EP2017549B1 - Electric heating device - Google Patents
Electric heating device Download PDFInfo
- 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.)
- Expired - Fee Related
Links
- 238000005485 electric heating Methods 0.000 title description 5
- 238000010438 heat treatment Methods 0.000 claims description 123
- 239000002184 metal Substances 0.000 claims description 33
- 125000006850 spacer group Chemical group 0.000 claims description 14
- 238000005452 bending Methods 0.000 claims description 4
- 210000002105 tongue Anatomy 0.000 description 11
- 238000003780 insertion Methods 0.000 description 9
- 230000037431 insertion Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000036316 preload Effects 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 230000000750 progressive effect Effects 0.000 description 4
- 238000004080 punching Methods 0.000 description 3
- 244000273256 Phragmites communis Species 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 239000000109 continuous material Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
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.
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- Direct Air Heating By Heater Or Combustion Gas (AREA)
Description
Die vorliegende Erfindung betrifft eine elektrische Heizvorrichtung, welche insbesondere als Zuheizer in einem Kraftfahrzeug zur Erwärmung von Luft zum Einsatz kommt, mit einem Heizblock, welcher in einem gegenüberliegende Rahmenöffnung ausbildenden Gehäuse gehalten ist und parallele Lagen von wärmeabgebenden und wärmeerzeugenden Elementen umfasst. Die vorliegende Erfindung betrifft eine elektrische Heizvorrichtung mit den oberbegrifflichen Merkmalen von Anspruch 1.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
Ein solcher Zuheizer zur Klimatisierung des Innenraums eines Kraftfahrzeuges ist beispielsweise aus der
Es können ein oder mehrere wärmeerzeugende Elemente als Teil des Heizblocks vorgesehen sein. Die von den wärmeerzeugenden Elementen erzeugte Wärme wird über wärmeabgebende Elemente an das zu erwärmende Medium, d.h. die Luft abgegeben. Diese durchströmt das Gehäuse durch die beiden Rahmenöffnungen, die zwischen sich den ebenen Heizblock aufnehmen. Die Rahmenöffnungen liegen dabei üblicherweise parallel zueinander an gegenüberliegenden Seiten eines im Wesentlichen flachen, rahmenförmigen Gehäuses. Im Hinblick auf eine möglichst kostengünstige Herstellung der elektrischen Heizvorrichtung werden die wärmeabgebenden Elemente in der Regel aus mäandrierend gebogenen Blechstreifen gebildet, die Wellrippen ausbilden. Diese Wellrippen liegen ein- oder beidseitig an wärmeabgebenden Elementen an. Dementsprechend umfasst der Heizblock mehrere Lage von wärmeabgebenden und wärmeerzeugenden Elementen, wobei auch im Hinblick auf die Wärmeauskopplung darauf zu achten ist, dass die wärmeabgebenden Elemente gut an den wärmeerzeugenden Elementen anliegen. Auch hierzu können die wärmeabgebenden Elemente mit den wärmeerzeugenden Elementen fest verbunden und/oder durch wenigstens ein in dem Gehäuse aufgenommenes Federelement unter Vorspannung angelegt werden.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. This flows through the housing through the two frame openings, which receive the flat heating block between them. The frame openings are usually parallel to each other on opposite sides of a substantially flat, frame-shaped housing. With a view to the most cost-effective production of the electric heater, 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. Accordingly, 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. Also for this purpose, 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.
Für die Funktionsfähigkeit der elektrischen Heizvorrichtung ist es bedeutsam, dass das Federelement dauerhaft seine elastische Vorspannung beibehält. Anderenfalls können sich erhöhte Widerstände an dem Phasengrenzen stromführender Bauteile des Heizblocks ergeben.For the operability of the electric heater, it is important that the spring element permanently maintains its elastic bias. Otherwise, increased resistances may result at the phase boundaries of live components of the heating block.
Die vorliegende Erfindung will eine elektrische Heizvorrichtung angeben, welche leicht hergestellt werden und dauerhaft und zuverlässig ihre Funktion ausüben kann.The present invention seeks to provide an electric heater which is easy to manufacture and can perform its function permanently and reliably.
Zur Lösung dieses Problems wird mit der vorliegenden Erfindung eine elektrische Heizvorrichtung mit den Merkmalen von Anspruch 1 angegeben. Diese unterscheidet sich dadurch von dem gattungsbildenden Stand der Technik, dass das Federelement Passelemente aufweist und dass diesen Passelementen zugeordnete Passgegenelemente an dem Gehäuse und/oder dem Heizblock vorgesehen sind, wobei die Passelemente und die Passgegenelemente so ausgebildet und aufeinander abgestimmt sind, dass es nicht möglich ist, das Federelement in falscher Ausrichtung in das Gehäuse einzubringen.To solve this problem, the present invention provides an electric heating device having the features of
Die Passgegenelemente können beispielsweise durch einzelne Lagen des Heizblocks ausgebildet sein, um eine eindeutige Zuordnung des Federelementes innerhalb des Heizblocks zu ermöglichen. Alternativ oder ergänzend können die Passgegenelemente auch durch das Gehäuse ausgeformt sein. Dabei bietet es sich an, das Federelement an dem Rand des Heizblocks vorzusehen und die Passgegenelemente im Bereich einer Anlagefläche auszubilden, die an wenigstens einer den Heizblock und das Federelement umfänglich umgebenden Wandung des Gehäuses vorgesehen ist. Selbstverständlich kann das Federelement auch Passelemente aufweisen, die den Heizblock stirnseitig überragen und in Passelementaufnahmen des Gehäuses aufgenommen sind, wobei die endseitig vorgesehenen Passelemente und die zugeordneten Passelementaufnahmen lediglich die Funktion zukommt eine eindeutige Montage und Halterung des Federelements innerhalb des Gehäuses zu ermöglichen. Dabei kommt es nicht darauf an, dass das Federelement randseitig an dem Heizblock vorgesehen ist. Entsprechende Federelemente können mittig oder an beliebiger anderer Stelle in den Heizblock eingebaut sein.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. Alternatively or additionally, 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. Of course, 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.
