EP0075274A1 - Continuous-flow heater - Google Patents

Continuous-flow heater Download PDF

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Publication number
EP0075274A1
EP0075274A1 EP82108528A EP82108528A EP0075274A1 EP 0075274 A1 EP0075274 A1 EP 0075274A1 EP 82108528 A EP82108528 A EP 82108528A EP 82108528 A EP82108528 A EP 82108528A EP 0075274 A1 EP0075274 A1 EP 0075274A1
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EP
European Patent Office
Prior art keywords
tube
tubular
flow tube
flow
heater
Prior art date
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Granted
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EP82108528A
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German (de)
French (fr)
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EP0075274B1 (en
Inventor
Ingo Dr. Dipl.-Ing. Bleckmann
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ELPAG AG CHUR
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ELPAG AG CHUR
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Application filed by ELPAG AG CHUR filed Critical ELPAG AG CHUR
Priority to AT82108528T priority Critical patent/ATE12308T1/en
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    • 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
    • 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

Definitions

  • the dishwashing liquid or washing liquor is heated in a collecting container with the help of heating elements present in this collecting container.
  • the entire volume of the rinsing or washing liquor present in the collecting container is heated, for which purpose a relatively high energy requirement is necessary, although often smaller amounts of lye than are present in the collecting container during the respective heating process would suffice for the washing process to be carried out.
  • the object of the invention is to provide a heating device for dishwashers and washing machines, with which energy savings are achieved compared to previously known heating devices, particularly when small volumes of liquid have to be heated.
  • the continuous-flow heater is advantageously designed such that it can be attached or used directly on the hose for the washing or washing liquid present in the dishwasher or washing machine, which is to be introduced into the washing or washing liquor collecting container. This can be accomplished in that the flow tube of the flow heater is matched to the diameter of the hose at both connection ends. This is about 20-22 mm in a dishwasher.
  • the length of the tubular heater, which protrudes into the flow pipe, is depending on the required Dimensioned heating power. There may also be several tubular heaters as heating devices in the flow tube. In this way, energy-saving rapid heating of the rinsing or washing liquor required for the rinsing or washing process can be achieved.
  • the invention is particularly advantageous when small amounts of lye are to be heated.
  • dry-running protection e.g. B. in the form of a bimetallic switch which is actuated on the outside of the flow tube and depending on the temperature of the flow tube.
  • the bimetal switch is open, so that the power supply to the heater of the flow heater is switched off with certainty.
  • the flow pipe and the casing pipe of the tubular heating element or the tubular heating element are made of chromium-nickel steel, the casing pipe of the tubular heating element being more noble than the flow pipe.
  • a secure and tight attachment of the tubular heating element in the flow tube can be achieved by soldering the tubular casing of the tubular heating element to the flow tube, the tubular casing of the tubular heating element being inserted into bores in the flow tube.
  • the connection ends or terminals of the tubular heater or the tubular heater protrude from the flow pipe, so that the connection of the tubular heater to an electrical power supply is easily possible.
  • the continuous-flow heater has a continuous tube 1 with a curved part 12.
  • the curved part 12 of the continuous tube 1 On the outer curvature of the curved part 12 of the continuous tube 1, holes are provided through which two tubular heating elements 2, 3 are inserted and at these points by soldering 18 , 19, 20, 21 are passed tightly through the bores and are fastened in these bores.
  • the tubular heater 2 and 3 are U-shaped or hairpin-shaped and the majority of the parallel legs of the tubular heater extend into the interior of the flow tube 1.
  • power supply cables can be used can be connected in a simple manner for the energy supply of the tubular heater.
  • the individual legs of the tubular heating elements 2 and 3 have an angular distance of 90 ° from one another.
  • the diameter of the flow tube 1 is adapted to the diameter of hose sections 4, 5 and is directly attached to these hose sections.
  • the hose formed by the hose sections 4 and 5 is used to feed the rinsing or washing liquor into the washing room or washing space of the dishwasher or washing machine.
  • the outer diameter of the flow tube 1 at its respective connection ends 6 and 7 is adapted to the inner diameter of the hose sections 4 and 5. The hose sections are pushed over the connection ends 6 and 7 and fastened with the aid of, for example, clamps 22, 23.
  • bimetal switch On the outside of the flow tube 1 there is a bimetal switch which, in the open state, interrupts the power supply to the tubular heaters 2 and 3. This bimetal switch is open when no liquid to be heated flows through the flow tube 1. In this way, dry-running protection of the instantaneous water heater is achieved.
  • the diameter for the hose that transports the washing or washing liquor to the collecting area or washing area is approximately 20-22 mm. It is of course also possible to adapt only the connection ends 6 and 7 of the flow pipe to this diameter and to equip the part of the flow pipe 1 in which the tubular heating elements 2, 3 are arranged with a larger diameter, so that there is sufficient space for the arrangement of the Tubular heating element within the flow tube 1.
  • the length of the leg pieces of the tube heating element 2 and 3 located in the flow tube 1 depends on the heating power required.
  • tubular heating elements 2 and 3 shows a further exemplary embodiment in which a simple design of the tubular heating elements 2 and 3 is made possible.
  • tubular heating elements 2 and 3 which run in a straight line can be used, which have bores in the outer curvatures of curved parts 12 and 13 of the flow tube 1 inserted and sealed and secured in these holes by soldering 18, 19, 20, 21.
  • these tubular heating elements can also be connected to the electrical power supply at the projecting connection ends 8, 9 and 10, 11.
  • the straightforward design of tubular heating elements 2 and 3 is made possible by the fact that the flow tube has two curved parts 12 and 13.
  • the length of the straight middle pipe section 15 of the flow tube 1 is dimensioned, and the number and the length of the flow heaters 2 and 3 located within the flow tube are determined. e.g. B. four instantaneous water heaters can be provided.
  • the connection of the hose pieces 4 and 5 to the connection ends 6 and 7 of the flow tube is carried out in the same manner as in the embodiment of FIGS. 1 and 2.
  • a bimetal switch 17 is also provided as dry-running protection with the same function as in the first embodiment.
  • the invention thus provides a continuous flow heater for a dishwasher or washing machine, comprising a flow tube 1 having at least one curved part 12, in the interior of which tubular heating elements 2, 3 are arranged, the connection ends 8, 9, 10, 11 through the jacket of the flow pipe 1 protrude outwards, the seal between the casing pipe 16 of the tubular heater 2, 3 and the wall of the flow pipe 1 being achieved by soldering 18, 19, 20, 21.
  • a collecting space for the washing or rinsing liquor as is present in conventional washing machines and dishwashers, can advantageously be saved.
  • a variant of the instantaneous water heater consists in that the continuous tube is circular for most or all of its length. It is then a likewise tubular tubular heater, the two ends of which are straight, threaded through one of the openings of the flow tube until the straight end of the tube heater encounters an opening provided in the jacket of the flow tube. The other end of the tubular heater is then passed into a corresponding opening at the other end of the flow tube.
  • a concentric arrangement of the tubular heater in the circular flow tube can be achieved.
  • the ends of the tubular tubular heater can also be bent perpendicular to the central axis thereof and then e.g. be led downwards out of the flow tube.

