Cooking apparatus

Abstract

The present invention relates to a cooking apparatus. The present invention may comprise: a lower burner head (160) stacked on a burner body (110); and an upper burner head (140) forming a gas channel (GS2) between the lower burner head (160) and the upper burner head (140). The lower burner head (160) may be provided with a mixing tube (167) having a tube outlet (167b) open toward the gas channel (GS2). A guide part (150) may be disposed between the tube outlet (167b) and flame holes (162). The guide part (150) may form a part of the gas channel (GS2). At this time, the guide part (150) may extend in a direction inclined toward the flame holes (162). The guide part (150) extending in the inclined direction may guide mixed gas introduced into the gas channel (GS2) to flow toward the flame holes (162) without flowing backward.

Description

Cooking appliances

[0001] The present invention relates to a cooking appliance.

[0002] Cooking appliances are devices installed in the kitchen to cook food. These appliances can be categorized by the heat source, type, or fuel used. Cooking appliances can be categorized by the way they cook food: open and enclosed, depending on the space in which the food is placed. Enclosed appliances include ovens and microwave ovens, while open appliances include cooktops and griddles.

[0003] A closed-type cooking appliance seals the food container with a door and heats the sealed space to cook the food. An open-type cooking appliance heats the food or its container in an open space to cook the food. Recently, combination cooking appliances have emerged, combining both closed-type and open-type cooking appliances, combining multiple heat sources to cook a variety of foods and multiple portions simultaneously.

[0004] Among open-air cooking appliances, the most widely used is the gas range. Gas ranges cook food using the flame generated when gas is combusted by a burner.

[0005] The most widely used burner in gas range-type cooking appliances is the Bunsen burner, which largely comprises a burner body, a burner head, and a burner head cap. Looking at the operation of the burner, when the gas ejected from the nozzle enters the mixing tube, some of the air required for combustion (referred to as "primary air") is sucked into the mixing tube, where the gas and air are mixed. This mixed gas (a mixture of gas and air) is combusted in multiple flame holes, and new air (referred to as "secondary air") is sucked in around the flame, enabling complete combustion.

[0006] A path is formed within the burner through which a mixed gas flows. The mixed gas flows along this path to the flame hole, where it is combusted, generating a flame. Therefore, for effective combustion, it is crucial to design the path so that the mixed gas flows smoothly to the flame hole.

[0007] However, the mixed gas can easily backflow within the flow path, leaking into gaps between components rather than the flame hole. For example, if the flow path has a sharp bend, some of the mixed gas may not pass through the bend and instead flow back in the opposite direction. This can cause the reversed mixed gas to leak between components and combust in locations other than the flame hole, resulting in a backfire.

[0008] These flashbacks can cause explosive noises and damage components. Furthermore, flashbacks not only reduce the burner's energy efficiency, but also compromise product reliability. Furthermore, gas leaks can increase the risk of fire.

[0009] To address this issue, a separate backfire prevention component could be installed to prevent reverse gas flow. However, this separate component not only increases the number of burner parts and manufacturing costs, but also complicates the already cramped burner interior, potentially reducing the flow rate of the mixed gas and potentially reducing product durability.

[0010] The present invention is intended to solve the problems of the prior art as described above, and the present invention prevents mixed gas from flowing backwards inside a burner.

[0011] The present invention is to guide a gas path inside a burner toward a flame hole without any additional parts.

[0012] The present invention allows a mixed gas to diffuse smoothly toward a salt hole.

[0013] According to a feature of the present invention for achieving the above-mentioned purpose, the present invention includes a lower burner head laminated on a burner body, and an upper burner head forming a gas channel between the lower burner head and the burner body.

[0014] The lower burner head is provided with a mixing tube having a tube outlet open toward the gas channel.

[0015] A guide part is arranged between the above tube outlet and the flame holes of the lower burner head.

[0016] The above guide portion forms a portion of the gas channel. At this time, the guide portion extends in an inclined direction toward the flame holes. The guide portion extending in this inclined direction can guide the mixed gas introduced into the gas channel to flow toward the flame holes without flowing backward.

[0017] The surface of the above guide portion can form an obtuse angle with the surface of the gas channel facing the tube outlet.

[0018] The above guide portion can be extended in a direction that narrows the vertical width of the gas channel toward the above salt holes.

[0019] The edge of the tube outlet may be positioned further from the flame holes than the guide portion based on the radial direction of the lower burner head.

[0020] The above guide portion can be formed continuously along the circumferential direction of the lower burner head.

[0021] The above guide portion may include a guide surface extending in an inclined direction toward the salt holes. A first guide end may be formed at one end of the guide surface. The first guide end may have the highest position in the guide portion. A second guide end may be formed at the other end of the guide surface. The second guide end may have the lowest position in the guide portion.

[0022] Based on the radial direction of the lower burner head, the first guide section may be positioned closer to the flame holes than the tube outlet.

[0023] The above guide surface can form a continuous curved surface or plane between the first guide section and the second guide section.

[0024] Based on the direction in which the tube outlet is opened, the first guide section can be positioned at the upper portion of the tube outlet.

[0025] The gas channel may include a first channel portion connected to the tube outlet, and a second channel portion connected to the first channel portion and formed by the guide portion. In addition, the gas channel may further include a third channel portion connected to the second channel portion and connected to the plurality of flame holes.

[0026] The height of the second channel portion may be higher than the height of the third channel portion based on the direction in which the tube outlet is opened.

[0027] The radial distance of the second channel portion relative to the radial direction of the lower burner head may be less than or equal to the diameter of the tube outlet.

[0028] Based on the direction in which the tube outlet is opened, the edge of the tube outlet can be formed between the upper ends of the plurality of salt holes and the lower end of the guide portion.

[0029] One end of the gas channel may be connected to the tube outlet in a first direction. The other end of the gas channel may be connected in a second direction perpendicular to the first direction toward the flame holes. The guide portion may be arranged between one end and the other end of the gas channel. The guide portion may be formed in a direction inclined with respect to the first direction and the second direction, respectively.

[0030] The angle between the surface of the guide portion and the surface of the gas channel facing the tube outlet can be formed between 100° and 140°.

[0031] A burner cap may be laminated on the upper burner head. A plurality of upper flame holes may be formed on the upper burner head. An upper gas channel may be formed between the upper burner head and the burner cap, the upper gas channel being partitioned at a different height from the gas channel.

[0032] The above guide portion may extend in an inclined direction toward the upper flame holes between the burner cap and the upper burner head.

[0033] Based on the radial direction of the upper burner head, the guide portion can extend in a direction that widens the vertical height of the upper gas channel toward the upper flame holes.

[0034] The guide portion may be positioned to face the upper flame holes based on the radial direction of the upper burner head.

[0035] A relative guide section may be formed to be inclined at a position facing the guide section based on the radial direction of the upper burner head.

[0036] An outlet slope may be formed at the edge of the above tube outlet. The outlet slope may extend in a downwardly inclined direction toward the plurality of salt holes.

[0037] The cooking appliance according to the present invention as discussed above has the following effects.

[0038] The cooking appliance of the present invention comprises a gas channel configured to deliver a mixed gas to each of the flame holes. The gas channel is provided with a guide member, which may extend in an inclined direction toward the flame holes where a flame is generated. The guide member, which extends in an inclined direction, may guide the mixed gas introduced into the gas channel to flow toward the flame holes without backflow. Accordingly, backfire or gas leakage due to backflow of the mixed gas can be prevented, and the usability of the appliance can be improved.

[0039] Furthermore, the guide portion of the present invention can be integrated into the burner head to form part of a gas channel. Thus, the present invention can guide the mixed gas toward the flame hole through the gas channel within the burner without any additional components. Therefore, the present invention can add a backfire prevention function without complicating the structure of the home appliance or increasing the number of parts.

[0040] Furthermore, according to the present invention, the guide member can gradually reduce the height of the gas channel toward the flame holes. This gradually reduced height of the gas channel can facilitate smooth diffusion of the mixed gas toward the flame holes. Consequently, combustion in the flame holes can be more stable and even.

[0041] In one embodiment of the present invention, the guide portion may form both a portion of the lower gas channel and a portion of the upper gas channel. The guide portion may prevent the backflow of the mixed gas in the lower gas channel and induce the radial diffusion of the mixed gas in the upper gas channel. In this way, since a single guide portion can assist the flow of the mixed gas in two different gas channels, even when the present invention is applied to a home appliance having a multi-layer structure, the smooth supply and combustion of the mixed gas can be achieved.

