Premixing burner and gas stove
By setting up premixing chambers and circumferential air guide channels in the premixed burner head, the mixed gas rotates counterclockwise, solving the problem of uneven mixing of gas and air, and achieving improved combustion efficiency and fuel combustion efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG BOLI COOKER TECH CO LTD
- Filing Date
- 2025-05-12
- Publication Date
- 2026-05-12
AI Technical Summary
The premixing of gas and air in existing premixed burners is not uniform enough, resulting in a large gap between the combustion efficiency and the theoretical value. The mixing path is simple and the mixing time is short, making it difficult to meet the requirement of complete mixing.
The premixing chamber is divided into upper and lower sections, and circumferentially spaced air guide channels are set in the premixing chamber. The mixed gas rotates counterclockwise in the premixing chamber. The deflection setting of the air guide channels increases the mixing path and time, promoting the mixing of gas and air.
It improves the uniformity and completeness of the mixing of gas and air, enhances combustion efficiency, reduces the emission of unburned gas, reduces environmental pollution, and has a simple structure and low cost.
Smart Images
Figure CN224229996U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas stove technology, and in particular to a premixed burner head. Background Technology
[0002] A premixed burner head is a stove component designed for high-efficiency combustion. Its working principle involves pre-mixing fuel gas and air in a specific ratio before injecting the mixture for combustion. The core structure of this burner head includes key components such as the main furnace shell, the furnace shell core seat, and the furnace core. During operation, fuel gas and air first enter the premixing chamber through the gas inlet, where they are mixed either through simple diffusion or a preliminary guiding mechanism. Subsequently, the mixed gas is injected through the gas outlet of the furnace core for combustion.
[0003] The core advantage of premixed technology lies in its ability to significantly improve combustion efficiency and effectively reduce pollutant emissions by pre-mixing fuel gas and air. However, most widely used premixed burners employ a single-stage premixing chamber design, where fuel gas and air are mixed within a relatively single chamber. This design limits the diversity of mixing paths, and the residence time of the mixed gas within the chamber is relatively short, making it difficult to meet the requirement of complete mixing. Therefore, despite the use of premixed technology, the actual combustion efficiency of fuel gas still falls significantly short of the theoretical maximum during actual combustion. Utility Model Content
[0004] The purpose of this invention is to provide a premixed burner head that solves the problem of insufficient and uneven premixing of gas and air in the premixed burner head, and has the advantages of enhanced mixing effect, simple structure, and low cost.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a premixed burner head, comprising a furnace shell body, a furnace shell core seat, and a furnace core. The furnace shell core seat is located inside the furnace shell body, and the furnace core is installed above the furnace shell core seat. The furnace shell body, the furnace shell core seat, and the furnace core form a premixing cavity. A premixing component is installed inside the premixing cavity, dividing the premixing cavity into an upper premixing cavity and a lower premixing cavity. The furnace core has an outlet communicating with the upper premixing cavity, and the furnace shell body has a gas inlet communicating with the lower premixing cavity. A ventilation space is formed at the bottom of the upper premixing cavity. The premixing component has several air guide channels circumferentially spaced around the axis of the premixing component. The air inlet of the air guide channel is located at the bottom of the air guide channel and communicates with the lower premixing cavity. The ventilation space is located radially outside the air guide channel, and the air outlet of the air guide channel faces the ventilation space and communicates with the ventilation space.
