EP2443982B1 - Household appliance with continuous flow water heater - Google Patents

Household appliance with continuous flow water heater Download PDF

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Publication number
EP2443982B1
EP2443982B1 EP12000526.9A EP12000526A EP2443982B1 EP 2443982 B1 EP2443982 B1 EP 2443982B1 EP 12000526 A EP12000526 A EP 12000526A EP 2443982 B1 EP2443982 B1 EP 2443982B1
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EP
European Patent Office
Prior art keywords
heater
wall
section
heating
home appliance
Prior art date
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Active
Application number
EP12000526.9A
Other languages
German (de)
French (fr)
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EP2443982A2 (en
EP2443982A3 (en
Inventor
Albert Johann Loichinger
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.)
V-Zug AG
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V-Zug AG
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Priority to EP12000526.9A priority Critical patent/EP2443982B1/en
Priority to SI201231836T priority patent/SI2443982T1/en
Publication of EP2443982A2 publication Critical patent/EP2443982A2/en
Publication of EP2443982A3 publication Critical patent/EP2443982A3/en
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Publication of EP2443982B1 publication Critical patent/EP2443982B1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4285—Water-heater arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/04—Heating arrangements
    • 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
    • F24H1/101—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 using electric energy supply
    • F24H1/102—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 using electric energy supply with resistance
    • 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
    • F24H1/142—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 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
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
    • F24H9/1818—Arrangement or mounting of electric heating means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2301/00—Manual input in controlling methods of washing or rinsing machines for crockery or tableware, i.e. information entered by a user
    • A47L2301/04—Operation mode, e.g. delicate washing, economy washing, reduced time, sterilizing, water softener regenerating, odor eliminating or service
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
    • A47L2501/06—Water heaters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/021—Heaters specially adapted for heating liquids

