Premixing furnace end

Abstract

The utility model relates to the technical field of gas furnace ends, and particularly discloses a premixing furnace end which comprises a furnace shell, an inner shell is arranged in the furnace shell, a combustion cavity is arranged in the inner shell, a premixing cavity with a relatively independent space is arranged at the lower end of the combustion cavity, the combustion cavity is communicated with the premixing cavity, an air cavity is formed between the outer wall of the inner shell and the inner wall of the furnace shell, and the air cavity is communicated with the premixing cavity. The combustion cavity and the premixing cavity are both communicated with the air cavity, and the premixing cavity is communicated with a gas pipe; according to the premixing furnace end, the premixing cavity communicated with the gas pipe is formed in the lower end of the combustion cavity, so that after airflow in the air cavity enters the premixing cavity to be premixed with gas, the premixed gas enters the combustion cavity, meanwhile, the airflow in the air cavity also enters the combustion cavity, the premixed gas is mixed with air again, and the combustion efficiency is improved. The combustion chamber is arranged in the combustion chamber, so that gas can be fully mixed and can be directly combusted in the combustion chamber, the combustion of the gas is more sufficient, and the yellow flame phenomenon is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of gas burners, specifically, especially a premix burner head. Background Art

[0002] The kitchen is the core area for the catering industry to create benefits. In the increasingly fierce competition in the catering market, the kitchen has become the focus for the catering industry to respond to market changes. In the fully premixed commercial gas burner heads in the prior art, it usually includes a furnace shell and an inner shell. There is a combustion chamber inside the inner shell. Gas is directly input into the combustion chamber. By blowing air into the inside of the combustion chamber, the gas and air are premixed in the combustion chamber and then can be directly burned. However, since the premixing positions are all concentrated in the combustion chamber, after the gas enters the combustion chamber, it is very easy to be directly ignited before being fully mixed, and only rely on the air supply during the combustion process to improve the combustion rate, but there will still be a large amount of yellow flames, resulting in incomplete combustion of the gas. Content of the Utility Model

[0003] In order to overcome the defects existing in the prior art, the utility model provides a premix burner head, aiming to solve the above problems.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a premix burner head, including a furnace shell. An inner shell is arranged inside the furnace shell. There is a combustion chamber inside the inner shell. A premixing chamber with a relatively independent space is arranged at the lower end of the combustion chamber. The combustion chamber and the premixing chamber are connected. A wind chamber is formed between the outer wall of the inner shell and the inner wall of the furnace shell. The combustion chamber and the premixing chamber are both connected to the wind chamber. The premixing chamber is connected with a gas pipe.

[0005] In the above-mentioned premix burner head, an air inlet is arranged at the lower end of the furnace shell.

[0006] In the above-mentioned premix burner head, the inner shell includes a top cover. The top cover covers the upper end of the furnace shell. A combustion cylinder located inside the inner shell is arranged on one side of the top cover. A premixing cylinder is arranged on the side of the combustion cylinder far away from the top cover. The combustion chamber is located inside the combustion cylinder. The premixing chamber is located inside the premixing cylinder. A detachable cover plate is arranged between the combustion chamber and the premixing chamber to form a relatively independent space between the combustion chamber and the premixing chamber. A plurality of premixing air holes are opened on the cover plate.

[0007] In the above-mentioned premix burner head, the top cover, the combustion cylinder and the premixing cylinder are of an integral structure.

[0008] In the above-mentioned premix burner head, the inner diameter of the combustion cylinder is larger than the inner diameter of the premixing cylinder. The cover plate covers the lower end of the combustion cylinder. A fixing bolt is penetrated through the cover plate, and the fixing bolt is in threaded connection with the lower end of the premixing cylinder.

[0009] In the above-mentioned premixed burner head, a gas pipe connection hole is provided on one side of the premixing cylinder, the gas pipe penetrates through the furnace shell, and one end of the gas pipe is threadedly connected to the gas pipe connection hole.

[0010] In the above-mentioned premixed burner head, a first air inlet is provided on the cylinder wall of the combustion cylinder, and a second air inlet is provided on the cylinder wall of the premixing cylinder.

[0011] In the above-mentioned premixed burner head, a ring groove is provided on one side of the top cover close to the combustion cylinder, a raised snap ring is provided on the upper edge of the furnace shell, the ring groove is covered on the snap ring, and a screw hole is provided in the ring groove to fix the top cover on the furnace shell by passing a screw through the screw hole.

[0012] In the above-mentioned premixed burner head, a plurality of through holes are provided in the ring groove, the through holes are located on one side of the snap ring, and the plurality of through holes communicate with the air cavity, and the plurality of through holes are distributed around the outside of the upper end of the combustion cavity.

