EP2519076A2 - Electric heating module for airflow heating - Google Patents
Electric heating module for airflow heating Download PDFInfo
- Publication number
- EP2519076A2 EP2519076A2 EP11192857A EP11192857A EP2519076A2 EP 2519076 A2 EP2519076 A2 EP 2519076A2 EP 11192857 A EP11192857 A EP 11192857A EP 11192857 A EP11192857 A EP 11192857A EP 2519076 A2 EP2519076 A2 EP 2519076A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat
- core
- heating module
- electric heating
- conducting
- 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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- 238000005485 electric heating Methods 0.000 title claims description 40
- 238000001125 extrusion Methods 0.000 claims description 29
- 230000017525 heat dissipation Effects 0.000 claims description 25
- 238000005266 casting Methods 0.000 claims description 14
- 238000009826 distribution Methods 0.000 claims description 12
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Images
Classifications
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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
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
- H05B3/24—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor being self-supporting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
-
- 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
- F24H3/0411—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 for domestic or space-heating systems
-
- 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
-
- 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
-
- 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 invention relates to an electric heating module for air flow heating according to the preamble of the appended claim 1 as well as extruded, cast or extruded profiles which can be used in such an electric heating module.
- a heating module of the present type comprises at least one planar PTC element with a first and a second contact surface, as well as an airflowable heat dissipation region, in which thermally conductive fins are arranged, which are in operative connection with the PTC element.
- the PTC element is arranged between a first part and a second part of a heat- and current-conducting core and rests with its first contact surface on the first core part and with its second contact surface on the second core part.
- the PTC element thus gives off heat to the two core parts and can be electrically contacted simultaneously via the two core parts.
- the heat and current conducting core also carries the fins which heat a stream of air flowing through the heat dissipation area.
- PTC elements are semiconductor resistors made of ceramic whose ohmic resistance is temperature-dependent.
- the resistance-temperature characteristic behaves non-linearly: The resistance of a PTC heating element initially drops slightly with increasing component temperature, then rises very steeply at a characteristic temperature (reference temperature).
- the PTC resistance increases rapidly, limiting the electrical power consumption to a very low level.
- the component temperature then approaches an upper limit, which depends on the heat absorption of the surroundings of the PTC heating element. Under normal environmental conditions, the component temperature of the PTC heating element can therefore not rise above a characteristic maximum temperature, even if the desired heat dissipation in case of failure is completely interrupted.
- This and the self-regulating properties of a PTC heating element based on which the absorbed electrical power corresponds exactly to the output thermal power, predestined PTC heating elements for use in heating or air conditioning systems of vehicles or other applications of air flow heating in vehicles or residential areas. Because of safety reasons, no flammable temperatures may arise in the heating element in these applications even in case of failure, nevertheless a high heating capacity is required in normal operation.
- EP 1 479 918 A1 is a complete fan module, consisting of a housing integrated in a radial fan and a heating module disclosed that is to serve for seat heating in a ventilated motor vehicle seat. Since a motor vehicle seat for safety reasons, even at failure of the fan on the surface of a maximum temperature that is tolerable for humans, must not exceed, heating modules with PTC heating elements are ideal, especially as they with the same security a much higher heating capacity than the mats conventionally used in seat heaters with electrical resistance wires whose power consumption must be very limited for safety reasons.
- the previously known electric heating modules with PTC elements usually consist of several layers of surface next to each other arranged, with its narrow side in the air flow PTC heating elements, which are electrically contacted at their flat tops and their lower sides with contact plates.
- the adjoining heat dissipation areas have meandering arranged metal fins, which are also with their narrow side in the air flow and thermally contact the Koritakt michsbleche the PTC heating elements at regular intervals for heat transfer on its broadside,
- thermal adhesive or other bonding techniques can be used;
- an electric heating module of the type mentioned is proposed with an annular, in particular circular heat dissipation area, in which the heat-conducting fins are arranged substantially radially. This simplifies the assembly, especially if it is to be automated, and increases the efficiency of the heat transfer to the guided through the slats or the heat dissipation area airflow.
- blower module for motor vehicle seats is in the EP 1 464 533 A1 to find.
- An example of a heating module which is provided in the manner of a hair dryer with a fan and resistance heating wires in the air stream is in the US 6,541,737 B1 described.
- an electric heating module of the type mentioned is disclosed with improved ease of installation.
- the slats used there are supported by a thermally conductive retaining ring. If two such retaining rings are used with corresponding lamellar rings, these form a divisible, heat and current conducting core which is divisible into a first and a second core part. Between these two core parts a flat PTC element is inserted so that an electrically conductive and at the same time heat-conducting contact between the two contact surfaces of the PTC element and one core part results.
- an annular seal is inserted between the two core parts, which surrounds the PTC element and sealingly encloses between the two core parts.
- frame member provides for the sealing of the gap between the two core parts in which the PTC element sits.
- the heat-conducting lamellae of this prior art according to the DE 10 2007 006 058 A1 are, as in the other above-mentioned prior art, made of bent and folded metal sheets. Although this can be done by machine, but the fitting of the slats in the core parts is quite complex and leads to a not very high intrinsic stability of the component formed from the laminated ring and core part of the overall module.
- the present invention seeks to improve the ease of installation of an electric heating module of the present type by constructive modifications.
- the present invention makes spring elements and assembly work with prestressed assemblies superfluous, because according to the invention a fastener is present, which passes through the first core part, the PTC element and the second core part and fixed to each other, in particular by means of mutually aligned holes in these components.
- a fastener may consist of a screw-nut combination;
- attachment such as a rivet connection, a connector with retaining rings or cotter pins, etc. in the context of the present invention can be used as a fastener.
- a screw connection is particularly easy to assemble.
- the fastening element In order to be able to compensate for possible thermal stresses and mechanical loads, it is preferable to provide the fastening element with a spring element which biases the first core part, the PTC element and the second core part elastically against each other.
- This spring element can be integrated in the fastening element or be arranged as a spring washer, soft elastic coating and the like somewhere between the components involved.
- the two core parts and the PTC element are stable and permanently fixed to one another with a defined preload and with a correspondingly good heat dissipation from the PTC element into the core parts, so that this assembly is particularly easy to assemble.
- a housing into which the present electrical heating module is preferably installed together with a fan can be kept free from holding forces and counterforce resulting from spring elements which have been used in the prior art.
- the electrical heating module according to the invention can therefore be easily inserted into a housing or clicked over a snap connection Be what the installation of a heating module with housing and fan, as it is installed, for example, in vehicle seats for heating and ventilation of the same, again significantly simplifies.
- the fastening element is electrically conductive and serves as a power supply to either the first or the second core part.
- it preferably sits in an electrically insulating sleeve, which extends at least over one of the two core parts and the PTC element away.
- the PTC element can then be electrically contacted from only one side.
- a first electrical lead is connected to the first core part, and a second electrical lead is connected to the fastening element, which is electrically insulated from the first core part.
- the electrical contact is preferably further simplified in that the sleeve which surrounds the fastening element electrically insulating, protrudes outside the bores of the core parts and the PTC element in a disc which is arranged between two electrical contact elements, in particular cable ferrules, and these electrically from each other separates.
- a first of these two electrical contact elements then sits between the cantilevered disc and the first core part, so that in this way the first core part is contacted, while the second electrical contact element sits between the disc and the securing or projecting part of the fastening element.
- this projecting part may be a nut, a screw head, a rivet, a washer, a spacer, a split pin, or the like.
- the heat-conducting fins are no longer made, as in the prior art, as bent and folded metal sheets, but made as an extruded profile, in particular of aluminum or aluminum alloys, which are inherently stable and particularly good heat conducting.
- an extruded profile which consists in particular of aluminum or an aluminum alloy, but may also consist of other thermally conductive materials
- a cast profile for example produced by die casting, injection molding or other casting method, and an extrusion profile can be used, wherein for the latter in particular thermally conductive plastics can be used.
- a first extrusion, casting or extrusion profile sits on the first core part and a second profile on the second core part.
- Such an extrusion, casting or extrusion profile has several advantages: This includes the ability to create by circulating pressing with the respective core part an optimal heat transfer between the core part and the heat dissipation area, Furthermore, it is possible and preferred, the heat-conducting fins of the To design extruded profiles so that their cross section in the flow direction decreases with increasing distance from the core, which increases the efficiency of the heat conduction within the slats and the efficiency of the heat transfer from the slats to the air flow flowing through.
- the efficiency of the heat transfer from the lamellae to the air flow flowing through can advantageously also be increased by virtue of the fact that the heat-conducting lamellae have a substantially black surface.
- the lamellae are made of aluminum or an aluminum alloy, this can expediently be carried out in the anodizing process, so that the heat-conducting lamellae have a black anodized surface.
- the thermally conductive fins such that they form a stem from the core and this strain branches at least once into two or more branches as it is removed from the core.
- the heat release region can be structured uniformly, create a particularly large surface area of the heat-conducting lamellae, at which the heat transport into the air flow occurs, and achieve particularly low air flow losses. This increases the heat transfer, improves the response time and efficiency of the heating module and reduces airflow noise. Furthermore, smaller fans can be used for the same effect.
- the present invention thus makes possible overall axle mounting of an electrical heating module with a sandwich-like construction with a central fastening element which simultaneously electrically contacts the PTC element.
- the heat dissipation region can here, as well as the PTC element and the core parts, viewed in the flow direction, circular, flattened or oval or polygonal, for example rectangular or trapezoidal.
- the present invention also includes extruded, cast or extruded profiles with thermally conductive fins, which are intended in particular for use in a heat-emitting region of an electric heating module according to the invention, that can be part of such an electric heating module in the context of the present invention; At the same time, however, the profiles according to the invention can also be used elsewhere. As mentioned, are in the context of the present invention under extrusion, casting and extrusion profiles To understand profiles that have been produced in any casting process, such as in particular die casting and injection molding, or in an extrusion or extrusion process.
