DE3403488A1 - Heating wall and a method for producing it - Google Patents

Abstract

The invention exhibits a heating wall having a plurality of flat tubes which are arranged above one another and are connected to one another on their flat sides by pressure welding. Oval openings, which communicate on the flat sides, are used for the forced circulation. It is of the essence that a defined gap is provided in each case between the narrow sides of the flat tubes, and that annular elements positioned for the purpose of pressure welding between the flat tubes simultaneously serve as spacers between the tubes situated above one another. In this arrangement, the tube ends are individually sealed on the end face, in each case. <??>The invention also exhibits a method for producing the heating wall which is essentially based on the fact that the flat tubes which are connected on the narrow sides by pressure-welding are sealed on the end faces before the openings are introduced. The tubes, which have already been sealed and cleaned on the welding seam, are then provided with openings and pressure-welded over annular elements which simultaneously serve as spacing elements. <??>The great advantage of the novel heating wall and of the novel method of production is the provision of a heating wall which permits the tubes to be painted all around in an anticorrosive fashion and has a relatively large heating surface. <IMAGE>

Description

v / pe / er

Arbonia AG, CH-9320 Arbon

Heating wall made of flat tubes and process for their manufacture

The invention relates to a heating wall made of flat tubes according to the preamble of claim 1 and to a method for its production according to the preamble of claims 11 and 13 and 14.

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Such heating walls are made up of a plurality of narrow sides lying one above the other or lying next to one another, communicating with each other and formed at the end of the tubes.

From CH-PS 488 520 a heating wall is known at which a plurality of in cross-section at least approximately rectangular flat tubes, which in their Narrow sides have overlapping elongated openings, with their narrow sides lying snugly against one another

are arranged. Between each two opposite The narrow sides of adjacent flat tubes are made of welded inserts in the area of the elongated openings Pure iron inserted so that they each extend around an opening. By compressing the Flat tubes are welded by a welding current to fuse with the edges of the welded inserts brought openings. The entire material of the welding inserts is used here to weld the Openings of two after the welding process with their narrow sides lying on top of each other Flat tubes. The seamless rowing of the flat tubes of this heating wall does not allow a corrosion-proof All-round painting of the pipes, so that it is not uncommon for the contact surfaces to corrode very quickly the pipes out takes place. Furthermore, this known heating wall has due to the fact that they lie directly on top of one another the narrow sides of the tubes have a relatively small free area, whereby the The heating effect of the heating wall is also relatively low. The front sides of the relatively large After the pipes have been welded together, pipes are closed by a common end strip, which is welded to the pipe ends.

These weld seams then have to be plastered, which means additional manufacturing costs.

From CH-PS 592 290 a radiator of another type is known in which on vertical collector pipes several horizontal flat tubes on top of one another and at the same time flat-sided at a distance from one another are attached by projection welding so that each flat tube with each collector tube over two

openings communicated. For the purpose of projection welding the opening edges on the collector tubes are printed outwards, so that these bulge edges stand at the corresponding opening edges of the respective flat tube during the welding process. During the pressure welding process, the respective flat tube is pushed over its relatively elastic broad side pressed onto the collector pipe until the flat pipe is snug against the collector pipe. About a deformation To prevent the flat tube while the welding pressure is being exerted, additional support parts are required be drawn into the flat tubes, which leads to a relatively complex construction. Further Here, too, the disadvantage of the flat tubes and the vertical tubes lying tightly on top of one another is given, see above that also a corrosion-proof all-round painting of the flat tubes or collector tubes is not possible. Any distance is available between the flat tubes themselves, which has advantages in terms of heating technology given are. However, this advantage has not yet been used in heating walls without collector pipes.

From CH-PS 420 540 a method for producing radiators is known, through which the Radiators at the ends of their narrow sides with slots with the help of special punching tools be provided. The tubes, which are laid on top of one another, are then fitted with a Weld seam provided. Here, too, the disadvantage is that the tubes lie tightly one on top of the other and thus the Relatively small surface and the lack of all-round paintwork.

