EP2019268B1 - Chauffage électrique - Google Patents

Chauffage électrique Download PDF

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Publication number
EP2019268B1
EP2019268B1 EP08000980A EP08000980A EP2019268B1 EP 2019268 B1 EP2019268 B1 EP 2019268B1 EP 08000980 A EP08000980 A EP 08000980A EP 08000980 A EP08000980 A EP 08000980A EP 2019268 B1 EP2019268 B1 EP 2019268B1
Authority
EP
European Patent Office
Prior art keywords
sheet metal
housing
spring
auxiliary heater
electrical auxiliary
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.)
Active
Application number
EP08000980A
Other languages
German (de)
English (en)
Other versions
EP2019268A3 (fr
EP2019268A2 (fr
Inventor
Franz Bohlender
Michael Niederer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eberspaecher Catem GmbH and Co KG
Original Assignee
Eberspaecher Catem GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eberspaecher Catem GmbH and Co KG filed Critical Eberspaecher Catem GmbH and Co KG
Priority to EP08000980A priority Critical patent/EP2019268B1/fr
Priority to JP2008181636A priority patent/JP4856128B2/ja
Priority to CN2008101335736A priority patent/CN101349475B/zh
Priority to KR1020080069628A priority patent/KR101028509B1/ko
Priority to US12/175,134 priority patent/US20090020619A1/en
Publication of EP2019268A2 publication Critical patent/EP2019268A2/fr
Publication of EP2019268A3 publication Critical patent/EP2019268A3/fr
Application granted granted Critical
Publication of EP2019268B1 publication Critical patent/EP2019268B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • F24H3/0435—Structures comprising heat spreading elements in the form of fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • F24H3/0441—Interfaces between the electrodes of a resistive heating element and the power supply means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • F24H3/0441—Interfaces between the electrodes of a resistive heating element and the power supply means
    • F24H3/0447—Forms of the electrode terminals, e.g. tongues or clips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • F24H3/0452—Frame constructions
    • F24H3/0464—Two-piece frames, e.g. two-shell frames, also including frames as a central body with two covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0429—For vehicles
    • F24H3/0452—Frame constructions
    • F24H3/0476—Means for putting the electric heaters in the frame under strain, e.g. with springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1863—Arrangement or mounting of electric heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1863—Arrangement or mounting of electric heating means
    • F24H9/1872—PTC

