An upward air inlet burner

Abstract

The present invention relates to an upward air inlet burner, which is characterized in that: it includes a mounting base; a second gas mixing chamber arranged on the periphery of the mounting base, a second ejector tube arranged on the mounting base, and an air outlet of the second ejector tube is communicated with the second gas mixing chamber; a second injector, arranged on the mounting base and communicated with an air inlet of the second ejector tube; and a flow equalizing plate, arranged on an outer wall surface of the second gas mixing chamber and higher than the air outlet of the second ejector tube, for equalizing the flow of the gas flowing out of the second ejector tube. The flow equalizing plate has a narrow part adjacent to the air outlet of the second ejector tube. Compared with the prior art, the advantages of the present invention are that the second gas mixing chamber is provided with a flow equalizing plate, which improves the uniformity of the mixing of the primary air and the gas, increases the primary air suction rate, effectively reduces the kinetic energy loss, makes its diffusion uniform, and thus can maintain a stable and uniform flame in the fire outlet area supplied by the second gas mixing chamber to the second burner cap. As a result, the flame of the upward air inlet burner is short, uniform and powerful.

Description

Technical Field

[0001] The present invention relates to a burner of a gas cooker, and particularly to an up-draft type cooker burner with multiple nozzles. Background Art

[0002] At present, fully up-draft burners have been used in many gas cookers. Since the primary and secondary air required during combustion of the fully up-draft burner both come from the upper part of the cooker panel, the chassis of the gas cooker can be fully sealed. Compared with the traditional down-draft burner structure, the fully up-draft burner is not only safer to use but also can well solve the problem of the cooker being extinguished due to opening or closing the cabinet door. However, the traditional fully up-draft burner realizes the supplement of primary air through the gap between the mixing chamber and the base. The problem brought about by this is that there is a gap between the mixing chamber and the base. After the mounting screws of the panel are installed, the mounting screws can be seen from the outside of the burner, resulting in an unattractive appearance of the burner. Moreover, after setting a gap between the base and the mixing chamber, the overflow liquid will flow into the base and the circular basin-shaped main body located below the panel, namely the term "bottom cup", through this gap, which brings a lot of inconvenience to the user's maintenance and cleaning. And if the overflow liquid is not cleared for a long time, it will affect the normal use of the burner. In addition, the structure of the "bottom cup" often causes a sharp bend at the connection between the outlet of the ejector pipe and the mixing gas channel, significantly increasing the ejector resistance. Such a design, such as the Chinese utility model patent "Gas Burner" with the patent number ZL201120156854.0 (the authorized announcement number is CN202082922U), has a poor ejector effect. At the same time, the primary air supplemented from above the panel by this type of up-draft burner enters the "bottom cup" by using the negative pressure generated by the nozzle spraying gas, which easily causes uneven distribution of the primary air flow, affecting the primary air coefficient to a certain extent, so that the gas pressures flowing out of the fire holes circumferentially arranged on the outer ring burner cap or the inner ring burner cap are uneven, resulting in uneven flames of the outer ring fire generated by the outer ring burner cap or the inner ring fire generated by the inner ring burner cap. At the same time, the second ejector pipe and the first ejector pipe of this type of burner are both integrally provided with the "bottom cup" or are separately provided from the bottom cup. Whether it is the problem of poor ejector effect caused by being integrally provided with the "bottom cup" or the potential safety hazard of air leakage caused by the joint generated by being separately provided from the bottom cup, further improvement of the existing up-draft burner is required. In addition, there is a type of Chinese invention patent application disclosure, such as "A Burner for an Embedded Household Gas Cooker with Multiple Nozzles, Large Flow Rate and Fully Up-Draft" with the application number 200810220263.8 (the publication number is CN101446415A). This invention separately arranges the inner and outer nozzles corresponding to the inner and outer ejectors on both sides within the diameter range where the burner is located, which can effectively improve the limitation of the short ejector pipe length. At the same time, it can also realize independent adjustment of the inner and outer fires, and has a relatively large combustion power. The pursuit of high-power up-draft burners has become the mainstream trend. However, since the inner and outer ejectors are still arranged in the "bottom cup", the overall height of the burner is still relatively high, and the overall aesthetics is poor. Summary of the Invention

[0003] The first technical problem to be solved by the present invention is to provide an upward air inlet burner that can improve the mixing of primary air / gas more evenly in view of the above-mentioned current situation of the prior art.

