Burner

Abstract: The invention relates to a burner body on a burner for a multi-fuel stove including a nozzle (4) that is essentially vertically oriented during the operation of the stove distinguished in that the nozzle (4) is connected to a number of flanges (5) that extend along and in directions away from the nozzle where the upper parts extend up to a level that is above the nozzle (4).

Description: The present invention refers to a vaporising burner for a multi-fuel stove including a nozzle that is essentially vertically oriented during the operation of the stove, the nozzle being surrounded by a burner housing that is open at the top. A burner of this type is known from US-A-1 946 817. The burner for a multi-fuel stove, which is normally used in the field but that can naturally also be used in other situations where access to other forms of fuel energy is not available, normally includes a valve housing that includes a nozzle as well as an outer wall or burner housing the valve housing. The valve housing is provided with a means of being connected to suitable fuel with a valve control. To start up the burner, the valve housing is warmed up with the help of pre-heating fuel and, after the valve housing has been warmed up, i.e. when pre-heating is complete, the valve is opened and the pressurized fuel is released so that it emerges through the nozzle. The fuel is heated to vaporization temperature by the preheated valve housing burner housing and thus leaves the nozzle in a gaseous form for ignition. With these known burners, the heat transfer for vaporizing the fuel takes place during operation via the normally perforated outer wall. The vaporization temperature achieved is thus in many cases insufficient, which is why it is difficult to use fuels with high vaporization temperatures such as, for example, kerosene. For this reason, fuels with lower vaporization temperatures such as, for example, petrol, are normally used for these multi-purpose stoves. By the present invention, it is possible to use optimally different fuels from petrol and down to kerosene and fuels with even higher vaporisation temperatures by virtue of the burner having the following characteristic features: the nozzle is connected to a number of flanges that extend along and in directions away from the nozzle where the upper parts extend up to a level that is above the nozzle and that between them channels are formed for the passage of vaporised fuel, and a burner plate is arranged at the top and connected to the upper edges of the flanges. A burner disclosed in US-A-3 754 853 has a burner plate connected to the nozzle by a number of radially oriented legs. However, this burner has no housing and the burner is arranged to prevent direct flame impingement upon the legs. GB 143 065 discloses a vaporising burner comprising a vertically oriented nozzle, a burner housing and a burner plate. The invention will be described in greater detail in the form of an example with reference to the drawings where Fig. 1 shows a burner according to the invention in perspective, Fig. 2 shows the burner in cross section, Fig. 3 shows the burner from above and Fig. 4 shows the burner with the burner housing partially cut away. The burner normally consists of a valve housing 1, an outer wall or burner housing 2 open at the top and a burner plate 3. The valve housing includes a fuel connection and adjusting valve that are not dealt with further in this context, as well as a nozzle 4 that is essentially vertically oriented during the operation of the stove. According to the invention, a number of flanges 5 are connected to the body of the burner that includes the valve housing 1 and the nozzle 4 in a manner so that they run outwards or radially in a direction away from the nozzle and where the upper parts extend to a level above the nozzle 4. The position and orientation of the flanges 5 is clearly evident from Figs. 3 and 4, whereby it should be realized that Fig. 4 shows the burner seen with the wall of the burner housing partially removed. Fig. 2 shows a practical embodiment where the valve housing 1 with the nozzle 4 can be considered to be cast in one piece with the flanges 5 and burner housing 2. This gives efficient heat conduction during the operation of the burner. As is evident from the drawings, especially Fig. 2, the burner plate 3 has a special form that is essentially "partly sinus-shaped", which effectively leads the flames towards the flanges during ignition and operation of the burner. When the burner according to the invention is functioning, the flames of the gas will come into contact with the burner plate 3 that deflects the flames radially outwards in a sideways direction and past the upper parts of the flange 5. These are thus heated up and the heat is led down via the flanges directly to the valve housing, which shortens the heating up time of the burner when compared with the equivalent burners of today. Due to this efficient, direct heating of the valve housing with the nozzle by the flames, it is possible to use fuels with high vaporization temperatures, as has been mentioned previously. Manufacturing the burner housing, valve housing and flanges can naturally be achieved in a number of different ways, but they all give the described example efficient conduction of heat back to the valve housing and nozzle.

Claims: A vaporising burner for a multi-fuel stove including a nozzle (4) that is essentially vertically oriented during the operation of the stove, the nozzle (4) being surrounded by a burner housing (2) that is open at the top, characterised in that the nozzle (4) is connected to a number of flanges (5) that extend along and in directions away from the nozzle where the upper parts extend up to a level that is above the nozzle (4) and that between them channels are formed for the passage of vaporised fuel, and a burner plate (3) is arranged at the top and connected to the upper edges of the flanges (5). The burner body according to claim 1, characterised in that the flanges (5) are arranged to extend essentially radially between the nozzle (4) and the burner housing (2). The burner according to claim 1 or 2, characterised in that the flanges (5) extend parallel with the axis of the nozzle (4). The burner according to any of claims 1-3, characterised in that the burner plate (3) has a circular shape and in cross-section is essentially partly sinus shaped with its convex side facing the burner.

Inventors: HELLUM MADS, HELLUM, MADS
Applicants: OPTIMUS INTERNAT AB, OPTIMUS INTERNATIONAL AB
Application year: 1999
Main classification: F23D11
IPC codes: F23D11