TR2022003455T2 - A RADIAL EXTERNAL FLAME BURNER ASSEMBLY - Google Patents

Abstract

The invention consists of a perimeter wall (11) with a gas inlet (50) in which an injector (60) supplying flammable gas is mounted in a horizontal or narrow angle position, and a perimeter wall (11) that at least partially limits the gas inlet (50) and an air vent. a lower body (10) extending from a venturi element (13) adjacent to a mixing chamber (14) reached by its inlet (18); A flame distributor in which an air-gas mixture fed from the mixing chamber (14) and supplied from the lower body (10) is transferred through a corresponding distribution channel (26) and the air-gas mixture exits radially outwards through a plurality of slits (32) on an outer wall (34). It is related to the burner assembly for cooking devices containing (30). The burner assembly includes an inner wall (35) that surrounds the distribution channel (26) at a distance from the outer wall (34) and defines a feed chamber (33).

Description

DESCRIPTION A RADIAL EXTERNAL FLAME BURNER ASSEMBLY TECHNICAL FIELD The present invention relates to a burner assembly that is used on gas cooking devices and provides gas and air mixture with the help of a venturi element. KNOWN STATE OF THE ART A stove is equipped with a burner assembly that supplies a mixture of flammable gas and air to the mounting holes provided through a burner plate. The burner assembly has an inlet opening to which an injector is connected. There are types with horizontal or vertical injectors depending on whether the injector is placed on the bottom of the lower body from below or on the peripheral wall from the side. Burner assembly with horizontal or partially angled injector is preferred due to its efficiency. In such burner assemblies, there is a venturi element outside and the flammable gas provided by the gas injector is blown towards the venturi to accelerate the gas. The accelerated gas is taken into a container-shaped lower body and the air-gas mixture is transferred to a flame distributor and ignited there with the help of a lighter. Patent EP12714702 discloses a gas burner that produces a radial inward flame. Burner, a chamber connected to a radial venturi tube fed by a gas injector; a mixing body associated with the chamber including a toroidal portion defining a toroidal mixing chamber; It has a body in communication to create inward-facing flames with the mixing chamber comprising a circular outer cover with a plurality of holes having an inner surface facing towards the axis of the top cover. BRIEF DESCRIPTION OF THE INVENTION The aim of the invention is to provide a compact structure in a burner assembly with a venturi element, while at the same time increasing the combustion efficiency. To achieve the aforementioned objectives, the invention includes a perimeter wall with a gas inlet in which an injector supplying flammable gas is mounted in a horizontal or narrow-angle position, and a venturi element extending adjacent to a mixing chamber, at least partially delimited by the perimeter wall, in which the gas inlet and an air inlet meet. underbody; It relates to the burner assembly for cooking appliances containing a flame distributor, in which an air-gas mixture fed from the mixing chamber and supplied from the lower body is transferred through a corresponding distribution channel, and the air-gas mixture exits radially outwards through multiple slits on an outer wall. The preferred embodiment of the invention includes an inner wall that surrounds the distribution channel at a distance from the outer wall, defining a feeding chamber. The feeding chamber allows the gas-air mixture coming from the distribution channel to rise directly between the outer wall and the inner wall and flow out through the slits. In the feed chamber, which is narrowed thanks to the inner wall, an efficient combustion performance is achieved with minimum pressure loss by elevating the gas-air mixture coming from the distribution channel from the feed chamber. The inner wall and the outer wall may have a shape that is parallel or approaching each other from various parts. In a preferred embodiment of the invention, the air inlet is provided directly on the perimeter wall, aligned perpendicularly or at a wide angle to the distribution channel, supplying it from the lower body to create an air-gas mixture with flammable gas. Thus, a compact burner structure is provided. The air drawn radially from the surrounding wall into the lower body is lifted up axially and transferred radially outwards through the slits in the flame distributor. It has been determined that this structure provides high combustion performance as well as low emission values compared to burner assemblies that do not have a distribution chamber between the inner and outer walls. In a preferred embodiment of the invention, the air inlet is aligned on the perimeter wall, adjacent to the gas inlet, facing the venturi element. Thus, it has been determined that the flammable gas delivered under pressure by the injector into the lower body facilitates drawing air from the adjacent air inlet during entry into the counter venturi element. In a preferred embodiment of the invention, the outer wall and the inner wall lie coaxially. Thus, a corridor with equal distance from each section is obtained in the distribution room. An equal distance corridor prevents the formation of turbulence and reduces pressure loss during the advancement of the air-gas mixture. A preferred embodiment of the invention includes a flat cover that fits on the outer wall along an outer part, covering the feeding chamber. The flat cover ensures that the feed chamber is shredded in such a way that