[0013] The beneficial effect of the present utility model is that by providing a premixing cavity communicated with the gas pipe at the lower end of the combustion cavity, the air flow in the air cavity enters the premixing cavity to be premixed with the gas, and the premixed gas enters the combustion cavity. At the same time, the air flow in the air cavity also enters the combustion cavity, so that the premixed gas is mixed with air again, enabling the gas to be fully mixed and directly burned in the combustion cavity, making the combustion of the gas more complete and preventing the phenomenon of yellow flame. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional structural diagram of the premixed burner head of the present utility model.

[0015] Figure 2 is a three-dimensional structural diagram of the inner shell.

[0016] Figure 3 is a sectional structural diagram of the premixed burner head of the present utility model.

[0017] Figure 4 is Figure 3 an enlarged structural diagram at A in

[0018] Figure 5 is a top view structural diagram of the inner shell.

[0019] In the figure: furnace shell 1, inner shell 2, combustion cavity 3, top cover 4, combustion cylinder 5, premixing cylinder 6, first air inlet 7, gas pipe connection hole 8, second air inlet 9, air cavity 10, premixing cavity 11, cover plate 12, fixing bolt 13, premixing air hole 14, snap ring 15, ring groove 16, screw hole 17, screw 18, through hole 19, gas pipe 20, air blowing port 21. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The specific embodiments of the present utility model will be further described below in conjunction with the accompanying drawings. It should be noted here that the description of these embodiments is used to help understand the present utility model, but does not constitute a limitation on the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] Combined with Figures 1 to 5 A premixed burner head shown, including a furnace shell 1, an inner shell 2 is provided in the furnace shell 1, a combustion chamber 3 is provided in the inner shell 2, a premixing chamber 11 with a relatively independent space is arranged at the lower end of the combustion chamber 3, the combustion chamber 3 and the premixing chamber 11 are communicated, a wind chamber 10 is formed between the outer wall of the inner shell 2 and the inner wall of the furnace shell 1, both the combustion chamber 3 and the premixing chamber 11 are communicated with the wind chamber 10, and a gas pipe 20 is communicated with the premixing chamber 11; in this embodiment, by arranging a premixing chamber 11 communicated with the gas pipe 20 at the lower end of the combustion chamber 3, the air flow in the wind chamber 10 enters the premixing chamber 11 to be premixed with the gas, and then the premixed gas enters the combustion chamber 3. At the same time, the air flow in the wind chamber 10 also enters the combustion chamber 3, so that the premixed gas is mixed with air again, enabling the gas to be fully mixed and directly burned in the combustion chamber 3, making the combustion of the gas more complete and preventing the phenomenon of yellow flame.

[0022] It is worth noting that a blower port 21 is arranged at the lower end of the furnace shell 1 in this embodiment; the blower port 21 is communicated with a blower device, such as a blower and other equipment, so that the air flow is blown into the wind chamber.

[0023] The inner shell 2 of this embodiment includes a top cover 4, the top cover 4 is covered on the upper end of the furnace shell 1, a combustion cylinder 5 located inside the inner shell 2 is arranged on one side of the top cover 4, a premixing cylinder 6 is arranged on the side of the combustion cylinder 5 away from the top cover 4, the combustion chamber 3 is located inside the combustion cylinder 5, the premixing chamber 11 is located inside the premixing cylinder 6, and a detachable cover plate 12 is arranged between the combustion chamber 3 and the premixing chamber 11 to form a relatively independent space between the combustion chamber 3 and the premixing chamber 11. A plurality of premixing air holes 14 are opened on the cover plate 12; this makes the residence time of the gas in the premixing chamber 11 relatively longer, and the premixed gas can better enter the combustion chamber 3 in the combustion cylinder 5 through the plurality of premixing air holes 14, enabling the gas to be output from bottom to top, making the flame more concentrated in the middle, and the air flow in the combustion chamber 3 sprays towards the middle. Before the flame burns, the gas will be further mixed, thus realizing the full mixing of the gas and making the flame burn more fully.

[0024] It should be noted that the top cover 4, the combustion cylinder 5 and the premixing cylinder 6 of this embodiment are of an integral structure, formed by integral cast iron, and the structure is simpler.

[0025] The inner diameter of the combustion cylinder 5 in this embodiment is larger than that of the premixing cylinder 6. The cover plate 12 is provided at the lower end of the combustion cylinder 5. A fixing bolt 13 is passed through the cover plate 12, and the fixing bolt 13 is threadedly connected to the lower end of the premixing cylinder 6; the combustion chamber 3 and the premixing chamber 11 are isolated by the cover plate 12, so that the combustion chamber 3 and the premixing chamber 11 are communicated through a plurality of premixing air holes 14, facilitating better premixing of the gas in the premixing chamber 11. At the same time, the cover plate 12 can be removed by removing the fixing bolt 13 for easy cleaning.

[0026] One side of the premixing cylinder 6 in this embodiment is provided with a gas pipe connection hole 8. The gas pipe 20 penetrates through the furnace shell 1, and one end of the gas pipe 20 is threadedly connected to the gas pipe connection hole 8, enabling the gas pipe 20 to be conveniently installed on the premixing cylinder 6.

