DK145070B

DK145070B - DEVICE FOR THE DETERMINATION OF A TUBE-ELECTRIC HEATING ELEMENT

Info

Publication number: DK145070B
Application number: DK394476AA
Authority: DK
Inventors: L E J Carlsson
Original assignee: Carlsson Lars Erik Jan
Priority date: 1975-09-02
Filing date: 1976-09-01
Publication date: 1982-08-16
Also published as: SE7509753L; DK394476A; FR2323105A1; NO143724C; DK145070C; FR2323105B3; SE413169B; NO143724B; NO762983L

Description

i 145070 1 Opfindelsen angår en anordning til fastgørelse af et rørformet elektrisk varmeelement til et konvektorpanel eller lignende i hovedsagen parallelt med panelet ved hjælp af mindst to bladfjedre, hvis ene ende er fast-5 gjort til panelet.The invention relates to a device for attaching a tubular electric heating element to a convector panel or the like, substantially parallel to the panel, by means of at least two leaf springs, one end of which is fixed to the panel.

Por såvel fagmænd som almenheden er det velkendt, at der fremkommer forstyrrende lyd i form af knæk og lignende i forbindelse med opvarmning og afkøling af op-10 varmningselementet i en el-konvektor. Nævnte lydfæno mener forstærkes yderligere af konvektorpanelet, der fungerer som en resonansflade. Med henblik på at overvinde nævnte problem, forårsaget af opvarmningselementets dimensionsforandringer ved temperaturforandrin-15 ger er der blevet foreslået forskellige løsninger med hensyn til fastgørelsen eller monteringen af opvarmningselementet. Det nævnte element, der sædvanligvis er U-formet og langstrakt, monteres sædvanligvis lyddæmpet mod konvektorpanelet ved de åbne endedele med 20 et afstandsstykke, der er fast anbragt mod konvektorpanelet, og en overdel, der fastgøres til afstandsstykket ved hjælp af en skrue- eller nitteforbindelse.It is well known to those skilled in the art as well as to the general public that disturbing sound in the form of cracks and the like appears in connection with heating and cooling of the heating element in an electric convector. Said sound pheno is further enhanced by the convector panel, which acts as a resonant surface. In order to overcome said problem, caused by the heating element's dimensional changes in temperature changes, various solutions have been proposed with regard to the fixing or mounting of the heating element. Said element, which is usually U-shaped and elongated, is usually mounted attenuated against the convector panel at the open end portions with a spacer fixedly attached to the convector panel and an upper member secured to the spacer by a screw or rivet connection. .

Den lukkede del af opvarmningselementet fastgøres på tilsvarende måde mellem et afstandsstykke og en over-25 del, idet dog afstandsstykket er fjedrende monteret mod konvektorpanelet, med henblik på at tillade en begrænset bevægelse i længderetningen af opvarmningselementet .The closed part of the heating element is similarly secured between a spacer and a top part, however, the spacer is resiliently mounted against the convector panel, to allow a longitudinal movement of the heating element.

30 Den nævnte kendte fremgangsmåde, der anvendes almindeligt, medfører imidlertid ikke, at de forstyrrende lydfænomener fjernes helt. I forbindelse med, at dot bevægelige afstandsstykke med tilhørende overdel forskydes i forhold til konvektorpanelet, opstår der stadigvæk 35 forstyrrende lyde, der overføres til konvektorpanelet U5070 2 1 gennem det fjedrende organ, der forbinder afstandsstykket med nævnte panel. En yderligere ulempe er, at forud kendte fastgørelsessystemer kun er bestemt til at optage opvarmningselementets længdeforandringer, da ele-5 mentet er lyddaanpende fastgjort mellem afstandsstykket med tilhørende overdel. Ved opvarmning og afkøling af opvarmningselementet fremkommer der diameterforandringer, der dels medfører en plastisk deformering af overdelen og afstandsstykket, dels også træthedsvirkning af 10 nævnte organer. Dette medfører, at elementet efter en tids anvendelse ikke længere holdes fast mellem afstandsstykke og overdel, d.v.s. elementet kan glide i forhold til nævnte dele. En sådan forskydning af elementet i forhold til fastgørelsesdetaljerne medfø-15 rer naturligvis, at der fremkommer yderligere forstyrrende lydfænomener. En ikke uvæsentlig ulempe ved forud kendte fastgørelsesorganer er endvidere, at disse dels medfører en forholdsvis høj produktionsomkostning, samt også en høj monteringsomkostning. I de til-20 fælde, hvor nitteforbindelse anvendes til at forbinde afstandsstykke med overdel, fremkommer der naturligvis tillige åbenbare vanskeligheder, når et defekt element skal udskiftes. Selv om der anvendes skrueforbindelse, hvilket naturligvis medfører en højere frem-25 stillings- og monteringsomkostning, kan visse vanskeligheder fremkomme i forbindelse med fjernelsen af o-verdelene fra afstandsstykkerne.30 However, the known method commonly used does not mean that the disturbing sound phenomena are completely removed. As the movable spacer with associated upper part is displaced relative to the convector panel, 35 interfering noises are still transmitted to the convector panel U5070 2 1 through the resilient member connecting the spacer to said panel. A further disadvantage is that prior art fastening systems are only intended to accommodate the length changes of the heating element, since the element is sound attenuated between the spacer and associated upper part. Upon heating and cooling of the heating element, changes in diameter occur, which partly results in a plastic deformation of the upper part and the spacer, and partly also the fatigue effect of the said means. This means that after a period of use, the element is no longer held between spacer and upper part, i.e. the element may slide relative to said parts. Such a displacement of the element relative to the fastening details naturally causes further disturbing sound phenomena to emerge. Furthermore, a not insignificant disadvantage of prior art fasteners is that they partly result in a relatively high production cost, as well as a high mounting cost. Of course, in the cases where riveted joints are used to connect spacer to upper part, obvious difficulties also appear when a defective element is to be replaced. Although screw connection is used, which of course results in a higher manufacturing and assembly cost, some difficulties may arise in removing the o-portions from the spacers.

