EP2088375A1 - Cheminee fire place - Google Patents

Abstract

The firing device has a tubular hollow body (7) as a burning element, and provided with a slot (7') in an external wall. The slot is formed parallel to a longitudinal axis of the hollow body. A conveying screw is arranged along a longitudinal axis of the slot. A feed pipe (8) and a dissipating pipe (9) are led into the hollow body in regions of respective sides of the conveying screw. The hollow body is formed as a straight sheet iron pipe. The conveying screw is connected with a drive e.g. electric motor (10). An independent claim is also included for a chimney with a combustion chamber comprising a firing device.

Description

The present invention relates to a firing device for Cheminées and Cheminées with such firing devices.

Cheminées are usually operated with wood as a fuel and conventionally have a combustion chamber with feed opening, partly a grate and an arranged above the combustion chamber fume hood, which serves in a chimney for the withdrawal of the combustion gases.

The grate serves to receive the fuel, for example in the form of logs, and usually a container for collecting the combustion ash is arranged below the grate. The feed opening remains in operation either completely open and thus gives a visually appealing fireplace, or it is completely closed, for example by a transparent door and thus provides a defined, constant environment for combustion, the visual impression of the fire is maintained.

In the latter case, the fire can be kept relatively small and still efficiently heated, for example, a convection heating system. In addition, the space around the fireplace in front of the fire-flying radio parts is completely protected, so there is no fire hazard to the environment.

The covering of the combustion chamber can also be done by other means, for example by attaching gratings or Metal fabrics, which also prevent the coarse sparking, but in addition to the optical and the acoustic element of the open fire in the furnace receive.

Newer technologies also provide for the use of, for example, gas burners in the combustion chamber of such cheminées, be it as an alternative to open wood fire. The advantage of these technologies is that the flame image is controlled by controlling the supply of the respective fuels, i. of gas, and can be kept constant over virtually any time periods, which is not the case with open wood fire. There must be manually recharged each new wood before the complete burn-up, in order to obtain the fire over a longer period of time.

The object of the present invention was to find a fireplace, which gives the visual impression of an open fire, is easy to operate automatically or independently over a longer or defined period and can be charged with renewable energy resources.

This object is achieved according to the invention by a firing device having the features of claim 1. Further embodiments according to the invention emerge from the features of further claims 2 to 9.

The firing device for operating an open or closed hearth has according to the invention as a fuel element a tubular hollow body which has at least one slot in its outer wall and in which along its longitudinal axis a screw conveyor is arranged, wherein in the region of one side of the screw conveyor, a feed pipe opens into the hollow body and in the region of the other side of the screw conveyor, a discharge pipe opens into the hollow body. Through the feed pipe solid fuel, for example in the form of wood pellets, the screw conveyor can be supplied. The screw conveyor then conveys this fuel along the longitudinal axis of the hollow body in the direction of the discharge pipe. The fuel is transported along the slot and is ignited there. The flame can escape from the slot to the outside and visually indicates the combustion by flame formation. The fuel burns while on the way along the slot, whereby the flame pattern moves along the slot until the fuel is burned out. The burnup, usually the remaining ashes of the fuel, is transported by the screw conveyor to the discharge pipe. There, the burn-up from the hollow body is conducted, for example, into an ash collecting container for later emptying.

The ignition of the fuel can be done manually or for example by an automatic ignition device arranged in the initial region of the slot. Thus, the burning process can be started automatically. The fire may be interrupted by stopping the auger or by interrupting the supply of fuel at the end of the feed tube. The fuel still in the area of the slot will burn off completely and then extinguish the fire.

The flame pattern can be adjusted by appropriate dimensioning and arrangement of the one or more slots in a certain frame and visually gives the impression of an open fire.

For example, the slot is formed parallel to the longitudinal axis of the hollow body and preferably at the beginning resp. formed round or pointed at the end. It has been shown that so that a visually appealing fire pattern can be achieved and the start of combustion and the burning end of the fuel is optimal.

For example, the slot in the cross section of the hollow body spans an opening angle between 10 ° and 180 °. The opening angle defines the relative width of the slot with respect to the diameter of the hollow body. For a wide flame pattern, a larger opening angle is defined, for a narrower flame pattern a smaller opening angle. With a larger opening angle, the supply of combustion air to the hearth is greater and the flame pattern becomes more irregular but natural.

For example, the hollow body is provided in the region of the slot with a sliding diaphragm, which allows to adjust the opening angle, if necessary, by corresponding displacement of the diaphragm, i. to enlarge or reduce.

For example, the hollow body is designed as a straight metal tube with a small wall thickness. Such a tube can be easily and inexpensively manufactured and allows, simply concentric to the longitudinal axis of a screw conveyor install, which has little play on the inner wall or touches them.

For example, the screw conveyor is connected directly to a controllable drive, preferably with an electric motor. Thus, the screw conveyor can be operated automatically with constant, variable or adjustable conveying speed. The drive is for example coupled directly to one end of the axis or shaft of the screw conveyor. Since this point is not in the immediate vicinity of the hearth, for example, a commercially available electric motor can be used for this purpose.

