EP4198412A1 - Système pour absorber l'expansion de l'eau et installation de chauffage équipée d'un tel système - Google Patents

Système pour absorber l'expansion de l'eau et installation de chauffage équipée d'un tel système Download PDF

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Publication number
EP4198412A1
EP4198412A1 EP22213311.8A EP22213311A EP4198412A1 EP 4198412 A1 EP4198412 A1 EP 4198412A1 EP 22213311 A EP22213311 A EP 22213311A EP 4198412 A1 EP4198412 A1 EP 4198412A1
Authority
EP
European Patent Office
Prior art keywords
hot water
expansion
air
water tank
water
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Withdrawn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
EP22213311.8A
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German (de)
English (en)
Inventor
Kamil Jakabovic
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 GmbH
Protherm Production sro
Original Assignee
Vaillant GmbH
Protherm Production sro
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 GmbH, Protherm Production sro filed Critical Vaillant GmbH
Publication of EP4198412A1 publication Critical patent/EP4198412A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F24H1/18—Water-storage heaters
    • F24H1/188—Water-storage heaters with means for compensating water expansion
    • 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
    • F24H9/12—Arrangements for connecting heaters to circulation pipes
    • F24H9/13—Arrangements for connecting heaters to circulation pipes for water heaters
    • F24H9/133—Storage heaters

