EP2017546B1 - Verfahren zum Herstellen einer elektrischen Heizvorrichtung sowie elektrischer Heizvorrichtungen - Google Patents

Verfahren zum Herstellen einer elektrischen Heizvorrichtung sowie elektrischer Heizvorrichtungen Download PDF

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Publication number
EP2017546B1
EP2017546B1 EP07014116.3A EP07014116A EP2017546B1 EP 2017546 B1 EP2017546 B1 EP 2017546B1 EP 07014116 A EP07014116 A EP 07014116A EP 2017546 B1 EP2017546 B1 EP 2017546B1
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.)
Active
Application number
EP07014116.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2017546A1 (de
Inventor
Franz Bohlender
Michael Niederer
Michael Zeyen
Rainer Wünstel
Detlef Stephan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eberspaecher Catem GmbH and Co KG
Original Assignee
Eberspaecher Catem GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eberspaecher Catem GmbH and Co KG filed Critical Eberspaecher Catem GmbH and Co KG
Priority to EP07014116.3A priority Critical patent/EP2017546B1/de
Priority to JP2008181637A priority patent/JP4880648B2/ja
Priority to US12/174,375 priority patent/US8319158B2/en
Priority to KR1020080069635A priority patent/KR100970032B1/ko
Priority to CN2008101316434A priority patent/CN101374376B/zh
Publication of EP2017546A1 publication Critical patent/EP2017546A1/de
Application granted granted Critical
Publication of EP2017546B1 publication Critical patent/EP2017546B1/de
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
    • F24H9/1872—PTC
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making

Definitions

  • the present invention relates to a method for producing an electric heating device, which is used in particular as a heater in a motor vehicle for heating air.
  • the electric heater has a housing in which a heating block is held under biasing force of at least one in its installed position located approximately at the height of the heating block spring element.
  • the housing further forms opposite housing openings, between which the heating block is exposed.
  • Such a heater for air conditioning the interior of a motor vehicle is for example from the EP 1 564 503 known.
  • the elements forming the heating block are introduced into a housing part.
  • the spring element is introduced into the housing part.
  • the closing of the housing takes place by applying a further housing part to the first housing part.
  • the spring element is biased, by displacers, which are integrally formed on the other housing part and which put the spring element under tension.
  • These displacement elements form an inclined surface, on which the spring element slides past with its free upper leg and in this case is pivoted in the direction of the heating block about a bearing within the first housing part and finally biased to produce a clamping force.
  • the DE 10 2004 057 530 discloses a heater with a fan heater housing which eliminates an interior space for mounting an electric heater.
  • the electric heater is supported shock-damped in the housing via a spring element. As the thus far held electric heater is constructed, this state of the art does not indicate.
  • the heating block of the generic electric heating device usually comprises a plurality of parallel layers of heat-emitting and heat-generating elements.
  • the heat-generating elements of the heating block usually comprise a plurality of one above the other in a plane provided PTC heating elements, which are arranged between conductor tracks, which are usually formed by metal strips. These tracks are energized with different polarity.
  • the PTC elements can be glued to these tracks. It is also possible to apply the printed conductors under prestress against the PTC heating elements. In any case, make sure that for disengagement generated by the PTC heating elements Heat and for the coupling of electricity is a good contact between the tracks and the PTC heating elements.
  • One or more heat-generating elements may be provided as part of the heating block.
  • the heat generated by the heat-generating elements is transmitted via heat-emitting elements to the medium to be heated, i. the air is released. 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.
  • the heat-emitting elements are usually formed of meandering bent metal strips that form corrugated fins. These corrugated ribs rest on one or both sides of heat-emitting elements.
  • the heating block comprises a plurality of layers of heat-emitting and heat-generating elements, wherein care must also be taken with regard to the heat extraction that the heat-emitting elements abut well on the heat-generating elements.
  • the heat-emitting elements can be firmly connected to the heat-generating elements and / or applied by at least one received in the housing spring element under bias.
  • the heat-emitting element can also be formed by an extruded aluminum profile which forms webs which extend substantially perpendicular to the layers of the layer structure comprising the heat-emitting and the heat-generating elements.