[0006] After adopting the above technical solution, the present invention has the following advantages: the premixed burner head forms a premixed cavity for premixing gas and air by means of the furnace shell body, the furnace shell core seat and the furnace core. By installing a premixing element within the premixing chamber, the premixing chamber is divided into an upper premixing chamber and a lower premixing chamber, which are distributed vertically. The furnace shell body has a gas inlet connected to the lower premixing chamber. The premixing element has several circumferentially spaced air guide channels around its axis. The air inlets of the air guide channels are connected to the lower premixing chamber, and the air outlets are connected to the ventilation space of the upper premixing chamber. The ventilation space is located radially outside the air guide channels. In this way, the blown mixed gas will impact the inner wall of the furnace shell body and then be blown out from the air outlet along the axial direction of the premixing element. Compared with the prior art where the mixed gas is directly blown out from the air outlet, this method allows the mixed gas to flow directly along the axial direction of the premixing element to the air outlet. This air outlet method not only increases the mixing path of the gas and air in the premixing chamber but also extends the mixing time, thereby improving the mixing efficiency and making the gas and air mix more evenly and fully. This also improves the combustion efficiency of the gas in the subsequent combustion process. This not only improves the thermal efficiency of the premixed burner, but also reduces the emission of incompletely burned gas, thus reducing environmental pollution. Furthermore, the ventilation space provides more room for the gas mixture to move, further promoting the mixing of gas and air.
[0007] Furthermore, at least one air guide channel is radially deflected relative to the premixing chamber, so that the mixed gas entering the upper premixing chamber through the air guide channel outlet rotates counterclockwise around the axis of the premixing chamber.
[0008] By adopting the aforementioned technical solution, the deflection setting of the air outlet of the air guide channel causes the mixed gas entering the premixing chamber to have a counterclockwise tangential velocity, causing the mixed gas to rotate counterclockwise in the premixing chamber. Since the rotation can generate turbulence, it increases the chance of collision between gas molecules, which is more conducive to the mixing of gas and air.
[0009] Furthermore, all air guide channels have the same radial deflection direction relative to the premixing chamber.
[0010] Using the aforementioned technical solution, when gas enters the premixing chamber through the outlet of the air guide channel, the deflection of the outlet causes the mixed gas to acquire a tangential velocity, resulting in rotation within the premixing chamber in a specific direction. Since the outlets of all air guide channels deflect in the same direction, the gas exiting from all channels acquires the same tangential velocity, thus creating a uniform rotation direction within the premixing chamber. This uniform rotation direction enhances turbulence within the premixing chamber. Turbulence increases collisions between gas molecules, promoting better mixing of fuel gas and air, allowing for more complete combustion and improving combustion efficiency.
[0011] Furthermore, the premixed component includes an upper sealing plate and several air guide vanes connected below the upper sealing plate. The air guide vanes are circumferentially spaced around the axis of the premixed component, and an air guide channel is formed between two adjacent air guide vanes.
[0012] Using the aforementioned technical solution, although the mixed gas has already been mixed before entering the premixing unit, there may be uneven mixing. Therefore, when the mixed gas enters the premixing unit and passes through the air guide vane, the air guide vane will change the flow direction of the gas, causing it to flow along the air guide channel, promoting the mixing of gas and air. In the air guide channel, the mixed gas passes through the air guide channel and collides with the side wall of the air guide channel during this process, further making the mixed gas more uniform, thereby achieving more thorough mixing.
[0013] Furthermore, the premixed component also includes a lower sealing plate, which has a ring structure and is located outside the air guide vanes and the air inlet of the air guide channel. Several air guide vanes are connected to the lower sealing plate, and the air outlet of the air guide channel is located between the upper sealing plate and the lower sealing plate. The lower sealing plate is connected to the furnace shell body.
[0014] By adopting the aforementioned technical solution, the lower sealing plate provides an additional support structure for the premix, which increases the stability of the entire premix and prevents the premix from deforming. Furthermore, the air guide channel is located between the upper and lower sealing plates, which allows the mixed gas to be mixed through the air guide channel, thereby improving the mixing efficiency.
[0015] Furthermore, the lower part of the premixing chamber is provided with an inwardly protruding support step, which supports the lower sealing plate.
[0016] Using the aforementioned technical solution, the supporting step provides a support point for the lower sealing plate, enhancing its stability and thus the overall structural stability of the premixing component. The lower sealing plate rests on the supporting step, creating a sealed area between them, preventing the mixed gas from leaking out from the gap between the premixing chamber and the lower sealing plate. This ensures the mixing effect of the gas within the premixing chamber and avoids gas leakage.
