CN112762445A

CN112762445A - Premixing burner

Info

Publication number: CN112762445A
Application number: CN202110069234.1A
Authority: CN
Inventors: 范林啸
Original assignee: Hebei Enron General Equipment Co ltd
Current assignee: Hebei Enron General Equipment Co ltd
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2021-05-07
Anticipated expiration: 2041-01-19
Also published as: CN112762445B

Abstract

The application relates to a premix burner belongs to the gas cooking utensils field, includes: the cooking range is arranged above the premixing shell, a premixing chamber is formed in the premixing shell, and a combustion chamber is formed in the cooking range; the bottom of the premixing shell is provided with a gas nozzle, a first nozzle cap covers the outside of the gas nozzle, and the upper part of the side wall of the first nozzle cap is provided with a first vent hole; an air inlet is formed in the lower part of the side wall of the premixing shell; a speed-increasing channel is formed in the cooking range and is communicated with the premixing chamber and the combustion chamber, and the diameters of openings at two ends of the speed-increasing channel are larger than that of the middle part of the speed-increasing channel. The application provides a premix burner can improve the mixed effect of gas and air to it is more abundant to make the burning.

Description

Premixing burner

Technical Field

The application relates to the technical field of gas cookers, in particular to a premix burner.

Background

Gas has entered thousands of households as a clean and convenient energy source. At present, a gas stove for cooking food usually only has one pipeline for conveying gas, and the gas is sprayed out from a nozzle to drive air to enter the stove and be sprayed out from the stove for combustion. The gas cooker has the advantages that the amount of air which can be introduced is small, so that the insufficient combustion of gas is easy to generate carbon monoxide, the utilization rate of the gas is low, and the energy waste and the environmental pollution are caused.

Disclosure of Invention

In order to improve among the relevant art gas cooking utensils make the gas burning insufficient thereby cause the not enough of energy waste and environmental pollution, the application provides a premix combustor.

The premixing burner provided by the application adopts the following technical scheme:

a premixing burner comprises a premixing shell and a cooking range, wherein the cooking range is arranged above the premixing shell, a premixing chamber is formed in the premixing shell, and a combustion chamber is formed in the cooking range; wherein the content of the first and second substances,

a gas nozzle is arranged at the bottom of the premixing shell, a first nozzle cap is covered outside the gas nozzle, and a first vent hole is formed in the upper part of the side wall of the first nozzle cap; an air inlet is formed in the lower part of the side wall of the premixing shell;

a speed-increasing channel is formed in the cooking range and is communicated with the premixing chamber and the combustion chamber, and the diameters of openings at two ends of the speed-increasing channel are larger than that of the middle part of the speed-increasing channel.

Through adopting above-mentioned technical scheme, can improve the mixed effect of air and gas, make the burning more stable, abundant.

Optionally, a plurality of swirl vanes are arranged between the first spray cap side wall and the premix housing side wall, the swirl vanes are located below the first vent hole, and the plurality of swirl vanes are inclined at the same angle in the same direction along the circumferential direction of the first spray cap.

Through adopting above-mentioned technical scheme, can form stable air current, make air and gas mixture abundant.

Optionally, an air deflector is disposed between the side wall of the premix housing and the lower portion of the side wall of the first nozzle cap, the air deflector is disposed close to the air inlet, and the air deflector is located below the swirl vane.

Through adopting above-mentioned technical scheme, can prevent that the air of supplying from taking place the turbulent flow, improve the stability of air current.

Optionally, the height of the air deflector is greater than or equal to the height of the air inlet.

Optionally, the wind guide direction of the wind deflector is the same as the inclination direction of the swirl vanes.

Optionally, a second spraying cap is arranged inside the first spraying cap, the second spraying cap is arranged outside the gas nozzle, and a second vent hole is formed in the upper portion of the side wall of the second spraying cap.

Through adopting above-mentioned technical scheme, can reduce the speed of gas, improve the homogeneity that the gas diffuses.

Optionally, a flow equalizing plate is arranged between the premixing chamber and the combustion chamber, and a plurality of flow equalizing holes are formed in the flow equalizing plate.

