EP0462296A1 - Gas heated water storage heater and/or continuous-flow heater with a closed combustion chamber - Google Patents

Abstract

The invention relates to a gas-heated water storage heater and/or continuous-flow heater (heating geyser) with a closed combustion chamber without internal casing with a burner, a pilot burner and a thermoelectric pilot-flame safety device, which are accommodated inside the closed combustion chamber. The invention can be characterised in that the closed combustion chamber has a rear wall (1), a front panel (8) which with side sheets (9) forms a structural component which produces a front casing (7), a front blocking sheet (6) fastened rigidly to the rear wall, and, connected to the front blocking sheet (6), a second blocking sheet (10) fastened rigidly in the front casing (7); the front casing (7) is fastened separably to the rear wall; between the side sheets (3) of the rear wall (1) and the front blocking sheet (6) and between the supported surface parts of the side sheets (3) of the front casing (7) and of the second blocking sheet (10) on the front casing (7), a seal (16) made of elastic plastic foam strip is arranged; the bores (23, 22, 19) for guiding the pipes of the gas fitting (27), of the pilot burner and of the thermoelectric pilot-flame safety device through into the closed combustion chamber are situated in the front blocking sheet (6) fastened rigidly to the rear wall (1).

Description

The invention relates to a gas-heated water boiler and / or instantaneous water heater with a closed combustion chamber without an internal jacket, with a burner, pilot burner and thermoelectric pilot light fuse accommodated within the closed combustion chamber.

The known gas-heated water boilers and / or instantaneous water heaters with a closed combustion chamber have a box inside the internal jacket with a detachably arranged lid, which contains the closed combustion chamber. This box is made of steel. Between the folded edges of the welded side panels and the box to be fastened by means of screws, an elastic sealing material, e.g. B. an asbestos cord, glass wool, or the like.

In some of the known devices, a lead-through component with thread, which is screwed onto the gas fitting in a gas-tight manner (wound), the thread of which corresponds to that of the threaded end of the gas fitting, is used to seal the passage of the gas fitting. A sealing ring can be attached to the component to close the closed combustion chamber with a screw nut. The burner can also be screwed onto it in a gas-tight manner.

A disadvantage of these known water boilers and / or instantaneous water heaters (heating geiser) with a closed combustion chamber is that they have a relatively large amount of material and relatively high material because of the separate box inside the internal jacket Require effort and time. The weight of the separate box used to manufacture the closed combustion chamber significantly increases the weight of the entire gas-heated water boiler or instantaneous water heater. Another disadvantage is that the seal cannot be made permanently and is easily and therefore often damaged during assembly. Complex assembly work is required to replace the damaged and therefore defective seal, which greatly increases the maintenance effort.

The object of the invention is to remedy the disadvantages of the prior art and in particular to provide a gas-heated water boiler and / or instantaneous water heater with a closed combustion chamber, the structural design of which dispenses with the previous separate steel case for producing the closed combustion chamber, a substantial reduction in weight , the material requirements and the workload of the entire water boiler or water heater device, and where any intervention in the interior of the closed combustion chamber is practically possible without disassembly after a few steps and finally the seal on the side plates is designed so that it during the assembly cannot be damaged, always has the appropriate quality and, furthermore, the already assembled seal is practically automatically brought into the desired position in the course of the dismantling and assembly activities for the closed combustion chamber, d. H. the seal poses no problems when opening or closing the closed combustion chamber.

This object is achieved by a water boiler or a water heater (heating geiser) with the features specified in claim 1. Advantageous configurations are defined by the features in the subclaims.

An inventive gas-heated water boiler and instantaneous water heater (heating geiser) with a closed combustion chamber, which has a burner accommodated within the closed combustion chamber, a pilot burner and a thermoelectric pilot light fuse, can be characterized in that the closed combustion chamber consists of a rear wall, a front plate, the forms an assembly with side plates, which results in a front jacket, a front locking plate rigidly attached to the rear wall and a second locking plate rigidly attached in the front jacket, which is connected to the front locking plate, the front jacket being separably attached to the rear wall and between the Side plates of the rear wall and the front locking plate and between the surface parts of the side plates of the front jacket and the second locking plate on the front jacket, a seal made of elastic plastic foam tape is arranged, and that the holes for D Passage of the pipes of the gas valve of the pilot burner and the thermoelectric pilot light fuse in the closed combustion chamber are located in the front locking plate rigidly attached to the rear wall.

