A premix combustion burner for a turbofan stove

Abstract

The application relates to a premixed combustion split device for a blast supercharged stove. It belongs to the technical field of gas stoves. The application specifically comprises a mixed flow seat, a gas feeding mechanism and a fire transmission combustion mechanism. The mixed flow seat is internally provided with a mixed flow channel. The gas feeding mechanism is arranged at the air inlet end of the mixed flow seat and is used for respectively conveying gas and air from the air inlet end of the mixed flow seat to the mixed flow channel, so that the gas and the air are premixed in the mixed flow channel. The premixed mixed gas flow flows to the fire transmission combustion mechanism. The gas and the air are respectively conveyed from the air inlet end of the mixed flow seat to the mixed flow channel by the gas feeding mechanism, mixed in the mixed flow channel, and then guided to the fire transmission combustion mechanism through the air outlet end of the mixed flow seat. The gas and the air are premixed before entering the fire transmission combustion mechanism, so that the gas and the air are uniformly mixed, the air flow rate is reduced to avoid off-flame or off-fire, and the safety and use performance of the blast supercharged stove are improved.

Description

Technical Field

[0001] This invention relates to the field of gas stove technology, and in particular to a premixed combustion and ignition distribution device for a blower-boosted stove. Background Technology

[0002] With the continuous development of household stove technology, blower-boosted stoves are widely used in home cooking and commercial kitchens because they can force air to the combustion system through a blower, thereby improving combustion efficiency and firepower.

[0003] In the existing technology, the blower-boosting stove relies on an independent blower to force the delivery of primary air, and delivers gas through a separate gas passage and blower-boosted primary air through an independent gas replenishment passage. The two airflows only meet and mix outside the burner outlet of the burner cap.

[0004] On the one hand, the blower forces a large amount of primary air to be supplied, and the airflow velocity in the air channel is extremely high; the gas and air are transported in separate channels and only mix outside the gas outlet of the burner cap. The high-speed airflow directly impacts the root of the flame, and the airflow speed is far greater than the propagation speed of the gas flame. The flame detaches from the burner hole and forms a flame detachment. In severe cases, the flame detaches completely and goes out, and the thermal efficiency of the stove drops significantly. At the same time, there is a safety hazard of gas leakage.

[0005] On the other hand, the two fluids only meet momentarily outside the burner cap, and the mixing time is extremely short. Excessive air and local gas accumulation in some areas lead to problems such as yellow flames, red flames, and excessive carbon monoxide emissions. At the same time, it causes uneven distribution of the heat load of combustion, resulting in a large temperature difference in the bottom of the pot, which affects the cooking performance of the blower-boosted stove and the user experience.

[0006] Therefore, there is an urgent need for a premixed combustion ignition device that can uniformly mix gas and air while reducing air velocity to prevent flame lift-off or flameout. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of the prior art by providing a premixed combustion and flame distribution device for a blower-boosted stove, which enables uniform mixing of gas and air while reducing air velocity to prevent flame lift-off or flame detachment, thereby improving the safety and performance of the blower-boosted stove.

[0008] This invention proposes a premixed combustion and flame distribution device for a blower-boosted stove, comprising a mixing seat, a gas supply mechanism disposed at the gas inlet end of the mixing seat, and a flame transmission and combustion mechanism disposed at the gas outlet end of the mixing seat; the mixing seat is provided with a mixing channel, and the gas and air supplied by the gas supply mechanism are premixed in the mixing channel and then guided to the flame transmission and combustion mechanism, which outputs the mixed gas flow to form a combustion flame.

[0009] Furthermore, the gas delivery mechanism includes a gas ejector pipe and an air ejector pipe arranged radially side by side along the mixing seat. The gas ejector pipe is connected to the middle of the mixing channel to deliver gas to the mixing channel, and the air ejector pipe is connected to the side of the mixing channel to deliver air to the mixing channel.

[0010] Furthermore, the air ejector includes a blower ejector and a natural ejector respectively disposed on both sides of the gas ejector. The blower ejector is connected to a blower to guide blower air to the mixing channel, and the natural ejector is connected to the atmosphere to guide outside air to the mixing channel.

