WO1983001401A1

WO1983001401A1 - Method for manufacturing a heat exchanger

Info

Publication number: WO1983001401A1
Application number: PCT/CH1982/000111
Authority: WO
Inventors: Anstalt Feraton
Original assignee: Jovy, Herbert; Schuster, Wilhelm; Stahl, Jürgen
Priority date: 1981-10-14
Filing date: 1982-10-13
Publication date: 1983-04-28
Also published as: JPS58131000A; EP0077009A1

Abstract

Two metal bands (3, 4) having a corrugated profile are deformed and are given the form of a spiral. At the same time, a first flat band (7) and a second flat band (8) are subjected to cold-working so that each of them forms a flat spiral of which the whorls describe the same plane. Said flat spirals (7, 8) form the ceiling and the floor of a first channel (1) for the fluid of a heat exchanger and are connected by a continuous working process to the metal band (3, 4) by their respective longitudinal edges. Thus, a first spiral-shaped channel (1) is obtained. Between the whorls of the channel (1), there are arranged additional flat bands (9, 10) which are also deformed into flats spirals, and which are fixed by their edges on the angular portion of the first channel (1) for the fluid. Thereby, a second channel (2) for the fluid is obtained. Said method being implemented as a continuous process, the manufacturing of such heat exchanger is extremely economical.

Description

Process for manufacturing a heat exchanger

The present invention relates to a method for producing a heat exchanger, each having a channel for the fluids flowing through it, each channel running in a spiral, from two corrugated profiled, metal side wall sections and flat metal band sections forming the channel cover and the channel bottom is described.

Exists in such heat exchangers, the need for the cheapest possible production, wherein the production method to be continuous, that is to have a minimum ^"on separate production steps.

The aim of the invention is a method that meets the above requirements.

The method according to the invention is characterized in that, to form the side walls, at least one metal strip is profiled in an undulating manner such that it has at least one undulating region, the waves of which run in the longitudinal direction of the metal strip, which metal strip is simultaneously cold-formed into a spiral that To form at least a number of channel floors and channel ceilings, a flat strip is cold-formed into a flat strip spiral, the turns of which describe a common plane, and that the wavy, profiled, spiral-shaped metal strip is connected to the longitudinal edge of at least one of the flat strips deformed to form the flat strip spiral , such that each Flat strip protrudes from the wavy profiled metal strip and thus fluid channels with a rectangular cross-sectional shape are formed.

The subject matter of the invention is explained in more detail below with reference to the drawings, for example. 1 shows a diagram, partly in section, of the production of a first fluid channel,

2 and 3 schematically in section the complete manufacture of the heat exchanger, FIG. 4 a top view of the heat exchanger manufactured according to FIGS. 1-3,

5 - 7 a further embodiment of the method according to the invention,

8-10 a still further embodiment of the method according to the invention, and

Fig. 11. Diagram and in section a multilayer heat exchanger with spiral fluid channels.

Reference is now made to FIG. 1. Two metal strips 3, 4, which consist of any suitable, ^" highly thermally conductive metal or metal alloy, for example copper, are deformed in a roller or rolling machine in such a way that they are profiled in a wave shape and at the same time formed into a spiral The waves run in the longitudinal direction of the respective metal strip 3, 4. At the same time, two metal flat strips 7, 8 are cold-deformed in such a way that they form a flat strip spiral, the turns of which describe a common plane. The profiled metal strips 3, 4 with the spiral-- The flat strips 7,8 are brought together and the strips and strips are joined together along their longitudinal edges 5,6 This connection can be carried out by means of welding, brazing or soldering, depending on the respective metal A roller seam welding machine is used for the connection, for example. 1 structures shown before, namely a spiral-shaped first fluid channel 1, which has wave-shaped profiled side walls 3, 4, a laughing cover band 7 and a flat bottom band 8. The. 2 shows in simplified form a section through this first spiral-shaped "^{" ■ ■} fluid channel 1. The distance X between the turns is now selected depending on the width of a third 9 or fourth flat belt 10. These flat strips 9, 10 also run spirally, form a flat strip spiral and are produced in the same way as the first and second flat strips 7, 8. The third 9 and fourth flat strips 10 are now inserted into the spaces between the turns of the first fluid channel 1 such that the third flat strip 9 with the first flat strip 7 and the fourth flat strip 10 with the second flat strip 8 escapes and on, according to. 3, also welded at its longitudinal edges. The second fluid channels 2 are now also formed. It is evident that the process described above is a continuous one and the production of the first 1 and second. 2 fluid channels, which. Fluid channels form a spiral heat exchanger that is extremely easy to carry out. 4 shows a simplified top view of a heat exchanger produced in this way.