Definitions

  • the invention relates to a household appliance with a line system for process water and a flow heater arranged in the line system.
  • the instantaneous water heater has a pipe section which encloses an interior in which process water is guided. Furthermore, the instantaneous water heater has a wall heater arranged on or in a wall of the pipe section.
  • the invention also relates to a correspondingly designed instantaneous water heater.
  • Water heaters of this type in which a heater is arranged on the wall of a pipe section, are known.
  • the heat output which can be transferred to the process water with such a water heater, is limited by the length of the pipe section.
  • a long pipe section is required for a high heating output, which leads to space problems or complicated, sinuous geometries.
  • EP 2253899 describes a two-sided instantaneous water heater which has an inner tubular heater and an outer tube with radiators.
  • a water heater according to the preamble of claim 1 is from EP 0 075 274 A1 known.
  • the instantaneous water heater has a pipe section.
  • the pipe section laterally encloses an interior in which the process water is guided.
  • a wall heater is arranged in or on the wall of the pipe section, with which the process water in the interior can be heated.
  • an interior heater with a spacer to the wall is provided in the interior. The interior water can also be heated with this.
  • the pipe section has a curved and a straight section.
  • the interior heater is anchored in the curved section and protrudes into the straight section. In this way, one end of the interior heater can be attached.
  • the internal heater can also be connected to an electrical feedthrough which extends through the wall of the curved section, so that it can be supplied with current.
  • the internal heater advantageously has a U-shaped heating element, which has two straight legs and one has curved connector.
  • a coiled version is also conceivable, ie the interior heating has at least one helical section in the interior. The two legs are anchored in the region of the curved section of the pipe section. In this way, a standard component can be used.
  • the invention is particularly suitable for use in dishwashers or washing machines.
  • Fig. 1 the most important components of a dishwasher are shown in the present context.
  • the device has a tub 1 for receiving the dishes in dish racks (not shown).
  • a circulation pump 2 is used to convey process water from a sump 3 of the tub 1 via a first circulation line 4, a valve arrangement 5 and further lines 6, 7, 7a to spraying agents 8, 9, 9a, so that the dishes in the tub 1 are filled with process water to act upon.
  • the device has a drain pump 10 to convey process water that is no longer required from the device.
  • Other parts of the system which in Fig. 1 Not shown, but are known to the person skilled in the art, include, for example, a fresh water supply, a water softening device, etc.
  • the device has a controller 12 which controls the components of the device in accordance with program specifications which the user inputs via an input and output 13.
  • a continuous-flow heater 14 is provided in the line system, in particular in the part which serves to circulate the process water in the device. This can e.g. be arranged before or after the circulation pump 2.
  • a particularly advantageous embodiment of the instantaneous water heater is shown in Figs. 2-4 illustrated. It forms a pipe section 15 of the line system, which has a curved section 16 and a straight section 17.
  • the pipe section laterally encloses an interior 18, which receives the process water.
  • the process water preferably first enters the curved section 16 and then flows from there into the straight section 17.
  • the instantaneous water heater has two heaters, namely a wall heater 20 and an interior heater 21.
  • the wall heater 20 is arranged in the straight section 17. It extends around the pipe section 17, ie it surrounds it so that it can heat it from all sides. In execution after Figs. 2-4 it is arranged on the wall 22 of the pipe section, specifically from the outside. It can also be integrated in the wall 22 or arranged on the wall 22 from the inside.
  • the wall heater is formed, for example, by a soldered heating element or by a thick film heater.
  • the wall heating is limited to the straight section 17 and does not extend into the curved portion 16, which simplifies the design and manufacture.
  • the wall heater 20 is arranged coaxially to the longitudinal axis 19.
  • the internal heater 21 is arranged in the interior 18 of the instantaneous water heater 14. In order to avoid local overheating and to reduce the risk of blockages (due to foreign substances or deposits), it is arranged at a distance from the wall 22 of the straight section 17, so that e.g. a free flow is still possible even if limescale deposits with a thickness of a few millimeters are formed.
  • a spacer 24 is provided in order to position the inner heater 21 in the pipe section. This has the form of one or more struts which extend from the inner heater 21 to the wall 22.
  • the spacer (24) is designed in such a way that it has a small flow resistance and, if possible, does not offer any attachment points for the connection of contaminants.
  • the inner heater 21 is arranged approximately centrally in the straight pipe section 17 and runs parallel to its longitudinal axis 19.
  • the inner heater 21 has a U-shaped heating element with two straight legs 25 which are connected to one another via a curved connecting piece 26.
  • the legs 25 are anchored in the region of the curved pipe section 16 and run parallel to the longitudinal axis 19.
  • the straight legs have a smooth surface in order to have little resistance and to be less susceptible to limescale or dirt deposits.
  • the head of the internal heater with the connecting piece 26 is located in the straight section 17.
  • the inner heater 21 is in the area of its anchoring with a curved through the wall Section 16 extending electrical feedthrough 27 connected, which ends in external contacts 28.
  • the function of the interior heater 21 and the wall heater 20 is controlled by the controller 12, i.e. the controller 12 can switch the two heaters on and off individually.
  • the controller 12 can e.g. operate the inner heater 21 and the wall heater 20 in parallel in order to achieve a particularly high heating output. However, it can also only activate the internal heating and / or the wall heating, or switch off both heating systems. A series connection of both heaters can also be used to achieve reduced heating output with simple switches.
  • the wall heater 20 preferably has a greater output than the inner heater 21, since it has a larger surface.
  • the outer heater 20 can have a power of approximately 2 kW
  • the inner heater 21 can have a power of approximately 1 kW.
  • the pipe section 15 is preferably made of metal, in particular stainless steel.
  • the instantaneous water heater shown can be modified in many different ways.
  • the interior heater 21 has in the execution Figs. 2-4 a U-shaped heating element. However, it can also be formed, for example, by a straight heating element running parallel to the longitudinal axis.
  • the curved section 16 according to Figs. 2-4 describes an angle of approx. 90 °. However, the angle can also be below or above this value. Furthermore, the curved section 16 runs in a curve, which reduces the risk of blockages. in principle, however, an angular, non-rounded design is also conceivable.
  • the curved section 16 can also be dispensed with entirely. In this case, however, the interior heating must have a radial passage.
  • the use of the curved section 16 has the advantage that an elongated, easier to manufacture or even commercially available heater can be used as the interior heater 21.
  • Another advantage is that the fire protection concept for the internal heating can be made significantly simpler, since the surrounding component is made of non-combustible material.
  • This instantaneous water heater achieves a high thermal output with simple, commercially available components and with a small installation space. Proven components that are not critical with regard to calcification can be used.
  • the same instantaneous water heater can also be supplied with the wall heater 20 or only with the interior heater 21 for lower outputs. This means that this system can also be installed as an additional heater for household appliances with alternative heating (heat pumps).
  • the instantaneous water heater is basically suitable for a wide variety of household appliances, but can be used with particular advantage in dishwashers and washing machines.

