Combustor

Abstract

The present disclosure relates to a combustor. The burner includes: a main body; a cover disposed on the top of the main body and coupled to the main body to define a mixing tube in which gas and air flow and are mixed with each other; and a head disposed on top of the cover and configured to generate a flame, in which the head includes: a first flame generating portion disposed in a central region of the head; and a second flame generating portion disposed in an outer region of the head. The main body, the cover, and the head are configured such that the fuel gas discharged from the mixing tube is divided into two portions flowing in opposite directions in an outer region of the main body, then the two portions of the fuel gas flow through the cover, then a portion of each of the two portions flows into the second flame generating portion, and the second flame generating portion flows into the second flame generating portion. And the rest part of each of the two parts flows from the outer area of the head part to the central area of the head part and flows into the first flame generating part.

Description

Technical Field

[0001] The present disclosure relates to a burner, and more particularly, to a burner having a simplified flow channel structure for the flow of fuel gas. Background Art

[0002] As described in this background art section, only the background information of the present disclosure is provided and does not constitute prior art.

[0003] A burner emits a flame and generally receives fuel gas from an external source and ignites the fuel gas to produce a flame. The burner can be installed in a cooking appliance.

[0004] The burner can be used for a gas stove or a cooking appliance stove that uses both fuel gas and electricity, and can receive fuel gas from an external source and burn the fuel gas to produce a flame.

[0005] The burner can be composed of two flame generating parts, and each of the two flame generating parts generally produces a flame having an annular shape. The two flame generating parts can respectively produce a small annular inner flame and a large annular outer flame surrounding the small annular flame.

[0006] In this structure, generally separate fuel gas flow paths are formed for the two flame generating parts respectively to convey the combustion fuel gas between the two flame generating parts spaced apart from each other. In such a general structure, a plurality of fuel gas flow paths independent of each other should be provided in the burner.

[0007] In addition, since the burner is provided with a plurality of fuel gas injection holes, a plurality of pipes connecting the external source and the fuel gas injection holes of the burner to each other should be provided.

[0008] The burner having the above structure has a complex structure for forming the fuel gas flow path, thereby making the overall structure of the burner complex. Therefore, due to the complex structure, the fuel gas does not flow smoothly, the performance of the burner deteriorates, and the manufacturing cost increases.

[0009] To solve this problem, it is necessary to manufacture a burner having a single fuel gas injection hole and a fuel gas flow path connected to the hole and divided into a plurality of flame generating parts spaced apart from each other.

[0010] The burner can generally be provided with a plurality of flame generating parts. The annular flame generating parts can be arranged to be spaced apart from each other in the radial direction of the burner.

[0011] In a burner of this structure, a structure is required to enable the flame to propagate from one flame generation part to another. For example, during initial ignition, the flame can first be generated in one of the multiple flame generation parts, and then can propagate from one flame generation part to another to generate a flame.

[0012] In addition, when the flame is extinguished in any one of the multiple flame generation parts due to interference such as wind, the burning flame in another flame generation part can propagate to the extinguished flame generation part, thereby generating a flame again in the extinguished flame generation part.

[0013] Therefore, a propagation structure that can propagate the flame between adjacent flame generation parts among the multiple flame generation parts is required. This flame propagation structure needs to have a structure that allows the flame to propagate smoothly between the flame generation parts. In addition, this propagation structure needs to have a structure that prevents an increase in incomplete combustion. Summary of the Invention

[0014] An object of the present disclosure is to provide a burner having a structure that improves performance and saves production costs.

[0015] In addition, an object of the present disclosure is to provide a burner having a structure that simplifies the path through which the gas flows.

[0016] In addition, an object of the present disclosure is to provide a burner having a structure that smoothly guides the flow of the gas.

[0017] In addition, an object of the present disclosure is to provide a burner having a structure that can propagate the flame between adjacent flame generation parts among multiple flame generation parts spaced apart from each other.

[0018] In addition, an object of the present disclosure is to provide a burner having a structure that can smoothly re-ignite the flame in the extinguished flame generation part among the multiple flame generation parts.

[0019] The object according to the present disclosure is not limited to the above objects. Other objects and advantages not mentioned according to the present disclosure can be understood based on the following description, and can be more clearly understood based on the embodiments according to the present disclosure. In addition, it will be easily understood that the objects and advantages according to the present disclosure can be achieved using the devices shown in the claims or their combinations.

[0020] A burner according to one embodiment may include: a main body; a cover disposed on top of the main body and coupled to the main body to define a mixing tube in which fuel gas and air flow and mix with each other; and a head disposed on top of the cover and configured to generate a flame, wherein the head includes: a first flame generating portion disposed in a central region of the head; and a second flame generating portion disposed in an outer region of the head.

[0021] The main body, the cover, and the head are configured such that: the fuel gas discharged from the mixing tube is divided into two portions flowing in opposite directions in an outer region of the main body, then the two portions of the fuel gas flow through the cover, and then a part of each of the two portions flows into the second flame generating portion, while the remaining part of each of the two portions flows from the outer region of the head to its central region and flows into the first flame generating portion. Accordingly, the burner may be configured such that the fuel gas discharged from a single mixing tube can be supplied to the first flame generating portion and the second flame generating portion in a separated manner.

[0022] The main body may include a first conduit that is connected to an outlet of the mixing tube in an outer region of the main body, wherein the first conduit has two separated portions that are connected to the outlet of the mixing tube and extend in a circumferential direction of the main body and in opposite directions respectively, and a part of the first conduit is closed by the cover, and the fuel gas flows in the first conduit.

[0023] The first conduit has inclined guiding surfaces formed on each of the distal ends of its two separated portions so as to change the flow direction of the fuel gas such that the fuel gas gradually rises upward. The inclined guiding surfaces may cause a smooth flow of the fuel gas by slowly changing the flow direction of the fuel gas.

[0024] Through-holes through which the fuel gas flows are formed in the cover in a region that at least partially overlaps with the inclined guiding surfaces. The through-holes include a pair of through-holes that are disposed in an outer region of the cover and are spaced apart from each other in a circumferential direction of the cover. The pair of through-holes may facilitate the flow of the fuel gas.

[0025] The burner may include a flame propagation portion embodied as a space in which a flame propagates between the first flame generating portion and the second flame generating portion.

[0026] The head includes propagation portion defining protrusions protruding upward from an upper surface of the head, wherein the propagation portion defining protrusions include a pair of propagation portion defining protrusions respectively disposed on two opposite sides of the flame propagation portion so as to define the flame propagation portion therebetween. The propagation portion defining protrusions may include propagation holes for discharging the fuel gas into the flame propagation portion.

[0027] The flame propagation portion defining protrusions may include a first protrusion and a second protrusion, the second protrusion being spaced apart from the first protrusion in the circumferential direction, wherein the first protrusion and the second protrusion define a flame propagation portion.

[0028] The propagation holes may include a plurality of first propagation holes formed in the first protrusion and second propagation holes formed in the second protrusion. The first propagation holes may be arranged such that the spacing in the radial direction of the head between the gas outlets of the first propagation holes where flames can be generated is larger than the spacing in the radial direction of the head between the gas inlets of the first propagation holes. Accordingly, coalescence between the flames at the gas outlets can be prevented.

[0029] The first propagation holes may include a pair of first propagation holes spaced apart from each other in the radial direction, and the second propagation holes may be positioned between the pair of first propagation holes in the radial direction. Accordingly, the plurality of first propagation holes and the second propagation holes may be alternately arranged with each other in the longitudinal direction of the flame propagation portion, and thus, a plurality of flames may be generated to be spaced apart from each other by a relatively small spacing. Such a structure can facilitate the propagation of the flames.

[0030] A burner according to another embodiment may include: a main body; a lid provided on top of the main body and coupled to the main body to define a mixing tube in which gas and air flow and mix with each other; and a head provided on top of the lid and configured to generate a flame, wherein the head includes: a first flame generation portion provided in a central region of the head; and a second flame generation portion provided in an outer region of the head.

[0031] The main body, the lid, and the head are configured such that: the gas discharged from the mixing tube flows through the lid and toward the central region of the lid, then, in the central region of the lid, is divided into a plurality of portions, then one portion thereof flows into the first flame generation portion, and the remaining portion thereof flows toward the outer region of the lid and into the second flame generation portion.

[0032] Accordingly, the burner may be configured such that the gas discharged from a single mixing tube can be supplied to the first flame generation portion and the second flame generation portion in a separated manner.

[0033] The head may include diffusion holes connected to a second conduit, through which the gas may flow.

[0034] The head may include a gas diffusion portion through which the gas that has flowed through the diffusion holes diffuses, wherein the gas diffusion portion is embodied as a space surrounded by the upper surface of the head and the second flame generation portion, and the gas diffusion portion extends along the periphery of the head.

[0035] The upper surface of the head has an inclined diffusion surface which is provided at the position where the diffusion hole and the gas diffusion part are connected to each other. Among them, the inclined diffusion surface contacts each of the two opposite ends of the diffusion hole and is inclined in the circumferential direction or the radial direction of the head. The gas flowing along the inclined diffusion surface can be evenly diffused to the entire gas diffusion part.

[0036] The gas that has flowed through the through-hole can flow from the outer region of the head to the central region of the head through the second conduit and then can be divided into multiple parts.

[0037] One part of the multiple parts thereof reaches the first flame generation part, is ejected through the first flame hole and burns. Another part of the multiple parts in the gas flows through the second conduit again from the central region of the head to the outer region of the head, flows through the diffusion hole, then reaches the second flame generation part, is ejected through the second flame hole and burns.

[0038] In the burner according to the present disclosure, compared with a structure in which an external source is connected to a plurality of pipes and a plurality of gas flow paths and flame generation parts respectively connected to the plurality of pipes are provided independently of each other, the overall structure of the burner according to the embodiment of the present disclosure can be simplified. In addition, the burner according to the embodiment of the present disclosure can be connected to an external source through a single pipe. This simple structure allows the smooth flow of gas inside the burner, improves the burner performance, and saves the manufacturing cost of the burner.

[0039] In addition, in the burner according to the present disclosure, the first conduit has inclined guiding surfaces formed on each of the distal ends of its two separate parts to change the flow direction of the gas so that the gas gradually rises upward. This structure can cause the smooth flow of the gas. That is, the gas flowing through the first conduit can be guided along the inclined guiding surface to gradually rise, thereby allowing the smooth flow of the gas.

[0040] In addition, in the burner according to the present disclosure, the through-hole can include a pair of through-holes which are arranged circumferentially spaced apart from each other and are provided in the outer region of the cover. Therefore, compared with the case where the gas flows into the head at one position, the gas flowing through the pair of through-holes spaced apart from each other can smoothly flow into the second flame generation part or the central region of the head.

[0041] In addition, in the burner according to the present disclosure, the first propagation hole can be arranged such that the spacing in the radial direction of the head between the gas outlets where flames can be generated in the first propagation hole is larger than the spacing in the radial direction of the head between the gas inlets of the first propagation hole. Due to this structure, the merging between the flames generated in the adjacent first propagation holes can be effectively prevented.

[0042] In addition, in the burner according to the present disclosure, a plurality of first propagation holes and second propagation holes may be alternately arranged with respect to each other in the longitudinal direction of the flame propagation section, and thus, a plurality of flames may be generated so as to be spaced apart from each other by a small distance. Accordingly, the flame propagation section may have a plurality of positions arranged in the longitudinal direction of the flame propagation section, and flames are generated at the plurality of positions, and thus the flames may easily propagate along the flame propagation section. Accordingly, initial ignition or re-ignition of the first flame generation section and the second flame generation section may be promoted.

[0043] In addition, in the burner according to the present disclosure, since the gas discharge holes, the propagation holes, and the flame guide section are arranged to be spaced apart from each other in the radial direction of the head, the flame may smoothly propagate from the first flame generation section to the second flame generation section, and vice versa.

[0044] Due to the smooth flame propagation between the first flame generation section and the second flame generation section, any extinguished flame generation section may be immediately re-ignited. Accordingly, the performance of the burner may be improved.

[0045] In addition, in the burner according to the present disclosure, while the gas flowing into the gas diffusion section through the diffusion holes further flows upward, the gas may be guided along the inclined diffusion surface so as to smoothly diffuse into the gas diffusion section and then be uniformly distributed throughout the gas diffusion section. As a result, the second flame generation section may receive a uniform gas supply in its circumferential direction, and thus a uniform flame may be generated in its circumferential direction.

[0046] In addition, in the burner according to the present disclosure, the gas discharged from a single mixing pipe may be divided into a plurality of portions, and the plurality of portions may be respectively supplied to a plurality of flame generation sections radially spaced apart from each other in the burner. Due to this structure, the flow channels for supplying gas to the flame generation sections may be integrated with each other. The gas may be supplied to the burner using a single supply pipe, and the flow channel structure in the burner may be simplified.

[0047] In addition to the above effects, specific effects of the present disclosure and specific details for implementing the present disclosure will be described below. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a perspective view showing a burner according to an embodiment.

[0049] Figure 2 is Figure 1 a side view of

[0050] Figure 3 is Figure 1 a rear view of

[0051] Figure 4 is Figure 1 exploded top view perspective view.

[0052] Figure 5 is Figure 1 exploded bottom view perspective view.

[0053] Figure 6 is the side view cross-sectional view of the burner.

[0054] Figure 7 is the perspective view showing the main body and the cover of the burner.

[0055] Figure 8 is Figure 7 exploded view.

[0056] Figure 9 is Figure 7 top view.

[0057] Figure 10 is Figure 7 bottom view.

[0058] Figure 11 is the perspective view of the main body.

[0059] Figure 12 is Figure 11 top view.

[0060] Figure 13 is the perspective view of the cover.

[0061] Figure 14 is Figure 13 bottom view.

[0062] Figure 15 is Figure 13 top view.

[0063] Figure 16 is the perspective view showing the cover and the head.

[0064] Figure 17 is Figure 16 exploded top view perspective view.

[0065] Figure 18 is Figure 16 bottom view perspective view.

[0066] Figure 19 is Figure 16 top view.

[0067] Figure 20 is the perspective view of the head.

[0068] Figure 21 is Figure 20 bottom view.

[0069] Figure 22 is Figure 20 the top view of

[0070] Figure 23 is Figure 20 the view of

[0071] Figure 24 is Figure 23 the enlarged view of part 24 of

[0072] Figure 25 is Figure 23 the enlarged view of part 25 of

[0073] Figure 26 is the perspective view showing the state where the outer cap and the inner cap are mounted on the head.

[0074] Figure 27 is Figure 26 the sectional view of

[0075] Figure 28 is Figure 27 the enlarged view of part 28 of

[0076] Figure 29 is the perspective view showing the inner cap.

[0077] Figure 30 is the diagram for showing the flow of combustion gas in the burner according to one embodiment.

[0078] Figure 31 is the enlarged top view of the flame propagation part of the head.

[0079] Figure 32 is the view showing the state where the outer cap and the inner cap are mounted on the Figure 31 head in

[0080] Figure 33 is the enlarged perspective view of the flame propagation part in the head.

[0081] Figure 34 is the diagram for showing the flow of combustion gas in the flame propagation part of the head.

[0082] Figure 35 is the perspective view showing the burner according to another embodiment.

[0083] Figure 36 is Figure 35 the side view of

[0084] Figure 37 is Figure 35 the rear view of

[0085] Figure 38 is Figure 35 exploded top-down perspective view.

[0086] Figure 39 is Figure 35 exploded bottom-up perspective view.

[0087] Figure 40 is the side sectional view of the burner.

[0088] Figure 41 is the perspective view showing the main body and the cover of the burner.

[0089] Figure 42 is Figure 41 exploded view.

[0090] Figure 43 is Figure 41 top view.

[0091] Figure 44 is Figure 41 bottom view.

[0092] Figure 45 is the perspective view of the main body.

[0093] Figure 46 is Figure 45 top view.

[0094] Figure 47 is the perspective view of the cover.

[0095] Figure 48 is Figure 47 bottom view.

[0096] Figure 49 is Figure 47 top view.

[0097] Figure 50 is the perspective view showing the cover and the head.

[0098] Figure 51 is Figure 50 exploded top-down perspective view.

[0099] Figure 52 is Figure 50 bottom-up perspective view.

[0100] Figure 53 is Figure 50 top view.

