NO142102B - HEATER FOR ELECTRIC OVEN AND PROCEDURE FOR ITS MANUFACTURING - Google Patents
HEATER FOR ELECTRIC OVEN AND PROCEDURE FOR ITS MANUFACTURING Download PDFInfo
- Publication number
- NO142102B NO142102B NO762941A NO762941A NO142102B NO 142102 B NO142102 B NO 142102B NO 762941 A NO762941 A NO 762941A NO 762941 A NO762941 A NO 762941A NO 142102 B NO142102 B NO 142102B
- Authority
- NO
- Norway
- Prior art keywords
- slits
- transverse
- rib
- ribs
- heater
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 5
- 238000000034 method Methods 0.000 title abstract description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 3
- 239000002775 capsule Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 8
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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
- H05B3/40—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
Landscapes
- Resistance Heating (AREA)
- Surface Heating Bodies (AREA)
- Heat Treatment Of Articles (AREA)
- Forging (AREA)
Abstract
armelegeme for elektrisk ovn og fremgangsmåte til dets fremstilling.arm body for electric furnace and method of its manufacture.
Description
Den foreliggende oppfinnelse vedrører et varmelegeme The present invention relates to a heater
for en elektrisk ovn for romoppvarmning, og fremgangsmåte til dets fremstilling, omfattende metallkapsler, motstander og langsgående ribber som omgir motstandene, der det i ribbene finnes spalter. for an electric furnace for space heating, and method of its manufacture, comprising metal capsules, resistors and longitudinal ribs surrounding the resistors, in which there are slots in the ribs.
For å fremstille elektriske ovner for romoppvarmning To manufacture electric heaters for space heating
kan man, som vist i fig. 1-3 anvende et varmelegeme som be- one can, as shown in fig. 1-3 use a heater that be-
står av metallkapslede motstander 1 som er knyttet til varme-fordelere 3 av aluminium eller aluminiumlegeringer i form av ribber som går på langs av motstanden og omslutter denne,og som kan være utstyrt med forskjellige typer overflatebearbeid-elser 5 som skal forbedre varmeoverføringen og senke temperaturen på luften like ved ovnen for å forbedre brukerens komfort. consists of metal-encased resistors 1 which are connected to heat distributors 3 made of aluminum or aluminum alloys in the form of ribs that run along the length of the resistor and enclose it, and which can be equipped with different types of surface treatment 5 which will improve heat transfer and lower the temperature on the air close to the stove to improve user comfort.
Hovedulempene ved denne utførelse ligger i at det The main disadvantages of this design are that it
opptrer termiske differensialutvidelser mellom-metallkapslingen rundt motstanden og. varmefordeleren, fordi den lineære tempe-raturutvidelseskoeffisient i materialene er forskjellige^. differential thermal expansions occur between the metal enclosure around the resistor and. the heat distributor, because the linear temperature expansion coefficient in the materials are different^.
Dette fenomen blir viktigere når varmelegemene er lange, og det kan frembringe støy som er meget generende for brukeren. This phenomenon becomes more important when the heaters are long, and it can produce noise that is very annoying to the user.
Hensikten med oppfinnelsen er å gjøre det mulig å begrense verdien av den termiske utvidelse, uansett lengden på varmelegemet og dermed få den generende støy til å forsvinne. The purpose of the invention is to make it possible to limit the value of the thermal expansion, regardless of the length of the heater and thus make the annoying noise disappear.
Dette oppnås Ifølge oppfinnelsen ved at ribbene er According to the invention, this is achieved by the ribs being
dannet av en flat, stort sett rektangulær plate som er forsynt med tversgående sentrale spalter og sidespalter, hvilke spalter er i flukt med hverandre og er jevnt fordelt over hele ribbens lengde, der de ytre ender av sidespaltene ligger nær kantene av platen. formed by a flat, largely rectangular plate provided with transverse central slits and side slits, which slits are flush with each other and are evenly distributed over the entire length of the rib, the outer ends of the side slits being close to the edges of the plate.
Avstanden som skiller de nevnte tversgående spalter bestemmes som en funksjon av temperaturen, arten og utvidelseskoeffisienten i de forskjellige materialer som inngår i motstandene og fordelerne. The distance separating said transverse slots is determined as a function of the temperature, the nature and the expansion coefficient of the various materials included in the resistors and distributors.
Viktigheten av oppdeling av varmefordelerne ved tversgående spalter avhenger dels av typen materialer som av den overflatebearbeidelse som er foretatt i varmefordelerne av termiske grunner. The importance of dividing the heat distributors by transverse gaps depends partly on the type of materials and on the surface treatment carried out in the heat distributors for thermal reasons.