[0011] Furthermore, the mixing seat extends vertically, with the air inlet located at the bottom and the air outlet located at the top. The mixing channel is located between the top and bottom of the mixing seat, so that the gas and air enter from the bottom of the mixing seat, flow from bottom to top through the mixing channel, and then flow out from the top of the mixing seat.

[0012] Furthermore, the mixing channel includes a mixing chamber and a buffer chamber. Along the flow direction of the airflow, the buffer chamber is located downstream of the mixing chamber. The cross-sectional area of ​​the buffer chamber is larger than that of the mixing chamber, so that the flow velocity of the premixed airflow is reduced as it flows from the mixing chamber to the buffer chamber.

[0013] Furthermore, the mixing channel is provided with a wave-shaped guide, which extends axially along the inner wall of the mixing channel to create periodic disturbances to the gas and air mixed airflow, thereby accelerating the premixing of gas and air.

[0014] Furthermore, the mixing channel is provided with an array of protrusions, which are multiple protrusions axially distributed along the inner wall of the mixing channel, used to shear the flowing gas and air mixture to promote uniform mixing of gas and air.

[0015] Furthermore, the outlet end of the buffer cavity is provided with a rectifier plate, and the rectifier plate is provided with a plurality of evenly distributed flow-diverting holes. The flow-diverting holes are used to divide the mixed airflow into multiple low-speed small airflows when the mixed airflow flows out of the buffer cavity.

[0016] Furthermore, the ignition combustion mechanism includes a gas distribution base disposed at the gas outlet end of the mixing seat, an inner ring flame cap disposed at the gas outlet end of the mixing seat, and an outer ring flame cap disposed on the gas distribution base; the inner ring flame cap is provided with a flame outlet hole, which outputs the mixed gas flow to form a central flame; the outer ring flame cap is provided with a gas outlet hole, which outputs the mixed gas flow to form an outer ring flame.

[0017] Furthermore, the outlet end of the mixing seat is provided with an inner ring outlet, which is connected to the inner ring burner cap to deliver the mixed airflow to the inner ring burner cap; the outlet end of the mixing seat is also provided with an outer ring outlet, which is formed outside the inner ring outlet; the gas distribution base is provided with an outlet channel, which connects the outer ring outlet to the outer ring burner cap to guide the mixed airflow to the outer ring burner cap.

[0018] The premixed combustion and ignition distribution device for a blower-boosted stove proposed in this invention has the following benefits:

[0019] (1) This device delivers gas and air from the inlet end of the mixing seat to the mixing channel through the gas delivery mechanism, so that they are mixed in the mixing channel. Then, the mixed gas flow is guided to the flame transmission and combustion mechanism through the outlet end of the mixing seat, so that the gas and air are pre-mixed before entering the flame transmission and combustion mechanism, thereby making the gas and air evenly mixed. At the same time, the air flow rate is reduced to avoid flame lift-off or flame detachment, thereby improving the safety and performance of the blower booster stove.

[0020] (2) When the gas supply mechanism of this device delivers gas and air from the gas inlet end of the mixing seat to the mixing channel, the gas and air enter from the bottom of the mixing seat and flow from bottom to top through the mixing channel, and finally flow out from the top of the mixing seat, thereby extending the mixing path of gas and air, further making the gas and air evenly mixed in the mixing channel, while reducing the air flow rate to avoid flame lift-off or flame detachment, thereby improving the safety and performance of the blower booster stove;

[0021] (3) This device sets the gas ejector tube in the middle of the mixing channel and the air ejector tube in the side of the mixing channel, so that the gas enters from the middle of the mixing channel and the air enters from the side of the mixing channel. The two airflows cross and merge in the mixing channel, which is conducive to the full mixing of gas and air, and at the same time avoids the gas directly impacting the ignition combustion mechanism and causing local high temperature.

[0022] (4) This device sets a blower injection pipe and a natural injection pipe on both sides of the gas injection pipe, so that the blower air and the natural injection air enter from different sides of the mixing channel. It can provide sufficient primary air to improve the combustion intensity when the blower is working, and can automatically supplement air through the natural injection pipe when the blower stops working or the power is insufficient, maintain the basic air-fuel ratio, and avoid problems such as unstable combustion, yellow flame or flameout caused by abnormal blower, thereby improving the combustion stability and safety of the blower booster stove under different working conditions.