[0017] Furthermore, the upper sealing plate includes an upper sealing plate body located above the sealed air guide channel and an inner sealing plate located inside the air guide channel. The inner sealing plate is located inside several air guide plates and connected to the air guide plates. The upper end of the inner sealing plate is connected to the upper sealing plate body.
[0018] Using the aforementioned technical solution, the inner sealing plate provides a seal for the air guide channel. Since the inner sealing plate is connected to the inner side of the air guide vane and forms a single unit with the upper sealing plate, it effectively prevents gas leakage from the gap between the air guide channel and the upper sealing plate. This ensures the mixing effect of the gas in the premixing chamber and prevents gas leakage.
[0019] Furthermore, the premixed component is a one-piece cast structure.
[0020] Furthermore, the premixed burner head also includes an ignition sensing needle assembly and a flame suppressor. The flame suppressor is installed above the furnace core and has several flame outlet holes. The furnace core seat extends upward from the bottom of the furnace shell body. The center of the furnace core seat has a first through hole extending vertically, and the furnace core has a second through hole extending vertically. The ignition sensing needle assembly passes through the first and second through holes and is exposed at the top of the second through hole. The flame suppressor has an annular flared structure that is larger at the top and smaller at the bottom. The outer wall of the flame suppressor and the inner wall of the furnace shell body form an annular flame outlet cavity that is smaller at the top and larger at the bottom. The flame outlet holes are located on the side wall of the flame suppressor, and the diameter of the flame outlet holes decreases from bottom to top. The gas outlet is located at the top of the furnace core and communicates with the annular flame outlet cavity.
[0021] Furthermore, a gas stove includes the aforementioned premixed burner. Attached Figure Description
[0022] The present invention will be further described below with reference to the accompanying drawings:
[0023] Figure 1 This is a schematic diagram of the structure of a premixed burner head according to the present invention;
[0024] Figure 2 This is a cross-sectional schematic diagram of a premixed burner head according to the present invention;
[0025] Figure 3 This is the front view of the utility model;
[0026] Figure 4 The structure of the premixed component in this utility model Figure 1 ;
[0027] Figure 5 The structure of the premixed component in this utility model Figure 2 . Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.
[0029] The terms "first," "second," etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects, not to describe a specific order or sequence. Even if "second" is used before a technical feature for distinction, it does not necessarily imply the presence of "first." It should be understood that in this utility model, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, and Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Containing X, Y, and Z," "Containing X, Y, and Z" means that all three X, Y, and Z are included; "Containing X, Y, or Z" means that one of X, Y, and Z is included; "Containing X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are included.
[0030] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.
[0031] like Figures 1 to 5 As shown, this utility model provides a premixed burner head, including a furnace shell body 1, a furnace shell core seat 2, and a furnace core 3. The furnace shell core seat 2 is disposed inside the furnace shell body 1, and the furnace core 3 is installed above the furnace shell core seat 2. The furnace shell body 1, the furnace shell core seat 2, and the furnace core 3 form a premixing cavity 11. A premixing component 12 is installed in the premixing cavity 11, and the premixing component 12 divides the premixing cavity 11 into an upper premixing cavity 111 and a lower premixing cavity 112 distributed vertically. The furnace core 3 is provided with an air outlet 31 communicating with the upper premixing cavity 111, and the furnace shell body 1 is provided with an outlet 31 communicating with the bottom of the lower premixing cavity 112. A gas inlet 13 is provided. A ventilation space 100 is formed at the bottom of the upper premixing chamber. The premixing component 12 is provided with a plurality of air guide channels 121 arranged circumferentially around the axis of the premixing component 12. The air inlet of the air guide channel 121 is located at the bottom of the air guide channel 121 and communicates with the lower premixing chamber 112. The ventilation space 100 is located on the radial outer side of the air guide channel 121. The air outlet of the air guide channel 121 faces the ventilation space 100 and communicates with the ventilation space 100.
