EP0135704B1 - Elément de chauffage électrique - Google Patents
Elément de chauffage électrique Download PDFInfo
- Publication number
- EP0135704B1 EP0135704B1 EP84108800A EP84108800A EP0135704B1 EP 0135704 B1 EP0135704 B1 EP 0135704B1 EP 84108800 A EP84108800 A EP 84108800A EP 84108800 A EP84108800 A EP 84108800A EP 0135704 B1 EP0135704 B1 EP 0135704B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heating element
- resistance heating
- element according
- strip
- bend
- 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
Links
Images
Classifications
-
- 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
Definitions
- the invention relates to a resistance heating element with a heating conductor consisting of a one-piece sheet metal stamping strip and running in a meandering manner in a longitudinal plane, the sheet metal stamping strip being slidably held in the holder in the region of meandering arches.
- Such a resistance heating element is suitable for. B. for an intake air line between the carburetor and the engine block of an internal combustion engine, wherein the resistance heating element is flushed with a fluid to heat it.
- Such a resistance heating element is known from DE-C-650 676.
- the meandering heating conductor is made from a rectangular sheet metal strip, in which the latter is cut alternately from the two long sides. The resulting parallel strips are then bent out of the sheet plane in opposite directions, but the arc regions connecting the strips remain in the original sheet plane and are slidably supported in the grooves of a holder.
- a resistance heating element which has a meandering heating conductor element consisting of a one-piece stamped sheet metal part.
- This heating conductor is essentially made up of a corrugation - as a flat, rectangular element.
- DE-A 1-2 703 293 describes a heating register with a housing in which a flat strip made of metallic resistance material is accommodated.
- the flat strip has incisions which are made alternately from the opposite longitudinal edges in the opposite direction.
- the metal strip is then pulled apart like an accordion.
- the strip is bent in a ring.
- the invention is therefore based on the object, starting from the prior art described at the outset, to provide a resistance heating element which, while being easy to manufacture, offers the fluid a very large surface area to be flushed per unit space.
- the heating conductor also runs in a meandering manner in a transverse plane perpendicular to the longitudinal plane in such a way that at least two meandering segments connected to one another are arranged one behind the other.
- the invention preferably relates to a small-sized resistance heating element.
- the element shown in FIGS. 2 and 3 has a width of 20 mm, a height of 40 mm and a length of 50 mm.
- the large length in turn causes large changes in length in the event of temperature changes which have to be absorbed without the fixed mounting of the metal element suffering as a result.
- the resistance heating element 1 essentially consists of two bearing plates 2 and 3, which are arranged at a vertical distance from one another and preferably consist of plastic. For the sake of simplicity, reference will now be made to the upper bearing plate 2 and the lower bearing plate 3 with reference to FIGS. 2 to 5.
- the one-piece resistance metal element is arranged between the bearing plates.
- the resistance metal element essentially consists of a one-piece sheet metal stamping strip 4 which forms meandering stamped segments arranged one behind the other, the segments arranged one behind the other also being curved in a meandering manner.
- a particularly advantageous spatial shape of the sheet metal stamping strip 4 for the purposes of the invention results from a circuit board 5, which is shown in plan view in FIG. 1.
- the board consists of a one-piece sheet metal strip, for example a width of 2 mm and a thickness of 0.3 mm.
- the spatial shape of the board is u. a. optimized with regard to the punched sheet metal waste.
- the three-dimensional shape of the circuit board 5 is mirror-symmetrical to the longitudinal axis 10 and has at least one contact segment 6 and one loop segment 7.
- the segments 6 and 7 are with Exception of an arc 7a formed mirror-symmetrically to a transverse axis 12. Between the segments 6 and 7 there can alternately be further extension segments 11 and 11 a, the segments 11 having the same shape in terms of space as the segment and the segments 11, with the exception of the arch 7 a, being the same as the segment 7.
- Fig. 1 only a transverse axis 12 is drawn in, so as not to disturb the clarity. Nevertheless, the segments 11, 11a or 6 and 7 are mirror images of a transverse axis 12.
- the contact segment 6 or an extension segment 11a consists of two current paths 6a and 6b punched out in a meandering pattern, which are arranged at a distance from one another in each case in a plane, the paths 6a and 6b having the same spatial shape in mirror symmetry with respect to the axis 10.