Det er opfindelsens formål at afhjælpe de nævnte 30 ulemper, og dette opnås ved, at hver fjeder er bøjet til i det væsentlige S-form og har en mod en kant åben udsparing mellem bøjningsstederne for at optage elementet med spillerum, at hver fjeder er indrettet til at fastspænde elementet mellem en kant ved ud-35 sparingen og en kant ved fjederens frie ende, og ind- 3 1Λ5070 1 rettet til ved sammenklemning ved det bøjningssted, som er beliggende længst fra den frie ende, at tillade indføring af elementet i udsparingen uden hindring af den frie ende af fjederen.It is an object of the invention to alleviate the aforesaid disadvantages and this is achieved by the fact that each spring is bent into a substantially S-shape and has a recess openly against an edge between the bending points to accommodate the element with clearance, that each spring is arranged for clamping the element between an edge at the recess and an edge at the free end of the spring, and arranged to allow insertion of the element into the recess by squeezing at the bending point farthest from the free end. without obstruction of the free end of the spring.

55

Herved opnås et særdeles enkelt fastgørelsesorgan, hvilket i kombination med en meget kort monterings-og demonteringstid nedbringer fremstillings- og monteringsomkostningerne. Endvidere opnås det, at fastgø-10 relsesanordningen støjmæssigt er upåvirkelig af U:mpe-raturforandringer, da fastgørelsen er fjedrende og kan optage diameterforandringer fra et rørformet elektrisk varmeelement.This results in a very simple fastening device, which in combination with a very short assembly and disassembly time, reduces the manufacturing and assembly costs. Further, it is achieved that the fastener is noiselessly affected by U: temperature changes, as the fastener is resilient and can accommodate diameter changes from a tubular electric heating element.

15 Opfindelsen vil i det følgende blive nærmere beskrevet under henvisning til tegningen, hvor fig. 1 viser et perspektivisk billede af et konvek-torelement med fire fastgørelsesorganer ifølge opfindelsen, 20 fig. 2 den i fig. 1 viste fastgørelsesanordning set fra siden, fig. 3 den i fig. 2 viste fastgørelsesanordning set i retning af III-III i fig. 2, fig. 4 fastgørelsesanordningen ifølge fig. 1-5 med 25 et element i fastgjort stilling, set fra siden, fig. 5 et billede svarende til fig. 3, men med et e-lement i fastgjort stilling, og fig. 6 anordningen i fig. 5 set i retning af VI-VI.The invention will now be described in more detail with reference to the drawing, in which: 1 is a perspective view of a convector element with four fasteners according to the invention; FIG. 2 is the one shown in FIG. 1 is a side view of the fastener; FIG. 3 shows the one shown in FIG. 2 in the direction of III-III in FIG. 2, FIG. 4 the fastening device according to FIG. 1-5 with 25 an element in an attached position, seen from the side; 5 is a view similar to FIG. 3, but with an e-element in the fixed position, and fig. 6 the device of FIG. 5 seen in the direction of VI-VI.