[0023] (5) The cross-sectional area of ​​the buffer chamber of this device is larger than that of the mixing chamber. By reducing the airflow velocity through the buffer chamber, the premixed airflow can be effectively prevented from entering the flame transmission and combustion mechanism at an excessively high velocity, which would cause flame lift-off or flame detachment. At the same time, the premixed airflow is further evenly distributed in the buffer chamber, laying the foundation for subsequent entry into the flame transmission and combustion mechanism and the formation of a stable combustion flame, thereby improving the combustion stability and safety of the blower-boosted stove.

[0024] (6) The mixing chamber of this device is equipped with a wave-shaped guide. The periodic undulation structure of the wave-shaped guide creates periodic disturbances to the gas and air mixture flow, causing repeated deflections and eddies in the mixing chamber, thereby increasing the contact area and collision probability between the gas and air, accelerating the premixing process of the gas and air, and making the mixing more thorough and uniform.

[0025] (7) The mixing chamber of this device is provided with an array of protrusions. The array of protrusions forms a shearing effect on the gas and air mixed flow, causing the air flow to be divided, stretched and reorganized in the gaps between the protrusions, generating local turbulence and vortices, thereby promoting the uniform mixing of gas and air and improving the premixing quality.

[0026] (8) This device can further reduce the airflow velocity entering the flame transmission and combustion mechanism by setting a rectifier plate at the outlet of the buffer chamber and setting multiple flow diversion holes on the grid plate, which can effectively avoid flame lift-off or flame drop-off caused by excessive airflow velocity, and make the mixed airflow more evenly distributed in the flame transmission and combustion mechanism, thereby improving the stability and thermal efficiency of combustion, and thus improving the overall combustion performance and safety of the blower pressurized stove.

[0027] (9) This device outputs mixed airflow outward through the flame outlet of the inner ring burner and the air outlet of the outer ring burner to form an inner and outer double ring flame structure. The central flame is concentrated in the center of the stove's combustion area, and the outer ring flame surrounds the central flame. The double ring flames burn together, making the flame coverage wider and the heat distribution more uniform, effectively improving the heating efficiency and combustion stability of the blower-boosted stove.

[0028] (10) Through the ring arrangement of the inner and outer ring air outlets and the flow guiding design of the air outlet channel in the gas distribution base, the premixed airflow output by the mixing seat is orderly divided into inner and outer paths. The two airflows do not interfere with each other and supply air independently, thereby achieving stable combustion of the inner and outer double ring flames, making the flame coverage of the stove wider and the heat distribution more uniform, effectively improving the heating efficiency and combustion stability of the blower pressurized stove. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In these drawings, similar reference numerals are used to denote similar elements.

[0030] Figure 1 This is a schematic diagram of the structure of a premixed combustion and ignition distribution device for a blower-boosting stove according to an embodiment of the present invention;

[0031] Figure 2 An exploded view of the installation of the flame transfer combustion mechanism of a premixed combustion and flame distribution device for a blower-boosting stove at the gas outlet end of the mixing seat, according to an embodiment of the present invention.

[0032] Figure 3 This is a cross-sectional schematic diagram of the mixing seat of a premixed combustion and ignition device for a blower-boosting stove according to an embodiment of the present invention.

[0033] Figure 4 This is a cross-sectional schematic diagram of the mixing seat of a premixed combustion and ignition device for a blower-boosting stove according to an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the structure of a rectifier plate for a premixed combustion and flame distribution device for a blower-boosting stove according to an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the gas distribution base of a premixed combustion ignition device for a blower-boosting stove according to an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the inner ring burner cap of a premixed combustion ignition device for a blower-boosting stove according to an embodiment of the present invention;

[0037] Figure 8 This is a schematic diagram of the outer ring flame cover of a premixed combustion flame distribution device for a blower-boosting stove according to an embodiment of the present invention.

