EP0832400B1 - Durchlauferhitzer - Google Patents

Durchlauferhitzer Download PDF

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Publication number
EP0832400B1
EP0832400B1 EP96919519A EP96919519A EP0832400B1 EP 0832400 B1 EP0832400 B1 EP 0832400B1 EP 96919519 A EP96919519 A EP 96919519A EP 96919519 A EP96919519 A EP 96919519A EP 0832400 B1 EP0832400 B1 EP 0832400B1
Authority
EP
European Patent Office
Prior art keywords
pipe
heater according
flow heater
result
overall
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.)
Expired - Lifetime
Application number
EP96919519A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0832400A1 (de
Inventor
Francesco Illy
Matthias Hell
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.)
Creaholic SA
Original Assignee
Creaholic SA
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 Creaholic SA filed Critical Creaholic SA
Publication of EP0832400A1 publication Critical patent/EP0832400A1/de
Application granted granted Critical
Publication of EP0832400B1 publication Critical patent/EP0832400B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F24H1/10—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
    • F24H1/12—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 in which the water is kept separate from the heating medium
    • F24H1/14—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 in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/16—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 in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form helically or spirally coiled
    • F24H1/162—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 in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form helically or spirally coiled using electrical 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
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/0042—Cleaning arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G5/00—Cleaning by distortion