Im Hinblick auf eine möglichst kompakte Ausgestaltung weist das Federelement vorzugsweise in Richtung der Lagen des Heizblocks eine Konturierung auf, die die Passelemente ausformt und denen Passgegenelemente entsprechen, die an dem Gehäuse vorgesehen sind. Bei dieser bevorzugten Ausgestaltung können die Lagen des Heizblocks mit Rücksicht auf eine Zuordnung der Teile des Heizblocks und des Federelementes in dem Gehäuse unspezifisch ausgestaltet sein. Insbesondere können identische wärmeabgebende oder wärmeerzeugende Elemente als Teil des Heizblocks verwendet werden, was sich insbesondere bei der wirtschaftlichen Herstellung von elektrischen Heizvorrichtungen mit einer Vielzahl von übereinander gestapelten Lagen anbietet. Die örtliche Zuordnung des Federelementes innerhalb des Gehäuses wird indes durch eine an dem Gehäuse ausgebildete Gegenkontur vorgegeben.With regard to the most compact possible configuration, 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. In this preferred embodiment, 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. In particular, 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.
Mit der Weiterbildung nach Anspruch 3 wird eine Ausgestaltung geschaffen, die sich leicht montieren lässt, da das jeweilige Federelement als einteiliges Bauteil ausgeformt ist, welches sich über die gesamte Länge des Heizblocks erstreckt. Durch die mit Abstand zueinander vorgesehenen Federschenkel wird eine Konturierung gebildet, die eine eindeutige Positionierung des Federelementes in dem Gehäuse ermöglicht, sofern zu dieser Konturierung eine entsprechende Gegenkonturierung an den Gehäusen und/oder den Lagen des Heizblocks verwirklicht ist.With the development according to claim 3, an embodiment is provided 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. By means of spaced apart spring legs contouring is formed, which allows an unambiguous positioning of the spring element in the housing, if this contouring a corresponding Gegenkonturierung on the housings and / or the layers of the heating block is realized.
Aus den zuvor bereits genannten Gründen bildet indes vorzugsweise das Gehäuse Federschenkelaufnahmen aus, die so auf die Anordnung der Federschenkel abgestimmt sind, dass das Federelement lediglich bei in den Federschenkelaufnahmen aufgenommenen Federschenkeln zusammen mit dem Heizblock in das Gehäuse passt. Bei dieser Ausgestaltung können an einer Längsseite des Gehäuses, d.h. in Erstreckungsrichtung der Lagen des Heizblocks identisch ausgebildete Federschenkelaufnahmen verwirklicht sein. Diese Ausgestaltung stellt sicher, dass die Federschenkel jeweils in Bezug auf den Heizblock nach außen ausgerichtet sind. Das Federelement selbst kann von einem Endlosmaterial abgeschnitten sein, d.h. benachbarte Federschenkel können jeweils identische Abstände aufweisen.For the reasons already mentioned, however, 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. In this embodiment, 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.
Sofern eine konkrete Zuordnung der Lage des Federelementes in Längsrichtung des Heizblocks, d.h. in Erstreckungsrichtung der einzelnen Lagen gewünscht ist, können die Abstände benachbarter Federschenkel und damit die Breite der dazwischen vorgesehenen Freiräume variieren. Korrespondierend zu dieser ungleichmäßigen Konturierung des Federelementes in Längsrichtung ist bei dieser bevorzugten Ausgestaltung auf Seiten des Gehäuses eine entsprechende Gegenkontur vorgesehen, so dass das Federelement einerseits lediglich mit seinen Federschenkeln auf der dem Heizblock abgewandten Außenseite in das Gehäuse eingebaut werden kann, und andererseits bestimmte Federschenkel an bestimmten Positionen innerhalb des Gehäuses zugeordnet sind. Hierdurch kann ein spezifisches Verspannungsprofil, des Heizblocks in Längsrichtung desselben erreicht werden, d.h. eine durch unterschiedliche Federschenkel in Längsrichtung variierende und in dem Heizblock wirkende Federkraft eingestellt werden.If a specific assignment of the position of the spring element in the longitudinal direction of the heating block, that is desired in the extension direction of the individual layers, the distances between adjacent spring legs and thus the width of the free spaces provided therebetween may vary. Corresponding to this non-uniform contouring of the spring element in the longitudinal direction is provided in this preferred embodiment on the side of the housing, a corresponding mating contour, 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. As a result, a specific bracing profile of the heating block in the longitudinal direction thereof can be achieved, ie one be adjusted by different spring legs in the longitudinal direction and acting in the heating block spring force.
Weitere bevorzugte Weiterbildungen der erfindungsgemäßen Heizvorrichtung sind in den Ansprüchen 5 bis 8 angegeben.Further preferred developments of the heating device according to the invention are specified in claims 5 to 8.
