Outer ring fire cover and combustor
Patent Information
- Application Number
- CN202522629243.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-11
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-12-11
AI Technical Summary
而且燃烧器性能越强，越容易产生啸叫
[0028]本实用新型的积极进步效果在于：由于消音片是沿火盖本体整圈布置，因此整个气体容纳腔内的气流均会沿着消音片倾斜的方向转动，当转动的气流冲向规律性涡流时，直接将涡流慢慢冲散，直至消失，进而啸叫消失，避免气流周期性冲击火盖本体壁面产生共振，从而从根源上消除或显著降低啸叫声。本实用新型无需调节风门大小，从而在不关小风门、不牺牲燃烧性能、不减少一次空气的前提下，从结构根源上抑制啸叫。
Smart Images
Figure CN224920410U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stoves, and in particular to an outer ring burner cap and burner. Background Technology
[0002] As cooktop thermal efficiency increases, burner performance also improves. In particular, the enhanced ejector performance of high-performance burners results in more thorough gas-air mixing and more intense combustion. Furthermore, in a cold state, the resistance to primary and secondary air supply is lower, allowing for more sufficient supply and further intensifying combustion. However, under these conditions, both the gas combustion rate and the gas exit velocity are very high. During the process from gas entering the burner orifice to combustion, gas vortices or resonance with parts of the burner structure can occur, leading to whistling. Moreover, the more powerful the burner, the more prone it is to whistling.
[0003] In existing technologies, whistling is usually reduced by decreasing the damper, but this cannot completely solve the burner whistling problem; it's only a temporary solution. Furthermore, this method indirectly reduces the adjustable range of the damper, weakening the stove's gas adaptability. In addition, reducing the damper also reduces the amount of primary air that can be introduced, increasing the risk of exceeding emission standards for carbon monoxide and other exhaust gases. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide an outer ring flame cap and burner.
[0005] The present invention solves the above-mentioned technical problems through the following technical solution:
[0006] An outer ring flame cap, the outer ring flame cap comprising a flame cap body and a plurality of sound-absorbing plates;
[0007] The flame cap body is provided with a flame hole, and a gas containing cavity is formed inside the flame cap body. The flame hole is connected to the gas containing cavity.
[0008] Multiple silencing plates are disposed within the gas containing cavity and connected to the flame cap body. The multiple silencing plates are spaced apart along the circumference of the outer ring flame cap. The thickness direction of the silencing plate corresponds to the circumference of the outer ring flame cap, and the central axis of the silencing plate on the horizontal plane does not pass through the radial center of the outer ring flame cap.
[0009] In this design, because the silencer is arranged around the entire burner body, the airflow within the entire gas chamber rotates along the direction of the silencer's inclination. When the rotating airflow encounters the regular vortex, it directly and gradually disperses the vortex until it disappears, thus eliminating the whistling sound. This avoids resonance caused by the periodic impact of airflow on the burner body wall, thereby eliminating or significantly reducing the whistling sound at its source. This design eliminates the need to adjust the damper size, thus suppressing the whistling sound from its structural root without closing the damper, sacrificing combustion performance, or reducing primary air.
[0010] Preferably, the silencing plate has a first guide section, a second guide section, and a third guide section on the axial end face of the outer ring flame cap facing the inlet of the gas receiving cavity. The first guide section, the second guide section, and the third guide section are arranged sequentially in the radial direction of the outer ring flame cap. The first guide section is located at the end of the second guide section facing the radial inner side of the outer ring flame cap, and the third guide section is located at the end of the second guide section facing the radial outer side of the outer ring flame cap. The end of the first guide section near the second guide section is inclined in the axial direction of the outer ring flame cap towards the inlet of the gas receiving cavity, and the end of the third guide section near the second guide section is inclined in the axial direction of the outer ring flame cap towards the inlet of the gas receiving cavity.
[0011] In this scheme, the above settings can better guide the gas flow, make the gas flow more stable, and reduce the generation of eddies.
