LU82197A1 - FLAT TUBE HEAT EXCHANGER - Google Patents

Description

D. 51,039

δ ~~ ίΊ »I ζΓ" ^ GRAND-DUCHÉ DE LUXEMBOURG

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you ... 25. février .... 198.0 iMonsieur le Ministre: _. . , RvSSti de l’Economie Nationale et des Classes Moyennes

Titre delivre: ........................................ iWm

Service de la Propriété Industrielle LUXEMBOURG

Demande de Breyet d'invention • I. Requête ..... # Qns.ieuE ... Die ^ Im Schönenbühl ....... à ..... 9ρ5.ο ... εΤΕΐΜ56ΓΜ.? Μ. ·: (Ϊ́) ...... ZEUL ·., ...... Suisse., ...... ropr.ëserité .... par .... Mons.ieur ..... Jaqques ..... de..Muys.er., ...............................

...... agissant. ..en .... gualité ... de ... mandata .................................. .................................................. ......................................... (2) dépose ..... ... ce ..... .y.ln.g.tr. & lnq ..... f.ëvrl.er ..... 19.QQ .... g.uafcr.ey.ln.gt ....................................... (3) à ....... ..1.5 ............... heures, au Ministère de l'Économie Nationale et des Classes Moyennes, à Luxembourg: 1. la présente requête pour l'obtention d'un brevet d ' invention concernant: ...... "Flat tube heat exchanger" .................................... .................................................. .................................................. ....................... (4) déclare, en assumant la responsabilité de cette déclaration, que l '(es) ïnventeur (s) est (sont) : ...... le ..... àépQ.sanfc ................................. .................................................. .................................................. .................................................. ............... ........................... (5) 2. la délégation de pouvoir, datée de ..... STEXliEGG ..... .......................... le ..1..9 ..... fδνΓ.1θΓ .... 19.8θ .., 3. la description en langue .......... everyone ................................. de l'invention en deux exemplaires; 4 .............. 3 ................ planches de dessin, en deux exemplaires; 5th la quittance des taxes versées au Bureau de l'Enregistrement à Luxembourg, le 25 février 19 8o ............................. .................................................. .................................................. .................................................. ..........................

revendique pour la susdite demande de brevet la priorité d'une (des) demande (s) de (6) ........................ brevet .. .......................................... déposée (s) en (7) .......... Allemagne Fédérale ...................................... .....

le ....... 2o décembre 1979 .......... (No ........ P 29 51 352.8) .............. .................................................. .................................... (8) au nom de déposant ....... .................................................. .............................. (9) élit domicile pour lui (elle) et, si désigné, pour son mandataire, à Luxembourg ........................................

35, bld. Royal ................................................. .................................................. .................................................. .................................................. ....... dO). sollicite la délivrance d'un brevet d'invention pour l'objet décrit et représenté dans les annexes susmentionnées, - avec ajournement de cette délivrance à ........... LL --------- ------------------ mois.

Ve ^ mandataire \ .......... | ........ χ ...

II. Procès-verbal de Dépôt

La susdite demande de brevet d'invention a été déposée au Ministère de l'Économie Nationale et des Classes Moyennes, Service de la Propriété Industrielle à Luxembourg, en date du: 25 février 1980 .- · '........ Pr. le Ministre à ......... 15 ......... heures S. de l’Economie Nationale et des Classes Moyennes,

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> / / r Ç / Ψ l A 68007_ \% ...... - j [_ / - / / -) _ D. 51.039

DEMANDING PRIORITY

the patent / iäjijri. - Registration

i:, IN: THE FEDERAL REPUBLIC OF GERMANY

From: 2o. DECEMBER 1979

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i PATENT APPLICATION

| in 1 Luxembourg i, 1!

