EP3064856B1 - Heizeinrichtung - Google Patents

Heizeinrichtung Download PDF

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Publication number
EP3064856B1
EP3064856B1 EP15157167.6A EP15157167A EP3064856B1 EP 3064856 B1 EP3064856 B1 EP 3064856B1 EP 15157167 A EP15157167 A EP 15157167A EP 3064856 B1 EP3064856 B1 EP 3064856B1
Authority
EP
European Patent Office
Prior art keywords
heating
heating device
heating elements
frame part
seals
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
EP15157167.6A
Other languages
English (en)
French (fr)
Other versions
EP3064856A1 (de
Inventor
Eric Marlier
Laurent Muller
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.)
Mahle International GmbH
Original Assignee
Mahle International 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 Mahle International GmbH filed Critical Mahle International GmbH
Priority to EP15157167.6A priority Critical patent/EP3064856B1/de
Publication of EP3064856A1 publication Critical patent/EP3064856A1/de
Application granted granted Critical
Publication of EP3064856B1 publication Critical patent/EP3064856B1/de
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Classifications

    • 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
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • F24H3/0452—Frame constructions
    • F24H3/0464—Two-piece frames, e.g. two-shell frames, also including frames as a central body with two covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/02—Casings; Cover lids; Ornamental panels

Definitions

  • the present invention relates to a heating device, in particular for a vehicle air conditioning system.
  • Known heating devices with a housing having a first frame part and a second frame part, in which at least two, preferably even a plurality of, elongated heating elements are arranged are to be found in almost every modern air conditioning system and are therefore generally known.
  • each heating element is held in a shared upper seal by a respective upper longitudinal end, whereas it is held by a respective lower longitudinal end in an associated lower seal.
  • Both the upper and the lower seal are arranged or respectively clamped here at two opposite sides between the two frame parts, wherein to assist the installation and also the gas tightness between the seals and the frame parts, a lubricating/sealing material is arranged.
  • the upper seal has a number of through-openings, corresponding to the number of heating elements, through which respectively an electrical connection of an associated heating element is directed and in which the heating elements are respectively received in a sealed manner.
  • the first and the second frame part have here a permeable, in particular gas-permeable grid structure between the two seals, and delimit in this region a heating chamber.
  • This heating chamber is sealed in a fluid-tight and gas-tight manner via the upper seal with respect to a connection chamber, in which the electrical connections of the heating elements are arranged.
  • a generic heating device is known from EP 2 395 295 A1 .
  • Another heating device is known from EP 2 293 648 a1.
  • a disadvantage in the heating devices known from the prior art is the comparatively laborious installation thereof and the sealing of the connection chamber, because in particular the upper seal is highly fissured and therefore requires a laborious application of lubricating/sealing material.
  • the lubricating/sealing material is, however, also absolutely necessary for facilitating the installation, because a comparatively great frictional resistance exists between the frame parts and the seals, so that an installation without using such a lubricating/sealing material would not be possible.
  • the lubricating/sealing material therefore fulfils two functions.
  • the present invention is concerned with the problem of indicating for a heating device of the generic type an improved or at least an alternative embodiment, which in particular increases the tightness and facilitates the installation.