Weitere Einzelheiten und Vorteile der vorliegenden Erfindung ergeben sich aus der folgenden Beschreibung eines Ausführungsbeispiels in Verbindung mit der Zeichnungen. In dieser zeigen:
- Fig. 1
- eine perspektivische Seitenansicht eines Ausführungsbeispiels der elektrischen Heizvorrichtung;
- Fig. 2
- eine Seitenansicht auf ein Gehäuseunterteil mit darin eingebautem Heizblock des in
Fig. 1 gezeigten Ausführungsbeispiels; - Fig. 3
- einen vergrößerten Ausschnitt der Darstellung gemäß
Fig. 2 ; - Fig. 4
- eine perspektivische Seitenansicht des in den
Fig. 1 bis 3 gezeigten Ausfüh-rungsbeispiels; - Fig. 5
- eine perspektivische Seitenansicht des Gehäuseoberteils der elektrischen Heiz-vorrichtung nach
Fig. 1 ; - Fig. 6
- eine perspektivische Explosionsdarstellung eines wärmeerzeugenden Elementes der elektrischen Heizvorrichtung nach
Fig. 1 ; - Fig. 7
- eine Schnittdarstellung entlang der Linie VII-VII gemäß der Darstellung in
Fig. 6 eines montierten wärmeerzeugenden Elementes; - Fig. 8
- eine perspektivische Seitenansicht eines Federelementes zur Verspannung des Heizblocks des in den
Fig. 1 bis 7 verdeutlichten Ausführungsbeispiels; - Fig. 9
- eine Seitenansicht eines Endes des Beispiels gemäß
Fig. 1 vor dem Fügen der Gehäuseteile; - Fig. 10
- eine Schnittansicht entlang der Linie X-X gemäß der Darstellung in
Fig. 9 ; - Fig. 11
- eine vergrößerte Detailansicht des Ausschnitts A in
Fig. 10 und - Fig. 12a bis e
- vergrößerte Detailansichten ähnlich zu Ansicht gemäß
Figur 11 in verschiede-nen Stadien beim Fügen der Gehäuseteile.
- Fig. 1
- a side perspective view of an embodiment of the electric heater;
- Fig. 2
- a side view of a housing base with built-in heating block of in
Fig. 1 shown embodiment; - Fig. 3
- an enlarged section of the illustration according to
Fig. 2 ; - Fig. 4
- a side perspective view of the in the
Fig. 1 to 3 shown embodiment; - Fig. 5
- a perspective side view of the upper housing part of the electric heating device according to
Fig. 1 ; - Fig. 6
- an exploded perspective view of a heat generating element of the electric heating device according to
Fig. 1 ; - Fig. 7
- a sectional view taken along the line VII-VII as shown in FIG
Fig. 6 a mounted heat generating element; - Fig. 8
- a perspective side view of a spring element for clamping the heating block of the in the
Fig. 1 to 7 illustrated embodiment; - Fig. 9
- a side view of an end of the example according to
Fig. 1 before joining the housing parts; - Fig. 10
- a sectional view taken along line XX as shown in FIG
Fig. 9 ; - Fig. 11
- an enlarged detail view of the section A in
Fig. 10 and - Fig. 12a to e
- enlarged detail views similar to view according to
FIG. 11 in different stages when joining the housing parts.
Die
An einer Stirnseite des Gehäuses 2 wird dieses von fünf in Querrichtung übereinander angeordneten Kontaktzungen 15 überragt. Die Kontaktzungen treten durch an dem Gehäuse 2 ausgesparte Schlitze 16 hindurch, die jeweils für sich eine Kontaktzunge aufnehmen und überwiegend durch das Gehäuseunterteil 4 gebildet sind, jedoch an einer Stirnseite durch das Gehäuseoberteil 6 komplettiert sind.At one end face of the housing 2, this is surmounted by five
Das Gehäuse 2 weist zwei gegenüberliegende Rahmenöffnungen auf, von denen in
Die
Wie zu erkennen, weist das gezeigte Ausführungsbeispiel vier wärmeerzeugende Elemente 10 auf, die jeweils stirnseitig isolierend und mit gewisser Beweglichkeit quer zu den Lagen des Schichtaufbaus (Heizblocks 8) in dem Gehäuseunterteil 4 aufgenommen sind. Das Gehäuseunterteil 4 weist hierzu Passelementaufnahmen 22 auf, die sich einer Aufnahme 24, die im Wesentlichen durch das Gehäuseunterteil 4 gebildet ist und den Heizblock 8 aufnimmt, öffnen. An jeder Stirnseite des Gehäuseunterteils 4 sind bei dem gezeigten Ausführungsbeispiel zwei unterschiedliche Arten von Passelementaufnahmen 22a, 22b vorgesehen (vgl. auch
Während die wärmeerzeugenden Elementen 10 nicht an jeder beliebigen Stelle im Gehäuse 2 eingesetzt werden können, sind die wärmeabgebenden Wellrippenelemente 12 unspezifisch und als Längenabschnitte eines mäandrierend gebogenen zunächst Blechstreifens als gefertigt und von diesem Endlosmaterial auf Länge geschnitten. Jedes einzelne wärmeabgebende Element 12 kann an beliebiger Position für ein wärmeabgebendes Element innerhalb des Heizblocks 8 eingesetzt werden.While the heat-generating
Die Passelemente 26 sind einstückig an einem Positionsrahmen 28 angeformt, der in den
Die stirnseitigen Enden der Positionsrahmen 28 sind über einen Passelementsteg 38 über die Lage der Blechbänder 34, 36 hinaus verlängert. Am äußeren Ende der Passelementstege 38 befinden sich die jeweiligen Passelemente 26 des Positionsrahmens 28. Wie die Querschnittsansicht entlang der in