[0004] The second technical problem to be solved by the present invention is to provide an upward air inlet burner that can effectively reduce the overall height of the burner while avoiding the nozzle being blocked by overflowing liquid in view of the above-mentioned current situation of the prior art.

[0005] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is as follows: The upward air inlet burner is characterized by comprising

[0006] a mounting base;

[0007] a second gas mixing chamber, which is arranged on the periphery of the mounting base. The second gas mixing chamber includes an inner wall surface and an outer wall surface that are concentrically and spaced apart, and a bottom wall connecting the inner wall surface and the outer wall surface. A second fire cover is covered above the inner wall surface and the outer wall surface. The inner wall surface, the outer wall surface, the bottom wall, and the second fire cover jointly enclose the second gas mixing chamber;

[0008] a second ejector pipe, which is arranged on the mounting base, and the air outlet of the second ejector pipe is communicated with the second gas mixing chamber;

[0009] a second injector, which is arranged on the mounting base and is communicated with the air inlet of the second ejector pipe; and

[0010] a flow equalizing plate, which is arranged on the outer wall surface of the second gas mixing chamber and is higher than the air outlet of the second ejector pipe, and is used for equalizing the gas flowing out of the second ejector pipe. The flow equalizing plate has a narrow part adjacent to the air outlet of the second ejector pipe.

[0011] Furthermore, the flow equalizing plate further includes a wide part that continues to flow along the gas flow direction from the narrow part. The width ratio of the narrow part to the wide part is 2:3. There is a flow equalizing plate in the second gas mixing chamber. The height of the flow equalizing plate is higher than the outlet of the second ejector pipe. When the air flow enters the second gas mixing chamber, due to the turning effect of the tangential corner, part of the air flow will turn while part of the air flow will flow upward. However, at the outlet of the second ejector pipe, due to the large tangential momentum, the upward air flow rate is small. Therefore, a 4-mm narrow part is adopted here to guide the air flow while ensuring the air flow uniformity and diffusing it in the circumferential direction. After a 25° turn, the speed gradually decreases, and the air flow is mainly pressure-based. The upward flow trend of the air flow gradually becomes obvious. At this time, a 6-mm wide part can ensure that the air flow flows evenly upward within a range of 100°, while ensuring the circumferential flow of the air flow.

[0012] Further, an included angle α is formed between the connecting lines of the narrow part and the wide part with the center of the second mixing chamber, and 100° ≤ α ≤ 150°. As analyzed above, in order to ensure the uniform upward flow of the air flow within a range of 100°, and at the same time ensure the circumferential flow of the air flow, an included angle α is formed between the connecting lines of the narrow part and the wide part with the center of the second mixing chamber, and 100° ≤ α ≤ 150°.

[0013] Further, the narrow part of the second ejector tube adjacent to the uniform flow plate locally protrudes from the upper surface of the bottom wall, and the protruding part accounts for 1 / 3 of the outer perimeter of the second mixing chamber. After the 125° rotation of the uniform flow plate, the air flow can basically be evenly distributed in the remaining cavity, and the distribution of the air flow can be controlled by the protruding part of the second ejector tube. In the first 125° of the entire second mixing chamber, the uniform flow plate can just control the uniform distribution of the air flow, and the remaining part is controlled by the protruding part of the second ejector tube to control the uniform distribution of the air flow.

[0014] Further, the interval part between the part of the second mixing chamber corresponding to the narrow part of the second ejector tube adjacent to the uniform flow plate protruding from the upper surface of the bottom wall and the uniform flow plate is higher than the bottom wall, and the higher part also accounts for 1 / 3 of the outer perimeter of the second mixing chamber. After passing through the uniform flow plate and rotating 125°, the air flow can basically be evenly distributed in the remaining cavity, and 1 / 3 of the part can make the air flow evenly distributed through the higher part. In the first 125° of the entire second mixing chamber, the uniform flow plate can just control the uniform distribution of the air flow, and the remaining part is controlled by the higher part and the protruding part of the second ejector to control the uniform distribution of the air flow.