Applicant: Mr. Dieter STEEB

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Re: "Flat tube heat exchanger".

i / / ΙΛ '«* * m i December 10, 1979 Reg.-Nr. 126 040 7508bts

Dieter STEEB, CH 9050 Steinegg-Appenzell (Switzerland)

Flat tube heat exchanger j i | The invention relates to a heat exchanger that at least! least has a flat tube package, which is made for the

Provided flow of a first medium / flat tubes of equal length, which are assembled with overlapping broad sides to form gaps for the flow of a second medium and whose adjacent ends are connected to an end wall which closes an opening of a collecting box to the outside and through which the flat tubes open into a common collecting space of the collecting tank, in particular an oil cooler, in which the first medium running through the flat tubes is oil and the second medium is air f.

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A heat exchanger of this type is known from DE-AS 21 13 583. The use of flat tubes in heat exchangers not only has the advantage that a relatively good efficiency of the heat exchange is achieved 5, but that heat exchangers of this type also have manufacturing advantages. A flat tube package can thus be formed from rectangular plates, which are alternately connected to strips at different, opposite edges, e.g. are soldered, which 10 close off the spaces between the plates to the outside, thus creating flow spaces that run alternately in directions rotated through 90 °. As is known, such flat tube packages can be produced very easily by stacking solder-plated, rectangular 15 plates and corresponding strips one above the other to form a package and then soldering them to one another in an oven.

Flat tube packages, in which the flat tubes are formed from welded or from flat pressed, seamless round tubes 20, have e.g. special advantages if corrosion-resistant heat exchangers have to be formed.

In such a case e.g. the flat tubes are made of stainless steel.

In all known heat exchangers in which flat tube bundles 25 made of welded seamless flat tubes are used, the flow spaces through the flat tubes for the first medium extend in a straight direction. In practice, however, conditions can arise in which the first medium has to be guided on a curved path. Since these flat tubes cannot be bent around an axis perpendicular to their flattening, in such cases only / i t! - 3 - * »

Flat tubes can be used if they are made from curved plates with curved strips. However, such arcuate plates lead to a * great loss of material.

5 The invention is based on the object of creating a heat exchanger with flat tube packages in which a curved flow path for the first medium is also possible with straight flat tubes.

This object is achieved in a heat exchanger of the type mentioned at the outset according to the invention in that the header box for the connection with one end wall each of a flat tube package has two openings, that the surfaces defined by these openings are at an angle to one another, so that the Collection box forms a 15 angle box, which connects two flat tube packages so that the flow directions of the flat tubes of the two flat tube packages run to each other at the named angle. It is thereby achieved that two flat 20 'tube bundles standing at an angle to one another can be connected to one another by means of an angle box, and the flow of the first medium can thus be deflected despite the straight flat tubes.

The invention can be developed in a particularly advantageous manner in that the angle between the two 25 opening surfaces of the angle box is 360 ° and that n identical flat tube packages are connected to one another by n angle boxes of this type to form an n-side ring heat exchanger. The invention thus opens up the surprising possibility of producing a ring cooler from flat tube packages which consist of 30 straight flat tubes. A flat tube ring cooler is known from DE-OS 22 00 826. However, this consists of plates cut out in a ring shape H, which are shaped by ring-shaped i

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Strips to form the flat tubes for the first medium and are connected to one another by annularly bent sheet metal lamellas to form the radially directed flow spaces for the second medium. When manufacturing the 5 annular plates and fins for this known ring heat exchanger, a lot of material is lost when cutting the annular plates. In contrast, it is achieved by the invention that the flat tubes for a ring cooler can be produced from rectangular plates 10 which are connected to one another by straight strips. The panels and strips can be cut practically without loss.

Another advantage of this embodiment according to the invention is that for a ring cooler, flat tube bundles can also be formed from welded or from flat-pressed, seamless round tubes, which can be of great advantage in particular in special applications if the circular cooler is made of a corrosion-resistant material, e.g. made of stainless steel.

20. To introduce and discharge the first medium into the circumferential flat tubes of a round heat exchanger according to the invention, two angle boxes can be provided with an inlet or an outlet connection for the first medium, which are preferably arranged at diametrically opposite positions at-25 .

