EP2385302B1 - Chimney system - Google Patents

Description

1. Field of the invention

The invention relates to a fireplace system for combustion plants, in particular for gas or oil-fired heating systems. The chimney system is used for the removal of combustion gases, the supply of combustion air and for the removal of used room air. Such a fireplace system can also be referred to as an air-exhaust-exhaust system.

2. State of the art

Buildings are mostly heated by burning hydrocarbons such as oil, natural gas or coal. The resulting carbon dioxide is partly responsible for the greenhouse effect. The retention of carbon dioxide would require such a large amount of energy that it was no longer worthwhile from the energy balance to burn the hydrocarbons. In order to keep air pollution as low as possible and to save our resources on fossil fuels, it is important to reduce the consumption of fuel.

Since the hydrocarbons are derived from living matter, they contain a large amount of carbon and in smaller quantities a variety of other substances, such as sulfur and nitrogen.

These substances get into the combustion gas during the combustion of hydrocarbons. The combustion gas therefore contains in addition to water vapor, carbon dioxide, soot, sulfur oxides and nitrogen oxides and sulfuric acid. Most of the nitrogen oxides are nitrogen, which also comes from the combustion air.

In contrast to carbon dioxide and nitrogen oxides, water vapor, soot, sulfur oxides and sulfuric acid can be at least partially retained by suitable means but with high technical and energy expenditure.

Traditional fireplaces are either made of chamotte or made of stainless steel. These materials are not sufficiently corrosion resistant and sputtered if the combustion gas would condense therein, i. if they are exposed to a liquid, acidic condensate with pH values of 1.5 - 3.7 for a long time.

The temperatures in such conventional chimneys must therefore not fall below the dew point of the combustion gas to prevent condensation of the combustion gas. In conventional fireplaces, therefore, the temperature of the combustion gas to the boiler is so tellt that there is no condensation in the chimney and therefore no sooting.

This has the consequence that the combustion gases are completely discharged into the atmosphere, which means a high pollution of the atmosphere and a high energy loss.

For some time, therefore, chimneys made of high-quality plastics such as PVDF (polyvinylidene fluoride) are used, which are able to withstand the action of the condensate. Here, a condensation of the combustion gases is deliberately allowed and thereby recovered a large part of the energy which is bound in the combustion gas. One speaks therefore also of so-called condensation chimneys. In addition, a large part of the pollutants contained in the flue gas, polluting substances such as sulfuric acid, unburned hydrocarbons, water vapor and soot can be retained in the chimney pipe.

The energy savings that come from a lower demand for fuel, this technique is based on several factors. First of all, in the case of condensation chambers, the boiler exhaust temperature can be lowered to a minimum. In the so-called condensing technology, the temperature of the exhaust gas when leaving the boiler only about 30-40 ° C and in the low-temperature technology about 90-140 ° C amount. A reduction of the flue gas temperature means a more efficient use of the heat of combustion for heating the heat carrier (usually water) and a saving of expensive fuel. Condensation chimneys allow for the first time to operate the boiler with the manufacturer specified minimum boiler water temperature from which then results in the lowest possible exhaust gas temperature and, in turn, the highest possible efficiency of the firing plant. In addition, this technology allows considerably longer burner run times, whereby startup and shutdown losses (eg factor 10) of the system are avoided and material stress is minimized.

In addition, a further cooling of the flue gas takes place in the condensation chimney, which is not thermally insulated in this technique and is surrounded by incoming fresh combustion air. The preheated along the chimney pipe of the condensation chimney along fresh and ambient temperature-cold combustion air is preheated. As a result of the cooling of the combustion gases, a large part of them will condense, the heat of condensation in turn being given off to the fresh combustion air.

The thus preheated fresh combustion air is then used to operate the boiler and thus reused the heat of the combustion gases.

In the chimney, the condensation of the combustion gases produces a liquid condensate which, depending on the fuel, is highly acidic and flows down the chimney walls. At the foot of the chimney pipe, the condensate is caught and sent to a neutralization tank, which binds and neutralizes the pollutants. This neutralization tank usually contains an activated carbon filter and a neutralization granules, which neutralizes the acids of the condensate. The neutralization granules used are either chemically produced calcium carbonate or natural lime. After neutralization, pure harmless water is released from the condensate, which is sent to the sewage system. For example, one liter of burnt oil produces 0.8 liters of condensate that is not released into the environment as exhaust gas.

