Cooking appliance

Abstract

The present invention relates to a cooking appliance. According to the present invention, a plurality of tube through-holes (123, 123') formed in a burner body (110) may include a first tube through-hole (123) and a second tube through-hole (123') having different inner circumferential surface shapes. In addition, a plurality of mixing tubes (133, 133') provided in a burner head (130) may be respectively inserted into the first tube through-hole (123) and the second tube through-hole (123'). The plurality of mixing tubes (133, 133') may include a first mixing tube (133) and a second mixing tube (133') having different outer circumferential surface shapes. Accordingly, when the burner head (130) is assembled in an incorrect orientation, the tube through-holes (123, 123') and the mixing tubes (133, 133'), which have different shapes, interfere with each other, thereby preventing incorrect assembly.

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] Bunsen burners are widely used as gas range-type cooking appliances. Looking at the operation of the Bunsen burner, when gas ejected from the nozzle enters the mixing tube, some of the air required for combustion (called "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 (called "secondary air") is drawn in around the flame, enabling complete combustion.

[0006] The above burner is largely composed of a burner body, a burner head, and a burner head cap. This burner is structured such that a burner head is stacked on top of the burner body, and the burner head cap is stacked on the burner head. A gas channel is formed between the burner head and the burner head cap, allowing combustion to occur.

[0007] At this time, the components that make up the burner may be incorrectly assembled due to user error. For example, the burner head cap may not be properly assembled on the burner head, but may be assembled in the wrong direction. Alternatively, the burner body and the burner head may be incorrectly assembled, resulting in misalignment. In particular, since the components that make up the burner are often circular, it is difficult for the user to determine the correct assembly direction.

[0008] If burner components are improperly assembled, partial gas channels can become open, resulting in incomplete combustion. This can lead to increased levels of harmful gases like carbon monoxide (CO), and in severe cases, even complete flame extinguishment. Furthermore, incomplete combustion can lead to explosions and overheating, compromising burner safety and reducing thermal efficiency.

[0009] At this time, since the burner head cap is positioned at the very top, it is relatively easy for the user to determine whether the burner head cap is incorrectly assembled. In contrast, it is difficult for the user to determine whether there is an incorrect assembly between the burner body and the burner head, which are positioned relatively lower, and thus incorrect assembly can occur more easily.

[0010] Furthermore, even if the burner head and burner body are misassembled at an angle, gas combustion often occurs, albeit incompletely. Consequently, users may continue to use the burner without recognizing the misassembled state, further reducing safety and increasing the risk of fire.

[0011] Meanwhile, burners, as devices that combust gas, require enhanced safety. For example, contact with the flame can lead to injury or fire, so reducing the likelihood of contact between the user and the flame is crucial. While modifying the shape of the grate or installing structures to prevent user access can be effective, these measures actually reduce the burner's operability and efficiency.

[0012] The present invention is intended to solve the problems of the prior art as described above, and an object of the present invention is to prevent misassembly between a burner body and a burner head constituting a burner device.

[0013] Another object of the present invention is to prevent combustion of gas when the burner body and burner head are incorrectly assembled.

[0014] Another object of the present invention is to ensure that when the burner head and the burner body are assembled, the air supply portion for supplying secondary air is directed toward the center of the cooking appliance.

[0015] According to a feature of the present invention for achieving the above-described purpose, the plurality of tube penetration holes formed in the burner body may include a first tube penetration hole and a second tube penetration hole having different inner circumferential shapes.

[0016] In addition, a plurality of mixing tubes provided in the burner head can be inserted into the first tube through-hole and the second tube through-hole, respectively.

[0017] At this time, the plurality of mixing tubes may include a first mixing tube and a second mixing tube having different outer surface shapes.

[0018] Accordingly, when the burner head is coupled in the wrong direction, the tube penetration holes and the mixing tubes having different shapes can be prevented from interfering with each other, thereby preventing misassembly.

[0019] A mounting guide may be protruded from the surface of the first mixing tube. A mounting groove into which the mounting guide is inserted may be sunken into the first tube through hole.

[0020] The above mounting guide may protrude from the outer circumferential surface of the first mixing tube along the radial direction of the first mixing tube. The above mounting groove may be sunken into the inner circumferential surface of the first tube through-hole along the radial direction of the first tube through-hole.

[0021] The sum of the outer diameter of the first mixing tube and the distance by which the mounting guide protrudes radially from the surface of the first mixing tube may be greater than the inner diameter of the second tube through-hole.

[0022] The above mounting guide can extend along the coupling direction of the burner body and the burner head.

[0023] The above mounting guide may extend from the bottom of the first mixing tube along the surface of the first mixing tube.

[0024] The burner head and the burner body may be coupled to each other in a first direction. A mounting guide protruding in a second direction different from the first direction may be provided on the surface of the first mixing tube.

[0025] The above mounting guide may be provided so as to face the surface of the second mixing tube from the surface of the first mixing tube.

[0026] A mounting groove may be sunken into the outer surface of the first mixing tube. A mounting guide inserted into the mounting groove may protrude from the inner surface of the first tube through-hole.

[0027] The burner head may be formed with an air supply portion that supplies air toward the center of the burner head. The flame holes may be omitted in the area where the air supply portion is formed. When the first mixing tube and the second mixing tube are inserted into the first tube through-hole and the second tube through-hole, respectively, the inlet of the air supply portion may be arranged to face an imaginary center line passing through the center of the cooking appliance in the front-back direction.

[0028] The air supply portion may extend radially from an inlet at an edge of the burner head toward the center of the burner head.

[0029] The first tube through-hole and the second tube through-hole may be formed at positions having a 180-degree phase difference with respect to the center of the burner body, respectively. The first mixing tube and the second mixing tube may be formed at positions having a 180-degree phase difference with respect to the center of the burner head, respectively.

[0030] The burner head may be provided with an air supply portion that supplies air toward the center of the burner head. The first mixing tube and the second mixing tube may be positioned opposite each other based on an imaginary center line extending along the air supply portion.

[0031] The burner head may be provided with an air supply portion that supplies air toward the center of the burner head. The burner head may be provided with a discharge hole in which an ignition device for igniting gas is disposed. The mounting groove and the discharge hole may be arranged on opposite sides of an imaginary center line extending along the air supply portion.

[0032] The angle between the virtual extension line passing through the first tube penetration hole and the second tube penetration hole and the virtual extension line passing through the center of the burner body and the discharge hole may be less than 45 degrees.

[0033] An air passage may be formed between the burner head and the burner body in the radial direction of the burner head. The first mixing tube and the second mixing tube may be respectively positioned on opposite sides of the air passage.

[0034] The burner head may be provided with a guide protrusion that protrudes along the direction in which the burner head and the burner body are coupled. When the burner head and the burner body are coupled to each other, an inner chamber may be formed between the burner head and the burner body. The surface of the guide protrusion may be arranged to face the inner circumferential surface of the inner chamber.

[0035] An anti-misassembly member may be provided at the edge of the inner chamber in a direction that narrows the inner diameter of the inner chamber. When the second mixing tube is coupled toward the first tube through-hole, the guide protrusion may interfere with the anti-misassembly member.

[0036] The burner head may include outer flame holes that receive mixed gas from the plurality of mixing tubes, and inner flame holes that receive mixed gas from an inner mixing tube formed at the center of the burner head and surrounded by the outer flame holes. At this time, one of the plurality of mixing tubes and the inner tube may be provided with a first mounting guide and a second mounting guide, respectively.

[0037] The first mounting guide may protrude further toward the lower portion of the burner body than the second mounting guide along the coupling direction of the burner body and the burner head.

[0038] The cooking appliance according to the present invention as discussed above has the following effects.

[0039] In the present invention, the burner body and burner head constituting the burner device are each provided with a plurality of tube penetration holes and mixing tubes and are assembled. At this time, the plurality of tube penetration holes have a first shape and a second shape, and the plurality of mixing tubes also have a first shape and a second shape. Accordingly, when the burner head is assembled in the wrong direction, the tube penetration holes and mixing tubes having different shapes interfere with each other, thereby preventing incorrect assembly. In this way, the stability of the cooking appliance can be enhanced by preventing incorrect assembly of the burner body and burner head.

