EP2682682B1 - Procédé de fonctionnement d'un dispositif de production d'eau chaude sanitaire - Google Patents

Procédé de fonctionnement d'un dispositif de production d'eau chaude sanitaire Download PDF

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Publication number
EP2682682B1
EP2682682B1 EP13171166.5A EP13171166A EP2682682B1 EP 2682682 B1 EP2682682 B1 EP 2682682B1 EP 13171166 A EP13171166 A EP 13171166A EP 2682682 B1 EP2682682 B1 EP 2682682B1
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EP
European Patent Office
Prior art keywords
programme
drinking water
heating
rest
heat source
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.)
Not-in-force
Application number
EP13171166.5A
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German (de)
English (en)
Other versions
EP2682682A3 (fr
EP2682682A2 (fr
Inventor
Matthias Senn
Marcus Doehler
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
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Robert Bosch GmbH
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Publication date
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Publication of EP2682682A3 publication Critical patent/EP2682682A3/fr
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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
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • 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
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • F24H9/2028—Continuous-flow heaters

Definitions

  • the invention relates to a method for operating a domestic hot water supply device according to the flow principle according to the preamble of patent claim 1.
  • Domestic hot water supply devices are used in particular in building technology to provide domestic hot water for consumers.
  • the hot water taps are often several meters of pipe length away from the domestic hot water supply device (water heater, water heater). If there is a longer time interval between successive taps, the domestic hot water in the pipeline cools down between the domestic hot water supply device and the tapping point and is initially cold at the next tapping start. Now, the standing in the pipeline, cooled drinking water must drain unused before freshly supplied domestic hot water reaches the tap and can be used.
  • the so-called drinking water circulation is used, in which drinking water is circulated via a circulation pipe and kept warm. The circulation line branches off shortly before the tapping point of the pipe leading to the tap and leads back to the domestic hot water supply device. The circulation ensures that the hot water in the drinking water pipe does not or only slightly cools down and at the tapping point there is always warm drinking water available.
  • Calcifications in the area of the burner are, for example, in DE 2 214 880 A avoided.
  • a heating system with a water cycle described as a heat transfer medium.
  • a gas-heated water heater and a circulation pump are integrated into the water cycle.
  • the circulation pump can be switched on and off via a temperature controller, which also controls the fuel supply to the burner of the water heater.
  • the circulating pump is switched off to prevent the formation of steam, for the removal of heat from the burner and to reduce limescale in the burner until after a certain run after switching off the fuel supply.
  • the caster continues until the temperature is below a critical value. In the combination of such a caster with a transfer of heat to service water, however, there are new, especially shifted difficulties.
  • the invention has for its object to avoid lime deposits in heat exchangers, in which in particular drinking water is heated by means of a heating fluid according to the flow principle, with a lag of the heating fluid in a heating circuit after deactivation of the heat source should be possible.
  • it is an objective to enable a durable, maintenance-free and efficient water heating at low cost.
  • the invention relates to a method for operating a hot water supply device according to the flow principle with a heat exchanger having a first flow channel for drinking water and a second flow channel for a heating fluid to be heated by a heat source.
  • the first flow channel is hydraulically connected to a drinking water connection via a supply line and hydraulically connected to a domestic hot water collector via a discharge line.
  • the supply line via a circulation line to the discharge line is hydraulically connected, wherein in the circulation line an activatable circulation pump is arranged.
  • the heat source is operated as a function of a user behavior (drinking water taps) phase by phase in a heating program and phase by phase in a rest program.
  • the activated heat source heats the heating fluid and drinking water is channeled through the first flow channel and heated by the heating fluid in the first flow channel.
  • the deactivated heat source provides no heat when the rest program is activated and no water is supplied to the domestic hot water receiver.
  • the method is further distinguished by the fact that the activation times of the rest program (times at which the rest program is activated for the first time or again) are recorded. These activation times of the rest program are utilized such that when there is an activation time the rest program is initiated (started) with a wake, during the wake the circulation pump is activated in the circulation line and drinking water is circulated through the circulation line and the first flow channel.
  • the drinking water in the first flow channel is in motion. Because of the continuous cooling of the heat exchanger by the drinking water, there are no temperature peaks when it is heated with corresponding Kalkaus responsiblen.
  • the drinking water comes during the Inventory according to the invention in the first flow channel also not to a halt when the domestic hot water consumer no hot water decreases or ends the domestic hot water withdrawal. Consequently, the heat exchanger as well as the heating fluid located in the heat exchanger can deliver heat to the circulating drinking water during the after-run and cool it, without the drinking water being heated excessively and locally in the heat exchanger. Rather, the heat is distributed to the drinking water volume of the entire circulation circuit.
  • the efficiency of the domestic hot water production is high because the heat transfer performance of the heat exchanger is permanently ensured without hindering limescale.
  • it is particularly favorable to resort to existing circulation systems and pumps in the building services. These are present in the prior art, however, the circulation pump is activated here exclusively at fixed times of the day to ensure a particularly fast hot water supply to the water consumer. During a rest program, however, the circulation pump in the prior art is always deactivated.
