Firepower-enhanced upper air inlet burner

Abstract

The utility model discloses a firepower enhancement type upper air inlet burner which comprises a base and a support arranged on the base, a first air inlet nozzle and a second air inlet nozzle are arranged on the base, and a first injection pipe corresponding to the first air inlet nozzle and a second injection pipe corresponding to the second air inlet nozzle are arranged on the support. The first injection pipe and the second injection pipe each comprise a horn mouth section, a transition section and an inner diameter expanding bent pipe section, each transition section comprises a straight barrel section and an inner diameter expanding conical pipe section, and reinforcing ribs are arranged along the junctions of the outer walls of the first injection pipe and the second injection pipe and the support. Through the arrangement of the horn mouth section, the transition section and the inner diameter expanding bent pipe section, the primary air injection capacity and the mixing capacity are improved, and the combustion performance of the combustor is met. By means of the arrangement of the reinforcing ribs, the strength of the first injection pipe and the strength of the second injection pipe are enhanced, the deformation of the first injection pipe and the deformation of the second injection pipe are reduced, the combustion effect of the combustor is improved, and meanwhile the service life of the combustor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of stoves, in particular to a firepower-enhanced upper air-inlet burner. Background Art

[0002] At present, many gas stoves have begun to use fully top-inlet burners. Since the primary and secondary air required for combustion in the fully top-inlet burners come from the upper part of the stove panel, the chassis of the gas stove can be fully sealed. Compared with the traditional bottom-inlet burner, the fully top-inlet burner is not only safer to use, but also can effectively solve the problem of the stove being shut down due to opening and closing the cabinet door.

[0003] The working principle of the upper air inlet burner is: the gas flows out of the nozzle at a certain pressure and a certain flow rate, enters the ejector tube, and relies on the ejection effect of the gas's own energy to attract a certain amount of surrounding air, which is called "primary air". The primary air and gas are mixed in the ejector tube and the burner mixing chamber, and then flow out through the fire hole to burn. During the combustion process, air is attracted from around the flame to assist combustion, and this part of air is called "secondary air".

[0004] A top air inlet burner disclosed in a Chinese utility model patent (publication number: CN205245173U) includes a base, a burner base and an annular upper cover, the base is fixedly connected to the burner base and an installation space is provided between the base and the burner base, the upper end of the burner base is provided with an annular groove matched with the upper cover, and the annular groove is provided with two lower parts of ejector tubes formed by downward depression; the two lower parts of the ejector tubes are centrally symmetrically arranged, the lower end surface of the upper cover is connected with the upper part of the ejector tube, when the upper cover is fixed to the burner base, the lower part of the ejector tube and the upper part of the ejector tube are combined to form an ejector tube, the axis of the ejector tube is spiral, the lower end of the ejector tube extends out of the burner base into the installation space, the base is provided with a gas channel, the outlet end of the combustion channel is arranged opposite to the inlet of the ejector tube, and the upper cover is provided with a gas hole. It adopts a combined ejector tube, and the ejector tube is directly connected to the annular groove, so that the ejector tube structure is reasonable and the gas ejection effect is good.

[0005] However, the upper air inlet burner disclosed in the above prior art has the following disadvantages:

[0006] ① The ejection capacity of the ejector tube is limited, and the primary air ejection capacity and mixing capacity are low;

[0007] ② The thickness of the ejector tube is quite different from the overall thickness of the support, and the expansion ratio is quite different when heated. Over time, the ejector tube is prone to deformation or even cracking. The inflowing gas will reduce the flow rate due to these deformed inner wall surfaces or cracks, thereby affecting the combustion effect of the burner.

[0008] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0009] The purpose of the utility model is to provide a firepower-enhanced upper air inlet burner in view of the defects and shortcomings of the prior art, which improves the primary air injection capacity and mixing capacity through the arrangement of the bell mouth section, the gradual change section and the inner diameter enlarged curved pipe section, and satisfies the combustion performance of the burner. The strength of the first ejector tube and the second ejector tube is enhanced by the arrangement of the reinforcing ribs, and the deformation of the first ejector tube and the second ejector tube is reduced, thereby improving the combustion effect of the burner and also increasing the service life of the burner.

