Furnace end with secondary boosting function

Abstract

The furnace end with the secondary boosting function comprises an inner injection pipe, an outer injection pipe and a furnace base, the furnace base is composed of a central pipe and an outer sleeve, the outer sleeve coaxially surrounds the peripheral side of the central pipe, an outer ring gas channel is formed between the central pipe and the outer sleeve, an inner ring gas channel is formed in the middle of the central pipe in the axial direction, and the outer ring gas channel is communicated with the inner ring gas channel. The ends, away from the furnace base, of the inner injection pipe and the outer injection pipe are each provided with a first boosting structure, and the end, close to the outer sleeve, of the outer injection pipe is provided with a second boosting structure. The first boosting structures at the ends of the inner injection pipe and the outer injection pipe are used for primarily accelerating airflow, the second boosting structure at the near end of the outer injection pipe is matched to achieve secondary boosting, the double structures are overlapped to form strong negative pressure suction force, the injection strength is greatly improved, and the boosting short plate of a traditional single horn mouth structure is effectively made up.

Description

Technical Field

[0001] This invention relates to the field of stainless steel furnace head device technology, specifically to a furnace head with a secondary boosting function. Background Technology

[0002] Stainless steel burner heads are widely used in various combustion equipment such as household gas stoves and commercial stoves due to their corrosion resistance, high temperature resistance, and high structural strength. The rationality of their ejector structure directly affects the mixing efficiency of gas and air, which in turn determines the completeness of combustion, thermal efficiency, and safety of use.

[0003] However, existing traditional stainless steel burners generally only have a single injection port, and this port often uses a simple flared structure. Limited by this structural design, the airflow acceleration effect of a single flared injection port is limited, failing to create a sufficiently strong negative pressure suction. This results in insufficient air intake and uneven mixing of fuel and air, meaning the injection intensity (boost intensity) is insufficient to meet the demands of efficient combustion. This not only leads to fuel waste and low thermal efficiency but may also produce harmful gases such as carbon monoxide due to incomplete combustion, posing safety hazards. Furthermore, it affects the stable combustion performance of the stove, making it difficult to meet the modern requirements for efficient, environmentally friendly, and safe stoves. Summary of the Invention

[0004] (a) Technical issues The present invention aims to provide a burner head with a secondary boosting function, which solves the problem of insufficient boosting strength of the single horn-shaped ejector structure of traditional stainless steel burners, and improves the mixing efficiency of gas and air and combustion performance.

[0005] (II) Technical Content To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: a furnace head with a secondary boosting function, comprising an inner ejector tube, an outer ejector tube, and a furnace base. The furnace base is composed of a central tube and an outer sleeve tube. The outer sleeve tube is coaxially wrapped around the outer periphery of the central tube, and an outer ring gas passage is formed between the central tube and the outer sleeve tube. An inner ring gas passage is formed axially in the middle of the central tube. The inner ring gas passage is connected to one end of the inner ejector tube, and the outer ring gas passage is connected to one end of the outer ejector tube. A first boosting structure is provided at the end of the inner ejector tube and the outer ejector tube away from the furnace base. A second boosting structure is provided at the end of the outer ejector tube near the outer sleeve tube. The first boosting structure is a bell-shaped diameter reduction structure, and the second boosting structure is a Venturi tube structure. An installation bracket is fixedly installed at the bottom of the furnace base, and an irregular damper is fixedly assembled on the outer side of the first boosting structure.

[0006] Furthermore, the second booster structure includes, in sequence along the airflow intake direction, a constriction section, a throat, and an expansion section. Furthermore, in the bell-shaped diameter reduction structure of the first booster structure, the diameter of its inlet end is larger than the diameter of its outlet end, and the inlet end and the outlet end are connected by a smoothly transitioning conical surface.

[0007] Furthermore, the irregular damper has several ventilation holes evenly distributed circumferentially.

[0008] Furthermore, the mounting bracket is formed by bending a metal sheet, and the mounting bracket has at least two fixing holes for fixed installation.

