EP1253032B1 - Electrical heating device with a heater block mounted in a frame - Google Patents
Electrical heating device with a heater block mounted in a frame Download PDFInfo
- Publication number
- EP1253032B1 EP1253032B1 EP02006425A EP02006425A EP1253032B1 EP 1253032 B1 EP1253032 B1 EP 1253032B1 EP 02006425 A EP02006425 A EP 02006425A EP 02006425 A EP02006425 A EP 02006425A EP 1253032 B1 EP1253032 B1 EP 1253032B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- frame
- block
- transverse
- electrical heating
- members
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 72
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 230000001550 time effect Effects 0.000 description 1
- 210000002105 tongue Anatomy 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
- 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
-
- 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
- F24H3/047—Multiple-piece frames assembled on their four or more edges
-
- 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
- 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 invention relates to an electric heater with a heating block, which includes a plurality of parallel electrical heating elements and intermediate heat conducting ribs, and a frame in which the heating block is held and having two block-clamping trained longitudinal leg and two perpendicularly arranged transverse leg.
- Such electrical heaters are used for example in heating systems of motor vehicles for heating a vehicle interior.
- heating elements often strip-shaped PTC heating coils are used, which are constructed of two sheets and between these held in openings of a sealing profile PTC elements.
- the frame consists of two circumferential, parallel to the Schublockebene opposite frame parts made of thermoplastic material, wherein the longitudinal legs are formed block Verspannend that they easily in the relaxed, unassembled state from the central region to its two end curved outside. In the assembled state brace the longitudinal leg due to their elasticity, the heating block between them.
- the frame consists of two frame parts, which result by dividing the transverse limbs along a plane perpendicular to the Schublockebene and the transverse limbs dividing plane.
- the block bracing is done by connecting the frame parts by means of spring clips or spring-loaded screws.
- the transverse legs of the block-holding frame are split longitudinally at least at their ends, and the longitudinal legs are provided at their corresponding ends with at least one wedge-like area and held clamped with the respective wedge surfaces between the end portions of the transverse legs.
- the wedge surfaces are realized in that the longitudinal legs are formed as a profile with trapezoidal or triangular cross-section.
- the transverse frame members embrace the ends of the longitudinal and against each other spring-loaded frame members form-locking and securing them in the transverse direction outwards. This allows a simple and largely automatable pre-assembly of the frame. However, a more extensive attachment appears desirable.
- the object of the invention is to provide an electric heater of the generic type, which can be assembled particularly advantageously and largely automated as needed.
- the invention solves this problem by providing an electric heater with the features of claim 1.
- the subclaims relate to advantageous developments.
- the transverse legs are provided at their ends with Um chargedsabêten with which they the corresponding longitudinal leg ends in the transverse direction to the outside.
- Um drawnsabêten
- the two longitudinal legs can be applied to the heating block and then introduced on one side between the two enclosing portions of a transverse leg. Subsequently, the other transverse leg can be placed under end workedem, block Verspannend compression of the longitudinal leg.
- the structure is self-holding pre-assembled, since the longitudinal leg compress the heating block and thereby stabilize the structure and the longitudinal leg ends are simultaneously secured against yielding by the Um chargedsabroughe the transverse leg.
- all necessary fasteners can be made without the pre-assembled body by hand or must be mechanically held together.
- the invention is characterized in that the attachment points for connecting at least a part of the frame legs with each other and / or for connecting at least a part of the electric heating elements with one or more of the compassionschenkein from a common and vertical to the Schublockebene mounting direction can be produced. Accordingly, all fasteners in a common, perpendicular to the Schublockebene mounting direction. By this measure, the production of the required (for the long life) attachments can be done automatically with very little effort.
- At least one of the two transverse legs is designed as a ring part. This can be pushed laterally on the held together structure of heating block and longitudinal leg, wherein the annular sections in the longitudinal leg at the same time act as the Um chargedsabitese, which therefore do not need to be specially trained.
- the ring shape allows optimal power distribution and a low component weight.
- the attachment points are realized by self-tapping screws or laser welding. These compounds are very tolerant to production, as they are after the pre-assembly of the invention to the desired. Points can be made without having to pay attention to a precise mutual positioning of the parts to be joined. At the same time effect These types of fastening ensure a secure mechanical and electrical connection.