Abstract

1. A continuous flow heater for the cleaning and rinsing liquid in a laundry-washing or dish-washing machine, said continuous flow heater having at least one tubular heater body (2, 3) bent into a U-shape and disposed in the liquid flow path, characterized in that a flow pipe is provided, having at least one curved portion (12) as well as a straight pipe portion connecting therewith, that by being connected at both pipe ends (6, 7) the flow pipe (1) is directly inserted in the liquid-carrying hose supplying the cleaning or rinsing fluid to the washing or rinsing chamber of said machine, and that the tubular heater body or bodies (2, 3), which are bent into U-shape, are disposed within the straight pipe portion (15) of the flow pipe with their ends (8 to 11) protruding from the curved portion (12) of the flow pipe (1).

Description

In Ge schirrspül- bzw. Waschmaschinen erfolgt die Erhitzung der Spül- bzw. Waschlauge in einem Sammelbehälter mit Hilfe von in diesem Sammelbehälter vorhandenen Heizstäben. Dabei wird das gesamte Volumen der im Sammelbehälter vorhandenen Spül- bzw. Waschlauge erwärmt, wozu ein relativ hoher Energiebedarf notwendig ist, obgleich häufig für den vorzunehmenden Waschvorgang geringere Laugenmengen, als im Sammelbehälter beim jeweiligen Heizvorgang vorhanden sind, ausreichen würden.In dishwashers or washing machines, the dishwashing liquid or washing liquor is heated in a collecting container with the help of heating elements present in this collecting container. The entire volume of the rinsing or washing liquor present in the collecting container is heated, for which purpose a relatively high energy requirement is necessary, although often smaller amounts of lye than are present in the collecting container during the respective heating process would suffice for the washing process to be carried out.

Ein Beispiel einer derartigen Geschirrspülmaschine zeigt die US-A-3 023 757. Im Schmutzwassersumpf des das Geschirr aufnehmenden Behälters ist dabei ein ringförmiger Rohrheizkörper angeordnet.An example of such a dishwasher is shown in US Pat. No. 3,023,757. In this case, an annular tubular heating element is arranged in the dirty water sump of the container holding the dishes.

