DE1751146A1 - Stacking arrangement for heat exchangers formed from plates provided with indentations - Google Patents

Description

FATKWT HOiLZEB DIPIi. IKO. B. SKtJIIQ 89 AUG η. With

N. 110

Augsburg, April 9, 1968

National Research Development Corporation, Kingsgate House 66-74 Victoria Street, London SW 1, England

Stack arrangement for heat exchangers formed from plates provided with impressions

The invention relates to heat exchangers and relates to heat exchangers of the type in which the flow channels for the heat exchanging fluids are formed by the surfaces of a stacked arrangement of plates which are stacked one behind the other. ^;

In British patent specification 901 914 was prepared

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issued a heat exchanger design that contains a plurality of individual plates that are stacked on top of one another, The individual panels consist of thin panels, in which patterns of alternating four-sided pyramid are punched in front of cracks and pyramid impressions, the patterns mentioned being selected so that each Baseline of a pyramid protrusion with the baseline of an adjacent indentation coincides and that each baseline of a pyramid indentation coincides with the baseline ^ of an adjacent pyramid protrusion coincides.

The apexes of the projections and the indentations then lie on straight lines that are in two essentially one another perpendicular directions. Further are means provided that the plates are stacked on top of one another in such a way that the apices or tips of corresponding projections and indentations on adjacent plates substantially touch each other, so that the cross-sectional area for the Flow between the profiled surfaces of adjacent ones Plates, based on the two directions mentioned above, in which the tips of the projections and indentations are aligned, is constant. By closing the flow channels between suitable parts of the edges of the individual panels can relevant heat exchangers as co-current heat exchangers, '' as a countercurrent heat exchanger or as a heat exchanger with

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crossed flow of heat exchanging fluids be formed,

They flow channels for the heat exchanging fluids essentially have in the heat exchanger according to the known construction just briefly described identical properties and accordingly it is not always possible to achieve the desired heat output in all applications. to achieve exchange effect.

The invention is now intended to solve the problem a stack assembly formed from indented plates for heat exchangers, in which the flow channels for the heat exchanging fluids Executed with the desired effective cross-section and with the desired flow properties can be provided.

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This object is achieved according to the invention in that several pairs of plates stacked on top of each other provided βiod, their single platan with a regular pattern of protrusions provided and so arranged with respect to one another are that the gate jumps are each a plate in the formed within the protrusions of the other plate.

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The projections in each plate can be

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th cavities protrude, but do not fill them,

so that between the plates there is a pair of plates \

a first flow channel results and that the plate pairs ί

for their part are each stacked so that they \

each form a second flow channel. f

moderate pattern of indentations in this plate from one another}

which can be separated and / or defined by this regular pattern of impressions. As already said, educates the space between the tips of the projections of the plates each of a pair of plates a flow channel for a first heat exchanging fluid, while a flow channel for a second heat exchanging fluid arises in the space between adjacent pairs of plates.

In a thus constructed Stape! Arrangement for heat exchangers will be apparent to the flow channels, which are assigned to the individual heat exchanging fluids, each having different properties and by appropriate choice of the dimensions of the projections on the plates of each plate pair, the flow channels for _ each heat exchanging fluid with properties be equipped, which meet the requirements of the relevant heat

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exchangers are adapted to the requirements.

The projections can have any shape and, for example, square or triangular pyramids Be formed floor plan.

According to one embodiment of the invention is at least

the one plate of a pair of plates ^ it regularly between the. Provided impressions arranged projections. The M base line of each projection can coincide with the base line of an indentation. The press-in recesses can have the same shape as the projections. On the other hand, however, profiling is also possible in which the base line of a projection forms the apex of an indentation. The protrusions can be in the form of saddles between the indentations.