Das auf diese Weise mittels Spritzgießen hergestellte einteilige Bauteil wird danach mit den wesentlichen Teilen des wärmeerzeugenden Elementes 10 versehen, d.h. die PTC-Heizelemente 30 werden in die korrespondierenden Aufnahme 32 eingelegt und beidseitig von den Blechbändern 34, 36 umgeben. Danach werden die Vorsprünge plastisch nach innen verformt und so die Leiterbahnen 34, 36 übergreifend ausgebildet. Hierbei kommt üblicherweise ein Warmumformen zum Einsatz, bei dem das die Haltestege 40 bildende Material lokal im Bereich der Blechbänder 34, 36 aufwärmt und somit erweicht wird. Das jeweils zum Einsatz kommende Mittel kann beispielsweise mittels Heißluft oder durch Wärmeleitung den Positionsrahmen 28 lokal erwärmen. Im Falle der Erwärmung durch Wärmeleitung wird das die Erwärmung bewirkende Mittel vorzugsweise durch ein Werkzeug gebildet, welches gleichzeitig die Umformung der Haltestege 40 vornimmt.The one-piece component thus produced by injection molding is then provided with the essential parts of the heat-generating
Die Haltestege 40 sind in Längsrichtung des wärmeerzeugenden Elementes 10 nicht durchgängig ausgebildet, sondern sind in Abschnitten 40.1 bis 40.5 vorgesehen. Diese Abschnitte 40.1 bis 40.5 lassen zwischen sich einen Durchgang 41 frei, der derart ausgestaltet ist, dass jeweils eine Strebe 22 in Breitenrichtung zwischen die Abschnitte 40.1; 40.2; 40.3; 40.4 bzw. 40.5 passt. Der durch den Durchgang 41 gebildete Abschnitt verspringt gegenüber der Außenfläche der Haltestege 40 jedenfalls so weit nach innen, dass zumindest die halbe Dicke der Streben 22 zwischen die Haltestege 40 passt und dort aufgenommen ist.The holding
Allerdings fehlt es an einem formschlüssigen Eingriff zwischen den Streben 22 und den Positionsrahmen 28 in einer Richtung quer zu den Lagen des Heizblocks 8, so dass eine Beweglichkeit quer zu den Lagen des Heizblocks 8 gegeben ist zwischen den Streben 22 der Gehäuseteile 4, 6, die auch als erste Strebe bezeichnet werden können, und den Haltestegen 40, die als zweite Strebe 43 bezeichnet werden können.However, there is a lack of a positive engagement between the
Das wärmeerzeugende Element 10 ist als vormontiertes Bauteil ausgebildet und kann somit bei der Montage gehandhabt werden, ohne dass die Gefahr besteht, dass die Leiterbahnen 34, 36 oder gar die in den Positionsrahmen 28 eingelegten PTC-Heizelemente 30 verloren gehen. Es sei jedoch darauf hingewiesen, dass üblicherweise die Haltestege lediglich die Blechbänder 34, 36 in dem Positionsrahmen fixieren, diese aber nicht mit einer Anpresskraft gegen die PTC-Heizelemente 30 legen, welche ausreicht, die PTC-Heizelemente 30 sicher beim Betrieb zu bestromen. Dies wird jedenfalls bei der im Rahmen der vorliegenden Erfindung diskutierten Ausgestaltung durch ein Federelement bewirkt, welches nachfolgend noch unter Bezugnahme auf die
Zunächst soll aber weiter auf diejenigen Merkmale eingegangen, die dafür Sorge tragen, dass Teile des Heizblocks 8 nicht an beliebiger Stelle innerhalb des Gehäuses 2 eingebaut werden kann.First, however, will continue to discuss those features that ensure that parts of the
Wie insbesondere den
Die in
Die zuvor bereits unter Bezugnahme auf
Das Gehäuseunterteil 4 kann in einer kostengünstig herzustellenden Spritzgießform abgeformt werden, da sämtliche, für das Gehäuse 4 bedeutsame Flächen sich parallel oder rechtwinklig zu der Rahmenöffnung 18 des Gehäuseunterteils 4 erstrecken.The
So hat das Gehäuseunterteil 4 zunächst im Wesentlichen rechtwinklig zueinander verlaufende Rahmenflächen 52a-d, die den Heizblock 8 umfänglich umgeben und rechtwinklig zu der Ebene verlaufen, die die Rahmenöffnung 18 beinhaltet. An der Stirnseite, an der die Kontaktzungen 14 aus dem Gehäuseunterteil 4 herausgeführt sind, öffnet sich die korrespondierende Rahmenfläche 52b über vier Passelementstegaufnahmen 54 nach außen, deren Hauptwandungen sich gleichfalls rechtwinklig zu der Ebene erstrecken, die die Rahmenöffnung 18 enthält. Eine entsprechende Erstreckung haben diejenigen Funktionsflächen des Gehäuseunterteils 4, welche die Kontaktzungenaufnahme 48 sowie die hierhin führenden Schlitze 15 bzw. 50 im Wesentlichen ausbilden sowie diejenigen Wände, die die Passelementaufnahme 22 begrenzen und in
Parallel zu dieser Ebene verläuft die innere Oberfläche des Gehäuseunterteils 4, die stirnseitig von den stirnseitigen Enden der Wandungen gebildet wird, die die Passelementaufnahmen 22 bzw. die Kontaktzungenaufnahmen 48 ausbilden. An einer Längsseite wird dieser obere Rand durch Abstandshalter 62 gebildet, die die Rahmenfläche 52c zu der Aufnahme 24 hin überragen und auf deren Funktion bei der Beschreibung des Federelementes nachfolgend noch eingegangen wird. Unterhalb dieser oberen Ebene der inneren Oberfläche des Gehäuseunterteils 4 befinden sich inneren Oberflächen 63 der beiden Längsholme 64, 66 des Gehäuseunterteils 4, die allerdings die randseitigen Anschläge 58, 60 so weit überragen, dass der Heizblock 8 nahezu vollständig, d.h. mit mehr als 70 % seiner höhenmäßigen Erstreckung in dem Gehäuseunterteil 4 umfänglich gefasst ist. Die Längsholme 64, 66 sind von Zapfenführungen 68, 70, 72 durchsetzt, die sich rechtwinklig zu der Ebene erstrecken, die die Rahmenöffnung 18 enthält. Die Zapfenführungen 68, 70, 72 durchsetzen abschnittsweise im Wesentlichen die gesamte Längserstreckung der Längsholme 44, 66.Parallel to this plane extends the inner surface of the
