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 and a stove using the upper air inlet burner, which is characterized by comprising a base, a connecting body arranged on the base, a first ejector pipe which penetrates the connecting body transversely, a first fire cover which is arranged on the base and forms a first air mixing chamber located in the center between the first ejector pipe and the base, the tube wall of the first ejector pipe has an opening corresponding to the position of the first air mixing chamber, the connecting body has a primary air chamber which is fluidically connected to the first air mixing chamber at the air inlet end corresponding to the first ejector pipe. Compared with the prior art, the present invention has the advantage that the first ejector pipe penetrates the base transversely, which effectively increases the length of the first ejector pipe on the one hand, and the setting of the primary air chamber can make the primary air at the air inlet end of the first ejector pipe more sufficient, avoid the gas and the primary air from colliding with each other due to the convergence of different directions, and improve the uniformity of the mixing of the primary air and the gas.

Description

Technical Field

[0001] The invention relates to a burner of a gas stove, in particular to an upper air intake type stove burner with multiple nozzles and a stove using the stove burner. 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.

[0003] 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

[0004] 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 primary air / gas in view of the above-mentioned prior art status.

[0005] The second technical problem to be solved by the present invention is to provide an upward air inlet burner in response to the above-mentioned prior art status, which can effectively reduce the overall height of the burner and prevent the nozzle from being blocked by overflow liquid.

[0006] The third 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.

[0007] The fourth 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.

[0008] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: the upper air inlet burner includes a base, which is characterized in that it also includes:

[0009] A connector, arranged on the base;

[0010] A first ejector tube, which transversely penetrates the connector; and

[0011] The first fire cover is arranged on the first ejector pipe, and a first air mixing chamber is formed in the center between the first ejector pipe and the first ejector pipe; the tube wall of the first ejector pipe has an opening corresponding to the position of the first air mixing chamber, and the mixed gas after the mixture of the fuel gas and the primary air flows into the first air mixing chamber; the connecting body has a primary air chamber corresponding to the air inlet end of the first ejector pipe, which is fluidically connected with the first air mixing chamber; the air inlet end of the first ejector pipe is adapted to be equipped with a first injector in the primary air chamber.

[0012] In order to solve the second technical problem, in order to ensure that the length of the first ejector tube is effectively extended without causing the overall height of the upper air inlet burner to be too high, the primary air chamber of the present invention has a special design. Preferably, the primary air chamber of the connector includes a first wall where the air inlet end of the first ejector tube is located, a second wall opposite to the first wall, a third wall and a fourth wall connecting the first wall and the second wall, and a top wall covering the first wall, the second wall, the third wall and the fourth wall. The first wall, the second wall, the third wall and the fourth wall of the primary air chamber and the top wall all constitute a "protective wall" to prevent overflow from clogging the first ejector. For this reason, the primary air chamber has the function of preventing overflow from clogging.

[0013] In order to realize that the burner has two circles of fire, inner and outer rings, preferably, the connecting body is also provided with the second ejector tube and the third ejector tube which penetrate the connecting body transversely, the air outlet of the second ejector tube is connected with the second outer uniform flow cavity, the air outlet end of the third ejector tube is connected with the second outer uniform flow cavity, and the air inlet of the second ejector tube and the air inlet end of the third ejector tube are both located on the first wall surface of the primary air chamber.

[0014] Furthermore, the connector is provided with a flow equalizer plate for equalizing the outflow of the gas from the second ejector tube and the third ejector tube on the second ejector tube and the third ejector tube, and the connector also includes a bottom plate located below the first ejector tube, the bottom plate, the flow equalizer plate and the third wall of the primary air chamber together form a first outer flow equalizer cavity, and the bottom plate, the flow equalizer plate and the fourth wall of the primary air chamber together form a second outer flow equalizer cavity. The design of the flow equalizer plate can increase the uniformity of the mixture of the primary air and the gas in the second ejector tube and the third ejector tube, so that the connector integrates the functions of preventing overflow and supplying the "buffer cavity" of the primary air.

[0015] The structure of the flow plate can be of various types:

[0016] One is: the flow equalizer is annular, and the width of the flow equalizer gradually decreases along the direction of the gas flowing out of the outlet of the second ejector tube to the first outer flow equalizer cavity and the direction of the gas flowing out of the outlet end of the third ejector tube to the second outer flow equalizer cavity.

[0017] The second is: the flow equalizer plate is annular, and the flow equalizer plate includes a first flow equalizer portion corresponding to the direction of the gas flowing out of the second ejector tube to the first outer flow equalizer cavity, and the first flow equalizer portion is provided with at least two first flow equalizer holes, and the opening size of each of the first flow equalizer holes gradually increases along the flow path of the gas; and the flow equalizer plate includes a second flow equalizer portion corresponding to the direction of the gas flowing out of the third ejector tube to the second outer flow equalizer cavity, and the second flow equalizer portion is provided with at least two second flow equalizer holes, and the opening size of each of the second flow equalizer holes gradually increases along the flow path of the gas.