- Suitable materials for this are all castable and / or extrudable, heat-conducting materials in question, in particular aluminum and aluminum alloys, but also other metals such as copper and copper alloys, or else heat-conductive plastics and ceramic materials.
- the heat-conducting lamellae of the profile have a substantially black, in particular black anodized surface. This improves the heat transfer in the passing air stream.
- a first profile according to the invention comprises heat-conducting lamellae, of which at least one subset is in each case shaped in such a way that the lamellae form a stem which extends essentially radially outwards from the core, and this trunk becomes at least once in two or more as the distance from the core increases more branches branches.
- this trunk becomes at least once in two or more as the distance from the core increases more branches branches.
- the branch increases the heat transfer surface from the fins to the air flow, which significantly improves the heat transfer into the air flow.
- the branching and the penetration of the heat-dissipating area with heat-conducting lamellae or branches ensures a substantially laminar flow through the heat-dissipating area, which in turn is advantageous in terms of flow.
- a second extrusion, casting or extrusion profile according to the present invention has at least a subset of thermally conductive fins formed to form a stem extending substantially radially away from the core, to which a plurality of substantially is formed perpendicular to the main extension direction of the trunk from this forthcoming branches.
- These branches are preferably formed progressively longer with increasing distance from the core, so that they penetrate the largest possible area of the heat dissipation area.
- a third profile according to the present invention has a heat spreader ring radially spaced around the core and provided with heat conductive fins extending radially inwardly to the core.
- the heat distribution ring is also provided radially outwardly with heat-conducting fins.
- the heat distribution ring may be closed, but this is not always necessary.
- a particularly preferred variant of a profile according to the invention consists of at least two modules, which can be assembled, wherein a first module surrounds the core and is thermally conductively connected thereto, and a second module is attachable to the first module so that it surrounds and with this is thermally conductively connected.
- a third and fourth modules, etc. which can be applied radially outward to increase the heat dissipation area. This makes it possible to adapt the heat dissipation area to different fan diameters, which can be attached to the electric heating module and form with it a heating fan.
- extruded, cast or extrusion profiles according to the invention are preferably formed in a circular projection, but this need not be.
- profiles that are polygonal in their projection for example rectangular, or oval or flattened. This is especially true for the inventive profile with heat distribution ring.
- the different variants of profiles described above can also be combined in the context of the present invention.
- FIG. 1 schematically shown in section electric heating module has as the heart of a flat PTC element 1, which, surrounded by a sealing ring 2, sits between a first core part 3 and a second core part 4.
- the sealing ring 2 ensures that the PTC element 1 is protected from external influences protected from the outside.
- first heat-emitting block 5 which consists of an aluminum extruded profile, which surrounds the first core part 3 circularly, forms a plurality of substantially radially extending, heat-conducting fins. These will be explained later FIG. 3 described in more detail.
- a second heat-emitting block 6 is seated on the second core part 4. The heat-dissipating blocks 5 and 6 cover a heat-dissipating area 7, through which an air stream 8 flows through air to be heated.
- the flat PTC element 1 has on the upper side a first contact surface 9 and on its underside a second contact surface 10, wherein these two contact surfaces 9, 10 are used both for electrical contacting of the PTC element 1 and for heat dissipation.
- the first core part 3, the PTC element 1 and the second core part 4 are held together by a fastening element 11 biased against each other.
- this fastening element passes through the said three components 1, 3, 4, in the present embodiment by means of central bores; Accordingly, the PTC element 1 is present in the form of a perforated disk.
- the fastening element 11 consists in the present embodiment of a cylinder screw 12 with a head 13 with square inner and a shank 14 which passes through the holes in the two core parts 3, 4 and the PTC element 1.
- a hex nut 15 is screwed and secured by a toothed wheel 16.
- a spring washer 17 between the head 13 of the cylinder screw 12 and the second core part 4 provides a permanent, defined biasing force, which is exerted by the fastener 11 on the core parts 3, 4 and of these on the PTC element 1.
- the fastener 11 not only serves to apply forces to said components and to secure them to each other, but is also used for electrical contacting of the PTC element 1, the shank 14 of the cylinder screw 12 is surrounded by an insulating sleeve 18 having an electrical Insulation between the fastener 11 and the first core part 3 and the PTC element 1 ensures.
- the fastening element 11 is electrically connected, on the one hand directly in the bore and in particular on the other indirectly via the spring ring 17th
- the insulating sleeve 18 projects laterally beyond the first core part 3 and forms a perforated disc part 19. This creates an electrical insulation between the first core part 3 and the components electrically connected to the fastening element 11, such as the hexagon nut 15 and the toothed disc 16. Between the perforated disc part 19 of the insulating sleeve 18 and the toothed disc 16 is seated a first Jardinringinate 20, which can be electrically contacted via a first cable lug 21. A washer 22 between the sprocket 16 and the first Jardinringinate 20 ensures optimum pressure distribution and optimum electrical contact from the cable lug 21 via the first Jardinringinate 20, the toothed disc 16, the hex nut 15, the cylinder screw 12, and the spring washer 17 in the second core part 4th
- a second Jardinringinate 23 is arranged with a second cable lug 24.
- This second cable eyelet 23 is electrically isolated by means of the insulating sleeve 18 against the fastening element 11 and at the same time is in electrical contact with the first core part 3, since it rests on this. Accordingly, the second core part 3 can be electrically contacted via the second cable lug 24.
- both cable lugs 21, 24 are arranged in the central region of the heating module and both are accessible from above, yet both contact surfaces 9, 10 of the horizontally inserted PTC element 1 can be supplied with electric current.
- FIG. 1 illustrated embodiment has the advantage that a single, centrally arranged fastener 11 both the mechanical cohesion of the heating module and a very good heat dissipation from the PTC element 1 in the heat emitting blocks 5, 6 and beyond a robust and efficient electrical contacting of the PTC element. 1 at an easily accessible location of the heating module.
- This fastener 11 is also easy to install and fix, so that the electric heating module is not only a whole lot easier to assemble than in the prior art, but also has a high efficiency in its operation.
- FIG. 2 is, again in a schematic lateral section, the electric heating module off FIG. 1 represented, so that identical components are provided with identical reference numerals.
- FIG. 2 shows a typical installation situation of the present electric heating module in a vehicle seat to ventilate and / or heat this. Due to the compact and stable design of the electric heating module, this can be easily clipped into a housing 25 by means of snapping detent elements 26, wherein a commercially available fan 27 can be placed in the housing 25 upstream of the heating module. The effective for the air flow 8 surface of the fan 27 corresponds substantially to the heat dissipation region 7 of the electric heating module, while the core 3, 4 of the heating module is covered in projection from the fan motor. The electrical connection for the heating module can be led out of the housing 25 together with the electrical connection of the fan motor.
- FIG. 3 shows a perspective view of the electric heating module FIG. 1 , which is installed in a housing 25, but has not yet been combined with a fan.
- the first heat-emitting block 5 visible here consists of a multiplicity of essentially radially extending lamellae, which, viewed in the direction of flow, are designed as wide "stems" toward the center of the module and extend radially outward taper, but branch radially outward, to increase the number of fins swept by the airflow in the radially outer area of the heat release area.
- FIG. 3 finally clarifies the easy mounting accessibility of the electrical connections for the PTC element 1; the power supply via a two-core cable 28, the two wires are connected to the cable lugs 21, 24.
- the further power line within the heating module is based on the FIG. 1 described in more detail.
- FIG. 3 illustrated design of the heat-emitting block 5 ensures a uniform structuring of the heat-emitting region 7 and provides a large surface area for the exchange of heat with the air stream 8 and low air flow losses.
- the heat-dissipating blocks 5, 6 are in this case pressed around the radius encircling the core parts 3, 4, resulting in an advantageously high thermal conductivity of the core parts 3, 4 in the heat-emitting blocks 5, 6 results.
- FIG. 4 shows in a schematic plan view in the flow direction, a first embodiment of a profile according to the invention, here an extruded profile, said this first embodiment already in the in the FIGS. 1 to 3 shown used electric heating module.
- the extruded profile consists of an internal heat distribution ring 30 contacting the core 3, 4 with the PTC element, from which a plurality of lamellae in the form of stems 31 extend radially outward, soft stems 31 becoming approximately three-quarter of their extent Branches 32 branch.
- the lamellas are not aligned exactly radially, but take a curved course.
- short intermediate blades 33 are arranged to utilize the spaces between the logs 31.
- the described parts of the extruded profile shown are naturally integrally formed integrally formed.
- FIG. 5 an embodiment of a second variant of an inventive formed extruded profile is shown, again a schematic plan view in the flow direction.
- This extruded profile in turn consists radially inwardly of a heat distribution ring 30 from which extends a plurality of fins radially away, each forming a trunk 31, At these stems 31, which do not branch here, a plurality of branches 34 are arranged in each case which extend approximately perpendicular to the main extension direction of the stems 31 and thus penetrate the projection surface of the heat dissipation region 7 regularly.
- FIG. 6 shows a third variant of a profile according to the invention, here again an extruded profile, again in a representation as in the FIGS. 4 and 5 ,
- the variant shown here again has a heat distribution ring 30, but this is not arranged radially inwardly and provided for contacting the core parts 3, 4 and the PTC element 1, but here the bossvertellerring is radially spaced from the core parts 3, 4 and with a A plurality of inner fins 35 are provided, which extend from the heat transfer ring 30, starting radially inwards to the core parts 3, 4 or any other heat source.
