An upper air inlet burner and a stove using the upper air inlet burner

Abstract

The present invention relates to an upper air inlet burner, characterized in that it includes a base, the base includes an upper base and a lower base that are relatively combined, and is arranged on the central position of the upper base, and a first fire cover with a first mixing chamber located in the center is formed between the upper base, and a first ejector pipe, the part where the air outlet is located penetrates into the base and is located between the upper base and the lower base, and the gap between the outer peripheral wall of this part and the upper base forms a buffer cavity. Compared with the prior art, the advantage of the present invention is that the part where the air outlet of the first ejector pipe is located penetrates into the base and is located between the upper base and the lower base. Since the first ejector pipe is partially surrounded by the base, it can be made longer in terms of processing, the air intake resistance is larger, and the volume requirement for the buffer cavity is larger. For this reason, the upper base and the lower base are formed separately, so that the cross-sectional area of ​​the buffer cavity can be gradually increased in processing.

Description

Technical Field

[0001] The invention relates to a burner of a gas cooker, in particular to an upward air intake type cooker burner with multiple nozzles. Background Art

[0002] At present, many gas stoves have begun to use completely upper air intake burners. Since the primary and secondary air required by the completely upper air intake burners during combustion are all from the upper part of the stove panel, the chassis of the gas stove can be fully sealed. Compared with the traditional burners with lower air intake structure, the completely upper air intake burners are not only safer to use, but also can well solve the problem of stove flameout caused by opening and closing the cabinet door. However, the traditional completely upper air intake burners are all supplemented with primary air through the gap between the mixing chamber and the base. The problem caused 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 the appearance of the burner not being beautiful enough. In addition, after the gap is set between the base and the mixing chamber, the overflow will flow into the base and the circular basin-shaped body located below the panel, namely the term "bottom cup", through the gap, which is inconvenient for the user to maintain and clean. Moreover, if the overflow 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 ejection pipe outlet and the mixed gas channel, which significantly increases the ejection resistance. This type of design, such as the Chinese utility model patent "Gas Burner" with patent number ZL201120156854.0 (authorization announcement number CN202082922U), has a poor ejection effect. At the same time, the primary air added from the panel of this type of upper air intake burner enters the "bottom cup" by utilizing the negative pressure generated by the nozzle spraying gas, which can easily cause uneven airflow distribution of the primary air, affecting the primary air flow to a certain extent. The gas coefficient makes the gas pressure flowing out of the fire holes arranged along the circumferential direction of the outer ring fire cover or the inner ring fire cover uneven, resulting in uneven flames of the outer circle fire generated by the outer ring fire cover or the inner circle fire generated by the inner ring fire cover. At the same time, the second ejector tube and the first ejector tube of this type of burner are both integrated with the "bottom cup" or separately arranged with the bottom cup. Regardless of the problem of poor ejection effect caused by the integrated arrangement with the "bottom cup" or the safety hazard caused by air leakage caused by the joints caused by the separate arrangement with the bottom cup, further improvements are needed to the existing upward air inlet burners. In addition, there is a type of Chinese invention patent application with application number 200810220263.8, which discloses "A multi-nozzle, large flow, fully upper air intake embedded household gas stove burner" (publication number CN101446415A). This invention arranges the inner and outer nozzles corresponding to the inner and outer ring ejectors on both sides of the diameter range of the burner, which can effectively improve the limitation of the short length of the ejector tube, and at the same time can realize independent adjustment of the inner and outer fires, with a large combustion power. The pursuit of high-power upper air intake burners has become a mainstream trend, but because the inner and outer ring ejectors are still arranged in the "bottom cup", the overall height of the burner is still 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 capable of improving the uniform mixing of the primary air / gas mixture in the inner ring in view of the above-mentioned prior art status.

[0004] The second technical problem to be solved by the present invention is to provide an upper air inlet burner capable of improving the thermal efficiency of inner ring combustion in response to the above-mentioned existing technical status.

[0005] The third technical problem to be solved by the present invention is to provide an upward air inlet burner which can achieve high firepower and effectively reduce the overall height of the burner in response to the above-mentioned existing technical status.

[0006] The fourth technical problem to be solved by the present invention is to provide an upper air inlet burner with sufficient air supplement and complete combustion in response to the above-mentioned existing technical status.

[0007] The fifth technical problem to be solved by the present invention is to provide an upper air inlet burner which is convenient for users to clean in view of the above-mentioned existing technical status.

[0008] The sixth technical problem to be solved by the present invention is to provide a stove using the above-mentioned upper air inlet burner in view of the above-mentioned existing technical status.