[0040] In addition, if the burner body and burner head of the present invention are assembled in the wrong direction, the mixing tube may get caught on the edge of the tube penetration hole from the bottom, preventing it from entering the tube penetration hole. Therefore, in case of incorrect assembly, the distance between the burner body and burner head increases, and the distance between the spark plug and the flame holes for gas combustion increases, exceeding the discharge distance. Through this, if the burner body and burner head are incorrectly assembled, gas combustion itself can be blocked, and the stability of the cooking appliance can be further improved.

[0041] Furthermore, according to the present invention, when the burner head and burner body are assembled, the air supply unit for supplying secondary air can be oriented toward the center of the cooking appliance. This allows the air supply unit, without flame holes, to be located toward the center of the cooking appliance, where users more frequently access the appliance, thereby reducing the likelihood of the user's body or clothing coming into contact with flames. Consequently, the safety of the cooking appliance can be enhanced.

[0042] Furthermore, in the present invention, a mounting guide may be protruded from one of the mixing tubes of the burner body, thereby creating a different shape from the other mixing tube. Since this mounting guide is structured to protrude from the outer surface of the mixing tube, it can be applied without significantly altering the structure of existing cooking appliances. Therefore, the cooking appliance of the present invention exhibits the above-described effects while also having the advantages of a simple structure and ease of production.

[0043] Furthermore, since the mounting guide is provided on the mixing tube in the present invention, if incorrectly assembled, the mixing tube may not be fully engaged with the burner body, thereby blocking the supply of fuel gas and primary air. This enables more reliable combustion prevention and enhances the stability of the cooking appliance.

[0044] Furthermore, in the present invention, mixing tubes of different shapes may be arranged on either side of an inner air path for supplying primary air to the inner flame holes. Accordingly, if the mixing tubes are not fully assembled in the case of misassembly, the inner air path may be opened, preventing the supply of primary air. This also prevents combustion in the flame holes.

[0045] Furthermore, in the present invention, either the burner body or the burner head may be provided with a guide protrusion. The guide protrusion may selectively interfere with the mis-assembly prevention part arranged on the opposite side, thereby preventing mis-assembly between the burner body and the burner head. In this way, in the present invention, in addition to the shape differences between the mixing tubes, a mis-assembly structure due to the guide protrusion is also added, thereby further reducing the possibility of mis-assembly between components.

[0046] At this time, the guide protrusion may be provided with different protrusion heights from the mounting guide provided on the mixing tube. Accordingly, the guide protrusion and the mounting guide can sequentially prevent incorrect assembly during the assembly process between parts, and can prevent incorrect assembly at a wider variety of angles and directions.

[0047] Figure 1 is a perspective view showing an example of a cooking appliance according to the present invention.

[0048] Figure 2 is a perspective view showing the structure of an upper plate and a burner constituting one embodiment of the present invention.

[0049] Figure 3 is an enlarged perspective view showing the structure of the upper plate and burner constituting one embodiment of the present invention.

[0050] Fig. 4 is a perspective view showing the structure of a burner constituting one embodiment of the present invention.

[0051] FIG. 5 is a perspective view showing a burner according to an embodiment of the present invention with the inner burner cap and outer burner cap omitted.

[0052] Figure 6 is a perspective view showing the components constituting a burner according to an embodiment of the present invention in an exploded manner.

[0053] Fig. 7 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. 6.

[0054] Fig. 8 is a cross-sectional view taken along line XI-XI' of Fig. 2.

[0055] Fig. 9 is a cross-sectional view taken along line X-X' of Fig. 2.

[0056] Fig. 10 is a cross-sectional view showing the internal structure of a burner, omitting the outer burner cap constituting the burner constituting one embodiment of the present invention.

[0057] Fig. 11 is an enlarged perspective view of a burner and an upper plate, with the inner burner cap and outer burner cap omitted, constituting an embodiment of the present invention.

[0058] Fig. 12 is a plan view showing a burner and an upper plate with the inner burner cap and outer burner cap omitted from the burner constituting one embodiment of the present invention.

[0059] Fig. 13 is a perspective view showing a burner body and burner head constituting one embodiment of the present invention separated.

[0060] Fig. 14 is a perspective view showing an enlarged portion of the circle in Fig. 13.

[0061] Fig. 15 is a cross-sectional view showing a burner body and a burner head constituting one embodiment of the present invention assembled in the correct position.

[0062] Figures 16 and 17 are operation status diagrams sequentially showing the process of changing the direction of a burner head constituting one embodiment of the present invention and being incorrectly assembled into a burner body.

[0063] Fig. 18 is a cross-sectional view showing the state of Fig. 17 in which the burner body and burner head constituting one embodiment of the present invention are incorrectly assembled.

[0064] Fig. 19 is a cross-sectional view showing a burner body and a burner head constituting another embodiment of the present invention being misassembled in a different form from Fig. 17.

[0065] Fig. 20 is a cross-sectional view showing a burner body and a burner head that constitute another embodiment of the present invention in a misassembled state.

[0066] 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 identical reference numbers, even if they appear in the 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.

[0067] 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.

[0068] 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). And, 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).

[0069] The above burner device (100A-100D) is configured to combust a mixed gas, which is a mixture of gas and air, and cook food with the flame generated by the combustion. The burner device (100A-100D) is formed with a plurality of flame holes (142, 152), and can generate a plurality of flames (F1, F2). For reference, the mixed gas hereinafter refers to a mixture of gas and air.

[0070] 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.

[0071] 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).

[0072] The above cooktop unit (20) includes an upper plate (21) 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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).

[0078] 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).

[0079] 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.

[0080] Referring to Fig. 2, the oven section (40, 50) and a portion of the grate (25) are illustrated with the omission. As can be seen, when the grate (25) is removed, the burner caps (180, 190) constituting the burner device (100A) can be exposed. In the present embodiment, the burner device (100A) includes an inner burner cap (180) and an outer burner cap (190) that cover flame holes (142, 152) constituting concentric circles, respectively. This structure will be described again below.

[0081] In FIGS. 2 and 3, the reference numeral K1 represents an imaginary extension line that crosses the center of the cooktop unit (20) in the front-back direction. Here, the center of the cooktop unit (20) means the exact center of the cooktop unit (20) based on the plan view. Therefore, the reference numeral K1 can be regarded as the front-back center line of the cooktop unit (20). Hereinafter, K1 will be referred to as the center line (K1). The arrow K represents the direction in which the air supply unit (165) constituting the burner device (100A) faces the center line (K1). For reference, in the following descriptions and drawings, the arrow K represents the direction in which the air supply unit (165) faces the center line (K1).

[0082] Referring to Fig. 3, the inner burner cap (180) and the outer burner cap (190) are shown separated from the burner device (100A). When the inner burner cap (180) and the outer burner cap (190) are separated from the burner device (100A), the burner body (110) to be described below is exposed. An air supply portion (165) for introducing secondary air may be formed in the burner head (130). The air supply portion (165) may be opened toward the center line (K1).

[0083] The air supply section (165) above is a section where flame holes are omitted, and thus no flame is generated in the air supply section (165). When the air supply section (165) is directed toward the center line (K1), i.e., the center of the cooktop section (20), (i) the air supply section (165) is opened toward the center of the burner device (100A), which is a relatively wide space, so that a smooth supply of secondary air can be enabled, and (ii) since the flame directed toward the center of the cooking appliance, which is easily touched by the user's body or clothes, is omitted, the safety of use can be increased.

[0084] FIG. 4 illustrates a burner device (100A) according to the present embodiment. The burner device (100A) includes a burner body (110), a burner head (130), and burner caps (180, 190). The burner caps (180, 190) include the inner burner cap (180) and the outer burner cap (190). The burner body (110), the burner head (130), and the burner caps (180, 190) 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).

[0085] A portion of the burner device (100A) may be exposed upward through a plate hole (22, see FIG. 6) 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. 4, a portion of the side surface of the inner burner cap (180), the outer burner cap (190), and the burner head (130) may be exposed to the outside through the plate hole (22).

