EP2551589A2

EP2551589A2 - Gas burner with multiple flame rings

Info

Publication number: EP2551589A2
Application number: EP12175837A
Authority: EP
Inventors: Gokhan Turhan; Mehmet Demirezen
Original assignee: Turas Gaz Armatuerleri Sanayi ve Ticaret AS
Current assignee: Turas Gaz Armatuerleri Sanayi ve Ticaret AS
Priority date: 2011-07-28
Filing date: 2012-07-11
Publication date: 2013-01-30
Also published as: EP2551589A3

Abstract

A multiple gas burner (1), which homogenously heats the cookers such as fryers and saucepans located on it and has a high power value (4 Kw-5 kW) and in which adequate amount of secondary air feeding is provided to the ports inside and where successive flame jump occurs from the inner circles to the outer circles, is explained. In the said burner (1) in order to provide a homogenous heating, there exist at least two little flame crowns (1.3) which are symmetric to the center of the big flame crown (1.2) and have equivalent powers. In order to provide an adequate secondary air feeding, there exist at least two big flame crown upper ducts (1.2.6) and in order to provide successive flame jumps, there exist angular ports (1.2.3). The said at least two equivalent little flame crowns (1.3) are located in the space (1.2.7) in the center of the big flame crown (1.2) and located symmetrically with respect to the center of the big flame crown (1.2) in order to heat the cookers such as fryers and saucepans located on the burner homogenously.

Description

The present invention is related to a burner used in domestic cooking devices and which provides multiple gas burning. As it is known, generally a single burning system is used in the burning systems of the ovens and stoves used today. The single burning system is provided by three different burners, which are big, small and medium and with which a limited power (Kw) is obtained. However, nowadays burners comprising two or three burning systems and thus having higher power values are also has started to be used extensively.
These burners, which are called multiple burning systems, house the small burner and the big burner. In this burning system, there exist one or two inner circle burning and one or two outer circle burning. Thus, a homogenous distribution of the flame is obtained as the burner burns in the form of three or four circles. As there are more than one circle burning in the multiple gas burners, an adequate amount of secondary air feeding needs to be provided in order to prevent the flame of the inner circles from being extinguished. Again, by means of effective burning obtained by sending the air-gas mixture to the burning ports in a precise ratio, the desired power (Kw) and output values may be obtained. In a burner providing multiple gas burning, the burning generally occurs like this: One or more primary air intake is provided to the system. This primary air is transported to the combustion rooms via perpendicular venturi effect after being mixed with gas in a mixing room. Burning of the inner and outer circles is provided by igniting the air-gas mixture reaching to the combustion ports with an ignition tool. In multiple gas burners, the sparkplug and thermocouple are generally located close to outer circle ports where the first burning is realized. After the initial ignition by sparkplug in these burners, the outer circle burns first and the flame jumps to the inner circles from the outer circles by heating. Again, the burning inflammation is provided by thermocouple with respect to the outer circle ports. However in certain designs, the jumping of the flame from the outer circles to the inner circles, especially at a low heat, may be troublesome and slow. Besides that, when there exists no cooker on the burner, the inner circle ports does not burn and the unburned waste gas is released to the environment. The desired burning at the inner and outer circles may only be realized with the increase in the dimension of the flame when a saucepan with a big diameter is placed on the burner. However, in situations either with or without saucepans in multiple gas burners, designs, in which the inner and outer circle ports continuously burns, are needed to be produced. Again, when the thermocouple is located only at the outer circle, due to insufficient O₂ transfer, the inner ports will extinguish although the outer ports will keep on burning. In here, as a result of the extinguishment of any one of the inner or outer circles, the security systems have to be shut down after a while. This depends on the position of the thermocouple. Again, for the continuity of burning in the inner circles, an adequate amount of secondary air must regularly be withdrawn from the environment during burning. Inner circles which are not fed enough with the secondary air may extinguish causing an increase in the release of the unburned gas into the environment and affects the burner capacity substantially.
It is expected from the multiple burners to transfer the heat homogenously to the cooking pots such as fryer pans and saucepans placed onto the center of the multiple burners. Yet another subject is that, the present design provides ease of cleaning for the housewives and has an easy assembly and disassembly. Therefore, in the course of designing each multiple gas burners, all these subjects mentioned above should be taken into consideration and convenient designs should be introduced. The present invention is a novel multiple gas burner designed to offer solution for all of the problems mentioned above.