30 på tegningen betegner 1 et U-formet elektrisk element med cylindrisk tværsnit bestemt til at fastgøres mod den indvendige flade af et konvektorpanel. Fastgørelsesorganet udgøres i den viste udførelsesform af en del 2, der ligger an mod konvektorpanelet og som kan 35 fastgøres på panele^ fortrinsvis ved punktsve,inning. Fra 4 145070 1 nævnte fastgørelsesdel 2 strækker der sig en støttedel 3 i hovedsagen lodret opad, hvilken overgår i en skråt nedad og bort fra fastgørelsesdelen 2 rettet, fjedrende del 4, der ved sit nedre endeparti overgår 5 i en ombøjet del 5. Nævnte ombøjede dels 5 ydre periferi er anbragt i en afstand mindre end afstanden fra foreningspunktet mellem støttedelen 3 og den skråt nedad rettede del 4 til fastgørelsesplanet, hvorved nævnte periferi ikke får kontakt med fastgørelsespla-10 net, selv om den skråt nedad rettede del 4 bringes til at indtage en stilling parallelt med eller hældende i • retning mod støttedelen 3.30 in the drawing, 1 denotes a U-shaped electric element of cylindrical cross-section intended to be secured to the interior surface of a convector panel. In the illustrated embodiment, the fastener is constituted by a portion 2 abutting the convector panel and which can be fixed to panels preferably by spot welding. From the mounting portion 2 mentioned in 4, a support portion 3 extends substantially vertically upwardly, which extends in a downwardly inclined, springing portion 4 directed away from the attachment portion 2, which at its lower end portion 5 extends into a bent portion 5. Said bent the outer periphery of part 5 is spaced less than the distance from the junction of the support member 3 with the inclined downwardly directed portion 4 to the attachment plane, whereby said periphery does not contact the attachment plane, although the inclined downwardly directed portion 4 is caused to take a position parallel to or inclined in the • direction towards the support part 3.

Den mod konvektorpanelet liggende fastgørelsesdel 2 15 og den nedre del af den fjedrende del 4, samt den ombøjede del 5j har en væsentligt større bredde end den øvre del af den fjedrende del 4 og støttedelen 3. En kvadratisk eller rektangulær udsparing 6 er udformet ved den brede del af den fjedrende del 4, åben i ret-20 ning mod kantpartiet. Endvidere er en cirkelsegment- formet udsparing 7 udformet ved den ombøjede dels kantparti med en radius mindre end radius af det element 1, der skal fastgøres. Nævnte cirkelsegmentformede udsparing 7 er bestemt til at samvirke med den kvadra-25 tiske eller rektangulære udsparings 6 øvre kantparti og er derfor anbragt centralt i forhold dertil.The attachment portion 2 15 and the lower portion of the resilient portion 4 and the bent portion 5j have a substantially greater width than the upper portion of the resilient portion 4 and the support portion 3. A square or rectangular recess 6 is formed at the wide portion of the resilient portion 4, open in the direction of the edge portion. Furthermore, a circular segment-shaped recess 7 is formed at the edge portion of the bent portion with a radius less than the radius of the element 1 to be attached. Said circular segment-shaped recess 7 is intended to cooperate with the upper edge portion of the square or rectangular recess 6 and is therefore centrally positioned thereon.

I fig. 2 vises med brudte linier afstanden mellem den kvadratiske eller rektangulære udsparings 6 øvre kant-30 parti og det n'edre punkt i den cirkelsegmentformede udsparing 7, når anordningen er i upåvirket stilling.In FIG. 2 is a broken line showing the distance between the upper edge portion 30 of the square or rectangular recess 6 and the lower point of the circular segmental recess 7 when the device is in the unaffected position.

Nævnte afstand er herved betydeligt mindre end diameteren af det element 1, der skal fastgøres i anordningen.Said distance is hereby considerably smaller than the diameter of the element 1 to be fixed in the device.

35 145070 5 1 I fig. 1 er der vist et typisk anvendelseseksempel med fire fastgørelsesanordninger, der danner fastgørelsesorganer for et U-formet element 1 med cirkulært tværsnit. Herved bør det noteres, at fastgørelsesorganer 5 ved henholdsvis den lukkede og den åbne del af elementet 1 er udformet spejlvendt i forhold til hinanden.In FIG. 1, there is shown a typical application example with four fasteners forming fasteners for a U-shaped member 1 of circular cross section. Hereby, it should be noted that fasteners 5 are designed to be mirrored in relation to each other at the closed and open part of the element 1, respectively.

Herved optages på en mere fordelagtig måde elementets 1 længdeforøgelse i forbindelse med opvarmning.Hereby, in a more advantageous manner, the length increase of the element 1 is absorbed in connection with heating.

