WO2019020855A1

WO2019020855A1 - Gas burner assembly for a gas cooking appliance, and gas cooking appliance comprising said gas burner assembly

Info

Publication number: WO2019020855A1
Application number: PCT/ES2018/070525
Authority: WO
Inventors: Alberto Bellomo; Xabier BIKUÑA ORMAZABAL
Original assignee: Copreci, S.Coop.
Priority date: 2017-07-26
Filing date: 2018-07-23
Publication date: 2019-01-31
Also published as: EP3660402B1; ES2697724B2; EP3660402A1; ES2833548T3; US20200158346A1; ES2697724A1

Abstract

Gas burner assembly comprising a gas burner (110) comprising a burner body (111), an injector (130) oriented towards the gas burner (110), a gas conduit (120) in fluid communication with the injector (130), and a burner holder (10) comprising a burner base (12) coupled to the burner body (111), the burner base (12) comprising a hole (16) that puts the burner body (111) in fluid communication with the injector (130), and an injector base (11) arranged below the burner base (12), the injector base (11) comprising the injector (130). The burner holder (10) is formed by two independent parts (10a, 10b) attached together to form the burner holder (10), a first part (10a) comprising the injector base (11) and a second part (10b) comprising the burner base (12).

Description

DESCRIPTION "Gas burner assembly for a gas cooking appliance, and gas cooking appliance incorporating said gas burner assembly"

SECTOR OF THE TECHNIQUE

The present invention relates to gas burner assemblies for gas cooking appliances, and gas cooking appliances incorporating said gas burner assemblies.

PRIOR STATE OF THE TECHNIQUE

Gas burner assemblies are known for gas cooking apparatuses comprising a burner body positioned above a cooking surface of a gas cooking appliance, where a mixture of air and gas is made and the flame is produced . This burner body is coupled to or supported on a burner support which is arranged attached to the cooking surface and below said cooking surface, the burner support and the burner body being fluidly communicated. In turn, this burner support supports a gas injector that injects gas into the burner body.

US2017 / 0038061 A1 discloses a gas burner assembly for a gas cooking appliance, comprising a gas burner comprising a burner body, an injector facing the gas burner, a gas line fluidically communicated with the injector, and a burner support comprising a burner base coupled to the burner body, the burner base comprising an orifice that fluidically communicates the burner body with the injector, and an injector base disposed below the burner base, the Injector base the injector. EXHIBITION OF THE INVENTION

The object of the invention is to provide a gas burner assembly for a gas cooking appliance, and a gas cooking appliance incorporating said gas burner assembly, as defined in the claims.

The gas burner assembly of the invention comprises a gas burner comprising a burner body, an injector facing the gas burner, a gas line fluidically communicated with the injector, and a burner support comprising a base burner coupled to the burner body, the burner base comprising an orifice that fluidically communicates the burner body with the injector, and an injector base disposed below the burner base, the injector base comprising the injector. The burner support is formed by two independent pieces that are joined to form the burner support, the first part comprising the injector base and the burner base comprising a second part.

In the state of the art the burner support is formed by a single piece, this piece usually being made of brass, aluminum, cast iron, ceramic, heat-resistant plastic, etc. The adaptation of the burner support to the different gas burners, according to different heating powers, of a gas cooking appliance involves designing and manufacturing a burner support for each different gas burner. At the same time, certain modifications made to the gas burners may lead to the replacement of the burner support in its entirety.

In the gas burner assembly of the invention, since the burner support is formed by two pieces, it is achieved that one of the pieces, the first piece comprising the injector base, is standard for all gas burners, and the other piece, the second piece comprising the burner base, is specific to each gas burner. In this way, since it is one of the standard parts for all gas burners, the same piece can be used for different types of burner supports, and in the event that changes occur in the gas burners or have to be modify the burner supports, it will be sufficient in many cases to replace only one of the pieces. Thus, a significant improvement in manufacturing costs is obtained. These and other advantages and features of the invention will become apparent in view of the figures and the detailed description of the invention.