The DE 3 421 112 A1 describes a condensation chimney, which is used for the application of the technique of cold, wet, condensing chimney. This fireplace develops its greatest efficiency in terms of heat recovery and combustion gas purification in heating systems for smaller buildings. Such a fireplace system is made of individual welded together plastic pipes and is only suitable for a fireplace.

From the publication EP 2 083 218 A2 a chimney system is known in which within a chimney pipe for combustion gases, a chimney pipe is arranged with a smaller diameter, is transported in the fresh air.

From the publication DE 199 18 441 C1 is known an exhaust and air intake system for fireboxes in buildings, in which an exhaust pipe is disposed within an exhaust shaft of manhole blocks. In the jacket space between the exhaust pipe and exhaust shaft of the furnace supply air is supplied. In addition, at least one room exhaust duct is connected to the jacket space.

A great energy saving potential is also given in multi-storey buildings with multi-storey heating, in which several boilers or heaters are connected in the form of a cascade to a common fireplace, which, in order to avoid sooting of the fireplace, must be operated at very high exhaust gas temperatures.

The invention therefore has as its object to provide a condensation chimney system, in particular for multi-storey buildings with multi-storey heating, which recovers heat energy and substantially improves the installation and capital expenditure of such a condensation chimney system.

Furthermore, there is a need, in particular for insulated buildings with new windows, to ventilate and vent the living spaces, since these are made as airtight as possible for energetic reasons. In simple ventilation systems, this is often solved by exhausting the exhaust air centrally and allowing the supply air to flow in a decentralized manner via suitable openings in the outer walls or on the windows. For the central extraction, a high level of construction work must be carried out, so that such systems are often not used in renovations, which leads to a poor and usually too humid indoor climate. The invention has as its object to solve the problem of ventilation of buildings.

The above-mentioned problems arise in particular in the energetic renovation of multi-storey residential buildings, whereby the building is insulated, new windows and a new heating with condensing technology are installed. In such renovations, a controlled ventilation must be installed and a fireplace renovation performed and a room air independent combustion air supply are provided.

3. Summary of the invention

The above objects are achieved by the subject matter of the independent claims. Advantageous developments of the invention are the subject of the dependent claims.

In particular, the above-mentioned problem is solved by a chimney system comprising a chimney pipe for removing combustion gases, a combustion air pipe for supplying combustion air and an exhaust duct for removing room air, wherein the chimney pipe is disposed inside the combustion air pipe and the combustion air pipe is disposed inside the exhaust duct , With such a fireplace system, on the one hand, a proper removal of the combustion gases through the chimney pipe is ensured, whereby the arrangement of the chimney pipe in a combustion air pipe, the combustion air are preheated by the hot combustion gases and thus the heat energy is reused in the flue gases. On the other hand, in the chimney system spent air in a duct exhausted room air can be removed from the building, in which case the combustion air, which is supplied to the heater, is preheated by the warm exhausted room air. Thus, the heat energy, which is in the used room air, recovered through the combustion air in part.

The fireplace system therefore three different functions are carried out in an energetically advantageous manner, namely first, the removal of the combustion gases from the corresponding boiler, second, a controlled supply of combustion air to the boiler, as is necessary for a room air independent operation of the boiler, and thirdly, a controlled discharge of spent room air via an exhaust duct, in the Combustion air pipe and flue pipe are arranged. To ensure these three functions, therefore, only a corresponding Kaminsanierung must be carried out and there must be no additional Zuluft- or exhaust ducts are laid in the building. As a result, the installation effort is reduced considerably, which is very advantageous especially for renovations of apartment buildings. Usually, the existing there already existing fireplace can be used as an exhaust duct for the removal of the room air.