OBJECTIVE OF THE INVENTION

It is the objective of the present invention to provide a multiple burner which homogenously heats the cookers such as fryers and saucepans located on the burner and which has a high power value (Kw).
Another objective of the invention is to provide a multiple burner in which adequate amount of secondary air feeding is provided to the inner circles and a continuous burning is present in the inner circles.
Another objective of the invention is to provide a multiple burner in which the first ignition and burning inflammation are realized from the inner circles and thus, the burning is provided easily by successive flame jumps from the inner circles to the outer circles.
Another objective of the invention is to provide a multiple burner which can be easily cleaned by housewives and which can be easily assembled and disassembled.
A preferred embodiment of the invention is characterized in that there exists at least two little flame crowns symmetrical to the center of the big flame crown and these flames have equivalent powers.
Another preferred embodiment of the invention is characterized in that, there exists at least two big flame crown upper ducts which provide secondary air passage to at least two little flame crown.
Another preferred embodiment of the invention is characterized in that, at least two little flame crown is positioned in the big flame crown space by connecting to each other via a connector and to the big flame crown by at least two upper ducts.
Another preferred embodiment of the invention is characterized in that the ducts present between the big flame crown and the pool provide primary and secondary air feeding to the system.
Another preferred embodiment of the invention is characterized in that, there exist at least four gas inlet and four vertical venturis providing the primary air-gas mixture to the ports.
Another preferred embodiment of the invention is characterized in that, the sparkplug providing the first ignition and thermocouple providing the burning inflammation are located close to the big flame crown space and little flame crown ports.
Another preferred embodiment of the invention is characterized in that, the big flame crown and the pool are mounted to at least four "C" shaped ducts present on the pool, by locating at least four vertical nails present at the bottom of the big flame crown.
Another preferred embodiment of the invention is characterized in that, there exist at least eight accessory ports in total, at least six of which are positioned angularly. Another preferred embodiment of the invention is characterized in that, the angle A of the angularly positioned accessory ports is between 30°-60° and angle B of the angularly positioned accessory ports is between 15°-40°.
Another preferred embodiment of the invention is characterized in that, on one side of the inner circle ports of the said big flame crown, there exist at least five ports in total, consisting of at least two short flame ports and at least three long flame ports.
In another preferred embodiment of the invention, the inner circle ports of the big flame crown are located in such a way that the outer circle ports and little flame crown ports are H3>H2>H1 respectively.
The structural and distinctive characteristics and all advantages of the invention will be better understood with the figures below and the detailed description written by referring to these figures and therefore, the invention should be evaluated considering these figures and the detailed explanations.

BRIEF DESCRIPTION OF THE FIGURES

Figure 1, perspective view of the multiple gas burner,
Figure 2, another perspective view of the multiple gas burner,
Figure 3, perspective front view of the multiple gas burner,
Figure 4, cross-section view of the multiple gas burner,
Figure 5, view of the multiple gas burner from above,
Figure 6, another cross section view of the multiple gas burner,
Figure 7, another view of the multiple gas burner from above,
Figure 8, exploited view, showing the parts constituting the multiple gas burner,
Figure 9, perspective view of the multiple gas burner pool from above,
Figure 10, perspective view of the multiple gas burner pool from below,
Figure 11, perspective view of the big flame crown and little flame crown from above,
Figure 12, perspective view of the big flame crown and little flame crown from below,