Definitions

  • the invention relates to a water heater according to the preamble of the first Claim.
  • the instantaneous water heater according to the invention can in particular can be used to heat water in coffee machines.
  • the massive electric heating block of conventional coffee machines namely has a large heat capacity and a relative small heating surface so that a large amount of heating energy is supplied to it to heat it up at all, and heating up the massive electric heating block and the water takes a long time, typically longer than 45 s.
  • the invention has for its object liquids in a tube heat a desired temperature, precipitating solid precipitates avoided on the inside of the pipe or without additional Work and material expenses reversed or made more difficult or slowed down shall be.
  • the device is said to be producible using known methods and in known applications, such as in a coffee machine, be usable without the basic sequence of applications change.
  • the object is achieved by the instantaneous water heater according to the invention, as defined in the claims. If there are solid breakdown products from the heated liquid on the inner wall of the inventive Water heater tube, so they will be back after a short time at least partially detached and carried away by the liquid.
  • Instantaneous water heaters either do not calcify at all or slow down as a known instantaneous water heater and can be used, for example, in coffee machines be used.
  • the limescale detachment is caused by movements and / or deformation of the Instantaneous heater tube causes; it is assumed that the pipe is over its entire length or part of it is floating. A layer of lime or other solid precipitation products is relatively stiff, brittle and brittle. If the instantaneous heater tube is moved and / or deformed, so the layer at least partially detaches from the inner tube walls and crumbles into little pieces that are carried away by the liquid become.
  • the movements and / or deformations of the flow heater tube can basically guaranteed by three different tube designs become.
  • the tube can be elastic and by overpressure in the The inside of the pipe can be stretched radially and / or axially.
  • the pipe be flexible and by an external force at at least one of its ends be moved.
  • the tube can be rigid and through an outer Force moves, for example by a vibrating pump itself to vibrate be excited.
  • between static and dynamic modes of action can be distinguished.
  • a liquid to be heated flows through the interior 1 of an inner tube 2 of the instantaneous water heater according to the invention.
  • the inner tube 2 can consist, for example, of aluminum or another metal or of thermally resistant plastic. It can be surrounded by one or more, for example three, inner insulation layers 3-5. These can be required to electrically isolate the inner tube 2 from a heating wire 6 and to ensure operational safety in accordance with the standards of the household electrical industry.
  • the insulation layers 3-5 consist of an electrically insulating, thermally resistant material, for example a high temperature resistant plastic, polyester or glass wool.
  • a heat source in the form of an electrical heating wire 6 on the outside of the inner tube 2 and the insulation layers 3-5 arranged so that the heating wire 6 the liquid can heat in the inner tube.
  • the heating wire 6 is, for example, spiral wrapped around the insulation layers and can, for example, from a NiCr alloy exist.
  • the Insulation layers 3-5 around the heating wire 6 itself instead of around the inner tube 2 to be appropriate; this variant allows a closer winding of the heating wire and by a shorter heating length and better heat transfer.
  • the heating wire 6 shown in Fig. 1 is advantageously designed so that it has a small heat capacity. This property enables a rapid change in temperature of the heating wire 6 and thus facilitates also a quick heating of the liquid in the water heater, so that For example, water with the instantaneous water heater according to the invention can be heated from 20 ° C to approx. 95 ° C in just a few seconds.
  • the type of heat source does not play an essential role in the present invention Role.
  • the liquid could be in the instantaneous water heater according to the invention can also be heated by means other than an electric heating wire, for example with a gas burner.
  • Additional outer insulation layers 7-9 can all be made like a sheath described elements 1-6 include. They ensure thermal Isolation of elements 1-6 from the outside and protect them from mechanical Damage, moisture, dirt, electrical contact and others undesirable external influences.
  • the total pipe 10, consisting of the (partially optional) elements 1-9, is at least limited in all directions perpendicular to the pipe axis bendable and / or at least limited stretchable parallel to the tube axis. These properties ensure that the entire pipe 10 is below the Influence of an internal overpressure and / or external forces moves and / or deformed, which leads to a detachment of lime from the inner pipe walls.
