MXPA06009034A - Double burner for gas cookers, of the type provided with multiple concentric flame crowns - Google Patents

Abstract

The present invention refers to a double burner for gas cookers, of the type provided with multiple concentric flame crowns (FE, FC), which comprises two gas inlet (3, 4) that reach the centre of the body (1) at a slightly different height, so that communication can be provided between the gas inlets, if necessary, by simply drilling a hole (15) with vertical axis from the upper inlet (3) to the lower inlet (4).

Description

DOUBLE BURNER FOR GAS BURNERS, OF THE PROVISED TYPE WITH MULTIPLE CONCENTRIC CALL CROWNS FIELD OF THE INVENTION The present patent application relates to a double burner for gas burners, of the type provided with multiple concentric flame crowns.

BACKGROUND OF THE INVENTION The term "double burner" is used to indicate a burner with two different gas inlets provided with shunts that supply gas to two or more concentric flame crowns separately. The flame crowns can be switched on or off selectively, since the gas is supplied by means of two separate independent channels that end at the aforementioned inputs. In addition to being provided with multiple concentric flame crowns, traditional burners are characterized by the presence of a gas inlet with a bypass, which feeds all the channels used to bring the air-gas mixture to the burner head. In view of the above, the concentric flame crowns of traditional burners operate simultaneously, which means that they turn on and off together. Conversely, with double crowns the user can decide whether to turn on all the flame crowns or keep some of the crowns off.

THE INVENTION The purpose of the present invention is to provide a double burner for gas burners that can be converted with simple, inexpensive modifications, into a standard burner, ie a burner with a bypass mounted near one of the inlets, without losing the possibility to supply gas to all flame crowns of the double burner. To modify the existing models of double burners, a connecting pipe must be applied outside the body of the burner to provide communication between the mouths of the two gas inlets, so that the gas introduced into an inlet can flow freely through the pipe. of connection to the other inlet and, consequently, does not require that it be connected to the gas supply and equipped with a bypass. The purpose of the present invention is to provide a double burner for gas burners that can be converted into a standard burner without the introduction of external elements, such as the connection tube located outside the body of the burner, simply removing the internal wall of the body that separates the two gas inlets. An additional purpose of the present invention is to provide a double burner for gas burners that can be converted as illustrated above, characterized by the versatility of use thanks to the replacement of some elements according to different market requirements. It is worth mentioning that flat-bottomed pots are normally used in Western countries for kitchens, while the use of pots with spherical bottoms is popular in Asian countries. In the latter case, to ensure a good thermal performance of the burners, the flames should be tilted upwards, while in the first case the flames should have a perfectly horizontal direction. In view of the above considerations, the double burner of the invention has been designed in such a way that it is equipped with two types of. interchangeable covers, with the first cover being suitable for the invention of flames in the horizontal direction and the second cover being suitable for emission in the vertical direction. A further purpose of the present invention is to provide a double burner for gas burners, characterized by the modification and versatility of use mentioned above and provided with a compact volume. The burner of the invention comprises, in the traditional manner, a tube-shaped body containing separation walls used to define two different channels, without communication, of which one channel is used to supply gas to the external flame crowns and a The channel is used to supply gas to the central flame crowns. The bottom of the body traditionally has two different gas inlets, without communication, with horizontal axes used to supply gas to the channels - mentioned above selectively. According to the burner of the invention, the two gas inlets are characterized by the fact that both reach the center of the body at a slightly different height. Due to the above, communication between the inputs can be provided, if necessary, by simply drilling a hole with the vertical axis of the upper entrance towards the lower entrance. - According to the preferred embodiment of the present invention, the axes of the two inputs are on orthogonal vertical planes. Although US Pat. No. 6322 60B1 discloses a burner having the aforementioned characteristics it lacks compaction in height and has only two overlapping crowns placed on two different levels, so that the flames of the lower crown are spaced from the Flames of the upper crown. The considerable size in the height of the burner depends on the fact that the three venturi ducts combined with three respective nozzles have vertical axes. On the contrary, the burner according to the invention applies an opposite pair of venturi chambers with inclined axes. The inclined axis allows to reduce the size of the burner in height without reducing the length of the divergent section of the chambers, the length being responsible for the performance quality of the burner. In addition, thanks to the inclined axis the size of the burner in terms of length is controlled, if a burner of three crowns with concentric flames is manufactured at the same level. A burner of three crowns with concentric flares placed at the same level is described in the US Patent Publication No. 2001 / 0010897A1, however the size in height and the length of this type of burners is considerable since it adopts a first gas injector followed by a Venturi chamber with vertical axis and a second gas injector followed by a Venturi chamber with horizontal axis to feed the external flames of the two crowns. As specified above, the burner 'according to the invention contains two gas inlets. A vertical channel bifurcates from the upper inlet provided with the first gas nozzle designed to introduce gas into the supply channel of the central flame crowns, while a divergent pair of riser channels bifurcate from the lower inlet provided with nozzles designed for introduce gas into the supply channel of external flame crowns. A Venturi chamber is provided with a gas nozzle downstream to favor the mixing of the gas with the primary air. The burner of the invention has three chambers of Venturi, a central chamber with vertical axis above the first nozzle and two chambers in opposite position with inclined axes, respectively on top of the other two nozzles mentioned above. The chambers are located inside the burner head, that is to say the circular disc characterized by the presence of a concentric series of multiple crowns, where the covers rest to close the cavities of the toothed crowns, knowing that the flames come from each cavity. Another characteristic of the burner of the invention consists in the fact that it comprises a head formed by a lower disc and an upper disc that are perfectly coupled together to define the opposite pair of Venturi chambers with inclined axis. The third Venturi chamber is located in the central position in the upper disc, which is provided with a concentric series of multiple toothed crowns.