. A heat exchanger according to the invention, in which all plates are arranged at regular intervals before " Cracks and indentations in iorm quadrilateral pyranids have, the baseline of a projection with the Baseline coincides with an indentation, see taking into account the idea according to the invention thereby a · »for & rneaustauscher according to the British» patent specification 901 come out think that the plates of the stack

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in their respective planes by a distance are offset, which corresponds to the distance between adjacent vertices of the projections.

The projections and indentations of the profile preferably protrude from one plate of a pair of plates particular median plane of the plate in question

^ to the protrusions and indentations on the other Plate of the couple gone in varying degrees. In the case of pyramidal protrusions and indentations these on the plates each of a pair of plates accordingly different vertex angles. The projections and impressions on a plate of a pair of plsts can here be truncated. In the following, a plate is expediently with a relatively large The apex angles of the projections and indentations are referred to as a flat-profiled plate, while a plate with

P holds a smaller vertex angle than a deeply profiled one Plate is called.

In such Ausführungsforraen according to the invention, at which the plates of a pair of plates have essentially the same shape, kana the cross-sectional area of the flow channels for each heat exchanging fluid can be designed to be in substantially all cross-sectional planes perpendicular to the plates

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is constant. It should be noted that in the case of the constant Cross-sectional area of a flow channel on the losses Reason for compression and expansion of the fluid, which occurs during operation through the channel in question conducted ", must be kept at a minimum value.

According to one embodiment of a heat exchanger According to the invention, flat-profiled panels are alternately stacked with deep-profiled panels, so that a flow channel for a heat-exchanging fluid results between the plate pairs. At this Arrangement separates each plate a flow channel for that one fluid each from a flow channel for the other fluid, so that the heat exchange through all plate parts during operation takes place which with heat exchanging fluids come into contact.

In another embodiment of the invention placed against each deep-profiled plate a pair of flat-profiled plates, which the latter are arranged so that each one One plate protrudes from a press-fit of the other Plate of this pair is opposite, so that a flow channel for the one fluid results, while another flow channel for another fluid outside of the out of the two flat profiled plates formed plate pair

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arises. In this arrangement, the deeply profiled plates separate adjacent pairs of flat-profiled plates and thereby form flow channels for the said other fluid between respective adjacent pairs of the flat-profiled plates. The heat exchange takes place only through the flat profiled plates, while the deeply profiled plates represent so-called secondary heat exchanger surfaces. The flow channels are fe in this embodiment as well as in the arrangement described above essentially with a uniform cross section; educated. \

According to yet another embodiment of the invention

Of the plates in a pair of plates, only one plate has a pattern of regularly spaced projections, and adjacent projections can have common or adjacent baselines . In a stack arrangement made up of such plates, each plate pair contains a plate which only has projections

transmits, while the other plate having a pattern at regular t

moderately spaced projections and impressions is provided. This stacking arrangement is somewhat cheaper than the arrangements according to the invention described briefly above, but flow channels are obtained whose cross-sections change from cross-section to cross-section, wae

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during operation to losses due to the flow channels guided fluid can lead.

In the following, the invention is illustrated by the description of a number of exemplary embodiments with reference to FIG the accompanying drawings explained in more detail. In the drawings show:

figure Λ a perspective view of a part «

a plate for the construction of a noise

Tausohers according to the invention,

Figure 2 shows a cross section through the plate along • the section line II indicated in Figure 1

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Figure 3 is a sectional view of part of a

Stacking arrangement for a färaeauetau · «*» · » according to the invention, the sectional planes placed through the stacking arrangement along the line HI-III indicated in FIG

Figure 4 shows a further cross-sectional representation of a

Part of the stacked arrangement of Figure 3, "3 · - but according to a cutting plane · fi * 4h the line II-II voa figure 1 _t

Figure 5

a cross-sectional view similar to Figure 3 to explain another Form of a stack arrangement according to the invention,

Figure 6

a cross section through the stack arrangement according to Figure 5 with the selection of the cutting plane according to Figure 4,

Figure 7

a perspective view of part of another plate for a stacking arrangement according to the invention,

Figure 8

a cross section through the plate according to FIG. 7 along the section line VIII-VIII _{1 indicated in this drawing}

Figure 9

a perspective, exploded view of a further embodiment of a stack arrangement for a heat exchanger according to the invention and

the figures 10,
11th and 12th

Cross-sectional representations corresponding to different cutting planes indicated in FIG.

