EP3885668A1 - Dispositif de production d'eau chaude - Google Patents

Dispositif de production d'eau chaude Download PDF

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Publication number
EP3885668A1
EP3885668A1 EP21164696.3A EP21164696A EP3885668A1 EP 3885668 A1 EP3885668 A1 EP 3885668A1 EP 21164696 A EP21164696 A EP 21164696A EP 3885668 A1 EP3885668 A1 EP 3885668A1
Authority
EP
European Patent Office
Prior art keywords
heat source
water
heat
der
inlet
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.)
Withdrawn
Application number
EP21164696.3A
Other languages
German (de)
English (en)
Inventor
Peter Krimbacher
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.)
Ovum Heiztechnik GmbH
Original Assignee
Ovum Heiztechnik 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 Ovum Heiztechnik GmbH filed Critical Ovum Heiztechnik GmbH
Publication of EP3885668A1 publication Critical patent/EP3885668A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • F24H4/04—Storage heaters
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/08—Electric heater
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F24D2200/123—Compression type heat pumps
    • 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
    • F24D2240/00—Characterizing positions, e.g. of sensors, inlets, outlets
    • F24D2240/26—Vertically distributed at fixed positions, e.g. multiple sensors distributed over the height of a tank, or a vertical inlet distribution pipe having a plurality of orifices