[0009] The technical solution adopted by the present invention to solve the above technical problems is: the upper air inlet burner is characterized by: comprising:

[0010] The base comprises an upper seat body and a lower seat body which are relatively combined;

[0011] A first fire cover is arranged on the central position of the upper seat body, and a first gas mixing chamber located in the center is formed between the first fire cover and the upper seat body;

[0012] The first ejector tube, the part where the air outlet is located penetrates the base and is located between the upper seat body and the lower seat body, the gap between the outer wall of this part and the upper seat body forms a buffer cavity, and the air outlet of the first ejector tube is fluidically connected with the first mixing chamber through the buffer cavity, and the part where the air inlet of the first ejector tube is located is located outside the base and is adapted to be equipped with a first ejector.

[0013] The first ejector tube and the lower seat body are an integral part, and the lower seat body at a position corresponding to the first ejector tube insertion position is a part of the first ejector tube gas outlet position. Since the lower seat body constitutes a part of the first ejector tube gas outlet position, the first ejector tube gas outlet position position is more likely to achieve an increase in cross-sectional area during processing, and the increase in the gas outlet cross-sectional area of ​​the first ejector tube enables the gas and primary air to be mixed more evenly when flowing out through the first ejector tube gas outlet.

[0014] In order to allow the user to separately control the central fire and peripheral fire formed by the burner, there is also a second air mixing chamber installed on the upper seat body and located outside the first air mixing chamber and independent of each other. The second air mixing chamber includes an inner circle wall and an outer circle wall concentrically spaced and a bottom wall connecting the inner circle wall and the outer circle wall. The inner circle wall and the outer circle wall are covered with a second fire cover. The inner circle wall, the outer circle wall, the bottom wall and the second fire cover together enclose the second air mixing chamber. The upper seat body and the wall of the first ejector pipe are directly connected to the inner circle wall at the rest of the outer portion of the upper seat body.

[0015] From the perspective of convenient processing, the upper seat body partially extends toward the bottom wall, the first ejector tube penetration portion includes an inverted U-shaped upper tube wall, and the lower seat body includes a first plate body, the surface of the first plate body partially convexly upwardly provides a lower tube wall that can be matched with the upper tube wall, and correspondingly, the first plate body extends toward the bottom wall outside the lower tube wall and is connected with the upper seat body to form a closed section. At the same time, both the upper seat body and the lower seat body extend toward the bottom wall of the second gas mixing chamber, which can expand the buffer space of the buffer cavity as much as possible in the radial direction of the burner, and reduce the axial height of the burner on the premise of increasing the mixed gas and primary air.

[0016] Preferably, in the direction of airflow, from the air inlet to the air outlet, the cross-sectional areas of the upper tube wall and the lower tube wall gradually increase. Since the lower seat body and the lower tube wall are integrally formed, the cross-sectional areas of the upper tube wall and the lower tube wall can be gradually increased in processing, and the gradual increase in the cross-sectional areas of the two allows the fuel gas and the primary air to be mixed more evenly when flowing out through the air outlet end of the first ejector tube.

[0017] In order to provide sufficient secondary air to the first fire cover, the inner wall forms an annular cavity, and the wall of the first ejector tube and the upper seat and the annular cavity form a secondary air channel connecting the outside world and the fire outlet area of ​​the first fire cover.

[0018] Furthermore, the first injector is arranged on a nozzle seat located below the second air mixing chamber, the first injector is arranged at a central position of the nozzle seat and extends out from a mounting seat located above the nozzle seat, and also includes a second injector which is also arranged on the nozzle seat and spaced apart from the first injector, and a second injector tube which is independent of the first injector tube and arranged in the second air mixing chamber, the air inlet end of the second injector tube is opposite to the second injector, and the air outlet end is communicated with the second air mixing chamber. The nozzle seat eliminates the conventional bottom cup under the panel, and instead directly mounts the first injector and the second injector through the nozzle seat, so that the first injector and the second injector can directly replenish air through the air channel above the mounting seat, which is convenient for replenishment and can ensure that the air replenishment amount is sufficient to promote full combustion of the burner; in addition, while eliminating the conventional bottom cup under the mounting seat, the second ejector pipe is cleverly placed in the second air mixing chamber, which can reduce the overall height of the burner on the one hand, and avoid the safety hazard caused by air leakage when the second ejector pipe is connected by a seam on the other hand; the present invention adopts a method of multiple nozzles and multiple ejector pipes, which overcomes the limitation that the ejector pipe is limited to the diameter range of the burner, resulting in the ejector pipe size being still short, thereby ensuring the burner's one-time air ejection capability and achieving high firepower.

