EP2017549B1 - Dispositif de chauffage électrique - Google Patents

Dispositif de chauffage électrique Download PDF

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Publication number
EP2017549B1
EP2017549B1 EP07014721A EP07014721A EP2017549B1 EP 2017549 B1 EP2017549 B1 EP 2017549B1 EP 07014721 A EP07014721 A EP 07014721A EP 07014721 A EP07014721 A EP 07014721A EP 2017549 B1 EP2017549 B1 EP 2017549B1
Authority
EP
European Patent Office
Prior art keywords
housing
spring
heating block
spring element
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.)
Ceased
Application number
EP07014721A
Other languages
German (de)
English (en)
Other versions
EP2017549A1 (fr
Inventor
Franz Bohlender
Michael Niederer
Michael Zeyen
Rainer Wünstel
Detlef Stephan
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.)
Eberspaecher Catem GmbH and Co KG
Original Assignee
Eberspaecher Catem 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 Eberspaecher Catem GmbH and Co KG filed Critical Eberspaecher Catem GmbH and Co KG
Priority to EP07014721A priority Critical patent/EP2017549B1/fr
Publication of EP2017549A1 publication Critical patent/EP2017549A1/fr
Application granted granted Critical
Publication of EP2017549B1 publication Critical patent/EP2017549B1/fr
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F24H3/04—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
    • F24H3/0435—Structures comprising heat spreading elements in the form of 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
    • F24H3/0441—Interfaces between the electrodes of a resistive heating element and the power supply 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
    • 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
    • F24H3/0441—Interfaces between the electrodes of a resistive heating element and the power supply means
    • F24H3/0447—Forms of the electrode terminals, e.g. tongues or clips
    • 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
    • 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
    • F24H3/0476—Means for putting the electric heaters in the frame under strain, e.g. with springs
    • 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

Definitions

  • the present invention relates to an electric heater, which is used in particular as a heater in a motor vehicle for heating air, with a heating block, which is held in an opposite frame opening forming housing and comprises parallel layers of heat-emitting and heat-generating elements.
  • the present invention relates to an electric heating device with the preamble features of claim 1.
  • Such a heater for air conditioning the interior of a motor vehicle is for example from the EP 1 564 503 known.
  • the heat-generating elements of the heating block usually comprise a plurality of one above the other in a plane provided PTC heating elements, which are arranged between conductor tracks, which are usually formed by metal strips. These tracks are energized with different polarity.
  • the conductor tracks are applied under bias of at least one spring element received in the housing against the PTC heating elements. It is important to ensure that there is good contact between the tracks and the PTC heating elements for disengaging the heat generated by the PTC heating elements and for coupling current.
  • One or more heat-generating elements may be provided as part of the heating block.
  • the heat generated by the heat-generating elements is discharged through heat-emitting elements to the medium to be heated, ie the air.
  • the frame openings are usually parallel to each other on opposite sides of a substantially flat, frame-shaped housing.
  • the heat-emitting elements are usually formed of meandering bent metal strips that form corrugated fins. These corrugated ribs rest on one or both sides of heat-emitting elements.
  • the heating block comprises a plurality of layers of heat-emitting and heat-generating elements, wherein care must also be taken with regard to the heat extraction that the heat-emitting elements abut well on the heat-generating elements.
  • the heat-emitting elements can be firmly connected to the heat-generating elements and / or applied by at least one received in the housing spring element under bias.
  • the spring element permanently maintains its elastic bias. Otherwise, increased resistances may result at the phase boundaries of live components of the heating block.
  • the present invention seeks to provide an electric heater which is easy to manufacture and can perform its function permanently and reliably.
  • the present invention provides an electric heating device having the features of claim 1. This differs from the generic state of the art in that the spring element has fitting elements and that fitting elements assigned to these fitting elements are provided on the housing and / or the heating block, the fitting elements and the fitting counterparts being designed and matched to one another such that it is not possible is to introduce the spring element in the wrong orientation in the housing.
  • the fitting counter-elements may be formed, for example, by individual layers of the heating block to allow a clear assignment of the spring element within the heating block.