  • the heating program is activated and the rest program is deactivated when the domestic hot water customer requests heated water.
  • the process is suitable not only for domestic central heating but also for continuous flow heating aligned domestic hot water generators and combination heaters for heating heating water and drinking water. By only heating the water, even if hot water is consumed, the efficiency of hot water production also increases.
  • a further embodiment of the method provides that the heating program is deactivated and the rest program is activated when the water collector does not request heated water.
  • the heat source comprises a heating device which is activated in the heating program and deactivated in the quiescent program.
  • the heat source is connected to the second flow channel and the heating fluid can be conveyed by means of an activatable feed pump through the second flow channel, wherein the feed pump is activated in the heating program and deactivated in the rest program.
  • the heating fluid is therefore only circulated when it is needed as a heat transfer medium for heat transport.
  • the delivery pump can be regulated in the activated state, in particular between a minimum delivery rate and a maximum delivery rate.
  • the deactivation of the feed pump in the idle program is not necessarily at its beginning, but can also be disabled during the rest program.
  • the feed pump also performs a wake. In most scenarios it is shorter than or equal to the after-run of the circulation pump.
  • the power of the feed pump is regulated in the wake. By means of the wake of the feed pump damage (overheating, calcification) are avoided at the heat source or the heater.
  • the operating state of the feed pump is registered and a deactivation of the feed pump is evaluated as the activation time of the rest program.
  • a deactivation of the feed pump is evaluated as the activation time of the rest program.
  • the operating state of the heat source is registered and a deactivation of the heat source or the heating device is evaluated as the activation time of the rest program.
  • the activation times of the rest program can thus be determined simply and reliably.
  • an embodiment of the method provides that the wake is terminated according to a defined criterion, wherein the criterion is either a defined activation time or a defined flow rate of water or below a threshold temperature at least one sensory monitored position of the heat exchanger (preferably at a monitored Position of the first flow channel).
  • a defined activation time can be set particularly easily.
  • either a quantity sensor or the determination of the time and capacity of the circulation pump is necessary for the flow rate.
  • the invention provides that the limit temperature is less than 60 degrees Celsius. Preferably, it is between 45 and 60 degrees Celsius. If the temperature is below this critical size, the risk of lime failure is greatly reduced.
  • the method is particularly suitable in combination with heat sources which comprise a fuel or electricity-operated heater or a buffer store.
  • heat sources which comprise a fuel or electricity-operated heater or a buffer store.
  • this also includes electrically driven heat pumps, the heat exchanger then acts as a capacitor.
  • Fig. 1 1 shows a hot water supply device 1 with a heat exchanger 10, which has a first flow channel 11 for drinking water W and a second flow channel 18 for a heating fluid M to be heated by a heat source 30.
  • the first flow channel 11 is hydraulically connected via a supply line 14 to a drinking cold water connection 15 and via a discharge line 16 to a domestic hot water collector 17 (not shown here).
  • the supply line 14 is hydraulically connected via a circulation line 40 to the discharge line 16.
  • an activatable circulation pump 41 and a check valve 42 are arranged in the circulation line 40.
  • the check valve 42 only allows a flow direction from the discharge line 16 in the direction of the supply line 14.
  • the heat source 30 includes a heater 32. It is not apparent here whether it is a fuel or electricity heater or a buffer. However, it can be seen that the heat source 30 is connected to the second flow channel 18, and that the heating fluid M can be conveyed by means of an activatable feed pump 31 through the second flow channel 18. The heating fluid M and the water W flow in the reverse direction, i. in the opposite direction, through the heat exchanger 10. In this case, a temperature sensor 21 for detecting the water temperature in or on the first flow channel 11 is arranged at a position S.
  • control unit 20 which with the circulation pump 41, the feed pump 31 and the temperature sensor 21st connected is.
  • control unit 20 In the control unit 20 and the heating program P1 and the rest program P2 including overrun P2.1 are stored.
  • the heat source 30 is operated in phases in a heating program P1 and phased in a rest program P2, in particular by activating and deactivating the feed pump 31.
  • the heating program P1 is activated and the rest program P2 deactivated when the water collector 17 requests heated water W.
  • the heating program P1 is deactivated and the rest program P2 is activated when the water collector 17 does not request heated water W.
  • the activated heat source 30 heats the heating fluid M and water W is passed through the first flow passage 11 and heated by means of the heating fluid M in the first flow passage 11.
  • the water W can be directed to the water collector 17 or promoted by activating the circulation pump 41 in a circle. If the rest program P2 is activated, however, the deactivated heat source 30 does not provide any heat and no water W is conducted to the water collector 17.
  • the activation times of the rest program P2 are detected, for example by registering the operating state of the feed pump 31, wherein a deactivation of the feed pump 31 is evaluated as the activation time of the rest program P2.
  • the control unit 20 utilizes the activation times of the rest program P2 in such a way that, when an activation time is present, the rest program P2 is initiated with a follow-up P2.1. During such a run P2.1, the circulation pump 41 in the circulation line 40 is activated, and water W is circulated through the circulation passage 40 and the first flow passage 11.
  • the control unit 20 When using a heat source 30 comprising a fuel or electricity operated heater, the control unit 20 should deviate from the illustrated variant with the heat source 30 and the heater 32nd be connected and record their operating status. A deactivation of the heat source 30 would then be evaluated as the activation time of the rest program P2.
  • the control unit 20 terminates the overrun P2.1 in accordance with a defined criterion, which is below a limit temperature at the sensor-monitored position S of the heat exchanger 10.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Claims (10)