- the heat distribution ring 30 is also provided radially outwardly with outwardly extending outer fins 36, the number of which is about twice as large as the number of inner fins 35th
- FIG. 7 Finally, again in a schematic plan view in the flow direction, a variant of an inventive formed extruded profile, which consists of two modules 37, 38. Each of these two modules 37, 38 has a radially distributed inside heat distribution ring 30 and a plurality of radially outwardly extending blades 35, 36th
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Resistance Heating (AREA)
- Direct Air Heating By Heater Or Combustion Gas (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
Die Erfindung betrifft ein elektrisches Heizmodul zur Luftstromerwärmung nach dem Oberbegriff des beigefügten Anspruchs 1 sowie Strangpress-, Guss- oder Extrusionsprofile, die in einem solchen elektrischen Heizmodul verwendet werden können.The invention relates to an electric heating module for air flow heating according to the preamble of the appended
Ein Heizmodul der vorliegenden Art umfasst demnach mindestens ein flächiges PTC-Element mit einer ersten und einer zweiten Kontaktfläche, sowie einen luftdurchströmbaren Wärmeabgabebereich, in dem wärmeleitende Lamellen angeordnet sind, die mit dem PTC-Element in Wirkverbindung stehen. Das PTC-Element ist zwischen einem ersten Teil und einem zweiten Teil eines wärme- und stromleitenden Kerns angeordnet und liegt mit seiner ersten Kontaktfläche am ersten Kernteil sowie mit seiner zweiten Kontaktfläche am zweiten Kernteil an. Das PTC-Element gibt somit Wärme an die beiden Kernteile ab und kann gleichzeitig über die beiden Kernteile elektrisch kontaktiert werden. Der wärme- und stromleitende Kern trägt außerdem die Lamellen, die einen durch den Wärmeabgabebereich strömenden Luftstrom erwärmen.Accordingly, a heating module of the present type comprises at least one planar PTC element with a first and a second contact surface, as well as an airflowable heat dissipation region, in which thermally conductive fins are arranged, which are in operative connection with the PTC element. The PTC element is arranged between a first part and a second part of a heat- and current-conducting core and rests with its first contact surface on the first core part and with its second contact surface on the second core part. The PTC element thus gives off heat to the two core parts and can be electrically contacted simultaneously via the two core parts. The heat and current conducting core also carries the fins which heat a stream of air flowing through the heat dissipation area.
PTC-Elemente sind Halbleiter-Widerstände aus Keramik, deren ohmscher Widerstand temperaturabhängig ist. Die Widerstands-Temperatur-Kennlinie verhält sich nichtlinear: Der Widerstand eines PTC-Heizelements sinkt mit steigender Bauteiltemperatur zunächst leicht, um dann bei einer charakteristischen Temperatur (Referenztemperatur) sehr steil anzusteigen. Dieser insgesamt positive Verlauf der Widerstands-Temperatur-Kennlinie (PTC = Positive Temperature Coefficient) führt dazu, dass ein PTC-Heizelement selbstregelnde Eigenschaften aufweist. Bei einer Temperatur, die deutlich niedriger als die Referenztemperatur liegt, weist das PTC-Heizelement einen niedrigen Widerstand auf, so dass entsprechend hohe Stromstärken durchgeleitet werden können. Wenn für eine gute Wärmeabfuhr von der Oberfläche des PTC-Heizelements gesorgt ist, wird also entsprechend viel elektrische Leistung aufgenommen und als Wärme abgegeben. Steigt die Temperatur des PTC-Heizelements jedoch über die Referenztemperatur, steigt der PTC-Widerstand rasch an, so dass die elektrische Leistungsaufnahme auf einen sehr geringen Wert begrenzt wird. Die Bauteiltemperatur nähert sich dann einem oberen Grenzwert, der abhängig ist von der Wärmeaufnahme der Umgebung des PTC-Heizelements. Unter normalen Umweltbedingungen kann die Bauteiltemperatur des PTC-Heizelements also nicht über eine charakteristische höchste Temperatur ansteigen, selbst wenn die gewollte Wärmeableitung im Störfall völlig unterbrochen wird. Dies und die selbstregelnden Eigenschaften eines PTC-Heizelements, aufgrund deren die aufgenommene elektrische Leistung genau der abgegebenen thermischen Leistung entspricht, prädestiniert PTC-Heizelemente für den Einsatz in Heizungs- bzw. Klimaanlagen von Fahrzeugen oder bei sonstigen Anwendungen von Luftstromerwärmungen in Fahrzeugen oder Wohnbereichen. Denn aus Sicherheitsgründen dürfen in diesen Anwendungsgebieten auch im Störfall keine feuergefährlichen Temperaturen im Heizelement entstehen, wobei gleichwohl im Normalbetrieb eine hohe Heizleistung gefordert wird.PTC elements are semiconductor resistors made of ceramic whose ohmic resistance is temperature-dependent. The resistance-temperature characteristic behaves non-linearly: The resistance of a PTC heating element initially drops slightly with increasing component temperature, then rises very steeply at a characteristic temperature (reference temperature). This overall positive characteristic of the resistance temperature characteristic curve (PTC = Positive Temperature Coefficient) leads to a PTC heating element having self-regulating properties. At a temperature significantly lower than the reference temperature, the PTC heating element has a low resistance, so that correspondingly high currents can be passed through. If for a Good heat dissipation is provided by the surface of the PTC heating element, so a corresponding amount of electrical power is absorbed and released as heat. However, as the temperature of the PTC heater rises above the reference temperature, the PTC resistance increases rapidly, limiting the electrical power consumption to a very low level. The component temperature then approaches an upper limit, which depends on the heat absorption of the surroundings of the PTC heating element. Under normal environmental conditions, the component temperature of the PTC heating element can therefore not rise above a characteristic maximum temperature, even if the desired heat dissipation in case of failure is completely interrupted. This and the self-regulating properties of a PTC heating element, based on which the absorbed electrical power corresponds exactly to the output thermal power, predestined PTC heating elements for use in heating or air conditioning systems of vehicles or other applications of air flow heating in vehicles or residential areas. Because of safety reasons, no flammable temperatures may arise in the heating element in these applications even in case of failure, nevertheless a high heating capacity is required in normal operation.
Zur Innenraumheizung von Kraftfahrzeugen ist es bereits bekannt, elektrische Heizmodule mit einem Rahmen, der eine Mehrzahl von PTC-Heizelementen und daran angrenzenden, luftdurchströmbaren Wärmeabgabebereichen mit wärmeleitenden Lamellen zu einem Modul zusammenfasst, einzusetzen. Ein Beispiel für derartige bekannte elektrische Heizmodule findet sich in der
In der
Die bisher bekannten elektrischen Heizmodule mit PTC-Elementen bestehen in der Regel aus mehreren Lagen von flächig nebeneinander angeordneten, mit ihrer Schmalseite im Luftstrom stehenden PTC-Heizelementen, die an Ihren flachen Oberseiten und ihren Unterseiten jeweils mit Kontaktblechen elektrisch kontaktiert sind. Die daran angrenzenden Wärmeabgabebereiche weisen mäanderförmig angeordnete Metalllamellen auf, die ebenfalls mit ihrer Schmalseite im Luftstrom stehen und an ihrer Breitseite die Koritaktierungsbleche der PTC-Heizelemente in regelmäßigen Abständen für einen Wärmeübergang aufliegend thermisch kontaktieren, Um eine gute Wärmeableitung von den PTC-Heizelementen an die wärmeleitenden Lamellen zu erzielen, können Wärmeleitkleber oder sonstige Verbindungstechniken verwendet werden; es hat sich jedoch als effizienteste Lösung durchgesetzt, die PTC-Heizelemente und die wärmeleitenden Lamellen in einen diese zu einem Modul zusammenfassenden Rahmen zu setzen und innerhalb des Rahmens mindestens ein Federelement vorzusehen, der die abwechselnd angeordneten Wärmeabgabebereiche mit wärmeleitenden Lamellen und die Stege mit den PTC-Heizelementen aufeinander presst.The previously known electric heating modules with PTC elements usually consist of several layers of surface next to each other arranged, with its narrow side in the air flow PTC heating elements, which are electrically contacted at their flat tops and their lower sides with contact plates. The adjoining heat dissipation areas have meandering arranged metal fins, which are also with their narrow side in the air flow and thermally contact the Koritaktierungsbleche the PTC heating elements at regular intervals for heat transfer on its broadside, To a good heat dissipation from the PTC heating elements to the heat-conducting To achieve lamellas, thermal adhesive or other bonding techniques can be used; However, it has become the most efficient solution to put the PTC heating elements and the heat-conducting fins in a module summarizing this frame and to provide within the frame at least one spring element, the alternately arranged heat dissipation areas with thermally conductive fins and the webs with the PTC Heaters pressed together.
Dies bedingt allerdings eine rechteckige Form des elektrischen Heizmoduls mit zeilenartiger Strukturierung der Bauteile, die strömungstechnisch zur Luftstromerwärmung insbesondere dann nicht optimal ist, wenn der Platz für entsprechende luftstromführetide Kanäle wie in einem Kraftfahrzeug nur sehr begrenzt ist. Insofern war es für das Gebläsemodul für Kraftfahrzeugsitze nach der
Darüber hinaus ist die Fertigung der bekannten elektrischen Heizmodule aufgrund ihres mehrschichtigen, federbelasteten Aufbaus innerhalb eines Rahmens kaum maschinell möglich. Es ist vielmehr relativ viel Handarbeit notwendig.In addition, the production of the known electric heating modules due to their multi-layer, spring-loaded structure within a framework hardly possible by machine. Rather, a lot of manual work is necessary.
