EP2296432B1 - Caloporteur - Google Patents

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Publication number
EP2296432B1
EP2296432B1 EP09290702.1A EP09290702A EP2296432B1 EP 2296432 B1 EP2296432 B1 EP 2296432B1 EP 09290702 A EP09290702 A EP 09290702A EP 2296432 B1 EP2296432 B1 EP 2296432B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
electrically insulating
insulating plastic
rib
plastic frame
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
EP09290702.1A
Other languages
German (de)
English (en)
Other versions
EP2296432A1 (fr
Inventor
Thomas Blum
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
Mahle 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 Mahle Behr France Rouffach SAS filed Critical Mahle Behr France Rouffach SAS
Priority to EP09290702.1A priority Critical patent/EP2296432B1/fr
Publication of EP2296432A1 publication Critical patent/EP2296432A1/fr
Application granted granted Critical
Publication of EP2296432B1 publication Critical patent/EP2296432B1/fr
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
    • 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
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
    • F24H3/08—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes
    • F24H3/081—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes using electric energy supply
    • 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
    • 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 resistor

Definitions

  • the invention relates to a heat exchanger according to the preamble of claim 1.
  • a PTC element Positive Temperature Coefficient
  • This ceramic thermistor is a very strong temperature-dependent semiconductor resistor. This means that with increasing temperature the resistance of the ceramic element increases very much. This raises regardless of the boundary conditions - such. B. applied voltage, nominal resistance, air flow above the PTC element - a very uniform surface temperature at the PTC element, which has the advantage that overheating is prevented, as z. B. could occur at a normal heat-emitting heating wire, since regardless of the boundary conditions always the same resistance and thus electrical heating power is introduced.
  • Electric heaters usually use a plurality of PTC elements, which are accommodated in at least two contact plates arranged on both sides or are pressed or glued in it.
  • the heating elements are supplied by the battery systems of the motor vehicles, which have a high voltage, these high voltages can cause safety problems, and it is necessary to electrically isolate the individual heating elements.
  • a receiving device for ceramic heating elements which consists of a frame made of plastic or of a polymer ceramic or ceramic, so that the frame is electrically insulating.
  • the frame has along its length parallel longitudinal webs, which have inwardly directed longitudinal grooves.
  • the longitudinal webs are connected by spaced longitudinally arranged transverse webs.
  • the heater is inserted into the recesses between the longitudinal and transverse webs.
  • the EP 1 916 873 A1 discloses a heat-generating element for an electric heater, in which the PTC elements are surrounded by a housing, which is formed from shell elements which abut each other and must be sealed by means of a sealing strip. This makes the assembly susceptible to leaks, which can cause problems with high voltages applied.
  • the DE 32 08 802 A1 discloses an electric heater for heated appliances, wherein the provided heating plates are placed in strips of insulating material with recesses. This causes a high assembly cost, because the strip of insulating material must be stamped to the dimensions of the heating platens and the heating plates must then be inserted into the recesses.
  • a heat exchanger in particular an electric heater for a motor vehicle, having at least one heating element, which has at least one PTC element and at least one first contact plate and a second contact plate, wherein the at least one PTC element between the at least one first contact plate and the at least one second contact plate is fixed, wherein the at least one heating element is arranged completely in an electrically insulating plastic frame, wherein the at least one PTC element between the at least one first contact plate and the at least one second contact plate is fixed by gluing, the electrically insulating plastic frame is designed as a rectangular hollow profile and the electrically insulating plastic frame, in particular a plurality of electrically insulating plastic frame, is fixed in a housing frame of the heat exchanger.
  • This configuration provides a solution for electrically insulating the heating elements, which requires neither multiple nor additional parts.
  • a significant simplification of the isolation is achieved according to the invention, whereby the manufacturing cost can be reduced.
  • the at least one PTC element is fixed by gluing between the at least one first contact sheet and the at least one second contact sheet.
  • the fixation by gluing makes additional elements, such as holding frames and the like superfluous.
