DE1451261A1 - Heat exchanger and process and device for its manufacture - Google Patents

Description

EBYIiOLDS METALS COMPANY ^ - * ^ «

6601 West Broad Street,

Hiohmondt Virginia / USA C OfC · ^ ** '"12/17/1964

Heat exchanger and process and device for its manufacture

The invention relates to a heat exchanger as well as a method and a device for its production. "

To make a heat exchanger from a hollow tubular piece through which cooling or heating means in the Circuit is funneled, with the outer peripheral wall of the hollow tubular part receiving the primary heat Forms taueohflache for heat conduction purposes is known.

In order to increase the heat dissipation of the circulating medium to the surrounding outside air, the outside air peripheral surface of the tube part cooling fins, which generally represent the secondary heat exchange surface, appropriate.

The fins forming the secondary exchange surfaces must be in close contact with the primary when they are full should be effective. However, the effective arrangement of the secondary to the primary exchange surfaces collides with the Mass production of heat exchangers on difficulties.

The present invention now aims to achieve the foregoing and also to overcome other difficulties and to create a heat exchanger which has the characteristics of high thermal conductivity having.

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The method according to the invention for manufacturing such a heat exchanger from a hollow tubular body with at least one outwardly directed web sitting on it consists of cutting, pulling and cutting the web Stretch to ribs larger surface area than that of the to shape the bar presented for the cut.

In the drawing, the invention is based on an example shown!

Bs shows:

Figo 1 shows one used to form a heat exchanger Blank in perspective j

Fig. 2 shows another shape of the blank j

Fig. 3 is a schematic perspective view of an apparatus for the conversion of the blank to a heat exchanger \

FIG. 4 shows a partial view of a further embodiment of the device according to FIG.

Fig. 5 is a "front view of that shown in Figs. 3 and 4" Tooth formation on the device j

6 shows a cross section along line VI-YI of FIG. 5J

7 shows a partial cross section along line VII-VII in FIG. 6j

Fig. 8 is a partial cross-section of the device in Fig. 3 shown in operation \

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Pig 9 a top view of the created heat exchanger) Pig. 10 is a side view of the Pig. 9 | Pig 11 a partial cross-section along line XI-XI of Pig. 1Of

Pig. 12 a top view of the heat exchanger according to the invention)

Pig 13 shows a partial cross-section along line XIII-XIII

the pig. 12 | 'ι

Pig. 14 a partial cross-section along line XIV-XIV of Pig. 13)

Pig. 15 shows a view according to Pig. 13 of an earlier manufacturing stage ι

Pig, 16 a top view of another heat exchanger design!

Pig · 17 a partial cross-section along line XVII-XVII of the Pig. 16 §

18 a partial view in section of an inventive heat exchanger arranged in an air duct)

Pig. 19 shows a cross section along line XIX-XIX of the Pig. 18)

Pig. 20 is a partial cross-section of a heating element embodying an electrical heating element according to the invention. exchanger)

21 shows an arrangement of heat exchangers in plan of a house or the like

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22 shows a further type of application of the invention. Heat exchanger in partial perspective $

! ig. 23 another type of application of the invention Heat exchanger j

! ig »24 a cross-section along line XXIV-XXIV of Pig. 23Y

fig · 25 a cross section through a household refrigerator Oodgl · with built-in heat exchanger according to the invention \

! ig. 26 a further embodiment of the Mg. 25 in section

Pig · 27 is a perspective view of that shown in Pig · 26 built-in parts j

Pig · 28 a further application of the heat exchanger according to the invention )

Pig. 29 a further embodiment of the heat exchanger according to the invention in cross section |

Pig · 30 a schematic view of the Pig. 29 in perspective j

Pig. 31 a further embodiment of the heat exchanger according to the invention in partial perspective f

Pig · 32 and 33 another embodiment of the Pig «31) Pig. 34 shows an embodiment according to Pig * 8 in view f

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The blank 40 which is used to manufacture a heat exchanger (see Pig. 1) is an elongated tubular Part 41 with one or more outwardly directed webs 42 which emerge from the surface 43 of the hollow body 41 protrude

During the Eohling 40 in any suitable manner and off may be formed of any suitable material, it is made from extruded material as shown in FIG manufactured, such as aluminum-containing material or the like. on a conventional extruder 44.

