EP0334797A2 - Hot-water tank - Google Patents

Hot-water tank Download PDF

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Publication number
EP0334797A2
EP0334797A2 EP89710016A EP89710016A EP0334797A2 EP 0334797 A2 EP0334797 A2 EP 0334797A2 EP 89710016 A EP89710016 A EP 89710016A EP 89710016 A EP89710016 A EP 89710016A EP 0334797 A2 EP0334797 A2 EP 0334797A2
Authority
EP
European Patent Office
Prior art keywords
thermostat
heating
water
temperature
storage space
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
EP89710016A
Other languages
German (de)
French (fr)
Other versions
EP0334797A3 (en
EP0334797B1 (en
Inventor
Herbert Bechem
Jürgen Dr. Tenhumberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vaillant BV
Original Assignee
Vaillant Austria GmbH
Nv Vaillant Sa
Joh Vaillant GmbH and Co
Vaillant GmbH
Vaillant SARL
Vaillant Ltd
SCHONEWELLE BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Vaillant Austria GmbH, Nv Vaillant Sa, Joh Vaillant GmbH and Co, Vaillant GmbH, Vaillant SARL, Vaillant Ltd, SCHONEWELLE BV filed Critical Vaillant Austria GmbH
Publication of EP0334797A2 publication Critical patent/EP0334797A2/en
Publication of EP0334797A3 publication Critical patent/EP0334797A3/en
Application granted granted Critical
Publication of EP0334797B1 publication Critical patent/EP0334797B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0073—Arrangements for preventing the occurrence or proliferation of microorganisms in the water

Definitions

  • the invention relates to a hot water tank with a thermostat arranged in the central or upper region of the storage space, which monitors the temperature of the tap water to be drawn, and a thermostat arranged in the floor area of the storage space, which monitors the temperature below this limit in this floor area Heating.
  • Such a hot water tank has become known from DE-OS 3 346 513.
  • a heat pump is used to heat the tank, and switching between the two sensors is carried out in order to either heat a small amount of water at a high temperature when there is little hot water or an increased amount when there is a large amount of water To be able to provide water.
  • a gas-heated hot water tank has become known, which can both store service water and can give off heat to the circulating water of a heating system.
  • the motor of a circulation pump of the heating system is acted upon by a temperature sensor, which senses the interior of the store.
  • a temperature sensor which senses the interior of the store.
  • a second temperature sensor that controls the heating of the storage tank.
  • a directly heated hot water tank has become known from DE-OS 3 310 023, in which three temperature sensors are provided which control the heating of the tank in connection with an automatic burner control.
  • the object is achieved according to the invention in that the lower thermostat is coupled to a timer which only switches on the heating of the storage water if within a predetermined period of time no heating controlled by the thermostats arranged in the middle or upper area of the storage space has occurred.
  • This configuration makes it possible to query within selectable periods of time whether the store has been reheated. If this has not happened, the heating is released via the timing element in such a way that the entire contents of the memory are heated to a temperature which ensures that the bacteria are killed.
  • the only drawing figure shows a schematic vertical section of a storage tank 1 with a raised floor 2.
  • the flow line 4 of a burner-heated water heater not shown, opens, the hot water of which flows through the storage space 3 for heating the storage water in a coil 5 and then flows back to the water heater in the return line 7 passing through the storage ceiling 6.
  • a cold water supply line 8 also passes through the storage ceiling 6 and opens into the floor area of the storage space 3.
  • a hot water supply line 9 extends from the storage ceiling 6.
  • a thermostat 10 is - as usual - arranged in the middle or upper area of the storage space 3. If the temperature falls below a threshold value, he switches the heating of the storage water through the coil 5 flowing hot water, and switches off the heating when an upper limit is reached.
  • the lower additional thermostat 11 in the floor area ensures that the water temperature in this floor area does not drop too long, allowing a development of microorganisms below a threshold value that enables development.
  • this thermostat 11 can be coupled to a timer which only causes heating of the storage water controlled by this thermostat 11 if no heating controlled by the upper thermostat 10 has occurred within a predetermined period of time.

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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-Pump Type And Storage Water Heaters (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Percussion Or Vibration Massage (AREA)

Abstract

Hot water tank with heating which is controlled by the temperature of the stored water by means of a thermostat which is arranged in the central or upper region of the storage space and monitors the temperature of the service water to be drawn, and of a thermostat which is arranged in the bottom region of the storage space and monitors falling below a temperature limit value in this bottom region. The lower thermostat (11) is connected to a timer which only switches on heating of the stored water when heating controlled by the thermostat (10) arranged in the central or upper region of the storage space (3) has not taken effect within a predetermined period of time.