[0086] 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.

[0087] 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, 152) having different diameters, it is necessary to supply gas to the flame holes (142, 152) 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 outer flame holes (152) without inner flame holes (142), either the first nozzle holder part (111) or the second nozzle holder part (113) may be omitted.

[0088] A disc-shaped body plate (120) constituting the burner body (110) is provided on the upper portion of the first nozzle holder portion (111). The body plate (120) may be formed integrally with the first nozzle holder portion (111), 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.

[0089] As described below, the body plate (120) can form an air inlet passage through which primary air is introduced together with the burner head (130). An ignition device (not shown) can be arranged through the body plate (120). The body plate (120) is provided with a tube through-hole (122, 123) through which a mixing tube (131, 133) provided in the burner head (130) passes. The specific structure of the burner body (110) will be described again below.

[0090] The burner head (130) is stacked 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). For reference, in FIG. 5, reference numeral G1 indicates a space spaced between the upper portion of the body plate (120) and the burner head (130).

[0091] In this embodiment, the burner head (130) includes an inner head portion (140) and an outer head portion (150) having different diameters. An inner gas channel (GS1) and an outer gas channel (GS2) through which a mixed gas flows are formed in the inner head portion (140) and the outer head portion (150), respectively. The inner gas channel (GS1) and the outer gas channel (GS2) may have their upper portions shielded by the inner burner cap (180) and the outer burner cap (190), respectively, to form a predetermined space.

[0092] A plurality of flame holes (142, 152) are formed in the burner head (130). Inner flame holes (142) and outer flame holes (152) are formed in the inner head part (140) and the outer head part (150), respectively. The inner flame holes (142) are arranged around the outer side of the inner gas channel (GS1). The outer flame holes (152) are arranged around the outer side of the outer gas channel (GS2). A plurality of flames (F1, F2) are formed in a circular shape in the inner flame holes (142) and the outer flame holes (152), respectively. That is, the flames (F1, F2) generated in the inner flame holes (142) and the outer flame holes (152), respectively, can form two concentric circles. This appearance is illustrated in Fig. 4(B).

[0093] Referring to Fig. 5, the burner head (130) is provided with a protrusion (170). The protrusion (170) may be provided in an outer gas channel (GS2) provided on the inside of the outer head portion (150) of the burner head (130). The protrusion (170) can control the pressure and speed of the gas flowing through the outer gas channel (GS2), thereby evenly providing a mixed gas throughout the entire outer gas channel (GS2) and generating an even flame. The detailed structure of the burner head (130), including the protrusion (170), will be described again below.

[0094] The two burner caps (180, 190) may be stacked on the upper portions of the inner head portion (140) and the outer head portion (150), respectively. Among the burner caps (180, 190), the inner burner cap (180) is stacked on the upper portion of the inner head portion (140) to shield the upper portion of the inner gas channel (GS1). Through this, the mixed gas may be guided toward the inner flame holes (142). Among the burner caps, the outer burner cap (190) is stacked on the upper portion of the outer head portion (150) to shield the upper portion of the outer gas channel (GS2). Through this, the mixed gas may be guided toward the outer flame holes (152).

[0095] Let's take a closer look at the burner device (100A) with reference to FIGS. 6 and 7. In order to help understand the relative positions of the burner device (100A) and the upper plate (21), a portion of the upper plate (21) is also illustrated in FIGS. 6 and 7. As can be seen, the burner body (110) is arranged 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. Burner caps (180, 190) are arranged at the highest portion of the burner device (100A), and a burner head (130) is arranged between the burner caps (180, 190) and the burner body (110).

[0096] For convenience of explanation, let's first look at the burner caps (180, 190). The burner caps (180, 190) cover the open upper portion of the burner head (130) to prevent foreign substances, such as liquid overflowing from a cooking vessel, from flowing into the space inside the burner head (130). In addition, the burner caps (180, 190) may define a portion of the inner gas channel (GS1) and the outer gas channel (GS2).

[0097] Among the above burner caps (180, 190), the inner burner cap (180) is placed on the upper portion of the inner head portion (140). The inner burner cap (180) can cover the upper portion of the inner head wall (141) to be described later. The inner burner cap (180) can shield the upper portion of the inner gas channel (GS1) and guide the mixed gas to the inner flame holes (142).

[0098] The outer burner cap (190) surrounds the inner burner cap (180) and is positioned on the upper portion of the outer head portion (150). The outer burner cap (190) can cover the upper portion of the outer head wall (151) to be described later. The outer burner cap (190) can shield the upper portion of the outer gas channel (GS2) and guide the mixed gas to the outer flame holes (152). Drawing reference numeral 192 indicates a cap penetration portion for exposing the inner burner cap (180).

[0099] 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 inner gas channel (GS1) of the inner head part (140). The first nozzle holder part (111) may have a shape that is elongated in one direction.

[0100] Referring to Fig. 8, a first gas supply path (112) is formed in the first nozzle holder part (111). A first supply path inlet (112a) and a first supply path outlet (112b) 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. 8) 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 that it can face the inner mixing tube (131) to be described below.

[0101] In Fig. 8, 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 G. Referring to this, when looking at the process of supplying the mixed gas to the inner mixing tube (131), 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 (131) through the first supply path outlet (112b). At this time, the inner mixing tube (131) and the first supply path outlet (112b) are spaced apart from each other, and an inner chamber (GC1) is formed in the portion where the inner mixing tube (131) and the first supply path outlet (112b) are spaced apart from each other so as to face each other. An inner air path (AC), described below, is connected to the side of the inner chamber (GC1), through which primary air can be introduced. Accordingly, the gas is mixed with the primary air in the inner chamber (GC1) and then supplied to the inner mixing tube (131).

[0102] Referring again to FIGS. 6 and 7, 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 outer gas channel (GS2) of the outer head part (150). 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 have a shape that extends in a direction orthogonal to the first nozzle holder part (111) from the lower portion of the first nozzle holder part (111).

[0103] Referring to Fig. 9, 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 opened in the left-right direction (based on Fig. 9) so that the second nozzle can be coupled thereto. Unlike the second supply path inlet (114a), the second supply path outlet (114b) is opened in the vertical direction (based on Fig. 9) so that it can face a plurality of outer mixing tubes (133, 133') to be described below. In the present embodiment, since the plurality of outer mixing tubes (133, 133') are configured in two, the number of second supply path outlets (114b) is also correspondingly two.

[0104] In Fig. 9, 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 G. Referring to this, when looking at the process of supplying the mixed gas to the outer mixing tube (133, 133'), 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 (133, 133') through the second supply path outlet (114b). At this time, the outer mixing tube (133, 133') and the second supply path outlet (114b) are spaced apart from each other, and the portion where the outer mixing tube (133, 133') and the second supply path outlet (114b) are spaced apart from each other to face each other is open to the internal installation space of the cooktop unit (20). Accordingly, the primary air is mixed with the gas through the internal installation space of the cooktop unit (20) and then supplied to the outer mixing tube (133, 133').

[0105] Referring again to FIG. 6, the body plate (120) may have a roughly circular shape. The body plate (120) is placed above the first nozzle holder portion (111). In the present embodiment, the second nozzle holder portion (113) is placed below the first nozzle holder portion (111), and the body plate (120) is placed above it. The body plate (120) can assist in mounting the burner head (130) and form a path for supplying primary air between the burner head (130).

[0106] An inner through hole (122) may be formed at the center of the body plate (120). The inner through hole (122) is for connection with the inner mixing tube (131). The first supply path outlet (112b) may be opened at the bottom of the inner through hole (122). (See FIG. 8) Since the inner mixing tube (131) is arranged at the upper portion of the inner through hole (122), the inner mixing tube (131) and the first supply path outlet (112b) are connected through the inner through hole (122). It can be seen that the inner chamber (GC1) is provided inside the inner through hole (122).