[0012] Preferably, the length of the first guide segment in the radial direction of the outer ring flame cap is greater than the length of the third guide segment in the radial direction of the outer ring flame cap.
[0013] Preferably, the two end faces of the sound-absorbing sheet in its thickness direction are inclined surfaces that are oriented in the same direction as the horizontal plane.
[0014] In this design, the aforementioned configuration more effectively guides the airflow to rotate or change direction in the circumferential direction, greatly enhancing its ability to disrupt regular vortices and resulting in superior noise reduction. Furthermore, the inclined slope structure is less prone to impurity deposition and possesses a self-cleaning effect under airflow scouring, which helps maintain stable noise reduction performance over the long term.
[0015] Preferably, the corner edges of the silencing plate and the connecting edge between the silencing plate and the flame cap body are rounded.
[0016] In this design, all corner edges and connections are rounded to avoid the generation of new, small-scale turbulence and eddies from sharp or right angles, further reducing airflow resistance and making the airflow smoother, which helps to reduce noise and energy loss. Moreover, the rounded transitions facilitate mold demolding and product casting, improving production yield and efficiency.
[0017] Preferably, the silencing plate and the flame hole have a gap in the radial direction of the outer ring flame cap, and the distance between the silencing plate and the flame hole in the radial direction of the outer ring flame cap is defined as L, and the diameter of the flame hole is d;
[0018] Where L > 0.5*d.
[0019] In this solution, the above-mentioned settings ensure that while the silencer plate plays a role in turbulence and noise reduction, it will not excessively obstruct the smooth flow of gas to the burner hole, thus avoiding problems such as flame detachment, backfire, or incomplete combustion caused by poor gas flow. This fundamentally ensures that the silencer structure does not affect the core combustion function.
[0020] Preferably, the plurality of the sound-absorbing plates are evenly spaced along the circumference of the outer ring fire cover.
[0021] In this scheme, the above-mentioned setup can create a uniform and symmetrical turbulence field within the gas containment cavity, ensuring that the gas flow characteristics remain consistent in all directions, thereby providing a stable and consistent silencing effect and contributing to the formation of a uniform flame.
[0022] Preferably, the distance between two adjacent silencing plates in the circumferential direction of the outer ring fire cap is defined as S;
[0023] Where 2*L < S < 5*L.
[0024] In this design, if the distance between the two silencers is too small, the gas flowing along the silencers may leap over part of them, creating a silencing blind zone. The vortices within this blind zone cannot be eliminated, meaning the whistling sound within it cannot be eliminated. If the distance between the two silencers is too large, the guiding effect of the rotating silencers is insufficient, preventing the airflow from flowing stably along the direction of the silencers and failing to disperse any potential vortices, thus failing to silence the gas. The above arrangement ensures stable airflow along the direction of the silencers without creating a silencing blind zone, thereby eliminating vortices and whistling sound within the entire gas chamber.
[0025] Preferably, the silencing plate is integrally formed with the flame cap body.
[0026] In this design, the one-piece molding process is simple and can increase the overall strength of the outer ring flame cap, making it less likely to resonate with the airflow, thus making it less likely to produce a whistling sound due to resonance.
[0027] A burner comprising an outer ring flame cap as described above.
[0028] The significant advantages of this invention are as follows: Because the silencing plate is arranged around the entire burner cap body, the airflow within the entire gas chamber rotates along the inclined direction of the silencing plate. When the rotating airflow encounters the regular vortex, it directly and gradually disperses the vortex until it disappears, thus eliminating the whistling sound. This avoids resonance caused by the periodic impact of the airflow on the burner cap body wall, thereby eliminating or significantly reducing the whistling sound at its source. This invention eliminates the need to adjust the damper size, thus suppressing the whistling sound from its structural origin without closing the damper, sacrificing combustion performance, or reducing primary air. Attached Figure Description
[0029] Figure 1 This is a three-dimensional structural diagram of the outer ring flame cap according to an embodiment of the present invention.