Through adopting above-mentioned technical scheme, can improve the homogeneity that the mist of gas and air got into the combustion chamber, improve the stability and the homogeneous degree of burning.

Optionally, an infrared ceramic plate is covered at one end of the combustion chamber far away from the premixing chamber, and a plurality of air outlets are uniformly distributed on the infrared ceramic plate.

By adopting the technical scheme, the heat efficiency of the premix burner can be improved.

Optionally, the premix burner provided by the present application further comprises an ignition device.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the speed increasing channel, the uniformity of mixing of gas and air is improved, and the temperature of a local boundary area in a combustion chamber can be improved, so that combustion is more uniform and sufficient;

2. through setting up aviation baffle and whirl leaf, improved the stability of air supply, can further improve the stability of the mixing homogeneity of gas and air and combustion process.

Drawings

FIG. 1 is a schematic three-dimensional structure of a premix burner;

FIG. 2 is a schematic three-dimensional cross-sectional view of a premix burner;

FIG. 3 is a schematic view of an arrangement of air deflectors;

FIG. 4 is a schematic view of an arrangement of an air deflector and a swirl vane.

Description of reference numerals: 1. a premix housing; 11. a premixing chamber; 12. an air inlet; 2. a cooking range; 21. a combustion chamber; 22. a speed increasing channel; 3. a gas burner; 4. a first spray cap; 41. a first top plate; 42. a first vent hole; 5. a second spray cap; 51. a second top plate; 52. a second vent hole; 6. an air deflector; 7. a swirl vane; 8. a flow equalizing plate; 81. a flow equalizing hole; 9 a protective housing; 91 carrying the board.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

Referring to fig. 1 and 2, the embodiment of the present application discloses a premix burner including a premix housing 1 and a burner head 2. The premixing device comprises a premixing shell 1, a cooking range 2, a cooking cavity and a control device, wherein the premixing shell 1 is arranged above the cooking range 2, and a premixing chamber 11 is formed in the premixing shell 1; the outside cladding of kitchen range 2 has protection casing 9, and protection casing 9 links to each other with premixing casing 1, is formed with combustion chamber 21 and acceleration rate passageway 22 in the kitchen range 2, and premixing chamber 11 communicates through acceleration rate passageway 22 with combustion chamber 21. The application provides a premix combustor can improve the degree of mixing of gas and air through artifical the letting in air in premixing room 11 for the gas can the abundant burning, improves the gas utilization ratio.

Specifically, referring to fig. 2, the premixing casing 1 is a cylindrical hollow structure, the premixing chamber 11 is arranged at the upper part of the premixing casing 1, the gas nozzle 3 is arranged in the middle of the bottom plate of the premixing casing 1 in a penetrating manner, one end of the gas nozzle 3 is arranged outside the premixing casing 1 and is used for being connected with a gas pipeline, and the other end of the gas nozzle 3 is arranged inside the premixing casing 1. A first nozzle cap 4 is provided on the outside of the portion of the gas nozzle 3 located inside the premix housing 1, the first nozzle cap 4 is cylindrical, and a first top plate 41 is provided on the top. The upper portion of the side wall of the first nozzle cap 4 is uniformly provided with a plurality of first vent holes 42 along the circumferential direction of the side wall, and after the gas is sprayed out from the gas nozzle 3, the gas can be uniformly diffused along the first vent holes 42 to enter the premixing chamber 11 to be mixed with the air under the blocking action of the first top plate 41.

Because the gas has certain pressure when spouting into, when the gas directly spouts first cap 4 inside, because of the great gas velocity makes the gas that diffuses through first air vent 42 uneven, consequently, still be provided with the second in first cap 5 that spouts 4 inside. Specifically, the second spray cap 5 covers the outside of the gas nozzle 3, the second spray cap 5 is cylindrical, and the top of the second spray cap 5 is provided with a second top plate 51. The side wall of the second spray cap 5 is uniformly provided with a plurality of second vent holes 52, when the gas is sprayed into the second spray cap 5, under the blocking action of the second top plate 51, the gas speed is reduced and the gas is diffused along the second vent holes 52 into the cavity of the first spray cap 4, and the gas is further uniformly diffused along the first vent holes 42 on the first spray cap 4 into the premixing chamber 11.

