EP2652415A1 - Chauffe-eau - Google Patents

Chauffe-eau

Info

Publication number
EP2652415A1
EP2652415A1 EP11848400.5A EP11848400A EP2652415A1 EP 2652415 A1 EP2652415 A1 EP 2652415A1 EP 11848400 A EP11848400 A EP 11848400A EP 2652415 A1 EP2652415 A1 EP 2652415A1
Authority
EP
European Patent Office
Prior art keywords
water heater
container
water
insulation
pressure
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Withdrawn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
EP11848400.5A
Other languages
German (de)
English (en)
Other versions
EP2652415A4 (fr
Inventor
Bengt Stenvinkel
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.)
Ratanjafabrikema AB
Original Assignee
Ratanjafabrikema AB
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 Ratanjafabrikema AB filed Critical Ratanjafabrikema AB
Publication of EP2652415A1 publication Critical patent/EP2652415A1/fr
Publication of EP2652415A4 publication Critical patent/EP2652415A4/fr
Withdrawn legal-status Critical Current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
    • F24D19/0095—Devices for preventing damage by freezing
    • 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
    • F24H1/181—Construction of the tank
    • 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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters
    • F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
    • 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
    • F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F24H1/208—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes with tubes filled with heat transfer fluid

Definitions

  • the present invention relates to a water heater comprising an outer shell or casing with an insulation positioned inside it and a fluid-tight, elastic container for water interiorly in the insulation.
  • Water heaters intended for example for pleasure craft and camper vehicles etc. are often subjected to pressure shocks or hammers on opening and closing of faucets and taps, on start and stop of supply pumps or the like. These pressure shocks may be so powerful that fatigue failures may occur in the interior, stainless steel pressure vessel already after quite short periods of time.
  • USPS 5,555,997 discloses a water heater with a rigid outer shell and interiorly therein a flexible inner container which comes into contact with the water of the water heater.
  • the inner container may consist of a plurality of layers, of which one insulating layer, and has in its bottom a pressure compensating cushion. The risk of freezing fractures during winter storage of the water heater according to this US Patent Specification is imminent unless it is as good as completely emptied.
  • the present invention has for its object to design the water heater described by way of introduction such that it possesses a superior ability to withstand large pressure oscillations during operation and wholly obviate the risk of frost cracking on winter storage.
  • the water heater described by way of introduction is characterised in that the elasticity is so great that, on opening of a faucet in the water system to which the water heater is connected, the volume of the container is reduced by the expulsion of water by at least 8 % compared with a completely filled container.
  • Fig. 1 is a longitudinal cross section through a water heater according to the present invention
  • Fig. 2 is a section corresponding to Fig. 1, but in a state where its elastic container has been pressure relieved and has contracted;
  • Fig. 3 is a section taken along the section line A-A in Fig. 2.
  • the water heater according to the present invention has an outer shell or casing 1 which may be manufactured from a simple and economical material, only if it is dimensioned to withstand the working pressure at which the water heater is intended to work and with a requisite safety margin, as well as in addition such pressure oscillations or peaks as may occur.
  • One usable material may be common, so-called sheet iron or plastic, since it does not come into contact with any water.
  • the wall material need not be completely leakproof, since inside the outer casing there is a thermal insulation 2 and interiorly therein an elastic and completely fluid-tight container 6, which via the insulation transfers the pressure to the outer casing. Even an outer casing of mesh material could fulfil this function.
  • thermal insulation 2 which may consist of a foamed material and which covers substantially the whole of the inside of the outer casing 1. Even if the thermal insulation is to some degree protected from the action of pressure oscillations, it should display good mechanical strength, in particular against compression, which is attained if it has a density of at least 100 kg/m 3 , preferably 120 kg/m 3 . As a result, the risk that the insulation 2 be mechanically crumbled is avoided.
  • the insulation 2 has been shown as of uniform thickness, but according to the present invention it is possible, for example, to make the thermal insulation thicker in the upper regions of the water heater, since the temperature there may be expected to be higher if the assembly position of the water heater is determined beforehand.
