EP1731340B1 - Electric heating device - Google Patents
Electric heating device Download PDFInfo
- Publication number
- EP1731340B1 EP1731340B1 EP20060011698 EP06011698A EP1731340B1 EP 1731340 B1 EP1731340 B1 EP 1731340B1 EP 20060011698 EP20060011698 EP 20060011698 EP 06011698 A EP06011698 A EP 06011698A EP 1731340 B1 EP1731340 B1 EP 1731340B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat
- electric heating
- elements
- heating device
- frame
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
- F24H3/0429—For vehicles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
- F24H3/0429—For vehicles
- F24H3/0435—Structures comprising heat spreading elements in the form of fins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
- F24H3/0429—For vehicles
- F24H3/0441—Interfaces between the electrodes of a resistive heating element and the power supply means
- F24H3/0447—Forms of the electrode terminals, e.g. tongues or clips
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
- F24H3/0429—For vehicles
- F24H3/0452—Frame constructions
- F24H3/0464—Two-piece frames, e.g. two-shell frames, also including frames as a central body with two covers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
- F24H3/0429—For vehicles
- F24H3/0452—Frame constructions
- F24H3/0476—Means for putting the electric heaters in the frame under strain, e.g. with springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
- F24H9/1863—Arrangement or mounting of electric heating means
- F24H9/1872—PTC
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
- H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
- H05B3/50—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material heating conductor arranged in metal tubes, the radiating surface having heat-conducting fins
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/02—Heaters using heating elements having a positive temperature coefficient
Definitions
- the present invention relates to an electric heater having a frame in which a spring-loaded layer structure of heat-emitting radiator elements and arranged therebetween heat-generating elements is provided between parallel contact strips arranged PTC heating elements.
- Such an electric heater is for example of the generic type EP 1 457 367 , as well as out DE 199 11 547 . US 5,854,471 . EP-0 350 528 or DE 197 06 199 known.
- the layer structure is held under spring bias in the frame.
- This type of mounting of the heat-generating elements and heat-emitting elements, which are also referred to as radiator elements, formed heating block has prevailed in practice.
- alternative embodiments are also known in which the individual elements of the heating block are glued and held in the frame. In the latter case, the frame substantially forms the contact surface for sealing edges of air ducts, for example in a motor vehicle, through which cold air is guided in the direction of the electric heater and the heated by the electric heater warm air is discharged.
- the frame also serves to re-load the spring force.
- This spring can - as from the US 5,854,471 known - be formed as an integral part of the heating block.
- the spring is arranged with respect to a good heat dissipation of the heat generated by the heat generating elements to the heat passed through the frame air flow adjacent to heat emitting radiator elements.
- the other possible alternative in a design of the spring as an integral part of the heating block is from the DE 199 11 547 known. It is also possible to provide the spring in the region of the frame legs ( DE 197 06 199 ), so that the space spanned by the frame interior is essentially exclusively for receiving the heating block available.
- Electric heaters of the generic type are used in particular in motor vehicles.
- electric heaters are produced for different automobiles with different electrical heating power, which in each case requires an adjustment of the frame geometry.
- the aforementioned prior art relates in each case to electrical heating devices in which the layer structure is held under spring tension in the frame, a fundamentally different from a heating arrangement, as shown in EP 1 621 378 A1 , a state of the art according to Art. 54 (3) EPC is described and in which the individual PCT elements are glued or soldered to the power supply contact plates.
- the present invention is based on the problem to provide a generic heating device that can be easily and inexpensively adapted to different heat outputs.
- the present invention proposes an electric heater having the features of claim 1. This differs from the generic state of the art by at least one placeholder included in the frame.
- the placeholder element is a thermally ineffective consideration of the heater substantially ineffective element.
- the choice of a suitable placeholder element is determined primarily by cost considerations.
- the placeholder element is neither a heat-generating element, nor does it have the radiator or heat-emitting elements suitable suitability for heat dissipation to the air.
- the placeholder element may heat up due to heat conduction in the plane of the heating block. Since the placeholder element is located in the interior of the frame and accordingly is flowed through by the air flowing through the frame, the heating of the placeholder element can also contribute to a small extent to the heat output of the electric heater.
- the placeholder element of the electric heating device according to the invention is located within the frame, ie is exposed in the interior of the frame and is flowed through by the air flowing through the frame.
- the placeholder element can be on the edge the heating block, ie be provided directly between the heat-generating and heat-emitting elements and a leg of the frame. Alternatively, the placeholder element can also be an integral part of the heating block.
- One or more placeholder elements can be provided.
- radiator elements of identical dimensions and heat generating elements of identical dimensions are usually installed in the frame, alternating radiator elements and heat-generating elements on a regular basis.