The blank used to form a heat exchanger, for example, has a tubular part 41 which has an outside diameter of 9.5 mm, the web 42 having a thickness of 0.9 mm for any length .

Like from Pig. 2, the webs 42A extend or taper from the outer surface of the tubular part 41A they extend from the pipe section 41A to the outer free edges of the web 42A. For example, is the outer diameter of the pipe section 41A »iae» 9 »5 mm and the webs 42 approximately 0.9 mm, its outer end can be reduced to a thickness of 0.5 mm

Even if the blank 40 or 40A in the drawing has only two diametrically opposed webs that of his tubular part 41 or 41A, of course It goes without saying that the method according to the invention can also be used in those cases in which it is only one or any Has number of bars that are attached to each other on its surface in any way

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The webs of the blank shaped in said manner are in divided a plurality of ribs, which remain connected to the pipe part as a whole and the desired secondary Form heat exchange surface.

The gears 47 and 48 shown in FIGS. 5-7 are essentially identical. The gearwheel 48 has a cylindrical bore 50 which allows it to be fastened with its hub 49 on a suitable shaft and to be held in place by adjusting screws seated in threaded bores 51 a guide plane when rotating the gear 48 when the gear rotates clockwise (see ", Fig. 5). Since the toothed wheel 47 rotates counterclockwise in Fig. 3, the arched Plank® 52 of each tooth represents a guide flank and the © bane Hauke 54 represents the run-off flank _o

Like in Pig. 8, each tooth 52 of the gearwheel 48 has a substantially beveled head 55s which cooperates with the flat flank 54 in such a way that a cutting edge 46 is formed edge 57 located line 58. the _O E ^'' of the tooth flank is substantially planar and parallel zur- Eüokflanke 54o

Each tooth is rounded on the face of the gearwheel «. The rounding 59 rests against the tubular body 41, while the opposite substantially flat surface 60 of the Gear is removed from the pipe section. In Fig. 7 this is Rounding 59 on the face of the gear can be clearly seen »

As shown in Fig. 8, the gear 47 rotates counterclockwise and the gear 48 clockwise so that the teeth 52 in the

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engage in one another as shown in this figure, the web 42 of the drilling part 41 engages between them and is guided from left to right, or the gears 47 and 48 are moved from right to left. while the Hohrsttick 41 is held immobile »

In both cases, the toothed wheels 47 and 48 bend the web 42 of the tubular part 41 cut into hips with their teeth 52 after uni3n · Since, however, the teeth 52a and 52b at the front of the bath 59 are arched or rounded (cf. FIG. 6), the part of the web 42 which adjoins the drill bit 41 is not bent downwards (see. Fig. 8). If the tooth 52c of the bath 48 engages in the manner shown in FIG. 8 between the Teeth 52b and 52d of gear 47, the tooth 52c begins to bend up the bevel, the edge 56 with the Flank 54 of tooth 52b cooperates in order to cut the individual ribs from the web

As the gears 47 and 48 continue to rotate, the lower part of each cut leg 46 is pulled and stretched by the interacting flanks 53 of the adjacent teeth 52 of the gears 47 and 48.