REFERENCE NUMBERS

1. Multiple gas burner
- 1.1. Nozzle
- 1.2. Big flame crown
  - 1.2.1 Outer circle ports of the big flame crown (1.2)
    - 1.2.1.2. Burning in the outer circle ports (1.2.1)
  - 1.2.2. Inner circle ports of the big flame crown (1.2)
    - 1.2.2.1. Long flame ports of the inner circle ports (1.2.2)
    - 1.2.2.2. Short flame ports of the inner circle ports (1.2.2)
    - 1.2.2.3. Burning in the inner circle ports (1.2.2)
  - 1.2.3.Accessory ports providing the jumping of the flame
    - 1.2.3.1. Angularly positioned accessory ports
    - 1.2.4. At least four vertical venturi distributed radially around the center of the big flame crown (1.2)
    - 1.2.5. Vertical nails under the big flame crown (1.2)
    - 1.2.6.At least two upper ducts providing secondary air passage
    - 1.2.7. Space at the center of the big flame crown (1.2)
    - 1.2.8. Upper surface of the big flame crown (1.2)
    - 1.2.9. Ducts providing primary and secondary air feeding.
    - 1.2.10. Inner circle stage of the big flame crown (1.2)
- 1.3. Small flame crown
  - 1.3.1. Small flame crown (1.3) ports
    - 1.3.1.1. Burning in the small flame crown ports (1.3.1)
  - 1.3.2. At least four walls distributed radially around the center of the small flame crown (1.3)
  - 1.3.3.Connector connecting at least two little flame crowns (1.3) into eachother.
  - 1.3.4. Upper surface of the small flame crown (1.3)
- 1.4. Pool
  - 1.4.1.Ducts, which look like vertical "C" figure, on the upper side of the pool (1.5)
  - 1.4.2.Screw holes
  - 1.4.3.Nozzle holes
  - 1.4.4. At least four gas inlet holes
  - 1.4.5. Two elevations at the inner part of the pool (1.5)
  - 1.4.6. Thermocouple slots
  - 1.4.7. Sparkplug slots
- 1.5. At least two little flame covers
- 1.6. Big flame cover
- 1.7. Thermocouple
- 1.8. Sparkplug
- 1.9. Primary and secondary air
- 1.10. Gas inlet
- 1.11. Air/gas mixture
- 1.12. Secondary air in the environment