  • the entire pipe 10 can also be designed in other forms, not shown here his; the heating wire 6 could for example be arranged differently or completely eliminated, or the number of insulation layers 3-5 or 7-9 can be one be different.
  • the term "pipe” could be used throughout this document the term "hose" to be replaced.
  • FIGS. 2-12 show various representations according to the invention in schematic representations Precautions by what movements and / or deformations of the entire tube 10 are effected. Doing so will increase the volume the input side of the total pipe 10 input chamber 11, the volume the output side of the total pipe 10 called output chamber 12; in a Coffee machine corresponds to the input chamber 11 of the water storage chamber, the exit chamber 12 of the brewing chamber. Of course, these must be as Chambers designated volumes 11 and 12 no large storage containers be, but can also be, for example, as a tube-like continuation of the Continuous-flow heater total pipe 10 may be formed.
  • the entire pipe 10 is flexible and is deformed by a static overpressure in the interior of the pipe; for example, it has the shape of an expandable and compressible spiral or coil spring.
  • FIG. 2 shows the entire pipe 10 in the idle state, in which the pressure in the pipe interior 1 is equal to the external pressure p 0 .
  • FIG. 3 shows the same overall pipe 10 in the operating state, in which there is a liquid with the pressure p 1 > p 0 inside the pipe. Under the influence of the overpressure p 1 - p 2 , the entire pipe 10 has the tendency to bend straight or to reduce its curvature. If at least one of the two chambers 11 or 12, in this example the exit chamber 12, is movably suspended, the arrangement follows this tendency. The change in location of the exit chamber 12 is indicated in FIG. 3 by an arrow 18. 3, the radius of curvature of the entire tube 10 increases; the resulting change in shape of the entire pipe 10 favors the detachment of lime from the pipe inner walls.
  • FIGS. 4 and 5 show another arrangement according to the invention, in which a flexible overall tube 10 is deformed by a static overpressure in the interior of the tube.
  • FIG. 4 shows a free-hanging overall pipe 10 in the idle state, in which the pressure inside the pipe 1 is equal to the outside pressure p 0 . If the entire tube 10 itself has a negligibly small bending stiffness, its shape in this idle state is largely determined by the forces acting from outside, for example by the gravitational force F g . The overall tube 10 takes approximately the shape that minimizes its total potential energy.
  • FIG. 5 shows the same overall pipe 10 in the operating state in which there is a liquid with the pressure p 1 > p 0 inside the pipe.
  • the overpressure p 1 - p 2 is sufficiently large, for example a few bar, it can considerably increase the bending stiffness of the entire pipe 10.
  • the overall tube 10 then takes on approximately the shape which minimizes the curvatures along the entire tube length. This form in the operating state can differ significantly from that in the idle state; the resulting change in shape favors the detachment of lime from the inner pipe walls.
  • FIGS. 6 and 7 the entire pipe 10 is deformed by a static overpressure in the pipe interior 1.
  • the tube is elastic and is deformed in the radial direction, so that the decalcifying effect according to the invention also applies to a straight tube, for example.
  • FIG. 6 shows the cross section through the inner tube 2 in the idle state, the insulation layers 3-5 and 7-9 and the heater 6 being omitted for the sake of simplicity. It is assumed that a lime layer 13 had already settled on the inner walls of the pipe during the previous operation.
  • the pressure inside the pipe 1 is equal to the outside pressure p 0 ; the pipe diameter is d 0 .
  • Figure 7 shows the same tube 2 in the operating state.
  • a pressure p 1 > p 0 is built up in the liquid inside the tube 1.
  • the overpressure p 1 - p 0 causes the inner tube diameter to increase to d 1 > d 0 ; the lime layer 13 detaches from the inner tube walls and crumbles into small pieces that can be transported away by the liquid.
  • FIGS. 8 and 9 illustrate a dynamic pipe deformation according to the invention using an exemplary embodiment.
  • FIG. 8 shows a flexible overall pipe 10 in the idle state.
  • Input chamber 11, output chamber 12 and total pipe 10 can be arranged practically as desired; the only condition to be met by the arrangement is that the total pipe length 1 must be greater than the distance a between the inlet and outlet chamber.
  • a pump for example located in the inlet chamber 11, begins to build up a pressure p 1 > p 0 in the interior of the pipe, so that a pressure front begins to run from the inlet chamber 11 to the outlet chamber 12.
