EP1406049B1 - insertable heat generator and use in an accumulator - Google Patents

Description

The invention relates to a heat generator insert and a memory with a heat generator insert for heating a medium with a heat generator, in particular an oil or gas burner, which has a combustion chamber, an exhaust gas heat exchanger and an exhaust gas guide and via a pressure-tight flange lid to a mounting flange of the medium-containing memory mountable is.

Such heat generators are preferably used for heating process water or heating water in a storage. The tank or boiler can work as a directly heated service water heater or as a buffer storage heat generator. As a heat generator or burner for generating the heat preferably oil or gas burners, with or without utilization of condensing used. A variety of power ranges and types of firing also require a large number of different basic devices.

From the EP 0 841 522 A2 a memory with a heat generator insert for heating a medium with a heat generator, in particular an oil or gas burner is known which has a combustion chamber, an exhaust gas heat exchanger and an exhaust guide and a flange cover to a mounting flange of the medium containing memory is mounted and the heat generator or . Burner, the combustion chamber, the exhaust gas heat exchanger, the exhaust guide and the flange cover are combined into a compact assembly, which are attached as a whole to the memory and released from this. The exhaust gas heat exchanger of the known arrangement consists of a plurality of parallel tubes, which are interconnected by flanges. The effectiveness of this known arrangement has proven to be excellent.

The US-A-5,232,153 and the EP 0 331 969 B1 show a heat exchanger with an axially disposed therein flame tube. Around the flame tube are inner fins of the heat exchanger.

From the NL-A-9201239 is a memory with a generic heat generator module known.

The invention has for its object to improve the known construction.

This object is achieved by the invention defined in claim 1. Further developments of the invention are characterized in the dependent claims.

The invention improves the service-friendliness of the memory and the creep resistance. In particular, it is achieved that condensing liquids can be removed without affecting the burner and exhaust system and with reduced risk of corrosion. It is also avoided that the storage medium can pass through possibly aging seals of the exhaust gas heat exchanger in the condensate circuit and can flow together with this. The novel structural design of the heat generator insert and in conjunction with a memory allows with a small number of basic elements to adapt to the respective required heat output and to different burner types.

The invention consists in principle of a heat generator insert for heating a medium with a heat generator, in particular an oil or gas burner, which has a combustion chamber, an exhaust gas heat exchanger and an exhaust system and is mounted on a flange on a mounting flange of the medium containing memory, and at the heat generator or burner, the combustion chamber, the exhaust gas heat exchanger, the exhaust duct and the flange are combined into a compact assembly, which are attached as a whole to a memory and detached from it, in that the combustion chamber and the exhaust gas heat exchanger by a substantially U -shaped shaped tube are formed, in which the two pipe ends are held in the common flange cover and pipe and flange cover form a one-piece casting.

Among other things, the following advantages are achieved by the invention: A basic type of insert for the storage tank or boiler can accommodate different burner types, such as oil burners or gas burners, with or without the use of the amount of condensation heat contained in the exhaust gas. In addition, instead of the burner insert also a heat exchanger module provided and instead be mounted in the same place alternatively.

Likewise, the same heat generator module in different types of equipment, especially in memory of different sizes, can be used. This is achieved by the fact that all different memory in their dimensions have the same mounting flange. By free variability of the combustion chamber length and the heat exchanger tube length a modular power adjustment and / or a shift of the boiler requirement (condensing / non-condensing, low-temperature / high-temperature boiler) is possible. By selecting the material for the casting containing the combustion chamber and the exhaust gas heat exchanger, it is possible to decide between particularly highly thermally conductive materials and particularly corrosion-resistant materials (eg aluminum, coated aluminum, enamelled steel, glass, corrosion-resistant coated steel). Preferably, the casting is made of aluminum. Special advantages result from the uniform insert part for the storage and the time required for cleaning, maintenance and repairs.