  • the trace i. the generally planar contact surface for the PTC heating element are formed by the outer surface of such an extruded aluminum profile.
  • the contact surface for the PTC heating elements are designed to be electrically conductive and electrically connected to the housing usually held in isolation from each other held contacts. In the former case, the contacts are usually formed by the exposed ends of the metal strips.
  • the layered heating block of parallel heat-emitting and heat-generating elements, optionally with the addition of one or more parallel thereto extending spring elements is preferably held in a housing having a U-shaped cross-section.
  • the frame When loading the layer structure with a spring, the frame should be dimensioned so that the spring force can hold permanently even at the elevated temperatures.
  • the insulating frame is nowadays produced not least for economic reasons as an injection molded part.
  • Usual housing today consist of a housing base and an upper housing part.
  • the lower housing part forms a receptacle for the individual elements of the heating block and, if necessary, the spring element. In this lower housing part, the individual elements of the heating block are arranged.
  • the heating block is enclosed by joining the upper housing part and the lower housing part in the housing.
  • edges surrounding the frame openings may partially cover the heating block, so that the heating block is enclosed between the frame openings and held in the housing.
  • the two housing parts are then connected to each other, for example via a latching connection.
  • the housing itself should be as simple as possible.
  • an electric heating device of the generic type in which the layers of the heating block, including a spring element, are initially inserted in a lower housing part in a stress-free manner.
  • An upper housing part connectable therewith forms a bevelled sliding surface, which engages over the outside of the upper part of the spring element, which protrudes from the lower housing part, with respect to the heating block.
  • the spring element When joining the upper housing part and the lower housing part, the spring element is accordingly urged in the direction of the heating block and applies under bias to this.
  • the present invention is based on the problem to provide a method for producing an electric heater, which allows easier installation of the elements of the electric heater. Furthermore, the present invention wants to specify an electric heating device for carrying out the method, which can be produced simpler and thus more cost-effectively.
  • the present invention proposes a method having the features of claim 1.
  • This method differs from the generic state of the art in that when the housing is closed to include the heating block, the spring element is brought into a plane containing the heating block and prestressed. Accordingly, the spring element is initially not in its installed position. Rather, the spring element is closed when the housing is closed, i. taken in a relative movement of the two housing parts to each other and spent in its installed position. In this insertion movement, a tension of the spring element to generate the necessary biasing force. Accordingly, the spring element can initially be brought into a provisional position, in which the spring element projects over the heating block and / or the one housing part in whole or in part. Only through cooperation with the other housing part to include the heating block, the spring element is moved into the installed position and placed under pretension.
  • the spring element is first introduced into the housing such that a longitudinal section of the spring element projects beyond the plane occupied by the heating block.
  • this initial position is preferably a portion of the spring element already at the height of the heating block and thus in a position corresponding to the position of the individual mutually parallel heat-emitting and heat generating elements.
  • the position of the spring element within the housing is then substantially predetermined, at least within a plane which extends transversely to the joining direction of the two housing parts.
  • the length of the heating block projecting length section is not in the preferred embodiment of the present invention by an external tool, but urged by the other housing part in the installed position and the other housing part acts against the corresponding length portion and pushes the spring element during the joining movement in its installed position.
  • the housing parts are guided when closing the housing to each other.
  • guide elements of the two housing parts are brought into engagement before a spring element in the installed position urging force is generated.
  • the clamping force of the spring is usually generated, which is effective only when the spring is brought into the plane of the heating block.
  • this procedure allows the positioning of the length section on the further housing part in a predetermined manner, which favors the defined introduction of the spring element into the housing.
  • the spring element when introduced into the housing, but before this spring element sets the heating block under bias and generates a corresponding force, at a the housing parts guided by a housing element which cooperates at least in line with a flat segment of the spring element.
  • This flat segment usually extends parallel to the direction of insertion.
  • the corresponding guide surface of the housing part extends parallel to the insertion direction and abuts against the segment of the spring element.