[0018] The third is that the flow equalizer is semi-circular and is correspondingly arranged on the gas outlet of the second ejector tube and the gas outlet end of the third ejector tube, and the flow equalizer is provided with at least two flow equalizer holes for gas to flow out. The three flow equalizers all play the role of equalizing the gas volume of the gas flow close to the gas outlet of the second ejector tube and the gas outlet end of the third ejector tube and the gas flow far from the gas outlet of the second ejector tube and the gas outlet end of the third ejector tube.

[0019] The flow equalizer plate has a wide width corresponding to the gas outlet near the second ejector tube and the gas outlet end of the third ejector tube, which can quickly slow down the speed of the gas hitting the flow equalizer plate, and has a narrow width at the gas outlet far away from the second ejector tube and the gas outlet end of the third ejector tube, which can accelerate the speed of the gas on the flow equalizer plate, thereby achieving uniform distribution of the gas;

[0020] The second flow equalizer plate is provided with at least two first flow equalizer holes and a second flow equalizer hole. The opening sizes of the first flow equalizer holes and the second flow equalizer holes corresponding to the gas outlet of the second ejector tube and the gas outlet end of the third ejector tube are smaller, which can quickly slow down the speed of the gas hitting the flow equalizer plate, while the opening sizes of the first flow equalizer holes and the second flow equalizer holes far away from the gas outlet of the second ejector tube and the gas outlet end of the third ejector tube are larger, which can accelerate the speed of the gas on the flow equalizer plate, thereby achieving uniform distribution of the gas.

[0021] The third flow equalizer plate, corresponding to the third flow equalizer hole close to the gas outlet of the second ejector tube and the gas outlet end of the third ejector tube, can quickly slow down the speed of the gas hitting the flow equalizer plate, thereby achieving uniform distribution of the gas.

[0022] Furthermore, the connector is provided with a second fire cover, the second fire cover includes an annular upper wall, an inner annular wall extending downward from the inner edge of the annular upper wall, and an outer annular wall extending downward from the outer edge of the annular upper wall, the outer annular wall having a first annular outer step and a second annular outer step from top to bottom, the first annular outer step including a first annular wall surface located above the step and a second annular wall surface located below the step, the second annular outer step including a third annular wall surface located below the second annular wall surface and a third annular wall surface located below the third annular wall surface Four annular walls, the fourth annular wall protrudes outward more than the third annular wall, the fourth annular wall corresponds to the inclined surface of the peripheral wall where the air outlet end of the first ejector tube is located, and the fourth annular wall is connected to the bottom wall of the connector, and the flow equalizer plate has a convex wall connected to the inner annular wall, the second fire cover and the connector together form a second air mixing chamber located outside the first air mixing chamber, and the fourth annular wall of the second fire cover abuts against the air outlet end of the first ejector tube, thereby realizing the mutual independence of the second flow equalizer chamber and the third flow equalizer chamber. Ingeniously, when the fourth annular wall of the second fire cover presses against the outlet end of the first ejector tube, the first ejector tube acts as a "partition plate" between the second uniform flow chamber and the third uniform flow chamber, thereby realizing the mutual independence of the second uniform flow chamber and the third uniform flow chamber, thereby realizing independent control of the second injector and the third injector, and can more conveniently control the firepower of the outer ring fire. Finally, the outlets of the first ejector tube, the second ejector tube and the third ejector tube are all in the second mixing chamber, and no additional sealing structure is required to reduce the cost expenditure caused by adding sealing measures.

[0023] Preferably, the first annular wall surface is gradually inclined outward from top to bottom, the second annular wall surface is gradually inclined inward from top to bottom, the third annular wall surface and the fourth annular wall surface are gradually inclined outward from top to bottom, an angle a is formed between the third annular wall surface and the base, and an angle β is formed between the fourth annular wall surface and the base, wherein the angle a<β. In this way, the second fire cover can constitute a blocking structure of the first ejector tube while constituting the second gas mixing chamber, thereby making the structure of the air intake burner more concise as a whole.

[0024] Further, the first fire cover includes a fire cover body, the fire cover body includes a first outer annular wall and a first top wall, the first outer annular wall of the fire cover body includes a first wall annular surface gradually inclined outward from top to bottom and a second wall annular surface gradually inclined inward from top to bottom from the first wall annular surface, the first wall annular surface is provided with at least two fire outlet holes spaced apart along the circumferential direction, the first wall annular surface has a guide channel for guiding overflow between at least one pair of adjacent fire outlet holes, the liquid inlet of the guide channel is provided on the first top wall, and the liquid outlet of the guide channel is provided on the second wall annular surface.

[0025] In order to prevent the fire outlet from being blocked by overflowing liquid, preferably, a circle extending outward from the outer peripheral edge of the first top wall of the fire cover body is used to cover the convex circle of the first outer ring wall.