BRIEF DESCRIPTION OF THE DRAWINGS For greater clarity of the description of the double burner of the invention we continue with reference to the attached drawings, which are intended to serve for. purposes of illustration only and not in a limiting sense, so: Figure 1 is a cross section of the inventive burner with a vertical diametral plane passing through the axis of the first gas inlets; Figure 2 is a cross section of the burner of the invention with a vertical diametral plane passing through the second gas inlet, which in this case is at a height greater than the first inlet; - Figure 3 is the same cross section as Figure 1, except for the fact that it refers to the converted version of the burner, as shown by the communication created between the two gas inlets by means of an orifice with vertical axis; - Figure 4 is the same cross section as Figure 2, except for the fact that it refers to the converted version of the burner, as shown by the communication created between the two gas inlets by means of an orifice with vertical axis; - Figure 5 is a top view of the body of the burner of the invention; Figure 6 is a top view of the burner head without layers; Figure 7 is an axonometric view of the burner of the invention, cut with two orthogonal vertical planes passing through the axes of the two gas inlets, respectively; Figure 8 is the same cross section as Figure 1, except for the fact that it refers to the version of the burner with lids to favor the creation of flames with vertical inclination.

DETAILED DESCRIPTION OF THE PREFERRED MODALITIES OF THE INVENTION With reference to Figures 1 and 2, the double burner of the invention traditionally comprises a circular body (1) containing separation walls used to define two different channels, without communication, of which channel (E) is used for supply gas to the external flame crowns (FE) and the channel (C) to supply gas to the central flames (FC). The bottom of the body (1) traditionally has two different gas inlets, without communication (3 and 4) used to supply gas to the channels (C and E) selectively and respectively. The two gas inlets (3 and 4) reach the center of the body (1) at a slightly different height; More precisely, the upper entrance (3) extends exactly in the center of the body (1) and the lower entrance (4) goes beyond the center. A vertical channel (3a) bifurcates from the upper inlet (3) provided with the first gas nozzle (5), ie the nozzle used to supply gas to the central channel (C) that feeds the central flame crowns (FC) , while - the divergent pair of ascending channels (4a) branch off from the lower inlet (4) provided with gas nozzles (6) used to supply gas to the channel (E) that feeds the external flame crowns (FE). A Venturi chamber (5a) with vertical axis is provided downstream of the nozzle (5), and a pair of Venturi chambers (6a) with inclined axis, preferably 40 to 60 °, is provided downstream of the pair of nozzles (6). In addition, the burner of the invention comprises a head (T) formed by a lower disk (7) and an upper disk (8) that are perfectly coupled. More precisely, the lower disk (7) has a truncated conical shape and a stepped outer edge (7a) which acts as a support and for centering the upper disk (8) provided with a stepped perimeter collar (8a). The upper disk (8) finds a second centered x and support in the flat flange (9a) located at the upper end of the separation walls (9) that projects from inside a semicircular corridor (11) and feeds the concentric crowns of external flames (FE), as shown in Figure 6, in which the three toothed crowns (12) located above the upper disk (8) are clearly visible. The runner (11) is closed by an annular cover (13), on the outer edge of which the concentric crowns of external flame (FE) are formed. The Venturi chamber (5) is located inside the upper disc (8) and ends in a circular space closed laterally by the ring gear (12) with the smaller diameter and by a circular cover (14), on whose outer edge is formed the concentric crown of central flames (FC). As shown in Figure 3, the double burner of the invention can be converted into a common burner with three crowns of concentric flames by drilling an orifice with vertical axis (15) on the body in the central position of the lower gas inlet ( 4) to the vertical coaxial channel (3a) with the nozzle (5). The simple connection of the lower inlet (4) to the gas supply allows the three nozzles - ie the central (5) and lateral (6) nozzles - to be fed simultaneously, it being evident that in this case the upper gas inlet (3) it must be closed to prevent the gas introduced in the lower inlet (4) from leaving the body of the burner, moving back towards the upper entrance (3). To avoid the use of external elements, such as a closing cover for the inlet (3) the length of the inlet (3) can be reduced, appropriately, as shown in Figure 4. Since the body (1) it is obtained from molding or die casting, the reduction in length can be obtained easily and economically by simply moving back the bolt that is used as the "center" or core for the upper entrance (3).