- the heat-generating elements can be replaced by one or more carrier strips whose dimensions substantially equal to the dimensions of the heat-generating elements, but do not contain PTC heating elements and their main function is to provide a flat contact surface for adjacent radiator elements (see. EP-0 350 528 ).
- the placeholder element is preferably formed so that it fits into this grid.
- the placeholder element in the width direction of the width of a radiator element or the cumulative width of a radiator element and a heat-generating element correspond.
- the overall width of the placeholder element can also be composed of the width of a radiator element and a width of a part of the heat-generating element, for example a sheet metal strip or a sheet-metal strip and the position of the PTC heating elements.
- the interior of the frame can be filled by replacing a radiator element and / or a heat-generating element and inserting a placeholder element varying with unchanged frame.
- a particularly high flexibility in the adjustment of the heating power is achieved in that both the width of the heat-generating element and another of the width of the radiator element corresponding placeholder element is available. Accordingly, the electric heater can be adapted to the desired heat output while maintaining the frame usually produced by means of plastic injection molding in the manner of a modular system.
- FIGS. 1 to 3 a first embodiment of a heating device according to the invention is shown, the structure of which in the earlier patent applications of the applicant EP-1 432 287 A1 respectively.
- EP-04 002 958 can correspond to described structure.
- the electric heating device has a planar frame 2, consisting of two plastic frame halves 4a, 4b, which are clipped together, on whose one end face a flange element 6 with an integrally formed plug housing 8 is clipped.
- the frame 2 forms at its outer edge encircling, extending parallel to the frame plane bearing surfaces 10, through which the frame 2 at the channel ends a ventilation duct, not shown, for example, a motor vehicle can be connected.
- These contact surfaces 10 serve as sealing surfaces for the opposite ends of the ventilation duct, in which the electric heating device is inserted.
- the contact surfaces 10 define an interior space 12, which dictates the maximum available space for forming a heating block 14 in the frame 2.
- the heating block 14 consists of elongated elements, namely to a heat-generating elements 16, which are formed by a plurality of in a plane one behind the other PTC heating elements 18, which are each arranged between parallel metal strips 20.
- the heating block 14 comprises heat-emitting radiator elements 22 formed from meandering bent sheet-metal strips 20.
- the heat-generating elements 16 and the radiator elements 22 are formed essentially with the same length and the same thickness (dimension at right angles to the frame plane).
- the heating block is preferably only in the width direction against the inside of the frame 2. In the present case, the heating block 14 is held in the frame under bias of a built-in frame 2 spring 24, which is described in detail in the European patent application 04 002 958 is described.
- the frame 2 has on its side surfaces on a grid structure 26 with at right angles extending longitudinal and transverse webs.
- the lattice structure 26 is designed such that the longitudinal struts are aligned with the heat-generating elements 16.
- the heat-emitting radiator elements 22 are exposed on both sides of the outer sides of the frame 2 via windows formed by the lattice structure 26.
- the heat flowing to the air flowing through the frame 2 forms a heating block, which is provided only in the bottom five rows of rows of the grid structure 26. Only there are radiator elements 22.
- the top row of the layer structure is formed by a placeholder element 28, which is provided as a separate component (see. FIG. 2 ) and which rests against the heating block 14 on one of its longitudinal sides and against the spring 24 held in the frame 2 on its other longitudinal side.
- the placeholder element 28 is presently formed by a plastic injection molded part, which has a honeycomb structure 30, which in FIG. 2 is shown in more detail.
- the honeycomb structure 30 has a longitudinal web 32 and a multiplicity of transverse webs 34, which are widened at locations provided corresponding to the transverse webs of the lattice structure 26.
- the honeycomb of the honeycomb structure 30 have air passage openings 36, which are formed continuously in the direction of air flow, so that the air flowing through the frame are also passed through the blank holder element 28 by the electric heater can.
- the dimensioning of the honeycomb structure 30 is preferably selected so that it opposes the air flow passed through the frame substantially the same air resistance, as a radiator element 22. This creates the same fluidic conditions in all parts of the air flow through the layer structure, which in view of a simple thermal design of the electric heater is preferable.
- the installation space available for receiving heat-generating elements 16 and heat-emitting radiator elements 22 is reduced by the placeholder element 28 in the transverse direction of the layer structure.
- the placeholder element 28 has a length substantially corresponding to the length of the radiator elements 22 or the heat-generating elements 16.
- the thickness of the placeholder element 28, ie the extent of the same in the direction of air flow substantially corresponds to the thickness of a radiator element 22 and a heat-generating element 16, which with its metal strip 20 in practice for forming the ends of a radiator element 22 comprehensive edges usually a little thicker than the radiator element 22 is formed.