Oppdelingen som utføres gjør det mulig å begrense verdien av differensialutvidelsen ved at hvert element mellom to spalter representerer en redusert lengde som er uavhengig av resten av varmelegemet, i det nivå utvidelsene skjer. For-skyvningen mellom de to hoveddeler, motstanden og varmefordelerne kan derved gis en tilstrekkelig lav verdi til at hør-bar og generende støy forsvinner fullstendig. The division that is carried out makes it possible to limit the value of the differential expansion in that each element between two slots represents a reduced length that is independent of the rest of the heater, at the level at which the expansions occur. The displacement between the two main parts, the resistor and the heat distributors, can thereby be given a sufficiently low value that audible and annoying noise disappears completely.
Fremgangsmåten er karakterisert ved at det ved utstansingen formes flere adskilte, tversgående spalter på rekke før ribben gis sin endelige form, hvoretter det foretas gjennomhulling av ribben etterat denne først er blitt formet og festet til den metallkapslede motstand på en slik måte at de nevnte tversgående spalter kommer i flukt med hverandre. The method is characterized by the punching forming several separate, transverse slots in a row before the rib is given its final shape, after which the rib is pierced after it has first been shaped and attached to the metal-encased resistor in such a way that the said transverse slots come into conflict with each other.
Beskrivelsen i det etterfølgende refererer seg til de vedheftede tegninger er gitt som ikke begrensende eksempler og gjør det lettere å forstå oppfinnelsen. Fig. 1-3 viser, som allerede nevnt, perspektivskisser av tre tidligere fremgangsmåter for å fremstille varmelegemer. Fig. 4 er en perspektivskisse av en utførelse av et varmelegeme ifølge oppfinnelsen. Fig. 5 viser varmefordeleren i fig. 4 sett ovenfra, før den endelige er bearbeidet og formet og knyttet til motstanden . Fig. 6 viser den samme varmefordeler sett fra siden etter at den er formet og festet til motstanden og etterat den har fått den endelige bearbeidelse. The description in the following refers to the attached drawings, which are given as non-limiting examples and make it easier to understand the invention. Fig. 1-3 show, as already mentioned, perspective sketches of three previous methods for producing heating elements. Fig. 4 is a perspective sketch of an embodiment of a heater according to the invention. Fig. 5 shows the heat distributor in fig. 4 seen from above, before the final one is processed and shaped and attached to the resistance. Fig. 6 shows the same heat distributor seen from the side after it has been shaped and attached to the resistor and after it has received the final processing.
Som en ser av fig. 4-6 har et varmelegeme ifølge oppfinnelsen, som i tidligere utførelser, en metallkapslet motstand 1, og en varmefordeler 3 av aluminium eller aluminium-legering i form av langsgående ribber 7 og 9, festet til et sentralt parti 11 som går omkring motstanden 1, og som er knyttet til denne. På ribbene 7 og 9 kan det være foretatt visse bearbeidelser i metallet 5 av forskjellig form for å forbedre de termiske egenskaper ved varmeoverføringen og å As can be seen from fig. 4-6 has a heater according to the invention, as in previous embodiments, a metal-encased resistance 1, and a heat distributor 3 of aluminum or aluminum alloy in the form of longitudinal ribs 7 and 9, attached to a central part 11 which goes around the resistance 1, and which are linked to this. On the ribs 7 and 9, certain treatments may have been carried out in the metal 5 of different forms in order to improve the thermal properties of the heat transfer and to
senke temperaturen på luften som kommer fra varmeovnen. lower the temperature of the air coming from the heater.
Oppfinnelsen består i å oppdele varmefordeleren 3 i den sentrale del 11 som omgir motstanden 1 ved tversgående spalter 13 i fast avstand, som en funksjon av de karakteristiske egenskaper i de inngående materialer: temperaturen, arten materi- The invention consists in dividing the heat distributor 3 into the central part 11 which surrounds the resistor 1 by means of transverse slits 13 at a fixed distance, as a function of the characteristic properties of the constituent materials: the temperature, the type of material
aler og utvidelseskoeffisienten i materialene. alers and the coefficient of expansion in the materials.
En fremgangsmåte for å få frembrakt de tversgående A procedure for producing the transverse ones
spalter, såsom 13, består i å bringe tilveie et plant emne columns, such as 13, consist of providing a flat subject
(fig. 5), hvor det på stedene for de fremtidige spalter 13, forarbeides en tversgående spalte 13a i den sentrale del av emnet 11, og to spalter på tvers 13 og 13c i platene 7 og 9, (fig. 5), where in the places of the future slits 13, a transverse slit 13a is processed in the central part of the blank 11, and two transverse slits 13 and 13c in the plates 7 and 9,
som hver munner ut i de allerede forarbeidede utsparinger som 5, finnes i den tilsvarende platen. En viss materialbredde blir igjen mellom spaltene 13b og 13a og mellom spaltene 13a og 13c, noe som gjør det mulig å unngå for liten styrke i varmefordeleren, før den endelige forming og plassering foretas, noe som ville være tilfellet hvis man hadde latt spaltene 13 each of which opens into the already prepared recesses as 5, found in the corresponding plate. A certain width of material remains between the slots 13b and 13a and between the slots 13a and 13c, which makes it possible to avoid too little strength in the heat distributor, before the final shaping and placement is carried out, which would be the case if the slots 13 had been left
gå over i hverandre. merge into each other.