  • the at least one first contact plate and the at least one second contact plate each have a connector.
  • the electrically insulating plastic frame is arranged between two rib elements.
  • each of the two rib members respectively extends on one of two longitudinal sides of the electrically insulating plastic frame
  • the electrically insulating plastic frame is designed as a rectangular hollow profile.
  • the electrically insulating plastic frame has a length which substantially corresponds to the length of the at least one heating element.
  • the electrically insulating plastic frame has a width which substantially corresponds to the width of the at least one heating element.
  • the electrically insulating plastic frame has a height which substantially corresponds to the height of the at least one heating element.
  • the electrically insulating plastic frame has a height which substantially corresponds to the height of the at least one heating element.
  • the two rib elements respectively belong to a rib block, which in each case has two rib elements and a sheet metal element arranged between the two rib elements.
  • each rib block is provided at its opposite outer surfaces, which are opposite the longitudinal sides of the electrically insulating plastic frame, with a further plate-like sheet metal element.
  • the rib block has exactly one rib element, wherein a further plate-like sheet metal element is arranged on its opposite outer surfaces, which lie opposite the longitudinal sides of the electrically insulating plastic frame.
  • these sheet metal elements can also be omitted, so that the rib block directly adjoins the plastic frame.
  • each rib member is formed as a corrugated fin member.
  • each rib block is bonded to the respective rib members of the rib block. This also provides a simple and inexpensive solution for fixing or mounting a ribbed block assembly.
  • a plurality of rib blocks and a plurality of heating elements arranged in the electrically insulating plastic frame are provided in the heat exchanger.
  • the electrically insulating plastic frame in particular a plurality of electrically insulating plastic frame, is fixed in a housing frame of the heat exchanger. It is also possible according to yet another preferred embodiment, the plurality of electrically insulating plastic frame integrally or integrally formed with the housing frame of the heat exchanger.
  • Fig.1 shows a front view of the items of a heating element 1 according to the prior art.
  • the heating element 1 consists of a plate-shaped first contact plate 2 and a plate-shaped second contact plate 3, which run parallel and together form a frame. Between the first contact plate 2 and the second contact plate 3, a plurality of PTC elements 4, here 7 pieces, arranged, which are isolated by a sealing profile 5 and secured against slipping.
  • the sealing profile 5 is as an endless profile made of silicone, cut to the length of the heating element 1, and stamped with apertures 6 in which the PTC elements 4 are positioned and kept at a distance.
  • Fig. 2 shows a lower portion of a heat exchanger 7 in perspective view according to an embodiment.
  • the heat exchanger 7 comprises a housing frame 8 in which four rib blocks 9 are accommodated, each with arranged between two rib blocks 9 electrically insulating plastic frame 10.
  • the electrically insulating plastic frame 10 are formed as separate components and each fixed to the housing frame 8
  • Each electrically insulating plastic frame 10 is formed as a rectangular hollow profile and thus forms a receptacle for each heating element 1, which substantially the dimensions of the plastic frame 10 corresponds or is slightly smaller.
  • each of the first and second contact sheets 2, 3 has a connector 12 for connecting the first and second contact sheets 2, 3 and the associated PTC elements 4 to a power supply via cables or bus bars connectable thereto (not shown) ,
  • Fig. 3 shows a rib block 9, which consists of two rib elements 13, 13 ', which are formed as corrugated ribs, and of three plate-shaped sheet metal elements 14.
  • One of the three sheet metal elements 14 is arranged between the two rib elements 13, 13 'and in each case a further one is arranged on the respective outer surface of the rib elements 13, 13'.
  • the fixing of the sheet metal elements 14 to the rib elements 13, 13 ' also takes place by gluing by means of a good thermal conductivity adhesive.
  • Fig. 4 shows a lower portion of a heat exchanger 7 in a perspective view according to an embodiment, wherein the heat exchanger 7 has three electrically insulating plastic frame 10, in each of which a heating element 1 is completely accommodated, so that only the respective connectors 12 protrude from the electrically insulating plastic frame 10.
  • Fig. 5 shows a perspective view of a heat exchanger 7 according to an embodiment, wherein the heating elements 1 in the respective electrically insulating plastic frame 10, which are formed in the embodiment integral with the housing frame 8, are added.