In a preferred embodiment, a collection space is assigned to each of the two openings in at least one angled box, the two collection spaces being separated from one another by an inner wall and each provided with a connecting piece for the first medium. This ensures that a ring heat exchanger according to the invention can be designed so that the first medium in one h i.

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Collection space of the angle box is introduced and then runs back through all flat tubes of the annular heat exchanger to the other collection space of the same angle box, where it is then discharged through the drain pipe.

5 But you can also use two or more such divided angle boxes, so that then two or more flow spaces for two or more different first media are obtained. One can thereby with one and the same ring heat exchanger and for example with one and the same second medium, e.g. Air, several different first media cool.

I Another advantage of the invention is that only S by different design of the angle boxes, namely by choosing different fractions of 360 ° for

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I 15 the angle between the two opening surfaces, from the same flat tube bundles ring heat exchangers with different versatility and thus with different sizes of diameters can be manufactured, which also considerably simplifies the production of different sized coolers.

The invention is explained in detail in the following description of exemplary embodiments shown in the drawing.

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Show it:

Figure 1 is a perspective view of a first embodiment of a heat exchanger, which consists only of two flat 5 tube bundles of flattened, seamless tubes.

FIG. 2 shows a side view of a flat tube package of the heat exchanger according to FIG. 1;

2a shows a perspective view of the angle box used in the embodiment of FIGS. 1 and 2;

3 shows a perspective view of a second embodiment of a heat exchanger consisting of two flat tube packages;

Fig. 4 is a partially sectioned and broken Chen plan view of the heat exchanger of Fig. 3;

Fig. 5 is a perspective view showing the 20 structure of a flat tube package from the exemplary embodiment of Figures 3 and 4 in a disassembled state.

Fig. 6 shows a representation corresponding to Fig. 2a of an angular box with two collecting spaces;

7 to 10 top views of various ring heat exchangers constructed according to the invention.

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The heat exchanger shown in Fig. 1 consists of two flat tube packages, designated as a whole by 11, which are connected to one another by an angle box, designated as a whole by 12. The angle box 12, which is shown in perspective in FIG. 2a alone, has two openings 13 and 14, each of which defines a flat opening area. These opening surfaces are at an angle 15 to one another (FIGS. 1 and 4) and are connected to one another by the interior of the angle box.

10 The flat tube package 11 is in the embodiment

1 and 2 of the same length, straight flat tubes 21, which are formed by flat pressing from seamless round tubes and e.g. may be made of stainless steel or another non-corrosive metal in inserts at risk of corrosion. The ends of the equally long flat tubes 21 are connected to the edges of openings 22 in a plate 23, e.g. welded so that

The plates 23 located at the two ends of the flat tube package 11 form end walls of the flat tube package. A 20 of each of the two openings 13 and 14 of the angle box 12 is closed with such an end wall of a flat tube package 11 formed by a plate 23, which e.g. can be achieved in that the plate 23 is welded 25 to the edges of the respective opening 13 or 14. The remaining free end wall can then be connected to another angle box or another collecting box. The connection of the two flat tube packages through the angle box 12 creates a curved flow path for the first medium despite the straight flow spaces of the flat tubes.

The embodiment shown in FIGS. 1 and 2 can also form part of an annular heat exchanger, as described in detail below and shown in FIGS. 7 to 10. 1 and 2 - 8 - can therefore also be regarded as broken representations of a part of such a ring heat exchanger. The particular advantage of such a ring heat exchanger constructed from flat tube bundles 11 is that these consist of packages of flat-pressed, seamless tubes made of a corrosion-resistant metal, e.g. made of stainless steel or the like.

The embodiment of a heat exchanger shown in FIGS. 3 to 5 corresponds to the heat exchanger according to FIG. 10 only with the difference that here each flat tube packet 111 is formed from congruent, rectangular plates 123, which are arranged one above the other and by strips 124 and 125 held apart and connected to these strips, e.g. are soldered.