- a transverse limb and the heating element connection ends to be contacted with it are designed such that these heating element connection ends can be fastened to a corresponding contacting surface of the transverse limb in the said common installation direction, in which all other fixings are made.
- the electric heater shown is particularly suitable as additional heating in a motor vehicle to heat leading into the vehicle interior air, as long as or as far as a heating and cooling circuit of a combustion engine usually used in the motor vehicle used as a drive heat is not sufficient.
- the heater has a heating block 1, which is composed of a plurality of spaced apart adjacent electrical heating elements in the form of strip-shaped PTC heating coils 2 and introduced between these, heat-conducting corrugated fins 3.
- the rectangular heating block 1 is held in a surrounding frame, which on each opposite block sides two parallel to the heating elements arranged longitudinal legs 4a, 4b and two perpendicular thereto arranged transverse legs 5a, 5b. All four frame legs 4a, 4b, 5a, 5b are preferably made of an aluminum material. At about half the height of the heating block, two adjacent PTC heating coils are spaced apart from one another by a resilient strip 6 by a spring strip 6 having a plurality of oppositely spread spring tongues.
- the spring strip 6 is used to achieve an elastic manufacturing tolerances compensating, backlash-free Walkerblock entries and is just like the corrugated fins made of thermally conductive and electrically conductive material.
- the two longitudinal legs 4a, 4b consist of a C-profile, as for the one profile 4a Fig. 2 visible, with its open side from the heating block 1 outwardly facing.
- the C-shaped longitudinal leg sections 4a, 4b are prefabricated slightly bent from the middle region to the two ends outwards, ie toward their open profile side.
- the material thickness is selected, for example, in the range between 1 mm and 2 mm so that the longitudinal legs 4a, 4b can be pressed during mounting in the direction of a straight course, as a result of which they are able to compress the heating block structure 1 without play and thereby to clamp it.
- transverse leg 5a, 5b is provided, which is suitable to pre-assemble the Wienblockup 1 can then make connections provided on the preassembled structure without this must be held together by hand or mechanically.
- Fig. 1 left transverse leg 5a is as out Fig. 3 seen as a closed ring or bracket part with two stiffening transverse webs 13, 14 is formed.
- This design has the advantage of ease of manufacture, ease of assembly and optimum power distribution with low weight.
- the Um chargedsabête 7a, 8a for embracing the longitudinal legs are formed in this rectangular transverse leg ring of the narrow side portions.
- the other transverse leg 5b is, as from the Fig. 1 and 4 seen, formed by a U-shaped profile, the open side facing away from the Bankblock inconvenience 1 to the outside. At its ends is this U-transverse leg profile 5b on the one hand with a first 90 ° -Abwinklung 7b, 8b provided. These two angled portions 7b, 8b extend in planes lying perpendicular to the longitudinal axis of the profile and form the enclosing sections for externally embracing the corresponding longitudinal leg ends 11, 12. On the other hand, a second 90 ° bend 15, 16 is formed on each end of this transverse leg 5b. These two bends 15, 16 extend in a common plane parallel to the heating block plane and lie in the mounted state against the in Fig. 1 front side of the corresponding longitudinal leg ends. Each of the two angled portions 15, 16 is provided with two attachment openings 17, 18.
- the second transverse leg 5b also serves as a common connection rail for electrically contacting each one sheet of each second PTC heating register of the heating block 1 with a first pole of an associated electrical power supply.
- a U-longitudinal edge 19 of this transverse leg 5b acts as a connecting rail contacting surface, which is parallel to the heating block level at the in Fig. 1 extends front block side.
- Fig. 5 shows one of the to be connected to this connection rail 19 PTC heating coil.
- these PTC heating coils have the above-described conventional structure consisting of two contact plates 20, 21, between which several PTC elements are located side by side in openings of a sealing profile 22, in which the contact plates 20, 21 in lateral longitudinal grooves are guided.
- the PTC heating register 2 can be electrically connected in a desired manner by a control device, not shown, for example arranged block-external control consisting of a drive logic and power electronics, for example, parallel or serial or in a mixed form.
- connection for the busbar 19 can take place via a connecting angle 26, which is integrally formed on the one longitudinal limb 4a and is located on the same block side as the connecting lugs 25, so that all cable connections can be made on a common block side.