For example, from Fig. Refer 8, as the teeth 52e and 52f draw and stretch to lengthen it considerably, the lower! Part of Bippe 46B while the head 55 of the teeth 52a of the top Bippe 46B in a koplane relationship returns to the point of contact of the leg 46B. If the teeth 52 of the gears 47 and 48 are in full singular engagement, the flanks 53 of the adjacent teeth 52 work together to pull, stretch and lengthen the uppermost part of each rib 46 and to bend it substantially so that the rib thus obtained 46 is given an approximately S-shaped cross-section. Compare

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on this I ¹ Ig. 8, in which the teeth 52g and 52h of the gear 48 and «," 47 begin to pull and stretch the upper part of the rib 46E The teeth 52 of the gears 47 and 48 work together to cut and subdivide the web 42 into individual ribs 46, while at the same time the ribs 46 are pressed and stretched to substantially increase their surface area, so that they are an effective secondary heat exchanger. Surface result, as can be seen _{on the heat exchanger produced in Mg 0 9}

As stated above, the device can only contain a pair of gears 47 and 48, which are on one operate single web of the tubular part 41, or four gears can be provided (see. Pig. 4) to simultaneously also edit the opposite web 42 to form heat exchange ribs. In both cases form the gears of the device from the ribs 46 (see. Jig. 9-11) that these with the outer surface 43 of the Pipe part 41 remain connected by a reinforced attachment part 61 and 62. Not just to increase the thickness of the To reinforce the approach of the individual ribs, but also to increase their surface contact with the pipe part, to promote heat dissipation to a greater extent. The attachment parts 61 and 62 of the individual ribs are through the Arched formation of the teeth on the front side of the gearwheel (as can be seen from FIG. 7). Further Here, the rib 46 has an inner part 6.3 (cf. FIGS. 10 and 11), which runs in an arc shape, not only for the sake of correlation to create between rib and hollow body, also to create a surface contact between the individual ribs and to ensure the outer circumference of the pipe part "

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It was found that the surface area of each rib made by the method of the present invention was 46 µm at least # 20, but also up to over $ 100, of the original Surface area could be enlarged *

In the manner described above, not only does the surface area become of the ribs 46 enlarged, but these enlarged ribs remain with the outer circumference 43 of the pipe part connected, whereby the closest contact between the ribs 46 and the pipe part 41 is made to the To ensure the heat dissipation required for heat exchangers · Is a blank 40 of the desired length to form a Shaped heat exchanger 60, this can also be bent or spiral-shaped, but it can also be in be left in its stretched shape for storage or shipping purposes or for any other specific purpose or experience another appropriate design. Thus it can be done according to the method according to the invention easily adapt formed heat exchangers to most requirements

The heat exchanger 60 described above can, for example, also be bent in the shape of a staircase in the manner shown in Pig. 12-15. Thus, the heat exchanger 64 is suitable as an evaporator or condenser. As shown in FIG it shows a substantially rectangular configuration. the parallel strands of the exchanger are connected to each other by half arcs · About uslässe the bond and ^a 67 and 68, the heat medium is supplied "

On request, the ^ ribs 46 on part 41 in the area of Half arches 65 and at the inlet and outlet 67, 68 (see. Fig. 12) to be removed

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To the rectilinear part 41 of the exchanger one To provide a rigid construction, two frame strips 71 opposite one another are to be found on the half-arches 65 Each frame strip consists of a lower part 69 and an upper part 71, which has a plurality of openings 72 has, into which the semi-arches of the exchanger are inserted. The part 65 of the upper part of the strip that covers the openings is pressed down after inserting the exchanger, effectively around the semi-arches without special fastening measures to hold on, the frame strips 69 are provided with miijösen 73, to be able to be attached to the installation site.

A further embodiment of a heat exchanger is shown in the Pig. "9 This embodiment can easily be used for the production of evaporators and Eondensom or the like, how so? in FIGS. 16 and 17 · Here, the tubular portion 41 serpentinenarüg ge? / rounds to a substantially rectangular shape having semicircles 75 to devoted here also are ^ ± n- and outlets 78 and 79 provided on the respective opposite ends . The serpentine-like wound Eohrteil 41 is carried here by two opposite frame parts 80, so that a rigid connection is achieved. Each frame strip 80 may be substantially s, ^ consist of a U-shaped part 81, such as from S ¹ Ig. 17, which is attached to the outside of the half-arches. -The bar is fastened to the semi-arch 75 by means of the part 83, the fastening part 83 being provided with a thread. In this way it is achieved that the ribs 46 on the pipe part 41 in the area of the semi-arches do not have to be removed.