Compared to this prior art, the object of the invention is to provide a heating wall and a method for the same Specify manufacture that allow the tubular elements of the heating wall maximum protection against corrosion and at the same time have the largest possible heating surface. Furthermore, the Heating wall can be provided with holding elements in a simple, quick manner, so that overall results in inexpensive manufacture.

This object is achieved by a heating wall with the features of claim 1 and claims 2 to 10 and achieved by a method for producing such a heating wall according to claims 11 to 14.

Accordingly, the heating wall according to the invention has a plurality of one above the other or next to one another, connected to one another on the narrow side by pressure welding, communicating through openings and flat tubes closed at the end. To carry out the pressure welding, additional, preferably the shape of the openings approximated, i.e. provided essentially ring-shaped elements of each of which two are arranged between the opposite narrow sides of two adjacent tubes are. Furthermore, a holder is arranged on the rear of the heating wall. It is essential that between a defined gap (distance) is provided for each of the adjacent flat tubes. The one for pressure welding ring-shaped elements used serve as spacers between the successive tubes. In addition, the pipe ends are

of the relatively narrow and overall small-volume flat tubes, each using methods known per se individually closed at the front.

The defined gap provided according to the invention between each two adjacent pipes produces two substantial advantages. On the one hand, a corrosion-proof all-round coating is made possible. For another, will this significantly increases the heat radiating surface of the radiator elements.

The inventive arrangement of annular elements between the narrow sides of the flat tubes and the simultaneous use of these ring elements as spacer elements and as a welding element for pressure welding is an inexpensive, simple and quick production of these heating walls ensured.

The pipe ends of the heating wall according to the invention are each closed individually at the end. Through this the advantage is given that each flat tube individually after closing to the corresponding Welds can be easily cleaned.

Very simple and inexpensive methods can be used as a known method for closing the end face are used because according to the invention, relatively narrow tubes, that is to say with a width of approximately 9 mm, are used Find. For example, the open ends of the flat tubes can be rolled up and subsequently Welding, i.e. closed without insert parts or additional caps. Also can

according to a further possibility a sheet metal strip, which has the dimensions of the clear width of the flat tube has, inserted into the front opening and fused here.

In a further development of the inventive concept, the pipes are fixed on the back of the heating wall U-shaped profiles welded to the bottom Have punchings, from each of which a tab protrudes vertically, the thickness of which is the width of the gap between the tubes. Furthermore, the width of the U-leg is chosen so that Thermally conductive lamellas can be applied unhindered.

According to a development of the inventive concept, the respective ring-shaped element preferably has a circular cross-section and is at a small distance from the opening edge of the associated Opening arranged around this circumferentially. This allows the material of the element to flow in prevented from entering the opening during the welding process. It is also avoided that the edge of the respective Opening is bulged or indented when the construction is welded by the pressing pressure. The element can of course also have a cross-section other than circular, if this is the case Should prove appropriate.

The annular element can in a further embodiment according to the invention also a before closing the pipe ends in the narrow side of the

oval bulge introduced into the respective flat tube.

According to a first embodiment, these bulges are on the opposite sides Narrow sides of the flat tubes arranged and formed in the same way, the end faces of the Bulges come to lie on top of each other and tightly together during pressure welding be welded. The two bulges welded together together form the spacer element between the adjacent pipes. In this embodiment, additional components that are to be arranged in a precise manner between the adjacent surfaces, saved.

According to a second embodiment can only be in one On the narrow side of two adjacent tubes, at least one bulge can be provided, which is in contact with the flat edge of the aligned opening of the other pipe. In this case, the Bulge a height corresponding to the desired gap between two adjacent pipes while in the previous case, the heights of two opposing bulges to the width of the the desired gap between two adjacent pipes.

