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, comprising a base accommodating a first ejector pipe, a connecting plate arranged on the base, the connecting plate having a vertical first gas channel and being able to cover the base, a first fire cover arranged on a connecting body, and a first air mixing chamber located in the center is formed between the connecting body and the connecting body, the first air mixing chamber corresponding to the first gas channel, characterized in that: the first ejector pipe is transversely arranged in the base, the inner cavity of the first ejector pipe is a transition section and a trumpet section in sequence along the air flow direction from the air inlet to the air outlet, the trumpet section and the lower surface of the first gas channel form a buffer cavity, compared with the prior art, the advantage of the present invention is that the first ejector pipe is arranged in the base and has a buffer cavity, the buffer cavity effectively increases the length of the first ejector pipe, and at the same time, the setting of the buffer cavity enables the primary air / gas mixture ejected from the air outlet end of the first ejector pipe to have a buffer space.

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] A base, accommodating a first ejector tube:

[0011] A connecting body, arranged on the base, comprising a first plate body, wherein the central position of the first plate body has a vertical first gas channel, and the outer periphery of the first plate body extends in the horizontal direction and can cover the base;

[0012] A first fire cover is disposed on the connecting body and forms a first gas mixing chamber located in the center between the first fire cover and the first gas channel of the connecting body;

[0013] The buffer chamber, the gas outlet end of the first ejector pipe is fluidly connected with the first gas mixing chamber through the buffer chamber, and the gas inlet end of the first ejector pipe is adapted to be equipped with a first ejector.

[0014] The buffer chamber can be arranged in various forms, such as being located above, below or around the first ejector tube, or in other ways. The first ejector tube is formed integrally with the base, and the gap between the tube wall of the first ejector tube and the first gas channel forms the buffer chamber.

[0015] From the perspective of convenient processing, the first ejector tube is formed integrally with the base, and the gap between the tube wall of the first ejector tube and the first gas channel forms the buffer chamber.

[0016] In order to realize the connection between the connecting body and the base, the inner cavity of the first ejector pipe is composed of a transition section and a trumpet section in sequence along the air flow direction from the air inlet to the air outlet, and the trumpet section and the lower surface of the first gas channel form the buffer cavity. The transition section of the first ejector pipe is provided with a protrusion protruding upward toward the outer peripheral edge of the first plate body, and the base and the outer peripheral edge of the first plate body are connected by fasteners passing through the protrusion.

[0017] In order to enable the user to separately control the central fire and peripheral fire formed by the burner, the system also includes a mounting seat and a second air mixing chamber arranged on the mounting seat, 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, and the second fire cover is directly connected to the outer peripheral edge of the first plate body.

[0018] In order to provide sufficient secondary air to the first fire cover, the inner wall forms an annular cavity, the base is arranged to penetrate the annular cavity horizontally, and forms a secondary air channel between the base and the annular cavity to connect the outside and the fire area of ​​the first fire cover.

[0019] 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 independently arranged in the second air mixing chamber from the first injector tube, the air inlet of the second injector tube is opposite to the second injector, and the air outlet 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.

[0020] 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 of the second ejector tube and an air inlet end of the first ejector tube.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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 base.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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 ring wall extending downward from the top cover, and correspondingly, the first plate body is provided with a convex ring for the outer ring wall to abut against, and the outer ring wall is provided with an inner fire hole connected to the first mixing chamber and a second flame stabilizing hole located above the inner fire hole.

[0032] In order to further stabilize the flame of the inner fire hole, a second groove is circumferentially opened on the outer annular wall below the inner fire hole, and a third flame stabilizing hole connected to the second groove is opened on the outer annular wall.

[0033] Furthermore, the second groove gradually tilts toward the inner fire hole from bottom to top, and forms a gap with the convex ring. The size of the outlet formed by the gap determines the size of the third flame stabilization, and the size of the outlet can be determined according to design requirements. Due to the inclined setting of the second groove, the mixed gas finally flows out for combustion after collision, and the airflow velocity is low, which also plays a good role in stabilizing the flame.

[0034] 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.

[0035] 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.