Preferably, the releasable attachment of the Wärmeerzeugereinschubs done with its flange on the mounting flange in the upper, warmer area of the memory. Namely, in a stratified charge storage apparatus in which the low temperatures in the lower portions and the higher temperatures in the upper portions of the accumulator are concerned, the combustion chamber temperature is always transferred to the warmer layers. The combined with the combustion chamber in a U-shaped casting exhaust heat exchanger is then preferably arranged spatially below the combustion chamber. As a result, the exhaust gas temperature affects the colder layers. The medium surrounding the heat exchanger thus cools the exhaust gas to low temperatures, thereby achieving good efficiency and low pollutant levels. It can be achieved as cold as possible exhaust gas at the same time, for. As for the condensation of moisture in the exhaust gas at condensing operation. The resulting condensate is discharged by the lower sides of the upper and lower tube parts are arranged inclined to the flange cover side or dimensioned. In otherwise vertical storage, the condensate is discharged through the lid to the outside.

There may also be an inclination of the insertion of five degrees with respect to the horizontal. Alternatively, the combustion chamber may also have a slope directed towards the rear of the reservoir, whereby the condensate of the upper tube part passes over the curvature of the U-shaped tube into the lower tube part, which then has an inclination directed forwards towards the lid. Finally, it is also possible to drain the condensate of the upper combustion chamber through an opening on the flange cover to the outside and from there into the lower tube part. By rotation of the assembly relative to the boiler by 180 °, such that the exhaust gas heat exchanger is located spatially above the combustion chamber in the warmer area of the memory, it can also be prevented in case of need, that even creates condensate.

In a preferred embodiment, the tube part in the region of the heat exchanger has an oval, rather flat cross-section. Between the then substantially vertical walls of this pipe part a plurality of horizontal struts are arranged and potted with the wall, the between them form comparatively narrow spaces for the exhaust gas flow path.

The upper and lower legs of the tube are separated from each other by a gap which allows complete flushing of the combustion chamber by the storage medium and thus optimum transfer of heat from the combustion chamber to the medium. In addition, a direct temperature transition from the combustion chamber to the exhaust gas heat exchanger in the lower tube leg is prevented or at least reduced by the spatial separation of the two tube parts. Finally, the medium also completely flows around the exhaust gas heat exchanger and extracts heat from this pipe part, thus cooling the exhaust gas. The oval cross-section causes largely equal lengths of the struts and thus the same cooling over the length of the struts.

A receptacle for a temperature sensor is provided in the flange cover. This receptacle is a bore arranged in the region of the combustion chamber and extends as far as or into the wall of the upper tube leg. The temperature sensor is provided with means for mechanical temperature limitation in the combustion chamber or connected.

In a preferred embodiment, it is provided that the combustion chamber is designed for interchangeable, optional inclusion of a burner for gas or a burner for oil.

These are in particular so-called low-sulfur oils containing less than 50 ppm of sulfur. It has been found that with inventively constructed inserts or storage with such inserts with virtually identical design, moreover, both such low-sulfur oil and gas can be burned. If, therefore, the combustion chamber is designed such that it can optionally accommodate both types of burner, then the entire heating system with the reservoir can be operated with two different heat generators, without the need for tedious dismantling and reassembly or readjustment of the system. It is sufficient just to replace the burners.

In particular, in such low-sulfur oils, it is also also advantageous if in particular the lower pipe leg can be easily cleaned for special soiling. For this purpose, it is preferably provided that the outlet of the lower leg of the flange is designed openable.

In addition, a vertical or horizontal slot, in particular of a width of 5 to 20 mm, in the inner ribbing is particularly preferably provided. It is then easy to retract into this slot with a high-pressure, brush or other cleaner, thus eliminating deposits on the ribs.

The slot can also be closed outside of the cleaning times by a flow obstruction or a flow plate in such a way that an undesirable easy flow through is prevented, which could otherwise reduce the effectiveness of the heat exchange properties of this ribbing.