This type of heat exchanger shows that it can also be used for other purposes «

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So is in Pig. 25 shows a household refrigerator, which consists of two chambers 85 and 86, the latter being the actual freezer compartment The evaporator 87 with the suitable fan 98 is arranged between the two chambers * The heat exchanger types according to Fig. 12 and Pig. 16 suitable

In Pig. 18 the hip tube is wound in a spiral shape, the individual turns getting smaller and smaller diameters in their course. This type of heat exchanger is arranged in an air duct 89 through which air is forced. The air flow can through the channel 89 from the left to right or vice versa, so that it first narrowed one widened end of the spiral or the other Reached the end of the spiral.

Instead of a circulating coolant, the can be used in a spiral bent exchanger tube a heating or resistance wire can be used, such as from Pig. 20 to be seen, the from the inner wall of the pipe part 41 by means of magnesium oxide 91 or the like. is stripped.

That in Pig. 20 illustrated electrical heat exchanger element can according to Pig. 21 used in living rooms 92 as circulation heating

will. The element is housed in a casing 93 (see Pig * 22), and is received and supported within the casing by suitable support clamps 94. However, a heating medium can also be sent through the finned tube to heat the room.

The tube part 41 can, however, also be spirally wound in itself in order to provide a substantially flat heat exchanger for the Construction of condensers, evaporators, etc. this porm also for space heating, ventilation systems, drying devices etc. can be used.

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By means of a ribbed tube 41, which is shown in FIGS Suitable fan 96 air and driven through the tubular body 41 a heat transfer medium or a heating resistor intended.

If necessary, the finned tube 41 in its coiled jona. form a cylinder (cf. Pig · 26 and 2?) and be inserted into a suitable housing 97, through which air is sent by means of a fan 98 «

The finned tube 41 can also be coupled to an accumulator 99 (according to FIG. 28) and wound around the latter to create a. To achieve heat exchange between this and the pipe body «

In the manner shown in Figures 29 and 30, the finned tube can also be used in a ventilation system The finned tube 41 is wound around an evaporator 100 and a condenser 101, the outlet of the condenser 101 is connected to the inlet of the evaporator 100, while the outlet of the evaporator 100 is connected to a compressor with respective fans 104 and 105 being used to blow air over the evaporator 100 and the condenser to press

As can be seen, the finned tube can be used in a variety of shapes accommodated to the type of heat exchanger adapted to the required use · Accordingly, the finned tube suitable · to realize the design desired in each case the required $ deformation of the finned tube can, quickly and with simple Means succeeded, so that in comparison with the known heat exchangers the production costs are low «

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Sas Hippenrohr is also used to form a frost-proof Evaporator suitable for cooling devices ο «the like«

That in the pig. 31-33 shown hip tube 41 is formed into an evaporator and with a heating element coupled, through the periodic current to defrost the tube flows.

In particular, the heating element 106 can be provided with suitable Clamps 107 are connected to the finned tube 41. If necessary, the Hippenrohr can also be directed outwards Splash 108 be equipped, which point to the hollow ring 40 and are extruded with this · The heating element may be picked up by puddles 108, compressing the puddles about element 106, or it snaps between them. Optionally, the heating element can also be accommodated within the finned tube (cf. Pig. 33).