  • the fitting counter-elements can also be formed by the housing. It is advisable to provide the spring element on the edge of the heating block and form the fitting counter-elements in the region of a contact surface, which is provided on at least one of the heating block and the spring element circumferentially surrounding wall of the housing.
  • the spring element may also have matching elements which protrude beyond the heating block and are received in fitting element receptacles of the housing, wherein the end provided fitting elements and the associated fitting element receptacles only has the function to allow a clear assembly and mounting of the spring element within the housing. It is not important that the spring element is provided at the edge of the heating block. Corresponding spring elements can be installed in the middle or at any other place in the heating block.
  • the spring element preferably has a contouring in the direction of the layers of the heating block, which forms the fitting elements and which correspond to fitting counter-elements which are provided on the housing.
  • the layers of the heating block with respect to an assignment of the parts of the heating block and the spring element in the housing be designed unspecifically.
  • identical heat-emitting or heat-generating elements can be used as part of the heating block, which is particularly advantageous in the economic production of electric heaters with a plurality of stacked layers.
  • the local assignment of the spring element within the housing is, however, predetermined by a formed on the housing counter contour.
  • an embodiment which can be easily assembled, since the respective spring element is formed as a one-piece component, which extends over the entire length of the heating block.
  • the respective spring element is formed as a one-piece component, which extends over the entire length of the heating block.
  • spaced apart spring legs contouring is formed, which allows an unambiguous positioning of the spring element in the housing, if this contouring a corresponding Jacobkonturtechnik on the housings and / or the layers of the heating block is realized.
  • the housing preferably forms spring leg receptacles which are matched to the arrangement of the spring legs such that the spring element fits into the housing together with the heating block only when the spring legs are received in the spring leg receptacles.
  • spring leg receptacles which are matched to the arrangement of the spring legs such that the spring element fits into the housing together with the heating block only when the spring legs are received in the spring leg receptacles.
  • on a longitudinal side of the housing i. be realized in the direction of extension of the layers of the heating block identically formed spring leg recordings. This embodiment ensures that the spring legs are each aligned with respect to the heating block to the outside.
  • the spring element itself may be cut from a continuous material, i. adjacent spring legs may each have identical distances.
  • the distances between adjacent spring legs and thus the width of the free spaces provided therebetween may vary.
  • a corresponding mating contour is provided in this preferred embodiment on the side of the housing, so that the spring element can be installed only on the outside facing away from the heating block in the housing with its spring legs on the one hand, and on the other hand certain spring legs assigned to specific positions within the housing.
  • the Fig. 1 shows a perspective side view of an embodiment of the electric heater with a housing 2, consisting of a lower housing part 4 and an upper housing part 6. Both housing parts 4, 6 are positively connected to each other and take in a heating block 8, which arranged from a plurality of parallel layers to each other heat-generating elements 10 and heat-emitting elements 12 consists.
  • the heat-emitting elements 12 are formed as corrugated rib elements of meandering bent sheet metal strip.
  • contact tongues 15 are arranged one above the other in the transverse direction.
  • the contact tongues pass through recesses 16 which are recessed on the housing 2 and which in each case receive a contact tongue and are predominantly formed by the housing lower part 4, but are completed at one end face by the housing upper part 6.
  • the housing 2 has two opposite frame openings, of which in Fig. 1 only the frame opening 16 formed by the upper housing part 6 can be seen.
  • the frame opening formed by the lower housing part 4 is in Fig. 4 and identified by reference numeral 18.
  • the frame openings 16, 18 are each interspersed with struts 20 which extend at right angles to the layers of the heating block 8 and connect the opposing longitudinal beams of the lower housing part 4 and upper housing part 8 with each other.
  • the Fig. 2 shows details of the heating block 8 and its inclusion in particular in the lower housing part 4 and shows the lower housing part 4 in a plan view with the housing upper part removed.
  • the heat-emitting elements 12 are only incompletely shown at the respective front ends of the housing lower part 4. Accordingly, the illustration in Fig. 2 also a view of the frame opening 18 formed by the lower housing part 4 free.