[0015] To solve the second technical problem, preferably, the mounting seat is further provided with:

[0016] Base;

[0017] The first burner cap, covering the base to form a first mixing chamber in the center;

[0018] The first ejector tube, the air outlet of the first ejector tube is communicated with the first mixing chamber, and the air outlet of the first ejector tube is communicated with the first mixing chamber; and

[0019] The first injector, communicated with the air inlet of the first ejector tube.

[0020] The base eliminates the conventional bottom cup located below the panel. Instead, the first injector and the second injector are directly installed through the base, so that the first injector and the second injector can directly supplement air through the air passage above the mounting base. While the supplement is convenient, it can also ensure sufficient air intake to promote the full combustion of the burner. In addition, while eliminating the conventional bottom cup located below the mounting base, the second ejector pipe is ingeniously partially placed inside the second mixing chamber. On the one hand, it can reduce the overall height of the burner, and on the other hand, it can avoid the potential safety hazards caused by air leakage if the second ejector pipe is connected by seams. And the present invention adopts the method of multiple nozzles and multiple ejector pipes, which overcomes the limitation that the ejector pipe is limited within the diameter range where the burner is located, resulting in a still relatively short size of the ejector pipe, ensures the primary air ejection ability of the burner, and realizes high firepower.

[0021] Further, the base is C-shaped, and the base includes a C-shaped outer wall and a C-shaped inner wall connecting the ends of the C-shaped outer wall. And the C-shaped inner wall encloses a cavity for accommodating the ignition needle and / or the thermocouple, and at least one through hole is opened at the position corresponding to the ignition needle and / or the thermocouple on the first burner cap. Hiding the ignition needle and / or the thermocouple in the C-shaped cavity of the base can improve the use environment of the ignition needle and / or the thermocouple. On the one hand, it can prevent liquid overflow from entering the through hole, and on the other hand, it can make the ignition needle and the thermocouple not affected by the surrounding wind, effectively protect the thermocouple and the ignition needle, thereby improving the ignition success rate of the ignition needle and / or the fire retention rate of the thermocouple, and at the same time, it can also extend the service life of the ignition needle and / or the thermocouple.

[0022] Further, the first burner cap includes a C-shaped outer ring wall and a C-shaped connecting wall connecting the end points of the C-shaped outer ring wall, and the through hole is opened on the C-shaped connecting wall.

[0023] In order to improve the ignition success rate, preferably, auxiliary ignition holes are respectively provided at both ends of the C-shaped connecting wall. And the auxiliary ignition holes are arranged at the position where the gas outlet of the overall first mixing chamber is the slowest, which can reduce the gas outlet speed of the auxiliary ignition holes, thereby effectively improving the ignition success rate.

[0024] In order to prevent the liquid overflow from affecting the ignition needle and / or the thermocouple, preferably, the top wall of the first burner cap has a waterproof eaves extending outward in the radial direction of the first burner cap corresponding to the cavity.

[0025] In order to further slow down the gas outlet speed in the concave cavity, preferably, the waterproof eaves is U-shaped, including a horizontal part and two vertical parts. The horizontal part gradually inclines outward from top to bottom, and the lower surface of the horizontal part has at least two grooves for slowing down the gas outlet.

[0026] Similarly, in order to prevent the overflow liquid from affecting the ignition needle and / or the thermocouple, preferably, the surface of the top wall of the first burner cap is at least partially recessed downward to form a liquid storage groove for caching the overflow liquid, and the top wall of the first burner cap has an overflow liquid outlet communicating with the liquid storage groove. The liquid storage groove can also, to a certain extent, slow down the impact of the overflow liquid on the flame outlet holes of the first burner cap.

[0027] Compared with the prior art, the advantages of the present invention are that the second mixing chamber is provided with a flow equalizing plate, the height of the flow equalizing plate is higher than the air outlet of the second ejector tube. When the gas flow ejected from the second ejector tube enters the second mixing chamber, due to the turning effect of the tangential corner, part of the gas flow will turn while part of the gas flow will flow upward. However, at the air outlet of the second ejector tube, due to the large tangential momentum, the upward gas flow rate is small. Therefore, a narrow part is adopted here to guide the gas flow while ensuring the uniformity of the gas flow, and the gas flow is diffused in the circumferential direction. In this way, the primary air and gas in the second mixing chamber can be more fully mixed, avoiding the mutual impact caused by the convergence of the gas and the primary air from different directions, further improving the uniformity of the mixing of the primary air and the gas and the primary air suction rate, effectively reducing the kinetic energy loss at the same time, making its diffusion uniform, so as to maintain a stable and uniform flame in the flame outlet area supplied by the second mixing chamber to the second burner cap, so that the flame of the up-draft burner is short, uniform and powerful, without defects such as yellow flame and flashback. Finally, the second mixing chamber and the second burner cap of the present invention are both structures that are easy to disassemble and install, which is convenient for users to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the up-draft burner in the embodiment of the present invention;