- the placeholder element 28 is provided instead of a heat-emitting element 22 and parts of a heat-generating element 16.
- the placeholder element 28 Between the placeholder element 28 and the adjacent radiator element 22 is only a metal strip 20, which is led out to a recorded from the flange 6 circuit board side of the layer structure to form a connection element. Consequently, the placeholder element 28 has a thickness which corresponds to the cumulative thickness of a radiator element 22, a sheet metal strip 20 and the position of the PTC heating elements 18.
- the placeholder element 28 forms his respective, provided in the thickness direction longitudinal sides planar contact surfaces on which the sheet metal strip 20 and the spring 24 lie flat.
- FIGS. 4 and 5 show a second embodiment of an electric heater according to the invention, which in its basic structure that previously with reference to the FIGS. 1 to 3 has been explained.
- the same components are identified by the same reference numerals.
- FIGS. 4 and 5 shown embodiment differs essentially only from the previously discussed embodiment, that the placeholder element 28 in the middle of the layer structure, that is provided as an integral part of the heating block 14.
- the length and width of the placeholder element 28 corresponds to the respective dimensions of the previously discussed embodiment.
- This metal strip 20 forms in relation to FIG. 4, 5 shown arrangement the lower neighbor of the placeholder element 28.
- Adjacent to the upper longitudinal side of the placeholder element 28 is on the other hand, another metal strip 20, which in turn forms the contact surface for PTC heating elements 18 on its opposite longitudinal side.
- the lower longitudinal side of the placeholder element 28 rests only for electrical contacting of the adjacent radiator element 22 with the interposition of a metal strip 20 on this radiator element 22, located on the opposite side a complete heat-generating element 16.
- the width of the placeholder element 28 substantially corresponds to the width of a Radiator element 22.
- the thickness of the lower sheet metal strip 20 contributes substantially nothing to the overall thickness of the layer structure and can be easily compensated by the spring travel of the two springs 24. Consequently, it is not absolutely necessary to consider the thickness of a sub-layer of the heat-generating element, in particular a metal strip 20 in the design of the spacer element 28 in the width direction of the layer structure, at least in those cases in which the layer structure by one or more springs under bias in clamped in the frame.
- the placeholder element 28 preferably should be formed with a width corresponding to the width of the radiator element 22 width.
- a possible tolerance compensation can be effected by the spring 24.
- further sheet-metal strips can also be inserted into the frame 2, which merely serve for the slight broadening of the layer structure.
- FIGS. 4 and 5 is the placeholder element in the middle of the layer structure and serves - as FIG. 5 to be taken - the electrical insulation of various heating circuits within the heating block 14.
- FIG. 5 can be seen, the arranged above the placeholder element 28 part of the heating block 14 two in FIG. 5 to the left from the heating block 14 emerging contact elements 17, which are assigned to a single heating circuit 15 within the frame 2.
- the heating circuit 15 is understood to be a subunit of the heating block 14 to be controlled or controlled separately.
- the associated control or regulating elements can for example be connected directly to the frame 2.
- the upper heating circuit 15a is electrically and thermally separated from the lower heating circuit, which means that substantially no heat conduction in the plane defined by the frame 2 transversely to the layers of the layer structure between the one heating block 15a and the other heating block 15b is directed.
- the placeholder element 28 is preferably formed from an electrically and / or a thermally insulating material.
- the placeholder element is an injection-molded plastic part, which reduces the space provided for receiving heat-generating elements 16 and heat-emitting elements 22 in the frame by about 17%, in the transverse direction of the layer structure, ie in the width direction.
- this space is formed essentially by the opposite edges of the contact surfaces 10, since the spring 24 is an integral part of the frame 2 and is received between the frame halves 4a, 4b.
- the space in question here is formed by the opposite side surfaces of the frame 4.
- FIG. 7 shows a further exemplary embodiment in which the installation space provided for accommodating heat-generating elements 16 and heat-emitting elements 22 in the frame is reduced in the longitudinal direction of the layer structure by two placeholder elements 40 arranged on the front side of the heating block 14.
- the provision or removal of the placeholder elements 40 accordingly requires a lengthwise adaptation of the individual layers of the layer structure and thus a modification to the plant layers preparing the respective layers of a device for producing the electric heating device.
- it can also be thought of forming the individual elements of the layer structure in the length direction of the same subdivided and at the interfaces, which are preferably behind the transverse webs of the grid structure 16, electrically and / or thermally conductively to each other.
- the space provided in the longitudinal direction of the layer structure can be changed without much effort by one or more, preferably at the grid of the grid structure 26 adapted placeholder elements.
- the present invention is not limited to the embodiments shown.
- a frame which has identical outer dimensions.
- the frame may contain one or more placeholder elements to reduce the effective space for receiving a heating block.
