WO2012077050A2

WO2012077050A2 - A gas burner

Info

Publication number: WO2012077050A2
Application number: PCT/IB2011/055490
Authority: WO
Inventors: Ozer Kurtulus
Original assignee: Ser Dayanikli Tuketim Mallari Ic Ve Dis Ticaret Sanayi Limited Sirketi
Priority date: 2010-12-07
Filing date: 2011-12-06
Publication date: 2012-06-14
Also published as: TR201010169A2; WO2012077050A3

Abstract

The present invention relates to a gas burner (1) which receives the primary air required for combustion from under the oven or stove surface. The inventive gas burner (1) comprises at least one pool (2) having at least one gas inlet duct (3) and at least one injector, at least one burner (4) having at least one central chamber (5) and at least one peripheral chamber (6) that is located more outwardly relative to the central chamber (5), at least one fixing member (7) which is fixed to the burner (4) from thereunder and comprises a central duct (8) that enables the gas output from the injector to reach the central chamber (5), at least one central flame crown (9) which surrounds the central chamber (5) and through which the gas is output, inner and outer circumferential flame crowns (10, 11) surrounding the peripheral chamber (6), combustion conduits (12) which are located on the end part of the flame crowns (9, 10, 11), and where the combustion takes place, at least one central flame cover (13) which covers the central chamber (5) and is placed over the central flame crown (9), at least one circumferential flame cover (14) which covers the peripheral chamber (6) and is placed over the inner and outer circumferential flame crowns (10, 11), and at least one oven/stove surface (16) onto which the pool (2) is fixed.

Description

A GAS BURNER

Field of the Invention The present invention relates to a gas burner which receives the primary air required for combustion from under the oven or stove surface.

Background of the Invention Kitchen ovens and stoves are devices which are used for cooking and which have burners that enable to heat the food put over it as a result of the gas that is released. Although burners are used with a single flame crown nowadays, they can also be used with a plurality of flame crowns in order to achieve a more efficient cooking.

The most preferred gas burners with a plurality of flame crowns in present time are the ones with three flame crowns having an outer, central and inner flame crown. In the said gas burners, when the gas tap is in lowered (reduced) mode, there is the problem of conveying the flame from the outermost flame crown to the innermost flame crown in three seconds. In other words, when the outermost of the three flame crowns is being ignited, there is no ignition at the other flame crowns for three seconds and unburned gas release occurs.

The European patent document no. EP1531304 discloses a gas burner which comprises a central flame crown and at least one peripheral flame crown. Each flame crown has its own annular chamber and various horizontal Venturi ducts extending in a radial direction. The purpose of the long channels, extending from where the venture ducts end, is to enable the gas mixture to be mixed well and become homogenous and to be conveyed to the central chamber. The International patent document no. WO2007007298 discloses a gas burner comprising a plurality of flame crowns. The said gas burner is mainly comprised of a surface having flame crowns on it, a lower surface being under the said surface, a Venturi chamber, a cover forming the Venturi effect and sitting on the lower surface, at least one cover covering the flame crowns, and a pool.

The International patent document no. WO2006117815 discloses a gas burner comprising multiple concentric flame crowns. The said burner is mainly comprised of five Venturi mixing chambers; i.e. one central chamber with vertical axis that feeds the central burner and 4 regularly spaced chambers with inclined axis that feed the outer annular burner.

Summary of the Invention The objective of the present invention is to provide a gas burner which obtains the primary air required for combustion from the oven or stove inner part via Venturi effect.

Another objective of the invention is to provide, in ovens and stoves, a gas burner all of whose three flame crowns can be ignited in three seconds when the gas tap is in lowered mode.

A further objective of the invention is to provide a gas burner wherein the primary air required for combustion is not mixed with the gas released as a result of combustion.

Detailed Description of the Invention

A gas burner developed to fulfill the objectives of the present invention is illustrated in the accompanying figures, in which: Figure 1 is the perspective view of the gas burner of the present invention.

Figure 2 is the exploded perspective view of the gas burner.

Figure 3 is the top perspective view of the gas burner.

Figure 4 is the view of detail A given in Figure 3.

Figure 5 is the side view of the gas burner.

Figure 6 is the view of detail A given in Figure 5.