[0029] Figure 2 is Figure 1 a schematic structural diagram with the first burner cap and the second burner cap omitted;

[0030] Figure 3 is Figure 2 a schematic structural diagram at an angle;

[0031] Figure 4 is Figure 2 a schematic structural diagram at another angle;

[0032] Figure 5 is a schematic structural diagram of the up-draft burner in the embodiment of the present invention from another angle;

[0033] Figure 6 is a schematic structural diagram of the second burner cap in the embodiment of the present invention;

[0034] Figure 7 is a schematic structural diagram of the second burner cap from another angle in the embodiment of the present invention;

[0035] Figure 8 This is a cross-sectional view of the second burner cap in the embodiments of the present invention. Detailed implementation manners

[0036] The present invention will be further described in detail below in conjunction with the embodiments with reference to the accompanying drawings.

[0037] As Figures 1 to 8 shown, this is the best embodiment of this embodiment. The up-draft burner of this embodiment includes a mounting base 1; a second mixing chamber 2 arranged on the periphery of the mounting base 1, the second mixing chamber 2 includes an inner wall surface 21 and an outer wall surface 22 which are concentrically and spaced apart, and a bottom wall 23 connecting the inner wall surface 21 and the outer wall surface 22. A second burner cap 3 is covered above the inner wall surface 21 and the outer wall surface 22. The inner wall surface 21, the outer wall surface 22, the bottom wall 23 and the second burner cap 3 together enclose the second mixing chamber 2; a second ejector tube 4 arranged on the mounting base 1, and an air outlet 41 of the second ejector tube 4 is communicated with the second mixing chamber 2; and a second injector 5 which is also arranged on the mounting base 1 and communicated with an air inlet 42 of the second ejector tube 4, and a flow equalizing plate 6 arranged on the outer wall surface 22 of the second mixing chamber 2 and higher than the air outlet 41 of the second ejector tube 4. The flow equalizing plate 6 is used to equalize the flow of the gas flowing out of the second ejector tube 4, and the flow equalizing plate 6 has a narrow part 61 adjacent to the air outlet 41 of the second ejector tube 4. There is a flow equalizing plate 6 in the second mixing chamber 2, and the height of the flow equalizing plate 6 is higher than the air outlet 41 of the second ejector tube 4. When the gas flow ejected by the second ejector tube 4 enters the second mixing chamber, due to the turning effect of the tangential corner, part of the gas flow will turn while part of the gas flow will flow upward. However, at the air outlet 41 of the second ejector tube 4, due to the large tangential momentum, the upward gas flow rate is small. Therefore, a narrow part 61 is adopted here to guide the gas flow while ensuring the uniformity of the gas flow and diffusing it in the circumferential direction. In this way, the primary air and gas in the second mixing chamber 2 can be mixed more sufficiently, avoiding the collision between the gas and the primary air due to the convergence from different directions, further improving the uniformity of the mixing of the primary air and the gas and the primary air suction rate, and at the same time effectively reducing the kinetic energy loss, making its diffusion uniform, so as to keep the flame in the fire outlet area supplied by the second mixing chamber 2 to the second burner cap 3 stable and uniform, so that the flame of the up-draft burner is short, uniform and powerful, without defects such as yellow flame and flashback. Finally, the second mixing chamber 2 and the second burner cap 3 of the present invention are both structures that are easy to disassemble and install, which is convenient for users to clean.

