Single-pass combustor

Abstract

The application discloses a single-channel burner, which comprises a burner head body and a fire cover, one end of the burner head body is provided with a flow guide pipe, the other end of the burner head body is provided with a base, an installation cavity is formed in the base, the fire cover is provided with an inner ring and a top ring, the top ring is fixedly connected to the top outer circumferential edge of the inner ring, the bottom end of the top ring is provided with a plurality of combustion grooves which are distributed at intervals around the central axis of the top ring, the inner ring extends into the installation cavity so that the top ring covers the top end of the installation cavity, the bottom end of the inner ring extends out of the bottom wall of the installation cavity and is fixed, the outer wall of the inner ring and the inner wall of the installation cavity are spaced apart to form an annular flow guide groove, and the annular flow guide groove is in communication with the outlet end of the flow guide pipe. The single-channel burner can form the annular flow guide groove between the inner ring and the inner wall of the installation cavity, the gas is guided to the plurality of combustion grooves through the annular flow guide groove, single-channel guidance is realized, and the gas pressure is stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of burners, in particular to a single-channel burner. BACKGROUND

[0002] With the large use of natural gas and liquefied petroleum gas, gas stoves have entered the families of urban residents and restaurants. The existing gas stove burners generally include a flow guide pipe and a fire cover seat. The gas is introduced into the fire cover seat through the flow guide pipe and is combusted in cooperation with the fire cover. However, the existing gas burners are generally two-way channels, so that a part of the gas is guided to the outer combustion groove for combustion, and another part of the gas is combusted through the middle combustion groove, which leads to the dispersion of the gas and the instability of the gas pressure, resulting in the jumping of the flame. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide a single-channel burner, which can form an annular flow guide groove between the inner wall of the mounting cavity and the inner circle, guide the gas to the plurality of combustion grooves through the annular flow guide groove, and guide the gas in a single channel, so that the gas pressure is stable.

[0004] The purpose of the present application is achieved by adopting the following technical solutions:

[0005] The single-channel burner comprises a burner body and a fire cover. One end of the burner body is provided with a flow guide pipe, and the other end of the burner body is provided with a base. The base is formed into a mounting cavity. The fire cover is provided with an inner circle and a top circle. The top circle is fixedly connected to the top outer circumferential edge of the inner circle. The bottom end of the top circle is provided with a plurality of combustion grooves, which are distributed around the central axis of the top circle. The inner circle extends into the mounting cavity, so that the top circle covers the top end of the mounting cavity. The bottom end of the inner circle extends out of the bottom wall of the mounting cavity and is fixed. The outer wall of the inner circle and the inner wall of the mounting cavity are spaced apart to form an annular flow guide groove. The annular flow guide groove is in communication with the outlet end of the flow guide pipe.

[0006] Further, the inner wall of the annular flow guide groove is provided with a flow guide surface. One end of the flow guide surface is connected to the outlet end of the flow guide pipe. The other end of the flow guide surface extends from the bottom to the top along the inner wall of the annular flow guide groove in a spiral shape.

[0007] Further, the bottom wall of the side of the annular flow guide groove close to the flow guide pipe is gradually inclined from the top to the bottom and away from the flow guide pipe.

[0008] Further, the inlet end of the flow guide pipe is flat. The inner diameter of the inlet end of the flow guide pipe gradually decreases from the end close to the fire cover seat to the end away from the fire cover seat.

[0009] Further, the top end of the base is provided with a fire cover seat, the fire cover seat is fixed to the top end of the mounting cavity; the top end surface of the fire cover seat is provided with a backflow groove, the backflow groove extends along the circumference of the fire cover seat; a plurality of backflow openings are arranged on the outer side wall of the backflow groove; the plurality of backflow openings are circumferentially and interval distributed around the central axis of the fire cover seat; the backflow openings extend along the circumference of the fire cover seat; the inner side of the fire cover seat is provided with a flow guide opening, the flow guide opening is through the backflow groove; the fire cover is covered on the fire cover seat; the bottom end of the combustion groove is through the backflow groove; the outer side of the combustion groove is through to the outer side surface of the fire cover; the inner side of the combustion groove is through to the annular flow guide groove.