[0042] Figure 1 is a perspective view showing an example of a cooking appliance according to the present invention.

[0043] Figure 2 is a perspective view showing the structure of an upper plate and a burner constituting one embodiment of the present invention.

[0044] Figure 3 is a perspective view showing the structure of a burner constituting one embodiment of the present invention.

[0045] Figure 4 is a perspective view showing the components constituting a burner according to an embodiment of the present invention in an exploded manner.

[0046] FIG. 5 is a perspective view showing the components constituting a burner according to an embodiment of the present invention, taken from a different angle than FIG. 4.

[0047] Fig. 6 is a perspective view showing a burner constituting an embodiment of the present invention with the burner cap omitted.

[0048] Fig. 7 is a perspective view showing the upper burner head and the lower burner head, which constitute an embodiment of the present invention, separated.

[0049] Figure 8 is a cross-sectional view taken along line VIII-VIII' of Figure 3.

[0050] Fig. 9 is a cross-sectional view showing in detail the internal structure of the upper gas channel and the lower gas channel constituting one embodiment of the present invention.

[0051] Fig. 10 is a cross-sectional view showing the internal structure of a burner constituting one embodiment of the present invention.

[0052] Fig. 11 is an enlarged cross-sectional view of a portion of Fig. 10.

[0053] Fig. 12 is a cross-sectional view showing in detail the internal structure of the upper gas channel and the lower gas channel constituting one embodiment of the present invention.

[0054] Fig. 13 is a cross-sectional view showing in detail the structure of a lower gas channel constituting one embodiment of the present invention.

[0055] Fig. 14 is a cross-sectional view showing in detail the structure of a lower gas channel constituting one embodiment of the present invention.

[0056] Fig. 15 is a cross-sectional view showing the structure of a burner constituting a second embodiment of the present invention.

[0057] Fig. 16 is a cross-sectional view showing the structure of a burner constituting a third embodiment of the present invention.

[0058] Fig. 17 is a cross-sectional view showing the structure of a burner constituting the fourth embodiment of the present invention.

[0059] Fig. 18 is a cross-sectional view showing the structure of a burner constituting the fifth embodiment of the present invention.

[0060] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. When designating components in each drawing, it should be noted that, where possible, identical components will be given the same reference numerals, even if they appear in different drawings. Furthermore, when describing embodiments of the present invention, if a detailed description of a related known structure or function is deemed to hinder understanding of the embodiments of the present invention, such detailed description will be omitted.

[0061] The present invention relates to a cooking appliance, which includes a gas burner device (100A-100D). Referring to Fig. 1, a gas burner device (100A-100D, hereinafter referred to as "burner device (100A-100D)") is disposed on the upper portion of the cooking appliance. As shown in Fig. 1, the burner device (100A-100D) may be disposed so as to be exposed on the upper portion of the cooking appliance. As another example, the burner device (100A-100D) may be disposed inside the cooking appliance, or may be disposed inside and outside the cooking appliance, respectively. Hereinafter, an example in which the burner device (100A-100D) is disposed on the upper portion of the cooking appliance will be described.

[0062] For reference, the term "radial direction" hereinafter refers to a direction toward or away from the center of the burner head (130) along the radius of the burner head (130) constituting the burner device (100A). The term "circumferential direction" hereinafter refers to a direction proceeding along a circle or circumference, which is the shape of the burner head (130) or the gas channel (GS1, GS2). In addition, the term "height direction" hereinafter refers to a direction in which the upper burner head (140) and the lower burner head (160) constituting the burner head (130) are stacked on each other.

[0063] The above burner devices (100A-100D) are configured to combust a mixed gas, which is a mixture of gas and air, and cook food with the flames generated by the combustion. The burner devices (100A-100D) are formed with a plurality of flame holes (142, 162), so as to generate a plurality of flames (F1, F2). The present invention can ensure that the mixed gas supplied to the plurality of flame holes (142, 162) is supplied smoothly without backflow. Below, the burner devices (100A-100D) will be described with a focus on this structure. For reference, the mixed gas below refers to a mixture of gas and air.

[0064] As shown in Fig. 1, in the present embodiment, an oven section (40, 50) is arranged at the bottom of the cooking appliance, and a cooktop section (20) including a plurality of burner devices (100A-100D) is provided at the top. The cooking appliance may be configured as a built-in or non-built-in type cooking appliance having at least one cooking chamber therein. As another example, the cooking appliance may omit the oven section (40, 50) and be configured only with the cooktop section (20). The oven section (40, 50) may be referred to as a grill section, and the cooktop section (20) may be referred to as a top section, respectively.

[0065] Looking at the structure of the above cooking appliance, the exterior of the cooking appliance is formed by an outer body (10). The outer body (10) may form the skeleton of the cooking appliance, excluding the door positioned at the front. A separate inner housing (not shown) may be positioned inside the outer body (10).

[0066] The above cooktop unit (20) includes an upper plate (21, see FIG. 4) that forms the upper surface appearance of the cooktop unit (20). At least one burner device (100A-100D) for heating food to be cooked or a container containing food is arranged on the upper plate (21). In the present embodiment, a total of four burner devices (100A-100D) are arranged on the upper plate (21). This structure will be described again below.

[0067] The above cooktop unit (20) may be equipped with a grate (25). The grate (25) is a frame on which a cooking vessel can be placed on the upper side of the burner device (100A). The grate (25) is detachably mounted on the upper plate (21). The grate (25) may be positioned on the upper side of the burner device (100A). Reference numeral 27 of the drawing represents an exhaust plate, and the exhaust plate (27) can allow air to flow into and out of the cooking appliance.

[0068] A front panel (30) may be arranged above the oven section (40, 50) and in front of the cooktop section (20). The front panel (30) may include knobs (31) for operating the oven section (40, 50) and the cooktop section (20). Each of the plurality of knobs (31) may operate separate burner devices (100A) and the oven device. Instead of a rotary knob, an input device such as a switch, mechanical or electronic button, etc. may be provided. The front panel (30) may also be viewed as an operating device.

[0069] The front panel (30) may be equipped with a display panel (35). The display panel (35) may display information about the cooking appliance. The display panel (35) may be configured as a touch panel and may be used by a user to operate the cooking appliance. In other words, the display panel (35) may be a type of control unit. As another example, the display panel (35) may be omitted.

[0070] Looking at the above oven section (40, 50), the oven section (40, 50) may include a plurality of oven devices. In the present embodiment, the oven section (40, 50) includes a first oven device (40) and a second oven device (50). The first oven device (40) and the second oven device (50) are arranged at different heights. The first oven device (40) and the second oven device (50) may each be formed with separate cooking chambers that are partitioned from each other.

[0071] The first door (45) of the first oven device (40) may be operated in a pull-down manner in which the upper portion rotates up and down around the lower portion. As another example, the first door (45) may be operated in a side-swing manner in which it opens sideways. Drawing reference numeral 47 indicates a handle for opening and closing the first door (45).

[0072] The second door (55) of the second oven device (50) may be operated in a manner that slides forward and backward. As another example, similar to the first door (45) above, the second door (55) may also be operated in a type of pull-down manner in which the upper portion rotates up and down around the lower portion. Drawing reference numeral 57 indicates a handle for opening and closing the second door (55).

[0073] Next, let's look at the above burner devices (100A-100D). As previously explained, this embodiment includes a total of four burner devices (100A-100D). In order to distinguish the four burner devices (100A-100D) in the drawing, different drawing reference numerals (100A-100D) are assigned to the four burner devices (100A-100D). Hereinafter, the burner device (100A) located on the right front will be described as an example.

[0074] Referring to Fig. 2, the oven section (40, 50) and a portion of the grate (25) are illustrated with the portion omitted. As can be seen, when the grate (25) is removed, the burner cap (180) constituting the burner device (100A) can be exposed. In the present embodiment, the burner device (100A) includes a burner cap (180) that covers the upper flame holes (142) among the flame holes (142, 162) constituting concentric circles. This structure will be described again below.