[0009] (III) Technical Effects Compared with existing technologies, the advantages of this invention are as follows: The first booster structure (flared-mouth diameter reduction structure) at the ends of the inner and outer ejector tubes initially accelerates the airflow, while the second booster structure (Venturi tube) near the outer ejector tube provides secondary boosting. The superposition of these two structures creates a strong negative pressure suction, significantly improving the ejection intensity and effectively compensating for the shortcomings of traditional single-flared-mouth structures. Under this strong boosting effect, the air intake is sufficient, resulting in a more uniform mixture of fuel gas and air, laying the foundation for complete combustion and avoiding fuel waste caused by uneven mixing. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of a furnace head with a secondary booster function according to the present invention. Figure 1 .

[0011] Figure 2 This is a three-dimensional structural diagram of a furnace head with a secondary booster function according to the present invention. Figure 2 .

[0012] Figure 3 This is a three-dimensional structural diagram of a furnace head with a secondary booster function according to the present invention. Figure 3 .

[0013] Figure 4 This is a schematic diagram of the main structure of a furnace head with a secondary boosting function according to the present invention.

[0014] Figure 5 This is a right-side structural schematic diagram of a furnace head with a secondary boosting function according to the present invention.

[0015] Figure 6 This is a top view schematic diagram of a furnace head with a secondary boosting function according to the present invention.

[0016] Figure 7 This is a schematic diagram of the cross-sectional structure of a furnace head with a secondary boosting function according to the present invention.

[0017] As shown in the figure: 1. Inner ejector tube; 2. Outer ejector tube; 3. Furnace base; 4. Mounting bracket; 5. Irregular damper; 21. First booster structure; 22. Second booster structure; 31. Central tube; 32. Outer sleeve tube; 33. Outer ring air passage; 34. Inner ring air passage; 41. Fixing hole; 51. Ventilation hole; 221. Contraction section; 222. Throat; 223. Expansion section. Detailed Implementation

[0018] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limiting this invention.

[0019] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] Combined with appendix Figure 1 To be continued Figure 6 A furnace head with a secondary boosting function includes an inner ejector tube 1, an outer ejector tube 2, and a furnace base 3. The furnace base 3 is composed of a central tube 31 and an outer sleeve 32. The outer sleeve 32 is coaxially wrapped around the outer periphery of the central tube 31, and the central tube 31 and the outer sleeve 32 form an outer ring air passage 33. An inner ring air passage 34 is axially formed in the middle of the central tube 31. The inner ring air passage 34 is connected to one end of the inner ejector tube 1, and the outer ring air passage 33 is connected to one end of the outer ejector tube 2. A first boosting structure 21 is provided at the end of the inner ejector tube 1 and the outer ejector tube 2 away from the furnace base 3. A second boosting structure 22 is provided at the end of the outer ejector tube 2 near the outer sleeve 32. The first boosting structure 21 is a bell-shaped diameter reduction structure, and the second boosting structure 22 is a Venturi tube structure. An installation bracket 4 is fixedly installed at the bottom of the furnace base 3, and an irregular damper 5 is fixedly assembled on the outer side of the first boosting structure 21.

[0022] In this embodiment, as a preferred technical solution, the second booster structure 22 includes a contraction section 221, a throat 222 and an expansion section 223 in sequence along the airflow intake direction. In the bell-shaped diameter reduction structure of the first booster structure 21, the diameter of its inlet end is larger than the diameter of its outlet end, and the inlet end and the outlet end are connected by a smoothly transitioning conical surface.

[0023] In this embodiment, as a preferred technical solution, the irregular damper 5 is provided with a plurality of ventilation holes 51 evenly distributed along the circumference, the mounting bracket 4 is formed by bending a metal plate, and the mounting bracket 4 is provided with at least two fixing holes 41 for fixed installation.

[0024] The working principle of this invention is as follows: This burner head with secondary boosting function is based on the principles of fluid dynamics acceleration and negative pressure injection. Through the "reduction acceleration effect" of the first booster structure 21 (trumpet-shaped diameter reduction structure) and the "throat negative pressure enhancement effect" of the second booster structure 22 (Venturi tube), it achieves dual acceleration injection and thorough mixing of gas and air. When the gas is transported through the inner ejector tube 1 and the outer ejector tube 2, the flow velocity is increased due to the constraint of the diameter reduction structure, forming an initial negative pressure to draw in air. The airflow in the outer ejector tube 2 is accelerated by the contraction section 221 of the second booster structure 22 and the negative pressure is enhanced by the throat 222. Finally, it is transported to the combustion end through the inner ring air passage 34 and the outer ring air passage 33. The total air intake is adjusted by the ventilation holes 51 of the irregular damper 5 to ensure combustion stability.

