SPECIFICATION
Gas burner The invention relates to a gas burner and a system for joining the elements constituting the installation, which displays noticeable advantages with regard to those conventionally used.
Among the most used conventional burners are those which are constituted by a hollow truncated cone-shaped portion, inside which the combustible gas is mixed with the primary air for the combustion. In this kind of burner, the injector is directed towards the minor base of the hollow truncated cone-shaped body, the air suction being performed through it for the mixture thereof with the combustible gas.
The above mentioned conventional burners may be located in a vertical position, with the disadvantage of the considerable space they occupy, or they may be located in a horizontal position, with which the occupied space is smaller, but they have the disadvantage that, as they are located inside a closed enclosure, such as the upper panel of a kitchen piece of furniture, they need a primary ventilation that is achieved by performing air inlets for enabling the combustion, at the upper place of the device.
In such a way, when one wishes to change the type of gas to be used and, therefore, to change the injector and the regulation, the upper plate of the device wherein it is located must be dismounted, with the big waste of time it represents; likewise, in case of a break down, it is of difficult accessibility.
The joint of the constituting elements of the installation is carried out by means of nuts, thereby inserting the corresponding watertightness sockets, having performed in the conduction tube the adequate projections so that the nut with the insertion of the corresponding water-tightness socket presses against them; this form of joining gives place to a great number of difficulties in assembling and disassembling, mainly because of having to work within reduced spaces.
With the use of the gas burner and the system for joining the elements constituting the installation proposed by the invention, the disadvantages mentioned for the conventional burner can be avoided, besides the fact that the connection among the elements is simple and automatic.
The gas burner proposed by the invention is constituted by the injector support, which is fixed to the upper panel of the piece of furniture and is provided laterally with an inlet for connection to the gas supply, said inlet being connected to the injector, which will be centringly inserted towards the burner lid.Said injector support is provided at its upper portion with a series of flanges emerging from the surface of the upper panel of the piece of furniture and which will set into a cut provided at the lower face of the crown support of the burner, being thus joined in-between, at the same time as over the crown support the lid will be positioned through the crown thereof, with the peculiarity that the crown lid may be a single piece or independent pieces which enables the interconnection of the spaces which are located above and below the upper panel outwardly with respect to the mixture and Venturi's chamber, thus avoiding pernicious influences to the rest of the burners of the device.
The injector support is provided with joining small plates from the injector location zone up to the base of the upper projections, so that the space between said small plates is opened for the free circulation of the air.
The crown support has a central truncatedcone-shaped hole and at the upper face thereof a circular-crown-shaped surface is formed, the latter being provided with a slight inclination in a decreasing sense from the minor radius to the major one thereof, said circular crown surface facing the lower face of the lid, the latter being performed in an inverted conical form, the conicity of both facing faces being what produces the Venturi's effect.
In order to carry out the connection among the installation elements near the ends of the conduction tubes, a perimetric thickening has been performed on the latter, at the outer face of which a thoric joint is arranged, both ends being introduced into the mouth of the injector (gas burner) mouth, or in the mouth of the master key, which have been performed so that at the inner face thereof they are provided with an orthogonal group of steps outwards, over which the thoric joint stands, whilst at the outer surface thereof they have a perimetric cut constituting a thickening near the inner group of steps.The water-tight joint among the elements will stand fixed by means of a clip or fastening flange with a U-shape, the core of which has a hole through which the conductor tube passes and which stands arranged at the inner face of the thickening of the conductor tube, whilst the wings, provided with a hole on which the perimetric thickening of the mouths is located, will stand with their free central end over the cut, thereby avoiding the coming off thereof.
