DE102006017080A1 - Heating boiler has flue connection for discharging exhaust gases designed as waste pipe connection leading into waste water pipe - Google Patents

Abstract

The boiler comprises a burner (1) and burner chamber (2). A flue connection for discharging the exhaust gases is designed as a waste pipe connection connected to the waste water pipes (4). To prevent the build up of smells the waste pipe connection (3) or burner can be closed off from the waste water pipe when the boiler is switched off. The burner can be a fan burner .

Description

The The invention relates to a boiler according to the preamble of the claim 1 and a method for operating this boiler according to claim 5th

A boiler of the type mentioned is, for example, after EP 1 411 306 A1 known. Such a boiler consists of a burner with a combustion chamber for combustion of a fuel. As a fuel, for example, gas, oil or a solid such as wood into consideration. During the combustion of the fuel, an exhaust gas is produced, which is conveyed in the heating boilers considered here with a blower to an exhaust connection arranged on the combustion chamber. The blower is regularly part of the burner, so it comes, for example, a gas or Ölgebläsebrenner for use. It is essential that an overpressure is created by the blower in the combustion chamber, with which the exhaust gas is supplied to the exhaust port.

At closes the exhaust connection in the known state of the art a chimney or exhaust pipe. This pipe in turn is directly connected to the environment of the building, in which the boiler is installed, d. H. the exhaust gas gets out the combustion chamber through a chimney carried outside.

In In recent decades, it has always been ensured that the temperature of the exhaust gas as possible is low (about 80 ° C), as this directly affects the overall efficiency of the boiler. Low Exhaust gas temperatures lead but also regularly to condense out parts of the exhaust gas. Depending on the fuel the resulting condensate can be acidic, so that or, if necessary, even neutralization devices (usually with oil burners) to be provided.

The condensate accumulating in the gas fired value boilers (which are particularly considered here), which are frequently used as wall-mounted appliances, can simply be fed directly to the sewerage system of the installation building. The exhaust port of the boiler is thus connected in this case with a chimney pipe, which in turn on the one hand leads the exhaust gas into the open and on the other hand has a connection to a wastewater connection. The gaseous part of the combustion residues is thus discharged outside the building, the liquid part into the sewer (regularly with the interposition of a siphon to avoid odors - see the above EP 1 411 306 A1 ).

These solution has proven itself in the best way; this also from the point of view that thus a comparatively Low-emission heat generation possible is.

Of the Invention is based on the object, starting from a boiler of the aforementioned type, the exhaust gas discharge to improve even further or in particular to simplify.

These The task becomes objective with a boiler of the type mentioned by the in the license plate of patent claim 1 listed Characteristics solved. Procedurally solve the features the mark of claim 5 this task.

To The invention is therefore intended that the exhaust port for discharging the Exhaust gas formed as a sewer exhaust port and is connected to a sewer or that at the Combustion resulting exhaust over the exhaust port formed as a sewerage exhaust port fed to a sewer becomes.

With in other words, is according to the invention, the exhaust no longer to the environment of building but delivered directly to the sewer. One Fireplace or the like can be omitted, hence the associated constructive and financial effort.

requirement for the Invention is that the exhaust gas has cooled sufficiently before it is fed to the sewer becomes. However, this is certainly the case with the above-mentioned condensing boilers the case or can also in other boilers by appropriate measures (for Example additional Nachschaltwärmetauscher) guaranteed become.

The sufficiently cold exhaust gas is thus inventively blower pressure from the exhaust port directly out regularly Plastic pipes supplied to existing sewer. Because beyond that the condensate or acid for plastic pipes occurring in condensing boilers is not a problem, there are actually no difficulties at the discharge on this inventive way.

• – Infolge des permanenten Durchströmens des Abwassersystems mit relativ warmen Abgasen verringert sich die Gefahr von Fettablagerungen an der Innenseite der Rohre.
• – Eine Neutralisationseinrichtung ist überflüssig, da im Abwassersystem dies ohnehin mit den im Haus anfallenden Reinigungsmitteln erfolgt.
• – Schädlinge, die sich regelmäßig im Abwassersystem aufhalten, werden durch das Abgas absehbar vertrieben.
• – Probleme, wie Vereisungen an Dachdurchführungen bei Abgassystemen, entfallen.
• – Aus dem Abwasserkanal aufsteigende Wärme wird indirekt wieder ans Gebäude abgegeben, d. h. die erfindungsgemäße Lösung führt (wenn auch zu einer geringen) Gesamtwirkungsgradsteigerung.
• – Thermoakustische Probleme infolge Resonanzfrequenzen im Abgasrohr entfallen.