[0030] Figure 2 This is a three-dimensional structural diagram of the outer ring flame cap according to an embodiment of the present invention.
[0031] Figure 3 This is a bottom view of the outer ring flame cap of an embodiment of the present invention.
[0032] Explanation of reference numerals in the attached figures:
[0033] Fire cover body 1
[0034] Gas containment chamber 11
[0035] Fire Hole 12
[0036] Silencer 2
[0037] First guiding section 21
[0038] Second guiding section 22
[0039] Third guiding section 23
[0040] First side view 24
[0041] Second side 25 Detailed Implementation
[0042] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.
[0043] like Figure 1 and Figure 2 As shown, this embodiment discloses a burner including an outer annular mixing chamber and an outer annular flame cap, with the outer annular flame cap fixed to the upper end of the outer annular mixing chamber. A mixing cavity is formed inside the outer annular mixing chamber, and a gas receiving cavity 11 is formed inside the outer annular flame cap. The mixing cavity and the gas receiving cavity 11 are connected to each other to accommodate a mixture of combustion gas and primary air.
[0044] The lower end of the gas-containing cavity 11 is open, and the lower opening of the gas-containing cavity 11 is the inlet of the gas-containing cavity 11.
[0045] like Figure 1 and Figure 2 As shown, the outer ring flame cap includes a flame cap body 1 and multiple sound-absorbing plates 2.
[0046] like Figure 1 and Figure 2 As shown, a gas containing cavity 11 is formed inside the flame cap body 1. A flame hole 12 is provided on the side wall of the flame cap body 1. Both ends of the flame hole 12 are connected. One end of the flame hole 12 is connected to the gas containing cavity 11, and the other end of the flame hole 12 is connected to the external space.
[0047] like Figure 2 and Figure 3 As shown, multiple silencing plates 2 are located on the radially inner side of the flame hole 12 facing the outer ring flame cap. Multiple silencing plates 2 are disposed in the gas containing cavity 11 and connected to the flame cap body 1. Multiple silencing plates 2 are arranged at intervals along the circumference of the outer ring flame cap.
[0048] Specifically, in this embodiment, the multiple silencing plates 2 are integrally formed with the flame cap body 1. The integral forming process is simple and can increase the overall strength of the outer ring flame cap, making it less likely to resonate with the airflow in the gas containing cavity 11, thus making it more difficult to produce a whistling sound due to resonance. In other alternative embodiments, the silencing plates 2 and the flame cap body 1 can also be formed separately and then assembled.
[0049] Furthermore, multiple silencers 2 are evenly spaced along the circumference of the outer ring flame cap, thereby forming a uniform and symmetrical turbulence field within the gas receiving cavity 11. This ensures that the gas flow characteristics remain consistent in all directions, providing a stable and consistent silencing effect and contributing to the formation of a uniform flame. In other alternative embodiments, the spacing between the multiple silencers 2 along the circumference of the outer ring flame cap may not be exactly the same.
[0050] like Figure 2 and Figure 3 As shown, the silencing plate 2 extends approximately radially along the outer ring flame cap. The thickness direction of the silencing plate 2 corresponds to the circumferential direction of the outer ring flame cap, and the central axis a of the silencing plate 2 on the horizontal plane does not pass through the radial center P of the outer ring flame cap. In this embodiment, the phrase "the thickness direction of the silencing plate 2 corresponds to the circumferential direction of the outer ring flame cap" can mean that the thickness direction of the silencing plate 2 is parallel to the circumferential direction of the outer ring flame cap, or it can mean that the thickness direction of the silencing plate 2 has a small angle with the circumferential direction of the outer ring flame cap, with the angle not exceeding 45°.
