Patent Application
20240337379
The present invention pertains to the field of burners, and specifically pertains to a vortex pressurized burner.
As one of the mainstream heating devices, the gas burner is usually arranged in gas stoves, ovens and other devices. For conventional gas burners, refer to BURNER OF GAS STOVE disclosed in U.S. Patent Application Publication No. 20220221147 A1, which adopts a gas inlet conduit to introduce gas into circular gas passages and then jets out the gas from gas outlets in the circular gas passages, so that the jetted gas is ignited to generate flames.
The disadvantage of the above structure is that because the flame generated by combustion at the gas outlet near the gas inlet conduit is large due to a high gas pressure and a high speed of the jetted gas whereas the flame generated by combustion at the gas outlet far from the gas inlet conduit is small due to a low gas pressure and a low speed of the jetted gas, the flame uniformity is poor.
In view of the defect of the prior art, an objective of the present invention is to provide a vortex pressurized burner, which adopts a gradually reduced volute flow passage to make a pressure difference of the volute flow passage from a gas passage head end to a gas passage tail end smaller, so that the jetted gas is more uniform, increasing the uniformity of circumferential combustion of flames.
In order to achieve the above objective, the present invention provides the following technical solution: The vortex pressurized burner includes: a burner body, provided with a volute flow passage and a plurality of gas outlet passages; wherein the volute flow passage is provided with a gas passage head end and a gas passage tail end, and the gas passage tail end is cut off, so that a gas flow entering the volute flow passage via the gas passage head end can be stopped at the gas passage tail end from entering the gas passage head end, and the cross-sectional shape of the volute flow passage is gradually reduced from the gas passage head end to the gas passage tail end; and all of the plurality of gas outlet passages are arranged along an extending direction of the volute flow passage to form an annular gas outlet area, and each of the gas outlet passages communicates with the volute flow passage.
Further, the annular gas outlet area is arranged at the volute center of the volute flow passage, and is gradually reduced from bottom to top.
Further, each of the gas outlet passages is formed by spirally extending along an inclined direction of the annular gas outlet area, so that a gas outlet of each of the gas outlet passages is located at an upper port of the annular gas outlet area.
Further, the cross-sectional shape of each of the gas outlet passages is gradually reduced from a gas inlet to gas outlet of the gas outlet passage; and/or the cross-sectional shape of the volute flow passage is gradually reduced from the lower end to the upper end thereof.
Further, an included angle between the axis of an extending direction of each of the gas outlet passages and the volute axis of the volute flow passage is an acute angle.
Further, the gas outlets of all the gas outlet passages are arranged in the inner wall of the upper port of the annular gas outlet area in an annular or volute form; the burner body includes a volute portion, wherein the inner circumference of the volute portion is provided with a clear cavity, and the annular gas outlet area is formed by being continuously arranged along the edge of an upper port of the clear cavity; the burner body is provided with a gradually reduced upward protective section located over the annular gas outlet area, and the upper end of the protective section circumferentially defines a flame outlet.
Further, the vortex pressurized burner further includes a flame-gathering cover sleeved on the upper end of the annular gas outlet area, wherein the inner circumference of the flame-gathering cover is cylindrical, or the inner circumference of the flame-gathering cover is shaped like a truncated cone which is gradually reduced upwards.
Further, the circumferential wall of the flame-gathering cover is provided with a plurality of air supply holes through which the inside of the flame-gathering cover communicates with the outside, wherein the plurality of air supply holes are arranged at intervals along a circumferential direction of the flame-gathering cover, and/or the air supply holes are inclined upwards along a direction from the gas passage head end to the gas passage tail end of the volute flow passage.
Further, the volute flow passage is provided with an inner flow passage wall and an outer flow passage wall, wherein the inner flow passage wall is annularly arranged, the outer flow passage wall is located at the periphery of the inner flow passage wall, the outer flow passage wall gradually approaches the inner flow passage wall from the gas passage head end to the gas passage tail end, and the gas outlet passages are arranged at intervals on the top of the inner flow passage wall along a circumferential direction of the inner flow passage wall; the volute flow passage is provided with an upper flow passage wall and a flow-increasing sidewall, wherein the upper flow passage wall is inclined upwards from one side of the outer flow passage wall to one side of the inner flow passage wall, the flow-increasing sidewall is arranged at one end of the gas passage tail end, and is located between the upper flow passage wall and the outer flow passage wall, and the flow-increasing sidewall is arranged in an outwardly arched arc shape.
Further, an injection passage is arranged in the burner body, wherein one end of the injection passage is connected with the gas passage head end, and an extending direction of the injection passage is arranged tangent to the extending direction of the volute flow passage; and a distance between the injection passage and the volute center of the volute flow passage is s (8 mm≤s≤12 mm).