[0025] The working process of this invention is as follows: 1. Initial intake stage: The fuel gas enters the inner injector 1 and the outer injector 2 respectively, while the outside air enters the outer area of ​​the injector through the ventilation hole 51 of the irregular damper 5 to prepare for mixing.

[0026] 2. First booster injection: The gas flows through the end of the inner ejector tube 1 and the outer ejector tube 2 away from the furnace seat 3, through the first booster structure 21 (trumpet-mouth diameter reduction structure). Because the diameter of the inlet end is larger than the diameter of the outlet end, the gas flow velocity is significantly increased, and a preliminary negative pressure is formed in the ejector tube, which draws the air at the irregular damper 5 into the ejector tube and completes the preliminary mixing with the gas.

[0027] 3. Secondary boost enhancement: The gas-air mixture in the outer ejector tube 2 continues to flow towards the end near the outer sleeve tube 32, flows through the second booster structure 22, is further accelerated through the contraction section 221, and then is smoothly output through the expansion section 223, greatly improving the mixing uniformity; the mixed gas in the inner ejector tube 1 is directly delivered to the furnace base 3 area.

[0028] 4. Airway diversion and delivery: The mixed airflow in the inner ejector tube 1 is delivered upward through the inner ring airway 34 of the central tube 31, and the airflow in the outer ejector tube 2 is delivered upward through the outer ring airway 33 between the central tube 31 and the outer tube 32, forming a dual airflow channel with inner and outer rings.

[0029] 5. Combustion supply stage: The uniformly mixed airflow output from the inner ring air passage 34 and the outer ring air passage 33 is synchronously delivered to the combustion end of the burner head and combusted under the action of the ignition device. At the same time, the air intake area of ​​the ventilation hole 51 can be controlled by adjusting the opening of the irregular damper 5 to adapt to different combustion conditions.

[0030] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A furnace head with a secondary booster function, comprising an inner ejector tube (1), an outer ejector tube (2), and a furnace base (3), wherein the furnace base (3) is composed of a central tube (31) and an outer sleeve tube (32), the outer sleeve tube (32) being coaxially surrounding the outer periphery of the central tube (31), the central tube (31) and the outer sleeve tube (32) forming an outer annular gas passage (33), an inner annular gas passage (34) being axially formed in the middle of the central tube (31), the inner annular gas passage (34) being connected to one end of the inner ejector tube (1), and the outer annular gas passage (33) being connected to one end of the outer ejector tube (2), characterized in that: The inner ejector tube (1) and the outer ejector tube (2) are each equipped with a first booster structure (21) at the end away from the furnace base (3), and the outer ejector tube (2) is equipped with a second booster structure (22) at the end near the outer sleeve tube (32). The first booster structure (21) is a bell-mouth diameter reduction structure, and the second booster structure (22) adopts a venturi tube structure. The bottom of the furnace base (3) is fixedly installed with an installation bracket (4), and the outer side of the first booster structure (21) is fixedly equipped with an irregular damper (5).

2. The burner head with secondary boosting function according to claim 1, characterized in that, The second booster structure (22) includes, in sequence, a contraction section (221), a throat (222), and an expansion section (223) along the airflow intake direction.

3. A furnace head with a secondary booster function according to claim 1, characterized in that, In the bell-shaped reduced diameter structure of the first booster structure (21), the diameter of its inlet end is larger than the diameter of its outlet end, and the inlet end and the outlet end are connected by a smoothly transitioning conical surface.

4. A furnace head with a secondary booster function according to claim 1, characterized in that, The irregular damper (5) has several ventilation holes (51) evenly distributed in the circumferential direction.

5. A furnace head with a secondary booster function according to claim 1, characterized in that, The mounting bracket (4) is formed by bending a metal plate, and the mounting bracket (4) has at least two fixing holes (41) for fixed installation.

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