SE183405C1

SE183405C1 -

Info

Publication number: SE183405C1
Application number: SE1035958A
Authority: SE
Inventors: Gunnar Larsson
Original assignee: Uddeholms Ab
Priority date: 1962-05-30
Filing date: 1958-11-07
Publication date: 1963-04-30
Also published as: GB960975A

Abstract

960,975. Plate-type heat exchangers. UDDEHOLMS A.B. May 30, 1962, No. 20777/62 Heading F4S. A heat exchanger element comprises two metal sheets 1 and 2, each formed with two parallel longitudinal rows of depressions 3 separated by a land 5, the sheets being. placed face to face and sealed around their marginal edges 4 and along the land, the overlying depressions forming two continuous zig-zag channels extending along the length of the rows, an inlet and outlet being provided at one end of the rows while the opposite end has a common depression 8 which provides communication between the two zig-zag channels. As shown, depressions 3 in the two sheets are in the form of equally spaced troughs of the same shape and size. The element may be bent longitudinally to provide a non-planar unit in the shape e.g. of a circle, a spiral (Fig. 4, not shown), a cylinder, a square or a zig-zag configuration. Several elements may be connected in series.

Description

Uppfinnare: G Larsson Foreliggande uppfinning hanfiir sig till ett varmevaxlingsetement, sammansatt av tva langstrackta platdelar, vardera forsedd med minst en rad efter varandra placerade ekvidistanta fOrsankningar utmed platens langd, varvid de hada plaldelarna aro vanda mot varandra och forenade utmed sina sidokanter under sadan inbordes forskjutning, att varje fOrsankning i den ena platdelen overlap-par tva forsankningar i den andra platdelen till bildande av en sammanhangande, i sick-sack lopande kanal for upptagande av kylande eller varmande medium. Inventor: G Larsson The present invention relates to a heat exchange element, composed of two elongate plate parts, each provided with at least one row of equidistant recesses placed one after the other along the length of the plate, the had plate parts being facing each other and joining along their side edges inwardly. , that each recess in one plate part overlaps two depressions in the other plate part to form a continuous, zigzagging channel for receiving cooling or heating medium.

Tidigare aro varmevaxlingselement av ovannamnda typ kanda, dar forsankningarna ha formen av i vardera platen utpressade halvsfariska gropar. Det av tva sadana platar hopfogade varmevaxlingselementet blir emellertid till foljd av forsankningarnas utformning sa forstyvat, att flagon namnvard bojning av elementet i dettas langthiktning ej blir mojlig utan anbringande av en myeket stor kraft, i vilket fall materialet blir utsatt for sâ stora deformeringskrafter, att materialet brister eller i varje fall forsvagas i riskabel grad. Previously, heat exchange elements of the above-mentioned type are known, where the depressions have the shape of semi-dangerous pits extruded in each plate. However, due to the design of the recesses, the heat exchange element joined by two such plates becomes so stiff that the nominal bending of the element in its longitudinal attachment is not possible without the application of a very large force, in which case the material is subjected to such large deformation forces that the material deficiencies or in any case weakened to a risky degree.

Detta är en stor olagenhet, eftersom varmevaxlingselement av ovannamnda enkla sjalvharande typ kunna utnyttjas optimalt forst om de i langdled utan storre besvar kunna bockas till relativt sma. krokningsradier med bibehallen mekanisk hallfasthet. Harigenom kin en enda elementslinga »Tunas» till rund eller kantig spiralform, rektangular farm eller overhuvudtaget givas en konfiguration, som kraver ett minimum av utrymme och dessutom kan anpassas till formen hos redan givna utrymmen, dar rorslingor eller andra varmevaxlingsanordningar ej skulle fa plats. This is a major inconvenience, since heat exchange elements of the above-mentioned simple self-supporting type can only be utilized optimally if they can be bent to relatively small lengths without major responses. hooking radii while maintaining mechanical hall strength. This allows a single element loop to be "tuned" to a round or angular spiral shape, rectangular farm or even given a configuration that requires a minimum of space and can also be adapted to the shape of already given spaces where rudder loops or other heat exchange devices would not fit.

Varmevaxlingselementet enligt uppfinningen fyller detta krav, och kannetecknas darav, att forsankningarna i varje platdel ha for-men av vinkelratt mot den langstrackta plat delens langdriktning lopande trag eller ran-nor med kontinuerligt valvd tvarsektion for mOjliggorande av en efterfoljande bockning av elementet i dettas langdriktning. The heat exchange element according to the invention meets this requirement, and is characterized in that the recesses in each plate part are in the form of angles directed towards the longitudinal direction of the elongate plate part or ridges with continuously curved cross section to enable a subsequent bending of the element in its longitudinal direction.