  • the exemplary embodiment shown has four heat-generating elements 10, which are each accommodated in the housing lower part 4 in an insulating manner and with a certain mobility transverse to the layers of the layer structure (heating block 8).
  • the lower housing part 4 has for this purpose fitting element receptacles 22, which are a receptacle 24, which is formed essentially by the lower housing part 4 and the heating block 8 receives open.
  • fitting element receptacles 22a, 22b are provided at each end face of the lower housing part (cf. Fig. 3 ).
  • the heat-generating elements 10 have at their front ends fitting elements 26a, 26b which respectively fit only in the corresponding corresponding fitting element receptacle 22a or 22b.
  • the corresponding fitting element receptacles 22 are matched to the fitting elements 26 provided corresponding thereto, that the heat-generating elements 10 are movable by a few tenths of a millimeter transversely to the longitudinal extent of the layers of the heating block 8 in the housing 2.
  • the outer fitting elements 26a are designed as a hammer head and engage in correspondingly formed fitting element receptacles 22a.
  • the fitting elements 26b associated with these elongated fitting element receptacles 22b are rod-shaped and less wide than the hammer-head-like fitting elements 26a. Due to this particular configuration, the central heat-generating elements 10 do not fit in the outer positions for heat-generating elements 10 of the heating block. In a corresponding manner, the outer heat-generating elements can not be arranged in the middle of the heating block, ie insert into the housing 2.
  • the heat-generating elements 10 can not be used anywhere in the housing 2, the heat-emitting corrugated fin elements 12 are nonspecific and as lengths of a meandering curved first sheet metal strip as manufactured and cut from this continuous material to length. Each individual heat-emitting element 12 can be used at any position for a heat-emitting element within the heating block 8.
  • the fitting elements 26 are integrally formed on a positioning frame 28, which in the 6 and 7 can be seen and explained in more detail below with reference to these figures.
  • the positioning frame 28 is made of an insulating material and serves for the positioning of PTC heating elements 30.
  • a receptacle 32 in the positioning frame 28 is recessed for each individual PTC heating element 30, which surrounds this PTC heating element and thus defines it.
  • sheet metal strips 34, 36 are sheet metal strips 34, 36, which form electrical conductor tracks for energizing the PTC heating elements 30 and via which the heat generated by the PTC heating elements is conducted to the heat-emitting elements 12 by means of heat transfer. These lie directly on the metal bands 34, 36 at.
  • the front ends of the positioning frame 28 are extended over a fitting element web 38 on the position of the metal strips 34, 36 addition.
  • the respective fitting elements 26 of the positioning frame 28 At the outer end of the fitting element webs 38 are the respective fitting elements 26 of the positioning frame 28.
  • the vast extent of the position frame 28 in the width direction of the respective metal bands 34, 36 is taken.
  • the positioning frame on holding webs 40 which are provided immediately adjacent to the lateral edge of the metal strips 34, 36 and the corresponding metal strips 34, 36 project beyond the top and these overlap on the outside, preferably with the tracks 34, 36 in contact and abut this.
  • the holding webs 40 are formed in the embodiment shown in one piece by way of injection molding initially as a right angle to the main extension direction of the position frame 28 outgoing projections.
  • the distance of opposing projections is selected so that the sheet metal strip 34 or 36 just fits between these projections.
  • the one-piece component thus produced by injection molding is then provided with the essential parts of the heat-generating element 10, i. the PTC heating elements 30 are inserted into the corresponding receptacle 32 and surrounded on both sides by the metal strips 34, 36. Thereafter, the projections are plastically deformed inwardly and so the interconnects 34, 36 formed across.
  • a hot forming is used, in which the holding webs 40 forming material locally in the area of the metal strips 34, 36 warms up and thus softened.
  • the means used in each case can locally heat the position frame 28, for example by means of hot air or by heat conduction.
  • the heating effecting agent is preferably formed by a tool which simultaneously performs the transformation of the retaining webs 40.