  1. Procédé pour faire fonctionner un dispositif de distribution d'eau chaude potable (1) selon le principe du débit, comprenant un échangeur de chaleur (10), lequel possède un premier canal de débit (11) pour de l'eau potable (W) et un deuxième canal de débit (18) pour un fluide de chauffage (M) à chauffer par une source de chaleur (30),
    a) le premier canal de débit (11) étant relié hydrauliquement par le biais d'une conduite d'arrivée (14) à un raccord d'eau froide potable (15) et hydrauliquement par le biais d'une conduite de départ (16) à un point de prélèvement d'eau chaude potable (17),
    b) la conduite d'arrivée (14) étant reliée hydrauliquement par le biais d'une conduite de circulation (40) à la conduite de départ (16), une pompe de circulation (41) activable étant disposée dans la conduite de circulation (40),
    c) la source de chaleur (30) fonctionnant par phases dans un programme de chauffage (P1) et par phases dans un programme de repos (P2),
    i. lorsque le programme de chauffage (P1) est activé, la source de chaleur (30) activée chauffant le fluide de chauffage (M) et l'eau potable (W) étant conduite à travers le premier canal de débit (11) et aussi chauffée au moyen du fluide de chauffage (M) dans le premier canal de débit (11), et
    ii. lorsque le programme de repos (P2) est activé, la source de chaleur (30) désactivée ne délivrant pas de chaleur et l'eau potable (W) n'étant pas conduite vers le point de prélèvement d'eau chaude potable (17), et
    caractérisé par les étapes suivantes :
    d) détection des instants d'activation du programme de repos (P2) ;
    e) exploitation des instants d'activation du programme de repos (P2) de telle sorte qu'en cas de présence d'un instant d'activation, le programme de repos (P2) est initié avec un retard (P2.1),
    f) pendant le retard (P2.1), la pompe de circulation (41) dans la conduite de circulation (40) est activée et l'eau potable (W) est refoulée en circuit à travers la conduite de circulation (40) et le premier canal de débit (11).
  2. Procédé selon la revendication 1, comprenant l'étape suivante :
    a) activation du programme de chauffage (P1) et désactivation du programme de repos (P2) lorsque le point de prélèvement d'eau chaude potable (17) demande de l'eau (W) chauffée.
  3. Procédé selon l'une des revendications 1 ou 2, comprenant l'étape suivante :
    a) désactivation du programme de chauffage (P1) et activation du programme de repos (P2) lorsque le point de prélèvement d'eau chaude potable (17) ne demande pas d'eau (W) chauffée.
  4. Procédé selon l'une des revendications précédentes, la source de chaleur (30) comprenant un dispositif de chauffage (32) qui est activé dans le programme de chauffage (P1) et qui est désactivé dans le programme de repos (P2).
  5. Procédé selon l'une des revendications précédentes, la source de chaleur (30) étant reliée à un deuxième canal de débit (18), et le fluide de chauffage (M) pouvant être refoulé à travers le deuxième canal de débit (18) au moyen d'une pompe de refoulement (31) activable, la pompe de refoulement (31) étant activée dans le programme de chauffage (P1) et désactivée dans le programme de repos (P2).
  6. Procédé selon la revendication 5, l'état de fonctionnement de la pompe de refoulement (31) et une désactivation de la pompe de refoulement (31) étant évalués comme instant d'activation du programme de repos (P2).
  7. Procédé selon l'une des revendications 1 à 5, l'état de fonctionnement de la source de chaleur (30) et une désactivation de la source de chaleur (30) étant évalués comme instant d'activation du programme de repos (P2).
  8. Procédé selon l'une des revendications précédentes, le retard (P2.1) prenant fin conformément à un critère défini, le critère étant soit une durée d'activation définie, soit un débit volumique défini d'eau potable (W), soit encore un franchissement vers le bas d'une température limite au niveau d'au moins une position (S) surveillée par capteur de l'échangeur de chaleur (10).
  9. Procédé selon la revendication 8, la température limite étant inférieure à 60 degrés Celsius.
  10. Procédé selon l'une des revendications précédentes, la source de chaleur (30) comprenant un appareil de chauffage fonctionnant avec du combustible ou de l'électricité ou un accumulateur tampon.
EP13171166.5A 2012-07-06 2013-06-10 Procédé de fonctionnement d'un dispositif de production d'eau chaude sanitaire Not-in-force EP2682682B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012013333.2A DE102012013333A1 (de) 2012-07-06 2012-07-06 Verfahren zum Betrieb einer Trinkwarmwasser-Bereitstellungsvorrichtung

