DE1912629A1 - Combustion chamber for water heater - Google Patents

Description

DIPI ^ -ING-H. MAKSCH 4 Düsseldorf,

PATENT Attorney IINDEMiSNSTHASSB 31

TELEPHONE 67 22 48

Description of the patent application

of RADIATION LIMITED, Radiation House, North Circular Road,

London N.W. 10, England,

concerning:
"Combustion chamber for water heater '·

The invention relates to a combustion chamber for water heaters and in particular to gas or oil-heated ones Water heaters for use as circulation devices, hot water storage tanks for central heating systems and as so-called "instant water heaters" or instant water heaters.

The invention is based on the object of significantly simplifying the manufacture and assembly of the combustion chambers for such gas or oil-heated hot water devices while at the same time improving the heat transfer from the heating gases to the water to be heated

A combustion chamber for water heaters is characterized according to the invention by the assembly of at least two basic combustion chamber components, of which at least one is made of cast metal and at least one is embedded in it

Has water pipe. A water heater with a combustion chamber according to the invention comprises at least one cast Basic component that contains a serpentine pipe through which the water to be heated flows.

The cast combustor component may have a number of heat transfer fins integrally formed therewith that can be cast around at least a portion of at least each water pipe.

The combustion chamber can have such a combustion chamber component ψ with a side wall and two end walls, the serpentine tube being arranged in the side wall on which the ribs are also located. A fourth wall extends between the end walls and completes the structure of the combustion chamber. No pipes are arranged in this wall, and this wall is also not provided with heat transfer fins.

The combustion chamber can comprise only two such combustion chamber components, each of which has a side wall and end walls, the serpentine tube being disposed in the side wall on which the Heat transfer fins are located. The serpentine pipe can have several straight, parallel pipe sections at least some of the heat transfer fins are common to these parallel pipe sections and mii: their longitudinal axes are at right angles to the axes of the parallel pipe sections. Pockets or openings may be formed in the combustion chamber component between adjacent parallel pipe sections.

The heat transfer fins can have a shorter length than the basic components, creating a more unripped

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Part of the latter remains, and they can be arranged on a part of the basic component that is opposite to the unripped Part is inclined that with assembled basic components a tapered or tapered portion is formed between the inclined parts.

In another embodiment, two basic components form the combustion chamber, each part of which is a side wall and has end walls, the serpentine tube disposed on the outside of the walls and the heat transfer fins are on the inside of the side wall.

The second embodiment may also include a heat exchanger in which a series of heat transfer fins are cast around a tube through which to heating water flows through it.

In a third embodiment of the invention, the basic component with the heat transfer fins and the embedded Pipe a wall of the combustion chamber. The ribs can protrude from one side of the wall while the pipe is on the other side lies.

Embodiments of the subject matter of the invention are shown in the drawing. Show in the drawing

Fig. 1 is a front view of a first embodiment,

FIG. 2 shows a section through this embodiment according to section line II-II in FIG. 1,

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Pig. 3 and 4 a rear view and a plan view of a sub-unit of the first embodiment,

Figures 5 and 6 show a corresponding front view and a plan view of another sub-unit of the first Embodiment,

Pig. 7 is a front view, partly in section, of a second embodiment,

Fig. 8 is a side view of the other embodiment,

9 shows a plan view of a sub-unit of the second embodiment,

FIG. 10 shows a section along line X-X from FIG. 9, FIG. 11 shows a side view of the sub-unit from FIG. 9,

12 shows a plan view of another sub-unit the second embodiment,

FIG. 13 shows a section along line XIII-XIII from FIG. 12 and '

14 is a partially cut-away perspective View of a third embodiment.

The first embodiment to be described with reference to FIGS. 1 to 6 comprises a circulating device for forced water flow, primarily for use in the home, but which can also be used in other areas. '''■■ - ■ - ■■

9 0 9 8 4 1/1

That. The circulation device is a two-part construction with a left part 1 and a right part 2 (Fig. 2). Each part contains a serpentine, water-bearing water Copper pipe 3 around which an aluminum body 4 is cast. The tube 3 has an inlet 5 and an outlet 6 leading from the body 4 protrude, but the tube is otherwise in the Body 4 covered.