Es ist auch z. B. aus der US-A- 3 130 737 bekannt,. bei einer Geschirrspülmaschine den der Trocknung des Geschirrs dienenden Luftstrom durch eine Wärmespeichereinrichtung zu leiten, die von einem elektrischen Heizwiderstand erhitzt wird.It is also e.g. B. from US-A-3 130 737 known. in the case of a dishwasher, to direct the air flow serving to dry the dishes through a heat storage device which is heated by an electrical heating resistor.

Aufgabe der Erfindung ist es, für Geschirrspül- bzw. Waschmaschinen eine Heizeinrichtung zu schaffen, mit der insbesondere dann, wenn geringe Flüssigkeitsvolumina erhitzt werden müssen, eine Energieeinsparung gegenüber bisher bekannten Heizvorrichtungen erzielt wird.The object of the invention is to provide a heating device for dishwashers and washing machines, with which energy savings are achieved compared to previously known heating devices, particularly when small volumes of liquid have to be heated.

Diese Aufgabe wird gelöst durch den Anspruch 1, wobei Weiterbildungen der Erfindung in den Unteransprüchen angegeben sind.This object is achieved by claim 1, further developments of the invention being specified in the subclaims.

In vorteilhafter Weise ist der Durchlauferhitzer so ausgebildet, daß er direkt an den in der Geschirrspülmaschine bzw. Waschmaschine vorhandenen Schlauch für die Spül- bzw. Waschflüssigkeit, welche in den Spül- bzw. Waschlaugensammelbehälter eingeleitet werden soll, angesetzt bzw. eingesetzt werden kann. Dies läßt sich dadurch bewerkstelligen, daß das Durchlaufrohr des Durchlauferhitzers an beiden Anschlußenden auf den Durchmesser des Schlauches abgestimmt ist. Dieser beträgt in einer Geschirrspülmaschine etwa 20 - 22 mm. Die Länge des Rohrheizkörpers, der in das Durchlaufrohr ragt, wird je nach geforderter Heizleistung bemessen. Es können auch mehrere Rohrheizkörper als Heizeinrichtung im Durchlaufrohr vorhanden sein. Auf diese Weise läßt sich eine energieeinsparende rasche Erhitzung der für den Spül- bzw. Waschvorgang benötigten Spül- bzw. Waschlauge erzielen. Von Vorteil ist die Erfindung insbesondere dann, wenn geringe Laugenmengen erhitzt werden sollen.The continuous-flow heater is advantageously designed such that it can be attached or used directly on the hose for the washing or washing liquid present in the dishwasher or washing machine, which is to be introduced into the washing or washing liquor collecting container. This can be accomplished in that the flow tube of the flow heater is matched to the diameter of the hose at both connection ends. This is about 20-22 mm in a dishwasher. The length of the tubular heater, which protrudes into the flow pipe, is depending on the required Dimensioned heating power. There may also be several tubular heaters as heating devices in the flow tube. In this way, energy-saving rapid heating of the rinsing or washing liquor required for the rinsing or washing process can be achieved. The invention is particularly advantageous when small amounts of lye are to be heated.

Zum Schutze des Betriebs ohne Flüssigkeit kann ein Trockengehschutz, z. B. in Form eines Bimetallschalters, der an der Außenseite des Durchlaufrohres und in Abhängigkeit von der Temperatur des Durchlaufrohres betätigt wird, vorhanden sein. Auf diese Weise wird gewährleistet, daß dann, wenn das Durchlaufrohr nicht von zu erhitzender Flüssigkeit durchströmt wird, der Bimetallschalter geöffnet ist, so daß die Stromversorgung der Heizeinrichtung des Durchlauferhitzers mit Sicherheit abgeschaltet ist.To protect the operation without liquid, dry-running protection, e.g. B. in the form of a bimetallic switch which is actuated on the outside of the flow tube and depending on the temperature of the flow tube. In this way it is ensured that when the flow tube is not flowed through by liquid to be heated, the bimetal switch is open, so that the power supply to the heater of the flow heater is switched off with certainty.

Das Durchlaufrohr sowie das Mantelrohr des Rohrheizkörpers bzw. der Rohrheizkörper kömen aus Chromnickelstahl bestehen, wobei das Mantelrohr des Rohrheizkörpers edler ist als das Durchlaufrohr. Eine sichere und dichte Befestigung der Rohrheizkörper im Durchlaufrohr läßt sich durch Verlöten des Mantelrohres des Rohrheizkörpers mit dem Durchlaufrohr erzielen, wobei das Mantelrohr des Rohrheizkörpers in Bohrungen des Durchlaufrohres eingesteckt ist. Die Anschlußenden bzw. Anschlußklemmen des Rohrheizkörpers bzw. der Rohrheizkörper ragen dabei aus dem Durchlaufrohr heraus, so daß der Anschluß der Rohrheizkörper an eine elektrische Stromversorgung ohne weiteres möglich ist.The flow pipe and the casing pipe of the tubular heating element or the tubular heating element are made of chromium-nickel steel, the casing pipe of the tubular heating element being more noble than the flow pipe. A secure and tight attachment of the tubular heating element in the flow tube can be achieved by soldering the tubular casing of the tubular heating element to the flow tube, the tubular casing of the tubular heating element being inserted into bores in the flow tube. The connection ends or terminals of the tubular heater or the tubular heater protrude from the flow pipe, so that the connection of the tubular heater to an electrical power supply is easily possible.