[0101] Figure 54 is the perspective view of the head.

[0102] Figure 55 is Figure 54 bottom view.

[0103] Figure 56 is Figure 54 the top view of

[0104] Figure 57 is Figure 54 views in different directions.

[0105] Figure 58 is Figure 57 an enlarged view of part 58 of

[0106] Figure 59 is Figure 57 an enlarged view of part 59 of

[0107] Figure 60 is a perspective view showing the state in which the outer cap and the inner cap are mounted on the head.

[0108] Figure 61 is Figure 60 the sectional view of

[0109] Figure 62 is Figure 61 an enlarged view of part 62 of

[0110] Figure 63 is a perspective view showing the inner cap.

[0111] Figure 64 is a diagram for showing the flow of gas in a burner according to an embodiment. Detailed Embodiments

[0112] The above objects, features, and advantages will be described in detail later with reference to the drawings so that those skilled in the art to which the present disclosure pertains can easily practice the technical idea of the present disclosure. When determining that a detailed description of well-known technologies related to the present disclosure may unnecessarily obscure the gist of the present disclosure, the detailed description thereof will be omitted. Hereinafter, preferred embodiments according to the present disclosure will be described in detail with reference to the drawings. In the drawings, the same reference numerals are used to denote the same or similar components.

[0113] It will be understood that although terms such as "first", "second", and "third" may be used herein to describe various elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms are used to distinguish one element, component, region, layer, or section from another element, component, region, layer, or section. Thus, the first element, component, region, layer, or section described below may be referred to as the second element, component, region, layer, or section without departing from the spirit and scope of the present disclosure.

[0114] As used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly dictates otherwise.

[0115] It will also be understood that the terms “comprises” and “comprising,” when used in this specification, specify the presence of the stated features, integers, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, operations, elements, components, and / or portions thereof.

[0116] Unless otherwise specified, throughout this disclosure, “A and / or B” means A, B, or A and B, and “C to D” means including C to D, unless otherwise specified.

[0117] A burner according to an embodiment can be used in a gas stove or a stove of a combination cooking appliance that uses both gas and electricity, and can receive gas from an external source and burn the gas to produce a flame.

[0118] The burner can be composed of two flame generating parts, and each of the two flame generating parts generally produces a flame having an annular shape. The two flame generating parts can respectively produce a small annular inner flame and a large annular outer flame surrounding the small annular flame.

[0119] In such a structure, separate gas flow paths are generally formed for the two flame generating parts respectively to convey the combustion gas between the two flame generating parts spaced apart from each other. In such a general structure, a plurality of gas flow paths independent of each other should be provided in the burner.

[0120] In addition, since the burner is provided with a plurality of gas injection holes, a plurality of pipes connecting the external source and the gas injection holes of the burner to each other should be provided.

[0121] The burner having the above structure has a complex structure for forming the gas flow path, which makes the overall structure of the burner complex. Therefore, due to the complex structure, the gas does not flow smoothly, the performance of the burner deteriorates, and the manufacturing cost increases.

[0122] To solve this problem, it is necessary to manufacture a burner that has a single gas injection hole and a gas flow path connected to the hole and divided into a plurality of flame generating parts spaced apart from each other.

[0123] A burner according to an embodiment has a structure that solves the above problems, and a burner according to an embodiment will be described in detail below.

[0124] First Embodiment

[0125] Figure 1 is a perspective view showing a burner according to an embodiment. Figure 2 isFigure 1 Side view. Figure 3 is Figure 1 Rear view. The burner according to the embodiment may include a main body 100, a cover 200, a head 300, an inner cap 420, and an outer cap 410.

[0126] The main body 100 may constitute the lower part of the burner and may be connected to an external source through a pipe so that the main body can receive the gas required for combustion from the external source. The cover 200 may be disposed on top of the main body 100 and may be coupled to the main body 100 to define a mixing pipe 101 in which the gas and air flow and mix with each other.

[0127] In the illustrated embodiment, the cover 200 and the main body 100 are manufactured separately from each other. However, in another embodiment, the cover 200 and the main body 100 may be integrated into a single body.

[0128] The mixing pipe 101 may be embodied as a space in the burner. The gas flowing from the external source to the burner and the air flowing into the burner from the surrounding environment of the burner may meet and mix with each other in the mixing pipe 101. The gas may be mixed with the air, and thus may receive oxygen from the air required for combustion, and thus may burn in the head 300.

[0129] The mixing pipe 101 may be formed by combining the main body 100 and the cover 200 with each other. The main body 100 may constitute approximately the lower half of the mixing pipe 101, while the cover 200 may constitute approximately the upper half of the mixing pipe 101.

[0130] The head 300 may be disposed on top of the cover 200, and a flame may be generated in the head 300. The head 300 may be coupled to the cover 200 to form a path through which the air flowing into the head 300 and the cover 200 through the main body 100 flows. The gas flow path formed by combining the head and the cover 200 may distribute the gas to a first flame generation part 310 and a second flame generation part 320, which will be described in detail below.

[0131] The inner cap 420 may cover the top of the first flame generation part 310 where the flame may be generated, and may control the propagation direction of the flame so that the flame is guided outward in the radial direction of the head 300. The outer cap 410 may cover the top of the second flame generation part 320 where the flame may be generated, and may control the propagation direction of the flame so that the flame is guided outward in the radial direction of the head 300.

[0132] Figure 4 is Figure 1 Exploded top view perspective view. Figure 5 is Figure 1Exploded perspective view from below. The head 300 may include a flame generating portion. In the flame generating portion, while the fuel gas is discharged to the outside of the burner, the fuel gas is ignited by a spark plug (not shown), thereby generating a flame.

[0133] The head 300 may include a first flame generating portion 310 and a second flame generating portion 320 where a flame can be generated. The first flame generating portion 310 may be disposed in the central region of the head 300, and a plurality of first flame holes 311 may be defined in the first flame generating portion 310 and may be arranged along its periphery.

[0134] The second flame generating portion 320 may be disposed in the outer region of the head 300 and may be arranged to surround the first flame generating portion 310. A plurality of second flame holes 321 may be defined in the second flame generating portion 320 and may be arranged along its periphery. Thus, when a flame can be generated in the burner, an inner annular flame and an outer annular flame can be generated in a dual manner.

[0135] The fuel gas flowing inside the burner may be discharged through the first flame holes 311 and the second flame holes 321. When the fuel gas is ignited, a flame can be generated at the outlet of each of the first flame holes 311 and the second flame holes 321, so that the flame can be maintained while discharging the fuel gas.

[0136] The first flame generating portion 310 and the second flame generating portion 320 may be separate components and may be spaced apart from each other. Therefore, it is necessary to supply fuel gas to each of the first flame generating portion 310 and the second flame generating portion 320 separately. In an embodiment, one mixing pipe 101 may be used, and the fuel gas flowing from one pipe to the mixing pipe may flow through the single mixing pipe 101.

[0137] Therefore, the fuel gas discharged from one mixing pipe 101 should flow into the first flame generating portion 310 and the second flame generating portion 320 that are spaced apart from each other. For this purpose, inside the burner, it is necessary to form a flow channel to distribute the fuel gas discharged from the mixing pipe 101 to each of the first flame generating portion 310 in the central region and the second flame generating portion 320 in the outer region.

[0138] In the burner according to the embodiment, the main body 100, the cover 200, and the head 300 are configured such that: the gas discharged from the mixing pipe 101 is divided into two parts flowing in opposite directions in the outer region of the main body, then, these two parts of the gas flow through the cover 200, and then, a part of each of these two parts flows into the second flame generation part 320, while the remaining part of each of these two parts flows from the outer region of the head 300 to its central region and flows into the first flame generation part 310.

[0139] In other words, the gas discharged from the mixing pipe 101 can flow through the cover 200 and reach the outer region at the top of the cover 200. A part of the gas can flow from the top of the cover 200 to the outer region of the head 300, flow through the head 300, reach the top of the head 300, and flow into the second flame generation part 320 in the outer region of the head 300.

[0140] Another part of the gas can flow from the outer region at the top of the cover 200 to the central region, flow through the head 300, reach the top of the head 300, and flow into the first flame generation part 310 in the central region of the head 300.

[0141] Due to this structure, the gas flowing into a common mixing pipe 101 can be divided into two parts inside the burner when flowing through the flow channels formed in the burner, and then these two parts can flow into the first flame generation part 310 and the second flame generation part 320 respectively.

[0142] Therefore, compared with a structure in which an external source is connected to multiple pipes and multiple gas flow paths and flame generation parts respectively connected to the multiple pipes are provided independently of each other, the overall structure of the burner according to the embodiment of the present disclosure can be simplified. In addition, the burner according to the embodiment of the present disclosure can be connected to an external source through a single pipe. This simple structure allows for smooth flow of gas inside the burner, improves burner performance, and saves the manufacturing cost of the burner.

[0143] Figure 6 is a side cross-sectional view of the burner. In the following drawings, solid arrows indicate the flow of gas. In addition, in Figure 6 the flow of air flowing into the burner from the surrounding environment is indicated by dashed arrows.

[0144] The main body 100 may include an injection part 130 and an air receiving part 140. The injection part 130 may be formed on one side of the main body 100, and a gas injection hole 131 may be defined in the injection part 130. The gas injection hole 131 may be formed to extend through the injection part 130 and may have an inlet connected to a pipe connected to an external source supplying gas.

[0145] The injection part 130, the air receiving part 140, and the mixing pipe 101 may be arranged in a straight line. Due to this structure, the gas that has flowed through the injection part 130 may smoothly flow through the air receiving part 140 and the mixing pipe 101.

[0146] The gas injection hole 131 may be formed in the injection part 130 to extend through the injection part 130.

[0147] The air receiving part 140 may be disposed between the inlet of the mixing pipe 101 and the outlet of the injection part 130. A space into which air is introduced may be formed in the air receiving part 140. In one example, the air guide 301 may protrude downward from the head 300 and may cover the space of the air receiving part 140. The air guide 301 may be formed in a substantially "U" shape to be combined with the air receiving part 140 to form a space into which air flows.

[0148] The air guide 301 may cover the space of the air receiving part 140, but may be coupled to the air receiving part 140 to form a hole in the rear side of the burner through which ambient air flows into the space of the air receiving part 140. Through this hole, the air around the burner may flow into the space of the air receiving part 140.

[0149] The inlet of the gas injection hole 131 may be relatively wide, and its outlet may be relatively narrow. For example, an orifice may be provided at the outlet of the gas injection hole 131 such that the gas flowing into the main body 100 through the gas injection hole 131 may be ejected from the outlet of the gas injection hole 131 at a very high speed.

[0150] The gas ejected from the outlet of the gas injection hole 131 may flow into the mixing pipe 101 without being dispersed due to its very high flow rate. At this time, the gas may encounter the air flowing into the air receiving part 140 when flowing through the air receiving part 140, and at the same time, the air may flow into the mixing pipe 101.

[0151] When gas flows through the mixing tube 101, the gas can be mixed with the air that has been introduced into the air receiving part 140, and then, the mixture of the gas and the air can be discharged from the mixing tube 101. In this way, the gas can be mixed with the air in the mixing tube 101 and can be mixed with the oxygen in the air. Therefore, when the mixture is ignited by a spark plug, the mixture can burn.

[0152] For example, the mixing tube 101 can be embodied as a Venturi tube. The Venturi tube can be formed such that the cross-sectional area of each of its inlet and outlet is relatively large, and the cross-sectional area of its central region is relatively narrow.

[0153] Therefore, in the neck region with a relatively narrow cross-sectional area in the central region of the mixing tube 101, the gas flow rate is the fastest in the mixing tube 101, so that the pressure can be reduced in the central region.

[0154] The mixing tube 101 can be embodied as a Venturi tube. Therefore, the pressure in the neck region is lower than the pressure in the region adjacent thereto. Therefore, due to the pressure difference, the air with a relatively high pressure in the space of the air receiving part 140 can smoothly flow into the mixing tube 101, so that it can be mixed with the gas in the mixing tube.

[0155] Figure 7 is a perspective view showing the main body 100 and the cover 200 of the burner. Figure 8 is Figure 7 exploded view of. Figure 9 is Figure 7 top view of. Figure 10 is Figure 7 bottom view of. Figure 11 is a perspective view of the main body 100. Figure 12 is Figure 11 top view of.

[0156] The main body 100 can include a lower unit 110 and a first conduit 120. The lower unit 110 can be recessed into the main body 100 from the upper surface of the main body 100 and can constitute the lower part of the mixing tube 101. The lower unit 110 can constitute approximately half of the mixing tube 101.

[0157] However, since at least a part of the upper unit 220 formed on the cover 200 is received in the recessed space of the lower unit 110, the recessed space of the lower unit 110 that constitutes the mixing tube 101 can be deeper than half of the depth of the mixing tube 101.

[0158] The first conduit 120 can be connected to the outlet of the mixing tube 101 and can have two portions that are connected to the outlet of the mixing tube 101 and extend in the circumferential direction of the main body 100 and in opposite directions respectively. A portion of the first conduit 120 can be closed by the cover 200, and fuel gas can flow in the first conduit 120. The top of the first conduit 120 can be closed by the cover 200 to form a fuel gas flow path.

[0159] The first conduit 120 can be connected to the outlet of the mixing tube 101 and can branch from the distal end of the mixing tube 101 into two portions that extend along the circumferential direction of the main body 100. Thus, as indicated by the solid arrows in Figure 12 , the fuel gas is discharged from the mixing tube 101 and can be divided into two portions corresponding to the two portions of the first conduit 120. Thus, the fuel gas can flow in two opposite directions along the two portions of the first conduit 120 and in the circumferential direction of the main body 100, and can flow through the through holes 210 of the cover 200 at the two portions of the first conduit 120.

[0160] The fuel gas is divided into two portions that flow in two opposite directions and along the circumferential direction of the main body 100, such that this portion of the fuel gas can be respectively supplied to the first flame generating portion 310 and the second flame generating portion 320 that are spaced apart from each other using one fuel gas injection hole 131 equipped with an orifice and one mixing tube 101.

[0161] The main body 100 can include a cover receiving groove 150, a first spark plug receiving hole 160, and an extension panel 170. The cover receiving groove 150 can be recessed from the upper surface of the main body 100 into the main body and can have a shape corresponding to the shape of the cover 200 such that the cover 200 is received therein.

[0162] Holes for fastening means such as bolts to be fastened therein can be formed in the bottom surface defining the cover receiving groove 150, and corresponding holes can be formed in the cover 200 such that the cover 200 can be coupled to the main body 100 using the fastening means. Since the cover 200 is disposed in the cover receiving groove 150, the cover 200 can be accurately positioned at a specified position of the main body 100.

[0163] The first spark plug receiving hole 160 can be formed at a position overlapping the cover 200, and a spark plug can be inserted and installed in the first spark plug receiving hole 160. In one example, the cover 200 can have a second spark plug receiving hole 250 defined therein, and the spark plug is inserted into the second spark plug receiving hole at a position corresponding to the first spark plug receiving hole 160.

[0164] In the illustrated embodiment, the first spark plug receiving hole 160 may be arranged to be adjacent to the first flame generating part 310 provided in the central region of the burner. In this structure, the first flame generating part 310 may be ignited first, and the second flame generating part 320 may be ignited later.

[0165] In another embodiment, the first spark plug receiving hole 160 may be arranged to be adjacent to the second flame generating part 320 provided in the outer region of the burner. In this structure, the second flame generating part 320 may be ignited first, and the first flame generating part 310 may be ignited later.

[0166] The extension panel 170 may surround the lid receiving groove 150 and extend in the circumferential direction of the main body 100. The extension panel 170 may generally be arranged in a disk shape. A hole into which a fastening device is inserted may be formed in the extension panel 170.

[0167] Therefore, by using a fastening device to couple the extension panel 170 to a gas stove or a cooking range of a combination cooking appliance, the burner can be installed on the gas stove or the combination cooking appliance.

[0168] The inclined guiding surface 121 may be formed on each of the two portions of the first conduit 120 to change the flow direction of the gas such that the gas gradually rises. The gas flowing through the first conduit 120 may rise along the two portions of the first conduit 120 that extend in the circumferential direction of the main body 100 and in opposite directions, and then may flow through the through hole 210 of the lid 200.