In der Mitte der jeweiligen Längsholme 64, 66 befindet sich eine Zapfenführung 70, die mit relativ geringer Länge ausgebildet ist und sich zu einem Fenster 74 öffnet, welches an der Außenseite des Gehäuseunterteils 4 liegt. Benachbart zu dieser mittleren Zapfenführung 70 ist die Zapfenführung 68 vorgesehen, die sich jeweils über etwa 1/3 der Länge der Längsholme 64, 66 erstrecken. An dem äußeren Ende dieser Zapfenführungen 68 befinden sich wiederum Zapfenführungen 70 mit zugeordneten Fenstern 74, wie vorstehend beschrieben. An den stirnseitigen Enden der Längsholme 64, 66 sind wiederum relativ kleine Zapfenführungen 72 ausgebildet, die sich von der inneren Oberfläche der Längsholme 64, 66 bis zu der Außenfläche des Gehäuseunterteils erstrecken, die auch die Rahmenöffnung 18 enthält.In the middle of the respective
Die die Zapfenführungen 68, 70, 72 bildenden bzw. begrenzenden Funktionsflächen erstrecken sich sämtlich rechtwinklig zu der Ebene, die die Rahmenöffnung 18 enthält. Lediglich die stirnseitigen Ränder der entsprechenden Öffnungen 68 bis 72 sind leicht angefast bzw. abgerundet, um das Einführen von korrespondierenden Führungszapfen 76 bis 80 des Gehäuseoberteils 6 zu erleichtern. Zum leichteren Verbinden von Gehäuseunterteil 4 und Gehäuseoberteil sind des Weiteren auch die freien Enden der Wandungen angefast bzw. abgerundet, die die Abstandshalter 62 sowie die Aufnahmen 22b, 15, 50, 48 endseitig begrenzen und die oberen Enden der Abstandshalter 62 bilden.The functional surfaces forming the pin guides 68, 70, 72 all extend at right angles to the plane containing the
Das in
An einer Stirnseite des Gehäuseoberteils 6 sind an der Innenwand der Abdeckung 88 fünf Aussparungen, korrespondierend zu den fünf Kontaktzungenaufnahmen 48 ausgebildet, die einen Teil der Schlitze 15 bilden und auch einen oberen Randbereich, der Kontaktzungen 14 nach Montage des Heizblocks in dem geschlossenen Gehäuse umfassen. Auf der gegenüberliegenden Stirnseite ist ein weiterer Führungszapfen 92 vorgesehen, welcher mit einer korrespondierend hierzu an dem Gehäuseunterteil 4 ausgesparten weiteren Führungsausnehmung 94 zusammenwirkt, jedoch nicht in die Passelementaufnahmen 22 bzw. die Kontaktzungenaufnahmen 48 passt, so dass sichergestellt ist, dass das Gehäuseoberteil 6 in vorbestimmter und eindeutiger Weise auf das Gehäuseunterteil 4 aufgesetzt und mit diesem gefügt wird. Auch die die weitere Zapfenführung 94 umgebenden sowie den Führungszapfen 92 bildenden Wandungen erstrecken sich rechtwinklig zu der Ebene, die auf Rahmenöffnung 16 bzw. 18 liegt.On one end side of the
Die
Das in
Bei einer fortschreitenden Einführbewegung des Federelementes 96 in Richtung auf den Heizblock 8, d.h. bei fortschreitendem Einbringen in den Heizblock wird das Federelement 96 dann zwangsläufig aufgrund der Federkraft durch den unteren Federschenkel 100u in Richtung auf den Heizblock 8 gedrängt, so dass die Lagen 10, 12 des Heizblocks komprimiert werden. Die ebene Anlagefläche 98 weist dann bereits eine solche Überdeckung mit dem benachbarten wärmeabgebenden Element 12 auf, dass bei fortschreitender Einbringbewegung das Federelement 96 hinreichend in Einbringrichtung zwischen dem Heizblock 8 und dem Gehäuseunterteil 4 geführt wird. Bei weiter fortschreitendem Einbringen wird schließlich der untere Federschenkel 100u elastisch komprimiert. Die gehäuseseitige Gegenkraft wird hierbei durch eine obere Kante 108 gebildet, die zwischen der Stützfläche 106 und der inneren Oberfläche des Längsholmes 64 durch die Stoßstelle der beiden Flächen ausgebildet wird. Diese Kante 108 drängt beim Einbringen des Federelementes 96 zunächst den unteren Federschenkel 100u nach innen. Bei fortlaufender Einbringbewegung wird schließlich der obere Federschenkel 100o durch Zusammenwirken des nach innen abgeschrägt umbogenen freien Endes des entsprechenden Federschenkels 100o nach innen gedrängt.With a progressive insertion movement of the
Wie den
Zur Beschreibung der Montage wird im Folgenden auf die
Diese anfängliche Einbringbewegung, bei welcher das Federelement 96 im Wesentlichen keine Federvorspannung in den Heizblock 8 einbringt, wird das Federelement 96 über dem Heizblock 8 zugewandte stirnseitige Flächen der Abstandshalter 62 geführt, die mit den flachen Segmenten 104 des Federelementes 96 zusammenwirken. Aufgrund der Anlage von Federelement 96 und Abstandshaltern 62 ist das Federelement 96 mit seiner ebenen Anlagefläche 98 parallel zu den Lagen 4, 6 des Heizblocks ausgerichtet. Nach diesem ersten Montageschritt überragt das Federelement 96 die von dem Heizblock 8 eingenommene Ebene um einen Längenabschnitt, der in
Zunächst werden die Federschenkel 100o, 100u geringfügig komprimiert, bis der Boden 112 des Gehäuseoberteils 6 gegen das obere Ende des Federelementes 96 anstößt (vgl.