As shown in Figure 8, to give the direction vertically inclined to the flames, the upper disk (8) and the layers (13 and 14) must be replaced with another disk (80) and two layers (130 and 140) with properly, without having to modify the configuration of the body (1) and the lower disk (7). Finally, it should be noted that the presence of the two Venturi chambers (ßa) with inclined, rather than vertical axes, allows to reduce the height of the burner.

Claims (7)

1. CLAIMS 1. Double burner for gas burners, of the type provided with crowns of multiple concentric flames, which comprises: a head (T) with crowns of multiple concentric flames; a circular body containing separations used to define two different channels, without communication used to supply gas to the external flame crowns (FE) and a channel (C) used to supply gas to the central flame (FC); two separate, non-communicating gas inlets located at the bottom of the body used to supply gas to the channels mentioned above (C and E) selectively, ending the upper entrance exactly at the center of the body and the lower inlet being beyond the center; The burner is characterized by the fact that a vertical channel divides from the upper entrance, which is provided with the first gas nozzle designed to introduce gas into the central channel (C) that supplies the central flames (FC), while that a divergent pair of ascending channels bifurcates from the lower entrance, which is provided with nozzles designed to introduce gas to the channel (E), which supplies the external flames (FE); provided that a Venturi chamber with a vertical axis is located downstream from the nozzle, and a pair of Venturi chambers with an inclined axis is located downstream of the pair of nozzles. Burner according to the preceding claim, characterized in that the head (T) is composed of a lower disk and an upper disk that are perfectly coupled, the lower disk having a truncated conical shape and a stepped outer edge that acts as support and to center the upper disk, which is provided with a stepped perimeter collar and finds a second support and centered on the flat flange located in the upper part of the separation walls that projects from the center of the body and separates the channels (C and E). Burner according to the preceding claim, characterized in that the lower disk and the upper disk have semi-conduits, respectively, which form the Venturi chambers. Burner according to one or more of the preceding claims, characterized in that it comprises a V-shaped baffle wall on the lower disk located downstream of the chambers, which favors the bifurcation of the air-gas flow coming from the cameras, which is transported inside a semicircular corridor that feeds the concentric external flames (FC). Burner according to one or more of the preceding claims, characterized in that the head (T) comprises an annular cover and a circular cover used to close the runner and Venturi chamber, respectively; provided that the disk is provided with toothed rings formed in such a way as to give a horizontal direction to the flames, together with the covers. 6. Burner according to one or more of claims 1 to 5, characterized in that the head (T) comprises an annular cover and a circular cover that closes the runner and Venturi chamber, respectively; provided that the disk has three toothed rings formed in such a way as to give a direction vertically inclined to the flames, together with the covers. Burner according to one or more of the preceding claims, characterized in that it is provided with an orifice with a vertical axis on the body in the central position starting from the lower gas inlet, • moves upwards and ends in the coaxial channel with the nozzle and further characterized by the fact that the upper conduit is blocked in the presence of the orifice.