[0075] FIG. 3 illustrates a burner device (100A) according to the present embodiment. The burner device (100A) includes a burner body (110), a burner head (130), and a burner cap (180). The burner body (110), the burner head (130), and the burner cap (180) may be stacked to form the burner device (100A). An external gas may be supplied to the burner device (100A) through a separate pipe (not shown). The gas supplied in this manner may be mixed with primary air to form a mixed gas during the process of passing through the burner device (100A). As will be described further below, the burner head (130) may include an upper burner head (140) and a lower burner head (160).

[0076] A portion of the device (100A) may be exposed upward through a plate hole (22, see FIG. 4) of the upper plate (21). The remaining portion of the burner device (100A) may be positioned below the upper plate (21) and may not be exposed. With reference to FIG. 3, a portion of the side surface of the burner cap (180) and the burner head (130) may be exposed to the outside.

[0077] The above burner device (100A) includes a burner body (110) disposed at the bottom and a burner head (130) stacked on the top of the burner body (110). The burner body (110) is disposed at the bottom of the upper plate, i.e., inside the cooktop unit (20). Accordingly, the burner body (110) may not be exposed to the outside. The burner body (110) may receive an external gas and form an inlet passage for the introduction of primary air.

[0078] Referring to FIGS. 4 and 5, the burner body (110) includes a first nozzle holder part (111) and a second nozzle holder part (113). In the present embodiment, since the burner device (100A) includes flame holes (142, 162) having different diameters, it is necessary to supply gas to the flame holes (142, 162) through different paths. To this end, the burner body (110) is provided with a first nozzle holder part (111) and a second nozzle holder part (113). As another example, if the burner device (100A) has only lower flame holes (162) without upper flame holes (142), either the first nozzle holder part (111) or the second nozzle holder part (113) may be omitted.

[0079] A disc-shaped body plate (120) constituting the burner body (110) is provided on the upper portion of the burner body (110). The body plate (120) may be formed integrally with the burner body (110), or may be formed separately and then assembled. The body plate (120) may be fixed to the upper plate (21) through a fastener or the like.

[0080] The burner head (130) is laminated on the upper portion of the body plate (120). The upper plate (21) may be placed between the upper portion of the body plate (120) and the burner head (130). More precisely, the upper plate (21) may be placed between the upper portion of the body plate (120) and the lower burner head (160) among the burner heads (130).

[0081] In this embodiment, the burner head (130) includes an upper burner head (140) and a lower burner head (160) which are arranged at different heights along the tube path (T1). An upper gas channel (GS1) and a lower gas channel (GS2) through which a mixed gas flows are formed in the upper burner head (140) and the lower burner head (160), respectively. The upper gas channel (GS1) may be formed between the upper burner head (140) and the burner cap (180). The lower gas channel (GS2) may be formed between the upper burner head (140) and the lower burner head (160). This structure will be described in more detail below.

[0082] A plurality of flame holes (142, 162) are formed in the burner head (130). A plurality of upper flame holes (142) may be formed in the upper burner head (140). A plurality of lower flame holes (162) may be formed in the lower burner head (160). The plurality of upper flame holes (142) and the plurality of lower flame holes (162) may be arranged at different heights. The plurality of upper flame holes (142) and the plurality of lower flame holes (162) may be arranged along the circumferential direction of the upper burner head (140) and the lower burner head (160), respectively. The plurality of upper flame holes (142) and the plurality of lower flame holes (162) may have the same diameter or different diameters.

[0083] Referring to Fig. 4, the upper burner head (140) is provided with a guide portion (150). The guide portion (150) may form a side surface of a central heel (144) in which a portion of the center of the upper burner head (140) protrudes upward. The guide portion (150) may be provided around the edge of the central heel (144). The guide portion (150) can be viewed as being formed by the central heel (144) protruding upwardly from the upper burner head (140). Looking from above in FIG. 4, the central heel (144) and the guide portion (150) protrude upward from the upper surface (143) of the upper burner head (140), and looking from below in FIG. 5, the central heel (144) and the guide portion (150) are sunken upward from the lower surface (143') of the upper burner head (140). The detailed structure and function of this guide portion (150) will be examined in detail below.

[0084] Referring again to FIGS. 4 and 5, a portion of the upper plate (21) is also illustrated to help understand the relative positions of the burner device (100A) and the upper plate (21). As seen therein, the burner body (110) is disposed at the lowest portion of the burner device (100A). The burner body (110) may be covered by the upper plate (21) and not be exposed upward. A burner cap (180) is disposed at the highest portion of the burner device (100A), and a burner head (130) is disposed between the burner cap (180) and the burner body (110).

[0085] For convenience of explanation, let's first look at the burner cap (180). The burner cap (180) can shield the upper portion of the upper gas channel (GS1) to guide the mixed gas into the plurality of upper flame holes (142). That is, the burner cap (180) can define a portion of the upper gas channel (GS1) and form the upper surface of the upper gas channel (GS1). When the burner cap (180) covers the upper portion of the upper burner head (140), the plurality of upper flame holes (142) can be exposed to the side of the upper burner head (140). In addition, the burner cap (180) covers the open upper portion of the upper burner head (140) to block foreign substances, such as soup overflowing from a cooking vessel, from flowing into the space inside the burner head (130).

[0086] Looking at the burner body (110), the burner body (110) includes a first nozzle holder part (111), a second nozzle holder part (113), and a body plate (120). First, looking at the first nozzle holder part (111), the first nozzle holder part (111) is connected to a first nozzle (not shown) for supplying gas. The first nozzle holder part (111) transfers the gas supplied from the first nozzle to the upper gas channel (GS1). The first nozzle holder part (111) may have a shape that is elongated in one direction.

[0087] A first gas supply path (112, see FIG. 8) is formed in the first nozzle holder part (111). A first supply path inlet (112a, see FIG. 4) and a first supply path outlet (112b, see FIG. 8) are formed at both ends of the first gas supply path (112), respectively. The first supply path inlet (112a) is open in the left-right direction (based on FIG. 4) so ​​that the first nozzle can be coupled thereto. Unlike the first supply path inlet (112a), the first supply path outlet (112b) is open in the vertical direction (based on FIG. 8) so as to face the inner mixing tube (146) to be described below. For reference, in the present embodiment, the inner mixing tube (146) is provided in the upper burner head (140).

[0088] Fig. 8 shows the air and gas supply paths for generating upper flames (F1). Specifically, the primary air inflow path toward the inner mixing tube (146) is represented as A1, the secondary air inflow path as A2, and the gas supply path as G1. Referring to this, the process of supplying mixed gas to the inner mixing tube (146) is shown. The gas supplied to the first supply path inlet (112a) moves along the first gas supply path (112) and is then delivered to the inner mixing tube (146) through the first supply path outlet (112b) (G1).

[0089] At this time, the inner mixing tube (146) and the first supply path outlet (112b) are spaced apart from each other, and an inner chamber (122) is formed in the portion where the inner mixing tube (146) and the first supply path outlet (112b) are spaced apart from each other so as to face each other. Primary air can be introduced through the side of the inner chamber (122) (A1). More precisely, the primary air can be introduced into the spaced gap between the body plate (120) and the lower burner head (160). Accordingly, the gas is mixed with the primary air in the inner chamber (122) and then supplied to the inner mixing tube (146). Drawing symbol MG1 indicates a path along which the mixed gas flows along the upper gas channel (GS1).

[0090] Referring again to FIGS. 4 and 5, the second nozzle holder part (113) is connected to a second nozzle (not shown) for supplying gas. The second nozzle holder part (113) transfers the gas supplied from the second nozzle to the lower gas channel (GS2). The second nozzle holder part (113) may have a shape that is elongated in one direction. At this time, the second nozzle holder part (113) may be arranged in a direction perpendicular to the first nozzle holder part (111). More precisely, the second nozzle holder part (113) and the first nozzle holder part (111) extend perpendicular to each other with the inner chamber (122) as the center. As another example, the second nozzle holder part (113) may be provided at a different height from the first nozzle holder part (111).

[0091] Referring to Fig. 8, a second gas supply path (114) is formed in the second nozzle holder part (113). A second supply path inlet (114a) and a second supply path outlet (114b) are formed at both ends of the second gas supply path (114), respectively. The second supply path inlet (114a) is open in the left-right direction (based on Fig. 8) so that the second nozzle can be coupled thereto. Unlike the second supply path inlet (114a), the second supply path outlet (114b) is open in the vertical direction (based on Fig. 8) so that it can face the outer mixing tube (167) to be described below.