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Reference is first made to Figure 1 of the drawings. The plate 1 is in the form of a thin sheet made of a material which has suitable heat conduction properties and has a corrosion resistance to fluids with which the plate concerned comes into contact during operation. For applications at low Temperatures and in cases where the heat exchanging fluids are chemically and physically are relatively little active, the plate 1 can be made of sheet metal or ceramic material. For heavy use, especially at elevated temperatures en, it may be useful to use plates made of ceramic material, which is resistant to temperature shocks and, for example, from the Corning company Glassworks Corporation of the United States of America or from Minnesota Mining and Manufacturing Corporation can be obtained. On the plate 1 is a regular pattern of spaced projections in FIG Form of four-sided, substantially regular pyramids provided, which have peaks 2 and with regular Alternate the spaced-apart indentations, which also take the form of a substantially more regular four-sided Have pyramids that have 3 tips. The tips 2 are marked in Figure 1 with a circle to to be able to find them better. The protrusions and press-in

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Sings are arranged with respect to one another in such a way that each base side, for example the base side 4 of the projections, at the same time also forms the base side of an indentation and vice versa. The tips 2 and 3 of the projections or indentations of the plate 1 are "in each case on straight lines, for example the lines 5 and 6, which are essentially one Include right angles to each other.

The tips 2 and 3 are thus in a rectangular pattern aligned, with the sides of the rectangle parallel to the straight lines 5 and. 6 run.

It turns out that a cross-sectional view of the plate Λ, for example according to the section plane IH-III, which contains the tips 2 of the projections and the tips 3 of the indentations, has the same appearance as the illustrated front edge 7 of the plate 1, the resulting May designate cross-sectional shape as a sequence of letters "V".

Cross-sectional representations of the plate 1 in transverse planes, as indicated at H-II and which contain the 3aaisseiten of the projections and extortions, have a rectilinear appearance, as shown in Figure 2 of the drawings. Plates of the just described type are hereinafter referred to panels of Type 1 to distinguish them from plates, as depicted in Figure 7 and which be as sheets of Type II "features are.

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If one now looks at FIG. 3 of the drawing, one sees that the stacked arrangement shown contains pairs of plates $ 8/9, 10/11, 12/13 from adjacent plates of type I, which have the general form described with reference to FIGS The distance between the protrusions and the impressions is the same on all panels, but panels 8, 10 and 12 are deep-profiled panels, while panels 9, 11 and 13 are flat-profiled panels. The plates of each plate Paaree are now arranged so 'that the tips, such as tip 14, 3edes advantages \ jump of a flat profile plate, for example, the plate 9' at a certain distance of the bottom of the 3pitze-of the projection {a respective deep profiled plate opposes as shown for the tip 15 of the deeply profiled plate * 8 in FIG. This means that within the pair of plates 8/9, 10/11, 12/13 the tip * · »of the projections of the respective flat-profiled plate of the pair ·» at «pi« lewei »· di · tip 14, must d» m * "Lb" n Lot * ur means "-

m ' the plates lie like the tips of the b # n * ehbtr% etx Tor-

**? "■. ■■■■. ■■■■■■

H «prune · of the deeply profiled plat · de · Pear ··, Wl w« i «· the Spit ·· 15, whereby such a * Abetand» wecn · * the peaks is foreseen that a flow channel, b ·! -

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for example the channel 16, for a heat exchanger Fluid results. These channels, for example the channels 16 are from the right for better visibility hatched top to bottom left.