15 The strips 124 are arranged along the longitudinal edges of the rectangular plates 123, so that a flat tube extending in the longitudinal direction of the rectangular plates 123 is formed by two adjacent plates 123 and the longitudinal strips 124, which 20 function as a flat tube 21 of the 1 and for the flow of a first medium, for example of oil in an oil cooler. The space formed by the distance between two flat tubes constructed in this way is laterally delimited by two bars 125 which extend along the opposite short edges of the plates 123 and are connected there to the adjacent plates 123. Flow strips, whose flow direction is perpendicular to the flow direction of the flat tubes and which are used for the flow of a second medium, e.g. Air in an oil cooler. To the heat transfer between the second medium through this

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Gaps delimiting plates 123 and by the; To improve flat tubes flowing the first medium, 'are arranged in these along the strips 125 extending through flow spaces sheet metal plates 126, which can be soldered to the adjacent plates 123. Such a flat tube package can be produced very easily and practically without loss of cut-out, by placing the plates 123 and the strips 124 and 125, as illustrated in FIG. 5, on top of one another. If the plates 123 10 and the strips 124 and 125 are solder-plated, then a package assembled in this way need only be introduced in a known manner into a soldering oven or a soldering bath, so that these parts are then soldered tightly together in one operation.

| With a flat tube package soldered together in this way | The end walls are formed by the short edges of the plates 123, the ends of the strips 124 and the outer broad sides of the strips 125. These end walls can now easily be connected to the edges of the openings 13 of angle boxes 112, e.g. be soldered together.

20 FIGS. 7 to 10 show various ring heat exchangers constructed from the flat tube packages 11 or 111.

With these ring heat exchangers, in addition to an angle box 12, an angle box 112 (FIG. 6) or 212 (FIG. 8) is also required. In the angular box 112, the interior is divided by 25 an inner wall 16 into two collecting spaces 17 and 18, to which the openings 13 and 14 are assigned. Each of these collection rooms 17 and 18 is with a connecting piece 19! connected. The angle box 212, like the angle box 12,! a continuous interior and is additionally equipped with a | 30 connecting pieces 19 ’provided. Depending on the size of the winches 15, which form the two opening surfaces of the angle boxes 12, 112, 212, the number of sides of the versatile ring heat exchanger can be varied as desired.

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In the exemplary embodiments according to FIGS. 7 and 8, the angle denoted by 15 is 90 °. This creates a four-sided ring heat exchanger. In the embodiment of FIG. 7, two Win-5 kelkästen 112 are provided, each with two collection rooms and with two connecting pieces 19 each. These angle boxes 112 are arranged at opposite corners of the ring cooler. The two other angle boxes 12 each enclose a single continuous collecting space. How - 10 - h, ...... '.ftl' - 10 - that in Fig. 7 by the arrows 127 and 128 as well as by the dotted flow lines 129 and 130, two flow spaces are created by this design for the first medium flowing through the flat tubes. Such a ring heat exchanger can be used for a stream of a first medium divided into two streams or for two different first media.

The ring heat exchanger shown in FIG. 8 differs from the ring heat exchanger 10 shown in FIG. 7 only in that here the two angle boxes 212 provided with connecting pieces 19 'each have only a single flow space and thus only one connecting piece 19'. This creates an annular heat exchanger which can only be used for a single medium flowing through the flat tubes I 15, this medium being divided into two branches in accordance with the flow rate also shown in FIG. 8 by j arrows and dotted lines, which are then brought together again into a stream 20 in the connecting piece 19 '.

In the embodiment shown in FIG. 9, a ring heat exchanger is shown in which the opening surfaces of the angle boxes 12 * and 112 'form an angle 15 of 360 ° = 120 °. With these angular boxes 12 'and 112' 25, a three-sided ring heat exchanger can now be set up. In this embodiment, only one Winkelka-Ü stenll2 'is divided into two hem spaces and provided with two connection sockets 19. The two other angle boxes 12 'have only a single collecting space as a flow space. In this round heat exchanger, the first medium flows through the one connecting piece 19 into the heat exchanger, Jen runs through the entire heat exchanger through the I flat tubes and then flows out of the second connecting piece I -.

