EP2506661B1 - Elektrische Heizeinrichtung - Google Patents

Elektrische Heizeinrichtung Download PDF

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Publication number
EP2506661B1
EP2506661B1 EP12162340.9A EP12162340A EP2506661B1 EP 2506661 B1 EP2506661 B1 EP 2506661B1 EP 12162340 A EP12162340 A EP 12162340A EP 2506661 B1 EP2506661 B1 EP 2506661B1
Authority
EP
European Patent Office
Prior art keywords
heating device
weight
housing
heating element
side walls
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.)
Active
Application number
EP12162340.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2506661A1 (de
Inventor
Roland Starck
Oleg Kexel
Armin Lang
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.)
Eichenauer Heizelemente GmbH and Co KG
Original Assignee
Eichenauer Heizelemente GmbH and Co KG
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 Eichenauer Heizelemente GmbH and Co KG filed Critical Eichenauer Heizelemente GmbH and Co KG
Priority to PL12162340T priority Critical patent/PL2506661T3/pl
Publication of EP2506661A1 publication Critical patent/EP2506661A1/de
Application granted granted Critical
Publication of EP2506661B1 publication Critical patent/EP2506661B1/de
Active 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
    • H05B3/78—Heating arrangements specially adapted for immersion heating
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/021—Heaters specially adapted for heating liquids