[0092] Fig. 8 shows the air and gas supply paths for generating lower flames (F2). Specifically, the primary air inflow path is represented by A1', the secondary air inflow path is represented by A2', and the gas supply path is represented by G2. Referring to this, the process of supplying the mixed gas to the outer mixing tube (167) is shown. The gas supplied to the second supply path inlet (114a) moves along the second gas supply path (114) and is then delivered to the outer mixing tube (167) through the second supply path outlet (114b) (G2).

[0093] At this time, the outer mixing tube (167) and the second supply path outlet (114b) are spaced apart from each other, and the inner chamber (122) is formed between the outer mixing tube (167) and the second supply path outlet (114b). Primary air can be introduced through the side of the inner chamber (122) (A1'). More precisely, the primary air can be introduced into the spaced gap between the body plate (120) and the lower burner head (160). Accordingly, the gas is mixed with the primary air in the inner chamber (122) and then supplied to the outer mixing tube (167). Drawing symbol MG2 indicates a path along which the mixed gas flows along the lower gas channel (GS2).

[0094] Referring again to FIGS. 4 and 5, the body plate (120) may have a roughly circular shape. The body plate (120) is positioned above the first nozzle holder portion (111) and the second nozzle holder portion (113). The body plate (120) may assist in mounting the burner head (130). A path for supplying primary air may be formed between the upper surface (121) of the body plate (120) and the lower surface (163') of the lower burner head (160).

[0095] An inner chamber (122) may be formed at the center of the body plate (120). The inner chamber (122) is connected to the inner mixing tube (146) and the outer mixing tube (167). The first supply path outlet (112b) and the second supply path outlet (114b) may be opened at the lower portion of the inner chamber (122). (See FIG. 8) Since the inner mixing tube (146) and the outer mixing tube (167) are arranged at the upper portion of the inner chamber (122), as a result, the inner mixing tube (146) and the first supply path outlet (112b) may be connected through the inner chamber (122), and also the outer mixing tube (167) and the second supply path outlet (114b) may be connected.

[0096] The above body plate (120) may be provided with a discharge unit (125). The discharge unit (125) is a portion where an end of a spark plug (not shown), which is an ignition device that generates a spark for the operation of the burner device (100A), is located. The discharge unit (125) may be arranged on the outside of the inner chamber (122).

[0097] A support spacer (128) may be provided on the upper surface (121) of the body plate (120). The support spacer (128) may protrude from the upper surface (121) of the body plate (120) and support the lower portion of the lower burner head (160) while being spaced apart from the upper surface (121).

[0098] Mis-assembly prevention parts (129A, 129B) may be provided on the upper surface (121) of the body plate (120). The mis-assembly prevention parts (129A, 129B) protrude from the upper surface (121) of the body plate (120) and are coupled to fastening holes (169a, 169b, see FIG. 5) provided in the lower burner head (160). The mis-assembly prevention parts (129A, 129B) are arranged spaced apart from each other around the inner chamber (122). The mis-assembly prevention parts (129A, 129B) may be configured in multiple pieces and may have different shapes. At the same time, the plurality of fastening holes (169a, 169b) may have different shapes corresponding to each other to prevent the assembly direction of the burner body (110) and the lower burner head (160) from being misaligned. In addition, the misassembly prevention parts (129A, 129B) may also play a role in supporting the lower portion of the lower burner head (160) together with the support spacer (128).

[0099] Next, the burner head (130) will be examined. The burner head (130) can be supported on the body plate (120). The burner head (130) protrudes above the upper plate (21) while being supported on the body plate (120). The burner head (130) forms a gas channel together with the burner cap (180) and has flame holes (142, 162) to generate a flame by combusting gas.

[0100] In the present embodiment, the burner head (130) includes two burner heads. The two burner heads are composed of an upper burner head (140) and a lower burner head (160). The upper burner head (140) and the lower burner head (160) are stacked on each other. The burner cap (180) is stacked on the upper portion of the upper burner head (140). Upper flame holes (142) are exposed between the upper burner head (140) and the burner cap (180), and the lower flame holes (162) are exposed between the upper burner head (140) and the lower burner head (160).

[0101] Looking at the upper burner head (140), the upper burner head (140) may be approximately in the shape of a disc. In the present embodiment, the upper burner head (140) having the shape of a disc is formed with a plurality of upper flame holes (142). The plurality of upper flame holes (142) are arranged along the circumferential direction at the edge of the upper burner head (140). The upper gas channel (GS1) is formed inside the plurality of upper flame holes (142). More precisely, the upper gas channel (GS1) may be a space that is continuous along the circumferential direction of the upper burner head (140) between the upper surface (143) of the upper burner head (140), the central heel (144) to be described below, and the upper head wall (141), and the space surrounded by the burner cap (180). This structure will be described again below.

[0102] The upper burner head (140) may include the upper head wall (141) and the central heel (144). The upper head wall (141) is provided along the edge of the upper burner head (140). The upper head wall (141) may protrude upward to form the upper gas channel (GS1) between itself and the central heel (144). The plurality of upper flame holes (142) are arranged at intervals in the upper head wall (141).

[0103] Referring to Fig. 5, in the present embodiment, an inner flame hole wall (141') is provided at the bottom of the upper burner head (140). The inner flame hole wall (141') protrudes in the opposite direction to the upper head wall (141). That is, the inner flame hole wall (141') protrudes downward from the bottom surface (143') of the upper burner head (140). The inner flame hole wall (141') may be provided along the circumferential direction of the upper burner head (140) like the upper head wall (141). The inner flame hole wall (141') is provided at a position that is radially offset from the edge of the upper burner head (140) toward the center of the upper burner head (140).

[0104] Inner flame holes (142') are formed in the inner flame hole wall (141'). The inner flame holes (142') can be connected to the lower flame holes (162) of the lower burner head (160), which will be described below. The plurality of upper inner flame holes (142') are arranged inside the plurality of lower flame holes (162). That is, based on the radial direction of the upper burner head (140), the plurality of upper inner flame holes (142') are arranged closer to the center of the upper burner head (140) than the plurality of lower flame holes (162). Accordingly, the mixed gas introduced into the lower gas channel (GS2) can sequentially pass through the plurality of upper inner flame holes (142') and the plurality of lower flame holes (162). As another example, the plurality of upper inner flame holes (142') may be omitted. As another example, the lower flame holes (162) of the lower burner head (160) may be omitted, and the plurality of upper inner flame holes (142') may serve as the lower flame holes (162).

[0105] The upper burner head (140) may be provided with a center heel (144). The center heel (144) protrudes upward from the center of the upper burner head (140). The center heel (144) may have an approximately dome shape. The center heel (144) has an approximately circular shape based on a plane. The upper surface of the center heel (144) may have a planar structure. A guide portion (150) extending in a downwardly inclined direction is provided at the edge of the center heel (144). The specific structure of the guide portion (150) will be described again below. An upper surface (143) of the upper burner head (140) that is relatively recessed downward is arranged between the center heel (144) and the upper head wall (141). The upper surface (143) of the upper burner head (140) may be viewed as the bottom surface of the upper gas channel (GS1).

[0106] The inner mixing tube (146) may be connected to the center of the central hill (144). As shown in FIG. 5, the inner mixing tube (146) has a cylindrical shape extending downward from the center of the central hill (144). An inner tube flow path (T1) is formed at the center of the inner mixing tube (146), so that the inner mixing tube (146) becomes a type of mixed gas supply pipe. An inlet (146a) of the inner tube flow path (T1) is formed at the lower portion of the inner mixing tube (146), and as shown in FIG. 4, an outlet (146b) of the inner tube flow path (T1) is opened at the upper portion of the central hill (144). The mixed gas discharged through the outlet (146b) of the inner tube flow path (T1) can be supplied to the upper gas channel (GS1). Drawing reference numeral 147 represents a support leg, and the support leg (147) can support the bottom surface (183) of the burner cap (180). For reference, drawing reference numeral 181 represents the upper surface of the burner cap (180), which corresponds to the opposite side of the bottom surface (183) of the burner cap (180).