Definitions

  • the present invention relates to an electric heater with the preamble features of claim 1.
  • Such a heater is for example from the EP 0 350 528 or the EP 1 564 503 known.
  • the conductor tracks for energizing the PTC heating elements are formed by metal strips, of which selected sheet metal strips are led out laterally from the housing, which is usually formed as a flat, provided substantially with the thickness of the layer structure frame. These over the peripheral edge of the frame laterally led out sheet metal bands form there contact tongues for connecting the electric heater to the power supply. This connection can also take place with the interposition of a plugged onto the contact tongues control or regulation element.
  • the EP 1 130 337 A2 discloses another electric heater, with the pre-characterizing features of claim 1, for use in motor vehicles.
  • This electric heater includes PTC heaters that heat-expose heat-dissipating elements housed in a package in a housing.
  • the PTC heaters are energized by printed conductors, which rest on both sides of the PTC heaters.
  • contact elements are provided on the outside of the electric heater. These contact elements are formed at one end in such a way that mutually three pins are formed so that conductor tracks are received for electrical connection between the pins.
  • the present invention is based on the problem to provide an electric heater that meets the above-mentioned, partially conflicting requirements for economic production on the one hand and a good and reliable plug connection to the electric heater on the other hand.
  • the electric heater according to the invention differs from the generic state of the art in that the contact tongues are formed by stamped sheet metal pieces that are electrically selected Interconnects are connected.
  • the housing projecting contact tongues of a separate component, namely each formed a stamped sheet metal piece, which with the conductor tracks in the rule is electrically connected within the housing.
  • different material thicknesses for the conductor tracks on the one hand and the stamped sheet metal piece can be selected on the other hand to allow the simplest possible plugging a mating connector to the reeds without having to use too thick metal strips or the like as traces for the energization of the PTC heating elements.
  • the stamped piece of sheet metal and the selected track can in principle be connected to each other by various techniques. So it is possible to connect both components by welding or soldering. Also, an adhesive connection is conceivable.
  • the sheet metal piece and the conductor track which is particularly preferably formed in the form of a sheet-metal strip, provided parallel to each other and have a overlapping length portion at which the stamped sheet metal piece is parallel to the associated conductor track and rests against this.
  • the overlapping length section should be chosen so that a secure contact of the adjacent components is achieved.
  • the sheet metal piece at least one, preferably a plurality of projections, which are particularly preferably formed by means of stamping on the sheet metal piece.
  • Corresponding projections can alternatively also be provided exclusively on the metal strip forming the conductor track. Equally well corresponding projections can be provided both on the sheet metal strip and the piece of sheet metal. The projections serve for the specific electrical contacting of the two components in the overlapping length range. On these projections alone, an electrical contact between sheet metal strip and contact tongue should be done. This ensures that the current is introduced from the contact tongue in the conductor in a defined manner.
  • the spring element establishes a frictional connection of the two components, preferably, provided that these overlapping longitudinal sections have, by pressing the two components against each other.
  • the spring element can also be used to hold the sheet metal piece to the housing. This holder can be done directly by interaction of the spring element with the housing or housing parts. The spring element, for example, clamp the sheet metal piece with the interposition of corresponding walls of the housing and thus set against the housing.
  • the spring element can also be provided in a housing designed specifically for receiving the spring element, which is referred to below as a spring receptacle and which is designed such that it holds the spring element with little play.
  • the spring receptacle accordingly forms stops, against which the spring abuts in the event of a possible relative movement of the contact tongue inserted into the housing in order to limit this relative movement.
  • the housing comprises a housing lower part, which is substantially cup-shaped and the layer structure at least partially circumferentially sums, so that the layer structure can be positioned in a predetermined manner by inserting into the housing base.
  • the lower housing part is formed so that this in cooperation with the contours of the spring element in the installed position thereof substantially prevents mobility in the longitudinal direction of the layers of the layer structure.
  • the aforementioned spring receptacle is formed by the lower housing part.
  • the spring element is formed in the form of a spring clip whose opposite spring legs clamp in the installed position of the spring element between the conductor track and the piece of sheet metal.
  • a respective spring clip is provided for each contact tongue, the spring force alone cause the mutual concern of conductor track and piece of sheet metal.
  • the conductor track and the piece of sheet metal clamping spring clip is proposed according to a further preferred embodiment of the present invention that on both sides of the sheet piece and / or the conductor projections are formed and that at least one of the spring legs between two projections on the sheet metal piece or the conductor is present.
  • the projections which may preferably be provided in opposite parallel rows, accordingly form elevations between them a contact surface of the spring leg on the sheet metal piece or the conductor track and prevent the spring clip from slipping in a direction substantially perpendicular to the longitudinal extension of the conductor track.
  • the spring clip preferably forms mutually opposite convexly curved projections which abut against the piece of sheet metal or on the conductor track and with a certain distance pass through the projections provided on the piece of sheet metal and / or the conductor track.