[0038] In the diagram: 1. Mixing seat; 11. Mixing chamber; 111. Wave-shaped guide; 112. Array protrusions; 12. Buffer chamber; 13. Rectifier plate; 131. Diverting flow hole; 14. Inner ring gas outlet; 15. Outer ring gas outlet; 2. Gas delivery mechanism; 21. Gas injection pipe; 22. Blower injection pipe; 23. Natural injection pipe; 24. Blower fan; 3. Flame transmission and combustion mechanism; 31. Gas distribution base; 311. Gas outlet channel; 32. Inner ring burner cap; 321. Flame outlet hole; 33. Outer ring burner cap; 331. Gas outlet hole. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Please see Figures 1 to 8 The present invention provides a premixed combustion and flame distribution device for a blower-boosting stove, comprising a mixing seat 1, a gas supply mechanism 2, and a flame transfer and combustion mechanism 3. The mixing seat 1 is provided with a mixing channel, and the gas supply mechanism 2 is provided at the air inlet end of the mixing seat 1 to deliver gas and air from the air inlet end of the mixing seat 1 to the mixing channel, so that the gas and air are premixed in the mixing channel.

[0041] The ignition combustion mechanism 3 is located at the outlet end of the mixing seat 1. After the gas and air are premixed in the mixing channel, the premixed gas flow is guided from the outlet end of the mixing seat 1 to the ignition combustion mechanism 3, so that the mixed gas flow is output by the ignition combustion mechanism 3 and ignited by the ignition mechanism to form a combustion flame. The ignition mechanism is a well-known technology in the art and will not be described in detail here.

[0042] This application uses a gas delivery mechanism 2 to deliver gas and air from the inlet end of the mixing seat 1 to the mixing channel, where they are mixed. The mixed airflow is then guided to the flame transmission and combustion mechanism 3 through the outlet end of the mixing seat 1, so that the gas and air are pre-mixed before entering the flame transmission and combustion mechanism 3. This ensures that the gas and air are mixed evenly, while reducing the airflow velocity to prevent flame lift-off or flame detachment, thereby improving the safety and performance of the blower-boosted stove.

[0043] Specifically, in this embodiment, the mixing seat 1 is a vertically extending cylindrical structure, and the air inlet end of the mixing seat 1 is located at the bottom of the mixing seat 1, the air outlet end is located at the top of the mixing seat 1, and the mixing channel is located between the top and bottom of the mixing seat 1.

[0044] When the gas supply mechanism 2 delivers gas and air from the gas inlet end of the mixing seat 1 to the mixing channel, the gas and air enter from the bottom of the mixing seat 1, flow from bottom to top through the mixing channel, and finally flow out from the top of the mixing seat 1. This prolongs the mixing path of the gas and air, further making the gas and air evenly mixed in the mixing channel, while reducing the air flow rate to avoid flame lift-off or flame detachment, thereby improving the safety and performance of the blower-boosted stove.

[0045] Specifically, in this embodiment, the gas delivery mechanism 2 includes a gas ejector pipe 21 and an air ejector pipe arranged radially side by side along the mixing seat 1. The gas ejector pipe 21 is connected to the middle of the mixing channel to deliver gas to the mixing channel; the air ejector pipe is connected to the side of the mixing channel to deliver air to the mixing channel.

[0046] By placing the gas ejector tube 21 in the middle of the mixing channel and the air ejector tube in the side of the mixing channel, the gas enters from the middle of the mixing channel and the air enters from the side of the mixing channel. The two airflows cross and merge in the mixing channel, which is conducive to the full mixing of gas and air, while avoiding the gas directly impacting the ignition combustion mechanism 3 and causing local high temperature.

[0047] Furthermore, in this embodiment, the air ejector includes a blower ejector 22 and a natural ejector 23 respectively disposed on both sides of the gas ejector 21. The blower ejector 22 is connected to the blower 24 to guide the blower air to the mixing channel; the natural ejector 23 is connected to the atmosphere to guide the outside air to the mixing channel.