Referring to fig. 1 and 3, an air inlet 12 is disposed at a lower portion of a side wall of the premixing casing 1, an air deflector 6 is fixedly disposed between the premixing casing 1 and the first nozzle cap 4, the air deflector 6 is disposed near the air inlet 12, the air deflector 6 enables air entering from the air inlet 12 to move in a circumferential direction in a space between the premixing casing 1 and the first nozzle cap 4, and prevents the air moving in the circumferential direction from interfering with the air entering from the air inlet 12 to generate turbulence, so that air flow is stable and is fully mixed with gas, and stability of gas combustion is improved. The height of the air deflector 6 is more than or equal to the size of the air inlet 12 in the vertical direction, so that the air deflecting effect is ensured.

Referring to fig. 2 and 4, a plurality of swirl vanes 7 are disposed between the outer surface of the sidewall of the first nozzle cap 4 and the inner surface of the premix housing 1, and the plurality of swirl vanes 7 are uniformly distributed along the circumferential direction of the first nozzle cap 4. The plurality of swirl vanes 7 are inclined in the same direction and at the same angle along the circumferential direction of the first nozzle cap 4. The plurality of swirl vanes 7 are positioned below the first vent hole in the vertical direction, and the inclination direction of the plurality of swirl vanes 7 is the same as the air guide direction of the air deflector 6. Through setting up whirl leaf 7, can make the air form spiral ascending stable air current after getting into the space between premixing casing 1 and first nozzle cap 4, make air and gas further homogeneous mixing. And, stable air current has higher wind pressure, can drive the stable combustion chamber 21 that gets into of gas for the combustion process is more stable.

Referring to fig. 2, the protective housing 9 includes a bearing plate 91, the bearing plate 91 is provided with a through hole to communicate the pre-mixing chamber 11 with the combustion chamber 21, an annular groove is provided at an inlet end of the speed-increasing channel 22, a flow-equalizing plate 8 is provided in the annular groove, the flow-equalizing plate 8 is located between the pre-mixing chamber 11 and the combustion chamber 21, the flow-equalizing plate 8 is a plate-shaped structure, and a plurality of flow-equalizing holes 81 are uniformly provided on the flow-equalizing plate 8. The gas mixed by the gas and the air can uniformly enter the combustion chamber 21 for combustion after passing through the flow equalizing plate 8.

Referring to fig. 2, a speed increasing channel 22 is positioned in the burner 2, and a combustion chamber 21 is positioned on the side of the speed increasing channel 22 away from the premixing chamber 11. The cross section of the speed increasing channel 22 is circular, and the diameter of the middle part of the speed increasing channel 22 is smaller than the diameter of the two ends of the speed increasing channel 22. Through setting up acceleration rate passageway 22, not only can further strengthen the mixed effect of air and gas, can increase gas mixture's velocity of flow moreover, avoid 8 edges of flow equalizing plate to make the direct burning flow equalizing plate 8 of flame and the insufficient condition emergence of burning because of the local velocity of flow of gas mixture that the boundary layer effect leads to too slowly to improve the life of combustor. Meanwhile, because the speed increasing channel 22 increases the flow velocity of the mixed gas, a low-pressure area can be formed on one side of the outlet of the speed increasing channel 22, and the high-temperature mixed gas on the upper part can flow back into the low-pressure area, so that the temperature of the low-pressure area is increased, an ignition source is objectively formed, the combustion temperature of the low-pressure area can be increased under the condition of large-flow gas supply, and all combustion areas can be stably and fully combusted.

The side of the combustion chamber 21 remote from the premixing chamber 11 may be further covered with an infrared ceramic plate (not shown), which is provided with a plurality of air outlets. The thermal efficiency of the premixing burner can be improved by arranging the infrared ceramic plate, and the energy-saving effect is achieved.