In a preferred embodiment, the chimney system is designed as a countercurrent heat exchanger, wherein the warm combustion gases through the chimney pipe transfer heat to the cold combustion air and heat them and wherein also transfers the warm room air through the combustion air pipe heat to the cold combustion air. By this mutual heat transfer, on the one hand by the warm combustion gases and on the other hand by the warm exhausted room air to the cold combustion air, a large part of the otherwise lost heat energy is recovered. The fireplace system therefore contributes significantly to energy savings.

Preferably, the chimney pipe made of an acid-resistant plastic material, preferably made of PVDF. Due to an acid-resistant plastic material, preferably PVDF, the chimney pipe can be easily operated with low exhaust gas temperatures, so that the boiler can be operated in condensing operation. Advantageously, the warm flue gas condenses in the chimney pipe and the condensate runs down inside the chimney pipe. Due to the condensation, therefore, further heat can be recovered.

Preferably, the chimney pipe sections of flexible tube. A flexible chimney pipe can compensate for length and position inaccuracies, which brings advantages in particular in the renovation of existing older chimneys. Furthermore, the heat transfer from the hot flue gases to the cool combustion air is particularly effective due to the increased surface area of such flexible tubes.

Preferably, the chimney pipe is arranged by means of spacers in the combustion air pipe. To center the chimney pipe in the combustion air tube spacers are used, which are attached to the chimney pipe.

Preferably, the combustion air pipe sections of a variable-length tube, preferably made of a variable-length, flexible aluminum tube. By the combustion air pipe has sections of a variable-length pipe, in particular an aluminum flex pipe, the assembly of the fireplace system is particularly simple. For the assembly of the chimney system namely, the combustion air pipe can then be pushed together to easily assemble the chimney pipe arranged therein.

Furthermore, a flexible variable-length tube provides a larger surface than a corresponding smooth rigid tube, so that the heat transfer from the warm room air to the cold combustion air is particularly effective. In addition, a variable-length, flexible aluminum tube compensates for assembly inaccuracies, especially in the renovation of existing fireplaces.

Preferably, the exhaust duct is formed by chimney blocks of a mineral material. Old, to be renovated chimneys usually also consist of chimney stones made of a mineral material and can serve directly as exhaust duct after a thorough cleaning.

Preferably, the chimney system has a single condensate drainage for the entire chimney system, wherein the condensate drain is connected to the lower end of the chimney pipe. Preferably condensate arising from the chimney pipe itself is removed from the chimney pipe itself and from the heating systems connected thereto. This eliminates separate condensate lines, separate dry siphons and individual discharges into the sewage system. The condensate is collected centrally on a condensate drain at the bottom of the chimney pipe and optionally introduced via a neutralization box in the sewer system.

Preferably, the chimney system further comprises an exhaust fan, which blows room air into the exhaust duct. Preferably, an exhaust fan is provided per apartment. The extract air fan determines the amount of air to be exchanged in the home or building by injecting used room air into the exhaust air duct so that fresh air can flow into the building at decentralized inlet openings on the building shell. The chimney system thus assumes the function of a central exhaust air system. In order to prevent contamination of the exhaust air duct, an exhaust air filter is arranged in front of the respective exhaust fan, which effectively filters out dusts, grease droplets and other contaminants in the room air. The exhaust filter may include a filter mat, which must be changed at regular intervals.

Preferably, the chimney system further comprises a connection element for connecting a heater to the chimney system, wherein the connection element has a chimney pipe tee, which is connected to the chimney pipe, and a combustion air pipe tee, which is connected to the combustion air pipe, wherein the combustion air pipe tee surrounds the chimney pipe tee. By means of such a connecting element, which consists of two T-pieces, wherein the chimney tee is arranged within the combustion air pipe tee, the chimney pipe and the combustion air pipe can be connected to the corresponding boilers on the respective floors of a building. This double tee is preferably securely fastened in the chimney stone by means of a special holder, particularly preferably by means of an expansion plug. Here, both a gas-tight connection of the chimney pipe for the exhaust gases of the boiler, as well as a gas-tight connection of the combustion air pipe is given to the boiler. Thus, within the chimney system, three media can be transported without any problems, for example combustion gases, combustion air and exhaust air from the building.

Preferably, the lowermost combustion air tube tee and the lowermost chimney tee are connected to a hood cover which closes down the combustion air tube tee and provides a passageway for the chimney pipe. The cuff lid forms a seal for the combustion air after the lowest connection piece on the chimney system. He allows the passage of the chimney pipe so that any condensate can be directed down to the single condensate drain.