Figure 7 is the sectional view of the gas burner where the path followed by the air-gas mixture is shown.

Figure 8 is the view of detail A given in Figure 7.

Figure 9 is another sectional view of the gas burner where the path followed by the air-gas mixture is shown.

The components in the figures are assigned numerals as follows:

1. Gas burner

2. Pool

3. Gas inlet duct

4. Burner

5. Central chamber

6. Peripheral chamber

7. Fixing member (cross-piece)

8. Central duct

9. Central flame crown

10. Inner circumferential flame crown

11. Outer circumferential flame crown

12. Combustion conduits

13. Central flame cover

14. Circumferential flame cover

15. Venturi space

16. Oven/stove surface

17. Circumferential passage channel 18 Leg

19 Wall

20 Feeding holes

21 Upper chamber

22 Flame conveyor partition

The gas burner (1) of the present invention essentially comprises

- at least one pool (2) having at least one gas inlet duct (3) and at least one injector,

- at least one burner (4) having at least one central chamber (5) and at least one peripheral chamber (6) that is located more outwardly relative to the central chamber (5),

- at least one fixing member (7) which is fixed to the burner (4) from thereunder and comprises a central duct (8) that enables the gas output from the injector to reach the central chamber (5),

- at least one central flame crown (9) which surrounds the central chamber (5) and through which the gas is output,

- inner and outer circumferential flame crowns (10, 11) surrounding the peripheral chamber (6),

- combustion conduits (12) which are located on the end part of the flame crowns (9, 10, 11), and where the combustion takes place,

- at least one central flame cover (13) which covers the central chamber (5) and is placed over the central flame crown (9),

- at least one circumferential flame cover (14) which covers the peripheral chamber (6) and is placed over the inner and outer circumferential flame crowns

(10, 11), and

- at least one oven/stove surface (16) onto which the pool (2) is fixed.

In the gas burner (1) of the present invention, the pool (2) comprises at least one Venturi space (15) wherein the air required for primary combustion is provided. The pool (2) is fixed on the oven and/or stove surface (16) and the Venturi space (15) is located at the lower part of the surface (16). This way, the air required for the combustion is provided from the inner part of the surface (16) to which the pool (2) is connected. The air received from the space (15) as a result of Venturi effect and the gas provided from the injector get mixed along the central duct (8) and reach the central chamber (5).

Between the central chamber (5) and the peripheral chamber (6), there is provided at least one circumferential passage channel (17) which enables combustion in the inner and outer circumferential flame crowns (10, 11) upon the gas reaching from the central chamber (5) to the peripheral chamber (6). In the preferred embodiment of the invention, there are four circumferential passage channels (17) between the central chamber (5) and the peripheral chamber (6). While gas passage is enabled from three channels (17), the other channel (17) is closed to gas passage.

In the preferred embodiment of the invention, the circumferential passage channels (17) are disposed between the peripheral chamber (6) and central chamber (5), equally spaced apart. At the upper part of each channel (17) there is at least one leg (18) used for centering the central flame cover (13).

At the upper part of the central chamber (5), there is at least one wall (19) comprising feeding holes (20) which enable air-gas mixture to pass therethrough and reach the central flame crown (9). At least one upper chamber (21) is provided between the wall (19) and the central flame cover (13) which is placed at the upper part of the central chamber (5) over the central flame crown (9); the upper chamber (21) being used for regulating the flame heights at the central flame crown (9).

In the preferred embodiment of the inventive gas burner (1), there is provided a flame conveyor partition (22) that is perpendicular to the peripheral chamber (6) in order to perform ignition in three seconds when the gas tap is in lowered mode. The said partition (22) is formed by connecting the outer circumferential flame crown and inner circumferential flame crown (10, 11) and leaving a certain space therebetween. By providing vacated and rounded sections at the parts where the said flame conveyor partition (22) intersects with the inner circumferential flame crown (10), gas accumulation and explosions resulting from these accumulations are prevented. (Figure 3 and 4).

In the preferred embodiment of the invention, the flame conveyor partition (22) is located at the part of the circumferential passage channel (17) facing the peripheral chamber (6) where gas passage is closed, and extends parallel to the channel (17).

In the preferred embodiment of the gas burner (1), the inner circumferential flame crown (10) is inclined towards the wall (19). This way, while the air supply required for combustion is provided in the central flame crown (9), at the same time air-gas mixture exits in an inclined manner.