Each body or component 4 has a lower edge part 7 and an upper part 8,. which contains the tube 3 and which is at a slight angle too. part 7, upward

«Extends. Each body or component 4 has end walls 9, which, as at 10, from a surface side of the part protrude, and a plurality of parallel ribs 11, the protrude from the opposite surface side of the part 8. The ribs have an im. essentially equal- ' remaining depth over the greater part of their length, but are beveled at point 12. As shown in FIG. 3, there are deep pockets 13 in the component or body 4 between parallel sections 14. of the pipe 3 available, the ribs 11 extending over the depressions, as can be seen in FIG. However, there are none on the pipe bends 14a at the ends of the parallel sections 14 Depressions available. The end walls 9 have outwardly directed projections 15 with holes 16.

The components or bodies -4 are screwed together with mutual contact of the end surfaces 17 of the Ehdwändungen 9 by bolts 18, which are guided through the holes or openings 16 in the projections 15. It is therefore a burner. trained, with; one: broad lower area 19 and one upper area 20, which increases with increasing. _L. · ■ , -. Distance from ä & ta area 19 converges somewhat. ·; ·. :. ■ - ■ ·.: ■ · - . ·>. ■■■ ·.

.Under the area 19 1st, a gas burner arrangement 21 mounted with a burner tube 22 - which is fastened between end plates, one of which is screwed to a fastening plate 24 which in turn is attached to the base component 2 by screws 25 is. ■ ·. · * ^R ■,

The sections of the pipe 3 · in the two components

are parallel on the upper sides 6 and ^ on the lower sides 5

connected to one another by pipe connectors 2'6 ·, 26a, - ·>

in Fig. 1 and ^: · shown in more detail in Figs

are. ■ - · -: ■■ ...: ■ .- ■ ". ■: ■ -. ■ -.- '■ -

The pipe connector 26 'is a pressed brass part with an outlet 30 which is connected to the inlets 27 and 28 by an inner passage channel 29. The inlets and the outlets are equipped with screw threads, like indicated in Fig * 6. In addition, there is another access ■■; put to the passage 29 via the Sehraübgewindeöffnuhg 31 provided.

The pipe connection piece 26a is designed similarly to the pipe connection piece 26, but in this case the passage 29 connects the inlet 30 "with outlets 27 ^; and 28. In addition, the lateral spacing of the outlets' ^: ' ^: 27, 28 is greater than that' of the inlets 27 ^} , 28 - in the ^; RohrverMndurigsstück 2 &. '"■ '"'-' · ■ - ■ ^! ■ "

The ends 5 and 6 of the tubes' 3 are widened, 'after ^: Abdich'ttingsr ± nge -' 32 and selbs € verriegeiHmfe ''; The nuts 33 were pushed over the pipe ends. """'"^;

To connect de ^! r '' Bin-1 fs se 5 are '' those on wide-: th ends ^? && t -Elnl-e "^ in 'die"Aüs'lasse ^r 27,' ^J 28 'des Röharveir- ■■

inserted, and 'ä'ärvn' - 'will ^ ii the' Sicnet- ^ '"

security nuts 33 tightened while the rings 32 are pressed together « The outlets: 6 are connected to the pipe connector 26 in the same way: and then the pipe connectors connected to the inlet and return lines 35, 34, as shown.

The UmIaufgerät works in the known manner. The ribs 11 extract heat from the hot combustion products rising from the burner arrangement 21 and in this way heats the water ¹ flowing through the tubes 3. If necessary, a vent, not shown, is attached to the top of the area 20 to remove the products of combustion. The trigger will contain the usual PalIstrom deflection device, also not shown.

The pockets 13 assist the heat transfer to the water in the tubes 3 by creating extra Surfaces through which heat transfer can take place.

The circulation device is produced in that first the tubes are brought into the Sbhlangenform of the tubes 3 and then be inserted into a mold or tool into which molten aluminum is fed. When the melted Metal has solidified sufficiently, the mold or tool is opened and the component produced is taken out. After removing burrs and other surface defects, the components are put together, as described above. A gas burner assembly 21 is attached and the pipe fittings 26, 26a become attached in place.

It is understood that the body or basic components 1, 2 can be produced in different sizes, or that alternatively different circulating devices of the same size you

90

Have connected the water-carrying pipe 3 in series or in parallel can to create greater capacity.

It goes without saying that the usual accessories, e.g. thermostats, safety control and ignition safety devices, Control valves, can be incorporated as required or desired.

The second embodiment is a water heater or water heater, a so-called instantaneous water heater * and has a combustion chamber 36 above which a heat exchanger 37 P is mounted.

