BE1024629A1 - COMBINATION AIR SUPPLY-COMBUSTION GAS EXHAUST SYSTEM FOR GAS FIREPLACES - Google Patents

Abstract

This invention relates to a combination air supply - flue gas discharge system (1) for a building, in particular an apartment building, comprising at least one heating installation (2) in the form of a gas fire and a pipe system comprising at least two concentric pipes (3, 4), wherein the first inner tube (3) is provided for flue gas discharge from a heating installation (2) and the second tube (4) is provided for air supply to a heating installation (2), the tube system comprising a third concentric tube (5) provided between the first (3) and second (4) tube, wherein the space between the first (3) and the third (5) tube is at least partially filled with an insulating material (6).

Description

(30) Priority data:

(71) Applicant (s):

DEBATRA BVBA 9840, DE PINTE Belgium (72) Inventor (s):

THE BAENST Karl 9840 DE PINTE Belgium (54) COMBINATION AIR SUPPLY-COMBUSTION GAS EXHAUST SYSTEM FOR GAS FIREPLACES (57) This invention relates to a combination air supply - combustion gas exhaust system (1) for a building, in particular an apartment building, comprising at least one heating installation (2) in in the form of a gas fire and a pipe system comprising at least two concentric pipes (3, 4), the first inner pipe (3) being provided for flue gas discharge from a heating installation (2) and the second pipe (4) being provided for air supply to a heating installation (2), the pipe system comprising a third concentric pipe (5) provided between the first (3) and second (4) pipe, the space between the first (3) and the third (5) pipe at least partially is filled with an insulation material (6).

Fig. 1

BE2016 / 5747

COMBINATION AIR SUPPLY-COMBUSTION GAS EXTRACTION

SYSTEM FOR GAS FIREPLACES

This invention relates to a combination air supply - flue gas discharge system for a building, comprising at least one heating installation and a pipe system comprising at least two concentric pipes, the first inner pipe being provided for flue gas discharge from a heating installation and the second pipe being provided for air supply to a heating installation. This invention particularly relates to a combination air supply flue gas discharge system for an apartment building to which gas fireplaces can be connected.

A combination of air supply - flue gas discharge, a so-called CLV system for buildings, is known. It is a chimney system for stacked housing (apartments) to which several closed central heating boilers can be connected. Use is made of a tube-in-tube system (concentric) where the inner tube functions as a flue gas outlet and the outer tube serves as an air supply. It is a static unit where the good flow is made by the principle of rising heat and the forced discharge of the fans built into the boilers themselves.

An extension to such a CLV system is described in Belgian patent BE 1 019 666. This patent publication describes a building with an integrated pipe system with three concentric pipes, in which the first (inner) pipe serves for flue gas discharge from a heating installation of the building, the second pipe for air supply to the heating system and the third pipe for the ventilation air exhaust from the building, and closed with an exhaust module that optimally separates the streams.

The known CLV systems have been developed for modern boilers, where the inner tube never gets warmer than 120 ° C due to the flue gases (combustion gases).

BE2016 / 5747 so that the temperature of the outer tube can also reach a maximum of 50 ° C.

The central (inner) tube is often made of plastic to withstand the acid condensate of the combustion gases.

In recent years, more and more people are going to install a hermetically sealed heating appliance in their home with gas as fuel. Such appliances are known in the market as closed combustion appliances (English / "balanced flu"; French: "circuit étanche"). These appliances have a closed combustion chamber to which a centrally placed exhaust pipe (channel, pipe) for the combustion gases and around a concentrically running supply pipe for the supply of combustion air in the combustion chamber are connected. The discharge of the combustion gases and the supply of air are controlled via a special end piece.

Connecting gas fires to the currently known CLV system of apartment buildings is not possible for the following reasons:

The temperature of the combustion gases at a gas fire can reach 250 to 300 ° C. Namely, there is an enormous heat exchange between the central channel and the annular channel around it. The combustion gases The combustion gases in the central duct will in principle cool down to 150 ° C in long ducts, but the supply air in the duct around it will heat up to 150 ° C.

This entails the following problems:

a) many other pipes and cables that cannot withstand this high temperature run in the technical duct in which the CLV is mounted;

b) the supply air in the gas fire is also too hot, which causes the combustion gases to become even more warm and thus further aggravate the problem;

c) the outer of connecting pipes in the apartment also get too hot.

BE2016 / 5747

For this reason, it is currently mandatory to install an individual set of concentric pipes for the supply and discharge of the gases to and from the roof in apartment buildings, per gas fire. Which takes up too much space and is therefore almost never used.

The present invention aims at providing a CLV system for a building, in particular an apartment building, to which one or more gas fireplaces can be connected.

The object of the invention is achieved by providing a combination air supply - flue gas discharge system for a building, comprising at least one heating installation and a pipe system comprising at least two concentric pipes, the first inner pipe being provided for flue gas discharge of a heating installation and the second pipe provided for air supply to a heating installation, said heating installation being a closed-type gas fire and wherein the pipe system comprises a third concentric pipe provided between the first and second pipes, the space between the first and third pipes being at least partly is filled with an insulation material. Preferably, said space is completely filled with an insulating material. The insulation material is preferably heat resistant.

By implementing the three-walled CLV system in this way, the exchange of heat is reduced to a fraction, so that the outer jacket (jacket of the second tube) remains relatively cool (maximum 60 ° C). Because the jacket remains cool, this tube can be placed without any problem in the vicinity of other materials.