[0169] When the flow direction of the gas in the first conduit 120 suddenly changes from the circumferential direction of the main body 100 to the upward direction, the gas may not flow smoothly. Therefore, according to the embodiment, the inclined guiding surface 121 may be respectively formed on the two portions of the first conduit 120 that extend in the circumferential direction of the main body 100 and in opposite directions to cause smooth flow of the gas.

[0170] The inclined guiding surface 121 is preferably formed as a flat surface. However, in another embodiment, the inclined guiding surface 121 may be formed in a stepped manner having a plurality of steps. Even when the inclined guiding surface 121 is formed in a stepped manner, the gas may gradually rise along the plurality of steps.

[0171] The gas flowing through the first conduit 120 may be guided along the inclined guiding surfaces 121 respectively formed on the two portions of the first conduit 120 that extend in the circumferential direction of the main body 100 and in opposite directions so as to gradually rise. Therefore, the gas flow can be smooth.

[0172] The inclined guide surface 121 may have a constant width in the longitudinal direction. In another embodiment, the inclined guide surface 121 may become narrower as it extends in the upward direction. Conversely, the inclined guide surface 121 may become wider as it extends in the upward direction.

[0173] Figure 13 is a perspective view of the cover 200. Figure 14 is Figure 13 a bottom view of. Figure 15 is Figure 13 a top view of. The cover 200 may have a planar area smaller than that of the main body 100. As described above, the cover 200 may be disposed in the cover receiving groove 150 of the main body 100 and may be coupled to the cover 200 using fastening means.

[0174] The cover 200 may include a through hole 210 formed at a position overlapping at least a part of the first conduit 120. Combustion gas may flow through the through hole 210. For example, the through hole 210 for the combustion gas to pass through may be formed in the cover 200 at least at a portion overlapping the inclined guide surface 121.

[0175] The combustion gas gradually rising along the inclined guide surface 121 may flow through the through hole 210 and into the top of the cover 200.

[0176] The width of the through hole 210 may be equal to or greater than the width of the inclined guide surface 121.

[0177] In addition, the cover 200 may include an upper unit 220 constituting the mixing tube 101. The upper unit 220 may be formed to protrude downward toward the main body 100 and may have an internal space defined therein so as to be recessed upward from its lower surface into the upper unit 220. The internal space may constitute the upper part of the mixing tube 101.

[0178] The upper unit 220 may constitute approximately half of the mixing tube 101. However, the upper unit 220 may be inserted into a groove defined in the lower unit 110 of the main body 100 to define the mixing tube 101.

[0179] In the illustrated embodiment, the upper unit 220 may be integrally formed with the cover 200. However, in another embodiment, the upper unit 220 may be formed as a structure separate from the cover 200. In addition, in yet another embodiment, the upper unit 220 may be integrally formed with the lower unit 110.

[0180] In one example, the burner may include a second conduit 230. The second conduit 230 may be formed by joining the cover 200 and the head 300 to each other, and may provide a space in which the gas flowing from the main body 100 to this space can flow from the outer region of the head 300 to its central region.

[0181] The portion of the gas discharged from the first conduit 120 may flow through the second conduit 230 to the central region of the head 300, and may be discharged through the first flame generating portion 310 and may burn.

[0182] The cover 200 may include a through hole 210 and a lower portion 240. In addition to the above description, the through hole 210 may be connected to the first conduit 120 and allow the gas to flow through the first conduit 120. The gas may flow through the through hole 210, and then a part of it may flow into the second conduit 230, while the remaining part may flow into the second flame generating portion 320.

[0183] The through hole 210 may include a pair of through holes that are spaced apart from each other and extend in the circumferential direction and the outer region of the cover 200. Therefore, compared with the case where the gas flows into the head 300 at one position, the gas flowing through the pair of spaced-apart through holes 210 can smoothly flow into the second flame generating portion 320 or the central region of the head 300.

[0184] The lower portion 240 may be formed such that a part of it surrounds the through hole 210, and may protrude upward from the upper surface of the cover 200, and may constitute the lower part of the second conduit 230. The lower portion 240 and the upper portion 340 formed on the head 300 may be joined to each other to define the second conduit 230.

[0185] The lower portion 240 may include a first outer portion 241, a first central portion 242, and a first connecting portion 243. The first outer portion 241 may be disposed in the outer region of the cover 200 so as to surround the through hole 210, and may define a flow channel connected to the second flame generating portion 320, and may include a pair of first outer portions 241 that are arranged to be spaced apart from each other in the circumferential direction.

[0186] The portion of the gas flowing into the first outer portion 241 may rise upward and flow into the second flame generating portion 320, and the remaining part may flow into the first connecting portion 243.

[0187] The first central portion 242 may be formed in the central region of the cover 200, and may define a flow channel connected to the first flame generating portion 310.

[0188] The first connection part 243 may define a flow passage that connects the internal space of the first exterior 241 and the internal space of the first central part 242 to each other. Since the first exterior 241 includes a pair of first exteriors, the first connection part 243 may include a pair of first connection parts that are respectively connected to the pair of first exteriors 241.

[0189] Accordingly, a part of the gas flowing into the first exterior 241 may flow through the first connection part 243 toward the first central part 242. In this way, a part of the gas flowing through the through-hole 210 and into the second conduit may flow from the outer region of the cover 200 toward its central region.

[0190] The gas flowing into the first connection part 243 may rise in the first central part 242. To ensure smooth flow of the gas, the bottom surface of the first connection part 243 and the bottom surface of the first central part 242 may form a continuous plane without forming a step.

[0191] In one example, the pair of first exteriors 241 may be formed and arranged symmetrically with respect to the center of the cover 200. The pair of first connection parts 243 may be formed and arranged symmetrically with respect to the center of the cover 200.

[0192] The first central part 242 may be formed at a position overlapping the core part 370 of the head 300 in the vertical direction. Due to this structure, the gas reaching the first central part 242 may smoothly flow toward the core part 370 and reach the first flame generation part 310.

[0193] The lower part 240 may include a lower partition wall protruding upward from the upper surface of the cover 200, and the lower partition wall may surround the through-hole. The gas flowing through the through-hole may be guided along the lower partition wall so as to flow toward the first connection part 243 and the first central part 242.

[0194] The lower partition wall may form the walls of the first exterior 241, the first connection part 243, and the first central part 242. That is, the first exterior 241, the first connection part 243, and the first central part 242 may be formed by the lower partition wall protruding upward from the upper surface of the cover 200.

[0195] In one example, the cover 200 may include a second spark plug receiving hole 250 into which a spark plug is inserted and mounted. The second spark plug receiving hole 250 may be positioned at a location corresponding to the first spark plug receiving hole 160 of the main body 100. Accordingly, depending on the position of the first spark plug receiving hole 160, the second spark plug receiving hole 250 may be provided adjacent to the first flame generation part 310 or adjacent to the second flame generation part 320.

[0196] Figure 16 is a perspective view showing the cover and the head. Figure 17 isFigure 16 Exploded top view three-dimensional diagram. Figure 18 is Figure 16 Bottom-up three-dimensional view. Figure 19 is Figure 16 Top view.

[0197] Due to the use of the burner, foreign objects may remain on the head 300. Therefore, for hygienic purposes, cleaning of the head 300 is necessary. To clean the head 300, the head 300 can be easily removed from the burner.

[0198] Therefore, for example, a fastening device is required to couple the head 300 and the cover 200 or the main body 100 such that a user can easily remove the head 300 from the burner using the fastening device when needed.

[0199] A structure is required to guide the position of the head 300 such that the head 300 can be set at the correct position on the cover 200. For this guide, an insertion protrusion 372 can be formed on the head 300, and a protrusion receiving groove 260 can be formed in the cover 200.

[0200] When the insertion protrusion 372 of the head 300 is inserted into the protrusion receiving groove 260 of the cover 200, the head 300 can be set at the correct position on the cover 200. The insertion protrusion 372 and the protrusion receiving groove 260 will be additionally described below. Hereinafter, the head 300 will be described in detail.

[0201] Figure 20 Three-dimensional diagram of the head 300. Figure 21 is Figure 20 Bottom view. Figure 22 is Figure 20 Top view. Figure 23 is Figure 20 View in different directions.

[0202] The head 300 can include diffusion holes 330 and an upper part 340. The diffusion holes 330 can be connected to the through holes 210 and can allow gas to flow therein. The gas flowing into the diffusion holes 330 can flow into the second flame generating part 320 and burn therein.

[0203] The diffusion holes 330 can include a pair of diffusion holes that are respectively disposed at positions corresponding to the pair of through holes 210 in the outer region of the head 300. Since the diffusion holes 330 and the through holes 210 overlap vertically with each other, the portion of the gas that has flowed through the through holes 210 can flow through the diffusion holes 330, can diffuse along the circumferential direction of the upper surface of the head 300, and can flow into the second flame generating part 320.

[0204] The upper part 340 may be formed such that a part thereof surrounds the diffusion hole 330, may protrude downward from the lower surface of the head 300, and may be coupled to the lower part 240 to define the upper part of the second conduit 230. The lower part 240 of the cover 200 and the upper part 340 of the head 300 may be joined to each other to define the second conduit 230.

[0205] The upper part 340 may include a second outer part 341, a second central part 342, and a second connecting part 343. The second outer part 341 may surround the diffusion hole 330, may be disposed in the outer region of the head 300, may define a flow passage connected to the second flame generating part 320, and may include a pair of second outer parts spaced apart from each other in the circumferential direction.

[0206] The part of the fuel gas flowing into the second outer part 341 may rise upward and may flow into the second flame generating part 320, and the remaining part thereof may flow into the second connecting part 343.

[0207] The second central part 342 may be formed in the central region of the head 300 and may define a flow passage connected to the first flame generating part 310.

[0208] The second connecting part 343 may define a flow passage connecting the inner space of the second outer part 341 and the inner space of the second central part 342. Since the second outer part 341 includes a pair of second outer parts, the second connecting part 343 may include a pair of second connecting parts respectively connected to the pair of second outer parts 341.

[0209] An opening may be formed in the side surface of the second central part 342, and the opening may be connected to the second outer part 341 through the second connecting part 343.

[0210] In one example, the pair of second outer parts 341 may be formed and arranged symmetrically with respect to the center of the head 300. The pair of second connecting parts 343 may be formed and arranged symmetrically with respect to the center of the head 300.

[0211] The upper part 340 may include an upper partition wall protruding downward from the lower surface of the head 300, and the upper partition wall may surround the through hole 210 formed in the outer region of the cover 200. The fuel gas flowing through the through hole 210 may be guided along the upper partition wall and thus flow toward the second connecting part 343 and the second central part 342.

[0212] The upper partition wall may constitute the walls of the second outer part 341, the second connecting part 343, and the second central part 342. That is, the second outer part 341, the second connecting part 343, and the second central part 342 may be constituted by the upper partition wall protruding downward from the lower surface of the head 300.

[0213] To prevent the gas flowing into the second conduit 230 from leaking through the gap between the upper part 340 and the lower part 240, the contact surfaces that respectively constitute the upper part 340 and the lower part 240 of the partition wall and are in contact with each other may have the same shape.

[0214] Therefore, the part of the gas flowing into the second exterior 341 can flow through the second connection part 343 to the second central part 342. In this way, the part of the gas flowing into the second conduit 230 through the through-hole 210 can flow from the outer region of the cover 200 or the head 300 to its central region.

[0215] The gas that has flowed through the through-hole 210 can be divided into two parts, which can respectively flow to the first flame generation part 310 and the second flame generation part 320, and can respectively be ejected through the first flame hole 311 and the second flame hole 321, and finally, can burn.

[0216] More specifically, the gas that has flowed through the through-hole 210 can be divided into two parts. One part of it can flow through the diffusion hole 330, can reach the second flame generation part 320, and can be ejected through the second flame hole 321 and finally burn. Since the through-hole 210 and the diffusion hole 330 overlap each other in the vertical direction of the burner, this part of the gas can continue to rise through the through-hole 210 and then through the diffusion hole 330, and then can flow into the second flame generation part 320 at the top of the diffusion hole 330.

[0217] In addition, the remaining part of the gas that has flowed through the through-hole 210 can flow along the second conduit 230 from the outer region of the head 300 to the central region of the head 300, and can reach the first flame generation part 310, and can be ejected through the first flame hole 311.

[0218] The second conduit 230 may include a first space defined by combining the first exterior 241 and the second exterior 341 with each other, a second space defined by combining the first connection part 243 and the second connection part 343 with each other, and a third space defined by combining the first central part 242 and the second central part 342 with each other.

[0219] The gas flows into the first space from the exterior outside the second conduit 230, and the part of the gas flowing into the first space can flow through the second space and flow into the third space in the central region of the head 300. The gas merged in the central region of the head 300 rises, and flows through the hole defined in the central region of the head 300, and can reach the first flame generation part 310 connected to the hole.

[0220] In this way, the fuel gas that has flowed through the through-hole 210 can be divided into two parts in the second conduit 230. One part can reach the first flame generation part 310, and the other part can reach the second flame generation part 320.

[0221] The first flame generation part 310 can be provided in the central region of the head 300 and can protrude upward from the upper surface of the head 300. In addition, the second flame generation part 320 can protrude upward from the upper surface of the head 300 in the outer region of the head 300. Therefore, the second flame generation part 320 can surround the first flame generation part 310.

[0222] The head 300 can include a fuel gas diffusion part 350 and a flame propagation part 360. The fuel gas diffusion part 350 can be embodied as a space in which the fuel gas flowing through the diffusion holes 330 diffuses, and this space is surrounded by the upper surface of the head 300 and the second flame generation part 320 and can extend along the periphery of the head 300.

[0223] The fuel gas diffusion part 350 can be embodied as a space connected to the second flame generation part 320, can extend in an annular shape with a constant width, and can be located inside the second flame generation part 320. Therefore, the fuel gas that has flowed through the diffusion holes 330 can diffuse along the fuel gas diffusion part 350 and on the upper surface of the head 300 and uniformly flow into the second flame generation part 320 in the circumferential direction of the second flame generation part 320.

[0224] An inclined diffusion surface 361 can be provided at a position adjacent to the diffusion holes 330 to promote the flow and diffusion of the fuel gas. That is to say, the inclined diffusion surface 361 can be defined on the upper surface of the head 300 and in the region where the diffusion holes 330 and the fuel gas diffusion part 350 are connected to each other, and can form each of the two opposite ends of the diffusion holes 330. The inclined diffusion surface 361 can be inclined in the circumferential direction or the radial direction.

[0225] The inclined diffusion surface 361 can be formed on the upper surface of the head 300 to be inclined in the circumferential direction or the radial direction. Due to the inclined diffusion surface 361, the planar area size of the diffusion holes 330 can increase as the diffusion holes 330 extend upward.

[0226] Therefore, although the fuel gas flowing into the fuel gas diffusion part 350 through the diffusion holes 330 can further flow upward, the fuel gas can be guided along the inclined diffusion surface 361 so as to smoothly diffuse into the fuel gas diffusion part 350 and then be uniformly distributed throughout the fuel gas diffusion part 350. As a result, the second flame generation part 320 can receive a uniform fuel gas supply in its circumferential direction, thereby generating a uniform flame in its circumferential direction.

[0227] The flame propagation part 360 can occupy a partial area of the fuel gas diffusion part 350, such that the fuel gas diffusion part 350 can be discontinuous at the flame propagation part 360. The flame propagation part 360 can be embodied as a space where the flame propagates between the first flame generation part 310 and the second flame generation part 320.

[0228] The flame propagation part 360 can be used as a passage for supplying secondary air (external air) to the first flame generation part 310. The flame propagation part 360 can be embodied as a space extending through the second flame generation part 320. Therefore, the secondary air outside the second flame generation part 320 can be smoothly introduced into the first flame generation part 310 through the flame propagation part 360.

[0229] In one example, even near the first flame generation part 310, the secondary air can directly flow into the first flame generation part 310.

[0230] In addition, a flame can be generated in the flame propagation part 360, and the flame can flow from the first flame generation part 310 to the second flame generation part 320, or from the second flame generation part 320 through the flame propagation part 360 to the first flame generation part 310.

