External fire cover and burner

Abstract

The present invention provides an external fire cover and a burner, which relate to the technical field of cooking equipment, wherein the external fire cover mainly includes a first flow channel and a second flow channel; the second flow channel surrounds the outside of the first flow channel; the second flow channel includes a guide structure connected to the first flow channel, the second flow channel and the external environment. Through the embodiment provided by the present application, after the mixed gas of gas and primary air passes through the input end of the guide structure, a negative pressure is formed, which attracts the secondary air entering the second flow channel from the outside of the external fire cover to flow along the inner wall of the second flow channel close to the guide structure, and is mixed with the mixed gas flowing through the second channel. After the mixed gas is ejected from the output end of the guide structure, it inhales air three times from the outside, that is, realizes three-times mixing of gas and air, provides sufficient air for the gas, is conducive to full combustion of the gas, and improves heating efficiency and user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of cooking equipment, and in particular to an outer fire cover and a burner. Background Art

[0002] A burner is a device that sprays fuel and air in a specific pattern for mixed combustion, and can be used as a cooking appliance. Currently, stove burners on the market typically use circular holes as the flame outlet, arranged along the outer wall of the circular flame cover. This facilitates the replenishment of secondary air, reduces harmful gas emissions, and easily achieves the national standard for Class I energy efficiency. To meet user demands for high efficiency, the flame outlet diameter is often increased to increase heating efficiency. However, to ensure sufficient combustion of the gas, a corresponding amount of air must be added. Summary of the Invention

[0003] In view of the shortcomings of the existing methods, the present application provides an external fire cover and a burner to solve the problem of incomplete gas combustion caused by insufficient air supplementation in the prior art.

[0004] In the first aspect, an embodiment of the present application provides an external fire cover, comprising: a first flow channel; a second flow channel surrounding the outside of the first flow channel; the second flow channel comprising a guide structure connected to the first flow channel, the second flow channel and the external environment; the second flow channel is used to guide the air flowing into the second flow channel to move in a direction close to the guide structure.

[0005] As an optional embodiment, the second flow channel also includes a first side wall and a second side wall arranged correspondingly; the first flow channel and the second flow channel share the first side wall of the second flow channel, and the first side wall is provided with a first through hole connecting the first flow channel and the second flow channel, and the second side wall is provided with a second through hole connecting the second flow channel and the external environment.

[0006] As an optional implementation manner, a plurality of the first through holes and the second through holes are provided in a one-to-one correspondence, and the one-to-one corresponding first through holes and the second through holes are coaxial.

[0007] As an optional embodiment, the outer fire cover also includes: an outer fire cover body, including an inner wall, an outer wall and a top wall, and the inner wall, the outer wall and the top wall are arranged to form a recess; a partition wall is arranged in the recess; wherein the partition wall serves as the first side wall, the outer wall serves as the second side wall, and the first flow channel is formed between the inner wall and the partition wall.

[0008] As an optional implementation manner, the outer fire cover further includes: a flame stabilizing structure, which is arranged on the outer fire cover body and is connected to the first flow channel.

[0009] As an optional implementation manner, the output end of the flame stabilizing structure is arranged between the second through hole and the top wall; the hole axes of the first through hole and the second through hole are both arranged obliquely close to the flame stabilizing structure.

[0010] As an optional implementation manner, the aperture of the second through hole is larger than the aperture of the first through hole.

[0011] In a second aspect, an embodiment of the present application provides a burner, comprising: a base; and an external fire cover according to any one of the aforementioned embodiments, which is arranged on the base.

[0012] As an optional embodiment, the base includes a third flow channel that cooperates with the first flow channel of the outer fire cover, and a fourth flow channel that cooperates with the second flow channel of the outer fire cover, the fourth flow channel surrounds the outside of the third flow channel, and the fourth flow channel has an air inlet on the side away from the outer fire cover; wherein, the first flow channel and the third flow channel are connected to form an air cavity, and the second flow channel and the fourth flow channel are connected to form a channel structure.

[0013] As an optional implementation manner, the burner further includes: a liquid holding member, which is arranged on a side of the base opposite to the outer fire cover and corresponds to the air inlet.