  • the spring element and the movement path of the spring element when introduced into the housing part are, however, designed so that in an expanding spring force, the spring element is urged toward the heating block and away from the housing member, at least so far that the spring element unhindered by a possible and To avoid interaction between the segment and the first of this leading housing element can be elastically deformed.
  • the spring element is finally guided through the outside of the heating block, against which the spring element acts.
  • At least one spring leg of the spring element when inserted into the housing by one of the housing parts is biased.
  • a progressive Einbringterrorism but set by another of the housing parts under pretension. This creates the possibility of initially biasing the spring element by the first-acting housing part a piece and to produce the final spring force to pressurize the heater block in total by the other housing part.
  • movement paths of the housing parts during joining and the spring element when introduced into the housing part as well as dimensions of the housing parts can be adjusted accordingly.
  • the initially acting housing part can be made relatively thin-walled and less rigid, since this only needs to be able to generate a slight spring force.
  • the housing parts are positively connected with each other after the spring element has been brought into its installed position. This creates the possibility to add the housing parts only linear and at the same time at the end of the joining movement to effect a connection of the housing parts.
  • the preferred development therefore permits, in particular, easy assembly of the electric heating device.
  • the spring element has at least one spring leg, which forms an inclined sliding surface for an element of the housing parts and which is set during the closing of the housing by joining the housing parts by a support surface of the housing parts under bias, which extends parallel to the joining direction of the housing parts ,
  • Such a configuration is particularly preferred with regard to a simple injection molding production of the housing parts, in which the functional, contour and boundary surfaces of the housing part, including those functional surfaces that form the support surface for the spring or the elements, exclusively parallel or perpendicular to the division plane of the injection mold extend.
  • Such injection molding tools ie the surfaces forming the mold cavity of the injection molding tool, can be turned away from complicated injection molding tools with a spark-eroded mold surface-forming surface by milling alone. For example, with a face milling cutter and thus produce cost-effectively and without special manufacturing know-how.
  • a spring element is understood to mean, in particular, a spring element which presses the individual layers of the heating block against one another in such a way that these layers of the heating block, which are usually not badly connected to one another, are heat-conducting as well as electrically conductive.
  • the latter criterion is therefore significant, since electric heaters of the generic type in a motor vehicle are usually operated at an operating voltage of 12 V, so that at the desired heat outputs of several 100, if not even a few 1000 W considerable currents at the phase boundaries of individual Layers flow, which only lead to no Versch poderscheinitchitch if there is no increased contact resistance at the phase boundary of non-fixed parts.
  • the at least one spring element has to be taken care of.
  • this involves a reliable transmission of electrical current at the phase boundary between two sheet-metal strips and a PTC heating element arranged therebetween.
  • the spring must apply a spring force in the range of 500 N to 1000 N, for example over a length of 200 mm. Although higher spring forces are conceivable, they are generally not required in view of the desired heat extraction and current injection.
  • an electric heating device is proposed, is specified by special design of individual heat-generating elements by molding individual fitting elements with matching mating element receivers on the side of the housing assignment of individual heat-generating elements to specific positions within the heating block. Accordingly, the individual heat-generating elements of the heating block can not be installed anywhere in the housing. While the position or the positions of certain heat-generating elements is predetermined with corresponding fitting elements within the housing, the heat-emitting elements, for example, each be identically formed, preferably as a meandering bent metal strip identical extent transverse to the layers of the layer structure.
  • fitting element in the context of the present invention, in particular parts of the heat-generating elements are considered, which serve no other function than the positioning and / or mounting of these elements in the housing.
  • Such otherwise functionless mating elements are formed, for example, position elements that the PTC heating elements hold at a predetermined location within the heat generating element, especially by n position frame of an insulating material, which form side by side provided recordings for each at least one PTC heating element.
  • the fitting elements are in this case formed in particular by the ends of the corresponding position frames.
  • one end or both ends of the positioning frames can have a specially shaped head, which can be introduced into a receptacle formed on the housing in a corresponding manner.
  • a positioning frame may have identical fitting elements at its respective tip ends.
  • each heat-generating element has matching elements, which differ from the fitting elements of all other heat-generating elements.