  • the present invention is based on the general idea of constructing so as to be distinctly less fissured a seal for sealing a heating chamber with respect to an electrical connection chamber and for holding individual electric heating elements, whereby the tightness is increased and the application of a lubricating/sealing material is facilitated.
  • the heating device according to the invention which can be used in particular for a vehicle air conditioning system of a motor vehicle, has here in a known manner a first frame part and a second frame part, which together form a housing, wherein in this housing at least two elongated electric heating elements are arranged.
  • the at least two heating elements are held here respectively by an upper longitudinal end in an upper seal and by a lower longitudinal end in an opposite lower seal.
  • the two seals are arranged or respectively clamped at two opposite sides between the two frame parts.
  • the lubricating/sealing material for example grease
  • the upper seal has a number of through-openings corresponding to the number of heating elements, through which respectively electrical connections of a respectively heating element are directed and in which the heating elements are respectively received in a sealed manner.
  • the lower seal seals the heating chamber in a liquid-tight and gas-tight manner to bottom.
  • both the first and the second frame part have a permeable grid structure and thereby delimit an in particular gas-permeable heating chamber between the two seals.
  • This heating chamber is sealed by the upper seal in a fluid-tight and gas-tight manner against the previously mentioned connection chamber, wherein in this connection chamber the electrical connections of the heating elements are arranged.
  • the upper seal now lies in the region of the through-openings with a continuous, rectangular surface tightly against the first frame part and with a likewise continuous, rectangular surface tightly against the second frame part.
  • the lower seal has at least two receiving openings to receive the respective lower longitudinal ends of the at least two heating elements, wherein the lower seal in the region of the receiving openings lies with two rectangular surfaces tightly against the first frame part and with two opposite rectangular surfaces lies tightly against the second frame part.
  • a hitherto highly fissured surface can now be smoothed, whereby on the one hand the sealing effect can be improved and on the other hand the lubricating effort can be reduced.
  • the heating elements are constructed as PTC heating elements.
  • PTC heating elements are so-called posistors, which can conduct the current better at low temperatures than at high temperatures. Their electrical resistance therefore increases with increasing temperature.
  • PTC heating elements Positive Temperature Coefficient
  • the two frame parts are made from plastic, in particular from PA6.6.
  • Polyamide 6.6 is a partially crystalline polyamide with, however, better mechanical characteristics than PA6.
  • PA6.6 is distinguished in particular also by a heat distortion resistance and a low water absorption, whereby it is predestined for use in the region of a heating device of a vehicle air conditioning system.
  • the two frame parts are constructed as plastic injection moulded parts.
  • the production of such plastic injection moulded parts makes it possible to produce these not only at the highest quality, but in addition also economically and, at the same time, with low unit costs.
  • the two seals are made from silicone rubber.
  • Silicone rubbers are materials able to be transferred into the rubber elastic state, which contain poly(organo)siloxanes which have accessible groups for crosslinking reactions.
  • such silicone rubbers can also contain strengthening substances or respectively fillers, the type and quantity of which distinctly influence the mechanical and chemical behaviour of the silicone elastomers resulting through the crosslinking.