- Each path 6a, 6b has a strip 8 extending next to the axis 10 and parallel to it in the direction of the loop segment 7, which opens into an arc 8a directed away from the axis 10, to which a returning strip runs parallel to the strip 8 8b, which in turn opens into a second bend 8c directed away from the axis 10, from which a strip 8d running parallel to the axis 10 leads to the loop segment 7 or to an extension segment 11.
- the arches 8a and 8c are preferably designed as 180 ° arcs (semicircular arches), so that when viewed from above, an ideal punched out meandering shape results.
- meandering current paths can be integrally connected to the side.
- flatter arches 8a and / or 8c can be selected so that the strips 8 and 8b and / or 8b and 8c run divergingly.
- the current path 6a has the same spatial shape as the current path 6b, which is why the same reference numerals have been used.
- the loop segment 7 or an extension segment 11 also consists of two meandering current paths 13f and 13g, which are spaced apart in one plane next to the axis 10, the paths 13f and 13g having the same spatial shape symmetrically to the axis 10.
- Each path 13f, 13g has a strip 13e which is coaxial with the strip 8d, i. H. the strip 8d merges in one piece in the region of an axis 12 into the strip 13e.
- At the end of the strip 13e there is an arc 13a directed towards the longitudinal axis 10, which ends in a strip 13b running parallel to the strip 13e.
- the strip 13b merges at the end opposite the curve 13a into a curve 13c directed towards the longitudinal axis 10, which is followed by a straight strip 13d running parallel to the strips 13e and 13b.
- the path 13g merges into the path 13f, so that there is an integral, meandering punched-out electrical conductor from a stamped sheet metal strip, which is composed of the successive paths 6b, 13g, 13f and 6a, which are connected to each other with the bow 7a. If a power source is placed on the contact strips 8, the sheet metal strip can heat up as a resistance element.
- arches 13a and 13c of the paths 13g and 13f are shown as 180 ° arcs, so that when viewed from above, an ideal punched out meandering shape also results.
- meandering current paths can be integrally connected to the side.
- flatter arches 13a and / or 13c can be selected so that the strips 13d and 13b as well as 13b and 13e run divergingly.
- the contact strip 8 of the path 6b is preferably shorter than the contact strip of the path 6a.
- Fig. 1 an expedient shape can be seen, in which the contact strip marked with the reference number 9 of the path 6a longer and in the top view in a Z-shape bent into the plane of the contact strip 8 of the path 6b such that the end of the contact strip 9 coaxial with Contact strip 8 of path 6b comes to rest.
- extension segments 11, 11 correspond, as already mentioned, in terms of space to the segments 6 or 7. Accordingly, the same reference numerals are drawn in FIG. 1.
- the segments are each bent over a transverse axis 12 or in the transverse axis region, such that an arc 14 leading downwards is followed by an upward arc 15, so that viewed in the direction of flow (FIG. 2), a resistance metal element bent in a meandering shape 4 results.
- the arches 14 and 15 do not have to be round, but can also be angular, as shown in FIG. 2, and have a straight web 16. This shape is expedient for fastening the resistance metal element 4 in the bearing plates 2 and 3. It is important that the arches 14 and 15 create a sufficient distance or space 17 between adjacent segments 6 and 7 or 11 and 11 a or 6 and 11 and 11a and 7.
- the intermediate space 17 advantageously allows the strips 8b, 8d and 8 after the arch regions 8c and 8a or the strips 13e, 13d and 13b after the arch regions 13a and 13c to be spread apart, as can be seen in FIG. 2, so that between the strips 8d and 8b and 8b and 8 or 13e and 13d and 13b and 13d a gap 18 is formed. This spreading leads to the fact that a large number of strips can be flowed against directly by the fluid flow, where in which the adjacent strips are laterally offset one behind the other in the flow direction. In this respect, an optimal heat absorption is brought about by the fluid.
- the sheet metal stamping strip 4 which is punched out in a meandering shape and bent perpendicularly to the punched out meandering shape, is inserted with pins 25 in the bearing plates 2 and 3, the bearing plates 2 and 3 being kept at a distance by a web 19, 20.
- the webs 19, 20 are preferably formed in one piece on the bearing plate 2, each engage with a corresponding opening 21 in the bearing plate 3 with their latching arms 31 spaced apart by a U-shaped recess 30 (FIG. 5) and snap behind with their latching lugs 22 an edge of the respective opening 21, the depth of the recess 30 being dimensioned such that the bottom of the U-shaped recess 30 sits on the bottom of the bearing plate 3, which results in the spacing.