Kurz bevor die beiden Gehäuseteile 4, 6 aneinander liegen, werden die in den Führungskanälen unter leichter elastischer Biegung der Raststege 82 in den Zapfenführungen 70 geführten Köpfe 84 nach außen gedrängt, so dass sich deren Rastfläche 96 gegen eine Rastgegenfläche 114 anlegen bzw. diese mit leichtem Spiel überragen, so dass die beiden Gehäuseteile 4, 6 unverlierbar gegeneinander fixiert sind.Shortly before the two
Wie die obige Beschreibung verdeutlicht, wird bei der Herstellung der elektrischen Heizvorrichtung nach dem diskutierten Ausführungsbeispiel das Federelement beim Schließen des Gehäuses durch Fügen von Gehäuseunterteil und Gehäuseoberteil in seine Einbaulage verbracht, in der sich das Federelement auf Höhe des Heizblocks befindet, d.h. in derjenigen Ebene angeordnet ist, die auch von dem Heizblock eingenommen wird. Des Weiteren wird das Federelement erst beim Einbringen unter Federvorspannung gesetzt, und zwar erst dann, wenn die beiden Gehäuseteile 4, 6 durch formschlüssigen Eingriff der Führungszapfen 76 bis 80 in die korrespondierenden Zapfenführungen 68, 70, 72 relativ zueinander geführt sind. Die konstruktive Ausgestaltung bietet dementsprechend die Möglichkeit, die Bauteile des Heizblocks spannungsfrei in die durch das Gehäuse 2 gebildete Aufnahme 24 einzubringen. Erst danach erfolgt die Federverspannung, und zwar bereits bei aneinander anliegenden und in Grenzen gegeneinander positionierten Gehäuseteilen 4, 6. Sollte es danach aufgrund der erzeugten Federvorspannung beim Fügen der Federelemente 4, 6 zu einer Verschiebung der Elemente des Heizblocks 8 oder gar zu einem Herausdringen der Elemente des Heizblocks 8 aus der Aufnahme 24 kommen, werden diese Teile durch die den Heizblock 8 in dem Gehäuse 2 einschließenden Teile der Gehäuseteile 4, 6 gehalten und in die gewünschte Position beim Fügen der Gehäuseteile 4, 6 zurückgedrängt.As the above description illustrates, in the manufacture of the electric heater according to the discussed embodiment, 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
Hinsichtlich der konstruktiven Ausgestaltung ist die vorliegende Erfindung nicht auf das beschriebene Ausführungsbeispiel beschränkt. So kann beispielsweise ein Federelement vorgesehen sein, welches einen Federschenkel aufweist, der in der Einbaulage zunächst im Wesentlichen spannungsfrei ist. Dieses Federelement wird spannungsfrei zusammen mit dem Heizblock in die Aufnahme 24 eingebracht. Das Federelement weist einen Federschenkel auf, der Federschenkel bildet eine in Richtung auf den Anschlag 58 nach außen und unten schräg geneigte Gleitfläche ausbildet aus, und zwar für einen Zapfen, der mit dem Federelement zusammenwirkt und den entsprechenden Federschenkel beim Fügen von Gehäuseoberteil und Gehäuseunterteil unter Federvorspannung setzt, so dass das Federelement insgesamt gegen den Heizblock 8 unter Federvorspannung angelegt wird. Bei dieser Ausgestaltung wird das Federelement zunächst spannungsfrei zusammen mit dem Heizblock in dem Gehäuseunterteil aufgenommen und bleibt aber beim Erzeugen der Federvorspannung ortsfest relativ zu der Fügerichtung. Das Federelement wird lediglich in der Ebene des Heizblocks geringfügig verschoben und an den Heizblock angelegt. Des Weiteren wird der bzw. die Federschenkel zur Erzeugung der elastischen Vorspannung verschwenkt. Die besondere Ausgestaltung der wärmeerzeugenden Elemente 10 ermöglicht eine einfachere Montage, da die durch die ersten und zweiten Streben 20, 43 gebildete Gitteranordnung nicht vollständig Teil des Gehäuses ist, sondern die zweiten Streben mit den Positionsrahmen 28 ausgebildet werden und sich somit zuverlässig dort befindet, wo die PTC-Heizelemente 30 innerhalb des Heizblocks 8 zum Liegen kommen. Gegenüber dem vorbekannten Stand der Technik, bei dem die Gitteranordnung allein durch die Gehäuseteile ausgebildet werden, können dementsprechend Gehäuseteile hergestellt werden, die verhältnismäßig einfach ausgebildet sind. Des Weiteren kann mit höheren Toleranzen gearbeitet werden, da keine einteilig mit dem Gehäuse verbundenen Streben existieren, die sich parallel zu den Lagen des Heizblocks 8 erstrecken und exakt auf Position der wärmeerzeugenden Elemente 10 vorgesehen sein müssen. Durch die Dimensionierung der Streben 20 und des Durchgangs 41 und insbesondere das Einfügen der Streben 20 zwischen zwei Abschnitte der Haltestege 40 besteht indes die Möglichkeit, die ersten und zweiten Streben 20, 43 formschlüssig gegeneinander abzustützen und somit das Gehäuse insgesamt zu versteifen.With regard to the structural design, the present invention is not limited to the described embodiment. Thus, for example, 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
Da das wärmeabgebende Element 12 als vormontierte Baueinheit vorbereitet wird und des Weiteren durch die Passelemente 26 und die zugehörigen Aufnahmen 22 sichergestellt ist, dass die wärmeerzeugenden Elemente 12 lediglich an vorbestimmten Stellen innerhalb des Gehäuses 2 eingebaut werden können, kann die Fertigung der elektrischen Heizvorrichtung, insbesondere die Montage der Einzelteile auch durch wenig geübtes Personal erfolgen.Since the heat-emitting
Die konkrete Ausgestaltung des Ausführungsbeispiels gibt eine eindeutige Zuordnung von verschiedenen Bauteilen der elektrischen Heizvorrichtung vor. Wird diese eindeutige Zuordnung nicht eingehalten, lassen sich die Bauteile der elektrischen Heizvorrichtung nicht montieren.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.
