A burner for suppressing flashback and adjusting infrared uniformity

Abstract

The present invention discloses a burner for suppressing tempering and adjusting infrared uniformity, comprising a composite metal mesh, porous ceramics, an air baffle plate and an ejector tube arranged in an upper and lower interval; the air flow field between the ejector tube and the air baffle plate forms a first cavity; the air flow field between the air baffle plate and the porous ceramic forms a second cavity; the air flow field between the porous ceramic and the composite metal mesh forms a third cavity. The present invention controls the tempering and power limitation problems of the ceramic burner through the burner structure of the ceramic porous plate combined with the composite metal mesh, and the composite metal mesh provided is conducive to adjusting the uniformity of the infrared rays exposed by the burner.

Description

Technical Field

[0001] The invention relates to the technical field of outdoor stoves, in particular to a burner capable of suppressing backfire and adjusting infrared uniformity. Background Art

[0002] Gas heating stoves on the market that use ceramics as combustion catalysts have the defects of low power and slow ceramic burning speed; the unit area power of ceramic combustion catalysts on the market can only reach about 0.12W / mm² to 0.19W / mm², resulting in a large size of heaters with high-power ceramic burners; in addition, since the ceramic burner is red for a long time, the heat is easily transferred to the inner cavity of the burner, causing the burner to flash back, so the size of a single ceramic plate and the combustion and heating time are limited.

[0003] The metal mesh burners on the market use flames to burn metal, which turns into infrared after being heated. One type is that the flame generated by a single burner burns the metal mesh to achieve heating; the other type is that the high-temperature resistant foam metal mesh or multi-layer metal mesh is directly made into a burner catalyst. The former is a single-layer metal mesh with low infrared radiation density; the latter is limited by the high cost of high-temperature resistant foam metal processing technology. Summary of the invention

[0004] The object of the present invention is to provide a burner capable of suppressing flashback and adjusting infrared uniformity, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a burner for suppressing backfire and adjusting infrared uniformity, comprising a composite metal mesh, a porous ceramic, an air baffle and an ejector tube arranged in an upper and lower interval;

[0006] The air flow field between the ejector tube and the air baffle forms a first cavity;

[0007] The air flow field between the air baffle and the porous ceramic forms a second cavity;

[0008] The flow field between the porous ceramic and the composite metal mesh forms a third cavity.

[0009] Preferably, the composite metal mesh is obtained by stacking two metal meshes, including an upper metal mesh and a lower metal mesh.

[0010] Preferably, the mesh number of the upper metal mesh is twice that of the lower metal mesh, and the wire diameter of the upper metal mesh is 1.5-2 times that of the lower metal mesh.

[0011] Preferably, the upper metal mesh and the lower metal mesh are spaced 0.1 mm to 0.5 mm apart.

[0012] Preferably, the composite metal mesh as a whole is a structure that is arched from four sides to the middle, and the four ends of the composite metal are provided with straight sections, the inner side of the straight section is connected to an upwardly raised reverse arc section, the upper end of the reverse arc section is connected to a forward arc section, and the inner side of the forward arc section is connected to an arch section.

[0013] Preferably, the porous ceramic, the air baffle and the ejector tube are all installed in the bottom shell, the composite metal mesh cover is arranged on the upper end surface of the porous ceramic, and the bottom of the composite metal mesh is fixed to the upper edge of the bottom shell.

[0014] Preferably, the bottom of the bottom shell is provided with an inner cover protruding upward, and the inner cover is raised at the bottom of the bottom shell to form a receiving cavity for fixing the ejector tube;

[0015] One end of the inner cover is surrounded by the bottom shell to form a diffusion cavity, and the output end of the ejector tube extends into the diffusion cavity, and the diffusion cavity is a part of the first cavity;

[0016] The first cavity has a structure that is wide at the top and narrow at the bottom.

[0017] Preferably, the air baffle includes a middle baffle and side baffles, the middle baffle is horizontally arranged on the top of the inner cover, the side baffles are spaced apart from the middle baffle to form a flow gap for gas to pass through, and the side baffles are all arranged to be inclined downward.

[0018] Preferably, the air baffle is a quadrilateral structure as a whole, the middle baffle is arranged along the length direction, the middle baffle is a hexagonal structure, and the side baffles include triangular baffles and trapezoidal baffles. The triangular baffles and the trapezoidal baffles are arranged on both sides of the middle baffle, and a bidirectional Y-shaped flow gap is formed on both sides of the middle baffle.