[0014] The present application provides an external fire cover and a burner. The technical solutions provided by the embodiments of the present application bring at least the following beneficial effects:

[0015] After the mixed gas of gas and primary air passes through the input end of the guide structure, negative pressure is formed, which attracts secondary air from the outside of the outer fire cover into the second flow channel, flows along the inner wall of the second flow channel close to the guide structure, and mixes with the mixed gas flowing through the second channel. After the mixed gas is ejected from the output end of the guide structure, it inhales air three times from the outside, that is, three times of mixing of gas and air is achieved, providing sufficient air for the gas, which is conducive to the full combustion of the gas, and improves the heating efficiency and user experience.

[0016] The oil and soup flowing into the second flow channel flow along the inner side of the outer wall of the outer fire cover to the air inlet located below, and flow out of the burner through the air inlet to avoid the burner from stinking and rusting due to the accumulation of oil and soup.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 A schematic diagram of the longitudinal cross-sectional structure of an outer fire cover provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the end face structure of an external fire cover provided in an embodiment of the present application;

[0021] Figure 3 A schematic structural diagram of an external fire cover provided in another embodiment of the present application;

[0022] Figure 4 A schematic structural diagram of a burner provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of the separation of the outer flame cover and the base of a burner provided in an embodiment of the present application;

[0024] Figure 6 A schematic diagram of the end surface structure of a base in a burner provided in an embodiment of the present application;

[0025] Figure 7 A schematic structural diagram of a base in a burner provided in another embodiment of the present application;

[0026] Figure 8 A schematic diagram of a longitudinal cross-sectional structure of a burner provided in an embodiment of the present application;

[0027] Figure 9 A schematic diagram of the longitudinal cross-sectional structure of a burner provided in another embodiment of the present application.

[0028] Reference numerals and corresponding descriptions:

[0029] 1: first flow channel;

[0030] 2: second flow channel; 21: first side wall; 22: second side wall;

[0031] 3: first through hole;

[0032] 4: second through hole;

[0033] 5: External fire cover body;

[0034] 6: flame stabilizing structure; 61: flame stabilizing groove; 62: flame stabilizing hole;

[0035] 7: base; 71: inner fire cover base; 72: outer fire cover base; 73: air guide channel; 74: third flow channel; 75: fourth flow channel; 76: air inlet. DETAILED DESCRIPTION

[0036] The present application is described in detail below. Examples of embodiments of the present application are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. In addition, if the detailed description of the known technology is not necessary for the features of the present application shown, it will be omitted. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0037] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0038] It will be understood by those skilled in the art that, unless expressly stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of this application refers to the presence of the features, elements and / or components, but does not exclude the presence or addition of one or more other features, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" to another element, it may be directly connected to the other element, or there may be intermediate elements. In addition, the "connection" used here may include wireless connection. The term "and / or" used here includes all or any unit and all combinations of one or more associated listed items.

[0039] like Figure 1-3 As shown, an embodiment of the present application provides an external fire cover, which mainly includes a first flow channel 1 and a second flow channel 2; the second flow channel 2 surrounds the outside of the first flow channel 1; the second flow channel 2 includes a guide structure connected to the first flow channel 1, the second flow channel 2 and the external environment; the second flow channel 2 is used to guide the air flowing into the second flow channel 2 to move in a direction close to the guide structure.

[0040] In this embodiment, the outer fire cover is arranged on a horizontal plane. The first flow channel 1 and the second flow channel 2 are both annular structures. The first flow channel 1 is used for the flow of mixed gas and primary air. The input end of the guide structure is connected to the first flow channel 1, and the output end of the guide structure is connected to the external environment. It is used to guide the gas in the first flow channel 1 to flow through the second flow channel 2 and then be ejected to the outside, where it is ignited to form a flame; the output end of the guide structure serves as the fire outlet structure of the outer fire cover.