DESCRIPTION OF THE DRAWINGS

Figure 1 shows a partial exploded top perspective view of a gas cooking appliance with an embodiment of the gas burner assembly of the invention.

Figure 2 shows a bottom perspective view of the gas burner assembly of Figure 1.

Figure 3 shows a side elevational view of the gas burner assembly of Figure 1.

Figure 4 shows a partial section view of the gas burner assembly according to line IV-IV of Figure 3.

Figure 5 shows a perspective view of the burner support of the gas burner assembly of Figure 1.

Figure 6 shows a bottom view of the burner support of Figure 5.

Figure 7 shows a perspective view of the second piece of the burner support of Figure 5.

Figure 8 shows a front elevation view of the second piece of the burner support of Figure 5.

Figure 9 shows a perspective view of the first piece of the burner support of Figure 5. Figure 10 shows a bottom view of the first piece of the burner support of Figure 5. DETAILED EXPLANATION OF THE INVENTION The gas cooking appliance 200 of Figure 1 shows four positions of sets of gas burners of different calorific powers, arranged on a cooking surface 210, one of which shows an embodiment of the set of gas burner 100 of the invention having a determined calorific power. The gas burner assembly 100 comprises, in this embodiment, a gas burner 1 10 where gas combustion occurs, this gas burner 1 10 comprising a burner body 1 1 1 and a burner cap 1 12 which partially covers the burner body 1 11, a combustion chamber being formed between the burner cap 112 and the burner body 1 11. The gas burner assembly 100 also comprises an injector 130 facing the gas burner 110, a duct of gas 120 fluidically communicated with the injector 130, and a burner support 10 comprising a burner base 12, and an injector base 1 1 disposed below the burner base 12. The burner base 12 is coupled to the burner body 12. burner 11 1, and comprises an orifice 16 that fluidically communicates the burner body 11 with the injector 130. The nozzle base 1 1 is disposed below the burner base 12, and comprises the injector 130.

The gas cooking appliance 200 comprises a gas inlet connected with an external gas supply, a gas line that distributes the external gas flow from the gas inlet to four gas taps 220 corresponding to each of the four sets of gas burners of the gas cooking appliance, said elements not being shown in the figures, except gas taps 220. These gas taps 220 allow regulation of the gas flow towards the gas burner assemblies. The outlet of the gas tap 220 corresponding to the gas burner assembly 100 is connected to one end 121 of the gas conduit 120, the other end 122 of the gas conduit 120 being coupled to the injector base 11 of the burner support 10. This end 122 of the gas conduit 120 is introduced into an orifice 18 of the injector base 1 1, coupling said end 122 with the injector base 1 1 with any of the techniques known from the state of the art. In the injector base 11 the end 122 protrudes, which comprises a mouth 123, and in said mouth 123 the injector 130 is coupled by some of the known techniques, either by friction, by threading, by means of coupling, etc. In this way, the injector 130 is fluidically communicated with the gas conduit 120, and therefore with the gas flow coming from the gas inlet of the gas cooking appliance 200. Thus, the direction of gas flow exit from the injector 130 is, in this embodiment, orthogonal to the injector base 11.

The burner support 10 is formed, as shown in Figures 5 and 6, by two independent parts 10a and 10b, which are joined to form the burner support 10. A first part 10a, shown in Figures 9 and 10 , comprises the injector base 1 1, which has a rectangular shape, and a second part 10b, shown in Figures 7 and 8, comprises the burner base 12. The first part 10a comprises in this embodiment the gas burner assembly 100, two connecting arms 19 projecting orthogonally from two opposite sides of the injector base 11 upwards, and allowing said injector base 1 1 to be connected to the burner base 12. Each of these connecting arms 19 comprises two branches, although in other embodiments it may comprise a single branch or may comprise more than two branches.