Another feature of the water boiler or instantaneous water heater according to the invention is that the structural parts fastening the front jacket to the rear wall are attached to the surface of the side plates of the front jacket, which have cut-out eyelets that are cut out from them and bent downwards on a part of the hanging plates protruding from the side plates , wherein slots are formed in the upper side plates of the rear wall for receiving the hanging eyes and a pressure nut is provided, which can be screwed to a housing of a water fitting via a hole in the front plate of the front casing.

In one of the solutions are on the side panels of the rear wall and on the two locking plates and the side panels of the Front flanges parallel flanges are provided to support and hold a band-shaped elastic seal.

In another solution, a flange formed by an envelope is provided on the side plates of the rear wall for two-sided covering of the seal and this opposite straight flanges formed on the side plates of the front jacket for unilaterally covering the seal.

In a further possible solution, there are straight flanges on the side plates of the rear wall for covering the seal on one side and opposite them a flange formed on the side plates of the front casing and channel-shaped by a double right-angle envelope on three sides for covering the plastic seal, in particular plastic seal intended.

According to a further feature, an elastic, flat seal is pressed against the locking plate by a pressure plate around a bore, which is used to carry out a tube of the thermoelectric pilot light fuse, wherein there are gaps in bores around the gas fitting and the ignition burner tube.

In a further advantageous embodiment, a common, flat, elastic pressure plate is provided in one part for sealing the bores for the passage of the tube of the thermoelectric pilot light fuse, the gas fitting and, if appropriate, further tubes, which is pressed onto the locking plate by means of a pressure frame.

Finally, the invention can also be characterized in that the upper shoulder of the nozzle holder tube at the upper end of the gas fitting for holding the pilot burner tube touches the lower surface of the locking plate or is in its immediate vicinity.

The gas-heated water boiler and instantaneous water heater according to the invention with a closed combustion chamber without an internal jacket has the following main advantages:
The separate box previously used to form the closed combustion chamber can be dispensed with, as a result the amount of material and working time required for production are significantly reduced; The weight of the water boiler or instantaneous water heater (heating geiser) is also reduced by 4 to 5 kg. The assembly or disassembly can be carried out in a few simple steps, which is why the working time required for checking, adjusting and replacing components is shorter. The seal can not be damaged, the seal once used can be left unchanged for a very long time. The construction is simple, not susceptible to faults and can be produced inexpensively.

Fig. 1

die Ansicht der Rückwand eines Ausführungsbeispieles des erfindungsgemäßen gasgeheizten Wasserboilers oder Durchlauferhitzers;

Fig. 2

einen schematischen Schnitt nach der Linie II-II von Fig. 1;

Fig. 3

einen schematischen Schnitt nach der Linie III-III von Fig. 1;

Fig. 4

im vergrößerten Maßstab eine Schnittdarstellung eines Teiles des Konstruktionsteiles, der links in Fig. 3 mit einem Kreis markiert ist;

Fig. 5

eine Fig. 4 entsprechende Darstellung einer zweiten möglichen Ausführungsform dieses Konstruktionsteiles;

Fig. 6

eine andere mögliche Lösung des Konstruktionsteiles von Fig. 4 und 5;

Fig. 7

im vergrößerten Maßstab eine Schnittdarstellung eines Teils des Konstruktionsteiles, der oben in Fig. 2 mit einem Kreis markiert ist;

Fig. 8

im vergrößerten Maßstab eine Schnittdarstellung eines Teils des Konstruktionsteiles, der rechts unten in Fig. 2 mit einem Kreis markiert ist; und

Fig. 9

im vergrößerten Maßstab eine schematische Schnittdarstellung eines Teils des Konstruktionsteiles, der in der Mitte von Fig. 1 mit einem Kreis markiert ist.