- the space is reduced, without it being necessary to change the outer dimensions of the frame. It can thus be very economical to produce electric heaters with different heat outputs.
- heating systems are being considered, in particular, as auxiliary heaters for a motor vehicle with average heating powers of approximately 700 to 1200 W.
- the placeholder elements can occupy up to 50% of the interior of the frame. If the placeholder elements have air passage openings, the desired end temperature of the airflow downstream of the electric heating device can be adjusted with the placeholder elements via a mixing of heated air passing through the heating block and cold air passing through the placeholder elements. In addition, it can generate a hot air stream enclosing cold air flow through which the plastic parts of the air duct provided downstream of the heater are thermally protected, provided that the or the placeholder elements fully or teilumffitlich on outer edge of the inner surface of the frame are provided.
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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)
- Air-Conditioning For Vehicles (AREA)
- Resistance Heating (AREA)
- Direct Air Heating By Heater Or Combustion Gas (AREA)
Description
Die vorliegende Erfindung betrifft eine elektrische Heizeinrichtung mit einem Rahmen, in dem ein unter Federvorspannung gehaltener Schichtaufbau aus wärmeabgebenden Radiatorelementen und dazwischen angeordneten wärmeerzeugenden Elementen umfassend zwischen parallelen Kontaktstreifen angeordneten PTC-Heizelementen vorgesehen ist.The present invention relates to an electric heater having a frame in which a spring-loaded layer structure of heat-emitting radiator elements and arranged therebetween heat-generating elements is provided between parallel contact strips arranged PTC heating elements.
Eine derartige elektrische Heizeinrichtung ist beispielsweise aus der gattungsgemäßen
Elektrische Heizeinrichtungen der gattungsgemäßen Art kommen insbesondere in Kraftfahrzeugen zum Einsatz. Dabei werden für verschiedene Automobile elektrische Heizeinrichtungen mit unterschiedlichen elektrischen Heizleistungen hergestellt, was jeweils eine Anpassung der Rahmengeometrie erforderlich macht. Zwar besteht die Möglichkeit, die einzelnen Schenkel der Rahmen als modulare Bauteile zu fügen und mit unterschiedlicher Länge und einfachen Verbindungen an den Eckpunkten des Rahmens auszubilden (vgl.
Der vorerwähnte Stand der Technik betrifft jeweils elektrische Heizeinrichtungen, bei denen der Schichtaufbau unter Federvorspannung In dem Rahmen gehalten ist, Davon unterscheidet sich grundsätzlich eine Heizanordnung, wie sie aus der
Der vorliegenden Erfindung liegt das Problem zugrunde, eine gattungsgemäße Heizeinrichtung zu schaffen, die sich einfach und kostengünstig an verschiedene Heizleistungen anpassen lässt.The present invention is based on the problem to provide a generic heating device that can be easily and inexpensively adapted to different heat outputs.
Zur Lösung des obigen Problems wird mit der vorliegenden Erfindung eine elektrische Heizeinrichtung mit den Merkmalen von Anspruch 1 vorgeschlagen. Diese unterscheidet sich von dem gattungsbildenden Stand der Technik durch wenigstens ein in dem Rahmen aufgenommenes Platzhalterelement.To solve the above problem, the present invention proposes an electric heater having the features of claim 1. This differs from the generic state of the art by at least one placeholder included in the frame.
Das Platzhalterelement ist ein bei wärmemäßiger Betrachtung der Heizeinrichtung im wesentlichen unwirksames Element. Die Wahl eines geeigneten Platzhalterelementes wird vornehmlich durch Kostenüberlegungen bestimmt. Das Platzhalterelement ist weder ein wärmeerzeugendes Element, noch hat es eine den Radiator- bzw. wärmeabgebenden Elementen entsprechende Eignung zur Wärmeabgabe an die Luft. Allerdings kann sich das Platzhalterelement aufgrund von Wärmeleitung in der Ebene des Heizblockes erwärmen. Da sich das Platzhalterelement in dem Innenraum des Rahmens befindet und dementsprechend von der durch den Rahmen durchströmenden Luft angeströmt wird, kann die Erwärmung des Platzhalterelementes auch in geringem Maße zur Wärmeabgabe der elektrischen Heizeinrichtung beitragen.The placeholder element is a thermally ineffective consideration of the heater substantially ineffective element. The choice of a suitable placeholder element is determined primarily by cost considerations. The placeholder element is neither a heat-generating element, nor does it have the radiator or heat-emitting elements suitable suitability for heat dissipation to the air. However, the placeholder element may heat up due to heat conduction in the plane of the heating block. Since the placeholder element is located in the interior of the frame and accordingly is flowed through by the air flowing through the frame, the heating of the placeholder element can also contribute to a small extent to the heat output of the electric heater.