In this embodiment of the gas burner assembly 100, the first part 10a and the second part 10b of the burner support 10 are made from a thin sheet, this thin sheet being a metal sheet transformed by stamping. However, in other embodiments of the gas burner assembly 100, one of the parts, for example, the first part 10a may be made of a material and technique known in the manufacture of burner supports, brass, aluminum, cast iron, ceramic, heat resistant plastic, etc., and the second part 10b may be manufactured from a metal sheet and transformed by stamping. Or the opposite can be done, that is, the first part 10a is made from a metal sheet and transformed by stamping, and the second part 10b is made with a material and technique known in the manufacture of burner supports. The fact that the burner support 10 is formed by two pieces 10a and 10b is what makes it possible for both pieces 10a and 10, or one of them, to be made from a sheet metal transformed by stamping.

In this embodiment of the gas burner assembly 100, the first part 10a comprises, as seen in Figures 9 and 10, four support flanges 13 arranged at the ends of each of the branches corresponding to the connecting arms 19. , said support flanges 13 being bent in orthogonal direction with respect to the direction of the connecting arms 19, and therefore being parallel to the injector base 1 1. The two support flanges 13 corresponding to each connecting arm 19 are one of them smooth, and the other comprises a protuberance on its surface that allows welding with another surface on which it rests. Of course, the arrangement and the number of support tabs 13 with a smooth surface or protrusion may vary, and the number of protuberances may also vary to perform the welding.

On the other hand, the second piece 10b, comprising the burner base 12, has a substantially oval shape, with a substantially rectangular central body. The burner base 12 comprises a horizontal flat surface disposed in the central body, and comprises a circular perimeter wall 15 projecting upwards from said flat surface, and defining within its perimeter the hole 16 in the burner base 12 , so that said hole 16 and the injector 130 that is below the hole 16 in the injector base 1 1, are in fluidic communication. This perimetric wall 15 can have in another embodiment another shape that is not completely circular, or can even have another geometric shape, but always defines the inside of its perimeter the hole 16.

The perimeter wall 15 comprises in this embodiment of the gas burner assembly 100 three vertical positioning slots 17 on its surface, which are arranged every 120 °. At the same time, the burner body 11 1 of the gas burner 1 10 is a cylindrical part from which protrudes downwards a cylindrical and hollow projection, which allows the exterior of the burner body 11 to be communicated with the interior forming the burner. combustion chamber together with the burner cap 112. This projection comprises on its outer surface positioning slots (not shown in the figures), also positioned every 120 °, so that when the gas burner assembly 100 is mounted, the positioning grooves of the protrusion of the burner body 11 are coupled to the positioning slots 17 of the perimeter wall 15. Thus, the burner body 11 1, and therefore the combustion chamber, is in fluid communication with the injector 130

This positioning of the grooves 17 of the perimeter wall 15 of the burner support 10, and of the complementary grooves of the burner body 11, may be different for each of the burners of gas of different heat power from the gas cooking apparatus . In this way it is achieved that the burner bodies and the burner support of gas burners other than the gas cooking apparatus do not fit, and thus avoid mistakes in assembly, and subsequent bad combustions of gas burners. It is a simple type of poka-yoke that improves the quality of assembly and saves costs. This assembly system to avoid mistakes can be obtained with the different angular position of the positioning slots, but also by making the positioning slots have different dimensions, or also by making the number of positioning slots different, depending on the corresponding gas burner.

The second part 10b comprises in this embodiment, as seen in Figures 7 and 8, two hook tabs 14, each arranged on the edges of opposite sides of the burner base 12, on a diagonal that passes through the center of the hole 16. These latching tabs 14 are protrusions of the burner base 12 bent at 180 ° and which leave a space inside to engage another piece. When the two pieces 10a and 10b of the burner support 10 are joined, the support flanges 13 of the first part 10a having a protrusion on its surface rest on the lower surface of the burner base 12, and the support flanges 13 with smooth surface are inserted, hooking, inside the hook tabs 14 of the second part 10b. This way of joining the first piece 10a and the second piece 10b can be different, the first piece 10a comprising the hook tabs 14, and the second piece 10b comprising the tabs 13.

In addition, the number of support flanges 13, both with a smooth surface and with a protuberance surface, and the number of latching flanges 14 can be different. Thus, the first part 10a and the second part 10b can be joined without having to use the solder, by engaging support flanges 13 with a smooth surface with engagement flanges 14.