[0010] Further, the combustion groove gradually inclines towards the backflow groove from top to bottom.

[0011] Further, the top end of the top ring is outwardly convex to form a convex part; the convex part is convex to the outer side of the combustion groove.

[0012] Further, in the two adjacent combustion grooves, the height of one combustion groove is greater than that of the other combustion groove.

[0013] Further, in the two adjacent combustion grooves, the combustion groove with greater height is the first combustion groove, and the combustion groove with lower height is the second combustion groove; the bottom end surface of the top ring is formed as a guide inclined surface, and the top end of the first combustion groove and the second combustion groove is through to the guide inclined surface.

[0014] Further, the outer side of the first combustion groove extends to the outer side edge of the top ring through a first backflow surface; a second backflow surface is arranged between the two adjacent first combustion grooves, and the second combustion groove is arranged at the bottom end of the second backflow surface.

[0015] Compared with the prior art, the beneficial effects of the present application are that: the inner ring of the fire cover is arranged in the mounting cavity of the base, and the outer wall of the inner ring and the inner wall of the mounting cavity are spaced to form an annular flow guide groove, and the bottom end of the inner ring extends from the bottom end of the mounting cavity, so that the gas introduced by the flow guide pipe flows in the annular flow guide groove to each combustion groove, and the middle part of the fire cover is not introduced by the gas, forming a single-channel gas flow guide structure, single-channel guiding, and stable gas pressure. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present application;

[0017] Figure 2 It is a partial sectional view of the present application;

[0018] Figure 3 It is a structural schematic diagram of the fire cover seat of the present application;

[0019] Figure 4 It is a structural schematic diagram of the fire cover of the present application;

[0020] Figure 5 It is a structural schematic diagram of the burner body of the present invention.

[0021] In the figure: 10, fire cover seat; 11, return groove; 12, return port; 13, drainage port; 14, slot; 20, fire cover; 21, first combustion groove; 22, second combustion groove; 23, protrusion; 24, first return surface; 25, second return surface; 26, inner ring; 27, top ring; 30, burner body; 31, drainage pipe; 32, base; 321, annular drainage groove; 322, drainage surface. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0023] like Figures 1-5 The single-channel burner shown includes a burner body 30 and a fire cover 20. A drainage tube 31 is provided at one end of the burner body 30, and a base 32 is provided at the other end. The base 32 defines a mounting cavity. Specifically, the fire cover 20 includes an inner ring 26 and a top ring 27, which is secured to the top outer circumference of the inner ring 26. The bottom end of the top ring 27 is provided with a plurality of combustion grooves spaced circumferentially around the central axis of the top ring 27. During assembly, the inner ring 26 extends into the mounting cavity, sealing the top end of the mounting cavity. The bottom end of the inner ring 26 extends from the bottom wall of the mounting cavity and is secured thereto. The outer wall of the inner ring 26 and the inner wall of the mounting cavity form an annular drainage groove 321, which communicates with the outlet end of the drainage tube 31.

[0024] On the basis of the above structure, when using the single-channel burner of the present invention, the inner ring 26 of the fire cover 20 can be extended into the installation cavity in the base 32 of the burner body 30, and the bottom end of the installation cavity can form a through-interface, and the bottom end of the inner ring 26 directly passes through the through-interface. The fire cover 20 can be assembled on the base 32 of the burner body 30, and the outer wall of the inner ring 26 can form the above-mentioned annular drainage groove 321 with the inner wall of the installation cavity.

[0025] During use, the gas can be guided into the annular diversion groove 321 through the diversion groove of the burner body 30. The annular diversion groove 321 can guide the gas to be distributed in an annular direction around the fire cover 20. The gas introduced by the diversion pipe 31 flows into each combustion groove through the annular diversion groove 321, while no gas is introduced into the middle part of the fire cover 20, forming a single-channel gas diversion structure. With single-channel guidance, the gas pressure is stable.

