A burner for a gas stove

Abstract

The present invention relates to a burner for a gas stove, the burner comprises a base, a central gas channel arranged at the center of the base, the central channel is a cylindrical structure with an opening facing upward, and an inner ring fire cover, the inner ring fire cover comprises an annular wall connected to the top of the central gas channel, a fire outlet portion arranged on the annular wall and a top cover covering the annular wall, characterized in that: the inner wall of the central gas channel has an annular liquid collecting groove, the bottom of the annular liquid collecting groove is connected to a third elastic member, compared with the prior art, the advantage of the present invention is that when the pot is placed on the inner ring, the top cover of the inner ring fire cover can be at least partially pressed down, thereby increasing the distance between the inner ring fire cover and the bottom of the pot, in addition, once overflow enters the annular liquid collecting groove from the inner ring fire cover, the overflow is prevented from affecting the nozzle of the central gas channel, and at the same time, in the process of pressing down the top cover of the inner ring fire cover, the overflow in the annular liquid collecting groove can be assisted to flow out from the fire outlet portion.

Description

Technical Field

[0001] The invention relates to the field of gas stoves, and in particular to a burner for a gas stove capable of turning off the fire by lifting a pot. Background Art

[0002] At present, large tabletop frying stoves and medium-pressure frying stoves often need to turn on the gas first, then use an ignition rod or an ignition gun to ignite, and finally turn on the air supply system before normal burning, frying and other tasks can be performed. The operation is very inconvenient, and during the intervals of adding seasonings, plating and repeating operations, the fire is still burning continuously, and the waste of oil and gas fuel is huge. The air supply system does not stop working, resulting in a waste of electricity. For this purpose, a Chinese utility model patent "Fully Automatic Energy-Saving Stove" with patent number ZL200420034149.3 (publication number CN2731307Y) discloses a fully automatic energy-saving stove including a stove body, characterized in that it also includes a control rod and a follower stick, the follower stick is placed in the stove body, and can move up and down as the pot on the stove body is placed and lifted; the lower end of the follower stick is movably connected to the control rod in a manner that the lower end of the follower stick is connected to one end of the control rod, and the other end is rotatably fixed to the stove body. When the pot is placed on the stove, the follower stick is subjected to pressure and moves downward, causing the movable end of the control rod to move downward, thereby connecting the fuel control switch, the ignition control switch, and the blower control switch, connecting the supply of oil and gas fuel and igniting, turning on the blower, and starting the fully automatic energy-saving stove. When the pot is lifted, the follower moves upward, and the moving end of the control rod moves upward, disconnecting the fuel control switch, ignition control switch, and blower control switch, so that the fully automatic energy-saving stove stops working, thereby realizing ignition when the pot is put down and closing when the pot is lifted. The switch and ignition control switch are controlled by the up and down movement of the follower, but this control method has high requirements for the circuit part.

[0003] At present, when the burner is burning, due to the entrainment effect of the combustion hot air flow, the inner and outer fire covers will draw primary air and secondary air through the mixing chamber. In order to prevent the inner and outer rings from affecting each other when drawing secondary air and to achieve full combustion of the inner and outer rings at the same time, further improvements are needed. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide a burner for a gas stove which can change the size of the inner ring fire and has a good anti-overflow effect in view of the above-mentioned existing technical status.

[0005] The second technical problem to be solved by the present invention is to provide a burner for a gas stove that can effectively avoid the inner and outer rings from influencing each other when entraining secondary air in response to the above-mentioned existing technical status.

[0006] The third technical problem to be solved by the present invention is to provide a burner for a gas stove that can easily realize the outer ring fire when the pot is placed on the stove and can also effectively supplement the secondary air during the cooking process in response to the above-mentioned existing technical status.

[0007] The fourth technical problem to be solved by the present invention is to provide a burner for a gas stove which can effectively improve the combustion efficiency 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 burner for the gas stove comprises:

[0009] Pedestal;

[0010] A central gas channel, which is a cylindrical structure with an opening facing upward and is arranged at the center of the base;

[0011] An inner ring fire cover, the inner ring fire cover includes an annular wall connected to the top of the central gas channel, a fire outlet portion arranged on the annular wall and a top cover covering the annular wall, characterized in that the annular wall of the inner ring fire cover has an annular liquid collecting groove extending radially inward for containing overflow liquid, a third elastic member is connected to the bottom of the annular liquid collecting groove, the upper end of the third elastic member is connected to the top cover, and the third elastic member enables the top cover to always have a tendency to return to be flush with the top opening of the central gas channel.

[0012] Furthermore, the annular liquid collecting trough includes a vertical convex edge extending toward the center, and a first flow outlet for the fuel gas to flow to the fire outlet is formed between the top of the vertical convex edge and the top cover of the inner ring fire cover.

