EP4130584A1 - Agencement de conduites à chauffage décentralisé d'eau potable et procédé permettant de faire fonctionner un agencement de conduites - Google Patents

Agencement de conduites à chauffage décentralisé d'eau potable et procédé permettant de faire fonctionner un agencement de conduites Download PDF

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Publication number
EP4130584A1
EP4130584A1 EP22188424.0A EP22188424A EP4130584A1 EP 4130584 A1 EP4130584 A1 EP 4130584A1 EP 22188424 A EP22188424 A EP 22188424A EP 4130584 A1 EP4130584 A1 EP 4130584A1
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EP
European Patent Office
Prior art keywords
line
drinking water
hot water
circulation
circulation line
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.)
Pending
Application number
EP22188424.0A
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German (de)
English (en)
Inventor
Carsten Wermter
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.)
Exergene Technologie GmbH
Original Assignee
Exergene Technologie 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 Exergene Technologie GmbH filed Critical Exergene Technologie GmbH
Publication of EP4130584A1 publication Critical patent/EP4130584A1/fr
Pending 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
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0078—Recirculation systems
    • 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
    • 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
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/14—Cleaning; Sterilising; Preventing contamination by bacteria or microorganisms, e.g. by replacing fluid in tanks or conduits
    • 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
    • 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
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/269—Time, e.g. hour or date