[0107] As shown in Fig. 5, an assembly boss (148) may be provided at the lower portion of the upper burner head (140). The assembly boss (148) has a cylindrical shape that protrudes from the lower portion of the upper burner head (140) toward the lower burner head (160). The assembly boss (148) is connected to the assembly hole (168) of the lower burner head (160). The lower burner head (160) and the upper burner head (140) may be assembled to each other by a fastening hole (not shown) that passes through the assembly hole (168) and the assembly boss (148), respectively. As another example, the fastening boss (148) may be omitted.

[0108] The lower burner head (160) is arranged between the upper burner head (140) and the burner body (110). The lower burner head (160) forms the lower gas channel (GS2) between itself and the upper burner head (140). The mixed gas supplied to the lower gas channel (GS2) may be combusted in the lower flame holes (162) formed in the lower burner head (160) to generate the lower flames (F2).

[0109] The lower burner head (160) has a roughly circular plate structure, similar to the upper burner head (140). The lower burner head (160) is formed with a diameter similar to that of the upper burner head (140), so that most of the upper surface (163) of the lower burner head (160) can be shielded by the upper burner head (140). In this way, the lower gas channel (GS2) is formed in the portion shielded by the upper burner head (140).

[0110] The lower burner head (160) is provided with a lower head wall (161) surrounding the edge of the lower burner head (160). The lower head wall (161) may protrude from the edge of the lower burner head (160) toward the upper burner head (140). The lower head wall (161) is provided with a plurality of lower flame holes (162). As described above, the plurality of lower flame holes (162) are connected to the upper inner flame holes (142') provided in the upper burner head (140), so that the mixed gas may pass through the upper inner flame holes (142') and be transmitted to the plurality of lower flame holes (162).

[0111] The lower burner head (160) is provided with an upper surface (163) of the lower burner head (160). The upper surface (163) of the lower burner head (160) is relatively sunken between the lower head wall (161) and the inner head wall (166). The upper surface of the lower burner head (160) can be regarded as the bottom surface of the lower gas channel (GS2). The upper surface (163) of the lower burner head (160) can be a continuous circle in the circumferential direction of the lower burner head (160) with the inner head wall (166) as the center.

[0112] A recessed portion (165) may be provided on the side of the lower burner head (160). The recessed portion (165) may have a shape in which a portion of the lower head wall (161) is recessed in the radial direction. The recessed portion (165) corresponds to the discharge portion (125) of the body plate (120). The recessed portion (165) is positioned at a position corresponding to the discharge portion (125). That is, an end of an ignition plug (not shown), which is an ignition device that generates a spark for the operation of the burner device (100A), may be positioned below the recessed portion (165). Accordingly, a spark generated from the ignition plug may be transmitted to the lower flame holes (162) and the upper flame holes (142) through the recessed portion (165).

[0113] An inner head wall (166) may be provided at the center of the lower burner head (160). The inner head wall (166) protrudes upward from the center of the lower burner head (160). The inner head wall (166) may surround the inner mixing tube (146). That is, the inner mixing tube (146) is arranged inside the inner head wall (166). An inner space (T1a) surrounding the inner mixing tube (146) is formed inside the inner head wall (166). An outlet (166b) of the inner space (T1a) is opened upward of the lower burner head (160).

[0114] The lower burner head (160) may be equipped with an outer mixing tube (167). The outer mixing tube (167) serves as a type of supply path through which the mixed gas is supplied. The outer mixing tube (167) may be opened downwards of the lower burner head (160), i.e., toward the burner body (110).

[0115] The above outer mixing tube (167) may protrude upward from the lower burner head (160). Referring to FIG. 4, a portion of the outer mixing tube (167) protrudes from the upper surface (163) of the lower burner head (160). At this time, the height at which the outer mixing tube (167) protrudes upward is lower than the height of the inner head wall (166). In the present embodiment, the outer mixing tube (167) is configured as one, but as another example, a plurality of outer mixing tubes (167) may be provided in the lower burner head (160).

[0116] An outer tube passage (T2) is formed inside the outer mixing tube (167). The mixed gas is supplied to the lower gas channel (GS2) through the outer tube passage (T2). The inlet (167a) of the outer tube passage (T2) is opened downward. The outlet (167b) of the outer tube passage (T2) is opened to the upper surface (163) of the lower burner head (160), which becomes the lower gas channel (GS2). The mixed gas is supplied to the lower gas channel (GS2) through the outlet (167b) of the outer tube passage (T2) that is thus opened.

[0117] An assembly hole (168) may be formed through the upper surface (163) of the lower burner head (160). The assembly hole (168) is formed at a position corresponding to the assembly boss (148) of the upper burner head (140). The lower burner head (160) and the upper burner head (140) may be assembled to each other by fasteners (not shown) that penetrate the assembly hole (168) and the assembly boss (148), respectively. As another example, the assembly hole (168) may be omitted.

[0118] The lower burner head (160) may be formed with fastening holes (169a, 169b). The fastening holes (169a, 169b) may be opened from the lower burner head (160) toward the burner body (110). The mis-assembly prevention parts (129A, 129B) of the body plate (120) are inserted into the fastening holes (169a, 169b). The fastening holes (169a, 169b) may be configured in multiple numbers, similar to the mis-assembly prevention parts (129A, 129B). At this time, the fastening holes (169a, 169b) may have different shapes to prevent the assembly direction of the burner body (110) and the lower burner head (160) from being distorted.

[0119] FIG. 6 illustrates a state in which the burner cap (180) is omitted. If the burner cap (180) is omitted, the upper gas channel (GS1) is exposed. If the burner cap (180) is omitted, the central heel (144) is exposed. If the burner cap (180) is omitted, the upper portion of the guide portion (150) formed at the edge of the central heel (144) is also exposed. The guide portion (150) may constitute the inner wall surface of the upper gas channel (GS1).

[0120] The above guide portion (150) extends in a downwardly inclined direction toward the upper flame holes (142). Accordingly, the upper gas channel (GS1) becomes narrower from the top to the bottom of the central hill (144). Conversely, the upper gas channel (GS1) becomes wider toward the top of the central hill (144). In this way, the mixed gas discharged through the outlet of the inner mixing tube (146) gradually slows down as it passes through the guide portion (150) and can be uniformly spread toward the upper flame holes (142). This structure will be described again below.

[0121] Here, the inclined direction means a direction inclined from the direction in which the upper burner head (140) and the lower burner head (160) are stacked on each other. In addition, the inclined direction is also a direction inclined from the radial direction of the upper burner head (140).

[0122] As shown in Fig. 6, when the upper burner head (140) and the lower burner head (160) are coupled to each other, the plurality of upper flame holes (142) and the plurality of lower flame holes (162) are opened laterally of the burner device. The lower flame holes (162) are arranged below the upper flame holes (142). The upper portions of the lower flame holes (162) are blocked by the bottom surface (143') of the upper burner head (140). The upper portions of the upper flame holes (142) are blocked by the bottom surface (183) of the burner cap (180).

[0123] FIG. 7 illustrates the upper burner head (140) and the lower burner head (160) separated from each other. As can be seen therein, the inner mixing tube (146) provided in the upper burner head (140) can be inserted into the inner head wall (166) provided in the lower burner head (160), and the inner mixing tube (146) and the inner head wall (166) have a concentric structure. When the inner mixing tube (146) is inserted into the inner head wall (166), the outlet (146b) of the inner tube flow path (T1) can be positioned further downward than the inner head wall (166).

[0124] A mounting portion (144a) may be provided at the center of the upper burner head (140) surrounding the inner mixing tube (146). The mounting portion (144a) surrounds the inner mixing tube (146) to form a roughly ring structure. The upper portion (166') of the inner head wall (166) is in close contact with the mounting portion (144a). This appearance is well illustrated in Fig. 9.

[0125] The outlet (167b) of the outer mixing tube (167) provided in the lower burner head (160) is opened toward the bottom surface (143') of the upper burner head (140). As shown in Fig. 7, the bottom surface (143') of the upper burner head (140) has an upwardly sunken structure. In other words, this sunken portion becomes the central heel (144) protruding upwardly of the upper burner head (140). The sunken portion of the bottom surface (143') of the upper burner head (140) can constitute the upper portion of the lower gas channel (GS2). The lower gas channel (GS2) is formed between the bottom surface (143') of the upper burner head (140) and the upper surface (163) of the lower burner head (160).