[0026] In order to prevent the overflow from blocking the ignition hole, preferably, the first wall annular surface of the ignition cover body is provided with an ignition hole adjacent to the ignition needle, and the wall surface of the first wall annular surface corresponding to the ignition hole is recessed radially inward with a first groove. The provision of the first groove allows the overflow to flow away closer to the first wall surface of the first groove, thereby enhancing the anti-blocking property of the ignition hole.

[0027] In order to prevent overflow from entering the first groove and causing blockage of the ignition hole, preferably, the protrusion of the first top wall of the fire cover body corresponding to the position of the first groove has a first waterproof platform extending outwardly in the radial direction of the fire cover body.

[0028] In order to prevent the overflow from blocking the ignition hole, preferably, a fire-keeping hole is provided on the first wall annular surface of the fire cover body near the position of the thermocouple, and a second groove is recessed radially inwardly on the wall surface of the first wall annular surface corresponding to the fire-keeping hole. The provision of the second groove allows more overflow to flow away near the first wall surface of the second groove, thereby enhancing the anti-blocking property of the fire-keeping hole.

[0029] In order to prevent overflowing liquid from entering the second groove and causing blockage of the fire protection hole, preferably, the convex ring of the first top wall of the fire cover body has a second waterproof platform extending outwardly in the radial direction of the fire cover body at the position corresponding to the second groove.

[0030] Furthermore, the surface of the first top wall of the fire cover body is at least partially recessed downward to form a groove for caching the overflow. The top wall surface of the fire cover body has a groove for storing the overflow, so that the overflow can be better cached on the top wall.

[0031] To solve the fourth technical problem, the present invention further provides a stove using the above-mentioned upper air inlet burner, comprising a panel, characterized in that: the base is a part of the panel. When cleaning, only the connecting body needs to be removed to leave the panel, which is easy to clean.

[0032] To solve the fourth technical problem, the present invention further provides a stove using the above-mentioned upper air inlet burner, comprising a liquid receiving pan located below the burner, characterized in that the liquid receiving pan serves as the base. When cleaning, only the connecting body needs to be removed to leave the liquid receiving pan, which is convenient for cleaning.

[0033] Compared with the prior art, the advantage of the present invention is that the first ejector tube runs through the base horizontally, which effectively increases the length of the first ejector tube on the one hand, and the setting of the primary air chamber can make the primary air at the air inlet end of the first ejector tube more sufficient, avoiding the collision of the fuel gas and the primary air from the convergence 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. At the same time, it can also effectively reduce the kinetic energy loss and make it diffuse evenly, so that the fire outlet 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

[0034] Figure 1 This is a schematic structural diagram of an upper air inlet burner in Example 1 of the present invention;

[0035] Figure 2 for Figure 1 Schematic diagram of the decomposition structure;

[0036] Figure 3 This is a schematic structural diagram of a connector at one angle in Example 1 of the present invention;

[0037] Figure 4 This is a schematic structural diagram of the connector from another angle in Example 1 of the present invention;

[0038] Figure 5 This is a structural schematic diagram of the connector at another angle in Example 1 of the present invention;

[0039] Figure 6 This is a schematic diagram of the structure of the second fire cover in Example 1 of the present invention;

[0040] Figure 7 is a cross-sectional view of the second fire cover in Embodiment 1 of the present invention;

[0041] Figure 8 This is a schematic diagram of the structure in which the upper air inlet burner is placed on a panel in Example 1 of the present invention;

[0042] Fig. 9 for Figure 8 A cross-sectional view at an angle;

[0043] Fig.10 for Figure 8 A cross-sectional view from another angle;

[0044] Fig.11 This is a schematic structural diagram of a first fire cover at an angle in Embodiment 1 of the present invention;

[0045] Fig.12 for Fig.11A cross-sectional view of

[0046] Fig.13 This is a schematic structural diagram of the first fire cover at another angle in Embodiment 1 of the present invention;

[0047] Fig.14 Schematic diagram of the structure of the upper air inlet burner in Example 2 of the present invention (omitting the second fire cover);

[0048] Fig.15 for Fig.14 A cross-sectional view at an angle;

[0049] Fig.16 Schematic diagram of the structure of the flow plate in Example 2 of the present invention;

[0050] Fig.17 Schematic diagram of the structure of the upper air inlet burner in Example 3 of the present invention (omitting the second fire cover);

[0051] Fig.18 Schematic diagram of the structure of the flow plate in Example 3 of the present invention;

[0052] Fig.19 Schematic diagram of the structure of the flow plate in Example 4 of the present invention. DETAILED DESCRIPTION

[0053] The present invention is further described in detail below with reference to the accompanying drawings.