[0019] Preferably, a spoiler column is provided at the bottom of one side of the ejector tube close to the output end.

[0020] Compared with the prior art, the invention has the following beneficial effects: the invention controls the tempering of the ceramic burner and solves the problem of power limitation through the burner structure of the ceramic porous plate combined with the composite metal mesh, and the processing method is simple and the cost is more advantageous than the high temperature resistant foam metal burner. At the same time, the use of the composite metal mesh is conducive to adjusting the infrared uniformity of the burner. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall structure of the composite metal mesh of the present invention;

[0023] Figure 3 is a schematic side view of the composite metal mesh of the present invention;

[0024] Figure 4It is an overall schematic diagram of the bottom shell structure of the present invention;

[0025] Figure 5 is a bottom schematic diagram of the bottom shell structure of the present invention;

[0026] Figure 6 is a cross-sectional view of the bottom shell structure of the present invention;

[0027] Figure 7 is a top view of the air baffle of the present invention;

[0028] Figure 8 is a cross-sectional view of the present invention applied to a stove;

[0029] Fig. 9 It is a schematic diagram of the assembly state of the air baffle and the bottom shell structure of the present invention.

[0030] In the figure: 1, reflecting plate; 2, steel wire furnace rack; 21, steel wire mesh; 3, composite metal mesh; 31, straight section; 32, reverse arc section; 33, forward arc section; 34, arch section; 5, porous ceramic; 6, ejector tube; 61, spoiler column; 7, nozzle; 8, air baffle; 81, triangular baffle; 82, middle baffle; 83, trapezoidal baffle; 9, bottom shell; 91, inner cover; 92, accommodating chamber; 93, diffusion chamber; 001, first cavity; 002, second cavity; 003, third cavity. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1-9 As shown, the present invention provides a technical solution: a burner for suppressing tempering and adjusting infrared uniformity, comprising a composite metal mesh 3, a porous ceramic 5, an air baffle 8 and an ejector tube 6 arranged in an upper and lower interval;

[0033] The air flow field between the ejector tube 6 and the air baffle 8 forms a first cavity 001;

[0034] The air flow field between the air baffle 8 and the porous ceramic 5 forms a second cavity 002;

[0035] The air flow field between the porous ceramic 5 and the composite metal mesh 3 forms a third cavity 003;

[0036] Reference Figure 2 as well as Figure 3As shown, the composite metal mesh 3 is obtained by superimposing two metal meshes, including an upper metal mesh and a lower metal mesh. The mesh number of the upper metal mesh is twice that of the lower metal mesh, and the wire diameter of the upper metal mesh is 1.5-2 times that of the lower metal mesh. In this embodiment, the upper metal mesh adopts 80 mesh 0.12mm wire diameter, and the lower metal mesh adopts 40 mesh 0.2mm wire diameter. The upper metal mesh and the lower metal mesh are spaced 0.1mm-0.5mm, preferably 0.3mm. The lower metal mesh with a wire diameter of 40 mesh 0.2mm is located in the lower layer to play a supporting role, and the upper metal mesh with a wire diameter of 80 mesh 0.12 is located in the upper layer to increase the density of the fire holes. When burning, the 80 mesh 0.12mm metal mesh can quickly burn red and turn to infrared radiation, and the 40 mesh 0.2mm metal mesh will also turn red later, but it can maintain the shape of the 003 cavity without causing major changes.

[0037] The design of the composite metal mesh 3 forms a third cavity 003. The gas burns on the surface of the composite metal mesh 3 and converts heat into infrared. After long-term use, only the temperature of the third cavity 003 is high, and the porous ceramic 5 does not turn red. Therefore, the internal temperature of the first cavity 001 and the second cavity 002 will not be too high, thereby solving the problem of flashback during high power and long-term combustion.

[0038] What is more worth mentioning is that the design of the third cavity 003 can increase the pressure and flow rate upper limit of the gas entering the first cavity 001, thereby increasing the flame emission speed.

[0039] In addition, the overlapping design of metal meshes with different mesh sizes, such as 40# and 80#, forms micro-pores similar to foam metal, which increases the combustion area and has better wind resistance.

[0040] The gap design between the upper metal mesh and the lower metal mesh solves the problem of friction noise caused by the mesh expanding due to heat.