Das Platzhalterelement der erfindungsgemäßen elektrischen Heizeinrichtung befindet sich innerhalb des Rahmens, d.h. liegt im Innenraum des Rahmens frei und wird von der den Rahmen durchströmenden Luft angeströmt. Das Platzhalterelement kann am Rand des Heizblockes, d.h. unmittelbar zwischen den wärmeerzeugenden und wärmeabgebenden Elementen und einem Schenkel des Rahmens vorgesehen sein. Alternativ kann das Platzhalterelement auch integraler Bestandteil des Heizblocks sein. Es können ein oder mehrere Platzhalterelemente vorgesehen sein.The placeholder element of the electric heating device according to the invention is located within the frame, ie is exposed in the interior of the frame and is flowed through by the air flowing through the frame. The placeholder element can be on the edge the heating block, ie be provided directly between the heat-generating and heat-emitting elements and a leg of the frame. Alternatively, the placeholder element can also be an integral part of the heating block. One or more placeholder elements can be provided.
Bei der Herstellung von gattungsgemäßen elektrischen Heizeinrichtungen werden üblicherweise Radiatorelemente identischer Abmessungen und wäremerzeugende Elemente identischer Abmessung in den Rahmen eingebaut, wobei sich regelmäßig Radiatorelemente und wärmeerzeugende Elemente abwechseln. Mitunter können auch die wärmeerzeugenden Elemente durch einen oder mehrere Trägerstreifen ersetzt werden, deren Abmessung im wesentlichen den Abmessungen der wärmeerzeugenden Elemente entspricht, die jedoch keine PTC-Heizelemente enthalten und deren Hauptfunktion die Schaffung einer ebenen Anlagefläche für benachbarte Radiatorelemente ist (vgl.
Weitere Einzelheiten, Vorteile und Merkmale der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen in Verbindung mit der Zeichnung. In dieser zeigen:
- Figur 1
- eine perspektivische Seitenansicht eines ersten Ausführungsbeispiels einer erfindungsgemäßen Heizeinrichtung;
- Figur 2
- das Platzhalterelement des in
Figur 1 gezeigten Ausführungsbeispiels; - Figur 3
- das in
Figur 1 gezeigte Ausführungsbeispiel bei teilweise weggeschnittenem Rahmen; - Figur 4
- eine perspektivische Seitenansicht eines weiteren Ausführungsbeispiels der erfindungsgemäßen Heizeinrichtung;
- Figur 5
- das in
Figur 4 gezeigte Ausführungsbeispiel in Längsschnittansicht bei teilweise weggeschnittenem Rahmen; - Figur 6
- eine perspektivische Seitenansicht eines dritten Ausführungsbeispiels der erfindungsgemäßen Heizeinrichtung; und
- Figur 7
- eine perspektivische Seitenansicht eines vierten Ausführungsbeispiels der erfindungsgemäßen Heizeinrichtung.
- FIG. 1
- a side perspective view of a first embodiment of a heating device according to the invention;
- FIG. 2
- the placeholder element of in
FIG. 1 shown embodiment; - FIG. 3
- this in
FIG. 1 embodiment shown in partially cutaway frame; - FIG. 4
- a perspective side view of another embodiment of the heating device according to the invention;
- FIG. 5
- this in
FIG. 4 embodiment shown in longitudinal section view in partially cutaway frame; - FIG. 6
- a side perspective view of a third embodiment of the heating device according to the invention; and
- FIG. 7
- a perspective side view of a fourth embodiment of the heating device according to the invention.