[0054] Example 1

[0055] like Figures 1 to 13The upper air inlet burner of this embodiment includes a base, a connecting body 6 arranged on the base, a first ejector pipe 7 transversely penetrating the connecting body 6, and a first fire cover arranged on the first ejector pipe 7, and a first gas mixing chamber 10 located in the center is formed between the first ejector pipe 7, the tube wall of the first ejector pipe 7 has an opening 71 corresponding to the position of the first gas mixing chamber 10 for the mixed gas after the gas supply and the primary air to flow into the first gas mixing chamber 10, the connecting body 6 has a primary air chamber 8 in fluid communication with the first gas mixing chamber 10 at the gas inlet end 72 corresponding to the first ejector pipe 7, and the gas inlet end 72 of the first ejector pipe 7 is adapted to be equipped with a first injector 9 in the primary air chamber 8. The first ejector tube 7 runs through the base horizontally, which effectively increases the length of the first ejector tube 7 on the one hand, and the provision of the primary air chamber 8 can make the primary air at the air inlet end 402 of the first ejector tube 7 more sufficient, avoiding the collision of the fuel gas and the primary air from the convergence in 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 10 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 10 and the first fire cover of this embodiment are both easy-to-disassemble and install structures, which are convenient for users to clean.

[0056] Specifically, in order to ensure that the length of the first ejector tube 7 is effectively extended without causing the overall height of the upper air inlet burner to be too high, the primary air chamber 8 of the present embodiment has a special design, wherein the primary air chamber 8 of the connecting body 6 includes a first wall 81 where the air inlet end 72 of the first ejector tube 7 is located, a second wall 82 opposite to the first wall 81, a third wall 83 and a fourth wall 84 connecting the first wall 81 and the second wall 82, and a top wall 85 covering the first wall 81, the second wall 82, the third wall 83 and the fourth wall 84. The connecting body 6 has a flow equalizer 61 for equalizing the flow on the top wall 85 of the primary air chamber 8 extending toward the air outlet direction of the air inlet end 72 of the first ejector tube 7, and the flow equalizer 61 covers the first ejector tube 7. The first wall 81, the second wall 82, the third wall 83 and the fourth wall 84 and the top wall 85 of the primary air chamber 8 all constitute a "protective wall" to prevent overflow from clogging the first injector 9. For this reason, the primary air chamber 8 has the function of preventing overflow from clogging. In addition, the design of the flow plate 61 can increase the uniformity of the mixture of primary air and fuel gas. At the same time, the connector 6 integrates the functions of preventing overflow and supplying primary air as a "buffer chamber". Among them, the peripheral wall where the outlet end 73 of the first ejector pipe 7 is located gradually tilts toward the first fire cover from bottom to top, and the peripheral edge of the flow plate 61 extends to the upper end of the peripheral wall where the outlet end 73 of the first ejector pipe 7 is located. The connecting body 6 also includes a bottom plate 62 located under the first ejector tube 7, and the bottom plate 62, the flow equalizer plate 61 and the third wall 83 of the primary air chamber 8 together form a first outer flow equalizer cavity 63, and the bottom plate 62, the flow equalizer plate 61 and the fourth wall 84 of the primary air chamber 8 together form a second outer flow equalizer cavity 64, wherein the periphery of the bottom plate 62 extends to the lower end of the peripheral wall where the air outlet end 73 of the first ejector tube 7 is located, so that a first gap 65 connected to the first outer flow equalizer cavity 63 is provided between the periphery of the bottom plate 62 and the periphery of the flow equalizer plate 61, and a second gap 66 connected to the second outer flow equalizer cavity 64 is provided between the periphery of the bottom plate 62 and the periphery of the flow equalizer plate 61.A second fire cover 40 is provided on the connecting body 6, and the second fire cover 40 includes an annular upper wall 401, an inner annular wall 402 extending downward from the inner edge of the annular upper wall 401, and an outer annular wall 403 extending downward from the outer edge of the annular upper wall 401. The second fire cover 40 of this embodiment also has a particularity: the outer annular wall 403 of the second fire cover 40 has a first annular outer step 4031 and a second annular outer step 4032 from top to bottom, and the first annular outer step 4031 includes a The first annular wall surface 4031a and the second annular wall surface 4031b located below the step, the second annular outer step 4032 includes a third annular wall surface 4032a located below the second annular wall surface 4031b and a fourth annular wall surface 4032b located below the third annular wall surface 4032a, the fourth annular wall surface 4032b is more protruding outward than the third annular wall surface 4032a, and the fourth annular wall surface 4032b corresponds to the inclined surface of the peripheral wall where the gas outlet end 73 of the first ejector tube 7 is located The fourth annular wall 4032b of the second fire cover 40 is against the gas outlet end 73 of the first ejector tube 7, thereby realizing the mutual independence of the first outer uniform flow chamber 63 and the second outer uniform flow chamber 64, which is cleverly provided for when the fourth annular wall 4032b of the second fire cover 40 is against the gas outlet end 73 of the first ejector tube 7. When the air outlet end 73 of the ejector tube 7 is closed, the first ejector tube 7 serves as a "partition plate" between the first outer uniform flow chamber 63 and the second outer uniform flow chamber 64, thereby realizing the mutual independence of the first outer uniform flow chamber 63 and the second outer uniform flow chamber 64, thereby realizing independent control of the second ejector and the third ejector, and being able to more conveniently control the firepower of the outer ring fire. Finally, the air outlets 301 of the second ejector tube 30 and the third ejector tube 90 are both in the second mixing chamber, and no additional sealing structure is required to reduce the cost overhead caused by increasing sealing measures. To this end, when the second fire cover 40 covers the connecting body 6, the first ejector tube 7, the second ejector tube 30 and the third ejector tube 90 can be separated, the fuel gas and primary air ejected from the second ejector tube 30 can be supplied to the second fire cover 40 through the first gap 65, the fuel gas and primary air ejected from the third ejector tube 90 can be supplied to the second fire cover 40 through the second gap 66, and after being mixed through the second outer uniform flow cavity 64 and the third outer uniform flow cavity, flow to the fire outlet of the second fire cover 40, and the air inlet 302 of the second ejector tube 30 and the air inlet end 402 of the third ejector tube 90 are both located on the first wall 81 of the primary air chamber 8, and at the same time, the air inlet 302 of the second ejector tube 30 and the air inlet end 402 of the third ejector tube 90 are both located on the first wall 81 of the primary air chamber 8, so that the primary air of the second ejector tube 30 and the third ejector tube 90 can come from the primary air chamber 8, so that the primary air and fuel gas can be mixed more evenly.Furthermore, the flow plate 61 has at least two second uniform holes 611 corresponding to the first outer flow uniform chamber 63 for fluid communication between the two phases, and the flow plate 61 has at least two third uniform holes 612 corresponding to the second outer flow uniform chamber 64 for fluid communication between the two phases. In order to better achieve uniform mixing of the second gas mixing chamber, the second uniform holes 611 can make the gas and primary air flowing out of the second ejector pipe 30 pass through the first outer flow uniform chamber 63 for preliminary mixing, and then flow more evenly to the second gas mixing chamber through the second uniform holes 611. Correspondingly, the third uniform holes 612 can make the gas and primary air flowing out of the third ejector pipe 90 pass through the second outer flow uniform chamber 64 for preliminary mixing, and then flow more evenly to the second gas mixing chamber through the third uniform holes 612. When cleaning, you only need to remove the connector 6 to leave the panel or the base, which is easy to clean.