[0019] In order to prevent the overall height of the burner from being too high and to supplement primary air on the mounting seat with a sufficient amount of primary air, a primary air channel is also included. The primary air channel is formed on the outer ring wall surface corresponding to the nozzle seat at a position that is partially recessed inwardly along the radial direction of the mixing chamber; the inwardly recessed outer ring wall portion directly serves as a partition separating the primary air channel and the secondary air channel, and the partition portion is provided with an air inlet end of the second ejector tube and an air inlet of the first ejector tube.

[0020] Furthermore, the bottom wall of the second air mixing chamber is at least concave at other parts of the periphery of the primary air channel to form a support foot, and the gap formed between adjacent support feet is connected to the secondary air channel, and the secondary air channel is independent of the primary air channel. The primary air channel and the secondary air channel on the lower surface of the second air mixing chamber are independent of each other, and a part of the outer ring wall is cleverly used as a partition that separates each other and does not affect each other, without the need to add other partition components. The structure is simple and can ensure that the overall height of the burner is not too high, and the structure is compact.

[0021] In order to effectively reduce the overall height of the burner, the present invention cleverly arranges the second ejector tube in the second gas mixing chamber; a recess for accommodating the second ejector tube is formed in the support leg.

[0022] In order to further make the gas pressure in the second gas mixing chamber uniform, a pressure stabilizing member for stabilizing the pressure of the gas in the second gas mixing chamber is provided in the second gas mixing chamber, and the pressure stabilizing member can partially extend into the recess.

[0023] Further, in order to facilitate the placement of the pressure stabilizer, the pressure stabilizer includes a second plate body, the second plate body has a central hole in the center, the hole wall of the central hole protrudes upward to form a circle of convex walls that can surround the annular cavity, and the outer periphery of the second plate body extends in the horizontal direction and can partially cover the recess.

[0024] Preferably, the second ejector tube is formed by an upper tube body and a lower tube body of matching shapes, wherein the lower tube body is formed by a local depression at the bottom of the support leg, and the upper tube body is formed by a depression from bottom to top at the outer periphery of the second plate body.

[0025] In order to facilitate the placement of the second fire cover, the second fire cover includes an annular body, and the inner edge and outer edge of the annular top wall of the body respectively extend downward to form an inner ring wall connected with the inner ring wall surface and an outer ring wall connected with the outer ring wall surface, and a main fire hole is opened on the outer ring wall.

[0026] In order to prevent the flame from leaving the main fire hole, the air inlet end of the main fire hole is located at the bottom end of the outer ring wall, and the air outlet end of the main fire hole is located at the outer ring wall. The outer ring wall is circumferentially provided with a first groove below the air outlet end of the main fire hole, and a first flame stabilizing hole connected to the first groove is also provided at the bottom end of the outer ring wall.

[0027] Furthermore, the first groove gradually tilts upward from bottom to top and intersects with the main fire hole, thereby forming a "V"-shaped flame stabilizing channel, which not only has the effect of stabilizing the flame, but also can prevent overflowing liquid from flowing back.

[0028] In order to prevent the overflow from entering the nozzle seat, the outer ring wall extends outward to form a protective umbrella above the nozzle seat. This design brings the following benefits: 1. The outer ring wall can form a waterproof eaves above the nozzle seat to prevent the overflow from entering the first injector and the second injector on the nozzle seat; 2. The outer ring wall can be made of heat-insulating material to prevent the flame heat generated by the second fire hole and the second flame-stabilizing hole from interfering with the supplement of the primary air of the first injector and the second injector on the nozzle seat; 3. The outer ring wall can serve as a "partition plate" to separate the secondary air used to supplement the second fire hole and the second flame-stabilizing hole connected to the second air mixing chamber from the primary air supplemented to the first injector and the second injector on the nozzle seat.

[0029] In order to allow the overflow liquid to quickly flow out of the nozzle seat, the outer wall gradually extends downward from top to bottom in a radial direction outward of the second gas mixing chamber.

[0030] In order to facilitate the placement of the first fire cover and stabilize the flame of the inner fire hole, the first fire cover includes a top cover and an outer annular wall extending downward from the top cover, and the outer annular wall is provided with an inner fire hole connected to the first mixing chamber and a second flame stabilizing hole located above and / or below the inner fire hole.

[0031] In order to solve the last technical problem, the present invention provides a stove using the above-mentioned upper air inlet burner, comprising a panel, characterized in that the mounting seat is a part of the panel.

[0032] The stove using the above-mentioned upper air inlet burner may also include a liquid receiving pan located below the burner, wherein the feature is that the liquid receiving pan serves as the mounting seat.