[0107] An outer through hole (123, 123') may be formed on the outside of the inner through hole (122) in the body plate (120). The outer through hole (123, 123') is for connection with the outer mixing tube (133, 133'). The outer through holes (123, 123') are configured as a pair, and a part of a pair of outer mixing tubes (133, 133') may be fitted into each of the pair of outer through holes (123, 123'). After passing through the outer through hole (123, 123'), the outer mixing tube (133, 133') faces the second supply path outlet (114b). The above outer through hole (123, 123') can also serve to guide the assembly between the body plate (120) and the burner head (130).

[0108] The above-described plurality of tube penetration holes (123, 123') together with the plurality of outer mixing tubes (133, 133') can also function to prevent incorrect assembly of the burner body (110) and the burner head (130), and this structure will be described in detail below.

[0109] A discharge hole (125) may be formed in the above body plate (120). The discharge hole (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 hole (125) may be arranged on the outside of the inner through hole (122).

[0110] A plate fence (126) may be provided on the upper surface of the body plate (120). The plate fence (126) protrudes in a circular shape from the upper surface of the body plate (120). The plate fence (126) is formed around the edge of the inner through hole (122). The plate fence (126) contacts the lower fence (132) of the burner head (130) and supports the burner head (130).

[0111] The plate fence (126) may be provided with a first inner air passage portion (127). The first inner air passage portion (127) extends from the inner through hole (122) in the radial direction of the body plate (120). The first inner air passage portion (127) protrudes from the plate fence (126) and defines a predetermined path therebetween. The first inner air passage portion (127) comes into contact with the second inner air passage portion (137) of the burner head (130), which will be described later, to form the inner air passage portion (AC) for primary air supply. This appearance is illustrated in FIG. 8. In the present embodiment, the first inner air passage portions (127) are provided symmetrically on both sides with respect to the plate fence (126).

[0112] As another example, either the first nozzle holder part (111) or the second nozzle holder part (113) may be omitted. More precisely, if either the inner head part (140) or the outer head part (150) is omitted, either the first nozzle holder part (111) or the second nozzle holder part (113) may be omitted. As another example, the first nozzle holder part (111), the second nozzle holder part (113), and the body plate (120) may all be configured as separate parts, or at least one of them may be a separate part.

[0113] Next, the burner head (130) will be examined. The burner head (130) may 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 caps (180, 190) and has flame holes (142, 152) to generate a flame by combusting gas.

[0114] The burner head (130) may have a roughly circular shape. In the present embodiment, an inner head portion (140) may be arranged inside the burner head (130) having a circular shape, and an outer head portion (150) may be arranged outside the burner head (130). A portion of the inner head portion (140) and the outer head portion (150) each protrudes upward. The inner burner cap (180) and the outer burner cap (190) may be mounted on the protruding portions to shield the upper portions of the inner gas channel (GS1) and the outer gas channel (GS2).

[0115] The inner head part (140) and the outer head part (150) respectively generate flames (F1, F2) of different diameters. That is, the burner device (100A) of the present embodiment becomes a type of dual burner. Here, the inner head part (140) can minimize the output of the burner device (100A) to enable simmering, and the outer head part (150) can play a role in shortening the boiling time by implementing high output. Of course, the functions of the inner head part (140) and the outer head part (150) are not clearly distinguished from each other. As another example, the burner head (130) may be provided with only the outer head part (150) and the inner head part (140) omitted.

[0116] First, looking at the inner head part (140), an inner mixing tube (131) is provided at the center of the inner head part (140). The inner mixing tube (131) extends vertically, and an inner tube flow path (T1, see FIGS. 8 and 10) is formed inside it. The upper end of the inner mixing tube (131) protrudes upward, and an inner head wall (141) is provided on the outside of the upper end of the inner mixing tube (131). The inner head wall (141) can surround the upper end of the inner mixing tube (131). Accordingly, an inner gas channel (GS1), which is a type of flow path, is formed between the upper end of the inner mixing tube (131) and the inner head wall (141). The inner gas channel (GS1) may be shielded at the top by the bottom surface (183) of the inner burner cap (180). As another example, the inner mixing tube (131) may be configured as a separate object from the burner head (130), or may be provided in the burner body (110).

[0117] Referring to FIGS. 6 and 7, the outlet (131b, FIG. 6) of the inner tube flow path (T1) and the inlet (131a, FIG. 7) of the inner tube flow path (T1) are illustrated. The inner burner cap (180) is arranged above the outlet (131b) of the inner tube flow path (T1), so that the mixed gas discharged through the outlet (131b) of the inner tube flow path (T1) can be guided to the inner gas channel (GS1). The inlet (131a) of the inner tube flow path (T1) can be connected to the inner chamber (GC1) as described above.

[0118] The inner head portion (140) may be provided with an inner head wall (141) that surrounds the inner mixing tube (131). Inner flame holes (142) are arranged on the upper portion of the inner head wall (141). The inner flame holes (142) are arranged to surround the outlet (131b) of the inner tube flow path (T1). Fig. 8 illustrates inner flames (F1) generated when mixed gas is combusted in the inner flame holes (142).

[0119] Referring to Fig. 7, a lower fence (132) may be provided on the bottom surface of the burner head (130). The lower fence (132) is arranged to surround the inlet (131a) of the inner tube path (T1). The lower fence (132) may protrude downward and come into contact with the plate fence (126) of the burner body (110). The lower fence (132) is formed in a circular shape corresponding to the plate fence (126).

[0120] A plurality of outer mixing tubes (133, 133') may be arranged on the outside of the inner mixing tube (131). The plurality of outer mixing tubes (133, 133') have a kind of circular tube shape that protrudes downward. The plurality of outer mixing tubes (133, 133') have an outer tube flow path (T2, see FIG. 9) formed therein. The inner mixing tube (131) is arranged such that the inlet (133a) of the outer tube flow path (T2) is spaced apart from the second supply path outlet (114b). As another example, the plurality of outer mixing tubes (133, 133') may be configured as a separate object from the burner head (130), or may be provided on the burner body (110).

[0121] The above plurality of outer mixing tubes (133, 133') together with the above plurality of tube penetration holes (123, 123') can also have the function of preventing incorrect assembly of the burner body (110) and the burner head (130), and this structure will be described in detail below.

[0122] The outlet (133b) of the outer tube flow path (T2) is opened toward the outer gas channel (GS2) to be described below. The mixed gas discharged through the outlet (133b) of the outer tube flow path (T2) can move along the outer gas channel (GS2). At this time, in the present embodiment, the outlet (133b) of the outer tube flow path (T2) is provided with a protrusion (170). The protrusion (170) reduces the height between the outlet (133b) of the outer tube flow path (T2) and the outer burner cap (190). Accordingly, the pressure of the mixed gas around the outlet (133b) of the outer tube flow path (T2) can be lowered. The outlet (133b) of the outer tube flow path (T2) will be referred to as a tube outlet (133b) hereinafter. This structure will be described again below. For reference, the “height” below is based on the direction in which the outlet (133b) of the outer tube euro (T2) is opened.

[0123] Referring to Fig. 7, a second inner air passage part (137) is provided along the radial direction of the burner head (130) centered on the lower fence (132). The second inner air passage part (137) protrudes from the bottom surface of the burner head (130), and a predetermined path is formed between the second inner air passage parts (137). The second inner air passage part (137) can form the inner air passage (AC) together with the first inner air passage part (127). Drawing reference numerals 134 and 138 represent mounting guides for guiding the mounting direction of the burner head (130).

[0124] The inner head portion (140) and the outer head portion (150) may be connected to each other through a bridge portion (144). The bridge portion (144) connects the inner head wall (141) and the channel fence (160). The bridge portion (144) may extend radially from the surface of the inner head wall (141). A head penetration portion (164), which is an empty space, may be formed between a plurality of the bridge portions (144). The head penetration portion (164) may reduce the overall weight of the burner head (130) and facilitate the flow of air.