Preferably, the chimney system further comprises a chimney inlet, which is connected to a lateral connection of the chimney pipe tee and is preferably arranged to fall down to the chimney pipe, and a combustion air connection pipe, which is connected to a lateral connection of the combustion air pipe tee and which surrounds the tubular chimney inlet. In addition to the flue gases which are introduced into the chimney pipe via this pipe, condensate from the heater can also flow into the chimney pipe via a falling chimney inlet. About the combustion air connection pipe, a boiler connected to it is supplied with the necessary combustion air, so that it is operated room air independent.

Preferably, the fireplace system allows multiple occupancy and has a plurality of exhaust fans and / or a plurality of connection elements. The fireplace system can be used in particular in multi-storey housing, in a house with several floors each floor has its own heating or their own boiler, which are connected to a common fireplace system. Furthermore, the individual apartments can be centrally vented via the common fireplace system.

Preferably, the chimney system further comprises a wall panel, which provides a sealed passage for the combustion air connection pipe and at the same time an airtight connection of the exhaust fan to the exhaust duct. The entire connection of a heater as well as the connection of the fan to the exhaust duct is made by a common wall panel, which considerably simplifies the assembly of these components.

1. a. Anordnen des Kaminrohrs innerhalb des Verbrennungsluftrohrs,
2. b. Anordnen des Verbrennungsluftrohrs mit dem darin angeordneten Kaminrohr innerhalb des Abluftkanals,
3. c. Zusammenschieben des Verbrennungsluftrohrs, um das Kaminrohr mit weiteren Elementen zu verbinden, danach
4. d. Auseinanderziehen des Verbrennungsluftrohrs, um das Verbrennungsluftrohr mit weiteren Elementen zu verbinden.

The above objects are also achieved by a method for assembling a chimney system comprising a chimney pipe for exhausting combustion gases, a combustion air pipe having sections of a variable-length pipe for supplying combustion air and an exhaust duct for removing room air, the method comprising the following steps :

1. a. Arranging the chimney pipe within the combustion air tube,
2. b. Arranging the combustion air tube with the chimney pipe disposed therein within the exhaust duct,
3. c. Pushing together the combustion air tube to connect the chimney pipe with other elements, thereafter
4. d. Pulling apart the combustion air tube to connect the combustion air tube with other elements.

By means of these assembly steps, both the combustion air tube and the chimney pipe arranged therein can be safely and easily mounted inside the exhaust air duct. Due to the variable-length tube for Verbrennungsluftzufiihrung mounting space is created after pushing together so that the fitter can cleanly connect the chimney pipe arranged therein to other elements, such as a chimney tee, a cuff cover or a sleeve. This is particularly important because the chimney pipe and the combustion air pipe is attached to the chimney stacks at least once per floor by means of the double T-pieces.

Further preferred embodiments of the invention will become apparent from the dependent claims.

4. Brief description of the drawing

Fig. 1:

einen schematischen Längsschnitt durch ein erfindungsgemäßes Kaminsystem;

Fig. 2:

einen schematischen Längsschnitt eines Details der Anschlussstelle des Kaminsystems gemäß Fig. 1;

Fig. 3:

einen schematischen Längsschnitt eines Details des unteren Abschlusses des Kaminsystems gemäß Fig. 1; und

Fig. 4:

einen schematischen Längsschnitt eines Details der Mündung des Kaminsystems gemäß Fig. 1.

Hereinafter, preferred embodiments of the invention will be described with reference to the drawings. In which shows:

Fig. 1:

a schematic longitudinal section through an inventive fireplace system;

Fig. 2:

a schematic longitudinal section of a detail of the connection point of the chimney system according to Fig. 1 ;

3:

a schematic longitudinal section of a detail of the lower end of the chimney system according to Fig. 1 ; and

4:

a schematic longitudinal section of a detail of the mouth of the chimney system according to Fig. 1 ,

5. Description of preferred embodiments

In the following, preferred embodiments of the invention will be described with reference to the figures.