Definitions

  • the invention relates to a heating device with the features specified in the preamble of claim 1.
  • a heating device is from the DE 10 2009 012 982 A1 known.
  • Ceramic heating elements can be effectively protected in metal housings from a fluid to be heated. Important for heaters is a good thermal coupling of the heating element to the surrounding metal housing. Usually, therefore, housing are pressed after the introduction of ceramic heating elements, so that heat generated by heating elements can be delivered well to the metal housing.
  • the metal housing can be additionally provided with a plastic sheath.
  • a tank heater with a plastic coated metal housing which is manufactured as an extruded profile.
  • plastic-coated metal housings also as cast housings.
  • the object of the present invention is to show a way how inexpensive a heating device can be created, in which heat generated by a ceramic heating element can be delivered well to a metal housing.
  • a heating device In a heating device according to the invention two opposite side walls are plastically deformed by pressing the cast housing, wherein the plastic deformation of the two opposite side walls increases in the longitudinal direction of the side walls.
  • the interior, in which at least one, preferably ceramic, heating element is arranged, thus has a wedge-shaped tapered shape prior to compression. During compression, the thinner end of the wedge-shaped interior is less deformed than the thicker end. By pressing so the wedge shape is counteracted, so that in the ideal case results in a housing with parallel upper and lower sides.
  • the side walls, which connect the top and bottom of the housing, are therefore deformed more at the thicker end of the housing than at the thinner end.
  • the casting housing is first prepared so that the interior of the housing tapers in a wedge shape, a heating element or more heating elements can more easily bring into the interior of the housing.
  • the cast housing can then better demold.
  • the wedge-shaped prior to compression molding housing may be closed at its thinner end by a side wall. It is also possible that it has a continuous channel.
  • Heating element and contact plate can be connected by a plastic mounting element to a preassembled unit that can be handled well.
  • the mounting element may be, for example, an adhesive layer, which is the contact plate stops at the heating element.
  • the mounting element may for example also be a foil, are wrapped with the heating element and contact plate, or be a mounting frame.
  • the lower wall of the housing has an inwardly raised area, connect to the two lowered areas extending in the interior along the two side walls along.
  • the heat coupling of the ceramic heating element to the housing can be improved or the required for a good heat coupling plastic deformation of the side walls of the housing advantageously reduce.
  • the lowered areas of the lower wall make it possible in particular to create space for the lateral limbs of a mounting frame which holds the ceramic heating element.
  • a further advantageous development of the invention provides that the mounting element, for example a mounting frame, holds two contact plates between which the heating element is seated.
  • the ceramic heating element between the two contact plates can be included, so that an easily manageable, preassembled unit is formed.
  • the contact sheets and one or more intermediate heating elements may be wrapped for example with a mounting element in the form of plastic film. It when one of the two contact plates rests against the inwardly raised portion of the lower wall is particularly advantageous.
  • the housing is made of an aluminum-based alloy, in particular an aluminum-silicon alloy.
  • Aluminum alloys have an advantageously high thermal conductivity.
  • Aluminum-silicon alloys combine a good thermal conductivity with advantageous mechanical properties, which are favorable for a compression of the housing.
  • aluminum-silicon alloys can be cast well and can withstand high mechanical stress, so that a high contact pressure, with which the at least one ceramic heating element is pressed in the housing, can be maintained for a long time.
  • the silicon content of the aluminum-based alloy is 5 wt% to 12 wt%, preferably 7 wt% to 11 wt%. It is furthermore preferred that the remaining constituents of the aluminum-silicon alloy constitute less than 5% by weight, particularly preferably less than 3% by weight, in particular less than 2% by weight.
  • the aluminum-silicon alloy from which the housing is cast preferably contains from 0.1 to 1% by weight of iron, more preferably from 0.1 to 0.8% by weight of iron.
  • Strontium is preferably contained in the aluminum-silicon alloy with a weight fraction of 0.5 wt .-% to 1.5 wt .-%. It is particularly preferred that the strontium content is greater than the iron content. Such an alloy can be pressed well and has an advantageous heat conduction.
  • a further advantageous embodiment of the invention provides that the housing is surrounded by a plastic jacket.
  • a cast housing advantageously has rounder edges than an extruded profile. A plastic sheath can therefore better apply to a cast housing and adheres better than on an extruded profile.
  • the housing is a tubular housing.
  • a tubular housing advantageously, a larger number of ceramic heating elements can be arranged one behind the other.
  • the housing has a width which increases in the longitudinal direction of the plastically deformed side walls.
  • the deformation of the side walls increases along with the width in the longitudinal direction of the housing.
  • the housing may have its maximum width at that end at which the plastic deformation of the side walls is maximum.
  • the in the FIGS. 1 to 4 shown heating device has a cast housing 1, which surrounds an interior, in which at least one ceramic heating element 2, for example, a PTC heating element, is arranged.
  • the cast housing 1 may have heat dissipation elements such as cooling fins or the like.
  • the interior of an upper wall 1 a and a lower wall 1b is limited.
  • the upper wall 1 a and the lower wall 1 b are connected to each other via two opposite side walls 1 c.
  • the cast housing 1 can be designed as a tubular housing which is open at two opposite ends. But it is also possible that the housing 1 is closed at one end by another side wall.
  • the housing 1 has a wedge-shaped interior before pressing.
  • the distance between the upper wall 1 a and the lower wall 1b increases continuously before pressing from one end to the other end of the housing 1.
  • the housing 1 is pressed.
  • the two opposite side walls 1c are plastically deformed.
  • the upper wall 1 a is preferably parallel to the lower wall 1 b. This means that the plastic deformation of the two opposite side walls 1c in the longitudinal direction of the side walls 1 c increases.
  • the housing 1 has a width which increases in the longitudinal direction of the plastically deformed side walls 1c.
  • the interior of the housing 1 a width which increases in the longitudinal direction of the side walls 1c.
  • the width of the inner space of the housing 1 increases in the same direction as the plastic deformation of the side walls 1c.
  • the interior has its largest width that is, at the end at which the plastic deformation of the side walls 1c is maximum.
  • the side walls 1c of the housing 1 are each inclined to the upper wall 1a.
  • the upper wall 1 a of the housing 1 thus has a larger area than the lower wall 1 b of the housing first
  • the ceramic heating element 2 is held by a mounting frame 3 made of plastic, which preferably also holds two contact plates 4.
  • One of the two contact sheets 4 carries an insulating layer, for example made of plastic or a ceramic material, preferably alumina.
  • the other contact plate 4 may also be covered with an insulating layer or - as in the illustrated embodiment - the cast housing 1 contact to form a ground contact.
  • the heating element 2 is in the illustrated embodiment between the two contact plates. It is thus contacted at its two opposite contact sides of the contact plates 4.
  • One of the two contact surfaces of the heating element 2 is the upper wall 1a and the other contact surface of the lower wall 1 b facing.
  • FIG. 4 shows, in the illustrated embodiment, one of the two contact plates 4 at an inwardly raised portion of the lower wall 1 c of the housing 1 at.
  • a pedestal on which the contact plate 4 is located In the interior of the housing 1 is therefore a pedestal on which the contact plate 4 is located.
  • the raised area is bounded on two opposite sides by a step. Between the two plastically deformed side walls 1 c and the inwardly raised region is thus located in the interior, in each case a lowered area, in each of which a leg of the mounting frame 3 is located.
  • An inwardly raised area can also be formed on the upper wall 1a of the housing 1 and abut directly on the ceramic heating element 2, if only a single contact plate is used.
  • the cast housing 1 is cast from a metal alloy, such as an aluminum-based alloy.
  • the aluminum-based alloy is an aluminum-silicon alloy.
  • the weight content of the aluminum-silicon alloy is preferably 5 wt .-% to 12 wt.%, In particular 7 wt .-% to 11 wt .-%.
  • the aluminum-based alloy may additionally contain other alloying ingredients.
  • the sum of the remaining constituents of the aluminum-silicon alloy is less than 5 wt .-%, more preferably less than 3 wt .-%, in particular less than 2 wt .-%.
  • the aluminum-based alloy preferably contains from 0.1% by weight to 1% by weight of iron, particularly preferably from 0.4% by weight to 0.8% by weight of iron.
  • the aluminum-based alloy strontium is preferably admixed, for example 0.5% by weight to 1.5% by weight strontium.
  • the cast housing 1 can be encased after insertion of the mounting frame 3 and the pressing with plastic.
  • the plastic jacket not shown in the figures, can be applied, for example, by injection molding or as a powder coating.
  • heating element 2 is arranged in the interior of the heater. In the interior of the heater but can also be arranged a plurality of ceramic heating elements.