In der
Ein weiteres Beispiel für ein Gebläsemodul für Kraftfahrzeugsitze ist in der
In der
Die wärmeleitenden Lamellen dieses Standes der Technik nach der
Gleichzeitig ist es für eine effiziente Wärmeabgabe vom PTC-Element in die Kernteile unabdingbar, dass zwischen dem PTC-Element und den Kernteilen eine dauerhafte Anpresskraft wirkt, Aufgrund des oben beschriebenen Verlaufs der Widerstands-Temperatur-Kennlinie des PTC-Elements verringert sich dessen Stromaufnahme, wenn die Wärme nicht effizient abgeführt wird, so dass die Leistung des Heizelements sinkt, wenn die Wärmeübergänge nicht optimal ausgestaltet sind.At the same time it is essential for efficient heat transfer from the PTC element into the core parts, that between the PTC element and the core parts a permanent contact force acts, Due to the above-described history of the resistance-temperature characteristic of the PTC element reduces its power consumption, if the heat is not dissipated efficiently, so that the performance of the heating element decreases, if the heat transfer is not optimally designed.
Im Stand der Technik nach der
Federelemente, die beim Montieren vorgespannt werden müssen und die dafür sorgen, dass Baugruppen des Heizmoduls unter Vorspannung montiert und gehalten werden müssen, verkomplizieren jedoch die Montage und machen in aller Regel Handarbeit notwendig, Insbesondere im Zusammenhang mit der erwähnten geringen Eigenstabilität von Lamellenpaketen aus gebogenen und gekanteten Metallblechen bereiten die Kräfte, die beim Montieren zur Vorspannung der Federelemente aufgebracht werden müssen, besondere Schwierigkeiten bei der Montage.However, spring elements that must be biased during assembly and ensure that assemblies of the heating module must be mounted and held under bias, complicate the assembly and make usually manual work necessary, Especially in connection with the aforementioned low intrinsic stability of disc packs of curved and folded metal sheets prepare the forces that must be applied when mounting for biasing the spring elements, special difficulties during installation.
Ausgehend von diesem Stand der Technik liegt der vorliegenden Erfindung die Aufgabe zugrunde, die Montagefreundlichkeit eines elektrischen Heizmoduls der vorliegenden Art durch konstruktive Modifikationen zu verbessern.Based on this prior art, the present invention seeks to improve the ease of installation of an electric heating module of the present type by constructive modifications.
Gelöst ist diese Aufgabe durch ein elektrisches Heizmodul mit den Merkmalen des beigefügten Anspruchs 1. Bevorzugte Ausgestaltungen des erfindungsgemäßen Heizmoduls sind in den Ansprüchen 2 bis 11 niedergelegt, Strangpress-, Guss- oder Extrusionsprofile, die in einem erfindungsgemäßen elektrischen Heizmodul verwendet werden können, finden sich in den Ansprüchen 12 bis 17.This object is achieved by an electric heating module with the features of the attached
Die vorliegende Erfindung macht Federelemente und Montagearbeiten mit vorgespannten Baugruppen überflüssig, denn erfindungsgemäß ist ein Befestigungselement vorhanden, das den ersten Kernteil, das PTC-Element und den zweiten Kernteil durchgreift und aneinander festlegt, insbesondere mittels zueinander fluchtenden Bohrungen in diesen Bauteilen. Ein solches Befestigungselement kann aus einer Schrauben-Mutter-Kombination bestehen; es sind jedoch auch sämtliche anderen Befestigungsarten, wie beispielsweise eine Nietverbindung, eine Steckverbindung mit Sicherungsringen oder Splinten etc. im Rahmen der vorliegenden Erfindung als Befestigungselement einsetzbar. Besonders einfach zu montieren ist hierbei naturgemäß eine Schraubverbindung.The present invention makes spring elements and assembly work with prestressed assemblies superfluous, because according to the invention a fastener is present, which passes through the first core part, the PTC element and the second core part and fixed to each other, in particular by means of mutually aligned holes in these components. Such a fastener may consist of a screw-nut combination; However, there are also all other types of attachment, such as a rivet connection, a connector with retaining rings or cotter pins, etc. in the context of the present invention can be used as a fastener. Naturally, a screw connection is particularly easy to assemble.
Um mögliche thermische Spannungen sowie mechanische Belastungen ausgleichen zu können, ist es bevorzugt, das Befestigungselement mit einem Federelement zu versehen, das den ersten Kernteil, das PTC-Element und den zweiten Kernteil elastisch gegeneinander vorspannt. Dieses Federelement kann in das Befestigungselement integriert sein oder als Federscheibe, weichelastische Beschichtung und dergleichen irgendwo zwischen den beteiligten Bauteilen angeordnet sein.In order to be able to compensate for possible thermal stresses and mechanical loads, it is preferable to provide the fastening element with a spring element which biases the first core part, the PTC element and the second core part elastically against each other. This spring element can be integrated in the fastening element or be arranged as a spring washer, soft elastic coating and the like somewhere between the components involved.
Mittels des erfindungsgemäßen Befestigungselements sind die beiden Kernteile und das PTC-Element stabil und mit einer definierten Vorspannung sowie mit einer dementsprechend guten Wärmeableitung vom PTC-Element in die Kernteile dauerhaft aneinander festgelegt, so dass sich diese Baugruppe besonders leicht montieren lässt. Durch diese Ausgestaltung kann außerdem ein Gehäuse, in das das vorliegende elektrische Heizmodul vorzugsweise zusammen mit einem Lüfter eingebaut wird, von Haltekräften und Gegenkräften freigehalten werden, die von Federelementen herrühren, welche im Stand der Technik verwendet worden sind. Das erfindungsgemäße elektrische Heizmodul kann also ganz einfach in ein Gehäuse eingelegt oder über eine Schnappverbindung eingeklickt werden, was die Montage eines Heizmoduls mit Gehäuse und Lüfter, wie man es beispielsweise in Fahrzeugsitzen zur Heizung und Belüftung derselben einbaut, nochmals entscheidend vereinfacht.By means of the fastening element according to the invention, the two core parts and the PTC element are stable and permanently fixed to one another with a defined preload and with a correspondingly good heat dissipation from the PTC element into the core parts, so that this assembly is particularly easy to assemble. By virtue of this configuration, moreover, a housing into which the present electrical heating module is preferably installed together with a fan can be kept free from holding forces and counterforce resulting from spring elements which have been used in the prior art. The electrical heating module according to the invention can therefore be easily inserted into a housing or clicked over a snap connection Be what the installation of a heating module with housing and fan, as it is installed, for example, in vehicle seats for heating and ventilation of the same, again significantly simplifies.
Nach einer besonders bevorzugten Weiterbildung der vorliegenden Erfindung ist das Befestigungselement elektrisch leitend ausgebildet und dient als Stromzuführung zu entweder dem ersten oder dem zweiten Kernteil. Hierzu sitzt es vorzugsweise in einer elektrisch isolierenden Hülse, die sich zumindest über eines der beiden Kernteile und das PTC-Element hinweg erstreckt. Das PTC-Element kann dann von nur einer Seite her elektrisch kontaktiert werden. Beispielsweise wird eine erste elektrische Zuleitung mit dem ersten Kernteil verbunden, und eine zweite elektrische Zuleitung mit dem gegen den ersten Kernteil elektrisch isolierten Befestigungselement. Dieses steht in elektrisch leitender Verbindung mit dem zweiten Kernteil, so dass das PTC-Element über die beiden jeweils an einem Kernteil anliegenden Oberflächen elektrisch kontaktiert wird, obwohl die Zuleitungen vorteilhafterweise innerhalb der Projektionsfläche des PTC-Elements und radial innerhalb des Wärmeabgabebereichs verlaufen, also nur entweder an der stromaufwärtigen oder der stromabwärtigen Seite des PTC-Elements angeordnet sind und den Wärmeabgabebereich nicht abschatten..According to a particularly preferred embodiment of the present invention, the fastening element is electrically conductive and serves as a power supply to either the first or the second core part. For this purpose, it preferably sits in an electrically insulating sleeve, which extends at least over one of the two core parts and the PTC element away. The PTC element can then be electrically contacted from only one side. By way of example, a first electrical lead is connected to the first core part, and a second electrical lead is connected to the fastening element, which is electrically insulated from the first core part. This is in electrically conductive connection with the second core part, so that the PTC element is electrically contacted via the two adjacent respectively on a core part surfaces, although the leads advantageously within the projection surface of the PTC element and radially within the heat dissipation area, so only are located either on the upstream or the downstream side of the PTC element and do not shade the heat release area.
Die elektrische Kontaktierung wird vorzugsweise dadurch nochmals vereinfacht, dass die Hülse, die das Befestigungselement elektrisch isolierend umgibt, außerhalb der Bohrungen der Kernteile und des PTC-Elements in eine Scheibe auskragt, die zwischen zwei elektrischen Kontaktelementen, insbesondere Kabelringhülsen, angeordnet ist und diese elektrisch voneinander trennt. Ein erstes dieser beiden elektrischen Kontaktelemente sitzt dann zwischen der auskragenden Scheibe und dem ersten Kernteil, so dass hierdurch der erste Kernteil kontaktiert wird, während das zweite elektrische Kontaktelement zwischen der Scheibe und dem sichernden bzw. auskragenden Teil des Befestigungselements sitzt. Dieser auskragende Teil kann, je nach Art des Befestigungselements, eine Mutter, ein Schraubenkopf, ein Niet, eine Unterlegscheibe, eine Distanzscheibe, ein Splint oder dergleichen sein.The electrical contact is preferably further simplified in that the sleeve which surrounds the fastening element electrically insulating, protrudes outside the bores of the core parts and the PTC element in a disc which is arranged between two electrical contact elements, in particular cable ferrules, and these electrically from each other separates. A first of these two electrical contact elements then sits between the cantilevered disc and the first core part, so that in this way the first core part is contacted, while the second electrical contact element sits between the disc and the securing or projecting part of the fastening element. Depending on the type of fastener, this projecting part may be a nut, a screw head, a rivet, a washer, a spacer, a split pin, or the like.