10 Ved fastgørelse af et element 1 anbringes f.eks. en holder over fastgørelsesorganerne, med henblik på at bringe den fjedrende del 4 til en stilling i nærheden af støttedelen 3- Elementet 1 indføres derefter fra siden af fastgørelsesorganerne, hvorefter 15 holderen fjernes. Herved fastholdes elementet 1 fjedrende mellem det øvre plan i udsparingen 6 i den fjedrende del 4 og to punkter ved den ombøjede dels 5 ydre kantparti. Nævnte to anligningspunkter dannes ved den ombøjede dels 5 kantparti ved, at den 20 cirkelsegmentformede udsparing 7 er udformet med en radius mindre end radius af det fastgjorte element 1. Elementet 1 holdes således i hvert fastgørelsesorgan mellem tre punkter, hvoraf de to nedre, der er skarpe, delvis trænger ind i elementet 1.10 When attaching an element 1, e.g. a holder over the fasteners to bring the resilient member 4 to a position in the vicinity of the support member 3- The element 1 is then inserted from the side of the fasteners, after which the holder is removed. Hereby the element 1 is resiliently held between the upper plane of the recess 6 in the resilient part 4 and two points at the outer edge portion of the bent part 5. Said two abutment points are formed at the edge portion of the bent portion 5 in that the 20 circular segmental recess 7 is formed with a radius less than the radius of the fastened element 1. The element 1 is thus held in each fastener between three points, the two lower ones being sharp, partially penetrating element 1.

2525

De længdeforandringer, der fremkommer ved opvarmningen af elementet 1, angivet ved pile i fig. 1, optages helt og holdent af den fjedrende dels 4 bevægelse i forhold til støttedelen 3- Fremkommende diameter-30 forandringer optages ved, at den ombøjede del 5 udgør et fjedrende fastgørelseselement.The length changes resulting from the heating of the element 1, indicated by arrows in FIG. 1, the movement of the resilient member 4 is completely absorbed relative to the support member 3- The resulting diameter changes are accommodated by the resilient member 5 forming a resilient fastener.

Ved montering af lange elementer 1 anvendes med fordel yderligere to fastgørelsesanordninger ud over, hvad 35 der er vist i fig. 1. Nævnte to yderligere fastgørel- 6 145070 1 sesanordninger anbringes herved med fordel centralt mellem de to viste parvist anbragte anordninger. Naturligvis kan også yderligere fastgørelsesanordninger i visse tilfælde anvendes.When installing long members 1, two additional fasteners are advantageously used in addition to what is shown in FIG. 1. The two additional fasteners are hereby conveniently placed centrally between the two devices shown in pairs. Of course, additional fasteners may also be used in some cases.

55

Hvis man anvender spejlvendte udførelser af fastgørelsesanordningen, f.eks. som vist på fig. 1, opnår man en lettere indføring af vameelementet 1 i fastgørelses-anordningerne, idet varmeelementet så kan indføres fra 10 samme side i alle fastgørelsesanordningerne.If mirrored designs of the fastener are used, e.g. as shown in FIG. 1, a easier insertion of the heater element 1 into the fasteners is achieved, the heater element then being able to be inserted from the same side in all the fasteners.

Den viste og beskrevne anordning ifølge den foreliggende opfindelse skal blot tjene som et eksempel på en egnet udførelsesform.The device shown and described in accordance with the present invention is merely to serve as an example of a suitable embodiment.

1515

Claims

145070

Apparatus for attaching a tubular electric heating element (1) to a convector panel or the like substantially parallel to the panel by means of at least two leaf springs, one end (2) of which is fixed 5 to the panel, characterized in that each spring is bent to a substantially S-shape and having a recess (6) open between the bending locations to receive the element (1) with clearance, each spring being arranged to clamp the element (1) between a 10 edge at the recess ( 6) and an edge at the free end of the spring, and arranged to allow, by squeezing at the bending point located furthest from the free end, the insertion of the element into the recess (6) without obstructing the free end of the spring. 15

Device according to claim 1, characterized in that at least one of the edges against which the element (1) is clamped is formed with a recess (7) for increasing the number of contact points against the fixed element (1). .

Device according to claim 2, characterized in that said recess (7) is circular segment-shaped with a radius smaller than the outer radius of the tubular element 25 (1).

Device according to one or more of claims 1 to 3, characterized in that the free end portions of the leaf springs are arranged such that they are directed to a nearby end portion of the tubular element (1).

Device according to claim 4, which is suitable for mirror-facing embodiments of the device