In den beiliegenden Figuren sind Ausführungsbeispiele der Erfindung dargestellt. Anhand dieser Figuren wird die Erfindung noch näher erläutert. Es zeigen:

  • Fig. 1 eine Seitenansicht eines Ausführungsbeispiels des Durchlauferhitzers;
  • Fig. 2 einen Schnitt entlang der Schnittlinie I-I in der Fig. 1 und
  • Fig. 3 ein weiteres Ausführungsbeispiel.
Exemplary embodiments of the invention are shown in the accompanying figures. With the help of these figures, the invention will become even closer purifies. Show it:
  • Fig. 1 is a side view of an embodiment of the water heater;
  • Fig. 2 shows a section along the section line II in Fig. 1 and
  • Fig. 3 shows another embodiment.

Beim Ausführungsbeispiel der Fig. 1 und 2 besitzt der Durchlauferhitzer ein Durchlaufrohr 1 mit einem gekrümmten Teil 12. An der Außenkrümmung des gekrümmten Teils 12 des Durchlaufrohres 1 sind Bohrungen vorgesehen, durch die zwei Rohrheizkörper 2, 3 hindurchgesteckt sind und an diesen Stellen durch Lötungen 18, 19, 20, 21 dicht durch die Bohrungen hindurchgeführt sind und in diesen Bohrungen befestigt sind. Die Rohrheizkörper 2 und 3 sind U-förmig bzw. haarnadelförmig gebogen und der größte Teil der parallelen Schenkel der Rohrheizkörper erstrecken sich in das Innere des Durchlaufrohres 1. An den aus dem Durchlaufrohr 1 herausragenden Anschlußenden 8, 9 und 10, 11 der Rohrheizkörper können Stromversorgungskabel in einfacher Weise für die Energieversorgung der Rohrheizkörper angeschlossen werden. Wie insbesondere aus der Fig. 2 zu ersehen ist, besitzen die einzelnen Schenkel der Rohrheizkörper 2 und 3 einen Winkelabstand von 90° voneinander.In the embodiment of FIGS. 1 and 2, the continuous-flow heater has a continuous tube 1 with a curved part 12. On the outer curvature of the curved part 12 of the continuous tube 1, holes are provided through which two tubular heating elements 2, 3 are inserted and at these points by soldering 18 , 19, 20, 21 are passed tightly through the bores and are fastened in these bores. The tubular heater 2 and 3 are U-shaped or hairpin-shaped and the majority of the parallel legs of the tubular heater extend into the interior of the flow tube 1. At the connecting ends 8, 9 and 10, 11 of the tube heater protruding from the flow tube 1, power supply cables can be used can be connected in a simple manner for the energy supply of the tubular heater. As can be seen in particular from FIG. 2, the individual legs of the tubular heating elements 2 and 3 have an angular distance of 90 ° from one another.

Der Durchmesser des Durchlaufrohres 1 ist an den Durchmesser von Schlauchstücken 4, 5 angepaßt und direkt an diesen Schlauchstücken angesteckt. Der von den Schlauchstücken 4 und 5 gebildete Schlauch dient zur Zuführung der Spül- bzw. Waschlauge in den Spülraum bzw. Waschraum der Geschirrspülmaschine bzw. Waschmaschine. Beim dargestellten Ausführungsbeispiel ist der Außendurchmesser des Durchlaufrohres 1 an seinen jeweiligen Anschlußenden 6 und 7 angepaßt an den Innendurchmesser der Schlauchstücke 4 und 5. Die Schlauchstücke sind über die Anschlußenden 6 und 7 geschoben und mit Hilfe von beispielsweise Klemmschellen 22, 23 befestigt.The diameter of the flow tube 1 is adapted to the diameter of hose sections 4, 5 and is directly attached to these hose sections. The hose formed by the hose sections 4 and 5 is used to feed the rinsing or washing liquor into the washing room or washing space of the dishwasher or washing machine. In the illustrated embodiment, the outer diameter of the flow tube 1 at its respective connection ends 6 and 7 is adapted to the inner diameter of the hose sections 4 and 5. The hose sections are pushed over the connection ends 6 and 7 and fastened with the aid of, for example, clamps 22, 23.