[0231] Therefore, the flame generated in the first flame generation part 310 can flow to the second flame generation part 320, or conversely, the flame generated in the second flame generation part 320 can flow to the first flame generation part 310. Therefore, while the fuel gas is supplied to the first flame generation part 310 and the second flame generation part 320, a flame can always exist in the first flame generation part 310 and the second flame generation part 320.

[0232] When the flame is not ignited or is extinguished in one flame generation part, the flame of the other flame generation part can flow through the propagation part, thereby generating a flame in the flame generation part without a flame.

[0233] The head 300 may include a diffusion part defining protrusion 362 and a propagation part defining protrusion 363. The diffusion part defining protrusion 362 may be disposed between the first flame generation part 310 and the second flame generation part 320, protrude upward from the upper surface of the head 300, extend in the circumferential direction of the head 300, and surround the gas diffusion part 350.

[0234] The gas diffusion part 350 may be embodied as a space surrounded by the second flame generation part 320, the upper surface of the head 300, the diffusion part defining protrusion 362, and the outer cap 410.

[0235] The propagation part defining protrusion 363 may protrude upward from the upper surface of the head 300, and may include a pair of propagation part defining protrusions respectively disposed on two opposite sides of the flame propagation part 360 to define the flame propagation part 360. The propagation part defining protrusion 363 may isolate the gas diffusion part 350 and the flame propagation part 360 from each other.

[0236] Referring to Figure 23 , the propagation part defining protrusion 363 may be formed to be inclined in the radial direction of the head 300. For example, as the propagation part defining protrusion 363 extends inward in the radial direction of the head 300, the height of the propagation part defining protrusion 363 in the vertical direction may become smaller. In other words, as the flame propagation part 360 extends inward in the radial direction of the head 300, the depth of the flame propagation part 360 defined by the propagation part defining protrusion 363 may become smaller.

[0237] The propagation part defining protrusion 363 may have a through hole extending therethrough such that the gas in the gas diffusion part 350 is discharged through the through hole to the flame propagation part 360. A flame may be generated at the outlet of the through hole, and then, the flame may propagate through the flame propagation part 360 from the first flame generation part 310 to the second flame generation part 320, and vice versa.

[0238] Figure 24 is Figure 23 an enlarged view of part 24 of Figure 24 shows the first flame generation part 310. Figure 25 is Figure 23 an enlarged view of part 25 of Figure 25 shows the second flame generation part 320.

[0239] The flame generation part may include flame holes through which gas is ejected. A flame may be generated at the outlet of the flame holes. The first flame generation part 310 may include first flame holes 311, and the second flame generation part 320 may include second flame holes 321.

[0240] The first flame hole 311 or the second flame hole 321 may be recessed into the upper end of the first flame generating portion 310 or the second flame generating portion 320. The first flame hole 311 may be covered with the inner cap 420, and the second flame hole 321 may be covered with the outer cap 410, such that the top of each of the first flame hole and the second flame hole can be blocked.

[0241] The recessed depths of adjacent flame holes in the first flame generating portion 310 or the second flame generating portion 320 may be different from each other. For example, the first flame generating portion 310 may have deep first flame holes 311a and shallow first flame holes 311b that are alternately arranged along the perimeter. Deep second flame holes 321a and shallow second flame holes 321b may be alternately arranged along the perimeter of the second flame generating portion 320.

[0242] The recessed depth of the flame hole may be proportional to the amount of combustion gas discharged to the outside through the flame hole. In addition, the size and length of the flame may be proportional to the amount of combustion gas discharged through the flame hole.

[0243] Therefore, the deeper the recessed depth of the flame hole, the larger the size of the flame generated at the outlet of the flame hole. As the size of the flame increases, the possibility of adjacent flames merging with each other increases.

[0244] When the size of the flame becomes larger due to merging, the combustion gas inside the flame may not contact the air, which may lead to incomplete combustion of the combustion gas. Therefore, it is necessary to prevent this merging to prevent incomplete combustion.

[0245] In an embodiment, relatively deep flame holes may be provided between relatively shallow flame holes. Due to this structure, the spacing between large flames that are highly likely to merge with each other can be increased, and relatively small flames can be placed between them, thereby effectively preventing the merging between adjacent flames.

[0246] In addition, when the flame generating portion is only formed to have relatively shallow flame holes, the amount of combustion gas discharged from the flame generating portion is small, such that the burner cannot generate sufficient firepower. In an embodiment, a plurality of relatively deep flame holes may be arranged such that the combustion gas can be sufficiently discharged to the outside through the flame holes.

[0247] Figure 26 is a perspective view showing a state in which the outer cap 410 and the inner cap 420 are mounted on the head 300. Figure 27 is Figure 26 of the figure. Figure 28 is Figure 27 an enlarged view of part 28 of. Figure 29 is a perspective view showing the inner cap 420.

[0248] The burner may include an outer cap 410 covering the flame generating portion and an inner cap 420. The outer cap 410 may be disposed at the upper end of each of the second flame generating portion 320 and the diffusion portion defining protrusion 362, and may cover the gas diffusion portion 350. The outer cap 410 may be disposed on the head 300 and cover the upper end of the gas diffusion portion 350.

[0249] Referring Figure 27 , the outer cap 410 may have an inclined cross-sectional shape. For example, the outer cap 410 may be formed such that its cross-sectional shape gradually slopes upward as the outer cap extends radially outward.

[0250] The inner cap 420 may be disposed on the upper end of the first flame generating portion 310, and may cover the upper end of the first flame generating portion 310 and the upper end of the space where the gas merges and flows toward the first flame generating portion 310.

[0251] The head 300 may include a core portion 370, a side portion 380, and a support member 390. The core portion 370 may be disposed in the central region of the head 300, and the first flame generating portion 310 may be formed at the upper end of the core portion. The inner cap 420 may be disposed on the upper end of the core portion 370.

[0252] The side portion 380 occupies the outer region of the head 300, and the gas diffusion portion 350 may be defined in the side portion 380. The core portion 370 and the side portion 380 may be arranged to be spaced apart from each other, and may be connected to each other via the support member 390 and a pair of second connecting portions 343.

[0253] The support member 390 may connect the core portion 370 and the side portion 380 to each other, and may support the core portion 370. The pair of second connecting portions 343 and the support member 390 may connect the core portion 370 and the side portion 380 to each other, and may be spaced apart from each other in the circumferential direction. A space may be defined between each of the pair of second connecting portions 343 and the support member 390.

[0254] The first flame generating portion 310 may be formed to protrude from the outer region of the core portion 370. In the core portion 370 and in the region inside the first flame generating portion 310, a space may be defined in which the portions of the gas flowing into the core portion 370 through the second conduit 230 merge with each other.

[0255] The core portion 370 may include a plurality of guiding protrusions 371 that protrude upward and are spaced apart from each other in the circumferential direction, and guide the installation position of the inner cap 420. The inner cap 420 may include a guiding ring 421 that protrudes downward and is formed to surround and contact the guiding protrusions 371.

[0256] In order to stably set the inner cap 420 on the upper end of the core part 370, a guiding protrusion 371 can be formed on the core part 370, and a guiding ring 421 can be formed on the inner cap 420.

[0257] The guiding protrusion 371 can include a plurality of guiding protrusions spaced apart from each other in the circumferential direction. When the inner cap 420 is placed on the core part 370, the guiding protrusion 371 can be located inside the guiding ring 421 so as to contact the guiding ring. The position of the inner cap 420 can be guided along the guiding protrusion 371, and thus it can be prevented from being laterally deviated from the core part 370.

[0258] Due to this structure, the inner cap 420 can be stably set at the designed position on the upper end of the core part 370 and can maintain its position.

[0259] The core part 370 can include a supporter 373 that contacts the lower surface of the inner cap 420 and supports the inner cap 420. The supporter 373 can be formed to gradually incline upward as the support extends toward the inside of the core part 370. The inner cap 420 can be set on the upper surface of the supporter 373.

[0260] The guiding protrusion 371 can be formed to protrude from the upper end of the supporter 373. Each of the lower surface and the upper surface of the supporter 373 can extend along a substantially straight line.

[0261] The gas discharged from the flame holes of the first flame generation part 310 or the second flame generation part 320 can be mixed with the secondary air around the flame generation part to improve the combustion efficiency. Since the second flame generation part 320 is provided in the outer region of the burner, the gas discharged from the second flame hole 321 can actively contact the surrounding secondary air.

[0262] However, since the first flame generation part 310 can be provided on the core part 370 (which is provided in the central region of the burner), its contact area with the surrounding air may be reduced due to the outer cap 410 and other structures.

[0263] Considering this problem, according to an embodiment, the vertical height of the first flame generation part 310 can be higher than the vertical height of the diffusion part defining protrusion 362. Due to this structure, the vertical height of the first flame generation part 310 can be higher than the vertical height of the outer cap 410. Therefore, the contact area between the first flame generation part 310 and the surrounding air can be increased.

[0264] Therefore, the first flame generation part 310 smoothly contacts the surrounding air, so that the gas discharged from the first flame generation part 310 smoothly receives the surrounding secondary air, thereby preventing incomplete combustion caused by insufficient supply of secondary air.

[0265] The core part 370 may include an insertion protrusion 372 that protrudes downward and is inserted into a groove defined in the cover 200. The cover 200 may include a protrusion receiving groove 260 that is recessed from the upper surface of the cover into the cover and is formed in a region corresponding to the insertion protrusion 372. The insertion protrusion 372 may be inserted into the protrusion receiving groove 260. The insertion protrusion 372 may include at least one insertion protrusion 372. The protrusion receiving groove 260 may include at least one protrusion receiving groove 260.

[0266] In order to facilitate the attachment of the head 300 to the cover 200 and its detachment from the cover 200, and at the same time for the head and the cover to be coupled to each other at the designed position, a structure is needed to guide their positions. Therefore, the core part 370 may be provided with the insertion protrusion 372, and the cover 200 may be provided with the protrusion receiving groove 260.

[0267] Due to this structure, the head 300 can be stably set at the designed position on the upper end of the cover 200 and can maintain its position.

[0268] Figure 30 It is a diagram for showing the flow of gas in a burner according to an embodiment. In one embodiment, the gas discharged from a mixing tube 101 may flow into a first conduit 120 and a second conduit 230. In the first conduit 120, the gas may be divided into two parts flowing in opposite directions and in the circumferential direction. Then, the two parts may flow through the cover. Then, a part of each of the two parts may flow to a second flame generating part 320 provided in the outer region of the burner, while the remaining part may flow to a first flame generating part 310 provided in the central region of the burner.

[0269] Specifically, when the gas flows through the mixing tube 101, the gas may be mixed with the primary air. Then, the mixture of the gas and the air may be discharged from the mixing tube 101 and then flow into the first conduit 120. In the first conduit 120, the gas may be divided into two parts flowing in opposite directions and in the circumferential direction of the body.

[0270] The position where the first conduit 120 and the mixing tube 101 meet may be the position where two parts of the first conduit 120 extending in opposite directions and in the circumferential direction of the body meet. Therefore, the gas may be divided into two parts in a manner corresponding to the two parts of the first conduit 120 and may flow in the circumferential direction. The two parts of the gas flowing in opposite directions and in the circumferential direction may respectively flow through a pair of through holes 210 spaced apart from each other and may flow into the second conduit 230.

[0271] The gas flowing into the second conduit 230 can be divided into two parts, and the two parts can be respectively supplied to the first flame generation part 310 and the second flame generation part 320.

[0272] The part of the gas flowing into the second conduit 230 can flow through the diffusion holes 330, and can diffuse on the upper surface of the head 300 in the gas diffusion part 350, and can uniformly flow into the second flame generation part 320 along the periphery of the second flame generation part 320 provided in the outer region of the head 300, and then can be discharged through the second flame holes 321, and can burn to generate an outer flame.

[0273] The remaining part of the gas flowing into the second conduit 230 can flow through the space defined by the first connection part 243 and the second connection part 343 to the central region of the head 300, and can flow upward in the central region of the head 300, and can flow into the first flame generation part 310, and can be discharged through the first flame holes 311, and can burn to generate an inner flame.

[0274] In an embodiment, the gas discharged from a single mixing tube 101 can be divided into multiple parts, and these parts can be respectively supplied to multiple flame generation parts radially spaced apart from each other in the burner. Due to this structure, the flow channels for supplying gas to the flame generation parts can be integrated with each other. The gas can be supplied to the burner using a single supply pipe, and the flow channel structure in the burner can be simplified.

[0275] Generally, the burner can be provided with multiple flame generation parts. The annular flame generation parts can be arranged to be spaced apart from each other in the radial direction of the burner.

[0276] In this structure, a structure is needed to enable the flame to propagate from one flame generation part to another flame generation part. For example, at the initial ignition, the flame can be first generated in one of the multiple flame generation parts, and then, the generated flame can propagate from there to another flame generation part to generate a flame.

[0277] In addition, when the flame is extinguished in any one of the multiple flame generation parts due to interference such as wind, the flame of another burning flame generation part can propagate to the extinguished flame generation part, so that the flame is generated again in the extinguished flame generation part.

[0278] Therefore, a propagation structure that can enable the flame to propagate between adjacent flame generation parts among the multiple flame generation parts is needed. This flame propagation structure allows the flame to propagate smoothly between the flame generation parts. In addition, the propagation structure needs to have a structure that prevents the increase of incomplete combustion.

[0279] To achieve the above object, the burner according to the embodiment may be provided with a flame propagation part 360 for causing a flame to propagate between adjacent flame generation parts among a plurality of flame generation parts. Hereinafter, the flame propagation part 360 will be described in detail.

[0280] Figure 31 is an enlarged top view of the flame propagation part 360 of the head 300. Figure 32 is a view showing a state in which the outer cap 410 and the inner cap 420 are mounted on Figure 31 the head 300 therein.

[0281] The head 300 may include a first flame generation part 310 provided in a central region of the head 300 and having a plurality of first flame holes 311 arranged along its periphery. In addition, the head 300 may include a second flame generation part 320 which may be provided in an outer region of the head 300 and may be arranged to surround the first flame generation part 310 and have a plurality of second flame holes 321 arranged along its periphery.

[0282] The flame propagation part 360 may be embodied as a space in which a flame propagates between the first flame generation part 310 and the second flame generation part 320. A flame may be generated in the flame propagation part 360, and the generated flame may flow toward the first flame generation part 310 or the second flame generation part 320.

[0283] When the burner is first ignited, the flame may propagate along the flame propagation part 360 so that both the first flame generation part 310 and the second flame generation part 320 can be ignited.

[0284] For example, in an example where the spark plug is located at a position adjacent to the first flame generation part 310, when the spark plug operates, a flame may be generated in the first flame generation part 310, and then the flame generated in the first flame generation part 310 may propagate along the flame propagation part 360 to ignite the second flame generation part 320.

[0285] Conversely, in another example where the spark plug is located at a position adjacent to the second flame generation part 320, when the spark plug operates, a flame may be generated in the second flame generation part 320, and then the flame generated in the second flame generation part 320 may propagate along the flame propagation part 360 to ignite the first flame generation part 310.

[0286] In addition, for example, when the burner is operating in a simmering mode in which the burner produces a low heat flame, the amount of gas discharged is small, and the size of the flame is also small, such that the flame of any one of the plurality of flame generating portions may be extinguished due to interference such as wind.

[0287] When the flame of the first flame generating portion 310 is extinguished due to interference, the flame generated in the second flame generating portion 320 can propagate along the flame propagation portion 360 to re-ignite the first flame generating portion 310. Conversely, when the flame in the second flame generating portion 320 is extinguished due to interference, the flame generated in the first flame generating portion 310 can propagate along the flame propagation portion 360 to re-ignite the second flame generating portion 320.

[0288] The head 300 may include a propagation portion defining protrusion 363 that protrudes upward from the upper surface of the head and includes a pair of propagation portion defining protrusions disposed on two opposite sides of the flame propagation portion 360 to define the flame propagation portion 360 therebetween. The propagation portion defining protrusion 363 may include a propagation hole 3631 for discharging gas to the flame propagation portion 360.

[0289] The propagation portion defining protrusion 363 may have a longitudinal direction equivalent to the radial direction of the head 300. The pair of propagation portion defining protrusions 363 may be arranged to be spaced apart from each other in the circumferential direction of the head 300. The propagation portion defining protrusion 363 may spatially isolate the gas diffusion portion 350 and the flame propagation portion 360 from each other.