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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)
  • Textile Engineering (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Resistance Heating (AREA)

Description

Gebiet der ErfindungField of the Invention

Die Erfindung betrifft ein Haushaltgerät mit einem Leitungssystem für Prozesswasser und einem im Leitungssystem angeordneten Durchlauferhitzer. Der Durchlauferhitzer weist einen Rohrabschnitt auf, welcher einen Innenraum umschliesst, in dem Prozesswasser geführt ist. Weiter besitzt der Durchlauferhitzer eine an oder in einer Wandung des Rohrabschnitts angeordnete Wandheizung. Die Erfindung betrifft auch einen entsprechend ausgeführten Durchlauferhitzer.The invention relates to a household appliance with a line system for process water and a flow heater arranged in the line system. The instantaneous water heater has a pipe section which encloses an interior in which process water is guided. Furthermore, the instantaneous water heater has a wall heater arranged on or in a wall of the pipe section. The invention also relates to a correspondingly designed instantaneous water heater.

Hintergrundbackground

Durchlauferhitzer dieser Art, bei welchen an der wand eines Rohrabschnitts eine Heizung angeordnet ist, sind bekannt. Die Wärmeleistung, welche mit einem solchen Durchlauferhitzer auf das Prozesswasser übertragen werden kann, ist durch die Länge des Rohrabschnitts limitiert. Für eine grosse Heizleistung ist ein langer Rohrabschnitt erforderlich, was zu Platzproblemen führt oder komplizierte, gewundene Geometrien bedingt. In EP 2253899 wird ein zweiseitiger Durchlauferhitzer beschrieben, welcher einen inneren Rohrheizkörper und ein äusseres Rohr mit Heizkörpern aufweist. Alternativ wurde vorgeschlagen, mindestens einen Teil der Heizung an der Pumpe des Haushaltgeräts anzuordnen, was jedoch zu einer relativ teuren Lösung führt, da Spezialkomponenten erforderlich sind.Water heaters of this type, in which a heater is arranged on the wall of a pipe section, are known. The heat output, which can be transferred to the process water with such a water heater, is limited by the length of the pipe section. A long pipe section is required for a high heating output, which leads to space problems or complicated, sinuous geometries. In EP 2253899 describes a two-sided instantaneous water heater which has an inner tubular heater and an outer tube with radiators. Alternatively, it has been proposed to arrange at least part of the heater on the pump of the household appliance, but this leads to a relatively expensive solution, since special components are required.

Ein Durchlauferhitzer gemäß dem Oberbegriff des Anspruchs 1 ist aus EP 0 075 274 A1 bekannt.A water heater according to the preamble of claim 1 is from EP 0 075 274 A1 known.

Darstellung der ErfindungPresentation of the invention

Es stellt sich deshalb die Aufgabe, ein Haushaltgerät und einen Durchlauferhitzer der eingangs genannten Art bereitzustellen, die in einfacher Weise dazu in der Lage sind, eine relativ hohe Heizleistung zu arbringen.It is therefore the task of providing a household appliance and a water heater of the type mentioned at the outset, which are able in a simple manner to produce a relatively high heating output.

Diese Aufgabe wird vom Haushaltgerät bzw. vom Durchlauferhitzer gemäss den unabhängigen Ansprüchen erfüllt.This task is fulfilled by the household appliance or the instantaneous water heater in accordance with the independent claims.

Demgemäss besitzt der Durchlauferhitzer einen Rohrabschnitt. Der Rohrabschnitt umschliesst seitlich einen Innenraum, in welchem das Prozesswasser geführt wird. In oder an der Wandung des Rohrabschnitts ist eine Wandheizung angeordnet, mit welcher das Prozesswasser im Innenraum geheizt werden kann. Zusätzlich ist im Innenraum eine Innenheizung mit einem Abstandhalter zur Wandung vorgesehen. Auch mit dieser kann das Wasser im Innenraum geheizt werden.Accordingly, the instantaneous water heater has a pipe section. The pipe section laterally encloses an interior in which the process water is guided. A wall heater is arranged in or on the wall of the pipe section, with which the process water in the interior can be heated. In addition, an interior heater with a spacer to the wall is provided in the interior. The interior water can also be heated with this.

Somit können im gleichen Bauteil, d.h. im Rohrabschnitt, zwei Heizungen vorgesehen sein, so dass sich die Heizleistung pro Länge des Rohrabschnitts erhöht.Thus, in the same component, i.e. two heaters can be provided in the pipe section, so that the heating power increases per length of the pipe section.