An der Außenseite des Durchlaufrohres 1 befindet sich ein Bimetallschalter, der in geöffnetem Zustand die Stromversorgung der Rohrheizkörper 2 und 3 unterbricht. Dieser Bimetallschalter ist dann geöffnet, wenn keine zu erhitzende Flüssigkeit durch das Durchlaufrohr 1 fließt. Auf diese Weise wird ein Trockengehschutz des Durchlauferhitzers erzielt.On the outside of the flow tube 1 there is a bimetal switch which, in the open state, interrupts the power supply to the tubular heaters 2 and 3. This bimetal switch is open when no liquid to be heated flows through the flow tube 1. In this way, dry-running protection of the instantaneous water heater is achieved.

In gebräuchlichen Geschirrspülmaschinen beträgt der Durchmesser für den Schlauch, welcher die Spül- bzw. Waschlauge zum Sammelraum bzw. Waschraum transportiert, etwa 20 - 22 mm. Es ist natürlich auch möglich, nur die Anschlußenden 6 und 7 des Durchlaufrohres an diesen Durchmesser anzupassen und den Teil des Durchlaufrohres 1, in welchem die Rohrheizkörper 2, 3 angeordnet sind, mit größerem Durchmesser auszustatten, so daß ausreichend Platz vorhanden ist für die Anordnung der Rohrheizkörper innerhalb des Durchlaufrohres 1. Die Länge der im Durchlaufrohr 1 befindlichen Schenkelstücke der Rohrheizkörper 2 und 3 hängt ab von der geforderten Heizleistung.In conventional dishwashers, the diameter for the hose that transports the washing or washing liquor to the collecting area or washing area is approximately 20-22 mm. It is of course also possible to adapt only the connection ends 6 and 7 of the flow pipe to this diameter and to equip the part of the flow pipe 1 in which the tubular heating elements 2, 3 are arranged with a larger diameter, so that there is sufficient space for the arrangement of the Tubular heating element within the flow tube 1. The length of the leg pieces of the tube heating element 2 and 3 located in the flow tube 1 depends on the heating power required.

In der Fig. 3 ist ein weiteres Ausführungsbeispiel dargestellt, bei welchem eine einfache Ausbildung der Rohrheizkörper 2 und 3 ermöglicht wird. Es können bei diesem Ausführungsbeispiel geradlinig verlaufende Rohrheizkörper 2 und 3 verwendet werden, die in Bohrungen an den Außenkrümmungen gekrümmter Teile 12 und 13 des Durchlaufrohres 1 eingesteckt und in diesen Bohrungen durch Lötungen 18, 19, 20, 21 abgedichtet und befestigt sind. Wie beim Ausführungsbeispiel der Fig. 1 und 2 können auch diese Rohrheizkörper an den überstehenden Anschlußenden 8, 9 und 10, 11 an die elektrische Stromversorgung angeschlossen werden. Die geradlinige Ausbildung der Rohrheizkörper 2 und 3 wird ermöglicht dadurch, daß das Durchlaufrohr zwei gekrümmte Teile 12 und 13 aufweist. In Abhängigkeit von der abzugebenden Heizleistung ist die Länge des geraden mittleren Rohrstückes 15 des Durchlaufrohres 1 bemessen sowie die Anzahl und die damit festgelegte, innerhalb des Durchlaufrohres befindliche Länge der Durchlauferhitzer 2 und 3. Anstelle von zwei Durchlauferhitzern können bei diesem Ausführungsbeispiel natürlich auch mehr Durchlauferhitzer, z. B. vier Durchlauferhitzer, vorgesehen sein. Der Anschluß der Schlauchstücke 4 und 5 an die Anschlußenden 6 und 7 des Durchlaufrohres erfolgt in der gleichen Weise wie beim Ausführungsbeispiel der Fig. 1 und 2. Ferner ist ebenfalls ein Bimetallschalter 17 als Trockengehschutz mit der gleichen Funktion wie beim ersten Ausführungsbeispiel vorgesehen.3 shows a further exemplary embodiment in which a simple design of the tubular heating elements 2 and 3 is made possible. In this exemplary embodiment, tubular heating elements 2 and 3 which run in a straight line can be used, which have bores in the outer curvatures of curved parts 12 and 13 of the flow tube 1 inserted and sealed and secured in these holes by soldering 18, 19, 20, 21. As in the embodiment of FIGS. 1 and 2, these tubular heating elements can also be connected to the electrical power supply at the projecting connection ends 8, 9 and 10, 11. The straightforward design of tubular heating elements 2 and 3 is made possible by the fact that the flow tube has two curved parts 12 and 13. Depending on the heat output to be delivered, the length of the straight middle pipe section 15 of the flow tube 1 is dimensioned, and the number and the length of the flow heaters 2 and 3 located within the flow tube are determined. e.g. B. four instantaneous water heaters can be provided. The connection of the hose pieces 4 and 5 to the connection ends 6 and 7 of the flow tube is carried out in the same manner as in the embodiment of FIGS. 1 and 2. Furthermore, a bimetal switch 17 is also provided as dry-running protection with the same function as in the first embodiment.