[0013] In order to adapt to the situation that the cookware is a pointed pot and avoid the bottom of the pointed pot pressing on the inner ring fire cover, preferably, a movable part is arranged in the central gas channel, and the gap between the outer wall of the movable part and the central gas channel forms a channel for replenishing gas to the fire outlet, and the channel has a second flow outlet fluidly connected to the first flow outlet, and the movable part also includes a driving rod that can be elastically arranged in the cavity of the movable part, and the outer periphery of the driving rod is provided with a lower shielding part spaced apart from the top cover, and the lower shielding part is arranged above the second flow outlet, and a gas flow outlet for gas to flow into the first flow outlet is formed between the lower shielding part and the second flow outlet, and when the head of the driving rod is placed on it by the cookware, the movable part can be forced to move downward relative to the central gas channel, and the top cover can at least partially shield the fire outlet, thereby changing the gas outlet area of ​​the fire outlet, and the lower shielding part can reduce the size of the gas flow outlet, thereby changing the amount of gas flowing into the fire outlet. When the pointed bottom pot is placed on the head of the driving rod, the head of the driving rod can be retracted into the outer sleeve (at this time, the first elastic part is compressed), and drive the outer sleeve, the top cover of the inner ring fire cover and the shrinkage part to move downward relative to the fixed seat (at this time, the second elastic part and the third elastic part are compressed), thereby driving the outer shielding part to move downward, so that the main fire part can be exposed. At the same time, in order to prevent the pointed bottom pot from pressing the inner ring fire, the top cover and the shielding part can move downward with the outer sleeve, so that the top cover can at least partially block the fire part, thereby changing the gas outlet area of ​​the fire part, and the lower shielding part can reduce the size of the gas outlet, thereby changing the amount of gas flowing into the fire part, and then realizing adaptive adjustment of the inner ring fire.

[0014] Furthermore, the movable part is divided into two parts from bottom to top according to the change of the cross section: a straight part adapted to the inner diameter of the central gas channel and a contraction part with the bell mouth facing upward, the tail of the driving rod is elastically located in the contraction part, and the central gas channel is provided with a fixed seat for the contraction part to move relative to it, and the second flow outlet is arranged at intervals on the straight part.

[0015] Furthermore, an outer sleeve is provided on the periphery of the driving rod, and a limiting groove is provided in the center of the contraction portion for relative movement of the outer sleeve. The outer sleeve is integrally provided with the inner ring fire cover, and a first supporting rod is provided at the bottom of the limiting groove. A first elastic member is connected between the upper end of the first supporting rod and the lower end of the driving rod, and the outer sleeve is sleeved on the periphery of the first supporting rod and has a gap between the bottom of the limiting groove. The setting of the first elastic member can make the head of the driving rod always have a tendency to be exposed on the top of the outer sleeve, and the top cover and the lower shielding portion are both provided on the outer sleeve. The outer sleeve can bear against the bottom of the pointed pot to prevent the bottom of the pointed pot from being too close to the inner ring fire cover. When the pot is placed on the head of the driving rod, the head of the driving rod can be retracted into the outer sleeve and can drive the contraction part to move downward relative to the fixed seat, thereby driving the outer shielding part to move downward, thereby exposing the main fire part. However, the bottom of the pointed pot always maintains a distance of the outer sleeve from the inner ring fire cover, and the bottom of the pointed pot presses the inner ring fire cover. When the user lifts the pot, the driving rod and the contraction part can both return to their initial state, and the outer shielding part moves upward, thereby covering the main fire part. In addition, in the process that the head of the driving rod can be retracted into the outer sleeve and can drive the contraction part to move downward relative to the fixed seat, thereby driving the outer shielding part to move downward, the top cover and the lower shielding part will both move downward with the outer sleeve, wherein the top cover can at least partially cover the fire outlet, thereby changing the gas outlet area of ​​the fire outlet, and the lower shielding part can reduce the size of the outflow port, thereby changing the amount of gas entering the cavity.

[0016] Furthermore, the bottom of the shrinkage portion has a radially inward shrinkage foot, and a second elastic member is sleeved on the shrinkage foot. The end of the second elastic member is connected to the central pipe of the fixed seat. The setting of the second elastic member makes the shrinkage portion always have a tendency to return to its original position.