Figur 1

einen senkrechten Schnitt durch einen Speicher mit einem Einschub mit Brenner;

Figur 2

eine Seitenansicht des Einschubes ohne Brenner;

Figur 3

eine Draufsicht auf den Flanschdeckel des Einschubes;

Figur 4

eine Draufsicht auf die Rückseite des Einschubes;

Figur 5

eine perspektivische Ansicht des Einschubs;

Figur 6

eine Draufsicht auf die Abgaswegseite des Einschubes;

Figur 7

einen Schnitt durch den Speicher mit schräg montiertem Einschub;

Figur 8

einen senkrechten Schnitt durch das U-förmige Rohr;

Figur 9

einen Längsschnitt durch den oberen Rohrschenkel;

Figur 10

eine Draufsicht auf den Flanschdeckel einer alternativen Ausführungsform eines Einschubes eines Speichers; und

Figur 11

eine Draufsicht auf die Ausführungsform aus Figur 10 bei abgenommenem Deckelelement.

The invention will be explained in more detail below with reference to an embodiment shown in the drawings, for example. Show in it

FIG. 1

a vertical section through a memory with a slot with burner;

FIG. 2

a side view of the slot without burner;

FIG. 3

a plan view of the flange of the drawer;

FIG. 4

a plan view of the back of the drawer;

FIG. 5

a perspective view of the insert;

FIG. 6

a plan view of the exhaust path side of the drawer;

FIG. 7

a section through the memory with obliquely mounted slot;

FIG. 8

a vertical section through the U-shaped tube;

FIG. 9

a longitudinal section through the upper tube leg;

FIG. 10

a plan view of the flange of an alternative embodiment of a drawer of a memory; and

FIG. 11

a plan view of the embodiment FIG. 10 with removed cover element.

FIG. 1 shows a vertical section through a memory 13 for a heat medium with a combustion chamber 4 and a burner 1 and an exhaust gas heat exchanger 2 having, interchangeable drawer in a simplified schematic representation.

The one hand with air and on the other hand with oil or gas fed burner 1 with a combustion head 1a is interchangeable used by a Brennkammerflansch 3 in the combustion chamber 4 as another insert. The combustion chamber 4, together with the exhaust gas heat exchanger 2 is a one-piece component, in particular cast aluminum in the form of a U-shaped tube 5. The two ends 51, 52 of the tube 5 have their openings in a flange 6, in the mounting flange 7 of the memory 13 is mountable and is held by this. The pipe end 52 of the exhaust gas heat exchanger 2 is in an exhaust passage 20, which is removably connected to the flange 6 of the drawer 2, 4. The insert 2, 4, 6 forms a compact unit, which is mounted as a whole on the mounting flange 7 of the memory 13. The attachment is preferably done by machine screws 8 on the periphery of the flange 6 of the drawer and mounting flange 7 of the memory 13, but can alternatively be done by a bayonet lock. This insert can be removed as a compact unit without disassembly of other components of the memory 13. The U-shaped tube 5 has two tube legs 3, 54 which are positioned in the memory by adjustment or predetermined position of the flange 6 in the mounting flange 7 of the memory 13 so that the tube leg 53 with the combustion chamber 4 above and the tube leg 54 with the main part the exhaust heat exchanger 2 are below. Both pipe legs 53, 54 are separated from each other by a gap 9. As a result, both tube parts 53, 54 are surrounded by the storage medium. For reasons of stability, the gap 9 can not extend so far in the direction of the pipe bend 55, as would be desirable for the creation of a pronounced exhaust path. The combustion chamber 4 is made possible by a bulge 11 in the upper tube leg 53 of the tube 5, which then merges into the narrower tube region of the exhaust gas heat exchanger 2 and into the exhaust gas guide 20. The flange cover 6 contains, in addition to the two openings for the tube ends 51, 52 and the flange mounting holes 8 in the peripheral region one or more serving for stabilization webs 12. These can also include blind holes for reaching into the interior of screws 81.

At the lowest point of the upper pipe end 51, an opening 59 may be provided, which serves to improve the condensate discharge.

