DE29612717U1 - Brenner, especially for rechaud - Google Patents

Description

Markus Brodmerkel Graduate Designer Brunhildstraße 4 64625 Bensheim

Bensheim, 4 July 1996 Burner, especially for Rechaud

Burner that can be operated with liquid, pasty or solid fuel for preparing or heating up food and/or drinks, with a housing held in a frame that holds the fuel and a flame control disc that can be rotated on or in the housing and has openings that can be changed in the passage cross-section by rotating it.

The current state of spirit burner technology is based on the bowl burner, the size of the flame of which can be regulated by two perforated sheet metal hoods that can be rotated or moved against each other. They have a central flame outlet. The burner is extinguished by another cover or by closing all openings using the perforated disk mechanism described. The burner itself is placed in a mostly rigid frame, which also serves to support the pot.

The state of the art has the following disadvantages:

- the central flame outlet causes a concentration of heat in the middle of the bottom of the pot, which means that the food is heated unevenly and can burn in the middle,

- the rigid frame for setting up the burner and pot takes up a lot of space when stored,

- simply placing the pot over the flame means that the heat can flow upwards and sideways too easily, and therefore the heat transfer to the pot is not as efficient.

The object of the present invention arises from the elimination of the aforementioned disadvantages of the prior art.

- A burner should be created whose functionality allows the flame to be expanded in such a way that a more even heat distribution is achieved at the bottom of the pot,

-whose support legs are intended to support the burner, as well as to support and center the pot,

- the dimensions of the support legs are reduced by a mechanism and can therefore be stored with the burner in the pot to save space and

- improved heat transfer can be achieved by a simple device on the bottom of the pot.

The object is achieved according to the invention in that the housing is designed as a housing shell with a central opening and air supply holes in the bottom edge area,

that an annular shell is arranged in the housing shell to hold the fuel,

that the flame regulating disc is designed as a perforated disc arranged under the upwardly open ring shell, which can be rotated by a lever connected to it in such a way that the openings for the supply air flow can be changed in their passage cross-section, and

that a housing cover with a central opening is provided on the housing shell, which has an annular flame outlet.

Further details and alternative solutions can be found in the description and the claims.

The invention is explained using drawings. It shows:

Fig. 1 is a schematic sectional drawing of the burner according to the invention with cover, support legs and

Pot, whereby the supply air is sucked in under the burner and fed into the combustion chamber within the housing shell and the supply air quantity is regulated by a perforated disc on the bottom of the housing shell {air flow shown with thin lines, flame flow shown with dashed lines),

Fig. 2 a bottom view of the housing shell base, air inlet openings and slightly rotated perforated disc, with the hidden perforated disc shown in dashed lines,

Fig. 3 is a schematic sectional drawing according to Fig. 1, where two perforated disks, shown in dashed lines, are located on the tank ring and are responsible for regulating the flame intensity or extinguishing,

Fig. 4 a top view of the two perforated discs, lever and tank ring shell, with the lower perforated disc shown slightly twisted in dashed lines,

Fig. 5 a schematic sectional drawing according to Fig. 1 with modified air supply and flame control by means of two perforated housing covers,

Fig. 6 a top view of the two perforated housing covers with lever, with the lower housing cover shown in dashed lines,

Fig. 7 is a schematic sectional drawing according to Fig. 3 without a turntable, whereby the movable support legs engage with a mandrel in a recess in the housing shell base in the unfolded state,

Fig. 8 is a schematic sectional drawing according to Fig. 3 without turntable mechanism, with support legs rigidly attached to the inner ring on which the burner is placed,

Fig. 9 a bottom view of the burner with rotary disk

mechanism and support legs in the unfolded state,

Fig. 10 a bottom view of the burner according to Fig. 9 with slightly folded support legs,

Fig. 11 is a bottom view of the burner according to Fig. 9 with the support legs fully folded in.

Fig. 1 shows a schematic sectional drawing of the burner according to the invention, consisting of an annular housing shell (1) with a lower central opening (1.3). The housing shell (1) has air supply holes {1.1) in the edge area of the housing shell base (1.4), through which air can flow into the interior of the housing shell (1). A tank ring shell (2) is inserted into the housing shell {1) from above, which fits exactly into the housing shell (1) due to its dimensions and even has space to the housing shell (1) on the outer edge, whereby air supply can flow upwards between the tank ring shell (2) and the housing shell (1). The tank ring shell (2) contains the fuel (2.1) in the form of safety fuel paste or spirit. On the housing shell base (1.4) under the tank ring shell (2) there is a perforated disc (3) which has similar air inlet openings (3.1) as the housing shell (1). By turning the perforated disc (3) using the lever (3.2) via a connecting piece (3.3) around the axis of rotation (RA), the air inlet holes (1.1) of the housing shell (1) are more or less aligned with the air inlet openings (3.1) of the perforated disc.

(3) are congruent (see Fig. 2), whereby the amount of supply air flow (Z) and thus the size of the flame (F) can be regulated.