  • fitting element receptacles are formed on the housing, so that a specific heat-generating element can be installed in the housing only at a predetermined location within the housing.
  • the strip conductors forming sheet metal strips may be formed as fitting elements.
  • the heat-generating elements comprise metal strips on which the PTC heating elements are electrically conductive and which are brought out of the plane of the associated heat-generating element by bending and are passed through slots. which are recessed at the end of the housing, and that the arcuate metal bands of different heat-generating elements and the associated slots are formed so that the heat-generating elements can not be used anywhere in the housing.
  • the ends of selected metal strips which are located in the heating block at the top and bottom of the respective position frame and abut the arranged in the respective position frame PTC heating elements, one or both sides bent at the front end of the heating block, so that the metal strips leave the plane which is taken within the heating block by the corresponding heat-generating element.
  • the metal strips therefore extend at the end of the heating block usually perpendicular to the layers of the heating block, but after a certain length, ie an offset in this transverse direction bent back into its original orientation and passed through a slot which is recessed at the end of the housing, that is, usually extends substantially parallel to the layers of the layer structure.
  • the housing comprises a housing lower part, which forms a receptacle for the heating block and a frame surrounding the receptacle and the fitting element receptacles, and an upper housing part, which is connected to the inclusion of the heating block with the housing lower part.
  • the fitting element receptacles are in this case designed so that the fitting elements can be inserted into the housing lower part in a direction transverse to the plane in which the heating block extends.
  • the individual layers of the heating block are accordingly inserted into the one-sided housing lower part in the direction of the frame opening formed by this housing lower part until it reaches the bottom of the recording.
  • the fitting elements of the individual heat-generating elements can be widened in the manner of a hammer head, but be relatively short.
  • Other fitting elements may be web-shaped elongated and narrow. It can be provided elongated wide webs, which project beyond the heat generating elements end.
  • the fitting elements can be formed in a plan view of the still open housing lower part round, elliptical, H or U-shaped.
  • the previously discussed possible cross-sectional shapes are usually integrally formed on the positioning frame and usually connected to a thin web, which connects the fitting elements to the heating block.
  • the upper housing part has guide pins which protrude from a heating block enclosing cover of the housing upper part, are integrally formed therewith and in corresponding thereto recessed on the lower housing part pin guides are engaged , wherein the guide pins and the pin guides are formed corresponding to the two housing parts, that the two housing parts are connectable only in a certain orientation with each other.
  • the cover may be formed in the manner of a non-specific lid, it is preferable to form the housing upper part specifically and in a specific arrangement with regard to an exact arrangement of parts of the heating block or the spring device Form arrangement for the inclusion of the heating block and for adapting the cover to the shape of the elements of the heating block and a unique is to be attached to the housing lower part.
  • the recording and the pin guides forming functional surfaces and the outer contour predetermining contour surfaces of the housing base and the guide pin forming functional surfaces and the cover limiting boundary surfaces of the housing base exclusively form that they extend parallel or perpendicular to the plane surrounding the frame opening.
  • This embodiment has the advantage that an injection molding tool for the production of lower housing and upper housing by means of injection molding of thermoplastics has no undercuts and due to the orthogonal orientation of the functional, contour and boundary surfaces of the housing parts mold surfaces, ie the injection mold in total by means of a Endmill can be easily made. Turning away from complicated injection molds with a spark-eroded, the mold cavity forming mold cavity surface, accordingly, the injection mold for producing the housing of the heater according to the invention can be inexpensively and without special know-how create.
  • those surfaces of the housing parts are considered, which limit the receptacle for the heating block, allow the joining of the housing parts and lead the required relative movement of the housing parts.
  • those surfaces of the housing parts are considered, which define the outer contour of the housing parts and the housing as a whole. Relatively narrow end faces or edge surfaces on which two flat surfaces abut against one another at right angles do not count as corresponding functional, contour and boundary surfaces in the sense of the invention. These faces and edge surfaces may be rounded or chamfered.
  • the housing is usually formed in this preferred embodiment as a rectangular member which surrounds a substantially also substantially rectangular receptacle for the heating block and on its two outer sides in each case also defines a likewise substantially rectangular housing opening.
