EP1003190A2 - Water heater for heating water - Google Patents

Water heater for heating water Download PDF

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Publication number
EP1003190A2
EP1003190A2 EP99121461A EP99121461A EP1003190A2 EP 1003190 A2 EP1003190 A2 EP 1003190A2 EP 99121461 A EP99121461 A EP 99121461A EP 99121461 A EP99121461 A EP 99121461A EP 1003190 A2 EP1003190 A2 EP 1003190A2
Authority
EP
European Patent Office
Prior art keywords
conductor
connecting bolt
water heater
loop
bolt
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.)
Granted
Application number
EP99121461A
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German (de)
French (fr)
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EP1003190B1 (en
EP1003190A3 (en
Inventor
Volker Herz
Andreas Birk
Karl-Heinz Kamprath
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.)
Braun GmbH
Original Assignee
Braun GmbH
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Filing date
Publication date
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Publication of EP1003190A2 publication Critical patent/EP1003190A2/en
Publication of EP1003190A3 publication Critical patent/EP1003190A3/en
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Publication of EP1003190B1 publication Critical patent/EP1003190B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00Thermally-actuated switches
    • H01H37/74Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material

Definitions

  • the present invention relates to a water heater for heating water for the domestic need according to the preamble of claim 1.
  • Such a water heater with a safety device is in DE-196 05 187 A1 is described and is e.g. used in coffee and tea machines.
  • a safety switch which in In cooperation with the temperature controller, the power supply to the household appliance Temperature limit case and interrupts in the event of an error.
  • this is temperature protection sufficient to e.g. if the temperature controller fails, which is usually the case is equipped with a bimetal to separate from the electrical supply.
  • connection element consists of a flat soldering shoe, which has a firm connection from the connecting bolt due to the larger soldering area to the conductor with the participation of the solder.
  • the connecting element previously used is no longer required.
  • the shape of the conductor end according to the invention makes it possible for the space enclosed by the end of the conductor is completely or largely completely filled with solder is, especially because liquid solder surfaces up to a certain Size (drop size) can span and this surge lasts until the Lot cooled and hard. In addition, this is safe for automatic manufacturing Positioning advantageous.
  • the wire can also be the connecting bolt via a or partially enclose several sections, which are then intimate during the soldering process Make the soldered connection with the connecting bolt.
  • connection end of the conductor Due to the special shape of the connection end of the conductor, the soldering surface is between enlarged the conductor end and the contact tab of the heater. Lets be particularly advantageous apply the invention to round conductors in cross section (claim 2). But there are oval, rectangular or other cross-section connecting bolts are also possible, on the outer surface of the course of the conductor end essentially over a or several sub-areas are adapted.
  • a round or oval wire offers a connection surface that is partially closed all around on the connecting bolts.
  • the conductor corresponds to the patent claims 3 and 4 is designed.
  • the above can be Realize features in a particularly simple and effective manner, the head end being the Surrounds the outer surface of the connecting bolt only over a certain partial area or there entirely or partially due to non-circular manufacturing tolerances with its sub-area abuts the outer surface of the connecting bolt.
  • solder joint in a sufficient distance from the end of the connecting bolt Direction of the heating element is arranged and the conductor the end of the connecting bolt not towered over.
  • the flow heater 22 shown in FIG. 1 consists of a water pipe 20 with which a heating element 30 is in close thermal contact. As can be seen from Fig. 1, protrude the heating element 30 with the electrical insulation 31 and 32, in cross section circular connecting bolts 12 and 14 out, with the insulating in the heating element 30 embedded heating wires (not shown) are connected.
  • the security device consists of the conductor 1, the one at a first connection point 40 on the water heater 22 is fixed in place 21 fixed thermoregulator 24.
  • the thermoregulator 24 regulates the temperature of the instantaneous water heater 22 Power supply from the controller 24 via the conductor 1 to the connecting bolt 12 and thus to Heating wire led.
  • the conductor 1 consisting of a spring wire is shown in FIG. 1 in its course with a U-shaped deformation 41 provided; their meaning is in the above DE-196 05 187 A1 described in detail, the content of which is expressly included in the present Description is included.
  • connection point 10 For the connection of the conductor 1 to the heating element 30, the connecting bolt 12 is connected a second connection point 10, as shown in Figures 1 to 4. To this Junction 10 towards the conductor 1 is pressed resiliently during manufacture and over a large area soldered by solder, but this is only hinted at in Fig. 2.
  • the end 23 of the conductor 1 is loop-shaped Shaped flat, so that a sufficiently large, defined, from Lot 15 to wetting surface 11 (Fig. 3), which is further supported by the fact that Contact surfaces (not shown) at the connection point 10, that is to say that of the conductor 1 and that of the connecting bolt 12, fit together in contour and lie flush against each other.
  • the solder 15 is also not shown in FIG. 4.
  • FIGS. 2 and 4 show the simple shaping which is favorable in terms of production technology of the conductor 1 shown on an enlarged scale, with which a surface 11 span lets, which enables the safe, predetermined flow of the solder 15 and a reliable Large area connection between the conductor 1 and the connecting bolt 12 guaranteed.
  • the conductor 1 is bent into a loop 13 at the end concerned, which encloses the room 11, as also shown in FIG. 3. 4 remove that the two parallel to the connecting pin 12 legs 131 and 132 will lead to a secure soldered connection if 11 Lot 15 adhered by the legs 131 and 132 and the connecting bolt 12 (not shown). This also contributes to the U-shaped around the connecting bolt 12 and to his Contour adapted connecting web 133 at.
  • the exact determination of the shape of the loop 13 taking into account the dimensions of the components, i.e. the respective diameter (Wire) and other dimensions.
  • the shape of the loop 13 is, as can also be seen is selected so that it runs upwards so that accidental snagging with the connecting bolt 12 is safely prevented. This also serves in particular for this Loop end 135 running transversely to the connecting bolt 12, at the beginning of the loop 134 is returned. This way it slips even when bending down of the conductor 1 the loop 13 accidentally gets under the connecting bolt 12, this sideways to the right and after letting go up again, so that they again easily can be placed on the connecting bolt 12, as shown in FIG. 4.
  • the shape of the Loop start 134, the loop end 135 and the U-shaped upward Connecting web 133 are chosen so that before the soldering process shown in Fig. 4 Position a lateral sliding on the connecting bolt 12 is not possible because the U-shaped connecting web 133 on the approximately matched diameter connecting bolts 12 centered.
  • the length of the conductor 1 is chosen so that the loop 13 in front of the free end of the connecting bolt 12 ends around this when the conductor 1 is pressed down with the connecting web 133 in this case too. This is particularly the case with Automated manufacturing necessary to hook the loop 13 under the connecting bolt 12 to prevent.
  • the loop 13 is shaped in size so that the conductor 1 with the loop 13 does not protrude beyond the end of the connecting bolt 12, like this show all figures.
  • the solder flows into the between the Loop 13 and the connecting bolt 12 formed gap. This is the diameter of the connecting web 133 slightly larger than the diameter of the connecting bolt 12th