  • the holding webs 40 are not continuous in the longitudinal direction of the heat-generating element 10, but are provided in sections 40.1 to 40.5. These sections 40.1 to 40.5 leave between them a passage 41 free, which is designed such that in each case a strut 22 in the width direction between the sections 40.1; 40.2; 40.3; 40.4 or 40.5 fits.
  • the portion formed by the passage 41 leaps from the outer surface the holding webs 40 in any case so far inward that at least half the thickness of the struts 22 fits between the holding webs 40 and is received there.
  • the struts 22 and the positioning frame 28 may also be referred to as the first strut, and the retaining webs 40, which may be referred to as the second strut 43.
  • the heat-generating element 10 is formed as a preassembled component and can thus be handled during assembly, without the risk that the conductor tracks 34, 36 or even the inserted in the position frame 28 PTC heating elements 30 are lost. It should be noted, however, that usually the holding webs only fix the metal strips 34, 36 in the position frame, but not with a contact force against the PTC heating elements 30 put, which is sufficient to energize the PTC heating elements 30 during operation safe. This is in any case effected in the embodiment discussed in the context of the present invention by a spring element, which will be described below with reference to the Fig. 8 to 10 will be explained in more detail.
  • Fig. 3 and 6 are a metal strip, namely in Fig. 6 shown sheet metal strip 34, bent out of the plane of the heat generating element 10. Accordingly, an offset 42 results between the plane in which the sheet metal strip 34 abuts against the PTC heating elements 30, and a free end 44, which by repeated, but opposite bending extends parallel to the first-mentioned main portion of the sheet metal strip 34. Again Fig. 3 can be seen, this free end 44 is mechanically and electrically connected by a crimp 46 to the associated contact tongue 14.
  • upper heat-emitting elements have an outgoing from the upper sheet metal strip 34 offset 42.3 and 42.4.
  • the lower heat generating element 10.1 has a downwardly outgoing offset 42.1.
  • the metal strips 34, 36 of the marked with reference numeral 10.2 heat generating element 10 are on both sides to form an offset 42.20 or 42.21 arc and each provided with a contact tongue 14. Due to these differences, it is possible to avoid exchanging the positions for the heat-generating elements 10.3 and 10.2 within the housing 2.
  • the embodiment allows that the two middle heat-generating elements 10.2 and 10.3 can be interchanged with one another due to the design of contact tongue receivers 48. A corresponding interchangeability is also given for the two outer heat-generating elements 10.1 and 10.4.
  • the lower housing part 4 can be molded in an injection mold that can be produced cost-effectively, since all areas significant for the housing 4 extend parallel or at right angles to the frame opening 18 of the housing lower part 4.
  • the lower housing part 4 initially substantially mutually perpendicular frame surfaces 52a-d, which surround the heating block 8 circumferentially and perpendicular to the plane containing the frame opening 18 includes.
  • the corresponding frame surface 52b opens outward via four fitting element web receivers 54 whose main walls likewise extend at right angles to the plane containing the frame opening 18.
  • a corresponding extension have those functional surfaces of the housing lower part 4, which form the contact tongue receptacle 48 and the here leading slots 15 and 50 substantially and those walls which limit the fitting element receptacle 22 and in Fig. 3 are shown.
  • the receptacles 15, 22, 50 and 54 described above are bounded on the side of the lower housing part 4 by a bottom which runs parallel to the plane containing the frame opening 18 of the housing lower part 4.
  • This receiving floor is in Fig. 4 designated by reference numeral 56.
  • This bottom 56 also forms the inner surface of the struts 22 and edge-side stops 58, 60 for the yet to be explained spring element on the one hand and for the located on the opposite longitudinal side outer heat-emitting element 12 on the other.
  • These stops 58 and 60 in turn are parallel to the plane which also contains the frame opening 18.
  • a pin guide 70 which is formed with a relatively short length and opens to a window 74 which lies on the outside of the housing lower part 4.
  • the pin guide 68 Adjacent to this central pin guide 70, the pin guide 68 is provided, each extending over about 1/3 of the length of the longitudinal bars 64, 66.
  • pin guides 70 At the outer end of these pin guides 68 are in turn pin guides 70 with associated windows 74, as described above.