While, as described above, by means of the device the ribs are pressed and stretched in such a way that the planks 53 of the teeth 52 of the gears 47 and 48 cooperate, has also been found that the flat planks of the teeth can work together in a similar manner to get out to form ribs 46 on the web of the blank by cutting, pressing and spreading "

This is done in the following way. The gears shown in Pig · 3 and 4 are essentially the same as those of the Pig · 8 · However, the intermeshing teeth 52 cut the longitudinal web of the blank 40 in the upward direction and push and stretch it. The ribs are therefore between the flat ones Planks 54 formed of the teeth 52 · Ss it was now found that due to the increased loading of the gears 47148

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increased engagement occurs, thereby reducing the surface area of all ribs formed compared to that of the original continues to be enlarged «A further enlargement of the rib surface is duroh the This drawing and stretching process kept the radius small made possible at the turning point of the rib

The one with its longitudinal web from one piece in the extrusion process The blank produced can of course also be replaced by one with etched webs be ©

Patent claims:

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Claims (1)

H51261 M ν Claims ι would be * exchangers from tubular hollow bodies rait several, but at least one l'ingseteg sitting on its outer side, characterized in that the sown surface or from the ri cut; * n is at least 20 % more effective than that presented to the cut; stegfiwehe ^r . 2, frärmeauetauacher nnoh claim i, characterized in that that the hips cut from the stec are out of the plan " level of the ategs are turned. }, teärraexauscher nacr *. «nspruon. ±, dsduroü characterized that the cross-section of the hip in its junction ve «ttiihrenk body where _i; ; Is designed to decrease. 4 · heat exchanger n & ch - nsprucn i, characterized » that the: ucrccimitt of the u ir. pe η essentially in all Is the same thickness. 5. toMraeo exchanger according to claim 1, characterized in that that the plane parallel to the hollow body * ch «e crankedi Hipper * a mountain right position to this i-bene stretch. 6 Sauce exchange according to claim 1, characterized by that each of the butts is connected to the hollow body by an approach that exists in this way. 7 * heat exchangers according to claim 1, daduroh characterized, that the Hohrkdrper over half-arches to parallel strands bent let, for stiffening in two frame strips inserted slxjd. ^ - 90 9813/0127 14 0 IZO I. 8. Väraeaustauscher according to claim 1 _t thereby gekenaKelkom ₉ doS Oi * Rahaenlelsten (71) unite with a number of openings and ₉ la which the semi-arches (6 $) become elagesohobea »whereupon the part that covers the opening is pressed down * 9 * heat exchanger according to claim 1 _f dadureh ArQ the semi-arcs t <5 5) r $ n Hippen (ΑΪ) ontlaetat Process for the division of a "β wärmeauetsiueohera" ue sinea with aindeetens a longitudinally arranged hollow body n "t * i Aatpnteh I ₉ dadureh g®üceanisiclmet _f that 4er IAageetei by overrollea of with cutting""drawing and Streokprefilea & gahnErUetea au Tilting seaehaittea is »die äaaohliefiead gedrflekt« ad stretched «erdea« 11 · Method according to, Aaepmoh 10 _e thereby gekenaseiohaet "that the crooked ribs are perpendicular to the longitudinal axis of the plank" and are peeled off parallel to one another " 12 · Procedure aaeh Aaepruoh 1O ₉ dadureh ^ ekenneeichndt » elaselaen Hippea eo eui (S «ns Jjingaeteg geoohnittea werdea» that tin Rippenaaaati will be left at the Hohrstüok " 13. The method according to claim 1O ₉ dadureh gekenaseiohnet ₉ ä & a the tilting clay the Safeaprefilea of the Walsea in such a way eeetreokt are ₉ dsJ whose surface among other things at least 20 ^ is enlarged. 14. Eiariohtuag eur implementation of the method according to claim 1O ₉ identified by the arrangement of gear drives ₉ in which the i & ngosteg of the Hchlkurpers pressed ^ su a number of tone tilting is divided and stretched 15 "Device according to claim U" daduroh identified ₉ that the S-horn of the shoot cm of its front facing the hollow body bswe in the Abrellehene arched-like rounded bind " 16 · Device according to claim 14 »in that the Engaging flanges, rounded teeth * ln & V Ö098 1 3/0 1 27 _-.