CN219453944U

CN219453944U - Improved burner structure and gas oven

Info

Publication number: CN219453944U
Application number: CN202320049910.3U
Authority: CN
Inventors: 康振祥; 黄福根; 黄志英; 吴杜红
Original assignee: Guangdong Kangye Electrical Appliance Co ltd
Current assignee: Guangdong Kangye Electrical Appliance Co ltd
Priority date: 2023-01-04
Filing date: 2023-01-04
Publication date: 2023-08-01
Anticipated expiration: 2033-01-04

Abstract

The utility model discloses an improved burner structure and a gas oven, comprising: an injection pipe and a gas diffusion pipe; the injection pipe and the gas diffusion pipe are provided with hollow cavities; the air inlet end of the injection pipe corresponds to the gas nozzle, and the air outlet end of the injection pipe is communicated with the gas diffusion pipe; the air inlet end is provided with an air inlet groove; the ejector tube is formed with a Venturi structure through a stamping process; the venturi structure is sequentially provided with a contraction section, a throat knot and an expansion section along the direction from the air inlet end to the air outlet end; the contraction section is provided with a secondary air-filling hole. According to the utility model, the mixed gas flow of the fuel gas and the air is gradually accelerated in the contraction section, and the secondary air supplementing holes are formed in the contraction section, so that secondary air can be absorbed along with the accelerated gas flow, the air supplementing amount in the combustor is further increased, the full degree of combustion is improved, and the carbon monoxide emission rate is reduced.

Description

Improved burner structure and gas oven

Technical Field

The utility model relates to the technical field of gas oven equipment, in particular to an improved burner structure and a gas oven.

Background

Gas ovens are appliances used to cook food, such as barbecue ovens, pizza ovens, and the like; it has a special baking chamber and a burner in the baking chamber, which is connected to air source and sends out the gas from the burning hole for burning. Such as the gas pizza oven disclosed in patent number CN 202121850621.0.

Referring to fig. 1, the burner of the existing gas oven generally comprises an injection pipe section and a gas diffusion pipe section, the injection pipe section is formed into a venturi pipe structure through a stamping process, and is limited in arrangement space, the span of the junction between the end face of the air inlet end of the existing injection pipe and the venturi pipe is generally about 45mm, the mixing stroke of gas and air is shorter, and the arrangeable space of an air inlet groove is also insufficient; in addition, in the existing burner, the gas holes are arranged in one row or in a plurality of rows and columns at equal intervals, the gas holes in the plurality of rows are mutually overlapped in the vertical direction, and the combustion coverage of the gas is poor. The above structure causes poor combustion sufficiency of fuel, and is generally characterized in that the flame at the burner flame holes appears as unstable yellow flame, and the PPM emission value of carbon monoxide is more than 80. Thus, there is still room for improvement in existing burner configurations.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides an improved burner structure and a gas oven.

The technical scheme adopted by the embodiment of the utility model for solving the technical problems is as follows: an improved burner structure comprising: an injection pipe and a gas diffusion pipe;

the injection pipe and the gas diffusion pipe are provided with hollow cavities; the air inlet end of the injection pipe corresponds to the gas nozzle, and the air outlet end of the injection pipe is communicated with the gas diffusion pipe; the gas diffusion pipe is provided with a plurality of combustion holes, and the tail end of the gas diffusion pipe is sealed; the air inlet end is provided with an air inlet groove;

the injection pipe is provided with a Venturi structure through a stamping process; the venturi structure is sequentially provided with a contraction section, a throat knot and an expansion section along the direction from the air inlet end to the air outlet end; the contraction section is provided with a secondary air supplementing hole.

Optionally, the gas diffusion pipe is provided with a gas inlet, and the gas inlet is connected with the gas outlet end of the injection pipe; the gas inlet is provided with a splitter plate, and the splitter plate is provided with a splitter hole; the splitter plate and the gas inlet are provided with a spacing space.

Optionally, the combustion hole is positioned on the upper side of the gas diffusion pipe; the flow dividing plates are obliquely arranged, the flow dividing holes can be obliquely upward, and the fuel gas is sent out towards the direction of the combustion holes.

Optionally, the ejector tube section is provided with a flow dividing column, and the flow dividing column is arranged in the middle of the ejector tube.

Optionally, the shunt column is a bolt locking piece detachably mounted on the injection pipe.

Optionally, the plurality of combustion holes are divided into a plurality of rows of groups; the combustion holes of the same row group are distributed on the same height horizontal plane at intervals; the combustion holes of two adjacent rows are distributed in a mutually-inserted way.

Optionally, the throat and the end face of the air inlet end have a span in the range 75 to 85 mm.