Nach einer weiteren besonders bevorzugten Ausführungsform des erfindungsgemäßen Heizmoduls sind die wärmeleitenden Lamellen nicht mehr, wie im bisherigen Stand der Technik, als gebogene und abgekantete Metallbleche gefertigt, sondern als Strangpressprofil hergestellt, insbesondere aus Aluminium oder Aluminiumlegierungen, die eigenstabil und besonders gut wärmeleitend sind. Insbesondere ist es vorteilhaft, das Strangpressprofil so zu fertigen, dass es den gesamten Wärmeabgabebereich als einstückig gefertigter Wärmeabgabeblock überdeckt. Dies erhöht die Eigenstabilität dieses Bauteils und vereinfacht die Montage, da es dann nur noch mit dem Kern bzw. einem der beiden Kernteile zusammengesteckt und dort gegebenenfalls verpresst werden muss.According to a further particularly preferred embodiment of the heating module according to the invention, the heat-conducting fins are no longer made, as in the prior art, as bent and folded metal sheets, but made as an extruded profile, in particular of aluminum or aluminum alloys, which are inherently stable and particularly good heat conducting. In particular, it is advantageous to manufacture the extruded profile in such a way that it covers the entire heat dissipation area as an integral heat dissipation block. This increases the inherent stability of this component and simplifies the assembly, since it then only has to be plugged together with the core or one of the two core parts and possibly compressed there.
Im Rahmen der vorliegenden Erfindung kann anstatt eines Strangpressprofils, das insbesondere aus Aluminium oder einer Aluminiumlegierung besteht, jedoch auch aus anderen wärmeleitenden Materialien bestehen kann, auch ein Gussprofil, beispielsweise hergestellt im Druckgussverfahren, im Spritzgießverfahren oder anderen Gießverfahren, sowie ein Extrusionsprofil eingesetzt werden, wobei für letzteres insbesondere wärmeleitende Kunststoffe zum Einsatz kommen können.In the context of the present invention, instead of an extruded profile, which consists in particular of aluminum or an aluminum alloy, but may also consist of other thermally conductive materials, a cast profile, for example produced by die casting, injection molding or other casting method, and an extrusion profile can be used, wherein for the latter in particular thermally conductive plastics can be used.
Vorzugsweise sitzt ein erstes Strangpress-, Guss- oder Extrusionsprofil auf dem ersten Kernteil und ein zweites Profil auf dem zweiten Kernteil.Preferably, a first extrusion, casting or extrusion profile sits on the first core part and a second profile on the second core part.
Ein solches Strangpress-, Guss- oder Extrusionsprofil hat mehrere Vorteile: Hierzu gehört die Möglichkeit, durch umlaufendes Verpressen mit dem jeweils zugehörigen Kernteil einen optimalen Wärmeübergang zwischen dem Kernteil und dem Wärmeabgabebereich zu schaffen, Des weiteren ist es möglich und bevorzugt, die wärmeleitenden Lamellen des Strangpressprofils so auszugestalten, dass deren Querschnitt in Strömungsrichtung sich mit zunehmender Entfernung vom Kern verringert, was die Effizienz der Wärmeleitung innerhalb der Lamellen und die Effizienz der Wärmeabgabe von den Lamellen an den durchströmenden Luftstrom erhöht.Such an extrusion, casting or extrusion profile has several advantages: This includes the ability to create by circulating pressing with the respective core part an optimal heat transfer between the core part and the heat dissipation area, Furthermore, it is possible and preferred, the heat-conducting fins of the To design extruded profiles so that their cross section in the flow direction decreases with increasing distance from the core, which increases the efficiency of the heat conduction within the slats and the efficiency of the heat transfer from the slats to the air flow flowing through.
Die Effizienz der Wärmeabgabe von den Lamellen an den durchströmenden Luftstrom kann vorteilhafterweise auch dadurch erhöht werden, dass die wärmeleitenden Lamellen eine im Wesentlichen schwarze Oberfläche aufweisen. Soweit die Lamellen aus Aluminium oder einer Aluminiumlegierung bestehen, kann dies zweckmäßigerweise im Eloxierverfahren erfolgen, so dass die wärmeleitenden Lamellen eine schwarz eloxierte Oberfläche aufweisen.The efficiency of the heat transfer from the lamellae to the air flow flowing through can advantageously also be increased by virtue of the fact that the heat-conducting lamellae have a substantially black surface. Insofar as the lamellae are made of aluminum or an aluminum alloy, this can expediently be carried out in the anodizing process, so that the heat-conducting lamellae have a black anodized surface.
Schließlich ist es möglich und bevorzugt, die wärmeleitenden Lamellen solcherart zu formen, dass sie vom Kern ausgehend einen Stamm bilden und dieser Stamm sich mit zunehmender Entfernung vom Kern mindestens einmal in zwei oder mehr Zweige verzweigt. Hierdurch lässt sich der Wärmeabgabebereich gleichmäßig strukturieren, eine besonders große Oberfläche der wärmeleitenden Lamellen schaffen, an denen der Wärmetransport in den Luftstrom erfolgt, und besonders geringe Luftströmungsverluste erzielen. Dies erhöht den Wärmeübergang, verbessert die Reaktionszeit und Effizienz des Heizmoduls und reduziert Luftströmungsgeräusche. Des weiteren können kleinere Lüfter bei gleicher Wirkung verwendet werden.Finally, it is possible and preferred to shape the thermally conductive fins such that they form a stem from the core and this strain branches at least once into two or more branches as it is removed from the core. As a result, the heat release region can be structured uniformly, create a particularly large surface area of the heat-conducting lamellae, at which the heat transport into the air flow occurs, and achieve particularly low air flow losses. This increases the heat transfer, improves the response time and efficiency of the heating module and reduces airflow noise. Furthermore, smaller fans can be used for the same effect.
Die vorliegende Erfindung ermöglicht insgesamt also eine Achsmontage eines elektrischen Heizmoduls mit sandwichartigem Aufbau mit einem zentralen Befestigungselement, das das PTC-Element gleichzeitig elektrisch kontaktiert. Der Wärmeabgabebereich kann hierbei, wie auch das PTC-Element und die Kernteile, in Durchströmungsrichtung gesehen, kreisrund, abgeflacht bzw. oval oder auch polygonförmig, beispielsweise rechteckig oder trapezförmig ausgebildet sein.The present invention thus makes possible overall axle mounting of an electrical heating module with a sandwich-like construction with a central fastening element which simultaneously electrically contacts the PTC element. The heat dissipation region can here, as well as the PTC element and the core parts, viewed in the flow direction, circular, flattened or oval or polygonal, for example rectangular or trapezoidal.
Die vorliegende Erfindung umfasst außerdem Strangpress-, Guss- oder Extrusionsprofile mit wärmeleitenden Lamellen, die insbesondere zur Verwendung in einem Wärmeabgabebereich eines erfindungsgemäßen elektrischen Heizmoduls vorgesehen sind, also im Rahmen der vorliegenden Erfindung Teil eines solchen elektrischen Heizmoduls sein können; gleichzeitig können die erfindungsgemäßen Profile jedoch auch anderweitig verwendet werden. Wie erwähnt, sind im Rahmen der vorliegenden Erfindung unter Strangpress-, Guss- und Extrusionsprofilen Profile zu verstehen, die in irgendeinem Gießverfahren, wie insbesondere Druckguss und Spritzguss, oder auch in einem Strangpress- oder Extrusionsverfahren hergestellt worden sind. Als Materialien kommen hierfür alle gießbaren und/oder extrudierbaren, wärmeleitenden Materialien in Frage, wie insbesondere Aluminium und Aluminiumlegierungen, jedoch auch andere Metalle wie beispielsweise Kupfer und Kupferlegierungen, oder auch wärmeleitende Kunststoffe und Keramikwerkstoffe. In allen Fällen ist es im Rahmen der vorliegenden Erfindung bevorzugt, wenn die wärmeleitenden Lamellen des Profils eine im Wesentlichen schwarze, insbesondere schwarz eloxierte Oberfläche aufweisen. Dies verbessert den Wärmeübergang in den vorbeiströmenden Luftstrom.The present invention also includes extruded, cast or extruded profiles with thermally conductive fins, which are intended in particular for use in a heat-emitting region of an electric heating module according to the invention, that can be part of such an electric heating module in the context of the present invention; At the same time, however, the profiles according to the invention can also be used elsewhere. As mentioned, are in the context of the present invention under extrusion, casting and extrusion profiles To understand profiles that have been produced in any casting process, such as in particular die casting and injection molding, or in an extrusion or extrusion process. Suitable materials for this are all castable and / or extrudable, heat-conducting materials in question, in particular aluminum and aluminum alloys, but also other metals such as copper and copper alloys, or else heat-conductive plastics and ceramic materials. In all cases, it is preferred in the context of the present invention if the heat-conducting lamellae of the profile have a substantially black, in particular black anodized surface. This improves the heat transfer in the passing air stream.