[0033] Compared with the prior art, the advantage of the present invention is that the portion where the gas outlet of the first ejector tube is located penetrates the base and is located between the upper base body and the lower base body. Since the first ejector tube is partially surrounded by the base, it can be made longer in terms of processing, and the air intake resistance is larger, and the volume requirement for the buffer chamber is larger. For this reason, the upper base body and the lower base body are formed separately, so that the buffer chamber can be processed to achieve a gradual increase in its cross-sectional area, so that the gas and the primary air can be mixed more evenly when flowing out through the gas outlet of the first ejector tube. At the same time, the setting of the buffer chamber can make the primary air / gas mixture ejected from the gas outlet end of the first ejector tube have a buffer space, which effectively The length of the first ejector pipe is increased, and the primary air that has been evenly mixed in the buffer chamber is mixed with the fuel gas and the primary air and enters the first mixing chamber, so as to avoid the fuel gas and the primary air colliding with each other when they converge from different directions, further improving the uniformity of the mixing of the primary air and the fuel gas, and improving the primary air intake rate, while also effectively reducing the kinetic energy loss and making it diffuse evenly, so that the ignition area supplied by the first mixing chamber to the first fire cover can maintain a stable and even flame, so that the flame of the upper air inlet burner is short, even and powerful, and there will be no defects such as yellow flame and flashback. Finally, the first mixing chamber and the first fire cover of the present invention are both easy-to-disassemble and install structures, which are convenient for users to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of an upper air inlet burner placed on a panel in an embodiment of the present invention;

[0035] Figure 2 It is a structural schematic diagram of an upper air inlet burner at an angle in an embodiment of the present invention (without the panel);

[0036] Figure 3 This is a structural schematic diagram of the upper air inlet burner from another angle in an embodiment of the present invention (without the panel);

[0037] Figure 4 for Figure 2 A schematic diagram of the decomposed structure from one angle;

[0038] Figure 5 for Figure 2 A cross-sectional view at an angle;

[0039] Figure 6 for Figure 2 A cross-sectional view from another angle (omitting the nozzle seat);

[0040] Figure 7 This is a schematic diagram of the structure of the second gas mixing chamber in an embodiment of the present invention without omitting the pressure stabilizing component;

[0041] Figure 8 Schematic diagram of the structure of the bottom of the second gas mixing chamber in an embodiment of the present invention;

[0042] Fig. 9 A schematic structural diagram of a voltage stabilizer in an embodiment of the present invention;

[0043] Fig.10 Schematic diagram of the structure of the lower seat body in the embodiment of the present invention. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below with reference to the accompanying drawings.