The gas-heated water boiler and instantaneous water heater according to the invention with a closed combustion chamber is explained in more detail by means of exemplary embodiments with reference to the accompanying drawings. Further essential features and advantages of the present invention are disclosed. Show it:

Fig. 1

the view of the rear wall of an embodiment of the gas-heated water boiler or water heater according to the invention;

Fig. 2

a schematic section along the line II-II of Fig. 1;

Fig. 3

a schematic section along the line III-III of Fig. 1;

Fig. 4

on an enlarged scale, a sectional view of a part of the structural part, which is marked with a circle on the left in FIG. 3;

Fig. 5

a representation corresponding to FIG. 4 of a second possible embodiment of this structural part;

Fig. 6

another possible solution of the structural part of Figures 4 and 5;

Fig. 7

on an enlarged scale, a sectional view of part of the structural part, which is marked with a circle at the top in FIG. 2;

Fig. 8

on an enlarged scale, a sectional view of part of the structural part, which is marked with a circle at the bottom right in FIG. 2; and

Fig. 9

on an enlarged scale, a schematic sectional view of a part of the construction part, which is marked with a circle in the middle of FIG. 1.

A rear wall 1 shown in FIG. 1 in a front view is made from sheet metal material. A recess 2 is used to carry out the wall duct, not shown, for supplying the combustion air and the duct part for the discharge of the combustion products. The sheet material of the rear wall 1 is folded over vertically on both sides and above, and the folded parts are fastened to one another at their corners to form side sheets 3. The outer parts of the side panels 3 are folded inwards parallel to the plane of the rear wall 1, and these parts form flanges 4. At the lower part of the rear wall 1, a recess of a larger size is provided for the passage of pipelines, not shown, the edges of the recess being turned up on all three sides are. These folded parts form a flange 5, the purpose of which is to prevent damage to the rear wall during assembly.

A lower locking plate 6 is fastened to the rear wall 1, approximately between the lower and the middle third, perpendicular to the rear wall, advantageously by welding. The locking plate 6, as shown in Fig. 3, has a wedge shape and has on its edges flanges, the size of which corresponds to that of the flanges 4.

The rear wall 1 can be covered with a front jacket 7, which essentially consists of a front plate 8, side plates 9 connected to the two vertical edges and a second locking plate 10 fastened inside, advantageously by welding. On the edges of the front casing 7 connected to the rear wall 1 there are flanges 4 which have the same dimensions as those on the edges of the rear wall 1 and the locking plate 6. These flanges 4 lie opposite one another in the completed state of the water boiler and run parallel. In the lower part of the front casing 7, the recess is continued at the lower part of the rear wall 1. A flange 5 is also arranged around this part of the recess.

The connection between the rear wall 1 and the front jacket 7 is designed such that the front jacket 7 can be removed and removed in a few simple steps from the rear wall 1 attached to a house wall or the like. The connection is in 2 and 7. In the manner illustrated in FIG. 7, the upper side plates 3 of the rear wall 1 are each attached to the two side plates 9 via a hanging plate 11, for example by welding, a hanging eye 12 being cut out of the part protruding beyond the side plate 3 is bent downwards at an angle of close to 90 °. At the upper edges of the rear wall 1, slots 13 are formed in each of the side plates, in which the suspension eyes 12 can be hung. The hanging eyes 12 and the slot 13 are designed so that in the complete state the hanging eye 12 covers the slot 13 practically gas-tight. The front jacket 7 suspended on the rear wall 1 by means of the two suspension eyes can be fixed in its position by the pressure nuts 14 shown in FIGS. 2 and 8, which protrude through a hole in the front plate 8 and with their threaded ends, for example a housing of a temperature selector of a water valve in the room can be screwed under the locking plates 6 and 10.

In the area above the front plate 8 and the locking plates 6 and 10 there is a surveillance gap 15 covered with heat-resistant glass in a conventional design, the glass of which is fixed, insulated and protected in a conventional manner.