In den
Der Heizblock 14 besteht aus länglichen Elementen, nämlich zum Einen wärmeerzeugenden Elementen 16, die durch mehrere in einer Ebene hintereinander liegende PTC-Heizelemente 18, die jeweils zwischen parallelen Blechstreifen 20 angeordnet sind, gebildet sind. Darüber hinaus umfasst der Heizblock 14 aus mäandrierend gebogenen Blechstreifen 20 gebildete wärmeabgebende Radiatorelemente 22. Die wärmeerzeugenden Elemente 16 und die Radiatorelemente 22 sind im wesentlichen mit gleicher Länge und mit gleicher Dicke (Abmessung rechtwinklig zur Rahmenebene) ausgebildet. Der Heizblock liegt vorzugsweise lediglich in Breitenrichtung gegen die Innenseite des Rahmens 2 an. Vorliegend wird der Heizblock 14 in dem Rahmen unter Vorspannung einer in den Rahmen 2 integrierten Feder 24 gehalten, die detailliert in der Europäischen Patentanmeldung
Der Rahmen 2 weist an seinen Seitenflächen eine Gitterstruktur 26 mit sich rechtwinklig erstreckenden Längs- und Querstegen auf. Die Gitterstruktur 26 ist derart ausgebildet, dass die Längsstreben mit den wärmeerzeugenden Elementen 16 fluchten. Die wärmeabgebenden Radiatorelemente 22 liegen über durch die Gitterstruktur 26 gebildete Fenster beidseitig zu den Außenseiten des Rahmens 2 frei.The frame 2 has on its side surfaces on a
Bei dem in
Das Platzhalterelement 28 wird vorliegend durch ein Kunststoffspritzgussteil gebildet, welches eine Wabenstruktur 30 aufweist, die in
Bei dem in den
Die
Das in den
Bei dem Ausführungsbeispiel der
Bei dem in den
In Figur 7 ist schließlich ein weiteres Ausführungsbeispiel gezeigt bei welchem der zur Aufnahme von wärmeerzeugenden Elementen 16 und wärmeabgebenden Elementen 22 in dem Rahmen vorgesehene Bauraum in Längsrichtung des Schichtaufbaus durch zwei an der Stirnseite des Heizblocks 14 angeordnete Platzhalterelemente 40 verringert wird.Finally, FIG. 7 shows a further exemplary embodiment in which the installation space provided for accommodating heat-generating
Das Vorsehen oder Entnehmen der Platzhalterelemente 40 erfordert dementsprechend eine längenmäßige Anpassung der einzelnen Lagen des Schichtaufbaus und somit eine Modifikation an den die jeweiligen Lagen vorbereitenden Anlagenteile einer Vorrichtung zur Herstellung der elektrischen Heizeinrichtung. Alternativ kann auch daran gedacht werden, die einzelnen Elemente des Schichtaufbaus in Längenrichtung desselben unterteilt auszubilden und an den Schnittstellen, die vorzugsweise hinter den Querstegen der Gitterstruktur 16 liegen, elektrisch und/oder wärmeleitmäßig miteinander zu verbinden. Bei einem solchen modularen Aufbau kann ohne großen Aufwand auch der vorgesehene Bauraum in Längsrichtung des Schichtaufbaus durch ein oder mehrere, vorzugsweise an dem Raster der Gitterstruktur 26 angepasste Platzhalterelemente verändert werden.The provision or removal of the
Die vorliegende Erfindung ist nicht auf die gezeigten Ausführungsbeispiele beschränkt. Allerdings wird bei der Ausbildung der erfindungsgemäßen elektrischen Heizeinrichtung für Heizeinrichtungen mit unterschiedlicher Heizleistung ein Rahmen verwendet, der identische Außenabmessungen aufweist. Der Rahmen kann zur Verminderung des effektiven Bauraums zur Aufnahme eines Heizblockes ein oder mehrere Platzhalterelemente enthalten. Hierdurch wird der Bauraum vermindert, ohne dass es erforderlich ist, die Außenabmessungen des Rahmens zu verändern. Es lassen sich somit sehr wirtschaftlich elektrische Heizeinrichtungen mit unterschiedlichen Heizleistungen herstellen. Gedacht ist derzeit insbesondere an Heizeinrichtungen als Zuheizer für ein Kraftfahrzeug mit mittleren Heizleistungen von etwa 700 bis 1200 W.The present invention is not limited to the embodiments shown. However, in the design of the electric heater according to the invention for heaters with different heating power, a frame is used which has identical outer dimensions. The frame may contain one or more placeholder elements to reduce the effective space for receiving a heating block. As a result, the space is reduced, without it being necessary to change the outer dimensions of the frame. It can thus be very economical to produce electric heaters with different heat outputs. At present, heating systems are being considered, in particular, as auxiliary heaters for a motor vehicle with average heating powers of approximately 700 to 1200 W.
Praktische Versuche haben gezeigt, dass die Platzhalterelemente bis zu 50% des Innenraums des Rahmens einnehmen können. Sofern die Platzhalterelemente Luftdurchtrittsöffnungen aufweisen, kann mit den Platzhalterelementen über eine Durchmischung von durch den Heizblock hindurchtretender erwärmter Luft und durch die Platzhalterelemente hindurchtretender kalter Luft die gewünschte Endtemperatur des Luftstromes stromabwärts der elektrischen Heizeinrichtung eingestellt werden. Darüber hinaus lässt sich ein den heißen Luftstrom umhüllender Kaltluftstrom erzeugen, durch den die Kunststoffteile des stromabwärts der Heizeinrichtung vorgesehenen Luftkanals thermisch geschützt werden, sofern das oder die Platzhalterelemente voll- oder teilumfänglich am äußeren Rand der Innenfläche des Rahmens vorgesehen sind.Practical experiments have shown that the placeholder elements can occupy up to 50% of the interior of the frame. If the placeholder elements have air passage openings, the desired end temperature of the airflow downstream of the electric heating device can be adjusted with the placeholder elements via a mixing of heated air passing through the heating block and cold air passing through the placeholder elements. In addition, it can generate a hot air stream enclosing cold air flow through which the plastic parts of the air duct provided downstream of the heater are thermally protected, provided that the or the placeholder elements fully or teilumfänglich on outer edge of the inner surface of the frame are provided.