[0041] The mixed gas of gas and primary air introduced from the burner ejector tube through the nozzle forms a negative pressure after passing through the input end of the guide structure, attracting secondary air from the outside of the outer fire cover to enter the second flow channel 2 and flow along the inner wall of the second flow channel 2 close to the guide structure, and mixes with the mixed gas flowing through the second channel. After the mixed gas is ejected from the output end of the guide structure, it inhales air three times from the outside, that is, three times of mixing of gas and air is achieved, providing sufficient air for the gas, which is conducive to the full combustion of the gas, and improving the heating efficiency and user experience. Figure 1 The dotted arrow in the figure indicates the flow direction of the secondary air.

[0042] like Figure 1-3 As shown, as an optional embodiment, the second flow channel 2 also includes a first side wall 21 and a second side wall 22 arranged correspondingly; the first flow channel 1 and the second flow channel 2 share the first side wall 21 of the second flow channel 2, and the first side wall 21 is provided with a first through hole 3 connecting the first flow channel 1 and the second flow channel 2, and the second side wall 22 is provided with a second through hole 4 connecting the second flow channel 2 and the external environment.

[0043] In this embodiment, the first side wall 21 is the inner wall structure of the second flow channel 2, and the second side wall 22 is the outer wall structure of the second flow channel 2. The first side wall 21 and the second side wall 22 are spaced apart. The first flow channel 1 and the second flow channel 2 are adjacent. The first through hole 3 is the outlet hole for the gas and primary air in the first flow channel 1 to flow to the second flow channel 2. The gas flowing into the second flow channel 2 is ejected to the outside of the outer fire cover through the second through hole 4. The first through hole 3 and the second through hole 4 connected by the second flow channel 2 form a guide structure, the first through hole 3 is the input end of the guide structure, and the second through hole 4 is the output end of the guide structure.

[0044] like Figure 1-3 As shown, as an optional embodiment, a plurality of first through holes 3 and second through holes 4 are provided, and the first through holes 3 and second through holes 4 corresponding to each other are coaxial.

[0045] In this embodiment, a plurality of first through holes 3 are evenly arranged on the first side wall 21, and a plurality of second through holes 4 are evenly arranged on the second side wall 22. The one-to-one corresponding first through holes 3 and second through holes 4 are coaxial to form a plurality of flow guide structures. These plurality of flow guide structures are distributed along the circumference of the second flow channel 2 to ensure the efficiency and quality of the gas and air ejection, form a stable airflow, and thus form a stable circular flame.

[0046] As an optional embodiment, the outer fire cover further includes an outer fire cover body 5 and a partition wall. The outer fire cover body 5 includes an inner wall, an outer wall, and a top wall, which are arranged to form a recess; the partition wall is disposed within the recess; wherein the partition wall serves as a first side wall 21, and the outer wall serves as a second side wall 22, and a first flow channel 1 is formed between the inner wall and the partition wall.

[0047] In this embodiment, the outer fire cover is an annular cover structure. The inner wall and the outer wall are both circular annular walls, and the two are coaxially arranged. The axes of the inner wall and the outer wall extend in the vertical direction, and the outer wall is sleeved on the outside of the inner wall, that is, the diameter of the outer wall is larger than the diameter of the inner wall. The top wall is located above and connected to the top of the inner wall and the outer wall to form a recessed portion with an opening direction downward. The partition wall is also a circular annular wall and is coaxially arranged with the inner wall and the outer wall. The partition wall is arranged between the inner wall and the outer wall along its own radial direction, and the top is connected to the top wall to separate the recessed portion into a first flow channel 1 and a second flow channel 2 with an opening direction downward. In the radial direction of the partition wall, the partition wall is arranged close to the outer wall, and the second flow channel 2 is smaller than the width of the first flow channel 1.

[0048] The first through hole 3 passes through the partition wall to connect the first flow channel 1 and the second flow channel 2 on opposite sides of the partition wall, so that the gas and primary air in the first flow channel 1 flow to the second flow channel 2; the second through hole 4 passes through the outer wall to connect the second flow channel 2 on opposite sides of the outer wall and the external environment, so that the gas and air in the second flow channel 2 flow to the outside.

[0049] like Figure 1-3 As shown, as an optional embodiment, the outer fire cover further includes a flame stabilizing structure 6 , which is arranged on the outer fire cover body 5 and is connected to the first flow channel 1 .