  • the spring element forms a flat bearing surface on which the heating block rests with its outside.
  • This embodiment has the advantage that in the formation of the heat-emitting elements in the form of meandering curved corrugated ribs, the spring element can simultaneously form the contact surface for the arcuate ends of the corrugated fin.
  • the spring element can replace a known from the prior art sheet metal strip, which optionally serves to energize the heating block, but otherwise can form only a flat contact surface for the adjacent corrugated fin element. Accordingly, with this preferred development, it is possible to reduce the number of components required to construct the electrical heating device.
  • the training offers the advantage that the flat bearing surface forms a sliding surface for the heating block, which can be an unobstructed sliding movement between the heating block and the spring element during insertion of the latter element in the installed position.
  • the spring element has a sheet metal strip which extends substantially over the entire length of the heating block. At this metal strip are provided to simplify the production of the spring element by punching and bending integrally formed on the sheet metal spring leg. In the longitudinal direction of the sheet metal strip, several spring legs are provided one behind the other. The metal strip and the individual, the spring biasing effect causing spring legs are accordingly formed as a unitary component.
  • each spring leg forms an inclined sliding surface.
  • the spring legs can be biased when closing the housing by joining the housing parts by a support surface which is associated with a single housing element.
  • the spring legs arranged one above the other can also interact through elements of different housing parts. The latter alternative offers the possibility, with the inclined sliding surface cooperating element of a particular housing part less rigid and thus make the housing part easier overall.
  • spring legs these are placed upon closing of the housing by joining the housing parts preferably by a support surface of the housing elements under bias, which extends parallel to the relative movement during joining.
  • the spring forces can be better controlled, which in not yet completely closed housing in the same by the at least one spring element can be generated.
  • These spring forces can be re-stored by the guide elements, which guide the guiding movement of the housing parts. As such, to a lesser extent, there is a likelihood that force-acting portions of the spring force that are not strictly parallel to the location of the heater block will force the heater block or portions thereof out of the housing.
  • a plurality of spring legs are provided one behind the other in the longitudinal direction of the spring element.
  • the heating block is accordingly biased by a plurality of parallel to the layers arranged spring legs, so that the total acting spring force is evenly distributed.
  • the spring elements can be specifically provided where PTC heating elements are provided within the heating block in order to effect, in particular at these points, a high contact pressure between the sheet metal strips feeding the PTC heating elements and the PTC heating elements.
  • These spring legs are connected to each other via substantially flat segments of a metal strip, which also forms the spring legs formed by punching and bending. Adjacent spring leg and the flat segments thus form a single component. The flat segments are not only the connection of adjacent spring legs.
  • At least one of the housing parts forms for this purpose spacers which project beyond the support surfaces and form a contact surface for the flat segments. These can first be routed via the spacers.
  • the design of the spring with only one side of the sheet metal strip provided spring legs and provided on the opposite side bearing surface for the adjacent element of the heating block in conjunction with the formation of Abstandshaltem on the housing to the fact that the spring element only in the correct orientation with respect to the heating block can be installed, ie can only be installed if the flat contact surface is adjacent to the heating block.
  • the design of the spring element with multiple flat segments i. Segments of a normal metal strip with arranged therebetween and the plane of the flat segments unilaterally projecting spring legs also offers the possibility to wrap the sheet material after punching and bending the spring legs on a coil and deliver in this way or stockpile. Accordingly, the preferred spring element of the heating device according to the invention can be removed from the band as an endless product and cut to length, which makes the adaptation of the spring to the desired spring force or length relatively easy.
  • 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 gives the representation 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, each of which is accommodated in the housing lower part 4 in an isolating manner and with a certain mobility transverse to the layers of the layer structure (heating block 8).
  • the lower housing part 4 has for this purpose fitting element receptacles 22 which open a receptacle 24, which is formed essentially by the housing lower part 4 and accommodates the heating block 8.
  • fitting element receptacles 22a, 22b are provided in the exemplary embodiment shown (cf. Fig. 3 ).
  • the heat-generating elements 10 have at their front ends fitting elements 26a, 26b which respectively fit only in the corresponding corresponding fitting element receptacle 22a or 22b.