[0032] It is understandable that the premixed burner head, together with the furnace shell body 1, the furnace shell core seat 2 and the furnace core 3, forms a premixed chamber 11 for premixing the gas and air. By setting a premixing element 12 inside the premixing chamber 11, the premixing chamber 11 is divided into an upper premixing chamber 111 and a lower premixing chamber 112 distributed vertically. The furnace shell body 1 is provided with a gas inlet 13 communicating with the lower premixing chamber 112. The premixing element 12 is provided with several air guide channels 121 spaced circumferentially along its axis. The air inlet of the air guide channel 121 is connected to the lower premixing chamber 112, and the air outlet 122 is connected to the ventilation space 100 of the upper premixing chamber 111. The ventilation space 100 is located on the radial outer side of the air guide channel 121. In this way, the blown mixed gas will collide with the inner wall of the furnace shell body 1 and then be blown out from the air outlet along the axial direction of the premixing element 12. Compared with the prior art where the mixed gas is directly blown out from the air outlet, the mixed gas flows directly along the axial direction of the premixing element 12 to the air outlet. This air outlet method not only makes the gas and air mix more evenly and fully, but also improves the combustion efficiency of the gas in the subsequent combustion process. This not only improves the thermal efficiency of the premixed burner, but also reduces the emission of incompletely burned gas, thus reducing environmental pollution. Furthermore, the ventilation space 100 provides more room for the gas mixture formed by the gas and air to move, further promoting the mixing of gas and air.
[0033] The space enclosed by the premixed component 12 and the side wall of the furnace shell 1 is the ventilation space 100.
[0034] Furthermore, theoretically, as long as the outlet 122 of at least one air guide channel 121 is deflected counterclockwise relative to the premixing chamber 11, the mixed gas entering the upper premixing chamber 111 through the outlet 122 of the air guide channel 121 can rotate counterclockwise around the axis of the premixing chamber 11.
[0035] This is due to the deflection setting of the air outlet 122 of the air guide channel 121, which gives the mixed gas entering the premixing chamber 11 a counterclockwise tangential velocity, causing the mixed gas to rotate counterclockwise in the premixing chamber 11. Since the rotation can generate turbulence, it increases the chance of collision between gas molecules, which is more conducive to the mixing of gas and air.
[0036] To achieve better results, the air outlets 122 of all air guide channels 121 are deflected in the same radial direction relative to the premixing chamber 11.
[0037] When gas enters the premixing chamber 11 through the outlet 122 of the air guide channel 121, the deflection of the outlet 122 causes the mixed gas to acquire a tangential velocity, resulting in rotation within the premixing chamber 11 in a specific direction. Since the outlets 122 of all air guide channels 121 are deflected in the same direction, the gas exiting all air guide channels 121 acquires the same tangential velocity, thus creating a uniform rotation direction within the premixing chamber 11. This uniform rotation direction enhances turbulence within the premixing chamber 11. Turbulence increases collisions between gas molecules, promoting better mixing of fuel gas and air, allowing for more complete combustion and improving combustion efficiency.
[0038] Although the air outlet 122 of the air guide channel 121 is deflected in a counterclockwise direction relative to the premixing chamber 11 in this embodiment, the deflection of the air outlet 122 of the air guide channel 121 in a clockwise direction relative to the premixing chamber 11 can achieve the purpose of promoting better mixing of gas and air.
[0039] The gas inlet 13 is located on the side wall of the furnace shell body 1. Within the radial section of the premixing chamber 11, the gas inlet 13 is eccentrically positioned in a clockwise direction relative to the radial direction of the premixing chamber 11.