[0036] Compared with the prior art, the advantage of the present invention is that the first ejector tube is arranged in the base and has a buffer cavity, which effectively increases the length of the first ejector tube. At the same time, the setting of the buffer cavity can make the primary air / gas mixture ejected from the outlet end of the first ejector tube have a buffer space. The primary air evenly mixed by the buffer cavity is mixed with the gas and the primary air to enter the first gas channel, avoiding the gas and the primary air from colliding with each other when converging from different directions, further improving the uniformity of the mixing of the primary air and the gas, and improving the primary air intake rate. At the same time, it can also effectively reduce the kinetic energy loss and make it diffuse evenly, so that the ignition area supplied by the first mixing chamber to the first fire cover can maintain a stable and uniform flame, so that the flame of the upper air inlet burner is short, uniform 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

[0037] 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;

[0038] 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);

[0039] Figure 3 for Figure 2 A schematic diagram of the decomposed structure from one angle;

[0040] Figure 4 for Figure 2 A cross-sectional view at an angle;

[0041] Figure 5 Schematic diagram of the structure of the gas mixing chamber in an embodiment of the present invention;

[0042] Figure 6 A schematic structural diagram of a voltage stabilizer in an embodiment of the present invention;

[0043] Figure 7 for Figure 5 The structural diagram of the voltage stabilizer is omitted;

[0044] Figure 8 This is a schematic structural diagram of a second fire cover at an angle in an embodiment of the present invention;

[0045] Fig. 9 This is a schematic structural diagram of the second fire cover at another angle in an embodiment of the present invention;

[0046] Fig.10 Schematic diagram of the structure of the bottom of the mixing chamber in an embodiment of the present invention. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below with reference to the accompanying drawings.

[0048] like Figures 1 to 10 The best embodiment of this embodiment is shown. The upper air inlet burner of the present embodiment includes a base 11, which accommodates the base 11 of the first ejector tube 2, a connecting body 12 arranged on the base 11, and the connecting body 12 includes a first plate body 121, and the central position of the first plate body 121 has a vertical first gas channel 122, and the outer peripheral edge 123 of the first plate body 121 extends in the horizontal direction and can cover the base 11, and a first fire cover 3 is arranged on the connecting body 12 and forms a first gas mixing chamber 1 located in the center between the connecting body 12, and the first gas mixing chamber 1 corresponds to the first gas channel 122. In addition, the first ejector tube 2 is transversely arranged in the base 11. In the present embodiment, the first ejector tube 2 is a split structure including a lower tube wall 111 formed by a partial downward depression of the base 11 to form the first ejector tube 2, and an upper tube wall 112 adapted to the lower shape of the first ejector tube 2. The inner cavity of the first ejector tube 2 is a transition section 21 and a trumpet section 22 along the air flow direction from the air inlet 41 to the air outlet 42. The trumpet section 22 is arranged in sequence. A buffer chamber 4 is formed on the lower surface of the section 22 and the first gas channel 122. The outlet end 23 located at the upper end of the first ejector tube 2 is fluidly connected with the first mixing chamber 1 through the buffer chamber 4. The inlet end 24 located at the lower end of the first ejector tube 2 is adapted to be equipped with a first injector 5. The buffer chamber 4 and the inner cavity of the first ejector tube 2 together form a horizontal "U"-shaped ejection channel, which 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 outlet end 7311 of the first ejector tube 2 have a buffer space. The primary air evenly mixed by the buffer chamber 4 is mixed with the gas and the primary air to enter the first gas channel 122, avoiding the gas and the primary air from merging from different directions and colliding with each other, further improving the uniformity of the mixing of the primary air and the 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 1 to the first fire cover 3 can maintain a stable and uniform flame.