  • the corresponding fitting element receptacles 22 are matched to the fitting elements 26 provided corresponding thereto, that the heat-generating elements 10 are movable by a few tenths of a millimeter transversely to the longitudinal extent of the layers of the heating block 8 in the housing 2.
  • the outer fitting elements 26a are designed as a hammer head and engage in correspondingly formed fitting element receptacles 22a.
  • the fitting elements 26b associated with these elongated fitting element receptacles 22b are rod-shaped and less wide than the hammer-head-like fitting elements 26a. Due to this particular configuration, the central heat-generating elements 10 do not fit in the outer positions for heat-generating elements 10 of the heating block. In 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 to see and explained in more detail below with reference to these figures becomes.
  • the positioning frame 28 is made of an insulating material and serves for the positioning of PTC heating elements 30.
  • a receptacle 32 is recessed in the positioning frame 28, which peripherally grips and thus fixes this PTC heating element.
  • sheet metal strips 34, 36 which form electrical conductors for energizing the PTC heating elements 30 and via which the heat generated by the PTC heating elements to the heat-emitting elements 12 is passed by heat transfer. These are directly on the Blechbändem 34, 36 at.
  • the front ends of the positioning frames 28 are extended beyond a fitting element web 38 beyond the position of the metal bands 34, 36.
  • 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 Blechbändem 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 produced in this way by injection molding is then provided with the essential parts of the heat-generating element 10, ie the PTC heating elements 30 are inserted into the corresponding receptacle 32 and surrounded on both sides by the Blechbändem 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.
  • heating by heat conduction is the heating effecting agent preferably formed by a tool which simultaneously performs the transformation of the retaining webs 40.
  • the holding webs 40 are not continuous in the longitudinal direction of the heat-generating element 10, but are provided in sections 40.1 to 40.5. These sections 40.1 to 40.5 leave between them a passage 41 free, which is designed such that in each case a strut 22 in the width direction between the sections 40.1; 40.2; 40.3; 40.4 or 40.5 fits.
  • the section formed by the passage 41 in any case, projects inwards in relation to the outer surface of the retaining webs 40 to such an extent that at least half the thickness of the struts 22 fits between the retaining webs 40 and is accommodated there.
  • the struts 22 and the positioning frame 28 may also be referred to as the first strut, and the retaining webs 40, which may be referred to as the second strut 43.
  • the heat-generating element 10 is formed as a preassembled component and can thus be handled during assembly, without the risk that the conductor tracks 34, 36 or even the inserted in the position frame 28 PTC heating elements 30 are lost. It should be noted, however, that usually the holding webs only fix the metal strips 34, 36 in the position frame, but not with a contact force against the PTC heating elements 30 put, which is sufficient to energize the PTC heating elements 30 during operation safe. This is in any case effected in the embodiment discussed in the context of the present invention by a spring element, which will be described below with reference to the Fig. 8 to 10 will be explained in more detail.
  • Fig. 3 and 6 are a metal strip, namely in Fig. 6 shown sheet metal strip 34, bent out of the plane of the heat generating element 10. Accordingly, an offset 42 results between the plane in which the sheet metal strip 34 abuts against the PTC heating elements 30, and a free end 44, which by repeated, but opposite bending parallel to the former Main section of the sheet metal strip 34 extends. Again Fig. 3 can be seen, this free end 44 is mechanically and electrically connected by a crimp 46 to the associated contact tongue 14.
  • upper heat-emitting elements have an outgoing from the upper sheet metal strip 34 offset 42.3 and 42.4.
  • the lower heat generating element 10.1 has a downwardly outgoing offset 42.1.
  • the metal strips 34, 36 of the heat generating element 10 marked with reference numeral 10.2 are on both sides to form an offset 42.20 or 42.21 arc and each provided with a contact tongue 14. Due to these differences, it is possible to avoid exchanging the positions for the heat-generating elements 10.3 and 10.2 within the housing 2.
  • the embodiment allows that the two middle heat-generating elements 10.2 and 10.3 can be interchanged with one another due to the design of contact tongue receivers 48. A corresponding interchangeability is also given for the two outer heat-generating elements 10.1 and 10.4.