  • the spring legs should rest with their convex curved projections securely between the opposite, preferably formed by punching projections on the sheet metal piece or the conductor track.
  • the lower housing part forms the spring seat, in such a way that it opens in Einlegecardi the elements of the layer structure.
  • the overlapping length section is also located in this preferred embodiment, the overlapping length section.
  • this overlapping longitudinal section is essentially limited to the extension of the spring receiver.
  • the spring retainers For positioning of the selected conductor track or the piece of sheet metal before the finished assembly of all components of the electric heater, in particular before attaching the spring clip, it is preferable to provide the spring retainers with slots opening in the longitudinal direction of the layers of the layer structure, for receiving the sheet metal piece and / or the conductor track are shaped appropriately.
  • the slots are preferably dimensioned so that the conductor track, but in particular the sheet metal piece is aligned parallel to the planes of the layer structure. Accordingly, a pushed in the insertion direction over the conductor track and the piece of sheet metal spring clip grip both parts safely and create under bias against each other.
  • the spring clip has for this purpose at its front region preferably a slightly funnel-shaped and formed by the two spring leg insertion hole.
  • the maximum penetration depth of the sheet metal piece into the housing by the embodiment at least one of the slots limited.
  • the slot provided between the spring receptacle and the layer structure forms a stop for the piece of sheet metal, which prevents it from penetrating deeper in the direction of the layer structure, so that even when the contact tongues are subjected to an impact, they are not displaced into the housing and there Cause short circuit.
  • the sheet metal piece forms at its, the housing superior end of a slip-on.
  • This is characterized in that it has functional surfaces which are specially adapted to contact surfaces of a plug-in element to be attached to the contact tongues.
  • the corresponding functional surface differs in particular from the design and especially the dimension of the sheet metal piece in the region of the overlapping longitudinal section.
  • the sheet metal piece is held by means of positive engagement in the longitudinal direction of the layers of the layer structure on the housing.
  • an opening groove is preferably provided on a side surface of the sheet metal piece, between the Aufsteckabêt and the overlapping longitudinal portion of the sheet metal piece. In this groove engages a formed by the housing projection, which holds the piece of sheet metal with little or almost no play.
  • the overlapping longitudinal portion of the conductor preferably ends in front of the groove, d. h., The track does not extend beyond the groove to the outside.
  • the protrusion engaging in the groove is part of an edge which circumferentially surrounds the housing, d. h., The projection is provided substantially on the outer surface of the housing, it is ensured that the conductor track is completely received within the housing and only the sheet metal piece projects beyond the housing.
  • the spring receptacles to form a plurality of contact tongues so that they project beyond an edge of the housing base.
  • This edge is an edge which is usually parallel to the upper or lower side of the housing through which the air flows and against which the lid-shaped upper housing part rests when the cover is closed.
  • said edge is bounded on the outside by the circumferential in the circumferential direction of the housing edge of the housing.
  • the circumferentially circumferential edge of the housing extends substantially perpendicular to the edge, which is surmounted by the spring receivers. In this embodiment, therefore, the spring retainers project in the direction of the upper housing part.
  • 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 and 6 are positively connected to each other and take in a heating block, 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 14 At one end face of the housing 2, this is surmounted by five contact tongues 14 arranged one above the other in the transverse direction.
  • the contact tongues 14 pass through recesses 15 which are recessed on the housing 2 and each receive a contact tongue 14 for themselves and are predominantly formed by the housing lower part 4, but are rounded off at one end by the housing upper part 6.
  • the housing 2 has two opposite frame openings 16, 18, 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 to recognize and with Reference 18 is indicated.
  • 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 the opposite longitudinal beams of the lower housing part 4 and the upper housing part 6 connect together.
  • 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 removed housing upper part 6.
  • the heat-emitting elements 12 are only incomplete 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 special configuration, the central heat generating elements 10 do not fit in the outer positions for heat generating elements 10 of the heating block 8. In the way can not arrange the outer heat-generating elements in the middle of the heating block 8, 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 grips this PTC heating element 30 circumferentially and thus defines it.
  • sheet metal strips 34, 36 On both sides of the respective PTC heating elements 30, which are arranged side by side in a plane, are 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 30 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 in the embodiment shown in one piece by way of injection molding initially as perpendicular to the main extension direction of the position frame 28th outgoing projections formed.
  • 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.
  • 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 40 fix only 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. This is in any case effected in the embodiment discussed in the present invention by a spring element which is inserted into the housing 2 and sets the entire layer structure consisting of heat-generating elements 10 and heat-emitting elements 12 under tension.
  • 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 spring element 46 with 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. Based on these Differences it is possible to avoid a swapping of the positions for the heat generating elements 10.3 and 10.2 within the housing 2.