Erfindungsgemäß besitzt der Rohrabschnitt einen gekrümmten und einen geraden Abschnitt. Die Innenheizung wird im gekrümmten Abschnitt verankert und ragt in den geraden Abschnitt hinein. Auf diese Weise kann ein Ende der Innenheizung befestigt werden. Zusätzlich kann die Innenheizung auch mit einer sich durch die Wandung des gekrümmten Abschnitts erstreckenden elektrischen Durchführung verbunden sein, so dass sie mit Strom versorgt werden kann.According to the pipe section has a curved and a straight section. The interior heater is anchored in the curved section and protrudes into the straight section. In this way, one end of the interior heater can be attached. In addition, the internal heater can also be connected to an electrical feedthrough which extends through the wall of the curved section, so that it can be supplied with current.

Die Innenheizung weist vorteilhaft einen U-förmigen Heizstab auf, der zwei gerade Schenkel und ein gekrümmtes Verbindungsstück besitzt. Vorstellbar ist auch eine gewendelte Ausführung, d.h. die Innenheizung weist im Innenraum zumindest einen helixförmig verlaufenden Abschnitt auf. Die beiden Schenkel sind im Bereich des gekrümmten Abschnitts des Rohrabschnitts verankert. Auf diese Weise kann ein Standardbauteil eingesetzt werden.The internal heater advantageously has a U-shaped heating element, which has two straight legs and one has curved connector. A coiled version is also conceivable, ie the interior heating has at least one helical section in the interior. The two legs are anchored in the region of the curved section of the pipe section. In this way, a standard component can be used.

Die Erfindung ist besonders zum Einsatz in Geschirrspülern oder Waschmaschinen geeignet.The invention is particularly suitable for use in dishwashers or washing machines.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Weitere Ausgestaltungen, Vorteile und Anwendungen der Erfindung ergeben sich aus den abhängigen Ansprüchen und aus der nun folgenden Beschreibung anhand der Figuren. Dabei zeigen:

  • Fig. 1 eine schematische Ansicht der Komponenten eines Geschirrspülers,
  • Fig. 2 eine Ansicht eines Durchlauferhitzers,
  • Fig. 3 einen ersten Schnitt durch den Durchlauferhitzer und
  • Fig. 4 einen zweiten Schnitt durch den Durchlauferhitzer entlang Linie IV-IV von Fig. 3.
Further refinements, advantages and applications of the invention result from the dependent claims and from the description that follows with reference to the figures. Show:
  • Fig. 1 1 shows a schematic view of the components of a dishwasher,
  • Fig. 2 a view of a water heater,
  • Fig. 3 a first cut through the water heater and
  • Fig. 4 a second section through the water heater along line IV-IV of Fig. 3 .

Wege zur Ausführung der ErfindungWays of Carrying Out the Invention

In Fig. 1 sind die im vorliegenden Zusammenhang wichtigsten Komponenten eines Geschirrspülers dargestellt. Insbesondere besitzt das Gerät einen Bottich 1 zur Aufnahme des Geschirrs in (nicht gezeigten) Geschirrkörben. Eine Zirkulationspumpe 2 dient dazu, Prozesswasser aus einem Sumpf 3 des Bottichs 1 über eine erste Zirkulationsleitung 4, eine Ventilanordnung 5 und weitere Leitungen 6, 7, 7a zu Sprühmitteln 8, 9, 9a zu fördern, um so das Geschirr im Bottich 1 mit Prozesswasser zu beaufschlagen.In Fig. 1 the most important components of a dishwasher are shown in the present context. In particular, the device has a tub 1 for receiving the dishes in dish racks (not shown). A circulation pump 2 is used to convey process water from a sump 3 of the tub 1 via a first circulation line 4, a valve arrangement 5 and further lines 6, 7, 7a to spraying agents 8, 9, 9a, so that the dishes in the tub 1 are filled with process water to act upon.

Weiter besitzt das Gerät eine Ablaufpumpe 10 um nicht mehr benötigtes Prozesswasser aus dem Gerät zu fördern. Weitere Teile des Systems, welche in Fig. 1 nicht dargestellt, aber dem Fachmann bekannt sind, umfassen z.B. eine Frischwasserzufuhr, eine Wasserenthärtungsvorrichtung, etc. Zudem besitzt das Gerät eine Steuerung 12, welche die Komponenten des Geräts entsprechend Programmvorgaben, welche der Benutzer über eine Ein- und Ausgabe 13 eingibt, steuert.Furthermore, the device has a drain pump 10 to convey process water that is no longer required from the device. Other parts of the system, which in Fig. 1 Not shown, but are known to the person skilled in the art, include, for example, a fresh water supply, a water softening device, etc. In addition, the device has a controller 12 which controls the components of the device in accordance with program specifications which the user inputs via an input and output 13.