[0290] The propagation hole 3631 may be formed to extend through the propagation portion defining protrusion 363 and may be recessed from the upper surface of the propagation portion defining protrusion 363 into the propagation portion defining protrusion. The propagation portion defining protrusion 363 may have an open upper end covered by an outer cap 410.

[0291] The gas diffusion portion 350 and the flame propagation portion 360 may be connected to each other via the propagation hole 3631. Thus, the gas filling the gas diffusion portion 350 can be discharged through the propagation hole 3631 to the flame propagation portion 360. The flame in the first flame generating portion 310 or the second flame generating portion 320 can propagate from the outlet of the propagation hole 3631 such that the gas can be ignited and burned.

[0292] The flame propagation portion defining protrusion 363 may include a first protrusion 363a and a second protrusion 363b. The first protrusion 363a may be spaced apart from the second protrusion 363b in the circumferential direction and may define a flame propagation portion 360. The second protrusion 363b may be spaced apart from the first protrusion 363a in the circumferential direction. The flame propagation portion 360 may be defined between the first protrusion 363a and the second protrusion 363b.

[0293] The flame propagation portion defining protrusion 363 may include a pair of protrusions, namely, a first protrusion 363a and a second protrusion 363b. A propagation hole 3631 may be defined in each of the first protrusion 363a and the second protrusion 363b. The propagation holes 3631 defined in the first protrusion 363a and the second protrusion 363b, respectively, may be positioned asymmetrically with respect to each other.

[0294] The propagation hole 3631 may be recessed into the upper end of the flame propagation portion defining protrusion 363 so as to extend through the flame propagation portion defining protrusion 363. The number and orientation of the propagation holes 3631 formed in the first protrusion 363a may be different from the number and orientation of the propagation holes 3631 formed in the second protrusion 363b.

[0295] The propagation hole 3631 may include a plurality of first propagation holes 3631a formed in the first protrusion 363a and second propagation holes 3631b formed in the second protrusion 363b. However, in the drawings of the embodiments, a single second propagation hole 3631b is shown. However, in some other embodiments, the number of the second propagation holes 3631b may be at least two.

[0296] In a case where a plurality of propagation holes 3631 connected to the flame propagation portion 360 are formed, compared with a case where only one propagation hole 3631 connected to the flame propagation portion 360 is formed, the flame can be easily propagated even when the burner operates at low heat.

[0297] However, when a plurality of propagation holes 3631 are formed, the distance between the propagation holes 3631 may become smaller, and thus a flame merging phenomenon may occur. For this reason, the plurality of first propagation holes 3631a may be formed such that the distance between adjacent first propagation holes increases as each of the first propagation holes 3631a extends from its inlet to its outlet (i.e., extends toward the flame propagation portion 360).

[0298] Therefore, the spacing between the flames at the outlets of the first propagation holes 3631a where flames can be generated may be sufficiently larger such that the occurrence of flame merging can be prevented.

[0299] Each of the plurality of first propagation holes 3631a may extend in its longitudinal direction, which may be inclined with respect to the circumferential direction. Conversely, the second propagation holes 3631b may extend along their longitudinal direction, which may be parallel to the circumferential direction. Accordingly, the length of the first propagation holes 3631a in the longitudinal direction may be greater than the length of the second propagation holes 3631b in the longitudinal direction.

[0300] The first propagation holes 3631a may be symmetrically positioned with respect to each other around the circumferential direction of the head. The plurality of first propagation holes 3631a may connect the gas diffusion part 350 and the flame propagation part 360 to each other. Based on the flow direction of the gas, the point where the first propagation holes 3631a are connected to the gas diffusion part 350 may be the inlet of the first propagation holes 3631a, and the point where they are connected to the flame propagation part 360 may be the outlet of the first propagation holes 3631a.

[0301] The plurality of first propagation holes 3631a may be positioned such that as each of the first propagation holes 3631a extends from its inlet to its outlet, the distance between its adjacent first propagation holes may increase.

[0302] That is, the spacing between the gas outlets of the first propagation holes 3631a (where the gas is discharged from and where the first propagation holes 3631a are connected to the flame propagation part 360) may be greater than the spacing between the gas inlets of the first propagation holes 3631a (where the gas flows into and where the first propagation holes 3631a are connected to the gas diffusion part 350). Such a structure may prevent the merging of the flames discharged from adjacent first propagation holes 3631a.

[0303] The flame propagating from the first flame generation part 310 or the second flame generation part 320 may ignite the gas at the gas outlets of the first propagation holes 3631a to generate a flame. In this regard, when the spacing between the outlets of the first propagation holes 3631a is small, merging may occur between the flames that may be generated at the outlets of the first propagation holes 3631a.

[0304] When merging occurs, the volume of the flame increases, such that air may not be supplied to the flame, thereby increasing the possibility of incomplete combustion in the flame. Accordingly, the emission of carbon monoxide, which is a product of the incomplete combustion of the gas, may increase. Carbon monoxide is a harmful substance. Therefore, its generation needs to be prevented.

[0305] Therefore, in order to reduce the occurrence of incomplete combustion in the flame propagation part 360, it is necessary to prevent the merging of the flames generated at the gas outlets of the plurality of first propagation holes 3631a, respectively.

[0306] As described above, the first propagation hole 3631a according to the embodiment may be configured such that the distance in the radial direction of the head 300 between the gas outlets of the first propagation hole 3631a where flames can be generated may be large. Due to this structure, the merging between the flames generated in adjacent first propagation holes 3631a can be effectively prevented.

[0307] As described above, the first propagation hole 3631a may include a pair of first propagation holes 3631a spaced apart from each other in the radial direction of the head 300. In this regard, the second propagation hole 3631b may be provided between the pair of first propagation holes 3631a along the radial direction of the head 300.

[0308] The point where the second propagation hole 3631b is connected to the flame propagation part 360 may become a gas outlet through which the gas input from the gas diffusion part 350 is discharged. The flame propagating from the first flame generation part 310 or the second flame generation part 320 may ignite the gas at the gas outlet to generate a flame.

[0309] Due to this structure, in the flame propagation part 360, a plurality of first propagation holes 3631a and second propagation holes 3631b may be alternately arranged with each other in the longitudinal direction of the flame propagation part 360 (i.e., in the radial direction of the head 300). Flames may be generated at the outlets of the plurality of first propagation holes 3631a and second propagation holes 3631b.

[0310] The flame may move in the longitudinal direction of the flame propagation part 360, so it can propagate between the first flame generation part 310 and the second flame generation part 320. Therefore, according to the embodiment, a plurality of first propagation holes 3631a and second propagation holes 3631b may be alternately arranged with each other in the longitudinal direction of the flame propagation part 360, so that a plurality of flames respectively generated at the outlets of the plurality of first propagation holes 3631a and the outlets of the second propagation holes 3631b may be arranged with a small distance between each other.

[0311] Therefore, the flame propagation part 360 may have a plurality of positions arranged along the longitudinal direction of the flame propagation part 360, and flames are generated at these positions, so that the flames can easily propagate along the flame propagation part 360. Therefore, the initial ignition or re - ignition of the first flame generation part 310 and the second flame generation part 320 can be promoted.

[0312] In addition, the first propagation hole 3631a and the second propagation hole 3631b may be alternately arranged with each other in the length direction of the flame propagation part 360. In other words, the first propagation hole 3631a and the second propagation hole 3631b may not overlap each other in the circumferential direction of the head.

[0313] This structure can effectively prevent the merging of flames generated at the outlets of the first propagation hole 3631a and the second propagation hole 3631b respectively, thereby reducing the occurrence of incomplete combustion. However, when the first propagation hole 3631a and the second propagation hole 3631b overlap with each other in the circumferential direction of the head, the merging of flames generated at the outlets of the first propagation hole 3631a and the second propagation hole 3631b may occur.

[0314] Figure 33 is an enlarged perspective view of the flame propagation portion 360 of the head 300. The second flame generation portion 320 can project upward from the upper surface of the head 300 in the outer region of the head 300. The second flame generation portion 320 can be connected to the propagation portion defining protrusion 363 at its end.

[0315] The head 300 can include a gas diffusion portion 350 and a diffusion portion defining protrusion 362. The gas diffusion portion 350 can be embodied as a space surrounded by the upper surface of the head 300 and the second flame generation portion 320, and can extend along the periphery of the head 300. The gas diffusion portion 350 can be isolated from the flame propagation portion 360 via the propagation portion defining protrusion 363.

[0316] The diffusion portion defining protrusion 362 can be provided between the first flame generation portion 310 and the second flame generation portion 320, and can project upward from the upper surface of the head 300. The diffusion portion defining protrusion 362 can extend in the circumferential direction of the head 300 and can surround the gas diffusion portion 350.

[0317] The propagation portion defining protrusion 363 can have one end connected to the second flame generation portion 320 and the other end connected to the diffusion portion defining protrusion 362. Due to this structure, the gas diffusion portion 350 can be defined by the second flame generation portion 320, the propagation portion defining protrusion 363, and the diffusion portion defining protrusion 362.

[0318] The propagation portion defining protrusion 363 can be connected to the second flame generation portion 320 and the diffusion portion defining protrusion 362 that project from the upper surface of the head, and can spatially separate the gas diffusion portion 350 and the flame propagation portion 360 from each other.

[0319] The diffusion portion defining protrusion 362 can include a gas discharge hole 3621, which can be recessed from the upper surface of the diffusion portion defining protrusion 362 into the diffusion portion defining protrusion 362, and can be defined at a position adjacent to the propagation portion defining protrusion 363. The gas discharge hole 3621 can be connected to the gas diffusion portion 350.

[0320] The gas discharge hole 3621 may have an inlet connected to the gas diffusion part 350 and an outlet pointing to the first flame generation part 310. The upper end of the gas discharge hole 3621 may be covered with an outer cap 410.

[0321] The gas may burn at the outlet of the gas discharge hole 3621 to generate a flame. When the first flame generation part 310 is not ignited, the flame generated in the gas discharge hole 3621 may spread to the first flame hole 311 of the first flame generation part 310 facing the gas discharge hole 3621, thereby igniting the gas discharged from the first flame hole 311.

[0322] Preferably, the length of the gas discharge hole 3621 in the circumferential direction is less than or equal to the radial width of the diffusion part defining protrusion 362.

[0323] When the length of the gas discharge hole 3621 in the circumferential direction is larger than the radial width of the diffusion part defining protrusion 362, the size of the flame generated at the outlet of the gas discharge hole 3621 increases. Therefore, the flame of the gas discharge hole 3621 consumes a large amount of air, making the amount of secondary air possibly insufficient at the outlet of the first flame hole 311 of the first flame generation part 310 facing the gas discharge hole 3621. Therefore, the shape of the flame in the first flame generation part 310 may become unstable.

[0324] Refer again to Figure 31 , the outer cap 410 may be provided on the upper end of each of the second flame generation part 320, the propagation part defining protrusion 363, and the diffusion part defining protrusion 362 so as to cover the flame propagation part 360 and the gas diffusion part 350.

[0325] In addition, the inner cap 420 may be provided on the upper end of the first flame generation part 310 and may cover the first flame hole 311 and the internal space in the first flame generation part 310 where the gas flows.

[0326] In addition, the outer cap 410 may cover the upper end of each of the propagation hole 3631 and the gas discharge hole 3621, so that the part of the gas in the gas diffusion part 350 can be discharged to the outlet of each of the propagation hole 3631 and the gas discharge hole 3621 and can burn to generate a flame. The outer cap 410 can prevent the flame from spreading to the gas diffusion part 350.

[0327] Refer to Figure 33, the propagation part defining protrusion 363 may include a flame guiding part 3632. The flame guiding part 3632 may be formed by cutting a part of the outer end of the propagation part defining protrusion 363 that is connected to the second flame generating part 320, and may guide the flame of the second flame generating part 320 to the flame propagation part 360.

[0328] The flame guiding part 3632 may be formed by cutting a part of the outer end of the propagation part defining protrusion 363 that is connected to the second flame generating part 320, such that a step is formed in the outer end of the propagation part defining protrusion 363. The flame of the second flame hole 321 may travel through the flame guiding part 3632 and then may flow into the flame propagation part 360.

[0329] The flame generated at the outlet of the second flame hole 321 of the second flame generating part 320 may flow through the flame guiding part 3632 into the flame propagation part 360. Therefore, when the flame can be generated in the second flame generating part 320, the flame may flow through the flame guiding part 3632 into the flame propagation part 360. Thus, the flame may be generated at the outlets of the propagation hole 3631 and the gas discharge hole 3621.

[0330] Figure 34 is a diagram for showing the flow of gas in the flame propagation part 360 of the head 300. In Figure 34 , the solid arrows indicate the flow of gas. The gas may flow from the gas diffusion part 350 to the flame propagation part 360 through the propagation hole 3631. The gas may be discharged from the gas diffusion part 350 toward the first flame generating part 310 through the gas discharge hole 3621.

[0331] In addition, the gas discharged from the second flame hole 321 may flow through the flame guiding part 3632 to the flame propagation part 360. Due to this structure, the gas may flow from the gas diffusion part 350 to the flame propagation part 360. Moreover, in the flame propagation part 360, the gas may freely flow in two opposite directions (i.e., the inward direction from the outer region to the central region of the head 300 or the outward direction from the central region to the outer region).

[0332] Therefore, when the flame is first generated in the second flame hole 321, the flame may flow through the flame guiding part 3632 into the outer end of the flame propagation part 360, and then may propagate along the flame propagation part 360 to the central region of the head 300. During this process, the flame may be sequentially generated in the propagation hole 3631 and the gas discharge hole 3621.

[0333] Conversely, when the flame is first generated in the gas discharge hole 3621, the flame can propagate to the flame propagation part 360 and can propagate along the flame propagation part 360 to the outer region of the head 300. During this process, the flame can be generated in the propagation hole 3631. In addition, the flame can pass through the flame guiding part 3632 from the outer end of the flame propagation part 360 to the second flame hole 321, so that the flame can be generated in the second flame hole 321.

[0334] Hereinafter, the flame propagation process is described. First, in the case where the first flame generation part 310 has been ignited and the second flame generation part 320 has been extinguished, the flame propagation process is as follows. The flame in the first flame hole 311 can propagate to the gas discharge hole 3621, resulting in the generation of a flame in the gas discharge hole 3621.

[0335] Then, the flame can propagate to the flame propagation part 360, so that the flame can be sequentially generated in the plurality of propagation holes 3631 along the direction from the central region of the head 300 to its outer region. The flame in the outer region of the head 300 can pass through the flame guiding part 3632 to the second flame hole 321, thereby generating a flame in the second flame hole 321.

[0336] The flame adjacent to the flame propagation part 360 in the second flame hole 321 can propagate along the periphery of the second flame generation part 320, and finally, the flame can be generated in the entire plurality of second flame holes 321 arranged along the periphery of the second flame generation part 320.

[0337] Next, in the case where the second flame generation part 320 has been ignited and the first flame generation part 310 has been extinguished, the flame propagation process is as follows. The flame in the second flame hole 321 can pass through the flame guiding part 3632 to the flame propagation part 360.

[0338] The flame in the flame propagation part 360 can propagate from the outer region of the head 300 towards its central region. Therefore, the flame can be sequentially generated in the plurality of propagation holes 3631 along the direction from the outer region of the head 300 to its central region. The flame can propagate to the gas discharge hole 3621, resulting in the generation of a flame in the gas discharge hole 3621.

[0339] The flame can propagate from the gas discharge hole 3621 or the propagation hole 3631 to the first flame hole 311. Therefore, the flame can be generated in the first flame hole 311 of the first flame generation part 310 facing the gas discharge hole 3621 or the propagation hole 3631.

[0340] The flame of the first flame hole 311 can spread along the periphery of the first flame generation part 310, and finally, the flame can be generated in the entire plurality of first flame holes 311 arranged along the periphery of the first flame generation part 310.

[0341] According to an embodiment, since the gas discharge hole 3621, the propagation hole 3631, and the flame guiding part 3632 are arranged to be spaced apart from each other in the radial direction of the head 300, the flame can smoothly spread from the first flame generation part 310 to the second flame generation part 320, and vice versa.