- the metallic design of the longitudinal and transverse legs 4a, 4b, 5a, 5b ensures the electrical connection between the connection bracket 26 and the connecting rail 19th
- the described design of the heating block 1 shown with the surrounding and holding frame 4a, 4b, 5a, 5b offers great advantages in terms of a largely automatable assembly. This can be done as follows. First, the heating block 1 is loosely constructed in the usual way by alternately, suitable juxtaposition of corrugated fins 3 and PTC heating coils 2 with the central spring strip 6. The loose block structure is then compressed by two externally pressing on the longitudinal leg 4a, 4b clamping means until the transverse sides 5a, 5b can be easily plugged on the two transverse sides.
- the transverse limbs 4a, 4b hold the longitudinal limbs 5a, 5b in their block-tightening state, by engaging with their enclosing sections 7a, 8a, 7b, 8b, the longitudinal leg ends 9, 10, 11, 12 hold.
- the block structure 1 is tension-free braced and secured by the four frame legs 4a, 4b, 5a, 5b self-locking against falling apart.
- the block-centered spring strip 6 in this case ensures a uniform distribution of the frame 4a, 4b, 5a, 5b provided compressive force and compensates for manufacturing tolerances.
- all these fasteners 27, 28, 29 are realized by self-tapping screws, which are easily automated e.g. can be attached by a corresponding automatic screwdriver. The latter can be done very easily, if, as mentioned, all screw fasteners are made from one direction and in a common plane, i. at the same height.
- this type of fastening represent an optimal electrical connection as well as a safe, backlash-free mechanical connection, for the release of a higher torque than for screwing is required.
- this type of attachment is completely independent of manufacturing tolerances, since no corresponding mounting holes are to be brought into agreement, but the screw can be introduced in each case, where after the pre-assembly, the associated mounting opening 17, 18, 24 is located.
- As a mounting alternative offers laser welding, which is also tolerant of production and easy to automate and leads to reliable, backlash-free mechanical and electrical connections.
- the Wienblockrahmen inconvenience 1a produced as described can be surrounded with a plastic outer frame, which serves for sealing, insulation and support in the heating system and consists of a temperature-resistant plastic material.
- a plastic outer frame which serves for sealing, insulation and support in the heating system and consists of a temperature-resistant plastic material.
- the outer art frame 30 also has a defined air flow window 31, which ensures that the air flow to be heated only by the range of heated by the PTC heating coils 2 corrugated fins 3 passes and no unwanted bypass air streams occur, for example in the region of the frame legs or a cable harness opening.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Resistance Heating (AREA)
- Air-Conditioning For Vehicles (AREA)
- Surface Heating Bodies (AREA)
- Electric Stoves And Ranges (AREA)
- Central Heating Systems (AREA)
Abstract
Description
Die Erfindung bezieht sich auf eine elektrische Heizeinrichtung mit einem Heizblock, der mehrere parallel angeordnete elektrische Heizelemente und zwischenliegende Wärmeleitrippen beinhaltet, und einem Rahmen, in welchem der Heizblock gehalten ist und der zwei blockverspannend ausgebildete Längsschenkel und zwei dazu senkrecht angeordnete Querschenkel aufweist. Derartige elektrische Heizeinrichtungen werden beispielsweise in Heizungsanlagen von Kraftfahrzeugen zur Beheizung eines Fahrzeuginnenraums eingesetzt. Als Heizelemente werden häufig streifenförmige PTC-Heizregister verwendet, die aus zwei Blechen und zwischen diesen in Öffnungen eines Dichtprofils gehaltenen PTC-Elementen aufgebaut sind.The invention relates to an electric heater with a heating block, which includes a plurality of parallel electrical heating elements and intermediate heat conducting ribs, and a frame in which the heating block is held and having two block-clamping trained longitudinal leg and two perpendicularly arranged transverse leg. Such electrical heaters are used for example in heating systems of motor vehicles for heating a vehicle interior. As heating elements often strip-shaped PTC heating coils are used, which are constructed of two sheets and between these held in openings of a sealing profile PTC elements.
Bei einer in der
Bei einer in der
Aus der
Die Aufgabe der Erfindung ist die Bereitstellung einer elektrischen Heizeinrichtung gattungsgemäßer Art, die sich besonders vorteilhaft und bei Bedarf weitestgehend automatisiert zusammenbauen lässt.The object of the invention is to provide an electric heater of the generic type, which can be assembled particularly advantageously and largely automated as needed.