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Resistance Heating (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Surgical Instruments (AREA)
  • External Artificial Organs (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Cookers (AREA)

Abstract

The heater has a flow conductor (1) with a solder connection (10) at one end. The connection point is in the form of a connecting bolt (12) and the end (23) of the conductor soldered to the bolt essentially matches the outer contour of the bolt in one or more regions. The connecting bolt is of circular cross-section.

Description

Die vorliegende Erfindung betrifft einen Durchlauferhitzer zum Erwärmen von Wasser für den häuslichen Bedarf nach dem Oberbegriff des Anspruchs 1.The present invention relates to a water heater for heating water for the domestic need according to the preamble of claim 1.

Eine derartiger Durchlauferhitzer mit einer Sicherheitseinrichtung ist in der DE-196 05 187 A1 beschrieben und wird z.B. in Kaffee- und Teemaschinen verwendet. Für den normalen Betrieb sind derartige Haushaltsgeräte mit einem Sicherheitsschalter ausgestattet, der im Zusammenwirken mit dem Temperaturregler die Stromversorgung des Haushaltsgerätes im Temperaturgrenzfall und im Fehlerfall unterbricht. In der Regel ist diese Temperatursicherung ausreichend, um das Gerät z.B. beim Ausfall des Temperaturreglers, der üblicherweise mit einem Bimetall ausgestattet ist, von der elektrischen Versorgung zu trennen. Wenn allerdings bei einer ungünstigen Phasenlage und defektem Temperaturregler ein Kurzschluß auftritt, dergestalt, daß Heizleiterbereiche eines Rohrheizkörpers elektrisch mit einem Schutzleiter verbunden sind, dann kann ein unkontrolliertes Aufheizen des Rohrheizkörpers stattfinden und zur Gefährdung der Umgebung führen.Such a water heater with a safety device is in DE-196 05 187 A1 is described and is e.g. used in coffee and tea machines. For the normal Operation of such household appliances are equipped with a safety switch, which in In cooperation with the temperature controller, the power supply to the household appliance Temperature limit case and interrupts in the event of an error. As a rule, this is temperature protection sufficient to e.g. if the temperature controller fails, which is usually the case is equipped with a bimetal to separate from the electrical supply. If so in the case of an unfavorable phase position and defective temperature controller, a short circuit occurs, such that the heating conductor areas of a tubular heater are electrically connected to a Protective conductors are connected, then an uncontrolled heating of the tubular heater take place and endanger the environment.