[0026] Further, the inner wall of the annular flow channel 321 can be provided with a flow guide surface 322, one end of the flow guide surface 322 being connected to the outlet end of the flow guide pipe 31, and the other end of the flow guide surface 322 extending upward along the inner wall of the annular flow channel 321 in a spiral shape. Specifically, the flow guide surface 322 can be provided on the inner wall of the mounting cavity.

[0027] In this way, when the gas is introduced into the annular flow channel 321 through the flow guide pipe 31, the flow guide surface 322 can guide the gas at the outlet end of the flow guide pipe 31 to rise upward in a spiral direction. The gas flow in the spiral direction has small flow resistance and high flow speed, so that the gas can be distributed to all positions in the annular flow channel 321 quickly, and the gas pressure is uniformly distributed on the front and back sides and the upper and lower ends of the fire cap seat 10, so that the combustion process is stable and the flame is uniformly distributed. At the same time, the gas mixture can be sprayed at a high speed, and the ignition speed of the burner is improved.

[0028] Further, the bottom wall of the annular flow channel 321 near the flow guide pipe 31 is inclined downward away from the flow guide pipe 31. That is, the bottom end of the base 32 is arranged in an inclined state. In this way, in cooperation with the flow guide surface 322 on the inner wall of the annular flow channel 321, the gas flows upward along the bottom wall to the other side of the annular flow channel 321, and the gas pressure on the front and back sides of the fire cap seat 10 is more uniform.

[0029] Further, the flow guide surface 322 can be provided on both sides of the annular flow channel 321 near the flow guide pipe 31. The flow guide surface 322 can make the gas rise upward in a spiral direction from both sides, so that the gas flow speed is relatively fast, and the gas can be distributed in the annular flow channel 321 quickly, the ignition speed is improved, and the gas distribution is more uniform.

[0030] Further, the inlet end of the flow guide pipe 31 is flat, and the inner diameter of the inlet end of the flow guide pipe 31 gradually decreases from the end near the base 32 to the end away from the base 32. In this way, the incident gas flow at the outlet of the fire cap 20 has high pressure, and the gas mixture can be sprayed at a high speed.

[0031] More specifically, the inlet end of the flow guide pipe 31 can be provided with a flow guide hole, which can guide the liquid accumulated in the bottom of the burner body 30 to flow out, so as to prevent the liquid accumulated in the bottom of the burner body 30 from affecting the entraining performance of the burner body 30.

[0032] Further, the flow guide pipe 31 can be provided with first mounting pieces on both sides, and the first mounting pieces can be provided with first mounting holes. In this way, screws can be inserted into the first mounting holes on both sides to fix the flow guide pipe 31 of the burner body 30 to the stove.

[0033] Similarly, the second mounting piece is arranged on the outer surface of the base 32, and a second mounting hole is arranged on the second mounting piece. A screw is inserted into the second mounting hole to fix the base 32 on the cooking head, and the base 32 is convenient to disassemble and assemble.

[0034] In the embodiment, the fire cap seat 10 is arranged on the top end of the base 32. The fire cap seat 10 is fixed on the top end of the mounting cavity. A backflow groove 11 is arranged on the top end surface of the fire cap seat 10. The backflow groove 11 extends along the circumference of the fire cap seat 10. A plurality of backflow openings 12 are arranged on the outer side wall of the backflow groove 11. The plurality of backflow openings 12 are distributed at intervals along the circumferential direction of the central axis of the fire cap seat 10, and the backflow openings 12 extend along the circumferential direction of the fire cap seat 10.

[0035] In addition, a drainage opening 13 is arranged on the inner side of the fire cap seat 10. The drainage opening 13 is communicated with the backflow groove 11. The fire cap 20 is capped on the fire cap seat 10. The bottom end of the combustion groove is communicated with the backflow groove 11. The outer side of the combustion groove is communicated to the outer side surface of the fire cap 20. The inner side of the combustion groove is communicated with the annular drainage groove 321.