[0050] In this embodiment, the flame stabilization structure 6 includes a flame stabilization groove 61 and a flame stabilization hole 62 connecting the flame stabilization groove 61 and the first flow channel 1. The flame stabilization groove 61 is provided on the outer wall and opens outward, so that the fuel gas and primary air in the first flow channel 1 pass through the flame stabilization hole 62 and the flame stabilization groove 61 to form a stable flame on the outer side of the outer wall.

[0051] like Figure 1-3 As shown, as an optional embodiment, the output end of the flame stabilizing structure 6 is arranged between the second through hole 4 and the top wall; the hole axes of the first through hole 3 and the second through hole 4 are both arranged tilted close to the flame stabilizing structure 6.

[0052] In this embodiment, the flame stabilizing groove 61 of the flame stabilizing structure 6 serves as the output end of the flame stabilizing structure 6. In the vertical direction, the first through hole 3 is lower than the second through hole 4, and the second through hole 4 is lower than the flame stabilizing groove 61 of the flame stabilizing structure 6, so that the flame formed by the ignition of the gas ejected from the guide structure and the stabilized flame formed by the flame stabilizing structure 6 can merge to form an outer ring flame.

[0053] like Figure 1-3 As shown, as an optional embodiment, the aperture of the second through hole 4 is larger than the aperture of the first through hole 3 .

[0054] In this embodiment, the first through hole 3 and the second through hole 4 are both circular holes, and the aperture of the second through hole 4 is larger than that of the first through hole 3. The falling oil and overflowing soup flow into the second flow channel 2 from the second through hole 4, and under the action of gravity, flow along the inner wall of the second flow channel 2 away from the guide structure to avoid clogging the first through hole 3 and the second through hole 4. Even if blocked, they can be cleaned with a needle or other tools. Figure 3 The dotted arrows in the figure indicate the flow direction of the oil and spilled soup.

[0055] like Figure 4-9 As shown, based on the same inventive concept, an embodiment of the present application provides a burner, comprising a base 7 and an outer fire cover of any one of the aforementioned embodiments, wherein the outer fire cover is arranged on the base 7.

[0056] In this embodiment, the base 7 includes a centrally located inner fire cover base 71, an outer fire cover base 72 surrounding the inner fire cover base 71, and an air guide channel 73 connecting the inner fire cover base 71 and the outer fire cover base 72. A gas inlet is provided at the bottom of the inner fire cover base 71 for communicating with a gas source, and the top of the inner fire cover base 71 is connected to the inner fire cover. The air guide channel 73 is provided between the outer fire cover base 72 and the inner fire cover base 71 for allowing the gas source and primary air to flow to the outer fire cover base 72. The top of the outer fire cover base 72 is used to support the outer fire cover.

[0057] like Figure 6 As shown, as an optional embodiment, the base 7 includes a third flow channel 74 that cooperates with the first flow channel 1 of the outer fire cover, and a fourth flow channel 75 that cooperates with the second flow channel 2 of the outer fire cover. The fourth flow channel 75 surrounds the outside of the third flow channel 74, and the side of the fourth flow channel 75 away from the outer fire cover has an air inlet 76; wherein, the first flow channel 1 and the third flow channel 74 are connected to form an air cavity, and the second flow channel 2 and the fourth flow channel 75 are connected to form a channel structure.

[0058] In this embodiment, a third flow channel 74 and a fourth flow channel 75 with an upward opening are provided on the outer fire cover base 72 of the base 7. When the outer fire cover is provided on the base 7, the first flow channel 1 and the third flow channel 74 are connected to form an air cavity; the second flow channel 2 and the fourth flow channel 75 are connected to form a channel structure. The bottom of the fourth flow channel 75 has an air inlet 76 connected to the inside and outside of the channel structure. The air inlet 76 is the inlet of secondary air and the outlet of oil and soup flowing into the second flow channel 2, so as to avoid the problem of stink and rust of the burner caused by the accumulation of oil and soup. Optionally, multiple air inlets 76 are arranged along the circumference. Figure 8 The dotted arrow in the figure indicates the flow direction of the secondary air.