Optionally, the secondary air-filling holes are arranged at intervals.

The utility model has the beneficial effects that: the ejector tube is provided with a Venturi structure through a stamping process, and the Venturi structure is sequentially provided with a contraction section, a throat knot and an expansion section along the direction from the air inlet end to the air outlet end; through the span of extension laryngeal knot and inlet end for the stroke extension of gas and air mixing, gas and air mixing are initially tend to stable after, send into venturi structure again. The mixed gas flow of the fuel gas and the air can be gradually accelerated in the contraction section, and the secondary air supplementing holes are formed in the contraction section, so that secondary air can be absorbed along with the accelerated gas flow, the air supplementing quantity in the combustor is further increased, the full degree of combustion is improved, and the carbon monoxide emission rate is reduced.

The utility model also provides another technical scheme: a gas oven comprising the improved burner arrangement described above.

Optionally, the gas oven includes a base housing; the base shell is provided with a plurality of air supply grooves; the air supply groove is arranged close to the injection pipe; the secondary air-filling hole is formed in one side, away from the air-feeding groove, of the injection pipe.

In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic structural view of a prior art burner structure;

FIG. 2 is a schematic view of a burner structure according to one embodiment of the present utility model;

FIG. 3 is an isometric cross-sectional view of the improved burner configuration of FIG. 2;

FIG. 4 is a cross-sectional view of the improved burner configuration of FIG. 2;

fig. 5 is a schematic view of a gas oven according to one embodiment of the present utility model.

Description of main reference numerals:

10. an ejector tube; 11. an air inlet end; 12. an air outlet end; 13. an air inlet groove; 14. a secondary air supplementing hole; 20. a gas diffusion tube; 21. a combustion hole; 22. a gas inlet; 30. a venturi structure; 31. a constriction section; 32. a laryngeal knot; 33. an expansion section; 40. a diverter blade; 41. a diversion aperture; 50. a split column; 60. a base shell; 61. and (5) an air supply groove.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

In the description of the present utility model, plural means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and the above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless clearly defined otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly and may be connected directly or indirectly through an intermediary; the connecting device can be fixedly connected, detachably connected and integrally formed; may be a mechanical connection; may be a communication between two elements or an interaction between two elements. The specific meaning of the words in the utility model can be reasonably determined by a person skilled in the art in combination with the specific content of the technical solution.

Examples

Referring to fig. 2 to 5, an improved burner structure according to the present utility model comprises: an ejector pipe 10 and a gas diffusion pipe 20;

the injection pipe 10 and the gas diffusion pipe 20 are provided with hollow chambers; the air inlet end 11 of the injection pipe 10 corresponds to the gas nozzle, and the air outlet end 12 is communicated with the gas diffusion pipe 20; the gas diffusion tube 20 is provided with a plurality of combustion holes 21, and the tail ends of the gas diffusion tube are sealed; the air inlet end 11 is provided with an air inlet groove 13;

the ejector 10 is formed with a venturi structure 30 by a stamping process; the venturi structure 30 is provided with a contraction section 31, a throat knot 32 and an expansion section 33 in sequence along the direction from the air inlet end 11 to the air outlet end 12; the contraction section 31 is provided with a secondary air supply hole 14.

In the utility model, the ejector pipe 10 is provided with a Venturi structure 30 through a stamping process, and the Venturi structure 30 is sequentially provided with a contraction section 31, a throat knot 32 and an expansion section 33 along the direction from the air inlet end 11 to the air outlet end 12; by extending the span between the throat 32 and the air inlet end 11, the mixing stroke of the fuel gas and the air is extended, and the fuel gas and the air are initially stabilized and then fed into the venturi structure. The mixed gas flow of the fuel gas and the air is gradually accelerated in the contraction section 31, and the secondary air supplementing holes 14 are formed in the contraction section 31, so that secondary air can be absorbed along with the accelerated gas flow, the air supplementing amount in the combustor is further increased, the full degree of combustion is improved, and the carbon monoxide emission rate is reduced.