In the same way are within each pair of plates the tips of the indentations of a flat profiled plate, for example the tip 1? the plate 9, each opposite the tips of the indentations each one deeply profiled Plate, for example opposite the tip 18 of the plate 8, arranged. The tips 17 and 18 of each other opposing extortions of the plates 8 and 9 or the corresponding plate pairs are essentially one on top of the other on and fix the mutual position of the plates of a Paarea, for example the plates 8 and 9. In <$ er embodiment of the invention according to Figure 3 #will be the mutual spacing of adjacent projection tips, for example the Tips 14 and 15 "of the plates a" pair of plates ··, for example 8 uai 9t through * «<» ig & *% «Vfthl der Scheitelwijaicel 4er

4er

Abrtead biiiihlirter ItetKüli · l «r nitttii» ia · * fore! "Can also be found in« »which Vei ·« im iüi »jt. Io lcöm ^ eft Ab-

Abet * ad «» eÄ * ib * ft, Mrteohes «ie l ^ itsec btAAofabnrter Vordränge, btiepielweiee iwlechee the% l * teti 1 # and 15, or «wipe,

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the tips of adjacent indentations, for example between the tips 1? and 18, a pair of plates, zua Example 8, 9 can be used.

. A flow channel 19 for another heat exchanger Fluid emerges in the space between adjacent pairs of plates after the protrusion tips 20 of the deeply profiled plate of a pair of plates, for example 10, 11 and the tips 17 of the blackmail the flat profiled plate, the respective adjacent pair of plates, for example 8, 9i against each other.

The flow channels 16 and 19 each have constant Cross-sectional area, but a cross-sectional shape that changes from cross-section to cross-section.

The other flow channels 21 and 22 corresponding to the flow channel 16, which each form between the other pairs of plates, are hatched in the same direction. The flow channels corresponding to the flow channel 19 are all hatched in the same way from the top left to the bottom right and the flow channels of this type resulting between the plate pairs 10/11 and 12/13 are denoted by 23 »The described. Arrangement results in minimal losses in the penetration of old heat exchanging fluids.

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In the cross-sectional view according to FIG Drawings in which the cutting plane through * the baselines of the projections and pressings of the plates 8.9 » 10, 11, 12 and 13 according to FIG. 3 (and accordingly corresponds to the plane which the line indicated in FIG. 1) II-II contains and perpendicular to the median plane of each plate The flow channels have 16, 19 »21, 22 and 23 parallel walls, but the respective cross-sectional areas are the same as the corresponding cross-sectional areas of Figure 3 · It appears that the fir exchange takes place through all parts of each plate and this form of stacking is special Space-saving and lightweight when the heat exchanger is used in cases where the heat transfer coefficient all between the heat exchanger surfaces and the fluids coming into contact therewith are of the same order of magnitude. It turns out that the cross-sectional areas of the channels of each channel pair, for example 16 and 19, can be selected so that the respective stacked arrangement Requirements are taken into account by the stacking arrangement from flat profiled panels and from deep profiled Plates are built up, each having protrusions and impressions of appropriate vertex angle and corresponding Each plate possesses height relative to the median plane.

Fluid can flow into channels 16, 21, 22 or 19 » fed from the edge sides of the stack arrangement or from these channels are derived, the edges being here expediently have the shape shown in Figure 4, so that they can be connected in a suitable manner to connections or by closure pieces (not shown) for discharging the fluid flows, which used in the edge area of the stack arrangement between the plates are.

