Combustor and cooking utensil

Abstract

According to the combustor and the cooking utensil, the combustor comprises a shell, the shell comprises a first shell body and a second shell body which are arranged in the first direction and connected with each other, the first shell body comprises a first sub-plate and a first half pipe, and the second shell body comprises a second sub-plate and a second half pipe; the first sub-plate and the second sub-plate are in butt joint in the first direction to define a combustion cavity, the first half pipe and the second half pipe are in butt joint in the first direction to form an injection pipe, and the injection pipe communicates with the combustion cavity. Wherein the first sub-plate is provided with a plurality of combustion holes communicated with the combustion cavity, and the first direction is parallel to the height direction of the combustor. Through mutual connection of the first shell and the second shell, one part of the injection pipe and one part of the combustion cavity are integrated on the same shell, the precision requirement of the combustor can be guaranteed, the assembling procedure of splicing the injection pipe and the combustion cavity can be omitted, the manufacturing difficulty and the assembling difficulty of the combustor can be reduced, and the manufacturing cost of the combustor is reduced. And the production and manufacturing speed of the combustor can be increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a burner and a cooking appliance. BACKGROUND

[0002] Taking a gas oven as an example, food to be cooked is placed into a cooking cavity, and high temperature generated by combustion of gas in the burner is used to cook the food in the cooking cavity to achieve cooking. In the related art, the structure of the burner is complex, and it is difficult to assemble, which is not convenient for production and manufacturing. CONTENT OF THE INVENTION

[0003] Therefore, the embodiments of the present application aim to provide a burner and a cooking appliance to reduce the assembly difficulty of the burner.

[0004] To achieve the above-mentioned purpose, the technical solution of the embodiments of the present application is as follows:

[0005] The embodiments of the present application provide a burner, comprising:

[0006] A housing, the housing comprising a first housing and a second housing arranged along a first direction and connected to each other, the first housing comprising a first sub-plate and a first half-pipe, the second housing comprising a second sub-plate and a second half-pipe, the first sub-plate and the second sub-plate being butted along the first direction to enclose a combustion cavity, the first half-pipe and the second half-pipe being butted along the first direction to form an ejector pipe, the ejector pipe being in communication with the combustion cavity;

[0007] The first sub-plate has a plurality of combustion holes in communication with the combustion cavity, and the first direction is parallel to the height direction of the burner.

[0008] In some embodiments, the periphery of the first housing has a first flange, the periphery of the second housing has a second flange, the second flange comprises a first edge portion and a second edge portion connected to each other, the first edge portion and the second edge portion are arranged in a stack along the first direction, and the first flange is sealingly sandwiched between the first edge portion and the second edge portion.

[0009] In some embodiments, the burner comprises a radiation layer structure arranged in a stack on a side of the first sub-plate away from the combustion cavity.

[0010] The periphery of the radiation layer structure has a folded edge, and the folded edge is sealingly sandwiched between the first edge portion and the second edge portion near the first flange.

[0011] In some embodiments, the burner comprises an ignition needle holder and an ignition needle, the ignition needle holder is located on the side of the first sub-plate away from the combustion cavity, the ignition needle is arranged on the ignition needle holder, the ignition needle holder is connected to the part of the first sub-plate which is not covered by the radiation layer structure, and a part of the ignition needle holder is pressed against the top surface of the folded edge.

[0012] In some embodiments, the ignition needle holder is welded to the first sub-plate; and / or, the ignition needle holder is welded to the folded edge.

[0013] In some embodiments, the first shell is a one-piece metal piece; and / or, the second shell is a one-piece metal piece.

[0014] In some embodiments, the ejector pipe has an expansion section and an outlet, the outlet communicates the expansion section and the combustion cavity, and the flow area of the expansion section increases along the gas flow direction.

[0015] In some embodiments, the ejector pipe has a necked section and an ejector port, the necked section connects the ejector port and the expansion section, and the flow area of the necked section decreases along the gas flow direction.