Die Erfindung löst dieses Problem durch die Bereitstellung einer elektrischen Heizeinrichtung mit den Merkmalen des Anspruchs 1. Die Unteransprüche betreffen vorteilhafte Weiterbildungen.The invention solves this problem by providing an electric heater with the features of claim 1. The subclaims relate to advantageous developments.
Bei dieser Heizeinrichtung sind die Querschenkel an ihren Enden mit Umfassungsabschnitten versehen, mit denen sie die korrespondierenden Längsschenkelenden in Querrichtung nach außen sichernd umfassen. Diese Maßnahme ermöglicht in Verbindung mit der blockverspannenden Ausbildung der Längsschenkel eine weitestgehend automatisierbare Vormontage des Heizblocks mit dem ihn umgebenden und haltenden Rahmen. Denn dazu können die beiden Längsschenkel an den Heizblock angelegt und dann auf einer Seite zwischen die beiden Umfassungsabschnitte des einen Querschenkels eingebracht werden. Anschließend kann der andere Querschenkel unter endseitigem, blockverspannendem Zusammendrücken der Längsschenkel aufgesetzt werden. Sobald auch er mit seinen beiden Umfassungsabschnitten die korrespondierenden Längsschenkelenden umfasst, ist der Aufbau selbsthaltend vormontiert, da die Längsschenkel den Heizblock zusammendrücken und dadurch dessen Aufbau stabilisieren und die Längsschenkelenden gleichzeitig gegen ein Nachgeben durch die Umfassungsabschnitte der Querschenkel gesichert sind. In diesem selbsthaltend vormontierten Zustand können dann sämtliche erforderlichen Befestigungen hergestellt werden, ohne dass der vormontierte Aufbau von Hand oder maschinell zusammengehalten werden muss.In this heater, the transverse legs are provided at their ends with Umfassungsabschnitten with which they the corresponding longitudinal leg ends in the transverse direction to the outside. This measure, in conjunction with the block-spanning training of the longitudinal leg allows a largely automated pre-assembly of the heating block with the surrounding and holding frame. For this purpose, the two longitudinal legs can be applied to the heating block and then introduced on one side between the two enclosing portions of a transverse leg. Subsequently, the other transverse leg can be placed under endseitigem, block Verspannend compression of the longitudinal leg. As soon as he also includes the corresponding longitudinal leg ends with his two Umfassungsabschnitten, the structure is self-holding pre-assembled, since the longitudinal leg compress the heating block and thereby stabilize the structure and the longitudinal leg ends are simultaneously secured against yielding by the Umfassungsabschnitte the transverse leg. In this self-holding preassembled state then all necessary fasteners can be made without the pre-assembled body by hand or must be mechanically held together.
Die Erfindung ist dadurch gekennzeichnet, dass die Befestigungsstellen zum Verbinden wenigstens eines Teils der Rahmenschenkel miteinander und/oder zum Verbinden von wenigstens einem Teil der elektrischen Heizelemente mit einem oder mehreren der Rahmenschenkein aus einer gemeinsamen und zur Heizblockebene senkrechten Montagerichtung herstellbar sind. Demgemäß erfolgen alle Befestigungen in einer gemeinsamen, zur Heizblockebene senkrechten Montagrichtung. Durch diese Maßnahme kann das Herstellen der (für die hohe Lebensdauer erforderlichen) Befestigungen automatisiert mit besonders geringem Aufwand erfolgen.The invention is characterized in that the attachment points for connecting at least a part of the frame legs with each other and / or for connecting at least a part of the electric heating elements with one or more of the Rahmenschenkein from a common and vertical to the Heizblockebene mounting direction can be produced. Accordingly, all fasteners in a common, perpendicular to the Heizblockebene mounting direction. By this measure, the production of the required (for the long life) attachments can be done automatically with very little effort.