[0048] By installing a blower injector 22 and a natural gas injector 23 on both sides of the gas injector 21, the blower air and the natural gas supply air enter from different sides of the mixing channel. This not only provides sufficient primary air to improve combustion intensity when the blower 24 is working, but also automatically supplies gas through the natural gas injector 23 when the blower 24 stops working or its power is insufficient, maintaining a basic air-fuel ratio and avoiding problems such as unstable combustion, yellow flame, or flameout caused by abnormal blower operation. This improves the combustion stability and safety of the blower-boosted stove under different operating conditions.

[0049] Specifically, when the blower 24 is working normally, the blower ejector 22 forces a large amount of primary air into the mixing channel to meet the high-power cooking requirements; when the blower 24 stops working or its power is insufficient, a negative pressure is formed in the mixing channel, and the natural ejector 23 automatically draws in air from the atmosphere to supplement it, maintaining the basic air-fuel ratio and avoiding unstable combustion or flameout caused by abnormal blower operation.

[0050] Meanwhile, the two ejector tubes form a self-balancing adjustment under different blower power. That is, when the blower power is too high, the natural gas supply will automatically decrease, and when the blower power is insufficient, the natural gas supply will automatically increase. This keeps the air-fuel ratio in the mixing channel within a reasonable range, effectively preventing over-burning or under-burning, and improving the combustion stability, safety and user experience of the blower-boosted stove under different operating conditions.

[0051] Furthermore, in this embodiment, the mixing channel includes a mixing chamber 11 and a buffer chamber 12. Along the flow direction of the airflow, the buffer chamber 12 is located downstream of the mixing chamber 11. That is, the gas supply mechanism 2 supplies gas and air from the bottom of the mixing seat 1 respectively. During the process of the gas and air flowing from bottom to top, they first enter the mixing chamber 11 for premixing. The premixed gas flow then flows into the buffer chamber 12 and finally flows from the top of the mixing seat 1 to the ignition combustion mechanism 3 through the guide of the buffer chamber 12.

[0052] The cross-sectional area of ​​the buffer chamber 12 is larger than that of the mixing chamber 11. By increasing the cross-sectional area of ​​the buffer chamber 12, when the premixed airflow flows from the mixing chamber 11 with a smaller cross-sectional area to the buffer chamber 12 with a larger cross-sectional area, the airflow space suddenly expands and the flow velocity decreases accordingly, thereby playing a role in slowing down the flow and stabilizing the pressure.

[0053] By reducing the airflow velocity through the buffer chamber 12, it is possible to effectively prevent the premixed airflow from entering the flame transmission and combustion mechanism 3 at an excessively high velocity, which could lead to flame lift-off or flame detachment. At the same time, it allows the premixed airflow to be distributed more evenly within the buffer chamber 12, laying the foundation for subsequent entry into the flame transmission and combustion mechanism 3 and the formation of a stable combustion flame, thereby improving the combustion stability and safety of the blower-boosted stove.

[0054] Example 1:

[0055] Specifically, in this embodiment, a wave-shaped guide 111 is provided inside the mixing cavity 11. The wave-shaped guide 111 is a sheet-like structure that extends in a wave shape along the axial direction of the inner wall of the mixing cavity 11, that is, the wave-shaped guide 111 extends from the bottom to the top of the mixing cavity 11, consistent with the axial direction of the mixing cavity 11.

[0056] When the gas and air enter the mixing chamber 11 from the gas ejector pipe 21 and the air ejector pipe respectively, and flow through the corrugated guide pipe 111, the periodic undulating structure of the corrugated guide pipe 111 creates periodic disturbances to the gas and air mixed airflow, causing the airflow to generate repeated deflections and eddies in the mixing chamber 11, thereby increasing the contact area and collision probability between the gas and air, accelerating the premixing process of the gas and air, and making the mixing more thorough and uniform.

[0057] Example 2:

[0058] Specifically, in this embodiment, the mixing cavity 11 is provided with an array of protrusions 112. The array of protrusions 112 consists of multiple protrusions axially distributed along the inner wall of the mixing cavity 11, that is, multiple protrusions are arranged sequentially from bottom to top along the inner wall of the mixing cavity 11 to form a regular array structure.