[0041] On this basis, the overall structure of the composite metal mesh is also specially designed, referring to Figure 3 As shown, the composite metal mesh 3 is a structure that is arched from four sides to the middle. The four ends of the composite metal mesh 3 are provided with straight sections 31 for connecting to the stove body. The inner side of the straight section 31 is connected to a reverse arc section 32 that is upwardly tilted. The upper end of the reverse arc section 32 is connected to a forward arc section 33. The inner side of the forward arc section 33 is connected to an arch section 34. The overall arch and edge curvature design greatly improves the service life of the composite metal mesh, avoids the situation of unstable combustion caused by deformation during use, and is conducive to improving the fineness of the fire.

[0042] Reference Figure 8As shown, when in use, the fuel gas is dispersed by the air baffle 8 and transported upward in the form of a vortex. After being rectified by the porous ceramic 5, it continues to be transported upward until a vortex is formed on the surface of the composite metal mesh 3, where it is ignited and burned.

[0043] Reference Figure 4 As shown, the porous ceramic 5 , the air baffle 8 and the ejector tube 6 are all installed in the bottom shell 9 , the composite metal mesh 3 is covered on the upper end surface of the porous ceramic 5 , and the bottom of the composite metal mesh 3 is fixed on the upper edge of the bottom shell 9 .

[0044] like Figure 5-7 As shown, the bottom of the bottom shell 9 is provided with an inner cover 91 protruding upward, and the inner cover 91 is raised at the bottom of the bottom shell 9 to form a receiving cavity 92 for fixing the ejector tube 6;

[0045] One end of the inner cover 91 is surrounded by the bottom shell 9 to form a diffusion cavity 93, and the output end of the ejector tube 6 extends into the diffusion cavity 93. The diffusion cavity 93 is a part of the first cavity 001;

[0046] Reference Figure 6 As shown, the first cavity 001 is a structure that is wide at the top and narrow at the bottom.

[0047] Reference Figure 1 , Figure 6 as well as Figure 7 As shown, the first cavity 001 is the output position of the ejector tube 6. Since the ejector tube 6 is connected to the gas supply pipe from the nozzle 7, the gas source of the gas supply pipe is a gas tank. The outlet pressure of the gas tank output pressure regulating valve is relatively large, generally at 0.13 MPa, which is two orders of magnitude larger than the 0.0028 MPa of domestic gas. Therefore, the first cavity 001 of this embodiment is designed to have the function of slowing down the airflow. The overall airflow deceleration is achieved by using a structure that is wide at the top and narrow at the bottom. Figure 5 as well as Figure 8 As shown, a diffusion chamber 93 is designed, and the depth of the diffusion chamber 93 is greater than the accommodating chamber 92, so that after the airflow is output from the ejector tube 6, it hits the inner wall and then achieves uniform diffusion, thereby contacting the air baffle 8.

[0048] Continue to refer to Figure 8 As shown, when the nozzle 7 sprays the combustible gas in the gas tank into the ejector tube 6, under the action of negative pressure, air enters the ejector tube 6 from the bottom and mixes. In the traditional structure, the mixing of air and combustible gas is insufficient, which affects the uniformity of the flame. In this embodiment, a spoiler column 61 is provided in the ejector tube 6. Referring to the figure, the spoiler column 61 is arranged at the bottom of one side of the ejector tube 6 close to the output end. In practical applications, a threaded hole is opened at the installation location, and a screw is fixed on the threaded hole, and the screw can realize the function of the spoiler column 61. The head of the screw protrudes in the ejector tube 6 to realize the function of spoiler, promote the uniform mixing of air and combustible gas, and improve the uniformity of combustion.

[0049] Reference Figure 6 , Figure 7 as well as Fig. 9 As shown, the air baffle 8 includes a middle baffle 82 and side baffles. The middle baffle 82 is horizontally arranged on the top of the inner cover 91. The side baffles are spaced apart from the middle baffle 82 to form a flow gap for gas to pass through, and the side baffles are all arranged tilted downward. The air baffle 8 is a quadrilateral structure as a whole. The middle baffle 82 is arranged along the length direction. The middle baffle 82 is a hexagonal structure. The side baffles include a triangular baffle 81 and a trapezoidal baffle 83. The triangular baffle 81 and the trapezoidal baffle 83 are arranged on both sides of the middle baffle 82, and a bidirectional Y-shaped flow gap is formed on both sides of the middle baffle 82. Figure 7 As shown in , when making it, first select a rectangular plate and cut out the position of the flow gap to get Figure 7 The structure of the middle baffle 82 and the side baffles in the embodiment is finally pressed down along the connecting edge between the side baffle and the rectangular plate to obtain the air baffle 8. Compared with the structure of the traditional air baffle with direct holes, the air baffle proposed in this embodiment is more conducive to gas pressure reduction, and the air flow noise is smaller, meeting the requirement of less than 80 decibels. At the same time, it has a better effect of uniform air flow and achieves better flame uniformity.