[0057] The first fire cover of the embodiment includes a fire cover body 1, which includes a first outer annular wall 11 and a first top wall 12. The first outer annular wall 11 of the fire cover body 1 includes a first wall annular surface 111 gradually inclined outward from top to bottom and a second wall annular surface 112 gradually inclined inward from top to bottom from the first wall annular surface 111. The first wall annular surface 111 is provided with at least two fire holes 2 spaced apart along the circumferential direction. The first wall annular surface 111 has a guide channel 3 for guiding overflow between at least one pair of adjacent fire holes 2. The liquid inlet 31 of the guide channel 3 is provided on the top wall 8512, and the liquid outlet 32 ​​of the guide channel 3 is provided on the second wall annular surface 112. The first outer ring wall 11 of the fire cover independently forms a space for guiding overflowing liquid, and at the same time, a guiding channel 3 for guiding overflowing liquid to the second ring surface 112 is arranged on the first wall ring surface 111 of the first outer ring wall 11, which can accelerate the discharge of overflowing liquid from the first top wall 12 without affecting the ignition of the ignition hole 2 on the first wall ring surface 111, so that the ignition hole 2 is not easily blocked. In order to prevent the overflowing liquid from blocking the ignition hole 2, a circle extending outward from the outer periphery of the first top wall 12 of the fire cover body 1 is used to shield the convex ring 121 of the outer ring wall 40311. In order to prevent overflow from blocking the ignition hole 4, the first wall annular surface 111 of the fire cover body 1 is provided with an ignition hole 4 near the ignition needle, and the first wall annular surface 111 is concave with a first groove 1111 radially inwardly corresponding to the wall surface of the ignition hole 4. The setting of the first groove 1111 can make more overflow flow away from the first wall annular surface 111 near the first groove 1111, thereby enhancing the anti-blocking property of the ignition hole 4. At the same time, in order to prevent overflow from entering the first groove 1111 and blocking the ignition hole 4, the convex ring 121 of the first top wall 12 of the fire cover body 1 has a first waterproof platform 1211 extending outwardly along the radial direction of the fire cover body 1 at the position corresponding to the first groove 1111. In addition, in order to prevent overflow from blocking the ignition hole 4, a fire-keeping hole 5 is provided at the position of the first wall annular surface 111 of the fire cover body 1 adjacent to the thermocouple, and a second groove 1112 is recessed radially inwardly on the wall surface of the first wall annular surface 111 corresponding to the fire-keeping hole 5. The second groove 1112 allows more overflow to flow away from the first wall annular surface 111 adjacent to the second groove 1112, thereby enhancing the anti-blocking property of the fire-keeping hole 5. Finally, in order to prevent overflow from entering the second groove 1112 and blocking the fire-keeping hole 5, a second waterproof platform 1212 extending outwardly along the radial direction of the fire cover body 1 is provided on the convex ring 121 of the first top wall 12 of the fire cover body 1 at a position corresponding to the second groove 1112.Since the first fire cover has a guide channel 3 for guiding overflow, there are two guide channels 3, which are circumferentially spaced apart between the first groove 1111 and the second groove 1112. Since the liquid inlet 31 of each guide channel 3 is opened on the first top wall 12, the liquid outlet 32 ​​of each guide channel 3 is opened on the second wall annular surface 112, and the flow portion of each guide channel 3 is opened on the first wall annular surface 111, once overflow remains in the groove 121 during the cooking process, it can flow into and pass through the liquid guide portion located on the first wall annular surface 111 through the liquid inlets 31 of the two guide channels 3, and finally flow out through the liquid outlet 32 ​​without affecting the ignition of the ignition hole 2 on the first wall annular surface 111.