[0010] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0011] A firepower-enhanced upper air intake burner comprises a base and a bracket arranged on the base, a primary air intake space is formed between the base and the bracket, a first air intake nozzle and a second air intake nozzle are arranged on the base, a first ejector tube corresponding to the first air intake nozzle and a second ejector tube corresponding to the second air intake nozzle are arranged on the bracket, an outer annular groove, a middle annular groove and an inner annular groove are arranged in sequence from the outer edge to the center of the bracket, the outer annular groove is communicated with the first air intake nozzle through the first ejector tube, and the outer annular groove is communicated with the second air intake nozzle through the second ejector tube, the first ejector tube and the second ejector tube both comprise a bell mouth section, a gradual section and an inner diameter enlarged curved tube section, the inner diameters of the bell mouth section and the inner diameter enlarged curved tube section are both larger than the inner diameter of the gradual section, the gradual section comprises a straight tube section and an inner diameter enlarged conical tube section, the bell mouth sections of the first ejector tube and the second ejector tube are arranged in opposite directions, and a raised, integrally formed reinforcing rib is provided along the junction of the outer wall of the first ejector tube and the second ejector tube and the bracket.

[0012] Furthermore, a first transition surface is provided at the junction between the reinforcing rib and the first ejector tube and the second ejector tube, and the first transition surface is a curved surface or an inclined surface.

[0013] Furthermore, a second transition surface is provided at the junction of the reinforcing rib and the bracket, and the second transition surface is a curved surface or an inclined surface.

[0014] Furthermore, a chamfer is provided at the junction of the first transition surface and the second transition surface.

[0015] Furthermore, the outer annular groove is provided with a first flow guiding inclined surface corresponding to the first ejector tube and a second flow guiding inclined surface corresponding to the second ejector tube.

[0016] Furthermore, the outer annular groove is also provided with a first slope surface corresponding to the first flow guiding slope surface and a second slope surface corresponding to the second flow guiding slope surface.

[0017] Furthermore, the base is also provided with a central ejection tube, and the bracket is also provided with a central air inlet nozzle corresponding to the central ejection tube. The inner annular groove is connected with the central air inlet nozzle through the central ejection tube, and a secondary air inlet is provided at the center of the bracket.

[0018] Furthermore, an ignition needle mounting seat and a thermocouple mounting seat are provided on the base, and an ignition needle mounting hole for mounting the ignition needle mounting seat and a thermocouple mounting hole for mounting the thermocouple mounting seat are provided on the middle annular groove.

[0019] After adopting the above structure, the utility model has the following beneficial effects:

[0020] ① The utility model discloses a firepower-enhanced upper air intake burner, wherein the first ejector tube and the second ejector tube both include a bell mouth section, a gradient section and an inner diameter enlarged curved tube section, the inner diameters of the bell mouth section and the inner diameter enlarged curved tube section are both larger than the inner diameter of the gradient section, the gradient section includes a straight tube section and an inner diameter enlarged conical tube section, and the bell mouth sections of the first ejector tube and the second ejector tube are arranged in opposite directions. Through the arrangement of the bell mouth section, the gradient section and the inner diameter enlarged curved tube section, a first air intake channel and a second air intake channel with an inner diameter from "coarse" to "fine" and then to "coarse" are formed in the first ejector tube and the second ejector tube, realizing the process of first contraction and acceleration, then mixing, and finally deceleration and pressurization, thereby improving the primary air ejection capacity and mixing capacity, and meeting the combustion performance of the burner.

[0021] ② The utility model discloses a firepower-enhanced upper air-inlet burner, and reinforcement ribs are provided along the junction of the outer wall of the first ejector tube and the second ejector tube and the bracket. The reinforcement ribs are provided to enhance the strength of the first ejector tube and the second ejector tube, and reduce the deformation and even cracking of the ejector tube caused by the large difference in thickness between the first ejector tube and the second ejector tube and the overall thickness of the bracket and the large difference in expansion ratio when heated. This ensures the smoothness and sealing of the inner wall of the first air inlet channel and the second air inlet channel, increases the gas flow rate, and thus improves the combustion effect of the burner, while also increasing the service life of the burner. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present utility model, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings in the following description are some implementation methods of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2The utility model Figure 1 A magnified schematic diagram of point A;

[0025] Figure 3 It is a three-dimensional structural schematic diagram of the base of the utility model;

[0026] Figure 4 It is a bottom view of the bracket of the utility model;

[0027] Figure 5 The utility model Figure 4 A cross-sectional view at AA;