[0017] To solve the second technical problem, preferably, the method further comprises:

[0018] An outer ring gas channel is arranged at the outer periphery of the central channel of the base;

[0019] An outer ring fire cover is arranged on the outer ring gas channel and forms an outer and inner ring gas mixing chamber, and has a main fire part connected with the outer ring gas mixing chamber;

[0020] An air supplementation chamber is formed between the inner ring air mixing chamber and the outer ring air mixing chamber;

[0021] Secondary air supply channel: the base is also provided with a plurality of radial secondary air supply channels for connecting the air supply cavity with the outside at intervals along the circumferential direction;

[0022] The movable part also includes an outer shielding part for shielding the main fire part. The driving rod of the movable part can be directly triggered when the pot is placed on it, so as to expose the main fire part. The movable part also includes a partition arranged in the secondary air supply channel, and the partition can separate the secondary air supply channel into two relatively independent spaces, which are respectively connected to the main fire part area of ​​the outer ring mixing chamber and the fire outlet area of ​​the central mixing chamber. When the pot is placed on it, the movable part moves downward to expose the main fire part, and while forming the outer ring fire, it can also drive the partition to move downward so that the secondary air supply channel is divided into the main fire part area of ​​the outer ring mixing chamber and the outer wall area of ​​the central mixing chamber, which are respectively connected, effectively avoiding the hot air flow after combustion and the high temperature of the burner to supply the fire outlet area of ​​the fire outlet and the main fire part, and avoiding the mutual suction effect of the secondary air between the fire outlet and the main fire part, effectively improving the air supply effect, so that the burner will not have defects such as yellow flame and flashback.

[0023] Furthermore, the partition is an annular partition wall, the partition wall is connected to the straight part by a first horizontal connecting rod, an inverted L-shaped partition extends from the top of the partition wall to the first horizontal connecting rod, the peripheral shielding member is a vertical shielding plate, the vertical shielding plate is connected to the side wall of the partition wall by a second horizontal connecting rod, the bottom of the partition wall extends downward toward the second connecting rod, and a horizontal partition extends toward the secondary air supply channel. In the process of the drive rod driving the contraction part to move downward relative to the fixed seat, thereby driving the peripheral shielding member to move downward, the top cover and the lower shielding part will move downward with the outer sleeve, wherein the top cover can at least partially block the fire outlet, thereby changing the gas outlet area of ​​the fire outlet, and at the same time can drive the partition to move downward, and the horizontal partition of the partition can divide the secondary air supply channel into two, effectively avoiding the hot air flow after combustion and the high temperature of the burner to supply the fire outlet area of ​​the fire outlet and the main fire outlet, and avoiding the mutual suction effect of the secondary air between the fire outlet and the main fire outlet.

[0024] In order to better realize the lifting and closing of the outer ring fire, preferably, the outer ring fire cover includes an annular component and an annular body arranged in the annular component, and the annular body has a main fire part that is connected to the outer ring gas mixing chamber and can spray the mixed gas toward the inner ring fire cover. The annular body can be composed of at least two layers of thin sheet metal sheets and a corrugated fire cover sheet arranged between the thin sheet metal sheets. For this reason, due to the special design of the outer ring fire cover, the peripheral shielding member can be simply set as a vertical shielding plate.

[0025] The transmission member of the present invention also has a special design. Preferably, a transmission member for transmitting the gas in the outer ring gas channel to the annular member is arranged between the annular member and the outer ring gas channel. The transmission member includes an inner ring wall, an outer ring wall and a connecting wall connecting the inner ring wall and the outer ring wall, which are arranged concentrically and spaced apart. The connecting wall is provided with at least two vertical outer ring gas supply channels which are independent of the secondary gas supply channel and used to supply secondary air to the main fire part. The connecting wall is provided with a vertical connecting part connected to the outer ring gas channel and a horizontal connecting part which is located between two adjacent vertical connecting parts and extends radially outward on the inner side of each vertical outer ring gas supply channel, and the secondary gas supply channel radially passes through the bottom of the connecting wall. The main fire part of the outer ring fire cover of the present invention has two ways to supplement the secondary air, one is the vertical outer ring gas supply channel, and the other is to divide the secondary gas supply channel into a space which can be connected to the main fire part area of ​​the outer ring mixing chamber through the partition, so as to ensure the full combustion of the outer ring main fire part.

[0026] Furthermore, the transmission member is covered with an annular cover plate, which includes a first cover plate portion corresponding to the outer ring gas channel and a second cover plate portion corresponding to the horizontal connection portion, and gaps are formed between adjacent second cover plate portions for exposing the vertical outer ring gas supply channel, and the peripheral portion of each of the gaps is hinged with a third cover plate portion for covering the vertical outer ring gas supply channel. In order to enable the cookware to be placed on the movable member, thereby driving the outer shielding member to move downward, thereby exposing the main fire part, the third cover plate portion can also be pressed down at this time, so that the outer ring gas supply channel is exposed, and then the secondary air is added to the main fire part to promote the full combustion of the main fire part.

[0027] To solve the third technical problem, preferably, the third cover plate is provided with an actuator that can actuate the third cover plate to open or close relative to the vertical outer ring air supply channel, and the actuator can actuate the rotation of the third cover plate when triggered by the downward movement of the peripheral shielding member. In order to better actuate the third cover plate, the setting of the actuator can better achieve the ability to drive the third cover plate to rotate when the peripheral shielding member moves downward, thereby exposing the outer ring air supply channel, thereby replenishing secondary air to the main fire part, and promoting full combustion of the main fire part.