For example, the feed pipe opens directly in the installed state of the firing device directly or laterally from above into the hollow body in the region of the beginning of the screw conveyor. If, for example, pressed wood elements such as, for example, wood pellets are used as the fuel, they can simply be guided from the reservoir to the hollow body via the feed pipe, without the need for an additional, active conveying means.

For example, the discharge pipe opens in the region of the end of the screw conveyor in the installed state of the firing device directly or laterally from below into the hollow body. Thus, the subsidized by the screw conveyor to its end burn, usually the remaining of the combustion ash of the fuel through the drain pipe without additional transport elements in one Sump to be removed, the resp. can be emptied when it reaches its maximum level.

For example, the hollow body consists of three rotatable and / or slidably interconnected pipe sections. Thus, the positions and relative angles of the feed pipe and / or the discharge pipe with respect to the central portion of the hollow body for installation in a fireplace can be easily adjusted.

For example, the hollow body has, at least in regions, small openings or mesh-slotted slots radially opposite the slot. Through these openings or slots, for example, additional combustion air can be blown or bring in the corresponding section of the screw conveyor to improve the combustion in this area. The openings resp. the mesh size of the mesh is chosen so small that the fuel can not fall through even in teilverbranntem state, but still an air supply in the screw conveyor and thus the fuel can be done.

Furthermore, according to the invention, a fireplace with a firebox, flue and furnace opening is proposed, in which a firing device according to one of claims 1 to 9 is arranged, wherein at least the region of the hollow body with the slot is arranged in the region of the bottom of the firebox. The region of the hollow body with the slot forms the firing part of the firing device and is therefore arranged in the firebox. The beginning and the End of the hollow body can thereby be led out of the actual firebox of the fireplace, either completely laterally out of the fireplace cabinet or in separate, lateral spaces within the fireplace enclosure itself.

For example, at least one air supply is arranged below the combustion chamber in the region of the middle of the hollow body, preferably an air supply equipped with a fan. The air supply supports the combustion behavior of the fuel in the firing device resp. inside the screw conveyor. By one or more additional fans, the supply of combustion air can be supported.

For example, a heating element is arranged in the region of the firebox, which is arranged, for example, with respect to the firebox opening vertically to the bottom of the firebox. Thus, the fireplace can be used for heating, for example, of water, which flows through a pipe system formed in the heating element.

It will be apparent to those skilled in the art that the fireplace may be any conventional type of fireplace, in which the heater can be planned and installed from the beginning. The inventive firing device is also well suited for installation in fireplace inserts, which include the entire firebox as a finished element and may additionally have heating means for space heating.

• Fig. 1 schematisch die Vorderansicht eines erfindungsgemässen Cheminées mit einer erfindungsgemässen Feuerungseinrichtung;
• Fig. 2 schematisch die Aufsicht auf die Feuerungseinrichtung des Cheminées nach Figur 1;
• Fig. 3 schematisch den Querschnitt durch den Hohlkörper der Feuerungseinrichtung nach Figur 2;
• Fig. 4 die schematische Ansicht eines dreiteiligen Hohlkörpers;
• Fig. 5 die schematische Ansicht der Förderschnecke 12.

Embodiments of the present invention will be explained in more detail below with reference to figures. Show it

• Fig. 1 schematically the front view of a novel cheminée with a novel firing device;
• Fig. 2 schematically the supervision of the firing device of the Cheminées FIG. 1 ;
• Fig. 3 schematically the cross section through the hollow body of the firing device according to FIG. 2 ;
• Fig. 4 the schematic view of a three-piece hollow body;
• Fig. 5 the schematic view of the screw conveyor 12th

In FIG. 1 schematically shows the front view of a cheminée equipped according to the invention. In the main body 1 of the fireplace central combustion chamber 2 is arranged, which is closed in the example shown at the front by a sliding or pivoting glass cover 3. Above the combustion chamber 2, a flue with a fireplace 4 is arranged, through which the flue gases developed by the fire 5 are dissipated.

Below the combustion chamber 2, a fan 6 is arranged, which has a fan for active ventilation of the combustion chamber 2 with combustion air. In this case, for example via slider (not shown), the amount of air supply regulated resp. be set.

A tubular hollow body 7 spans the bottom region of the combustion chamber 2 and projects in the example shown on both sides of the main body 1 from the fireplace.

In the region of the left end of the hollow body 7, a feed pipe 8 is arranged, which opens obliquely from above into the hollow body 7. In the region of the right end of the hollow body 7, a discharge pipe 9 is arranged, which is formed projecting obliquely downward from the hollow body 7.

At the left end of the Hohlköpers 7, a motor 10 is flanged, which arranged within the hollow body 7 screw conveyor (in FIG. 1 not shown) drives and rotated. The axis of this screw conveyor is mounted at the right end in the bearing body 11 and connected at the left end directly to the output flange of the motor 10.