Zur Beherrschung eines solchen Fehlerfalles wird in der eingangs genannten DE 196 05 187 A1 eine Temperatursicherung beschrieben, bei der ein unter mechanischer Vorspannung stehender, durch Schmelzen des Lotes sich lösender Leiter die Stromzuführung zu dem Rohrheizkörper des Durchlauferhitzers unterbricht. Allerdings erfordert die vorstehend erwähnte Lösung ein besonderes, die Lötstelle tragendes Verbindungselement zu dem Anschlußbolzen des Rohrheizkörpers. Hierbei besteht das Verbindungselement aus einem flachen Lötschuh, der durch die größere Lötfläche eine feste Verbindung vom Anschlußbolzen zum Leiter unter Mitwirkung vom Lot herstellt. Abgesehen vom zusätzlichen Materialaufwand führt die Anwendung eines solchen Verbindungselementes zu vermehrtem Fertigungsaufwand, insbesondere muß das Lötende flach und breit ausgebildet sein. Dies stellt bei einem runden und verhältnismäßig dünnen Draht ein Problem dar.To control such an error case is mentioned in the above DE 196 05 187 A1 describes a temperature fuse in which a mechanical Biasing conductor, which is released by melting the solder, the power supply to the tubular heater of the instantaneous water heater. However, the above requires mentioned solution to a special connecting element carrying the solder joint the connecting bolt of the tubular heater. Here, the connection element consists of a flat soldering shoe, which has a firm connection from the connecting bolt due to the larger soldering area to the conductor with the participation of the solder. Aside from the extra The use of such a connecting element leads to increased material expenditure Manufacturing effort, in particular the soldering end must be flat and wide. This is a problem with a round and relatively thin wire.

Es liegt daher der vorliegenden Erfindung die Aufgabe zugrunde, den Durchlauferhitzer baulich im Sinne der Fertigung zu vereinfachen, ohne den erreichten Stand der Funktionssicherheit zu beeinträchtigen und gleichzeitig deren Funktionalität und Sicherheit zu erhöhen. It is therefore the object of the present invention to construct the instantaneous water heater to simplify in the sense of production, without the achieved level of functional reliability to impair and at the same time increase their functionality and security.

Diese Aufgabe wird bei dem Durchlauferhitzer der eingangs beschriebenen Art durch die im Patentanspruch 1 genannten Merkmale gelöst. Durch die unmittelbare Verlötung des Leiters mit dem Anschlußbolzen des Heizelements infolge der speziellen Formgebung des Anschlußendes des Leiters ist das bisher verwendete Verbindungselement nicht mehr erforderlich. Durch die erfindungsgemäße Formgebung des Leiterendes wird es möglich, daß der von dem Leiterende eingeschlossene Raum voll oder weitgehendst voll mit Lot ausgefüllt wird, und dies insbesondere deshalb, weil flüssiges Lot Flächen bis zu einer bestimmten Größe (Tropfengröße) überspannen kann und diese Überspannung so lange hält, bis das Lot abgekühlt und hart ist. Außerdem ist dies bei der automatischen Fertigung für eine sichere Positionierung vorteilhaft. Dabei kann der Draht auch den Anschlußbolzen über einen oder mehrere Teilabschnitte teilweise umschließen, die dann beim Lötvorgang eine innige Lötverbindung mit dem Anschlußbolzen herstellen.This task is in the water heater of the type described in the Features mentioned claim solved. Through the direct soldering of the conductor with the connecting bolt of the heating element due to the special shape of the connecting end of the conductor, the connecting element previously used is no longer required. The shape of the conductor end according to the invention makes it possible for the space enclosed by the end of the conductor is completely or largely completely filled with solder is, especially because liquid solder surfaces up to a certain Size (drop size) can span and this surge lasts until the Lot cooled and hard. In addition, this is safe for automatic manufacturing Positioning advantageous. The wire can also be the connecting bolt via a or partially enclose several sections, which are then intimate during the soldering process Make the soldered connection with the connecting bolt.

Durch die spezielle Formgebung des Anschlußendes des Leiters wird die Lötfläche zwischen dem Leiterende und der Kontaktfahne der Heizung vergrößert. Besonders vorteilhaft läßt sich die Erfindung bei im Querschnitt runden Leitern anwenden (Anspruch 2). Es sind aber auch ovale, rechteckige oder sonst wie im Querschnitt ausgebildete Anschlußbolzen möglich, an deren äußere Mantelfläche der Verlauf des Leiterendes im wesentlichen über einen oder mehrere Teilbereiche angepaßt sind.Due to the special shape of the connection end of the conductor, the soldering surface is between enlarged the conductor end and the contact tab of the heater. Lets be particularly advantageous apply the invention to round conductors in cross section (claim 2). But there are oval, rectangular or other cross-section connecting bolts are also possible, on the outer surface of the course of the conductor end essentially over a or several sub-areas are adapted.