The premixing burner provided by the application can further comprise an ignition device, the ignition device can be an existing ignition needle in the prior art or other ignition equipment for a gas cooker, and the ignition device can be fixedly arranged outside the premixing shell 1 or the cooking range 2. The structure and the arrangement position of the ignition device can be selected by those skilled in the art according to the needs, and are not limited in particular.

The operating principle of the premix burner provided by the application is as follows:

in the working process, the fuel gas is sprayed in through the fuel gas spray head 3 and then sequentially enters the premixing chamber 11 through the second spray cap 5 and the first spray cap 4. Air enters a space between the premixing shell 1 and the first spraying cap 4 through the air inlet 12 under the action of an external air blowing device, and the air deflector 6 plays a role in guiding the air. The air flows through the swirl vanes 7, is mixed with the fuel gas and enters the combustion chamber 21 for combustion through the flow equalizing plate 8 and the speed increasing channel 22. When the combustion chamber 21 is covered with an infrared ceramic plate, the combustion process is performed in the infrared ceramic plate.

The premixing burner provided by the application can realize premixing of gas and air, and improves the combustion effect; by arranging the air deflector 6, the stability of supplied air is improved, and the combustion can be more stable; the arrangement of the swirl vanes 7 can ensure that air flows directionally and stably, and the effect of mixing the air and the fuel gas is improved; through setting up acceleration rate passageway 22, can improve the speed that the mist flows, not only improve the mixed effect of air and gas, improve equipment life-span, can stabilize abundant burning under the condition of large-traffic air feed moreover, have energy-conserving, the effect of environmental protection.

The above is a preferred embodiment of the present application, and the scope of protection of the present application is not limited by the above, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A premix burner, characterized by comprising: the cooking range comprises a premixing shell (1) and a cooking range (2), wherein the cooking range (2) is arranged above the premixing shell (1), a premixing chamber (11) is formed in the premixing shell (1), and a combustion chamber (21) is formed in the cooking range (2);

a gas nozzle (3) is arranged at the bottom of the premixing shell (1), a first nozzle cap (4) is covered outside the gas nozzle (3), and a first vent hole (42) is formed in the upper part of the side wall of the first nozzle cap (4); an air inlet (12) is formed in the lower portion of the side wall of the premixing shell (1);

a speed-increasing channel (22) is formed in the cooking range (2), the speed-increasing channel (22) is communicated with the premixing chamber (11) and the combustion chamber (21), and the diameters of openings at two ends of the speed-increasing channel (22) are larger than that of the middle part of the cooking range.

2. The premix burner according to claim 1, wherein a plurality of swirl vanes (7) are disposed between the side wall of the first nozzle cap (4) and the side wall of the premix housing (1), the swirl vanes (7) are located below the first vent holes (42), and the plurality of swirl vanes (7) are inclined at the same angle in the same direction along the circumferential direction of the first nozzle cap (4).

3. The premix burner according to claim 2, wherein an air deflector (6) is disposed between the side wall of the premix housing (1) and the lower portion of the side wall of the first nozzle cap (4), the air deflector (6) is disposed near the air inlet (12), and the air deflector (6) is located below the swirl vanes (7).

4. The premix burner as in claim 3, wherein the height of said air deflector (6) is equal to or greater than the height of said air intake (12).

5. The premix burner as claimed in claim 3, wherein the air guide direction of said air guide plate (6) is the same as the inclination direction of said swirl vanes (7).

6. The premix burner according to claim 1, wherein a second spray cap (5) is arranged inside the first spray cap (4), the second spray cap (5) covers the outside of the gas nozzle (3), and a second vent hole (52) is arranged at the upper part of the side wall of the second spray cap (5).

7. The premix burner as claimed in claim 1, wherein a flow equalizing plate (8) is arranged between the premix chamber (11) and the combustion chamber (21), and a plurality of flow equalizing holes (81) are arranged on the flow equalizing plate (8).

8. The premix burner as claimed in claim 1, wherein an end of the combustion chamber (21) remote from the premix chamber (11) is covered with an infrared ceramic plate, and a plurality of air outlets are uniformly distributed on the infrared ceramic plate.

9. The premix burner of claim 1, further comprising an ignition device.