On the flanges 4 of the rear wall 1, the front shell 7 and the locking plates 6, 10, which run opposite and parallel to each other, either on the flanges 4 of the rear wall 1 or those of the front shell 7, band-shaped seals 16 based on plastic foam, for example by Glue, attached. The same applies to the flanges 4 of the locking plates 6, 10. The seal 16 is elastic and, when clamped between the flanges 4, closes the gaps between the rear wall 1 and the front jacket 7 in an airtight manner.

The seal 16 can be clamped in different ways between the parallel flanges 4, i. H. the clamping flanges 4 can be designed in different ways. For example, in the embodiment according to FIG. 4, the flanges 4 of the first locking plate 6 and the second locking plate 10 clamp the seal 16 in such a way that the outer and the inner side of the seal 16 are not covered. The outer side of the seal 16 is visible from the outside, it can become dirty and show an aesthetically unfavorable appearance. To avoid this, the design according to FIG. 5 can be advantageous, for example, in which the flange 4 belonging to the first locking plate 6 connects to the side plate 3 via an overlap 17 and thus almost completely covers the outer surface of the seal 16. In the exemplary embodiment according to FIG. 6, in addition to the overlap 17 on the flange 4, which belongs to the second locking plate 10, there are also two vertical envelopes in order to obtain a channel-shaped design, i. H. the seal 16 is almost completely enclosed on three sides.

Under the first locking plate 6 and the second locking plate 10, which are fastened to the rear wall 1 and to the front jacket 7 perpendicular to their main plane by welding, there are the fittings for supplying the burner, the pilot burner and the thermoelectric pilot light fuse and the fittings for the Provision and promotion of water. These fittings and the pipes between the associated burner or pilot burner and the thermoelectric pilot light fuse and the heat exchanger protrude through the holes in the first locking plate 6 (Fig. 3). One of the holes 18 is for supplying the water to the heat exchanger, the other for removing it. The tubes are fastened in the bores 18 in the usual manner with a flat nut or with a union nut. Hole 19 is provided to carry out the tube of the thermoelectric pilot light fuse and can be sealed with a rubber plate pressed onto the locking plate 6. In the rubber plate, the diameter of the bore provided for the tube is smaller than the outside diameter of the tube. The pressure plate 20 is firmly attached to the locking plate 6 by screws 21. The tube of the pilot burner reaches the pilot burner via the bore 22, while the gas fitting projects beyond the bore 23. In the case of a possible solution, the diameter of the bores 22 and 23 can be approximately 0.3-0.4 mm larger than the diameter of the pipe passed through. Less air flows through this column than the guidelines permit at the pressure for closed combustion chambers prescribed for the density test.

With regard to the operation of the water boiler, it is very important that the upper shoulder of the nozzle holder 25 rests at the upper end of the nozzle holder tube 24 belonging to the pilot burner on the lower surface of the locking plate 6 or is at a distance of approximately 0.1 mm therefrom (FIG. 9) . The upper part of the nozzle holder for holding the pilot burner tube 26 protrudes through the hole in the locking plate 6. There is also the possibility of sealing the bore 19 in the locking plate 6 (FIG. 3) as well as the bore 22 belonging to the ignition holder tube 26 and the bore 23 belonging to the gas fitting 27 (FIG. 3) with a single common sealing plate 28, the sealing plate 28 is pressed with the pressure frame 29 by means of screws to the locking plate 6.

The gas-heated water boiler and instantaneous water heater according to the invention with a closed combustion chamber without an internal jacket has the most important advantages listed below: The separate box previously used to form the closed combustion chamber can be dispensed with, as a result of which the amount of material required for production is eliminated and working time significantly reduced: The weight of the water boiler or instantaneous water heater (heating geiser) is also reduced by 4 to 5 kg. The assembly or disassembly can be carried out in a few simple steps, which is why the working time required for checking, adjusting and replacing components is shorter. The seal can not be damaged, the seal once used can be left unchanged for a very long time. The construction is simple, not susceptible to faults and can be produced inexpensively.