[0038] Specifically, the flow equalizing plate 6 further includes a wide portion 62 that continues to flow along the combustion flow direction from the narrow portion 61. The width ratio of the narrow portion 61 to the wide portion 62 is 2:3. The flow equalizing plate 6 is provided in the second mixing chamber 2, and the height of the flow equalizing plate 6 is higher than the outlet of the second injection pipe 4. When the air flow enters the second mixing chamber 2, due to the turning effect of the tangential corner, part of the air flow will turn while part of the air flow will flow upward. However, at the outlet of the second injection pipe 4, due to the large tangential momentum, the upward air flow rate is small. Therefore, a narrow portion 61 with a width of 4 mm is used here to guide the air flow while ensuring the air flow uniformity and diffusing it in the circumferential direction. After a 25° turn, the speed gradually decreases, and the air flow is mainly pressure-based. The upward flow trend of the air flow becomes gradually obvious. At this time, a wide portion 62 with a width of 6 mm can ensure that the air flow flows uniformly upward within a range of 100°, while ensuring the circumferential flow of the air flow.

[0039] Moreover, an included angle α is formed between the connecting lines of the narrow portion 61 and the wide portion 62 and the center of the second mixing chamber 2, and 100° ≤ α ≤ 150°. As analyzed above, in order to ensure that the air flow flows uniformly upward within a range of 100° and ensure the circumferential flow of the air flow, an included angle α is formed between the connecting lines of the narrow portion 61 and the wide portion 62 and the center of the second mixing chamber 2, and 100° ≤ α ≤ 150°.

[0040] The local part of the second injection pipe 4 adjacent to the narrow portion 61 of the flow equalizing plate 6 protrudes from the upper surface of the bottom wall 23, and the protruding part 43 accounts for 1 / 3 of the outer perimeter of the second mixing chamber 2. After a 125° rotation of the flow equalizing plate 61, the air flow can basically be evenly distributed in the remaining cavity 74, and the distribution of the air flow can be controlled by the protruding part of the second injection pipe 4. In the first 125° of the entire second mixing chamber 2, the flow equalizing plate 6 can just control the uniform distribution of the air flow, and the remaining part is controlled by the protruding part 43 of the second injection pipe 4 to control the uniform distribution of the air flow. The interval part 20 between the part of the second mixing chamber 2 corresponding to the local part of the second injection pipe 4 adjacent to the narrow portion 61 of the flow equalizing plate 6 protruding from the upper surface of the bottom wall 23 and the flow equalizing plate 6 is higher than the bottom wall 23, and the higher part also accounts for 1 / 3 of the outer perimeter of the second mixing chamber 2. After passing through the flow equalizing plate 6 and a 125° rotation, the air flow can basically be evenly distributed in the remaining cavity 74, and the air flow can be evenly distributed through the higher part in the 1 / 3 part. In the first 125° of the entire second mixing chamber 2, the flow equalizing plate 6 can just control the uniform distribution of the air flow, and the remaining part is controlled by the higher part and the protruding part of the second injector to control the uniform distribution of the air flow.