In the preferred embodiment of the invention, depths of the combustion conduits (12) at the outer circumferential flame crown (11) between two circumferential passage channels (17) increase as moved away from the channel (17), decrease as approached to the other circumferential passage channel (17), and remain at the same depth along the width of the channel (17). (Figure 5 and 6).

In the gas burner (1) of the present invention, the air-gas mixture (H/G); which is formed as a result of mixing the gas (G) supplied from the injector with the air (H) received into the pool (2) through the Venturi spaces (15); proceeds along the central duct (8) and hits the wall (19). A part of the air-gas mixture (H/G) that hits the wall (19) passes through the feeding holes (20) and reaches the upper chamber (21), while the remaining mixture (H/G) reaches from the central chamber (5) to the peripheral chamber (6). The air-gas mixture (H/G) that reaches the chambers (21, 6) hit the flame covers (13, 14) and exit through the combustion conduits (12). The gas that exits is ignited by a spark plug (B) and thereby combustion is realized. In the case that the flame is extinguished in any way, the safety valve (E) cuts off gas supply. (Figure 7, 8, 9) Within the scope of this basic concept, it is possible to develop various embodiments of the inventive gas burner (1). The invention can not be limited to the examples described herein and it is essentially according to the claims.

Claims

1. A gas burner (1) comprising

- at least one circumferential flame cover (14) which covers the peripheral chamber (6) and is placed over the inner and outer circumferential flame crowns (10, 11), and

- at least one oven/stove surface (16) onto which the pool (2) is fixed;

characterized by

- at least one Venturi space (15), which, due to fixing of the pool (2) on the surface (16), is located at the lower part of the surface (16), and thereby enables the primary air required for the combustion to be provided from the inner part of the surface (16).

2. A gas burner (1) according to Claim 1, characterized by at least one circumferential passage channel (17) which is located between the central chamber (5) and the peripheral chamber (6), and enables combustion in the inner and outer circumferential flame crowns (10, 11) upon the gas reaching from the central chamber (5) to the peripheral chamber (6).

3. A gas burner (1) according to Claim 2, characterized by four circumferential passage channels (17) located between the central chamber (5) and the peripheral chamber (6).

4. A gas burner (1) according to Claim 3, characterized by circumferential passage channels (17), wherein gas passage is enabled from three channels while the other channel is closed to gas passage.

5. A gas burner (1) according to Claim 2 or 3, characterized by at least one leg (18) which is located at the upper part of each channel (17) and which centers the central flame cover (13).

6. A gas burner (1) according to any one of the preceding claims characterized by at least one wall (19) which is located at the upper part of the central chamber (5), and which comprises feeding holes (20) which enable air-gas mixture to pass therethrough and reach the central flame crown (9).

7. A gas burner (1) according to Claim 6 characterized by at least one upper chamber (21), which is located between the wall (19) and the central flame cover (13) which is placed at the upper part of the central chamber (5) over the central flame crown (9) and which is used for regulating the flame heights at the central flame crown (9).

8. A gas burner (1) according to any one of the preceding claims characterized by at least one flame conveyor partition (22) which enables to perform ignition when the gas tap is in lowered mode and which is perpendicular to the peripheral chamber (6).

9. A gas burner (1) according to Claim 8 characterized by the flame conveyor partition (22) which is formed by connecting the outer circumferential flame crown and inner circumferential flame crown (10, 11) and leaving a certain space therebetween.

10. A gas burner (1) according to Claim 9 characterized by the flame conveyor partition (22) which enables to prevent gas accumulation and explosions resulting from these accumulations by having vacated and rounded sections at the parts where it intersects with the inner circumferential flame crown (10).

11. A gas burner (1) according to any one of the preceding claims characterized by the inner circumferential flame crowns (10) which provide the air supply required for combustion to take place in the central flame crown (9), and which are inclined towards the wall (19).

12. A gas burner (1) according to any one of Claims 2 to 11 characterized by the combustion conduits (12); which are located on the outer circumferential flame crown (11); and whose depths, between two circumferential passage channels (17), increase as moved away from the channel (17), decrease as approached to the other circumferential passage channel (17), and remain at the same depth along the width of the channel (17).