EP0936415B1 - Installation d'alimentation d'eau chaude - Google Patents

Installation d'alimentation d'eau chaude Download PDF

Info

Publication number
EP0936415B1
EP0936415B1 EP98120877A EP98120877A EP0936415B1 EP 0936415 B1 EP0936415 B1 EP 0936415B1 EP 98120877 A EP98120877 A EP 98120877A EP 98120877 A EP98120877 A EP 98120877A EP 0936415 B1 EP0936415 B1 EP 0936415B1
Authority
EP
European Patent Office
Prior art keywords
water
circulation
heating
heat exchanger
installation according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98120877A
Other languages
German (de)
English (en)
Other versions
EP0936415A2 (fr
EP0936415A3 (fr
Inventor
Ulrich Kroell
Manfred Oehrlein
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0936415A2 publication Critical patent/EP0936415A2/fr
Publication of EP0936415A3 publication Critical patent/EP0936415A3/fr
Application granted granted Critical
Publication of EP0936415B1 publication Critical patent/EP0936415B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/238—Flow rate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/36—Control of heat-generating means in heaters of burners
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • 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
    • F24D17/0078—Recirculation systems

Definitions

  • the invention relates to a hot water supply system according to the preamble of the main claim.
  • the heater of which has a secondary heat exchanger for hot water heating which is fed via a heating water circuit the flow circuit for the circulation water leads through a storage device which is also fed by the heating water circuit and is at least kept at the maintenance temperature of the circulation water.
  • the frequency at which the heater is switched on can be reduced in times of low heating and hot water heating requirements.
  • the heating of a storage tank and the installation means and work required for this increase the production outlay and the costs for the heater.
  • the arrangement according to the invention with the features of the main claim has the advantage that the heater is only switched on in pure circulation mode when the temperature of the heat exchanger has dropped to the maintenance temperature of the circulation water. This will also Without heating and installing a storage tank, the frequency at which the heater is switched on is reduced in times that are otherwise low in heat requirements and based on the actual need to maintain the circulating water temperature.
  • a temperature sensor that detects the heating temperature of the heat exchanger can advantageously be provided to control the heat source in pure circulation mode.
  • a sensor for detecting the hot water or tap water temperature can be provided between the heat exchanger and the hot water connection of the heater.
  • the amount of circulation water can be limited simply and reliably by arranging a water flow limiter in the circulation line to a value below the amount of water that is switched on.
  • the different water flow between the circulation and the normal tap water quantity can advantageously be determined by a water quantity sensor arranged between the cold water connection and the heat exchanger.
  • the heat source of which also feeds a heat exchanger in a heating water network the circulation water can be heated without a supply in parallel with the heating water so that the heat supply to the heating water network is not interrupted or delayed.
  • the parallel heating of heating water and circulation water can be easily achieved if both heat exchangers are combined into one unit.
  • the system shown has a heater 10 with a gas burner 12, which heats a combined heat exchanger 14 for heating water and process water.
  • the heat exchanger 14 designed as a lamella block is penetrated by a line carrying heating water, the flow line 16 of which is connected to a connection 18 for a heating network represented by the symbol 20. Its other end is connected via a connection 22 on the heater 10 to a return line 24, which leads via a circulating pump 25 to the heating water inlet of the heat exchanger 14.
  • the finned block of the heat exchanger 14 is also penetrated by pipes carrying process water which are connected via a cold water line 26 to a cold water connection 28 and via a hot water line 30 to a hot water connection 32.
  • a line 34 is connected to the hot water connection 32, which leads to taps 36.
  • a water quantity limiter 38 is installed in the cold water line 26 and is set to the predetermined maximum value of the tap water quantity flowing through per unit time.
  • a temperature sensor 40 is on the hot water line 30 provided, which is connected to the control device of the device, not shown, which controls or regulates, among other things, the temperature of the tap water flowing through.
  • the system shown also has a flow circuit for circulation water, which leads via a circulation line 42.
  • This has an inner line 44 which branches off from the cold water line 26 at a connection 46 and leads via a water quantity limiter 48 to a circulation connection 50 of the device. From there, the circulation line 42 continues via a backflow preventer 52 and a circulation pump 54 to the tap 36, where it is connected correspondingly branched to the line 34 leading into the tap water.
  • the flow circuit for the circulation water closes via that section of the tap water line which leads from the connection 46 to the hot water connection 32 and from there to the tap 36.
  • a turbine is installed as a water quantity sensor (56) between the water quantity limiter 38 and the heat exchanger 14.
  • the water flow limiter 48 is set so that the circulation water quantity is smaller than the switch-on water quantity at which the heater 10 starts operating at the power intended for heating the tap water.
  • a water quantity sensor can also be used, with the aid of which the circulation water quantity can be controlled or limited. Due to legal regulations, it is mandatory, for example, that the circulation water has a minimum temperature to eliminate the risk of legionella. With the help of the water quantity sensor and the circulation pump 54, the circulation water quantity can be detected and adjusted in accordance with this specification.
  • the circulation pump 54 can continue by known means such. B. controlled by a timer.
  • the water quantity sensor 56 detects the different water flow between the circulation mode and the normal tap water withdrawal. If the temperature at the heat exchanger 14 has dropped below a value assigned to the circulation temperature, the gas burner 12 is put into operation with the power required for heating the circulation water to a predetermined setpoint value or to the maintenance temperature.
  • the appropriately designed temperature sensor 40 can be used to detect the temperature at the heat exchanger 14 or an additional temperature sensor can be provided directly at the heat exchanger 14. If there is a heating request from the heating network at the same time, DHW heating can take priority. However, if the temperature of the heat exchanger is above the setpoint when there is a demand for heat from the heating network, parallel operation of DHW heating and heating water heating can be provided.