- 22
- Rahmenframe
- 4a4a
- Kunststoff-RahmenhälftePlastic frame half
- 4b4b
- Kunststoff-RahmenhälftePlastic frame half
- 66
- Flanschelementflange
- 88th
- Steckergehäuseplug housing
- 1010
- Anlageflächencontact surfaces
- 1212
- Innenrauminner space
- 1414
- Heizblockheating block
- 1515
- Heizkreisheating circuit
- 1616
- wärmeerzeugendes Elementheat generating element
- 1717
- Kontaktelementcontact element
- 1818
- PTC-HeizelementPTC heating element
- 2020
- Blechstreifenmetal strip
- 2222
- Radiatorelementradiator element
- 2424
- Federfeather
- 2626
- Gitterstrukturlattice structure
- 2828
- PlatzhalterelementTemplate item
- 3030
- Wabenstrukturhoneycomb structure
- 3232
- Längssteglongitudinal web
- 3434
- Querstegcrosspiece
- 3636
- LuftdurchtrittsöffnungAir passage opening
- 4040
- Platzhalterelement zur Verringerung des Bauraums in Längsrichtung des SchichtaufbausPlaceholder element for reducing the installation space in the longitudinal direction of the layer structure
Claims (18)
- Electric heating device, in particular for a motor vehicle, having a frame (2), in which a laminated structure of heat-dissipating elements (22) with heat-generating elements (16) disposed therebetween, which comprises PTC heating elements (18) disposed between parallel contact strips (20), is provided and held under spring bias in the frame (2),
characterized by
at least one dummy element (28) that is accommodated in the frame (2). - Electric heating element according to claim 1, characterized in that an installation space provided for accommodating heat-generating elements (16) and heat-dissipating elements (22) in the frame (2) is reduced in longitudinal direction of the laminated structure by the dummy element (28).
- Electric heating device according to claim 1 or 2, characterized in that an installation space provided for accommodating heat-generating elements (16) and heat-dissipating elements (22) in the frame (2) is reduced in transverse direction of the laminated structure by the dummy element (28).
- Electric heating device according to one of the preceding claims, characterized in that an installation space provided for accommodating heat-generating elements (16) and heat-dissipating elements (22) in the frame (2) is reduced by up to 50% by the dummy element (28).
- Electric heating device according to one of the preceding claims, characterized in that an installation space provided for accommodating heat-generating elements (16) and heat-dissipating elements (22) in the frame (2) is reduced by at least 10%, preferably 20% by the dummy element (28).
- Electric heating element according to one of the preceding claims, characterized in that the dummy element (28) is provided instead of a heat-dissipating element (22) and/or a heat-generating element (16) and/or instead of partial layers thereof.
- Electric heating device according to one of the preceding claims, characterized in that the dummy element (28) in width direction of the elements of the laminated structure has the same width as a heat-dissipating element (22) and/or a heat-generating element (16) and/or partial layers thereof.
- Electric heating device according to one of the preceding claims, characterized in that the dummy element (28) has a thickness corresponding substantially to the thickness of the laminated structure.
- Electric heating device according to one of the preceding claims, characterized in that the dummy element (28) is designed in dimensions corresponding substantially to the dimensions of the heat-dissipating element (22).
- Electric heating device according to one of the preceding claims, characterized in that the laminated structure comprises a plurality of identically dimensioned heat-dissipating elements (22) and identically dimensioned heat-generating elements (16) and that each of the dummy elements (28) is designed substantially with the dimensions of the heat-dissipating element (22) and/or of the heat-generating element (16) and/or partial layers thereof.
- Electric heating device according to one of the preceding claims, characterized in that the dummy element (28) is formed from an electrically and/or thermally insulating material.
- Electric heating device according to one of the preceding claims, characterized in that the dummy element (28) is formed from plastics material.
- Electric heating device according to one of the preceding claims, characterized in that a plurality of separate heating circuits are provided with heat-generating elements and that between the heat-generating elements of separate heating circuits at least one dummy element (28) is disposed.
- Electric heating device according to one of the preceding claims, characterized in that the dummy element (28) is designed as part of the frame (2) formed from plastics material.
- Electric heating device according to one of the preceding claims, characterized in that the dummy element (28) is integrated as a separate component into the laminated structure.