In einer vorteilhaften Weiterbildung der Erfindung nach Anspruch 2 ist mindestens einer der beiden Querschenkel als Ringteil ausgebildet. Dieses kann seitlich auf den zusammengehaltenen Aufbau aus Heizblock und Längsschenkel aufgeschoben werden, wobei die Ringteilabschnitte im Bereich der Längsschenkel gleichzeitig als die Umfassungsabschnitte fungieren, die daher nicht extra ausgebildet werden müssen. Die Ringform ermöglicht eine optimale Kraftverteilung und ein geringes Bauteilgewicht.In an advantageous embodiment of the invention according to
In einer Weiterbildung der Erfindung nach Anspruch 3 sind die Befestigungsstellen durch selbstschneidende Schrauben oder Laserschweißstellen realisiert. Diese Verbindungen sind sehr fertigungstolerant, da sie nach der erfindungsgemäßen Vormontage an den gewünschten. Stellen hergestellt werden können, ohne dass auf eine genaue gegenseitige Positionierung der zu verbindenden Teile geachtet werden muss. Gleichzeitig bewirken diese Befestigungsarten eine sichere mechanische und elektrische Verbindung.In a development of the invention according to
Eine vorteilhafte Weiterbildung gemäß Anspruch 4 sieht vor, dass die Befestigungsstellen in einer gemeinsamen Ebene liegen.An advantageous development according to claim 4 provides that the attachment points lie in a common plane.
In einer Weiterbildung sind gemäß Anspruch 5 ein Querschenkel und die mit ihm zu kontaktierende Heizelement-Anschlussenden so gestaltet, dass diese Heizelement-Anschlussenden an einer entsprechenden Kontaktierungsfläche des Querschenkels in der besagten gemeinsamen Montagerichtung befestigt werden können, in der auch alle anderen Befestigungen hergestellt werden.In a further development, according to claim 5, a transverse limb and the heating element connection ends to be contacted with it are designed such that these heating element connection ends can be fastened to a corresponding contacting surface of the transverse limb in the said common installation direction, in which all other fixings are made.
Eine vorteilhafte Ausführungsform der Erfindung ist in den Zeichnungen dargestellt und wird nachfolgend beschrieben. Hierbei zeigen:
- Fig. 1
- eine perspektivische Draufsicht auf eine PTC-Heizeinrichtung mit einem Heizblock und einem diesen haltenden Rahmen für eine Kraftfahrzeug-Heizungsanlage,
- Fig. 2
- eine Draufsicht auf die in
Fig. 1 linke Stirnseite der Heizeinrichtung, - Fig. 3
- eine Draufsicht auf einen als Ringteil ausgebildeten Querschenkel des Rahmens von
Fig. 1 , - Fig. 4
- eine Perspektivansicht des anderen Querschenkels des Rahmens von
Fig. 1 , - Fig. 5
- eine Seitenansicht eines der im Heizblock von
Fig. 1 verwendeten PTC-Heizregister und - Fig. 6
- eine Perspektivansicht der mit einem Kunststoff-Außenrahmen komplettierten Heizeinrichtung von
Fig. 1 .
- Fig. 1
- a perspective top view of a PTC heater with a heating block and this holding frame for a motor vehicle heating system,
- Fig. 2
- a top view of the in
Fig. 1 left end of the heater, - Fig. 3
- a plan view of a formed as a ring part transverse leg of the frame of
Fig. 1 . - Fig. 4
- a perspective view of the other transverse leg of the frame of
Fig. 1 . - Fig. 5
- a side view of the one in the heating block of
Fig. 1 used PTC heating coil and - Fig. 6
- a perspective view of the completed with a plastic outer frame heater of
Fig. 1 ,
Die gezeigte elektrische Heizeinrichtung eignet sich insbesondere als Zusatzheizung in einem Kraftfahrzeug, um in den Fahrzeuginnenraum zu führende Luft aufzuheizen, solange bzw. soweit von einem Heiz- und Kühlkreislauf eines üblicherweise im Kraftfahrzeug als Antrieb verwendeten Verbrennungsmotors abgegebene Wärme hierzu nicht ausreicht. Wie in