Uppfinningen beskrives narmare nedan under hanvisning till bifogade ritning, dar fig. 1 visar en plan.vy av en foredragen utforingsform av ett varmevaxlingselement enligt uppfinningen, fig. 2 visar en tvarsektion av elementet utmed linjeni fig. 1, fig. 3 en sidovy av elementet i fig. 1 saint fig. 4 en ovanifran sedd vy av en praktisk konfiguration for en varmevaxlare, som innehaller element enligt fig. 1-3. The invention is described in more detail below with reference to the accompanying drawing, in which Fig. 1 shows a plan view of a preferred embodiment of a heat exchange element according to the invention, Fig. 2 shows a cross section of the element along the line in Fig. 1, Fig. 3 a side view of the element in Fig. 1 Saint Fig. 4 is a top view of a practical configuration for a heat exchanger, which contains elements according to Figs. 1-3.

Pet i fig. 1-3 visade varmevaxlingselementet an upplayggt av tva metallplatar 1 och 2, exempelvis av rostfritt stal. I varje plat ha tva parallella rader mot platens langdriktning vinkelratt lopan.de tragliknande nedpressningar 3 med vasentligen eirkelbagsformad tvarsektion utforts, varvid sa.val platarnas kantpartier 4 som det nedpressningsraderna skiljande partiet 5 lamnats plant och orort. De salunda formade platarna aro helt identiska med undantag av andpartiema. Platens 1 hada langst till vanster i fig. 1 och 3 liggande utpressningar 3a och 3b aro vardera fOrsedda med Oppningar 6a och 6b samt till dessa anslutancle rorstutsar 7a resp. 7h. Vid platens 1 motsatta, dvs. dess i figurerna hogra ande finnes en enda, de bada nedpressningsraderna overbryggande nedpressning 8. Betraffande platen 2 aro dennas andpartier 9a och 9b halt plana. The figure in Figures 1-3 shows the heat exchange element laid up by two metal plates 1 and 2, for example of stainless steel. In each plate, two parallel rows towards the longitudinal direction of the plate perpendicular to the trough-like depressions 3 with a substantially circular bag-shaped transverse section have been performed, leaving both the edge portions 4 of the plates and the portion 5 separating the depressing rows left flat and intact. The salvo-shaped plates are completely identical with the exception of the duck portions. The plates 1a and 3b lying farthest to the left in Figs. 1 and 3 are each provided with openings 6a and 6b and to these connecting pipe connections 7a and 6b, respectively. 7h. At plate 1 opposite, ie. its in the figures hograde there is a single, the two rows of depressions bridging depression 8. Concerning the plate 2, its duck portions 9a and 9b are smoothly flat.

Av fig. 3 framgar, att de hada platarna aro kantvis hopfogade, fOretradesvis genom svetsning, med sina respektive nedpressningar 3 en halv delning forskjuten relativt varandra till bildande av tva parallella, i sick-sack lopande kanaler i platparets langdriktning. Ett kyl- eller varmemedium kan dá tillforas genom den ena rOrstutsen, t. ex.. 7a, och after passage genom de namnd'a kanalerna via det dessa Overbryggande partiet 2— — 8 uttages frau den andra, narliggande stutsen 7b. Genom detta arrangemang erhalles salunda en till konstruktionen enkel och stabil, sjalvbarande varinevaxlingsenhet med en turbulensbeframjande och darmed effektstegrande kanalstrackning samt mkt tillgangliga in- och utloppsstutsar. From Fig. 3 it can be seen that the hot plates are joined together edgewise, preferably by welding, with their respective depressions 3 a half pitch offset relative to each other to form two parallel, zigzagging channels in the longitudinal direction of the plate pair. A cooling or heating medium can then be supplied through one of the pipe sockets, e.g. 7a, and after passage through the named channels via the these bridging portion 2-8 is removed from the other, adjacent socket 7b. This arrangement thus provides a simple and stable, self-sustaining varying gear unit for the construction with a turbulence-promoting and thus power-increasing channel stretching and very accessible inlet and outlet nozzles.