By adopting the above technical solution, the present invention has the following advantages:
As shown in
The gas enters the volute flow passage 2 from the gas passage head end 21, and flows to the gas passage tail end 22 under the guidance of a one-way extending flow passage structure of the volute flow passage 2. In addition, the gas flowing through each position of the volute flow passage 2 is jetted out through the corresponding gas outlet passage 3, and the jetted gas is ignited to combust to generate flames. In addition, since the volute flow passage 2 is gradually reduced from the gas passage head end 21 to the gas passage tail end 22, the pressure diverted by the volute flow passage 2 from the gas outlet passages 3 is compensated, making the pressure in the volute flow passage 2 more uniform and minimizing the pressure difference between the gas passage head end 21 and the gas passage tail end 22, so that the gas flowing out of all the gas outlet passages 3 is kept at close pressures, and consequently, the gas in all the gas outlet passages 3 is jetted out at close speeds and ignited to generate more uniform flames at all the gas outlet passages 3. In addition, since the gas passage tail end 22 and the gas passage head end 21 are cut off, the gas in the volute flow passage 2 can only flow in a one-way manner, so as to prevent the gas flow at the gas passage tail end 22 from flowing to the gas passage head end 21 without passing through the volute flow passage 2 or the gas flow at the gas passage head end 21 from reversely flowing into the gas passage tail end 22 without passing through the volute flow passage 2 to cause the gas pressure at the gas passage tail end 22 to decrease to affect the intensity of flames.
In other embodiments, only part of the volute flow passage 2 is gradually reduced, while the other part only needs to be adaptively set due to the limitation of the structure of the burner body 1 itself.
In other embodiments, the gas outlet passage 3 may be set in any structure, and the number of the gas outlet passages 3 may be set or adjusted according to actual conditions, and is not limited by the number disclosed in the present invention.
Preferably, as shown in
Preferably, the shape of the gas outlet passage 3 in the present embodiment is gradually reduced from one end close to the volute flow passage 2 to one end far from the volute flow passage 2, so that the gas from the volute flow passage 2 is further pressurized in the gradually reduced gas outlet passage 3 to jet out at a higher speed, increasing the intensity of flames. Specifically, the overall shape of the gas outlet passage 3 is trapezoidal.
Preferably, the cross-sectional shape of the volute flow passage 2 in the present embodiment is gradually reduced from the lower end to the upper end thereof, so that the flow of the gas in the volute flow passage 2 is larger, and the effect of increasing the speed of the gas in a constricting manner is achieved when the gas upwardly enters the gas outlet passages 3, so the gas jetting effect is better.
The number of turns of the volute flow passage 2 in the present embodiment is one, so as to optimally adapt to the gas outlet passages 3 arranged annularly. In addition, in other embodiments, the number of turns of the volute flow passage 2 may be set to be less than one, so that the gas outlet passages 3 can only be arranged in part of the area, or the number of turns of the volute flow passage 2 may be set to be greater than one, adoptively, the gas outlet passages 3 need to be arranged in a volute form for more than one turn as well, so as to optimally adapt to the volute flow passage 2 for jetted gas combustion.
The annular gas outlet area 5 is arranged at the volute center of the volute flow passage 2, and is gradually reduced from bottom to top. In addition, each gas outlet passage 3 is formed by spirally extending along an inclined direction of the annular gas outlet area 5, and each gas outlet 31 is located at an upper port of the annular gas outlet area 5, so that the gas outlet passages 3 are close to the volute center of the volute flow passage 2 along a direction away from the volute flow passage 2. In addition, the gas outlet passages 3 are inclined upwards along a direction away from the volute flow passage 2, so that all the gas outlet passages 3 are inclined upwards while converging with one another.
Therefore, the gas in the volute flow passage 2 is re-rotated for the first time under the guidance of the volute flow passage 2 and re-rotated for the second time under the action of the gas outlet passages 3, and the gas which is re-rotated for the second time tends to spiral upwards and inwards, so that the gas jetted out from the gas outlet passages 3 is ignited to generate spiral flames that contract inwards and the spiral flames generated by the combination of all the gas outlet passages 3 join together to form a spiral column-like flame which contracts upwards and inwards, making the flames more concentrated and realizing the supply of a rotating flame.
In other embodiments, the gas outlet passages 3 may be horizontally inclined, and the horizontal inclination direction may be close to or far away from the volute center.
In other embodiments, the gas outlet passages 3 may also be vertically inclined.