[0041] In this embodiment, in order to effectively reduce the overall height of the burner while avoiding the nozzle being blocked by overflow liquid, a base 7 is further provided on the mounting base 1; a first burner cap 8 that covers the base 7 to form a first mixing chamber 80 in the center, and a first ejector tube 9, the air outlet 41 of the first ejector tube 9 is communicated with the first mixing chamber 80, the air outlet 41 of the first ejector tube 9 is communicated with the first mixing chamber 80, and a first injector 10, the first injector 10 is communicated with the air inlet 42 of the first ejector tube 9. Among them, the conventional bottom cup located under the panel is cancelled by using the base 7, but the first injector 10 and the second injector 5 are directly installed through the base 7. Thus, the first injector 10 and the second injector 5 can directly supplement air through the air passage above the mounting base 1. While the supplement is convenient, it can also ensure sufficient air intake to promote the full combustion of the burner. In addition, while cancelling the conventional bottom cup located under the mounting base 1, the second ejector tube 4 is also cleverly partially placed inside the second mixing chamber 2. On the one hand, it can reduce the overall height of the burner, and on the other hand, it can avoid the safety hazards caused by air leakage when the second ejector tube 4 is connected by seams. And the present invention adopts the method of multiple nozzles and multiple ejector tubes, overcoming the limitation that the ejector tube is limited within the diameter range where the burner is located, resulting in the still relatively short size of the ejector tube, ensuring the primary air ejecting ability of the burner and achieving high firepower. The base 7 of this embodiment is C-shaped, the base 7 includes a C-shaped outer wall 71 and a C-shaped inner wall 73 connecting the end 72 of the C-shaped outer wall 71, and the C-shaped inner wall 73 encloses a cavity 74 for accommodating the ignition needle 30 and / or the thermocouple. And at least one through hole 81 is opened on the first burner cap 8 at the position corresponding to the ignition needle 30 and / or the thermocouple, hiding the ignition needle 30 and / or the thermocouple in the C-shaped cavity 74 of the base 7 to improve the use environment of the ignition needle 30 and / or the thermocouple. On the one hand, it can prevent overflow liquid from entering the through hole 81, and on the other hand, it can make the ignition needle 30 and the thermocouple not affected by the surrounding wind force, effectively protecting the thermocouple and the ignition needle 30, thereby improving the ignition success rate of the ignition needle 30 and / or the fire retention rate of the thermocouple, and at the same time, it can also extend the service life of the ignition needle 30 and / or the thermocouple. The first burner cap 8 includes a C-shaped outer ring wall 82 and a C-shaped connecting wall 83 connecting the end points 800 of the C-shaped outer ring wall 82, and the through hole 81 is opened on the C-shaped connecting wall 83. In order to improve the ignition success rate, preferably, auxiliary ignition holes 831 are respectively provided at both ends 72 of the C-shaped connecting wall 83, and the auxiliary ignition holes 831 are arranged at the position where the gas outlet of the overall first mixing chamber 80 is the slowest, which can reduce the gas outlet speed of the auxiliary ignition holes 831, thereby effectively improving the ignition success rate.Moreover, to prevent the overflow liquid from affecting the ignition needle 30 and / or the thermocouple 40, the top wall 84 of the first burner cap 8 has a waterproof eaves 85 extending outward in the radial direction of the first burner cap 8 corresponding to the position of the cavity 74. Preferably, the waterproof eaves 85 is U-shaped, including a horizontal portion 851 and two vertical portions 852. The horizontal portion 851 gradually slopes outward from top to bottom, and the lower surface of the horizontal portion 851 has at least two grooves 8511 for slowing down the gas outlet, so as to further slow down the gas outlet speed in the concave cavity. Similarly, to prevent the overflow liquid from affecting the ignition needle 30 and / or the thermocouple 40, at least part of the surface of the top wall 84 of the first burner cap 8 is recessed downward to form a liquid storage groove 841 for caching the overflow liquid, and the top wall 84 of the first burner cap 8 has an overflow liquid outlet 842 communicating with the liquid storage groove 841. The liquid storage groove 841 can also, to a certain extent, slow down the impact of the overflow liquid on the fire holes of the first burner cap 8.

[0042] Finally, this embodiment also provides a cooker applying the above upward air inlet burner, including a panel, on which a liquid receiving tray is arranged. The liquid receiving tray serves as the base 7. During cleaning, only the base 7 needs to be removed, leaving the liquid receiving tray, which has the characteristic of being convenient for cleaning. To reduce the heat conduction in contact with the liquid receiving tray and improve the thermal efficiency, the second mixing chamber 2 uses a support connection method with support columns. As described above, the paths of the primary air, gas, and the mixed primary air and gas inside the burner are as follows. Due to the first injector 10 that sucks the primary air from the outside by the kinetic energy of the gas itself, the primary air and gas are premixed and enter the first mixing chamber 80 respectively. The mixed primary air and gas finally pass through the fire holes of the first burner cap 8 and are ignited together with the secondary air in the external environment to form an inner ring fire. It also includes a second burner cap 3 for the peripheral fire that can be independently controlled by the user. The primary air and gas required for the peripheral fire are independently input into the second mixing chamber 2 by the second injector tube 4 independent of the first injector tube 9. At the same time, the second mixing chamber 2 is separated from the first mixing chamber 80, and in this way, the fluid separation of the second mixing chamber 2 and the first mixing chamber 80 is achieved, and then they can be supplied separately to allow the user to independently control the inflow of the fuel mixture into the first injector tube 9 and the second injector tube 4. If the sizes of the peripheral fire and the center fire need to be adjusted, the regulating valve of the main air inlet pipe connected to the first air inlet pipe connected to the first injector 10 and the second air inlet pipe communicating with the second injector 5 can be adjusted.