[0125] Looking at the outer head part (150), the outer head part (150) may be provided with an outer head wall (151). The outer head wall (151) may be provided in a roughly circular shape along the edge of the burner head (130). The outer head wall (151) may be provided with outer flame holes (152). The outer flame holes (152) are arranged to surround the tube outlet (133b). More precisely, the outer flame holes (152) may surround the outside of the outer gas channel (GS2) to define a portion of the outer gas channel (GS2). FIG. 9 illustrates outer flames (F2) generated when a mixed gas is combusted in the outer flame holes (152).

[0126] A channel fence (160) defining an inner boundary of the outer gas channel (GS2) may be provided on the inside of the outer gas channel (GS2). The channel fence (160) may be spaced apart from the outer head wall (151) to form the outer gas channel (GS2) between the outer head wall (151) and the outer head wall (151). The channel fence (160) may be formed in an approximately circular shape having a smaller diameter than the outer head wall (151).

[0127] As shown in Fig. 6, the burner head (130) may be provided with an air supply unit (165). The air supply unit (165) is for supplying secondary air to the burner head (130). The air supply unit (165) is formed along the radial direction of the burner head (130) from the inner head wall (141). One end of the air supply unit (165) is connected to the inner head wall (141), and the other end is opened toward the outside of the burner head (130). Accordingly, external air (secondary air) from the outside of the burner head (130), more precisely, from the upper portion of the cooktop unit (20), can be supplied to the inner gas channel (GS1) along the air supply unit (165).

[0128] In this embodiment, as described above, the air supply unit (165) faces the center of the cooktop unit (20). Referring to FIGS. 8 and 10, the direction in which the air supply unit (165) faces the center line (K1) is represented by K. In order for the air supply unit (165) to be positioned toward the center of the cooktop unit (20), the mounting guide (134, 138) can accurately set the mounting direction when the burner head (130) is mounted on the burner body (110).

[0129] Looking into more detail, the burner head (130) may be provided with a pair of partition walls (166). The partition walls (166) extend radially between the edge of the burner head (130) and the center of the burner head (130). The air supply unit (165) partitioned from the outer gas channel (GS2) is formed between the pair of partition walls (166). The other end of the pair of partition walls (166) is opened toward the center of the cooktop unit (20).

[0130] Referring to FIGS. 10 and 11, the pair of partition walls (166) cut off a portion of the outer gas channel (GS2). Accordingly, the outer gas channels (GS2) can be formed on each side of the air supply unit (165) with the air supply unit (165) as the center. In the present embodiment, the outer gas channel (GS2) forms a continuous path, excluding the area cut off by the air supply unit (165).

[0131] The pair of partition walls (166) may be formed with transfer holes (166a, 166b). The transfer holes (166a, 166b) are formed along the circumferential direction of the burner head (130). The transfer holes (166a, 166b) can transfer a mixed gas between the disconnected outer gas channels (GS2). In the present embodiment, the transfer holes (166a, 166b) are formed in each of the pair of partition walls (166). Through this, the mixed gas flowing through the outer gas channels (GS2) can pass between the pair of partition walls (166).

[0132] Referring to Fig. 12, the pair of transmission flame holes (166a, 166b) is composed of a first transmission flame hole (166a) and a second transmission flame hole (166b). The first transmission flame hole (166a) and the second transmission flame hole (166b) can transmit the inner flame (F1) of the inner flame holes (142) to the outer flame holes (152). The air supply unit (165) is arranged between the first transmission flame hole (166a) and the second transmission flame hole (166b). In Fig. 12, the direction of arrow ① indicates the direction in which secondary air from the upper portion of the cooktop unit (20) is guided toward the inner gas channel (GS1) along the air supply unit (165).

[0133] Looking at the propagation of flame by the pair of transmission flame holes (166a, 166b) mentioned above, when the spark of the ignition device (ignition plug) is transmitted through the discharge hole (125), combustion of the mixed gas occurs in the inner gas channel (GS1). When the mixed gas is combusted in the inner gas channel (GS1), inner flames (F1) are generated and propagated to the inner flame holes (142). (Arrow ② direction)

[0134] After combustion occurs first in the inner flame holes (142), the inner flames (F1) of the inner flame holes (142) are propagated to the outer gas channel (GS2) through the first transfer flame hole (166a) (arrow ③ direction). Accordingly, combustion may also occur in the outer flame holes (152) to generate outer flames (F2). Referring to Fig. 11, the flame propagated through the first transfer flame hole (166a) may be continuously propagated to a plurality of the outer flame holes (152) in a clockwise direction (arrow ④ direction). Meanwhile, the inner flame (F1) of the inner flame holes (142) is also propagated to the outer gas channel (GS2) through the second transfer flame hole (166b) (arrow ③' direction). The flame propagated through the second transmission flame hole (166b) can be continuously propagated to a plurality of outer flame holes (152) in a counterclockwise direction (direction of arrow ④'). Consequently, the flame can be propagated to the outer flame holes (152) in both directions through the first transmission flame hole (166a) and the second transmission flame hole (166b).

[0135] In the present embodiment, the pair of transmission flame holes (166a, 166b) have different radial distances from the center of the burner head (130). The first transmission flame hole (166a) has a shorter radial distance than the second transmission flame hole (166b) based on the radial direction of the burner head (130). In other words, the distance between the first transmission flame hole (166a) and the inner head wall (141) is shorter than the distance between the second transmission flame hole (166b) and the inner head wall (141).

[0136] In this way, the first transfer flame hole (166a) arranged relatively close to the inner flame holes (142) can play a role in quickly transferring the inner flame (F1) of the inner flame holes (142) to the outer flame holes (152). In addition, the second transfer flame hole (166b) arranged relatively close to the outer flame holes (152) can also play a role in allowing the flames (F2) transferred to the outer flame holes (152) in the clockwise direction to pass across the air supply unit (165) to the outer flame holes (152) on the opposite side.

[0137] Next, a structure that allows the burner body (110) and the burner head (130) constituting the present embodiment to be assembled in the correct position and direction without being incorrectly assembled will be described. Referring to FIG. 13, the burner body (110) and the burner head (130) are shown separated from each other. First, referring to the plurality of tube through-holes (123, 123'), the plurality of tube through-holes (123, 123') include a first tube through-hole (123) and a second tube through-hole (123'). A first outer mixing tube (133) and a second outer mixing tube (133') are inserted into the first tube through-hole (123) and the second tube through-hole (123'), respectively. The first outer mixing tube (133) is inserted into the first tube through-hole (123), and the second outer mixing tube (133') is inserted into the second tube through-hole (123'). Conversely, if the second outer mixing tube (133') is inserted into the first tube through-hole (123), and the first outer mixing tube (133) is inserted into the second tube through-hole (123'), the burner head (130) cannot be assembled to the burner body (110). The following description will focus on this structure.

[0138] For reference, the term "misassembled" below refers to a state in which the second outer mixing tube (133') is inserted into the first tube through-hole (123) and the first outer mixing tube (133) is inserted into the second tube through-hole (123'). The terms "correct position" and "normal direction" refer to a state in which the first outer mixing tube (133) is directed toward the first tube through-hole (123) and the second outer mixing tube (133') is directed toward the second tube through-hole (123').

[0139] The first outer mixing tube (133) and the second outer mixing tube (133') include a first tube through-hole (123) and a second tube through-hole (123') having different inner surface shapes. Here, the inner surface refers to the inner surface of the first tube through-hole (123) and the second tube through-hole (123'). In the present embodiment, the inner surface of the second tube through-hole (123') is circular. In contrast, the inner surface of the first tube through-hole (123) is approximately circular, but does not form a perfect circular shape because a mounting groove (124) is formed. The inner surface shape of the first tube through-hole (123) may be referred to as a first shape, and the inner surface shape of the second tube through-hole (123') may be referred to as a second shape. At this time, the first shape and the second shape are different from each other.

[0140] Referring to Fig. 14, which is an enlarged view of a portion of Fig. 13, the first tube through-hole (123) is illustrated. The first tube through-hole (123) has a cross-section of approximately a circle shape, but one side may be sunken. This sunken portion forms a mounting groove (124). The mounting groove (124) is sunken in the inner circumferential surface of the first tube through-hole (123) along the radial direction of the first tube through-hole (123). In the present embodiment, the mounting groove (124) is sunken in the direction (right based on the drawing) toward the second tube through-hole (123').

