EP2017547A1 - Dispositif de chauffage électrique - Google Patents

Dispositif de chauffage électrique Download PDF

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Publication number
EP2017547A1
EP2017547A1 EP07014117A EP07014117A EP2017547A1 EP 2017547 A1 EP2017547 A1 EP 2017547A1 EP 07014117 A EP07014117 A EP 07014117A EP 07014117 A EP07014117 A EP 07014117A EP 2017547 A1 EP2017547 A1 EP 2017547A1
Authority
EP
European Patent Office
Prior art keywords
housing
heating block
heat
frame opening
spring element
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
EP07014117A
Other languages
German (de)
English (en)
Other versions
EP2017547B1 (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
Catem GmbH and Co KG
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 Catem GmbH and Co KG, Eberspaecher Catem GmbH and Co KG filed Critical Catem GmbH and Co KG
Priority to EP07014117.1A priority Critical patent/EP2017547B1/fr
Publication of EP2017547A1 publication Critical patent/EP2017547A1/fr
Application granted granted Critical
Publication of EP2017547B1 publication Critical patent/EP2017547B1/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
    • 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
    • F24H9/1872—PTC resistor

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 PTC elements can be glued to these tracks. It is also possible to apply the printed conductors under prestress against the PTC heating elements. In any case, it must be ensured that there is good contact between the conductor tracks and the PTC heating elements for decoupling the heat generated by the PTC heating elements and for coupling in 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 heat-emitting element can also be formed by an extruded aluminum profile which forms webs which extend substantially perpendicular to the layers of the layer structure comprising the heat-emitting and the heat-generating elements.
  • the trace i. the generally planar contact surface for the PTC heating element are formed by the outer surface of such an extruded aluminum profile.
  • the contact surface for the PTC heating elements are designed to be electrically conductive and electrically connected to the housing usually held in isolation from each other held contacts. In the former case, the contacts are usually formed by the exposed ends of the metal strips.
  • the layered heating block of parallel heat-emitting and heat-generating elements, optionally with the addition of one or more parallel thereto extending spring elements is preferably held in a housing having a U-shaped cross-section.
  • the frame When loading the layer structure with a spring, the frame should be dimensioned so that the spring force can hold permanently even at the elevated temperatures.
  • the insulating frame is nowadays produced not least for economic reasons as an injection molded part.
  • Usual housing today consist of a lower housing part and a housing upper part. The lower housing part forms a receptacle for the individual elements of the heating block and, if necessary, the spring element. In this lower housing part, the individual elements of the heating block are arranged.
  • the heating block is enclosed by joining the upper housing part and the lower housing part in the housing.
  • edges surrounding the frame openings may partially cover the heating block, so that the heating block is enclosed between the frame openings and held in the housing.
  • the two housing parts are then connected to each other, for example via a latching connection.
  • the housing itself should be as simple as possible.
  • the present invention is based on the problem of specifying an electric heater which can be produced more simply and thus more cost-effectively.
  • the present invention proposes an electric heater having the features of claim 1.
  • the recording and the pin guide forming Function surface and the outer contour predetermining contour surfaces of the housing base and the guide pin forming functional surfaces and the cover limiting boundary surfaces of the housing base exclusively form so that they extend parallel or perpendicular to the frame opening comprehensive level.
  • this embodiment has the advantage that an injection molding tool for producing the lower housing part and upper housing part by means of injection molding of thermoplastics has no undercuts and due to the orthogonal orientation of the functional, contour and boundary surfaces of the housing parts mold surfaces, ie the injection mold a total of means End mill can be easily made.
  • the mold cavity forming mold cavity surface accordingly, the injection mold for the production of the housing of the heater according to the invention can be inexpensively and without special know-how create.
  • such surfaces of the housing parts are considered, which limit the inclusion of the heating block, allow the joining of the housing parts and lead the required relative movement of the housing parts.
  • contour and boundary surfaces in the sense of this development those surfaces of the housing parts are considered that define the outer contour of the housing parts and the housing as a whole. Relatively narrow end faces or edge surfaces on which two flat surfaces abut against one another at right angles do not count as corresponding functional, contour and boundary surfaces in the sense of the invention. These faces and edge surfaces may be rounded or chamfered.
  • the housing is formed in the present invention usually this preferred embodiment usually as a rectangular member which surrounds a substantially also substantially rectangular receptacle for the heating block and to his both outer sides each also defines a likewise likewise substantially rectangular housing opening.
  • the lower housing part has for this purpose a parallel to the corresponding housing opening extending contact surface, which also forms a functional surface in the sense of development and against which the heating block is applied after insertion into the lower housing part.
  • the pin guides are exposed on the opposite side of the lower housing part. These pin guides are formed in at least one of the spars, preferably on the opposite longitudinal beams of a frame member of the housing base, which surrounds the heating block circumferentially and includes in it. This frame element forms the majority of the housing base. Only in the region of the frame opening, which is formed by an end face of the frame member, extending struts, the receiving opening and enforce between the outside of the housing and the heating block are provided after it is inserted into the lower housing part.
  • the upper housing part consists essentially of a cover which extends the other, parallel to the frame opening formed by the frame member and is likewise interspersed with struts, preferably corresponding to the struts of the housing lower part.
  • This cover is a substantially flat component with only parallel or orthogonal to the frame opening of the upper part extending surfaces. From the inward surface of the cover protrude the guide pins, which accordingly extend web-shaped perpendicular to the plane containing the frame opening. Preferably, these guide pins are predominantly, if not exclusively provided on the long sides.