[0036] On the basis of the structure, when assembling, the bottom end of the fire cap seat 10 is inserted into the bottom end of the mounting cavity. The outer wall of the fire cap seat 10 is fixed on the top end outer wall of the mounting cavity. Then, the fire cap 20 is capped on the fire cap seat 10. The top ring 27 of the fire cap 20 can be capped on the top end of the mounting cavity. The bottom end of the top end of each combustion groove can be capped on the backflow groove 11. Each combustion groove is communicated to the side surface of the fire cap 20. Each combustion groove has the backflow opening 12 below it. When burning, part of the gas in the base 32 of the cooking head body 30 can directly flow into the combustion groove of the fire cap 20 to burn. Part of the gas can enter the backflow groove 11 through the drainage opening 13 on the fire cap seat 10. The gas in the backflow groove 11 can flow through each backflow opening 12 and flow back to each combustion groove through the outer side of the combustion groove. This prevents the flame from jumping or going out due to insufficient or uneven gas in the combustion groove. Thus, the flame is stable.

[0037] Further, the combustion groove gradually inclines towards the backflow groove 11 from top to bottom. The inclined combustion groove can guide the gas to flow outward from bottom to top. This facilitates the rapid flow of gas and improves the ignition efficiency. At the same time, the gas discharged from the combustion groove can also be guided to flow back to the backflow groove 11 through the inclined combustion groove. This improves the utilization rate of gas and the stability of the flame.

[0038] Further, a clamping block can be arranged on the inner wall of the annular drainage groove 321. A clamping groove 14 is arranged on the outer side of the fire cap seat 10. The opening of the clamping groove 14 is communicated with the surface of the fire cap seat 10. When the fire cap seat 10 is assembled with the base 32, the clamping block is clamped in the clamping groove 14. Thus, the fire cap seat 10 and the cooking head body 30 can be detachably assembled.

[0039] Further, the top end outer periphery of the top ring 27 of the fire cap 20 is outwardly convex to form a convex portion 23 which protrudes outward of the combustion groove. In this way, after the gas is introduced into the plurality of combustion grooves of the fire cap 20, the combustion flame appears in the combustion groove, and the convex portion 23 protruding around the periphery of the top ring 27 is distributed outward of the top end of each combustion groove, so that the convex portion 23 can block the direct contact surface of the combustion groove and the air, reduce the amount of air mixed into the combustion groove, and at the same time, press the combustion flame in the combustion groove to prevent the flame from being extinguished during combustion, and the flame is stable during combustion.

[0040] It should be noted that the convex portion 23 can be realized by a convex structure processed on the outer periphery of the top ring 27.

[0041] Further, the height of one of the two adjacent combustion grooves is greater than that of the other combustion groove, and during combustion, the combustion grooves with different heights are staggered at the bottom end of the body of the fire cap 20. Specifically, the combustion groove with a higher height in the two adjacent combustion grooves is the first combustion groove 21, and the combustion groove with a lower height in the two adjacent combustion grooves is the second combustion groove 22. During combustion, the flame height in the first combustion groove 21 is higher than that in the second combustion groove 22, and the long flame in the first combustion groove 21 can ensure the flame height and improve the combustion efficiency, while the short flame in the second combustion groove 22 is stable and does not extinguish during combustion, and can ignite in time when the flame in the first combustion groove 21 is extinguished, so that the flame in the adjacent first combustion groove 21 is stable. Therefore, it can not only prevent the flame from being extinguished during combustion and stabilize the combustion process, but also ensure the flame temperature and improve the combustion efficiency.

[0042] Further, the bottom end surface of the top ring 27 is formed as a guide slope, and the top end of the first combustion groove 21 and the second combustion groove 22 in the two adjacent combustion grooves penetrates to the guide slope. The guide slope can guide the gas in the fire cap seat 10 from bottom to top, has a certain flow guiding effect, and makes the combustion more sufficient.

[0043] Further, the outer side of the first combustion groove 21 extends to the outer side edge of the top ring 27 through the first backflow surface 24, and the gas not completely combusted in the first combustion groove 21 can be guided to backflow through the first backflow surface 24, further improving the combustion efficiency. Specifically, the first backflow surface 24 can be a circular arc surface, which prolongs the travel distance of the gas and has higher combustion efficiency.