  • the embodiment allows that due to the design of spring mounts 48, the two middle heat-generating elements 10.2 and 10.3 can be interchanged. A corresponding interchangeability is also given for the two outer heat-generating elements 10.1 and 10.4.
  • slits 15 go from the outside of the housing 2 and terminate in the opposite to the slots 15 each widened spring receptacles 48. Behind this spring receptacle 48 in turn a narrowed slot 50 is formed, which is a contact tongue 14 formed by punching sheet metal piece 120 and the free end 44 of the associated sheet metal strip 34 receives.
  • the Fig. 8 illustrates the connection between a heat-emitting element 10 with the Bleck choir 120.
  • a spring element 46 is provided, the opposite spring legs 47 clamp the sheet metal piece 120 and the free end 44 of the sheet metal strip 34 between them.
  • the free end of the sheet metal strip 34 and the sheet metal piece 120 each have a covering length portion 122 in which the two elements 120, 44 lie parallel to each other and to each other.
  • projections 124 are formed in the overlapping length region 122 by punching on the sheet metal piece 120, via which only the electrical contact between the free end 44 and the sheet metal piece 120 takes place.
  • the planar region of the sheet metal piece 120 in the overlapping longitudinal portion 122 is then provided at a distance from the free end 44 of the sheet metal strip 34 extending parallel thereto.
  • the sheet metal piece 120 has two parallel extending rows of projections 124. By punching, these projections 124 are formed on both sides of the sheet metal piece 120 so that the sheet metal piece 120 can be placed in any orientation parallel to the sheet metal strip 34 at the free end 44, without the desired defined electrical contact between the two elements 34, 120 is lost. Between the overlapping length portion 122 and a Aufsteckabêt 140, which is formed by the front end of the sheet metal piece 120 which projects beyond the housing 2, laterally opposite grooves 126 are recessed.
  • the sheet metal piece 120 ends conically to facilitate the attachment of a female plug, not shown, on the contact tongue 14.
  • the overlapping longitudinal portion 122 has a greater width than the Aufsteckabêt 140. This greater width is initially behind the groove 126, so that a defined stop 142 is formed by the sheet metal piece 142 for the plug element.
  • spring element 46 in the form of a spring clip has the two already mentioned spring legs 47, which are connected to each other via a web 134.
  • the spring legs 47 have curved projections 130 which form opposing convexly curved abutment surfaces 132.
  • the spring element 46 cooperates with the free end 44 of the sheet metal strip 34 and the sheet metal piece 120 in an installed position.
  • the spring element 46 in the in Fig. 8 Position shown spent and in the direction of introduction of the layer structure in the in Fig. 9 shown housing lower part 4 advanced. This introduction direction extends parallel to the predetermined by the layers of the layer structure levels.
  • an insertion opening 144 with a large opening cross section receives the two parts 134, 120 in itself.
  • the convex abutment surfaces 132 slide, on the one hand, against the sheet metal piece 120 and, on the other hand, at the free end 44 of the sheet metal strip 34, widening the spring element 46.
  • the convex abutment surfaces 132 eventually pass the first row of the projections 124 and spring between the two rows of projections 124.
  • the end of this insertion movement is in any case achieved when the inner surface of the web 134 abuts against the end face of the sheet metal piece 122 and the sheet metal strip 34.
  • the assembly described above is carried out after the layer structure consisting of heat-generating elements 10 and heat-emitting elements 12 has been introduced into the lower housing part 4 (see. Fig. 9 ). Thereafter, the free ends of selected metal bands 34, which serve to make contact with the heating block 8 in the housing 2, are exposed within the spring receptacles 48. In this case, the free ends 44 pass through the slot 50, but ends in front of the slot 15. In the insertion direction of the layer structure, the sheet metal pieces 120 are introduced into the respective slots 15, in such a way that formed on the peripheral edge of the housing base projection 128 in the Groove 126 engages. This position is in Fig. 9 shown.
  • Sheet metal piece 120 extends in the longitudinal direction, that is, in the extension direction of the layers of the layer structure into the rear slot 50 and passes through the front slot 15, as the FIG. 3 can be seen. Thereafter, the spring element 46 is inserted from above into the spring receptacle 48. In particular Fig. 3 can be seen, the lower housing part 4 is formed such that the spring element 46 is fixed with little play in the spring seat 48.
  • the upper housing part 6 at the level of the slots 15 has a recess 136 which can receive the free end of a spring seat 48.
  • This concrete embodiment of the upper housing part 6 is due to the fact that the spring receptacle 48 projects beyond an edge surrounding the layer structure, the bsp. the inner surface 63 of the longitudinal beams contains.
  • the recess 36 of the upper housing part 6 is continued by a tapered recess 138, which does not extend to the frame opening 16 of the upper housing part 6, however.
  • the upright plate piece 120 fits with its front side.
  • the closed end of the tapered recess 138 forms a stop for the piece of sheet metal 120th
  • the electrical contact between the sheet metal piece 120 and the sheet metal strip 34 is carried out solely by the clamping force of the spring element 46.
  • This is formed from a spring steel and causes a compressive stress of between 1000 and 1500N / mm 2 between the sheet metal piece 120 and the sheet metal strip 34.
  • the spring element 46 is relaxed, the smallest distance of the convex abutment surfaces 132 is at most 40% of the cumulative thickness of the sheet metal piece 120 and sheet metal strip 34.
  • the sheet metal piece 120 is formed of a good electrically conductive material, eg. a copper-tin alloy. At least the Aufsteckabêt 140, preferably the entire sheet metal piece 120 are in any case provided at their opposite side surfaces with a silver coating to effect the best possible contact on the one hand between the sheet metal piece 120 and the sheet metal strip 34 and on the other hand between the contact tongue 14 and the plugged connector element.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)