A slightly curved housing cover (4) is placed on the housing shell (1), which has an upper central opening (4.1) and a ring-shaped flame outlet (4.2). The curvature of the housing cover (4) creates a combustion chamber (4.3) above the tank ring shell (2), in which the evaporating fuel (2.1) can mix with the supply air flow (Z) and thus burn. The flame (F) penetrates upwards through the flame outlet (4.2) and forms a ring-shaped flame wall. The flame (F) through the lower central opening (1.3)

The air flowing in (L) helps to stabilize the ring-shaped flame (F) and thus enables a more even heat distribution on the bottom of the pot (8.1). A cover (10) is used to extinguish the flame (F), which, when the air supply holes are closed,

(1.1) is placed on the housing cover (4) and extinguishes the flame (F).

Under the housing shell (1) there are two joints

(1.2) the support legs (5) are mounted so that they can rotate horizontally. The lower end (5.1) of the support leg (5) is shaped so that the housing shell (1) is at a distance above the support surface

(A) is supported so that air can flow under the housing shell (1) into the lower central opening (1.3) of the housing shell (1) in order to stabilize the shape of the ring-shaped flame (F). The upper end (5.2) of the support leg (5) is designed in such a way that the pot (8) is centered by a slope (5.3) to the pot support surface (5.4), which at the same time prevents the pot (8) from slipping sideways.

Under the housing shell (1) there is a rotating disc (6) which is mounted in the lower central opening (1.3) in the housing shell (1) by an inner ring (6.2). A pin (6.3) guided in a groove (6.4) secures the rotating disc (6) against falling out. As shown in Fig. 8, 9 and 10, the rotating disc (6) has curved guides (6.1) in which guide pins (5.6) fixed to the extension (5.5) of the respective support leg (5) are guided. By rotating the rotating disc (6) around the axis of rotation (RA), the support legs (5) which are mounted horizontally in the joint (1.2) are simultaneously rotated towards the housing shell (1). This reduces the size of the burner over the support legs (5) and it can be stored in the pot (8) to save space. Fig. 8, 9 and 10 show the burner with 6 support legs (5), whereby their number can also be reduced to 5, 4 or 3 support legs (5) with the same technical principle.

For more efficient use of heat, the pot stands on a ring (7) that prevents the hot air from escaping too easily from the side under the pot base (8.1). This creates a slight build-up of heat under the pot base (8.1), which leads to more efficient heat transfer to the pot (8). The ring (7)

is either securely attached to the bottom of the pot (8.1) before cooking, or is a loose component under the pot (8) and has a conical widening (7.1) at the top to make it easier to center the pot (8). To allow the entire burner to be gripped centrally when it is cold, a holding bar (9) is provided, which crosses the lower central opening (1.3) of the housing shell (1) and can be easily grasped from above with the thumb, index and middle fingers.

Fig. 3 shows the same schematic sectional drawing as Fig. 1, but with a slightly modified mechanism for regulating the flame intensity. As an alternative to Fig. 1, a lower perforated disc (3.4) is secured against rotation on the tank ring shell

(2). It has lower flame outlets (3.6) above the tank ring shell (2) and next to it for regulating the supply air flow

(Z) lower air inlet openings (3.5) (see also Fig. 4). On this lower perforated disc (3.4) there is an upper perforated disc (3.7) with congruent upper flame outlets (3.9) and upper air inlet openings (3.8). The upper perforated disc (3.7) is connected to the extendable lever (3.2) and is mounted so that it can rotate around the axis of rotation (RA). This means that the air inlet flow (Z) and the evaporating fuel (2.1) can be regulated simultaneously. This means that the size of the flame (F) can be continuously regulated using the lever (3.2) and can even be extinguished.

Fig. 5 shows another alternative for controlling the flame intensity, whereby the rest of the schematic sectional drawing is identical to Fig. 1. The routing of the supply air flow (Z) has been changed compared to Fig. 1. The housing shell (1) is closed at the housing shell base (1.4) and the tank ring shell (2) fills almost the entire housing shell (1). The supply air flow (Z) is guided into the combustion chamber (4.3) via lower slots (4.5) in the lower housing cover (4.4). The size of the flame (F) and the extinguishing of the flame (F) can be controlled according to the principle already described several times by means of an upper housing cover (4.7), which has congruent upper slots (4.8) and upper flame openings (4.9) as the lower housing cover (4.4), which can also be rotated using the lever (3.2).

Fig. 7 shows a schematic sectional drawing according to Fig. 3, where the turntable (6) is omitted. Thus, the

to move the support legs (5) individually, each of which is horizontally movable via a joint (1.2). With a pin (5.7) on the extension (5.5) of the respective support leg (5), they snap into a recess (1.6) in the housing shell base (1.4) when unfolded.

Fig. 8 shows a schematic sectional drawing according to Fig. 3, where the support legs (5) are rigidly fixed to the inner ring (6.2) and the previously described turntable mechanism for folding in the support legs (5) is omitted. The drawing thus shows a simple alternative for setting up the burner, which, however, does not include space-saving storage. The ring (7) which is conical towards the top can even be fixed to the support legs (5).