In a preferred embodiment of the combination air supply flue gas discharge system according to the invention, the said insulating material is rock wool or ceramic fibers.

In a more preferred embodiment of the combination air supply flue gas discharge system according to the invention, the first, second and third pipes are made of stainless steel. Other types of metal such as aluminum or galvanized steel are also possible.

According to a special embodiment of the combination air supply flue gas discharge system according to the invention, the pipe system further comprises a fourth concentric pipe for extracting ventilation air, which is provided around the second pipe.

BE2016 / 5747

In an advantageous embodiment of the combination air supply flue gas discharge system according to the invention, said system comprises a fan device for discharging the combustion gases.

To further clarify the features of this invention and to indicate additional advantages and details thereof, a more detailed description of the CLV system according to the invention follows. It is to be understood that nothing in the description below can be interpreted as limiting the claims claimed in the claims for this invention.

In this description reference is made by reference numerals to the accompanying drawings, in which:

figure 1: a schematic representation of a combination air supply flue gas discharge system for a building to which two gas fires are connected;

Figures 2 and 3: a perspective representation of two embodiments of the pipe system according to the invention;

figure 4: is a schematic representation of the placement of the fan arrangement.

BE2016 / 5747

This invention relates to a combination air supply flue gas discharge system (1) (CLV system) for a building, in particular an apartment building to which a number of heating installations (2) can be connected. The system (1) according to the invention is shown in figure 1 and also comprises a pipe system with at least two concentric pipes (3, 4), the first inner pipe (3) being provided for flue gas discharge from a heating installation (2) and the second pipe (4) is provided for air supply to a heating system (2).

The heating installations (2) that can be connected to the CLV system are gas fireplaces of the closed or hermetic type. With a closed system, the gas fire has a double-walled system. The outer tube (4) draws in fresh air (combustion air), while the inner tube (3) will exhaust the combustion gases. The fresh (combustion) air is introduced at the bottom of the combustion chamber.

As shown in figure 1, a CLV system has a central tube (pipe) to which the pipes from the different heating installations (2) are connected.

The invention consists in insulating the central pipe (3) with heat-resistant material, usually rock wool or ceramic fibers. This reduces the exchange of heat to a fraction, keeping the outer jacket cool.

Because the jacket remains cool, the CLV pipe can be placed 5 cm away from any material. For practical reasons, a (third) tube (5) is placed around the insulation material (6). Thus, the CLV system is usually three-walled three stainless steel pipes around each other. Other types of metal such as aluminum or galvanized steel are also possible.

BE2016 / 5747

The tubes are standard circular. However, it goes without saying that other shapes such as e.g. square, hexagonal, polygonal, ellipse or other shapes are also within the scope of this invention.

The diameters of the pipes depend on the number of gas fires (2) to be connected and their capacity. A practical size is 130/180/250 mm for the first (3), third (5) and second (4) pipe respectively, with insulation (6) of 25 mm thick between the pipe of 130 and 180 mm. Such dimensions allow to connect six large fireplaces.

A four-tube version (not shown), in which an additional tube for ventilation is thus arranged around the three tubes, is also covered by this invention.

A modern CLV installation (1) works in overpressure, so with appliances that blow the 15 combustion gases into the central pipe. Because the appliances are hermetically closed, a suction effect is created in the outer tube (4) that supplies the air for combustion. An anti-non-return valve prevents blowing in devices that are not in service at the time. All this is electronically controlled and secured according to the applicable standards.

The above also happens in the intended establishment with gas fireplaces. The pressure in the pipes activates a pressure switch and controls the electronics, a dial allows the installer to read the pressure and a frequency controller controls the speed of the fan motor (7), which allows it to be adapted to the device. The whole has an extra gas shut-off valve so that a fire can only be made if everything is in order. Variations are possible on this method and system and can be regulated, for example, on the air excess of the combustion.

Claims (6)

CONCLUSIONS BE2016 / 5747 A combination air supply - flue gas discharge system (1) for a building, comprising at least one heating installation (2) and a pipe system comprising at least two concentric pipes (3, 4), the first inner pipe (3) being provided for flue gas discharge heating installation (2) and the second pipe (4) is provided for air supply to a heating installation (2), characterized in that said heating installation (2) is a closed type gas fire and that the pipe system is a third concentric pipe (5) provided between the first (3) and second (4) pipe, the space between the first (3) and the third (5) pipe being at least partially filled with an insulating material (6). Air supply - flue gas discharge system (1) combination according to claim 1, characterized in that said insulating material (6) is heat resistant. Air supply - combustion gas discharge system (1) combination according to claim 1 or 2, characterized in that said insulating material (6) is rock wool or ceramic fibers. Air supply - flue gas discharge system (1) combination according to one of the preceding claims, characterized in that the first (3), second (4) and third (5) pipes are made of stainless steel. Air supply - flue gas discharge system (1) combination according to one of the preceding claims, characterized in that the pipe system further comprises a fourth concentric pipe for extracting ventilation air, and which is provided around the second pipe (4). BE2016 / 5747 Air supply - flue gas discharge system (1) combination according to one of the preceding claims, characterized in that said system (1) comprises a fan device (7) for discharging the combustion gases. BE2016 / 5747