Ein runder oder ovaler Draht bietet allerdings eine teilweise rundum geschlossene Anbindungsfläche an den Anschlußbolzen.However, a round or oval wire offers a connection surface that is partially closed all around on the connecting bolts.

Fertigungstechnisch ist es weiterhin vorteilhaft, daß der Leiter entsprechend den Patentansprüchen 3 und 4 gestaltet ist. Durch diese Maßnahmen lassen sich die vorstehend genannten Merkmale besonders einfach und effektiv verwirklichen, wobei das Leiterende die Mantelfläche des Anschlußbolzens nur über einen bestimmten Teilbereich umgibt bzw. dort ganz oder aufgrund von unrunden Fertigungstoleranzen nur teilweise mit seinem Teilbereich an der Mantelfläche des Anschlußbolzens anliegt.From a manufacturing point of view, it is also advantageous that the conductor corresponds to the patent claims 3 and 4 is designed. Through these measures, the above can be Realize features in a particularly simple and effective manner, the head end being the Surrounds the outer surface of the connecting bolt only over a certain partial area or there entirely or partially due to non-circular manufacturing tolerances with its sub-area abuts the outer surface of the connecting bolt.

Insbesondere unter dem Gesichtspunkt einer automatisierten Fertigung und zur zuverlässigen Plazierung des Leiters auf dem Anschlußbolzen ist weiterhin im Patentanspruch 5 vorgesehen, daß die Lötstelle in ausreichendem Abstand vom Ende des Anschlußbolzens in Richtung des Heizelementes angeordnet ist und der Leiter das Ende des Anschlußbolzens nicht überragt.Especially from the point of view of automated production and reliable Placement of the conductor on the connection bolt is further provided in claim 5, that the solder joint in a sufficient distance from the end of the connecting bolt Direction of the heating element is arranged and the conductor the end of the connecting bolt not towered over.

Insgesamt ist es für die angegebenen Lösungen vorteilhaft, wenn der Leiter ein im Querschnitt runder Federdraht ist.Overall, it is advantageous for the solutions given if the conductor has a cross section is round spring wire.

Durch die Merkmale des Anspruchs 6 wird eine Einsparung an erforderlichen Bauteilen und eine daraus resultierende Vereinfachung der Herstellung und der Montage des Durchlauferhitzers unter der guten Einhaltung der vorgegebenen Abreißwerte im Fehlerfall erreicht. Durch die erfindungsgemäße großflächige Verlötung mittels Runddrähte wird eine stabile Sicherheitseinrichtung einer zusätzlich als Schmelzsicherung arbeitenden Verbindungsstelle erreicht.By the features of claim 6, a saving in required components and a resulting simplification of the manufacture and assembly of the instantaneous water heater achieved with good adherence to the specified tear values in the event of an error. The large-area soldering by means of round wires according to the invention makes a stable one Safety device of a connection point additionally functioning as a fuse reached.

Weitere Details und Vorteile der Sicherheitseinrichtung gemäß der Erfindung ergeben sich aus der Beschreibung der in den beigefügten Zeichnungen dargestellten Ausführungsbeispiele.

Fig. 1
zeigt schematisch die wesentlichen Teile eines Durchlauferhitzers mit am Zapfen einerseits gegen eine Federkraft aufgesetztem Drahtende nach der Erfindung direkt vor dem Lötvorgang, sowie andererseits ein vom Zapfen entferntes Drahtende, bevor dieses nach unten gedrückt wird,
Fig. 2
zeigt einen Ausschnitt des Ausführungsbeispiels der Verbindungsstelle nach Fig. 1 mit den wesentlichen Elementen im Bereich der Anschlußstelle in vergrößertem Maßstab, allerdings nach der Verlötung gemäß der Erfindung, die gleichzeitig als Sicherheitseinrichtung dient,
Fig. 3
zeigt eine schematische Darstellung vor und nach dem Anlegen des Endes des Leiters an der Anschlußstelle gemäß Fig. 1, allerdings hierbei von unten her auf den Durchlauferhitzer gesehen und
Fig. 4
zeigt eine perspektivische Teilansicht von vorne auf das linke Ende des Durchlauferhitzers gemäß der Pfeilrichtung X nach Fig. 1, in sehr vergrößertem Maßstab, allerdings nur mit am Anschlußbolzen aufgesetzter Schlaufe.
Further details and advantages of the safety device according to the invention result from the description of the exemplary embodiments shown in the accompanying drawings.
Fig. 1
schematically shows the essential parts of a continuous-flow heater with the wire end according to the invention placed on the pin against a spring force directly before the soldering process, and also a wire end removed from the pin before it is pressed down,
Fig. 2
1 shows a detail of the exemplary embodiment of the connection point according to FIG. 1 with the essential elements in the area of the connection point on an enlarged scale, but after the soldering according to the invention, which also serves as a safety device,
Fig. 3
shows a schematic representation before and after the application of the end of the conductor at the connection point according to FIG. 1, but seen from below on the instantaneous water heater and
Fig. 4
shows a perspective partial view from the front of the left end of the water heater according to the direction of arrow X of FIG. 1, in a very enlarged scale, but only with a loop attached to the connecting bolt.