In a further embodiment of the invention, the annular element can be an oval sleeve, the oval, which belongs to each other and was previously inserted into the narrow sides of the flat tubes

Indentations is inserted. This embodiment also makes a simple and accurate one Allows assembly of the pipe and ring elements to be connected to one another before pressure welding.

The manufacturing method according to the invention is thereby characterized in that relatively narrow flat tubes cut to the necessary length will. Thereafter, the end faces of the individual flat tubes by means of one of the aforementioned known or other methods individually closed. Oval openings are made in the narrow sides of the Flat tubes introduced, preferably with the help of an obliquely ground punch, which is pressed into the pipe from the outside. The corresponding slug is thrown over or rolls over as Flaps in a substantially spiral shape in a corner towards the end of the pipe, causing the circulation of the heating medium is not disturbed. There is no unwanted deformation of the pipe wall. Thereafter the pipes are placed on top of each other according to the planned forced circulation, with the oval Rings are placed in between. The oval rings are evenly spaced both in places Where there are openings, possibly also in places without openings, so that a uniform and permanent connection is made possible. This is followed by pressing the structure together and pressure welding such that the predetermined distance between the narrow sides of the successive Flat tubes is retained. This allows a round

repainting of the flat tubes of the heating wall produced in this way be made. Finally, the U-shaped bracket is attached to the rear of the tubes, with tabs punched out vertically from the retaining profiles into the spaces between inserted into the pipes. In addition, the bracket is welded to the back of the pipes. Even the L- or T-shaped connection pieces for water inlet and outlet are attached in a known manner. The method according to the invention for producing the heating wall according to the invention is a relative one simple process, which is a cost-effective and at the same time simple production of the heating wall enables.

When using the aforementioned two other oval ring elements, the method according to the invention is corresponding modified. Thus, the bulges or indentations can only be made before the end faces are closed be introduced into the narrow sides of the pipes. The elongated holes, however, can also be used in these embodiments or manufacturing process as in the first variant only after the pipe ends have been closed brought in.

The subject of the invention is hereinafter based on in the accompanying drawings illustrated embodiments explained in more detail.

It shows:

1 shows a partial vertical longitudinal section through a heating wall according to the invention, 5

2 shows a section along the line II-II Fig. 1,

3 shows a section along the line III-III Fig. 1,

4 shows a heating wall according to the invention with forced circulation in a first embodiment,

5 shows a heating wall according to the invention with forced circulation in a second embodiment,

6 shows a partial perspective view of the rear of a heating wall according to the invention, 20th

7 shows a partial section through a mounting element of the heating wall,

8 shows a view according to arrow VIII from FIGS. 7, 25

9 shows a section along the line IX-IX from FIG. 7,

10 shows a partial longitudinal section through a connection point with a communication opening according to one further embodiment according to the invention,

Pig. 11 a 'partial longitudinal section through a Connection point with communication opening in a third embodiment according to the invention,

12 shows a front view of a connection point according to Fig. 11, and

13 shows a front view of a connection point of a fourth embodiment according to the invention.

As can be seen from the drawing, there is an inventive Heating wall composed of several flat tubes 1 arranged one above the other or next to one another, which are connected to their narrow sides 2 are arranged adjacent with a precisely spaced gap 3. In the narrow sides 2 of the adjacent flat tubes 1, oval openings are arranged in each of the tubes 1 have the same training and are arranged exactly opposite one another, between the neighboring Narrow sides 2 of the adjacent flat tubes 1 oval rings 5 are arranged, which are concentric around the Openings 4 are laid around and have slightly larger dimensions than the openings 4. At the same time these rings are narrower than the narrow side of the flat tubes, so that a full and at the same time pleasing ' Support of two adjacent flat tubes on the rings 5 is given.

In Fig. 4 and 5, two heating walls are shown at which through differently arranged connection or communication openings a different one Forced circulation is achieved. It will be seen-

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lent that by arranging the openings any Forced circulation can be achieved while maintaining a uniform and stable connection the tubes is realized with constant narrow-sided spacing.