In the case in which there is a heat exchange under Desires crossed flow, the channels are in each case skipping order (for example 15, 21, 22) lengthways parallel edges in the area of the connection sides for the one fluid flow closed, while the respective intermediate Channels (for example 19 »23) are closed along the respective other pair of mutually parallel side edges, which is the connection area for the each other fluid flow lie,

Ss be considered in more detail non Figure 5 of the drawings. The stack arrangement, generally designated 24, can be a stack arrangement in terms of its basic structure according to FIGS. 3 and 4, where Pairs of adjacent plates are set against each other and bear the same reference numerals as corresponding plates

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in Figures 3 and 4- and wherein the individual plate pairs take the same position with respect to each other as in the two drawings just mentioned, but now each pair of plates has a third plate is assigned, namely, as Figure 5 of the drawings can be seen, the plate pair 8/9 the plate 25 »the plate pair 10/11 the plate 26 and the plate pair 12/13 The plate 27 · The plate assigned to each pair of plates lies above the respective pair of plates. The called fc th plates 25, 26 and 27 .Ie of a plate safety 3ind flat profiled Plates similar to plates 9 »11 and 13 and each of these additional plates is in such a way over the respective above, deep profiled plate of the associated pair of plates placed that the tips of the projections (for example 15) of down into the protrusions (for example 28) of the aforementioned third plates (for example 25) to protrude after their tips.

This ensures that each record set has a two

Contains ρ flat profiled plates, for example the plates 9 uni 26 or the plates 11 and 27 »which are layered on top of one another are that, for example, with respect to the plates 9 and 26, the tips 14 and 29 are aligned with respect to one another are, while the same for the plates "11, 27 and for other corresponding plates of the complete Stack arrangement according to this embodiment of the invention

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is applicable. The said pairs of flat profiled "plates, for Examples 9 and 26, as well as 11 and 27, delimit flow channels 50 and 31 (hatched from top right to bottom left in FIG. 5 for reasons of "better visibility." are) for a heat exchanging fluid and the Space between the lower flat profiled plate of a pair of plates and that of the pair of plates in question associated third, flat profiled plate (for example between plates 25 and 9, plates 26 and 11 as well the plates 27 and 13) forms pairs of flow channels " nael for another heat-releasing fluid, the channels between the plates each diessr. Plate pairs (For example the channels 32, 33 with regard to the Plates 25 and 9, channels 34, 35 with respect to the plates

26 and 11 and the channels 36, 37 with respect to the plates

27 and 13) are subdivided and in terms of their size by the apex angle of the protrusions and indentations of the upper cover plate of each pair of plates (e.g. 8 resp. 10 and 12), and the last-mentioned * plates are to be regarded as secondary heat exchanger surfaces

The kenal pairs 32 and 33 »34- and 35 as well as 36 and 37 are hatched from top left to bottom right. One Stack assembly of the form shown in Figure 5 at 24 advantageous in terms of space requirements and weight if the

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is used in cases where the heat transfer coefficient with reference to the fluid which flows through the channels 32 and 33 »34 and 35 as well as 36 and 37 flows through, much smaller is as the heat transfer coefficient ηit with respect to that Fluid which flows in the channels 30 and 3Ί. A stack arrangement results for such applications 24- which is lighter in weight and has less space occupies as the stacking arrangement in Figure 3 of the drawings.

From Figure 5 of the drawings is to. infer that all flow channels in cross-sectional planes, which through the common baselines of the protrusions and indentations are laid, have parallel boundary walls, while the cross-sectional area of each channel is essentially the same as in the cross-sectional view according to Figure 5 of the drawings. The projections and Sinpressungen are in terms of their height of one Center plane of the plate in question and selected in terms of their apex angle so that the cross-sectional areas of the different flow channels to the purpose of the stack arrangement 24 are adapted.

Figure 7 of the drawings shows a plate 38 in one Construction which differs from that of Figure 1 of the drawings. Such a plate is referred to in the following as Plate type II designated.