Claims

1. An upward air inlet burner, characterized in that: it includes a mounting base (1); a second gas mixing chamber (2), arranged on the periphery of the mounting base (1), the second gas mixing chamber (2) includes an inner wall surface (21) and an outer wall surface (22) arranged concentrically and spaced apart, and a bottom wall (23) connecting the inner wall surface (21) and the outer wall surface (22), a second burner cap (3) covers above the inner wall surface (21) and the outer wall surface (22), and the inner wall surface (21), the outer wall surface (22), the bottom wall (23) and the second burner cap (3) jointly enclose the second gas mixing chamber (2); a second ejector tube (4), arranged on the mounting base (1), an air outlet (41) of the second ejector tube (4) is communicated with the second gas mixing chamber (2); a second injector (5), arranged on the mounting base (1), and communicated with an air inlet (42) of the second ejector tube (4); and a flow equalizing plate (6), arranged on the outer wall surface (22) of the second gas mixing chamber (2) and higher than the air outlet (41) of the second ejector tube (4), for equalizing the flow of the gas flowing out of the second ejector tube (4), the flow equalizing plate (6) has a narrow part (61) adjacent to the air outlet (41) of the second ejector tube (4); the flow equalizing plate (6) further includes a wide part (62) continuing to flow along the gas flow direction from the narrow part (61), and the width ratio of the narrow part (61) to the wide part (62) is 2:3; the narrow part (61) and the wide part (62) form an included angle α with the connection line of the center of the second gas mixing chamber (2), and 100° ≤ α ≤ 150°; the second ejector tube (4) locally protrudes from the upper surface of the bottom wall (23) adjacent to the narrow part (61) of the flow equalizing plate (6), and the protruding part (43) accounts for 1 / 3 of the outer perimeter of the second gas mixing chamber (2).

2. The upward air inlet burner according to claim 1, characterized in that: a spacing part (20) between a part of the second gas mixing chamber (2) corresponding to the part where the second ejector tube (4) locally protrudes from the upper surface of the bottom wall (23) adjacent to the narrow part (61) of the flow equalizing plate (6) and the flow equalizing plate (6) is higher than the bottom wall (23), and the higher part also accounts for 1 / 3 of the outer perimeter of the second gas mixing chamber (2).

3. The upward air inlet burner according to any one of claims 1 to 2, characterized in that: the following are further arranged on the mounting base (1): a base (7); a first burner cap (8), covering the base (7) to form a first gas mixing chamber (80) at the center; a first ejector tube (9), an air outlet (41) of the first ejector tube (9) is communicated with the first gas mixing chamber (80), and the air outlet (41) of the first ejector tube (9) is communicated with the first gas mixing chamber (80); and a first injector (10), communicated with an air inlet (42) of the first ejector tube (9).

4. The upward air inlet burner according to claim 3, characterized in that: The base (7) is C-shaped and includes a C-shaped outer wall (71) and a C-shaped inner wall (73) connecting the ends (72) of the C-shaped outer wall (71). The C-shaped inner wall (73) encloses a cavity (74) for accommodating the ignition pin (30) and / or the thermocouple. At least one through hole (81) is formed at a position corresponding to the ignition pin (30) and / or the thermocouple (40) on the first burner cap (8).

5. The up-draft burner according to claim 4, characterized in that: The first burner cap (8) includes a C-shaped outer ring wall (82) and a C-shaped connecting wall (83) connecting the end points (800) of the C-shaped outer ring wall (82), and the through hole (81) is formed on the C-shaped connecting wall (83).

6. The up-draft burner according to claim 5, characterized in that: Auxiliary ignition holes (831) are respectively provided at both ends (72) of the C-shaped connecting wall (83).

7. The up-draft burner according to claim 6, characterized in that: The top wall (84) of the first burner cap (8) has a waterproof eaves (85) extending radially outward of the first burner cap (8) at a position corresponding to the cavity (74).

8. The up-draft burner according to claim 7, characterized in that: The waterproof eaves (85) is U-shaped and includes a horizontal portion (851) and two vertical portions (852). The horizontal portion (851) is gradually inclined outward from top to bottom, and at least two grooves (8511) for slowing down the gas outlet are provided on the lower surface of the horizontal portion (851).

9. The up-draft burner according to claim 8, characterized in that: The surface of the top wall (84) of the first burner cap (8) is at least partially recessed downward to form a liquid storage tank (841) for buffering the overflow liquid, and the top wall (84) of the first burner cap (8) has an overflow liquid outlet (842) communicating with the liquid storage tank (841).

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