Im Leitungssystem, insbesondere in jenem Teil, welcher der Zirkulation des Prozesswassers im Gerät dient, ist ein Durchlauferhitzer 14 vorgesehen. Dieser kann z.B. vor oder nach der Zirkulationspumpe 2 angeordnet sein.A continuous-flow heater 14 is provided in the line system, in particular in the part which serves to circulate the process water in the device. This can e.g. be arranged before or after the circulation pump 2.

Der Aufbau einer besonders vorteilhaften Ausführung des Durchlauferhitzers ist in Fig. 2 - 4 illustriert. Er bildet einen Rohrabschnitt 15 des Leitungssystems, der einen gekrümmten Abschnitt 16 und einen geraden Abschnitt 17 aufweist.The construction of a particularly advantageous embodiment of the instantaneous water heater is shown in Figs. 2-4 illustrated. It forms a pipe section 15 of the line system, which has a curved section 16 and a straight section 17.

Der Rohrabschnitt umschliesst seitlich einen Innenraum 18, der das Prozesswasser aufnimmt. Das Prozesswasser tritt vorzugsweise zunächst in den gekrümmten Abschnitt 16 ein und fliesst von dort sodann in den geraden Abschnitt 17.The pipe section laterally encloses an interior 18, which receives the process water. The process water preferably first enters the curved section 16 and then flows from there into the straight section 17.

Der Durchlauferhitzer besitzt zwei Heizungen, und zwar eine Wandheizung 20 und eine Innenheizung 21.The instantaneous water heater has two heaters, namely a wall heater 20 and an interior heater 21.

Die Wandheizung 20 ist im geraden Abschnitt 17 angeordnet. Sie erstreckt sich um den Rohrabschnitt 17 herum, d.h. sie umschliesst diesen, so dass sie ihn von allen Seiten erwärmen kann. In der Ausführung nach Fig. 2 - 4 ist sie an der Wandung 22 des Rohrabschnitts angeordnet, und zwar von aussen. Sie kann auch in der Wandung 22 integriert oder von innen an der Wandung 22 angeordnet sein. Die Wandheizung wird z.B. von einem aufgelöteten Heizstab oder von einer Dickfilmheizung gebildet.The wall heater 20 is arranged in the straight section 17. It extends around the pipe section 17, ie it surrounds it so that it can heat it from all sides. In execution after Figs. 2-4 it is arranged on the wall 22 of the pipe section, specifically from the outside. It can also be integrated in the wall 22 or arranged on the wall 22 from the inside. The wall heater is formed, for example, by a soldered heating element or by a thick film heater.

In der in Fig. 2 - 4 dargestellten Ausführung ist die Wandheizung auf den geraden Abschnitt 17 beschränkt und erstreckt sich nicht in den gekrümmten Abschnitt 16, was die Konstruktion und Herstellung vereinfacht.In the in Figs. 2-4 shown embodiment, the wall heating is limited to the straight section 17 and does not extend into the curved portion 16, which simplifies the design and manufacture.

Die Wandheizung 20 ist koaxial zur Längsachse 19 angeordnet.The wall heater 20 is arranged coaxially to the longitudinal axis 19.

Die Innenheizung 21 ist im Innenraum 18 des Durchlauferhitzers 14 angeordnet. Um lokales Überhitzen zu vermeiden und um die Gefahr von Verstopfungen (aufgrund von Fremdstoffen oder Ablagerungen) zu reduzieren, ist sie beabstandet von der Wandung 22 des geraden Abschnitts 17 angeordnet, so dass z.B. auch bei Bildung von Kalkablagerungen einer Dicke von einigen Millimetern noch ein freier Fluss möglich ist.The internal heater 21 is arranged in the interior 18 of the instantaneous water heater 14. In order to avoid local overheating and to reduce the risk of blockages (due to foreign substances or deposits), it is arranged at a distance from the wall 22 of the straight section 17, so that e.g. a free flow is still possible even if limescale deposits with a thickness of a few millimeters are formed.

Um die Innenheizung 21 im Rohrabschnitt zu positionieren, ist ein Abstandshalter 24 vorgesehen. Dieser besitzt die Form von einer oder mehreren Streben, die sich von der Innenheizung 21 zur Wandung 22 erstrecken. Der Abstandshalter (24) ist so ausgestaltet, dass er einen kleinen Strömungswiderstand hat und möglichst keine Ansatzstellen für das Anbinden von Schmutzstoffen bietet. Die Innenheizung 21 ist ungefähr mittig im geraden Rohrabschnitt 17 angeordnet und verläuft parallel zu dessen Längsachse 19.In order to position the inner heater 21 in the pipe section, a spacer 24 is provided. This has the form of one or more struts which extend from the inner heater 21 to the wall 22. The spacer (24) is designed in such a way that it has a small flow resistance and, if possible, does not offer any attachment points for the connection of contaminants. The inner heater 21 is arranged approximately centrally in the straight pipe section 17 and runs parallel to its longitudinal axis 19.