Type II plate has a pattern of regularly spaced projections (for example 39 » ² K)) in the form of four-sided pyramids, which at the same time form a pattern of intersecting furrow-like impressions (for example 4-1, 4-2) which lie between adjacent rows of protrusions »The baseline (for example 43) of each protrusion (for example 44) coincides with the baseline of the respective ^ adjacent protrusion (for example 45) and all of the baselines are substantially 4-m in common Main plane and form the apex of a grid-like pattern of furrow-shaped indentations *

Figure 8 of the drawings shows the cross-sectional profile of a plate 38 according to plate type II, the cross-section being laid out in a plane corresponding to the line YIII-VIII which goes through the tips of the pyramid-shaped projections, cracks. The cross -sectional profile of the plate 38 in the plane corresponding to the section line II-II, namely through the base of the pyramid-like projections and thus through the base of the furrow-like press-in areas "is straight and has essentially the same appearance as the generally shown figure

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FIG. 9 of the drawings shows an exploded perspective view of three plates 46, 4-7 and 48, which are stacked one above the other to form a stacking arrangement in which plates of type I and plates of type Ii are used alternately. The plates 46 and 48 are deep-profiled plates of type I, while plate 47 is a flat-profiled plate of type II. The plates L and 47 form a pair of plates and the plate 48 represents the top plate of a further pair of plates which is offset in two mutually perpendicular directions by an amount which, for example, is the length of the base line (for example 43) of one of the projections of the plate according to type I.

The valleys or the bottom (for example 42 and 49) of the furrow-like impressions in the plates. Type II (e.g. 47) are, measured in a direction parallel ^e to the baseline (e.g. 50) of a protrusion (e.g. 40) apart by an amount equal to the diagonal (e.g. 51) & the outline of a protrusion (e.g. Example 52) is the same as a Type I plate, for example plate 46 or 47. The plates of a plate pair, for example the plates 46 and 47, are assembled in such a way that the valleys of the furrow-like indentations (for example 42 and 41) of the

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underlying plastics. Type II (for example 47) are aligned with the diagonal rows (shown in FIGS . 3 and 9 by dash-dotted lines 53 and 54) of the press-in tips of the plate above (for example 46) of Type I - and are in contact with these tips. -. .

The saddles protruding on the underside, which correspond to the valleys of the above-mentioned furrow-like impressions in the plates of type II (for example 47) "" of each plate pair, are aligned and have contact with the aiagonal rows (for example 55 »56 according to FIGS. 1 and 9 of the drawings) of the projection tips of the respective underlying plate of type I of the respective lower I ^J 3

In Ji'igur 9 of the drawings, the dashed lines show Lines A-A, B-B, C-C, D-D, S-E and F-F indicate the intersection of the individual panels with different levels to indicate which perpendicular to the median plane of the individual plates and perpendicular are oriented to the direction of flow of the heat-exchanging fluids, whereby said direction of flow ' is indicated by the arrow 57 in FIG. Figure 10 of the Drawings shows the cross section through the partial stack according to

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FIG. 9 in the planes corresponding to lines B-B and E-E,. Figure 11 shows the: cross-sectional design with cross-sectional planes corresponding to lines A-A, C-G and F-F and finally Figure 12 of the drawings shows the cross-sectional shape in the cutting plane defined by the line D-D. It it turns out that according to the section diagram along the Section line D-D in Figure 12 of the drawings, two flow paths are provided, which in their shape the Flow paths 16 and 19 according to Figure 3 of the drawings the same and accordingly in their numbering and hatching as the corresponding parts of FIGS. 10 and 11 agree with the representation according to Figure 3,

From an examination of Figure 9 of the drawings it follows that the same sequence of flow channel cross-sections, which is shown in Figures 10, 11 and 12, would also be obtained if the direction of flow was correct

the arrow 58 of Figure 9 would be selected. It follows from this that this form of a stacked arrangement for heat exchange Suitable for crossed currents of heat-throwing agents is·

A heat exchanger from a stack arrangement according to Figures 9 to 12 of the drawings has flow channels

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ORKSINAL

ar

for the heat exchange η fluid, whose ■ Cross-sectional area differs from cross-section to cross-section is what from the standpoint of flow losses of the heat exchanging Fluid is seen as a disadvantage »The changes in cross-section are not very great, however strong and the losses can be in certain use cases be accepted "