Description

Die Erfindung betrifft einen Warmwasserspeicher mit einer von der Temperatur des Speicherwassers mittels eines im mittleren oder oberen Bereich des Speicherraums angeord­neten, die Temperatur des zu zapfenden Brauchwassers überwachenden Thermostaten, und eines im Bodenbereich des Speicherraums angeordneten, die Unterschreitung eines Temperaturgrenzwertes in diesem Bodenbereich überwachen­den Thermostaten gesteuerten Beheizung.The invention relates to a hot water tank with a thermostat arranged in the central or upper region of the storage space, which monitors the temperature of the tap water to be drawn, and a thermostat arranged in the floor area of the storage space, which monitors the temperature below this limit in this floor area Heating.

Ein solcher Warmwasserspeicher ist bekanntgeworden aus der DE-OS 3 346 513. Hier findet zur Beheizung des Spei­chers eine Wärmepumpe Anwendung, und zwischen den beiden Fühlern wird umgeschaltet, um entweder bei geringem Warm­wasserbedarf eine kleine Wassermenge hoher Temperatur oder bei großem Wasserbedarf eine gesteigerte Menge er­wärmten Wassers bereitstellen zu können.Such a hot water tank has become known from DE-OS 3 346 513. Here, a heat pump is used to heat the tank, and switching between the two sensors is carried out in order to either heat a small amount of water at a high temperature when there is little hot water or an increased amount when there is a large amount of water To be able to provide water.

Aus der DE-OS 2 923 488 ist ein gasbeheizter Warmwasser­speicher bekanntgeworden, der sowohl Brauchwasser spei­chern kann als auch Wärme an das Umlaufwasser einer Heizungsanlage abgeben kann.From DE-OS 2 923 488, a gas-heated hot water tank has become known, which can both store service water and can give off heat to the circulating water of a heating system.

Um letzteres zu bewerkstelligen, ist der Motor einer Um­wälzpumpe des Heizungssystems von einem Temperaturfühler beaufschlagt, der den Innenraum des Speichers abfühlt. Daneben ist ein zweiter Temperaturfühler vorhanden, der die Beheizung des Speichers steuert.In order to accomplish the latter, the motor of a circulation pump of the heating system is acted upon by a temperature sensor, which senses the interior of the store. There is also a second temperature sensor that controls the heating of the storage tank.

Schließlich ist aus der DE-OS 3 310 023 ein direkt be­heizter Warmwasserspeicher bekanntgeworden, bei dem drei Temperaturfühler vorgesehen sind, die in Verbindung mit einem Feuerungsautomaten die Beheizung des Speichers steuern.Finally, a directly heated hot water tank has become known from DE-OS 3 310 023, in which three temperature sensors are provided which control the heating of the tank in connection with an automatic burner control.

Es ist Aufgabe der vorliegenden Erfindung, den Bodenbereich des Heißwasserspeichers, der durch das einströmende Kaltwasser bei Brauchwasserzapfung häufig kühl wird beziehungsweise sich nicht ausreichend erwärmt, von Zeit zu Zeit auf eine höhere Temperatur auf­zuheizen, um die Vermehrung der die sogenannte Legionärs­krankheit verursachenden Bakterien zu unterbinden.It is an object of the present invention to heat the floor area of the hot water storage tank, which often becomes cool or not sufficiently heated due to the incoming cold water when hot water is drawn, from time to time to prevent the multiplication of the bacteria causing the so-called legionnaires' disease.

Die Lösung der Aufgabe erfolgt erfindungsgemäß dadurch, daß der untere Thermostat mit einem Zeitglied gekoppelt ist, das eine Beheizung des Speicherwassers nur dann ein­schaltet, wenn innerhalb einer vorgegebenen Zeitspanne keine durch den im mittleren oder oberen Bereich des Speicherraums angeordneten Thermostaten gesteuerte Be­heizung eingetreten ist.The object is achieved according to the invention in that the lower thermostat is coupled to a timer which only switches on the heating of the storage water if within a predetermined period of time no heating controlled by the thermostats arranged in the middle or upper area of the storage space has occurred.

Durch diese Ausgestaltung ist es möglich, innerhalb wähl­barer Zeiträume abzufragen, ob der Speicher nachgeheizt wurde. Ist dies nicht geschehen, so wird über das Zeit­glied die Beheizung so freigegeben, daß der gesamte Spei­cherinhalt auf eine die Abtötung der Bakterien gewährlei­stende Temperatur aufgeheizt wird.This configuration makes it possible to query within selectable periods of time whether the store has been reheated. If this has not happened, the heating is released via the timing element in such a way that the entire contents of the memory are heated to a temperature which ensures that the bacteria are killed.