Publications (3)

Publication Number Publication Date
EP2682682A2 EP2682682A2 (fr) 2014-01-08
EP2682682A3 EP2682682A3 (fr) 2016-07-20
EP2682682B1 true EP2682682B1 (fr) 2017-10-04

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EP13171166.5A Not-in-force EP2682682B1 (fr) 2012-07-06 2013-06-10 Procédé de fonctionnement d'un dispositif de production d'eau chaude sanitaire

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EP (1) EP2682682B1 (fr)
DE (1) DE102012013333A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PT109011A (pt) * 2015-12-03 2017-06-05 Bosch Termotecnologia Sa Dispositivo para a produção de água quente
CN108413601A (zh) * 2018-05-04 2018-08-17 浙江长兴亿安贝电器有限公司 一种即热式电热水器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2214880B2 (de) 1972-03-27 1976-02-12 Robert Bosch Gmbh, 7000 Stuttgart Heizungsanlage mit einem wasserkreislauf als waermetraeger, einem insbesondere gasbeheizten wassererhitzer und einer umwaelzpumpe
DE3727442A1 (de) 1987-08-17 1989-03-02 Gerhard Urban Verfahren zur erzeugung von warmwasser und vorrichtung zur durchfuehrung dieses verfahrens
DE102004038546A1 (de) 2004-08-06 2006-03-16 Solvis Gmbh & Co. Kg Anordnung zur Bereitstellung von warmem Brauchwasser und Wärmetauscher

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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Publication number Publication date
DE102012013333A1 (de) 2014-01-09
EP2682682A3 (fr) 2016-07-20
EP2682682A2 (fr) 2014-01-08

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