[0016] In some embodiments, the ejector pipe has an ejector port and an outlet, and the flow area of the outlet is 1.2 to 2.5 times of the flow area of the ejector port.

[0017] In some embodiments, a part of the outer surface of the first half pipe extends obliquely in the direction close to the second half pipe in the gas flow direction to form a tangent section, and the tangent section extends to the outer surface of the first sub-plate.

[0018] In some embodiments, the second sub-plate comprises a cavity bottom wall and a cavity side wall, the cavity side wall extends along the edge of the cavity bottom wall, a part of the cavity bottom wall protrudes in the direction close to the first sub-plate to form a boss part, the boss part has a step surface, the step surface faces the ejector pipe and extends in a second direction, and the step surface is used to block part of the gas flow of the outlet of the ejector pipe.

[0019] In some embodiments, the second direction is perpendicular to the height direction of the burner.

[0020] In some embodiments, the periphery of the boss part is spaced apart from the cavity side wall to form a guide ring groove.

[0021] In some embodiments, any part of the cavity bottom wall is spaced apart from the first sub-plate.

[0022] In some embodiments, a part of the boss part protrudes in the direction away from the first sub-plate.

[0023] In some embodiments, in orthographic projection onto a plane perpendicular to the extension direction of the ejector tube, the cavity bottom wall extends obliquely towards the first sub-plate at opposite ends in the second direction to form a first slope, the angle between the first slope and the reference plane being 10° to 25°, wherein the reference plane is perpendicular to the first direction.

[0024] In some embodiments, when projected onto a plane perpendicular to the second direction, a portion of the cavity bottom wall extends obliquely in a direction away from the ejector tube toward the direction closer to the first sub-plate to form a second slope, the second slope having an angle of 15° to 35° with a reference plane perpendicular to the first direction.

[0025] Another aspect of this application provides a cooking appliance, including any of the burners described in the above embodiments.

[0026] The burner and cooking appliance provided in this application embodiment integrate a portion of the ejector tube and a portion of the combustion chamber onto the same housing through the interconnection of the first and second housings. This not only ensures the precision requirements of the burner but also eliminates the assembly process of splicing the ejector tube and the combustion chamber, reducing the manufacturing and assembly difficulty of the burner and improving the production speed. Furthermore, the combustion chamber formed by the first and second sub-plates has a large area, resulting in a wider heat radiation range and ensuring relatively uniform temperature within the cooking chamber, thereby improving the cooking effect of the cooking appliance. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a burner provided in an embodiment of this application;

[0028] Figure 2 for Figure 1 An explosion diagram;

[0029] Figure 3 for Figure 1 A schematic diagram of the shell structure in the middle;

[0030] Figure 4 for Figure 3 Schematic diagram of the cross section at the middle FF;

[0031] Figure 5 for Figure 1 A schematic diagram of the structure that retains the second shell and the radial layered structure;

[0032] Figure 6 for Figure 5 Schematic diagram of the cross section at GG;

[0033] Figure 7 is a structural schematic view of the first shell in Figure 1 ;

[0034] Figure 8 is another perspective schematic view of the first shell in Figure 7 ;

[0035] Figure 9 is yet another perspective schematic view of the first shell in Figure 7 ;

[0036] Figure 10 is a structural schematic view of the second shell in Figure 1 ;

[0037] Figure 11 is another perspective schematic view of the second shell in Figure 10 ;

[0038] Figure 12 is yet another perspective schematic view of the second shell in Figure 10 ;

[0039] Figure 13 is still another perspective schematic view of the second shell in Figure 10 .