Definitions

  • the invention comprises a system designed to absorb the expansion of water when it is heated, and a heating installation equipped with this system.
  • Expansion tanks are used in heating technology to accommodate the expansion of water.
  • Expansion tanks are pressure vessels connected to the heating system, they usually consist of a gas side filled with compressible gas (air) and separated from the water side by an elastic membrane.
  • An expansion tank prevents excessive pressure build-up in a closed system by accommodating the pressure from the increase in volume of the liquid as it heats up. When the temperature drops, it returns the liquid to the system and keeps the system overpressure within the specified limits.
  • Expansion vessels therefore require regular testing, during which the vessel must be removed from the system and, if necessary, separated by a shut-off valve and that water to be emptied from the vessel. The pressure on the gas side is measured and adjusted if necessary.
  • expansion tanks are integrated directly into the heating system, they must be regularly and professionally maintained and it is therefore necessary to solve their positioning and fastening inside the heating system s, an exemplary solution is given in the EP 3650759 B1 published.
  • expansion tanks are designed as separate outdoor units that are connected to the heating system via separable connection elements, their connection and the associated space requirement can pose a problem, especially in single-family houses.
  • expansion vessels not only reduces the space requirement but also the efficiency of the heating system, because the volume of water generated by the expansion and flowing into the expansion vessel cools down and has to be heated up again after it has been returned to the system.
  • the integration of the expansion tank, which was previously arranged separately, into the storage tank is a space-saving solution and at the same time energy-efficient, since no energy is taken from the system for heating when using the designed system.
  • the DE10033280A1 describes a system for absorbing the expansion of water induced by a heat generator or other thermal processes, which is integrated into a hot water tank or hot water heater and is equipped with an elastic hollow body filled with gas or a gas mixture, which is connected to an externally accessible gas refill valve .
  • the hollow body is preferably designed as a cushion or bag.
  • a gas cushion with a membrane is integrated into a hot water storage tank with thermal insulation, which takes on the function of an expansion tank.
  • the gas cushion can be filled or emptied via a valve.
  • the DE 202011106403 U1 describes a domestic technology with a storage tank for receiving heated water, with an expansion vessel inside the storage tank, the expansion vessel having a non-elastic hollow body with a fixed volume and a valve for connecting the inner volume of the hollow body with a volume outside the storage tank.
  • the non-elastic expansion vessel is connected to the accumulator through an opening and another opening to the outside of the accumulator ensures pressure equalization.
  • a medium oil, oil-containing medium or paraffin
  • the accumulator is provided with an expansion tank that does not require a membrane.
  • the disadvantage of the solution described is the need for a separating layer and the opening to the outside, through which impurities can penetrate into the expansion tank and the storage tank.
  • None of the present solutions provide a system for automatic replenishment of air (gas) into the gas side of the system to accommodate the expansion of the water, and in particular all solutions require some means of separating the gas cushion (gas side) from the water.
  • the system for taking up the expansion is located in the hot water tank, which is equipped with an inlet pipe and an outlet pipe.
  • the system for accommodating the expansion comprises a non-elastic hollow body with a housing, which is arranged in the hot water tank.
  • the water flows into the storage tank via the inlet pipe and the heated water is removed via the outlet pipe
  • the heating system is designed with a closed heating water circuit and therefore the water volume resulting from thermal expansion must be absorbed when the water is heated.
  • the hollow body is surrounded by a housing in order to separate its volume from the internal volume of the accumulator.
  • the housing has an opening on the underside for the water and air supply to the hollow body.
  • the housing is attached to the wall of the water heater by suitable means.
  • the hollow body is naturally filled with atmospheric air through an opening in the housing, which remains trapped there.
  • the reservoir When the reservoir is first filled with water, the water also penetrates into the hollow body, and the accumulated air is compressed in the air side that arises in the hollow body above the water level.
  • solubility tables for the gases contained in air show that their solubility in water decreases with increasing temperature and approaches zero when the liquid is heated above 40 °C. Therefore, the solubility of air in water in such an accumulator is negligible and there is no need for a separating layer or membrane between the water and the air side in the hollow body.
  • the feed line has a corresponding curvature and is routed under the opening in the housing of the hollow body.
  • the curvature helps direct any bubbles in the water directly into the hollow body.
  • means for introducing air can be included in the system. be absorbed into the water in the hot water tank.
  • the hot water tank can be equipped with a pipe that goes through the wall outside the indoor space, so that with a conventional device (e.g. a Pump) air can be refilled from outside the memory.
  • a conventional device e.g. a Pump
  • the tube has a corresponding orifice under the opening in the body of the hollow body.
  • a jet pump is a pump in which the momentum energy of a medium moving at high speed is transferred to another medium.
  • the jet pump for the air supply is driven by the water flow, so that air can be automatically refilled into the water in the hot water tank if there is an increased water withdrawal or increased water supply. In this simple way, air is automatically refilled into the air side of the hollow body when the flow rate changes.
  • air is supplied to the air side of the hollow body indirectly via the internal water volume of the hot water tank (refilling of air via the water sealing plug) via both types (pipe, jet pump).
  • the system arranged in this way to accommodate the expansion of heated water in the hot water tank is practically maintenance-free.
  • the system for absorbing the expansion of heated water is designed in particular for heating systems with a closed heating water circuit, where the heat source can be any heat source known in the art - gas, electric, heat pump, solar or combined.
  • the heating can also take place directly in the storage tank, or the heat source is connected to the storage tank via a heat exchanger.
  • the system for accommodating the expansion of heated water minimizes the heat losses of the heating system and is self-regulating in terms of pressure conditions, since the compression of the air in the air side is regulated by the water pressure in the hot water tank.
  • a separate claim protects the heating installation with a closed circuit of heated water, equipped with a hot water tank and a system for absorbing the expansion of heated water according to the submitted invention.
  • the system for accommodating the expansion of heated water is arranged in a hot water tank 10 equipped with an inlet pipe 4 and an outlet pipe 6 .
  • the system comprises a non-elastic hollow body 1 with a housing 8 containing a certain volume of water and air, the housing 8 being provided in its lower part with an opening 2 for the supply of water and air into the hollow body 1.
  • the housing 8 is welded to the inner wall of the hot water tank 10. It is arranged for the intake of air in the air side 3 of the hollow body 1, the air side 3 is above the water surface 9 of the hollow body 1.
  • the embodiments show several ways of refilling air through the internal water volume of the hot water tank, not including all the possibilities that fall under the protection claims.
  • the curved part 5 of the inlet pipe 4 is directed under the opening 2 of the housing 8 of the hollow body 1 so that air bubbles are trapped.
  • the hot water tank 10 is provided with a connection 7, which is routed through the wall outside the interior of the hot water tank 10, for mixing air into the water in the hot water tank 10.
  • the inlet line 4 is provided in the hot water tank 10 with a jet pump 11 for mixing air into the water.
  • the jet pump 11 is automatically controlled by the removal of water from the drain line 6 from the hot water tank 10 or by the inflow of water through the inlet line 4 into the hot water tank 10.
  • the described system for accommodating the expansion of heated water placed in the hot water tank 10 equipped with an inlet pipe 4 and an outlet pipe 6 is part of a closed circuit heating system for heating the water (not shown).
  • the heating takes place directly in the hot water tank 10, or the heat source is connected to the hot water tank 10 via a heat exchanger.
  • the housing of the hollow body can be made of thin and lightweight stainless material, and no elaborate means are required for its attachment inside the hot water tank, for example, attachment by welding is sufficient.
  • Any conventional hot water tank in a heating system with a closed heating water circuit can be equipped with the system described and the system is a maintenance-free and self-regulating replacement for an expansion tank.