The casting 2, 4, 6 has on the inside and on the outside of the pipe part 5 cast-ribbed ribs 22, 23. The upper leg 53 of the tube 5 has in the region facing the flange 6 in the combustion chamber 4 longitudinal ribs 21 and in the U-bend 55 of the tube 5 facing the beginning of the inner rib 22 of the exhaust gas heat exchanger 2, which extends over the bend 55th and the lower leg 54 extends to the flange 4. The inner rib 22 on its combustion chamber 4 facing region is arranged so that damage to the ribbing 22 is at least reduced by the burner 1. For this purpose, the inner rib 22 is formed on its combustion chamber 4 facing region, for example, funnel-shaped. The inner rib 22 has a rib-free region 10 in the curved region 55, which allows an unobstructed flow of exhaust gas in the curved region 55 for the exhaust gas routing. The subsequent exhaust gas heat exchanger 2 is on the one hand adapted to the transition to the combustion chamber 4 and otherwise free with respect to the outer dimensions and the shape of the inner rib 22. In a preferred embodiment, the tube 5 in the region of the heat exchanger 2 has an oval, rather flat cross-section. Between the then substantially vertical walls of this pipe part a plurality of horizontal struts 221 are arranged and potted with the wall of the tube 5, which form between them comparatively narrow spaces for the Abgasströmungsweg. This results in relatively short, mostly equal length struts 221 with the same temperature conditions of heat conduction and at the same time a favorable exhaust system.

The upper and lower legs 53, 54 of the tube 5 are separated from each other by the gap 9, which allows a complete flushing of the combustion chamber 4 by the storage medium and thus an optimal transfer of heat from the combustion chamber 4 to the medium.

In addition, a direct temperature transition from the combustion chamber 4 to the exhaust gas heat exchanger 2 in the lower tube leg 53 is prevented or at least reduced by the spatial separation of the two pipe parts 53, 54. Finally, the medium also completely flows around the exhaust gas heat exchanger 2 and extracts heat from this pipe part, thus cooling the exhaust gas.

The burner 1 facing the beginning of the exhaust gas heat exchanger 2 is funnel-shaped toward the combustion chamber 4. At the same time there is a transition from the bulge 11 of greater circumference to the exhaust path of the tube 5 smaller cross section. On the inner wall of the combustion chamber 4 longitudinal ribs 21 are provided, which increase the surface of the combustion chamber and cause a better heat transfer. Through the bulge 11, the heat exchanger surface between the combustion chamber 4 and the surrounding the combustion chamber, to be heated medium such as in particular service or heating water is increased. The combustion chamber is designed so that a possible tendency to vibration of the burner 1, 1a is effectively suppressed. The outside of the tube 5 is provided with a Außenrippung 23. This outer rib 23 is preferably designed by substantially vertically arranged ribs 23. The insert with combustion chamber 2 and exhaust gas heat exchanger 4 is located in the actual memory 13, in which there is to be heated, standing or flowing water. The number and thickness of the struts 22, 221 in the exhaust path of the tube 5 and the cross section of the tube 5 can be dimensioned differently to achieve a uniform flow velocity in the direction of the exhaust gas flow. The struts 221 themselves can be dimensioned differently thick over their length. The memory 13 is surrounded by an outer shell 17 to form a gap 16. The gap 16 is provided with a heat insulating material 18 such. B. filled glass wool.

FIG. 2 shows a side view of the drawer 2, 4, 6 without burner 1. The flange cover 6 are 20 connections for commercial exhaust pipes and a mounting flange 3 for the insertion and attachment of the burner 1, 1 a molded. An inclination of the pipe parts 53, 54 can be achieved without special shaping of the insert characterized in that the mounting flange 7 is installed obliquely in the memory 13. This would give the insert 2, 4, 6, the required slope for the condensate flow. Holes at the lowest points of the upper leg provide for the outflow from the pipe 5. The inclination is for example 5 ° relative to the horizontal. This advantageously prevents corrosion spots from occurring in the lower exhaust pipe 54.

FIG. 3 shows a plan view of the flange 6 of the drawer 2, 4, 6. Clearly visible in the opening to the end 54 of the lower tube 52, the struts 221. In the opening to the end 53 of the upper tube 51 to the periphery of the tube 5 are In the combustion chamber 4, the plurality of flows through the exhaust, the exhaust gas heat exchanger 2 forming struts 221. In the flange 6, in particular in the region of Brennkammerflansches 3, a receptacle 58 is provided for a temperature sensor This receptacle 58 is for example a arranged in the combustion chamber 4 bore, which extends to or into the wall of the upper, the combustion chamber containing tube leg 54. The temperature sensor is provided with means for mechanical temperature limitation in the combustion chamber or connected. This ensures that in case of too low water level in the memory 13 overheating of the drawer is avoided.