[0027] It should be noted that a first air inlet 7 is provided on the cylinder wall of the combustion cylinder 5 in this embodiment, and a second air inlet 9 is provided on the cylinder wall of the premixing cylinder 6; when the air flow is input from the first air inlet 7 or the second air inlet 9, it blows towards the center of the corresponding cavity. Since the gas is sprayed towards the center when input from the gas pipe 20, the air flow can turbulently flow the gas faster, enabling the gas to mix with air faster. When the other premixing gas is input from the plurality of premixing air holes 14 from bottom to top, the air flow turbulently flows the premixed gas again, thus quickly mixing again and outputting upwards for combustion.

[0028] One side of the top cover 4 in this embodiment close to the combustion cylinder 5 is provided with an annular groove 16. The upper end edge of the furnace shell 1 is provided with a protruding snap ring 15. The annular groove 16 is covered on the snap ring 15, and a screw hole 17 is provided in the annular groove 16 to fix the top cover 4 on the furnace shell 1 by passing a screw 18 through the screw hole 17; by covering the annular groove 16 on the protruding snap ring 15, after the screw 18 is connected and fixed, the top cover 4 and the upper end of the furnace shell 1 are sealed to prevent air leakage. Moreover, when disassembling, only the screw 18 needs to be disassembled to remove the inner shell 2.

[0029] A plurality of through holes 19 are provided in the annular groove 16 in this embodiment. The through holes 19 are located on one side of the snap ring 15, and the plurality of through holes 19 are communicated with the air cavity 10. The plurality of through holes 19 are distributed around the outside of the upper end of the combustion chamber 3; the air flow in the air cavity 10 can also be input and output through the plurality of through holes 19, enabling further air supply during combustion of the flame and making the flame burn well.

[0030] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principles and spirit of the present invention, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present invention.

Claims

1. A premixing furnace head, comprising a furnace shell (1), characterized in that: An inner shell (2) is provided inside the furnace shell (1), a combustion chamber (3) is provided inside the inner shell (2), a relatively independent premixing chamber (11) is provided at the lower end of the combustion chamber (3), the combustion chamber (3) and the premixing chamber (11) are connected, an air chamber (10) is formed between the outer wall of the inner shell (2) and the inner wall of the furnace shell (1), the combustion chamber (3) and the premixing chamber (11) are both connected to the air chamber (10), and a gas pipe (20) is provided in communication with the premixing chamber (11).

2. A premix burner according to claim 1, characterized in that: The lower end of the furnace shell (1) is provided with a blast port (21).

3. A premix burner according to claim 1, characterized in that: The inner shell (2) comprises a top cover (4), wherein the top cover (4) is arranged on the upper end of the furnace shell (1), a combustion cylinder (5) located in the inner shell (2) is arranged on one side of the top cover (4), a premixing cylinder (6) is arranged on the side of the combustion cylinder (5) away from the top cover (4), the combustion chamber (3) is located in the combustion cylinder (5), the premixing chamber (11) is located in the premixing cylinder (6), a detachable cover plate (12) is arranged between the combustion chamber (3) and the premixing chamber (11), so that a relatively independent space is formed between the combustion chamber (3) and the premixing chamber (11), and a plurality of premixing holes (14) are opened on the cover plate (12).

4. A premix burner according to claim 3, characterized in that: The top cover (4), the combustion cylinder (5) and the premixing cylinder (6) are an integrated structure.

5. A premix burner according to claim 4, characterized in that: The inner diameter of the combustion cylinder (5) is larger than the inner diameter of the premixing cylinder (6); the cover plate (12) is arranged on the lower end of the combustion cylinder (5); a fixing bolt (13) is passed through the cover plate (12); and the fixing bolt (13) is threadedly connected to the lower end of the premixing cylinder (6).

6. A premix burner according to claim 5, characterized in that: A gas pipe connection hole (8) is provided on one side of the premixing cylinder (6), the gas pipe (20) passes through the furnace shell (1), and one end of the gas pipe (20) is threadedly connected to the gas pipe connection hole (8).

7. A premix burner according to claim 3, characterized in that: A first air inlet (7) is provided on the wall of the combustion cylinder (5), and a second air inlet (9) is provided on the wall of the premixing cylinder (6).

8. A premix burner according to claim 3, characterized in that: A ring groove (16) is provided on one side of the top cover (4) close to the combustion tube (5); a raised clamping ring (15) is provided on the upper edge of the furnace shell (1); the ring groove (16) is covered on the clamping ring (15); a screw hole (17) is provided in the ring groove (16) so that a screw (18) can be passed through the screw hole (17) to fix the top cover (4) on the furnace shell (1).

9. A premixing burner according to claim 8, characterized in that: A plurality of through holes (19) are provided in the annular groove (16); the through holes (19) are located on one side of the clamping ring (15); the plurality of through holes (19) are connected to the wind cavity (10); and the plurality of through holes (19) are distributed around the outer side of the upper end of the combustion cavity (3).

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