Wie insbesondere aus Fig. 4 ersichtlich, weist die Innenheizung 21 einen U-förmigen Heizstab mit zwei geraden Schenkeln 25 auf, die über ein gekrümmtes Verbindungsstück 26 miteinander verbunden sind. Die Schenkel 25 sind im Bereich des gekrümmten Rohrabschnitts 16 verankert und verlaufen parallel zur Längsachse 19. Die geraden Schenkel weisen eine glatte Oberfläche auf, um geringen Widerstand zu haben und weniger anfällig für Kalk- oder Schmutzablagerungen zu sein. Der Kopf der Innenheizung mit dem Verbindungsstück 26 befindet sich im geraden Abschnitt 17.How especially out Fig. 4 can be seen, the inner heater 21 has a U-shaped heating element with two straight legs 25 which are connected to one another via a curved connecting piece 26. The legs 25 are anchored in the region of the curved pipe section 16 and run parallel to the longitudinal axis 19. The straight legs have a smooth surface in order to have little resistance and to be less susceptible to limescale or dirt deposits. The head of the internal heater with the connecting piece 26 is located in the straight section 17.

Die Innenheizung 21 ist im Bereich Ihrer Verankerung mit einer sich durch die Wandung des gekrümmten Abschnitts 16 erstreckenden elektrischen Durchführung 27 verbunden, welche in aussen liegenden Kontakten 28 endet.The inner heater 21 is in the area of its anchoring with a curved through the wall Section 16 extending electrical feedthrough 27 connected, which ends in external contacts 28.

Die Funktion der Innenheizung 21 sowie der Wandheizung 20 wird von der Steuerung 12 gesteuert, d.h. die Steuerung 12 kann die beiden Heizungen individuell ein- und ausschalten. Abhängig vom Prozess, den der Benutzer vorgibt, und vom Zeitabschnitt innerhalb dieses Prozesses, sowie von Prozessparametern, kann die Steuerung 12 z.B. die Innenheizung 21 und die Wandheizung 20 gleichzeitig in Parallelschaltung betreiben, um eine besonders hohe Heizleistung zu erzielen. Sie kann jedoch auch nur die Innenheizung und/oder die Wandheizung in Betrieb setzen, oder beide Heizungen ausschalten. Weiterhin kann durch eine Serieschaltung beider Heizungen eine reduzierte Heizleistung mit einfachen Schaltern realisiert werden.The function of the interior heater 21 and the wall heater 20 is controlled by the controller 12, i.e. the controller 12 can switch the two heaters on and off individually. Depending on the process that the user specifies and the time period within this process, as well as process parameters, the controller 12 can e.g. operate the inner heater 21 and the wall heater 20 in parallel in order to achieve a particularly high heating output. However, it can also only activate the internal heating and / or the wall heating, or switch off both heating systems. A series connection of both heaters can also be used to achieve reduced heating output with simple switches.

Vorzugsweise besitzt die Wandheizung 20 eine grössere Leistung als die Innenheizung 21, da sie über eine grössere Oberfläche verfügt. Beispielsweise kann die Aussenheizung 20 eine Leistung von ca. 2 kW besitzen, und die Innenheizung 21 eine Leistung von ca. 1 kW.The wall heater 20 preferably has a greater output than the inner heater 21, since it has a larger surface. For example, the outer heater 20 can have a power of approximately 2 kW, and the inner heater 21 can have a power of approximately 1 kW.

Um thermische Schäden und Korrosion zu vermeiden und eine gute Wärmeleitung zu erzielen, ist der Rohrabschnitt 15 vorzugsweise aus Metall, insbesondere Edelstahl.In order to avoid thermal damage and corrosion and to achieve good heat conduction, the pipe section 15 is preferably made of metal, in particular stainless steel.

Der gezeigte Durchlauferhitzer kann in verschiedenster Weise abgewandelt werden.The instantaneous water heater shown can be modified in many different ways.

