EP2583533B1 - Verfahren und vorrichtung zur herstellung einer heizwendel, sowie heizwendel - Google Patents

Verfahren und vorrichtung zur herstellung einer heizwendel, sowie heizwendel Download PDF

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Publication number
EP2583533B1
EP2583533B1 EP11722803.1A EP11722803A EP2583533B1 EP 2583533 B1 EP2583533 B1 EP 2583533B1 EP 11722803 A EP11722803 A EP 11722803A EP 2583533 B1 EP2583533 B1 EP 2583533B1
Authority
EP
European Patent Office
Prior art keywords
heating coil
wedge element
wedge
bending elements
elements
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.)
Not-in-force
Application number
EP11722803.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2583533A1 (de
Inventor
Gebhard Mayer
Mathias Radl
Andreas Schwaiger
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Priority to PL11722803T priority Critical patent/PL2583533T3/pl
Publication of EP2583533A1 publication Critical patent/EP2583533A1/de
Application granted granted Critical
Publication of EP2583533B1 publication Critical patent/EP2583533B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • F24H1/103—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 with bare resistances in direct contact with the fluid
    • 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
    • H05B2203/017—Manufacturing methods or apparatus for heaters

Definitions

  • the present invention relates to a method for producing a heating coil according to the preamble of patent claim 1, in which two Schuchtlschenkel are electrically connected to each other via a line bridge, and a device for deforming a heating coil according to such a method.
  • Such heating coils are used for example in water heater in bare wire technology.
  • the heating coils are positioned in heating channels and flowed around directly by the water to be heated.
  • the heating channels are as in the German patent of the applicant DE 196 51 087 C2 shown arranged parallel to each other and each end connected to each other via a deflection, so that there is a meandering orientation of the heating channels.
  • With sufficiently large water heaters the heating coils are placed with their entire winding around the deflection areas. However, this is not possible with compact instantaneous water heaters.
  • the heating coils are therefore preferably divided in their middle in two Walkerschenkel, which are then electrically connected by a line bridge again.
  • the cable bridge is usually a bent wire, which is welded or soldered at the end with the Schuetzlschenkeln.
  • the division of the heating coil in two Schuchtlschenkel and their subsequent connection via the line bridge is relatively expensive to manufacture. Furthermore, the connection points of the line bridge pose potential weak points.
  • Such heating coil and method of making these are also in the EP 1 924 126 A1 disclosed.
  • a method and an apparatus for forming a helix is in the US 2,449,653 A and in the GB 639583 A shown.
  • Object of the present invention is to provide a method and an apparatus that allows reliable positioning, damage-free processing during deformation and a damage-free removal of a heating coil with two Schuetzlschenkeln.
  • a method according to the invention for producing a heating coil with two heating coil legs, which are electrically connected to one another via a conductor bridge at least one helical turn of the heating coil forming the conductor bridge is first defined. Subsequently, the heating coil is positioned over the helical turn on a wedge element. Then dip laterally of the spiral path sections of two bending elements in the heating coil. Now at least one of the bending elements is moved until the helical turn is deformed at least in sections. Finally, the heating coil is removed from the wedge element. The heating coil is automatically positioned on the wedge element.
  • the heating coil is clamped in a receiving device, wherein the clamping process is particularly simple when the heating coil is clamped via their end-side electrical contacts in corresponding receiving elements of the receiving device.
  • the heating coil is freed after insertion of the bending elements of the receiving device, so that the heating coils are carried along during deformation free.
  • the line bridge is formed integrally with the heating coil limbs.
  • the manufacturing cost of the heating coil can be significantly reduced, since both a separation step for physically separating the Edelhauslschenkel and a subsequent connection step for electrically connecting the Edelhauslschenkel omitted via a separate line bridge.
  • the positioning of the spiral bridge forming the helical path on the wedge element can be simplified if the heating coil is stretched elastically before positioning in the longitudinal direction, so that their windings open or the individual helical turns are spaced apart.
  • the deformation of the helical turn can be simplified if at least one of the bending elements performs a pivoting movement transversely to the longitudinal axis of the heating coil.
  • the bending elements dive via a translational movement in the heating coil and at least one is then converted into a rotational movement, whereby targeted and steplessly carried out a deformation of the spiral path.
  • the flexures are positioned laterally of the selected helical turn such that they secure the heating coil to the wedging element.
  • the helical turn is clamped in this variant, as it were, between the bending elements on the wedge element and the heating coil is secured in position via the bending elements.
  • an embodiment provides for the heating coil to be pushed off or pushed off from the wedge element via a sliding element, which acts on the heating coil limbs.
  • a heating coil in particular for an electric continuous flow heater in bare wire technology, has two Schuhausschenkel which are electrically connected to each other via a line bridge.
  • the conductor bridge is at least one deformed helical turn.