[0049] In order to enable the user to individually control the central fire and peripheral fire formed by the burner, it also includes a mounting seat 20 and a second mixing chamber 6 arranged on the mounting seat 20 and located outside the first mixing chamber 1 and independent of each other. The second mixing chamber 6 includes an inner circle wall 61 and an outer circle wall 62 concentrically spaced and a bottom wall 63 connecting the inner circle wall 61 and the outer circle wall 62. The inner circle wall 61 and the outer circle wall 62 are covered with a second fire cover 7. The inner circle wall 61, the outer circle wall 62, the bottom wall 63 and the second fire cover 7 together enclose the second mixing chamber 6. In order to achieve the compactness of the overall structure of the burner, the connection between the first fire cover 3, the second fire cover 7 and the base 11 is realized. The second fire cover 7 is directly connected to the outer peripheral edge 123 of the first plate body 121, and the transition section 21 of the first ejector pipe 2 is provided with a protrusion 211 protruding upward toward the outer peripheral edge 123 of the first plate body 121. The base 11 and the outer peripheral edge 123 of the first plate body 121 are connected by fasteners such as screws passing through the protrusion 211. In order to increase the ejection length of the first ejector pipe 2, the inner wall 61 of the second mixing chamber 6 is surrounded by an annular cavity 611, and the base 11 is arranged to penetrate the annular cavity 611 horizontally, and a secondary air channel 10 connecting the outside and the fire outlet area of ​​the first fire cover 3 is formed between the base 11 and the annular cavity 611. In addition, it also includes a nozzle seat 8 arranged below the second air mixing chamber 6, a 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, a second injector is also arranged on the nozzle seat 8 and spaced apart from the first injector 5, and a second injector pipe independently of the first injector pipe 2 and arranged in the second air mixing chamber 6, the air inlet 41 of the second injector pipe is opposite to the second injector, and the air outlet 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 for 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 41 of the second ejector pipe and an air inlet end 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.

[0050] At the same time, since the support foot 60 formed at the concave part is hollow, not only the first groove 732601 for accommodating the first and second ejector tubes 40 and the second groove 323602 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 groove 732601 and the second groove 323602. 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, and 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.

[0051] 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 ring wall 32 extending downward from the top cover 31. Correspondingly, a convex ring 1211 is convexly provided on the first plate body 121 for the outer ring wall 32 to abut against. The outer ring wall 32 is provided with an inner fire hole 321 connected to the first gas mixing chamber 1 and a second flame stabilizing hole 322 located above the inner fire hole 321. In order to further stabilize the flame of the inner fire hole 321, a second groove 323 is circumferentially provided on the outer ring wall 32 below the inner fire hole 321. A third flame stabilizing hole 324 connected to the second groove 323 is provided on the outer ring wall 32, wherein the second groove 323 gradually inclines toward the inner fire hole 321 from bottom to top, and a gap 325 is formed between the second groove 323 and the convex ring 1211. The size of the outlet formed by this gap 325 determines the size of the third flame stabilization, and the size of the outlet can be determined according to design requirements. Because the second groove 323 is inclined, the mixed gas is impacted and finally flows out to burn, and the air flow speed is low, which also plays a good role in stabilizing the flame.

[0052] 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. To adjust the size of the peripheral fire and the central fire, adjust the regulating valve of the first intake pipe 100 connected to the first injector 531 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′. 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 (11) accommodates the first ejector tube (2): A connecting body (12) is arranged on the base (11), and comprises a first plate (121), wherein the central position of the first plate (121) has a vertical first gas channel (122), and the outer peripheral edge (123) of the first plate (121) extends in the horizontal direction and can cover the base (11); A first fire cover (3) is arranged on the connecting body (12), and a first gas mixing chamber (1) located in the center is formed between the first fire cover and the first gas channel (122) of the connecting body (12); a buffer chamber (4), wherein the gas outlet end (23) of the first ejector tube (2) is in fluid communication with the first gas mixing chamber (1) via the buffer chamber (4), and the gas inlet end (24) of the first ejector tube (2) is adapted to be equipped with a first ejector (5); the first ejector tube (2) is transversely arranged in the base (11), and the buffer chamber (4) is located between the first ejector tube (2) and the first gas channel; It also includes a mounting seat (20) and a second air mixing chamber (6) which is arranged on the mounting seat (20) and is located outside the first air mixing chamber (1) and is independent of each other, the second air mixing chamber (6) including an inner ring wall surface (61) and an outer ring wall surface (62) which are arranged concentrically and spaced apart, and a bottom wall (63) connecting the inner ring wall surface (61) and the outer ring wall surface (62), the inner ring wall surface (61) and the outer ring wall surface (62) are covered with a second fire cover (7), the inner ring wall surface (61), the outer ring wall surface (62), the bottom wall (63) and the second fire cover (7) are jointly arranged to form the second air mixing chamber (6), and the second fire cover (7) is directly connected to the outer peripheral edge (123) of the first plate body (121); The second fire cover (7) includes an annular body, the outer edge of the annular top wall (71) of the body is downwardly extended with an outer ring wall (73) connected with the outer ring wall surface (62), a main fire hole (731) is opened on the outer ring wall (73), the gas outlet end (7311) of the main fire hole (731) is located on the outer ring wall (73), and the outer ring wall (73) is circumferentially opened with a first groove (732) below the gas outlet end (7311) of the main fire hole (731), 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.