Durch die Erfindung wird somit ein Durchlauferhitzer für eine Geschirrspül- bzw. Waschmaschine geschaffen, bestehend aus einem mindestens einen gekrümmten Teil 12 aufweisenden Durchlaufrohr 1, in dessen Innerem Rohrheizkörper 2, 3 angeordnet sind, deren Anschlußenden 8, 9, 10, 11 durch den Mantel des Durchlaufrohres 1 nach außen ragen, wobei die Abdichtung zwischen dem Mantelrohr 16 der Rohrheizkörper 2, 3 und der Wandung des Durchlaufrohres 1 durch Lötungen 18, 19, 20, 21 erzielt wird. In vorteilhafter Weise kann dadurch ein Sammelraum für die Wasch- bzw. Spüllauge, wie er bei herkömmlichen Wasch- und Geschirrspülmaschinen vorhanden ist, eingespart werden.The invention thus provides a continuous flow heater for a dishwasher or washing machine, comprising a flow tube 1 having at least one curved part 12, in the interior of which tubular heating elements 2, 3 are arranged, the connection ends 8, 9, 10, 11 through the jacket of the flow pipe 1 protrude outwards, the seal between the casing pipe 16 of the tubular heater 2, 3 and the wall of the flow pipe 1 being achieved by soldering 18, 19, 20, 21. In this way, a collecting space for the washing or rinsing liquor, as is present in conventional washing machines and dishwashers, can advantageously be saved.

Eine nicht dargestellte Variante des Durchlauferhitzers besteht darin, daß das Durchlaufrohr über den größten Teil oder die gesamte Länge kreisringförmig ausgebildet wird. Es wird dann ein ebenfalls ringförmiger Rohrheizkörper, dessen beide Enden gerade ausgebildet sind, durch eine der Öffnungen des Durchlaufrohres eingefädelt, bis das gerade Ende des Rohrheizkörpers auf eine im Mantel des Durchlaufrohres vorgesehene Öffnung stößt. Das andere Ende des Rohrheizkörpers wird dann in eine entsprechende Öffnung am anderen Ende des Durchlaufrohres geführt. Durch entsprechendes Justieren der geraden Enden des Rohrheizkörpers kann eine konzentrische Anordnung des Rohrheizkörpers in dem kreisförmigen Durchlaufrohr erzielt werden. Alternativ können die Enden des ringförmigen Rohrheizkörpers auch senkrecht zur Mittelachse desselben abgebogen und dann z.B. nach unten aus dem Durchlaufrohr herausgeführt sein.A variant of the instantaneous water heater, not shown, consists in that the continuous tube is circular for most or all of its length. It is then a likewise tubular tubular heater, the two ends of which are straight, threaded through one of the openings of the flow tube until the straight end of the tube heater encounters an opening provided in the jacket of the flow tube. The other end of the tubular heater is then passed into a corresponding opening at the other end of the flow tube. By appropriate adjustment of the straight ends of the tubular heater, a concentric arrangement of the tubular heater in the circular flow tube can be achieved. Alternatively, the ends of the tubular tubular heater can also be bent perpendicular to the central axis thereof and then e.g. be led downwards out of the flow tube.

Claims (9)