  • This heating coil is characterized by a high degree of robustness, since the line bridge is formed integrally with the Schuchtlschenkeln, so that no valid as potential weak points welding. Soldering, gluing or other connection points between the conductor bridge and the Schuchtlschenkeln are necessary.
  • the receiving device has for elastic stretching of the heating coil in the longitudinal direction of two receiving elements which are movable relative to each other.
  • the device For ejecting the deformed heating coil from the wedge element, the device has an ejection element which has a recess for receiving the wedge element and is relatively movable relative thereto. This will between the heating coil and the ejection element created a large contact surface, so that damage to the heating coil, in particular the deformed helical path when stripping or pushing off the heating coil is prevented by the wedge element.
  • the bending elements are pivotable relative to each other. It is advantageous to avoid damage to the spiral path to be deformed when the bending elements each have a wedge-like projection, with which they can be brought into contact with the helical gear and to which they are pivotable.
  • the present invention is particularly suitable for the production of heating coils with an integral conductor bridge between two Schuetzlschenkeln for use in small flow heaters in bare wire technology.
  • Fig. 1 has a heating coil 1, in particular for a compact water heater in bare wire technology, two Schumannlschenkel 2, 4, which are electrically connected to each other via an integral conductor bridge 6.
  • the Schuchtlschenkel 2, 4 go with one end in the line bridge 6 and consist of a plurality of helical turns 8.
  • the conductor bridge 6 is formed by a deformed helical turn or helical turn section 8, which after the in the Fig. 3 to 10 formed inventive method is formed.
  • a contact pin 10, 12 attached to power the heating coil 1 is at the free end portions of the Bankschschenkel 2, 4, respectively.
  • a device 14 As shown in Fig. 2 a device 14 according to the invention has two receiving elements 16, 18 of a receiving device not shown in detail, a wedge element 20, two bending elements 22, 24 of a bending device not shown in detail and an ejection element 26 of an unspecified ejector.
  • the receiving elements 16, 18 each have a in Fig. 7 They are at least in the direction of the transverse axis y of the device 14 relative to each other movable so that the heating coil 1 can be stretched along its longitudinal axis and their windings can be opened.
  • the wedge element 20 has a rectangular base body 32, on the one narrow side 34 of which a wedge 36 extending in the direction of the longitudinal axis x of the device 14 is arranged centrally.
  • the wedge 36 has two opposite wedge surfaces 38, 40, which are employed at an equal angle to the vertical axis z of the device 14.
  • the bending elements 22, 24 each have a base body 42, 44, on which a wedge projection 46, 48 is formed.
  • the wedge projections 46, 48 are each formed as an extension of opposite side surface 50, 52 of the base body 42, 44 and spaced by a gap 54 from each other. They each have a side facing away from the gap 54 inclined surface 56, 58, which are employed at an equal angle to the vertical axis z of the device 14.
  • the ejection element 26 has a recess 60 corresponding to the outer contour of the wedge element 20 for receiving the wedge element 20 and is displaceably guided in the direction of the longitudinal axis x of the device 14 on the latter.
  • the heating coil 1 is clamped with its contact pins 10, 12 in the receptacles 28, 30 of the receiving elements 16, 18 and in the longitudinal direction over a divergence of the receiving elements 16, 18 along the transverse axis y of the device 14 is stretched.
  • the bending elements 22, 24 are located in a position above the wedge 36 of the wedge element 20, wherein their spacing from one another via the gap 54 approximately corresponds to a root width of the wedge 36 in the region of the narrow side 34, so that the bending elements 22, 24 laterally of the wedge surfaces 38th , 40 can be positioned.
  • the receiving elements 14, 16 are moved such that as in Fig. 4 shown the heating coil 1 with her to be deformed helical turn 8 (see. Fig. 5 ) is positioned between the wedge 36 of the wedge member 20 and the flexures 22,24.
  • the receiving elements 16, 18 as far along the vertical direction z of the device 14 lowered until the wedge 36 is immersed in the heating coil 1 and this is stored with a portion of the helical turn 8 on the wedge 36.
  • the receiving elements 16, 18 are further lowered until the Schuchtlschenkel 2, 4 are made slightly to the longitudinal axis of the heating coil 1.
  • each device or element of the device 14 may be designed to be relatively movable relative to the other devices or elements.
  • a method for producing a heating coil with two Schuetzlschenkeln which are electrically connected to each other via a line bridge, wherein at least one of the conductor bridge forming Wendelgang the heating coil is defined, the heating coil is positioned on the helical gear on a wedge element, side of the spiral path two bending elements in immersing the heating coil, at least one of the bending elements is moved such that the spiral path is deformed at least in sections and the heating coil is removed from the wedge element, a heating coil with an integral conductor bridge and an apparatus for performing such a method.
  • the inventive method is particularly suitable for the production of heating coils with an integral conductor bridge between two Schuetzlschenkeln for use in small flow heaters in bare wire technology. These water heaters provide hot water to a user in homes (in kitchens or bathrooms) and / or in commercial premises such as washrooms.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)
  • General Induction Heating (AREA)
EP11722803.1A 2010-06-15 2011-05-31 Verfahren und vorrichtung zur herstellung einer heizwendel, sowie heizwendel Not-in-force EP2583533B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11722803T PL2583533T3 (pl) 2010-06-15 2011-05-31 Sposób i urządzenie do wytwarzania skrętki grzejnej, a także skrętka grzejna