Der Durchlauferhitzer 22 gemäß Fig. 1 besteht aus einem Wasserrohr 20, mit dem ein Heizelement 30 in engem thermischen Kontakt steht. Wie aus Fig. 1 ersichtlich ist, ragen aus dem Heizelement 30 die mit der elektrischen Isolation 31 und 32 umgebenen, im Querschnitt kreisförmigen Anschlußbolzen 12 und 14 heraus, die mit den im Heizelement 30 isolierend eingebetteten Heizdrähten (nicht dargestellt) verbunden sind. Die Sicherheitseinrichtung besteht aus dem Leiter 1, der an einer ersten Anschlußstelle 40 eines am Durchlauferhitzer 22 an der Stelle 21 befestigten Thermoreglers 24 ortsfest befestigt ist. Der Thermoregler 24 regelt die Temperatur des Durchlauferhitzers 22. Über die Anschlußstelle 40 wird auch die Stromzuführung vom Regler 24 über den Leiter 1 zum Anschlußbolzen 12 und somit zum Heizdraht geführt.The flow heater 22 shown in FIG. 1 consists of a water pipe 20 with which a heating element 30 is in close thermal contact. As can be seen from Fig. 1, protrude the heating element 30 with the electrical insulation 31 and 32, in cross section circular connecting bolts 12 and 14 out, with the insulating in the heating element 30 embedded heating wires (not shown) are connected. The security device consists of the conductor 1, the one at a first connection point 40 on the water heater 22 is fixed in place 21 fixed thermoregulator 24. The thermoregulator 24 regulates the temperature of the instantaneous water heater 22 Power supply from the controller 24 via the conductor 1 to the connecting bolt 12 and thus to Heating wire led.

Der aus einem Federdraht bestehende Leiter 1 ist nach Fig. 1 in seinem Verlauf mit einer U-förmigen Verformung 41 versehen; deren Bedeutung ist in der eingangs genannten DE-196 05 187 A1 ausführlich dargestellt, deren Inhalt insoweit ausdrücklich in die vorliegende Beschreibung aufgenommen wird.The conductor 1 consisting of a spring wire is shown in FIG. 1 in its course with a U-shaped deformation 41 provided; their meaning is in the above DE-196 05 187 A1 described in detail, the content of which is expressly included in the present Description is included.

Für die Verbindung des Leiters 1 mit dem Heizelement 30 ist der Anschlußbolzen 12 mit einer zweiten Anschlußstelle 10 versehen, wie dies die Figuren 1 bis 4 zeigen. Zu dieser Anschlußstelle 10 hin wird der Leiter 1 bei der Fertigung federnd hingedrückt und großflächig durch Lot angelötet, was aber nur in Fig. 2 andeutungsweise dargestellt ist.For the connection of the conductor 1 to the heating element 30, the connecting bolt 12 is connected a second connection point 10, as shown in Figures 1 to 4. To this Junction 10 towards the conductor 1 is pressed resiliently during manufacture and over a large area soldered by solder, but this is only hinted at in Fig. 2.

Bei einer Überhitzung des Heizelementes infolge eines Defektes, z. B. eines Kurzschlusses, tritt eine starke Erhitzung im Bereich der Anschlußstelle 10 des Anschlußbolzens 12 auf. Damit wird das im Bereich des schlaufenförmigen Endes 23 des Leiters 1 beim Lötvorgang sich ansammelnde Lot (Fig. 2) erweicht und schmilzt. Da der Leiter 1 mit einer Vorspannung zum Anschlußbolzen 12 hingedrückt und verlötet ist, federt der Leiter 1 bei geschmolzenem Lot 15 von dem Anschlußbolzen 12 weg und der Stromfluß wird dadurch unterbrochen; es findet damit auch keine weitere Aufheizung statt. In Fig. 2 sind jeweils beide Zustände des Leiters 1 dargestellt, also der mit dem Anschlußbolzen 12 durch Lot 15 verlötete Zustand des Leiters 1 und der von dem Anschlußbolzen 12 getrennte und wegbewegte Zustand des Leiters 1'. In den Figuren 1 und 3 sind auch zwei Zustände des Leiters 1 dargestellt, allerdings nur der an dem Anschlußbolzen 12 anliegende Leiter 1 vor dem Lötvorgang und der von dem Anschlußbolzen 12 entfernte Leiter 1'. If the heating element overheats due to a defect, e.g. B. a short circuit, strong heating occurs in the area of the connection point 10 of the connection bolt 12. This is in the area of the loop-shaped end 23 of the conductor 1 during the soldering process accumulating solder (Fig. 2) softens and melts. Since the conductor 1 with a bias is pressed to the connecting bolt 12 and soldered, the conductor 1 springs when melted Lot 15 away from the connecting bolt 12 and the current flow is interrupted; it there is therefore no further heating. In Fig. 2, both states of the Conductor 1 shown, that is, the state soldered to the connecting pin 12 by solder 15 of the conductor 1 and the state of the Conductor 1 '. In Figures 1 and 3, two states of the conductor 1 are also shown, however only the conductor 1 resting on the connecting bolt 12 before the soldering process and the conductor 1 'removed from the connecting bolt 12.