Ein erstes erfindungsgemäßes Profil weist wärmeleitende Lamellen auf, von denen wenigstens eine Teilmenge jeweils solcherart geformt ist, dass die Lamellen vom Kern ausgehend einen sich im Wesentlichen radial nach außen erstreckenden Stamm bilden, und dieser Stamm sich mit zunehmender Entfernung vom Kern mindestens einmal in zwei oder mehr Zweige verzweigt. Hierbei kann sich mit zunehmender Entfernung vom Kern der die Durchströmung abschattende Querschnitt der einzelnen Lamellen verringern. Dies ist hinsichtlich der Wärmeleitung innerhalb der Lamellen nicht dachteil, da die Menge der durchzuleitenden Wärme radial nach außen abnimmt, während es wegen der sich zunehmend verringernden Abschattung der durchströmbaren Projektionsfläche strömungstechnische Vorteile mit sich bringt. Gleichzeitig vergrößert sich durch die Verzweigung die Wärmeübertragungsfläche von den Lamellen zum Luftstrom, was den Wärmeübergang in den Luftstrom signifikant verbessert. Schließlich sorgt die Verzweigung und die Durchdringung des Wärmeabgabebereichs mit wärmeleitenden Lamellen bzw. Zweigen für eine im Wesentlichen laminare Durchströmung des Wärmeabgabebereichs, was wiederum strömungstechnisch vorteilhaft ist.A first profile according to the invention comprises heat-conducting lamellae, of which at least one subset is in each case shaped in such a way that the lamellae form a stem which extends essentially radially outwards from the core, and this trunk becomes at least once in two or more as the distance from the core increases more branches branches. In this case, with increasing distance from the core of the flow shading cross-section of the individual slats can be reduced. This is not roof part in terms of heat conduction within the slats, since the amount of heat to be transmitted decreases radially outward, while it brings because of the increasingly decreasing shading of the flow-through projection surface aerodynamic advantages. At the same time, the branch increases the heat transfer surface from the fins to the air flow, which significantly improves the heat transfer into the air flow. Finally, the branching and the penetration of the heat-dissipating area with heat-conducting lamellae or branches ensures a substantially laminar flow through the heat-dissipating area, which in turn is advantageous in terms of flow.
Ein zweites Strangpress-, Guss- oder Extrusionsprofil nach der vorliegenden Erfindung besitzt wenigstens eine Teilmenge von wärmeleitenden Lamellen, die solcherart geformt sind, dass sie einen sich im Wesentlichen radial vom Kern weg erstreckenden Stamm bilden, an den eine Mehrzahl von im Wesentlichen senkrecht zur Haupterstreckungsrichtung des Stammes aus diesem hervorgehenden Ästen angeformt ist. Diese Äste sind bevorzugt mit zunehmender Entfernung vom Kern zunehmend länger ausgebildet, so dass sie eine möglichst große Fläche des Wärmeabgabebereichs durchdringen. Die Vorteile und Wirkungen dieser Ausgestaltung entsprechen in etwa denjenigen des oben beschriebenen Profils mit Lamellen, die einen Stamm mit Zweigen bilden.A second extrusion, casting or extrusion profile according to the present invention has at least a subset of thermally conductive fins formed to form a stem extending substantially radially away from the core, to which a plurality of substantially is formed perpendicular to the main extension direction of the trunk from this forthcoming branches. These branches are preferably formed progressively longer with increasing distance from the core, so that they penetrate the largest possible area of the heat dissipation area. The advantages and effects of this embodiment correspond approximately to those of the profile described above with lamellae forming a trunk with branches.
Ein drittes Profil nach der vorliegenden Erfindung besitzt einen Wärmeverteilerring, der vom Kern radial beabstandet um diesen umläuft, und der mit sich radial nach innen bis zum Kern erstreckenden wärmeleitenden Lamellen versehen ist. Bevorzugt ist der Wärmeverteilerring auch radial nach außen mit wärmeleitenden Lamellen versehen. Der Wärmeverteilerring kann hierbei geschlossen sein, dies ist jedoch nicht in jedem Fall notwendig.A third profile according to the present invention has a heat spreader ring radially spaced around the core and provided with heat conductive fins extending radially inwardly to the core. Preferably, the heat distribution ring is also provided radially outwardly with heat-conducting fins. The heat distribution ring may be closed, but this is not always necessary.
Eine besonders bevorzugte Variante eines erfindungsgemäßen Profils besteht aus mindestens zwei Modulen, die zusammengesetzt werden können, wobei ein erstes Modul den Kern umgibt und wärmeleitend mit diesem verbunden ist, und ein zweites Modul so an das erste Modul anbringbar ist, dass es dieses umgibt und mit diesem wärmeleitend verbunden wird. Gegebenenfalls sind noch dritte und vierte Module usw. vorhanden, die jeweils radial außen angesetzt werden können, um den Wärmabgabebereich zu vergrößern. Dies ermöglicht, den Wärmeabgabebereich an verschiedene Lüfterdurchmesser anzupassen, die am elektrischen Heizmodul angebracht werden können und mit diesem einen Heizlüfter bilden.A particularly preferred variant of a profile according to the invention consists of at least two modules, which can be assembled, wherein a first module surrounds the core and is thermally conductively connected thereto, and a second module is attachable to the first module so that it surrounds and with this is thermally conductively connected. Optionally, there are still third and fourth modules, etc., which can be applied radially outward to increase the heat dissipation area. This makes it possible to adapt the heat dissipation area to different fan diameters, which can be attached to the electric heating module and form with it a heating fan.
An dieser Stelle sei nochmals darauf hingewiesen, dass die erfindungsgemäßen Strangpress-, Guss- oder Extrusionsprofile bevorzugt in Projektion kreisrund ausgebildet sind, dies jedoch nicht sein müssen. Im Rahmen der vorliegenden Erfindung liegen vielmehr auch Profile, die in ihrer Projektion polygonförmig, beispielsweise rechteckig, oder oval bzw. abgeflacht sind. Dies gilt insbesondere auch für das erfindungsgemäße Profil mit Wärmeverteilerring. Des Weiteren können die unterschiedlichen, oben beschriebenen Varianten von Profilen im Rahmen der vorliegenden Erfindung auch kombiniert werden.At this point, it should again be noted that the extruded, cast or extrusion profiles according to the invention are preferably formed in a circular projection, but this need not be. In the context of the present invention are rather also profiles that are polygonal in their projection, for example rectangular, or oval or flattened. This is especially true for the inventive profile with heat distribution ring. Furthermore, the different variants of profiles described above can also be combined in the context of the present invention.
Ein Ausführungsbeispiel für ein erfindungsgemäßes elektrisches Heizmodul und Ausführungsbeispiele für erfindungsgemäß ausgestaltete Profile werden im Folgenden anhand der beigefügten Zeichnungen näher beschrieben und erläutert. Es zeigen:
Figur 1- eine schematische seitliche Schnittdarstellung durch ein erfindungsgemäß aufgebautes elektrisches Heizmodul;
Figur 2- eine
Darstellung wie Figur 1 , wobei das Heizmodul zusammen mit einem Lüfter in ein Gehäuse eingebaut ist; Figur 3- eine perspektivische Darstellung der Baugruppe aus
Figur 2 ; Figur 4- eine schematische Draufsicht auf ein erstes Ausführungsbeispiel eines Profils, hier eines Strangpressprofils;
Figur 5- eine schematische Draufsicht auf ein zweites Ausführungsbeispiel eines Profils;
Figur 6- eine schematische Draufsicht auf ein dritten Ausführungsbeispiel eines Profils;
- Figur 7
- eine schematische Draufsicht auf ein viertes Ausführungsbeispiel eines Profils;
- FIG. 1
- a schematic side sectional view through an inventively constructed electric heating module;
- FIG. 2
- a representation like
FIG. 1 wherein the heating module is installed together with a fan in a housing; - FIG. 3
- a perspective view of the assembly
FIG. 2 ; - FIG. 4
- a schematic plan view of a first embodiment of a profile, here an extruded profile;
- FIG. 5
- a schematic plan view of a second embodiment of a profile;
- FIG. 6
- a schematic plan view of a third embodiment of a profile;
- FIG. 7
- a schematic plan view of a fourth embodiment of a profile;
Das in
Auf den ersten Kernteil 3 aufgesetzt, befindet sich ein erster Wärmeabgabeblock 5, der aus einem Aluminium-Strangpressprofil besteht, welches den ersten Kernteil 3 kreisrund umgebend, eine Vielzahl von im Wesentlichen radial verlaufenden, wärmeleitenden Lamellen bildet. Diese werden später anhand