  • Figure 9 is a snapshot shortly after commissioning.
  • the entire pipe 10 In front of the pressure front at location D, the entire pipe 10 has a low bending stiffness, while the excess pressure p 1 -p 0 behind the location D stiffens the entire pipe and tries to minimize its curvature. Therefore, a wave hump spreads from the input chamber 11 towards the output chamber 12. At the location of the wave hump, the pipe is strongly accelerated and deformed, which results in limescale detachment from the pipe inner walls.
  • FIGS. 1 () and 11 A further embodiment of the invention with a flexible overall tube is shown in FIGS. 1 () and 11.
  • FIG. 10 shows the inlet chamber 11, the entire pipe 10 and the outlet chamber 12 in their normal position.
  • Two important prerequisites are that firstly the length 1 of the entire pipe 10 is greater than the distance a 0 between the inlet chamber 11 and outlet chamber 12 and secondly that the inlet or outlet chamber can be removed from its normal position; otherwise there are no special requirements for the arrangement.
  • one of the two chambers for example the exit chamber 12 is brought out of its normal position by an external force F, the overall pipe 10 assumes a different shape than in the normal position.
  • FIG. 11 one of the two chambers, for example the exit chamber 12
  • the force F increases the distance between the input chamber 11 and the output chamber 12 from a 0 to a 1 > a 0 , so that the curvature along the total pipe length becomes smaller.
  • Such movement and / or deformation of the entire pipe 10 also prevents pipe calcification.
  • This embodiment is motivated by the use of the instantaneous water heater according to the invention in a coffee machine, where the coffee goods in the brewing chamber 12 must be replaced after each coffee preparation; for this purpose the brewing chamber 12 is embedded in a movable part which can be pulled out of the coffee machine.
  • FIG. 12 shows a further dynamic mechanism according to the invention, which counteracts pipe calcification.
  • the entire pipe 10 can also be rigid; it is moved by external forces. Movements of the entire pipe 10 are caused by a pump 14 located in the inlet chamber 11, for example.
  • the shape of the entire tube 10 is immaterial in this embodiment.
  • the pump 14 should be movable or suspended and vibrate during operation, as is the case, for example, with a diaphragm pump. It transmits its vibrations, the direction of which is indicated by an arrow, for example, to the entire pipe 10.
  • the accelerations thus imposed on the entire pipe 10 prevent pipe calcification or promote limescale detachment from the inner pipe walls.
  • the instantaneous water heater according to the invention can be equipped with a control circuit which ensures that the liquid at the pipe end has the desired temperature.
  • Figures 13 and 14 show two variants with control loop.
  • the pipe 15 is shown here without details; it is wrapped with a heating wire 6.
  • a temperature sensor 16 measures the tube temperature T at the end of the tube 15.
  • the temperature of the liquid itself could also be measured at the end of the tube 15 or in the outlet chamber 12.
  • the measured temperature T is a controlled variable for the heating power P H generated by a heating current source 17.
  • the pump 14 promotes a liquid flow ⁇ that is constant over time from the inlet chamber 11 into the outlet chamber 12.
  • the heating power P H is constant over time and the liquid flow ⁇ is variable, ie the temperature T is the controlled variable for the pump power.
  • This variant could prove to be superior to that of FIG. 13.
  • a time-varying liquid flow ⁇ can cause turbulence in the liquid and thus ensure more uniform heating of the liquid and better heat transfer.
  • both the heating power P 11 and the liquid flow ⁇ can be regulated simultaneously.
  • the instantaneous water heater according to the invention consists of an overall pipe 10 through which liquid can flow and a heat source.
  • the entire tube 10 is supported in a floating manner such that it can be moved and / or deformed by an internal overpressure p 1 -p 0 and / or by external forces F.
  • the movements and / or deformations cause undesired precipitation products 13 to detach from the inner tube walls.
  • the invention was stimulated by the need for a non-calcifying water heater in coffee machines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Apparatus For Making Beverages (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Pipe Accessories (AREA)
EP96919519A 1995-06-13 1996-06-11 Durchlauferhitzer Expired - Lifetime EP0832400B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH1736/95 1995-06-13
CH173695 1995-06-13
PCT/CH1996/000222 WO1996041994A1 (de) 1995-06-13 1996-06-11 Durchlauferhitzer

