EP1912028A1 - Moyens de chauffage électrique, notamment pour des automobiles - Google Patents

Moyens de chauffage électrique, notamment pour des automobiles Download PDF

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Publication number
EP1912028A1
EP1912028A1 EP06291601A EP06291601A EP1912028A1 EP 1912028 A1 EP1912028 A1 EP 1912028A1 EP 06291601 A EP06291601 A EP 06291601A EP 06291601 A EP06291601 A EP 06291601A EP 1912028 A1 EP1912028 A1 EP 1912028A1
Authority
EP
European Patent Office
Prior art keywords
heating arrangement
arrangement according
elements
ptc
tie rod
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
EP06291601A
Other languages
German (de)
English (en)
Other versions
EP1912028B1 (fr
Inventor
Michel Brun
Geoffrey Denny
Gérard Eckerlen
Erwan Gogmos
Pascal Miss
Mathieu Mougey
Nicolas Robin
Christophe Schmittheisler
Stéphane Weingaertner
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 Behr France Rouffach SAS
Original Assignee
Behr France Rouffach SAS
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 Behr France Rouffach SAS filed Critical Behr France Rouffach SAS
Priority to EP06291601.0A priority Critical patent/EP1912028B1/fr
Publication of EP1912028A1 publication Critical patent/EP1912028A1/fr
Application granted granted Critical
Publication of EP1912028B1 publication Critical patent/EP1912028B1/fr
Ceased 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
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • H05B3/50—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins
    • 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
    • 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
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1863—Arrangement or mounting of electric heating means
    • F24H9/1872—PTC
    • 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
    • H05B2203/02—Heaters using heating elements having a positive temperature coefficient