  • the lower housing part 4 can be molded in an injection mold that can be produced cost-effectively, since all areas significant for the housing 4 extend parallel or at right angles to the frame opening 18 of the housing lower part 4.
  • the lower housing part 4 initially substantially mutually perpendicular frame surfaces 52a-d, which surround the heating block 8 circumferentially and perpendicular to the plane containing the frame opening 18 includes.
  • the corresponding frame surface 52b opens outwardly 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 base 4, which the reed 48 and the lead here Slots 15 and 50 form substantially and those walls that 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.
  • relatively small pin guides 72 are formed on the end of the longitudinal beams 64, 66 extending from the inner surface of the longitudinal beams 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 end 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 housing upper 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 with a corresponding thereto recessed on the lower housing part 4 further guide recess 94 cooperates, but does not fit into the fitting element receptacles 22 or the contact tongue receptacles 48, so that it is ensured that the upper housing part 6 is placed in a predetermined and unambiguous manner on the lower housing part 4 and joined with this.
  • the walls surrounding the further pin guide 94 and forming the guide pin 92 also extend at right angles to the plane lying on the frame opening 16 or 18.
  • the Fig. 8 shows a perspective side view of a spring element 96, which rests against the edge of the heating block 8 and is in its installed position at the height of the heating block 8.
  • front side of the spring element 96 forms a flat contact surface 98, at which the adjacent, in Fig. 3 uppermost heat-emitting element rests with its lamellae. More precisely, the ends, which are bent over at the ends, lie more meandering lamellae of the corrugated ribbed strip 12 against this contact surface 98.
  • the abutment surface 98 is formed by a first flat sheet metal strip on which both sides transverse outgoing leg spring 100 have been formed by punching, which are initially within the plane of the contact surface 98 and after punching by bending in the as in the Fig. 8 . 10 . 11 and 12 recognizable shape have been brought.
  • Two spring legs 100o, 100u lie in the width direction, ie transversely to the longitudinal extent of the planar contact surface 98 and thus in the insertion direction of the spring element 96 during assembly above the other.
  • Each individual spring limb 100o, 100u forms an inclined sliding surface 102a, 102b, 102c, which in each case enclose an angle of between 35 and 55 °, preferably of approximately 45 °, between itself and the planar contact surface.
  • Between the longitudinal direction of the spring element 96 successively provided pairs of spring legs 100 are flat segments 104, in which the spring element 96 is formed as a rectangular flat sheet metal strip.
  • spring element 96 has pairs of spring legs 100o, 100u corresponding to the number of spaces between the individual spacers 62 on the longitudinal spar 64 (vgi. Fig. 4 ). Each pair of spring legs 100o, 100u is in the installed position of the spring element 96 between these Abstandshaltem 62.
  • the flat segment 104 bridges the width of the spacers 62 and connects adjacent pairs of spring leg 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 provided between adjacent spacers 62 42c accordingly form a support surface 106 for the respective pairs of spring legs 100.
  • the spring element 96 Due to the vote of the spring element 100, especially the configuration of the flat segments 104 between the pairs of superposed spring legs 100, it is not possible to introduce the spring element 96 in the wrong orientation in the lower housing part 4.
  • the spring element 96 can only be moved into its installed position, in which the spring element is accommodated at the level of the heating block 8 in the housing 2, when the flat contact surface 98 is aligned with the heating block.
  • the heating block is held by the spacers 62 at a distance from the support surfaces 106, so that the spring element 96 can be applied to these surfaces at any time and without interference from the heating block 8 when inserted into the housing base 4.
  • the spring element 96 With a progressive insertion movement of the spring element 96 in the direction of the heating block 8, 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 63 formed by the longitudinal beams 64, 66, approximately the same length as the spacers 62, the inner surface 63 of the longitudinal beams 64, 66 dominates.
  • 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, sufficient overlap between the guide pins 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 thereby already elastically bent inwards so far that, as the insertion movement progresses, the free end of the leg 100o, which in the center curves around the spring element 96, which forms a further inclined sliding surface 100c, can reliably pass the edge 108.