[0028] Figure 6 It is a three-dimensional schematic diagram of the bracket of the utility model (the first ejection tube cover and the second ejection tube cover are not shown);

[0029] Figure 7 It is a bottom view of the first ejector tube cover of the utility model;

[0030] Figure 8 It is a three-dimensional schematic diagram of the first ejector tube cover of the utility model;

[0031] Fig. 9 It is a top view of the bracket of the utility model;

[0032] Fig.10 The utility model Fig. 9 Cross-sectional view at BB;

[0033] Figures 1 to 10 The bid number is:

[0034] 1. Base; 11. First air inlet nozzle; 12. Second air inlet nozzle; 13. Center air inlet nozzle; 14. Primary air inlet space; 15. Ignition needle mounting seat; 16. Thermocouple mounting seat; 2. Bracket; 21. First ejector tube; 211. Bell mouth section; 212. Gradient section; 2121. Straight section; 2122. Cone tube section with enlarged inner diameter; 213. Bend tube section with enlarged inner diameter; 214. Concave portion of first ejector tube; 2141. Step portion; 2142. Positioning column; 215. First ejector tube cover; 2151. Abutment surface; 2152. Mounting hole; 216. First Intake channel; 22, second ejector tube; 221, second ejector tube recess; 222, second ejector tube cover; 223, second intake channel; 23, outer annular groove; 231, first guide slope; 232, second guide slope; 233, first slope; 234, second slope; 24, middle annular groove; 241, ignition needle mounting hole; 242, thermocouple mounting hole; 25, inner annular groove; 251, slope; 26, center ejector tube; 27, secondary air inlet; 3, reinforcing ribs; 31, first transition surface; 32, second transition surface; 33, chamfer. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0036] In the description of the present invention, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0037] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In the present invention, unless otherwise clearly defined and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this utility model are only for illustrative purposes and do not represent the only implementation method.

[0041] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0042] like Figures 1 to 10 As shown, a firepower enhanced upper air inlet burner comprises a base 1 and a bracket 2 arranged on the base 1, a primary air inlet space 14 is formed between the base 1 and the bracket 2, a first air inlet nozzle 11 and a second air inlet nozzle 12 are arranged on the base 1, a first ejector tube 21 corresponding to the first air inlet nozzle 11 and a second ejector tube 22 corresponding to the second air inlet nozzle 12 are arranged on the bracket 2, an outer annular groove 23, a middle annular groove 24 and an inner annular groove 25 are arranged on the bracket 2 in sequence from the outer edge to the center, the outer annular groove 23 is connected to the first air inlet nozzle 11 through the first ejector tube 21, and the outer annular groove 23 is connected to the second air inlet nozzle 12 through the second ejector tube 22 The first ejector tube 21 and the second ejector tube 22 both include a bell-mouth section 211, a gradient section 212 and an inner diameter enlarged curved tube section 213. The inner diameters of the bell-mouth section 211 and the inner diameter enlarged curved tube section 213 are both larger than the inner diameter of the gradient section 212. The gradient section 212 includes a straight tube section 2121 and an inner diameter enlarged conical tube section 2122. The bell-mouth sections 211 of the first ejector tube 21 and the second ejector tube 22 are arranged in opposite directions. A raised, integrally formed reinforcing rib 3 is provided at the junction of the outer wall of the first ejector tube 21 and the second ejector tube 22 and the bracket 2.