[0141] Referring to Fig. 15, the mounting groove (124) can extend in the direction in which the first tube through-hole (123) is opened, that is, in the coupling direction (up and down direction based on the drawing) of the burner body (110) and the burner head (130). When the mounting groove (124) extends in the direction in which the first tube through-hole (123) is opened, the mounting guide (134) described later can slide along the mounting groove (124) in this way. For reference, Fig. 15 illustrates a state in which the mounting guide (134) is fully inserted into the mounting groove (124).

[0142] The above-described mounting groove (124) may also be provided in the extension fence portion (129) connected to the plate fence (126). Referring to FIGS. 13 and 14, the mounting groove (124) is sunken into the extension fence portion (129). At this time, the mounting groove (124) is formed continuously from the inner circumferential surface of the first tube through-hole (123) to the surface of the extension fence portion (129). The mounting groove (124) may extend to the upper end of the extension fence portion (129) and may be opened upwards based on the drawing.

[0143] Referring again to FIG. 13, the second tube through-hole (123') may be formed on the opposite side of the first tube through-hole (123) with respect to the center of the burner body (110). In other words, the second tube through-hole (123') may be formed on the opposite side of the first tube through-hole (123) with respect to the first tube through-hole (122). In the present embodiment, the second tube through-hole (123') is shaped like a circle, unlike the first tube through-hole (123).

[0144] The first tube through-hole (123) and the second tube through-hole (123') may be formed at positions having a phase difference of 180 degrees with respect to the center of the burner body (110), respectively. Referring to FIG. 13, the first tube through-hole (123) and the second tube through-hole (123') are arranged on opposite sides with respect to the first tube through-hole (122), thereby having a phase difference of 180 degrees. In this way, the first tube through-hole (123) and the second tube through-hole (123') may guide the coupling direction of the burner body (110) and the burner head (130) at opposite sides, respectively, and may prevent incorrect assembly.

[0145] The burner body (110) may be provided with a mis-assembly prevention part (128). The mis-assembly prevention part (128) may be provided on the surface of the inner through hole (122). The mis-assembly prevention part (128) may interfere with the guide protrusion (138) to be described below. The mis-assembly prevention part (128) may be provided at the edge of the inner chamber (GC1) and in a direction that narrows the inner diameter of the inner chamber (GC1) at the edge of the inner through hole (122). Due to the mis-assembly prevention part (128), the cross-section of the inner through hole (122) may not be a circle, but may have an asymmetrical shape. Due to this misassembly prevention part (128), when the second outer mixing tube (133') is coupled toward the first tube through hole (123), the guide protrusion (138) interferes with the misassembly prevention part (128).

[0146] Fig. 15 illustrates the lower portion of the inner head wall (141) being positioned on the upper portion of the mis-assembly prevention portion (128). In addition, the guide protrusion (138) is positioned on the opposite side of the mis-assembly prevention portion (128). In this way, when the burner body (110) and the burner head (130) are assembled in the correct positions, the mis-assembly prevention portion (128) and the guide protrusion (138) are positioned with a phase difference of 180 degrees from each other, so that they may not interfere with each other.

[0147] Next, looking at the misassembly prevention structure of the burner head (130), the burner head (130) is provided with a plurality of outer mixing tubes (133, 133'), and the plurality of outer mixing tubes (133, 133') include the first outer mixing tube (133) and the second outer mixing tube (133') which are inserted into the first tube through-hole (123) and the second tube through-hole (123'), respectively. When the first outer mixing tube (133) and the second outer mixing tube (133') are inserted into the first tube through-hole (123) and the second tube through-hole (123'), respectively, the burner head (130) can be coupled to the burner body (110).

[0148] The first outer mixing tube (133) and the second outer mixing tube (133') are approximately cylindrical in shape. The first outer mixing tube (133) and the second outer mixing tube (133') may have a cylindrical shape defining an outer tube flow path (T2) therein. For reference, the outer circumferential surfaces of the first outer mixing tube (133) and the second outer mixing tube (133') refer to the outer surfaces of the first outer mixing tube (133) and the second outer mixing tube (133'). More precisely, the outer circumferential surfaces of the first outer mixing tube (133) and the second outer mixing tube (133') are the surfaces exposed to the outside of the first outer mixing tube (133) and the second outer mixing tube (133'), and conversely, the inner circumferential surfaces of the first outer mixing tube (133) and the second outer mixing tube (133') are the inner surfaces constituting the outer tube flow path (T2).

[0149] At this time, the first outer mixing tube (133) and the second outer mixing tube (133') have different outer surface shapes. Since the first outer mixing tube (133) and the second outer mixing tube (133') have different outer surface shapes, the cross sections of the first outer mixing tube (133) and the second outer mixing tube (133') also have different shapes. In the present embodiment, a mounting guide (134) protrudes from the outer surface of the first outer mixing tube (133), which is different from the shape of the second outer mixing tube (133'). The outer surface shape of the first outer mixing tube (133) may be referred to as the first shape, and the outer surface shape of the second outer mixing tube (133') may be referred to as the second shape. At this time, the first shape corresponds to the inner surface shape of the first tube through hole (123), and the second shape corresponds to the inner surface shape of the second tube through hole (123').

[0150] More specifically, the mounting guide (134) protrudes from the outer surface of the first outer mixing tube (133) along the radial direction of the first outer mixing tube (133). Referring to FIG. 13, it can be seen that the mounting guide (134) protrudes in a direction that increases the outer diameter of the first outer mixing tube (133). The mounting guide (134) guides the coupling direction of the burner body (110) and the burner head (130) when inserted into the mounting groove (124), and prevents the burner body (110) and the burner head (130) from being incorrectly assembled.

[0151] At this time, when the burner head (130) and the burner body (110) are coupled to each other in the first direction, the mounting guide (134) may protrude in a second direction different from the first direction on the surface of the first outer mixing tube (133). In the present embodiment, the mounting guide (134) is provided so as to face the surface of the second outer mixing tube (133') from the surface of the first outer mixing tube (133). As another example, the mounting guide (134) may be provided so as to face the opposite direction from the surface of the second outer mixing tube (133') from the surface of the first outer mixing tube (133), or may be provided along the direction in which the air supply unit (165) extends.

[0152] The above-described mounting guide (134) may have a cross-section of an approximately square shape. This shape may correspond to a shape in which the mounting groove (124) is sunken into the first tube through-hole (123). The mounting guide (134) may be inserted into the mounting groove (124) and may slide along the mounting groove (124). In this process, the coupling direction of the burner body (110) and the burner head (130) may be guided, and when the first outer mixing tube (133) is fitted into the first tube through-hole (123), the burner head (130) may be prevented from rotating relative to the burner body (110).

[0153] The sum of the outer diameter of the first outer mixing tube (133) and the distance by which the mounting guide (134) protrudes radially from the surface of the first outer mixing tube (133) (HR, see FIG. 18) may be formed to be larger than the inner diameter (L1, see FIG. 18) of the second tube through-hole (123'). Referring to FIG. 18, the inner diameter of the first tube through-hole (123) is indicated as L1, and the sum of the outer diameter of the first outer mixing tube (133) and the distance by which the mounting guide (134) protrudes radially from the surface of the first outer mixing tube (133) is indicated as HR. At this time, HR <L1이 되는 것이다. 이에 따라, 기본적으로 상기 제1 아우터 믹싱 튜브(133)는 상기 제1 튜브 관통공(123)에 끼워질 수 없다. 보다 정확하게는, 상기 제1 아우터 믹싱 튜브(133)가 상기 제2 튜브 관통공(123')의 입구에 접근하면, 상기 제1 아우터 믹싱 튜브(133)의 가장자리가 상기 제2 튜브 관통공(123')의 가장자리와 간섭되면서 상기 제1 아우터 믹싱 튜브(133)의 삽입이 제한되는 것이다. 이렇게 되면, 상기 제1 아우터 믹싱 튜브(133)가 상기 제2 튜브 관통공(123')에 삽입되는 오조립이 원천적으로 방지될 수 있다.