only air exits through the slits. It prevents foreign matter from entering the feeding chamber from above. Moreover, since it is removable, it can be easily cleaned. A preferred embodiment of the invention includes a central part that follows the outer part of the cover and fits against the inner wall. The central part and the outer part together block the view of the lower body from the top. In an alternative embodiment, a hole can be drilled in the center so that the lid can be adjusted to cover only the feeding chamber. In a preferred embodiment of the invention, the feeding chamber is in a toroid-like form. In this form, the middle part of the flame distributor is colder than the sides, thus heat distribution is improved and damage to coatings, for example, is prevented due to high heat in the flame distributor. In a preferred embodiment of the invention, the central chamber is at least partially aligned on the venturi element. It allows to obtain a compact burner element, on which the central chamber is located on the venturi element, and a flame distributor fits into the lower body. In a preferred embodiment of the invention, the inner wall extends to limit a central chamber and contains a sensor element rising from the central chamber. Measurement accuracy is increased because the flame sensor is placed in an area confined to the central chamber, thus cooled compared to the peripheral edges. In a preferred embodiment, the sensor element is a heat-sensing probe. Since the central chamber has a lower heat effect than the distribution channel, it is possible to make high-consistency measurements, for example, for a pot placed on it. In a preferred embodiment of the invention, the sensor element is in a rod-like form rising from the central chamber. In this way, it becomes possible to detect heat through conduction, for example by extending it from the top to the bottom of the pot. In a preferred embodiment of the invention, the sensor element includes a handle located on the lower body. Since the handle part is fixed to the lower body, it is possible for the sensor element to remain fixed inside the burner and to be disassembled when necessary. In a preferred embodiment of the invention, the sensor element is fixed in the middle of the central chamber. Thanks to the inner wall, the amount of heat in the central part is reduced compared to the peripheral edges. Since the heat effect is minimal in the middle of the center, it is possible for the sensor to be least affected by the burner's own temperature in case of burner burning. In a preferred embodiment of the invention, the inner wall extends shorter than the outer wall. In this way, it is closed from the upper parts with a curvilinear cover, allowing the central part where the inner wall is located to create a height difference with the surrounding part. In a preferred embodiment of the invention, the lower body is made of metal injection. With metal injection, the venturi element, air and gas inlet can be formed integrally in a single operation. In a preferred embodiment of the invention, the outer wall and inner wall are in circular form and the ratio of their diameters to each other is between 0.4 and 0.9, respectively. Surprisingly, it has been observed that this ratio produces the lowest emission values when combustion is provided with a burner. BRIEF DESCRIPTION OF THE FIGURES Figure 1 is a perspective view of a representative embodiment of the burner assembly with a single combustible ring with a radial external flame, which is the subject of the invention, and has a one-piece flat top cover. Figure 2 is a perspective view of the burner assembly shown in Figure 1, with the top cover removed. Figure 3 is a cross-sectional view of a representative embodiment of the burner assembly of the invention with a single-piece top cover. Figure 4 is a perspective view of a burner assembly comprising a cover with a hole in the middle part of which a rod-shaped sensor is placed. Figure 5 is a cross-sectional view of the representative embodiment of the invention shown in Figure 4. Figure 6 is a cross-sectional perspective view of a radial external flame single ring burner assembly with a rod sensor in the center of the lid. Figure 7 is the inlet section of an ambient air cooling channel formed between a lower part and a flame distributor of a representative embodiment of the burner assembly of the invention. Figure 8 is a general illustration of the air passage line from the ambient air cooling duct with the flame distributor removed in the embodiment shown in Figure 7. DETAILED DESCRIPTION OF THE INVENTION In this detailed description, the development of the subject of the invention is explained without any restrictions and with references to examples only to explain the subject better. In Figure 1, a gas burner with a radially outward single combustion ring, comprising a lower body (10) mounted under the burner plate and an upper part (20) placed on top of it, for mounting into a hole (not shown) in the burner plate of a gas stove. shown in perspective. The lower body (10) has a radial surrounding wall (11) at its front, and the surrounding wall (11) limits the front part of a mixing chamber (14). A gas inlet (50) is provided in the middle of the surrounding wall (11), allowing an injector (60) to be placed horizontally or at a narrow angle. An air inlet (12) is formed in an opening structure on the surrounding wall (11), at a distance and adjacent to each side of the gas inlet (50). The air inlet (12) is in the form of a grill and there is a flow regulation element (122) with holes in a grill-like shape. A venturi element (13) shown in Figure 3 is provided in the lower body (10) adjacent