Embodiments of the present invention are described below with reference to the accompanying drawings, in which:- Figure 1 shows a ground view of the injector support, which is welded to the device and wherein the small plates connecting the zone where the injector is located with the upper surface can be seen; Figure 2 shows a view of the above figure as per a cut performed by the axis A-B, wherein we can see the mouth for the con- nection to the conduction and the place wherein the injector is located, as well as two of the small plates connecting the injector zone with the upper flanges for the joinging thereof to the crown support; Figure 3 shows a ground view of the crown support, which is joined to the injector support by the upper flanges of the latter, which are located in a box of the crown support;Figure 4 shows a view of the previous figure as per a cut performed by the axis C-D, wherein it can be seen how the upper circular crown-shaped surface has a slight decreasing inclination from the minor radius thereof to the major one; Figure 5 shows a ground view of the crown, which is located over the crown support and over which, in its turn, is the burner lid; Figure 6 shows an elevational view of the crown according to the previous figure, wherein it can be seen how according to a semi-axis said lid is represented as per a cut performed by the semi-axis E-F;Figure 7 shows a view representing the burner lid being performed with respect to the right semi-axis, according to an elevational view, and with respect to the other semi-axis according to a cut performed radially to the lid, so that the slight inclination of the inner face thereof, performed in an inverted conical form, can be seen on the underside; Figure 8 shows the fastening flange or clip according to an elevational view, wherein it can be seen how the wings thereof are provided with a central hole; Figure 9 shows a view of the previous figure, as per a cut performed by the axis G-H; Figure 10 shows a detailed view according to a semi-axis of the joint between the gas conduction tube and the mouth of the master key or burner; and Figure 11 shows a sectioned view of a joint of the conductor tube with the burner mouth.In the light of the above mentioned figures and according to the adopted numeration, we can see how the injector support 1 is provided with the lugs 2 with the holes 3, provided with thread, for the fixing thereof to the device by means of corresponding screws; likewise, the injector support 1 is provided with the flange 4 provided with the holes 5 and 6 for the pilot light and the security system respectively.
The injector will be located in the hole 7 inserted upwards, which connects with the conduction joining mouth 8. From the body 9 for the location of the injector, three small plates 10 diverge towards the upper part of the injector support 1, said small plates 10 being provided at the upper portion thereof with the flanges 11 through which the crown support 12 will be fixed. The burner mouth 8 is inwardly provided with a group of steps 14 being orthogonal outwards, whilst by the outer surface thereof the annular cut 15 is constituted, said annular cut 15 forming the projection 16 for the fixing of the conduction tube 17 by means of the fastening flange 18.
The crown support 12 is centrally provided with the truncated cone-shaped hole 19, the surface 20 being thereby upperly formed in way of circular crown, which has a slight decreasing inclination from its minor radius to its major one, whilst an annular recess or cut 21 has been formed in the underside of the crown support, this being provided, in its turn, with the projection 22 and with as many grooves therein (three in this case) as flanges 11 are provided at the injector support 1, so that, when said flanges 11 are positioned in said grooves, they will engage the cut 21 surface, both pieces being thereby located.
Likewise, the crown support 12 is provided with the hole 23, which will coincide with the hole 5 of the injector support 1 for the positioning of a pilot light.
The crown support 12 and the crown 24 may be constituted by a single piece or they may be constituted forming two independent pieces, in which case the crown 24 will stand over the surface 13 that is formed at the crown support 12. The crown 24 is provided with the hole 25.
Finally, the burner will be finished by the lid 26 being upperly located with respect to the crown 24 and which is constituted by the inner face thereof in an inverted conical form, its surface 27 forming a slight inclination from its centre to the periphery of said inner face, the conicity of this face of the lid 26 and that of the upper surface 20 of the crown support 12, which are facing each other, the ones that produce the Venturi's effect.
For the joint between the burner and the master key, the mouth 8 of both of them has been performed with the group of steps 14, so that, as the conductor tube 17 is provided with the perimetric thickening 28 with the thoric joint 29 being arranged to it by the outer face thereof, and, as said tube 17 is introduced into the mouth 8 for the joining inbetween, said thickening 28 will stand over the group of steps 14, with the insertion of the water-tightness thoric joint 29.So that this joint remains fixed, both elements are fastened by means of the fastening flange or clip 18, which is performed with a U-shape with its core being provided with a hole 31, through which the conductor tube 17 passes, said flange 18 behaving as a butt end on the inner face of the thickening 28 and the flange being fixed on the projection 16, as said flange is constituted with its wings provided with the hole 30 through which the projection 16 passes, and the free central end 32 of said wings standing in the cut 15, thereby avoiding the separation of both elements.
On performing the burner in the thus de- scribed way, an easy and quick access to the injector can be achieved, which favours the removal and cleaning thereof, since its disassembling is quite simple, due to the fact that the pieces it comprises are superposed each other, with which it will be enough to remove the crown support 12 for having access to the injector, because the crown 24 and the lid 26 stand over said crown support 12.
Likewise, the joining among all the elements is carried out in a simple and quick way with no need of complicated manipulations.