, evaporator leakage, the pressure in the safety circuit 6 increases. As a result, the differential pressure switch 9 in the exemplary embodiment responds at a pressure Pmax of 3 bar of the safety circuit 6. The pressure switch 18 responds at a pressure Pmin of 20 bar of the refrigerant circuit 7. By a control circuit connected to the differential pressure switch 9 and the pressure switch 18, the safety heat exchanger is switched off immediately and causes the closing of the solenoid valves 16. Aufgrand the monitoring of the pressure increase in the intermediate circuit 6 and the switching off of the circulation pump 14 can be prevented in this way in any case of an accident that refrigerant can get into the drinking water.
Im Fall einer Wärmetauscherleckage im Primärkreislauf 4 erfolgt infolge des Druckanstiegs im Sicherheitskreislauf 6 ebenfalls das automatische Außerbetriebnehmen der Anlage. Hierbei reagiert ebenfalls der Differenzdruckwächter 9 bei einem Druck von Pmax über 3 bar. Das Störsignal wird auf einen Sicherheitskreis des Wärmepumpenreglers geschaltet und die Anlage wird damit automatisch außer Betrieb genommen. Für diesen Fall kann ein Signalgeber vorgesehen werden, der beispielsweise ein akustisches, optisches, mechanisches oder elektrisches Warnsignal abgibt. Das elektrische Warnsignal kann bei Bedarf auch an eine entfernte Überwachungszentrale an das Wasserwerk 1 übermittelt werden. Desgleichen kann eine Störungsmeldung über die Havarie der Wärmepumpe per SMS auf ein Bereitschaftshandy ausgelöst werden.In the case of a heat exchanger leakage in the primary circuit 4 takes place due to the pressure increase in the safety circuit 6 also the automatic decommissioning of the system. Here too, the differential pressure switch 9 reacts at a pressure of Pmax above 3 bar. The fault signal is switched to a safety circuit of the heat pump controller and the system is thus automatically shut down. In this case, a signal generator can be provided which emits, for example, an acoustic, optical, mechanical or electrical warning signal. If required, the electrical warning signal can also be transmitted to a remote monitoring center to the waterworks 1. Likewise A fault message about the heat pump's accident is triggered via SMS on a standby mobile phone.
Bei einem Sicherheitswärmetauscher nach Figur 2 sind die Druckverhältnisse derart festgelegt, dass der Primärkreislauf 4 mit dem Trinkwasserkreis grundsätzlich mit dem niedrigsten Druck des Gesamtsystems betrieben wird. Die Ausgestaltung ist dann besonders zweckmäßig, wenn das Trinkwasser druckfrei, beispielsweise bei einem Trinkwasserbehälter 2 anliegt. Der Schaltpunkt des Druckschalters 18 im Kältemittelkreislauf 7 liegt in diesem Fall bei einem Druck Pmin von 20 bar. Im Fall einer Verdampferleckage ist ein Druckanstieg im Sicherheitskreislauf 6 zu erwarten. Hierbei spricht der Differenzdruckwächter 9 bei einem Druck Pmax von 3 bar des Sicherheitskreislaufes 6 an und löst die Abschaltung der Umwälzpumpe 14 und der Förderpumpe 15 sowie des Verdichters 8 aus. Zeitgleich erfolgt das Schließen der Magnetventile 16 im Primärkreislauf 4. Im Fall einer Wärmetauscherleckage im Primärkreislauf 4 erfolgt ebenfalls die automatische Außerbetriebnahme des Sicherheitswärmetauschers infolge des Druckabfalls im Zwischenkreislauf. Hierbei reagiert ebenfalls der Differenzdruckwächter 9 bei einem Druck Pmin vom 1,5 bar.In a safety heat exchanger according to Figure 2, the pressure conditions are set such that the primary circuit 4 is basically operated with the drinking water circuit with the lowest pressure of the entire system. The embodiment is particularly useful when the drinking water pressure-free, for example, in a drinking water tank 2 is applied. The switching point of the pressure switch 18 in the refrigerant circuit 7 is in this case at a pressure Pmin of 20 bar. In the case of evaporator leakage, a pressure increase in the safety circuit 6 is to be expected. Here, the differential pressure switch 9 is at a pressure Pmax of 3 bar of the safety circuit 6 and triggers the shutdown of the circulation pump 14 and the feed pump 15 and the compressor 8. At the same time, the closing of the solenoid valves 16 in the primary circuit 4. In the case of a heat exchanger leakage in the primary circuit 4 also takes place, the automatic decommissioning of the safety heat exchanger due to the pressure drop in the intermediate circuit. In this case also reacts the differential pressure switch 9 at a pressure Pmin of 1.5 bar.
Zusätzlich kann jeder Kreislauf der Wärmeübertragung zur Erhöhung der Sicherheit über Strömungskontrollschalter 19 verfügen, welche bei Unterschreitung des Volumenstroms unterhalb eines Werts von 15 l/min mit dem Abschalten aller Pumpen und des Verdichters 8 reagieren. Der Strömungskontrollschalter hat beispielsweise einen Schaltpunkt von 15 Liter pro Minute.In addition, each circuit of the heat transfer to increase the safety of flow control switch 19 have that react when falling below the volume flow below a value of 15 l / min with the shutdown of all pumps and the compressor 8. The flow control switch has, for example, a switching point of 15 liters per minute.
Durch diese Ausgestaltung ist es möglich Leckagen schnell zu erkennen, so dass kurzfristig Abhilfe zu schaffen ist. Durch die Anordnung des Sicherheitskreislaufs 6 mit dem vorgeschlagnen Druckwächter bei einem Sicherheitswärmetauscher kann in jedem Havariefall eine Abschaltung der Wärmepumpe herbeigeführt werden, ohne dass eine Beeinträchtigung der Trinkwasserversorgung erfolgen kann. Der Einbau des Druckwächters ist auch bei analogen Anlagen ohne größeren Aufwand möglich. With this configuration, it is possible to detect leaks quickly, so that there is a short-term remedy. By arranging the safety circuit 6 with the proposed pressure switch in a safety heat exchanger, a shutdown of the heat pump can be brought in any accident, without affecting the drinking water supply can take place. The installation of the pressure switch is also possible with analog systems without much effort.