- the web 20 has recesses 23, 24 which are arranged vertically one above the other and which extend from the outward, ie. H. contact ends 8 and 9 bent towards the web 20 are penetrated (FIG. 2), so that easily accessible connections for a power source are created.
- bearing pins 25 in the area of the arches 14 and 15, preferably in the web 16 are each connected to a side edge which is bent at right and upward angles, a slot 26 (FIG 3, 5) reach through in the bearing plate 2, 3 in a form-fitting manner, preferably with a press fit, and are bent over in the free end region approximately in the manner of a rivet, so that they cannot easily slide out of the slot 26.
- the journals 25 are shaped so that they sit immovably in the slot 26.
- the journals each have a step 25a on the two longitudinal edges, which step on the bottom of the bearing plate 2 or 3, since the slot 26 is made narrower than the width of a bearing journal 25 in the area of the steps 25a , so that only the area of a pin 25 protruding beyond the steps 25a passes through the slot 26.
- This type of fastening should expediently create a distance between the arches 14 and 15 and 13a, 13c and 8a, 8c from the bottom of an adjacent bearing plate 2, 3, so that the segments 6, 7 and 11, 11a face the bottom of the bearing plates 2 , 3 can expand unhindered in the event of thermal expansion of the segments.
- the fastening pins 25 are located in the bending areas 14, 15, in which the changes in length during temperature changes are practically negligible. Rather, the temperature-related changes in length are effective in the curved areas 13a, 13c and 8a, 8c, in that the segments can approach the bearing plates in these areas.
- sliding pegs 27 (FIG. 3) protruding upwards or downwards in the material plane of the paths are connected in the arch regions mentioned, pass through the correspondingly corresponding slots 28 in the bottom of the plates 2, 3 and can slide freely in these slots 28 in the event of thermal expansion or shrinkage of the segments.
- the bearing plates 2, 3 have frame-like webs 29 pointing outwards.
- the new resistance heating element ensures a much larger surface in a small space compared to the proposal described, so that better heat emission can also be achieved.
- the creation of the special spatial shape described makes it possible to form a resistance heating element which provides a meandering shape both in the direction of flow and perpendicular to it.
- circuit board It is particularly advantageous for the manufacture of the circuit board to provide a connecting web between the arches 13a and 8a or 8a and 13c, which is produced to form a sliding pin 27 by an S-shaped or Z-shaped separating cut without loss of material.
Landscapes
- Resistance Heating (AREA)
Claims (29)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3328078 | 1983-08-03 | ||
DE19833328078 DE3328078A1 (de) | 1983-08-03 | 1983-08-03 | Widerstandsheizelement |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0135704A1 EP0135704A1 (fr) | 1985-04-03 |
EP0135704B1 true EP0135704B1 (fr) | 1988-11-09 |
Family
ID=6205705
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84108800A Expired EP0135704B1 (fr) | 1983-08-03 | 1984-07-25 | Elément de chauffage électrique |
Country Status (4)
Country | Link |
---|---|
US (1) | US4553126A (fr) |
EP (1) | EP0135704B1 (fr) |
JP (1) | JPS6059690A (fr) |
DE (2) | DE3328078A1 (fr) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3605611A1 (de) * | 1986-02-21 | 1987-08-27 | Braun Ag | Verfahren zum herstellen eines heizkoerpers |
EP0355210A1 (fr) * | 1988-08-26 | 1990-02-28 | Koninklijke Philips Electronics N.V. | Elément chauffant |
US5281944A (en) * | 1991-04-25 | 1994-01-25 | Mosebach Manufacturing Company | Slide-in resistor grid |
DE4121075A1 (de) * | 1991-06-26 | 1993-01-14 | Pierburg Gmbh | Heizelementanordnung in einem luftansaugkanalsystem einer brennkraftmaschine |