1. Durchlauferhitzer mit einem Durchlaufrohr (1, 12) für eine mittels einer als Rohrheizkörper (2, 3) ausgebildeten Heizeinrichtung zu erwärmenden Flüssigkeit, dadurch gekennzeichnet , daß zum Erwärmen einer Reinigungs- oder Spülflüssigkeit in einer Wasch- oder Geschirrspülmaschine das Durchlaufrohr (1) durch Anschließen beider Rohrenden (6, 7) direkt in den Flüssigkeitsschlauch. der die Reinigungs- bzw. Spülflüssigkeit dem Wasch- bzw. Spülraum der Maschine zuleitet, eingesetzt ist.1. instantaneous heater with a continuous tube (1, 12) for a liquid to be heated by means of a tubular heater (2, 3), characterized in that for heating a cleaning or rinsing liquid in a washing machine or dishwasher, the continuous tube (1) by connecting both pipe ends (6, 7) directly into the liquid hose. which feeds the cleaning or rinsing liquid to the washing or rinsing room of the machine. 2. Durchlauferhitzer nach Anspruch 1, dadurch gekennzeichnet, daß der bzw. die die Heizeinrichtung bildende(n) Rohrheizkörper (2, 3) innerhalb des Durchlaufrohres (1) angeordnet ist bzw. sind und die Anschlußenden (8, 9 bzw. 10, 11) des bzw. der Rohrheizkörper (2, 3) dicht aus dem Durchlaufrohr (1) herausgeführt sind.2. instantaneous water heater according to claim 1, characterized in that the or the heating device forming (s) tubular heater (2, 3) within the flow tube (1) is or are and the connection ends (8, 9 and 10, 11th ) of the tubular heater (2, 3) are tightly led out of the flow tube (1). 3. Durchlauferhitzer nach Anspruch 1 oder 2, dadurch gekennzeichnet , daß das Durchlaufrohr (1) einen gekrümmten Teil (12) aufweist und die Anschlußenden (8, 9) bzw. (10, 11) des bzw. der U-förmig gebogenen Rohrheizkörper (2, 3) im Bereich des gekrümmten Teils (12) des Durchlaufrohres (1) aus diesem herausgeführt sind.3. instantaneous water heater according to claim 1 or 2, characterized in that the continuous tube (1) has a curved part (12) and the connection ends (8, 9) or (10, 11) of the U-shaped tubular heater ( 2, 3) in the region of the curved part (12) of the flow tube (1) are led out of the latter. 4. Durchlauferhitzer nach Anspruch 3, dadurch gekennzeichnet , daß zwei U-förmige Rohrheizkörper (2, 3) mit 90°-Winkelabstand im Durchlaufrohr (1) angeordnet sind.4. instantaneous water heater according to claim 3, characterized in that two U-shaped tubular heating elements (2, 3) are arranged at a 90 ° angular distance in the continuous tube (1). 5. Durchlauferhitzer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Durchlaufrohr zwei gekrümmte Teile (12 und 13) sowie einen dazwischen befindlichen geradlinigen Rohrabschnitt (15) aufweist und einer oder mehrere geradlinige Rohrheizkörper (2, 3) in diesen geradlinigen Rohrabschnitt (15) mit an den gekrümmten Teilen (12, 13) des Durchlaufrohres (1) herausragenden Enden (8, 9 bzw. 10, 11) angeordnet sind.5. water heater according to claim 1 or 2, characterized in that the flow tube has two curved parts (12 and 13) and an intermediate straight tube section (15) and one or more straight tube heating elements (2, 3) in this straight tube section (15 ) are arranged with ends (8, 9 or 10, 11) projecting on the curved parts (12, 13) of the flow tube (1). 6. Durchlauferhitzer nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß zum dichten Herausführen der Anschlußenden (8, 9) bzw. (10, 11) des bzw. der Rohrheizkörper (2, 3) das Mantelrohr des Rohrheizkörpers (2 bzw. 3) mit dem Durchlaufrohr (1) verlötet ist.6. instantaneous water heater according to one of claims 1 to 5, characterized in that for sealingly leading out the connection ends (8, 9) or (10, 11) of the tubular heater (2, 3) the jacket tube of the tubular heater (2 or 3) is soldered to the flow tube (1). 7. Durchlauferhitzer nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Mantelrohr (16) des Rohrheizkörpers (2, 3) und das Durchlaufrohr (1) aus Chromnickelstahl bestehen.7. instantaneous water heater according to one of claims 1 to 6, characterized in that the jacket tube (16) of the tubular heater (2, 3) and the continuous tube (1) consist of chromium-nickel steel. 8. Durchlauferhitzer nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet , daß der Durchmesser des Durchlauf rohres (1) zum Einstecken in den Wasserschlauch (4, 5) zumindest an den Anschlußenden (6, 7) demDurchmesser des Wasserschlauches (4, 5) angepaßt ist.8. water heater according to one of claims 1 to 7, characterized in that the diameter of the flow tube (1) for insertion into the water hose (4, 5) at least at the connection ends (6, 7) is adapted to the diameter of the water hose (4, 5). 9. Durchlauferhitzer nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß an der Außenseite des Durchlaufrohres (1) als Trockengehschutz ein Bimetallschalter (17) angeordnet ist, der den Versorgungsstromkreis für den bzw. die Rohrheizkörper (2, 3) schließt oder unterbricht.9. instantaneous water heater according to one of claims 1 to 8, characterized in that on the outside of the continuous tube (1) a bimetal switch (17) is arranged as dry-running protection, which closes or interrupts the supply circuit for the tubular heater (2, 3) .
EP82108528A 1981-09-25 1982-09-16 Continuous-flow heater Expired EP0075274B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82108528T ATE12308T1 (en) 1981-09-25 1982-09-16 INSTANTANEOUS HEATER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3138293 1981-09-25
DE19813138293 DE3138293A1 (en) 1981-09-25 1981-09-25 CONTINUOUS HEATER