Reference symbol list

1

Back wall

2nd

gap

3rd

gap

4th

flange

5

flange

6

Pawl

7

Front coat

8th

Front panel

9

Page sheet

10th

Pawl

11

Hanging sheet

12

Hanging eyelet

13

gap

14

Pressure nut

15

Monitoring gap

16

poetry

17th

envelope

18th

drilling

19th

drilling

20th

printing plate

21

Screw

22

Drilling

23

drilling

24th

Nozzle holder tube

25th

Nozzle holder

26

Pilot burner tube

27th

Gas valve

28

Sealing plate

29

Print frame

Claims (8)

Gas-heated water boiler and / or instantaneous water heater with a closed combustion chamber, with a burner accommodated within the closed combustion chamber, a pilot burner and a thermoelectric pilot light fuse, characterized in that the closed combustion chamber has a rear wall (1), a front plate (8), which with Side plates (9) forms an assembly which results in a front jacket (7), a front locking plate (6) rigidly attached to the rear wall and a second locking plate (10) rigidly attached in the front jacket (7), which to the front locking plate (6) is connected that the front jacket (10) is releasably attached to the rear wall, that between the side plates (3) of the rear wall (1) and the front locking plate (6) and between the surface parts of the side plates (3) of the front jacket (7) and the second locking plate (10) on the front jacket (7) a seal (16) made of elastic plastic foam tape or plastic tape net, and that the bores (23, 22, 19) for carrying out the pipes of the gas fitting (27), the pilot burner and the thermoelectric pilot light fuse in the closed combustion chamber are in the front locking plate (6) rigidly attached to the rear wall (1) ) are located. Water boiler and / or instantaneous water heater according to claim 1, characterized in that the structural parts securing the front jacket (7) to the rear wall (1) are hanging sheets (11) attached to the surface of the side plates (3) of the front jacket (7) Part of the hanging plates (11) protruding beyond the side plates (3) and cut out and bent down hanging eyes (12) that slots (13) in the upper side plates (3) of the rear wall (1) for receiving the hanging eyes (12) are formed, and that a pressure nut (14) is provided which can be screwed to a housing of a water fitting via a hole in the front plate (8) of the front casing (7). Water boiler and / or instantaneous water heater according to claim 1 or 2, characterized in that on the side plates (3) of the rear wall (1) and on the two locking plates (6, 10) and the side plates (3) of the front casing (7) parallel flanges ( 4) are provided for supporting and holding a band-shaped elastic seal (16). Water boiler and / or instantaneous water heater according to claim 1 or 2, characterized in that on the side plates (3) of the rear wall (1) a flange (4) formed with a protrusion (17) for covering the seal (16) on two sides and opposite it the side plates (9) of the front casing (7) formed straight flanges (4) for one-sided covering of the seal (16) are provided. Water boiler and / or instantaneous water heater according to claim 1 or 2, characterized in that on the side plates (3) of the rear wall (1) straight flanges (4) for unilaterally covering the seal (16) and opposite one on the side plates (9) of the Fore jacket (7) formed, by means of a double right-angle flap, channel-shaped flange (4) for covering the plastic (16) or plastic seal are provided on three sides. Water boiler and / or instantaneous water heater according to one of Claims 1 to 5, characterized in that an elastic, flat seal on the locking plate is provided by a pressure plate (20) around a bore (19) which is used to feed a tube for the thermoelectric pilot light fuse (6) is pressed, and that there are gaps in bores (22, 23) around a gas valve and a pilot burner tube. Water boiler and / or instantaneous water heater according to one of claims 1 to 5, characterized in that a common, flat elastic pressure plate in one part for sealing the bores (19, 22, 23) for carrying out a tube for the thermoelectric pilot light fuse, a gas valve and a tube is provided which is pressed onto the locking plate (6) by means of a pressure frame (29). Water boiler and / or instantaneous water heater according to one of claims 1, 2, 6 or 7, characterized in that the upper shoulder of the nozzle holder tube at the upper end of the gas fitting for holding the pilot burner tube touches the lower surface of the locking plate or is in its immediate vicinity Is located nearby.

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