FIG. 1 shows an overall view of a chimney system 1, comprising a flue pipe 10 for the removal of combustion gases 12, a combustion air pipe 20 for supplying combustion air 22 to the heaters (not shown) and an exhaust duct 30 for removing room air 32nd Die Figures 2-4 show details of the chimney system 1.

As shown, located within the exhaust duct 30, the combustion air pipe 20. Within the combustion air pipe 20, the chimney pipe 10 is arranged. This can be transported through the chimney system 1, three different media, namely combustion gases 12 from the boilers, which are discharged through the chimney pipe 10 upwards, usually through the roof, in the environment. On the other hand, the combustion air 22 required for combustion of the fuel is supplied via the combustion air pipe 20 to the individual boilers room air independent. Finally, the chimney system 1 also serves to remove used room air 32, which is sucked by means of exhaust fans 40 from the room and discharged via the exhaust duct 30 upwards out of the building. As shown, the room air 32 exits laterally from the exhaust air duct 30 at the upper end of the chimney system 1. The combustion air 32 is sucked in through lateral openings 92 in a chimney closure sleeve 90 in the annular gap between the combustion air pipe 20 and the chimney pipe 10. The combustion gases 12 are removed from the chimney pipe 10 which extends through the chimney closure sleeve 90.

The exhaust duct 30 is preferably made of mineral fireplace stones 34, which may also consist of an already existing in a building fireplace.

In this existing fireplace 34, a combustion air pipe 20 is then retracted with a chimney pipe 10 disposed therein. As the exhaust duct 30 then serves the remaining space between the chimney blocks 34 and the combustion air pipe 20. The combustion air 22 is sucked in the annular gap between the combustion air pipe 20 and chimney pipe 10.

With such an arrangement, the chimney system 1 functions as a countercurrent heat exchanger, with the warm combustion gases 12 passing heat through the chimney pipe 10 to the cold combustion air 22 which flows downwardly to the individual boilers (not shown) in the annular gap between chimney pipe 10 and combustion air pipe 20 , Thus, the combustion air 22 is heated by the heat of the combustion gases 12 and thus their heat is recovered. At the same time, the consumed, generally warm room air 32 is conveyed upwards through the exhaust air duct 30 out of the building or the individual apartments and sweeps past the combustion air pipe 20 on the outside. As a result, the warm room air 32 also gives off heat to the combustion air 22. Thus, the heat of the warm room air 32 is recovered to a large extent.

As in FIG. 1 shown, the fireplace system 1 is designed for multiple occupancy, that is, to the fireplace system 1 more heaters or boilers can be connected. In particular, it is therefore suitable for renovations in multi-storey housing, with an existing brick fireplace 34 can be converted into a fireplace system 1 according to the invention and then a boiler can be connected to the fireplace system 1 on each floor of the building. Furthermore, the chimney system 1 is used for individual ventilation of each connected thereto projectile or each connected apartment and thus ensures a pleasant indoor climate.

Accordingly, the occupants of the individual floors can regulate their heating habits individually and also choose their own ventilation habits.

The chimney pipe 10 is preferably made of an acid-resistant plastic material, preferably polyvinylidene fluoride (PVDF). As in the Figures 1 - 4 shown, the chimney pipe 10 sections of a flexible tube 14. Spacers 16 on the outside of the chimney pipe 10 ensure that the chimney pipe 10 is arranged substantially centrally within the combustion air pipe 20.

The combustion air tube 20 is preferably made of a variable-length tube, preferably made of a variable-length flexible aluminum tube 20. Such tubes are also known by the term "Aluminumflexrohr" and are used in ventilation technology. They are characterized by the fact that they can be laid flexibly and their length can be changed by preferably 100%. Such flexible aluminum tubes can be pulled apart when compared to the collapsed state reach twice the length.