The combustion chamber is of two-part design, the components being identical in shape and each one serpentine, water-conducting tube 38 comprises, around which a in plan view, as in Fig. 9, U-shaped aluminum. body 39 is poured around. As can be seen from FIG. 10, the> Tube 38 on the outside or outer surface of the body or component 39 and is made entirely of aluminum encased, except for short lengths 40 at both ends. The inside of the body or component 39 has a Series of parallel ribs 41 over the part forming the base of the "U". The ribs run parallel to the. Along- * axis of the body or component and do not extend over its entire length, so that a non-ribbed part 42 remains. The upper and lower edges of the structure 39 are flat, with the upper edge having an integral, has protruding edge portion 43 which cuts off with the upper edge and from which one end 40 of the tube 38 protrudes. The protruding edge part has threaded holes 44. One vertical leg of the U - the left U-leg in Fig. 9 - is in its lower part 45 slightly extended beyond the other leg. From the lower end

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• the part 45 protrudes a projection provided with an internal thread 46 emerges. The other vertical leg of the U is cut away at point 47 and has one openwork Protrusion 48 at a short distance from the cutout. The component also has an openwork integral therewith Connecting projection 49 which is arranged as indicated in FIGS. 7, 8 and 9.

The one shown in more detail in Figs Heat exchanger 37 comprises a copper tube 50 of coiled shape with a series of parallel heat transfer fins or fins fins 51 of aluminum cast around the straight sections 52 of the tube. The straight sections 52 are connected to one another by semicircular elbows 53, the outer ends of which are slightly above the outer limits of the aluminum casting protrude. The ends 54 of the tube 55 also protrude from the casting. The casting has a continuous outer wall 55 with rounded corners 56 and with recesses in the vicinity of the Pipe ends 51.

The sub-units described so far are assembled by first adding two body or base components 39 are put together with the ends of the U-legs in mutual contact, whereupon the components are screwed together by bolts 57, which by the Projections or lugs 48 and 49 passed through a component and into the threaded projection 46 or into the Threaded opening 58 screwed into the other component will.

The heat exchanger 37 is then placed on the upper end of the combustion chamber and through connecting pieces 59 attached, which the ends 40 of the tubes 38 in the protruding

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connect jumping edges 43 to the ends 54 of the tube 50. The connectors are brass pressed pieces with two legs, one of which 60 fits into the tube 50, leaks being avoided by one in one Sealing ring 61 inserted in the wall of the pipe 50 in the groove 62. The connecting pieces have lugs or ears 63 and are attached to the protruding edges 43 by bolts 64 which pass through holes in the lugs or ears 63 are screwed through into the holes 44 in the projecting edges 43. That end 40 of the tube 38, which protrudes somewhat from the protruding edge 43 is received in the other leg of the connector and is sealed by a sealing ring, not shown.

A gas burner arrangement, not shown, is assembled in the usual manner below the combustion chamber with a water flow control section through which the connection is made from a cold water inlet pipe and a hot water outlet pipe to the adjacent projecting ends 40 of the pipes 38.

The body or base components 39 are manufactured in a manner similar to the parts 1, 2 described above. The serpentine tubes 38 are inserted into suitable molds into which molten aluminum is then inserted is poured.

The heat exchanger is made by a similar process

The combustion chamber and the heat exchanger can come in a variety of sizes for water heaters with different Thermal outputs are produced.

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The water heater works in a known manner, with the combustion products from the gas burner doing this the tubes 38 in the base component 39 heat flowing water, which is supported by the ribs 41. The products of combustion flow upwards between the components 39 and between the fins 51 of the heat exchanger 37, where further heat is withdrawn. Finally, the products of combustion enter a chimney with a not shown PalIstrom deflector and then arrive into the atmosphere.

The embodiment shown in FIG. 14 also has a combustion chamber of two-part construction. the Both parts 65, 66 have projections or lugs 67 which are formed integrally with them and which are connected to one another by bolts 68 are firmly connected.

The parts of the combustion chamber are mirror images of each other and each have a serpentine shape Coiled, water-carrying pipe 69 around which an aluminum body 70 is cast. As can be seen from Fig. 14, each body 70 has a wall 71, on one side of which the tube 69 is located, while on the other side a series of parallel ribs 72 extend as one piece with the body but extend from the top of the body extend only about half the height of the wall 71 downwards. Each body has end walls 73 that go over the full height of the body.