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Burner, especially for Rechaud Reference symbols list:

1 Housing shell 1.1 Air supply holes 1.2 joint 1.3 lower centric opening 1.4 Housing shell bottom 1.5 Interior wall 1.6 deepening 2 Tank ring shell 2.1 fuel 3 Perforated disc 3.1 Air supply openings 3.2 lever 3.3 Connector 3.4 lower perforated disc 3.5 lower air supply openings 3.6 lower flame outlets 3.7 upper perforated disc 3.8 upper air supply openings 3.9 upper flame outlets 4 Housing cover 4.1 upper centric opening 4.2 Flame out1at 4.3 Combustion chamber 4.4 lower housing cover 4.5 lower slots 4.6 lower flame openings 4.7 upper housing cover 4.8 upper slots 4.9 upper flame openings 5 Support leg

lower end > · » · * · upper end 5.1 Slope 5.2 Pot support surface 5.3 Extension 5.4 Guide pin 5.5 mandrel 5.6 turntable 5.7 Ku1is senführung &bgr; Inner ring 6.1 Pen 6.2 Groove 6.3 ring 6.4 conical widening 7 Pot 7.1 Pot bottom 8th Handles 8.1 8.2

9 Supporting bar cover

A Contact area R.A. Rotation axis Z Supply air flow F flame L Airflow

Claims (10)

Protection claims 1. A burner which can be operated with liquid, pasty or solid fuel for preparing or heating up food and/or drinks, with a housing which is held in a frame and holds the fuel, and a flame regulating disc which is rotatable on or in the housing and has openings which can be changed in the passage cross-section by rotating it, characterized in that: that the housing is designed as a housing shell (1) having a lower central opening (1.3), that a tank ring shell (2) is arranged in the housing shell (1) to hold the fuel (2.1), that a housing cover (4) with an upper central opening (4.1) is provided on the housing shell (1), which has an annular flame outlet (4.2), and that the size of the flame can be regulated or extinguished using a flame regulating disc operated by a lever (3.2). 2. Burner according to claim 1, characterized in that that the housing shell (1) has air supply holes (1.1) in the bottom edge area, and that the flame regulating disc is designed as a perforated disc (3) arranged under the upwardly open tank ring shell (2), which can be rotated by a lever (3.2) connected to it in such a way that the air inlet openings (3.1) for the air inlet flow (Z) can be changed in their passage cross-section. 3. Burner according to claim 1, characterized in that the housing shell (1) has air supply holes (1.1) in the bottom edge area, and that the supply air flow (Z), the intensity and the extinguishing of the flame (F) are carried out by means of a lower perforated disc (3.4) resting on the tank ring shell (2) and a rotatable upper perforated disc (3.7), which can be rotated by a lever (3.2) connected to it in such a way that the lower air inlet openings (3.5) and lower flame outlets (3.6) are variable in their passage cross-section. 4. Burner according to claim 1, characterized in that that the supply air flow (Z), the intensity and the extinguishing of the flame (F) are controlled by means of a lower housing cover (4.4) provided with lower slots (4.5) and lower flame openings (4.6) on which an upper housing cover (4.7) with upper slots (4.8) and upper flame openings (4.9) is carried out by moving the upper housing cover (4.7) by means of a lever connected to it (3.2) can be rotated in such a way that the lower slots (4.5) and the lower flame openings (4.6) can be changed in their diameter cross-section. 5. Burner according to claims 1-4, characterized in that the support legs (5) at the lower end (5.1) are shaped in such a way that they support the housing shell (1) at a distance above the support surface (A) so that air can flow under the housing shell (1) into the lower central opening (1.3) can flow, and that the support legs (5) are shaped at the upper end (5.2) in such a way that they have a slope (5.3) for centering the pot (8) on the pot support surface (5.4). 6. Burner according to claims 1-5, characterized in that the burner can be touched in the cold state by means of a holding bar (9) which crosses the lower central opening (1.3). 7. Burner according to claims 1-6, characterized in that the pot (8) stands on a ring (7) which serves to retain the heat under the bottom of the pot (8.1) for longer, thus ensuring more efficient heat transfer. 8. Burner according to claims 1-7, characterized in that the support legs (5) are rigidly fixed to the inner ring (6.2) on which the burner is placed. 9. Burner according to claims 1-7, characterized in that the support legs (5) are each connected to the housing shell base (1.4) in a horizontally movable manner via a joint (1.2) and, when unfolded, engage in a recess (1.6) in the housing shell base (1.4) via a pin (5.7) on the extension (5.5) of the respective support leg (5). 10.Burner according to claims 1-7, characterized in that the support legs (5) are each connected to the housing shell base (1.4) in a horizontally pivotable manner via a joint (1.2) and via a turntable (6) which is rotatably mounted in the lower central opening (1.3) of the housing shell (1) by an inner ring (6.2) and which has the link guides (6.1) in which guide pins (5.6) fixed to the extensions (5.5) of the support legs (5) are guided, so that by turning the turntable (6) all the support legs (5) can be rotated towards the housing shell (1) at the same time.