[0043] Based on the above embodiments, the utility model aims to provide a firepower-enhanced upper air intake burner, wherein the first ejector tube 21 and the second ejector tube 22 both include a bell mouth section 211, a gradient section 212 and an inner diameter enlarged curved tube section 213, the inner diameters of the bell mouth section 211 and the inner diameter enlarged curved tube section 213 are both larger than the inner diameter of the gradient section 212, the gradient section 212 includes a straight tube section 2121 and an inner diameter enlarged conical tube section 2122, and the bell mouth sections 211 of the first ejector tube 21 and the second ejector tube 22 are arranged in opposite directions. Through the arrangement of the bell mouth section 211, the gradient section 212 and the inner diameter enlarged curved tube section 213, a first air intake channel 216 and a second air intake channel 223 with an inner diameter from "coarse" to "fine" and then to "coarse" are formed in the first ejector tube 21 and the second ejector tube 22, realizing the process of first contraction and acceleration, then mixing, and finally deceleration and pressurization, improving the primary air ejection capacity and mixing capacity, and meeting the combustion performance of the burner. In this embodiment, preferably, the gradient section 212 is provided with a straight section 2121, and the setting of the straight section 2121 further improves the ejection capacity. When in use, the gas is ejected from the first air inlet nozzle 11 and the second air inlet nozzle 12 respectively, and the gas flows in through the bell-mouth section 211. Since the inner diameter of the gradient section 212 is smaller than the inner diameter of the bell-mouth section 211, the gas flows through the gradient section 212, and the flow rate increases. Low pressure will be generated near the high-speed flowing gas, thereby generating an adsorption effect, adsorbing the surrounding air, ensuring the primary air ejection capacity, and increasing the mixing degree of gas and air. At the same time, since the first ejector tube 21 and the second ejector tube 22 are double-helical and reversely arranged, when the mixed gas of gas and air enters the outer annular groove 23 from the first ejector tube 21 and the second ejector tube 22, a 360° rotating flow type secondary mixing can be performed in the outer annular groove 23, and the mixing is more sufficient and uniform, so that the burner has high combustion efficiency. Reinforcement ribs 3 are provided along the junctions of the outer walls of the first ejector tube 21 and the second ejector tube 22 and the bracket 2. The provision of the reinforcement ribs 3 enhances the strength of the first ejector tube 21 and the second ejector tube 22, reduces the deformation and even cracking of the first ejector tube 21 and the second ejector tube 22 caused by the large difference in thickness between the first ejector tube 21 and the second ejector tube 22 and the overall thickness of the bracket 2 and the large difference in expansion ratio when heated. This ensures the smoothness and sealing of the inner walls of the first air inlet channel 216 and the second air inlet channel 223, increases the flow rate of the gas, and thus improves the combustion effect of the burner, while also increasing the service life of the burner. In this embodiment, preferably, the first ejector tube 21 includes a first ejector tube recess 214 integrally formed on the bracket 2 and a first ejector tube cover 215 cooperating with the first ejector tube recess 214, and the second ejector tube 22 includes a second ejector tube recess 221 integrally formed on the bracket 2 and a second ejector tube cover 222 cooperating with the second ejector tube recess 221.Steps 2141 are provided along the upper edges of the inner walls of the first ejector tube recess 214 and the second ejector tube recess 221. The first ejector tube cover 215 and the second ejector tube cover 222 are provided with abutting surfaces 2151 that abut against the step 2141. The inner wall of the first ejector tube cover 215 and the inner wall of the first ejector tube recess 214 cooperate to form a first air inlet channel 216 with a smooth inner wall, and the inner wall of the second ejector tube cover 222 cooperates with the inner wall of the second ejector tube recess 221 to form a second air inlet channel 223 with a smooth inner wall. A plurality of positioning posts 2142 are provided at the bottom end of the bracket 2, and a plurality of mounting holes 2152 that correspond to the positioning posts 2142 are provided at the first ejector tube cover 215 and the second ejector tube cover 222. Such as. Figure 6 , Figure 8 , Fig.10 As shown, the first ejector tube cover 215 cooperates with the first ejector tube lower recess 214 to form the first air intake channel 216, and the second ejector tube cover 222 cooperates with the second ejector tube lower recess 221 to form the second air intake channel 223. During processing, the first ejector tube cover 215, the second ejector tube cover 222, the first ejector tube lower recess 214, and the second ejector tube lower recess 221 can be processed separately, and then the first ejector tube 21 and the second ejector tube 22 are formed by pressing and other processes. Under the premise of ensuring the pipeline contours of the first air intake channel 216 and the second air intake channel 223, the burner structure is simple and easy to manufacture and assemble. The abutting surface 2151 and the step portion 2141 are matched and fitted, so that after the first ejector tube cover 215 is assembled with the first ejector tube lower concave portion 214, an effectively sealed first air inlet passage 216 with a smooth inner wall can be obtained; after the second ejector tube cover 222 is assembled with the second ejector tube lower concave portion 221, an effectively sealed second air inlet passage 223 with a smooth inner wall can be obtained. The bottom end of the bracket 2 is provided with a plurality of positioning posts 2142, and the first ejector tube cover 215 and the second ejector tube cover 222 are both provided with a plurality of mounting holes 2152 corresponding to the positioning posts 2142. The first ejector tube cover 215 and the second ejector tube cover 222 can be quickly positioned during installation through the cooperation between the positioning posts 2142 and the mounting holes 2152, thereby improving the installation speed and making the first ejector tube cover 215 and the second ejector tube cover 222 more secure after installation and not easy to fall off.