Thus, when the basic components 65, 66 are put together as shown in Fig. 14, a kind of box is formed, the upper part of which is occupied by the ribs 72 and the lower part of which is indicated schematically at 74 Receives burner for gaseous fuels and forms a combustion chamber for the burner flames.

The embodiment shown in Figure 14 is suitable for use as a water heater, the pipes 69 of the basic components being connected to one another in series by means of a connector 75 connecting the ends 76 of the tubes together which, as shown, are bent around the adjacent end walls 73. The other ends 77, of the pipes form a water inlet and a water outlet, respectively.

The water heater works in a known manner, which is not described further «,

In a modified form of the embodiment according to FIG. 14, the ribs 72 consist of strips of aluminum sheet, the edges of the strips being attached to the associated base component during the casting of that component have been. Such an arrangement allows the rib thickness to be reduced.

The embodiment of FIG. 14 and the modified embodiment just described are not limited to the application or use of the particular piping shown "In a modified arrangement or piping suitable for a gravity circulating water heater", each described above Tube 69 replaced by an upper header, a lower parallel header, and a series of spaced, parallel connecting tubes between the header. The header is parallel to the top of the base and has its ends bent around the end walls of the combustor in the manner that like the tubes 69 described above. The adjacent ends of the upper header are connected to one another, as are the adjacent ends of the lower

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Manifold. In this way four water connections are provided, which enable the chamber to form part of a central heating boiler, for example. The order can also be used as a circulating device.

The water heater can be connected to the so-called balanced Extraction system are operated by attaching the usual lines for the combustion air supply and the removal of the combustion products.

- patent claims -

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Claims (14)

Claims Combustion chamber for water heaters, characterized by the assembly of at least two basic combustion chamber components (1,2,39,65,66), at least one of which is made of cast metal and at least one Viasser pipe (3,38,50,69) embedded therein. '' 2. Combustion chamber according to claim 1, characterized by a plurality of heat transfer fins (11,41,51,72) over at least a portion of the surface of the or each combustion chamber component (1,2,39,65,66) that has the embedded therein Has tube (3,38,50,69). 3. Combustion chamber according to claim 2, characterized in that the combustion chamber component carrying the ribs (11,41,72) (1,2,39,65,66) and the tube (3,38,69) embedded therein form a wall of the combustion chamber. 4 »combustion chamber according to claim 2, characterized by two combustion chamber components (1,2,39,65,66), each of which a side wall (8,71) and two end walls (9,73), the tube (3,38,69) embedded in the side wall (8,71) is on which the ribs (11,41,72) are arranged. 5. Combustion chamber according to claim 1, characterized by a base member having a plurality of heat transfer fins secured against one on the base member Wall Extend-. 6. Combustion chamber after. Claim 3 or 4, characterized in that that the ribs (11) are cast around at least part of the or each water pipe (3). -15- 909841 / IDU 7. Combustion chamber according to claim 3, characterized by that the ribs (41,72) extend from one surface of the wall (71), .., while the or each tube (38,69) on the other Area of the wall lies. 8. Combustion chamber according to claim 4, characterized in that the ribs (41, 72) extend from a surface of the side wall, while the or each tube lies in the other face of the side wall. 9. Combustion chamber according to one of claims 2 to 8, characterized in that the ribs (11,41,72) are not Over the lower part (7.42) of the basic component (1,2,39,65,66) -extend. 10. Combustion chamber according to claim 9 of two basic components, characterized in that the part (8) of the basic component (1,2), over which the ribs (11) extend, in relation to the lower part (7) of the basic component (1,2) in this way is inclined so that the combustion chamber includes an area which extends towards the top of the combustion chamber tapers or tapers to a point. 11. Combustion chamber according to one of the preceding claims, characterized in that a single, serpentine water pipe (14,69) is embedded in the basic component or base body (1,2,65,66), and that the ends of the pipe are accessible from the outside are. 12. Combustion chamber according to one of claims 1 to 11, characterized in that it also comprises a heat exchanger (37) with a series of heat transfer fins (51) which are cast around a further water-carrying pipe (50). 90 9841 13. Combustion chamber according to one of claims 1 to 10, characterized characterized in that in the one or each basic component "(1,2,39,65,66) some water pipes are embedded which a upper header, a lower header and a number of others connecting the upper and lower header Form pipes. 14. Combustion chamber according to one of the preceding claims, characterized in that "the or each water pipe is a copper pipe and that the cast body is made of aluminum. 909841/1014