  • a progressive joining movement between the two housing parts 4, 6 also leads to the entrainment of the spring element 96.
  • the spring element 96 has reached its end position when the two housing parts 4, 6 abut each other with their respective surfaces facing each other.
  • the spring element 96 is clamped and held in this installation position due to the spring tension between the heating block 8 and the frame surface 52c. If the spring element 96 is displaced by an unintentional force from the outside, in each case the stop 58 or the bottom 112 of the housing upper part 6 prevents the spring element 96 from being forced out of the housing 2.
  • the spring element is spent in closing the housing by joining the lower housing part and upper housing part in its installed position in which the spring element is at the height of the heating block; that is arranged in the plane that is also occupied by the heating block. Furthermore, the spring element is set only during insertion under spring bias, and only then when the two housing parts 4, 6 by positive engagement of the guide pin 76 to 80 are guided 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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  • 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)
EP07014116.3A 2007-07-18 2007-07-18 Verfahren zum Herstellen einer elektrischen Heizvorrichtung sowie elektrischer Heizvorrichtungen Active EP2017546B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP07014116.3A EP2017546B1 (de) 2007-07-18 2007-07-18 Verfahren zum Herstellen einer elektrischen Heizvorrichtung sowie elektrischer Heizvorrichtungen
JP2008181637A JP4880648B2 (ja) 2007-07-18 2008-07-11 電気加熱装置およびその製造方法
US12/174,375 US8319158B2 (en) 2007-07-18 2008-07-16 Electric heating radiator device
KR1020080069635A KR100970032B1 (ko) 2007-07-18 2008-07-17 전기 가열 장치를 제조하는 방법
CN2008101316434A CN101374376B (zh) 2007-07-18 2008-07-18 制造电加热装置的方法以及电加热装置

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EP07014116.3A EP2017546B1 (de) 2007-07-18 2007-07-18 Verfahren zum Herstellen einer elektrischen Heizvorrichtung sowie elektrischer Heizvorrichtungen

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KR100445723B1 (ko) * 2003-11-18 2004-08-26 우리산업 주식회사 Ｐｔｃ 소자 모듈 및 이를 포함하는 차량용 프리히터
EP1564503B1 (de) 2004-02-10 2007-12-26 Catem GmbH & Co. KG Elektrische Heizvorrichtung für niedrige Bauhöhen
PT1580495E (pt) * 2004-03-22 2011-12-15 Halla Climate Control Corp Aquecedor eléctrico
FR2868737B1 (fr) * 2004-04-13 2008-08-08 Valeo Climatisation Sa Ensemble de chauffage pour installation de chauffage, de ventilation et/ou d'air climatise d'un habitacle de vehicule
DE102004057530A1 (de) 2004-11-29 2006-06-01 Stego-Holding Gmbh Heizlüfter
ES2360885T3 (es) * 2005-09-23 2011-06-10 EBERSPÄCHER CATEM GMBH & CO. KG Elemento generador de calor de un dispositivo de calefacción.
ES2303712T3 (es) * 2005-09-23 2008-08-16 CATEM GMBH & CO. KG Elemento generador de calor para un dispositivo de calefaccion.
EP1790916B1 (de) * 2005-11-23 2014-05-21 Eberspächer catem GmbH & Co. KG Elektrische Heizvorrichtung mit Toleranz-PTC-Heizelement
EP2053902A1 (en) * 2007-10-26 2009-04-29 Calsonic Kansei Corporation Electrical heating apparatus, method of manufacturing heat generator unit and pressing jig for use in manufacturing thereof

Also Published As

Publication number Publication date
JP2009040401A (ja) 2009-02-26
JP4880648B2 (ja) 2012-02-22
US20090026191A1 (en) 2009-01-29
CN101374376B (zh) 2012-05-30
KR100970032B1 (ko) 2010-07-16
EP2017546A1 (de) 2009-01-21
US8319158B2 (en) 2012-11-27
CN101374376A (zh) 2009-02-25
KR20090009133A (ko) 2009-01-22

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