Die einzige Zeichnungsfigur stellt in einem schematischen Vertikalschnitt einen Speicherbehälter 1 mit einem Dop­pelboden 2 dar. In den Speicherraum 3 dieses Speicherbe­hälters 1 mündet die Vorlaufleitung 4 eines nicht darge­stellten brennerbeheizten Wasserheizers, dessen Heißwas­ser den Speicherraum 3 zum Aufheizen des Speicherwassers in einer Wendel 5 durchströmt und sodann in der die Spei­cherdecke 6 durchsetzenden Rücklaufleitung 7 zum Wasser­heizer zurückströmt. Eine Kaltwasserzufuhrleitung 8 durchsetzt ebenfalls die Speicherdecke 6 und mündet in den Bodenbereich des Speicherraumes 3. Eine Brauchwasser­zapfleitung 9 geht von der Speicherdecke 6 aus.The only drawing figure shows a schematic vertical section of a storage tank 1 with a raised floor 2. In the storage space 3 of this storage tank 1, the flow line 4 of a burner-heated water heater, not shown, opens, the hot water of which flows through the storage space 3 for heating the storage water in a coil 5 and then flows back to the water heater in the return line 7 passing through the storage ceiling 6. A cold water supply line 8 also passes through the storage ceiling 6 and opens into the floor area of the storage space 3. A hot water supply line 9 extends from the storage ceiling 6.

Zur Überwachung der Temperatur des zu zapfenden Brauch­wassers ist - wie üblich - ein Thermostat 10 im mittleren oder oberen Bereich des Speicherraumes 3 angeordnet. Bei Unterschreitung eines Temperaturgrenzwertes schaltet er die Beheizung des Speicherwassers durch das die Wendel 5 durchströmende Heißwasser ein, und bei Erreichen eines oberen Grenzwertes schaltet er die Beheizung ab.To monitor the temperature of the tap water to be drawn off, a thermostat 10 is - as usual - arranged in the middle or upper area of the storage space 3. If the temperature falls below a threshold value, he switches the heating of the storage water through the coil 5 flowing hot water, and switches off the heating when an upper limit is reached.

Der untere zusätzliche Thermostat 11 im Bodenbereich sorgt hingegen dafür, daß die Wassertemperatur in diesem Bodenbereich nicht auf allzulange, eine Entwicklung von Kleinstlebewesen ermöglichende Dauer unterhalb eines die Entwicklung ermöglichenden Grenzwert absinkt. Zu diesem Zweck kann dieser Thermostat 11 mit einem Zeitglied ge­koppelt werden, das eine von diesem Thermostaten 11 ge­steuerte Beheizung des Speicherwassers nur dann veran­laßt, wenn innerhalb einer vorgegebenen Zeitspanne keine durch den oberen Thermostaten 10 gesteuerte Beheizung eingetreten ist.The lower additional thermostat 11 in the floor area, on the other hand, ensures that the water temperature in this floor area does not drop too long, allowing a development of microorganisms below a threshold value that enables development. For this purpose, this thermostat 11 can be coupled to a timer which only causes heating of the storage water controlled by this thermostat 11 if no heating controlled by the upper thermostat 10 has occurred within a predetermined period of time.

Durch dieses Zusammenwirken der beiden Thermostaten 10 und 11 werden demnach für die Entwicklung von Kleinstle­bewesen eforderliche Mindestverweilzeiten, in denen die Temperatur den für die Keimtötung erforderlichen Mindest­wert unterschreitet, zuverlässig vermieden.This interaction of the two thermostats 10 and 11 therefore reliably avoids the minimum dwell times required for the development of microorganisms, in which the temperature falls below the minimum value required for germ killing.

Claims (1)

Warmwasserspeicher mit einer von der Temperatur des Speicherwassers mittels eines im mittleren oder oberen Bereich des Speicherraumes angeord­neten, die Temperatur des zu zapfenden Brauch­wassers überwachenden Thermostaten und eines im Bodenbereich des Speicherraumes angeordneten, die Unterschreitung eines Temperaturgrenzwertes in diesem Bodenbereich überwachenden Thermosta­ten gesteuerten Beheizung, dadurch gekennzeich­net, daß der untere Thermostat (11) mit einem Zeitglied gekoppelt ist, das eine Beheizung des Speicherwassers nur dann einschaltet, wenn in­nerhalb einer vorgegebenen Zeitspanne keine durch den im mittleren oder oberen Bereich des Speicherraumes (3) angeordneten Thermostaten (10) gesteuerte Beheizung eingetreten ist.Hot water storage tank with a thermostat controlled by the temperature of the storage water by means of a thermostat arranged in the middle or upper area of the storage space, monitoring the temperature of the tap water to be drawn off, and a thermostat arranged in the floor area of the storage space, monitoring the temperature falling below this limit in this floor area, characterized in that that the lower thermostat (11) is coupled to a timing element which only switches on heating of the storage water if no heating controlled by the thermostats (10) arranged in the middle or upper region of the storage space (3) has occurred within a predetermined period of time.
EP89710016A 1988-03-24 1989-03-17 Hot-water tank Expired - Lifetime EP0334797B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0078288A AT394902B (en) 1988-03-24 1988-03-24 HOT WATER TANK
AT782/88 1988-03-24