Definitions

  • the invention relates to a device for heating water according to the preamble of claim 1.
  • Such a device is used, for example, for decentralized hot water preparation in multi-party properties in connection with a centralized heat supply to cover building heating requirements via decentralized heating surfaces such as radiators or underfloor heating.
  • the device has a hot water storage tank which is coupled to a heat pump which comprises a heat pump circuit.
  • a heat pump which comprises a heat pump circuit.
  • an evaporator is provided, the mode of operation of which depends heavily on the inlet temperature of the heat source. If the inlet temperature exceeds a limit value that is decisive for the operation of the evaporator, the operational reliability of the heat pump is impaired and the compressor and other components of the heat pump can even fail due to excessive inlet temperatures.
  • a device for hot water preparation is created, which has a water reservoir, in particular in the form of a circular cylindrical or oval jacket provided with a dished bottom, which is connected to an integrated heat pump, which with the expenditure of technical work, thermal energy in an evaporator Heat pump from the heat source, in particular in the form of a liquid medium, such as water from the building heating system, takes up at a low temperature and feeds this as useful heat to the water storage tank together with drive energy via a condenser.
  • a mixing valve is provided according to the invention.
  • This mixing valve is integrated in the device and for this purpose is arranged in particular between the heat source inlet and a circulating pump of the heat pump circuit.
  • the heat source inlet can be, for example, a distributor of a heating system, in particular underfloor heating, which feeds liquid medium, in particular in the form of water, into the device and represents the heat source of the heat pump so that the heat pump can be operated properly.
  • the construction of the device according to the invention for heating water initially results in the advantage that the device according to the invention can be used better in different building systems. If, for example, a building heating system (heat source circuit) is above the temperature of 35 ° C, which is usually defined as critical, the heat pump of the device according to the invention runs optimally and reliably thanks to the integrated mixing valve. This is in contrast to conventional hot water heat pumps, which use the building's heating system as a heat source circuit, so when planning it must be ensured that the often maximum permissible temperature of 35 ° C is not exceeded.
  • a mixing valve was often installed externally in known devices. The disadvantage of such an arrangement can be seen in the fact that it causes more time and costs and that one is dependent on correct planning of the water heating device. According to the construction according to the invention, which provides a mixing valve integrated into the heat source circuit, this risk can be eliminated.
  • the device according to the invention has the advantage that more hot water can be made available in comparison with known devices of the same storage size. There is little space in residential units, especially in small apartments.
  • the construction according to the invention makes it possible to optimize the device according to the invention in such a way that more hot water can be drawn from the same storage tank size and that the device can be installed in a more compact manner. It is thus possible with the device according to the invention to be able to arrange it even above existing machines, in particular washing machines.
  • the water reservoir of the device according to the invention can preferably have a cylindrical or oval jacket, which is connected to a dished bottom via a preferably rounded transition area.
  • This transition area can An electric heating element can be arranged, which has the advantage that the entire jacket of the water tank can be surrounded by the condenser, which has the further advantage that the electric heating element is easily accessible and thus, for maintenance or replacement work, on the side in a simple manner can be expanded from the water reservoir.
  • the device according to the invention it is possible to provide two temperature sensors for detecting the water temperature in the storage tank.
  • one of the temperature sensors is arranged in the area (at the level) of the condenser surrounding the water reservoir and a second temperature sensor is arranged above the condenser.
  • the provision of two temperature sensors results in the possibility that one of the temperature sensors can be positioned very deep in the area of the capacitor.
  • the advantage of this arrangement is that even after a very small amount of hot water has been withdrawn from the storage tank, the lower temperature sensor located at the level of the condenser detects this hot water extraction and accordingly the storage tank can be quickly recharged. If the device according to the invention is provided, for example, with a storage tank for 160 liters of hot water, the aforementioned determination is already possible after 30 liters have been withdrawn. The resulting advantage can be seen in the fact that the heat pump can immediately start recharging and a user of the device according to the invention thus always has an almost full memory available.
  • the particularly preferred embodiment of the device according to the invention described above, in which the first temperature sensor is arranged at the level of the condenser and the second temperature sensor above the condenser, results in the advantageous possibility that the heat pump, although after an already small amount of hot water has been withdrawn via the temperature sensor at the height of the condenser is activated, but this activation takes place with a reduced setpoint if the upper temperature sensor above the condenser is still in hot water.
  • the resulting advantage is immediate reloading, different target / setpoint values depending on the requirements via the two temperature sensors and the resulting smooth operation of the device according to the invention.
  • the provision of two temperature sensors also has the advantage that the electrical heating element, which is advantageously arranged in the transition area between the jacket and the dished bottom, can be controlled independently of the heat pump.
  • the electrical heating element which is advantageously arranged in the transition area between the jacket and the dished bottom, can be controlled independently of the heat pump.
  • This independent regulation which is possible due to the arrangement described above, allows the electric heating element to be positioned lower, since regulation is ensured independently via the higher-positioned upper temperature sensor.
  • This maximally deep positioning preferably in the transition of the dished bottom, also has the advantage that the hot water storage tank is a fully-fledged electric storage tank even with a defective heat pump.
  • the previously described compactness of the device according to the invention also results from the advantageous arrangement of the connections relating to the heat source inlet and the heat source outlet adjacent to the dished bottom according to a particularly preferred embodiment of the invention.
  • this device can be arranged over machines that are present in an apartment, such as a washing machine, since in this case it can be mounted with a minimal distance from the ceiling.
  • all connections are led downwards, into the area of the dished bottom, and that all components, such as in particular pumps, compressors, mixing valves, etc., can be arranged in such a way that they are serviced from the front of the device according to the invention without having to remove the side cover to access these components.
  • the arrangement of the heat source inlet and the heat source outlet adjacent to the dished bottom has the advantage that operating elements of the device according to the invention can be arranged in the middle (at a height of approximately 70 cm).
  • the device according to the invention can be operated well both standing on the floor and also with an elevated installation, for example above a washing machine.
  • the only schematically greatly simplified figure of the drawing shows a device 1 for heating water.
  • This device 1 can be used, for example, for decentralized hot water preparation in connection with a central heating system and decentralized heating surfaces, in particular underfloor heating.
  • the device 1 has a water reservoir 2, which in particular has a cylindrical jacket 13 which is provided with a dished bottom 14. This dished bottom 14 is connected to the cylindrical or oval jacket 13 via a preferably rounded transition area 15.
  • the device 1 has a heat pump 3 which comprises a heat source circuit 4.
  • This heat source circuit 4 has a heat source inlet 5, an adjoining circulating pump 6, seen in the direction of flow R through the heat source circuit 4, and an adjoining evaporator 7 to which a heat source outlet 11 adjoins.
  • the evaporator 7 is followed by a heat pump circuit with a compressor 8 and a condenser 9, which surrounds at least a lower region of the water reservoir 2.
  • the heat pump circuit has an expansion device 10, in particular in the form of an expansion valve.
  • the heat source inlet 5 and the heat source outlet 11 are arranged adjacent to the dished bottom 14, i.e. at the foot of the water storage tank 2, which facilitates the accessibility of the heat source inlet 5 and the heat source outlet 11, for example for maintenance work or connection work between the device 1 and the building's heating system .
  • the figure also shows that, viewed in the direction of flow R, a mixing valve 12 is integrated between the heat source inlet 5 and the circulating pump 6 in the heat source circuit 4.
  • This mixing valve 12 makes it possible to limit the maximum inlet temperature of the liquid medium, for example the water from underfloor heating, into the evaporator 7, since water from the heat source inlet 5 and cooled water from the evaporator 7 can be mixed through this mixing valve 12, so that it is possible is to functionally limit the temperature level of the liquid medium fed to the evaporator 7.
  • the mixing valve 12 can be provided with an integrated control system, which enables the cooled water to be sucked in from the evaporator 7, preferably via a branch line 11B branching off from the heat source outlet line 11A.
  • the device 1 according to the invention is preferably provided with an electrical heating element 16.
  • this electrical heating element 16 is arranged in a transition region 15 between a jacket 13 and a dished bottom 14 of the water reservoir 2.
  • this electrical heating element 16 is accordingly not installed vertically in the lower storage area, in particular the dished bottom of the water storage tank 2, but deviating from the vertical up to the horizontal, which results in the advantage that the entire storage jacket of the water storage tank 2 can be surrounded by the condenser 9 and that the electrical heating element 16 is easily accessible from the side for maintenance or replacement work.
  • the figure also shows that the device 1 according to the invention is provided with two temperature sensors T1, T2.
  • the temperature sensor T1 is arranged in the water storage tank 2 or on the storage jacket 13 in the area of the condenser 9 and the temperature sensor T2 is arranged above the condenser 9. This has the advantage that separate setpoints for requesting the heat generator in the form of the heat pump 3 and / or the electric heating element 16 can be recorded.
  • the advantage of a larger amount of water available is particularly associated with the two temperature sensors T1 and T2 and, in electrical operation, with the lower-positioned electrical heating element 16 (heating rod).
  • the mixing valve 12 is mainly used for flexible use, since safe operation of the device according to the invention is to be ensured with almost all types of building heating systems.
  • a display can furthermore be positioned in such a way that operation is possible both with a hanging installation and with a standing installation on the floor, namely in the middle and not, as usual, in the upper quarter of the device.
  • the advantage of a higher amount of hot water is achieved in particular through better storage management, in which the two temperature sensors T1 and T2 enable the heat pump (3) to be activated more quickly. Furthermore, the electrical heating element (16) is positioned lower and the two temperature sensors T1 and T2 can control the heat pump (3) and the electrical heating element (16) separately. Finally, higher achievable maximum storage water temperatures are possible by limiting the heat source circuit (4) through the mixing valve (12).