[0040] BRIEF DESCRIPTION OF DRAWINGS

[0041] 1, shell; A, combustion chamber; B, ejector pipe; C, reference surface; B1, expansion section; B2, necked section; B3, outlet; B4, ejector port; 11, first shell; 11a, first flange; 111, first sub-plate; 111a, combustion hole; 112, first half-pipe; 112a, tangent section; 12, second shell; 12a, second flange; 12a1, first edge portion; 12a2, second edge portion; 121, second sub-plate; 121a, cavity bottom wall; 121a1, boss portion; 121a2, step surface; 121a3, flow guide ring groove; 121a4, first slope surface; 121a5, second slope surface; 121b, cavity side wall; 122, second half-pipe; 2, radiation layer structure; 2a, folded edge; 3, ignition needle support. DETAILED DESCRIPTION

[0042] The embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0043] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0045] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature and the second feature are in direct contact, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this specification, references to terms such as "some embodiments," "examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] One aspect of this application provides a cooking appliance, including a burner according to any embodiment of this application.

[0048] It should be noted that the specific type of cooking appliance is not limited here. For example, in some embodiments, the cooking appliance can be either a gas oven or a steam oven; in other embodiments, different functions can be integrated into the cooking appliance according to user needs, such as a gas oven integrated stove, to improve ease of use. This application describes the embodiments using a gas oven as an example.

[0049] For example, the cooking appliance includes a housing having a cooking chamber, in which a burner is disposed. It is understood that the burner generates heat by burning a combustible gas, and the heat generated by the burner radiates to the cooking chamber, which is capable of holding food to be cooked, thereby enabling the cooking of the food.

[0050] It should be noted that the specific location of the burner within the cooking cavity is not limited. For example, the burner can be located in the lower half of the cooking cavity to facilitate the heating of food with the heat generated by the burner; the burner can also be located in the upper half of the cooking cavity to reduce the amount of grease dripping from the food during heating onto the burner, thereby reducing the risk of the burner catching fire.

[0051] It should be noted that the upper half of the cooking cavity refers to the part whose dimension along the height direction of the cooking cavity is greater than 1 / 2 of the size of the cooking cavity; the lower half of the cooking cavity refers to the part whose dimension along the height direction of the cooking cavity is less than or equal to 1 / 2 of the size of the cooking cavity.

[0052] Another aspect of this application provides a burner; please refer to... Figure 1 and Figure 2 The burner includes a housing 1, which includes a first housing 11 and a second housing 12 arranged along a first direction and connected to each other. It is understood that the housing 1 is formed by connecting the first housing 11 and the second housing 12, which can save the assembly process of the housing 1 and thus reduce the manufacturing difficulty of the housing 1.

[0053] It should be noted that the specific connection method between the first housing 11 and the second housing 12 is not limited.

[0054] Please refer to Figure 1 and Figure 2The first housing 11 includes a first sub-plate 111 and a first half-tube 112, and the second housing 12 includes a second sub-plate 121 and a second half-tube 122. The first sub-plate 111 and the second sub-plate 121 are joined together along a first direction to form a combustion chamber A. The first half-tube 112 and the second half-tube 122 are joined together along the first direction to form an ejector tube B, which communicates with the combustion chamber A. It is understood that a portion of the ejector tube B and a portion of the combustion chamber A are located on the same housing 1, which eliminates the assembly process of joining the ejector tube B and the combustion chamber A, thus improving the manufacturing speed of the burner. Furthermore, according to the actual needs of the cooking chamber, the areas of the first sub-plate 111 and the second sub-plate 121 can be utilized to ensure that the combustion chamber A formed by them has the largest possible heat radiation area, which is beneficial for uniform temperature distribution within the cooking chamber and improves the cooking effect of the cooking appliance.

[0055] It should be noted that the specific connection method of the first sub-board 111 and the second sub-board 121 is not limited; the specific connection method of the first half-pipe 112 and the second half-pipe 122 is not limited.

[0056] Please refer to Figure 1 and Figure 2 The first subplate 111 has multiple combustion holes 111a that communicate with the combustion chamber A. It is understood that the communication between the ejector tube B and the combustion chamber A can form a channel for gas flow. The combustible gas mixture of fuel gas and air enters the combustion chamber A through the ejector tube B and is ejected and burned through the combustion holes 111a.