Wie man aus der Fig. 4 entnimmt, ist das Ende 23 des Leiters 1 durch die schlaufenförmige Formgebung flächig ausgebildet, damit eine ausreichend große, definierte, vom Lot 15 zu benetzende Fläche 11 (Fig. 3) entsteht, was zusätzlich dadurch unterstützt wird, daß die Anlageflächen (nicht dargestellt) an der Anschlußstelle 10, also diejenige des Leiters 1 und diejenige des Anschlußbolzens 12, konturmäßig zusammenpassen und so bündig aneinanderliegen. In Fig. 4 ist auch das Lot 15 nicht dargestellt.As can be seen from FIG. 4, the end 23 of the conductor 1 is loop-shaped Shaped flat, so that a sufficiently large, defined, from Lot 15 to wetting surface 11 (Fig. 3), which is further supported by the fact that Contact surfaces (not shown) at the connection point 10, that is to say that of the conductor 1 and that of the connecting bolt 12, fit together in contour and lie flush against each other. The solder 15 is also not shown in FIG. 4.

In den Figuren 2 und 4 ist die einfache und fertigungstechnisch günstig ausgestaltete Formung des Leiters 1 in vergrößertem Maßstab gezeigt, mit der sich eine Fläche 11 aufspannen läßt, die den sicheren, vorgegebenen Fluß des Lotes 15 ermöglicht und einen betriebssicheren großflächigen Anschluß zwischen dem Leiter 1 und dem Anschlußbolzen 12 gewährleistet. Dazu ist der Leiter 1 an dem betroffenen Ende zu einer Schlaufe 13 gebogen, die den Raum 11 einschließt, wie dies auch Fig. 3 zeigt. Man kann insbesondere der Fig. 4 entnehmen, daß die beiden parallel zum Anschlußbolzen 12 verlaufenden Schenkel 131 und 132 zu einer sicheren Lötverbindung führen werden, wenn an den zugewandten Flächen 11 von den Schenkeln 131 und 132 und dem Anschlußbolzen 12 Lot 15 anhaftet (nicht dargestellt). Dazu trägt auch der um den Anschlußbolzen 12 U-förmig herumgeführte und an seine Kontur angepaßte Verbindungssteg 133 bei. Die exakte Bestimmung der Form der Schlaufe 13 wird unter Berücksichtigung der Maße der Bauteile, d.h. der jeweiligen Durchmesser (Draht) und sonstiger Maße getroffen. Die Form der Schlaufe 13 ist, wie ebenfalls erkennbar ist, so nach oben verlaufend gewählt, daß ein unabsichtliches Verhaken mit dem Anschlußbolzen 12 sicher verhindert wird. Hierzu dient insbesondere auch noch das im wesentlichen quer zum Anschlußbolzen 12 nach oben verlaufende Schlaufenende 135, das zum Schlaufenanfang 134 zurückgeführt wird. Auf diese Weise rutscht auch dann, wenn beim Herunterbiegen des Leiters 1 die Schlaufe 13 ungewollt unter den Anschlußbolzen 12 gerät, diese seitlich nach rechts weg und nach Loslassen wieder nach oben, so daß sie erneut problemlos auf den Anschlußbolzen 12 aufgesetzt werden kann, wie dies Fig. 4 zeigt. Die Form des Schlaufenanfangs 134, des Schlaufenendes 135 und des U-förmig nach oben verlaufenden Verbindungssteges 133 sind so gewählt, daß vor dem Lötvorgang in der in Fig. 4 dargestellten Stellung ein seitliches Abgleiten am Anschlußbolzen 12 nicht möglich ist, weil sich der U-förmige Verbindungssteg 133 auf den im Durchmesser etwa angepaßten Anschlußbolzen 12 zentriert. FIGS. 2 and 4 show the simple shaping which is favorable in terms of production technology of the conductor 1 shown on an enlarged scale, with which a surface 11 span lets, which enables the safe, predetermined flow of the solder 15 and a reliable Large area connection between the conductor 1 and the connecting bolt 12 guaranteed. For this purpose, the conductor 1 is bent into a loop 13 at the end concerned, which encloses the room 11, as also shown in FIG. 3. 4 remove that the two parallel to the connecting pin 12 legs 131 and 132 will lead to a secure soldered connection if 11 Lot 15 adhered by the legs 131 and 132 and the connecting bolt 12 (not shown). This also contributes to the U-shaped around the connecting bolt 12 and to his Contour adapted connecting web 133 at. The exact determination of the shape of the loop 13 taking into account the dimensions of the components, i.e. the respective diameter (Wire) and other dimensions. The shape of the loop 13 is, as can also be seen is selected so that it runs upwards so that accidental snagging with the connecting bolt 12 is safely prevented. This also serves in particular for this Loop end 135 running transversely to the connecting bolt 12, at the beginning of the loop 134 is returned. This way it slips even when bending down of the conductor 1 the loop 13 accidentally gets under the connecting bolt 12, this sideways to the right and after letting go up again, so that they again easily can be placed on the connecting bolt 12, as shown in FIG. 4. The shape of the Loop start 134, the loop end 135 and the U-shaped upward Connecting web 133 are chosen so that before the soldering process shown in Fig. 4 Position a lateral sliding on the connecting bolt 12 is not possible because the U-shaped connecting web 133 on the approximately matched diameter connecting bolts 12 centered.