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)
  • Air-Conditioning For Vehicles (AREA)
  • Resistance Heating (AREA)

Claims (12)

  1. Echangeur de chaleur (7), en particulier dispositif de chauffage auxiliaire électrique pour un véhicule automobile, comprenant au moins un élément chauffant (1) qui présente au moins un élément (4) à coefficient de température positif - CTP - et au moins une première tôle de contact (2) et une deuxième tôle de contact (3), où l'élément CTP (4) au moins au nombre de un est fixé entre la première tôle de contact (2) au moins au nombre de un et la deuxième tôle de contact (3) au moins au nombre de un, caractérisé en ce que l'élément chauffant (1) au moins au nombre de un est disposé complètement dans un cadre électroisolant (10) en matière plastique, où l'élément CTP (4) au moins au nombre de un est fixé, par collage, entre la première tôle de contact (2) au moins au nombre de un et la deuxième tôle de contact (3) au moins au nombre de un, où le cadre électroisolant (10) en matière plastique est configuré comme un profilé creux rectangulaire, et le cadre électroisolant (10) en matière plastique, en particulier une multiplicité de cadres électroisolants (10) en matière plastique, est fixé(e) dans un cadre de boîtier (8) de l'échangeur de chaleur (7).
  2. Echangeur de chaleur (7) selon la revendication 1, caractérisé en ce que la première tôle de contact (2) au moins au nombre de un et la deuxième tôle de contact (3) au moins au nombre de un sont dotées respectivement d'un connecteur (12).
  3. Echangeur de chaleur (7) selon l'une des revendications 1 à 2, caractérisé en ce que le cadre électroisolant (10) en matière plastique est disposé entre deux éléments à ailettes (13, 13').
  4. Echangeur de chaleur (7) selon la revendication 3, caractérisé en ce que chacun des deux éléments à ailettes (13, 13') s'étend à chaque fois sur un des deux côtés longitudinaux - qui se font face - du cadre électroisolant (10) en matière plastique.
  5. Echangeur de chaleur (7) selon l'une quelconque ou plusieurs des revendications 1 à 4, caractérisé en ce que le cadre électroisolant (10) en matière plastique présente une longueur qui correspond pratiquement à la longueur de l'élément chauffant (1) au moins au nombre de un.
  6. Echangeur de chaleur (7) selon l'une quelconque ou plusieurs des revendications 1 à 5, caractérisé en ce que le cadre électroisolant (10) en matière plastique présente une largeur qui correspond pratiquement à la largeur de l'élément chauffant (1) au moins au nombre de un.
  7. Echangeur de chaleur (7) selon l'une quelconque ou plusieurs des revendications 1 à 6, caractérisé en ce que le cadre électroisolant (10) en matière plastique présente une hauteur qui correspond pratiquement à la hauteur de l'élément chauffant (1) au moins au nombre de un.
  8. Echangeur de chaleur (7) selon l'une quelconque ou plusieurs des revendications 3 à 7, caractérisé en ce que les deux éléments à ailettes (13, 13') appartiennent respectivement à un bloc d'ailettes (9) qui présente à chaque fois deux éléments à ailettes (13, 13') et un élément en tôle (14) disposé entre les deux éléments à ailettes (13, 13').
  9. Echangeur de chaleur (7) selon la revendication 8, caractérisé en ce que chaque bloc d'ailettes (9), sur ses surfaces extérieures opposées qui font face aux côtés longitudinaux du cadre électroisolant (10) en matière plastique, est doté d'un autre élément en tôle (14) en forme de plaque.
  10. Echangeur de chaleur (7) selon l'une quelconque ou plusieurs des revendications 3 à 9, caractérisé en ce que chaque élément à ailette (13, 13') est configuré comme un élément à ailette ondulée.
  11. Echangeur de chaleur (7) selon la revendication 9 ou 10, caractérisé en ce que les éléments en tôle (14) de chaque bloc d'ailettes (9) sont collés avec les éléments à ailettes respectifs (13, 13') du bloc d'ailettes (9).
  12. Echangeur de chaleur (7) selon l'une quelconque ou plusieurs des revendications 9 à 11, caractérisé en ce qu'il est prévu, dans l'échangeur de chaleur (7), une multiplicité de blocs d'ailettes (9) et une multiplicité d'éléments chauffants (1) disposés dans le cadre électroisolant (10) en matière plastique.
EP09290702.1A 2009-09-15 2009-09-15 Caloporteur Not-in-force EP2296432B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09290702.1A EP2296432B1 (fr) 2009-09-15 2009-09-15 Caloporteur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09290702.1A EP2296432B1 (fr) 2009-09-15 2009-09-15 Caloporteur

Publications (2)

Publication Number Publication Date
EP2296432A1 EP2296432A1 (fr) 2011-03-16
EP2296432B1 true EP2296432B1 (fr) 2018-01-03

Family

ID=41508749

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09290702.1A Not-in-force EP2296432B1 (fr) 2009-09-15 2009-09-15 Caloporteur

Country Status (1)

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EP (1) EP2296432B1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010020070A1 (de) * 2010-05-09 2011-11-10 Esw Gmbh Heizmodul zur Erwärmung strömender Medien und Verfahren zu seiner Herstellung
DE102013105686B4 (de) 2013-06-03 2015-10-08 Borgwarner Ludwigsburg Gmbh Fahrzeugheizung
DE102020203390A1 (de) 2020-03-17 2021-09-23 Eberspächer catem Hermsdorf GmbH & Co. KG Elektrische heizeinrichtung und verfahren zu deren herstellung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3208802A1 (de) * 1980-12-13 1983-09-22 C.S. Fudickar Kg, 5600 Wuppertal Elektrische heizvorrichtung fuer beheizte apparate
ES2194658T3 (es) * 2000-08-25 2003-12-01 Catem Gmbh & Co Kg Dispositivo calefactor de ptc que usa un adhesivo.
DE20305936U1 (de) 2003-04-12 2003-07-24 Beru AG, 71636 Ludwigsburg Vorrichtung zur Aufnahme von Keramik-Heizelementen
DE502006003627D1 (de) * 2006-10-25 2009-06-10 Catem Gmbh & Co Kg Wärmeerzeugendes Element für eine elektrische Heizvorrichtung und Verfahren zur Herstellung derselben

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
EP2296432A1 (fr) 2011-03-16

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