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EP0075274A1 true EP0075274A1 (en) 1983-03-30
EP0075274B1 EP0075274B1 (en) 1985-03-20

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EP (1) EP0075274B1 (en)
AT (1) ATE12308T1 (en)
DE (2) DE3138293A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3412390A1 (en) * 1984-04-03 1985-10-10 Fritz Eichenauer GmbH & Co KG, 6744 Kandel Flow heater
GB2158927A (en) * 1984-04-24 1985-11-20 Imi Santon Ltd Electric flow heaters
DE4219643A1 (en) * 1992-06-16 1993-12-23 Kulmbacher Klimageraete Arrangement and method for assembling an electrical instantaneous water heater
GB2270370A (en) * 1992-09-07 1994-03-09 Caradon Mira Ltd Instantaneous electric water heater
US5396574A (en) * 1992-03-26 1995-03-07 Process Technology, Inc. Tubular high efficiency, non-contaminating fluid heater
EP1029501A1 (en) * 1999-02-15 2000-08-23 CANDY S.p.A. A dishwasher with a radiant heater
EP2443982A3 (en) * 2012-01-27 2012-08-22 V-Zug AG Household appliance with water heating unit
IT201800003914A1 (en) * 2018-03-26 2019-09-26 Irca Spa FLUID HEATING DEVICE FOR HOUSEHOLD APPLIANCES

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19915110A1 (en) * 1999-04-01 2000-10-05 Aweco Appliance Sys Gmbh & Co Dishwasher has riser line leading out of washing chamber and throughflow heater with tubular housing for heating liquid using an internal heating element incorporated into riser pipe

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FR1556294A (en) * 1967-12-12 1969-02-07
DE2440426A1 (en) * 1974-08-23 1976-03-04 Czepek & Co Electric flow heater has inner axial heating tube - with liquid circulating around it inside outer coaxial tubular jacket
DE2455326A1 (en) * 1974-11-22 1976-05-26 Licentia Gmbh Continuous flow heater for domestic coffee making machine - has circular water pipe under base plate
FR2331232A1 (en) * 1975-11-07 1977-06-03 Foa Michel Thermoplastic heating vessel for corrosive liquids - has hot water flowing through heat exchange pipes over which liquid flows

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Publication number Priority date Publication date Assignee Title
US3130737A (en) * 1962-10-09 1964-04-28 Gen Electric Automatic dishwashing appliance

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1556294A (en) * 1967-12-12 1969-02-07
DE2440426A1 (en) * 1974-08-23 1976-03-04 Czepek & Co Electric flow heater has inner axial heating tube - with liquid circulating around it inside outer coaxial tubular jacket
DE2455326A1 (en) * 1974-11-22 1976-05-26 Licentia Gmbh Continuous flow heater for domestic coffee making machine - has circular water pipe under base plate
FR2331232A1 (en) * 1975-11-07 1977-06-03 Foa Michel Thermoplastic heating vessel for corrosive liquids - has hot water flowing through heat exchange pipes over which liquid flows

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3412390A1 (en) * 1984-04-03 1985-10-10 Fritz Eichenauer GmbH & Co KG, 6744 Kandel Flow heater
GB2158927A (en) * 1984-04-24 1985-11-20 Imi Santon Ltd Electric flow heaters
US5396574A (en) * 1992-03-26 1995-03-07 Process Technology, Inc. Tubular high efficiency, non-contaminating fluid heater
DE4219643A1 (en) * 1992-06-16 1993-12-23 Kulmbacher Klimageraete Arrangement and method for assembling an electrical instantaneous water heater
GB2270370A (en) * 1992-09-07 1994-03-09 Caradon Mira Ltd Instantaneous electric water heater
GB2270370B (en) * 1992-09-07 1996-06-12 Caradon Mira Ltd Heat exchanger
EP1029501A1 (en) * 1999-02-15 2000-08-23 CANDY S.p.A. A dishwasher with a radiant heater
EP2443982A3 (en) * 2012-01-27 2012-08-22 V-Zug AG Household appliance with water heating unit
IT201800003914A1 (en) * 2018-03-26 2019-09-26 Irca Spa FLUID HEATING DEVICE FOR HOUSEHOLD APPLIANCES

Also Published As

Publication number Publication date
DE3138293A1 (en) 1983-07-14
EP0075274B1 (en) 1985-03-20
ATE12308T1 (en) 1985-04-15
DE3262687D1 (en) 1985-04-25

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