2. The upward air inlet burner according to claim 1, characterized in that: The first ejector tube (2) and the base (11) are integrally formed, and the gap between the tube wall of the first ejector tube (2) and the first gas channel (122) forms the buffer chamber (4).

3. The upward air inlet burner according to claim 2, characterized in that: The inner cavity of the first ejector tube (2) is composed of a transition section (21) and a bell section (22) in sequence along the air flow direction from the air inlet to the air outlet, and the buffer cavity (4) is formed between the bell section (22) and the first gas channel (122). A protrusion (211) is protruded upwardly from the transition section (21) of the first ejector tube (2) toward the outer peripheral edge of the first plate body, and the base (11) and the outer peripheral edge of the first plate body (121) are connected to each other by fasteners passing through the protrusion (211).

4. The upward air inlet burner according to claim 1, characterized in that: The inner ring wall surface (61) forms an annular cavity (611), and the base (11) is arranged to penetrate the annular cavity (611) transversely, and a secondary air passage (10) is formed between the base and the annular cavity (611) to connect the outside world with the fire outlet area of ​​the first fire cover (3).

5. The upward air inlet burner according to claim 4, 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 pipe (40, 40') which is independently arranged in the second gas mixing chamber (6) from the first ejector pipe (2). The gas inlet (41) of the second ejector pipe (40, 40') is opposite to the second ejector (30, 30'), while the gas outlet (42) is connected to the second gas mixing chamber (6).

6. The upward air inlet burner according to claim 5, 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 (41) of the second ejector tube and an air inlet end (24) of the first ejector tube (2).

7. The upward air inlet burner according to claim 6, characterized in that: The bottom wall (63) of the second air mixing chamber (6), excluding the portion outside the primary air passage (50), has at least one recessed portion to form a support leg (60), and the gaps formed between adjacent support legs (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.

8. The upward air inlet burner according to claim 7, characterized in that: A recess (601, 602) for accommodating the second ejector tube is formed in the support foot (60).

9. The upward air inlet burner according to claim 8, 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).

10. The upward air inlet burner according to claim 9, 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).

11. The upward air inlet burner according to claim 10, 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).

12. The upward air inlet burner according to any one of claims 5 to 11, characterized in that: The inner edge of the annular top wall (71) of the annular body of the second fire cover (7) extends downward to form an inner ring wall (72) engaged with the inner ring wall surface (61).

13. The upward air inlet burner according to claim 12, 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 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).

14. The upward air inlet burner according to claim 13, characterized in that: The first groove (732) gradually slopes upward from bottom to top and intersects with the main fire hole (731).

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

16. The upward air inlet burner according to claim 15, 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).

17. The upward air inlet burner according to any one of claims 4 to 10, characterized in that: The first fire cover (3) comprises a top cover (31) and an outer ring wall (32) extending downward from the top cover (31); correspondingly, a convex ring (1211) is convexly provided on the first plate body (121) for the outer ring wall (32) to abut against; the outer ring wall (32) is provided with an inner fire hole (321) connected to the first gas mixing chamber (1) and a second flame stabilizing hole (322) located above the inner fire hole (321).

18. The upward air inlet burner according to claim 17, characterized in that: The outer annular wall (32) is provided with a second groove (323) circumferentially below the inner fire hole (321), and the outer annular wall (32) is provided with a third flame stabilizing hole (324) connected to the second groove (323).

19. The upward air inlet burner according to claim 18, characterized in that: The second groove (323) gradually inclines toward the inner fire hole (321) from bottom to top, and forms a gap (325) between the second groove (323) and the protruding ring (1211).

20. A stove using the upper air inlet burner according to any one of claims 1 to 19, comprising a panel (201), characterized in that: The mounting seat (20) is a part of the panel (201).

21. A stove using the upper air inlet burner according to any one of claims 1 to 19, 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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