In the present embodiment, all the gas outlets 31 are equidistantly arranged in an annular form. Therefore, the annularly arranged gas outlets 31 are arranged more orderly, and under the effect of equidistant arrangement, all the gas outlets 31 are combined to generate a more uniform circumferential flame, increasing the flame quality.
In addition, the burner body 1 includes a volute portion 11, and the inner circumference of the volute portion 11 is provided with a clear cavity 111, and the annular gas outlet area 5 is formed by being continuously arranging along the edge of an upper port of the clear cavity 111. Therefore, the space inside the clear cavity 111 enables the flames to be more smoothly jetted out from the gas outlets 31, and the flames jetted out from the gas outlets 31 are inward and spiral upwards, so that the flames at all the circumferential gas outlets 31 can converge more quickly and smoothly.
In addition, the volute portion 11 is provided with a gradually reduced upward protective section 112 located over the gas outlets 31, and the upper end of the protective section 112 circumferentially defines a flame outlet 1121. Therefore, under the action of the protective section 112, not only can garbage falling from above the flame outlet 1121 into the clear cavity 111 be prevented from approaching the gas outlets 31 and being sintered to block the gas outlets 31, but also the protective section 112 has a certain ability to converge the flames due to necking in the same direction as the spiral direction of the flames.
In other embodiments, the gas outlets 31 may be arranged in a volute form corresponding to the volute flow passage 2.
In addition, the present embodiment also includes a flame-gathering cover 4 sleeved on the upper end of the annular gas outlet area 5. The inner circumference and outer circumference of the flame-gathering cover 4 are both shaped like truncated cones, with the diameter of the upper end being small and the diameter of the lower end being large, so that the flame-gathering cover 4 is shaped like a truncated cone which is hollow inside. The diameter of the lower end of the flame-gathering cover 4 is larger than that of the flame outlet 1121, and the diameter of the upper end of the flame-gathering cover 4 is smaller than that of the flame outlet 1121. The lower end of the flame-gathering cover 4 abuts against the peripheral wall of the volute portion 11 for fixation, and specifically, welding, direct placement, fastening or other methods may be adopted for connection.
Therefore, the flames jetted out from the flame outlet 1121 can contract upwards and inwards under the action of the flame-gathering cover 4 to further converge to form a stronger, more concentrated flame column, thus increasing the flame quality.
It should be noted that the flame-gathering cover 4 may be shaped like a truncated cone or a polygonal frustum.
In other embodiments, both the inner circumference and outer circumference of the flame-gathering cover 4 are cylindrical. It should be noted that the flame-gathering cover 4 may be shaped like a cylinder or a polygonal column.
In addition, the peripheral wall of the flame-gathering cover 4 in the present embodiment is provided with air supply holes 41 through which the inside of the flame-gathering cover 4 communicates with the outside. Consequently, under the action of the air supply holes 41, the air outside the flame-gathering cover 4 can enter the flame-gathering cover 4 under the effect of pressure, so as to replenish or supply oxygen for the flames and gas combusting in the flame-gathering cover 4, so that combustion can be more sufficient.
Preferably, there are a plurality of air supply holes 41, and the air supply holes 41 are arranged at intervals along a circumferential direction of the flame-gathering cover 4, so that oxygen is circumferentially supplied to make combustion more sufficient.
Preferably, the air supply holes 41 are inclined upwards along a direction from the gas passage head end 21 to the gas passage tail end 22 of the volute flow passage 2, so that the space through which the air outside the air supply holes 41 passes through the air supply holes 41 when brought in by the spiral flames inside the flame-gathering cover 4 is more sufficient, so the air can more smoothly enter the flame-gathering cover 4.
In addition, since the lower end of the flame-gathering cover 4 is located on the peripheral wall of the volute portion 11, most of garbage falling on the flame-gathering cover 4 is kept out by the flame-gathering cover 4 and guided to the peripheral wall of the volute portion 11 along the peripheral wall of the flame-gathering cover 4, and therefore cannot enter the clear cavity 111 via the flame outlet 1121. In addition, some small garbage or liquid garbage which enters the flame-gathering cover 4 via the air supply holes 41 can roll down along the inner circumferential wall of the flame-gathering cover 4 to the bottom of the flame-gathering cover 4, so that the interference of the garbage to the gas outlets 31 can be decreased.
Preferably, there is a certain gap between the lower end of the flame-gathering cover 4 and the peripheral wall of the volute portion 11, so that the garbage gathered at the bottom of the flame-gathering cover 4 can be discharged out from the gap, preventing garbage accumulation. It should be noted that this garbage is small garbage or liquid garbage.