[0058] Finally, the present embodiment further provides a stove using the above-mentioned upper air inlet burner, including a panel, on which a liquid tray 2000 is arranged, and the liquid tray 2000 is used as a base. When cleaning, only the connector 6 needs to be removed to leave the liquid tray 2000, which is easy to clean. In order to reduce the heat conduction in contact with the liquid tray 2000 and improve the thermal efficiency, the second mixing chamber uses a support connection method of a support column 5000. 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 first ejector 9 draws primary air from the outside into the primary air chamber 8 by the kinetic energy of the gas itself, performs premixing of the primary air and the gas, and respectively enters the first gas mixing chamber 10. The mixed primary air and gas finally pass through the fire holes of the first fire cover and are ignited together with the secondary air of the external environment to form an inner ring fire. The second fire cover 40 also includes a peripheral fire that can be controlled separately by the user. The primary air and gas required for the peripheral fire are input into the second gas mixing chamber by the second ejector pipe 30 and the third ejector pipe 90 independently of the first ejector pipe 7. When the second air mixing chamber is separated from the first air mixing chamber 10, the fluid separation of the second air mixing chamber and the first air mixing chamber 10 is achieved in this way, 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 7, the second ejector pipe 30, and the third ejector pipe 90. If the size of the peripheral fire and the center fire is to be adjusted, the first intake pipe 1000 connected to the first injector 9 and the second intake pipe 3000 connected to the second injector 500 and the third intake pipe 4000 of the third injector 600 are adjusted. A regulating valve of the connected main air intake pipe can be used. In addition, since the second injector 500 and the third injector 600 as well as the second air intake pipe 3000 and the third air intake pipe 4000 are symmetrically designed relative to the first injector 9, it is beneficial to balance the injection pressure of each injector. At the same time, the first injector 9, the second injector 500 and the third injector 600 are hidden in the primary air chamber 8 of the connector 6, so that the first injector 9, the second injector 500 and the third injector 600 can be effectively prevented from being blocked when the pot overflows, and a cup-free structure is realized, which is easy to clean.

[0059] Example 2

[0060] The structure is basically the same as that of Example 1, and the only difference is that the structure of the flow plate is different. The flow plate 61' of this embodiment is annular, and the flow plate 61' is along the direction of the gas flowing out of the gas outlet 301 of the second ejector tube 30 to the first outer flow chamber 63 and the direction of the gas flowing out of the gas outlet end 401 of the third ejector tube 90 to the second outer flow chamber 64. The width of the flow plate 61' gradually decreases. The width of the flow plate 61' corresponding to the gas outlet 301 close to the second ejector tube 30 and the gas outlet end 401 of the third ejector tube 90 is wide, which can quickly slow down the speed of the gas hitting the flow plate 61', and the width is narrow at the gas outlet 301 far away from the second ejector tube 30 and the gas outlet end 401 of the third ejector tube 90, which can accelerate the speed of the gas on the flow plate 61', thereby achieving uniform distribution of the gas (such as Figures 14 to 16 As shown, the straight dashed arrow indicates the direction of the gas outlet of the ejector pipe, and the semi-arc arrow indicates the flow direction of the gas in the second gas mixing chamber).

[0061] Example 3

[0062] The structure is basically the same as that of Example 1, and the only difference is that the structure of the flow equalizer is different. The flow equalizer of this embodiment is annular, and the flow equalizer 61" includes a first flow equalizer portion 611" corresponding to the direction of the gas flowing out of the second ejector tube 30 to the first outer flow equalizer cavity 63, and at least two first flow equalizer holes 611a" are opened on the first flow equalizer portion 611", and the opening size of each first flow equalizer hole 611a" gradually increases along the flow path of the gas, and the flow equalizer plate 61" includes a second flow equalizer portion 612" corresponding to the direction of the gas flowing out of the third ejector tube 90 to the second outer flow equalizer cavity 64, and at least two second flow equalizer holes 612a" are opened on the second flow equalizer portion 612", and the opening size of each second flow equalizer hole 612a" gradually increases along the flow path of the gas. Since at least two first flow holes 611a" and second flow holes 612a" are provided on the flow plate 61", the opening sizes of the first flow holes 611a" and the second flow holes 612a" corresponding to the gas outlet 301 of the second ejector tube 30 and the gas outlet end 401 of the third ejector tube 90 are smaller, which can quickly slow down the speed of the gas hitting the flow plate 61", while the opening sizes of the first flow holes 611a" and the second flow holes 612a" far away from the gas outlet 301 of the second ejector tube 30 and the gas outlet end 401 of the third ejector tube 90 are larger, which can accelerate the speed of the gas on the flow plate 61", thereby achieving uniform distribution of the gas (such as Fig.17 and 18 shown).

