EP2784408B1 - Boiler - Google Patents

Description

The invention relates to a heating boiler according to the preamble of patent claim 1.

The document EP 1 703 227 A2 discloses the preamble of claim 1.

A boiler of the type mentioned is out EP 0 970 327 B1 known. This consists of a combustion chamber, the veridendig with cover elements and formed by a helically coiled gap heat exchanger is formed. In addition, this boiler consists of a gap heat exchanger enclosing housing, which is formed from the cover elements and a jacket part, wherein the gap heat exchanger for forming an accessible from outside the housing connecting piece has a free, an outer cylinder circumference of the gap heat exchanger superior end. A more detailed explanation of how the connection piece is led out of the housing in this solution is in EP 0 970 327 B1 not specified. Out FIG. 4 This document can only assume that the shell part corresponding through holes are provided.

The invention has for its object to improve a boiler of the type mentioned. In particular, a boiler is to be created with as easy to produce through holes.

This object is achieved with a boiler of the type mentioned by the features listed in the characterizing part of patent claim 1.

According to the invention, it is thus provided that a passage opening for the connecting piece is formed on the cover element.

In other words, the solution according to the invention thus characterized by the fact that not the jacket part, but the lid member itself is provided with a passage opening for the connection piece. This proviso has the advantage that a complicated design of a through hole on the shell part can be omitted, whereas the particular cast technology training the passage opening on the lid member comparatively easy to manufacture and beyond, which will be explained in more detail below, also good seal.

Other advantageous developments of the boiler according to the invention will become apparent from the dependent claims.

For the sake of completeness is still on the boiler according to EP 1 562 006 B1 pointed. This also consists of a combustion chamber, the veridendig with cover elements and formed by a helically coiled gap heat exchanger is formed. In addition, this boiler has a gap heat exchanger enclosing housing, which is formed from the cover elements and a shell part. In contrast to the above-mentioned solution according to the invention has in this construction, which has proven well in the rest in practice, the gap heat exchanger at its two ends oriented axially oriented, welded and tubular connecting pieces, wherein formed on the cover elements to the connecting pieces form-fitting and by these sealed-through openings are provided.

The boiler according to the invention, including its advantageous developments according to the dependent claims will be explained in more detail with reference to the drawing of a preferred embodiment.

Figur 1

den erfindungsgemäßen Heizkessel (ohne Brenner);

Figur 2

den Heizkessel gemäß Figur 1 aus einer anderen Blickrichtung und ohne Mantelteil;

Figur 3

das Deckelelement mit Durchgangsöffnung für den Anschlussstutzen des Heizkessels gemäß Figur 1;

Figur 4

den Spaltwärmetauscher gemäß Figur 1 mit geradlinigem Anschlussstutzen;

Figur 5

das Mantelteil des Heizkessels gemäß Figur 1; und

Figur 6

das zwischen Deckelelement und Mantelteil zu positionierende Dichtelement.

It shows in perspective

FIG. 1

the boiler according to the invention (without burner);

FIG. 2

according to the boiler FIG. 1 from another direction and without shell part;

FIG. 3

the lid member with passage opening for the connecting piece of the boiler according to FIG. 1 ;

FIG. 4

the gap heat exchanger according to FIG. 1 with rectilinear connection piece;

FIG. 5

the shell part of the boiler according to FIG. 1 ; and

FIG. 6

the sealing element to be positioned between the cover element and the jacket part.

The in the figures, in particular FIG. 1 , The illustrated boiler consists of a combustion chamber 1, which at both ends with lid elements 2 ver and (at least partially) is formed by a helically coiled gap heat exchanger 3 is formed. Furthermore, the boiler consists of a gap heat exchanger 3 enclosing housing, which is formed from the cover elements 2 and a shell part 4, wherein the gap heat exchanger 3 for forming an accessible from outside the housing connecting piece 5 has a free, an outer cylinder circumference of the gap heat exchanger 3 superior end ,

With regard to the cover elements 2, it is preferably provided that these are formed by casting technology, in particular as an aluminum die casting. Furthermore, it is provided (not shown separately) that a burner for liquid or gaseous fuels is arranged on one of the cover elements 2 (in this way the combustion chamber is closed towards the outside, for example a thermal insulation block or the like on the cover element 2) provided for completion of the combustion chamber 1). How out FIG. 1 and 3 it can be seen, while the lid member 2 is annular and about the same extent in the radial extent as the gap heat exchanger 3 is formed. The gap heat exchanger 3 has in a conventional manner a (substantially) rectangular flow area, with short sides of the rectangle forming its inner and outer peripheral surface.

Furthermore, it is provided that the preferably circular on the outer circumference cover element 2 is formed inserted in a conventional manner in the shell part 4. After insertion, the edge of the preferably cylindrical shell part 4, as particularly good FIG. 1 visible, flanged for fixing the lid member 2. It is further provided that the housing is formed the gap heat exchanger 3 to form an exhaust chamber 12 enclosing. In addition, in particular with reference to FIG. 5 on the shell part 4, an exhaust port 15 and a condensate drain 16 is provided.