  • the production of the seals from such a silicone rubber is possible in a comparatively cost-effective manner.
  • a heating device 1 which can be used for example in a vehicle air conditioning system 18 of a motor vehicle, has a first frame part 2 (cf. also Fig. 3 ) which, with a second frame part 3 not shown in Fig. 1 (cf. Fig. 4 ), forms a housing 4.
  • this housing 4 at least two elongated heating elements 5, here even eight heating elements 5, are arranged, which can be embodied in particular as PTC heating elements.
  • the heating elements 5 are held here by an upper longitudinal end in an upper seal 6 (cf. also Fig. 2 ) and by a lower longitudinal end in a lower seal 7 (cf. Fig. 5 ).
  • the two seals 6 and 7 are arranged here at two opposite sides between the two frame parts 2, 3, wherein to facilitate the assembly of the heating device 1 and to increase the sealing effect between the seals 6, 7 and the two frame parts 2, 3 a lubricating/sealing material 8 is arranged.
  • the upper seal 6 has a number of through-openings 9 corresponding to the number of heating elements 5, through which respectively an electrical connection 10 of a respective heating element 5 is directed and in which the heating elements 5 are respectively received in a sealed manner.
  • the first and the second frame part 2, 3 have a permeable grid structure here between the two seals 6, 7, as can also be clearly seen in particular in Figs. 3 and 4 , and delimit a permeable heating chamber 11. Between the individual heating elements 5, of course ribs or other heat transmission elements can be arranged here for enlarging the surface and hence for improved heat transfer.
  • the upper seal 6 seals the heating chamber 11 here in a fluid-tight/gas-tight manner against the connection chamber 12 (cf. Fig. 1 ) in which the electrical connections 10 of the heating elements 5 are arranged. Via the connection chamber 12 a connection takes place to a control device, for example. By connecting the control device not only the electric connection is made, but at the same time also the through holes 9 are sealed in the upper seal 6. According to the invention, the upper seal 6 now lies in the region of the through-openings 9 with a continuous, rectangular surface 13 tightly against the first frame part 2 and with an opposite continuous, rectangular surface 13 tightly against the second frame part 3.
  • the latter has at least two receiving openings 14 to receive the respective lower longitudinal ends of the at least two heating elements 5 (cf. Fig. 5 ), wherein here of course the number of receiving openings 14 corresponds to the number of heating elements 5.
  • the lower seal 7 lies here in the region of the receiving openings 14 with two rectangular surfaces 15 tightly against the first frame part 2 and with two opposite rectangular surfaces 15 tightly against the second frame part 3.
  • the lower seal 7 is also distinctly less highly fissured in the region of the surfaces 15 than seals used hitherto in this region, whereby also in this region the lubricating effort can be considerably reduced and hence the installation can be distinctly simplified, and in addition the risk of a gas leakage can be minimized.
  • Figs. 1 and 2 Observing again the upper seal 6 of Figs. 1 and 2 , it can be seen that two projecting sealing pins 16 are arranged thereon, which in an installed heating device 1 are clamped between the two frame parts 2, 3 and are arranged parallel to the elongated heating elements 5.
  • the sealing pins 16 have respectively a cross-like cross-section.
  • the two frame parts 2, 3 are preferably constructed as a plastic injection moulded part and, for example, from a polyamide 6.6.
  • the two seals 6, 7, on the other hand, are preferably constructed from silicone rubber.
  • the second frame part 3 in the region of the upper seal 6 and the lower seal 7 has respectively at least two sleeve-shaped spacer elements 17, which project transversely to the plane of the second frame part 3 and are connected with one another via the two frame parts 2, 3.