[0126] The lower portion of the guide portion (150) is provided on the bottom surface (143') of the upper burner head (140). The lower portion of the guide portion (150) constitutes the upper portion of the lower gas channel (GS2). The guide portion (150) causes the height of the lower gas channel (GS2) to gradually decrease toward the lower flame holes (162) based on the radial direction of the lower burner head (160). The guide portion (150) can cause the mixed gas discharged through the outlet (167b) of the outer tube flow path (T2) to flow toward the lower flame holes (162) without flowing back after hitting the wall surface (upper surface) of the lower gas channel (GS2). This structure will be described again below.

[0127] FIG. 8 is a cross-sectional view taken along line VIII-VIII' of FIG. 6, and FIG. 9 shows an enlarged view of the inside of the burner device. Referring to FIGS. 8 and 9, the flow of the mixed gas through the guide portion (150) will be described. First, looking at the flow of the mixed gas through the upper gas channel (GS1), primary air is introduced from the outside toward the inner mixing tube (146) (A1). At this time, the primary air may be introduced through the side of the inner chamber (122). More precisely, the primary air may be introduced into the gap between the body plate (120) and the lower burner head (160).

[0128] At the same time, the gas supplied to the first supply path inlet (112a) moves along the first gas supply path (112) and is then delivered to the inner mixing tube (146) through the first supply path outlet (112b) (G1). The gas supplied through the first supply path outlet (112b) is mixed with the primary air in the process of being delivered to the inner tube path (T1) of the inner mixing tube (146). That is, after the gas is mixed with the primary air in the inner chamber (122), the mixed gas is supplied to the inner tube path (T1) (MG1).

[0129] The mixed gas discharged through the outlet (146b) of the inner tube channel (T1) flows into the upper gas channel (GS1). The mixed gas flowing into the upper gas channel (GS1) can flow into the upper tube channel (T1) formed between the central heel (144) and the bottom surface (183) of the burner cap (180). The mixed gas flows outward along the radial direction of the upper burner head (140) from the central heel (144). In this process, the mixed gas can be guided to the first guide surface (151') of the guide part (150). The mixed gas guided to the first guide surface (151') is combusted in the plurality of upper flame holes (142), thereby generating an upper flame. Reference numeral BI1 indicates an upper combustion part formed between the burner cap (180) and the upper burner head (140).

[0130] At this time, the first guide surface (151') has a structure that is inclined so that the height gradually decreases toward the outside along the radial direction of the upper burner head (140). Accordingly, the upper gas channel (GS1) becomes wider from the top to the bottom of the central hill (144). In this way, the mixed gas that was flowing at high speed / low pressure between the relatively narrow upper surface of the central hill (144) and the bottom surface (183) of the burner cap (180) can flow at low speed / high pressure while passing through the first guide surface (151'). And, as the mixed gas is evenly spread toward the plurality of upper flame holes (142), uniform upper flames (F1) can be generated in all of the upper flame holes (142).

[0131] Meanwhile, the guide portion (150) can also guide the flow of the mixed gas supplied to the lower gas channel (GS2). Referring to Fig. 11, primary air is introduced from the outside toward the outer mixing tube (167) (A1'). At this time, the primary air can be introduced through the side of the inner chamber (122). More precisely, the primary air can be introduced into the gap between the body plate (120) and the lower burner head (160).

[0132] At the same time, gas is supplied to the second supply path inlet (114a) (G2). The gas supplied to the second supply path inlet (114a) moves along the second gas supply path (114) and is then delivered to the inner chamber (122) through the second supply path outlet (114b). At this time, the gas may be mixed with the primary air that has entered the inner chamber (122) through the side of the inner chamber (122). In this way, the gas is mixed with the primary air in the inner chamber (122) to become a mixed gas, and then supplied to the inlet (167a) of the outer tube flow path (T2) (MG2).

[0133] The mixed gas discharged through the outlet (167b) of the outer tube path (T2) flows into the lower gas channel (GS2). The mixed gas flowing into the lower gas channel (GS2) can flow between the upper burner head (140) and the lower burner head (160). For reference, in FIG. 11, the path along which the mixed gas flows along the lower gas channel (GS2) is represented by a solid arrow. The mixed gas flows outward along the radial direction of the lower burner head (160) from the outlet (167b) of the outer tube path (T2). In this process, the mixed gas can be guided to the second guide surface (151) of the guide part (150). The mixed gas guided to the second guide surface (151) is combusted in the plurality of lower flame holes (162), thereby generating a lower flame. Drawing symbol BI2 indicates a lower combustion section formed between the lower burner head (160) and the upper burner head (140).

[0134] After passing through the outer tube flow path (T2), the above-mentioned mixed gas is discharged in the direction in which the outlet (167b) of the outer tube flow path (T2) is opened. Here, the direction in which the outlet (167b) of the outer tube flow path (T2) is opened is indicated by arrow ① in Fig. 9. Based on the drawing, the outlet (167b) of the outer tube flow path (T2) is opened in the vertical direction, which is the same as the direction in which the upper burner head (140) and the lower burner head (160) are stacked on each other. Hereinafter, the direction in which the outlet (167b) of the outer tube flow path (T2) is opened is referred to as the first direction.

[0135] Referring to FIGS. 9 to 11, the guide part (150) can prevent the mixed gas discharged through the outlet (167b) of the outer tube channel (T2) from flowing back into the outer tube channel (T2) and becoming backflow gas (RG). More precisely, the mixed gas discharged through the outlet (167b) of the outer tube channel (T2) is prevented from flowing back into the outlet (167b) of the outer tube channel (T2) by flowing in the opposite direction (the direction of the dotted line in FIG. 9) after colliding with the upper surface of the lower gas channel (GS2). The guide part (150) can guide the mixed gas colliding with the upper surface of the lower gas channel (GS2), i.e., the bottom surface (143') of the upper burner head (140), toward the plurality of lower flame holes (162) (the direction of arrow ② in FIG. 9), thereby preventing backflow gas (RG).

[0136] For reference, if the mixed gas flows back in the opposite direction (the dotted line direction of FIGS. 9 and 11) after colliding with the upper surface of the lower gas channel (GS2), it may leak through the gap between the burner body (110) and the lower burner head (160) and become backflow gas (RG). This backflow gas (RG) may combust at a location other than the flame hole, resulting in backfire. Backfire may cause explosive noise and damage to components, but in the present invention, backfire is prevented by the guide portion (150).

[0137] The above guide part (150) will be examined in detail. The guide part (150) may be formed along the edge of the central heel (144). The guide part (150) may be formed continuously along the circumferential direction of the lower burner head (160). The guide part (150) extends in an inclined direction toward the plurality of lower flame holes (162). Referring to FIG. 9, the guide part (150) extends in a downward inclined direction toward the outside based on the radial direction of the lower burner head (160). Accordingly, the mixed gas can naturally flow toward the upper inner flame holes (142') along the second guide surface (151) of the guide part (150). Arrow ③ in FIG. 9 indicates the direction in which the mixed gas passes the second guide surface (151) and moves through the lower gas channel (GS2).

[0138] The surface of the guide portion (150) may form an obtuse angle with the surface of the gas channel facing the tube outlet (167b). Here, the tube outlet (167b) refers to the outlet (167b) of the outer tube flow path (T2), and the gas channel (GS2) refers to the lower gas channel (GS2). That is, the surface of the lower gas channel (GS2) facing the outlet (167b) of the outer tube flow path (T2) and the bottom surface (143') of the upper burner head (140) and the second guide surface (151) form an obtuse angle. In this way, the second guide surface (151) may guide the flow direction of the mixed gas to the upper inner flame holes (142').

[0139] It is preferable that the angle between the surface of the guide part (150) and the surface of the gas channel (GS2) facing the tube outlet (167b) be between 100° and 140°. If the angle is less than 100°, the incline of the guide part (150) becomes steep, which increases the amount of backflow of the mixed gas. Conversely, if the angle is greater than 140°, the radial length (left-right length based on FIG. 9) of the guide part (150) becomes longer, and the height of the lower gas channel (GS2) adjacent to the upper inner flame holes (142') decreases, making it difficult to smoothly supply the mixed gas to the lower flame holes (162).