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010030100A DE102010030100A1 (de) 2010-06-15 2010-06-15 Verfahren und Vorrichtung zur Herstellung einer Heizwendel, sowie Heizwendel
PCT/EP2011/058891 WO2011157543A1 (de) 2010-06-15 2011-05-31 Verfahren und vorrichtung zur herstellung einer heizwendel, sowie heizwendel

Publications (2)

Publication Number Publication Date
EP2583533A1 EP2583533A1 (de) 2013-04-24
EP2583533B1 true EP2583533B1 (de) 2015-10-07

Family

ID=44119357

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11722803.1A Not-in-force EP2583533B1 (de) 2010-06-15 2011-05-31 Verfahren und vorrichtung zur herstellung einer heizwendel, sowie heizwendel

Country Status (4)

Country Link
EP (1) EP2583533B1 (pl)
DE (1) DE102010030100A1 (pl)
PL (1) PL2583533T3 (pl)
WO (1) WO2011157543A1 (pl)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2449653A (en) * 1946-07-27 1948-09-21 Dorothy J Isaac Filament forming apparatus
GB639583A (en) * 1947-07-25 1950-06-28 Gen Electric Improvements in and relating to filament forming apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19610593A1 (de) * 1996-03-18 1997-09-25 Wastec Ag Wärmetauscher-Anordnung
DE19651079A1 (de) * 1996-12-09 1998-06-10 Bosch Siemens Hausgeraete Heizblock mit Heizwendeln
DE19651087C2 (de) 1996-12-09 2002-06-20 Bsh Bosch Siemens Hausgeraete Heizblock mit Gehäuseschalen
FR2908953B1 (fr) * 2006-11-17 2009-01-23 Atlantic Ind Soc Par Actions S "procede de fabrication d'elements chauffants,elements isolants et resistances correspondants"
ATE492140T1 (de) * 2008-06-09 2011-01-15 Leister Process Tech Elektrisches widerstandsheizelement für eine heizeinrichtung zum erhitzen eines strömenden gasförmigen mediums

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2449653A (en) * 1946-07-27 1948-09-21 Dorothy J Isaac Filament forming apparatus
GB639583A (en) * 1947-07-25 1950-06-28 Gen Electric Improvements in and relating to filament forming apparatus

Also Published As

Publication number Publication date
WO2011157543A1 (de) 2011-12-22
DE102010030100A1 (de) 2011-12-15
PL2583533T3 (pl) 2016-03-31
EP2583533A1 (de) 2013-04-24

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