Essential for the boiler according to the invention is now that the cover element 2, a through hole 6 is formed for the connecting piece 5.

It is how particular out FIG. 2 and 3 can be seen, the cover element 2 in the region of the passage opening 6 in the axial direction of the gap heat exchanger 3 seen thicker than the connecting piece 5 is formed. In addition, the passage opening 6 is up to a the shell part 4 facing the outer periphery of the lid member 2 is formed reaching, the outer periphery (with reference to FIG. 2 and 3 ) is formed as an outer peripheral surface 11.

Furthermore, with reference to FIG. 3 on the cover element 2 a form fit to the connecting piece 5 suitably trained arrangement area 7 (for the connection piece 5) provided, wherein also (see in particular FIG. 4 ) of the connecting piece 5 is particularly preferably formed as a straight, also having a substantially rectangular flow cross section exhibiting pipe section.

To realize the passage of the connection piece 5 through the housing wall of the boiler is further particularly preferably on the shell part 4 in the region of the passage opening 6, a preferably approximately rectangular recess 8 is provided. This recess 8 on the shell part 4 in this case has a circumferential width (length), which corresponds to a circumferential width (length) of the through hole 6. In addition, the recess 8 is open to the edge of the shell part 4, ie the cover element 2 can be inserted together with the gap heat exchanger 3 in the shell part 4. The depth or width of the recess 8 is selected so that it corresponds to the thickness of the gap heat exchanger 3 plus the outer wall thickness of the cover element 2 in the region of the through hole 6.

Another special feature of the boiler according to the invention is that between the cover member 2 and the shell part 4, in particular for sealing the exhaust chamber 12 relative to an environment of the housing, a sealing element 9 is arranged. This sealing element 9 is preferably made of an elastic material, in particular rubber. In addition, with reference to the FIGS. 1 to 3 on the cover element 2 on the shell side a groove 10 for receiving the sealing element 9 is provided.

On the one hand, the sealing element 9 comprises an annular annular seal part 9.1 which fits the groove 10. On the other hand, the sealing element 9 also comprises a surface sealing part 9.2 which fits the outer circumference of the cover element 2. This is how the comparison between FIG. 1 and 6 shows, larger than the recess 8 formed on the shell part 4. In addition, it is provided that the surface sealing part 9.2 has a the connecting piece 5 accurately enclosing sealing passage 9.3.

Again with reference to FIG. 1 Finally, it is particularly preferably provided that a Heizkreisanschlussstück 13 is plugged onto the connecting piece 5, wherein this connection piece side has an elastically deformable spout portion 14.

LIST OF REFERENCE NUMBERS

1

combustion chamber

2

cover element

3

Gap heat exchanger

4

jacket part

5

spigot

6

Through opening

7

arrangement region

8th

recess

9

sealing element

9.1

Ring seal member

9.2

Surface sealing member

9.3

Seal passage

10

groove

11

Outer circumferential surface

12

exhaust chamber

13

Heizkreisanschlussstück

14

spout area

15

exhaust port

16

condensate drain

Claims (10)

1. Heating boiler comprising a combustion chamber (1) which is configured to be closed at both ends by cover elements (2) and enclosed by a helically coiled gap heat exchanger (3), and a housing enclosing the gap heat exchanger (3), which is formed from the cover elements (2) and a casing part (4), wherein the gap heat exchanger (3) has one free end projecting beyond an outer cylinder circumference of the gap heat exchanger (3) to form a connecting piece (5) accessible from outside the housing, wherein at least one through-opening (6) for the connecting piece (5) is formed on at least one cover element (2),
   characterized in
   that a recess (8) is provided on the casing part (4) in the region of the through-opening (6).
2. The heating boiler according to claim 1,
   characterized in
   that the connecting piece (5) is configured as a rectilinear tube piece.
3. The heating boiler according to claim 1 or 2,
   characterized in
   that an arrangement region (7) configured to fit positively to the connecting piece (5) is provided on the cover element (2).
4. The heating boiler according to any one of claims 1 to 3,
   characterized in
   that the through-opening (6) is configured to extend as far as an outer circumference of the cover element (2) facing the casing part (4).
5. The heating boiler according to any one of claims 1 to 4,
   characterized in
   that a recess (8) is provided on the casing part (4) in the region of the through-opening (6).
6. The heating boiler according to any one of claims 1 to 5,
   characterized in
   that a sealing element (9) is disposed between the cover element (2) and the casing part (4).
7. The heating boiler according to claim 6,
   characterized in
   that a groove (10) for receiving the sealing element (9) is provided on the cover element (2) on the casing side.
8. The heating boiler according to claim 7,
   characterized in
   that the sealing element (9) comprises an annular ring sealing part (9.1) which fits the groove (10).
9. The heating boiler according to any one of claims 6 to 8,
   characterized in
   that the sealing element (9) comprises a surface sealing part (9.2) which fits the outer circumfernece of the cover element (2),
10. The heating boiler according to claim 9,
    characterized in
    that the surface sealing part (9.2) is configured to be larger than the recess (8) on the casing part (4).

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