So besitzt die Innenheizung 21 in der Ausführung nach Fig. 2 - 4 einen U-förmigen Heizstab. Sie kann jedoch z.B. auch von einem geraden, parallel zur Längsachse verlaufenden Heizstab gebildet werden.So the interior heater 21 has in the execution Figs. 2-4 a U-shaped heating element. However, it can also be formed, for example, by a straight heating element running parallel to the longitudinal axis.

Der gekrümmte Abschnitt 16 gemäss Fig. 2 - 4 beschreibt einen Winkel von ca. 90°. Der Winkel kann jedoch auch unter oder über diesem Wert liegen. Weiter verläuft der gekrümmte Abschnitt 16 in einer Rundung, wodurch die Gefahr von Verstopfungen reduziert wird - grundsätzlich ist jedoch auch eine eckige, nicht gerundete Ausgestaltung denkbar.The curved section 16 according to Figs. 2-4 describes an angle of approx. 90 °. However, the angle can also be below or above this value. Furthermore, the curved section 16 runs in a curve, which reduces the risk of blockages. in principle, however, an angular, non-rounded design is also conceivable.

Weiter kann auf den gekrümmten Abschnitt 16 auch ganz verzichtet werden. In diesem Falle muss die Innenheizung jedoch eine radiale Durchführung besitzen. Die Verwendung des gekrümmten Abschnitts 16 hat den Vorteil, dass eine gestreckte, einfacher herzustellende oder sogar handelsübliche Heizung als Innenheizung 21 eingesetzt werden kann.Furthermore, the curved section 16 can also be dispensed with entirely. In this case, however, the interior heating must have a radial passage. The use of the curved section 16 has the advantage that an elongated, easier to manufacture or even commercially available heater can be used as the interior heater 21.

Ein weiterer Vorteil liegt darin, dass das Sicherungskonzept gegen Feuer für die innenliegende Heizung bedeutend einfacher gestaltet werden kann, da das umgebende Bauteil aus nichtbrennbarem Material ist.Another advantage is that the fire protection concept for the internal heating can be made significantly simpler, since the surrounding component is made of non-combustible material.

Der vorliegende Durchlauferhitzer erreicht eine hohe Wärmeleistung mit einfachen, handelsüblichen Komponenten und bei kleinem Bauraum. Es können bewährte und hinsichtlich Verkalkung unkritische Komponenten eingesetzt werden.This instantaneous water heater achieves a high thermal output with simple, commercially available components and with a small installation space. Proven components that are not critical with regard to calcification can be used.

Es handelt sich um ein modulares System. Grundsätzlich kann der gleiche Durchlauferhitzer für geringere Leistungen auch nur mit der Wandheizung 20 oder nur mit der Innenheizung 21 ausgeliefert werden. Damit kann dieses System auch als Zusatzheizung eingebaut werden bei Haushaltgeräten mit Alternativheizungen (Wärmepumpen).It is a modular system. In principle, the same instantaneous water heater can also be supplied with the wall heater 20 or only with the interior heater 21 for lower outputs. This means that this system can also be installed as an additional heater for household appliances with alternative heating (heat pumps).

Der Durchlauferhitzer eignet sich grundsätzlich für verschiedenste Haushaltgeräte, kann aber mit besonderem Vorteil bei Geschirrspülern und Waschmaschinen zum Einsatz kommen.The instantaneous water heater is basically suitable for a wide variety of household appliances, but can be used with particular advantage in dishwashers and washing machines.

Während in der vorliegenden Anmeldung bevorzugte Ausführungen der Erfindung beschrieben sind, ist klar darauf hinzuweisen, dass die Erfindung nicht auf diese beschränkt ist und in auch anderer Weise innerhalb des Umfangs der folgenden Ansprüche ausgeführt werden kann.While preferred embodiments of the invention are described in the present application, it should be clearly pointed out that the invention is not limited to these and can also be carried out in other ways within the scope of the following claims.

Claims (13)