Claims (10)

  1. Heizeinrichtung (1), insbesondere für ein Fahrzeugklimaanlagensystem (18),
    - mit einem Gehäuse (4), in welchem zumindest zwei längliche elektrische Heizelemente (5) angeordnet sind,
    - wobei die zumindest zwei Heizelemente (5) mittels eines oberen Längsendes in einer oberen Dichtung (6) und mittels eines unteren Längsendes in einer unteren Dichtung (7) gehalten werden,
    - wobei die obere Dichtung (6) eine Anzahl von Durchgangsöffnungen (9) aufweist, welche der Anzahl von Heizelementen (5) entspricht, durch welche jeweils eine elektrische Verbindung (10) eines jeweiligen Heizelements (5) gerichtet ist und in welche die Heizelemente (5) jeweils in einer abgedichteten Weise aufgenommen werden,
    dadurch gekennzeichnet, dass
    - das Gehäuse (4) einen ersten Rahmenteil (2) und einen zweiten Rahmenteil (3) aufweist,
    - wobei zwei Dichtungen (6, 7) an zwei gegenüberliegenden Seiten zwischen den zwei Rahmenteilen (2, 3) angeordnet sind,
    - wobei zwischen den Dichtungen (6, 7) und den Rahmenteilen (2, 3) ein schmierendes und/oder abdichtendes Material (8) angeordnet ist,
    - der erste und der zweite Rahmenteil (2, 3) eine durchlässige Gitterstruktur zwischen den zwei Dichtungen (6, 7) aufweisen und eine durchlässige Wärmekammer (11) abtrennen,
    - die obere Dichtung (6) die Wärmekammer (11) in einer fluiddichten und gasdichten Weise gegen eine Verbindungskammer (12) abdichtet, in welcher die elektrischen Verbindungen (10) der Heizelemente (5) angeordnet sind,
    - die obere Dichtung (6) in der Region der Durchgangsöffnungen (9) mit einer kontinuierlichen, rechteckigen Fläche (13) dicht gegen den ersten Rahmenteil (2) und mit einer weiteren kontinuierlichen, rechteckigen Fläche (13) dicht gegen den zweiten Rahmenteil (3) liegt,
    - auf der oberen Dichtung (6) zwei abstehende Dichtungspins (16) angeordnet sind, welche in einer installierten Heizeinrichtung (1) zwischen den zwei Rahmenteilen (2, 3) eingeklemmt und parallel zu den länglichen Heizelementen (5) angeordnet sind.
  2. Heizeinrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die untere Dichtung (7) eine Anzahl von Aufnahmeöffnungen (14) zur Aufnahme der jeweiligen unteren Längsenden der Heizelemente (5) entsprechend der Anzahl der Anzahl von Heizelementen (5) aufweist.
  3. Heizeinrichtung nach Anspruch 2,
    dadurch gekennzeichnet, dass
    die untere Dichtung (7) in der Region der Aufnahmeöffnungen (14) mit zwei rechteckigen Flächen (15) dicht gegen den ersten Rahmenteil (2) und mit den zwei rechteckigen Flächen (15) dicht gegen den zweiten Rahmenteil (3) liegt.
  4. Heizeinrichtung nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet, dass
    die Heizelemente (5) als PTC-Heizelemente konstruiert sind.
  5. Heizeinrichtung nach einem der Ansprüche 1 bis 4,
    dadurch gekennzeichnet, dass
    die Dichtungspins (16) jeweils einen kreuzförmigen Querschnitt aufweisen.
  6. Heizeinrichtung nach einem der Ansprüche 1 bis 5,
    dadurch gekennzeichnet, dass
    die zwei Rahmenteile (2, 3) aus Kunststoff, insbesondere aus Polyamid 6.6 konstruiert sind.
  7. Heizeinrichtung nach einem der Ansprüche 1 bis 6,
    dadurch gekennzeichnet, dass
    die zwei Rahmenteile (2, 3) als Kunststoff-Spritzgussformteile konstruiert sind.
  8. Heizeinrichtung nach einem der Ansprüche 1 bis 7,
    dadurch gekennzeichnet, dass
    die zwei Dichtungen (6, 7) aus Silikonkautschuk konstruiert sind.
  9. Heizeinrichtung nach einem der Ansprüche 1 bis 8,
    dadurch gekennzeichnet, dass
    der zweite Rahmenteil (3) in der Region der oberen Dichtung (6) und der unteren Dichtung (7) jeweils zumindest zwei hülsenförmige Abstandselemente (17) aufweist, welche quer zu der Ebene des zweiten Rahmenteils (3) vorstehen, und über welche die zwei Rahmenteile (2, 3) verbunden werden.
  10. Klimaanlagensystem (18) eines Motorfahrzeugs mit einer Heizeinrichtung (1) nach einem der Ansprüche 1 bis 9.
EP15157167.6A 2015-03-02 2015-03-02 Heizeinrichtung Active EP3064856B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15157167.6A EP3064856B1 (de) 2015-03-02 2015-03-02 Heizeinrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15157167.6A EP3064856B1 (de) 2015-03-02 2015-03-02 Heizeinrichtung

Publications (2)

Publication Number Publication Date
EP3064856A1 EP3064856A1 (de) 2016-09-07
EP3064856B1 true EP3064856B1 (de) 2018-09-19

Family

ID=52627038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15157167.6A Active EP3064856B1 (de) 2015-03-02 2015-03-02 Heizeinrichtung

Country Status (1)

Country Link
EP (1) EP3064856B1 (de)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2293648B1 (de) * 2009-09-02 2017-07-19 Mahle Behr France Rouffach S.A.S Wärmeübertrager
EP2395295B1 (de) * 2010-06-11 2013-03-06 Behr GmbH & Co. KG Wärmeübertrager

Non-Patent Citations (1)

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

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