  • At the front ends of the longitudinal beams 64, 66 turn relatively small pin guides 72 are formed, which extend from the inner surface of the longitudinal bars 64, 66 to the outer surface of the housing base, which also includes the frame opening 18.
  • the functional surfaces forming the pin guides 68, 70, 72 all extend at right angles to the plane containing the frame opening 18. Only the front edges of the corresponding openings 68 to 72 are slightly chamfered or rounded in order to facilitate the insertion of corresponding guide pins 76 to 80 of the upper housing part 6. To facilitate connection of the lower housing part 4 and the upper housing part, the free ends of the walls are further chamfered or rounded, which delimit the spacers 62 and the receptacles 22b, 15, 50, 48 at the end and form the upper ends of the spacers 62.
  • FIG. 5 shown in perspective housing upper part 6 also has only orthogonal or parallel to the corresponding housing opening 16 aligned functional and boundary surfaces.
  • the guide surfaces of the previously mentioned guide pins 76, 78, 80 are provided as functional surfaces, which can be introduced into the corresponding pin guides 68, 70, 72.
  • the guide pins 78 are formed as latching pins and form latching webs 82, which are surmounted on the upper side by a thickened head of the latching pin 78, which form a latching surface 86 which extends parallel to the plane which also contains the frame opening 16.
  • the latching webs 82 are derived from the top of a cover 88, which is formed as a substantially planar member and the frame opening 16 predetermines and further includes the outer surface of the struts 22.
  • the cover 88 is formed frame-shaped as a cover for the lower housing part 4. Accordingly, the guide pin 76 to 80 from the inside of the cover 88 are perpendicular from.
  • a bulge 90 is provided for the locking webs 82. In the area of the bulge 90, the edge surface of the cover 88 is retracted inwards, so that the flat planar side surface of the latching web 82 extends parallel to the guide surfaces of the guide pins 76 and 80, but inwardly to the respective outer guide surface of these guide pins 76, 80th lies.
  • the heating block 8 facing inner surfaces of the corresponding guide pins 78 to 80 are, however, in a plane.
  • a further guide pin 92 is provided, which cooperates with a corresponding thereto recessed on the lower housing part 4 further guide recess 94, but does not fit into the fitting element receptacles 22 and the Reeds 48, so that it is ensured that the upper housing part 6 in dismissstimmter and clearly placed on the lower housing part 4 and joined with this.
  • the walls surrounding the further pin guide 94 and forming the guide pin 92 also extend at right angles to the plane lying on the frame opening 16 or 18.
  • the Fig. 8 shows a perspective side view of a spring element 96, which abuts the edge of the heating block 8 and in its installed position at the height of the heating block. 8 located.
  • front side of the spring element 96 forms a flat contact surface 98, at which the adjacent, in Fig. 3 uppermost heat-emitting element rests with its lamellae. More precisely, the ends, which are bent over at the ends, lie more meandering lamellae of the corrugated ribbed strip 12 against this contact surface 98.
  • the abutment surface 98 is formed by a first flat sheet metal strip on which both sides transverse outgoing leg spring 100 have been formed by punching, which are initially within the plane of the contact surface 98 and after punching by bending in the as in the Fig. 8 . 10 . 11 and 12 recognizable shape have been brought.
  • Two spring legs 100o, 100u lie in the width direction, ie transversely to the longitudinal extent of the planar contact surface 98 and thus in the insertion direction of the spring element 96 during assembly above the other.
  • Each individual spring limb 100o, 100u forms an inclined sliding surface 102a, 102b, 102c, which in each case enclose an angle of between 35 and 55 °, preferably of approximately 45 °, between itself and the planar contact surface.
  • Between the longitudinal direction of the spring element 96 successively provided pairs of spring legs 100 are flat segments 104, in which the spring element 96 is formed as a rectangular flat sheet metal strip.
  • spring element 96 has pairs of spring legs 100o, 100u corresponding to the number of spaces between the individual spacers 62 on the longitudinal spar 64 (see. Fig. 4 ). Each pair of spring legs 100o, 100u is in the installed position of the spring element 96 between these spacers 62.