[0057] In this application embodiment, "multiple" refers to two or more.

[0058] It should be noted that, in the embodiments of this application, the first direction refers to Figure 2 The arrows shown indicate the following directions: the first direction is parallel to the height of the burner; the second direction refers to... Figure 2 The arrows shown indicate that the second direction is perpendicular to the height direction of the burner.

[0059] In related technologies, the burner is assembled from a shaped ejector tube and a combustion chamber along the extension direction of the ejector tube. To ensure the airtightness of the burner, the manufacturing precision requirements for the ejector tube and combustion chamber are high, making the manufacturing and assembly of the burner quite difficult. In other related technologies, such as tubular burners, a portion of the ejector tube is used as the combustion chamber, resulting in a smaller heat radiation range and uneven temperature distribution within the cooking chamber, which affects the cooking effect of the appliance.

[0060] The burner of this embodiment integrates a portion of the ejector tube B and a portion of the combustion chamber A onto the same housing through the interconnection of the first housing 11 and the second housing 12. This not only ensures the precision requirements of the burner but also eliminates the assembly process of splicing the ejector tube B and the combustion chamber A, reducing the manufacturing and assembly difficulty of the burner and improving the production speed. Furthermore, the combustion chamber A formed by the first sub-plate 111 and the second sub-plate 121 has a large area, resulting in a larger heat radiation range of the burner and ensuring relatively uniform temperature within the cooking chamber, thereby improving the cooking effect of the cooking appliance.

[0061] In some embodiments, the first housing 11 is a one-piece metal component; and / or, the second housing 12 is a one-piece metal component.

[0062] It should be noted that the above technical solutions include the following types: First, the first housing 11 is a one-piece metal part; Second, the second housing 12 is a one-piece metal part; Third, both the first housing 11 and the second housing 12 are one-piece metal parts.

[0063] It is understood that the first housing 11 and / or the second housing 12 are integral metal parts. On the one hand, the metal parts can improve the structural strength of the first housing 11 and / or the second housing 12, thereby improving the overall structural strength of the housing 1, maintaining the shape of the housing 1 during the use of the burner, and improving the service life of the burner. On the other hand, the metal parts have good heat transfer efficiency, which allows the burner to release more heat into the cooking cavity during the combustion process, thereby improving the energy utilization efficiency of the burner.

[0064] In some embodiments, please refer to Figure 3 , Figure 4 , Figure 7 and Figure 10 The first housing 11 has a first flange 11a around its periphery, and the second housing 12 has a second flange 12a around its periphery. The second flange 12a includes a first side portion 12a1 and a second side portion 12a2 that are connected to each other. The first side portion 12a1 and the second side portion 12a2 are stacked along a first direction, and the first flange 11a is sealed between the first side portion 12a1 and the second side portion 12a2. It can be understood that by having the first side portion 12a1 and the second side portion 12a2 clamp the first flange 11a, the connection strength between the first housing 11 and the second housing 12 can be guaranteed, and the connection sealing performance between the first housing 11 and the second housing 12 can be improved, thereby ensuring the airtightness of the burner, reducing the possibility of combustible gas leakage during the use of the burner, and improving the safety of the burner.

[0065] It should be noted that the specific formation method of the first flange 11a is not limited; the specific formation method of the second flange 12a is not limited. For example, the second flange 12a is formed by folding the periphery of the second shell 12 toward the first shell 11. After folding, a part of the periphery forms the first side 12a1, and the other part of the periphery forms the second side 12a2.

[0066] In other embodiments, the first housing 11 is welded to the second housing 12. It is understood that welding can improve the connection strength between the first housing 11 and the second housing 12.

[0067] In some embodiments, please refer to Figure 1 and Figure 2 The burner includes a radiating layered structure 2, which is stacked on the side of the first sub-plate 111 facing away from the combustion chamber A. It is understood that the flame ejected from the combustion hole 111a can scorch the radiating layered structure 2, and the radiating layered structure 2 can generate heat radiation under the scorching of the flame at the combustion hole 111a to heat the food to be cooked.