[0342] Due to the smooth flame propagation between the first flame generation part 310 and the second flame generation part 320, any extinguished flame generation part can be immediately re - ignited. Therefore, the performance of the burner can be improved.

[0343] Second Embodiment

[0344] Figure 35 is a perspective view showing a burner according to another embodiment. Figure 36 is Figure 35 a side view of Figure 37 is Figure 35 a rear view of. The burner according to the embodiment may include a main body 500, a cover 600, a head 700, an inner cap 820, and an outer cap 810.

[0345] The main body 500 may constitute the lower part of the burner and may be connected to an external source through a pipe so that the main body can receive the gas required for combustion from the external source. The cover 600 may be disposed on the top of the main body 500 and may be coupled to the main body 500 to define a mixing pipe 501 in which the gas and air flow and mix with each other.

[0346] In the illustrated embodiment, the cover 600 and the main body 500 are manufactured separately from each other. However, in another embodiment, the cover 600 and the main body 500 may be integrated into a single main body.

[0347] The mixing pipe 501 may be embodied as a space in the burner. The gas flowing from the external source to the burner and the air flowing into the burner from the surrounding environment of the burner may meet and mix with each other in the mixing pipe 501. The gas can be mixed with the air, so it can receive oxygen from the air required for combustion and thus can burn in the head 700.

[0348] The mixing pipe 501 may be formed by combining the main body 500 and the cover 600 with each other. The main body 500 may constitute approximately the lower half of the mixing pipe 501, while the cover 600 may constitute approximately the upper half of the mixing pipe 501.

[0349] The head 700 can be disposed on top of the cover 600, and a flame can be generated in the head 700. The head 700 can be coupled to the cover 600 to form a path through which the fuel gas flowing into the head 700 and the cover 600 through the main body 500 can flow. The fuel gas flow path formed by combining the head and the cover 600 with each other can distribute the fuel gas to the first flame generation part 710 and the second flame generation part 720, which will be described in detail below.

[0350] The inner cap 820 can cover the top of the first flame generation part 710 where the flame can be generated, and can control the diffusion direction of the flame so that the flame is guided outward in the radial direction of the head 700. The outer cap 810 can cover the top of the second flame generation part 720 where the flame can be generated, and can control the diffusion direction of the flame so that the flame is guided outward in the radial direction of the head 700.

[0351] Figure 38 is Figure 35 exploded top view perspective view of. Figure 39 is Figure 35 exploded bottom view perspective view of. The head 700 can include a flame generation part. In the flame generation part, when the fuel gas is discharged to the outside of the burner, the fuel gas is ignited by a spark plug (not shown), thereby generating a flame.

[0352] The head 700 can include a first flame generation part 710 and a second flame generation part 720 where the flame can be generated. The first flame generation part 710 can be disposed in the central region of the head 700, and a plurality of first flame holes 711 can be defined in the first flame generation part 710 and can be arranged along its periphery.

[0353] The second flame generation part 720 can be disposed in the outer region of the head 700 and can be arranged to surround the first flame generation part 710. A plurality of second flame holes 721 can be defined in the second flame generation part 720 and can be arranged along its periphery. Thus, when the flame can be generated in the burner, the inner annular flame and the outer annular flame can be generated in a dual manner.

[0354] The fuel gas flowing inside the burner can be discharged through the first flame holes 711 and the second flame holes 721. When the fuel gas is ignited, a flame can be generated at the outlet of each of the first flame holes 711 and the second flame holes 721, so that the flame can be maintained while the fuel gas is being discharged.

[0355] The first flame generation part 710 and the second flame generation part 720 can be separate components and can be spaced apart from each other. Therefore, fuel gas needs to be separately supplied to each of the first flame generation part 710 and the second flame generation part 720. In an embodiment, one mixing pipe 501 can be used, and the fuel gas flowing from one pipe to the mixing pipe can flow through the single mixing pipe 501.

[0356] Therefore, the fuel gas discharged from one mixing pipe 501 should flow into the first flame generation part 710 and the second flame generation part 720 that are spaced apart from each other. For this purpose, inside the burner, a flow channel needs to be formed to distribute the fuel gas discharged from the mixing pipe 501 to each of the first flame generation part 710 in the central region and the second flame generation part 720 in the outer region.

[0357] In the burner according to an embodiment of the present disclosure, the fuel gas discharged from the mixing pipe 501 can flow through the cover 600, and can flow to the central region of the cover 600, and can be divided into multiple parts. Then, one part of it can flow into the first flame generation part 710, and the remaining part can flow to the outer region of the cover 600, and can flow into the second flame generation part 720.

[0358] In other words, the fuel gas discharged from the mixing pipe 501 can flow through the cover 600, and reach the outer region of the upper surface of the cover 600. Then, the fuel gas can flow from the outer region of the cover 600 to the central region of the cover 600, and can be divided into multiple parts. One part of it can flow through the head 700 from the central region of the cover 600, and can reach the upper surface of the head 700, and can flow into the first flame generation part 710 in the central region of the head 700.

[0359] Another part of this part can flow from the central region of the space on the upper surface of the cover 600 to the outer region, and can flow through the head 700, and can reach the upper surface of the head 700, and can flow into the second flame generation part 720 in the outer region of the head 700.

[0360] Due to this structure, the fuel gas flowing into one common mixing pipe 501 can be divided into two parts inside the burner when flowing through the flow channel formed in the burner, and then the two parts can respectively flow into the first flame generation part 710 and the second flame generation part 720.

[0361] Therefore, compared with a structure in which an external source is connected to a plurality of pipes and a plurality of gas flow paths respectively connected to the plurality of pipes and a flame generation part are provided independently of each other, the overall structure of the burner according to an embodiment of the present disclosure can be simplified. In addition, the burner according to an embodiment of the present disclosure can be connected to an external source through a single pipe. Such a simple structure allows for smooth flow of gas inside the burner, improves burner performance, and saves the manufacturing cost of the burner.

[0362] Figure 40 is a side cross-sectional view of the burner. In the drawings described below, solid arrows are used to indicate the flow of gas. In addition, in Figure 40 dashed arrows are used to indicate the flow of air flowing into the burner from the surrounding environment.

[0363] The main body 500 may include an injection part 530 and an air receiving part 540. The injection part 530 may be formed on one side of the main body 500, and a gas injection hole 531 may be defined in the injection part 530. The gas injection hole 531 may be formed to extend through the injection part 530 and may have an inlet connected to a pipe connected to an external source that supplies gas.

[0364] The injection part 530, the air receiving part 540, and the mixing pipe 501 may be arranged in a straight line. Due to this structure, the gas that has flowed through the injection part 530 can smoothly flow through the air receiving part 540 and the mixing pipe 501.

[0365] The gas injection hole 531 may be formed in the injection part 530 so as to extend through the injection part 530.

[0366] The air receiving part 540 may be provided between the inlet of the mixing pipe 501 and the outlet of the injection part 530. A space into which gas is introduced and stored may be formed in the air receiving part 540. In one example, the air guide 701 may protrude downward from the head 700 and may cover the space of the air receiving part 540. The air guide 701 may be formed in a substantially "U" shape so as to be combined with the air receiving part 540 to form a space for air to flow into.

[0367] The air guide 701 may cover the space of the air receiving part 540, but may be coupled to the air receiving part 540 to form a hole through which the surrounding air flows into the rear side of the burner. Through this hole, the air around the burner can flow into the space of the air receiving part 540.

[0368] The inlet of the fuel injection hole 531 can be relatively wide, and its outlet can be relatively narrow. For example, the outlet of the fuel injection hole 531 can be provided with an orifice so that the fuel flowing into the main body 500 through the fuel injection hole 531 can be ejected from the outlet of the fuel injection hole 531 at a very high speed.

[0369] The fuel ejected from the outlet of the fuel injection hole 531 can flow into the mixing tube 501 without dispersion due to its very high flow rate. At this time, the fuel can encounter the air flowing into the air receiving portion 540 when flowing through the air receiving portion 540, and at the same time, the air can flow into the mixing tube 501.

[0370] When the fuel flows through the mixing tube 501, the fuel can be mixed with the air that has been introduced into the air receiving portion 540, and then, the mixture of the fuel and the air can be discharged from the mixing tube 501. In this way, the fuel can be mixed with the air in the mixing tube 501 and can be mixed with the oxygen in the air. Therefore, when the mixture is ignited by the spark plug, the mixture can burn.

[0371] For example, the mixing tube 501 can be embodied as a Venturi tube. The Venturi tube can be formed such that the cross-sectional area of each of its inlet and outlet is relatively large, and the cross-sectional area of its central region is relatively narrow.

[0372] Therefore, in the neck region with a relatively narrow cross-sectional area in the central region of the mixing tube 501, the fuel flow rate is the fastest in the mixing tube 501, so that the pressure can be reduced in the central region.

[0373] The mixing tube 501 can be embodied as a Venturi tube. Therefore, the pressure in the neck region is lower than the pressure in the region adjacent thereto. Therefore, due to the pressure difference, the air having a relatively high pressure in the space of the air receiving portion 540 can smoothly flow into the mixing tube 501, and thus can be mixed with the fuel in the mixing tube.

[0374] Figure 41 is a perspective view showing the main body 500 and the cover 600 of the burner. Figure 42 is Figure 41 exploded view of. Figure 43 is Figure 41 top view of. Figure 44 is Figure 41 bottom view of. Figure 45 is a perspective view of the main body 500. Figure 46 is Figure 45 top view of.

[0375] The main body 500 may include a lower unit 510 and a first conduit 520. The lower unit 510 may be recessed into the main body 500 from the upper surface of the main body 500 and may form the lower part of the mixing tube 501. The lower unit 510 may form approximately half of the mixing tube 501.

[0376] However, since at least a part of the upper unit 620 formed on the cover 600 is received in the recessed space of the lower unit 510, the recessed space of the lower unit 510 that forms the mixing tube 501 may be deeper than half the depth of the mixing tube 501.

[0377] The first conduit 520 may be connected to the outlet of the mixing tube 501 and may have two parts that are connected to the outlet of the mixing tube 501 and extend along the circumferential direction of the main body 500 and in opposite directions respectively. A part of the first conduit 520 may be closed by the cover 600, and gas may flow in the first conduit 520. The top of the first conduit 520 may be closed by the cover 600 to form a gas flow path.

[0378] The first conduit 520 may be embodied as a space connected to the outlet of the mixing tube 501 and may change the flow direction of the gas discharged from the mixing tube 501 to an upward direction. The gas discharged from the mixing tube 501 may flow upward along the first conduit 520 and may flow into the space on the upper surface of the cover 600.

[0379] The main body 500 may include a cover receiving groove 550, a first spark plug receiving hole 560, and an extension panel 570. The cover receiving groove 550 may be recessed into the main body from the upper surface of the main body 500 and may have a shape corresponding to the shape of the cover 600 such that the cover 600 is received therein.

[0380] Holes for fastening a fastening device such as a bolt may be formed in the bottom surface defining the cover receiving groove 550, and corresponding holes may be formed in the cover 600 such that the cover 600 can be coupled to the main body 500 using the fastening device. Since the cover 600 is disposed in the cover receiving groove 550, the cover 600 can be precisely positioned at a designated position of the main body 500.

[0381] The first spark plug receiving hole 560 may be formed at a position overlapping the cover 600, and a spark plug may be inserted and installed in the first spark plug receiving hole 560. In one example, the cover 600 may have a second spark plug receiving hole 650 defined therein, and the spark plug is inserted into the second spark plug receiving hole at a position corresponding to the first spark plug receiving hole 560.

[0382] In the illustrated embodiment, the first spark plug receiving hole 560 may be provided adjacent to the first flame generation part 710 provided in the central region of the burner. In this structure, the first flame generation part 710 may be ignited first, and the second flame generation part 720 may be ignited later.

[0383] In another embodiment, the first spark plug receiving hole 560 may be provided adjacent to the second flame generation part 720 provided in the outer region of the burner. In this structure, the second flame generation part 720 may be ignited first, and the first flame generation part 710 may be ignited later.

[0384] The extension panel 570 may surround the cover receiving groove 550 and extend in the circumferential direction of the main body 500. The extension panel 570 may generally be provided in a disk shape. A hole into which a fastening device is inserted may be formed in the extension panel 570.

[0385] Therefore, by using a fastening device to connect the extension panel 570 to the stove of a gas stove or a combination cooking appliance, the burner can be installed on the gas stove or the hybrid cooking appliance.

[0386] Figure 47 is a perspective view of the cover 600. Figure 48 is Figure 47 the bottom view of Figure 49 is Figure 47 the top view of. The cover 600 may have a planar area smaller than that of the main body 500. As described above, the cover 600 may be placed in the cover receiving groove 550 of the main body 500 and may be connected to the cover 600 using a fastening device.

[0387] The cover 600 may include a through hole 610 formed at a position overlapping at least a part of the first conduit 520. Gas may flow through the through hole 610. The through hole 610 through which the supply gas may flow may be formed in the cover 600 at least at a portion overlapping the inclined guide surface 121. The gas may flow upward along the first conduit 520, pass through the through hole 610 and flow through the cover 600, and may flow into the space on the upper surface of the cover 600.

[0388] In addition, the cover 600 may include an upper unit 620 constituting the mixing tube 501. The upper unit 620 may be formed to project downward toward the main body 500 and may have an internal space defined therein so as to be recessed upward from its lower surface into the upper unit 620. The internal space may constitute the upper part of the mixing tube 501.

[0389] The upper unit 620 may constitute approximately half of the mixing tube 501. However, the upper unit 620 may be inserted into a groove defined in the lower unit 510 of the main body 500 to define the mixing tube 501.

[0390] In the illustrated embodiment, the upper unit 620 may be integrally formed with the cover 600. However, in another embodiment, the upper unit 620 may be formed as a structure separate from the cover 600. Additionally, in yet another embodiment, the upper unit 620 may be integrally formed with the lower unit 510.

[0391] In one example, the burner may include a second conduit 630. The second conduit 630 may be formed by joining the cover 600 and the head 700 to each other, and may provide a space in which the fuel gas flowing from the main body 500 to this space can flow from the outer region of the head 700 to its central region.

[0392] The fuel gas discharged from the first conduit 520 may flow through the second conduit 630 to the central region of the head 700, and may be divided into portions that can be respectively supplied to the first flame generation part 710 and the second flame generation part 720.

[0393] One fuel gas injection hole 531 and one mixing tube 501 equipped with orifices may be used to divide the fuel gas into multiple portions such that these portions of the fuel gas can be respectively supplied to the first flame generation part 710 and the second flame generation part 720 that are spaced apart from each other.

[0394] The cover 600 may include a through - hole 610 and a lower part 640. In addition to the above description, the through - hole 610 may be connected to the first conduit 520 and allow the fuel gas to flow through the first conduit 520. The fuel gas may flow through the through - hole 610, and then, a part of it may flow into the second conduit 630, while the remaining part may flow into the second flame generation part 720.

[0395] The through - hole 610 may include a pair of through - holes that are spaced apart from each other in the circumferential direction and extend in the circumferential direction and in the outer region of the cover 600. The through - hole 610 may be provided on the top of the first conduit 520, and the flow direction of the fuel gas in the first conduit 520 may change rapidly in the through - hole 610.

[0396] Therefore, in order to allow the smooth flow of the fuel gas between the mixing tube 501 and the second conduit 630, the first conduit 520 may be formed as a relatively large space, so that the area size of the through - hole 610 can be increased.

[0397] If a single through-hole 610 having a large area size is formed, the rigidity of the cover 600 may be weakened. Thus, according to an embodiment, the through-hole 610 may include a pair of through-holes spaced apart from each other in the circumferential direction, and a bridging portion may be provided between the through-holes 610 to enhance the rigidity of the cover 600.

[0398] In addition, fastening holes may be defined in the bridging portion between the through-holes 610 such that fastening means may be inserted and fastened into the fastening holes. Thus, various holes may be effectively arranged in the entire area of the cover 600. The fastening means inserted and fastened into the fastening holes may be used to strengthen the connection between the cover 600 and the main body 500.

[0399] The lower portion 640 may be formed such that a part thereof surrounds the through-hole 610, may project upward from the upper surface of the cover 600, and may constitute the lower part of the second conduit 630. The lower portion 640 and the upper portion 740 formed on the head 700 may be joined to each other to define the second conduit 630.