If fuel is supplied to the hollow body 7 in the form of, for example, wood pellets via the feed tube 8, they are continuously transported from left to right inside the hollow body by rotation of the screw conveyor and can be ignited in the region of the opening slot 7 'of the hollow body 7 and form a Fire 5 burn down.

The burnup resp. Ashes of the fuel is transported by the screw to the right to the discharge pipe 9, where it falls down, for example, in a arranged at the end of the discharge pipe 9 collecting container (not shown). On the transport path between the right end of the slot 7 'and the discharge pipe 9 is the Ashes also cooled already, so that in the collection virtually no fire danger.

Due to the closed bottom shape of the hollow body 7 also a clean fire is provided in the combustion chamber 2, which leaves no fuel components in the furnace 2. Also, the risk of flying sparks compared to an open log fire is substantially reduced if not completely prevented.

Nevertheless, the fire 5 visually offers a similar effect as a conventional wood fire.

In FIG. 2 is still purely schematically the plan view of a cross section of the combustion chamber 2 above the hollow body 7 shown. From this, in particular the design and shape of the slot 7 'of the hollow body 7 made clear.

The slot 7 'is here formed, for example, at the left beginning and at the right end tapering, which in this area to a smaller resp. less high flame leads and prevents the fire unintentionally further to the left resp. spreads right into the hollow body 7.

Further, in this figure, the top view of the screw conveyor 12 can be seen, which promotes the fuel from left to right on their helical surface.

On the rear wall of the combustion chamber 2, for example, a heating element 14 is arranged, in which a pipe system is formed for heating water. Thus, the fireplace can also be used as a heating system, for example for hot water.

In FIG. 3 the cross section through the hollow body 7 is shown in a region of the slot 7 '. The slot 7 'spans here, for example, an arc segment with the angle α of about 120 °. Thus, vertically rising flames of the fire 5 over a portion of the diameter of the screw conveyor 12 are formed, derived from the fuel, which is present for example in the form of wood pellets 13.

In FIG. 4 is purely schematically the view of a three segments 7a, 7b, 7c constructed hollow body 7 shown, each consisting of circular cylindrical metal tubes, which pushed into each other, respectively. are plugged. In this case, the individual tube segments 7a, 7b and 7c can be moved against each other during assembly and rotated relative to each other.

In FIG. 5 schematically the view of a screw conveyor 12 with its helical conveying surface 12 'is shown. On the left side in the direction of arrow Z fuel elements in solid form, such as wood pellets, are supplied, which are transported via the conveying surface 12 'upon rotation of the screw conveyor in the clockwise direction in the direction of arrow t to the right. The wood pellets, resp. whose ash residues after a firing in the central region of the screw conveyor 12 can be removed at the right end in the direction of arrow A from the screw conveyor 12, respectively. fall down by itself.

Claims (12)

Firing device for operating an open or closed hearth, characterized in that it has as a fuel element a tubular hollow body (7) which has in its outer wall at least one slot (7 ') and in which along its longitudinal axis a screw conveyor (12) is arranged, wherein in the region of one side of the screw conveyor (12) a feed pipe (8) opens into the hollow body (7) and in the region of the other side of the screw conveyor (12) a discharge pipe (9) opens into the hollow body (7). Firing device according to claim 1, characterized in that the slot (7 ') is formed parallel to the longitudinal axis of the hollow body (7) and preferably at the beginning resp. is formed round or pointed at the end. Firing device according to claim 2, characterized in that the slot (7) in the cross section of the hollow body (7) spans an opening angle between 10 ° and 180 °. Firing device according to one of claims 1 to 3, characterized in that the hollow body (7) is designed as a straight metal tube with a small wall thickness. Firing device according to one of claims 1 to 4, characterized in that the screw conveyor (12) is connected directly to a controllable drive (10), preferably with an electric motor. Firing device according to one of claims 1 to 5, characterized in that the feed pipe (8) directly in the region of the beginning of the screw conveyor (12) in the installed state of the firing device opens directly or laterally from above into the hollow body (7). Firing device according to one of claims 1 to 6, characterized in that the discharge pipe (9) in the region of the end of the screw conveyor (12) in the installed state of the firing device opens directly or laterally from below into the hollow body (7). Firing device according to one of claims 1 to 7, characterized in that the hollow body (7) consists of three rotatably and / or slidably interconnected pipe sections (7a, 7b, 7c). Firing device according to one of claims 1 to 8, characterized in that the hollow body (7) radially at least partially small compared to the slot (7 ') Having openings or meshed slots (7 ''). Chimney with firebox, flue and furnace opening, characterized in that a firing device according to one of claims 1 to 9 is arranged, wherein at least the region of the hollow body (7) with the slot (7 ') in the region of the bottom of the firebox (2) is. Chimney according to claim 10, characterized in that below the combustion chamber (2) in the region of the center of the hollow body at least one air supply (6) is arranged, preferably equipped with a fan air supply (6). Chimney according to claim 10 or 11, characterized in that in the region of the combustion chamber (2) a heating element (14) is arranged, preferably with respect to the combustion chamber opening is arranged vertically to the bottom of the combustion chamber (2).

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