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)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Details Of Fluid Heaters (AREA)
EP22213311.8A 2021-12-15 2022-12-14 Système pour absorber l'expansion de l'eau et installation de chauffage équipée d'un tel système Withdrawn EP4198412A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SK1842021U SK9566Y1 (sk) 2021-12-15 2021-12-15 Systém na absorbovanie expanzie vody a vykurovacie zariadenie vybavené týmto systémom

Publications (1)

Publication Number Publication Date
EP4198412A1 true EP4198412A1 (fr) 2023-06-21

Family

ID=81175240

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22213311.8A Withdrawn EP4198412A1 (fr) 2021-12-15 2022-12-14 Système pour absorber l'expansion de l'eau et installation de chauffage équipée d'un tel système

Country Status (2)

Country Link
EP (1) EP4198412A1 (fr)
SK (1) SK9566Y1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE937250C (de) * 1951-01-16 1955-12-29 Walther Feld & Co Warmwasserspeicher mit Ausdehnungsgefaess fuer Raumheizung und Warmwassererzeugung
WO1991008423A1 (fr) * 1989-11-25 1991-06-13 Ventank Products Limited Reservoir d'eau chaude cloisonne
GB2316474A (en) * 1996-08-16 1998-02-25 Imi Waterheating Ltd Waterheaters
DE10033280A1 (de) 2000-07-07 2002-01-17 Andre Laukner Vorrichtung zur Aufnahme der Wasserausdehnung
EP1630487A1 (fr) 2004-08-30 2006-03-01 Vaillant GmbH Ballon d'accumulation d'eau chaude
DE202011106403U1 (de) 2011-10-07 2013-01-09 Stiebel Eltron Gmbh & Co. Kg Haustechnikgerät
EP3650759A1 (fr) 2018-11-09 2020-05-13 Vaillant GmbH Dispositif de montage permettant de fixer la vase d'expansion

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE937250C (de) * 1951-01-16 1955-12-29 Walther Feld & Co Warmwasserspeicher mit Ausdehnungsgefaess fuer Raumheizung und Warmwassererzeugung
WO1991008423A1 (fr) * 1989-11-25 1991-06-13 Ventank Products Limited Reservoir d'eau chaude cloisonne
GB2316474A (en) * 1996-08-16 1998-02-25 Imi Waterheating Ltd Waterheaters
DE10033280A1 (de) 2000-07-07 2002-01-17 Andre Laukner Vorrichtung zur Aufnahme der Wasserausdehnung
EP1630487A1 (fr) 2004-08-30 2006-03-01 Vaillant GmbH Ballon d'accumulation d'eau chaude
DE202011106403U1 (de) 2011-10-07 2013-01-09 Stiebel Eltron Gmbh & Co. Kg Haustechnikgerät
EP3650759A1 (fr) 2018-11-09 2020-05-13 Vaillant GmbH Dispositif de montage permettant de fixer la vase d'expansion

Also Published As

Publication number Publication date
SK9566Y1 (sk) 2022-08-10
SK1842021U1 (sk) 2022-04-13

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