In the present embodiment, the gas diffusion tube 20 is provided with a gas inlet 22, and the gas inlet 22 is connected with the gas outlet end 12 of the injection tube 10; the gas inlet 22 is provided with a splitter vane 40, and the splitter vane 40 is provided with a splitter orifice 41; the splitter vane 40 is provided with a space from the gas inlet 22. When the fuel gas is ejected and diffused from the ejector pipe 10 to the fuel gas diffusion pipe 20, the fuel gas cannot be directly ejected to the combustion holes 21 near the fuel gas inlet 22 due to the blocking of the splitter 40, but most of the air flow of the fuel gas diffuses to two sides in the space, and the local fuel gas flows to the other side of the splitter 40 from the splitter hole 41, so that the fuel gas is supplied to the combustion holes 21 near the fuel gas inlet 22; the arrangement structure ensures that the gas flow of the gas in the gas diffusion pipe 20 can be mostly diffused towards the two sides of the gas diffusion pipe 20, but not accumulated on the combustion holes 21 at the position of the gas inlet 22, so that the gas is uniformly supplied at the positions of the burner close to the injection pipe 10 and far from the injection pipe 10, and the gas combustion in each area of the burner is more uniform; moreover, under the blocking of the splitter 40, the gas flow can collide to form disturbance, so that the fuel and the air are mixed more fully, the mixing degree of the gas is improved, and the gas combustion is ensured to be full.

Specifically, the combustion holes 21 are located at the upper side of the gas diffusion pipe 20, which is disposed in the baking chamber of the gas oven, and the combustion holes 21 are provided at the upper side of the gas diffusion pipe 20 in order to prevent the gas from being directly sprayed to the objects or food to be baked.

Further, the flow dividing plate 40 is inclined, and the flow dividing hole 41 may be inclined upward to deliver the fuel gas toward the combustion hole 21. The flow dividing plate 40 is obliquely arranged, so that the fuel gas flowing out of the flow dividing hole 41 can be aligned with the combustion hole 21, and the fuel gas can smoothly pass through the flow dividing hole 41 and flow out of the aligned fuel gas holes, so that the fuel gas combustion is smoother and more stable.

In this embodiment, the ejector 10 is provided with a split-flow column 50, and the split-flow column 50 is disposed in the middle of the ejector 10. The flow dividing column 50 is arranged in the middle of the injection pipe 10, so that the gas flow in the injection pipe 10 can be dispersed into two flows towards the two sides of the flow dividing column 50, and after the two flows strike the flow dividing plate, the two flows can just face the left side and the right side and spread towards the two ends of the gas diffusion pipe 20, and the gas flows in the injection pipe 10 and the gas diffusion pipe 20 more smoothly and uniformly.

Specifically, the plurality of the split columns 50 may be disposed at intervals along the flow direction of the gas flow. For example, a splitter post 50 may be provided at the throat, and a splitter post 50 may be provided at the outlet end 12 of the eductor 10.

In this embodiment, the diverter post 50 is a bolt lock that is removably mounted to the injector tube 10. Screw holes are processed on the side wall of the injection pipe 10, and the bolt locking piece can be fixed on the injection pipe 10, so that the injection pipe is used as a diversion column 50. The processing and manufacturing process is simple and the feasibility is high.

In the present embodiment, the plurality of combustion holes 21 are divided into a plurality of rows of groups; the combustion holes 21 of the same row group are distributed at intervals on the same height horizontal plane; the combustion holes 21 of two adjacent rows are distributed in a mutually-inserted way. Through inserting the blank setting with the combustion hole 21 of a plurality of row group, can stagger the combustion coverage space of two rows of combustion holes 21 in vertical direction, the combustion coverage area of gas increases, and gas combustion distributes more rationally, and when gas sent out the combustor from the combustion hole 21, more abundant combustion space can be obtained, and gas combustion is more abundant.

In this embodiment, by extending the length of the air inlet end 11 of the ejector pipe 10, the mixing stroke of the fuel gas and air can be extended, and the fuel gas and air are initially mixed and tend to be stable and then sent into the venturi structure 30; further, after the extension of the intake end 11, the length of the air intake groove 13 may be increased to increase the amount of primary air intake. Compared with the conventional injection pipe 10, the span between the end face of the air inlet end 11 and the throat knot 32 of the venturi tube is generally about 45mm, and through experiments and tests, in this embodiment, the span between the throat knot 32 and the end face of the air inlet end 11 is between 75 and 85mm, so that the mixing effect of fuel gas and air is better.

In some embodiments, the secondary air supply holes 14 are spaced apart by a plurality of holes. The plurality of air supplementing holes are circumferentially spaced without the contraction section 31, so that the air inflow of secondary air supplementing can be improved.

After the improved structure is adopted, the PPM emission value of the carbon monoxide is only in the range of 20 to 30, and compared with the PPM emission value of the carbon monoxide of the existing burner, the PPM emission value of the carbon monoxide of the existing burner is more than 80, and the emission rate of the carbon monoxide is obviously reduced. In addition, in the combustion process, the flame at the position of the combustion hole 21 of the burner of the embodiment presents a relatively stable blue flame, and the burner continuously burns stably.

Referring to fig. 5, the present utility model further provides another technical solution: a gas oven comprising the improved burner arrangement described above.