[0154] The above mounting guide (134) extends along the coupling direction of the burner body (110) and the burner head (130). Referring to FIG. 13, the mounting guide (134) can extend from the lower end of the first outer mixing tube (133) along the surface of the second outer mixing tube (133'). In this way, from the initial assembly of the burner head (130) and the burner body (110), the mounting guide (134) can accurately set the assembly direction of the burner head (130) and prevent incorrect assembly from the initial assembly. The mounting guide (134) can also extend from the lower end of the first outer mixing tube (133) along the surface of the second outer mixing tube (133') to the upper end of the first outer mixing tube (133).

[0155] Referring to FIG. 3, when the first outer mixing tube (133) and the second outer mixing tube (133') are inserted into the first tube through-hole (123) and the second tube through-hole (123'), respectively, the inlet (165a) of the air supply unit (165) can be arranged to face an imaginary center line (K1) passing through the center of the cooking appliance in the front-back direction. That is, when the first outer mixing tube (133) and the second outer mixing tube (133') are assembled without misassembly, the inlet (165a) of the air supply unit (165) faces the center of the cooking appliance. At this time, since the flame holes (142, 152) are omitted at the inlet (165a) of the air supply unit (165), stability can be increased. More specifically, if the flame holes (142, 152) are omitted from the central part of the cooking appliance where the user accesses the flames more frequently, the possibility of the user's body or clothes coming into contact with the flames (F1, F2) is also reduced.

[0156] Referring again to FIG. 13, an imaginary center line (K2) extending along the air supply unit (165) is illustrated. The center line (K2) is formed in a direction perpendicular to an imaginary extension line (K1) that crosses the center of the cooktop unit (20) in the front-back direction. At this time, in the present embodiment, the first outer mixing tube (133) and the second outer mixing tube (133') are arranged on opposite sides with respect to the imaginary center line (K2). In this way, the first outer mixing tube (133) and the second outer mixing tube (133') can be arranged on both sides, respectively, with the inlet (165a) of the air supply unit (165), which needs to be set to a fixed position, as the center, in order to increase the stability of the cooking appliance. Therefore, the first outer mixing tube (133) and the second outer mixing tube (133') can cooperate with each other to accurately set the direction of the inlet (165a) of the air supply unit (165).

[0157] The first outer mixing tube (133) and the second outer mixing tube (133') may be formed at positions having a 180 degree phase difference with respect to the center of the burner head (130), respectively. As shown in FIG. 13, the first outer mixing tube (133) and the second outer mixing tube (133') have a 180 degree phase difference with respect to the inner mixing tube (131). Accordingly, a virtual extension line (not shown) connecting the first outer mixing tube (133), the inner tube (132), and the second outer mixing tube (133') may be a straight line extending in one direction. Similarly, the first tube through-hole (123) and the second tube through-hole (123') may be formed at positions having a 180 degree phase difference with respect to the center of the burner body (110), respectively.

[0158] Referring to Fig. 13, the mounting groove (124) and the discharge hole (125) may be arranged on opposite sides with respect to an imaginary center line (K2) extending along the air supply unit (165). If the discharge hole (125) and the mounting groove (124) are arranged on opposite sides with respect to the center line (K2), the burner head (130) and the burner body (110) may be incorrectly assembled, and when the burner head (130) is spaced upward from the burner body (110), the discharge distance (H1, see Fig. 17) from the discharge hole (125) to the inner flame holes (142) may increase.

[0159] In the present embodiment, the angle between the virtual extension line passing through the first tube penetration hole (123) and the second tube penetration hole (123') and the virtual extension line passing through the center of the burner body (110) and the discharge hole (125) is formed to be smaller than 45 degrees. In this way, the discharge hole (125) can be arranged close to the second tube penetration hole (123'). If the angle is larger than 45 degrees, when the burner head (130) and the burner body (110) are incorrectly assembled and the burner body (110) is tilted, the inner flame holes (142) of the burner body (110) and the discharge hole (125) may come close, causing incomplete combustion.

[0160] Meanwhile, as described above, an inner air passage (AC, see FIG. 8) is formed in the radial direction of the burner head (130) between the burner head (130) and the burner body (110). Referring to FIG. 13, a first outer mixing tube (133) and a second outer mixing tube (133') are respectively arranged on opposite sides of the second inner air passage portion (137) forming the inner air passage (AC). Accordingly, the first outer mixing tube (133) and the second outer mixing tube (133') can be respectively arranged on both sides centered on the inner air passage (AC). In this case, when the burner head (130) and the burner body (110) are incorrectly assembled and the burner body (110) is tilted, the inner air path (AC) does not form a closed path, so primary air is not supplied smoothly, and as a result, combustion does not occur in the inner flame holes (142). Through this, safety can be further improved in the event of incorrect assembly.

[0161] The burner head (130) may be provided with a guide protrusion (138) that protrudes along the coupling direction of the burner head (130) and the burner body (110). When the burner head (130) and the burner body (110) are incorrectly assembled, the guide protrusion (138) may interfere with the incorrect assembly prevention part (128) of the burner body (110), thereby preventing the burner body (110) and the burner head (130) from being assembled. Of course, the mounting guide (134) of the first outer mixing tube (133) and the second tube through-hole (123') can prevent misassembly in the first place by interfering with each other, but even if the first outer mixing tube (133) is partially inserted into the second tube through-hole (123') in an oblique direction, the guide protrusion (138) can secondarily restrict the insertion of the first outer mixing tube (133) once again.

[0162] The above guide protrusion (138) may protrude from the inside of the lower fence (132) of the burner head (130). In this way, when the burner head (130) and the burner body (110) are assembled with each other, the surface of the guide protrusion (138) may be arranged to face the inner surface of the inner chamber (GC1). This appearance is well illustrated in FIG. 15. Therefore, when the burner head (130) and the burner body (110) are combined, the guide protrusion (138) may also play a role in guiding the assembly while coming into contact with the inner surface of the inner chamber (GC1).

[0163] In this embodiment, the guide protrusion (138) can function to prevent misassembly together with the mounting guide (134). Therefore, the mounting guide (134) may be referred to as the first mounting guide, and the guide protrusion (138) may be referred to as the second mounting guide. That is, one of the plurality of outer mixing tubes (133, 133') and the inner tube (131) are each provided with a first mounting guide (134) and a second mounting guide (138).

[0164] At this time, the first mounting guide (134) may protrude further toward the lower portion of the burner body (110) than the second mounting guide (138) along the coupling direction (up-down direction based on FIG. 15) of the burner body (110) and the burner head (130). Accordingly, the first mounting guide (134) may first interfere with the burner body (110) to prevent misassembly, and the second mounting guide (138) may additionally perform an interference prevention function after preventing interference with the first mounting guide (134).

[0165] Referring to FIGS. 16 and 17, the misassembly process of the burner body (110) and the burner head (130) is shown. First, FIG. 16 shows the burner body (110) being rotated 180 degrees in the forward direction and approaching the burner body (110). That is, in FIG. 16, the first outer mixing tube (133) is facing the second tube through-hole (123'), and the second outer mixing tube (133') is facing the first tube through-hole (123).

[0166] In this state, when the burner body (110) is lowered, the mounting guide (134) of the burner body (110) interferes with the edge of the second tube through-hole (123'). This appearance is illustrated in FIG. 17. Since the distance (HR) obtained by combining the outer diameters of the mounting guide (134) and the first outer mixing tube (133) is larger than the inner diameter (L1) of the second tube through-hole (123'), the first outer mixing tube (133) cannot be inserted into the second tube through-hole (123'). In this state, when the user moves the burner body (110) further downward, the burner body (110) rotates with respect to the lower end of the first outer mixing tube (133), and as a result, the user can easily recognize that the assembly direction of the burner body (110) is incorrect.

[0167] Conversely, the user may first insert the second outer mixing tube (133') into the first tube through-hole (123). In this case, the second outer mixing tube (133') can be inserted to a certain extent into the first tube through-hole (123), but the first outer mixing tube (133) on the opposite side cannot be inserted into the second tube through-hole (123'), and as a result, the assembly of the burner body (110) and the burner head (130) cannot be achieved.