[0045] like Figures 1 to 10The best embodiment of this embodiment is shown. The upper air inlet burner of the present embodiment includes a base 500, which includes an upper body 501 and a lower body 502 that are relatively combined, and is arranged on the central position of the upper body 501, and a first fire cover 3 is formed with the upper body 501 to form a first mixing chamber 1 located in the center, and a first ejector pipe 2, the portion where the air outlet 23 of the first ejector pipe 2 is located penetrates into the base 500 and is located between the upper body 501 and the lower body 502, and the gap between the outer peripheral wall of this portion and the upper body 501 forms a buffer chamber 4, and the air outlet 23 of the first ejector pipe 2 is fluidically connected with the first mixing chamber 1 through the buffer chamber 4, the portion where the air inlet 24 of the first ejector pipe 2 is located is located outside the base 500, and is adapted to be equipped with a first injector 5, the first ejector pipe 2 and the lower body 502 are an integral part, and the position of the lower body 502 corresponding to the penetration portion of the first ejector pipe 2 is a part of the portion where the air outlet 23 of the first ejector pipe 2 is located. Due to the separate molding of the insertion part of the first ejector tube 2 and the lower seat body 502, the cross-sectional area of ​​the air outlet 23 of the first ejector tube 2 can be gradually increased during processing, and the gradual increase in the cross-sectional areas of the two allows the gas and the primary air to be mixed more evenly when flowing out through the air outlet end of the first ejector tube 2. At the same time, a buffer chamber 4 is formed between the periphery of the part where the air outlet 23 of the first ejector tube 2 is located and the upper seat body 501. The buffer chamber 4 effectively increases the length of the first ejector tube 2. At the same time, the setting of the buffer chamber 4 can make the primary air / gas mixture ejected from the air outlet 23 of the first ejector tube 2 have a buffer space. The primary air evenly mixed in the buffer chamber 4 is mixed with the gas and the primary air and enters the first mixing chamber 1, avoiding the gas and the primary air from merging from different directions and colliding with each other, thereby further improving the uniformity of the mixing of the primary air and the gas. In order to allow the user to separately control the central fire and peripheral fire formed by the burner, a second mixing chamber 6 is also included, which is installed on the upper seat body 501 and is located outside the first mixing chamber 1 and is independent of each other. The second mixing chamber 6 includes an inner circle wall 61 and an outer circle wall 62 concentrically spaced, a bottom wall 63 connecting the inner circle wall 61 and the outer circle wall 62, and a second fire cover 7 covering the inner circle wall 61 and the outer circle wall 62. The upper seat body 501 and the remaining part of the tube wall of the first ejector tube 2 outside the upper seat body 501 are directly connected to the inner circle wall 61. The upper seat body 501 partially extends toward the bottom wall to form an inverted U-shaped upper tube wall 231, and the lower seat body 502 includes a first plate body 5021. The first plate body 5021 partially protrudes upward and is provided with a lower tube wall 5022 that can be matched with the upper tube wall 231. Correspondingly, the first plate body 5021 extends toward the bottom wall outside the lower tube wall 5022 and is connected to the upper seat body 501 to form a closed section 5011.At the same time, the upper seat body 501 and the lower seat body 502 both extend toward the bottom wall 63 of the second gas mixing chamber 6, which can expand the buffer space of the buffer cavity 4 as much as possible in the radial direction of the burner, and can also reduce the axial height of the burner under the premise of increasing the mixed gas and primary air. Preferably, in the airflow direction, from upstream to downstream, the cross-sectional areas of the upper tube wall 231 and the lower tube wall 5022 gradually increase. Due to the integral molding of the lower seat body 502 and the lower tube wall 5022, the cross-sectional area of ​​the lower tube wall 5022 can be gradually increased in processing, and the gradual increase in the cross-sectional areas of the two makes the gas and the primary air more evenly mixed when flowing out through the outlet 23 of the first ejector pipe 2. In order to provide sufficient secondary air to the first fire cover 3, the inner ring wall 61 is surrounded by an annular cavity 611, and the tube wall of the first ejector pipe 2 and the upper seat body 501 and the annular cavity 611 form a secondary air channel 10 connecting the outside world and the fire outlet area of ​​the first fire cover 3.

[0046] In addition, it also includes a nozzle seat 8 arranged below the second air mixing chamber 6, the first injector 5 is arranged at the central position of the nozzle seat 8 and extends above the mounting seat 20 above the nozzle seat 8, and also includes a second injector which is also arranged on the nozzle seat 8 and spaced apart from the first injector 5, and a second injector pipe which is independently arranged in the second air mixing chamber 6 from the first injector pipe 2, the air inlet 41 of the second injector pipe is opposite to the second injector, and the air outlet end 42 is connected to the second air mixing chamber 6. The nozzle seat 8 eliminates the conventional bottom cup located under the mounting seat 20. Instead, the first injector 5 and the second injector are directly installed through the nozzle seat 8, so that the first injector 5 and the second injector can directly replenish air through the air channel above the mounting seat 20, which is convenient for replenishment and can ensure that the air replenishment amount is sufficient to promote full combustion of the burner; in addition, while eliminating the conventional bottom cup located under the mounting seat 20, the second ejector pipe is cleverly placed in the second mixing chamber 6, which can reduce the overall height of the burner on the one hand, and avoid the safety hazard caused by leakage when the second ejector pipe is connected by a seam on the other hand; the present invention adopts a method of multiple injectors and multiple ejector pipes, which overcomes the limitation that the ejector pipe is limited to the diameter range of the burner, resulting in the ejector pipe size being still short, thereby ensuring the burner's one-time air ejection capability and achieving high firepower. In this embodiment, two second injectors are provided, namely the first second injector 30 and the second second injector 30', and are symmetrically arranged on both sides of the first injector 5. Two second ejector pipes are also provided correspondingly, namely the first second ejector pipe 40 and the second second ejector pipe 40'. In order to prevent the overall height of the burner from being too high and to supplement primary air on the mounting seat 20 in sufficient amount, a primary air channel 50 is also included. The primary air channel 50 is formed on the outer ring wall surface 62 at a location corresponding to the nozzle seat 8 and partially inwardly recessed along the radial direction of the mixing chamber; the inwardly recessed outer ring wall 32 surface portion directly serves as a partition 620 separating the primary air channel 50 and the secondary air channel 10, and no other partition components need to be added. The structure is simple and can ensure that the overall height of the burner is not too high, and the structure is compact. The partition 620 is provided with an air inlet end 41 of the second ejector pipe and an air inlet 24 of the first ejector pipe 2. In addition, the bottom wall 63 of the second mixing chamber 6 is at least recessed at other parts of the periphery of the primary air channel 50 to form a support foot 60. In order to avoid mutual interference between the primary air channel 50 and the secondary air channel 10, the present embodiment is preferably at a point on the opposite side of the nozzle seat 8. For this purpose, the gap formed between adjacent support feet 60 connects the secondary air channel 10 and the outside world. At the same time, in order to prevent mutual interference when replenishing the primary air and the secondary air, the secondary air channel 10 and the primary air channel 50 are independently arranged.