[0028] Furthermore, the tube wall of the central gas channel has a through hole for the horizontal connecting rod to pass through, and the head of the driving rod can directly move downward relative to the contraction part when the cookware is placed thereon, thereby driving the contraction part to move downward relative to the fixed seat, and finally driving the outer shielding part to move downward relative to the main fire part.

[0029] In order to realize the anti-dry burning function of the burner, preferably, the driving rod is a temperature sensor.

[0030] To solve the fourth technical problem, preferably, an energy collecting cover is provided on the annular component of the outer ring fire cover. The setting of the energy collecting cover can better collect the combustion heat generated by the outer ring fire cover during the combustion process, so as to better heat the pot bottom.

[0031] Compared with the prior art, the advantage of the present invention is that when the cookware is placed on the inner ring, the top cover of the inner ring fire cover can be at least partially pressed down, thereby increasing the distance between the inner ring fire cover and the bottom of the cookware, preventing the inner ring fire cover from being pressed down, and at the same time assisting the overflow in the annular liquid collecting groove to flow out from the fire outlet. In this way, once overflow enters the annular liquid collecting groove from the inner ring fire cover, the overflow can be quickly discharged to avoid affecting the nozzle of the central gas channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of a burner in an embodiment of the present invention;

[0033] Figure 2 for Figure 1 A cross-sectional view of

[0034] Figure 3 A schematic diagram of the structure of a transmission component at one angle in an embodiment of the present invention;

[0035] Figure 4 It is a structural schematic diagram of the transmission component in another angle in an embodiment of the present invention;

[0036] Figure 5 A cross-sectional view of a transmission member at one angle in an embodiment of the present invention;

[0037] Figure 6 is a cross-sectional view of the transmission member at another angle in the embodiment of the present invention;

[0038] Figure 7 It is a cross-sectional view of the burner in the embodiment of the present invention with the pot lifted and the outer ring fire closed;

[0039] Figure 8 It is a cross-sectional view of the burner in the cooking state (the pot is placed on the stove and the outer ring fire is turned on) according to the embodiment of the present invention;

[0040] Fig. 9 for Figure 8 The cross-sectional view of the movable parts is omitted;

[0041] Fig.10 A schematic diagram of the structure of a movable part at one angle in an embodiment of the present invention;

[0042] Fig.11 A schematic structural diagram of a movable part in another angle in an embodiment of the present invention;

[0043] Fig.12 Schematic diagram of the structure of the annular cover plate in an embodiment of the present invention;

[0044] Fig.13 for Figure 1 A cross-sectional view from another angle;

[0045] Fig.14 It is a cross-sectional view of a pointed bottom pot in a pot-standing state according to an embodiment of the present invention;

[0046] Fig.15 It is a cross-sectional view of the pointed pot in the pot sitting state according to the 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 15 As shown, it is the best embodiment of the present invention. The burner for the gas stove in this embodiment includes a base 1; a central gas channel 11 arranged in the central part of the base 1, the central gas channel 11 is a cylindrical structure with an opening facing upward, and also includes an inner ring fire cover 4, the inner ring fire cover 4 includes an annular wall 400 connected to the top of the central gas channel 11, a fire outlet 42 arranged on the annular wall 400 and a top cover 401 covering the annular wall 400, the inner wall of the central gas channel 11 has an annular liquid collecting groove 110 extending radially inward for containing overflow, the bottom of the annular liquid collecting groove 110 is connected to the third elastic member 9, the upper end of the third elastic member 9 is connected to the top cover 401, and the third elastic member 9 makes the top cover 401 always have a tendency to return to be flush with the top opening of the central gas channel 11. When the cookware is placed on the inner ring, the top cover 401 of the inner ring fire cover 4 can be at least partially pressed down, thereby increasing the distance between the inner ring fire cover 4 and the bottom of the cookware, preventing the inner ring fire cover 4 from being pressed down, and at the same time assisting the overflow in the annular liquid collecting groove 110 to flow out from the fire outlet 42. In this way, once overflow enters the annular liquid collecting groove 110 from the inner ring fire cover 4, the overflow can be quickly discharged to avoid affecting the nozzle of the central gas channel 11.