US5304978A (en) * | 1992-08-10 | 1994-04-19 | Mosebach Manufacturing Company | Resistor grid assembly having "U" bend resistor elements |
GB2323479A (en) * | 1997-03-19 | 1998-09-23 | Eaton Ltd | Mounting resistor elements |
DE29706870U1 (de) * | 1997-04-16 | 1997-06-05 | Behr Gmbh & Co | Elektrische Heizeinrichtung, insbesondere für ein Kraftfahrzeug |
DE10048424A1 (de) * | 2000-09-29 | 2002-04-18 | Bsh Bosch Siemens Hausgeraete | Heizelement und Verfahren zur Herstellung eines Heizelements |
DE20108585U1 (de) * | 2001-05-21 | 2002-10-02 | Rubitherm Gmbh | Elektrische Fußbodenheizung und Temperatursicherungsleiter |
FR3015351B1 (fr) * | 2013-12-23 | 2016-02-05 | Michelin & Cie | Enveloppe de pneumatique comprenant une carcasse, une bande de roulement et une couche de chauffage |
US10748679B2 (en) * | 2017-04-25 | 2020-08-18 | Yazaki Europe Limited | Power resistor |
DE102020111987A1 (de) * | 2020-05-04 | 2021-11-04 | Kraftanlagen München Gmbh | Heizeinrichtung, Heizsystem, Wärmespeichervorrichtung und Wärmespeichersystem |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1233183A (en) * | 1916-06-05 | 1917-07-10 | Gen Electric | Electrical heating unit and method of making the same. |
US2162030A (en) * | 1930-04-21 | 1939-06-13 | Capstan Glass Co | Heating device for glass lehrs and the like |
US1923644A (en) * | 1932-01-11 | 1933-08-22 | Pittsburgh Res Corp | Electric heating furnace |
DE650676C (de) * | 1934-08-31 | 1937-09-29 | Bbc Brown Boveri & Cie | Bandheizkoerper fuer elektrische Widerstandsoefen |
US2736786A (en) * | 1953-11-12 | 1956-02-28 | Bois Robert E Du | Resistor structure |
US2812410A (en) * | 1955-05-16 | 1957-11-05 | Robert E Dubois | Resistor structure |
US2858402A (en) * | 1956-04-27 | 1958-10-28 | Euclid Electric & Mfg Company | Forced ventilated resistor stack |
GB1132965A (en) * | 1964-12-01 | 1968-11-06 | Eisler Paul | Improvements in the manufacture of patterns of slits in a web |
US3673387A (en) * | 1971-02-22 | 1972-06-27 | Emerson Electric Co | Electric heaters |
AT354579B (de) * | 1971-11-03 | 1979-01-10 | Lueder Holger Dr | Einrichtung zur elektrischen grossflaechen- heizung und verfahren zu ihrer herstellung |
IN139058B (fr) * | 1974-06-21 | 1976-05-01 | Mosebach Mfg Co | |
US4051452A (en) * | 1975-08-18 | 1977-09-27 | Cutler-Hammer, Inc. | Annular resistor |
DE2625087A1 (de) * | 1976-06-04 | 1977-12-15 | Fritz Ing Grad Kraehmer | Verschliesseinrichtung fuer kuenstliche darmausgaenge |
CH613329A5 (en) * | 1977-01-05 | 1979-09-14 | Petz Elektro Waerme Techn | Resistance heating element for a heating device |
US4100526A (en) * | 1977-02-24 | 1978-07-11 | Mosebach Manufacturing Company | Grid resistor |
US4146868A (en) * | 1978-02-28 | 1979-03-27 | Mosebach Manufacturing Company | Resistance unit structure |
FR2471721A1 (fr) * | 1979-12-11 | 1981-06-19 | Seb Sa | Element resistant chauffant decoupe pour radiateur electrique domestique, procede de fabrication et radiateur s'y rapportant |
US4316172A (en) * | 1980-06-25 | 1982-02-16 | Eaton Corporation | Resistor such as for dynamic braking of electric motors |
US4477715A (en) * | 1982-07-19 | 1984-10-16 | Technar Incorporated | PTC thermistor controlled electric diesel fuel heater |
-
1983
- 1983-08-03 DE DE19833328078 patent/DE3328078A1/de active Granted
- 1983-08-03 DE DE19838322435U patent/DE8322435U1/de not_active Expired
-
1984
- 1984-07-23 US US06/633,413 patent/US4553126A/en not_active Expired - Fee Related
- 1984-07-25 EP EP84108800A patent/EP0135704B1/fr not_active Expired
- 1984-08-03 JP JP59164164A patent/JPS6059690A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
DE3328078C2 (fr) | 1989-02-16 |
JPS6059690A (ja) | 1985-04-06 |
US4553126A (en) | 1985-11-12 |
DE8322435U1 (de) | 1985-05-30 |
DE3328078A1 (de) | 1985-02-21 |
EP0135704A1 (fr) | 1985-04-03 |
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