  • both transverse sides of the housing upper part may further be provided a pin which cooperates with a corresponding thereto formed on the lower housing part recess, which is missing on the opposite transverse side of the housing base, so that the upper housing part makes sense only in a certain orientation with the lower housing part can be connected.
  • the housing of the electric heater of the present invention preferably consists solely of the two housing parts, ie housing upper part and lower housing part. By welding, gluing or clipping on a front side of the housing, which is surmounted by electrical connection elements, a mounting flange and / or a control housing for controlling the heating block can be attached. These additional components are usually not part of the housing of the electric heater according to the invention.
  • Their housing has a flat, simple, rectangular, box-shaped outer contour in a simplified embodiment.
  • the lower housing part usually forms the receptacle for the heating block. If this is held under spring preload in the housing, it is proposed according to a preferred embodiment of the present invention that the lower housing part forms contact surfaces for the at least one spring element with which the heating block can be held under pretension in the receptacle. These contact surfaces extend only parallel or perpendicular to the plane surrounding the frame opening. It usually extend those contact surfaces for the spring element, which resist the spring force, strictly perpendicular to the plane which also contains the frame opening. In addition, and in a relatively small extent, one or more abutment surfaces are furthermore provided as abutment surfaces for the at least one spring element, against which the spring element abuts, after it has been inserted into the housing lower part. The stop surfaces thus provide the lowest position of the spring element in the lower housing part.
  • selected guide pins are designed as latching pins.
  • a surface of the latching pin which extends parallel to the movement of the joining of the lower housing part and the upper housing part lies in that plane which also encompasses the other guide surfaces of the latching journal.
  • the locking pin also serves to guide the relative movement when joining the lower housing part and the upper housing part.
  • the latching pin for connecting housing upper part and housing lower part opens with its latching surface in a window, which is formed on the outside of the housing base, namely where the associated pin guide opens.
  • the latching surface of the latching pin also extends with respect to an easy production of the injection molded plastic housing parallel to the plane comprising the frame opening.
  • a corresponding extension has the latching counter surface formed by the window.
  • a latching ridge of the latching pin projecting beyond the latching surface goes off from the outer surface of the cover and in a bulge which is formed on the outer edge of the cover.
  • the latching web preferably extends from the frame opening containing Level up to the locking surface and parallel to the guide surfaces of the guide pin.
  • the preferred development of the present invention allows a simple machining, for example, with an end mill and the locking pin-forming tool surface of the injection mold.
  • a bulge in this embodiment is preferably to understand a contour that jumps from the cover circumferentially surrounding forehead separation surface or edge side inwards and at least in the region of the detent surface dominated by the outer surface of the detent web.
  • 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 formed by the lower housing part 4 frame opening 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 open a receptacle 24, which is formed essentially by the housing lower part 4 and accommodates the heating block 8.
  • fitting element receptacles 22a, 22b are provided in the exemplary embodiment shown (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 appropriate Way, 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 which form electrical conductors for energizing the PTC heating elements 30 and via which the heat generated by the PTC heating elements to the heat-emitting elements 12 is passed by 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 section formed by the passage 41 in any case, projects inwards in relation to the outer surface of the retaining webs 40 to such an extent that at least half the thickness of the struts 22 fits between the retaining webs 40 and is accommodated 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 heat generating element 10 marked with reference numeral 10.2 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 at the Outside of the housing base 4 is located.
  • 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 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 rests against the edge of the heating block 8 and is in its installed position at the height of the heating block 8.
  • 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 can be applied to these surfaces at any time and without interference from the heating block 8 when inserted into the housing base 4.
  • the spring element 96 With a progressive insertion movement of the spring element 96 in the direction of the heating block 8, ie 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, 12th 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 As the introduction progresses, 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 can already sufficient overlap between the guide pins and the corresponding recesses are achieved, so that the two housing parts 4, 6 can be moved relative to each other 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 elastically bent inwards so far that, as the insertion movement progresses, the free end of the leg 100o, which forms a further inclined sliding surface 100c 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 has reached its end position when the two housing parts 4, 6 abut each other with their respective surfaces facing each other.
  • 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 brought into its installation position by closing the lower housing part and the upper housing part when closing the housing, in which the spring element is at the height of the heating block, i. is arranged in the plane 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 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)
  • Air-Conditioning For Vehicles (AREA)
  • Resistance Heating (AREA)
EP07014117.1A 2007-07-18 2007-07-18 Dispositif de chauffage électrique Ceased EP2017547B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07014117.1A EP2017547B1 (fr) 2007-07-18 2007-07-18 Dispositif de chauffage électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07014117.1A EP2017547B1 (fr) 2007-07-18 2007-07-18 Dispositif de chauffage électrique