Claims

Patentansprüche claims
1. Sicherheitswärmetauscher für die Kombination einer Wärmepumpe mit einer Einrichtung einer Trinkwasserversorgungsanlage, der einen Primärkreislauf (4) mit Trinkwasser, einen sekundären Sicherheitskreislauf (6) mit einem die Gesundheit nicht gefährdenden Stoff als Frostschutzmittel und einen Tertiärkreislauf (7) mit einem Kältemittel aufweist, dadurch gekennzeichnet, dass der Primärkreislauf (4) einen mit einer Trinkwasserversorgungsanlage verbundenen Zulauf (3) und einen Ablauf (5) mit elektrisch steuerbaren Magnetventilen (16) aufweist, wobei der Primärkreislauf (4) oder der Kältemittelkreislauf (7) einen gegenüber dem Sicherheitskreislauf (6) höheren Druck aufweist und der Sicherheitskreislauf (6) mit einem Druckwächter versehen ist, der steuerungstechnisch mit den Magnetventilen (16) derart verbunden ist, dass bei einem Druckverlust im Primärkreislauf (4) oder im Kältemittelkreislauf (7) der Zulauf (3) und der Ablauf (5) des Trinkwasser zur Trinkwasseranlage verschlossen ist.1. Safety heat exchanger for the combination of a heat pump with a device of a drinking water supply system having a primary circuit (4) with drinking water, a secondary safety circuit (6) with a health-endangering substance as antifreeze and a tertiary circuit (7) with a refrigerant, characterized characterized in that the primary circuit (4) has an inlet (3) connected to a drinking water supply system and a drain (5) with electrically controllable solenoid valves (16), the primary circuit (4) or the refrigerant circuit (7) having a relation to the safety circuit (6 ) has higher pressure and the safety circuit (6) is provided with a pressure switch, the control technology with the solenoid valves (16) is connected such that at a pressure drop in the primary circuit (4) or in the refrigerant circuit (7) of the inlet (3) and the Drain (5) of the drinking water to the drinking water system diff is lost.
2. Sicherheitswärmetauscher nach Patentanspruch 1, dadurch gekennzeichnet, dass in dem Primärkreislauf (4) in dem Zulauf (3) zu der Umwälzpumpe (14) sowie in dem Ablauf (5) für das Trinkwasser servogesteuerte Magnetventile (16) angeordnet sind.2. Safety heat exchanger according to claim 1, characterized in that in the primary circuit (4) in the inlet (3) to the circulation pump (14) and in the drain (5) for the drinking water servo-controlled solenoid valves (16) are arranged.
3. Sicherheitswärmetauscher nach Patentanspruch 1 bis 2, dadurch gekennzeichnet, dass in dem Sicherheitskreislauf (6) ein Differenzdruckwächter (9) vorgesehen und in dem Kältemittelkreislauf (7) steuerungstechnisch parallel geschaltet ein Druckschalter (18) angeordnet ist.3. Safety heat exchanger according to claim 1 to 2, characterized in that in the safety circuit (6) a differential pressure switch (9) and in the refrigerant circuit (7) control technology connected in parallel, a pressure switch (18) is arranged.
4. Sicherheitswärmetauscher nach Patentanspruch 1 bis 3, dadurch gekennzeichnet, dass der Druckwächter insbesondere über ein Ausdehnungsgefäß (11), ein Sicherheitsventil (12) und ein Manometer (13) verfügt.4. Safety heat exchanger according to claim 1 to 3, characterized in that the pressure monitor in particular via an expansion vessel (11), a safety valve (12) and a pressure gauge (13) has.