As in FIG. 2 shown in detail, the connection of boilers to the chimney pipe system 1 via connection elements 50, which each have a chimney pipe T-piece 52 and a combustion air pipe T-piece 54. The combustion air tube T-piece 54 surrounds the chimney pipe T-piece 52 and is secured therein. The chimney pipe T-piece 52 is connected to two parts of a chimney pipe 10 and ensures that, from the side, combustion gases 12 can be introduced into the chimney pipe 10. For this purpose, a tubular chimney inlet 60 is connected to a lateral connection of the chimney pipe T-piece 52. Preferably, the chimney inlet 60 to the chimney pipe tee 52 is arranged slightly falling, so that condensate, which may be incurred in the boiler, can flow directly into the chimney pipe 10, which also fills the common siphon on the condensate drain 70 safer and prevents the same.

The combustion air tube tee 54 is interposed between two parts of the combustion air tube 20 and provides a lateral connection for combustion air 22. For this purpose, a combustion air connection pipe 90 which surrounds the chimney introduction 60 is connected to the lateral connection of the combustion air tube T-piece 54. Via the annular gap between the combustion air connection pipe 90 and the chimney inlet 60, the combustion air 22 required for combustion of the fuel in a heater is supplied to the boiler (not shown).

In order to remove used room air 32 from the corresponding building or the apartment, it is blown into the exhaust air duct 30 by means of an electric exhaust fan 40. The delivery rate of the exhaust fan 40 is preferably adjustable, so that the air exchange in the building or in the corresponding apartment can be set individually. In order to prevent contamination of the exhaust fan 40 and the exhaust duct 30, an exhaust filter 42 is connected in front of the exhaust fan 40. The exhaust filter 42 prevents penetration of dust, grease droplets or other contaminants in the exhaust duct 30. Preferably, a filter mat of the filter class F4 is used as an exhaust filter, which should be replaced every six months depending on the pollution.

The exhaust fan 40 is attached to a wall panel 56, which seals an opening in the chimney shaft 30. Preferably, the combustion air connection pipe 90 and the fireplace inlet 60 is also guided through this wall panel, so that only one connection point must be provided for connecting the heating of a dwelling to the chimney system 1. This simplifies the assembly operations for connecting a boiler to the chimney system 1. In particular, a large opening in the exhaust duct 30 is to the chimney system 1, in particular to mount the connection elements within the exhaust duct 30. Thus, only one opening must be provided in the exhaust duct 30 for mounting. In existing old fireplaces, which are used as exhaust duct 30, this only one opening per apartment in the old fireplace 34 must be introduced.

The lowermost chimney tee 52 is connected downwardly to a cuff lid 80 which closes the combustion air tube tee 54 downwardly but at the same time provides a passage for the chimney pipe 10. Through this downwardly extending chimney pipe piece 18 condensate arising in the chimney pipe and also condensate from the connected heaters can collectively run into a condensate drain 70 at the lower end of the chimney pipe 18. From this condensate drain 70 from the condensate is introduced via a condensate line 72 either in a neutralization box for neutralization or directly into the sewer.

The condensate drain 70 is fastened by means of a holder 72 to the exhaust air duct 30 and thus carries the load of the section 18 of the chimney pipe 10 arranged above it. The connection elements 50 are fastened to the chimney block 34 in a similar manner via holders 51. The chimney tee 52 is suitably held in a combustion air tube tee 54. This results in a good attachment of the chimney system 1, wherein occurring thermal stresses are compensated by the flexible design of the chimney pipe 10 and the combustion air pipe 20.

As in FIG. 4 shown, the mouth of the fireplace system above the roof comprises a Kaminabdeckplatte 94, which is placed on an existing fireplace or on the chimneys 34 of the exhaust duct 30 and fixed there. Laterally openings 96 are provided in the exhaust duct 30 below the Kaminabdeckplatte, can be discharged through the room air 32 to the outside. The combustion air tube 20 is connected to a tubular passage 98 in the Kaminabdeckplatte 94, on which a chimney closure sleeve 90 is placed. The chimney pipe 10 penetrates the chimney cowling 90 and is fastened by it. At the same time, the chimney closure sleeve 90 prevents rainwater from entering the combustion air tube 20.