Das flächig ausgebildete PTC-Element 1 besitzt an der Oberseite eine erste Kontaktfläche 9 und an seiner Unterseite eine zweite Kontaktfläche 10, wobei diese beiden Kontaktflächen 9, 10 sowohl zur elektrischen Kontaktierung des PTC-Elements 1 als auch zur Wärmeableitung verwendet werden. Hierzu liegen die erste Kontaktfläche 9 am ersten Kernteil 3 und die zweite Kontaktfläche 10 am zweiten Kernteil 4 an. Um insbesondere eine gute Wärmeableitung von den Kontaktflächen 9, 10 zu gewährleisten, werden der erste Kernteil 3, das PTC-Element 1 und der zweite Kernteil 4 von einem Befestigungselement 11 gegeneinander vorgespannt zusammengehalten. Wie ersichtlich, durchgreift dieses Befestigungselement die genannten drei Bauteile 1, 3, 4, im vorliegenden Ausführungsbeispiel mittels zentraler Bohrungen; das PTC-Element 1 liegt hier demnach in Form einer Lochscheibe vor.The
Das Befestigungselement 11 besteht im vorliegenden Ausführungsbeispiel aus einer Zylinderschraube 12 mit einem Kopf 13 mit Innenvierkant und einem Schaft 14, der die Bohrungen in den beiden Kernteilen 3, 4 und dem PTC-Element 1 durchgreift. Auf das (nicht explizit dargestellte) Gewinde der Zylinderschraube 12 ist eine Sechskantmutter 15 aufgeschraubt und mittels einer Zahnscheibe 16 gesichert. Eine Federscheibe 17 zwischen dem Kopf 13 der Zylinderschraube 12 und dem zweiten Kernteil 4 sorgt für eine dauerhafte, definierte Vorspannkraft, die vom Befestigungselement 11 auf die Kernteile 3, 4 sowie von diesen auf das PTC-Element 1 ausgeübt wird.The
Da das Befestigungselement 11 nicht nur zum Aufbringen von Kräften auf die genannten Bauteile und zum Befestigen derselben aneinander dient, sondern auch zur elektrischen Kontaktierung des PTC-Elements 1 verwendet wird, ist der Schaft 14 der Zylinderschraube 12 von einer Isolierhülse 18 umgeben, die eine elektrische Isolierung zwischen dem Befestigungselement 11 und dem ersten Kernteil 3 sowie dem PTC-Element 1 sicherstellt. Mit dem zweiten Kernteil 4 ist das Befestigungselement 11 elektrisch leitend verbunden, und zwar zum einen direkt in der Bohrung und insbesondere zum anderen indirekt über den Federring 17.Since the
Die Isolierhülse 18 kragt oberhalb des ersten Kernteils 3 seitlich aus und bildet einen Lochscheibenteil 19. Dieser schafft eine elektrische Isolierung zwischen dem ersten Kernteil 3 und den mit dem Befestigungselement 11 elektrisch leitend verbunden Bauteilen, wie der Sechskantmutter 15 und der Zahnscheibe 16. Zwischen dem Lochscheibenteil 19 der Isolierhülse 18 und der Zahnscheibe 16 sitzt eine erste Kabelringöse 20, die über einen ersten Kabelschuh 21 elektrisch kontaktiert werden kann. Eine Unterlegscheibe 22 zwischen der Zahnscheibe 16 und der ersten Kabelringöse 20 gewährleistet eine optimale Druckverteilung und einen optimalen elektrischen Kontakt vom Kabelschuh 21 über die erste Kabelringöse 20, die Zahnscheibe 16, die Sechskantmutter 15, die Zylinderschraube 12, und die Federscheibe 17 in den zweiten Kernteil 4.The insulating
Unterhalb des Lochscheibenteils 19 der Isolierhülse 18 ist eine zweite Kabelringöse 23 mit einem zweiten Kabelschuh 24 angeordnet. Diese zweite Kabelringöse 23 ist mittels der Isolierhülse 18 elektrisch gegen das Befestigungselement 11 isoliert und steht gleichzeitig in elektrischem Kontakt mit dem ersten Kernteil 3, da sie auf diesem aufliegt. Über den zweiten Kabelschuh 24 kann demnach der zweite Kernteil 3 elektrisch kontaktiert werden. Obwohl beide Kabelschuhe 21, 24 im zentralen Bereich des Heizmoduls angeordnet sind und beide von oben zugänglich sind, können dennoch beide Kontaktflächen 9, 10 des horizontal eingelegten PTC-Elements 1 mit elektrischem Strom versorgt werden.Below the
Gleichzeitig bietet das in
In
Das in
In
Die Besonderheit besteht nun darin, dass das erste Modul 37 zur Kontaktierung von Kernteilen 3, 4 mit einem PTC-Element dient. Das zweite Modul 38 kann einfach auf das erste Modul 37 aufgesetzt werden, um den Wärmeabgabebereich 7 zu vergrößern und so beispielsweise an einen größeren Lüfter anzupassen. Der Wärmeübergang zwischen dem ersten Modul 37 und dem zweiten Modul 38 ist über den Wärmeverteilerring 30 des zweiten Moduls 38 gewährleistet,
- 1.
- PTC-Element
- 2.
- Dichtungsring
- 3,
- Kernteil (erster)
- 4.
- Kernteil (zweiter)
- 5.
- Wärmeabgabeblock (erster)
- 6.
- Wärmeabgabeblock (zweiter)
- 7.
- Wärmeabgabebereich
- 8.
- Luftstrom
- 9.
- Kontaktfläche (
von 1, erste) - 10.
- Kontaktfläche (
von 1, zweite) - 11.
- Befestigungselement
- 12.
- Zylinderschraube
- 13.
- Innenvierkant (von 12)
- 14.
- Schaft (von 12)
- 15.
- Sechskantmutter
- 16.
- Zahnscheibe
- 17.
- Federscheibe
- 18.
- Isolierhülse
- 19.
- Lochscheibenteil (von 18)
- 20.
- Kabelringöse (erste)
- 21.
- Kabelschuh (erster)
- 22.
- Unterlegscheibe
- 23.
- Kabelringöse (zweite)
- 24.
- Kabelschuh (zweiter)
- 25.
- Gehäuse
- 26.
- Rastelemente
- 27.
- Lüfter
- 28.
- Kabel
- 29.
- Befestigungsflansche
- 30.
- Wärmeverteilerring
- 31.
- Stamm
- 32.
- Zweige
- 33.
- Zwischentarnellen
- 34.
- Äste
- 35.
- innere Lamellen
- 36.
- äußere Lamellen
- 37.
- Modul (erstes)
- 38.
- Modul (zweites)
- 1.
- PTC element
- Second
- sealing ring
- 3,
- Core part (first)
- 4th
- Core part (second)
- 5th
- Heat output block (first)
- 6th
- Heat output block (second)
- 7th
- Heat-dissipating area
- 8th.
- airflow
- 9th
- Contact area (from 1, first)
- 10th
- Contact area (from 1, second)
- 11th
- fastener
- 12th
- cylinder head screw
- 13th
- Inner square (from 12)
- 14th
- Shank (of 12)
- 15th
- Hex nut
- 16th
- toothed washer
- 17th
- spring washer
- 18th
- insulating sleeve
- 19th
- Perforated disc part (from 18)
- 20th
- Cable eyelet (first)
- 21st
- Cable lug (first)
- 22nd
- washer
- 23rd
- Cable eyelet (second)
- 24th
- Cable lug (second)
- 25th
- casing
- 26th
- locking elements
- 27th
- Fan
- 28th
- electric wire
- 29th
- mounting flanges
- 30th
- Heat distribution ring
- 31st
- tribe
- 32nd
- branches
- 33rd
- Zwischentarnellen
- 34th
- branches
- 35th
- inner fins
- 36th
- outer fins
- 37th
- Module (first)
- 38th
- Module (second)
Claims (17)
dadurch gekennzeichnet,
characterized,
dadurch gekennzeichnet,
dass das Befestigungselement (11) elektrisch leitend ausgebildet ist und als Stromzuführung zu entweder dem ersten (3) oder dem zweiten Kernteil (4) dient.Electric heating module according to claim 1,
characterized,
that the fastening element (11) is electrically conductive and serves as a power supply to either of the first (3) or the second core portion (4).
dadurch gekennzeichnet,
dass das Befestigungselement (11) mit einem Federelement versehen ist, das den ersten Kernteil (3), das PTC-Element (1) und den zweiten Kernteil (4) elastisch gegeneinander vorspannt.Electric heating module according to one of claims 1 or 2,
characterized,
in that the fastening element (11) is provided with a spring element which elastically biases the first core part (3), the PTC element (1) and the second core part (4) against one another.
dadurch gekennzeichnet,
dass das Befestigungselement (11) in einer elektrisch isolierenden Hülse (18) sitzt, die sich zumindest über einen der beiden Kernteile (3, 4) und das PTC-Element (1) erstreckt.Electric heating module according to claims 2 and 3,
characterized,
that the fastening element (11) in an electrically insulating sleeve (18) sits, which extends at least over one of the two core parts (3, 4) and the PTC element (1).
dadurch gekennzeichnet,
dass die Hülse (18) außerhalb der Bohrungen in eine Scheibe (19) auskragt, die zwischen zwei elektrischen Kontaktelementen (20, 23) angeordnet ist und diese elektrisch voneinander trennt, wobei ein erstes der beiden elektrischen Kontaktelemente (20) zwischen der Scheibe (19) und dem ersten Kernteil (3) und ein zweites der beiden elektrischen Kontaktelemente (23) zwischen der Scheibe (19) und einem auskragenden Teil (15) des Befestigungselements (11) sitzt.Electric heating module according to claim 4,
characterized,
in that the sleeve (18) projects outside the bores into a disc (19) which is arranged between two electrical contact elements (20, 23) and electrically separates them from one another, a first of the two electrical contact elements (20) being arranged between the disc (19 ) and the first core part (3) and a second of the two electrical contact elements (23) between the disc (19) and a projecting part (15) of the fastening element (11) sits.
dass die wärmeleitenden Lamellen (5, 6) einstückig oder mehrstückig als Strangpress-, Guss- oder Extrusionsprofil gefertigt sind.Electric heating module according to at least one of claims 1 to 5, characterized
that the heat-conducting blades (5, 6) are in one piece or in multiple pieces manufactured as extrusion, casting or extrusion profile.
dadurch gekennzeichnet,
dass ein Strangpress-, Guss- oder Extrusionsprofil den Wärmeabgabebereich (7) als einstückig gefertigter Wärmeabgabeblock (5, 6) abdeckt.Electric heating module according to claim 6,
characterized,
that an extruded, cast or extrusion profile the heat release area (7) as one piece-made heat output block (5, 6) covers.
dadurch gekennzeichnet,
dass ein erstes Profil (5) auf den ersten Kernteil (3) und ein zweites Profil (6) auf den zweiten Kernteil (4) gesetzt ist.Electric heating module according to one of claims 6 or 7,
characterized,
in that a first profile (5) is placed on the first core part (3) and a second profile (6) on the second core part (4).