[0044] Further, a second return surface 25 is arranged between two adjacent first combustion slots 21, and the second combustion slot 22 is arranged at the bottom end of the second return surface 25. In this way, the unburned gas of the first combustion slots 21 on both sides of the second return surface 25 can also be guided to flow back to the second combustion slot 22 at the bottom end of the second return surface 25 for combustion, further improving the combustion efficiency, and reducing the contact of the gas with the external air, further improving the anti-fireout performance.

[0045] For those skilled in the art, other various corresponding changes and modifications can be made to the above-described technical solutions and concepts, and all these changes and modifications shall belong to the protection scope of the claims of the present application.

Claims

1. Single channel burner, including burner body and fire cover, characterized in that: A drainage tube is provided at one end of the burner body, and a base is provided at the other end of the burner body; a mounting cavity is formed in the base; the fire cover is provided with an inner ring and a top ring, and the top ring is fixed to the outer peripheral edge of the top of the inner ring; a plurality of combustion grooves are provided at the bottom end of the top ring, and the plurality of combustion grooves are distributed at intervals around the central axis of the top ring; the inner ring extends into the mounting cavity so that the top ring is sealed to the top end of the mounting cavity; the bottom end of the inner ring extends out from and is fixed to the bottom wall of the mounting cavity, and the outer wall of the inner ring and the inner wall of the mounting cavity are spaced apart to form an annular drainage groove; the annular drainage groove is connected to the outlet end of the drainage tube; the top of the base A fire cover seat is provided at the end, and the fire cover seat is fixed to the top of the installation cavity; a reflow groove is provided on the top surface of the fire cover seat, and the reflow groove extends along the circumference of the fire cover seat; a plurality of reflow ports are provided on the outer wall of the reflow groove; a plurality of reflow ports are distributed at intervals around the circumference of the central axis of the fire cover seat; the reflow ports extend along the circumference of the fire cover seat; a drainage port is provided on the inner side of the fire cover seat, and the drainage port is connected with the reflow groove; the fire cover is sealed on the fire cover seat; the bottom end of the combustion groove is connected with the reflow groove; the outer side of the combustion groove is connected to the outer side surface of the fire cover; the inner side of the combustion groove is connected with the annular drainage groove.

2. The single-channel burner according to claim 1, characterized in that A drainage surface is provided on the inner wall of the annular drainage groove, one end of the drainage surface is connected to the outlet end of the drainage pipe; the other end of the drainage surface extends spirally from bottom to top along the inner wall of the annular drainage groove.

3. The single-channel burner according to claim 1, characterized in that The bottom wall of the annular drainage groove on the side close to the drainage pipe is gradually inclined from top to bottom toward the side away from the drainage pipe.

4. The single-channel burner according to claim 1, characterized in that The inlet end of the drainage tube is flat; the inner diameter of the inlet end of the drainage tube gradually decreases from the end close to the base to the end far away from the base.

5. The single-channel burner according to claim 1, characterized in that The combustion groove is gradually inclined toward the reflow groove from top to bottom.

6. The single-channel burner according to any one of claims 1 to 5, characterized in that: The outer periphery of the top end of the top ring protrudes outward to form a protruding portion; the protruding portion protrudes outside the combustion groove.

7. The single-channel burner according to any one of claims 1 to 5, characterized in that: Among two adjacent combustion grooves, the height of one combustion groove is greater than the height of the other combustion groove.

8. The single-channel burner according to claim 7, characterized in that The combustion groove with a higher height among the two adjacent combustion grooves is the first combustion groove, and the combustion groove with a lower height among the two adjacent combustion grooves is the second combustion groove; the bottom end surface of the top ring is formed as a guide slope, and the top ends of the first combustion groove and the second combustion groove pass through the guide slope.

9. The single-channel burner according to claim 8, characterized in that The outer side of the first combustion groove extends to the outer edge of the top ring through the first return surface; a second return surface is provided between two adjacent first combustion grooves, and the second combustion groove is provided at the bottom end of the second return surface.

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