The installation of a chimney system 1 in an existing chimney of chimney blocks 34 will now be described by way of example. First, the existing chimney 34, which later forms the exhaust air duct 30, pried on all floors to receive mounting and passage openings 36. Then, the attachment points are fixed in all floors and the T-shaped connection elements 50 are fastened by means of holders 51 within the exhaust duct 30 on the chimney block 34. For this purpose, a hole is drilled in the chimney 34, a suitable expansion dowel inserted into the hole and the holder 51 is screwed with a fastened thereto screw in the expansion dowel. In the same way, the condensate drain 70 is fixed in the basement of the building within the exhaust duct 30 with a holder 72 on the fireplace block 34. Then a chimney pipe section 18 is introduced into the exhaust air duct 30 and connected to the condensate drain 70 and with a cuff cover 80 which seals the lowermost connecting element 50 down.

To assemble the next floor of the chimney system 1, first a section 14 of the chimney pipe 10 is connected to the lower connection of a chimney pipe tee 52 of the connection element 50 and secured by means of a securing ring. Then, the spacers 16 are fixed to the chimney pipe 10. Subsequently, a portion of a combustion air tube 20 is slid over the chimney pipe 10 and connected and secured to the lower port of the combustion air pipe tee 54. Thereafter, the flexible combustion air pipe 20 is extended to the length of the chimney pipe 10.

The assembly of the connecting element 50 with the pipe sections 10, 20 attached thereto is then introduced down into the exhaust air duct 30. Subsequently, the connection element 50 is fastened by means of holders 51 in the exhaust duct 30 to the chimney block 34. One floor below, the variable-length combustion air pipe is then pushed together and then the chimney pipe 10 arranged therein is connected to the upper connection of the chimney pipe T-piece 52 of the connection element 50 of the lower floor. Subsequently, the combustion air pipe 20 is pulled apart to also connect to the joint member 50 by being connected to the upper port of the lower-tier combustion air pipe tee 54.

In the same way, the installation of the chimney pipe system 1 takes place for further overlying floors.

For mounting the chimney muzzle, the tubular connection piece 98 in the chimney cover plate 94 is connected to a section of the combustion air tube 20. A piece of the chimney pipe 10 is provided with spacers and inserted through the Kaminabdeckplatte in the combustion air pipe 20. Now the combustion air pipe 20 is extended to the length of the chimney pipe 10. Thereafter, the chimney pipe 10 is secured to the Kaminabdeckplatte 94 by means of the Kaminabschlussmuffe 90. Now the Kaminabdeckplatte 94 is inserted with the attached into one another stuck tubes 10, 20 from above into the exhaust duct 30 and secured to the upper mouth of the exhaust duct 30.

One floor deeper then the combustion air pipe 20 is pushed together again to the chimney pipe 10 with the upper terminal of a Chimney Tee 54 to connect. Once this is done, the combustion air tube 20 is pulled apart again and connected to the upper port of the combustion air tube tee 54 and secured.

Thereafter, a chimney introduction pipe 60 is attached to each side port of the chimney pipe tees 52. Likewise, a combustion air inlet tube 90 is plugged onto each side port of the combustion air tube tees 54. In order to close the resulting wall opening 36 with respect to the interior of the building, a wall panel 56 is mounted with a sealed passage for the combustion air connection pipe 90 on the openings 36. On the wall panel 56 and the exhaust fan 40 is attached to the exhaust filter 42, which consumed room air 32 blows through the wall panel 56 into the exhaust duct 30 into it.

Similarly, the opening 36 is closed in the condensate drain 70 with a door 57 through which a condensate line 74 is passed airtight.

Now, the electrical connection of the exhaust fans 40 and the connection of boilers or heaters to the chimney inlet 60 and the combustion air connection pipe 90 can be made.

LIST OF REFERENCE NUMBERS

1

chimney system

10

chimney pipe

12

combustion gases

14

flexible chimney pipe

16

spacer

18

Lower section of the chimney pipe

19

spacer

20

Combustion air pipe

22

combustion air

30

exhaust duct

32

room air

34

Chimney bricks / Altkamin

36

Mounting and feedthrough opening

40

exhaust fan

42

exhaust filter

50

connecting element

51

holder

52

Chimney pipe tee

54

Combustion air pipe tee

56

wall panel

57

door

60

fireplace introduction

70

condensate drain

72

holder

74

condensate line

80

Stulpdeckel

90

Combustion air supply pipe

94

Kaminabdeckplatte

90

Fireplace end bell

92

Openings for combustion air

96

Openings for used room air

98

spigot

Claims (15)