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The ring heat exchanger shown in FIG. 10 has two angular boxes 12 "and three angular boxes 112", in which the angle 15 between the opening surfaces is 360 ° = 72 ° 5. A 5-sided heat exchanger can be set up with these angle boxes. The three angle boxes 112 ″ used here are each divided into two collecting spaces and each provided with two connecting pieces 19. This ring heat exchanger thus has three flow spaces 131, 132 and 133. It can therefore be used for three 10 different first media that the different flow spaces in all of the annular heat exchangers shown can be of different lengths, depending on where the angle boxes 112, 112 'or 112 "are arranged.

15 This has the advantage that when using different first media for this different heat exchange conditions can be created.

If the ring heat exchangers according to the invention are constructed in the preferred embodiment of the invention from the flat 20 tube bundles according to FIGS. 3 and 5, then there is the first and surprising advantage that the ring heat exchanger can be constructed from flat tube bundles 111, which practically without loss of material during Cutting the plates 123 and the strips 124 and 125 25 can be produced. A further advantage is that these flat tube bundles 111, but also the flat tube bundles 11, according to the exemplary embodiment according to FIGS. 1 and 2, can be used for ring heat exchangers of different sizes, depending on what angle boxes 12, 12 ', 12 ", 112, 30 212, 112 "can be used.

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Claims (7)

1. Heat exchanger, which has at least one flat tube package, which consists of flat tubes of the same length provided for the throughflow of a first medium J, the overlapping broad sides with i forming intermediate spaces 5 men are built together for the flow of a second medium and their mutually adjacent ends are connected to an end wall which closes an opening of a collecting tank to the outside and through which the flat tubes open into a common collecting chamber of the collecting box, thereby characterized in that the collecting box for the j connection with one end wall each of a flat tube package (11, 111) has two openings (13, 14) that the through | these openings define surfaces at an angle (15)! stand to each other, so that the collecting box forms an angular box (12, 12 *, 12 ", 112, 112 ', 112", 212), which connects two flat tube packages so that the flow directions of the flat tubes of the two flat tube packages in the named -; th angle to each other. 2. Heat exchanger according to claim 1, characterized in that the angle (15) between the two opening surfaces of the angle box (12, 12 ', 12 ", 112, 112 *, 112", 212) - is 360 ° and that n the same flat tube packages n are connected to each other by n angle boxes of this type to form an n-sided ring heat exchanger. ! 25th 3. Heat exchanger according to claim 1 or 2, thereby ge | indicates that at least one angle box (212) with | a connection piece (lîJ) for the first medium is l. A / Ls \ (^ «- 13 - • t 4. Heat exchanger according to one of claims 1 to 3, characterized in that at least in an angle box (112.112% 112 ") is assigned to each of the two openings (13, 14), a collecting space (17, 18) and that the two the collecting spaces are separated from one another by an inner wall (16) and are each provided with a connecting piece (19) for the first medium. 5. Heat exchanger according to claim 4, characterized in that at least two in two saramel spaces (17, 18) 10 divided angle boxes (112) are provided which separate at least two flow spaces for one or at least two different first media from each other. 6. Heat exchanger according to one of claims 1 to 5, characterized in that the flat tubes at least one- 15 nes flat tube package (111) are formed from rectangular plates (123) which alternately on different, opposite edges with strips (124, 125) connected, preferably soldered. 7. Heat exchanger according to one of claims 1 to 6, 2o characterized in that the flat tubes (21) at least one flat tube package (11) are formed from welded or from flat-pressed, seamless round tubes, the ends of which with the edges of openings (22) of a plate (23) are connected, the ^ wall of the flat tube. 25 ketes forms. VÀ. A .. vXL