[0044] As another preferred embodiment of the present invention, the first transition surface 31 is provided at the junction of the reinforcing rib 3 and the first ejection tube 21 and the second ejection tube 22. The first transition surface 31 is a curved surface or an inclined surface. The second transition surface 32 is provided at the junction of the reinforcing rib 3 and the bracket 2. The second transition surface 32 is a curved surface or an inclined surface. A chamfer 33 is provided at the junction of the first transition surface 31 and the second transition surface. In this embodiment, Figure 1 , Fig.10As shown, the design of the first transition surface 31 allows the reinforcing rib 3 to be smoothly connected to the first ejection tube 21 and the second ejection tube 22, and the design of the second transition surface 32 allows the reinforcing rib 3 to be smoothly connected to the bracket 2. At the same time, the design of the arc surface or the inclined surface makes it easier to demould the product during production. The chamfer 33 set at the junction of the first transition surface 31 and the second transition surface 32 makes the reinforcing rib 3 more rounded as a whole, avoiding scratches on the user by the edges and corners, and also makes the burner more beautiful in appearance.

[0045] As another preferred embodiment of the present invention, the outer annular groove 23 is provided with a first guide slope 231 corresponding to the first ejector tube 21 and a second guide slope 232 corresponding to the second ejector tube 22. The outer annular groove 23 is also provided with a first slope 233 corresponding to the first guide slope 231 and a second slope 234 corresponding to the second guide slope 232. Figure 6 , Fig. 9 As shown, the arrangement of the first guide slope 231 and the second guide slope 232 reduces the impact force of the gas when it enters the outer annular groove 23, and the first guide slope 231 and the second guide slope 232 reduce the resistance of the gas and air when they are mixed in a rotating flow, ensuring that the gas and air can be evenly mixed in the outer annular groove 23. In this embodiment, preferably, the outer annular groove 23 is further provided with a first slope 233 corresponding to the first guide slope 231 and a second slope 234 corresponding to the second guide slope 232. The arrangement of the first slope 233 and the second slope 234 further reduces the resistance of the gas and air when they are mixed in a rotating flow, and better ensures that the gas and air can be evenly mixed in the outer annular groove 23.

[0046] As another preferred embodiment of the present invention, the base 1 is further provided with a central ejection tube 26, the bracket 2 is further provided with a central air inlet nozzle 13 corresponding to the central ejection tube 26, the inner annular groove 25 is connected with the central air inlet nozzle 13 through the central ejection tube 26, and a secondary air inlet 27 is provided at the center of the bracket 2. Figure 3 , Figure 4As shown, when in use, the gas is ejected from the first air inlet nozzle 11 and the second air inlet nozzle 12 respectively, and enters the outer annular groove 23 through the first ejector tube 21 and the second ejector tube 22. Therefore, the gas ejected from the first ejector tube 21 and the second ejector tube 22 will flow along the circumference of the outer annular groove 23, accelerating the mixing speed of the gas and air. The mixed gas burns in the outer annular groove 23 to form an outer ring fire; at the same time, the gas is ejected from the central air inlet nozzle 13, enters the inner annular groove 25 through the central ejector tube 26 to burn, forming an inner ring fire. Finally, a double-ring fire combustion effect is formed to improve the combustion efficiency of the burner. A secondary air inlet 27 is provided at the center of the bracket 2. The secondary air inlet 27 increases the air intake, ensures that the secondary air is sufficient, and the burner burns fully. In this embodiment, preferably, the inner annular groove 25 is set with a slope 251 that is low at one end close to the central ejector tube 26 and high at the end away from the central ejector tube 26. As shown Figure 5 , Fig.10 As shown, the setting of the slope 251 is used to guide the gas coming in from the central ejector pipe 26 to flow upward in a rotation along the left and right sides. The gas flows smoothly during the rotation and upward process and can be well mixed with the air, thereby effectively improving the mixing ratio of the gas and air, and improving the ejection performance of the inner annular groove 25 of the burner and the thermal efficiency of the whole machine.