  • the outer casing 1 has an assembly flange, "manhole" 3, which defines a port 4.
  • the assembly flange 3 serves for securing an assembly plate 5 which, in turn, supports or has connections to the safety and heating components which are to be located interiorly in and exteriorly on the water heater.
  • the fluid-tight container 6 is, according to the invention, resilient, preferably elastic and may thereby compensate for pressure oscillations which are caused by starting and stopping of a pump or the opening and closing of a faucet.
  • the container strives, when the pressure is relieved, to reassume its original volume, which is less than the inner volume of the insulation and by such means expels, on winter draining, a sufficient amount of water to compensate for the volume increase of the water in the event of freezing.
  • the fluid-tight container 6 is manufactured as a rubber sack of suitable rubber quality.
  • This rubber sack has a collar 7 which is sealingly clamped between the assembly flange and the mounting plate 5.
  • the elasticity in the container 6 is sufficient for at least 8 %, ideally considerably more, of the enclosed water volume to be expelled as soon as any faucet is opened in the water system to which the water heater is connected.
  • the water heater according to the present invention should preferably be mounted recumbent, i.e. with its central longitudinal axis approximately horizontal, since a partly contracted inner container 6 will then lie loosely on the inside of the insulation 2 with expansion room in both the lateral and vertical directions.
  • Figs. 2 and 3 illustrate the water heater where the elastic container has been pressure- relieved and has contracted.
  • the container is shown by broken lines under reference numeral 6', while the container in Fig. 3 is shown by solid lines.
  • the container 6' has collapsed so that it rests on the upper side of the insulation 2, while on the upper side of the container and at its end there are large free volumes 16 and 17, respectively.
  • the container displays such thickness/stability that its walls will not, under the action of the pressure from enclosed water in the unstretched state, collapse and be forced out into contact with the inside of the insulation 2.
  • the container, in the non-stretched state is so configurationally stable that free volumes 18 are also to be found on both sides of the container, i.e. far down towards that region which rests on the inside of the insulation 2.
  • the consistency of the insulation 2 is sufficiently hard for the insulation to be able to transfer that pressure which the fluid-tight container 6 exercises, to the outer casing 1.
  • a heating loop 8 which is connected for example to the cooling water system of an engine or to solar heating panels.
  • an inlet conduit 9, of larger calibre than the outlet conduit so that the speed of flow of incoming water will be low with limited turbulence and which with the aid of a sinker 10 discharges at the bottom of the water heater.
  • an outlet conduit 1 1 which, with the aid of a float 12, is held in the region of the upper wall of the water heater where the water is hottest. Since an elastic inner container 2, on emptying, draws together and contracts to a considerable extent, the inlet conduit 9 and the outlet conduit 1 1 must be manufactured from a flexible material so that they can accompany the movements which the inner container 6 undergoes on pressure release. The same applies to the heating loop 8 unless this is mounted closer to the centre axis of the water heater.
  • mixer faucets On the outside of the assembly plate 5, there are, for example, mixer faucets, safety valve, pressure guard and water connections as well as connections to an electric traditional heating element 13 or preferably one of Peltier-type.
  • this space 14 drawn between the outside of the container 6 and the inside of the insulation 2.
  • This space may be at atmospheric pressure and thus be in communication with the ambient surroundings, in which event a throttling in this communication may give a damping of the movements which the container 6 may carry out under the action of pressure oscillations.
  • the space may be closed and thus not in communication with the ambient atmosphere, in which event the air which is enclosed there will operate as a gas spring for compensation of pressure oscillations.
  • this space 14 may be pressurised via an inlet 15 if this is deemed necessary.
  • this can move and stretch in response pressure shocks without suffering any damage. Excess pressure in the space 14 may also be used for emptying the water heater before winter storage.
  • the present invention it is also possible to reduce or wholly eliminate the space 14, on condition that the container 6 consists of the above-mentioned resiliently yieldable material and moreover the insulation 2 is designed as being slightly resilient or compressible.
  • a water heater designed in the above described manner may be considered as freeze-proof, since there is an expansion space in which can be accommodated the volume increase which occurs in the event of freezing of water interiorly in the container 6.