  • the flat segment 104 bridges the width of the spacers 62 and connects adjacent spring leg pairs 100o, 100u together.
  • the correspondingly produced spring can thus be introduced as a one-piece component into the housing 2, in particular in the housing lower part 4, which simplifies the production of the electrical heating device.
  • the wall portions of the frame surface 42c provided between adjacent spacers 62 accordingly form a support surface 106 for the respective pairs of spring legs 100.
  • the spring element 96 Due to the vote of the spring element 100, especially the configuration of the flat segments 104 between the pairs of superposed spring legs 100, it is not possible to introduce the spring element 96 in the wrong orientation in the lower housing part 4.
  • the spring element 96 can only be moved into its installed position, in which the spring element is accommodated at the level of the heating block 8 in the housing 2, when the flat contact surface 98 is aligned with the heating block.
  • the heating block is held by the spacers 62 at a distance from the support surfaces 106, so that the spring element 96 when inserted into the housing lower part 4 at any time and without interference from the heating block 8 can be applied to these surfaces.
  • the spring element 96 With a progressive insertion movement of the spring element 96 in the direction of the heating block 8, i. with progressive introduction into the heating block, the spring element 96 is then forced urgently due to the spring force through the lower spring leg 100u in the direction of the heating block 8, so that the layers 10, 12 of the heating block are compressed.
  • the flat contact surface 98 then already has such an overlap with the adjacent heat-emitting element 12, that the spring element 96 is sufficiently guided in the direction of insertion between the heating block 8 and the lower housing part 4 with progressive Einbringterrorism.
  • the lower spring leg 100u is finally elastically compressed.
  • the housing-side counterforce is formed by an upper edge 108 which is formed between the support surface 106 and the inner surface of the longitudinal beam 64 through the joint of the two surfaces.
  • the housing 2 has a further housing element, which cooperates with the spring element 96.
  • This further housing element is formed by an edge 110 of the housing top 6, which is formed between the inner surface of the cover 88 and a bottom 112 of the housing top 6, by the abutting edge of an outer edge 113 defining the bottom 112 of the housing top with the inner surface the cover 88.
  • the height offset between this bottom 112 and the inner surface of the cover 88 takes into account the fact that the heating block 8 projects beyond the surface formed by the longitudinal bars 64, 66 surface 63, approximately the same length as the spacers 62nd the inner surface 63 of the longitudinal bars 64, 66 projects beyond.
  • the edge 110 abuts an inclined sliding surface 102a of the spring element 96, which is formed by the upper spring leg 100o.
  • Fig. 10 and 12a it can be seen, is the upper end of the spring element 96 in a substantially pressure-free state at a distance from the bottom 112 of the upper housing part. 6
  • the individual layers 10, 12 are introduced into the lower housing part 4. Thereafter, the spring element 96 is manually inserted a little way into the lower housing part, at least until the layers of the heating block 8 against each other and the spring element 96 is provided sufficiently deep between the heating block 6 and the frame surface 52c.
  • the guide pins 76, 78, 80, 92 in this case engage in the corresponding pin guides 68, 70, 72, 94 a.
  • the spring element 96 initially remains essentially free of tension. In this state, a sufficient overlap between the guide pin and the corresponding recesses can already be achieved, so that the two housing parts 4, 6 can be displaced relative to one another only in a linear direction. Thereafter, the joining of the housing parts 4, 6 under application of the spring force.
  • the spring legs 100o, 100u are slightly compressed until the bottom 112 of the upper housing part 6 abuts against the upper end of the spring element 96 (see. Fig. 12b ).
  • the two edges 108 and 100 have already slid over a certain distance along the inclined sliding surfaces 102a and 102b.
  • the upper spring leg 100o is already elastically bent inwards so that, as the insertion movement progresses, the free end of the leg 100o, which forms a further inclined sliding surface 102c in the center of the spring element 96, can pass the edge 108 reliably. Thereafter, a progressive joining movement between the two housing parts 4, 6 also leads to the entrainment of the spring element 96.