[0047] As another preferred embodiment of the present invention, the base 1 is provided with an ignition needle mounting seat 15 and a thermocouple mounting seat 16, and the middle annular groove 24 is provided with an ignition needle mounting hole 241 for mounting the ignition needle mounting seat 15 and a thermocouple mounting hole 242 for mounting the thermocouple mounting seat 16. Figure 3 , Figure 4 As shown, the ignition needle is used to ignite the gas, and the thermocouple can quickly cut off the gas after the flame is accidentally extinguished to prevent gas leakage. The ignition needle mounting seat 15 cooperates with the ignition needle mounting hole 241, and the thermocouple mounting seat 16 cooperates with the thermocouple mounting hole 242 to play a positioning role when the bracket 2 and the base 1 are installed, thereby improving the installation efficiency.

[0048] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present utility model.

Claims

1. A firepower-enhanced upper air-inlet burner, comprising a base (1) and a bracket (2) arranged on the base (1), a primary air-inlet space (14) being formed between the base (1) and the bracket (2), a first air-inlet nozzle (11) and a second air-inlet nozzle (12) being arranged on the base (1), a first ejector tube (21) corresponding to the first air-inlet nozzle (11) and a second ejector tube (22) corresponding to the second air-inlet nozzle (12) being arranged on the bracket (2), an outer annular groove (23), an intermediate annular groove (24) and an inner annular groove (25) being arranged on the bracket (2) from the outer edge to the center, the outer annular groove (23) being connected to the first air-inlet nozzle (11) through the first ejector tube (21), and the outer annular groove (23) being connected to the second air-inlet nozzle (12) through the second ejector tube (22), characterized in that: The first ejector tube (21) and the second ejector tube (22) both comprise a bell mouth section (211), a gradient section (212) and an inner diameter enlarged curved tube section (213); the inner diameters of the bell mouth section (211) and the inner diameter enlarged curved tube section (213) are both larger than the inner diameter of the gradient section (212); the gradient section (212) comprises a straight tube section (2121) and an inner diameter enlarged conical tube section (2122); the bell mouth sections (211) of the first ejector tube (21) and the second ejector tube (22) are arranged in opposite directions; and protruding, integrally formed reinforcing ribs (3) are provided along the junctions of the outer walls of the first ejector tube (21) and the second ejector tube (22) and the bracket (2).

2. The firepower-enhanced upward air-inlet burner according to claim 1, characterized in that: A first transition surface (31) is provided at the junction of the reinforcing rib (3) and the first ejection tube (21) and the second ejection tube (22), and the first transition surface (31) is a curved surface or an inclined surface.

3. The firepower-enhanced upward air-inlet burner according to claim 2, characterized in that: A second transition surface (32) is provided at the junction of the reinforcing rib (3) and the bracket (2), and the second transition surface (32) is a curved surface or an inclined surface.

4. The firepower-enhanced upward air-inlet burner according to claim 3, characterized in that: A chamfer (33) is provided at the junction of the first transition surface (31) and the second transition surface.

5. The firepower-enhanced upward air-inlet burner according to claim 1, characterized in that: The outer annular groove (23) is provided with a first flow guiding inclined surface (231) corresponding to the first ejector tube (21) and a second flow guiding inclined surface (232) corresponding to the second ejector tube (22).

6. The firepower-enhanced upward air-inlet burner according to claim 5, characterized in that: The outer annular groove (23) is further provided with a first slope surface (233) corresponding to the first flow guiding slope surface (231) and a second slope surface (234) corresponding to the second flow guiding slope surface (232).

7. The firepower-enhanced upward air-inlet burner according to claim 1, characterized in that: The base (1) is also provided with a central ejection tube (26), and the bracket (2) is also provided with a central air inlet nozzle (13) corresponding to the central ejection tube (26); the inner annular groove (25) is connected to the central air inlet nozzle (13) via the central ejection tube (26), and a secondary air inlet (27) is provided at the center of the bracket (2).

8. The firepower-enhanced upward air-inlet burner according to claim 1, characterized in that: An ignition needle mounting seat (15) and a thermocouple mounting seat (16) are provided on the base (1), and an ignition needle mounting hole (241) for mounting the ignition needle mounting seat (15) and a thermocouple mounting hole (242) for mounting the thermocouple mounting seat (16) are provided on the middle annular groove (24).

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