A direct injection burner

Abstract

The utility model belongs to gas -cooker technical field especially is involved a kind of direct injection type combustor. Including several groups of combustion assembly, combustion assembly is connected and fixed between through connecting piece, and combustion assembly includes fire cover and ejector pipe, and fire cover includes top and the side wall that is inclined in axial direction, and side wall and top cooperation form gas cavity, and side wall is equipped with several rows of the gas outlet passage that is communicated gas cavity and fire cover outside, and gas outlet passage is inclined in axial direction.Advantages are: multiple high combustion efficiency combustion assembly can be combined and used according to actual firepower demand, and the flexibility of combination is stronger.

Description

Technical Field

[0001] This utility model belongs to the field of gas stove technology, and in particular relates to a direct injection burner. Background Technology

[0002] A gas stove, also known as a coal gas stove, cooktop, or stove, is a kitchen appliance that uses liquefied petroleum gas (LPG), manufactured gas, or natural gas for direct-fire heating. Direct-injection burners typically have a built-in "direct-injection tube." Through a specially designed gas passage within the tube, when gas is ejected from the upward-facing nozzle, it directly draws in air at high speed within the injection tube, forming a uniform "gas-air mixture," which is then ejected through the burner cap's flame holes for combustion.

[0003] Chinese invention patent application number 2024100153763 discloses a high-power direct injection burner, which discloses a structure in which a central burner cap is used in conjunction with a central ejector and an outer ring burner cap is used in conjunction with an outer ring ejector. The central ejector includes an intake contraction section, a throat section, a diffuser section, and a cone section located at the outlet of the diffuser section. Several flame holes are opened on the top surface of the central burner cap, and the flame holes are inclined relative to the axis. The annular outer ring burner cap surrounds the central burner cap, and gas is supplied to the outer ring burner cap through the outer ring ejector.

[0004] In actual use, the flame temperature at the outer ring burner cap is lower than that at the central burner cap during combustion, resulting in more flue gas being produced. This leads to poorer combustion efficiency in the outer ring. Furthermore, the overall shape of the burner cap and the structure of the combustion chamber are cylindrical. This structure causes some of the air-fuel mixture to enter the burner cap at high speed, impacting the top and then making a bend before exiting through the flame outlet. This results in a loss of kinetic energy, affecting the smoothness and speed of the exhaust. The cylindrical burner cap also hinders secondary air replenishment during combustion, ultimately reducing combustion efficiency. In addition, the fixed layout of the inner and outer ring designs prevents modifications to the burner to meet specific needs, lacking flexibility in layout. Utility Model Content

[0005] The purpose of this invention is to address the above-mentioned problems by providing a burner with better combustion performance and more flexible layout.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A direct-injection burner includes several sets of combustion components, which are connected and fixed to each other by connectors. Each combustion component includes a burner cap and an injector tube. The burner cap covers the upper end of the injector tube. The burner cap includes a top and a side wall that is inclined in the axial direction. The side wall and the top cooperate to form a gas chamber. The side wall is provided with several rows of gas outlet channels that connect the gas chamber and the outside of the burner cap. The gas outlet channels are inclined in the axial direction.

[0007] When the gas mixture is ejected from the injector and enters the funnel-shaped combustion chamber, the flow direction of the mixture is more aligned with the inclined outlet channel, resulting in a smoother flow path and a gentler turn. This reduces the resistance to gas flow, and the lower outlet resistance means a stronger negative pressure inside the injector, allowing the gas nozzle to more effectively entrain more primary air. Simultaneously, this structure reduces the generation of vortices within the combustion chamber, enabling the gas mixture to be more evenly distributed throughout the circumference of the burner cap and ensuring more consistent composition and velocity of the gas mixture ejected from each burner hole. This results in uniform flame height and temperature throughout the entire ring, leading to stable combustion. The inclined outer wall forms a natural guide surface, allowing surrounding air to be more smoothly guided to the root of the flame as it flows towards the burner cap, improving the efficiency of secondary air replenishment. Multiple high-efficiency combustion components can be combined using connectors according to actual needs. For example, commercial applications can achieve greater firepower by increasing the number of combustion components, while residential applications can reduce the number, offering greater flexibility in combination. The design of the connectors for the combustion assembly, and the materials used, are conventional techniques in this field and will not be elaborated upon here.

[0008] In this direct-injection burner, an annular base is provided at the lower end of the side wall. The lower end of the side wall and the base cooperate to form an installation step. The inner diameter of the base is larger than the outer diameter of the upper end of the injector tube. The base is used to connect the burner cap and the injector tube. When assembling the burner cap and the injector tube, the base is fitted over the injector tube, and the installation step abuts against the top surface of the injector tube.