- 22
- Gehäusecasing
- 44
- GehäuseunterteilHousing bottom
- 66
- GehäuseoberteilHousing top
- 88th
- Heizblockheating block
- 1010
- wärmeerzeugende Elementheat generating element
- 1212
- wärmeabgebendes Elementheat-emitting element
- 1414
- Kontaktzungecontact tongue
- 1515
- Schlitzslot
- 1616
- Rahmenöffnung, GehäuseoberteilFrame opening, housing top
- 1818
- Rahmenöffnung, GehäuseunterteilFrame opening, lower housing part
- 2020
- Strebe/ erste StrebeStrut / first strut
- 2222
- PasselementaufnahmePass element receptacle
- 2424
- Aufnahme für den HeizblockRecording for the heating block
- 2626
- Passelementpass element
- 2828
- Positionsrahmenposition frame
- 3030
- PTC-HeizelementPTC heating element
- 3232
- Aufnahme für PTC-HeizelementMount for PTC heating element
- 3434
- Blechbandmetal strip
- 3636
- Blechbandmetal strip
- 3838
- PasselementstegPass bridge element
- 4040
- Haltestegeretaining webs
- 40.1 bis 40.540.1 to 40.5
- Abschnitte der HaltestegeSections of the retaining bars
- 4141
- Durchgangpassage
- 4242
- Versatzoffset
- 4343
- Zweite StrebeSecond strut
- 4444
-
freies Ende des Blechbandes 34free end of the
sheet metal strip 34 - 4646
- VercrimpungselementVercrimpungselement
- 4848
- KontaktzungenaufnahmeContact tongue receiving
- 5050
- Schlitzslot
- 5252
- Rahmenflächeframe surface
- 5454
- PasselementstegaufnahmeShim web recording
- 5656
- Bodenground
- 5858
- randseitiger Anschlag Federelementedge-side stop spring element
- 6060
- randseitiger Anschlag wärmeabgebendes ElementEdge-side stop heat-emitting element
- 6262
- Abstandshalterspacer
- 6363
- Innere Oberfläche der LängsholmeInner surface of the longitudinal bars
- 6464
- Längsholmlongeron
- 6666
- Längsholmlongeron
- 6868
- Zapfenführungpin guide
- 7070
- Zapfenführungpin guide
- 7272
- Zapfenführungpin guide
- 7474
- Fensterwindow
- 7676
- Führungszapfenspigot
- 7878
- Führungszapfenspigot
- 8080
- Führungszapfenspigot
- 8282
- Raststeglatching web
- 8484
- Kopfhead
- 8686
- RastflächeRest area
- 8888
- Abdeckungcover
- 9090
- Ausbuchtungbulge
- 9292
- weiterer Führungszapfenanother guide pin
- 9494
- weitere Zapfenführungfurther pin guide
- 9696
- Federelementspring element
- 9898
- ebene Anlageflächelevel contact surface
- 100100
- Federschenkelspring leg
- 102102
- Gleitflächesliding surface
- 104104
- flaches Segmentflat segment
- 106106
- Stützflächesupport surface
- 108108
- Kanteedge
- 110110
- Kanteedge
- 112112
- Boden des GehäuseoberteilBottom of the housing top
- 113113
-
äußerer Rand des Bodens 112outer edge of the
floor 112 - 114114
- RastgegenflächeRest counter surface
- LL
- Längenabschnittlongitudinal section
Claims (8)
- Electrical heating device with a flat heating block (8), which is held under pretension of at least one spring element (96) in a housing (2) forming oppositely situated frame openings (16, 18) and comprises parallel layers of heat dissipating and heat generating elements (10, 12),
characterised in that
the spring element (96) comprises fitting elements (100, 104), to which fitting-element counter-elements (62, 106) are assigned on the housing (2) and/or the heating block, wherein the fitting elements (100, 104) and the assigned fitting-element counter-elements (62, 106) are formed and assigned to each other such that the spring element (96) cannot be inserted in an incorrect alignment in the housing (2). - Electrical heating device according to claim 1, characterised in that the fitting elements (100, 104) are formed by a contouring of the spring element (96) in direction of the layers of the heating block (8), that the spring element (96) is provided between the heating block (8) and the housing (2), and that the housing (2) has a counter-contouring (100, 104) fitting the contouring and forming the fitting-element counter-elements.