Publications (2)

Publication Number Publication Date
EP0832400A1 EP0832400A1 (de) 1998-04-01
EP0832400B1 true EP0832400B1 (de) 1999-03-03

Family

ID=4217386

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96919519A Expired - Lifetime EP0832400B1 (de) 1995-06-13 1996-06-11 Durchlauferhitzer

Country Status (7)

Country Link
US (1) US6192192B1 (es)
EP (1) EP0832400B1 (es)
JP (1) JPH11515084A (es)
AU (1) AU5808296A (es)
DE (1) DE59601388D1 (es)
ES (1) ES2131947T3 (es)
WO (1) WO1996041994A1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2204507A2 (de) 2005-11-29 2010-07-07 Creaholic SA Wascheinrichtung

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US7690395B2 (en) * 2004-01-12 2010-04-06 Masco Corporation Of Indiana Multi-mode hands free automatic faucet
US8089473B2 (en) 2006-04-20 2012-01-03 Masco Corporation Of Indiana Touch sensor
US8162236B2 (en) 2006-04-20 2012-04-24 Masco Corporation Of Indiana Electronic user interface for electronic mixing of water for residential faucets
US8365767B2 (en) 2006-04-20 2013-02-05 Masco Corporation Of Indiana User interface for a faucet
US8118240B2 (en) 2006-04-20 2012-02-21 Masco Corporation Of Indiana Pull-out wand
US9243756B2 (en) 2006-04-20 2016-01-26 Delta Faucet Company Capacitive user interface for a faucet and method of forming
US9243392B2 (en) 2006-12-19 2016-01-26 Delta Faucet Company Resistive coupling for an automatic faucet
US7806141B2 (en) * 2007-01-31 2010-10-05 Masco Corporation Of Indiana Mixing valve including a molded waterway assembly
WO2008094651A1 (en) 2007-01-31 2008-08-07 Masco Corporation Of Indiana Capacitive sensing apparatus and method for faucets
CA2675417C (en) * 2007-03-28 2015-10-13 Masco Corporation Of Indiana Improved capacitive touch sensor
EP2574701A1 (en) 2007-12-11 2013-04-03 Masco Corporation Of Indiana Electrically controlled Faucet
IT1390897B1 (it) * 2008-08-01 2011-10-19 Gioel Holding S R L Sistema per la rimozione di depositi da uno scambiatore di calore, in particolare uno scambiatore di calore per una macchina per il caffe'.
NL2002378C2 (nl) * 2008-12-27 2010-06-29 Willem Koster Verwarmingsinrichting bestemd voor samenwerking met een vloeistofhouder voorzien van een spuitmond.
US8561626B2 (en) 2010-04-20 2013-10-22 Masco Corporation Of Indiana Capacitive sensing system and method for operating a faucet
US8776817B2 (en) 2010-04-20 2014-07-15 Masco Corporation Of Indiana Electronic faucet with a capacitive sensing system and a method therefor
TWM397280U (en) * 2010-05-06 2011-02-01 xi-fu Chen Vapor generating apparatus
USD677510S1 (en) 2011-06-16 2013-03-12 Calphalon Corporation Coffee maker
US9175458B2 (en) 2012-04-20 2015-11-03 Delta Faucet Company Faucet including a pullout wand with a capacitive sensing
US9149741B2 (en) * 2012-09-24 2015-10-06 Unipure Corporation Mobile fluid treatment system and associated apparatus
US20140361099A1 (en) * 2013-06-05 2014-12-11 Finishing Brands Holdings Inc. System and Method for Thermal Control of Flow Through a Conduit
WO2017062979A1 (en) * 2015-10-08 2017-04-13 Flow Control Llc. Solenoid pump mounting method
CN105180436B (zh) * 2015-10-15 2018-05-29 广西广拓新能源科技有限公司 防垢空气能热水器
CN105258339B (zh) * 2015-10-15 2018-05-29 广西广拓新能源科技有限公司 自动除垢式空气能热水器
CN112648734B (zh) * 2019-03-12 2022-07-05 青岛科技大学 一种进行智能布局的电热水器
CN113048651B (zh) * 2019-03-12 2022-07-05 青岛科技大学 一种场协同智能控制除垢的电热水器
US11448424B2 (en) 2020-04-09 2022-09-20 Eccotemp Systems, LLC Tankless water heater with display and electronic control
US11852381B2 (en) 2020-04-09 2023-12-26 Eccotemp Systems, LLC Water heater device and method of use
EP3892934A1 (en) 2020-04-09 2021-10-13 Eccotemp Systems, LLC Improved water heater device and method of use

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2204507A2 (de) 2005-11-29 2010-07-07 Creaholic SA Wascheinrichtung
EP2204508A2 (de) 2005-11-29 2010-07-07 Creaholic SA Wascheinrichtung
EP2210987A2 (de) 2005-11-29 2010-07-28 Creaholic SA Wascheinrichtung
US8458826B2 (en) 2005-11-29 2013-06-11 Creaholic S.A. Washing device

Also Published As

Publication number Publication date
DE59601388D1 (de) 1999-04-08
EP0832400A1 (de) 1998-04-01
JPH11515084A (ja) 1999-12-21
AU5808296A (en) 1997-01-09
US6192192B1 (en) 2001-02-20
WO1996041994A1 (de) 1996-12-27
ES2131947T3 (es) 1999-08-01

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