[0040] Specifically, the gas inlet 13 is located on the side wall of the furnace shell body 1, within the radial section of the premixing chamber 11 (the radial section refers to a surface parallel to the diameter direction). The gas inlet 13 is eccentrically positioned clockwise relative to the radial direction of the premixing chamber 11, causing the gas entering the outer mixing chamber 112b through the gas inlet 13 to rotate clockwise around the axis of the premixing chamber 11. Due to centrifugal force, the gas is fully mixed in the outer mixing chamber 112b and then enters the inner mixing chamber 112a, subsequently entering the air guide channel 121 above the inner mixing chamber 112a. In particular, the air outlet 122 of the air guide channel 121 is deflected counterclockwise relative to the radial direction of the premixing chamber 11, causing the mixed gas entering the upper premixing chamber 111 to undergo counterclockwise centrifugal rotation, opposite to the rotation direction of the lower premixing chamber 112. Through the counter-current swirling action of the upper premixing chamber 111 and the lower premixing chamber 112, the fuel gas and air achieve three-stage enhanced mixing within the premixing chamber 11 (clockwise swirling mixing in the outer mixing chamber 112b → laminar mixing in the inner mixing chamber 112a → counter-clockwise swirling mixing in the upper premixing chamber 111), significantly improving premixing uniformity. This solution, through a simple eccentric swirling structure design, achieves and enhances multi-stage mixing without requiring additional premixing components, offering significant advantages such as compact structure, low cost, and high premixing efficiency.
[0041] The inner mixing cavity 421 and the outer mixing cavity 422 are directly connected and do not require an actual dividing structure; the division is only a virtual conceptual division, so there may be no obvious dividing line between them. Of course, to enhance the dividing effect, a dividing structure can be set on the furnace shell body 1 or the premixing cavity 4 to physically divide the inner mixing cavity 421 and the outer mixing cavity 422. However, the divided inner mixing cavity 421 and the outer mixing cavity 422 must have at least one connection point.
[0042] Specifically, the gas inlet 13 includes an air inlet 131 and a gas inlet 132, both of which are connected to the external mixing chamber 112b.
[0043] It should be noted that the premix 12 includes an upper sealing plate 123 and a plurality of air guides 124 connected below the upper sealing plate 123. The plurality of air guides 124 are circumferentially spaced around the axis of the premix 12, and an air guide channel 121 is formed between two adjacent air guides 124.
[0044] Before the mixed gas enters the premixing unit 12, although it has already been mixed, there may be uneven mixing. Therefore, when the mixed gas enters the premixing unit 12 and passes through the guide vane 124, the guide vane 124 will change the flow direction of the gas, causing it to flow along the guide channel 121, promoting the mixing of gas and air. In the guide channel 121, the mixed gas passes through the guide channel 121 and collides with the side wall of the guide channel 121 during this process, further making the mixed gas more uniform, thereby achieving more thorough mixing.
[0045] To provide additional support for the premix 12, the premix 12 also includes a lower sealing plate 125. The lower sealing plate 125 has an annular structure and is located radially outside the air inlet of the air guide vanes 124 and the air inlet of the air guide channel 121 (radial outside refers to the relative outside in the diameter direction). Several air guide vanes 124 are connected to the lower sealing plate 125. The air outlet 122 of the air guide channel 121 is located between the upper sealing plate 123 and the lower sealing plate 125. The lower sealing plate 125 is sealed to the furnace shell body 1. This increases the stability of the entire premix 12 and prevents the premix 12 from deforming. Furthermore, the air guide channel 121 is located between the upper sealing plate 123 and the lower sealing plate 125, which allows the mixed gas to be mixed through the air guide channel 121, thereby improving the mixing efficiency.
[0046] To enhance the sealing effect, elastic seals can also be added to the joints.
[0047] Specifically, the lower part of the premixing chamber 11 is provided with an inwardly protruding support step 113, which supports the lower sealing plate 125. In this way, the support step 113 provides a support point for the lower sealing plate 125, and the support step 113 enhances the stability of the lower sealing plate 125, thereby also enhancing the structural stability of the entire premixing component 12. The lower sealing plate 125 is placed on the support step 113, which not only simplifies the structure but also achieves low cost. The contact surface between the support step 113 and the lower sealing plate 125 also forms a sealing area, which can prevent the mixed gas from leaking out from the gap between the premixing chamber 11 and the lower sealing plate 125, ensuring the mixing effect of the gas in the premixing chamber 11 and avoiding mixed gas leakage.