1. Chimney system (1), comprising:

   a. a chimney pipe (10), which is adapted for the discharge of combustion gases (12);

   b. a combustion air pipe (20), which is adapted for the supply of combustion air (22); and

   c. a discharged air channel (30), which is adapted for the discharge of room air (32), wherein

   d. the chimney pipe (10) is arranged inside the combustion air pipe (20),
   characterized in that

   e. the combustion air pipe (20) is arranged inside the discharged air channel (30).
2. Chimney system according to claim 1, wherein the chimney system (1) is designed as a countercurrent heat exchanger, wherein the chimney pipe (10) is adapted in that the warm combustion gases (12) transfer heat through the chimney pipe (10) to the cold combustion air (22) and heat it, wherein in addition the combustion air pipe (20) is adapted in that the warm room air (32) transfers heat through the combustion air pipe (20) to the cold combustion air (22).
3. Chimney system according to one of the claims 1 or 2, wherein the chimney pipe (10) is made of an acid resistant polymer material, preferably of PVDF.
4. Chimney system according to one of the claims 1 to 3, wherein the chimney pipe (10) comprises sections consisting of flexible pipe (14).
5. Chimney system according to one of the claims 1 to 4, wherein the chimney pipe (10) is arranged by means of spacers (16) inside the combustion air pipe (20).
6. Chimney system according to one of the claims 1 to 5, wherein the combustion air pipe (20) comprises sections of a pipe, which is adaptable in its length, preferably of a flexible aluminum pipe, which is adaptable in its length.
7. Chimney system according to one of the claims 1 to 6, wherein the discharged air channel (30) consists of chimney stones (34) made of a mineral material.
8. Chimney system according to one of the claims 1 to 7, furthermore comprising one single condensate drain (70) for the entire chimney system (1), wherein the condensate drain (70) is connected to the lower end of the chimney pipe (10).
9. Chimney system according to one of the claims 1 to 8, furthermore comprising a discharged air fan (40), which blows room air into the discharged air channel (30).
10. Chimney system according to one of the claims 1 to 9, furthermore comprising a connection member (50) for the connection of a heater to the chimney system (1), comprising

    a. a chimney pipe T-piece (52), which is connected to the chimney pipe (10); and

    b. a combustion air pipe T-piece (54), which is connected to the combustion air pipe (20), wherein the combustion air pipe T-piece (54) surrounds the chimney pipe T-piece (52).
11. Chimney system according to claim 10, wherein the lowermost combustion air pipe T-piece (54) and the lowermost chimney pipe T-piece (52) are connected to a slip lid (80), which downwardly seals the combustion air pipe T-piece (54) and provides a passage for the chimney pipe (10).
12. Chimney system according to one of the claims 1 to 11, furthermore comprising a chimney inlet (60), which is connected to a lateral connection of the chimney pipe T-piece (54), as well as a combustion air connection pipe (90), which is connected to a lateral connection of the chimney pipe T-piece (54) and which surrounds the chimney inlet (60).
13. Chimney system according to one of the claims 8 to 12, wherein the chimney system allows multiple occupancy and comprises a plurality of discharged air fans (40) and / or a plurality of connection members (50).
14. Chimney system according to claim 13, furthermore comprising a wall cover (56), which provides a sealed passage for the combustion air connection pipe (90) and simultaneously an airproof connection of the discharged air fan (40) to the discharged air channel (30).
15. Method for the assembly of a chimney system (1), comprising a chimney pipe (10) for the discharge of combustion gases (12), a combustion air pipe (20) comprising sections of a length-adjustable pipe for the supply of combustion air (22), and an discharged air channel (30) for the discharge of room air (32), wherein the method comprises the following steps:

    a. arranging the chimney pipe (10) within the combustion air pipe (20);

    b. arranging the combustion air pipe (20) with the chimney pipe (10) arranged therein within the discharged air channel (30);

    c. contracting the combustion air pipe (20), in order to connect the chimney pipe (10) with further elements; and afterwards

    d. extending the combustion air pipe (20), in order to connect the combustion air pipe (20) with further elements.

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