Once the two parts 10a and 10b have been engaged, the support flanges 13 with protrusion on their surface are welded to the surface on which they are supported, whether the burner base 12 or a surface of the first part 10a. The engagement tabs 14 can be hooked to the support tabs 13 with a smooth surface as they have been coupled, or a tightening can even be given by mechanical means to both flanges coupled to strengthen the latch.

The fact that the burner support 10 is formed by the parts 10a and 10b makes it possible for the first part 10a to be standard for all gas burners, and the Second piece 10b is specific for each gas burner. In this way, as the first standard part 10a for all gas burners, the same part 10a can be used for different types of burner supports 10, and in the event of modifications to the gas burners or have to modify the burner supports 10, it will be sufficient in many cases to replace only the second part 10b. Thus, a significant improvement in manufacturing costs is obtained.

In the embodiment of the gas burner assembly 100 shown in the figures, the orifice 18 of the injector base 1 1 where the injector 130 is coupled is centered on the surface of said injector base 1 1. At the same time, the orifice 16 defined inside the perimeter wall 15 of the burner base 12 is centered on the surface of said burner base 12, so that when the first piece 10a and the second piece 10b are joined, said hole 16 is centered with respect to the orifice 18 of the injector base 1 1. Thus, when the gas burner assembly 100 is mounted, the gas flow injected from the injector 130 is centered and in fluid communication with the burner body 11.

The first piece 10a, shown in Figures 9 and 10, comprises a support arm 20 projecting and extending axially from the injector base 1 1, and is intended to support a spark electrode (not shown in the figures). This support arm 20 comprises a first extension that extends orthogonally from the injector base 11 to approximately half a height between the injector base 11 and the burner base 12. Following the first extension, the support arm 20 comprises a supporting surface 21 extending parallel to the injector base 1 1. In this way, the supporting surface 21 is arranged orthogonally with respect to the coupling shaft of the burner body 11 with the burner base 12, which in this embodiment of the gas burner assembly 100 is the axis passing through the center of the hole 18, the center of the hole 16, and coincides with the axis of the protrusion of the burner body 11 1. The support surface 21 of the support arm 20 comprises three holes 22 arranged in a row in the axial direction from the injector base 1 1, and centered on the supporting surface 21. Each of the holes 22 comprises a lateral opening that coincides with on the edge of the support surface 21, and allows access from the outside of the spark electrode with its corresponding electrical connection cable, thus facilitating its mounting on the burner support 10. In this way, the support arm 20 allows position the spark electrode with respect to the burner body 11, in a position in which the spark coincides with the exit of the fuel gas from the gas burner 110 to the outside.

As each gas burner 1 10 of different heat power has a different burner body dimension 1 11, each orifice 22 of the support surface 21 corresponds to a gas burner 110 of different heat output. The number of holes 22 of the burner support 10 may be different depending on the type of gas cooking appliance 200 on which said burner support 10 is mounted.

The gas cooking appliance 200 comprises on its cooking surface 210 in the position of each gas burner assembly 100 a hole 25. When the gas burner assembly 100 is mounted, the perimeter wall 15 of the burner base 12 of the burner support 10 protrudes into the hole 25 of the cooking surface 210. The burner body 1 11 of the gas burner 110 is assembled by engaging in the perimeter wall 15 of the burner support 10, and the lower part of the burner body 11 is located slightly above the cooking surface 210, allowing the passage of air.

The burner base 12 of the second piece 10b further comprises, in this embodiment of the gas burner assembly 100, two primary air holes 23 arranged on the sides of the perimeter wall 15 and diagonally with respect to the axial axis of the first piece 10a. When the gas burner assembly 100 is mounted, these primary air holes 23 are in fluid communication with the hole 25 of the cooking surface 210, so as to allow air to pass from the outside of the gas cooking apparatus 200. in the interior, under the cooking surface 210. This air is mixed with the gas injected by the injector 130, and through the hole 16 in the burner base 12 reaches the combustion chamber of the gas burner 110. The number of holes of primary air 23 can be different depending on the gas burner assembly 100 and / or the gas cooking appliance 200.