Stacking arrangements in which only plates of type I two plate shapes are required, • namely a deeply profiled shape and a flat profiled one Shape." The Iferkzeiige for the manufacture of panels of the Type I are very expensive and in the case mentioned two sets of such tools are necessary Production of the plate according to Type II is, in contrast, significantly cheaper, since it is made in a simple manner from a metal plate can be made ^ cut into the crossed furrows that can be made by milling or planing. For this reason, stacking arrangements are those made from deeply profiled plates, type I using an expensive 7 / tool and made of flat profiled plates Type II built using a cheap tool are cheaper to manufacture than stack assemblies of two different types of type I plates, apart of course from very large berries. Through the

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advantage just described, the disadvantage of increased losses due to that is: 411er sänderungen cut in the flow path along a flow line to some extent compensated _o

Stack assemblies for 'heat exchangers according to the invention can also be designed in a different way than that described above. For example! Can profiles the projections and / or the impressions of at least some plates in cross-sectional planes parallel to the plate plane to be curved "

In a suitably modified embodiment of a stack arrangement according to the invention The protrusions and / or indentations, flattened tips, are the panels that make up the stacking arrangement If * is relatively thick, it may be easier to make protrusions and indentations with a flattened apex punch than to form the projections and impressions fully pyramid-like »A stack modified in this way— arrangement can! in the case of the use of metal plate *! can be made particularly rigid by spot welding a small number of flattened protrusions and / or indentations of a plate with the corresponding protrusions

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1 Q 9 8 8 7 / O Λ 9 8 bad

or impressions of the adjacent plate firmly connected will. The flattened apex simplify this Spot welding.

The stack arrangement can be sealed along the edges of the flow channels by making the edges more appropriate Panels are flanged together "

A stack arrangement for a heat exchanger according to% of the invention can be used for heat exchange between liquids or gases, or gases and liquids, wherein a counter-current, a direct current or a gekxeuster through current can be provided depending on how the edges of the stacked plates are sealed "

In the foregoing description and in the following claims, the terms "projection" and "press-in" relate to the shape of a plate at Be _Λ

Approach from one side, with a protrusion being a point which is closer to the viewer than the base of the protrusion, while an indentation with its base closer to the beholder than at the tip and looking at the same plate from the other side, it appears a projection now as an indentation and vice versa «A description of the stack arrangement, for example, according to

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Figure 3 of the drawings, which applies to the position shown, is of course no longer correct if the stacking arrangement is turned over (whereby, of course, the stacking arrangement itself does not change its structure in any way), unless the terms "projection "and" press-fit "also au -alen positions are reversed.

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Claims (1)