[0009] In this direct injection burner, the top extends inward to form a waste liquid chamber, which is cone-shaped or frustum-shaped with a smaller bottom and a larger top.

[0010] The waste liquid chamber is used to collect waste liquid dripping from the cookware, preventing waste liquid from falling into the spray and causing blockage. A conical or frustum-shaped waste liquid chamber is adopted. The inclination angle of the peripheral wall of the waste liquid chamber can be better matched with the inclination angle of the air outlet channel in this solution. The waste liquid chamber can be made deeper, increasing the capacity and reducing the cleaning frequency. At the same time, the upper surface area of ​​the waste liquid chamber can be made larger to fully cover the nozzle area, further preventing waste liquid from falling into the nozzle. If the concave waste liquid chamber is made into a cylindrical or other shapes, the distance between the bottom of the waste liquid chamber and the uppermost air outlet channel is limited, making it impossible to make the waste liquid chamber deeper.

[0011] In this direct injection burner, the outer peripheral wall of the base is provided with connecting ears. The connecting ears are used to assemble the sensing needle. When the sensing needle detects problems such as flameout, it can control the solenoid valve to cut off the gas supply to the burner, thereby improving safety.

[0012] In this direct injection burner, the gas chamber includes an inclined section and an arc-shaped section above the inclined section. The upper exhaust gas passage is connected to the arc-shaped section, and the lower exhaust gas passage is connected to the inclined section.

[0013] The hole at the lower end of the upper exhaust channel connects to the top surface of the arc-shaped structure, which is equivalent to changing the angle between the exhaust channel and the tangent of the inner circumferential wall of the side wall. This optimizes the flow path of the mixed gas and improves the mixing effect of air and fuel. At the same time, the mixed gas rushes upward with high speed and force. The exhaust channel set on the top surface of the arc can receive the mixed gas more smoothly, thereby improving the combustion effect and efficiency of the flame at the upper exhaust channel, increasing the flame temperature, and reducing the generation of flue gas.

[0014] In this direct-injection burner, a flared section is provided at the upper opening of the injector tube. The flared section can convert the dynamic pressure of the mixture in the injector tube into static pressure, and at the same time play a certain role in diffusion and guiding the mixture, so that the angle of the mixture entering the burner cap is more adapted to the tilt angle of the exhaust channel, the mixture flows more smoothly, and further improves the combustion effect and combustion efficiency.

[0015] In this direct-injection burner, the angle α between the outlet passage and the horizontal plane is 45°-50°. When the angle α between the outlet passage and the horizontal plane is 45°-50°, the outlet passage angle is closest to the angle of gas diffusion, allowing the gas to enter the gas passage directly, reducing kinetic energy loss caused by turning. The gas exiting the outlet passage has a faster velocity, a larger gas volume, and a higher combustion temperature. At the same time, the outlet velocity is greater than the combustion velocity, which also avoids backfire.

[0016] In this direct-injection burner, the lower end of the waste liquid chamber extends downward into the gas combustion chamber to form a guide block. By setting the guide block, the upward-injected mixture can be guided along the outer periphery of the inclined guide block towards the gas outlet channel, reducing the loss of gas kinetic energy, ensuring the gas outlet velocity and volume, and improving the combustion effect and combustion efficiency.

[0017] In this direct injection burner, a drainage channel is provided at the edge of the waste liquid chamber, which connects the waste liquid chamber to the outside of the burner cap. When the waste liquid chamber is full, the waste liquid can flow out from the drainage channel and through a pre-set path on the outer peripheral wall of the side wall, instead of overflowing from all directions.

[0018] Compared with existing technologies, the advantages of the center burner of this direct injection burner are: First, by further improving the burner structure, the trumpet-shaped burner and the gas chamber, combined with the inclined gas outlet channel, further improve the smoothness and efficiency of the gas mixture, thereby enhancing the combustion effect and efficiency, resulting in a higher and more stable flame temperature and less smoke.

[0019] Secondly, multiple high-efficiency combustion components can be combined and used in combination via connectors according to actual firepower requirements, resulting in greater flexibility in combination. Attached Figure Description

[0020] Figure 1 This is a perspective view of the combustion components of the direct injection burner provided by this utility model.

[0021] Figure 2 This is a cross-sectional view of the combustion assembly of the direct injection burner provided by this utility model.

[0022] Figure 3 This is a three-dimensional view of the burner cap of the direct injection burner provided by this utility model.