[0050] The burner of this embodiment can be used in a heating stove and a cooking stove, such as Figure 1 As shown, the cooker can be directly placed on the wire grill 2 for heating. Figure 1 As shown, the steel wire grate 2 includes a support frame and a steel wire mesh 21. The steel wire mesh 21 covers the upper end surface of the steel wire grate 2. The bottom support of the support frame is fixed to the upper edge of the furnace. Figure 2 It can be seen that the steel wire mesh 21 and the composite metal mesh 3 actually form a certain spacing space, which can improve the wind resistance and infrared conversion performance.

[0051] Continue to refer to Figure 1 As shown, the reflector 1 is provided with several groups, and the bottom of the reflector 1 is equal to or lower than the height of the composite metal mesh 3. The function of the reflector is to concentrate the infrared of the composite metal mesh by reflection. A mounting bracket is provided on the upper edge of the stove body, and the reflector 1 is hinged to the mounting bracket. The reflector 1 can rotate relative to the mounting bracket to adjust the mounting angle of the reflector 1.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A burner for suppressing flashback and adjusting infrared uniformity, characterized in that: It comprises a composite metal mesh (3), a porous ceramic (5), an air baffle (8) and an ejector tube (6) which are arranged in an upper and lower spaced relationship; The air flow field between the ejector tube (6) and the air baffle plate (8) forms a first cavity (001); The air flow field between the air baffle plate (8) and the porous ceramic (5) forms a second cavity (002); The air flow field between the porous ceramic (5) and the composite metal mesh (3) forms a third cavity (003); The composite metal mesh (3) is obtained by stacking two metal meshes, including an upper metal mesh and a lower metal mesh. The upper metal mesh and the lower metal mesh are spaced 0.1 mm to 0.5 mm apart. The mesh number of the upper metal mesh is twice the mesh number of the lower metal mesh. The composite metal mesh (3) as a whole is a structure that is arched from four sides toward the middle. The wire diameter of the upper metal mesh is 1.5-2 times that of the lower metal mesh; The four ends of the composite metal net (3) are provided with straight sections (31), the inner side of the straight section (31) is connected to an upwardly tilted reverse arc section (32), the upper end of the reverse arc section (32) is connected to a forward arc section (33), and the inner side of the forward arc section (33) is connected to an arched section (34); An inner cover (91) protruding upward is provided at the bottom of the bottom shell (9), and the inner cover (91) is raised at the bottom of the bottom shell (9) to form a receiving cavity (92) for fixing the ejector tube (6); One end of the inner cover (91) is surrounded by the bottom shell (9) to form a diffusion cavity (93), and the output end of the ejector tube (6) extends into the diffusion cavity (93), and the diffusion cavity (93) is a part of the first cavity (001); The first cavity (001) is a structure that is wide at the top and narrow at the bottom; The air baffle (8) comprises a middle baffle (82) and side baffles. The middle baffle (82) is horizontally arranged on the top of the inner cover (91). The side baffles are arranged at intervals from the middle baffle (82) to form a flow gap for gas to pass through. The side baffles are arranged obliquely downward. The air baffle (8) is a quadrilateral structure as a whole. The middle baffle (82) is arranged along the length direction. The middle baffle (82) is a hexagonal structure. The side baffles comprise a triangular baffle (81) and a trapezoidal baffle (83). The triangular baffle (81) and the trapezoidal baffle (83) are arranged on both sides of the middle baffle (82) to form a bidirectional Y-shaped flow gap on both sides of the middle baffle (82).

2. A burner for suppressing flashback and adjusting infrared uniformity according to claim 1, characterized in that: The porous ceramic (5), the air baffle (8) and the ejector tube (6) are all installed in the bottom shell (9), the composite metal mesh (3) is covered on the upper end surface of the porous ceramic (5), and the bottom of the composite metal mesh (3) is fixed to the upper edge of the bottom shell (9).

3. A burner for suppressing flashback and adjusting infrared uniformity according to claim 1, characterized in that: A spoiler column (61) is provided at the bottom of one side of the ejector tube (6) close to the output end.

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