Publications (3)

Publication Number Publication Date
EP0334797A2 true EP0334797A2 (en) 1989-09-27
EP0334797A3 EP0334797A3 (en) 1990-08-16
EP0334797B1 EP0334797B1 (en) 1991-12-11

Family

ID=3499620

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89710016A Expired - Lifetime EP0334797B1 (en) 1988-03-24 1989-03-17 Hot-water tank

Country Status (5)

Country Link
EP (1) EP0334797B1 (en)
AT (2) AT394902B (en)
DE (2) DE58900547D1 (en)
ES (1) ES2029134T3 (en)
GR (1) GR3003665T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168546A (en) * 1990-11-28 1992-12-01 Hydro-Quebec Device for heating the bacterial proliferation zone of a water heater to prevent legionellosis
EP1094279A2 (en) * 1999-10-19 2001-04-25 Heatex B.V. Management of heated water in a storage boiler with anti-Legionella provisions
EP1281918A2 (en) * 2001-08-04 2003-02-05 Robert Bosch Gmbh Installation for making warm water with a warm water accumulator

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59004177D1 (en) * 1989-04-06 1994-02-24 Vaillant Joh Gmbh & Co Process for disinfecting a domestic water system.
DE59404181D1 (en) * 1993-02-18 1997-11-06 Friedrich Mueller Method for combating Legionella in a hot water storage system
DE19524079B4 (en) * 1995-07-01 2006-08-03 Stiebel Eltron Gmbh & Co. Kg Method and circuit for controlling Legionella

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3525990A1 (en) * 1985-07-20 1987-01-29 Buderus Ag Sanitary water heating tank
EP0178351B1 (en) * 1984-10-15 1988-05-04 Plaatverwerkende Industrie van Wijk en Boerma B.V. Water heating appliance e.g. a domestic boiler

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2923488C2 (en) * 1979-06-09 1983-03-03 Rheem Bühring GmbH, 4040 Neuss Water storage heater
DE3310023C2 (en) * 1983-03-19 1986-10-30 Ruhrgas Ag, 4300 Essen Storage water heating system
DE3346513A1 (en) * 1983-12-22 1985-07-11 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co. KG, 7000 Stuttgart Apparatus for heating water
DE3804647C1 (en) * 1988-02-15 1989-08-03 Buderus Heiztechnik Gmbh, 6330 Wetzlar, De Heating-up circuit of a storage domestic-water heater

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0178351B1 (en) * 1984-10-15 1988-05-04 Plaatverwerkende Industrie van Wijk en Boerma B.V. Water heating appliance e.g. a domestic boiler
DE3525990A1 (en) * 1985-07-20 1987-01-29 Buderus Ag Sanitary water heating tank

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5168546A (en) * 1990-11-28 1992-12-01 Hydro-Quebec Device for heating the bacterial proliferation zone of a water heater to prevent legionellosis
EP1094279A2 (en) * 1999-10-19 2001-04-25 Heatex B.V. Management of heated water in a storage boiler with anti-Legionella provisions
EP1094279A3 (en) * 1999-10-19 2003-01-15 Heatex B.V. Management of heated water in a storage boiler with anti-Legionella provisions
EP1281918A2 (en) * 2001-08-04 2003-02-05 Robert Bosch Gmbh Installation for making warm water with a warm water accumulator
EP1281918A3 (en) * 2001-08-04 2004-07-07 Robert Bosch Gmbh Installation for making warm water with a warm water accumulator

Also Published As

Publication number Publication date
EP0334797A3 (en) 1990-08-16
ATE70349T1 (en) 1991-12-15
DE58900547D1 (en) 1992-01-23
EP0334797B1 (en) 1991-12-11
AT394902B (en) 1992-07-27
DE8903316U1 (en) 1989-04-27
ATA78288A (en) 1991-12-15
GR3003665T3 (en) 1993-03-16
ES2029134T3 (en) 1992-07-16

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