dass wenigstens eine Teilmenge der wärmeleitenden Lamellen (5, 6) solcherart geformt ist, dass die Lamellen (5, 6) vom Kern, (3, 4) ausgehend einen Stamm (31) bilden und dieser Stamm sich mit zunehmender Entfernung vom Kern (3, 4) mindestens einmal in zwei oder mehr Zweige (32) verzweigt.Electric heating module according to at least one of claims 6 to 8, characterized
in that at least a subset of the heat-conducting lamellae (5, 6) is shaped in such a way that the lamellae (5, 6) form a stem (31) starting from the core (3, 4) and this stem becomes more distant from the core (3 , 4) branches at least once into two or more branches (32).
dass die wärmeleitenden Lamellen (5, 6) Strömungsquerschnitte aufweisen, die sich mit zunehmender Entfernung vom Kern (3, 4) verringern.Electric heating module according to at least one of claims 6 to 9, characterized
that the heat-conducting blades (5, 6) have flow cross sections that deal with increasing distance from the core (3, 4) decrease.
dass die wärmeleitenden Lamellen (5, 6) eine im Wesentlichen schwarze, insbesondere schwarz eloxierte Oberfläche aufweisen.Electric heating module according to at least one of claims 1 to 10, characterized
that the heat-conducting blades (5, 6) have a substantially black, in particular black anodized surface.
dadurch gekennzeichnet,
dass wenigstens eine Teilmenge der wärmeleitenden Lamellen (5, 6) solcherart geformt ist, dass die Lamellen (5, 6) vom Kern (3, 4) ausgehend einen Stamm (31) bilden und dieser Stamm sich mit zunehmender Entfernung vom Kern (3, 4) mindestens einmal in zwei oder mehr Zweige (32) verzweigt.Extrusion, casting or extrusion profile with heat-conducting lamellae (5, 6) extending radially outwards from a core (3, 4), in particular for use in a heat-dissipating region (7) of an electric heating module according to at least one of claims 1 until 11,
characterized,
in that at least a subset of the heat-conducting lamellae (5, 6) is shaped in such a way that the lamellae (5, 6) form a trunk (31) starting from the core (3, 4) and this trunk becomes more distant from the core (3, 4) branches at least once into two or more branches (32).
dadurch gekennzeichnet,
dass wenigstens eine Teilmenge der wärmeleitenden Lamellen (5, 6) solcherart geformt ist, dass die Lamellen (5, 6) einen sich im wesentlichen radial vom Kern (3, 4) weg erstreckenden Stamm (31) bilden, an dem eine Mehrzahl von im Wesentlichen senkrecht zur Haupterstreckungsrichtung des Stamms aus diesem hervorgehenden Ästen (34) angeformt ist.Extrusion, casting or extrusion profile with heat-conducting lamellae (5, 6) extending radially outwards from a core (3, 4), in particular for use in a heat-dissipating region (7) of an electric heating module according to at least one of claims 1 until 11,
characterized,
in that at least a subset of the heat-conducting lamellae (5, 6) are shaped in such a way that the lamellas (5, 6) form a stem (31) extending substantially radially away from the core (3, 4), to which a plurality of lugs (5, 6) extend Is formed substantially perpendicular to the main extension direction of the trunk from this resulting branches (34).
dass es einen Wärmeverteilerring (30) aufweist, der vom Kern (3, 4) radial beabstandet um diesen umläuft, und der mit sich radial nach innen bis zum Kern (3, 4) erstreckenden wärmeleitenden Lamellen (5, 6) versehen ist.Extrusion, casting or extrusion profile with heat-conducting lamellae (5, 6) extending radially outward from a core (3, 4), in particular for use in a heat-dissipating region (7) of a heating module according to at least one of claims 1 to 11, characterized
in that it has a heat distribution ring (30) which is radially spaced around the core (3, 4) and which is provided with heat conducting fins (5, 6) extending radially inwardly to the core (3, 4).
dadurch gekennzeichnet,
dass der Wärmeverteiferring (30) auch mit sich radial nach außen erstreckenden wärmeleitenden Lamellen (5, 6) versehen ist.Extrusion, casting or extrusion profile according to claim 14,
characterized,
in that the heat recovery ring (30) is also provided with radially outwardly extending heat conducting lamellae (5, 6).
dadurch gekennzeichnet,
dass es aus mindestens zwei Modulen (37, 38) zusammensetzbar ist, wobei ein erstes Modul (37) den Kern (3, 4) umgibt und wärmeleitend mit diesem verbunden ist, und ein zweites Modul (38) so an das erste Modul anbringbar ist, dass es dieses umgibt und mit diesem wärmeleitend verbunden ist.Extrusion, casting or extrusion profile with heat-conducting lamellae (5, 6) extending radially outwards from a core (3, 4), in particular for use in a heat-dissipating region (7) of an electric heating module according to at least one of claims 1 until 11,
characterized,
in that it can be assembled from at least two modules (37, 38), wherein a first module (37) surrounds the core (3, 4) and is thermally conductively connected thereto, and a second module (38) can be attached to the first module in that it surrounds this and is connected to it in a heat-conducting manner.
dadurch gekennzeichnet,
dass die wärmeleitenden Lamellen (5, 6) eine im Wesentlichen schwarze, insbesondere schwarz eloxierte Oberfläche aufweisen.Extrusion, casting or extrusion profile according to one of the claims 12 bit 16,
characterized,
that the heat-conducting blades (5, 6) have a substantially black, in particular black anodized surface.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL11192857T PL2519076T3 (en) | 2011-04-30 | 2011-12-09 | Electric heating module for airflow heating |
PCT/EP2012/057924 WO2012150219A2 (en) | 2011-04-30 | 2012-04-30 | Electrical heating module for airflow heating |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202011100054U DE202011100054U1 (en) | 2011-04-30 | 2011-04-30 | Electric heating module for air flow heating |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2519076A2 true EP2519076A2 (en) | 2012-10-31 |
EP2519076A3 EP2519076A3 (en) | 2013-02-06 |
EP2519076B1 EP2519076B1 (en) | 2014-06-11 |
Family
ID=44316339
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11192857.8A Not-in-force EP2519076B1 (en) | 2011-04-30 | 2011-12-09 | Electric heating module for airflow heating |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2519076B1 (en) |
DE (1) | DE202011100054U1 (en) |
ES (1) | ES2495424T3 (en) |
PL (1) | PL2519076T3 (en) |
WO (1) | WO2012150219A2 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0350528A1 (en) | 1988-07-15 | 1990-01-17 | David & Baader DBK Spezialfabrik elektrischer Apparate und Heizwiderstände GmbH | Radiator |
US6541737B1 (en) | 1998-11-11 | 2003-04-01 | Daimlerchrysler Ag | Temperature detector for an air-conditioned vehicle seat |
EP1464533A1 (en) | 2003-04-02 | 2004-10-06 | Catem GmbH & Co.KG | Motor vehicle seat and blower for such a motor vehicle seat |
DE202005012394U1 (en) | 2005-08-06 | 2005-12-08 | Microhellix Systems Gmbh | Electric heating module for airflow warming especially in vehicles, has heat emission section constructed in ring-form and especially circular, with heat conducting vanes arranged to extend radially |
DE102007006058A1 (en) | 2007-02-02 | 2008-08-07 | Microhellix Systems Gmbh | Electric heating module for air flow heating, in particular for heating and ventilation of seats |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2309681Y (en) * | 1997-09-18 | 1999-03-03 | 范长福 | PTC liquid electric heater |
GB2352330B (en) * | 1997-12-25 | 2001-04-11 | Yazaki Corp | Heat radiation system for electric circuitry |
JPH11186003A (en) * | 1997-12-25 | 1999-07-09 | Yazaki Corp | Heat sink structure of ptc device |
-
2011
- 2011-04-30 DE DE202011100054U patent/DE202011100054U1/en not_active Expired - Lifetime
- 2011-12-09 EP EP11192857.8A patent/EP2519076B1/en not_active Not-in-force
- 2011-12-09 PL PL11192857T patent/PL2519076T3/en unknown
- 2011-12-09 ES ES11192857.8T patent/ES2495424T3/en active Active
-
2012
- 2012-04-30 WO PCT/EP2012/057924 patent/WO2012150219A2/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0350528A1 (en) | 1988-07-15 | 1990-01-17 | David & Baader DBK Spezialfabrik elektrischer Apparate und Heizwiderstände GmbH | Radiator |
US6541737B1 (en) | 1998-11-11 | 2003-04-01 | Daimlerchrysler Ag | Temperature detector for an air-conditioned vehicle seat |
EP1464533A1 (en) | 2003-04-02 | 2004-10-06 | Catem GmbH & Co.KG | Motor vehicle seat and blower for such a motor vehicle seat |
EP1479918A1 (en) | 2003-04-02 | 2004-11-24 | Catem GmbH & Co. KG | Blower for a motor vehicle seat |
DE202005012394U1 (en) | 2005-08-06 | 2005-12-08 | Microhellix Systems Gmbh | Electric heating module for airflow warming especially in vehicles, has heat emission section constructed in ring-form and especially circular, with heat conducting vanes arranged to extend radially |
DE102007006058A1 (en) | 2007-02-02 | 2008-08-07 | Microhellix Systems Gmbh | Electric heating module for air flow heating, in particular for heating and ventilation of seats |
Also Published As
Publication number | Publication date |
---|---|
EP2519076A3 (en) | 2013-02-06 |
ES2495424T3 (en) | 2014-09-17 |
WO2012150219A3 (en) | 2013-03-21 |
EP2519076B1 (en) | 2014-06-11 |
WO2012150219A2 (en) | 2012-11-08 |
DE202011100054U1 (en) | 2011-06-15 |
PL2519076T3 (en) | 2014-11-28 |
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