DETAILED DESCRIPTION OF THE INVENTION

The present invention will be explained in detail with reference to the attached figures and reference numbers mentioned above.
In Figure 1, general perspective view of the multiple gas burner (1), in Figure 2, another perspective view of the multiple gas burner, in Figure 3, perspective front view of the multiple gas burner, in Figure 4, C-C cross-section view of the multiple gas burner, in Figure 5, above view showing the successive flame jumps over the multiple gas burner, in Figure 6, B-B cross section view of the multiple gas burner, in Figure 7, view showing the angles of the accessory ports, in Figure 8, perspective view, showing the parts constituting the multiple gas burner (1), in Figure 9, perspective view of the multiple gas burner (1) pool (1.4) from above, in Figure 10, perspective view of the multiple gas burner (1) pool (1.4) from below, in Figure 11, perspective view of the big flame crown (1.2) and little flame crown (1.3) from above and in Figure 12, perspective view of the big flame crown (1.2) and little flame crown (1.3) from below are shown. Multiple gas burner (1) is generally composed of a pool (1.4), a big flame crown (1.2), at least two little flame crowns (1.3), one big flame cover (1.6) and at least two little flame covers (1.5) (see Figure 8). The reason for having at least two little flame crowns (1.3) is to provide high power values (4 Kw-5 Kw). The said at least two equivalent little flame crowns (1.3) are located in the space (1.2.7) in the center of the big flame crown (1.2) and located symmetrically with respect to the center of the big flame crown (1.2) in order to heat the cookers such as fryers and saucepans located on the burner homogenously. This positioning is provided by connecting the two little flame crowns (1.3) into each other via a connecting piece (1.3.3) and by connecting at least two upper ducts (1.2.6), which are providing the secondary air passage and situated on the big flame crown (1.2), to the little flame crowns (1.3). The pool (1.4) on the other hand, is mounted onto the sheet iron on the oven or cooker via screws. In order to achieve this, there exists four screw holes (1.4.2) on the pool (1.4) and the entrance of the gas (1.10) into the system is provided by at least four gas inlet holes (1.4.4). The gas, fed from the gas inlet holes (1.4.4) is transferred to the related ports by being sprayed from the nozzle (1.1) with a specific diameter and by being mixed with the primary air in the vertical venturis (1.2.4). The nozzles (1.1) are mounted to the nozzle holes (1.4.3) on the pool (1.4). For the big flame crown (1.2), nozzles (1.1) with similar flow transition rates and for the at least two little flame crown (1.3), again, nozzles (1.1) with similar flow transition rates are preferably used in the system. In order to provide an effective gas suction in the said vertical venturis (1.2.4), they must be at the same center with the nozzle (1.1) and there should be a defined distance between them and the nozzle (1.1) for suction. Therefore, the pool (1.4) and the big flame crown (1.2) should be mounted into each other by being clamped together in a suitable manner. This clamping is provided by fitting of the vertical nails (1.2.5) provided under the lower part of the big flame crown (1.2) to the vertical ducts (1.4.1) similar to "C" shape, on the pool (1.4) (See Fig.9, Fig.12). Thus, both the centering of the system is provided and the big flame crown (1.2) does not rise with a force applied from its side or the pool (1.4) and the big flame crown (1.2) does not diverge with the rotating movement. Again, by this way, the distance between the vertical venturis (1.2.4) and the nozzles (1.1) is kept constant. In this embodiment the assembly and disassembly of the pool (1.4) and the big flame crown (1.2) is simple. Additionally, the designed ducts (1.4.1), which are similar to "C" shape, shall be easily cleaned by housewives.
By placing the big flame crown (1.2) onto the pool (1.4), the inner part of the pool (1.4) is linked to the outer environment and at least four ducts (1.2.9) feeding air to the system are formed. A part of the primary and secondary air (1.9) sucked from these channels (1.2.9) passes from at least four vertical venturi (1.2.4) by being mixed with the gas passing from the nozzles (1.1) as the primary air while the other part provides air feeding to at least two little flame crowns (1.3) via big flame crown (1.2) space (1.2.7), as secondary air. By this means, a primary air-gas mixture (1.11) is obtained and also the extinguishment during burning is prevented by feeding the secondary air (1.12) in the environment to at least two little flame crowns (1.3). Namely, the air entering into the burner (1) through these ducts (1.2.9) serves as both primary air and secondary air. Again, in order to prevent extinguishment in at least two little flame crowns (1.3), there exist at least two upper ducts (1.2.6) in the big flame crown (1.2). The purpose of these ducts (1.2.6) is to provide secondary air (1.12) feeding by connecting at least two little flame crowns (1.3) to the outer environment. Again, by means of these ducts (1.2.6) the small flame crowns (1.3) are connected to the big flame crown (1.2), making the big flame crown (1.2) and at least the two little flame crowns (1.3) a single piece.