Claims (17)

  1. Chauffage auxiliaire électrique de chauffage d'air, en particulier chauffage auxiliaire pour véhicule automobile, présentant une construction en couches (10, 12) qui comporte un élément de production de chaleur (10) avec au moins un élément chauffant PTC (30) et, de part et d'autre de l'au moins un élément chauffant PTC (30), des pistes conductrices adjacentes (34, 36) pour alimenter l'au moins un élément chauffant PTC (30) et au moins un élément dispensateur de chaleur (12) connecté par conduction de chaleur à l'élément de production de chaleur (10), et avec un boîtier (2) comprenant la construction en couches (10, 12) ainsi que des languettes de contact (14) pour connecter le chauffage auxiliaire à une source de courant,
    dans lequel les languettes de contact (14) sont constituées par des éléments en tôle estampée (120) qui sont connectés électriquement à des pistes conductrices sélectionnées (34),
    caractérisé
    en ce que des pistes conductrices sélectionnées (34) sont connectées avec les languettes de contact (14) via des éléments de ressort (46).
  2. Chauffage auxiliaire électrique selon la revendication 1, caractérisé en ce que les pistes conductrices sélectionnées (34) sont toutes constituées de bandes de tôle (34) et en ce que les éléments en tôle estampée (120) et les bandes de tôle (34) présentent une section longitudinale à recouvrement (122) dans laquelle l'élément en tôle estampée (120) est adjacent à la bande de tôle associée (34).
  3. Chauffage auxiliaire électrique selon la revendication 2, caractérisé en ce que sur l'élément de tôle (120) et/ou sur la piste conductrice (34) est pourvue, dans la section longitudinale à recouvrement (122), au moins une projection (124) réalisant uniquement le contact électrique entre la piste conductrice (34) et la languette de contact (14).
  4. Chauffage auxiliaire électrique selon la revendication 1, caractérisé en ce que les éléments de ressort (46) maintiennent les éléments de tôle (120) sur le boîtier (2).
  5. Chauffage auxiliaire électrique selon la revendication 1 ou 4, caractérisé en ce que le boîtier (2) comporte des logements de ressort (48) dans lesquels les éléments de ressort (46) sont maintenus avec un jeu réduit.
  6. Chauffage auxiliaire électrique selon l'une des revendications 1, 4 ou 5, caractérisé en ce que le boîtier (2) comporte une partie inférieure du boîtier (4) entourant au moins en partie la construction en couches (10, 12) et une partie supérieure de boîtier (6) qui peut être connectée à la partie inférieure du boîtier (4), et
    en ce que la partie inférieure du boîtier (4) et l'élément de ressort (46) sont constitués de telle sorte qu'une position d'installation de l'élément de ressort (46) est essentiellement prédéterminée en direction longitudinale des pistes conductrices (34, 36) par l'interaction de la partie inférieure du boîtier (4) avec l'élément de ressort (46).
  7. Chauffage auxiliaire électrique selon l'une des revendications précédentes, caractérisé en ce que l'élément de ressort (46) est constitué sous forme d'une agrafe à ressort (46) dont les branches opposées (47) serrent entre elles la piste conductrice (34) et l'élément de tôle (120) dans une position d'installation.
  8. Chauffage auxiliaire électrique selon la revendication 7, caractérisé en ce que des projections (124) sont constituées des deux côtés de l'élément de tôle (120) et/ou de la piste conductrice (34) et en ce qu'au moins une des pattes à ressort (47) est positionnée entre au moins deux projections (124) de manière adjacente à l'élément de tôle (120) ou à la piste conductrice (34).
  9. Chauffage auxiliaire électrique selon l'une des revendications précédentes et dépendant dans l'ensemble des revendications 2, 5 et 6, caractérisé en ce que la partie inférieure du boîtier (4) constitue le logement de ressort (48) qui s'ouvre en direction d'installation des couches de la construction en couches (10, 12) et se trouve dans la section longitudinale à recouvrement (122).
  10. Chauffage auxiliaire électrique selon l'une des revendications précédentes et dépendant dans l'ensemble de la revendication 5, caractérisé en ce que les logements de ressort (48) comportent des fentes (15, 50) qui s'ouvrent en direction longitudinale des couches de la construction en couches (10, 12) et qui sont conformées pour loger l'élément de tôle (120) et/ou la piste conductrice (34).
  11. Chauffage auxiliaire électrique selon la revendication 9, caractérisé en ce que la profondeur de pénétration maximale de l'élément de tôle (120) dans le boîtier (2) est limitée par la configuration d'au moins une des fentes (15, 50).
  12. Chauffage auxiliaire électrique selon l'une des revendications précédentes, caractérisé en ce que l'élément de tôle (120) constitue, à son extrémité faisant saillie du boîtier (2), une section d'insertion (140) qui comporte, sur une surface de fiche d'un élément d'insertion, une surface fonctionnelle (142) spécialement adaptée.
  13. Chauffage auxiliaire électrique selon l'une des revendications précédentes et dépendant dans l'ensemble de la revendication 2, caractérisé en ce que l'élément de tôle (120) comporte au moins une rainure s'ouvrant latéralement (126) entre une section d'insertion (140) pour insérer l'élément d'insertion et sa section longitudinale à recouvrement (122), dans laquelle s'engage une projection (128) constituée par le boîtier (2) .
  14. Chauffage auxiliaire électrique selon la revendication 3, caractérisé en ce que la section longitudinale à recouvrement (122) de la piste conductrice (34) se termine avant la rainure (126).
  15. Chauffage auxiliaire électrique selon la revendication 13 ou 14, caractérisé en ce que la projection (128) est constituée comme une partie d'un bord circonférentiel en direction du périmètre du boîtier (2).
  16. Chauffage auxiliaire électrique selon l'une des revendications précédentes et dépendant dans l'ensemble de la revendication 5, caractérisé en ce que les logements de ressort (48) dépassent vers plusieurs languettes de contact (14) d'un bord de la partie inférieure du boîtier (4) qui limite le bord circonférentiel du boîtier (2) en direction du périmètre du boîtier (2).
  17. Chauffage auxiliaire électrique selon l'une des revendications précédentes et dépendant dans l'ensemble de la revendication 5, caractérisé en ce que le côté supérieur de la construction en couches (10, 12) se termine essentiellement à même hauteur que l'extrémité libre des logements de ressort (48).
EP08000980A 2007-07-18 2008-01-18 Chauffage électrique Active EP2019268B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP08000980A EP2019268B1 (fr) 2007-07-18 2008-01-18 Chauffage électrique
JP2008181636A JP4856128B2 (ja) 2007-07-18 2008-07-11 電気補助ヒータ
CN2008101335736A CN101349475B (zh) 2007-07-18 2008-07-17 电辅助加热器
KR1020080069628A KR101028509B1 (ko) 2007-07-18 2008-07-17 전기 보조 히터
US12/175,134 US20090020619A1 (en) 2007-07-18 2008-07-17 Electrical Auxiliary Heater