[0051] When vortices appear in a portion of the gas containment cavity 11, causing a whistling sound, these vortices inevitably cause some of the airflow to begin rotating. Maintaining this rotating flow, i.e., keeping the vortex stable, is necessary to continuously produce the whistling sound. However, when the airflow encounters the rotating silencer 2, it flows along the silencer 2. Since the silencer 2 is arranged around the entire circumference of the burner body 1, the airflow throughout the gas containment cavity 11 rotates along the inclined direction of the silencer 2. When the rotating airflow encounters the regular vortices, it directly and slowly disperses the vortices until they disappear, thus eliminating the whistling sound. This avoids the periodic impact of the airflow on the burner body 1 wall, preventing resonance and eliminating or significantly reducing the whistling sound at its source. This solution eliminates the need to adjust the damper size, thus suppressing the whistling sound from its structural root without closing the damper, sacrificing combustion performance, or reducing primary air.
[0052] like Figure 2 and Figure 3 As shown, the silencer 2 has a first guide section 21, a second guide section 22, and a third guide section 23 on the end face of the outer ring burner facing the inlet of the gas receiving cavity 11 in the axial direction. The first guide section 21, the second guide section 22, and the third guide section 23 are arranged sequentially in the radial direction of the outer ring burner. The first guide section 21 is located at the end of the second guide section 22 facing the radial inner side of the outer ring burner, and the third guide section 23 is located at the end of the second guide section 22 facing the radial outer side of the outer ring burner. The end of the first guide section 21 near the second guide section 22 is inclined in the axial direction of the outer ring burner towards the inlet of the gas receiving cavity 11, and the end of the third guide section 23 near the second guide section 22 is also inclined in the axial direction of the outer ring burner towards the inlet of the gas receiving cavity 11. The length of the first guide section 21 in the radial direction of the outer ring burner is greater than the length of the third guide section 23 in the radial direction of the outer ring burner, so as to better guide the gas flow, make the gas flow more stable, and reduce the generation of eddies.
[0053] Preferably, the first guide segment 21, the second guide segment 22, and the third guide segment 23 are all curved surfaces. In other alternative embodiments, the first guide segment 21, the second guide segment 22, and the third guide segment 23 may also be planar.
[0054] Furthermore, the sound-absorbing plate 2 has a first side surface 24 and a second side surface 25 on its two ends in the thickness direction. The first side surface 24 and the second side surface 25 are inclined surfaces that face the same direction as the horizontal plane, thereby more effectively guiding the airflow to rotate or change direction in the circumferential direction, greatly enhancing the ability to disrupt regular vortices and resulting in better sound absorption. Moreover, the inclined surface structure is not prone to the deposition of impurities and has a self-cleaning effect under the scouring of airflow, which is conducive to maintaining stable sound absorption performance over a long period of time.
[0055] Preferably, both the first side surface 24 and the second side surface 25 are curved surfaces. In other alternative embodiments, the first side surface 24 and the second side surface 25 may also be planar.
[0056] Furthermore, the corner edges of the silencing plate 2, as well as the connecting edge between the silencing plate 2 and the flame cap body 1, are all rounded. Rounding all corner edges and connections avoids the generation of new, small-scale turbulence and eddies from sharp or right angles, further reducing airflow resistance and making the airflow smoother, which helps reduce noise and energy loss. Moreover, the rounded transitions facilitate mold demolding and product casting, improving production yield and efficiency.
[0057] Furthermore, the radius of the transition arc at the connection edge between the silencing plate 2 and the flame cap body 1 can be designed to be relatively large.
[0058] like Figure 3 As shown, the silencer 2 and the flame hole 12 have a gap in the radial direction of the outer ring flame cap. The distance between the silencer 2 and the flame hole 12 in the radial direction of the outer ring flame cap is defined as L, and the diameter of the flame hole 12 is defined as d; where L > 0.5 * d.
[0059] This embodiment ensures that while the muffler 2 plays a role in turbulence and noise reduction, it does not excessively obstruct the smooth flow of gas to the flame hole 12, thus avoiding problems such as flame detachment, backfire, or incomplete combustion caused by poor gas flow. This fundamentally ensures that the muffler structure does not affect the core combustion function.