From Fig. 6 it can be seen that a U-shaped bracket 6 is attached to the rear of the heating wall. As can be seen from FIGS. 7-9, there is a tab 7 on the side of the holder 6 facing the tubes bent out vertically by punching. This tab 7 is dimensioned such that it is in the gap between two adjacent flat tubes 1 can be inserted.

As also FIG. 6 shows, the connection pieces for the water inlet and outlet are on the back of the pipes Outlet, here an L-shaped connection piece 8 for the water inlet, attached.

In the second embodiment shown in Fig. 10 * - shape of the heating wall according to the invention are on the narrow side of the flat tubes 1 opposite one another and identical indentations 9 formed are provided. At the front of these indentations are the openings 4 are made here. A sleeve 10 is inserted into two aligned indentations 9 in such a way that that the sleeve 10 rests with its end face on the outer inclined surface of the indentations. Because of this Interposing a sleeve 10 is given the possibility of a correspondingly large spacing of the To achieve flat tubes 1.

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A further embodiment is shown in FIGS. 11 and 12. Here 1 bulges 11 are provided on the opposite narrow sides of adjacent flat tubes. In the assembled state, the aligned bulges stand on top of one another and can have passage openings 4 in their end face. The bulges have the same height on and their heights together give the distance between two adjacent flat tubes 1, namely the Gap 3.

Finally, FIG. 13 shows a fourth embodiment in which only one on the narrow side of the flat tubes 1 at least two bulges 11 'are provided, which, as already described, with Openings are provided and on the flat edges of the aligned openings in the narrow side of the adjacent flat tube 1. The height of the bulges 11 'on one of two adjacent ones Flat tubes thus determines the height of the gap 3 between these two flat tubes.

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Claims (14)