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07014115A EP2017545B1 (fr) 2007-07-18 2007-07-18 Dispositif de chauffage électrique
EP08000980A EP2019268B1 (fr) 2007-07-18 2008-01-18 Chauffage électrique

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EP2019268A2 EP2019268A2 (fr) 2009-01-28
EP2019268A3 EP2019268A3 (fr) 2010-07-07
EP2019268B1 true EP2019268B1 (fr) 2012-12-26

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US (2) US8680435B2 (fr)
EP (3) EP2017545B1 (fr)
JP (2) JP4856128B2 (fr)
KR (2) KR100970043B1 (fr)
CN (2) CN101349476B (fr)
ES (1) ES2382138T3 (fr)

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JP2009051494A (ja) 2009-03-12
EP2017545B1 (fr) 2012-04-25
US8680435B2 (en) 2014-03-25
CN101349475B (zh) 2011-07-27
EP2019268A3 (fr) 2010-07-07
JP2009035247A (ja) 2009-02-19
EP2017549A1 (fr) 2009-01-21
JP4856128B2 (ja) 2012-01-18
CN101349476A (zh) 2009-01-21
KR20090009131A (ko) 2009-01-22
JP4856127B2 (ja) 2012-01-18
EP2017549B1 (fr) 2012-05-02
KR101028509B1 (ko) 2011-04-11
KR100970043B1 (ko) 2010-07-16
KR20090009130A (ko) 2009-01-22
EP2017545A1 (fr) 2009-01-21
US20090026189A1 (en) 2009-01-29
US20090020619A1 (en) 2009-01-22
CN101349475A (zh) 2009-01-21
EP2019268A2 (fr) 2009-01-28
ES2382138T3 (es) 2012-06-05
CN101349476B (zh) 2010-06-02

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