  1. Home appliance with
    a pipe system (4 - 9) for process water and
    a flow heater (14) arranged in the pipe system (4-9),
    wherein the flow heater (14) has a tube section (15), wherein the tube section (15) encloses an interior space (18) in which process water is guided, wherein an internal heater (21) is arranged in the interior space (18) spaced from a wall (22) of the tube section (15), wherein the tube section (15) has a curved (16) and a straight section (17), and
    wherein the internal heater (21) is anchored in the curved portion (16) and projects into the straight portion (17),
    characterised in that a wall heater (20) is arranged on or in the wall (22) of the tube section (15) in addition to the internal heater (21), and that a spacer (24) is provided between the internal heater (21) and the wall (22).
  2. Home appliance according to claim 1,
    wherein the internal heater (21) is connected to an electrical feed-through (27) extending through a wall (22) of the curved section (16).
  3. Home appliance according to one of claims 1 or 2, wherein the internal heating (21) in the interior (18) is formed by a straight heating rod.
  4. Home appliance according to one of claims 1 or 2, wherein the internal heater (21) in the interior (18) comprises a U-shaped heating rod which has two straight limbs (25) and a curved connecting piece (26), wherein the limbs (25) are anchored in the region of the curved portion (16) of the tube portion (15).
  5. Home appliance according to one of claims 1 or 2, wherein the internal heating (21) has at least one helical section in the interior (18).
  6. Home appliance according to one of claims 1 to 5, wherein the wall heating (20) is arranged in the straight section (17).
  7. Home appliance according to claim 6,
    wherein the wall heating (20) does not extend into the curved section (16).
  8. Home appliance according to one of claims 1 to 7, wherein the wall heating is arranged coaxially with a longitudinal axis (19) of the straight portion.
  9. Home appliance according to one of claims 1 to 8, wherein the internal heating (21) is arranged parallel to a longitudinal axis (19) of the straight section (17).
  10. Home appliance according to one of the preceding claims, wherein the tube section (15) is made of metal, in particular steel.
  11. Home appliance according to one of the preceding claims with a control (12) which is adapted to operate the internal heating (21) and the wall heating (20) simultaneously or only the internal heating (21) and/or only the wall heating (20) and/or to operate the internal heating (21) and the wall heating (20) in parallel and/or in series, depending on a given process.
  12. Home appliance according to one of the preceding claims, wherein the wall heating (20) encloses the tube section (15).
  13. Flow heater for a home appliance with
    a tube section (15),
    an interior space (18) enclosed by the tube section (15) for conducting process water, and
    an internal heater (21) arranged in the interior (18) spaced from a wall (22) of the tube section (15), wherein the tube section (15) has a curved (16) and a straight section (17), and wherein the internal heater (21) is anchored in the curved section (16) and projects into the straight section (17),
    characterised in that a wall heater (20) is arranged on or in the wall of the tube section (15) in addition to the internal heater (21), and that a spacer (24) is provided between the internal heater (21) and the wall (22).
EP12000526.9A 2012-01-27 2012-01-27 Household appliance with continuous flow water heater Active EP2443982B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP12000526.9A EP2443982B1 (en) 2012-01-27 2012-01-27 Household appliance with continuous flow water heater
SI201231836T SI2443982T1 (en) 2012-01-27 2012-01-27 Household appliance with continuous flow water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12000526.9A EP2443982B1 (en) 2012-01-27 2012-01-27 Household appliance with continuous flow water heater

Publications (3)

Publication Number Publication Date
EP2443982A2 EP2443982A2 (en) 2012-04-25
EP2443982A3 EP2443982A3 (en) 2012-08-22
EP2443982B1 true EP2443982B1 (en) 2020-06-24

Family

ID=45560679

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12000526.9A Active EP2443982B1 (en) 2012-01-27 2012-01-27 Household appliance with continuous flow water heater

Country Status (2)

Country Link
EP (1) EP2443982B1 (en)
SI (1) SI2443982T1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140112650A1 (en) * 2012-10-19 2014-04-24 Edwards Vacuum, Inc. Cartridge heater apparatus
EP2775025A1 (en) * 2013-03-05 2014-09-10 Vestel Beyaz Esya Sanayi Ve Ticaret A.S. Washing device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4326552A (en) * 1979-01-23 1982-04-27 Ingo Bleckmann Heater for heating flows of fluid and dishwashing machine provided therewith
DE3138293A1 (en) * 1981-09-25 1983-07-14 Elpag AG Chur, 7001 Chur CONTINUOUS HEATER
DE9318498U1 (en) * 1993-12-03 1994-01-20 Stiebel Eltron Gmbh & Co Kg, 37603 Holzminden Heating insert of an electric instantaneous water heater
DE20321667U1 (en) * 2003-05-16 2008-10-09 Stiebel Eltron Gmbh & Co. Kg liquid heater
EP2253899A3 (en) * 2009-05-15 2013-09-18 Alexander Kunz Two-sided cavity chamber percolator
DE202009007007U1 (en) * 2009-05-15 2009-08-06 Kunz, Alexander Two-sided gap chamber heater

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
SI2443982T1 (en) 2020-10-30
EP2443982A2 (en) 2012-04-25
EP2443982A3 (en) 2012-08-22

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