Der rechteckförmige Heizblock 1 ist in einem umgebenden Rahmen gehalten, der auf jeweils gegenüberliegenden Blockseiten zwei zu den Heizelementen parallel angeordnete Längsschenkel 4a, 4b und zwei dazu senkrecht angeordnete Querschenkel 5a, 5b beinhaltet. Alle vier Rahmenschenkel 4a, 4b, 5a, 5b bestehen bevorzugt aus einem Aluminiummaterial. Ungefähr auf halber Höhe des Heizblocks sind zwei benachbarte PTC-Heizregister statt durch eine Wellrippe durch einen Federstreifen 6 mit einer Mehrzahl von entgegengesetzt auseinandergespreizten Federzungen voneinander beabstandet. Der Federstreifen 6 dient der Erzielung eines elastisch Fertigungstoleranzen ausgleichenden, spielfreien Heizblockaufbaus und ist ebenso wie die Wellrippen aus wärmeleitendem und elektrisch leitendem Material gefertigt.The rectangular heating block 1 is held in a surrounding frame, which on each opposite block sides two parallel to the heating elements arranged longitudinal legs 4a, 4b and two perpendicular thereto arranged
Die beiden Längsschenkel 4a, 4b bestehen aus einem C-Profil, wie für das eine Profil 4a aus
Passend zu dieser Längsschenkelgestaltung ist eine spezielle Gestaltung der Querschenkel 5a, 5b vorgesehen, die dazu geeignet ist, den Heizblockaufbau 1 selbsthaltend vormontieren zu können, um dann vorgesehene Verbindungen am vormontierten Aufbau vorzunehmen, ohne dass dieser hierfür von Hand oder mechanisch zusammengehalten werden muss. Dazu weisen die Querschenkel 5a, 5b an ihren beiden Enden, d.h. Stirnseiten, jeweilige Umfassungsabschnitte 7a, 8a bzw. 7b, 8b auf. Diese umfassen im montierten Zustand des Heizblocks, wie in
Der eine, in
Der andere Querschenkel 5b ist, wie aus den
Der zweite Querschenkel 5b dient außerdem als gemeinsame Anschlussschiene zum elektrischen Kontaktieren je eines Bleches jedes zweiten PTC-Heizregisters des Heizblocks 1 mit einem ersten Pol einer zugehörigen elektrischen Spannungsversorgung. Dazu fungiert die eine U-Längsflanke 19 dieses Querschenkels 5b als Anschlussschienen-Kontaktierungsfläche, die sich parallel zur Heizblockebene an der in
Die jeweils anderen, alternierend im Block angeordneten PTC-Heizregister, die nicht mit der Sammelschiene 19 kontaktiert sind, weisen am gegenüberliegenden Ende jeweils eine von einem ihrer beiden Bleche gebildete Kontaktfahne 25 auf, wie aus den
Die beschriebene Gestaltung des gezeigten Heizblocks 1 mit dem ihn umgebenden und haltenden Rahmen 4a, 4b, 5a, 5b bietet große Vorteile bezüglich einer weitgehend automatisierbaren Montage. Diese lässt sich wie folgt durchführen. Zunächst wird in üblicher Weise durch abwechselndes, geeignetes Aneinanderlegen von Wellrippen 3 und PTC-Heizregistern 2 mit dem mittleren Federstreifen 6 der Heizblock 1 lose aufgebaut. Der lose Blockaufbau wird dann von zwei von außen auf die Längsschenkel 4a, 4b drückenden Spannmittel zusammengedrückt, bis auf den beiden Querseiten die Querschenkel 5a, 5b einfach aufgesteckt werden können. Nach Lösen der Spannmittel halten die Querschenkel 4a, 4b die Längsschenkel 5a, 5b in deren blockverspannenden Zustand, indem sie mit ihren Umfassungsabschnitten 7a, 8a, 7b, 8b die Längsschenkelenden 9, 10, 11, 12 festhalten. In diesem Zustand ist folglich der Blockaufbau 1 spielfrei verspannt und durch die vier Rahmenschenkel 4a, 4b, 5a, 5b selbsthaltend gegen Auseinanderfallen gesichert. Der blockmittige Federstreifen 6 sorgt hierbei für eine gleichmäßige Verteilung der vom Rahmen 4a, 4b, 5a, 5b bereitgestellten Druckkraft und gleicht Fertigungstoleranzen aus.The described design of the heating block 1 shown with the surrounding and holding
Danach können die erforderlichen Befestigungen bzw. mechanischen und elektrischen Verbindungen am Blockaufbau hergestellt werden, ohne dass letzterer dazu von Hand oder maschinell zusammengehalten werden muss. Von besonderem Vorteil ist hierbei, dass aufgrund der beschriebenen Block- und Rahmengestaltung alle Befestigungsstellen von einer gemeinsamen Montagerichtung her bedient werden können, und zwar von der in
Im gezeigten Beispiel sind alle diese Befestigungen 27, 28, 29 durch selbstschneidende Schrauben realisiert, die leicht automatisiert z.B. durch einen entsprechenden automatischen Schrauber angebracht werden können. Letzterer kann dazu sehr einfach geführt werden, wenn wie erwähnt alle Schraubbefestigungen von einer Richtung her erfolgen und in einer gemeinsamen Ebene, d.h. auf gleicher Höhe, liegen.In the example shown, all these
