DE8802425U1 - Exhaust system for the exhaust gases of a burner - Google Patents

Description

Joti. Vailiant GmbH u. Co

GM653

26.2.1988

Exhaust system for the exhaust gases of a burner

The present invention relates to an exhaust gas duct which extends into the atmosphere and is surrounded by a combustion air duct for the exhaust gases of a burner of a gas-fired device which is fed with combustion air in countercurrent to these exhaust gases, wherein a return of the condensate arising from the exhaust gases into the exhaust gas duct up to its mouth is provided.

Such an exhaust gas routing is shown in DE-A 35 20 130, whereby the condensate is led back on the underside of the exhaust pipe due to its inclination and is intercepted through an opening at the device-side end of the exhaust pipe leading through the wall and is fed via a separate line to the sewage system of the building in which the gas-heated boiler is installed.

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From IP-A 30 364 it has become known that a condensation device works as a «tinted» fuel burner, whereby the condensate produced is also discharged directly from the furnace into the waste water system of the furnace.

The disadvantage of this known design is that a separate drainage line leading to the drainage system of the house must always be present or one must be installed when the device is installed.

! The present invention is based on the object of achieving this

! sales expenses and for an immediate condensate

: drove to torgen.

j The solution to the problem according to the invention is that the

! Condensate drain In the vacuum area of the burner heated

' Gerltet. This measure ensures that

j a condensate with the help of the pressure difference det

: The condensate is conveyed from the condensate drain and brought to an area where it evaporates due to the heat from the burner. If the device is in operation long enough, the condensation of the moisture-saturated exhaust gases no longer has an effect on the exhaust gas duct, so that the exhaust gases, together with the moisture, can be carried outside without condensation.

In an embodiment of the invention, it is proposed that the condensate duct ends in the exhaust hood, preferably above a condensate chamber. This allows the burner exhaust heat to have a good influence on the condensate, its contents and on the condensate collector, so that the condensate that has accumulated can be easily evaporated if the device is only operated long enough.

An embodiment of the subject matter of the invention is illustrated in the drawing.

01· Figure shows a schematic representation of a gas mass heater· with structural NS equilibria for the drainage of the condensate.

A gas-heated furnace has an exhaust gas collection hood 22 which closes off a combustion chamber 23 at the top. A heat exchanger 25 of the heating device is arranged within the walls of the heating shaft 24 of this combustion chamber, which extends above a burner 26. A flexible hose 21 is inserted into the exhaust gas collection hood 22, which generates negative pressure within the hood and positive pressure in an exhaust gas duct 1. The exhaust gas duct 1 is provided with an annular aperture 2 at its end which opens into the atmosphere and is surrounded by an air duct 3 along its entire length.

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A condensate drain line 20 is provided on the underside of the exhaust duct, the outlet on the device side of which is located inside the exhaust hood 22. When the structure 21 generates negative pressure inside the hood and positive pressure inside the exhaust duct, the fan supports the return of the condensate. A condensate collector 28 is assigned to the end of the condensate drain line, from which excess condensate can flow via a drain line 29 if evaporation and discharge of the condensate into the atmosphere is not successful.

During the combustion of the device, exhaust gas is generated from fresh air and gas, which is used to heat the heat exchanger 25 and which is sucked in by the fan 21 and fed into the exhaust gas discharge line. Particularly at the start of combustion, hot water condenses out of the exhaust gas and is brought via the condensate discharge line 20 into the interior of the exhaust gas collection hood 22 and collected in the condensate collector 28. It is then exposed to the hot burner exhaust gases, so that the condensate evaporates again and is discharged. This is possible if the burner runs for a sufficiently long time. However, with extremely short burner running times and low temperatures of the medium to be heated, excess condensate can occur, only this is removed via the drain line η .

Claims (2)

Joh. Vaillant GmbH u. Co GM 653 26.2.1988 Claims 1. Exhaust gas duct, which ends in the atmosphere and is separate from a combustion air duct, for the exhaust gases of a burner of a gas-heated device which is fed with combustion air in countercurrent to these exhaust gases, with a return of the condensate arising from the exhaust gases in the exhaust gas duct up to its mouth, characterized in that the condensate is guided in a separate line (20) running directly to the exhaust pipe (1) and that this line opens into a negative pressure region of the device heated by the burner (26). 2. Exhaust gas duct according to claim 1 for a burner, which is assigned an exhaust gas collection hood and a fan conveying the exhaust gases and the combustion air, characterized in that the condensate drain line (20) ends in the exhaust gas collection hood (22), preferably above a condensate drain (28).