A further embodiment of the method according to the invention will now be described with reference to FIGS. 5-7. As shown in FIG. 5, a flat metal strip is deformed in such a way that it has a flat longitudinal center section 11, to each of which a wavy profiled longitudinal section 12, 13 adjoins. A flat longitudinal edge section 14 or 15 is connected to each profiled longitudinal section 12, 13. The width of the flat longitudinal central section 11 is selected such that it is equal to the width of the respective flat strips 17, 18 deformed to form the flat strip spiral. The width of the flat longitudinal edge sections 14, 15 is selected such that they are metallurgically bonded together when.

OM the same width of the longitudinal central section 11 on egg. The metal strip present in this way is then bent at right angles at the transition regions 16 between the flat and undulating longitudinal sections, so that the hollow profile shown in FIG. 6 is formed. The longitudinal edges of the longitudinal edge sections 14, 15 lie directly opposite one another and can be connected to one another, so that a first spiral fluid channel 1 is again formed. For the sake of order, it should also be noted that when the individual sections are bent, the deformation to form the spiral fluid channel is carried out at the same time. Thus, there is another structure in front of, ^'which is apart from the welding points is equal to the structure shown in Fig. 1, namely a first spiral-5-extending fluid passage 1. Between the wind. Now, flat strips 17, 18 deformed to form the flat spiral are inserted again and metallurgically connect them to the bending points of the metal strip 5 deformed to the first fluid channel 1, so that the. 7 is formed in particular from FIG. 7 that the cross-sectional area of the first fluid channel is different from that of FIG. 2. These cross-sectional areas are obviously chosen depending on the fluids which flow through the respective channels 8-10 describes a further exemplary embodiment of the method according to the invention, in which two metal strips are profiled in such a way that they have an undulating longitudinal central section 19, on each of which a flat longitudinal edge section Both metal strips profiled in this way are then bent at right angles at the transition regions 16 between the longitudinal center section 19 and the longitudinal edge sections 20, 21 and to the shape shown in FIG. 9, that is to say again a "first fluid" - Form 5 channels 1 and then connect them together. This deformation takes place again simultaneously with the deformation spiral. It should be noted here that in one metal strip the flat longitudinal edge sections 20, 21 are bent in such a way that these longitudinal edge sections 20, 21 point towards the center of the spiral, and obviously in the other metal strip they borrowed from this center of the spiral point away. Thus, the structure shown in FIG. 1 is again available. Between the turns of the spiral described by the fluid channel 1, flat strips 17, 18 deformed to form the flat ribbon spiral are again arranged, the distance between the turns of the spiral fluid channel 1 being equal to the width of the flat strips 17, 18. These flat ribbon spirals 17, 18 are then connected at the bending points, the metal strips forming its first fluid channel 1, and the second fluid channel 2 is thus formed again.

If one now looks at the design of the heat exchanger according to FIGS. 3, 7 and 10, it can be seen that an excellent heat exchange takes place through the profiled side walls, for example 3, 4, but the fluid channel ceilings or fluid channel bottoms lose heat. apart from ^■ any insulation).

In order to remedy this disadvantage and to enlarge the heat exchange surface of a given heat exchanger as such, several structures according to FIGS. 3, 7 and 10 are now stacked on top of one another, so that a multilayer, spiral heat exchanger is present, as in FIG 11 is shown in simplified form. Apart from the outermost fluid channels 1, 2, each fluid channel 1. surrounded by fluid channels 2 or each fluid channel 2 surrounded by fluid channels 1, so that on the one hand the heat exchange surface of the heat exchanger is relatively large and on the other hand the areas generating heat loss are relatively small. The fluid channels 1 and fluid channels 2 of each laminated body of this multilayer heat exchanger are then connected to one another by a distributor, so that an external Very crowded heat exchanger is present.

The manufacturing processes described above, namely the profiling, the bending and finally the metallurgical joining, permit a continuous manufacturing process which can be carried out completely automatically on a machine, so that the heat exchanger can be manufactured in a short time and accordingly inexpensively.