[0063] Example 4

[0064] The structure is basically the same as that of Example 1, with the only difference being that the structure of the flow plate is different. The flow plate 61″′ of this embodiment is semi-annular and is correspondingly arranged on the gas outlet 301 of the second ejector tube 30 and the gas outlet end 401 of the third ejector tube 90. The flow plate 61″′ is provided with at least two third flow holes 611″′ for gas to flow out, corresponding to the third flow holes 611″′ close to the gas outlet 301 of the second ejector tube 30 and the gas outlet end 401 of the third ejector tube 90, which can quickly slow down the speed of the gas hitting the flow plate 61″′, thereby achieving uniform distribution of the gas (such as Fig.19 shown).

Claims

1. A top air inlet burner, comprising a base, characterized in that: Also included are: A connector (6) is arranged on the base; A first ejector tube (7) transversely passes through the connecting body (6); and A first fire cover is arranged on the first ejector tube (7), and a first air mixing chamber (10) is formed between the first ejector tube (7) and the first ejector tube (7); the wall of the first ejector tube (7) has an opening (71) at a position corresponding to the first air mixing chamber (10) for a mixed gas after the fuel gas and the primary air are mixed to flow into the first air mixing chamber (10); the connecting body (6) has a primary air chamber (8) in fluid communication with the first air mixing chamber (10) corresponding to the air inlet end (72) of the first ejector tube (7); the air inlet end (72) of the first ejector tube (7) is fitted with a first injector (9) in the primary air chamber (8); The primary air chamber (8) of the connecting body (6) comprises a first wall surface (81) where the air inlet end (72) of the first ejector tube (7) is located, a second wall surface (82) opposite to the first wall surface (81), a third wall surface (83) and a fourth wall surface (84) connecting the first wall surface (81) and the second wall surface (82), and a top wall (85) covering the first wall surface (81), the second wall surface (82), the third wall surface (83) and the fourth wall surface (84); The connecting body (6) is also provided with a second ejector tube (30) and a third ejector tube (90) which are transversely passed through the connecting body (6); the connecting body (6) is also provided with a flow equalizer plate on the second ejector tube (30) and the third ejector tube (90) for equalizing the flow of the gas flowing out of the second ejector tube (30) and the third ejector tube (90); the connecting body (6) also includes a bottom plate (62) located below the first ejector tube (7); the bottom plate (62), the flow equalizer plate (61) and the third wall surface (83) of the primary air chamber (8) together form a first outer flow equalizer cavity (63); the bottom plate (62), the flow equalizer plate (61) and the fourth wall surface (84) of the primary air chamber (8) together form a second outer flow equalizer cavity (64); The air outlet (301) of the second ejector tube (30) is connected to the first outer uniform flow chamber (63), the air outlet end of the third ejector tube (90) is connected to the second outer uniform flow chamber (64), and the air inlet (302) of the second ejector tube (30) and the air inlet end of the third ejector tube (90) are both located on the first wall surface (81) of the primary air chamber (8).

2. The upward air inlet burner according to claim 1, characterized in that: The flow equalizer (61; 61´; 61"; 61´´´) is annular, and the width of the flow equalizer (61; 61´; 61"; 61´´´) gradually decreases along the direction of the gas flowing out of the gas outlet (301) of the second ejector tube (30) to the first outer flow equalizer cavity (63) and the direction of the gas flowing out of the gas outlet end of the third ejector tube (90) to the second outer flow equalizer cavity (64).

3. The upward air inlet burner according to claim 2, characterized in that: The flow equalizer plate (61; 61´; 61"; 61´"´) is annular, and comprises a first flow equalizer portion (611") corresponding to the direction of the gas flowing out of the second ejector tube (30) to the first outer flow equalizer cavity (63), and at least two first flow equalizer holes (611a") are formed on the first flow equalizer portion (611"), and the opening size of each of the first flow equalizer holes (611a") gradually increases along the flow path of the gas.

4. The upward air inlet burner according to claim 3 is characterized in that: The flow equalizer plate (61; 61´; 61"; 61´´´) is annular, and comprises a second flow equalizer portion (612") corresponding to the direction of the gas flowing out of the third ejector tube (90) to the second outer flow equalizer cavity (64), and at least two second flow equalizer holes (612a") are formed on the second flow equalizer portion (612"), and the opening size of each of the second flow equalizer holes (612a") gradually increases along the flow path of the gas.