5. Sicherheits Wärmetauscher nach Patentanspruch 1 bis 4, dadurch gekennzeichnet, dass der Differenzdruckwächter (9) und der Druckschalter (18) zum Abschalten des Sicherheitswärmetauschers und zum parallelen Schließen der Magnetventile (16) steuerungstechnisch mit dem Verdichter (8), der Umwälzpumpe (14) und Förderpumpe (15) mittels einer Steuerschaltung verbunden sind. 5. Safety heat exchanger according to claim 1 to 4, characterized in that the differential pressure switch (9) and the pressure switch (18) for switching off the safety heat exchanger and for parallel closing of the solenoid valves (16) control technology with the compressor (8), the circulating pump (14 ) and feed pump (15) are connected by means of a control circuit.
6. Sicherheitswärmetauscher nach Patentanspruch 1 bis 5, dadurch gekennzeichnet, dass der Primärkreislauf (4) mit dem Trinkwasser einem höheren Druck gegenüber dem Sicherheitskreislauf (6) aufweist.6. Safety heat exchanger according to claim 1 to 5, characterized in that the primary circuit (4) with the drinking water has a higher pressure compared to the safety circuit (6).
7. Sicherheitswärmetauscher nach Patentanspruch 6, dadurch gekennzeichnet, dass der Druck im Primärkreislauf (4) mit dem Trinkwasser mindestens 4 bar beträgt und der Sicherheitskreislauf (6) auf einen Druck kleiner oder gleich 2 bar eingestellt ist, wobei der Druck im Kältemittelkreislauf (7) auf einen wesentlich höheren Druck von cirka 20 bar eingestellt wird.7. Safety heat exchanger according to claim 6, characterized in that the pressure in the primary circuit (4) with the drinking water is at least 4 bar and the safety circuit (6) is set to a pressure less than or equal to 2 bar, wherein the pressure in the refrigerant circuit (7) is set to a much higher pressure of about 20 bar.
8. Sicherheitswärmetauscher nach Patentanspruch 1 bis 5, dadurch gekennzeichnet, dass der Druck im Primärkreislauf (4) mit dem Trinkwasserkreis grundsätzlich den niedrigsten Druck des Gesamtsystems aufweist.8. Safety heat exchanger according to claim 1 to 5, characterized in that the pressure in the primary circuit (4) with the drinking water circuit basically has the lowest pressure of the entire system.
9. Sicherheitswärmetauscher nach Patentanspruch 8, dadurch gekennzeichnet, dass der Schaltpunkt des Druckschalters (18) im Kältemittelkreislauf (7) bei einem Druck Pmin von 20 bar liegt, wobei der Differenzdruckwächter (9) einen Schaltpunkt bei einem Druck Pmax von 3 bar und bei einem Druck Pmin vom 1,5 bar des Sicherheitskreislaufes (6) aufweist.9. Safety heat exchanger according to claim 8, characterized in that the switching point of the pressure switch (18) in the refrigerant circuit (7) at a pressure Pmin of 20 bar, wherein the differential pressure switch (9) has a switching point at a pressure Pmax of 3 bar and at Pressure Pmin of 1.5 bar of the safety circuit (6).
10. Sicherheitswärmetauscher nach einem der Patentansprüche 1 bis 9, dadurch gekennzeichnet, dass ein Signalgeber vorgesehen ist, der beispielsweise ein akustisches, optisches, mechanisches oder elektrisches Warnsignal oder einen Störungsmeldung abgibt, die bei Bedarf an eine entfernte Überwachungszentrale oder beispielsweise per SMS auf ein Bereitschaftshandy übermittelt wird. 10. Safety heat exchanger according to one of the claims 1 to 9, characterized in that a signal generator is provided which emits, for example, an acoustic, optical, mechanical or electrical warning or fault message, if necessary to a remote monitoring center or, for example by SMS on a standby phone is transmitted.
EP08801224.0A 2007-08-27 2008-08-26 Safety heat exchanger for combining a heat pump with a device of a public drinking water supply facility Not-in-force EP2193313B1 (en)