Definitions

  • the invention relates to a line arrangement with decentralized drinking water heating in at least one usage unit of a house with a house circulation line for cold drinking water, with at least one hot water line arranged in a usage unit and connected to the house circulation line, with a drinking water heater arranged in the hot water line and with at least one in the direction of flow behind the Drinking water heater arranged extraction point.
  • the invention also relates to a method for operating a line arrangement with decentralized drinking water heating.
  • the present invention is therefore based on the technical problem of reducing or preventing the contamination of decentrally installed drinking water heaters.
  • a circulation line is connected in the direction of flow behind the drinking water heater and connects the hot water line to the house circulation line and that a circulation pump is arranged in the circulation line.
  • the circulation line can be connected to the hot water line before the first extraction point. In this way, the line arrangement in the vicinity of the drinking water heater in particular is flushed and can be easily installed, especially when retrofitting.
  • the circulation line can also be connected to the hot water line behind the last extraction point in the direction of flow. In this case, all supply lines of the tapping points are also flushed and the exchange of hot water remaining in the supply lines is thus guaranteed.
  • a flow switch is preferably arranged in the hot water pipe.
  • the line arrangement can be monitored for flow or stagnation times and the operation of the circulation pump can be controlled as a function of the measurement signals from the flow monitor.
  • a temperature sensor can also be arranged in the hot water pipe to measure the temperature of the drinking water in the Measure hot water pipe and enable temperature monitoring.
  • a cold water line in the usage unit is advantageously connected to the house circulation line on the inlet side and to the circulation line on the outlet side. This means that the water in the cold water pipe can be exchanged in addition to the hot water pipe using the circulation pump. Since cold water pipes are often installed parallel to and at a small distance from the hot water pipes, stagnation in the cold water pipe can be avoided with little additional effort.
  • the cold water line mentioned is only optional, because the line arrangement can also be designed without an additional cold water line.
  • the drinking water heater is switched off when cold water is required and the cold water is drawn through the drinking water heater.
  • This line arrangement represents a cost-effective design for small and simple living units, for example student dorm rooms or simple hotel rooms. Because in these cases it is not a problem if the same water temperature is set for all tapping points.
  • This line arrangement is also inexpensive and can also be referred to as a single-line installation.
  • the desired tapping temperature can be set via an electronic thermostat at the respective tapping point and if the temperature is set at two different tapping points in succession, then the temperature set last would be decisive.
  • the electric drinking water heater can be informed via a wireless communication interface, in particular via Bluetooth, which temperature is currently required.
  • a domestic circulation pump is in the domestic circulation line and/or a cooling device and/or a filter unit is arranged in the domestic circulation line. These elements serve to improve the operation of the line arrangement.
  • the technical problem outlined above is also solved by a method for operating a line arrangement with decentralized drinking water heating, in which cold drinking water is supplied to a domestic circulation line, in which cold drinking water is supplied to at least one hot water line connected to a riser of the domestic circulation line, in which the drinking water is Hot water line is heated during a first time interval and at least partially removed and in which the drinking water is discharged in the hot water line during a second time interval through a circulation line in the domestic circulation line.
  • the method described can reduce water stagnation for too long and in particular the occurrence of unwanted contamination by germs in the drinking water heater.
  • a third time period in which the drinking water is neither heated nor circulated.
  • the order of the individual time intervals is arbitrary and can be divided by a controller.
  • the period of time after the end of a first time interval with removal of hot water is preferably measured and after a predetermined length of time has been exceeded, the drinking water in the hot water line is at least partially discharged via the circulation line during a second time interval.
  • a circulation of a second time interval is not necessarily carried out after each first time interval if two first time intervals follow one another within a sufficiently short period of time. Only when the temporal Distance to the first time interval is too large, a circulation is carried out in a second time interval.
  • the length of the time span after a first time interval can be measured using a clock and the circulation can be triggered after a preset value has been reached.
  • the end of a first time interval can be determined by measuring the flow rate in the hot water pipe and the measurement of the time period can be triggered.
  • the temperature of the drinking water in the hot water pipe it can be determined when a circulation of a second period of time is triggered. So if the temperature in the hot water pipe falls below a specified value, the measurement of the time span is triggered. If the temperature is lower than a specified temperature for a specified period of time, then this is an indication that there is stagnation without reheating of the drinking water and a second time interval with circulation of the drinking water in the hot water pipe should take place.
  • the line arrangement described and the method for operating the line arrangement thus serve to ensure drinking water hygiene with decentralized drinking water heating in the usage unit, which is used as a home, office, workshop or the like. Therefore, safe hygiene conditions can be guaranteed even with longer downtimes.
  • FIG. 1 shows a first exemplary embodiment of a line arrangement 2 according to the invention with decentralized drinking water heating in at least one usage unit 4 of a house.
  • a domestic circulation line 6 with a riser and a return line for cold drinking water is installed in the house, which is connected to a cold water house connection 8 .
  • a hot water line 10 connected to the house circulation line 6 is connected, in which a drinking water heater 12 is arranged in the form of a flow heater.
  • a drinking water heater 12 is arranged in the form of a flow heater.
  • an extraction point 14 is provided, from which the heated drinking water can be removed.
  • the hot water pipe 10 thus initially carries cold drinking water, starting from the house circulation pipe 6 , which is heated in the drinking water heater 12 and is then routed to the extraction point 14 .
  • a cold water line 16 is connected to the house circulation line 6 and carries cold drinking water to the tapping point 14, which can be mixed with the hot water.
  • a circulation line 18 is connected in the direction of flow behind the drinking water heater 12 and connects the hot water line 10 to the house circulation line 6. Furthermore, a circulation pump 20 is arranged in the circulation line 18 to circulate the drinking water through the hot water line 10, through the drinking water heater 12 and through to generate the circulation line 18 through. This results in an exchange of the drinking water within the drinking water heater 12 and the occurrence of contamination by germs or by deposits of lime or other residues is reduced or even avoided.
  • How 1 further shows that the circulation line 18 is connected to the hot water line 10 upstream of the extraction point 14 in the direction of flow. This position is arranged relatively close to the drinking water heater 12, so that primarily the drinking water from the drinking water heater 12 is exchanged. This configuration has the particular advantage that subsequent installation is made easier and the installation effort is reduced.
  • a flow switch 22 is also shown, which is arranged in the hot water line 10 on the route to the tapping point 14.
  • the flow monitor 22 detects the flow through the hot water line 10 to the tapping point 14 and thus indicates the time interval in which hot water is removed, the drinking water heater 12 is so in operation.
  • the measurement signals are transmitted to the controller of the circulation pump 20 by a data transmission path that is not shown.
  • a first time interval for drawing off hot water certainly.
  • the control of the circulation pump 20 is also set in such a way that the circulation pump 20 is switched on for pumping the water during a second time interval, as a result of which the circulation through the circulation line 10 is generated.
  • the duration of the second time interval is predetermined and can be adjusted depending on the system, in particular depending on the length of the lines.
  • a clock is used to measure the period of time after the end of a last drawing of hot water from the hot water pipe 10, ie after the first time interval. If the control of the circulation pump 20 detects a period of time greater than a predetermined period of time, the circulation pump 20 is switched on for a second time interval. In this way, the circulation of the water in the circulation line is generated in interval operation and the spread of germs is prevented.
  • a signaling contact can also be used.
  • the controller can have a signaling contact that indicates when the drinking water heater 12 is in operation.
  • the circulation pump 20 is switched off. As soon as the drinking water heater 12 goes out of service, the period of time can be measured for how long the drinking water heater 12 is switched off.
  • the cold water line 16 is connected to the house circulation line 6 on the input side and to the circulation line 18 on the output side.
  • the circulation pump 20 is actuated, not only the hot water line 10 but also the cold water line 16 is flushed.
  • the flows can be controlled in a targeted manner, in which the outlet side of the cold water line 16 can be closed and opened with a valve.
  • the cold water line 16 may not be a line from the cold water line 16 to the circulation line 18 on the outlet side, and the cold water line 16 ends at the extraction point 14.
  • a house circulation pump 24 is arranged in the house circulation line 6 in order to keep the circulation in the house circulation line 6 upright.
  • a filter unit 26 in the form of an ultra-filter is arranged in the domestic circulation line 6 in order to remove dirt and possibly also germs from the circulating water.
  • the filter unit is preferably designed as an ultrafiltration unit.
  • a cooling device 28 is arranged in the domestic circulation line 6 in order to cool the returning drinking water. A constant temperature of the drinking water in the circulation line 6 can thus be ensured.
  • FIG 2 shows a further exemplary embodiment of a line arrangement 2, which is similar to the exemplary embodiment according to FIG 1 is designed and in which the same reference numerals identify the same components.
  • a cold water line 16 is also provided, which supplies both tapping points 14a and 14b with cold drinking water and is connected to the circulation line 18 downstream of the tapping point 14b.
  • the flows can be controlled in a targeted manner, in which the outlet side of the cold water line 16 after the last Removal point 14b can be closed and opened with a valve.
  • outlet-side line from the cold water line 16 into the circulation line 18 may not be present and the cold water line 16 ends at the extraction point 14b.
  • a temperature sensor 30 is arranged in the hot water pipe 10 .
  • the control of the circulation pump 20 can then, on the basis of the measured temperature values of the temperature sensor 30 , determine the point in time from when the drinking water has to circulate again in the hot water line 10 .
  • the drinking water can initially be heated by the drinking water heater 12 during a first time interval dependent on the user. After the end of the first time interval, the temperature in the hot water line 10 is then monitored over a predetermined period of time, for example one hour, to determine whether a predetermined temperature value has been exceeded. Exceeding the temperature value before the time period has expired indicates that a new first time interval with the production of hot drinking water has taken place. If the period of time is exceeded and the temperature has remained below the preset temperature, this is an indication that the drinking water has not been heated again and that the circulation pump 20 must be switched on in order to circulate the drinking water in the hot water pipe 10 and 10 during a second time interval to generate the circulation line 18.
  • a predetermined period of time for example one hour
  • a value of 30°C can be assumed as the limit value for the hot water temperature to be maintained.
  • the circulation pump 20 can then be switched on for a period of 5 minutes, for example, if it has been determined via a signaling contact, a flow monitor or a temperature sensor (e.g. T ⁇ 30°C) that the drinking water heater 12 has not been used for more than 4 hours, for example, or .the temperature is too low. So that there is no permanent stagnation in the circulation line 18, it is advantageous to switch on the circulation pump 20 at least twice a day.
  • a flow monitor or a temperature sensor e.g. T ⁇ 30°C
  • the 3 and 4 show two simplified versions corresponding to the two 1 and 2 .
  • both 3 and 4 are the cold water lines 16 compared to the 1 and 2 been omitted.
  • the usage unit 4 is only supplied via the water line 10 and the desired water temperature at the taps 14 or 14a and 14b is the same.
  • the drinking water heater 12 is switched off.
  • This arrangement is particularly suitable for small and simple usage units 4, is inexpensive and can also be referred to as a single-line installation.