[0059] When the gas and air enter the mixing chamber 11 from the gas ejector pipe 21 and the air ejector pipe respectively, and flow through the array protrusions 112, the array protrusions 112 form a shearing effect on the gas and air mixed airflow, causing the airflow to be divided, stretched and reorganized in the gaps between the protrusions, generating local turbulence and vortices, thereby promoting the uniform mixing of gas and air and improving the premixing quality.

[0060] Example 3:

[0061] Specifically, in this embodiment, the mixing cavity 11 is provided with both a wave-shaped guide 111 and an array of protrusions 112. That is, the wave-shaped guide 111 extends axially along the inner wall of the mixing cavity 11, and the array of protrusions 112 is distributed axially along the inner wall of the mixing cavity 11 and is located in the gap of the wave-shaped guide 111. The two coexist in the same mixing cavity 11.

[0062] By simultaneously setting the wave-shaped guide 111 and the array protrusions 112, the wave-shaped guide 111 provides periodic disturbance, and the array protrusions 112 provide local shear. The two work together to make the airflow undergo large-scale deflection and mixing, and the local shear makes the airflow finely divided and reorganized in a local area, thereby achieving a more complete and uniform premixing effect in a shorter mixing path, further improving the combustion efficiency and safety of the blower-boosted stove.

[0063] It should be noted that the above embodiments one and two can be used alone or in combination. Those skilled in the art can flexibly choose a single structure or a combination of structures according to actual needs and structural space, all of which fall within the protection scope of this invention.

[0064] Furthermore, in this embodiment, a rectifier plate 13 is provided at the outlet end of the buffer chamber 12. Specifically, the rectifier plate 13 is disposed between the buffer chamber 12 and the ignition combustion mechanism 3, and is used to rectify and split the premixed airflow flowing out of the buffer chamber 12.

[0065] The rectifier plate 13 is provided with a plurality of evenly distributed flow-diverting holes 131. When the premixed airflow flows from the buffer chamber 12 through the rectifier plate 13, the flow-diverting holes 131 divide the overall airflow into multiple low-speed small airflows, so that the originally concentrated large airflow is transformed into multiple dispersed small airflows evenly distributed.

[0066] By setting a rectifier plate 13 and multiple diversion holes 131 on the grid plate, multiple low-speed small airflows can further reduce the airflow velocity entering the flame transfer and combustion mechanism 3, effectively avoiding flame lift-off or flame detachment caused by excessive airflow velocity.

[0067] On the other hand, the overall airflow is divided into multiple smaller airflows and dispersed into the flame transmission and combustion mechanism 3, making the combustion flame distribution more uniform, improving the stability and thermal efficiency of combustion, and thus improving the overall combustion performance and safety of the blower-boosted stove.

[0068] Specifically, in this embodiment, the ignition combustion mechanism 3 includes a gas distribution base 31, an inner ring flame cover 32, and an outer ring flame cover 33. The gas distribution base 31 is disposed at the gas outlet end of the mixing seat 1, and the inner ring flame cover 32 is disposed at the gas outlet end of the mixing seat 1. That is, the gas distribution base 31 and the inner ring flame cover 32 are both disposed on the top of the mixing seat 1, and the outer ring flame cover 33 is disposed on the gas distribution base 31.

[0069] The inner ring burner cap 32 is located on the inner side of the top of the mixing seat 1, and has a flame outlet 321. The flame outlet 321 is used to output the mixed gas flow outward to form a central flame at the center of the stove's combustion area. The outer ring burner cap 33 is located on the outer side of the inner ring burner cap 32, and has a gas outlet 331. The gas outlet 331 is used to output the mixed gas flow outward to form an outer ring flame around the central flame.

[0070] The mixed airflow is output outward through the flame outlet 321 of the inner ring burner cap 32 and the air outlet 331 of the outer ring burner cap 33, forming an inner and outer double-ring flame structure. The central flame is concentrated in the center of the stove's combustion area, while the outer ring flame surrounds the central flame. The double-ring flames burn in synergy, resulting in a wider flame coverage and more uniform heat distribution, effectively improving the heating efficiency and combustion stability of the blower-boosted stove.