to the mixing chamber (14), coaxially with the gas inlet (50). The venturi element (13) has a venturi inlet (15) and a vent in the opposite direction. The outlet (17) extends from end to end, passing through the center of the lower body (10). The lower body (10) has a container-like structure and an upper part (20) fits into a mouth part (16) on the upper part in a gas-tight manner. A distribution channel (26) in a throat structure extending upwards close to the radial edge of the upper part (20) is formed by creating a cut in the part of the upper part (20) close to the gas inlet (50). ) is a formed planar plate. The mixing chamber (14) and venturi element (13) located in the lower body (10) are closed from the top by a covering part (22) of the upper part (20) from the gas inlet (50) in the lower body (10). The flammable gas provided and the ambient air drawn from the air inlets (12) come together in the mixing chamber (14) and are mixed at the outlet (17) after being accelerated by the venturi element (13). From there, due to the part covered by the covering part (22), it passes through the distribution channel (26) and air gases are mixed. The mixture is delivered to the flame distributor (30). In order to combine the upper part (20) with the lower body (10) in a leak-tight manner, an upper flange (24) on the rear part of the upper part (20) overlapping with a lower flange (19) located on a rear part of the lower body (10) overlaps the connection area. and here, for example, the upper and lower flange (24, 19) are brought together and fixed to each other with rivets. In Figure 2, the cover (40) located on the flame distributor (30), which is removably placed on the lower body (10) and has a connection that continues the distribution channel (26), is shown in perspective when it is removed. The flame distributor (30) is in a circular container-like form. A peripheral outer wall (34) of the flame distributor (30) contains multiple sequential slots (32) formed transversely along its upper edge. A circular inner wall (35), coaxial with the outer wall (34), delimits a central chamber (36) at a distance from the outer wall (34). A feeding chamber (33) is formed between the outer wall (34) and the inner wall (35). The distribution channel (26) extends radially within the feeding chamber (33). The diameter of the flame distributor (30) is smaller than the diameter of the mouth part (16). The central chamber (36) is circular and the lower body (10) can be accessed through it. The venturi element (15) is accessible from the central chamber (36). A flat one-piece cover (40), seen in Figure 1 and Figure 3, sits circumferentially on the outer wall (34) from an outer part (42) in a way that covers the slots (32) from the top. The central part (44) of the cover (40) completely covers the central chamber (36) from the top by sitting circumferentially on the inner wall (35) by bending the outer part (42) inwards in a conical manner. A slot (48) has been formed at the bottom of the central part (44) of the cover (40), where the inner wall (35) can be completely located, thus making it difficult for gas to pass from the feeding chamber (33) to the central chamber (36). By placing the cover (40) on the flame distributor (30), the feeding chamber (33) is closed from the top, forming a toroidal form. In this way, the flammable gas supplied from the injector (60) sitting on the gas inlet (50) inclined downwards at a small angle on the horizontal axis, passes from the mixing chamber (14) to the venturi element (15) opposite. Meanwhile, due to the negative pressure created, air is drawn from under the stove top (not shown) through the air inlets (12) provided on two opposite sides adjacent to the gas inlet (50). The air coming from the air inlet (12) and the flammable gas come together in the mixing chamber (14) and mix by passing through the venturi element (13). Against sudden pressure changes towards the air inlet (12), the flow regulation element (122) in the grill structure acts as a barrier and absorbs sudden air pressures. The air coming out of the outlet (17) hits the surrounding wall (11) of the lower body (10) from the corresponding part and the air-gas mixture is taken up from the distribution channel (26) and carried to the flame distributor (30). In the flame distributor (30), the feed channel (33) is located on the outside of the inner wall (35). The inner wall (35), which fits into the housing (48) from the top, transfers the air-gas mixture out of the slots (32) over the inner part of the outer wall (34). Thus, a radial outward flame formation is created by burning the air-gas mixture with an igniter (not shown). Figure 4 shows a representative embodiment of the burner assembly of the invention in perspective, in which a sensor element (70) is placed in rod form and probe structure. In this embodiment, a circular hole (46) is opened in the middle of the central part (44) of the cover (40). The sensor element (70) extends from a flattened top part (72) through the hole (46) to the lower body (10) over the central chamber (36), as shown in Figure 5 and Figure 6, the sensor element (70) is located on the upper part (20). It is placed in a slot on the stove through a handle (74). When a pot (not shown) is placed on the stove, the top part (72) contacts the bottom of the pot from the center of the circle created by the burner, and the central chamber (36) and the central part (44) on it are outside. It gets less heated than the part (42). The first factor that ensures this is the cooling created between the upper part (20) along a flow direction (A) of the ambient air and the flame distributor (30), which is removably placed on it and