[0140] The above guide portion (150) may extend in a direction that narrows the vertical width of the gas channel (GS2) toward the flame holes (142', 162). More precisely, the second guide surface (151) is formed in a direction that narrows the vertical height of the lower gas channel (GS2) toward the upper inner flame holes (142') and the lower flame holes (162, not shown in FIG. 9). Referring to FIG. 9, it can be seen that the height of the path (arrow ② direction) formed by the guide portion (150) is higher than the height of the path (arrow ③) passing through the guide portion (150).

[0141] Referring to Fig. 12, the gas channel (GS2) includes a plurality of paths. More precisely, the lower gas channel (GS2) has a first channel portion (GS2A) connected to the tube outlet (167b). The second channel portion (GS2B) is connected to the first channel portion (GS2A). The second channel portion (GS2B) is formed by the guide portion (150). The third channel portion (GS2C) is connected to the second channel portion (GS2B). The third channel portion (GS2C) is connected to the plurality of flame holes, i.e., the upper inner flame holes (142') and the lower flame holes (162).

[0142] One end of the lower gas channel (GS2) can be connected to the outlet (167b) of the outer tube path (T2) in a first direction. The first channel portion (GS2A) is connected to the outlet (167b) of the outer tube path (T2) in a first direction. The first direction is the up-down direction with reference to FIG. 9, that is, the direction in which the lower burner head (160) and the upper burner head (140) are stacked. The direction of arrow ① in FIG. 9 is the same as the first direction.

[0143] The other end of the lower gas channel (GS2) may be connected in a second direction orthogonal to the first direction toward the lower flame holes (162). The second channel portion (GS2B) is connected in the second direction to the outlet (167b) of the outer tube path (T2). The first direction is the left-right direction with reference to FIG. 9, that is, the radial direction of the lower burner head (160). The direction of arrow ③ in FIG. 9 is the same as the second direction.

[0144] The above guide portion (150) may be positioned between one end and the other end of the lower gas channel (GS2). At this time, the guide portion (150) is formed in a direction inclined with respect to the first direction and the second direction, respectively. The second guide surface (151) of the guide portion (150) extends in a direction inclined with respect to the first direction and the second direction, respectively. This inclined direction may be the guiding direction of the mixed gas.

[0145] Based on the radial direction of the upper burner head (140), the guide part (150) can extend in a direction to widen the vertical height of the upper gas channel (GS1) toward the upper flame holes (142). In other words, the distance (GCL, see FIG. 12) between the first guide surface (151') of the guide part (150) and the upper head wall (141) gradually widens toward the lower end of the guide part (150). In this way, the mixed gas that was flowing at high speed / low pressure between the relatively narrow upper surface of the central heel (144) and the lower surface (183) of the burner cap (180) can flow at low speed / high pressure as it passes the first guide surface (151'). And, as the mixed gas is evenly spread toward the plurality of upper flame holes (142), uniform upper flames (F1) can be generated in all the upper flame holes (142).

[0146] The guide portion (150) may be arranged to face the upper flame holes (142) based on the radial direction of the upper burner head (140). In FIG. 13, the first guide surface (151') of the guide portion (150) is arranged to face the upper flame holes (142) based on the radial direction (see the arrow direction of FIG. 13). In this way, the mixed gas moving along the surface of the upper gas channel (GS1) can flow along the first guide surface (151') - the bottom of the upper gas channel (GS1) and then rise to be supplied to the upper flame holes (142). During this flow process, the mixed gas can be evenly spread.

[0147] Referring to FIGS. 12 and 13, the guide portion (150) has a second guide surface (151) extending in an inclined direction toward the lower flame holes (162). A first guide end (152) having the highest position in the guide portion (150) is formed at one end of the second guide surface (151). A second guide end (153) having the lowest position in the guide portion (150) is formed at the other end of the second guide surface (151). The second guide surface (151) can form a continuous surface between the first guide end (152) and the second guide end (153). The second guide surface (151) can form a continuous curved surface or flat surface between the first guide end (152) and the second guide end (153).

[0148] Based on the radial direction of the lower burner head (160), the first guide section (152) may be arranged closer to the lower flame holes (162) than the outlet (167b) of the outer tube flow path (T2). In other words, based on the radial direction of the lower burner head (160), the edge (167', see FIG. 12) of the outlet (167b) of the outer tube flow path (T2) may be arranged at a position farther from the lower flame holes (162) than the guide section (150).

[0149] Referring to Fig. 13, the position of the first guide section (152) based on the radial direction of the lower burner head (160) is indicated as X3, and the position of the edge (167') of the outlet (167b) of the outer tube flow path (T2) that is relatively closer to the lower flame holes (162) is indicated as X2. As can be seen, the position (X3) of the first guide section (152) is closer to the lower flame holes (162) than the position (X2) of the outlet (167b) of the outer tube flow path (T2). In this way, the second guide surface (151) may not overlap with the outlet (167b) of the outer tube flow path (T2) in the height direction (up-down direction in Fig. 13). If the second guide surface (151) does not overlap with the outlet (167b) of the outer tube flow path (T2), the mixed gas discharged through the outlet (167b) of the outer tube flow path (T2) can be prevented from colliding directly with the second guide surface (151). Accordingly, the second guide surface (151) can faithfully fulfill its role of guiding only the flow of the discharged mixed gas.

[0150] In Fig. 13, the difference (L2-L1) between the diameter (L1) of the outlet (167b) of the outer tube flow path (T2) and the distance (L2) from the edge (167') of the outlet (167b) of the outer tube flow path (T2) to the first guide section (152) is the thickness of the outer mixing tube (167) and, at the same time, the separation distance between the outlet (167b) of the outer tube flow path (T2) and the guide section (150). By securing this separation distance, the mixed gas may not collide with the second guide surface (151) immediately after being discharged through the outlet (167b) of the outer tube flow path (T2).

[0151] The radial distance of the second channel portion (GS2B) based on the radial direction of the lower burner head (160) may be smaller than or equal to the diameter of the outlet (167b) of the outer tube passage (T2). Referring to Fig. 13, the diameter of the outlet (167b) of the outer tube passage (T2) is indicated as L1, and the radial distance of the second channel portion (GS2B) is indicated as L3. Here, L3<=L1. In this way, the supply of the mixed gas through the outlet (167b) of the outer tube passage (T2) is smoothly performed, while at the same time, the radial length of the third channel portion (GS2C) can be prevented from being reduced by the guide portion (150). When the radial length of the third channel portion (GS2C) is secured to a certain level or more, the mixed gas can be uniformly spread into the plurality of lower flame holes (162).

[0152] Based on the direction in which the outlet (167b) of the outer tube flow path (T2) is opened, the edge (167') of the outlet (167b) of the outer tube flow path (T2) can be formed between the upper ends of the plurality of lower flame holes (162) and the lower end of the guide portion (150). Referring to Fig. 14, based on the up-down direction, the height (Y2) of the edge of the outlet (167b) of the outer tube flow path (T2) is arranged between the upper end height of the upper inner flame holes (142') and the height (Y3) of the second guide end (153) of the guide portion (150). In this way, the mixed gas discharged through the outlet (167b) of the outer tube path (T2) can reduce interference with the guide part (150) during the process of flowing to the third channel part (GS2C), and can also be supplied to the upper inner flame holes (142') after passing through the surfaces forming the third channel part (GS2C). In Fig. 14, the difference between the edge height (Y2) of the outlet (167b) of the outer tube path (T2) and the height (Y3) of the second guide end (153) is indicated as H2.

[0153] In the present embodiment, the height (Y2) of the edge (167') of the outlet (167b) of the outer tube channel (T2) based on the direction in which the outlet (167b) of the outer tube channel (T2) is opened is formed between the height (Y3) of the bottom surface (163) of the lower gas channel (GS2) (see Y1 of FIG. 14) and the lower end of the guide portion (150). Through this structure, the mixed gas discharged through the outlet (167b) of the outer tube channel (T2) can have reduced interference with the guide portion (150) in the process of flowing to the third channel portion (GS2C).