The gas oven of the utility model is provided with the improved burner structure, the ejector pipe 10 is provided with the Venturi structure 30 through a stamping process, and the Venturi structure 30 is sequentially provided with the contraction section 31, the throat knot 32 and the expansion section 33 along the direction from the air inlet end 11 to the air outlet end 12; by extending the span between the throat 32 and the air inlet end 11, the mixing stroke of the fuel gas and the air is extended, and the fuel gas and the air are initially stabilized and then fed into the venturi structure. The mixed gas flow of the fuel gas and the air is gradually accelerated in the contraction section 31, and the secondary air supplementing holes 14 are formed in the contraction section 31, so that secondary air can be absorbed along with the accelerated gas flow, the air supplementing amount in the combustor is further increased, the full degree of combustion is improved, and the carbon monoxide emission rate is reduced.

Further, the gas oven includes a base housing 60; the base shell 60 is provided with a plurality of air feed grooves 61; the air feed groove 61 is arranged close to the injection pipe 10; the secondary air supply hole 14 is formed on a side of the injection pipe 10 away from the air supply groove 61. In order to make the flow of air supplement when air is supplemented from the secondary air supplementing hole 14 to the injection pipe 10, the flow is more stable, the secondary air supplementing hole 14 is arranged on one side of the injection pipe 10 far away from the air feeding groove 61, air cannot be directly fed into the secondary air supplementing hole 14 from the air feeding groove 61, but needs to be fed from the secondary air supplementing hole 14 after being wound around the outer circumference of the injection pipe 10 for half a circle, and when the air in the surrounding environment of the gas oven is unstable, the stability of the air flow sucked by the secondary air supplementing hole 14 is not easily affected.

Of course, the present utility model is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present utility model, and these equivalent modifications and substitutions are included in the scope of the present utility model as defined in the appended claims.

Claims

1. An improved burner structure, comprising: an ejector pipe (10) and a gas diffusion pipe (20);

the injection pipe (10) and the fuel gas diffusion pipe (20) are provided with hollow cavities; the air inlet end (11) of the injection pipe (10) corresponds to the gas nozzle, and the air outlet end (12) is communicated with the gas diffusion pipe (20); the gas diffusion pipe (20) is provided with a plurality of combustion holes (21), and the tail end of the gas diffusion pipe is sealed; the air inlet end (11) is provided with an air inlet groove (13);

the ejector pipe (10) is provided with a Venturi structure (30) through a stamping process; the venturi structure (30) is sequentially provided with a contraction section (31), a throat knot (32) and an expansion section (33) along the direction from the air inlet end (11) to the air outlet end (12); the contraction section (31) is provided with a secondary air supplementing hole (14).

2. The improved burner structure of claim 1, wherein: the gas diffusion pipe (20) is provided with a gas inlet (22), and the gas inlet (22) is connected with the gas outlet end (12) of the injection pipe (10); the gas inlet (22) is provided with a flow dividing sheet (40), and the flow dividing sheet (40) is provided with a flow dividing hole (41); the splitter vane (40) and the gas inlet (22) are provided with a spacing space.

3. The improved burner structure of claim 2, wherein: the combustion holes (21) are positioned on the upper side of the gas diffusion pipe (20); the flow dividing plate (40) is obliquely arranged, the flow dividing hole (41) can be obliquely upwards, and fuel gas is sent out to the direction of the combustion hole (21).

4. The improved burner structure of claim 1, wherein: the ejector tube (10) section is provided with a flow dividing column (50), and the flow dividing column (50) is arranged in the middle of the ejector tube (10).

5. The improved burner structure of claim 4, wherein: the diversion column (50) is a bolt locking piece which is detachably arranged on the injection pipe (10).

6. The improved burner structure of claim 1, wherein: the combustion holes (21) are divided into a plurality of rows of groups; the combustion holes (21) of the same row group are distributed on the same height horizontal plane at intervals; the combustion holes (21) of two adjacent rows are distributed in a mutually-inserted way.

7. The improved burner structure of claim 1, wherein: the throat (32) and the end face of the air inlet end (11) have a span in the range of 75 to 85 mm.

8. The improved burner structure of claim 1, wherein: the secondary air supplementing holes (14) are arranged at intervals.

9. A gas oven, characterized in that: comprising the improved burner arrangement of any one of claims 1-8.

10. The gas oven of claim 9, wherein: the gas oven includes a base housing (60); the base shell (60) is provided with a plurality of air supply grooves (61); the air supply groove (61) is arranged close to the injection pipe (10); the secondary air-filling hole (14) is arranged on one side of the injection pipe (10) far away from the air-feeding groove (61).