[0048] Specifically, the upper sealing plate 123 includes an upper sealing plate body 123a located above the sealed air guide channel 121 and an inner sealing plate 123b located inside the air guide channel 121. The inner sealing plate 123b is disposed inside a plurality of air guide plates 124 and connected to the air guide plates 124. The upper end of the inner sealing plate 123b is connected to the upper sealing plate body 123a.
[0049] The aforementioned inner sealing plate 123b provides a seal for the air guide channel 121. Since the inner sealing plate 123b is connected to the inner side of the air guide vane 124 and forms an integral part with the upper sealing plate body 123a, it effectively prevents gas from leaking out through the gap between the air guide channel 121 and the upper sealing plate 123, ensuring that gas is discharged from the air outlet. This ensures the mixing effect of the gas in the premixing chamber 11.
[0050] Furthermore, the inner sealing plate 123b enhances the connection strength of the air guide vane 124, making the entire premixing component 12 more stable and ensuring the positional and structural stability of the air guide vane 124 under conditions such as gas flow impact, thus ensuring the normal function of the air guide channel 121. Simultaneously, the inner sealing plate 123b also provides an inner wall seal, allowing the mixed gas to smoothly enter the ventilation space 100 from the air guide channel 121 along a preset path, preventing gas leakage or turbulent flow during premixing, thereby improving premixing efficiency and quality.
[0051] The premixed component 12 is a one-piece cast structure, and the inner sealing plate 123b and the air guide plate 124 both extend along the axis of the premixed component 12, which also provides convenient conditions for one-piece casting.
[0052] The premixed burner head also includes an ignition sensing needle assembly and a flame suppressor 4. The flame suppressor 4 is installed above the furnace core 3 and has several flame outlet holes 41. The furnace shell core seat 2 extends upward from the bottom of the furnace shell body 1. The furnace shell core seat 2 has a first through hole extending vertically at its center. The furnace core 3 has a second through hole extending vertically. The ignition sensing needle assembly passes through the first and second through holes and its upper part is exposed through the second through hole. The flame suppressor 4 has an annular flared structure that is larger at the top and smaller at the bottom. The outer wall of the flame suppressor 4 and the inner wall of the furnace shell body 1 form an annular flame outlet cavity that is smaller at the top and larger at the bottom. The flame outlet holes 41 are located on the side wall of the flame suppressor 4. The diameter of the flame outlet holes 41 decreases from bottom to top. The gas outlet 31 is located at the top of the furnace core 3 and communicates with the annular flame outlet cavity.
[0053] Specifically, the furnace core 3 is provided with a drain port 32 at the bottom, and the furnace shell core seat 2 is provided with a drain hole 21 that communicates with the drain port 32 at the position corresponding to the drain port 32. The premixing component 12 is provided with a clearance part 14 for avoiding the drain port 32. The clearance part 14 separates several air guides 124 in the circumferential direction so as to separate the inner mixing cavity 112a from the ventilation space 100 at the position where the clearance part 14 is provided. The clearance part 14 protrudes into the ventilation space 100 relative to the air guides 124 so as to shorten the radial dimension of the ventilation space 100 at the position where the clearance part 14 is provided and increase turbulence.
[0054] The aforementioned premixing component 12 is provided with a clearance portion 14 to avoid the drain port 32. The clearance portion 14 circumferentially blocks several air guide vanes 124, creating a non-uniform distribution structure in the circumferential direction of the ventilation space 100. Simultaneously, its protruding design into the ventilation space 100 shortens the radial dimension of this area. This design has three technical advantages: First, the connection between the drain port 32 and the drain hole 21 effectively discharges liquids generated or leaked during cooking, preventing liquid stagnation from affecting combustion stability. Second, the non-uniformly distributed circumferential ventilation space 100, combined with the protruding structure, generates local turbulence during the flow of the mixed gas, significantly enhancing the secondary mixing effect within the upper premixing chamber 111. Third, the integrated structure of the clearance portion 14 and the air guide vanes 124 can be achieved through integral casting of aluminum alloy, eliminating the need for additional processing steps and effectively reducing manufacturing costs while ensuring structural strength. This technical solution cleverly utilizes a functional structure to achieve multi-effect integration, improving mixing efficiency through airflow path optimization while ensuring the draining function, combining practicality and economy.