[0068] For example, the radiating layered structure 2 covers the combustion hole 111a. In this way, the flame at the combustion hole 111a can be fully utilized to heat the radiating layered structure 2, so that the radiating layered structure 2 can generate as much heat radiation as possible, thereby improving the cooking efficiency of the cooking appliance. In addition, the radiating layered structure 2 can also block the airflow at the combustion hole 111a, thereby reducing the possibility of external air flowing into the combustion chamber A through the combustion hole 111a and causing backfire, thus improving the safety of the burner.

[0069] It should be noted that the specific structure of the radial layered structure 2 is not limited.

[0070] It should be noted that the specific connection method between the radial layered structure 2 and the shell 1 is not limited.

[0071] For example, please refer to Figure 5 and Figure 6 The radial layered structure 2 has a folded edge 2a at its periphery. The portion of the folded edge 2a adjacent to the first flange 11a is sealed between the first side portion 12a1 and the second side portion 12a2. It can be understood that by using the first side portion 12a1 and the second side portion 12a2 to hold the folded edge 2a of the radial layered structure 2, the radial layered structure 2 can be stably fixed to the shell 1, so that the radial layered structure 2 can stably generate heat radiation under the heat of the combustion hole 111a.

[0072] In some embodiments, please refer to Figure 1 and Figure 2The burner includes an ignition needle support 3 and an ignition needle. The ignition needle support 3 is located on the side of the first sub-plate 111 opposite to the combustion chamber A, and the ignition needle is mounted on the ignition needle support 3. It is understood that one end of the ignition needle is located at at least one combustion hole 111a. The ignition needle can ignite the combustible gas mixture of combustion gas and air in the combustion chamber A. The ignition needle support 3 provides support for the ignition needle, enabling it to stably ignite the combustible gas in the combustion chamber A.

[0073] In some embodiments, please refer to Figure 1 and Figure 2 The ignition needle bracket 3 is connected to the portion of the first sub-plate 111 not covered by the radial layered structure 2, and a portion of the ignition needle bracket 3 presses against the top surface of the folded edge 2a. It is understood that the portion of the first sub-plate 111 not covered by the radial layered structure 2 is located at the connection between the first sub-plate 111 and the first half-tube 112, and at least part of the folded edge 2a at the connection between the first sub-plate 111 and the first half-tube 112 is at a large distance from the first flange 11a, so that at least part of the folded edge 2a is not clamped by the second flange 12a.

[0074] In other words, while providing stable support for the ignition needle, the ignition needle bracket 3 can also press against the folded edge 2a, thus restraining at least part of the folded edge 2a that is not clamped by the second flange 12a. On the one hand, this reduces the possibility of the folded edge 2a that is not clamped by the second flange 12a peeling off from the first sub-plate 111, thereby improving the stability of the radial layered structure 2. On the other hand, it ensures the airtightness between the radial layered structure 2 and the first sub-plate 111, thereby reducing the possibility of gaps between the radial layered structure 2 and the first sub-plate 111, reducing the possibility of combustible gas leakage, and reducing the possibility of air entering the combustion chamber A and causing backfire.

[0075] In other embodiments, the ignition needle support 3 is welded to the folded edge 2a. This improves the constraint effect of the ignition needle support 3 on the folded edge 2a, which is beneficial to improving the stability of the radial layered structure 2 attached to the first sub-plate 111.

[0076] It should be noted that the specific connection method between the ignition needle bracket 3 and the first sub-board 111 is not limited.

[0077] In some embodiments, the ignition needle bracket 3 is welded to the first sub-plate 111. This improves the connection strength between the ignition needle bracket 3 and the first sub-plate 111, enabling the ignition needle bracket 3 to stably support the ignition needle and stably constrain at least part of the folded edge 2a that is not clamped by the second flange 12a.