[0168] Although not shown, as another example, a mounting groove (124) may be sunken into the outer surface of the first outer mixing tube (133), and conversely, a mounting guide (134) inserted into the mounting groove (124) may be protruded into the inner surface of the first tube through hole (123).

[0169] As another example, a plurality of mounting guides (134) may be provided on the outer surface of the first outer mixing tube (133). In addition, a plurality of first tube through-holes (123) corresponding to the plurality of mounting guides (134) may be provided in the first tube through-hole (123).

[0170] As another example, the first outer mixing tube (133) and the second outer mixing tube (133') may each be provided with a mounting guide (134). In this case, the mounting guide (134) of the first outer mixing tube (133) and the mounting guide (134) of the second outer mixing tube (133') may be provided at different positions. Accordingly, the mounting guide (134) of the first outer mixing tube (133) is only fitted into the mounting groove (124) of the first tube through-hole (123), and is not fitted into the mounting groove (124) of the second tube through-hole (123').

[0171] FIG. 19 illustrates a state of incorrect assembly of the burner body (110) and the burner head (130) constituting another embodiment of the present invention. As can be seen therein, if the first outer mixing tube (133) is incorrectly assembled into the second tube through-hole (123'), the first outer mixing tube (133) can be inserted to a certain extent into the second tube through-hole (123'). If the outer diameter of the first outer mixing tube (133) and the size of the mounting guide (134) are the same as the inner diameter of the second tube through-hole (123'), the first outer mixing tube (133) can be inserted to a certain extent into the second tube through-hole (123'), and in particular, if the user presses the first outer mixing tube (133) with a large force, the insertion depth may increase. At this time, in case of misassembly, the guide protrusion (138) can contact the misassembly prevention part (128) to limit the assembly distance between the burner head (130) and the burner body (110).

[0172] FIG. 20 illustrates a state of incorrect assembly of the burner body (110) and the burner head (130) constituting another embodiment of the present invention. As can be seen therein, a guide protrusion (128) may be provided on the burner body (110), and an incorrect assembly prevention part (138) may be provided on the burner head (130). Even in this case, in the event of incorrect assembly, the guide protrusion (128) and the incorrect assembly prevention part (138) may interfere with each other, thereby limiting the assembly distance between the burner body (110) and the burner head (130).

[0173] As another example, although not shown, the inner mixing tube (131) may be omitted and only the outer mixing tube (133, 133') may be provided. In this case, the outer mixing tube (133, 133') may also be referred to as a mixing tube (133, 133').

[0174] 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

A burner body having multiple tube penetration holes formed therein; A burner head coupled to the upper part of the burner body and having a plurality of flame holes; and A plurality of mixing tubes protruding along the coupling direction of the burner body and the burner head from the burner head; comprising The plurality of tube through holes above include a first tube through hole and a second tube through hole having different inner circumferential shapes, and A cooking apparatus comprising a plurality of mixing tubes, each inserted into the first tube through hole and the second tube through hole, and a first mixing tube and a second mixing tube having different outer surface shapes. In claim 1, a mounting guide protrudes from the outer surface of the first mixing tube, A cooking appliance in which a mounting groove into which the mounting guide is inserted is recessed on the inner surface of the first tube penetration hole. In claim 1, a mounting guide is protruded along the radial direction of the first mixing tube on the outer surface of the first mixing tube, A cooking appliance in which a mounting groove is sunken into the inner surface of the first tube through-hole along the radial direction of the first tube through-hole. A cooking apparatus according to claim 2, wherein the sum of the outer diameter of the first mixing tube and the distance of the mounting guide protruding radially from the surface of the first mixing tube is larger than the inner diameter of the second tube through hole. A cooking appliance according to claim 2, wherein the mounting guide extends along the joining direction of the burner body and the burner head. In claim 2, the mounting guide extends to the bottom of the first mixing tube, A cooking appliance in which the above mounting guide extends from the lower end of the first mixing tube along the direction in which the burner body and the burner head are joined. In claim 1, the burner head and the burner body are coupled to each other in a first direction, A cooking appliance having a mounting guide protruding in a second direction different from the first direction on the surface of the first mixing tube. In claim 1, a mounting guide protrudes from the outer surface of the first mixing tube, A cooking appliance in which the above mounting guide is provided so as to face the surface of the second mixing tube from the surface of the first mixing tube. In claim 1, a mounting groove is sunken into the outer surface of the first mixing tube, A cooking appliance in which a mounting guide, which is inserted into the mounting groove, protrudes from the inner surface of the first tube penetration hole. In claim 1, the burner head is formed with an air supply unit that supplies air toward the center of the burner head, In the area where the air supply part is formed in the above burner head, the flame holes are omitted, A cooking device in which, when the first mixing tube and the second mixing tube are inserted into the first tube penetration hole and the second tube penetration hole, respectively, the inlet of the air supply unit is positioned to face a virtual centerline passing through the center of the cooking device in the front-rear direction. A cooking device according to claim 10, wherein the air supply unit extends radially along the burner head from an inlet at the edge of the burner head toward the center of the burner head. In claim 1, the first tube through hole and the second tube through hole are each formed at a position having a 180-degree phase difference with respect to the center of the burner body, and A cooking device in which the first mixing tube and the second mixing tube are each formed at a position having a 180-degree phase difference with respect to the center of the burner head. In claim 1, the burner head is formed with an air supply unit that supplies air toward the center of the burner head, The first mixing tube and the second mixing tube are cooking devices positioned on opposite sides of each other with respect to a virtual centerline extending along the air supply section. In claim 1, a mounting guide protrudes from the surface of the first mixing tube, and A mounting groove into which the mounting guide is inserted is recessed in the first tube penetration hole, and An air supply unit is formed in the burner head to supply air toward the center of the burner head, and A discharge hole is formed in the burner head above, in which an ignition device for igniting gas is disposed. A cooking device in which the above-mentioned mounting groove and the above-mentioned discharge hole are positioned on opposite sides of each other based on a virtual centerline extended along the air supply section. In claim 1, a discharge hole is formed in the burner head in which an ignition device for igniting gas is disposed, and A cooking device in which the angle between the imaginary extension line passing through the first tube penetration hole and the second tube penetration hole, and the imaginary extension line passing through the center of the burner body and the discharge hole is less than 45 degrees. In claim 1, an air passage is formed between the burner head and the burner body in the radial direction of the burner head, and The first mixing tube and the second mixing tube are cooking devices respectively positioned on opposite sides of the air passage. In claim 1, the burner head is provided with a guide projection that protrudes along the coupling direction of the burner head and the burner body, and When the burner head and the burner body are combined with each other, an inner chamber is formed between the burner head and the burner body. A cooking device in which the surface of the above guide protrusion is positioned to face the inner circumferential surface of the above inner chamber. In claim 17, an anti-misassembly portion is provided at the edge of the inner chamber in a direction that narrows the inner diameter of the inner chamber, and A cooking device in which, when the second mixing tube is coupled toward the first tube through hole, the guide protrusion interferes with the misassembly prevention part. In claim 1, the burner head Outer flame holes receiving mixed gas from the plurality of mixing tubes above; and Inner flame holes surrounded by the outer flame holes and supplied with mixed gas from an inner mixing tube formed in the center of the burner head; included, A cooking device having a first mounting guide and a second mounting guide, respectively, provided on one of the plurality of mixing tubes and the inner tube. Burner body; A burner head coupled to the upper part of the burner body and having a plurality of flame holes; A first tube through hole formed in the burner body and having an inner surface of a first shape; A second tube through hole formed in the burner body spaced apart from the first tube through hole and having an inner surface of a second shape; and A first mixing tube protruding from the burner head and inserted into the first tube through hole, having an outer surface of the first shape; A second mixing tube protruding from the burner head spaced apart from the first mixing tube and inserted into the second tube through hole, and having an outer surface of the second shape; The first shape and the second shape are different cooking appliances.

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