In Figure 4 and Figure 6, cross section views of the multiple gas burner are given. Based on this cross section views, the course of the air-gas mixture (1.11) in the multiple gas burner (1) is as follows: The gas (1.10) sprayed from the nozzles with an adequate diameter after passing through the gas inlet hole (1.4.4) and the air passing through the ducts (1.2.9), which are providing primary and secondary air (1.9) feeding, are sucked by at least four vertical venturi (1.2.4) and distributed to the ports as a primary air-gas mixture (1.11) by following the mixture way. The purpose of at least four vertical venturis (1.2.4) is to transport the primary air-gas mixture to the big flame crown (1.2) like in Figure 4 and to at least two little flame crowns (1.3) like in Figure 6. Two of these venturis (1.2.4) carry primary air-gas mixture (1.11) to the big flame crown (1.2) and the other two venturis carry primary air-gas mixture to the little flame crowns (1.3). The gas passing through the venturis (1.2.4), which carry the air-gas mixture to the big flame crown (1.2), hits the big flame cover (1.6) and diffuses into the outer circle ports (1.2.1) and inner circle ports (1.2.2) of the big flame crown (1.2). Afterwards, with a spark coming from the sparkplug (1.8) and with the flame jump method, the big flame crown outer circle ports (1.2.1.2) and inner circle ports (1.2.2.3) burns as is seen in Figure 4. On the other hand, in order to center the big flame cover (1.6), there exist an inner circle stage (1.2.10) and the said big flame cover (1.6) sits on this stage (1.2.10). The mixture (1.11) passing through the venturi (1.2.4), which carry the air-gas mixture to the small flame crown (1.3), hits the small flame cover (1.5) and diffuses into the small flame crown ports (1.3.1). Again, with a spark from the sparkplug, small flame crown ports start to burn (1.3.1.1). At least two little flame covers (1.5) are positioned on the little flame crown (1.3) and for the centering it, there exists preferably four walls (1.3.2) radially distributed around the center of the little flame crown (1.3). By contacting the stage at the lower part of the little flame cover (1.5), these walls (1.3.2) prevents the cover (1.5) from moving away from the desired central position. It is very important to place the flame covers (1.5, 1.6) through the multiple gas burner (1). Displacement of the little flame cover (1.5) or the big flame cover (1.6) from the center position may cause unstable, interrupted burns in some ports. Moreover, in traditional multiple gas burners, because of the wrong port designs, the flames of the ports of different burning areas may unite and thus, the burning may occur as a single flame. This forms a bad burning view and also points out an unstable burning. In the present invention, the outer circle ports of the big flame crown (1.2.1), inner circle ports (1.2.2) and little flame crown ports (1.3.1) are designed in a such a way that, each of them burns in different heights. The inner circle ports (1.2.2) of the big flame crown, outer circle ports (1.2.1) and little flame crown ports (1.3.1) are located with the order H3>H2>H1 consecutively. Thus, a stable burning is provided by preventing the superpositioning of the flames coming out of the ports.
In the designed multiple burner (1) the sparkplug (1.8) is located close to the little flame crown (1.3) where the initial flame is ignited and the thermocouple (1.7) is located to the space (1.2.8) at the middle of the big flame crown (1.2) in such a way that it will be close to the other little flame crown with the highest extinguishing risk (see Figure 2). In here, for the positioning of the sparkplug (1.8) and the thermocouple (1.7), there exist two elevations (1.4.5) inside the pool (1.4). The sparkplug (1.8) and the thermocouple (1.7) settle down on the sparkplug slot (1.4.7) and the thermocouple slot (1.4.6) drilled on these elevations (1.4.5).
In the multiple burner (1), whose thermocouple (1.7) and sparkplug (1.8) are positioned as mentioned above, the burning of all circles by the way of successive flame jumps will be explained with X, Y and Z references, in line with Figure 5. With the first ignition, the ports of the small flame crowns (1.3.1) closest to the sparkplug (1.8) burns first, peripherally and completely (X1). Then, the flame jumps to the cross accessory port (X2) located in the inner circle of the big flame crown (1.2), from here jumps to the other accessory port (X3) and finally jumps to the other cross accessory ports (X4) located on the outer circle of the big flame crown (1.2). In the multiple burner (1) there are at least eight accessory ports (1.2.3) in total and at least six of them are angularly positioned accessory ports (1.2.3.1). The said angularly positioned accessory ports (1.2.3.1) are positioned in such a way that the angle A is between 30°-60° and angle B is between 15⁰-40⁰ with respect to the X-axis. By the agency of the (X4) burning, the ports (1.2.1) on the outer circle of the big flame crown (1.2) starts to burn one by one, consecutively (X5, X6). On the other hand, by jumping (Y1, Z1) from the little flame crown ports (1.3.1) to the inner circle ports (1.2.2) of big flame crown (1.2), the flame burns (Y2, Z2) all of these ports (1.2.2). On one side of the inner circle ports (1.2.2) of the said big flame crown (1.3), there exist at least five ports in total, consisting of at least two short flame ports (1.2.2.2) and at least three long flame ports (1.2.2.1). Likewise, on the other side, which is symmetric to the center, there are at least five ports in total. The flame jumps (Y3, Z3) from the inner ports (1.2.2) to the other small flame crown ports (1.3.1) where the thermocouple (1.7) is located. From here, the flame jumps to the cross accessory port (Y4) located in the inner circle of the big flame crown (1.2), then jumps to the other accessory port (Y5) and to the other cross accessory ports (Y6) located on the outer circle of the big flame crown (1.2). By the agency of the (Y6) burning, the ports (1.2.1) on the outer circle of the big flame crown (1.2) starts to burn one by one, consecutively (Y7, Y8). In here, (X5) and (Y8) burnings and (X6) and (Y7) burnings come across with each other and consequently, the burning occurs faster. Additionally, the said flame jumps are described step by step in here, in order for the invention to be better understood. However, this process is completed in a very short time like 1-2 seconds.
This invention is suitable for use in all the places where these type of multiple burners are used (nowadays) and also suitable for use in all fields of industry. The invention is especially useful for use in domestic cooking devices.
The scope of protection of this application is given in the claims and can not be limited with the things told above with illustrative purposes. It is obvious that, someone skilled in the art can use the novelty presented in this invention by changing the form of the parts of the invention and can apply it to the other fields with similar purposes using similar set ups. Therefore, it is obvious that such set ups shall lack novelty.