[0400] The lower portion 640 may include a first flow channel defining portion 641, a first central portion 642, a first outer portion 643, and a first connecting portion 644. The first flow channel defining portion 641 may surround the through-hole 610 and may define a flow channel extending from the through-hole 610 to the central region of the cover 600.

[0401] The combustible gas that has flowed through the through-hole 610 and has flowed into the space on the upper surface of the cover may flow from the outer region of the cover 600 to its central region along the first flow channel defining portion 641.

[0402] The first central portion 642 may be formed in the central region of the cover 600, may be connected to the first flow channel defining portion 641, and may define a flow channel connected to the first flame generating portion 710. In the first central portion 642, the combustible gas may be divided into a plurality of parts such that one part may flow to the first flame generating portion 710 while the remaining parts may flow to the second flame generating portion 720.

[0403] The part of the combustible gas flowing into the first central portion 642 may flow upward and flow into the first flame generating portion 710, while the other part thereof may flow back to the outer region of the cover 600 along the first connecting portion 644 and may reach the first outer portion 643.

[0404] The first exterior 643 can be disposed in the exterior region of the cover 600, can define a flow passage connected to the second flame generating portion 720, and can include a pair of first exteriors spaced apart from each other in the circumferential direction. The fuel gas flowing into the first exterior 643 can flow upward, can flow through the diffusion holes 730 of the head 700, and flow to the space on the upper surface of the head, and can reach the second flame generating portion 720.

[0405] The first connection portion 644 can define a flow passage connecting the internal spaces of the first exterior 643 and the first central portion 642 to each other. Since the first exterior 643 includes a pair of first exteriors, the first connection portion 644 can include a pair of first connection portions respectively connected to the pair of first exteriors 643.

[0406] The fuel gas flowing into the first flow passage defining portion 641 can flow through the first central portion 642 and the first connection portion 644, and can flow upward in the first exterior 643. In order to allow the fuel gas to flow smoothly, the bottom surfaces of the first flow passage defining portion 641, the first central portion 642, and the first connection portion 644 can form a continuous plane.

[0407] In one example, a pair of first exteriors 643 can be formed and arranged symmetrically with respect to the center of the cover 600. The pair of first connection portions 644 can be formed and arranged symmetrically with respect to the center of the cover 600.

[0408] The first exterior 643 can be formed at a position overlapping the side portion 780 of the head 700 in the vertical direction. Due to this structure, the fuel gas that has reached the first exterior 643 can smoothly flow to the side portion 780 and then reach the second flame generating portion.

[0409] The lower portion can include a lower partition wall protruding upward from the upper surface of the cover 600, and the lower partition wall can surround the through hole 610. The fuel gas that has flowed through the through hole 610 can be guided along the lower partition wall so as to flow to the first flow passage defining portion 641 and the first central portion 642.

[0410] The lower partition wall can form the walls of the first flow passage defining portion 641, the first central portion 642, the first exterior 643, and the first connection portion 644. That is, the first flow passage defining portion 641, the first central portion 642, the first exterior 643, and the first connection portion 644 can be formed by the lower partition wall protruding upward from the upper surface of the cover 600.

[0411] In one example, the cover 600 may include a second spark plug receiving hole 650 into which a spark plug is inserted and mounted. The second spark plug receiving hole 650 may be positioned at a location corresponding to the first spark plug receiving hole 560 of the main body 500. Accordingly, depending on the position of the first spark plug receiving hole 560, the second spark plug receiving hole 650 may be provided adjacent to the first flame generating portion 710 or adjacent to the second flame generating portion 720.

[0412] Figure 50 is a perspective view showing the cover 600 and the head 700. Figure 51 is Figure 50 an exploded top perspective view of. Figure 52 is Figure 50 a bottom perspective view of. Figure 53 is Figure 50 a top view of.

[0413] Due to the use of the burner, foreign matter may remain on the head 700. Therefore, for hygienic purposes, cleaning of the head 700 is necessary. To clean the head 700, the head 700 may be easily removable from the burner.

[0414] Accordingly, for example, a fastening device is required to couple the head 700 and the cover 600 or the main body 500 such that a user can easily remove the head 700 from the burner using the fastening device when needed.

[0415] A structure is required to guide the position of the head 700 such that the head 700 can be set at the correct position on the cover 600. For this guide, an insertion protrusion 772 may be formed on the head 700, and a protrusion receiving groove 660 may be formed in the cover 600.

[0416] When the insertion protrusion 772 of the head 700 is inserted into the protrusion receiving groove 660 of the cover 600, the head 700 can be set at the correct position on the cover 600. The insertion protrusion 772 and the protrusion receiving groove 660 will be additionally described below. Hereinafter, the head 700 will be described in detail.

[0417] Figure 54 is a perspective view of the head 700. Figure 55 is Figure 54 a bottom view of. Figure 56 is Figure 54 a top view of. Figure 57 is Figure 54 views in different directions.

[0418] The head 700 may include diffusion holes 730 and an upper part 740. The diffusion holes 730 may be connected to the second conduit 630 and may allow combustion gas to flow therethrough. The combustion gas flowing into the diffusion holes 730 may flow into the second flame generation part 720 and burn therein.

[0419] The diffusion holes 730 may include a pair of diffusion holes provided in an outer region of the head 700 and spaced apart from each other in the circumferential direction of the head. In a plan view, the diffusion holes 730 may be spaced apart from the through holes 610 in the circumferential direction of the head.

[0420] Accordingly, a portion of the combustion gas that has flowed through the through holes 610 may flow along the second conduit 630 toward the central region of the head 700. Another portion of the combustion gas may flow back to the outer region of the head 700, may flow through the diffusion holes 730, and may diffuse in the circumferential direction in a space on the upper surface of the head 700, and then may flow into the second flame generation part 720.

[0421] The upper part 740 may be formed such that a part thereof surrounds the diffusion holes 730, may protrude downward from the lower surface of the head 700, and may be coupled to the lower part 640 to define an upper portion of the second conduit 630. The lower part 640 of the cover 600 and the upper part 740 of the head 700 may be coupled to each other to define the second conduit 630.

[0422] The upper part 740 may include a second flow channel defining part 741, a second central part 742, a second outer part 743, and a second connection part 744. The second flow channel defining part 741 may cover the through holes 610 and may define a flow channel extending from the through holes 610 to the central region of the head 700.

[0423] The combustion gas that has flowed through the through holes 610 and has flowed into the second flow channel defining part 741 may flow along the second flow channel defining part 741 from the outer region of the head 700 toward its central region.

[0424] The second central part 742 may be formed in the central region of the head 700, may be connected to the second flow channel defining part 741, and may define a flow channel connected to the first flame generation part 710. In the second central part 742, the combustion gas may be divided into multiple parts such that one part may flow toward the first flame generation part 710 while the remaining part may flow toward the second flame generation part 720.

[0425] The portion of the combustion gas flowing into the second central part 742 may flow upward and may flow into the first flame generation part 710. Another part thereof may flow back to the outer region of the head 700 along the second connection part 744 and may reach the second outer part 743.

[0426] The second outer part 743 can surround the diffusion hole 730, can be disposed in the outer region of the head 700, and can define a flow channel connected to the second flame generation part 720. The second outer part 743 can include a pair of second outer parts spaced apart from each other in the circumferential direction. The combustible gas flowing into the second outer part 743 can flow upward, can flow through the diffusion hole 730 of the head 700, can flow along the space on the upper surface of the head 700, and can reach the second flame generation part 720.

[0427] The second connection part 744 can define a flow channel connecting the inner space of the second outer part 743 and the inner space of the second central part 742. Since the second outer part 743 includes a pair of second outer parts, the second connection part 744 can include a pair of second connection parts respectively connected to the pair of second outer parts 743.

[0428] An opening can be formed in the side surface of the second central part 742, and the opening can be connected to the second outer part 743 through the second connection part 744.

[0429] In one example, a pair of second outer parts 743 can be symmetrically arranged around the center of the head 700. A pair of second connection parts 744 can be symmetrically arranged around the center of the head 700.

[0430] The upper part 740 can include an upper partition wall protruding downward from the lower surface of the head 700, and the upper partition wall can surround a through hole 610 formed in the outer region of the cover 600. The combustible gas flowing through the through hole 610 can be guided along the upper partition wall so as to flow toward the second connection part 744 and the second central part 742.

[0431] The upper partition wall can constitute the wall of the second flow channel defining part 741, the second central part 742, the second outer part 743, and the second connection part 744. That is to say, the second flow channel defining part 741, the second central part 742, the second outer part 743, and the second connection part 744 can be constituted by the upper partition wall protruding downward from the lower surface of the head 700.

[0432] In order to prevent the combustible gas flowing into the second conduit 630 from leaking through the gap between the upper part 740 and the lower part 640, the contact surfaces of the partition walls that are in contact with each other and respectively constitute the upper part 740 and the lower part 640 can have the same shape.

[0433] The fuel gas that has flowed through the through-hole 610 can pass through the second conduit 630 and flow from the outer region of the head 700 to the central region of the head 700, and can be divided into multiple parts in the central region of the head 700. One part of the multiple parts into which the fuel gas has been divided in the central region of the head 700 can reach the first flame generation part 710, and can be ejected through the first flame hole 711 and can burn.

[0434] Another part of the multiple parts into which the fuel gas has been divided in the central region of the head 700 can pass through the second conduit 630 and flow from the central region of the head 700 to the outer region of the head 700, and can flow through the diffusion hole 730, and then can reach the second flame generation part 720, and can be ejected through the second flame hole 721 and can burn.

[0435] The second conduit 630 can include a first space defined by combining a first flow channel defining portion 641 and a second flow channel defining portion 741 with each other, a second space defined by combining a first central portion 642 and a second central portion 742 with each other, a third space defined by combining a first connection portion 644 and a second connection portion 744 with each other, and a fourth space formed by combining a first outer portion 643 and a second outer portion 743 with each other.

[0436] The fuel gas can flow into the first space in the outer region of the second conduit 630, and can flow from the first space into the second space and reach the central region of the head 700. The fuel gas can be divided into multiple parts in the second space. One part of the multiple parts can flow directly upward from the second space, and can flow upward through the central hole provided in the upper part of the central region of the head 700, and can reach the first flame generation part 710 connected to the central hole.

[0437] Another part of the multiple parts of the fuel gas can flow through the third space, and flow into the fourth space in the outer region of the head 700, and can flow upward from the fourth space to reach the second flame generation part 720 in the outer region of the head 700.

[0438] In this way, the fuel gas that has flowed through the through-hole 610 can be divided into two parts in the second conduit 630. One part can reach the first flame generation part 710, while the other part can reach the second flame generation part 720.

[0439] The first flame generation part 710 may be disposed in the central region of the head 700 and may protrude upward from the upper surface of the head 700. In addition, the second flame generation part 720 may protrude upward from the upper surface of the head 700 in the outer region of the head 700. Accordingly, the second flame generation part 720 may surround the first flame generation part 710.

[0440] The head 700 may include a gas diffusion part 750 and a flame propagation part 760. The gas diffusion part 750 may be embodied as a space in which the gas flowing through the diffusion holes 730 diffuses and is surrounded by the upper surface of the head 700 and the second flame generation part 720, and may extend along the periphery of the head 700.

[0441] The gas diffusion part 750 may be embodied as a space connected to the second flame generation part 720, may extend in an annular shape with a constant width, and may be positioned inside the second flame generation part 720. Accordingly, the gas that has flowed through the diffusion holes 730 may diffuse along the gas diffusion part 750 and on the upper surface of the head 700, and may uniformly flow into the second flame generation part 720 in the circumferential direction of the second flame generation part 720.

[0442] The inclined diffusion surface 761 may be disposed at a position adjacent to the diffusion holes 730 to facilitate the flow and diffusion of the gas. That is, the inclined diffusion surface 761 may be defined on the upper surface of the head 700 and at the region where the diffusion holes 730 and the gas diffusion part 750 are connected to each other, and may constitute each of two opposite ends of the diffusion holes 730. The inclined diffusion surface 761 may be inclined in the circumferential direction or the radial direction.

[0443] The inclined diffusion surface 761 may be formed on the upper surface of the head 700 to be inclined in the circumferential direction or the radial direction. Due to the inclined diffusion surface 761, the planar area size of the diffusion holes 730 may increase as the diffusion holes 730 extend upward.

[0444] Accordingly, although the gas flowing into the gas diffusion part 750 through the diffusion holes 730 may further flow upward, the gas may be guided along the inclined diffusion surface 761 to smoothly diffuse into the gas diffusion part 750 and then be uniformly distributed throughout the gas diffusion part 750. As a result, the second flame generation part 720 may receive a uniform gas supply in its circumferential direction, thereby generating a uniform flame in its circumferential direction.

[0445] The flame propagation portion 760 may occupy a partial area of the gas diffusion portion 750, such that the gas diffusion portion 750 may be discontinuous at the flame propagation portion 760. The flame propagation portion 760 may be embodied as a space in which a flame propagates between the first flame generation portion 710 and the second flame generation portion 720. A flame may be generated in the flame propagation portion 760, and the flame may flow from the first flame generation portion 710 to the second flame generation portion 720, or through the flame propagation portion 760 from the second flame generation portion 720 to the first flame generation portion 710.

[0446] Accordingly, the flame generated in the first flame generation portion 710 may flow to the second flame generation portion 720, or conversely, the flame generated in the second flame generation portion 720 may flow to the first flame generation portion 710. Thus, while gas is supplied to the first flame generation portion 710 and the second flame generation portion 720, a flame may always exist in the first flame generation portion 710 and the second flame generation portion 720.

[0447] When a flame is not ignited or is extinguished in one flame generation portion, the flame of the other flame generation portion may flow through the propagation portion, thereby generating a flame in the flame generation portion where there is no flame.

[0448] The head 700 may include a diffusion portion defining protrusion 762 and a propagation portion defining protrusion 763. The diffusion portion defining protrusion 762 may be disposed between the first flame generation portion 710 and the second flame generation portion 720, project upward from the upper surface of the head 700, extend in the circumferential direction of the head 700, and surround the gas diffusion portion 750.

[0449] The gas diffusion portion 750 may be embodied as a space surrounded by the second flame generation portion 720, the upper surface of the head 700, the diffusion portion defining protrusion 762, and the outer cap 810.

[0450] The propagation portion defining protrusion 763 may project upward from the upper surface of the head 700, and may include a pair of propagation portion defining protrusions respectively disposed on two opposite sides of the flame propagation portion 760 to define the flame propagation portion 760. The propagation portion defining protrusion 763 may isolate the gas diffusion portion 750 and the flame propagation portion 760 from each other.

[0451] The propagation portion defining protrusion 763 may have a through hole extending therethrough, such that the gas in the gas diffusion portion 750 is discharged to the flame propagation portion 760 through the through hole. A flame may be generated at the outlet of the through hole, and then, the flame may propagate from the first flame generation portion 710 to the second flame generation portion 720 through the flame propagation portion 760, and vice versa.

[0452] Figure 58 is Figure 57 an enlarged view of part 58 of Figure 58 and shows a part of the first flame generation section 710. Figure 59 is Figure 57 an enlarged view of part 59 of Figure 59 and shows a part of the second flame generation section 720.

[0453] The flame generation section may include flame holes through which fuel gas is ejected. A flame may be generated at the outlet of the flame holes. The first flame generation section 710 may include first flame holes 711, and the second flame generation section 720 may include second flame holes 721.

[0454] The first flame holes 711 or the second flame holes 721 may be recessed into the upper ends of the first flame generation section 710 or the second flame generation section 720. The first flame holes 711 may be covered with an inner cap 820, and the second flame holes 721 may be covered with an outer cap 810 so that the tops of each of the first flame holes and the second flame holes can be blocked.

[0455] The recessed depths of adjacent flame holes in the first flame generation section 710 or the second flame generation section 720 may be different from each other. For example, the first flame generation section 710 may have deep first flame holes 711a and shallow first flame holes 711b that are alternately arranged along the perimeter. Deep second flame holes 721a and shallow second flame holes 721b may be alternately arranged along the perimeter of the second flame generation section 720.

[0456] The recessed depth of the flame holes may be proportional to the amount of fuel gas discharged to the outside through the flame holes. In addition, the size and length of the flame may be proportional to the amount of fuel gas discharged through the flame holes.