Landscapes

  • Resistance Heating (AREA)
  • Air-Conditioning For Vehicles (AREA)
EP12162340.9A 2011-04-02 2012-03-30 Elektrische Heizeinrichtung Active EP2506661B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12162340T PL2506661T3 (pl) 2011-04-02 2012-03-30 Elektryczne urządzenie grzewcze

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102011015944 2011-04-02
DE102011053889 2011-09-23
DE102011054052 2011-09-29

Publications (2)

Publication Number Publication Date
EP2506661A1 EP2506661A1 (de) 2012-10-03
EP2506661B1 true EP2506661B1 (de) 2013-07-24

Family

ID=46000754

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12162340.9A Active EP2506661B1 (de) 2011-04-02 2012-03-30 Elektrische Heizeinrichtung

Country Status (3)

Country Link
EP (1) EP2506661B1 (pl)
DE (1) DE102012102845A1 (pl)
PL (1) PL2506661T3 (pl)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013100973B4 (de) 2012-10-02 2022-08-11 Eichenauer Heizelemente Gmbh & Co. Kg Elektrische Heizeinrichtung
DE102017209568A1 (de) 2017-06-07 2018-12-13 Robert Bosch Gmbh Heizvorrichtung
DE102017123546A1 (de) * 2017-10-10 2019-04-11 Eichenauer Heizelemente Gmbh & Co. Kg Verfahren zum Herstellen einer Tankheizung sowie Tankheizung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2816076A1 (de) * 1978-04-13 1979-10-25 Siemens Ag Heizer mit ferroelektrischem keramik-heizelement
EP0573691B1 (de) * 1992-06-11 1997-01-08 David & Baader DBK Spezialfabrik elektrischer Apparate und Heizwiderstände GmbH Verfahren zur Herstellung eines PTC-Heizkörpers
DE102005036430B4 (de) 2005-08-03 2011-05-05 Eichenauer Heizelemente Gmbh & Co. Kg Tankheizung
DE202005020765U1 (de) * 2005-08-10 2006-07-06 Stego-Holding Gmbh Vorrichtung zum Übertragen von Wärme von einem Heizelement auf Umgebungsluft
EP1921896B1 (de) * 2006-10-25 2014-12-10 Eberspächer catem GmbH & Co. KG Wärmeerzeugendes Element für eine elektrische Heizvorrichtung und Verfahren zur Herstellung derselben
DE102009012982A1 (de) 2009-03-12 2010-09-16 Eichenauer Heizelemente Gmbh & Co. Kg Heizvorrichtung

Also Published As

Publication number Publication date
DE102012102845A1 (de) 2012-10-04
PL2506661T3 (pl) 2014-01-31
EP2506661A1 (de) 2012-10-03

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