aligned with the distribution channel (26). It can pass through the channel (80). The cooling channel (80) is defined between a planar upper wall (28) of the upper part (20) and the planar lower wall (37) of the flame distributor (30) facing it. In addition, the fact that the central chamber (36) remains empty and the gas is prevented from exiting the central chamber (36) by the cover (40), the air-gas mixture is only passed through the feed chamber (33), and the combustion is carried out with the air-gas mixture provided from the feed chamber (33), also contributes to cooling. It helps. The central chamber (36), where the temperature decreases by creating a barrier with the inner wall (35), heats up less and provides less heat transfer to the sensor element (70) passing through it, thus providing a realistic pot bottom temperature measurement. At the same time, thanks to the cooling provided by the central chamber (36) in the central part (44), the cover (40) is prevented from being exposed to high temperatures and, for example, the coating of the cover (40), which has a coating, is prevented from shedding. In Figure 7 and Figure 8, the cooling channel (80) is shown in detail. The cooling channel (80) is located between the equal distance distribution channels (26) extending upwards by forming a neck like a chimney. While the air is drawn from the front of the lower body via the air inlet (12) over the surrounding wall (11), the drawn ambient air creates air flow (A) from front to back, as shown in Figure 8. While the air flow (A) passes through the cooling channel (80), it creates a cooling effect on the central part of the flame distributor (30). Thus, the heat distribution of the flame distributor (30), heated by the flame coming out of the radial outward slits (32), creates a gradient that decreases towards the radial center. The sensor element (70), erected in the radial center of the flame distributor (30), enables heat measurement with low error by being minimally affected by the heating of the fuel during cooking in the central part cooled by the ambient air. TR TR TR TR

Claims (1)

1.CLAIM 1- A perimeter wall (11) with a gas inlet (50) in which an injector (60) providing flammable gas is mounted in a horizontal or narrow-angle position, and the gas inlet (50) in which the perimeter wall (11) at least partially limits it. and a lower body (10) extending from a venturi element (13) adjacent to a mixing chamber (14) into which an air inlet (18) reaches; A flame distributor in which an air-gas mixture fed from the mixing chamber (14) and supplied from the lower body (10) is transferred through a corresponding distribution channel (26) and the air-gas mixture exits radially outward through multiple slits (32) on an outer wall (34). It is a burner assembly for cooking devices containing (30), and its feature is that it contains an inner wall (35) that surrounds the distribution channel (26) at a distance from the outer wall (34) and defines a feeding chamber (33). It is a burner assembly in accordance with Claim 1, and its feature is that the air inlet (18) is provided directly on the surrounding wall (12) by aligning it vertically or at a wide angle to the distribution channel (26) in a way that supplies it from the lower body (10) to create an air-gas mixture with flammable gas. is characterized. It is a burner assembly in accordance with Claim 2 and is characterized by the alignment of the air inlet (18) on the surrounding wall (11), adjacent to the gas inlet (50), facing the venturi element (13). It is a burner assembly according to any of the previous claims and is characterized by the coaxial extension of the outer wall (34) and the inner wall (35). It is a burner assembly according to any of the previous claims, and its feature is that it includes a flat cover (40) that fits on the outer wall (34) along an outer part (42) covering the feeding chamber (33). It is a burner assembly in accordance with claim 5, and its feature is that it includes a central part (44) that follows the outer part (42) of the cover (40) and fits on the inner wall (35). It is a burner assembly according to any of the previous claims, and its feature is that the feeding chamber (33) contains a toroid-like form. It is a burner assembly in accordance with Claim 6-7 and is characterized by the central chamber (36) being at least partially aligned on the venturi element (13). 9- It is a burner assembly according to any of the previous claims, and its feature is that the inner wall (35) extends to limit a central chamber (36) and contains a sensor element (70) rising from within the central chamber (36). 10-It is a burner assembly in accordance with claim 9 and is characterized by the sensor element (70) being in a rod-like form rising from the central chamber (36). 11-It is a burner assembly in accordance with claim 10, and its feature is that the sensor element (70) contains a handle part (74) located on the lower body (10). 12-It is a burner assembly according to claims 9-11 and is characterized by the fact that the sensor element (70) is fixed in the middle of the central chamber (36). 13- It is a burner assembly according to any of the previous claims and is characterized by the inner wall (35) extending shorter than the outer wall (34). 14- It is a burner assembly according to any of the previous claims and is characterized by the fact that the lower body (10) is made of metal injection. 15-It is a burner assembly according to any of the previous claims and is characterized by the fact that the outer wall (34) and the inner wall (35) are in circular form and the ratio of their diameters to each other is between 0.4 and 0.9, respectively. TR TR TR TR