In addition to the task of simplifying the exhaust system, the solution according to the invention also has the following advantages:

• - Due to the permanent flow through the sewage system with relatively warm exhaust gases, the risk of fat deposits is reduced on the inside of the pipes.
• - A neutralization is superfluous, since in the sewage system this is done anyway with the costs incurred in the house cleaning agents.
• - Pests that are regularly in the sewage system are foreseeably distributed by the exhaust.
• - Problems, such as icing on roof penetrations in exhaust systems eliminated.
• - Heat rising from the sewer is indirectly returned to the building, ie the solution according to the invention leads (albeit to a lesser degree) to an overall increase in efficiency.
• - Thermoacoustic problems due to resonance frequencies in the exhaust pipe omitted.

Other advantageous developments of the boiler according to the invention arise from the dependent ones Claims.

Of the Heating boiler according to the invention including its advantageous developments according to the dependent claims below with reference to the drawing of a preferred embodiment explained in more detail.

It shows

1 in section, the boiler according to the invention with wastewater sewer connection.

In the only one 1 a preferred embodiment of the boiler according to the invention is shown in a mounting situation. This consists of a burner 1 with a combustion chamber 2 for combustion of a fuel, wherein an exhaust gas is formed and wherein the combustion chamber 2 an exhaust connection 3 For fan-assisted removal of the exhaust gas has. As a burner 1 is in this wall-mounted, designed as a so-called condensing boiler embodiment provided a known gas blower burner.

Essential for the boiler according to the invention is now, and this applies to all embodiments, that the exhaust port 3 for the discharge of the exhaust gas formed as a sewerage exhaust connection and with a sewer 4 is connected or that the resulting during combustion exhaust gas via the formed as Abwasserkanalisationsabgasanschluss exhaust port 3 a sewer 4 is supplied.

As in 1 shown schematically, the exhaust gas thus flows from the exhaust port 3 over a connecting pipe 5 to a pipe of sewerage 4 , Due to the condensing technology, the exhaust gas temperatures are so low that the exhaust gas can be fed to the sewage system without further intermediate cooling. The flow through the connecting pipe against gravity is ensured by the blower on the burner.

An outflow of the exhaust gas, for example via the in 1 illustrated sink drain 6 is also excluded, since the sink a siphon 7 is provided and the pressure generated by the fan burner at any time will be sufficient to overcome this water barrier. Of course, this also applies to all other water drains in a building, as these are always provided with a siphon to prevent unpleasant odors.

How out 1 can be seen, is between the exhaust port 3 and sewerage 4 of course and unlike the above EP 1 411 306 A1 no siphon is provided, otherwise the exhaust gas could not escape. The connection between exhaust connection 3 and sewerage 4 is thus siphon free.

Since this could lead to odor nuisance at a standstill of the boiler is in the preferred embodiment after 1 provided that optionally the exhaust port 3 or the burner 1 is formed closable. A corresponding boiler control thus ultimately monitors the pressure in the combustion chamber and closes the connection to the sewer, if the burner does not provide excess pressure for the combustion chamber, ie a return flow from the connecting pipe 5 is to be feared.

1

burner

2

combustion chamber

3

exhaust port

4

sewerage

5

connecting pipe

6

sink drain

7

siphon

Claims (6)

Heating boiler, comprising a burner ( 1 ) with a combustion chamber ( 2 ) for combustion of a fuel, wherein an exhaust gas is formed and wherein the combustion chamber ( 2 ) an exhaust connection ( 3 ) for fan-assisted removal of the exhaust gas, characterized in that the exhaust connection ( 3 ) designed for the discharge of the exhaust gas as a sewerage exhaust connection and with a sewer ( 4 ) connected is. Heating boiler according to claim 1, characterized in that optionally the exhaust gas connection ( 3 ) or the burner ( 1 ) to avoid odor nuisance from the sewage system ( 4 ) is formed closable at standstill of the boiler. Heating boiler according to claim 1 or 2, characterized in that between the exhaust port ( 3 ) and sewerage ( 4 ) a connecting pipe connecting them ( 5 ) arranged. Heating boiler according to one of claims 1 to 3, characterized in that the burner ( 1 ) is designed as a fan burner. Heating boiler according to one of claims 1 to 4, characterized that this as a condensing boiler with low exhaust gas temperatures is trained. Method for operating a heating boiler according to claim 1, characterized in that the exhaust gas formed during the combustion via the exhaust port formed as sewerage exhaust gas connection ( 3 ) of a sewer ( 4 ) is supplied.