[0078] In some embodiments, please refer to Figure 10 and Figure 11The ejector tube B has an expansion section B1 and an outlet B3. The outlet B3 connects the expansion section B1 and the combustion chamber A. The flow area of ​​the expansion section B1 increases along the gas flow direction. It can be understood that the expansion section B1 allows the combustible gas mixture of combustion gas and air in the ejector tube B to enter the combustion chamber A with a larger surface area. This facilitates the filling of different positions within the combustion chamber A with combustible gas, resulting in a more uniform distribution of the combustible gas. This, in turn, ensures better uniformity of the flame ejected from different combustion holes 111a, leading to a more uniform distribution of heat radiation generated during burner operation.

[0079] In some embodiments, please refer to Figure 10 and Figure 11 The ejector tube B has a constricted section B2 and an ejector port B4. The constricted section B2 connects the ejector port B4 and the expansion section B1. The flow area of ​​the constricted section B2 decreases along the gas flow direction. It can be understood that when the combustion gas flowing in from the ejector port B4 passes through the constricted section B2, the flow velocity of the combustion gas increases due to the gradually decreasing flow area. This creates an adsorption effect, drawing air near the ejector port B4 into the ejector tube B to form a mixed combustible gas of combustion gas and air, which helps improve the combustion efficiency of the combustion gas.

[0080] In some embodiments, please refer to Figure 10 and Figure 11 The flow area of ​​outlet B3 is 1.2 to 2.5 times that of injection port B4. For example, it can be 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, or 2.5 times. This ratio of the flow area of ​​outlet B3 to that of injection port B4 is reasonable, ensuring sufficient air and fuel mixture enter the combustion chamber A and that the combustible gas entering combustion chamber A fills different positions within combustion chamber A, thus improving the combustion efficiency of the burner.

[0081] In some embodiments, please refer to Figure 7 , Figure 8 and Figure 9 A portion of the outer surface of the first half-pipe 112 extends obliquely toward the second half-pipe 122 in the direction of airflow to form a sectional section 112a, which extends to the outer surface of the first sub-plate 111. It is understood that when the combustible gas in the ejector tube B flows through the sectional section 112a, the sectional section 112a can guide the airflow to one side of the second half-pipe 122, so that the combustible gas entering the combustion chamber A maintains a certain distance from the first sub-plate 111. This reduces the amount of combustible gas flowing out of the combustion hole 111a near the first half-pipe 112 before the combustion chamber A is fully filled, thus improving the utilization rate of the combustible gas.

[0082] In an embodiment where the ejector tube B has an expansion section B1, the sectional section 112a and the expansion section B1 partially overlap in a plane parallel to the extension direction of the ejector tube B. Along the airflow direction, the sectional section 112a reduces the size of the ejector tube B in the first direction, while the expansion section B1 increases the size of the ejector tube B in the second direction, thereby increasing the flow area of ​​the expansion section B1. Thus, along the airflow direction, the size of the end of the ejector tube B near the combustion chamber A increases in the second direction, allowing the combustible gas flow to better fill different positions of the combustion chamber A in the second direction.

[0083] In some embodiments, please refer to Figure 10 The second sub-plate 121 includes a cavity bottom wall 121a and a cavity side wall 121b, with the side wall 121b extending along the edge of the cavity bottom wall 121a. It is understood that the cavity bottom wall 121a and the cavity side wall 121b enclose a portion of the combustion chamber A. The dimensions of the cavity side wall 121b can increase the depth of the combustion chamber A, allowing it to accommodate more combustible gas and thus improve the combustion efficiency of the burner.

[0084] Please refer to Figure 10 A portion of the bottom wall 121a of the combustion chamber protrudes towards the first sub-plate 111 to form a boss portion 121a1. The boss portion 121a1 has a stepped surface 121a2, which faces the ejector tube B and extends along the second direction. The stepped surface 121a2 is used to block part of the airflow from the outlet B3 of the ejector tube B. It can be understood that the stepped surface 121a2 can guide the combustible gas flowing in from the outlet B3 to both sides of the second direction, so that the combustible gas can better fill different positions of the combustion chamber A, thereby improving the uniformity of the distribution of combustible gas in the combustion chamber A, thereby improving the uniformity of heat radiation of the burner and improving the cooking efficiency of the cooking appliance.