Definitions

  • the invention relates to an electrical heating arrangement with PTC elements, in particular for a motor vehicle.
  • the first embodiment generally comprises strip or cuboid PTC elements which are arranged between contact plates and / or corrugated ribs, via which the electrical contacting takes place.
  • the air to be heated essentially absorbs the heat emitted by the PTC elements from the corrugated fins provided for the enlargement of the heat transfer surface.
  • the PTC elements may be plastic or ceramic elements.
  • FIG EP 1 522 439 A1 An example of such an embodiment is shown in FIG EP 1 522 439 A1 disclosed.
  • the arranged between the contact plates PTC elements and arranged on the outside of the contact plates corrugated fins are held in an electrically insulating plastic frame.
  • the electrical contacting of the contact sheets can be effected in that the contact plates protrude laterally from the frame and a plug connection is provided, wherein the frame can be designed accordingly.
  • the contact sheets can also be connected within the frame with contact rails, which are contacted from the outside, or an electrical conductor is inserted directly into the frame and connected to the contact bars or contact plates.
  • a honeycomb body which consists entirely of a PTC material through which the air to be heated flows.
  • the electrical contacting takes place on two opposite sides of the honeycomb body.
  • An example of such an embodiment is shown in FIG DE 100 60 301 A1 disclosed, wherein the honeycombs are formed as a continuous channels with a square cross-section.
  • an electrical heating arrangement in particular for a motor vehicle, having a heat transfer area for transferring the heat generated to a fluid flowing through the electric heating arrangement, the heat transfer area having a number of flat elements arranged side by side, and the flat elements are non-positively clamped together in at least one connecting region via at least one tie rod.
  • a tie rod for example, formed by a rod with end-threaded areas and nuts screwed thereto, allows a simple way a purely mechanical assembly (and accordingly disassembly) and also a purely mechanical fixation of the heating grid, which preferably is formed from a plurality of individual elements, in particular preferably by plate-shaped PTC elements (ceramic or plastic), optionally also in combination with other elements.
  • a usually advantageous bonding can in principle - but not necessarily - omitted, since by the tie rod or a sufficiently secure fixation is possible.
  • a purely mechanical assembly and fixation without adhesives or similar. also simplifies recycling of the heater assembly, which is associated with a separation of the individual components.
  • the tie rod provides at least a portion of the electrical contact.
  • a PTC element or possibly also an element serving for the distribution of current such as a metal strip or the like
  • An electrical contact via laterally projecting tongues or similar. can be additionally provided, but preferably omitted, if two tie rods are provided.
  • the flat elements are preferably at least partially formed by PTC elements, ie the flat elements are formed by composite, for example by said PTC elements, in particular conventional PTC bricks glued in between the metal strips and / or corrugated ribs that make electrical contact.
  • At least one through opening for the tie rod is provided in the heater grid, i. provided in the heat transfer area.
  • This opening can be located both at the edge, in particular in the case of two or more openings, or in a central area.
  • Particularly preferred two tie rods and thus two through openings are provided in the heater.
  • each PTC element-in the case of plate-shaped PTC elements-or in the heating grid Preferably, exactly two openings are provided in each PTC element-in the case of plate-shaped PTC elements-or in the heating grid, through which an electrically conductive tie rod protrudes.
  • more than two openings per PTC element or heating grid and correspondingly many electrically conductive tie rods can be provided in order to enable different heating stages in which different areas of the PTC elements or the heating grid are traversed by current and thereby generate heat.
  • isolated tie rods are also possible for additional fixation, which serve exclusively for fixing and thus avoiding vibrations.
  • a plurality of PTC elements is provided, wherein the PTC elements are arranged parallel to each other and spaced from each other.
  • Such a configuration in conjunction with tie rods allows a relatively simple extension of the heater assembly in the longitudinal direction of the tie rods, but the frame must be adjusted accordingly.
  • spacer elements are preferably arranged between the individual PTC elements Slices, arranged.
  • the spacer elements have for this purpose an opening through which the corresponding tie rod protrudes. In this case, the outer or inner dimensions of the openings preferably correspond.
  • the spacer elements are preferably electrically conductive, so that a large-area electrical contacting of the intermediate PTC elements is ensured.
  • the electrically conductive tie rods, as well as the electrically conductive spacer elements, particularly preferably in the form of discs, are preferably made of steel, stainless steel, brass, copper, silver-plated copper.
  • an electrically conductive coating which has sufficient conductivity is sufficient, so that a more cost-effective base material, which has sufficient strength and on which the coating can be reliably applied, can be used for the tie rods and / or spacer elements.
  • a PTC element-disc arrangement is provided on the tie rods with a plurality of alternately arranged PTC elements and discs or spacers which correspond in function to those of discs.
  • the PTC element-disc arrangement preferably ends on the outside in each case with a disk or another spacer element.
  • For bracing the PTC elements and thus ensuring the electrical contact is preferably screwed to at least one end of the tie rod, which is threaded, or at least one end of the threaded rod formed as a tie rod at least one nut.
  • one end of the tie rod is head-like in diameter expanded and thus forms an end stop for a PTC element disc arrangement, so that the assembly is facilitated because only at one end of the tie rod fixation after threading of the PTC Elements and discs must be provided.
  • an electrical connection is prepared at one end of the tie rod, so that during assembly a quick and easy electrical contact is possible.
  • the PTC element is preferably a plastic PTC element.
  • PTC elements can be produced inexpensively in almost any shape.
  • the use of ceramic PTC bricks with parallelepiped shapes is also possible, particularly preferably in a composite.
  • the frame is preferably made of polyamide, more preferably PA66, and is injection molded. It can be formed with a corresponding embodiment, but in particular also in several parts, wherein the individual parts can be connected to each other in a known manner, for example by means Verclipsens or screwing. In this case can be done in the frame by connecting the parts at the same time a fixation of the rod-PTC elements-disc arrangement.
  • Heating arrangements according to the invention can be provided both as a heater in conjunction with a conventional air conditioner or a conventional heater and in isolation.
  • a heater assembly 1 serves as a heater in an automotive air conditioner, being arranged in the air flow direction according to a conventional heater.
  • the heating assembly 1 has a frame 2 made of plastic, in this case PA66, which is injection-molded.
  • a plurality of plate-shaped plastic PTC Elementen 3 are arranged parallel to each other and spaced from each other, so that the air flowing through the heater assembly 1 air is distributed to the individual gaps between the PTC elements 3 and the same on both sides of air to be flowed around. Due to the configuration of the PTC elements 3, they are also referred to as "flat elements".
  • the PTC elements 3 have an elongate shape with narrow sides ending in a radius, wherein a circular opening 4, for example a bore, is provided in the center of curvature.
  • a circular opening 4 for example a bore
  • threaded rods 5 whose outer diameter corresponds to the opening diameter.
  • the threaded rods 5 are made according to the embodiment of stainless steel.
  • any other electrically conductive materials which have sufficient stability are also possible, in particular steel, brass, copper, silver-plated copper.
  • an electrically conductive coating which has sufficient conductivity is sufficient.
  • the rods form tie rods, which serve, inter alia, the bracing of the PTC elements 3.
  • electrically conductive disks 6 are arranged on the threaded rods 5, which ensure a constant distance between the PTC elements 3 and have an inner diameter corresponding to the threaded rod outer diameter.
  • the outer diameter of the discs 6 is in the present case dimensioned so that it corresponds to the curvature diameter of the rounded portion of the PTC elements 3, so that viewed from the narrow side a compact, columnar shape and also in the air flow direction, a block-like shape of the PTC element discs
  • the material of the disks 6 can be the same material as the threaded rods 5.
  • a nut 7 is arranged in each case after the final disc, which braces the entire assembly. Any backups of the Nuts 7 are - although not shown in the drawing - possible, for example. Locknuts, spring washers or split pins.
  • the threaded rods 5 protrude laterally beyond the frame 2 on one side 8, where they can be electrically contacted in a simple and in principle known manner, i. the tie rods serve as electrical contacts.
  • the entire assembly of the heater assembly 1 takes place here purely mechanically, which is also very advantageous in terms of a possible recycling and the disassembly associated therewith.
  • the threaded rods 5 need not necessarily be simply formed threaded rods, as shown in FIG. 4. Alternatively, more specifically adapted to the application threaded rods are possible, for example. As shown in Fig. 5, with a Radsok connection, as shown in Fig. 6 and 7, with an attached directly at the end electrical connection in the form of a perforated disc with tab , or as in Fig. 8 with a widened end, so that on one side the mother can be omitted, with combinations are possible, in particular the first and last variant. However, other electrical contacting systems of the threaded rods are possible. Likewise, a threaded thread does not necessarily have to be provided in the case of the threaded rods; instead, a correspondingly designed end region is sufficient for screwing on a nut.
  • the second, other contact takes place here in a known manner via an outer, a tongue-forming end of not contacted via the holes metal strip.
  • an electrical contact via a second rod would be possible, wherein the bore dimensions are to be interpreted in the metal strip such that only one metal strip is in contact with one of the rods.
  • the rod or rods are used in addition to the electrical contact and the bracing of the heating grid, at least in the context of assembly, so that after the gluing, with still uncured adhesive, no displacement of the individual components to each other is possible. Preferably, however, even after curing of the adhesive by the rod (n) applied pressure on the heater is present.
  • the ends of the bars when projecting beyond the frame, can also serve to position and fix the heating grid in the frame.
  • a nut can be screwed on the outside of an end of the rod, of course, a fixation is possible on both sides.
  • discs can also be used in those holes that are not the electrical contact of the corresponding Metal strip serve, ie the insulating discs separate the metal strip from the guided through the bore rod.
  • the discs can be used during the assembly of the heater grid.