Pk grand av de i elementets langdled flexibla segment, som de tragliknande utpressningarna 3 bilda, kan elementet utan svarighet bojas eller bockas i langdled utan att materialet utsattes for extra pakanningar eller veckbildande deformationer. En bockning innebar endast en flackning av tragens valvning pa bockens utsida och motsvarande resning av valvningen pa bockens insida. Sam exempel kan anforas att vid elementet av den visade typen av 1 mm stalplat och c:a 20 cm bredd bockningsradier anda ned till 15 cm anvants Tried gott resultat. Due to the flexible segments in the longitudinal element of the element, which the trough-like extensions 3 form, the element can be bent or bent longitudinally without being subjected without the material being subjected to extra packing or creasing deformations. A bend meant only a flattening of the arch of the trough on the outside of the buck and a corresponding raising of the arch on the inside of the buck. The same example can be given that with the element of the shown type of 1 mm steel plate and about 20 cm wide bending radii spirit down to 15 cm, Tried good result was used.

I fig. 4 visas hur denna bockningsmojlighet praktiskt kan utnyttj as for bildande av en ytterst kompakt och stabil varmevaxlare. Derma är helt enkelt framstalld genom spirallindning av ett enda element av den i fig. 1-3 visade typen. Ifragavarande kyl- eller varmemedium tillfores och uttages via de vid spiralytteranden liggande rOrstutsarna (endast den ena 7b synlig). Pa grund av elementets sjalvbarande karaktar tryggas spiralkonfigurationens stadga pa enkelt satt med hjalp av ett fatal lampligt placerade, elementvarvens kanter inbordes forbindande radiella stagtradar eller band 10. Alltefter behov kunna flera elementspiraler staplas koncentriskt pa varandra och det enas utlopp forbindas med nastfoljande inlopp till bildande av en enda kyl- eller varmeslinga. Fig. 4 shows how this bending possibility can be practically used to form an extremely compact and stable heat exchanger. This is simply produced by spiral winding of a single element of the type shown in Figs. 1-3. The cooling or heating medium in question is supplied and removed via the pipe sockets located at the spiral surface (only one 7b is visible). Due to the self-sustaining nature of the element, the stability of the spiral configuration is easily secured by means of a fatal lamp, the edges of the element turns are connected to radial braces or bands 10. As required, several element spirals can be stacked concentrically on each other and one outlet connected to the next inlet. a single cooling or heating coil.

Uppfinningen Or givetvis ej begransad till de ovan angivna typexemplen, utan olika modifikationer och utbyggnader kunna tankas inona uppfinningens ram, alit efter andamalet och omstandigheterna. Salunda skulle flera an tva parallella rader nedpressningar kunna foretagas i en platriktning. I vissa fall kan daremot en enda rad vara att foredraga med in- och utlopp vid motsatta andar av elementet. Likasa kan givetvis elementet (eller elementen) bojas i annan form an den visade spiralkonfigurationen, exempelvis cylindrisk, kvadratisk, sick.sack etc. En star fordel med varmevaxlingselementet enligt uppfinningen är just dess stora anpassbarhet till onskade eller givna utrymmen av de mest skilda former och storlekar. The invention is of course not limited to the type examples given above, but various modifications and extensions can be considered within the scope of the invention, depending on the spirit and circumstances. Thus, several or two parallel rows of depressions could be made in one plate direction. In some cases, however, a single line may be preferable with inlets and outlets at opposite spirits of the element. Likewise, the element (or elements) can of course be bent in another shape than the spiral configuration shown, for example cylindrical, square, zigzag etc. A major advantage of the heat exchange element according to the invention is its great adaptability to desired or given spaces of the most different shapes and sizes.

Claims

Patent claim:

Heat exchange elements, composed of two elongate plate parts, each provided with at least one row of equidistant recesses placed one after the other along the length of the plate, the hot plate parts overlaps Ivo. recesses in the second plate part to form a continuous, zigzagging channel for receiving cooling or heating medium, characterized in that the recesses (3) in each plate part (1 and 2, respectively) have the shape of a stepping knob towards the longitudinal direction of the elongate plate part. troughs or gutters with continuously curved cross-section to enable a subsequent bending of the element in its longitudinal direction.

Element according to claim 1, wherein each plate part has at least a pair of parallel rows of recesses forming two iron-side scratching channels, characterized in that the had channels at their one end are united by means of one of the had outer recesses in at least one plate part bridging recess (8), so that a single continuous loop is formed with inlet and outlet (6a and 6b, respectively) in the second spirit of the channels.

Element according to claim 2 with two parallel channels, characterized in that it forms in an element stack of identical elements, wherein its inlet Or is connected to the outlet of a preceding element, while its outlet Or is connected to the inlet of a subsequent element to form of a single loop through the entire element stack. Anforcla publications: Patentskrifter treat Danmark 50 783; United Kingdom 256,693; Germany 826445, 953978; USA 705614, 1 823 788. Stockholm 063. Kungl. Boktr. P. A. Norstedt & Stiner. 630D89 r ••• cf) 0 0111 •••• IL GENERALSTABENS L