FIG. 4 shows a plan view of the back of the drawer 2, 4, 6. With the holes 8 is provided for the screw of the flange 6 with the mounting flange 7 of the memory 13. For the condensate flow and for the cleaning and inspection of the lower heat exchanger tube 54, a groove 57c is provided on the underside 57b of the tube leg 54. This groove is free of struts 221 and therefore accessible for cleaning when the outer exhaust pipe is removed.

Holes at the lowest point provide for the drainage of the condensate from the tube 5 during operation of the tube. 5

FIG. 5 shows a perspective view of the drawer 2, 4, 6th

FIG. 6 shows a view of the drawer 2, 4, 6 on the Abgaswegseite with clearly visible cross sections of the individual pipe parts 53, 54, 11th

FIG. 7 shows a sectional view through a memory 13 with inclined slot 2, 4, 6th The inclination is, for example, with respect to the horizontal 5 °. To follow this purpose, the combustion chamber itself may also be inclined towards the outside and / or the inside of the storage. The risk of corrosion is caused by aggressive salts which form during the evaporation of the collecting condensate and the resulting crystallization. The flow of condensate slows down as soon as the flowing medium becomes colder

The memory 13 is surrounded by the outer jacket 17 to form a gap 16. The gap 16 is provided with a heat insulating material 18 such. B. filled glass wool.

By the inner rib 22, the flow resistance for the exhaust path 10 is increased. The core flow is disturbed and it is created by turbulence. An increase of the pressure resistance occurs. As a result, the flow is forced through the rib 22 which is conductively connected to the tube wall. As a result, there is a better heat exchange with the medium flowing around the exhaust pipe parts. The exhaust gas heat exchanger tube 5 may have different wall thicknesses along the exhaust path. As a result, for example, a thicker wall thickness can be provided in the area of possible corrosion points. As a result, despite corrosion, the wall of the tube may have a longer life. Regions of such thicker material thicknesses are preferably provided in the lower region of the tube. The exhaust path is formed by the spaces between the ribs 22, 221. The exhaust gas flow can be influenced by different distances of the ribs.

The attachment of the burner 1 on the combustion chamber flange 3 of the flange is preferably carried out by tightening the burner flange cover on which the burner is mounted. This Brennkammerflanschdeckel is preferably made of fire-retardant material and at the same time forms the boiler door.

The upper portion of the memory 13 is divided into three parts. The first, uppermost area is used for hot water and is therefore hot. The heat dissipation takes place here preferably via an external heat exchanger. A second, middle layer is preferably weather-controlled tempered. Here, a temperature sensor is preferably provided to allow reheating at the desired location. The burner output is regulated here. Through a burner control in the range of 100 to 30%, the weather-compensated temperature is reached. If warm water is desired, a signal is given that the full power is needed. From the combustion chamber 4 then flows the hot water upwards. The lower area is cold.

The casting 4, 5, 6 has at the end of the exhaust gas heat exchanger 2 a molded connection with seals for the outer exhaust pipes 20.

FIG. 8 shows a vertical section through the U-shaped tube with a view of the entrance of the heat exchanger 2 and the inner rib 221 of the lower tube 54. Between the two tube legs 53 and 54, the gap 9 is visible.

FIG. 9 shows a longitudinal section through the upper tube leg 53 with the combustion chamber 4 and the beginning of the exhaust gas heat exchanger 2 with the conical space 15 of the inner rib 22 and the ribs 22 free space 56 of the exhaust path.

In the FIG. 10 an alternative embodiment is shown, largely similar to the illustration in FIG FIG. 3 , Unlike there, however, the lower tube end 52, at which the lower tube leg 54 again passes through the flange 6 to the outside and is connected to the outer exhaust pipe 20, larger than in the embodiment according to FIG. 1 ,

This area is here provided with an openable cover element 71. This lid member 71 is closed during operation, so that in this respect no change in the operating description in relation to the execution in the FIGS. 1 and 3 results.