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  • 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)
  • Air-Conditioning For Vehicles (AREA)
  • Resistance Heating (AREA)
EP06291601.0A 2006-10-11 2006-10-11 Moyens de chauffage électrique, notamment pour des automobiles Ceased EP1912028B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06291601.0A EP1912028B1 (fr) 2006-10-11 2006-10-11 Moyens de chauffage électrique, notamment pour des automobiles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06291601.0A EP1912028B1 (fr) 2006-10-11 2006-10-11 Moyens de chauffage électrique, notamment pour des automobiles

Publications (2)

Publication Number Publication Date
EP1912028A1 true EP1912028A1 (fr) 2008-04-16
EP1912028B1 EP1912028B1 (fr) 2016-03-30

Family

ID=37757139

Family Applications (1)

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EP06291601.0A Ceased EP1912028B1 (fr) 2006-10-11 2006-10-11 Moyens de chauffage électrique, notamment pour des automobiles

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EP (1) EP1912028B1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2161515A1 (fr) * 2008-09-05 2010-03-10 Behr France Rouffach SAS Caloporteur
WO2018215545A1 (fr) * 2017-05-24 2018-11-29 Webasto SE Appareil de chauffage électrique
GB2613777A (en) * 2021-12-03 2023-06-21 Amphenol Thermometrics Inc Heating unit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3666924A (en) * 1970-11-16 1972-05-30 Westinghouse Electric Corp Electric resistance convection heater
US3851147A (en) * 1973-04-02 1974-11-26 Ind Eng & Equipment Co Blast coil heater
EP0019376A1 (fr) * 1979-04-28 1980-11-26 Murata Manufacturing Co., Ltd. Appareil de chauffage employant un thermistor
EP0462005A1 (fr) * 1990-06-14 1991-12-18 Fujikura Ltd. Bobine, élément de bobinage, bloc de bobine et moteur générateur de chaleur, souffleur d'air chaud et réchauffeur d'eau submersible assemblé avec ceux-là

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3666924A (en) * 1970-11-16 1972-05-30 Westinghouse Electric Corp Electric resistance convection heater
US3851147A (en) * 1973-04-02 1974-11-26 Ind Eng & Equipment Co Blast coil heater
EP0019376A1 (fr) * 1979-04-28 1980-11-26 Murata Manufacturing Co., Ltd. Appareil de chauffage employant un thermistor
EP0462005A1 (fr) * 1990-06-14 1991-12-18 Fujikura Ltd. Bobine, élément de bobinage, bloc de bobine et moteur générateur de chaleur, souffleur d'air chaud et réchauffeur d'eau submersible assemblé avec ceux-là

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2161515A1 (fr) * 2008-09-05 2010-03-10 Behr France Rouffach SAS Caloporteur
WO2018215545A1 (fr) * 2017-05-24 2018-11-29 Webasto SE Appareil de chauffage électrique
WO2018215537A1 (fr) 2017-05-24 2018-11-29 Webasto SE Appareil de chauffage électrique, procédé de fabrication et de commande et utilisation d'une tel appareil de chauffage
GB2613777A (en) * 2021-12-03 2023-06-21 Amphenol Thermometrics Inc Heating unit

Also Published As

Publication number Publication date
EP1912028B1 (fr) 2016-03-30

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