[0071] Specifically, in this embodiment, the air outlet end of the mixing seat 1 is provided with an inner ring air outlet 14 and an outer ring air outlet 15. The inner ring air outlet 14 is located in the inner region of the air outlet end of the mixing seat 1 and is connected to the inner ring flame cap 32. The outer ring air outlet 15 is located in the outer region of the air outlet end of the mixing seat 1, that is, the outer ring air outlet 15 is formed outside the inner ring air outlet 14 and is concentrically arranged with the inner ring air outlet 14.

[0072] After the premixed airflow, processed by the buffer chamber 12 and the rectifier plate 13, flows out from the top of the mixing seat 1, a portion of the airflow enters the inner ring burner cap 32 directly through the inner ring air outlet 14, and is then output outward through the flame outlet 321 on the inner ring burner cap 32, thereby forming a central flame at the center of the stove's combustion zone.

[0073] The gas distribution base 31 is provided with an air outlet channel 311. One end of the air outlet channel 311 is connected to the outer ring air outlet 15, and the other end is connected to the outer ring burner cap 33, forming a complete air path from the outer ring air outlet 15 of the mixing seat 1 through the interior of the gas distribution base 31 to the outer ring burner cap 33.

[0074] After the premixed airflow flows out from the top of the mixing seat 1, another part of the airflow enters the air outlet channel 311 in the gas distribution base 31 through the outer ring air outlet 15, and is then guided by the air outlet channel 311 to the outer ring flame cap 33. Finally, it is output outward through the air outlet 331 on the outer ring flame cap 33, thereby forming a ring-shaped outer ring flame around the central flame.

[0075] Through the ring arrangement of the inner ring air outlet 14 and the outer ring air outlet 15, and the guiding design of the air outlet channel 311 in the air distribution base 31, the premixed airflow output by the mixing seat 1 is orderly divided into inner and outer paths. The inner ring air outlet 14 is directly connected to the inner ring flame cap 32 to form the central flame, and the outer ring air outlet 15 is connected to the outer ring flame cap 33 through the air outlet channel 311 in the air distribution base 31 to form the outer ring flame.

[0076] The two airflows do not interfere with each other and supply gas independently, thereby achieving stable combustion of the inner and outer double-ring flames. This makes the flame coverage of the stove wider and the heat distribution more uniform, effectively improving the heating efficiency and combustion stability of the blower-boosted stove.

[0077] In this embodiment, the outer ring flame cap 33 is provided with multiple flame-transferring parts along the circumference, and the multiple flame-transferring parts are arranged at equal intervals on the top surface of the outer ring flame cap 33. Specifically, the flame-transferring parts protrude upward from the top surface of the outer ring flame cap 33 and are integrally formed to form a protruding structure that is evenly distributed along the circumference. This structure is used to guide the flame to spread along the circumference of the outer ring flame cap 33 after ignition, so as to avoid the flame burning only in a local area and causing discontinuous circumferential flame transmission.

[0078] Furthermore, in this embodiment, each flame transfer section is provided with an air outlet 331 on its side at different angles, so that the air outlet angles of the air outlets 331 on different sides of the flame transfer section are staggered, so as to make the outer ring flame evenly distributed circumferentially.

[0079] Specifically, each of the multiple ignition sections is a multi-faceted prism structure that protrudes upward from the top surface of the outer ring flame cap 33, and each ignition section has multiple sides with different angles. The air outlets 331 are distributed along the multiple sides of the ignition section at different angles, so that the air outlets 331 on different sides of the same ignition section have different air outlet angles, thereby causing the airflow directions ejected from each ignition section to be staggered.

[0080] The staggered distribution of the vent holes 331 structure enables the outer ring flame to form a multi-point staggered ignition effect in the circumferential direction, avoiding the phenomenon of uneven circumferential combustion caused by the flame being concentrated at a certain angle, thereby making the outer ring flame evenly distributed and burning stably throughout the entire circumferential direction.

[0081] The above-described contents can be implemented individually or in various combinations, and these variations are all within the protection scope of this invention.

[0082] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A premix combustion burner for a forced air induction range, characterized by: It includes a mixing seat (1), an air supply mechanism (2) located at the air inlet of the mixing seat (1), and a flame transfer and combustion mechanism (3) located at the air outlet of the mixing seat (1); the mixing seat (1) is provided with a mixing channel, and the gas and air supplied by the air supply mechanism (2) are pre-mixed in the mixing channel and then guided to the flame transfer and combustion mechanism (3), and the flame transfer and combustion mechanism (3) outputs the mixed gas flow to form a combustion flame.