- Electrical heating device according to claim 2, characterised in that the spring element (96) comprises a sheet metal band extending essentially over the entire length of the heating block (8) and the contouring includes multiple spring legs (100) formed in one piece by blanking and bending of the sheet metal band arranged in longitudinal direction of the sheet metal band one after the other.
- Electrical heating device according to claim 3, characterised in that the housing (2) forms spring leg holding fixtures (106) and that the spring legs (100) and the spring leg holding fixtures (106) are assigned to each other such that the spring element (96) together with the heating block fits into the housing (2) only if the spring legs (100) are received in the spring leg holding fixtures (106).
- Electrical heating device according to one of the preceding claims, characterised in that the spring element (96) forms a flat contact surface (98), against which an outer face of the heating block (8) abuts.
- Electrical heating device according to claim 5, characterised in that the spring element (96) comprises a flat sheet metal band, against which one of the heat dissipating elements (12) of the heating block (8), which is formed by a corrugated rib, abuts directly.
- Electrical heating device according to one of the preceding claims, characterised in that multiple spring legs (100) are arranged one after another in longitudinal direction of the spring element (96) and are connected by essentially flat segments (104) of a sheet metal band joining these spring legs (100), and that the housing forms spacers (62) for the flat segments (104), which protrude a support surface (106) for the spring legs (100) toward the heating block (8).
- Electrical heating device according to claim 7, characterised in that the spacers (62) form a guide surface for the spring element (96) at least in an initial phase of introduction of the spring into the heating block (8).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07014721A EP2017549B1 (en) | 2007-07-18 | 2007-07-26 | Electric heating device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07014115A EP2017545B1 (en) | 2007-07-18 | 2007-07-18 | Electric heating device |
EP07014721A EP2017549B1 (en) | 2007-07-18 | 2007-07-26 | Electric heating device |
Publications (2)
Publication Number | Publication Date |
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EP2017549A1 EP2017549A1 (en) | 2009-01-21 |
EP2017549B1 true EP2017549B1 (en) | 2012-05-02 |
Family
ID=38951283
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07014115A Active EP2017545B1 (en) | 2007-07-18 | 2007-07-18 | Electric heating device |
EP07014721A Expired - Fee Related EP2017549B1 (en) | 2007-07-18 | 2007-07-26 | Electric heating device |
EP08000980A Active EP2019268B1 (en) | 2007-07-18 | 2008-01-18 | Electric heater |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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EP07014115A Active EP2017545B1 (en) | 2007-07-18 | 2007-07-18 | Electric heating device |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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EP08000980A Active EP2019268B1 (en) | 2007-07-18 | 2008-01-18 | Electric heater |
Country Status (6)
Country | Link |
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US (2) | US8680435B2 (en) |
EP (3) | EP2017545B1 (en) |
JP (2) | JP4856127B2 (en) |
KR (2) | KR100970043B1 (en) |
CN (2) | CN101349475B (en) |
ES (1) | ES2382138T3 (en) |
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-
2007
- 2007-07-18 ES ES07014115T patent/ES2382138T3/en active Active
- 2007-07-18 EP EP07014115A patent/EP2017545B1/en active Active
- 2007-07-26 EP EP07014721A patent/EP2017549B1/en not_active Expired - Fee Related
-
2008
- 2008-01-18 EP EP08000980A patent/EP2019268B1/en active Active
- 2008-07-11 JP JP2008181635A patent/JP4856127B2/en not_active Expired - Fee Related
- 2008-07-11 JP JP2008181636A patent/JP4856128B2/en not_active Expired - Fee Related
- 2008-07-16 US US12/174,396 patent/US8680435B2/en active Active
- 2008-07-17 CN CN2008101335736A patent/CN101349475B/en not_active Expired - Fee Related
- 2008-07-17 CN CN2008101335740A patent/CN101349476B/en active Active
- 2008-07-17 US US12/175,134 patent/US20090020619A1/en not_active Abandoned
- 2008-07-17 KR KR1020080069623A patent/KR100970043B1/en active IP Right Grant
- 2008-07-17 KR KR1020080069628A patent/KR101028509B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CN101349476B (en) | 2010-06-02 |
JP4856128B2 (en) | 2012-01-18 |
US8680435B2 (en) | 2014-03-25 |
EP2017545B1 (en) | 2012-04-25 |
KR101028509B1 (en) | 2011-04-11 |
KR20090009131A (en) | 2009-01-22 |
CN101349476A (en) | 2009-01-21 |
US20090026189A1 (en) | 2009-01-29 |
EP2017549A1 (en) | 2009-01-21 |
KR20090009130A (en) | 2009-01-22 |
JP2009051494A (en) | 2009-03-12 |
ES2382138T3 (en) | 2012-06-05 |
EP2019268B1 (en) | 2012-12-26 |
CN101349475B (en) | 2011-07-27 |
JP4856127B2 (en) | 2012-01-18 |
EP2017545A1 (en) | 2009-01-21 |
JP2009035247A (en) | 2009-02-19 |
EP2019268A2 (en) | 2009-01-28 |
CN101349475A (en) | 2009-01-21 |
US20090020619A1 (en) | 2009-01-22 |
KR100970043B1 (en) | 2010-07-16 |
EP2019268A3 (en) | 2010-07-07 |
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