5. The upward air inlet burner according to claim 1, characterized in that: The flow equalizer plate (61; 61´; 61"; 61´´´) is semi-annular and is correspondingly arranged on the gas outlet (301) of the second ejector tube (30) and the gas outlet end of the third ejector tube (90). The flow equalizer plate (61; 61´; 61"; 61´´´) is provided with at least two third flow equalizer holes (611´´´) for the gas to flow out.

6. The upward air inlet burner according to any one of claims 1 to 5, characterized in that: The connecting body (6) is provided with a second fire cover (40), the second fire cover (40) comprising an annular upper wall (401), an inner annular wall (402) extending downward from the inner edge of the annular upper wall (401), and an outer annular wall (403) extending downward from the outer edge of the annular upper wall (401), the outer annular wall (403) comprising a first annular outer step (4031) and a second annular outer step (4032) from top to bottom, the first annular outer step (4031) comprising a first annular wall surface (4031a) located above the step and a second annular wall surface (4031b) located below the step, the second annular outer step (4032) comprising a third annular wall surface (4032a) located below the second annular wall surface (4031b) and a fourth annular wall surface (4032b) located below the third annular wall surface (4032a), The fourth annular wall surface (4032b) is more outwardly protruding than the third annular wall surface (4032a), and the fourth annular wall surface (4032b) corresponds to the inclined surface of the peripheral wall where the gas outlet end (73) of the first ejector tube (7) is located, and the fourth annular wall surface (4032b) is connected to the bottom wall of the connecting body (6), the flow equalizing plate (61; 61´; 61"; 61´´´) or the connecting body (6) has a convex wall (610) connected to the inner annular wall (402), the second fire cover (40) and the connecting body (6) together form a second gas mixing chamber located outside the first gas mixing chamber (10), and the fourth annular wall surface (4032b) of the second fire cover (40) abuts against the gas outlet end (73) of the first ejector tube (7), thereby realizing the mutual independence of the first outer flow equalizing chamber (63) and the second outer flow equalizing chamber (64).

7. The upward air inlet burner according to claim 6, characterized in that: The first annular wall surface (4031a) is gradually inclined outward from top to bottom, the second annular wall surface (4031b) is gradually inclined inward from top to bottom, the third annular wall surface (4032a) and the fourth annular wall surface (4032b) are both gradually inclined outward from top to bottom, an angle a is formed between the third annular wall surface (4032a) and the base, and an angle β is formed between the fourth annular wall surface (4032b) and the base, wherein the angle a<β.

8. The upward air inlet burner according to claim 7, characterized in that: The first fire cover comprises a fire cover body (1), the fire cover body (1) comprises a first outer annular wall (11) and a first top wall (12), the first outer annular wall (11) of the fire cover body (1) comprises a first wall annular surface (111) gradually inclined outward from top to bottom and a second wall annular surface (112) gradually inclined inward from top to bottom of the first wall annular surface (111), the first wall annular surface (111) is provided with at least two fire outlet holes (2) spaced apart along the circumferential direction, the first wall annular surface (111) has a guide channel (3) for guiding overflow between at least one pair of adjacent fire outlet holes (2), the liquid inlet (31) of the guide channel (3) is provided on the first top wall (12), and the liquid outlet (32) of the guide channel (3) is provided on the second wall annular surface (112).

9. The upward air inlet burner according to claim 8, characterized in that: The outer peripheral edge of the first top wall (12) of the fire cover body (1) extends outwardly in a circle for covering the convex circle (121) of the first outer ring wall (11).

10. The upward air inlet burner according to claim 9, characterized in that: An ignition hole (4) is provided on the first wall annular surface (111) of the ignition cover body (1) at a position adjacent to the ignition needle, and a first groove (1111) is recessed radially inwardly on the wall surface of the first wall annular surface (111) corresponding to the ignition hole (4).

11. The upward air inlet burner according to claim 10, characterized in that: The convex ring (121) of the first top wall (12) of the fire cover body (1) has a first waterproof platform (1211) extending outwardly in the radial direction of the fire cover body (1) at a position corresponding to the first groove (1111).

12. The upward air inlet burner according to any one of claims 8 to 11, characterized in that: A fire protection hole (5) is provided on the first wall annular surface (111) of the fire cover body (1) at a position adjacent to the thermocouple, and a second groove (1112) is recessed radially inwardly on the wall surface of the first wall annular surface (111) corresponding to the fire protection hole (5).

13. The upward air inlet burner according to claim 12, characterized in that: The convex ring (121) of the first top wall (12) of the fire cover body (1) has a second waterproof platform (1212) extending outwardly in the radial direction of the fire cover body (1) at a position corresponding to the second groove (1112).

14. The upward air inlet burner according to claim 13, characterized in that: The surface of the first top wall (12) of the fire cover body (1) is at least partially recessed downward to form a groove for caching overflow liquid.

15. A stove using the upper air inlet burner according to any one of claims 8 to 14, comprising a panel, characterized in that: The base is a part of the panel.

16. A cooking appliance using the upper air inlet burner according to any one of claims 8 to 14, comprising a liquid receiving pan located below the burner, characterized in that: The liquid receiving tray (2000) serves as the base.

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