[0047] At the same time, since the support leg 60 formed at the concave part is hollow, not only the first recess 601 for accommodating the first and second ejector tubes 40 and the second recess 602 for accommodating the second and second ejector tubes 40' are formed, but also the entire height of the burner can be effectively reduced. In order to further make the pressure of the gas flowing out of the fire holes arranged along the circumference of the second fire cover 7 uniform, a pressure stabilizing member 9 for stabilizing the pressure of the gas in the second gas mixing chamber 6 is arranged in the second gas mixing chamber 6, and the pressure stabilizing member 9 can partially extend into the first recess 601 and the second recess 602. Specifically, each pressure stabilizing member 9 includes a second plate body 91, the center of the second plate body 91 has a central hole 911, the hole wall of the central hole 911 protrudes upward to form a circle of convex walls 9111 that can surround the annular cavity 611, and the outer periphery of the second plate body 91 extends in the horizontal direction and can partially cover the first recess 601 or the second recess 602. For the convenience of processing, the first second ejector tube 40 and the second second ejector tube 40' are formed by matching the upper tube body 43 and the lower tube body 44, wherein the lower tube body 44 is formed by the local depression at the bottom of the support leg 60, and the upper tube body 43 is formed by the depression from bottom to top on the outer peripheral edge of the plate body. The joint seams of the first second ejector tube 40 and the second second ejector tube 40' are both inside the second mixing chamber 6 of the burner, reducing the difficulty and requirements of the sealing process.

[0048] Finally, the second fire cover 7 of the present invention also has a particularity, including an annular body, the inner edge and the outer edge of the annular top wall 71 of the body respectively extend downward to form an inner ring wall 72 connected to the inner ring wall surface 61 and an outer ring wall 73 connected to the outer ring wall surface 62, and a main fire hole 731 is opened on the outer ring wall 73. In order to prevent the main fire hole 731 from leaving the flame, the air inlet end 7312 of the main fire hole 731 is located at the bottom end of the outer ring wall 73. The gas outlet end 7311 of the main fire hole 731 is located at the outer ring wall 73. The outer ring wall 73 is provided with a first groove 732 circumferentially below the gas outlet end 7311 of the main fire hole 731. A first flame stabilizing hole 733 connected to the first groove 732 is also provided at the bottom of the outer ring wall 73. The first groove 732 gradually tilts upward from bottom to top and intersects with the main fire hole 731 to form a "V"-shaped flame stabilizing channel, which not only has the effect of stabilizing the flame, but also can prevent the overflow liquid from flowing back. In order to prevent the overflow liquid from entering the nozzle seat 8, the outer ring wall 73 extends outward to form a protective umbrella covering the top of the nozzle seat 8. This design brings the following benefits: 1. The outer wall 73 can form a waterproof eaves above the nozzle seat 8 to prevent overflow from entering the first injector 5 and the second injector on the nozzle seat 8; 2. The outer wall 73 can be made of heat-insulating material to prevent the flame heat generated by the flames of the inner fire hole 321 and the second flame-stabilizing hole 322 from interfering with the replenishment of primary air to the first injector 5 and the second injector on the nozzle seat 8; 3. The outer wall 73 can serve as a "partition plate" to separate the secondary air used to replenish the inner fire hole 321 and the second flame-stabilizing hole 322 connected to the second air mixing chamber 6 and the primary air replenished to the first injector 5 and the second injector on the nozzle seat 8. In order to allow the overflow to flow quickly to the outside of the nozzle seat 8, the outer wall 73 extends radially outward from the second air mixing chamber 6 and gradually downward from top to bottom. In order to facilitate the placement of the first fire cover 3 and stabilize the flame of the inner fire hole 321, the first fire cover 3 includes a top cover 31 and an outer annular wall 32 extending downward from the top cover 31, and the outer annular wall 32 is provided with a second flame stabilizing hole 322 above the inner fire hole 321 connected to the first mixing chamber 1 and a third flame stabilizing hole 324 below the inner fire hole 321.