Die Länge des Leiters 1 ist so gewählt, daß die Schlaufe 13 vor dem freien Ende des Anschlußbolzens 12 endet, um diesen beim Herunterdrücken des Leiters 1 mit dem Verbindungssteg 133 auch in diesem Fall nicht untergreifen zu können. Dies ist insbesondere bei automatisierter Fertigung notwendig, um ein Unterhaken der Schlaufe 13 unter dem Anschlußbolzen 12 zu verhindern. Ebenso ist die Schlaufe 13 in ihrer Größe so geformt, daß der Leiter 1 mit der Schlaufe 13 nicht das Ende des Anschlußbolzens 12 überragt, wie dies alle Figuren zeigen. Beim Lötvorgang fließt das Lot (nicht dargestellt) in den zwischen der Schlaufe 13 und dem Anschlußbolzen 12 ausgebildeten Spalt. Hierzu ist der Durchmesser des Verbindungsstegs 133 geringfügig größer als der Durchmesser des Anschlußbolzens 12.The length of the conductor 1 is chosen so that the loop 13 in front of the free end of the connecting bolt 12 ends around this when the conductor 1 is pressed down with the connecting web 133 in this case too. This is particularly the case with Automated manufacturing necessary to hook the loop 13 under the connecting bolt 12 to prevent. Likewise, the loop 13 is shaped in size so that the conductor 1 with the loop 13 does not protrude beyond the end of the connecting bolt 12, like this show all figures. During the soldering process, the solder (not shown) flows into the between the Loop 13 and the connecting bolt 12 formed gap. This is the diameter of the connecting web 133 slightly larger than the diameter of the connecting bolt 12th

In praktischen Versuchen mit dieser Sicherheitseinrichtung hat sich auch gezeigt, daß das Ansprechverhalten der Sicherung gegenüber bisherigen bekannten Lösungen verbessert ist, weil durch das teilweise Herumgreifen der Schlaufe 13 um den Anschlußbolzen 12 eine größere, mit mehr Wärme beaufschlagbare Kontaktfläche gebildet wird. Sobald also der Schmelzpunkt bei Überhitzung des Durchlauferhitzers vom Lot erreicht ist, entfernt sich schlagartig der Leiter 1 von dem Anschlußbolzen 12 und der Strom ist unterbrochen. Hierdurch werden Brandfälle vermieden, wenn der normale Temperaturregler defekt ist.Practical tests with this safety device have also shown that the Response of the fuse is improved compared to previous known solutions, because by partially reaching around the loop 13 around the connecting bolt 12, a larger, contact surface with more heat is formed. So as soon as the Melting point is reached when the instantaneous water heater overheats abruptly the conductor 1 of the connecting bolt 12 and the current is interrupted. Hereby fires are avoided if the normal temperature controller is defective.

Claims (6)