In FIG. 11 is the embodiment of FIG. 10 shown, in which case the openable lid member 71 is removed. In particular for cleaning or maintenance purposes, this cover element 71 can be opened and / or removed. Then, from the direction of the outer exhaust pipe 20, a high-pressure cleaner or another cleaning element can be introduced into the inner rib 22.

It can be seen that the cover element 71 releases a larger opening. Good to see in particular the here vertically arranged slot 24 between the inner rib 22. There is a total of a highly practical cleaning opening.

LIST OF REFERENCE NUMBERS

1

burner

1a

Brennkopf

2

Exhaust gas heat exchanger

3

Brennkammerflansch

4

combustion chamber

5

Exhaust pipe, U-shaped

6

flange
Insert, casting from 2, 4, 6

7

Mounting flange on the memory 13

8th

Screw connection on the circumference of 6

9

Space between 51 and 52

10

exhaust system

11

bulge

12

Webs on the flange cover

13

Storage

14

Wall for separating the exhaust gas passage in 54 of the combustion chamber. 4

15

cone-shaped free space

16

gap

17

outer sheath

18

thermal insulation material

19

bayonet catch

20

outer exhaust pipe

21

Seal in flange for 20

22

Innenrippung

23

Außenrippung

24

slot

51

upper pipe end

52

lower pipe end

53

upper pipe leg

54

lower tube leg

55

pipe bend

56

rib-free space in 55

57

bottom condensate drain path in 53

57b

lower condensate drainage path in 54

57c

Groove in 54

58

Hole in 6 for temperature sensor

59

Condensate drain in 53

71

Cover element for 52

81

Holes in the flange cover, which extend up to webs 12

221

pursuit

222

Longitudinal ribs in 4

Claims (24)