[0049] The present invention also provides a stove using the above-mentioned upper air inlet burner, in which the liquid collecting pan 200 is directly used as the mounting base 20. In order to reduce the heat conduction in contact with the panel 201 or the liquid collecting pan 200 and improve the thermal efficiency, the second mixing chamber 6 uses a support connection method of a support column 600. As described above, the paths of the primary air, the gas and the mixed primary air and gas inside the burner are as follows: the primary air is sucked from the outside into the first injector 5 of the nozzle seat 8 due to and by the kinetic energy of the gas itself, and the primary air and gas are premixed and enter the first mixing chamber 1 respectively. The mixed primary air and gas finally pass through the inner fire hole 321, the second flame stabilizing hole 322, and the third flame stabilizing hole 324 of the first fire cover 3 and are ignited together with the secondary air of the external environment to form an inner ring fire. It also includes a second fire cover 7 that enables the user to control the peripheral fire separately. The primary air and fuel gas required for the peripheral fire are input into the second mixing chamber 6 by the second ejector pipe independently of the first ejector pipe 2. At the same time, the second mixing chamber 6 is separated from the first mixing chamber 1, so that the fluid separation of the second mixing chamber 6 and the first mixing chamber 1 is achieved, and then they can be supplied separately to allow the user to separately control the inflow of the fuel mixture into the first ejector pipe 2 and the second ejector pipe. If the size of the peripheral fire and the central fire is to be adjusted, the regulating valve of the first intake pipe 100 connected to the first injector 5 and the second intake pipe 200 and the third intake pipe 300 connected to the first second injector 30 and the second second injector 30' can be adjusted. In addition, since the first second injector 30 and the second second injector 30' and the second intake pipe 200 and the third intake pipe 300 are symmetrically designed relative to the first injector 5, the overall nozzle seat 8 is T-shaped, which is beneficial to the balanced injection pressure of each injector.

Claims

1. An upward air inlet burner, characterized in that: Included The base (500) comprises an upper base body (501) and a lower base body (502) which are relatively combined; A first fire cover (3) is arranged on the central position of the upper seat body (501), and a first gas mixing chamber (1) located in the center is formed between the first fire cover and the upper seat body (501); The first ejector tube (2), the portion where the gas outlet (23) is located penetrates the base (500) and is located between the upper base body (501) and the lower base body (502), the gap between the outer peripheral wall of this portion and the upper base body (501) forms a buffer chamber (4), and the gas outlet (23) of the first ejector tube (2) is fluidically connected with the first gas mixing chamber (1) via the buffer chamber (4), while the portion where the gas inlet (24) of the first ejector tube (2) is located is located outside the base (500) and is adapted to be equipped with a first ejector (5); the first ejector tube (2) and the lower base body (502) are an integral part, and the portion of the lower base body (502) corresponding to the portion where the first ejector tube (2) penetrates is a part of the portion where the gas outlet (23) of the first ejector tube (2) is located; It also includes a second air mixing chamber (6) installed on the upper base (501) and located outside the first air mixing chamber (1) and independent of each other, the second air mixing chamber (6) including an inner ring wall surface (61) and an outer ring wall surface (62) arranged concentrically and spaced apart, a bottom wall (63) connecting the inner ring wall surface (61) and the outer ring wall surface (62), and a second fire cover (7) covering the inner ring wall surface (61) and the outer ring wall surface (62), and the upper base (501) and the tube wall of the first ejector tube (2) are directly connected to the inner ring wall surface (61) at the rest of the upper base (501) and the tube wall of the first ejector tube (2); The upper seat (501) partially extends toward the bottom wall (63); the portion where the first ejector tube (2) penetrates includes an inverted U-shaped upper tube wall (231); the lower seat (502) includes a first plate (5021); a lower tube wall (5022) capable of being matched with the upper tube wall (231) is partially protruded upward on the surface of the first plate (5021); correspondingly, a portion of the first plate (5021) outside the lower tube wall (5022) extends toward the bottom wall (63) and is connected to the upper seat (501) to form a closed section (5011); In the airflow direction, from the air inlet (24) to the air outlet (23), the cross-sectional areas of the upper tube wall (231) and the lower tube wall (5022) gradually increase; The inner ring wall surface (61) forms an annular cavity (611), and the wall of the first ejector tube (2) and the upper seat (501) and the annular cavity (611) form a secondary air passage (10) connecting the outside world and the fire outlet area of ​​the first fire cover (3).