Weitere Vorteile dieser Befestigungsart liegen darin, dass sie eine optimale elektrische Verbindung ebenso wie eine sichere, spielfreie mechanische Verbindung darstellen, für deren Lösen ein höheres Drehmoment als zum Einschrauben erforderlich ist. Zudem ist diese Befestigungsart vollkommen unabhängig von Fertigungstoleranzen, da keine korrespondierenden Befestigungsöffnungen in Übereinstimmung zu bringen sind, sondern die Schraube jeweils dort eingebracht werden kann, wo sich nach der Vormontage die zugehörige Befestigungsöffnung 17, 18, 24 befindet. Als Befestigungsalternative bietet sich z.B. Laserschweißen an, was ebenfalls fertigungstolerant und leicht automatisierbar ist und zu zuverlässigen, spielfreien mechanischen und elektrischen Verbindungen führt.Other advantages of this type of fastening are that they represent an optimal electrical connection as well as a safe, backlash-free mechanical connection, for the release of a higher torque than for screwing is required. In addition, this type of attachment is completely independent of manufacturing tolerances, since no corresponding mounting holes are to be brought into agreement, but the screw can be introduced in each case, where after the pre-assembly, the associated mounting
Weitere Vorteile der erfindungsgemäßen Blockrahmengestaltung sind die Wiederverwertbarkeit, wenn die vier Rahmenschenkel 4a, 4b, 5a, 5b wie beschrieben ausschließlich aus einem Aluminiummaterial gefertigt sind, das durch die Art der Längs- und Querschenkel 4a, 4b, 5a, 5b niedrige Gewicht des Aufbaus und die vergleichsweise geringen Herstellungskosten. Es versteht sich, dass neben der oben beschriebenen Heizeinrichtung weitere erfindungsgemäße Realisierungen möglich sind, beispielsweise eine solche, bei der beide Querschenkel als geschlossenes Ringteil ausgebildet sind. Statt der erwähnten PTC-Heizregister sind je nach Anwendungsfall auch andere herkömmliche elektrische Heizelemente verwendbar und statt der erwähnten Streifenform ist jede andere, für einen Blockaufbau geeignete Form für die elektrischen Heizelemente möglich.Further advantages of the block frame design according to the invention are the reusability, if the four
Wie in
Claims (5)
- Electrical heating device, in particular for a motor vehicle, with- a heating block (1) with several electrical heating elements (2) arranged in parallel, and heat conducting fins (3) arranged in between, and- a frame, in which the heating block (1) is held, with two longitudinal members (4a, 4b) designed to tension the block, and two transverse members (5a, 5b) arranged perpendicular thereto, wherein- the transverse members (5a, 5b) have embracing sections (7a, 8a, 7b, 8b) at their ends, with which they embrace the corresponding ends of the longitudinal members (9, 10, 11, 12) in lateral direction while interlocking these in transverse direction against the exterior,characterised in that
the fixation sites, connecting at least one part of the members of the frame (4a, 4b, 5a, 5b) with each other and/or connecting at least one part of the electrical heating elements (2) with one or several of the members of the frame (4a, 4b, 5a, 5b), can be manufactured from a common direction of assembly, which is arranged perpendicular to the plane of the heating block. - Electrical heating device according to claim 1,
further characterised in that
at least one of the transverse members (5a, 5b) is designed to be a closed-loop part. - Electrical heating device according to claim 1 or 2,
further characterised in that
the fixation sites (27, 28, 29), connecting at least one part of the members of the frame (4a, 4b, 5a, 5b) with each other and/or connecting at least one part of the electrical heating elements (2) with one or several of the members of the frame (4a, 4b, 5a, 5b), are implemented by self-cutting screws (27, 28, 29) or laser-welded joints. - Electrical heating device according to claim 1,
further characterised in that