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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)
EP21164696.3A 2020-03-26 2021-03-24 Dispositif de production d'eau chaude Withdrawn EP3885668A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202020101625.3U DE202020101625U1 (de) 2020-03-26 2020-03-26 Vorrichtung zur Warmwasserbereitung

Publications (1)

Publication Number Publication Date
EP3885668A1 true EP3885668A1 (fr) 2021-09-29

Family

ID=70469510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21164696.3A Withdrawn EP3885668A1 (fr) 2020-03-26 2021-03-24 Dispositif de production d'eau chaude

Country Status (2)

Country Link
EP (1) EP3885668A1 (fr)
DE (1) DE202020101625U1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT507710A1 (de) * 2008-11-13 2010-07-15 Vkr Holding As Einrichtung zur wärmegewinnung
EP2299202A2 (fr) * 2009-09-17 2011-03-23 Panasonic Corporation Radiateur à eau chaude de type pompe thermique
DE102013003206A1 (de) * 2013-02-26 2014-08-28 Franz Maierhofer Fernwärmeübergabevorrichtung für ein Gebäude sowie Fernwärmesystem zur Versorgung von Gebäuden mit Wärmeenergie
FR3029274A1 (fr) * 2014-11-28 2016-06-03 Atlantic Industrie Sas Chauffe-eau a accumulation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT507710A1 (de) * 2008-11-13 2010-07-15 Vkr Holding As Einrichtung zur wärmegewinnung
EP2299202A2 (fr) * 2009-09-17 2011-03-23 Panasonic Corporation Radiateur à eau chaude de type pompe thermique
DE102013003206A1 (de) * 2013-02-26 2014-08-28 Franz Maierhofer Fernwärmeübergabevorrichtung für ein Gebäude sowie Fernwärmesystem zur Versorgung von Gebäuden mit Wärmeenergie
FR3029274A1 (fr) * 2014-11-28 2016-06-03 Atlantic Industrie Sas Chauffe-eau a accumulation

Also Published As

Publication number Publication date
DE202020101625U1 (de) 2020-04-03

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