[0023] Figure 4 This is a cross-sectional view of the burner cap of the direct injection burner provided by this utility model. Figure 1 .

[0024] Figure 5 This is a cross-sectional view of the burner cap of the direct injection burner provided by this utility model. Figure 2 .

[0025] In the diagram, 1 is the combustion assembly; 2 is the burner cap; 21 is the top; 211 is the waste liquid chamber; 212 is the guide block; 213 is the diversion channel; 22 is the side wall; 23 is the gas chamber; 231 is the inclined part; 232 is the arc-shaped part; 24 is the gas outlet channel; 25 is the base; 251 is the mounting step; 252 is the connecting lug; 3 is the ejector tube; and 31 is the flared part. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] A direct injection burner includes several sets of combustion components 1, which are connected and fixed to each other by connectors. Multiple combustion components 1 can be combined and used according to actual needs through connectors. For example, commercial use can achieve a stronger firepower by increasing the number of combustion components 1, while household use can reduce the number of combustion components 1, making the combination more flexible. The connectors can be steel plates or similar parts. How to set the connectors is a conventional technical means in this field and will not be described in detail here.

[0028] Preferred, such as Figure 1 As shown, the combustion assembly 1 includes a flame cap 2 and an ejector tube 3. The flame cap 2 covers the upper end of the ejector tube 3, forming a complete combustion assembly 1.

[0029] Preferred, such as Figure 3-5As shown, the burner cap 2 includes a top 21 and a side wall 22 that is inclined in the axial direction. The side wall 22 and the top 21 cooperate to form a gas chamber 23. The gas chamber 23 includes an inclined portion 231 and an arc-shaped portion 232 above the inclined portion 231. An upper exhaust gas channel 24 connects to the arc-shaped portion 232, and a lower exhaust gas channel 24 connects to the inclined portion 231. Both the burner cap 2 and the gas chamber 23 are roughly funnel-shaped with a smaller top and a larger bottom. The side wall 22 is provided with several rows of exhaust gas channels 24 that connect the gas chamber 23 and the outside of the burner cap 2. The exhaust gas channels 24 are inclined in the axial direction, and the angle α between the exhaust gas channels 24 and the horizontal plane is 45°-50°. In actual use, when the gas mixture is ejected from the injector tube 3 and enters the trumpet-shaped combustion chamber 23, the direction of the gas flow is more aligned with the direction of the outlet channel 24, which is inclined at 45°-50°. This results in a smoother flow path, a gentler turn, and reduced resistance to gas flow. Lower outlet resistance means stronger negative pressure within the injector tube 3, allowing the gas nozzle to more effectively entrain more primary air. Simultaneously, this structure reduces the generation of vortices within the combustion chamber 23, enabling the gas mixture to be more evenly distributed across the circumference of the burner cap 2. It also ensures that the composition and velocity of the gas mixture ejected from each outlet channel 24 are more consistent, resulting in uniform flame height and temperature throughout the entire ring and stable combustion. The inclined outer wall forms a natural guide surface. When the surrounding air flows towards the burner cap, it is guided more smoothly to the root of the flame along this inclined surface, improving the efficiency of secondary air replenishment. At the same time, the hole at the lower end of the upper exhaust channel 24 connects to the top surface of the arc-shaped structure of the arc-shaped part 232, which is equivalent to changing the angle between the exhaust channel 24 and the tangent of the inner peripheral wall of the side wall 22, optimizing the flow path of the mixed gas, improving the mixing effect of air and fuel gas. At the same time, the mixed gas rushes upward with high speed and force. The exhaust channel 24 set on the arc-shaped top surface can receive the mixed gas more smoothly, thereby improving the combustion effect and combustion efficiency of the flame at the upper exhaust channel 24, increasing the flame temperature, and reducing the generation of smoke.

[0030] Furthermore, the lower end of the side wall 22 is provided with an annular base 25. The lower end of the side wall 22 and the base 25 cooperate to form an installation step 251. The inner diameter of the base 25 is larger than the outer diameter of the upper end of the ejector tube 3. The base 25 is used to connect the burner cap 2 and the ejector tube 3. When assembling the burner cap 2 and the ejector tube 3, the base 25 is sleeved on the outside of the ejector tube 3. The installation step 251 abuts against the top surface of the ejector tube 3. The outer peripheral wall of the base 25 is provided with a connecting ear 252 for installing a sensing needle. When the sensing needle detects problems such as flameout, it can control the solenoid valve to cut off the gas supply to the burner, thereby improving safety.