Publications (2)

Publication Number Publication Date
EP2017547A1 true EP2017547A1 (fr) 2009-01-21
EP2017547B1 EP2017547B1 (fr) 2013-10-02

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EP07014117.1A Ceased EP2017547B1 (fr) 2007-07-18 2007-07-18 Dispositif de chauffage électrique

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EP (1) EP2017547B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3543049A1 (fr) * 2018-03-19 2019-09-25 Mahle International GmbH Dispositif de chauffage à résistance ctp
EP3530502A4 (fr) * 2016-12-13 2019-11-13 Japan Climate Systems Corporation Dispositif de chauffage électrique dans climatiseur pour véhicule et son procédé de fabrication

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1432287A1 (fr) 2002-12-19 2004-06-23 Catem GmbH & Co.KG Dispositif de chauffage électrique avec boítier
EP1564503A1 (fr) * 2004-02-10 2005-08-17 Catem GmbH & Co. KG Dispositif de chauffage électrique de faible hauteur
EP1652704A1 (fr) 2004-10-29 2006-05-03 Behr France Rouffach SAS Ensemble de chauffage électrique, notamment pour véhicule automobile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1432287A1 (fr) 2002-12-19 2004-06-23 Catem GmbH & Co.KG Dispositif de chauffage électrique avec boítier
EP1564503A1 (fr) * 2004-02-10 2005-08-17 Catem GmbH & Co. KG Dispositif de chauffage électrique de faible hauteur
EP1652704A1 (fr) 2004-10-29 2006-05-03 Behr France Rouffach SAS Ensemble de chauffage électrique, notamment pour véhicule automobile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3530502A4 (fr) * 2016-12-13 2019-11-13 Japan Climate Systems Corporation Dispositif de chauffage électrique dans climatiseur pour véhicule et son procédé de fabrication
EP3543049A1 (fr) * 2018-03-19 2019-09-25 Mahle International GmbH Dispositif de chauffage à résistance ctp

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