[0457] Therefore, the deeper the recessed depth of the flame holes, the larger the size of the flame generated at the outlet of the flame holes. As the size of the flame increases, the possibility of adjacent flames merging with each other increases.

[0458] When the size of the flame becomes larger due to merging, the fuel gas inside the flame may not contact air, which may cause incomplete combustion of the fuel gas. Therefore, it is necessary to prevent the merging to prevent incomplete combustion.

[0459] In an embodiment, relatively deep flame holes may be provided between relatively shallow flame holes. Due to this structure, the spacing between large flames that are highly likely to merge with each other can be increased, and relatively small flames can be placed between them, so that the merging between adjacent flames can be effectively prevented.

[0460] In addition, when the flame generating portion is formed to have relatively shallow flame holes, the amount of combustion gas discharged from the flame generating portion is small, such that the burner cannot generate sufficient firepower. In an embodiment, a plurality of relatively deep flame holes may be arranged such that the combustion gas can be sufficiently discharged to the outside through the flame holes.

[0461] Figure 60 is a perspective view showing a state in which the outer cap 810 and the inner cap 820 are mounted on the head 700. Figure 61 is Figure 60 a sectional view of Figure 62 is Figure 61 an enlarged view of part 62 of Figure 63 is a perspective view showing the inner cap 820. Figure 64 is a view for showing the flow of combustion gas in a burner according to an embodiment.

[0462] The burner may include an outer cap 810 and an inner cap 820 covering the flame generating portion. The outer cap 810 may be disposed on the upper end of each of the second flame generating portion 720 and the diffusion portion defining protrusion 762, and may cover the combustion gas diffusion portion 750. The outer cap 810 may be disposed on the head 700 and cover the upper end of the combustion gas diffusion portion 750.

[0463] Referring to Figure 61 , the outer cap 810 may have an inclined sectional shape. For example, the outer cap 810 may be formed such that its sectional shape gradually slopes upward as the outer cap extends outward in the radial direction.

[0464] The head 700 may include a core portion 770, a side portion 780, a first support 791, and a second support 792. The core portion 770 may be disposed in the central region of the head 700, and the first flame generating portion 710 may be formed at the upper end of the core portion. The inner cap 820 may be disposed on the upper end of the core portion 770.

[0465] The side portion 780 occupies the outer region of the head 700, and the combustion gas diffusion portion 750 may be defined in the side portion 780. The core portion 770 and the side portion 780 may be arranged to be spaced apart from each other, and may be connected to each other via the first support 791 and the second support 792 and a pair of second connection portions 744.

[0466] The first support 791 may connect the core portion 770 and the side portion 780 to each other, and may meet the inner end of the flame propagation portion 760. The second support 792 may connect the core portion 770 and the side portion 780 to each other, and may be opposite to the first support 791 around the core portion 770.

[0467] A pair of second connecting portions 744, a first support member 791, and a second support member 792 can connect the core portion 770 and the side portion 780 to each other and can be spaced apart from each other in the circumferential direction. A space can be defined between each of the pair of second connecting portions 744 and each of the first support member 791 and the second support member 792.

[0468] The first flame generating portion 710 can be formed to protrude from an outer region of the core portion 770. In the core portion 770 and in a region inside the first flame generating portion 710, a space can be defined in which portions of the fuel gas flowing into the core portion 770 through the second conduit 630 converge with each other.

[0469] The core portion 770 can include a plurality of guiding protrusions 771 that protrude upward and are spaced apart from each other in the circumferential direction and guide the installation position of the inner cap 820. Each of the plurality of guiding protrusions 771 can be provided between adjacent first flame holes among the plurality of first flame holes 711. The inner cap 820 can include a guiding ring 821 that protrudes downward and is formed to surround and contact the guiding protrusions 771.

[0470] In order to stably set the inner cap 820 on the upper end of the core portion 770, the guiding protrusions 771 can be formed on the core portion 770, and the guiding ring 821 can be formed on the inner cap 820.

[0471] The guiding protrusions 771 can include a plurality of guiding protrusions spaced apart from each other in the circumferential direction. When the inner cap 820 is placed on the core portion 770, the guiding protrusions 771 can be located inside the guiding ring 821 so as to contact the guiding ring. The position of the inner cap 820 can be guided along the guiding protrusions 771, and thus can not be laterally deviated from the core portion 770.

[0472] Due to this structure, the inner cap 820 can be stably set at the designed position on the upper end of the core portion 770 and can maintain its position.

[0473] The core portion 770 can include a supporter 773 that contacts the lower surface of the inner cap 820 and supports the inner cap 820. The supporter 773 can be formed to gradually incline upward as the support member extends toward the inside of the core portion 770. The inner cap 820 can be provided on the upper surface of the supporter 773.

[0474] The supporter 773 can be provided inside the guiding protrusions 771. The upper surface of the supporter 773 can extend along a substantially straight line, while the lower surface of the supporter can be substantially curved.

[0475] The fuel gas discharged from the flame holes of the first flame generation part 710 or the second flame generation part 720 can be mixed with the secondary air around the flame generation part to improve the combustion efficiency. Since the second flame generation part 720 is provided in the outer region of the burner, the fuel gas discharged from the second flame holes 721 can actively contact the surrounding secondary air.

[0476] However, since the first flame generation part 710 can be provided on the core part 770 arranged in the central region of the burner, the contact area with the surrounding air can be reduced due to the outer cap 810 and other structures.

[0477] In view of this problem, according to an embodiment, the vertical height of the first flame generation part 710 can be higher than the vertical height of the diffusion part defining protrusion 762. Due to this structure, the vertical height of the first flame generation part 710 can be higher than the vertical height of the outer cap 810. Therefore, the contact area between the first flame generation part 710 and the surrounding air can be increased.

[0478] Therefore, the first flame generation part 710 smoothly contacts the surrounding air, so that the fuel gas discharged from the first flame generation part 710 smoothly receives the surrounding secondary air, thereby preventing incomplete combustion caused by insufficient supply of secondary air.

[0479] The core part 770 can include an insertion protrusion 772 that protrudes downward and is inserted into a groove defined in the cover 600. The cover 600 can include a protrusion receiving groove 660 that is recessed from the upper surface of the cover into the cover and is formed in a region corresponding to the insertion protrusion 772. The insertion protrusion 772 can be inserted into the protrusion receiving groove 660. The insertion protrusion 772 can include at least one insertion protrusion 772. The protrusion receiving groove 660 can include at least one protrusion receiving groove 660.

[0480] In order to facilitate the attachment of the head 700 to the cover 600 and the detachment from the cover 600, while the head and the cover are coupled to each other at the designed position, a structure is needed to guide its position. Therefore, the core part 770 can be provided with the insertion protrusion 772, and the cover 600 can be provided with the protrusion receiving groove 660.

[0481] Due to this structure, the head 700 can be stably set at the designed position on the upper end of the cover 600 and can maintain its position.

[0482] Figure 30It is a diagram for showing the flow of fuel gas in a burner according to an embodiment. In the embodiment, the fuel gas discharged from a mixing pipe 501 may flow into a first conduit 520 and a second conduit 630. In the first conduit 520, the fuel gas may be divided into two parts flowing in opposite directions and in a circumferential direction. Then, the two parts may flow through a cover. Then, a part of each of the two parts may flow toward a second flame generating part 720 provided in an outer region of the burner, and the remaining part thereof may flow toward a first flame generating part 710 provided in a central region of the burner.

[0483] Specifically, when the fuel gas flows through the mixing pipe 501, the fuel gas may be mixed with primary air. Then, the mixture of the fuel gas and air may be discharged from the mixing pipe 501 and then flow into the first conduit 520. The fuel gas flowing into the first conduit 520 may flow through a through-hole 610 and into the second conduit 630. The fuel gas flowing into the second conduit 630 may flow toward a central region of a head 700 and may be divided into a plurality of parts in the central region of the head 700.

[0484] One part of the plurality of parts of the fuel gas in the central region of the head 700 may immediately flow upward, may flow into the first flame generating part 710, may be discharged through a first flame hole 711, and may burn to generate a flame.

[0485] Another part of the plurality of parts of the fuel gas in the central region of the head 700 may flow through a space defined by a first connection part 644 and a second connection part 744 toward an outer region of the head 700, may flow upward and through a diffusion hole 730. Then, the fuel gas may diffuse along a fuel gas diffusion part 750, may flow into the second flame generating part 720, may flow uniformly along a periphery of the second flame generating part 720 provided in the outer region of the head 700, may be discharged through a second flame hole 721, and may burn to generate a flame.

[0486] In the embodiment, the fuel gas discharged from a single mixing pipe 501 may be divided into a plurality of parts, and these parts may be respectively supplied to a plurality of flame generating parts radially spaced apart from each other in the burner. Due to this structure, the flow channels for supplying the fuel gas to the flame generating parts may be integrated with each other. The fuel gas may be supplied to the burner using a single supply pipe, and the flow channel structure in the burner may be simplified.

[0487] Although the present disclosure has been described with reference to the accompanying drawings, the present disclosure is not limited to the embodiments and drawings disclosed herein, and it is obvious that those skilled in the art can make various modifications within the scope of the technical idea of the present disclosure. In addition, although the effects based on the configuration of the present disclosure are not explicitly described and shown in the above description of the embodiments of the present disclosure, it is obvious that the predictable effects of the corresponding configuration should also be recognized.

Claims

1. A burner, comprising: main body; a cover disposed on a top of the body and coupled to the body to define a mixing tube in which gas and air flow and mix with each other; as well as a head disposed on top of the cover and configured to generate a flame, Wherein, the header includes: a first flame generating portion disposed in a central region of the head portion and having a plurality of first flame holes defined therein and arranged along a periphery of the first flame generating portion; and a second flame generating portion disposed in an outer region of the head portion and surrounding the first flame generating portion, wherein a plurality of second flame holes are defined in the second flame generating portion and arranged along a periphery of the second flame generating portion, Wherein, the body, the cover and the head are configured such that: The gas discharged from the mixing tube is divided into two parts flowing in opposite directions in the outer area of ​​the main body. The two portions of the gas then flow through the cover, and Then, a portion of each of the two parts flows into the second flame generating part, and the remaining portion of each of the two parts flows from the outer area of ​​the head toward the central area of ​​the head and flows into the first flame generating part.

2. The burner according to claim 1, wherein: The subject includes: a lower unit which is recessed from an upper surface of the main body into the main body and constitutes a lower portion of the mixing tube; and a first conduit connected to the outlet of the mixing tube in an outer region of the main body, wherein the first conduit has two separate parts connected to the outlet of the mixing tube and extending in opposite directions in the circumferential direction of the main body, The first conduit is partially closed by the cover, and the gas flows in the first conduit.

3. The burner according to claim 2, wherein: The subject includes: an injection portion constituting one side of the main body and having a gas injection hole defined therein; and An air receiving portion is provided between an inlet of the mixing pipe and an outlet of the injection portion, wherein a space into which the fuel gas is introduced and stored is defined in the air receiving portion.

4. The burner according to claim 3, wherein: The subject includes: a cover receiving groove which is recessed from an upper surface of the main body into the main body and has a shape corresponding to that of the cover so that the cover is seated in the cover receiving groove; a first spark plug receiving hole formed at a position overlapping the cover, wherein a spark plug is inserted and mounted into the first spark plug receiving hole; and An extension panel surrounds the cover receiving groove and extends in a lateral direction of the main body.

5. The burner according to claim 2, wherein: The first conduit has an inclined guide surface formed on each of the distal ends of the two divided portions of the first conduit so as to change the flow direction of the gas so that the gas gradually rises upward, wherein the through hole through which the gas flows is formed in the cover in a region at least partially overlapping with the inclined guide surface.

6. The burner according to claim 2, wherein: The cover includes an upper unit protruding downward toward the body, wherein the upper unit has an inner space recessed upward into the upper unit from a lower surface of the upper unit, wherein the inner space constitutes an upper portion of the mixing tube.

7. The burner according to claim 2, wherein: The burner further includes a second duct defined by a combination of the cover and the head, wherein the second duct has a space, wherein the gas flowing from the body into the space flows from an outer region of the head toward a central region of the head.

8. The burner according to claim 7, wherein: The cover comprises: a through hole connected to the first conduit, wherein the gas flows through the through hole; and A lower portion having a portion surrounding the through hole, wherein the lower portion protrudes upward from an upper surface of the cover and defines a lower portion of the second conduit.

9. The burner according to claim 8, wherein: The through holes include a pair of through holes that are provided in an outer region of the cover and are spaced apart from each other in a circumferential direction of the cover.

10. The burner according to claim 8, wherein The lower part comprises: a first outer portion surrounding the through hole and disposed in an outer region of the cover, wherein the first outer portion defines a flow passage connected to the second flame generating portion, wherein the first outer portion includes a pair of first outer portions spaced apart from each other in a circumferential direction of the cover; a first central portion formed in a central region of the cover and defining a flow passage connected to the first flame generating portion; and A first connection portion defines a flow passage connecting an inner space of the first outer portion and an inner space of the first central portion to each other.

11. The burner according to claim 8, wherein: The cover includes a second spark plug receiving hole defined therein, wherein a spark plug is inserted and mounted into the second spark plug receiving hole.

12. The burner according to claim 8, wherein: The header includes: a diffusion hole connected to the through hole, wherein the gas flows through the diffusion hole; and An upper portion having a portion surrounding the diffusion hole, wherein the upper portion protrudes downward from a lower surface of the head and is coupled to the lower portion to define an upper portion of the second duct.

13. The burner according to claim 12, wherein: The diffusion hole includes a pair of diffusion holes that are provided in an outer region of the head and are respectively provided at positions corresponding to the pair of through holes.

14. The burner according to claim 13, wherein: The upper part comprises: a second outer portion surrounding the diffusion hole and disposed in an outer region of the head portion, wherein the second outer portion defines a flow passage connected to the second flame generating portion and includes a pair of second outer portions spaced apart from each other in a circumferential direction of the head portion; a second central portion formed in a central region of the head portion and defining a flow passage connected to the first flame generating portion; and A second connection portion defines a flow passage connecting an inner space of the second outer portion and an inner space of the second central portion to each other.

15. The burner according to claim 12, wherein: The burner is configured such that: The portion of each of the two portions that has flowed through the through hole of the cover flows through the diffusion hole, reaches the second flame generating portion, and is ejected through the second flame hole and burns; and The remaining portion of each of the two parts flows along the second duct from the outer region of the head toward the central region of the head, reaches the first flame generating portion, and is ejected through the first flame hole and burns.

16. The burner according to claim 12, wherein: The second flame generating portion protrudes upward from the upper surface of the head in an outer region of the head, Wherein, the header includes: a gas diffusion portion through which the gas having flowed through the diffusion hole diffuses, wherein the gas diffusion portion is embodied as a space surrounded by the upper surface of the head and the second flame generating portion, and the gas diffusion portion extends along the periphery of the head; and A flame propagation portion occupies a partial area of ​​the gas diffusion portion, so that the gas diffusion portion is discontinuous at the flame propagation portion, wherein the flame propagation portion is embodied as a space where the flame propagates between the first flame generation portion and the second flame generation portion.

17. The burner according to claim 16, wherein: The upper surface of the head has an inclined diffusion surface, which is provided at a position where the diffusion hole and the gas diffusion portion are connected to each other, wherein the inclined diffusion surface contacts each of two opposite ends of the diffusion hole and is inclined in a circumferential direction or a radial direction of the head.

18. The burner according to claim 16, wherein: The header includes: a diffusion portion defining protrusion disposed between the first flame generating portion and the second flame generating portion and protruding upward from an upper surface of the head portion, wherein the diffusion portion defining protrusion extends in a circumferential direction of the head portion and surrounds the gas diffusion portion; and A propagation portion defining protrusion protrudes upward from the upper surface of the head, wherein the propagation portion defining protrusion includes a pair of propagation portion defining protrusions respectively arranged on two opposite sides of the flame propagation portion so as to define the flame propagation portion between the pair of propagation portion defining protrusions.

19. The burner according to claim 18, further comprising: an outer cap disposed on an upper end of each of the second flame generating portion and the diffusion portion defining protrusion so as to cover the gas diffusion portion; as well as An inner cap is disposed on an upper end of the first flame generating portion.

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