1. Insertable module for a heat generator, in particular an oil- or gas burner, comprising a combustion chamber (4), an exhaust-gas heat exchanger (2) and an exhaust-gas guide (10) as well as a flanged lid (6) that is mountable on a fastening flange (7) of a storage device (13) containing a medium, and wherein the combustion chamber (4), the exhaust-gas heat exchanger (2), the exhaust-gas guide (10) and the flanged lid (6) are combined into a compact assembly group, which can as a whole be fastened to and detached from the storage device (13),
   wherein the combustion chamber (4) and the exhaust-gas heat exchanger (4) are formed by a substantially U-shaped pipe (5),
   wherein the two pipe ends (51, 52) are held in the common flanged lid (6),
   wherein pipe (5) and flanged lid (6) form an integral casting (5, 6),
   wherein the insertable module (2, 4, 5, 6) is fastenable in the storage device (13) in such a way that the combustion chamber (4) is disposed in the upper limb (53) of the pipe (5),
   wherein the casting (5, 6) at the inside and outside has integrally cast ribbing (22, 23),
   wherein the upper limb (53) of the pipe (5) in the region facing the flanged lid (6) has the combustion chamber (4) and in the region facing the U-shaped curvature of the pipe (5) has the start of the internal ribbing (22) of the exhaust-gas heat exchanger (2) that extends over the curvature (55) and the lower limb (54) as far as the flanged lid (6),
   characterized in
   that the internal ribbing (22) at its region facing the combustion chamber (4) is configured to be widened in the manner of a funnel towards the combustion chamber (4) so as to at least reduce damage to the ribbing (22) by the burner, and
   that the underside (57) of the upper pipe limb (53) is configured or arranged in such an inclined manner that condensing liquid can flow off in the direction of the curvature (55) and/or the flanged lid (6).
2. Insertable module according to claim 1,
   characterized in
   that the external ribbing extends vertically and the internal ribbing extends horizontally.
3. Insertable module according to one of claims 1 or 2,
   characterized in
   that the casting has a smaller cross section in the region of the horizontal ribbing than in the region of the combustion chamber.
4. Insertable module according to one of claims 1 to 3,
   characterized in
   that the upper and lower limbs (53, 54) of the pipe (5) are separated from one another by a gap (9) that allows a complete flushing of the combustion chamber (4) by the storage medium.
5. Insertable module according to claim 4,
   characterized in
   that the upper and lower limbs (53, 54) of the pipe (5) are separated from one another by a gap (9) that allows a complete flushing of the combustion chamber (4) and of an adjoining part of the exhaust-gas heat exchanger region in the upper pipe limb (53) by the storage medium.
6. Insertable module according to claim 4 or 5,
   characterized in
   that the upper and lower pipe limbs (53, 54) are separated from one another by the gap (9) and by an interior wall (14) that adjoins in the direction of the curvature (55).
7. Insertable module according to one of claims 1 to 6,
   characterized in
   that the pipe end (52) of the lower pipe limb (54) is configured in an openable manner, in particular is provided with a detachable lid element (71).
8. Insertable module according to one of claims 1 to 7,
   characterized in
   that in the internal ribbing (22) of the lower pipe limb (54) there extends a horizontal or vertical slot (24), which is accessible from the pipe end (52).
9. Insertable module according to claim 8,
   characterized in
   that in the slot outside of the cleaning sides a flow inhibitor, in particular a flow baffle, is disposed.
10. Insertable module according to one of claims 1 to 9,
    characterized in
    that in the flanged lid (6) there is provided a receiver (58) for a temperature sensor.
11. Insertable module according to claim 10,
    characterized in
    that the receiver (58) is a bore that is disposed in the region of the combustion chamber (4) and extends up to or into the wall of the upper pipe limb (53).
12. Insertable module according to claim 10 or 11,
    characterized in
    that the temperature sensor is provided with, or is connected to, means for mechanically limiting the temperature in the combustion chamber (4).
13. Insertable module according to one of the preceding claims,
    characterized in
    that the combustion chamber (4) is configured for the exchangeable, selective accommodation of a burner for gas or a burner for oil.
14. Insertable module according to one of the preceding claims,
    characterized in
    that the internal ribbing (22) in the curved region (55) has a rib-free region (56) that allows an unimpeded flow of exhaust gas.
15. Insertable module according to one of the preceding claims,
    characterized in
    that the underside (57b) of the lower pipe limb (54) is configured or arranged in such an inclined manner that condensing liquid can flow off in the direction of the flanged lid (6).
16. Insertable module according to claim 14 or 15,
    characterized in
    that the upper pipe limb (53) at its underside (57) facing the flanged lid (6) has a discharge opening (58) for the condensing liquid.
17. Insertable module according to claim 16,
    characterized in
    that the discharge opening (58) for the condensing liquid comprises a connection to the lower pipe limb (54).
18. Insertable module according to one of the preceding claims,
    characterized in
    that in the exhaust gas path from the combustion chamber (4) to the flanged lid (6) a multiplicity of mutually parallel internal ribs (22) serving as exhaust-gas heat exchangers are provided, which are configured as columns disposed substantially at right angles to the walls of the pipe parts (53, 54, 55), and the exhaust gas path is formed by the gaps between the ribs.
19. Insertable module according to one of the preceding claims,
    characterized in
    that provided at the inner underside (57b) of the lower pipe limb (54) is a groove (57c) extending in pipe direction, which is of a rib-free configuration and allows inspection and/or cleaning.
20. Insertable module according to one of the preceding claims,
    characterized in
    that on the outside of the pipe (5) external ribs (23) are provided, which extend in vertical direction and are used simultaneously for heat exchange purposes and promote the flow of the liquid in the storage device.
21. Insertable module according to one of the preceding claims,
    characterized in
    that integrally cast on the casting (4, 5, 6) at the end of the exhaust-gas heat exchanger (2) is an attachment having seals for exhaust gas pipes.
22. Insertable module according to one of the preceding claims,
    characterized in
    that the casting is manufactured from material of particularly high conductivity, preferably from aluminium.
23. Insertable module according to one of the preceding claims,
    characterized in
    that the inclinations of the undersides of the pipe limbs (53, 54) are achieved by shaping of the pipe parts and/or by an oblique arrangement of the built-in component (2, 4, 6) in the storage device (13).
24. Storage device having a heat-generator insertable module according to one of the preceding claims.

Images