- Electric heating device according to one of the preceding claims, characterized in that the dummy element (28) is provided with air through-holes (36).
- Electric heating device according to one of the preceding claims, characterized in that the dummy element (28) offers substantially the same flow resistance to the air stream passing through the frame (2) as a heat-dissipating element (22).
- Electric heating device according to one of the preceding claims, characterized in that the dummy element (28) lies flat against the adjacent element (20, 22) of the laminated structure.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510026238 DE102005026238A1 (en) | 2005-06-07 | 2005-06-07 | Electric heater |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1731340A1 EP1731340A1 (en) | 2006-12-13 |
EP1731340B1 true EP1731340B1 (en) | 2009-03-11 |
EP1731340B8 EP1731340B8 (en) | 2009-08-19 |
Family
ID=36843216
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20060011698 Active EP1731340B8 (en) | 2005-06-07 | 2006-06-07 | Electric heating device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1731340B8 (en) |
DE (2) | DE102005026238A1 (en) |
ES (1) | ES2321221T3 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2266823A1 (en) | 2009-06-19 | 2010-12-29 | Eberspächer catem GmbH & Co. KG | Electric heating device |
EP2268103A1 (en) | 2009-06-19 | 2010-12-29 | Eberspächer catem GmbH & Co. KG | Electric heating device |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE502004007494D1 (en) * | 2004-07-28 | 2008-08-14 | Behr France Rouffach Sas | Heating arrangement with a heating element, in particular for a motor vehicle |
EP2080650B1 (en) * | 2008-01-21 | 2014-06-04 | Behr France Rouffach SAS | Device for heating an exhaust gas stream |
EP2161514B1 (en) | 2008-09-04 | 2017-04-12 | Mahle Behr France Rouffach S.A.S | Heat exchanger |
FR2942867B1 (en) * | 2009-03-03 | 2011-03-25 | Valeo Systemes Thermiques | HEATING DEVICE, IN PARTICULAR FOR A MOTOR VEHICLE |
FR2954470B1 (en) * | 2009-12-23 | 2012-02-10 | Valeo Systemes Thermiques | ELECTRICAL HEATING DEVICE AND CORRESPONDING HEATING APPARATUS |
EP2466222B1 (en) | 2010-12-20 | 2013-06-05 | Eberspächer catem GmbH & Co. KG | Electric heating device |
DE102012011903C5 (en) | 2012-06-14 | 2023-06-15 | Eberspächer Catem Gmbh & Co. Kg | Electric heater |
EP3141842B1 (en) * | 2015-09-11 | 2019-11-06 | Mahle International GmbH | Ptc heater for an air conditioning system, in particular of a motor vehicle |
DE102019128467A1 (en) * | 2019-10-22 | 2021-04-22 | Webasto SE | Electric heating devices, in particular for mobile applications |
CN111059765B (en) * | 2019-12-30 | 2025-01-24 | 江西福铃汽车部件有限公司 | A connection structure of louvered heat transfer blade grid |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2031184T3 (en) * | 1988-07-15 | 1992-12-01 | David & Baader Dbk Spezialfabrik Elektrischer Apparate Und Heizwiderstande Gmbh | RADIATOR |
DE19911547C5 (en) | 1999-03-16 | 2005-12-01 | Behr Gmbh & Co. Kg | Electric heating device for a motor vehicle |
ES2300511T3 (en) * | 2003-03-13 | 2008-06-16 | BEHR GMBH & CO. KG | ELECTRICAL HEATING DEVICE, IN PARTICULAR FOR A CAR. |
DE502004007494D1 (en) | 2004-07-28 | 2008-08-14 | Behr France Rouffach Sas | Heating arrangement with a heating element, in particular for a motor vehicle |
-
2005
- 2005-06-07 DE DE200510026238 patent/DE102005026238A1/en not_active Withdrawn
-
2006
- 2006-06-07 DE DE200650003060 patent/DE502006003060D1/en active Active
- 2006-06-07 ES ES06011698T patent/ES2321221T3/en active Active
- 2006-06-07 EP EP20060011698 patent/EP1731340B8/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2266823A1 (en) | 2009-06-19 | 2010-12-29 | Eberspächer catem GmbH & Co. KG | Electric heating device |
EP2268103A1 (en) | 2009-06-19 | 2010-12-29 | Eberspächer catem GmbH & Co. KG | Electric heating device |
Also Published As
Publication number | Publication date |
---|---|
ES2321221T3 (en) | 2009-06-03 |
DE102005026238A1 (en) | 2006-12-14 |
EP1731340B8 (en) | 2009-08-19 |
DE502006003060D1 (en) | 2009-04-23 |
EP1731340A1 (en) | 2006-12-13 |
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