[0059] As an optional embodiment, the burner further includes a liquid holding member (not shown in the figure), which is arranged on the side of the base 7 opposite to the outer fire cover and corresponds to the air inlet 76.

[0060] like Figure 9 In this embodiment, the liquid container is a disc-shaped structure, and the oil and soup flow from top to bottom along the inner wall of the second flow channel 2 and drip into the liquid container through the air inlet 76, making it easy for users to clean them centrally.

[0061] By applying the embodiments of the present application, at least the following beneficial effects can be achieved:

[0062] After the mixed gas of gas and primary air passes through the input end of the guide structure, negative pressure is formed, which attracts secondary air from the outside of the outer fire cover to enter the second flow channel 2 and flow along the inner wall of the second flow channel 2 close to the guide structure, and mixes with the mixed gas flowing through the second channel. After the mixed gas is ejected from the output end of the guide structure, it inhales air three times from the outside, that is, the gas and air are mixed three times, providing sufficient air for the gas, which is conducive to the full combustion of the gas, and improves the heating efficiency and user experience.

[0063] The oil and soup flowing into the second flow channel 2 flow along the inner side of the outer wall of the outer fire cover to the air inlet 76 located below, and flow out of the burner through the air inlet 76 to avoid the burner from stinking and rusting due to the accumulation of oil and soup.

[0064] In the description of this application, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0065] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0066] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0067] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0068] The above description is only part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A burner, characterized in that: include: Base (7), outer fire cover and liquid holding part; The outer fire cover is arranged on the base (7), and the outer fire cover comprises: First flow channel (1); The second flow channel (2) surrounds the outside of the first flow channel (1); the second flow channel (2) includes a flow guide structure connected to the first flow channel (1), the second flow channel (2) and the external environment; the second flow channel (2) is used to guide the air flowing into the second flow channel (2) to move in a direction close to the flow guide structure; The second flow channel (2) further comprises a first side wall (21) and a second side wall (22) arranged correspondingly; The first flow channel (1) and the second flow channel (2) share a first side wall (21) of the second flow channel (2); a first through hole (3) communicating with the first flow channel (1) and the second flow channel (2) is provided on the first side wall (21); a second through hole (4) communicating with the second flow channel (2) and the external environment is provided on the second side wall (22); the first through hole (3) and the second through hole (4) are coaxial to form the flow guide structure; the first through hole (3) is the input end of the flow guide structure, and the second through hole (4) is the output end of the flow guide structure; the aperture of the second through hole (4) is larger than the aperture of the first through hole (3); The base (7) includes a third flow channel (74) matched with the first flow channel (1) of the outer fire cover, and a fourth flow channel (75) matched with the second flow channel (2) of the outer fire cover, the fourth flow channel (75) surrounds the outside of the third flow channel (74), and the fourth flow channel (75) has an air inlet (76) on a side away from the outer fire cover; the first flow channel (1) and the third flow channel (74) are connected to form an air cavity, and the second flow channel (2) and the fourth flow channel (75) are connected to form a channel structure; The liquid holding member is arranged on a side of the base (7) opposite to the outer fire cover, and corresponds to the air inlet (76).

2. The burner according to claim 1, characterized in that A plurality of the first through holes (3) and the second through holes (4) are provided, and the first through holes (3) and the second through holes (4) corresponding to each other are coaxial.

3. The burner according to claim 1 or 2, characterized in that Also includes: The outer fire cover body (5) comprises an inner wall, an outer wall and a top wall, wherein the inner wall, the outer wall and the top wall are arranged to form a recess; a partition wall disposed in the recess; The partition wall serves as the first side wall (21), the outer wall serves as the second side wall (22), and the first flow channel (1) is formed between the inner wall and the partition wall.

4. The burner according to claim 3, characterized in that Also includes: A flame stabilizing structure (6) is provided on the outer fire cover body (5) and is in communication with the first flow channel (1).

5. The burner according to claim 4, characterized in that The output end of the flame stabilizing structure (6) is arranged between the second through hole (4) and the top wall; The hole axes of the first through hole (3) and the second through hole (4) are both arranged tilted close to the flame stabilizing structure (6).

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