Durchlauferhitzer (22) zum Erhitzen von Wasser für den häuslichen Bedarf mit einem stromführenden Leiter (1), der mit einem Ende an einer Anschlußstelle (10) durch Lot (15) zu einer Lötstelle (16) verlötet ist,
dadurch gekennzeichnet,
daß die Anschlußstelle (10) von einem Anschlußbolzen (12) gebildet wird und daß das an dem Anschlußbolzen (12) anzulötende Ende (23) des Leiters (1) in einem oder mehreren Teilbereichen im wesentlichen der äußeren Kontur des Anschlußbolzens (12) angepaßt ist.
Continuous-flow heater (22) for heating water for domestic use with a current-carrying conductor (1) which is soldered at one end to a connection point (10) by solder (15) to a soldering point (16),
characterized,
that the connection point (10) is formed by a connection bolt (12) and that the end (23) of the conductor (1) to be soldered to the connection bolt (12) is substantially matched to the outer contour of the connection bolt (12) in one or more partial areas .
Durchlauferhitzer nach Anspruch 1,
dadurch gekennzeichnet,
daß der Anschlußbolzen (12) im Querschnitt kreisförmig ausgebildet ist.
Water heater according to claim 1,
characterized,
that the connecting bolt (12) is circular in cross section.
Durchlauferhitzer nach Anspruch 2,
dadurch gekennzeichnet,
daß der Leiter (1) an seinem anzulötenden Ende (23) schlaufenartig gebogen ist, und daß die vom Lot (15) zu benetzende Fläche durch die Schlaufe begrenzt ist.
Instantaneous water heater according to claim 2,
characterized by
that the conductor (1) is bent like a loop at its end (23) to be soldered, and that the area to be wetted by the solder (15) is limited by the loop.
Durchlauferhitzer nach Anspruch 3,
dadurch gekennzeichnet,
daß die schlaufenartige Formung des Leiters (1) so gewählt ist, daß sich zwei Schenkel (131, 132) der Schlaufe (13) parallel zur Längsachse des Anschlußbolzens (12) erstrecken und ein Einhaken am Anschlußbolzen (12) verhindern.
Water heater according to claim 3,
characterized,
that the loop-like shape of the conductor (1) is selected so that two legs (131, 132) of the loop (13) extend parallel to the longitudinal axis of the connecting bolt (12) and prevent hooking on the connecting bolt (12).
Durchlauferhitzer nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet,
daß die Lötstelle (16) in ausreichendem Abstand vom Ende des Anschlußbolzens (12) in Richtung des Heizelementes (30) angeordnet ist, und daß der Leiter (1) das Ende des Anschlußbolzens (12) nicht überragt.
Instantaneous water heater according to one of the preceding claims,
characterized,
that the solder joint (16) is arranged at a sufficient distance from the end of the connecting bolt (12) in the direction of the heating element (30), and that the conductor (1) does not protrude beyond the end of the connecting bolt (12).
Durchlauferhitzer nach Anspruch 1,
dadurch gekennzeichnet,
daß der Leiter (1) zusätzlich mit einem ersten Ende unter einer mechanischen Vorspannung an einer weiteren ortsfesten Anschlußstelle (40) gehalten ist und daß sich der Leiter (1) im Fehlerfall bei Überhitzung des Durchlauferhitzers (22) unter Lösen der Lötstelle (16) aufgrund der Vorspannung von der zweiten Anschlußstelle (10) wegbewegt, wodurch der Stromkreis unterbrochen wird,
Water heater according to claim 1,
characterized by
that the conductor (1) is additionally held with a first end under mechanical pretension at a further fixed connection point (40) and that the conductor (1) in the event of a fault when the instantaneous water heater (22) overheats while loosening the solder joint (16) the bias voltage is moved away from the second connection point (10), whereby the circuit is interrupted,
EP99121461A 1998-11-17 1999-10-28 Water heater for heating water Expired - Lifetime EP1003190B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19852886A DE19852886A1 (en) 1998-11-17 1998-11-17 Safety device for a heating device
DE19852886 1998-11-17

Publications (3)

Publication Number Publication Date
EP1003190A2 true EP1003190A2 (en) 2000-05-24
EP1003190A3 EP1003190A3 (en) 2002-09-25
EP1003190B1 EP1003190B1 (en) 2006-06-07

Family

ID=7888009

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99121461A Expired - Lifetime EP1003190B1 (en) 1998-11-17 1999-10-28 Water heater for heating water

Country Status (5)

Country Link
US (1) US6250259B1 (en)
EP (1) EP1003190B1 (en)
AT (1) ATE329365T1 (en)
DE (2) DE19852886A1 (en)
DK (1) DK1003190T3 (en)

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CN111052236A (en) * 2017-09-06 2020-04-21 株式会社半导体能源研究所 Semiconductor device with a plurality of semiconductor chips

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DE10313861A1 (en) * 2003-03-21 2004-09-30 Bleckmann Gmbh Pre-assembled connection module
KR101014716B1 (en) 2003-12-02 2011-02-16 엘지전자 주식회사 heater assembly in microwave oven having coffee maker
JP4522752B2 (en) * 2004-06-10 2010-08-11 三菱電機株式会社 Terminal joining method by soldering
ITVE20060016U1 (en) * 2006-05-18 2007-11-19 Irca Spa HEATING ELEMENT.-

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FR1489940A (en) * 1965-07-29 1967-07-28 Philips Nv Electrical component with thermal protection
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Also Published As

Publication number Publication date
DK1003190T3 (en) 2006-10-02
EP1003190B1 (en) 2006-06-07
ATE329365T1 (en) 2006-06-15
US6250259B1 (en) 2001-06-26
EP1003190A3 (en) 2002-09-25
DE59913516D1 (en) 2006-07-20
DE19852886A1 (en) 2000-05-25

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