[0085] In some embodiments, please refer to Figure 10 The periphery of the boss portion 121a1 is spaced apart from the cavity sidewall 121b to form a flow guiding annular groove 121a3. It can be understood that the flow guiding annular groove 121a3 can guide the flow of combustible gas so that the combustible gas can better fill different positions of the combustion chamber A, improve the heat radiation uniformity of the burner, and improve the cooking efficiency of the cooking appliance.

[0086] In some embodiments, please refer to Figure 3 and Figure 4 Any part of the bottom wall 121a of the cavity is spaced apart from the first sub-plate 111. In this way, the combustible gas can flow in the space between the bottom wall 121a of the cavity and the first sub-plate 111, so that the combustible gas can flow through various positions in the combustion chamber A, thereby improving the uniformity of the distribution of combustible gas in the combustion chamber A.

[0087] In some embodiments, please refer to Figure 10 The boss portion 121a1 protrudes partially away from the first sub-plate 111. In this way, on the one hand, the internal space of the combustion chamber A can be increased, allowing the combustion chamber A to accommodate more combustible gas and increasing the heat radiation of the burner; on the other hand, the partial protrusion of the boss portion 121 can also improve the structural strength of the second sub-plate 121, reduce the deformation of the second sub-plate 121 during use, and ensure the reliability of the second sub-plate 121.

[0088] In some embodiments, please refer to Figures 10 to 12 Projected onto a plane perpendicular to the extension direction of the ejector tube B, the bottom wall 121a of the cavity extends obliquely towards the first sub-plate 111 at its opposite ends in the second direction, forming a first slope 121a4. The angle D between the first slope 121a4 and the reference plane C is 10° to 25°, i.e., 10° ≤ D ≤ 25°. For example, the angle D can be 10°, 11°, 12°, 13°, 14°, 15°, 16°, 17°, 18°, 19°, 20°, 21°, 22°, 23°, 24°, or 25°. It can be understood that the first slope 121a4 can guide the combustible gas in the combustion chamber A to its opposite ends in the second direction, so that the combustible gas can better fill different positions in the combustion chamber A, ensuring complete combustion of the combustible gas in the combustion chamber A, guaranteeing uniform heat radiation generated by the burner, and improving the cooking effect of the food in the cooking chamber.

[0089] It should be noted that the reference plane C is perpendicular to the first direction.

[0090] In some embodiments, please refer to Figure 10 , Figure 11 and Figure 13 Projected onto a plane perpendicular to the second direction, a portion of the cavity bottom wall 121a extends obliquely in the direction away from the ejector tube B towards the direction closer to the first sub-plate 111, forming a second slope 121a5. The angle E between the second slope 121a5 and the reference plane C is 15° to 35°, i.e., 15° ≤ E ≤ 35°. For example, the angle E can be 15°, 16°, 17°, 18°, 19°, 20°, 22°, 24°, 26°, 28°, 30°, 31°, 32°, 33°, 34°, or 35°. It can be understood that the second slope 121a5 can guide the combustible gas flowing in from the ejector tube B to the side of the combustion chamber A away from the ejector tube B, allowing the combustible gas to better fill different positions in the combustion chamber A, ensuring the uniform distribution of combustible gas within the combustion chamber A, resulting in complete combustion of the combustible gas and improving the energy utilization rate of the burner.

[0091] The various embodiments / implementations provided in this application can be combined with each other without creating contradictions.

[0092] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A burner, characterized in that, include: The housing includes a first housing and a second housing arranged and connected to each other along a first direction. The first housing includes a first sub-plate and a first half-tube. The second housing includes a second sub-plate and a second half-tube. The first sub-plate and the second sub-plate are joined together along the first direction to form a combustion chamber. The first half-tube and the second half-tube are joined together along the first direction to form an ejector tube. The ejector tube communicates with the combustion chamber. The first sub-plate has multiple combustion holes communicating with the combustion chamber, and the first direction is parallel to the height direction of the burner.