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PCT/DE2008/001403 WO2009026900A1 (en) 2007-08-27 2008-08-26 Safety heat exchanger for combining a heat pump with a device of a public drinking water supply facility

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007041766B4 (en) * 2007-09-04 2012-04-19 Frank Triesch Leakage monitoring of systems with at least two media circuits, in particular heat exchangers
WO2014145685A1 (en) 2013-03-15 2014-09-18 Crowder College Bi-field solar geothermal system
CN105387506B (en) * 2015-11-03 2019-05-28 启迪新核（北京）能源科技有限公司 The safe heat-exchange system of deep-well low temperature nuclear heating reactor
DE102015014378A1 (en) 2015-11-09 2017-05-11 Wilo Se Method for controlling a centrifugal pump and associated pump system
US20190346191A1 (en) * 2016-12-09 2019-11-14 Mitsubishi Electric Corporation Heat pump apparatus
CN111225847B (en) * 2017-10-23 2022-02-08 三菱电机株式会社 Recording device for railway vehicle, air conditioning device for railway vehicle, and recording method for railway vehicle
DE102019130932A1 (en) * 2019-11-15 2021-05-20 Viessmann Werke Gmbh & Co Kg Procedure for operating a heat pump
DE102020117660A1 (en) * 2019-12-20 2021-06-24 Stiebel Eltron Gmbh & Co. Kg Mobile system set for hot water generation, heating and / or cooling
CN112064570B (en) * 2020-09-25 2021-04-16 中交一公局集团水利工程有限公司 Hydraulic engineering is with energy-efficient drainage pumping station

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2658728A (en) * 1948-06-25 1953-11-10 Lummus Co Method of detecting leakage between heat transfer fluids
US2597744A (en) * 1948-07-20 1952-05-20 Sunroc Refrigeration Company Tube-in-tube heat transfer unit
US4148355A (en) * 1976-10-21 1979-04-10 Dec International, Inc. Water heating system and combined storage tank and heat exchanger unit therefor
US4090554A (en) * 1976-11-17 1978-05-23 The Babcock & Wilcox Company Heat exchanger
US4177858A (en) * 1977-08-22 1979-12-11 Foster Wheeler Energy Corporation Heat exchanger
DE2834442A1 (en) 1978-08-05 1980-02-14 Ernst Wilhelm Guenther Heat pump for household water heating - draws heat from water supply mains as indirect ground heat carrier
DE2926578C2 (en) 1979-06-30 1983-12-15 Wieland-Werke Ag, 7900 Ulm Heat transfer device
DE2930484A1 (en) 1979-07-27 1981-02-12 Nikolaus Thiel Central heating system using heat pump - has heat exchangers on buried water supply line to extract heat for evaporators
DE7927266U1 (en) * 1979-09-26 1980-01-31 Fedder, Dieter, 4420 Coesfeld CONDENSER FOR HEAT PUMPS
EP0113344B1 (en) * 1982-07-16 1988-01-07 The Babcock & Wilcox Company Heat exchangers and methods of construction thereof
AT375770B (en) * 1983-01-27 1984-09-10 Ochsner Gerhard Dipl Ing DEVICE FOR WARMING UP A SECONDARY MEDIUM BY A PRIMARY MEDIUM WITH THE INTERMEDIATION OF A TERTIA MEDIUM
JPS6060449A (en) 1983-09-14 1985-04-08 Matsushita Electric Ind Co Ltd Hot water supplying device
JP3652635B2 (en) * 2001-10-15 2005-05-25 核燃料サイクル開発機構 Heat exchanger with intermediate heat medium
GB0325066D0 (en) 2003-10-28 2003-12-03 Optimum Planed Maintenance Ltd Improvements in and relating to heat recovery
CN1731041B (en) * 2004-08-05 2010-07-28 罗响 Compression type refrigerating, heating apparatus and heat pump water heater combined set
DE102004061441B4 (en) 2004-12-17 2007-04-19 VBL Klimageräte Handelsgesellschaft mbH heat pump
DE202004020126U1 (en) * 2004-12-17 2005-03-17 Vbl Klimageraete Handelsgmbh A heat pump system for buildings has connections to an underground heat exchanger and a heating circuit in which a third circulation circuit is provided

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009026900A1 *

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