[0049] Specifically, the annular liquid collecting tank 110 includes a vertical convex edge 1101 extending toward the center, and a first flow outlet 112 for gas to flow to the fire outlet 42 is formed between the top of the vertical convex edge 1101 and the top cover 401 of the inner ring fire cover 4. A movable part 3 is arranged in the central gas channel 11, and a gap between the outer wall of the movable part 3 and the central gas channel 11 forms a channel 1100 for replenishing gas to the fire outlet 42. The channel 1100 has a second flow outlet 1121 in fluid communication with the first flow outlet 112, wherein the movable part 3 also includes a driving rod 34 that can be elastically arranged in the cavity 321 of the movable part 3, and a lower shielding part 341 is arranged on the periphery of the driving rod 34 and is spaced from the top cover 401. The lower shielding part 341 is arranged in the second flow outlet 1121. Above the outlet 1121, a gas flow outlet 1123 for gas to flow into the first flow outlet 112 is formed between the lower shielding portion 341 and the second flow outlet 1121. When the head of the driving rod 34 is placed on the cookware, the movable part 3 can be forced to move downward relative to the central gas channel 11. The top cover 401 can at least partially block the fire outlet 42, thereby changing the gas outlet area of ​​the fire outlet 42, and the lower shielding portion 341 can reduce the size of the gas flow outlet 1123, thereby changing the amount of gas flowing into the fire outlet 42. When the pointed bottom pot is placed on the head of the driving rod 34, the head of the driving rod 34 can be retracted into the outer sleeve 15 (at this time, the first elastic member 7 is compressed), and drive the outer sleeve 15, the top cover 401 of the inner ring fire cover 4 and the contraction part 32 to move downward relative to the fixed seat 111 (at this time, the second elastic member 8 and the third elastic member 9 are compressed), thereby driving the outer shielding member 3a to move downward, so that the main fire part 22 can be exposed. At the same time, in order to prevent the pointed bottom pot from pressing the inner ring fire, the top cover 401 and the lower shielding part 341 can move downward with the outer sleeve 5, so that the top cover 401 can at least partially block the fire outlet 42, thereby changing the gas outlet area of ​​the fire outlet 42, and the lower shielding part 341 can reduce the size of the gas outlet 1123, thereby changing the amount of gas flowing into the fire outlet 42, thereby realizing adaptive adjustment of the inner ring fire. The movable part 3 is divided into two parts from bottom to top according to the change of the cross section: a straight part 31 adapted to the inner diameter of the central gas channel 11 and a contraction part 32 with the bell mouth facing upward, the tail of the driving rod 34 is elastically located in the contraction part 32, and the central gas channel 11 is provided with a fixed seat 111 for the contraction part 32 to move relative to it.An outer sleeve 5 is arranged on the periphery of the driving rod 34, and a limiting groove 331 is provided in the center of the contraction part 32 for relative movement of the outer sleeve 5. The outer sleeve 5 is integrally arranged with the inner ring fire cover 4, and a first supporting rod 6 is arranged at the bottom of the limiting groove 331. A first elastic member 7 is connected between the upper end of the first supporting rod 6 and the lower end of the driving rod 34. The outer sleeve 5 is sleeved on the periphery of the first supporting rod 6 and has a gap between the bottom of the limiting groove 331. The setting of the first elastic member 7 can make the head of the driving rod 34 always have a tendency to be exposed on the top of the outer sleeve 5. The top cover 401 and the lower shielding part 341 are both arranged on the outer sleeve 5. The outer sleeve 5 can resist the bottom of the pointed pot to prevent the bottom of the pointed pot from being too close to the inner ring fire cover 4. When the pot is placed on the head of the driving rod 34, the head of the driving rod 34 can be retracted into the outer sleeve 5, and at the same time can drive the contraction part 32 to move downward relative to the fixed seat 111, thereby driving the outer shielding part 3a to move downward, so as to expose the main fire part 22, but the bottom of the pointed pot always maintains a distance of the outer sleeve 5 from the inner ring fire cover 4, and the bottom of the pointed pot presses the inner ring fire cover 4. When the user lifts the pot, the driving rod 34 and the contraction part 32 can both return to their initial positions. In the state, the outer shielding member 3a moves upward, thereby shielding the main fire part 22; in addition, when the head of the driving rod 34 can be retracted into the outer sleeve 5, it can drive the contraction part 32 to move downward relative to the fixed seat 111, thereby driving the outer shielding member 3a to move downward, the top cover 401 and the lower shielding member 341 will move downward with the outer sleeve 5, wherein the top cover 401 can at least partially shield the fire outlet 42, thereby changing the gas outlet area of ​​the fire outlet 42, and the lower shielding member 341 can reduce the size of the flow outlet 112, thereby changing the amount of gas entering the cavity 321. The bottom of the contraction part 32 has a contraction foot 332 that contracts inward in the radial direction, and the contraction foot 332 is sleeved with a second elastic member 8, and the end of the second elastic member 8 is connected to the central pipe of the fixed seat 111. The arrangement of the second elastic member 8 makes the contraction part 32 always have a tendency to return to the original position.