Preferably, the protective section 112 in the present embodiment is provided with an outwardly turned arc-shaped flange 1122 located at the flame outlet 1121, so that the arc-shaped flange 1122 further prevents the garbage on the peripheral wall of the volute portion 11 from entering the clear cavity 111 via the flame outlet 1121.
Specifically, the volute flow passage 2 in the present embodiment is provided with an inner flow passage wall 23 and an outer flow passage wall 24. The inner flow passage wall 23 is annularly arranged, and the outer flow passage wall 24 is located at the periphery of the inner flow passage wall 23, and gradually approaches the inner flow passage wall 23 from the gas passage head end 21 to the gas passage tail end 22. Therefore, since the outer flow passage wall 24 gradually approaches the inner flow passage wall 23, a shape, the cross-sectional area of which is gradually reduced, is formed, and since the inner flow passage wall 23 is annular, the shape of the inner flow passage wall 23 is regular, making the structure more orderly.
Preferably, the gas outlet passages 3 are equidistantly arranged over the inner flow passage wall 23 along a circumferential direction of the inner flow passage wall 23, so that the gas outlet passages 3 are arranged adapting to the annular inner flow passage wall 23, making the overall design structure more orderly, and consequently, the flames jetted out from all the gas outlets 31 are more uniform under the condition of stable pressure supply by the corresponding gas outlet passages 3.
In addition, the volute flow passage 2 in the present embodiment is provided with an upper flow passage wall 25 and a flow-increasing sidewall 26.
The upper flow passage wall 25 is inclined upwards from one side of the outer flow passage wall 24 to one side of the inner flow passage wall 23, the inner flow passage wall 23 is correspondingly shaped like a truncated cone which contracts upwards, and the distance between the upper flow passage wall 25 and the inner flow passage wall 23 is gradually reduced inwards along a radial direction, so that the gas which transits from the volute flow passage 2 into the gas outlet passages 3 can be continuously and more smoothly constricted before entering the gas outlet passages 3, reducing the loss of kinetic energy, and is ultimately pressurized and accelerated to enter the gas outlet passages 3.
The flow-increasing sidewall 26 is arranged in an outwardly arched arc shape at one end of the gas passage tail end 22 and is located between the upper flow passage wall 25 and the outer flow passage wall 24, so that the space of the volute flow passage 2 at the gas passage tail end 22 is enlarged by the flow-increasing sidewall 26, allowing the gas passage tail end 22 to have more gas to ensure gas pressure, so as to effectively supply gas to the gas outlet passages 3 at the gas passage tail end 22.
The burner body 1 in the present embodiment includes an injection tube 12 connected with the volute portion 11, and an injection passage 121 is arranged in the injection tube 12. The injection passage 121 is a straight passage as indicated by L1, with one end of the injection passage 121 being connected with the gas passage head end 21. Preferably, an extending direction of the injection passage 121 is the same as a tangential direction of the volute flow passage 2 at the gas passage head end 21. Therefore, when the injection passage 121 is connected to a gas source, the gas source supplies gas to the injection passage 121, and the gas is more smoothly injected into the volute flow passage 2 under the guidance of the injection passage 121, thus reducing the loss of kinetic energy in the process, and ultimately, the jetted flames can have stronger kinetic energy to spirally converge.
A distance between the injection passage 121 and the volute center of the volute flow passage 2 is s (8 mm≤s≤12 mm; specifically, s=10 mm in the present embodiment).
The burner body 1 in the present embodiment includes an upper housing 13 and a lower housing 14, both of which are sheet metal parts and welded into a fixed structure after being put together, so as to ensure the effective sealing of the internal flow passages.
Specifically, the upper housing 13 is provided with an upper flow passage portion 131, the lower housing 14 is provided with a lower flow passage portion 141, and the volute flow passage 2 is formed between the upper flow passage portion 131 and the lower flow passage portion 141. The upper housing 13 is provided with an upper gas outlet portion 132, and the lower housing 14 is provided with a lower gas outlet portion 142. The lower gas outlet portion 142 is provided with a plurality of stamped projections 143 abutting against the upper gas outlet portion 132, and each gas outlet passage 3 is formed between two adjacent stamped projections 143.
Therefore, the structure is simpler, and the production cost is lower.
The main structure of a vortex pressurized burner is the same as that of Embodiment 1, except that the same effect as that of the flame-gathering cover 4 can be achieved by extending the protective section 112, without arranging the flame-gathering cover 4.
Preferably, an air supply opening is arranged in the protective section 112, so that the inside of the clear cavity 111 can communicate with the outside, thus ensuring the sufficient combustion of gas in the clear cavity 111.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202410538502.3 | Apr 2024 | CN | national |