Ved at varmefordeleren 3 er blitt formet rundt motstanden 1 (fig. 6) vil spaltene på midten 13a være lukket rundt seg selv og spaltene på sidene 13b og 13c vil befinne seg over-for hverandre. Man gjør. inndelingen ferdig ved å stanse eller bore huller som 15 (f.eks. sylindriske) som knytter spaltene til hverandre ved å fjerne materiale som ligger mellom den.. As the heat distributor 3 has been shaped around the resistance 1 (Fig. 6), the slits in the middle 13a will be closed around themselves and the slits on the sides 13b and 13c will be located one above the other. One does. the division finished by punching or drilling holes such as 15 (e.g. cylindrical) that connect the slots to each other by removing material lying between it..
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7526977A FR2323108A1 (en) | 1975-09-03 | 1975-09-03 | Heating element for convector heater - has heat-exchange fins divided into sections along resistance wire |
Publications (3)
Publication Number | Publication Date |
---|---|
NO762941L NO762941L (en) | 1977-03-04 |
NO142102B true NO142102B (en) | 1980-03-17 |
NO142102C NO142102C (en) | 1980-07-02 |
Family
ID=9159580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO762941A NO142102C (en) | 1975-09-03 | 1976-08-26 | HEATER FOR ELECTRIC OVEN AND PROCEDURE FOR ITS MANUFACTURING. |
Country Status (8)
Country | Link |
---|---|
BE (1) | BE845785A (en) |
DE (1) | DE7626535U1 (en) |
DK (1) | DK394776A (en) |
ES (1) | ES451155A1 (en) |
FR (1) | FR2323108A1 (en) |
IT (1) | IT1082716B (en) |
NO (1) | NO142102C (en) |
SE (1) | SE419394B (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1535561A (en) * | 1976-01-23 | 1978-12-13 | Tugonia Ag | Heat exchanger for convector heater |
FR2428792A2 (en) * | 1978-06-16 | 1980-01-11 | Applic Thermo Electr | Acoustically damped electric heating panel - has fixed and floating clips to accommodate differential expansion of element and base |
FR2517501A1 (en) * | 1981-12-01 | 1983-06-03 | Promothermo Verwarmingtoepassi | Heat source for electric convection heater - uses diffuser formed from slotted strip cut along its length to permit alternate segments to be bent in opposite directions |
DE3312312A1 (en) * | 1983-04-06 | 1984-10-11 | Türk & Hillinger GmbH, 7200 Tuttlingen | Electric tubular heating element |
FR2580451A1 (en) * | 1985-04-16 | 1986-10-17 | Zaegel Held Sa | Heating resistor. |
DE3685001D1 (en) * | 1985-10-22 | 1992-05-27 | Deleage Sa | ELECTRIC HEATING CABLES. |
FR2608885B1 (en) * | 1986-12-23 | 1993-09-03 | Airelec Ind | HEATING ELEMENT FOR ELECTRIC APPARATUS, PARTICULARLY FOR CONVECTOR |
FR2764162B1 (en) * | 1997-05-27 | 2004-09-03 | Muller Et Cie | METHOD FOR PRODUCING SHIELDED ELECTRIC RESISTORS WITH MULTIPLE DISSIPATORS AND ELECTRIC RESISTORS THUS OBTAINED |
FR2936126B1 (en) * | 2008-09-17 | 2011-01-07 | Deleage Sa | THERMALLY CONDUCTIVE PROTECTIVE ENVELOPE OF A HEATING CABLE DEVICE |
DE102009013927A1 (en) * | 2008-12-19 | 2010-06-24 | Beru Ag | Electric heater |
-
1975
- 1975-09-03 FR FR7526977A patent/FR2323108A1/en active Granted
-
1976
- 1976-08-25 DE DE7626535U patent/DE7626535U1/en not_active Expired
- 1976-08-26 NO NO762941A patent/NO142102C/en unknown
- 1976-08-26 SE SE7609486A patent/SE419394B/en unknown
- 1976-08-31 IT IT69120/76A patent/IT1082716B/en active
- 1976-09-01 DK DK394776A patent/DK394776A/en not_active Application Discontinuation
- 1976-09-01 ES ES451155A patent/ES451155A1/en not_active Expired
- 1976-09-02 BE BE170299A patent/BE845785A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SE7609486L (en) | 1977-03-04 |
FR2323108A1 (en) | 1977-04-01 |
NO142102C (en) | 1980-07-02 |
IT1082716B (en) | 1985-05-21 |
BE845785A (en) | 1977-03-02 |
ES451155A1 (en) | 1977-08-16 |
SE419394B (en) | 1981-07-27 |
DE7626535U1 (en) | 1976-12-23 |
FR2323108B1 (en) | 1980-04-30 |
NO762941L (en) | 1977-03-04 |
DK394776A (en) | 1977-03-04 |
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