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)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

L'invention concerne un chauffe-eau ayant un carter ou coque externe (1) avec une isolation intérieure (2) et un contenant élastique (6) pour l'eau à l'intérieur de celui-ci. À une pression de service normale, le contenant (6) remplit sensiblement l'espace dans l'isolation (2). L'élasticité au niveau du contenant (6) est suffisante pour, lors de l'ouverture d'un robinet dans un système d'eau auquel le chauffe-eau est raccordé, expulser un volume d'eau de sorte que le volume du contenant, par comparaison au contenant entièrement rempli, est réduit d'au moins 8 %.
EP11848400.5A 2010-12-13 2011-12-13 Chauffe-eau Withdrawn EP2652415A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1001186 2010-12-13
PCT/SE2011/000227 WO2012082042A1 (fr) 2010-12-13 2011-12-13 Chauffe-eau

Publications (2)

Publication Number Publication Date
EP2652415A1 true EP2652415A1 (fr) 2013-10-23
EP2652415A4 EP2652415A4 (fr) 2016-12-07

Family

ID=46244962

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11848400.5A Withdrawn EP2652415A4 (fr) 2010-12-13 2011-12-13 Chauffe-eau

Country Status (2)

Country Link
EP (1) EP2652415A4 (fr)
WO (1) WO2012082042A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPG20130005A1 (it) * 2013-02-08 2014-08-09 Matteo Tosti Serbatoio di accumulo di liquido riscaldato tramite un generatore di calore e caratterizzato dall'integrazione di un vaso di espansione a pressione costante.
CN110332703A (zh) * 2014-01-27 2019-10-15 仲从宝 活塞底小口大的储水式热水全排出电热水器
CN109990473A (zh) * 2018-01-03 2019-07-09 青岛经济技术开发区海尔热水器有限公司 一种电热水器
CN110285569A (zh) * 2019-04-26 2019-09-27 张国勋 不用电的小厨宝
CN110160257A (zh) * 2019-05-28 2019-08-23 广东万博电气有限公司 一种安全通用型电热水器
CN110657570B (zh) * 2019-09-25 2021-03-19 台州市迪欧电器有限公司 一种使用灵活的热水器水箱

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2038511A5 (fr) * 1969-03-18 1971-01-08 Olaer Patent Co
FR2390680A1 (fr) * 1977-05-11 1978-12-08 Vidalenq Maurice Perfectionnement apporte aux chauffe-eau electriques a accumulation
DE3040450C2 (de) * 1980-10-27 1987-10-01 Horst Dr.-Ing. 8000 München Pichert Vorrichtung zum Volumenausgleich für einen Warmwasserbereiter
FR2566101A1 (fr) * 1984-03-06 1985-12-20 Gouyou Beauchamps Jacques Chauffe-eau electrique
AT385588B (de) * 1984-08-02 1988-04-25 Eder Anton Gmbh Verfahren zur herstellung eines heisswasserspeichers und nach diesem verfahren hergestellter heisswasserspeicher
US5501012A (en) * 1994-02-14 1996-03-26 Southcorp Water Heaters Usa, Inc. Tank lining method
US5555997A (en) * 1994-02-14 1996-09-17 Southcorp Water Heaters Usa, Inc. Pressure compensating water heater
MY132844A (en) * 1997-02-28 2007-10-31 Fibalogic Proprietary Ltd A water geyser assembly
US7013925B1 (en) * 2004-11-18 2006-03-21 Shurflo, Llc Accumulator tank assembly and method

Also Published As

Publication number Publication date
EP2652415A4 (fr) 2016-12-07
WO2012082042A1 (fr) 2012-06-21

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