  • the spring element 96 is clamped and held in this installation position due to the spring tension between the heating block 8 and the frame surface 52c. If the spring element 96 is displaced by an unintentional force from the outside, in each case the stop 58 or the bottom 112 of the housing upper part 6 prevents the spring element 96 from being forced out of the housing 2.
  • the spring element is spent in closing the housing by joining the lower housing part and upper housing part in its installation position in which the spring element is at the level of the heating block, that is arranged in that plane is, which is also occupied by the heating block. Furthermore, the spring element is placed under spring preload only during insertion, and that only when the two housing parts 4, 6 are guided by positive engagement of the guide pins 76 to 80 in the corresponding pin guides 68, 70, 72 relative to each other.
  • the structural design accordingly offers the possibility of stress-free to introduce the components of the heating block in the housing 24 formed by the housing 2. Only then is the spring tension, and in fact adjacent to each other and within limits against each other positioned housing parts 4, 6.
  • a spring element may be provided, which has a spring leg, which is initially substantially free of tension in the installed position.
  • This spring element is introduced stress-free together with the heating block in the receptacle 24.
  • the spring element has a spring leg, the spring leg forms a in the direction of the stop 58 outwardly and downwardly inclined sliding surface forms, for a pin which cooperates with the spring element and the corresponding spring leg when joining the upper housing part and lower housing part under spring preload sets, so that the spring element is applied in total against the heating block 8 under spring tension.
  • the spring element is initially taken free of stress together with the heating block in the lower housing part and remains stationary when generating the spring preload relative to the joining direction.
  • the spring element is slightly displaced only in the plane of the heating block and applied to the heating block.
  • the or the spring leg is pivoted to produce the elastic bias.
  • the particular design of the heat generating elements 10 allows for easier assembly, since the grid assembly formed by the first and second struts 20, 43 is not completely part of the housing, but the second struts are formed with the frame 28 and thus is located where the PTC heating elements 30 come to rest within the heating block 8.
  • housing parts can be produced accordingly, which are relatively simple.
  • the heat-emitting element 12 is prepared as a preassembled unit and further ensured by the fitting elements 26 and the associated receptacles 22 that the heat-generating elements 12 can be installed only at predetermined locations within the housing 2, the manufacture of the electric heater, in particular the assembly of the items also be done by less experienced staff.
  • the specific embodiment of the embodiment provides an unambiguous assignment of different components of the electric heater. If this clear assignment is not met, the components of the electric heater can not be mounted.

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)
  • Air-Conditioning For Vehicles (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)

Claims (8)

  1. Dispositif de chauffage électrique comprenant un bloc de chauffage plan (8) qui est maintenu dans un boîtier (2) constituant des ouvertures de châssis opposées (16, 18) sous la précontrainte d'au moins un élément de ressort (96) et qui comporte des couches parallèles d'éléments de production et d'émission de chaleur (10, 12), caractérisé
    en ce que l'élément de ressort (96) comporte des éléments de positionnement (100, 104) dont les contre-éléments de positionnement (62,106) sont associés au boîtier et/ou au bloc de chauffage, moyennant quoi les éléments de positionnement (100, 104) et les contre-éléments de positionnement associés (62, 106) sont constitués et ajustés entre eux de telle sorte qu'il n'est pas possible d'introduire l'élément de ressort (96) dans le boîtier par une orientation incorrecte.
  2. Dispositif de chauffage électrique selon la revendication 1, caractérisé en ce que les éléments de positionnement (100, 104) sont constitués par un profilage de l'élément de ressort (96) en direction des couches du bloc de chauffage, en ce que l'élément de ressort (96) est agencé entre le bloc de chauffage (8) et le boîtier (2), et en ce que le boîtier (2) comporte un contre-profil (100, 104) correspondant au profilage et formant les contre-éléments de positionnement.