[0154] Referring to Fig. 14, the height (H3) of the second channel portion (GS2B) may be higher than the height (H1+H2) of the third channel portion (GS2C) based on the direction in which the outlet (167b) of the outer tube passage (T2) is opened. In Fig. 14, the height of the third channel portion (GS2C) is the sum (H1+H2) of the height (H1) between the bottom surface (163) of the lower gas channel (GS2) and the edge (167') of the outlet (167b) of the outer tube passage (T2) and the height (H2) between the edge (167') of the outlet (167b) of the outer tube passage (T2) and the bottom surface (143') of the upper burner head (140). And, the height (H3) of the second channel portion (GS2B) is the height difference between the bottom surface (143') of the upper burner head (140) and the bottom surface (144') of the central heel (144). Here, H3>=(H1+H2). In this way, the second guide surface (151) of the guide portion (150) can sufficiently secure a vertical height for guiding the mixed gas. For reference, the bottom surface of the lower gas channel (GS2) becomes the top surface (163) of the lower burner head (160).

[0155] FIG. 15 illustrates a second embodiment of a cooking appliance according to the present invention. The same parts as those in the previously described embodiment are given the same reference numerals and descriptions thereof are omitted. As shown in the drawing, the guide portion (150) provided in the lower burner head (160) may have a continuous planar structure from the first guide end (152) to the second guide end (153). At this time, a part of the guide portion (150) may extend to a position facing the outlet (167b) of the outer tube passage (T2). More precisely, the first guide end (152) is arranged to vertically overlap the outlet (167b) of the outer tube passage (T2). Here, the vertical direction refers to the direction in which the outlet (167b) of the outer tube passage (T2) is opened.

[0156] Fig. 16 illustrates a third embodiment of a cooking appliance according to the present invention. The same parts as those in the previously described embodiment are given the same reference numerals and descriptions thereof are omitted. As shown in the drawing, a relative guide part (144'') is formed to be inclined at a position facing the guide part (150) based on the radial direction of the upper burner head (140). The relative guide part (144'') can form the first channel part (GS2A) together with the guide part (150). The relative guide part (144'') is formed in a direction that widens the radial width of the second channel part (GS2B) from the bottom surface (144') of the central heel (144) toward the outlet (167b) of the outer tube path (T2). This relative guide part (144'') can guide the mixed gas discharged through the outlet (167b) of the outer tube euro (T2) to flow in the direction of the second channel part (GS2B).

[0157] Fig. 17 illustrates a fourth embodiment of a cooking appliance according to the present invention. Parts that are the same as those in the previously described embodiment are given the same reference numerals and descriptions thereof are omitted. As shown in the drawing, at least a portion of the second guide surface (151) of the guide portion (150) may be configured as a curved surface between the first guide end (152) and the second guide end (153). The second guide surface (151) at a position adjacent to the first guide end (152) of the guide portion (150) may be configured as a curved surface, and the second guide surface (151) at a position adjacent to the second guide end (153) may be configured as a flat surface.

[0158] Fig. 18 illustrates a fifth embodiment of a cooking appliance according to the present invention. The same parts as those in the previously described embodiment are given the same reference numerals and descriptions thereof are omitted. As shown in the drawing, an outlet slope (167'') is formed at the edge of the outlet (167b) of the outer tube path (T2). The outlet slope (167'') extends in a downwardly inclined direction toward the plurality of lower flame holes (162). The outlet slope (167'') may form the second channel portion (GS2B) together with the second guide surface (151) of the guide portion (150). The outlet slope (167'') may cooperate with the guide portion (150) to guide the mixed gas to the third channel portion (GS2C).

[0159] Meanwhile, although not shown, the burner cap (180) may be omitted. If the burner cap (180) is omitted, the upper burner head (140) may function as the burner cap (180). If the burner cap (180) is omitted, the upper gas channel (GS1) and the upper flame holes (142) may also be omitted. In this case, the lower gas channel (GS2) may be referred to as a gas channel (GS2), the lower flame holes (162) may be referred to as flame holes (162), the outer tube passage (T2) may be referred to as a tube passage (T2), the outer mixing tube (167) may be referred to as a mixing tube (167), the second guide surface (151) may be referred to as a guide surface (151), and the outlet (167b) of the outer tube passage (T2) may be referred to as a tube outlet (167b).

[0160] The above description is merely an illustrative illustration of the technical idea of ​​the present invention, and those skilled in the art will appreciate that various modifications and variations can be made without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate, rather than limit, the technical idea of ​​the present invention, and the scope of the technical idea of ​​the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within a scope equivalent thereto should be interpreted as being included in the scope of the rights of the present invention.

Claims

burner body; A lower burner head laminated on the above burner body; An upper burner head that is laminated to the lower burner head, has a plurality of flame holes formed therein, and forms a gas channel between the upper burner head and the lower burner head; A mixing tube provided in the lower burner head and having a tube outlet open toward the gas channel; and a guide portion disposed between the tube outlet and the flame holes and forming a part of the gas channel; A cooking appliance in which the above guide portion extends in an inclined direction toward the above salt holes. A cooking appliance according to claim 1, wherein the guide portion is continuously formed along the circumferential direction of the lower burner head. A cooking appliance according to claim 1, wherein the guide portion extends in a direction that narrows the vertical width of the gas channel toward the flame holes. A cooking appliance according to claim 1, wherein the edge of the tube outlet is positioned further from the flame holes than the guide portion based on the radial direction of the lower burner head. A cooking appliance according to claim 1, wherein the surface of the guide portion forms an obtuse angle with the surface of the gas channel facing the tube outlet. In claim 1, the guide part A guide surface extending in an inclined direction toward the above-mentioned salt holes; A first guide section formed at one end of the guide surface and having the highest position in the guide section; and A cooking appliance comprising a second guide section formed at the other end of the guide surface and having the lowest position in the guide section. A cooking appliance according to claim 6, wherein the first guide end is positioned closer to the flame holes than the tube outlet in the radial direction of the lower burner head. A cooking appliance according to claim 6, wherein the guide surface forms a continuous curved surface or flat surface between the first guide end and the second guide end. A cooking appliance according to claim 6, wherein the first guide end is positioned above the tube outlet based on the direction in which the tube outlet is opened. In claim 1, the gas channel A first channel portion connected to the above tube outlet; A second channel portion connected to the first channel portion and formed by the guide portion; and A cooking appliance comprising a third channel section connected to the second channel section and connected to the plurality of salt holes. A cooking appliance according to claim 10, wherein the height of the second channel portion is higher than the height of the third channel portion based on the direction in which the tube outlet is opened. A cooking appliance according to claim 10, wherein the radial distance of the second channel portion based on the radial direction of the lower burner head is less than or equal to the diameter of the tube outlet. A cooking appliance according to claim 1, wherein the edge of the tube outlet is formed between the upper end of the plurality of flame holes and the lower end of the guide portion based on the direction in which the tube outlet is opened. A cooking appliance according to claim 1, wherein the edge of the tube outlet is formed between the bottom surface of the gas channel and the lower end of the guide portion based on the direction in which the tube outlet is opened. In claim 1, one end of the gas channel is connected to the tube outlet in the first direction, The other end of the above gas channel is connected in a second direction perpendicular to the first direction toward the above salt holes, The above guide portion is disposed between one end and the other end of the gas channel, A cooking appliance in which the guide portion is formed in a direction inclined with respect to the first direction and the second direction, respectively. A cooking appliance according to claim 1, wherein the angle between the surface of the guide portion and the surface of the gas channel facing the tube outlet is between 100° and 140°. In claim 1, a burner cap is laminated on the upper burner head, A plurality of upper flame holes are formed in the upper burner head, An upper gas channel is formed between the upper burner head and the burner cap, and is partitioned at a different height from the gas channel. A cooking appliance in which the guide portion extends in an inclined direction toward the upper flame holes between the burner cap and the upper burner head. A cooking appliance according to claim 17, wherein the guide portion extends in a direction that widens the vertical height of the upper gas channel toward the upper flame holes based on the radial direction of the upper burner head. A cooking appliance according to claim 17, wherein the guide portion is positioned to face the upper flame holes based on the radial direction of the upper burner head. burner body; A lower burner head laminated on the above burner body; An upper burner head laminated on the lower burner head and having a plurality of flame holes formed therein; and a gas channel formed between the lower burner head and the upper burner head; The above gas channel A first channel portion extending in a first direction in which the lower burner head and the upper burner head are stacked, A second channel portion connected to the first channel portion and extending in a direction inclined with respect to the first direction. A cooking appliance comprising a third channel portion connected to the second channel portion and extending in a second direction perpendicular to the first direction toward the plurality of salt holes.

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