[0060] Furthermore, the distance between two adjacent mufflers 2 in the circumferential direction of the outer ring fire cover is defined as S; where 2*L < S < 5*L.
[0061] If the distance between the two mufflers 2 is too small, the gas flowing along the mufflers 2 may leap over part of the mufflers 2, forming a silencing blind zone. The vortices in the silencing blind zone cannot be eliminated, meaning the whistling within the silencing blind zone cannot be eliminated. If the distance between the two mufflers 2 is too large, the guiding effect of the rotating mufflers 2 is insufficient, making it impossible for the airflow to flow stably along the direction of the mufflers 2, and unable to disperse any possible vortices, thus failing to silence the gas. The above arrangement allows the airflow to flow stably along the direction of the mufflers 2 without creating a silencing blind zone, thereby ensuring that there are no vortices or whistling within the entire gas receiving cavity 11.
[0062] The burner can be controlled by a voice module. The burner is equipped with a controller, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the corresponding structures in the burner (such as ignition needles, solenoid valves, etc.) to perform corresponding operations, thereby realizing intelligent control of the burner and improving the user experience.
[0063] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown by the device or component during normal use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0064] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.
Claims
1. An outer ring flame cap, characterized in that, The outer ring flame cap includes a flame cap body and multiple sound-absorbing plates; The flame cap body is provided with a flame hole, and a gas containing cavity is formed inside the flame cap body. The flame hole is connected to the gas containing cavity. Multiple silencing plates are disposed within the gas containing cavity and connected to the flame cap body. The multiple silencing plates are spaced apart along the circumference of the outer ring flame cap. The thickness direction of the silencing plate corresponds to the circumference of the outer ring flame cap, and the central axis of the silencing plate on the horizontal plane does not pass through the radial center of the outer ring flame cap.
2. The outer ring flame cap as described in claim 1, characterized in that, The silencing plate has a first guide section, a second guide section, and a third guide section on the axial end face of the outer ring flame cap facing the inlet of the gas receiving cavity. The first guide section, the second guide section, and the third guide section are arranged sequentially in the radial direction of the outer ring flame cap. The first guide section is located at the end of the second guide section facing the radial inner side of the outer ring flame cap, and the third guide section is located at the end of the second guide section facing the radial outer side of the outer ring flame cap. The end of the first guide section near the second guide section is inclined in the axial direction of the outer ring flame cap towards the inlet of the gas receiving cavity, and the end of the third guide section near the second guide section is inclined in the axial direction of the outer ring flame cap towards the inlet of the gas receiving cavity.
3. The outer ring flame cap as described in claim 2, characterized in that, The length of the first guide segment in the radial direction of the outer ring flame cap is greater than the length of the third guide segment in the radial direction of the outer ring flame cap.
4. The outer ring flame cap as described in claim 2, characterized in that, The sound-absorbing sheet has two inclined surfaces on both ends in the thickness direction that are inclined in the same direction as the horizontal plane.
5. The outer ring flame cap as described in claim 1, characterized in that, The corner edges of the silencing plate and the connecting edge between the silencing plate and the flame cap body are all rounded.
6. The outer ring flame cap as described in any one of claims 1-5, characterized in that, The silencing plate and the flame hole have a gap in the radial direction of the outer ring flame cap. The distance between the silencing plate and the flame hole in the radial direction of the outer ring flame cap is defined as L, and the diameter of the flame hole is defined as d. Where L > 0.5*d.
7. The outer ring flame cap as described in claim 6, characterized in that, The plurality of the sound-absorbing plates are evenly spaced along the circumference of the outer ring fire cover.
8. The outer ring flame cap as described in claim 7, characterized in that, The distance between two adjacent silencers in the circumferential direction of the outer ring fire cap is defined as S; Where 2*L < S < 5*L.
9. The outer ring flame cap as described in claim 1, characterized in that, The sound-absorbing plate is integrally formed with the flame cap body.
10. A burner, characterized in that, The burner includes an outer ring flame cap as described in any one of claims 1-9.