Landscapes

  • 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)
  • Fluid Mechanics (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Claims (6)

  1. Installation d'alimentation en eau chaude comportant un système de conduite (26, 30, 34) pour prélever l'eau reliant une alimentation en eau froide (28) à travers un échangeur de chaleur (14) d'un appareil de chauffage jusque vers les points de prélèvement (36) et
    un circuit (42, 44) de circulation d'eau passant par l'échangeur de chaleur (14) et une conduite de circulation (42, 44) comportant une pompe de circulation (54), la conduite étant reliée au système de conduite (26, 30, 34) pour l'eau de prélèvement, et en outre
    des moyens de commande équipant l'appareil de chauffage et qui activent sa source chaude (12) en fournissant une puissance dépendant de la quantité d'eau prélevée si la quantité d'eau arrivant dans l'échangeur de chaleur dépasse une valeur minimale dite « quantité d'eau de déclenchement »,
    caractérisée en ce que
    la quantité d'eau de circulation est limitée à une valeur inférieure à la quantité d'eau de déclenchement et en cas de fonctionnement uniquement en circulation, la source d'eau est commandée à la puissance requise pour maintenir une température prédéterminée dans l'eau de circulation.
  2. Installation selon la revendication 1,
    caractérisée en ce que
    pour commander la source de chaleur (12) pour le seul mode de fonctionnement en circulation, il est prévu un capteur de température (40) qui détecte la température de chauffage de l'échangeur de chaleur (14).
  3. Installation selon la revendication 1 ou 2,
    caractérisée en ce que
    la quantité d'eau de circulation est déterminée par un limiteur de quantité d'eau (48) dans la conduite de circulation (42).
  4. Installation selon l'une des revendications 1 à 3,
    caractérisée en ce qu'
    on détermine le débit d'eau différent entre la quantité d'eau de circulation et la quantité d'eau normalement prélevée par un capteur de quantité d'eau (56) installé entre l'alimentation en eau froide (28) et l'échangeur de chaleur (14).
  5. Installation selon l'une des revendications précédentes, comportant un appareil de chauffage dont la source de chaleur alimente également un échangeur de chaleur appartenant à un réseau d'eau de chauffage (appareil de chauffage d'eau de circulation),
    caractérisée en ce que
    le chauffage de l'eau de circulation se fait sans priorité en parallèle avec le chauffage de l'eau de chauffage.
  6. Installation selon la revendication 5,
    caractérisée en ce que
    les deux échangeurs de chaleur sont combinés en un ensemble (14).
EP98120877A 1998-02-14 1998-11-04 Installation d'alimentation d'eau chaude Expired - Lifetime EP0936415B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19806115 1998-02-14
DE19806115A DE19806115A1 (de) 1998-02-14 1998-02-14 Warmwasser-Versorgungsanlage

Publications (3)

Publication Number Publication Date
EP0936415A2 EP0936415A2 (fr) 1999-08-18
EP0936415A3 EP0936415A3 (fr) 2001-09-12
EP0936415B1 true EP0936415B1 (fr) 2004-03-31

Family

ID=7857748

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98120877A Expired - Lifetime EP0936415B1 (fr) 1998-02-14 1998-11-04 Installation d'alimentation d'eau chaude

Country Status (3)

Country Link
EP (1) EP0936415B1 (fr)
DE (2) DE19806115A1 (fr)
ES (1) ES2218743T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10016172A1 (de) * 2000-03-31 2001-10-11 Bosch Gmbh Robert Heizungsanlage mit Wärmeeerzeuger, Regelkreis und Zweikreis-Wärmetauscher
DE10016179C2 (de) * 2000-03-31 2002-10-24 Bosch Gmbh Robert Heizungsanlage mit einem Wärmeerzeuger, einem Wärmeübertrager für einen Heizkreis und einen Brauchwasserladekreis eines Warmwasserspeichers
GB0013594D0 (en) * 2000-06-06 2000-07-26 Macphail Nicholas J J Secondary loop for combi boilers
ITAN20010008A1 (it) * 2001-02-07 2002-08-07 Merloni Termosanitari Spa Caldaia con produzione istantanea di acqua calda perfezionata
DE102005038406A1 (de) * 2005-08-12 2007-02-15 Markus Labuhn Verfahren zum Betreiben einer Anlage zur Bereitstellung von Warmwasser und entsprechende Einrichtung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4166944A (en) * 1977-07-25 1979-09-04 Scott Kenneth W Water heater control system
DE3431555A1 (de) * 1984-08-28 1986-03-06 Peter von 6300 Gießen Schnakenburg Warmwasser-versorgungsanlage

Also Published As

Publication number Publication date
EP0936415A2 (fr) 1999-08-18
EP0936415A3 (fr) 2001-09-12
DE19806115A1 (de) 1999-08-19
ES2218743T3 (es) 2004-11-16
DE59811103D1 (de) 2004-05-06

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