[0050] In order to realize the burner with inner and outer ring fires, the outer ring gas channel 12 is also provided at the peripheral part of the central gas channel 11 of the base 1, and the outer ring fire cover 2 is provided on the outer ring gas channel 12. The outer ring fire cover 2 and the outer ring gas channel 12 form an outer ring gas mixing chamber 21, and have a main fire part 22 connected to the outer ring gas mixing chamber 21; wherein an air supplement cavity 500 is formed between the inner ring gas mixing chamber 41 and the outer ring gas mixing chamber 21, and a plurality of radial gas supplement cavities 500 for connecting the inner ring gas mixing chamber 41 and the outer ring gas mixing chamber 21 are also provided on the base 1 at intervals along the circumferential direction. The movable part 3 also includes a peripheral shielding part 3a for shielding the main fire part 22, and the driving rod 34 of the movable part 3 can be directly triggered when the cookware is placed thereon, so as to expose the main fire part 22, and the movable part 3 also includes a partition 30 arranged in the secondary air supply channel 400, the partition 30 can divide the secondary air supply channel 400 into two relatively independent spaces, which are respectively connected to the main fire part 22 area of ​​the outer ring mixing chamber 21 and the fire outlet part 42 area of ​​the central mixing chamber. When the cookware is placed on it, the movable part 3 moves downward to expose the main fire part 22, forming an outer ring fire, and can also drive the partition part 30 to move downward, so that the secondary air supply channel 400 is divided into the main fire part 22 area connected to the outer ring mixing chamber 21 and the fire outlet part 42 area of ​​the central mixing chamber, so that secondary air can be supplied to the fire outlet part 42 and the fire outlet area of ​​the main fire part 22, effectively avoiding the hot air flow after combustion and the high temperature of the burner to produce mutual suction effect on the secondary air between the fire outlet part 42 and the main fire part 22, effectively improving the air supply effect, so that the burner will not have defects such as yellow flame and flashback. Furthermore, the partition portion is an annular partition wall, which is connected to the straight portion 31 by a first horizontal connecting rod 5d, and an inverted L-shaped partition 301 is extended from the top of the partition wall toward the first horizontal connecting rod 5d, and the outer shielding member 3a is a vertical shielding plate, which is connected to the side wall of the partition wall by a second horizontal connecting rod 5a, and the bottom of the partition wall extends downward toward the second horizontal connecting rod 5a, and a horizontal partition portion 301a is extended toward the secondary air supply channel 400. In order to better realize the lifting of the pot and turning off the fire of the outer ring fire, the outer ring fire cover 2 includes an annular component 23 and an annular body 24 arranged in the annular component 23, and the annular body 24 has a main fire part 22 which is connected with the outer ring mixing chamber 21 and can spray the mixed gas toward the inner ring fire cover 4. The annular body 24 can be composed of at least two layers of thin sheet metal sheets and a corrugated fire cover sheet arranged between the thin sheet metal sheets. For this reason, due to the special design of the outer ring fire cover 2, the outer shielding member 3a can be simply set as a vertical shielding plate.

[0051] In addition, refer to Figures 3 to 6As shown, the transmission member 600 of this embodiment also has a special design. A transmission member 600 for transmitting the gas in the outer ring gas channel 12 to the annular member 23 is arranged between the annular member 23 and the outer ring gas channel 12. The transmission member 600 includes an inner ring wall 6001, an outer ring wall 6002 and a connecting wall 6003 connecting the inner ring wall 6001 and the outer ring wall 6002. The connecting wall 6003 is provided with at least two vertical outer ring gas supplement channels 6004 which are independent of the secondary gas supplement channel 400 and are used to supplement the secondary air to the main fire part 22. The connecting wall 6003 corresponds to A vertical connection portion connected to the outer ring gas channel 12 and a horizontal connection portion 6006 located between two adjacent vertical connection portions and extending radially outward are provided on the inner side of each vertical outer ring air supply channel 6004, while the secondary air supply channel 400 radially penetrates the bottom of the connecting wall 6003. The main fire portion 22 of the outer ring fire cover 2 of this embodiment has two ways to supplement secondary air. One is the vertical outer ring air supply channel 6004, and the other is to separate the secondary air supply channel 400 into a space in the main fire portion 22 area that can be connected to the outer ring mixing chamber 21 through the partition, so as to ensure sufficient combustion of the outer ring main fire portion 22. The transmission member 600 is also covered with an annular cover plate 700, which includes a first cover plate portion 7001 corresponding to the outer ring gas channel 12 and a second cover plate portion 7002 corresponding to the horizontal connection portion 6006. A notch 7003 is formed between adjacent second cover plate portions 7002 for exposing the vertical outer ring gas supply channel 6004. The peripheral portion of each notch 7003 is hinged with a third cover plate portion 7004 for covering the vertical outer ring gas supply channel 6004. In order to enable the cookware to be placed on the movable member 3, thereby driving the outer shielding member 3a to move downward, so as to expose the main fire part 22, the third cover plate portion 7004 can also be pressed down at this time, so that the outer ring gas supply channel is exposed, and then the secondary air is added to the main fire part 22 to promote the full combustion of the main fire part 22. In addition, the third cover plate portion 7004 is provided with an actuator 800 which can actuate the third cover plate portion 7004 to open or close relative to the vertical outer ring air supply channel 6004. The actuator 800 can actuate the rotation of the third cover plate portion 7004 when triggered by the downward movement of the outer covering member 3a. In order to better actuate the third cover plate portion 7004, the setting of the actuator 800 can better drive the third cover plate portion 7004 to rotate when the outer covering member 3a moves downward, thereby exposing the outer ring air supply channel, thereby supplementing the secondary air to the main fire portion 22, and promoting the full combustion of the main fire portion 22.The tube wall of the central gas channel 11 has a through hole 110 for the horizontal connecting rod to pass through. The head of the driving rod 34 can directly move downward relative to the contraction part 32 when the pot is placed on it, and then drive the contraction part 32 to move downward relative to the fixed seat 111, and finally drive the peripheral shielding member 3a to move downward relative to the main fire part 22. The actuator 800 of this embodiment is an inverted L-shaped actuator block, the vertical part of which is connected to the third cover plate part 7004, and the horizontal part of which is used for the resistance of the peripheral shielding member 3a. Finally, in order to realize the anti-dry burning function of this burner, the driving rod 34 is a temperature sensor, and the annular part 23 of the outer ring fire cover 2 is provided with an energy collecting cover 900. The setting of the energy collecting cover 900 can make the combustion heat generated by the outer ring fire cover 2 during the combustion process be better gathered to better heat the bottom of the pot.