HOFFMANN · - EiTLE & PARTNER " PATENT AND LAWYERS PATENTANWÄLTE DIPL.-ΙΝβ. W. EITLE DR. RER. NAT. K. HOFFMANN DIPL.-ING. W. LEHN DIPL.-ING. K. FDCHSLE DR. RER. NAT. B. HANSEN · DR. RER. NAT. HA. BRAUNS DIPL.-ING. K. GORG DIPL.-ING. K. KOHLMANN · LAWYER A. NETTE v / pe / er Arbonia AG, CH-9320 Arbon Heating wall made of flat tubes and process for their manufacture Patent claims:
1. Heating wall with a plurality of one above the other or side by side, closed at the end, with each other on the narrow side by pressure welding connected and communicating through narrow-sided openings (4) and Piach tubes (1), where for pressure welding the shape of the openings (4) approximately having, essentially ring-shaped elements (5, 10, 11) in the area these openings (4) are inserted between the adjacent flat tubes (1), and - At least one holder (6) is arranged on the back of the flat tubes (1), ^ ABELLASTRASSE 4. D-SOOO MUNICH 81 TELEPHONE CO89} 911087. TELEX 5-29619 CPATHEJ TELECOPER 918356 characterized, that between each two adjacent flat tubes (1) a defined gap (distance) (3) is provided, that the ring-shaped elements (5, 10, 11) used for pressure welding at the same time as Spacers are formed between the respective adjacent tubes (1), and that the pipe ends are each closed individually at the end. 2. Heating wall according to claim 1, characterized in that the gap (3) between two adjacent flat tubes (1) is designed in such a way that in this at least one horizontal, from the rear of the to the U-shaped brackets (6) attached to the heating wall can be pushed in by punching out bent tabs (7) is. 3, Heizwanö "according to claim 2, characterized in that that the width of the legs of the U-profile of the bracket (6) is approximately equal to the width of the heat conducting fins arranged on the rear side. 4. Heating wall according to claim 1, characterized in that the tubes (1) have a relatively small volume with a relatively small width (9 mm). 5. Heating wall according to claim 1, characterized in that that the respective element is an oval ring (5), which preferably has a circular cross-section and at a small distance from the edge of the oval opening (4), circumferentially around it is. 6. heating wall according to claim 1, characterized in that the respective annular element one before Closing the flat tube (1) in question is formed oval bulge (11). 7. heating wall according to claim 6, characterized in that at least one bulge (11) on the two opposing narrow sides (2) of two adjacent tubes (1) in the same arrangement and the same way is provided, the end faces of the bulges (11) each being substantially are arranged mirror-symmetrically one on top of the other (Figures 11 and 12). 8. Heating wall according to claim 6, characterized in that · only in one narrow side of two adjacent pipes (1) at least one bulge (II ¹ ) is provided which is in contact with the flat edge of the opening (4) in alignment therewith of the other pipe (1) stands (Fig. 13). 9. heating wall according to claim 1, characterized net that the annular element has the shape of a sleeve (10). -A- 10. Heating wall according to claim 8, characterized in that that on the narrow sides (2) of each successive flat tubes (1) oval indentations (9) in the same arrangement and the same design are provided, the sleeves (10) essentially are arranged at the end supporting in opposite indentations (9), 11. A method for producing a heating wall according in particular to claim 1 and 5, characterized by the following process steps: Cutting a large number of flat tubes (1) to length as required,
15th separate closure of the individual flat tubes (1) at their end faces by means of a per se known procedure, - Making at least one opening (4) in each narrow side (2) of the flat tubes (1) accordingly the planned forced circulation, superimpose the flat tubes (1) with their narrow sides, the arrangement of the openings (4) is carried out according to the forced circulation of the heating medium and at the same time at least two rings equally spaced between each two adjacent tubes be inserted, Compressing the structure and performing the known pressure welding, such that a predetermined gap (3) is maintained between the tubes (1). Attach at least one U-shaped bracket (6) to the rear, being perpendicular from this punched tabs (7) are pushed into the gap (3) between the flat tubes (1), and - Weld the U-shaped bracket (6) to the back of the wall. 12. The method according to claim 11, characterized in that the openings (4) by an obliquely ground Stamp are pressed into the already closed flat tubes. 13. A method for producing a heating wall, in particular according to claims 1, 7 and 8, characterized by the following process steps: uniform cutting to length of flat tubes (1), Production of at least one bulge (11) in the narrow side of at least one flat tube (D, Making openings (4) in the narrow sides (2) of the flat tubes (1), including in the area of the bulge, according to the planned Forced circulation of the heating medium, Laying the tubes (1) on top of one another, the arrangement the openings (4) is made according to the forced circulation, - Compressing the structure and performing the pressure welding, such that a predetermined Gap (3) between two successive tubes (1) is retained, and - Attachment of at least one U-shaped bracket (6) on the back, with tabs punched out vertically from the back of the holder (6) (7) can be pushed into the column (3) and the bracket (6) is welded to the rear the wall. 14. A method for producing a heating wall, in particular according to claims 1 and 9, characterized through the following process steps: uniform cutting to length of narrow flat tubes (1), Introduction of at least two oval indentations (9) in the respective opposite narrow sides of successive flat tubes (1) in the assembly, Closing the end faces of the individual flat tubes (1), Introducing oval openings (4) in some end faces of the indentations (9), depending on the intended use Forced circulation of the heating medium, 15 Insertion of oval sleeves (10) between two opposing indentations (9) adjacent flat tubes (1), - stacking the pipes (1), Compressing the structure and performing the • known pressure welding, such that a predetermined gap (3) is maintained between two adjacent pipes (1), Attaching at least one U-shaped bracket (6) to the rear, being perpendicular from this punched tabs (7) are pushed into the gap (3) between the flat tubes (1), and Weld the U-shaped bracket (6) to the back of the wall.