2. A premix combustion burner for a forced air induction range as defined in claim 1, characterized in that: The gas delivery mechanism (2) includes a gas ejector pipe (21) and an air ejector pipe arranged radially side by side along the mixing seat (1). The gas ejector pipe (21) is connected to the middle of the mixing channel to deliver gas to the mixing channel, and the air ejector pipe is connected to the side of the mixing channel to deliver air to the mixing channel.

3. A premix combustion burner for a forced air induction range as defined in claim 2, characterized in that: The air ejector includes a blower ejector (22) and a natural ejector (23) respectively located on both sides of the gas ejector (21). The blower ejector (22) is connected to a blower (24) to guide blower air to the mixing channel. The natural ejector (23) is connected to the atmosphere to guide outside air to the mixing channel.

4. A premix combustion burner for a forced air induction range as defined in claim 1, wherein: The mixing seat (1) extends vertically, with the air inlet end of the mixing seat (1) located at the bottom and the air outlet end located at the top of the mixing seat (1). The mixing channel is located between the top and bottom of the mixing seat (1) so that the gas and air enter from the bottom of the mixing seat (1), flow from bottom to top through the mixing channel, and then flow out from the top of the mixing seat (1).

5. A premixed combustion and ignition distribution device for a blower-boosted stove as described in claim 4, characterized in that: The mixing channel includes a mixing chamber (11) and a buffer chamber (12). Along the direction of airflow, the buffer chamber (12) is located downstream of the mixing chamber (11). The cross-sectional area of ​​the buffer chamber (12) is larger than that of the mixing chamber (11) so that the flow rate of the premixed airflow decreases as it flows from the mixing chamber (11) to the buffer chamber (12).

6. A premixed combustion and ignition distribution device for a blower-boosted stove as described in claim 1, characterized in that: The mixing channel is provided with a wave-shaped guide (111), which extends axially along the inner wall of the mixing channel to create periodic disturbances to the gas and air mixed airflow, so as to accelerate the premixing of gas and air.

7. A premixed combustion and ignition distribution device for a blower-boosted stove as described in claim 1, characterized in that: The mixing channel is provided with an array of protrusions (112), which are multiple protrusions arranged axially along the inner wall of the mixing channel. They are used to shear the gas and air mixture flowing through the channel to promote uniform mixing of gas and air.

8. A premixed combustion and ignition distribution device for a blower-boosted stove as described in claim 5, characterized in that: The outlet end of the buffer cavity (12) is provided with a rectifier plate (13), and the rectifier plate (13) is provided with a plurality of evenly distributed diversion holes (131). The diversion holes (131) are used to divide the mixed airflow into multiple low-speed small airflows when the mixed airflow flows out of the buffer cavity (12).

9. A premixed combustion and ignition distribution device for a blower-boosted stove as described in claim 1, characterized in that: The ignition and combustion mechanism (3) includes a gas distribution base (31) located at the gas outlet of the mixing seat (1), an inner ring flame cap (32) located at the gas outlet of the mixing seat (1), and an outer ring flame cap (33) located on the gas distribution base (31). The inner ring flame cap (32) is provided with a flame outlet hole (321), which outputs the mixed gas flow to form a central flame. The outer ring flame cap (33) is provided with a gas outlet hole (331), which outputs the mixed gas flow to form an outer ring flame.

10. A premixed combustion and ignition distribution device for a blower-boosted stove as described in claim 9, characterized in that: The mixing seat (1) has an inner ring air outlet (14) at its outlet end, which is connected to the inner ring flame cap (32) to deliver the mixed airflow to the inner ring flame cap (32). The mixing seat (1) also has an outer ring air outlet (15) at its outlet end, which is formed outside the inner ring air outlet (14). The gas distribution base (31) has an air outlet channel (311) inside, which connects the outer ring air outlet (15) to the outer ring flame cap (33) to guide the mixed airflow to the outer ring flame cap (33).

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