the fixation sites (27, 28, 29) are arranged in a common plane. - Electrical heating device according to claim 1 or 4,
further characterised in that- at least one transverse member (5b) is designed to be an electrically conducting collective line of the heating elements with a contacting surface (19), which is arranged in parallel with the plane of the heating block, and- the heating elements, which are connected to the collective line, have a contacting angular piece (23) with a contacting surface (23a) at their corresponding contacting ends, through which they are connected with the contacting surface (19) of the collective line.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10121568A DE10121568A1 (en) | 2001-04-25 | 2001-04-25 | Electric heating device with heating block held in a frame |
DE10121568 | 2001-04-25 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1253032A2 EP1253032A2 (en) | 2002-10-30 |
EP1253032A3 EP1253032A3 (en) | 2003-10-08 |
EP1253032B1 true EP1253032B1 (en) | 2009-05-13 |
Family
ID=7683525
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02006425A Expired - Lifetime EP1253032B1 (en) | 2001-04-25 | 2002-03-22 | Electrical heating device with a heater block mounted in a frame |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1253032B1 (en) |
AT (1) | ATE431267T1 (en) |
DE (2) | DE10121568A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015058692A1 (en) * | 2013-10-22 | 2015-04-30 | Byd Company Limited | Positive temperature coefficient heating assembly and defroster for a vehicle |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10216010A1 (en) * | 2002-04-11 | 2003-10-23 | Behr France Sarl | Electric heating device, in particular for a motor vehicle |
KR100992579B1 (en) * | 2003-09-06 | 2010-11-08 | 자화전자 주식회사 | A electric heater |
EP1515587B1 (en) | 2003-09-11 | 2006-12-13 | Catem GmbH & Co. KG | Electrical heated device with sealed heating element |
EP1580495B1 (en) * | 2004-03-22 | 2011-11-16 | Halla Climate Control Corporation | Electric heater |
ES2543026T3 (en) | 2011-09-16 | 2015-08-13 | Cmp Products Limited | Cable retention device |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3869773C5 (en) * | 1988-07-15 | 2010-06-24 | Dbk David + Baader Gmbh | Radiator. |
DE4215498A1 (en) * | 1992-05-12 | 1993-11-25 | Tuerk & Hillinger Gmbh | Electric heater for gaseous media - has resistors sandwiched between aluminium finned plates with power supply for plug connection through fins |
FR2701757B1 (en) * | 1993-02-18 | 1995-04-21 | Valeo Thermique Habitacle | Electric heating radiator, in particular for the passenger compartment of a motor vehicle. |
US5471034A (en) * | 1993-03-17 | 1995-11-28 | Texas Instruments Incorporated | Heater apparatus and process for heating a fluid stream with PTC heating elements electrically connected in series |
JPH0855673A (en) * | 1994-08-10 | 1996-02-27 | Murata Mfg Co Ltd | Positive temperature coefficient thermister heat generating device |
DE19706199B4 (en) * | 1997-02-18 | 2005-11-10 | Behr Gmbh & Co. Kg | Electric heating device, in particular for a motor vehicle |
DE19732010A1 (en) * | 1997-07-25 | 1999-01-28 | Behr Gmbh & Co | Electric heating device, in particular for a motor vehicle |
DE19911547C5 (en) * | 1999-03-16 | 2005-12-01 | Behr Gmbh & Co. Kg | Electric heating device for a motor vehicle |
-
2001
- 2001-04-25 DE DE10121568A patent/DE10121568A1/en not_active Ceased
-
2002
- 2002-03-22 EP EP02006425A patent/EP1253032B1/en not_active Expired - Lifetime
- 2002-03-22 DE DE50213538T patent/DE50213538D1/en not_active Expired - Lifetime
- 2002-03-22 AT AT02006425T patent/ATE431267T1/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015058692A1 (en) * | 2013-10-22 | 2015-04-30 | Byd Company Limited | Positive temperature coefficient heating assembly and defroster for a vehicle |
Also Published As
Publication number | Publication date |
---|---|
ATE431267T1 (en) | 2009-05-15 |
EP1253032A3 (en) | 2003-10-08 |
EP1253032A2 (en) | 2002-10-30 |
DE10121568A1 (en) | 2002-10-31 |
DE50213538D1 (en) | 2009-06-25 |
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