The second piece 10b of the burner support 10 comprises, in this embodiment of the gas burner assembly 100, two holes 26 on the sides of the burner base 12, and the cooking surface 210 of the gas cooking apparatus 200 comprises two orifices 27 on the sides of the orifice 25. When the gas burner assembly 100 is mounted, the holes 26 of the second part 10b, and the holes 27 of the cooking surface 210 coincide and are joined by fixing means (not shown). in the figures), so that the gas burner assembly 100 is attached to the cooking surface 210 of the apparatus gas cooking 200. The number of holes 26 and 27 may be different depending on the gas burner assembly 100 and / or the gas cooking apparatus 200 on which said gas burner assembly 100 is mounted.

Claims

Gas burner assembly for a gas cooking appliance, comprising a gas burner (110) comprising a burner body (1 1 1), an injector (130) facing the gas burner (1 10), a gas conduit (120) fluidically communicated with the injector (130), and a burner support (10) comprising a burner base (12) coupled to the burner body (11), the burner base comprising (12) ) an orifice (16) fluidically communicating the burner body (1 1 1) with the injector (130), and an injector base (1 1) disposed below the burner base (12), comprising the injector base (11) the injector (130), characterized in that the burner support (10) is formed by two independent pieces (10a, 10b) that join to form the burner support (10), a first part (10a) comprising the injector base (11) and a second part (10b) comprising the burner base (12).

Gas burner assembly according to claim 1, wherein the first (10a) and / or the second part (10b) are manufactured from a thin sheet.

Gas burner assembly according to claim 2, wherein the thin sheet is a sheet metal transformed by stamping.

Gas burner assembly according to any of the preceding claims, wherein the parts (10a, 10b) of the burner support (10) comprise at least one support flange (13) and / or at least one latching flange (14) , the at least one supporting flange (13) of one piece (10a, 10b) resting on the other part (10a, 10b), and engaging the at least one one-piece latch flange (14a, 10b) in the other piece (10a, 10b).

The gas burner assembly according to claim 4, wherein the one-piece support flange (13) and the other part (10a, 10b) are welded together.

Gas burner assembly according to any of the preceding claims, wherein the burner base (12) comprises a flat horizontal surface and a perimeter wall (15) projecting upwards from said flat surface and defining inside its perimeter the hole (16) in the burner base (12), the body being of burner (11) coupled to said perimeter wall (15).

The gas burner assembly according to claim 6, wherein the perimeter wall (15) comprises at least one positioning groove (17), such that depending on the position and / or the dimensions and / or the number of positioning slots (17), the burner support (10) fits with a burner body (11 1) of a different heating power.

Gas burner assembly according to any of the preceding claims, wherein the injector base (11) comprises an orifice (18) in which the injector (130) is coupled, the orifice (16) of the burner base being (12) centered with respect to the hole (18) of the injector base (11).

The gas burner assembly according to claim 8, wherein an end (122) of the gas conduit (120) is coupled to the hole (18) of the injector base (11), the injector (130) being coupled to a mouth (123) of the end (122) of the conduit (120) by friction, by screwing, or by means of coupling.

Gas burner assembly according to any one of the preceding claims, wherein the first part (10a) comprises at least one connecting arm (19) connecting the injector base (11) to the burner base (12) .

The gas burner assembly according to any of the preceding claims, wherein the first part (10a) comprises a support arm (20) for a spark electrode extending axially from the injector base (11), and orthogonally with respect to the coupling shaft of the burner body (11 1) with the burner base (12), the support arm (20) positioning the spark electrode with respect to the burner body (11). Gas burner assembly according to claim 1, wherein the support arm (20) comprises a support surface (21) comprising a plurality of holes (22) arranged in a row in the axial direction from the base of injector (11), each orifice (22) corresponding to each gas burner (110) according to its heat output.

Gas burner assembly according to any one of the preceding claims, wherein the burner base (12) comprises at least one primary air hole (23), the at least one primary air hole (23) being in fluid communication with the hole (16) of the burner base (12).

14. Gas cooking appliance characterized in that it comprises at least one gas burner assembly according to any of the preceding claims.