Claims ; ■ 1.1 Made of indented panels Formed stacking arrangement for heat exchangers, characterized in that several stacked one on top of the other Plate pairs (8, 9; 10, 11; 12, 13 or. 46, 47) are provided, the individual plates with a regular pattern of projections (39 * 4-0 or 52) are provided and arranged with respect to one another in such a way that the projections each have a plate with its Vertices into the cavities (16, 21, 22 or 23, 35, 37) protrude, but do not fill them in, so that between the plates there is a pair of plates results in a first flow channel and that the plate pairs are in turn stacked so that they between each other a second flow channel (19, or 30, 31) form. 2. Stacking arrangement according to claim 1, characterized in that the tips (14, 15) of the projections "■" 887/04 ^ 8 the plates of a plate pair (8, 9; 10, 11; 12, 13) on the two plates each have the same distance from one another, but that the projections are each one as
flat profiled plate to be designated (9, 11 »13)
rise less high from a central plane than the projections of the other plate (8, 10, 12) that is to be designated as deeply profiled. ^ 3 β stacking arrangement according to claim 2, characterized in that at least the deeply profiled plate (8, 10, 12) of a pair of plates has a regular pattern of projections (52) as well as of intervening impressions (59) which extend from a central plane of the Plate from each after opposite
Directions extend, wherein the base lines of the projections coincide with the base lines (60) of the respective adjacent indentations and in said fc central plane of the plate are located (Figure 1). 4. stacking arrangement according to claim 3, characterized in that that the flat profiled plate (9, 11 »13) of a pair of plates has a regular pattern of both Projections (52) as well as from intervening - 30 - 10l887 / 04i8 * ■■■ -. "1751H6 Has pressings (59) which extend from a common central plane of the plate in opposite directions, the base lines (60) of the projections coinciding with the base lines of the respective adjacent press-in areas and being located in said common central plane of the plate . 5. stack arrangement according to claim 4, characterized ^ characterized in that each pair of plates (8, 9; 10, 11; 12, 13) has a third, flat-profiled plate (25, 26, 27) is assigned, which in each case on the flat-profiled plate (9 »11, 13) of the respective plate pair facing away from the deeply profiled plate (8, 10, 12) is placed on this in such a way that the Apex (14, 28) of the projections of the flat-profiled Plates are aligned so that between said third plate and the deeply profiled plate one Pair of plates each have a third flow channel (32, 34, 36) ^ * 6. Stape! Arrangement according to claim 5, characterized ' by such a connection of the 'flow channels along the edge of the plate, that the first, between the plates - 31 - 109887/0498 ■ flow channel formed by each pair of plates (33, 35, 37) and said third flow channel (32, 34, 36) as a common flow path are connected, which of the deep-profiled plate (8, 10, 12) each one Plate pair is divided, which forms a secondary heat exchanger surface and by the extent of the elevation its projections (52) and indentations (59) determine the cross-sectional area of said common flow path from a common center plane of the plate, and that the intermediate space (30, 31) between the flat profiled plate (9, 11) of a pair of plates and the third, flat-profiled plate (26, 27) assigned to a different pair of plates forms second flow channel. 7. stacking arrangement according to claim 3, characterized in that the flat profiled plate (47) each pair of plates has projections (39, 40, 45) which rise from a common plane, wherein each base line (43) of a projection coincides with the base line of an adjacent projection and the projections in parallel rows (61, 62; 63, 64) arranged in two mutually perpendicular directions 10 9887 / 04-9 8 Β * © and from each other by furrow-like indentations running in similar parallel rows (4I, 42, 49) are separated and wherein the distance between the rows of Yorjüngen the diagonal (51) of the plan of a Projection (52) of the deeply profiled plate (46) of a pair of plates is the same, furthermore the lines forming the tips of the "protrusions of said Connect flat profiled plate and which parallel to the baselines of said furrow-like Indentations run on the diagonals of the projections the deep profiled plate are aligned and wherein further the diagonal connecting lines (53, 54) of the tips (65) of the indentations in each case on the Back of the deeply profiled plate (46) up to the valleys of the furrow-like Sinpressungen of the flat profiled plate (47) reach into and these touch and further characterized in that the deeply profiled plate (48) of an adjacent pair of plates with the diagonal rows (55, 56) of the tips of the Projections is aligned with the saddle-like apex and this touches which of the furrow-like Indentations (41, 42, 49) on the back of the 8AD 88 7/0498 flat profiled plate (47) of an upper pair of plates are formed. 8. stack arrangement according to one of claims 1 to 7, characterized in that the apices of the projections are flattened. 9 »Stacking arrangement according to claim 1, characterized ^ shows that there are indentations of complementary shape between the projections and that the apex both the protrusions and the indentations are flattened. 10. stacking arrangement according to claim 9, characterized in that the abutting vertices of the projections and press-fit of adjacent plates are connected to one another by spot welding. ^ 11. Stacking arrangement according to one of claims 1 to 10, characterized in that the projections and indentations have a curved profile. _ 34. _ BAD OFFICIAL 109887/0498 Blank page