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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)
  • Fluid Mechanics (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
EP22188424.0A 2021-08-05 2022-08-03 Agencement de conduites à chauffage décentralisé d'eau potable et procédé permettant de faire fonctionner un agencement de conduites Pending EP4130584A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021120396.1A DE102021120396A1 (de) 2021-08-05 2021-08-05 Leitungsanordnung mit dezentraler Trinkwassererwärmung und Verfahren zum Betrieb einer Leitungsanordnung

Publications (1)

Publication Number Publication Date
EP4130584A1 true EP4130584A1 (fr) 2023-02-08

Family

ID=82786399

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22188424.0A Pending EP4130584A1 (fr) 2021-08-05 2022-08-03 Agencement de conduites à chauffage décentralisé d'eau potable et procédé permettant de faire fonctionner un agencement de conduites

Country Status (2)

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EP (1) EP4130584A1 (fr)
DE (1) DE102021120396A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2883844A1 (fr) * 2013-12-12 2015-06-17 GTS Green Technology Solutions GmbH Système et procédé de préparation d'eau
DE202014103193U1 (de) * 2014-07-11 2015-07-15 Better Place GmbH Zirkulationsleitung für Kaltwasser
EP3705789A1 (fr) * 2019-03-07 2020-09-09 Gebr. Kemper GmbH + Co. KG Metallwerke Système d'alimentation en eau et son procédé de fonctionnement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4672990A (en) 1985-10-11 1987-06-16 Robillard Fred W System for freeze protection of pipes
EP3241950A4 (fr) 2014-12-30 2018-10-03 Aquareturn, S.L. Dispositif et installation d'eau pour prévenir la prolifération d'êtres vivants dans les conduits d'eau
DE102015118826A1 (de) 2015-11-03 2017-05-04 Solvis GmbH Anordnung und Verfahren zur Bereitstellung von warmem Trinkwasser mit einem Wärmeübertrager

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2883844A1 (fr) * 2013-12-12 2015-06-17 GTS Green Technology Solutions GmbH Système et procédé de préparation d'eau
DE202014103193U1 (de) * 2014-07-11 2015-07-15 Better Place GmbH Zirkulationsleitung für Kaltwasser
EP3705789A1 (fr) * 2019-03-07 2020-09-09 Gebr. Kemper GmbH + Co. KG Metallwerke Système d'alimentation en eau et son procédé de fonctionnement

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DE102021120396A1 (de) 2023-02-09

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