[0052] In summary, when the cookware is placed on the head of the driving rod 34, the head of the driving rod 34 can be retracted into the outer sleeve 5, and drive the outer sleeve 5, the inner ring fire cover 4 and the contraction part 32 to move downward relative to the fixed seat 111, thereby driving the outer shielding part 3a to move downward, so as to expose the main fire part 22, but the bottom of the cookware always maintains a distance of the outer sleeve 5 from the inner ring fire cover 4, and the bottom of the cookware presses the inner ring fire cover 4. Although the inner ring fire cover 4 moves downward relative to the central gas channel 11, the partition part of the movable part 3 can separate the secondary air channel, thereby realizing the separation of the secondary air supply channel 400 into two opposite The independent spaces are respectively connected to the main fire part 22 area of ​​the outer ring mixing chamber 21 and the fire outlet part 42 area of ​​the central mixing chamber. In addition, in the process of realizing the downward movement of the outer shielding member 3a, the third cover plate portion 7004 can also be pressed down to expose the outer ring air supply channel, and then continue to replenish secondary air to the main fire part 22 area of ​​the outer ring mixing chamber 21, thereby promoting the full combustion of the main fire part 22. When the user lifts the pot, the driving rod 34 and the contraction part 32 can both return to their initial state, and the outer shielding member 3a moves upward to cover the main fire part 22, thereby finally achieving the purpose of lifting the pot to close the outer ring fire.

[0053] In summary, the burner adapts to three different pot types during use and produces the following three situations:

[0054] a. Frying pan: When the frying pan is placed on the head of the driving rod 34, the contraction portion 32 can be driven to move downward relative to the fixing seat 111, thereby driving the outer shielding member 3a to move downward, thereby exposing the main fire portion 22. At this time, the second elastic member 8 is compressed (such as Fig.14 shown);

[0055] b. Pointed-bottom pot: Since the outer sleeve 5 can resist the bottom of the pointed pot, the distance between the bottom of the pointed pot and the inner ring top cover 4d of the inner ring fire cover 4 is prevented from being too close. When the pointed-bottom pot is placed on the head of the driving rod 34, it can drive the contraction part 32 to move downward relative to the fixed seat 111 (at this time, the second elastic member 8 is compressed) and drive the outer shielding member 3a to move downward, thereby exposing the main fire part 22. In addition, since the bottom of the pointed-bottom pot is sharper than that of the flat-bottom pot, the bottom of the pointed-bottom pot can prompt the head of the driving rod 34 to retract into the outer sleeve 5 (at this time, the first elastic member 7 is compressed), but the bottom of the pointed pot always maintains a distance of the outer sleeve 5 from the top cover 401 of the inner ring fire cover 4, and the bottom of the pointed pot presses the inner ring top cover 4d of the inner ring fire cover 4. When the user lifts the pot, the driving rod 34 and the contraction part 32 can both return to their initial state, and the outer shielding member 3a moves upward, thereby shielding the main fire part 22.