2. The upward air inlet burner according to claim 1, characterized in that: The first ejector (5) is arranged on a nozzle seat (8) below the second gas mixing chamber (6). The first ejector (5) is arranged at a central position of the nozzle seat (8) and extends above a mounting seat (20) above the nozzle seat (8). The first ejector (5) also includes a second ejector (30, 30') which is also arranged on the nozzle seat (8) and is spaced apart from the first ejector (5), and a second ejector tube (40, 40') which is independent of the first ejector tube (2) and is arranged in the second gas mixing chamber (6). The gas inlet end (41) of the second ejector tube (40, 40') is opposite to the second ejector (30, 30'), while the gas outlet end (42) is connected to the second gas mixing chamber (6).

3. The upward air inlet burner according to claim 2, characterized in that: It also includes a primary air channel (50), which is formed at a location on the outer ring wall (62) corresponding to the nozzle seat (8) and partially recessed inwardly along the radial direction of the second air mixing chamber (6); the inwardly recessed portion of the outer ring wall (62) directly serves as a partition (620) that separates the primary air channel (50) and the secondary air channel (10), and the partition (620) is provided with an air inlet end (41) of the second ejector tube and an air inlet (24) of the first ejector tube (2).

4. The upward air inlet burner according to claim 3 is characterized in that: The bottom wall (63) of the second air mixing chamber (6) has at least one recessed portion at the other portion of the periphery of the primary air passage (50) to form a support foot (60), and the gaps formed between adjacent support feet (60) are connected to the secondary air passage (10), and the secondary air passage (10) and the primary air passage (50) are independent of each other.

5. The upward air inlet burner according to claim 4, characterized in that: A recess (601, 602) for accommodating the second ejector tube is formed in the support foot (60).

6. The upward air inlet burner according to claim 5, characterized in that: A pressure stabilizing member (9) for stabilizing the pressure of the gas in the second gas mixing chamber (6) is arranged in the second gas mixing chamber (6); the pressure stabilizing member (9) can partially extend into the recesses (601, 602).

7. The upward air inlet burner according to claim 6, characterized in that: The voltage stabilizing member (9) comprises a second plate body (91), the center of the second plate body (91) is provided with a central hole (911), the hole wall of the central hole (911) protrudes upward to form a convex wall (9111) that can surround the annular cavity (611), and the outer periphery of the second plate body (91) extends in the horizontal direction and can partially cover the recess (601, 602).

8. The upward air inlet burner according to claim 7, characterized in that: The second ejector tube (40, 40') is formed by an upper tube body (43) and a lower tube body (44) that are adapted in shape, wherein the lower tube body (44) is formed by a local depression at the bottom of the support leg (60), and the upper tube body (43) is formed by a depression from bottom to top at the outer periphery of the second plate body (91).

9. The upward air inlet burner according to any one of claims 3 to 7, characterized in that: The second fire cover (7) includes an annular body, the inner edge and the outer edge of the annular top wall (71) of the body respectively extend downward to form an inner ring wall (72) connected to the inner ring wall surface (61) and an outer ring wall (73) connected to the outer ring wall surface (62), and the outer ring wall (73) is provided with a main fire hole (731).

10. The upward air inlet burner according to claim 9, characterized in that: The air inlet end (7312) of the main fire hole (731) is located at the bottom end of the outer ring wall (73), and the air outlet end (7311) of the main fire hole (731) is located at the outer ring wall (73). The outer ring wall (73) is circumferentially provided with a first groove (732) below the air outlet end (7311) of the main fire hole (731), and a first flame stabilizing hole (733) connected to the first groove (732) is also provided at the bottom end of the outer ring wall (73).

11. The upward air inlet burner according to claim 10, characterized in that: The first groove (732) gradually slopes upward from bottom to top and intersects with the main fire hole (731).

12. The upward air inlet burner according to claim 11, characterized in that: The outer ring wall (73) extends outward to form a protective umbrella that shields the top of the nozzle seat (8).

13. The upward air inlet burner according to claim 12, characterized in that: The outer wall (73) gradually extends downward from top to bottom in a radially outward direction of the second gas mixing chamber (6).

14. The upward air inlet burner according to any one of claims 2 to 7, characterized in that: The first fire cover (3) comprises a top cover (31) and an outer annular wall (32) extending downward from the top cover (31), the outer annular wall (32) being provided with an inner fire hole (321) connected to the first gas mixing chamber (1) and a second flame stabilizing hole (322) located above and / or below the inner fire hole (321).

15. A stove using the upper air inlet burner according to any one of claims 2 to 14, comprising a panel (201), characterized in that: The mounting seat (20) is a part of the panel (201).

16. A stove using the upper air inlet burner according to any one of claims 2 to 14, comprising a liquid receiving tray (200) located below the burner, characterized in that: The liquid receiving tray (200) serves as the mounting seat (20).

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