REPLACEMENT LEAF

Claims

Patent claims

1. Method for producing a heat exchanger, each having a channel (1, 2) for the fluids flowing through it, each channel running in a spiral, from two corrugated, profiled, metal side wall sections and forming the channel cover and the channel bottom ¬ the flat metal strip sections are described, characterized in that at least one metal strip is corrugated to form the side walls in such a way that it has at least one undulating area (3, 4; 12, 13, 19), the waves., in Längsrich¬ of the metal strip extend tung which Metallstrei¬ fen is cold-formed simultaneously in a spiral that, to form at least one channel number, and channel ^floors'. ^' each cover a flat ribbon (9,10; 17,18). a flat strip spiral is cold worked, the windings of which describe a common plane, and that the wavy profiled, spiral-shaped metal strip with the longitudinal edge. at least one of the flat tapes deformed into the flat tape spiral. (9,10; 17,18) is connected in such a way that 0 each flat band of the wavy profiled. Metal strip protrudes and thus fluid channels are formed with a rectangular cross-sectional shape.

2. The method according to claim 1, characterized in that two metal strips (3, 4) are corrugated and deformed along their longitudinal edges (5) with the respective longitudinal edge (6) of a first (7) into a flat ribbon spiral, the flat band forming the duct ceiling and a second flat band (8), which is formed into a flat band spiral and forms the duct bottom, are connected by 0 a first, spiral-shaped. To form fluid channel (.1), wherein the distance (X) between the windings equal to the width of a third (9) and a ^'is the fourth to Flach¬ ribbon spiral deformed flat strip (10) that the latter flat strips (9,10 ) between the turns of the

OMPI first fluid channel (.1) are arranged such that the third flat band (9) is aligned with the first (7) and the fourth flat band (0) with the second. (8), and that the longitudinal edges of the third (9th ) or fourth (10) ribbon with the longitudinal edges of the first. (.7) or second flat belt (8) are connected to form a second fluid channel (2) (Fig. 1-3)

3. The method according to claim 1, characterized in that the metal strip is profiled in such a way that it has a flat longitudinal central section (1.1) - whose width is equal to the width of the eternal. Flat-band spiral deformed flat band (-17, 18) is connected to each longitudinal central section (.11) on each side by a wavy profiled longitudinal section (12, 13), to which in turn a flat longitudinal edge section (. 14, 15) connects that the metal strip at the respective

Transition areas (16) between ^' flat longitudinal sections (11, 14, 15) and undulating longitudinal sections (12, 13) are bent at right angles to form a hollow profile ^" in which the longitudinal edges of the longitudinal edge sections (14/15) lie directly opposite one another, that the longitudinal edges are connected to one another in order to form a first spiral fluid channel (1), in which the distance between the turns is equal to the width of the respective flat band (17, 18) deformed into the flat band spiral, that between the turns of the first spiral fluid channel (1), a first (17), aligned with the flat longitudinal central section (11) and a second, with the flat longitudinal edge sections (14, 15) aligned spiral flat ribbon (18) is used, which Flat strips (17, 18) are connected at their respective longitudinal edges to the bending points (16) of the metal strip forming the first fluid channel (1) by a second To form fluid channel (2). (Fig. 5-7) 4. The method according to claim 1-, characterized gekennzeich¬ net that two metal strips are profiled such that they each have a wavy profiled longitudinal central section (19) - ", to which a flat longitudinal edge section (20, 21) adjoins on both sides, that the metal strips at the two transition regions .. (1.6) 5 between the longitudinal central section (19). and the longitudinal edge sections (20, 21) are bent at right angles, the bent longitudinal edge sections (20, 21) against the center of the spiral in the case of one metal strip and the longitudinal edge sections (20, 21st) in the other metal strip. point away from the center 10 of the spiral, - that ... the two metal strips are connected to one another along their longitudinal edges in order to form a first spiral fluid channel (1) in which the distance between the turns is equal to the width of the (17, 18) 15 is that between the turns of the fluid channel, a first and a second spiral, aligned with the respective, flat longitudinal edge sections RMIG verlaufen¬ the ribbon (17,18) is used which flat ribbons are joined at their respective longitudinal edges with the bending points (16) 20 of the first fluid passage (1) forming metal strip to a second fluid channel. form. (Fig. 8-10)

5. Method according to one of the preceding claims, characterized in that several, a first

25 and a second. Formations containing spiral-shaped fluid channels are stacked on top of one another. ground, such that at any point zwei.erste second or two fluid channels un¬ indirectly abut each other, and that the first Fluid¬ channels at both ends, each having a first and ^'second fluid passages 30 at both ends, each with a second manifold get connected.

6. Heat exchanger, manufactured according to, the method according to claim 1, characterized. by several, stacked, spiral-shaped structures, whereby _. every game

35 raliform structures on a first and a directly adjacent second spiral fluid channel

LATT __ ° M TU indicates that all first fluid channels are connected at both ends to a second distributor piece, with no first or two second fluid channels directly abutting one another at any point.