[0055] This embodiment also mentions a gas stove, including the aforementioned premixed burner.
[0056] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.
Claims
1. A premixed burner head, comprising a furnace shell body, a furnace shell core seat, and a furnace core, wherein the furnace shell core seat is disposed inside the furnace shell body, the furnace core is installed above the furnace shell core seat, and the furnace shell body, the furnace shell core seat, and the furnace core form a premixing cavity, characterized in that... The premixing chamber is equipped with a premixing component, which divides the premixing chamber into an upper premixing chamber and a lower premixing chamber. The furnace core is provided with a gas outlet communicating with the upper premixing chamber, and the furnace shell body is provided with a gas inlet communicating with the lower premixing chamber. A ventilation space is formed at the bottom of the upper premixing chamber. The premixing component is provided with a number of air guide channels circumferentially spaced around the axis of the premixing component. The air inlet of the air guide channel is located at the bottom of the air guide channel and communicates with the lower premixing chamber. The ventilation space is located radially outside the air guide channel, and the air outlet of the air guide channel faces the ventilation space and communicates with the ventilation space.
2. The premixed burner head according to claim 1, characterized in that, At least one air guide channel is radially deflected relative to the premixing chamber so that the mixed gas entering the upper premixing chamber through the air guide channel outlet rotates counterclockwise around the axis of the premixing chamber.
3. A premixed burner head according to claim 2, characterized in that, All air guide channels deflect in the same radial direction relative to the premixing chamber.
4. A premixed burner head according to claim 1, characterized in that, The premixed component includes an upper sealing plate and several air guide vanes connected below the upper sealing plate. The air guide vanes are circumferentially spaced around the axis of the premixed component, and an air guide channel is formed between two adjacent air guide vanes.
5. A premixed burner head according to claim 4, characterized in that, The premixed component also includes a lower sealing plate, which is a ring structure and located outside the air guide vanes and the air inlet of the air guide channel. Several air guide vanes are connected to the lower sealing plate, and the air outlet of the air guide channel is located between the upper sealing plate and the lower sealing plate. The lower sealing plate is connected to the furnace shell body.
6. A premixed burner head according to claim 5, characterized in that, The lower part of the premixing chamber is provided with an inwardly protruding support step, which supports the lower sealing plate.
7. A premixed burner head according to claim 4, characterized in that, The upper sealing plate includes an upper sealing plate body located above the air guide channel and an inner sealing plate located inside the air guide channel. The inner sealing plate is disposed inside a plurality of air guide plates and connected to the air guide plates. The upper end of the inner sealing plate is connected to the upper sealing plate body.
8. A premixed burner head according to any one of claims 1 to 7, characterized in that, The premixed component is a one-piece cast structure.
9. A premixed burner head according to any one of claims 1 to 7, characterized in that, It also includes an ignition sensing needle assembly and a flame suppressor. The flame suppressor is installed above the furnace core and has several flame outlet holes. The furnace core seat has a first through hole extending vertically at its center, and the furnace core has a second through hole extending vertically. The ignition sensing needle assembly passes through the first and second through holes and its upper part protrudes from the second through hole. The flame suppressor has an annular flared structure that is larger at the top and smaller at the bottom. An annular flame outlet cavity, which is smaller at the top and larger at the bottom, is formed between the outer wall of the flame suppressor and the inner wall of the furnace body. The flame outlet holes are located on the side wall of the flame suppressor, and the diameter of the flame outlet holes decreases from bottom to top. The gas outlet is located at the top of the furnace core and communicates with the annular flame outlet cavity.
10. A gas stove, characterized in that, The gas stove is equipped with a premixed burner head as described in any one of claims 1 to 9.