Claims

A multiple gas burner (1) used in domestic cooking devices and which is generally composed of nozzle (1.1), big flame crown (1.2), little flame crown (1.3), pool (1.4), little flame cover (1.5), big flame cover (1.6), thermocouple (1.7) and sparkplug (1.8), characterized in that; it comprises at least two little flame crowns (1.3) and little flame cover (1.5) in order to obtain high power (Kw) values and to heat the cookers such as frier, saucepan placed on it homogenously, at least two upper ducts (1.2.6) and at least four gas inlets (1.4.4) in order to feed adequate amount of secondary air (1.12) to the little flame crown ports (1.3.1) and at least four vertical venturis (1.2.4) transporting the primary air-gas mixture to the ports (.2.1, 1.2.2, 1.3.1) and at least eight accessory ports (1.2.3) to facilitate successive flame jumps.
A multiple gas burner (1) according to Claim 1, characterized in that; the said at least two little flame crowns (1.3) are equivalent in power and they are located in the space (1.2.7) of the big flame crown (1.2), symmetric to its center.
A multiple gas burner (1) according to Claim 1, characterized in that; the said at least two little flame crowns (1.3) are connected to each other with at least one connector (1.3.3) and to the big flame crown (1.2) with at least two upper ducts (1.2.6).
A multiple gas burner (1) according to Claim 1, characterized in that; the primary and secondary air (1.9) are fed to the system via the ducts (1.2.9) located between the big flame crown (1.2) and the pool (1.4).
A multiple gas burner (1) according to Claim 1, characterized in that; the sparkplug (1.8) and the thermocouple (1.7) are located into the big flame crown space (1.2.7) in such a way that the sparkplug (1.8) will be close to any one of the ports of at least two little flame crowns (1.3) and the thermocouple (1.7) will be close to the other little crown ports (1.3.1) which are left free.
A multiple gas burner (1) according to Claim 1, characterized in that; the mounting of the said big flame crown (1.2) to the pool (1.4) is provided by engaging at least four vertical nails (1.2.5) present at the bottom of the big flame crown (1.2) to at least four "C" shaped ducts (1.4.1) present on the pool (1.4).
A multiple gas burner (1) according to Claim 1, characterized in that; there exist at least six angularly positioned accessory ports (1.2.3.1) on the said accessory ports (1.2.3).
A multiple gas burner (1) according to Claim 1, characterized in that; the angle A of the said angularly positioned accessory ports (1.2.3.1) is between 30°-60° and angle B of the angularly positioned accessory ports is between 15°-40°.
A multiple gas burner (1) according to Claim 1, characterized in that, on one side of the inner circle ports (1.2.2) of the said big flame crown (1.3), there exist at least five ports in total, consisting of at least two short flame ports (1.2.2.2) and at least three long flame ports (1.2.2.1).
A multiple gas burner (1) according to Claim 1, characterized in that; the inner
circle ports (1.2.2) of the big flame crown, outer circle ports (1.2.1) and little flame crown ports (1.3.1) are located with the order H3>H2>H1 consecutively, in order to provide a stable burning.