[0031] Furthermore, the top 21 extends inward to form a waste liquid chamber 211. The waste liquid chamber 211 is conical or frustum-shaped, with a smaller bottom and a larger top. A drainage groove 213 is provided on the edge of the waste liquid chamber 211, connecting the waste liquid chamber 211 to the outside of the flame cap 2. The conical or frustum-shaped waste liquid chamber 211 allows for a more suitable angle of inclination of its peripheral wall to match the inclination angle of the venting channel 24 in this design. This allows for a deeper waste liquid chamber 211, increasing its capacity and reducing [the burden on the system]. The cleaning frequency can be increased, and the upper surface area of ​​the waste liquid chamber 211 can be made larger to fully cover the nozzle area, further preventing waste liquid from falling into the nozzle. If the concave waste liquid chamber 211 is made into a cylindrical or other shape, the distance between the bottom of the waste liquid chamber 211 and the uppermost air outlet channel 24 is limited, and the waste liquid chamber 211 cannot be made deep. When the waste liquid in the waste liquid chamber 211 is full, the waste liquid can flow out from the drainage groove 213 and flow out through the preset path of the outer peripheral wall of the side wall 22, instead of overflowing from all directions.

[0032] Furthermore, the lower end of the waste liquid chamber 211 extends downward into the combustion chamber 23 to form a guide block 212. By setting the guide block 212, the directly injected upward mixed gas can be guided along the outer periphery of the inclined guide block 212 towards the gas outlet channel 24, reducing the loss of gas kinetic energy, ensuring the gas outlet speed and gas outlet volume, improving the combustion effect and combustion efficiency. Moreover, this setting makes the burner cap 2 more integrated and the structure simpler.

[0033] Furthermore, such as Figure 2 As shown, a flared opening 31 is provided at the upper opening of the ejector tube 3. The flared opening 31 can convert the dynamic pressure of the mixture in the ejector tube 3 into static pressure, and at the same time play a certain role in diffusion and guiding the mixture, so that the angle of the mixture entering the burner cap 2 is more compatible with the tilt angle of the exhaust channel 24, the mixture flows more smoothly, and further improves the combustion effect and combustion efficiency.

[0034] The specific embodiments described herein are merely illustrative examples of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from this utility model or exceeding the scope defined by the appended claims.

[0035] Although this document uses a considerable amount of technical terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would be contrary to the purpose of this invention.

Claims

1. A direct-injection burner, characterized in that: It includes several sets of combustion components (1), which are connected and fixed by connectors. The combustion component (1) includes a flame cap (2) and an ejector tube (3). The flame cap (2) covers the upper end of the ejector tube (3). The flame cap (2) includes a top (21) and a side wall (22) that is inclined in the axial direction. The side wall (22) and the top (21) cooperate to form a gas chamber (23). Both the flame cap (2) and the gas chamber (23) are funnel-shaped with a smaller top and a larger bottom. The side wall (22) is provided with several rows of gas outlet channels (24) that connect the gas chamber (23) and the outside of the flame cap (2). The gas outlet channels (24) are inclined in the axial direction.

2. The direct injection burner according to claim 1, characterized in that, The lower end of the sidewall (22) is provided with an annular base (25). The lower end of the sidewall (22) and the base (25) cooperate to form an installation step (251). The inner diameter of the base (25) is larger than the outer diameter of the upper end of the ejector tube (3).

3. The direct injection burner according to claim 1, characterized in that, The top (21) extends inward to form a waste liquid cavity (211), which is cone-shaped or frustum-shaped with a smaller bottom and a larger top.

4. The direct injection burner according to claim 2, characterized in that, The outer peripheral wall of the base (25) is provided with connecting ears (252).

5. The direct injection burner according to claim 1, characterized in that, The gas chamber (23) includes an inclined portion (231) and an arc-shaped portion (232) above the inclined portion (231). The upper exhaust gas passage (24) is connected to the arc-shaped portion (232), and the lower exhaust gas passage (24) is connected to the inclined portion (231).

6. The direct injection burner according to claim 1, characterized in that, The ejector tube (3) has a flared opening (31) at the upper part of its opening.

7. The direct injection burner according to claim 6, characterized in that, The angle α between the air outlet channel (24) and the horizontal plane is 45°-50°.

8. The direct injection burner according to claim 3, characterized in that, The lower end of the waste liquid chamber (211) extends downward into the gas combustion chamber (23) to form a guide block (212).

9. The direct injection burner according to claim 3, characterized in that, The edge of the waste liquid chamber (211) is provided with a drainage groove (213), which connects the waste liquid chamber (211) and the outside of the fire cap (2).

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