2. The burner according to claim 1, characterized in that, The first housing has a first flange on its periphery, and the second housing has a second flange on its periphery. The second flange includes a first side portion and a second side portion that are connected to each other. The first side portion and the second side portion are stacked along the first direction, and the first flange is sealed between the first side portion and the second side portion.

3. The burner according to claim 2, characterized in that, The burner includes a radial layered structure, which is stacked on the side of the first sub-plate opposite to the combustion chamber; The radial layered structure has a folded edge around its periphery, and the portion of the folded edge adjacent to the first flange is sealed between the first side and the second side.

4. The burner according to claim 3, characterized in that, The burner includes an ignition needle bracket and an ignition needle. The ignition needle bracket is located on the side of the first sub-plate away from the combustion chamber. The ignition needle is disposed on the ignition needle bracket. The ignition needle bracket is connected to the part of the first sub-plate not covered by the radial layer structure, and a portion of the ignition needle bracket presses against the top surface of the folded edge.

5. The burner according to claim 4, characterized in that, The ignition needle bracket is welded to the first sub-plate; and / or, the ignition needle bracket is welded to the folded edge.

6. The burner according to claim 1, characterized in that, The first housing is a one-piece metal component; and / or, the second housing is a one-piece metal component.

7. The burner according to claim 1, characterized in that, The ejector tube has an expansion section and an outlet, the outlet connecting the expansion section and the combustion chamber, and the flow area of ​​the expansion section increases along the gas flow direction.

8. The burner according to claim 7, characterized in that, The ejector tube has a constricted section and an ejector port. The constricted section connects the ejector port and the expansion section. The flow area of ​​the constricted section decreases along the gas flow direction.

9. The burner according to claim 1, characterized in that, The ejector tube has an ejector port and an outlet, and the flow area of ​​the outlet is 1.2 to 2.5 times that of the flow area of ​​the ejector port.

10. The burner according to claim 1, characterized in that, A portion of the outer surface of the first half-tube extends obliquely toward the direction of the airflow toward the second half-tube to form a sectional segment, the sectional segment extending to the outer surface of the first sub-plate.

11. The burner according to claim 1, characterized in that, The second sub-plate includes a cavity bottom wall and a cavity side wall. The cavity side wall extends along the edge of the cavity bottom wall. A portion of the cavity bottom wall protrudes towards the direction close to the first sub-plate to form a boss portion. The boss portion has a stepped surface. The stepped surface faces the ejector tube and extends in a second direction. The stepped surface is used to block part of the airflow from the outlet of the ejector tube. The second direction is perpendicular to the height direction of the burner.

12. The burner according to claim 11, characterized in that, The periphery of the boss portion is spaced apart from the cavity sidewall to form a flow guide annular groove.

13. The burner according to claim 11, characterized in that, Any part of the cavity bottom wall is spaced apart from the first sub-plate.

14. The burner according to claim 11, characterized in that, The portion of the boss protrudes in a direction away from the first sub-plate.

15. The burner according to claim 11, characterized in that, In a plane perpendicular to the extension direction of the ejector tube, the bottom wall of the cavity extends obliquely towards the first sub-plate at opposite ends in the second direction to form a first slope, the angle between the first slope and the reference surface is 10° to 25°, wherein the reference surface is perpendicular to the first direction.

16. The burner according to claim 11, characterized in that, In a plane perpendicular to the second direction, a portion of the cavity bottom wall extends obliquely in a direction away from the ejector tube toward the direction closer to the first sub-plate to form a second slope. The angle between the second slope and the reference plane is 15° to 35°, and the reference plane is perpendicular to the first direction.

17. A cooking utensil, characterized in that, The burner includes any one of claims 1 to 16.

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