  3. Dispositif de chauffage électrique selon la revendication 2, caractérisé en ce que l'élément de ressort (96) comporte une bande de tôle qui s'étend essentiellement sur toute la longueur du bloc de chauffage (8) et en ce que le profilage comprend plusieurs pattes de ressort (100) conformées d'une seule pièce dans la bande de tôle par estampage et pliage, agencées l'une derrière l'autre et espacées en direction longitudinale de la bande de tôle.
  4. Dispositif de chauffage électrique selon la revendication 3, caractérisé en ce que le boîtier (2) constitue des logements de patte de ressort (106) et en ce que la patte de ressort (100) et les logements de patte de ressort (106) sont ajustés respectivement de telle sorte que l'élément de ressort (96), conjointement avec le bloc de chauffage, s'emboîte simplement dans le boîtier (2) via des pattes de ressort (100) comprises dans les logements de patte de ressort (106).
  5. Dispositif de chauffage électrique selon l'une des revendications précédentes, caractérisé en ce que l'élément de ressort (96) constitue une surface de contact plane (98) sur laquelle s'appuie le bloc de chauffage (8) par un côté extérieur.
  6. Dispositif de chauffage électrique selon la revendication 5, caractérisé en ce que l'élément de ressort (96) comporte une bande de tôle plane sur laquelle s'appuie directement un des éléments dispensateurs de chaleur (12) du bloc de chauffage (8), qui est constitué par une ailette ondulée courbe.
  7. Dispositif de chauffage électrique selon l'une des revendications précédentes, caractérisé en ce que plusieurs pattes de ressort (100) sont pourvues successivement en direction longitudinale de l'élément de ressort (96) et reliées entre elles par des segments (104) essentiellement plats d'une bande de tôle qui relie entre elles lesdites pattes de ressort (100), et en ce que le boîtier comporte des entretoises (62) pour les segments plats (104) qui dépassent d'une surface d'appui (106) pour les pattes de ressort (100) en direction du bloc de chauffage (8).
  8. Dispositif de chauffage électrique selon la revendication 7, caractérisé en ce que les entretoises (62) constituent une surface de guidage pour l'élément de ressort (96) au moins pour l'insertion initiale du ressort dans le bloc de chauffage (8).
EP07014721A 2007-07-18 2007-07-26 Dispositif de chauffage électrique Ceased EP2017549B1 (fr)

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EP07014115A EP2017545B1 (fr) 2007-07-18 2007-07-18 Dispositif de chauffage électrique
EP07014721A EP2017549B1 (fr) 2007-07-18 2007-07-26 Dispositif de chauffage électrique

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EP2017549B1 true EP2017549B1 (fr) 2012-05-02

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EP07014721A Ceased EP2017549B1 (fr) 2007-07-18 2007-07-26 Dispositif de chauffage électrique
EP08000980A Active EP2019268B1 (fr) 2007-07-18 2008-01-18 Chauffage électrique

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EP (3) EP2017545B1 (fr)
JP (2) JP4856127B2 (fr)
KR (2) KR101028509B1 (fr)
CN (2) CN101349475B (fr)
ES (1) ES2382138T3 (fr)

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Also Published As

Publication number Publication date
EP2017545B1 (fr) 2012-04-25
JP4856127B2 (ja) 2012-01-18
ES2382138T3 (es) 2012-06-05
JP4856128B2 (ja) 2012-01-18
EP2019268B1 (fr) 2012-12-26
CN101349476B (zh) 2010-06-02
CN101349475B (zh) 2011-07-27
JP2009051494A (ja) 2009-03-12
US20090020619A1 (en) 2009-01-22
US20090026189A1 (en) 2009-01-29
KR20090009130A (ko) 2009-01-22
KR20090009131A (ko) 2009-01-22
EP2017549A1 (fr) 2009-01-21
KR100970043B1 (ko) 2010-07-16
KR101028509B1 (ko) 2011-04-11
CN101349475A (zh) 2009-01-21
JP2009035247A (ja) 2009-02-19
EP2019268A2 (fr) 2009-01-28
EP2017545A1 (fr) 2009-01-21
US8680435B2 (en) 2014-03-25
EP2019268A3 (fr) 2010-07-07
CN101349476A (zh) 2009-01-21

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