[0056] c. Pointed-bottom pot: When the pointed-bottom pot is placed on the head of the driving rod 34, the head of the driving rod 34 can be retracted into the outer sleeve 5 (at this time, the first elastic member 7 is compressed), and drive the outer sleeve 5, the inner ring top cover 4d of the inner ring fire cover 4 and the contraction part 32 to move downward relative to the fixed seat 111 (at this time, the second elastic member 8 and the third elastic member 9 are compressed), thereby driving the outer shielding member 3a to move downward, so that the main fire part 22 can be exposed. At the same time, a shielding part 340 is provided on the periphery of the driving rod 34, and when the head of the driving rod 34 is placed on the pot, it can move downward relative to the movable member 3, and then at least partially shield the movable member 3. The gas hole 322 is formed, thereby changing the air intake area of ​​the gas hole 322, but the bottom of the pointed bottom pot always maintains a distance of the outer sleeve 5 from the top cover 401 of the inner ring fire cover 4. Although the top cover 401 of the inner ring fire cover 4 moves downward relative to the central gas channel 11, the bottom of the pointed bottom pot always maintains a distance of the outer sleeve 5 from the inner ring top cover 4d of the inner ring fire cover 4, so as to prevent the bottom of the pointed bottom pot from pressing the top cover 401 of the inner ring fire cover 4. When the user lifts the pot, the driving rod 34 and the contraction part 32 can both return to the initial state, and the outer shielding part 3a moves upward to shield the main fire part 22, thereby finally achieving the purpose of lifting the pot to close the outer ring fire (such as Fig.15As shown). In addition, the shielding portion 340 arranged on the periphery of the driving rod 34 is arranged on the outer sleeve 5. Since the bottoms of the flat pan and the pointed bottom pan are not pointed enough, when they are placed on the head of the driving rod 34, they can maintain a distance of the outer sleeve 5 from the top cover 401 of the inner ring fire cover 4 to avoid suppressing the fire; and when the over-pointed bottom pan is placed on the head of the driving rod 34, it can drive the outer sleeve 5, the inner ring top cover 4d of the inner ring fire cover 4 and the contraction portion 32 to move downward relative to the fixed seat 111. In order to prevent the over-pointed bottom pan from suppressing the inner ring fire, the top cover 401 and the lower shielding portion 341 can move downward with the outer sleeve 15, so that the top cover 401 can at least partially block the fire outlet 42, thereby changing the gas outlet area of ​​the fire outlet 42, and the lower shielding portion 341 can reduce the size of the gas outlet 1123, thereby changing the amount of gas flowing into the fire outlet 42, and then realizing the adaptive adjustment of the inner ring fire. In order to further ensure safety, this embodiment preferably uses a primary air full premix burner or an electric control valve body to ensure that gas does not leak when the main fire part 22 of the outer ring fire cover 2 is blocked.

[0057] Regardless of the type of pan, whether it is a flat bottom pan, a pointed bottom pan or an overly pointed bottom pan, when placed on the head of the driving rod 34, it can drive the outer shielding member 3a downward to drive the partition 30 and the horizontal partition 301a of the partition 30 downward, thereby dividing the secondary air supply channel 400 into two relatively independent spaces, which are respectively connected to the main fire part 22 area of ​​the outer ring air mixing chamber 21 and the fire outlet part 42 area of ​​the central air mixing chamber.

Claims

1. A burner for a gas stove, the burner comprising: Base (1); A central gas channel (11), the central gas channel (11) being a cylindrical structure with an opening facing upward and arranged at the center of the base (1); An inner ring fire cover (4), the inner ring fire cover (4) comprising an annular wall surface (400) connected to the top of the central gas channel (11), a fire outlet (42) arranged on the annular wall surface (400), and a top cover (401) covering the annular wall surface (400), characterized in that: The annular wall surface (400) of the inner ring fire cover (4) has an annular liquid collecting groove (110) extending radially inward for containing overflow liquid, the bottom of the annular liquid collecting groove (110) is connected to a third elastic member (9), the upper end of the third elastic member (9) is connected to the top cover (401), and the third elastic member (9) enables the top cover (401) to always have a tendency to return to be flush with the top opening of the central gas channel (11); The annular liquid collecting tank (110) comprises a vertical convex edge (1101) extending toward the center, and a first flow outlet (112) for the fuel gas to flow toward the fire outlet (42) is formed between the top of the vertical convex edge (1101) and the top cover (401) of the inner ring fire cover (4); A movable part (3) is arranged in the central gas passage (11); a gap between the outer wall of the movable part (3) and the central gas passage (11) forms a passage (1100) for replenishing gas to the fire outlet (42); the passage (1100) has a second flow outlet (1121) in fluid communication with the first flow outlet (112); the movable part (3) further comprises a driving rod (34) which can be elastically arranged in the cavity (321) of the movable part (3); a lower shielding part (341) which is spaced apart from the top cover (401) is arranged on the periphery of the driving rod (34); the lower shielding part (341) is arranged on the periphery of the driving rod (34); the lower shielding part (341) is spaced apart from the top cover (401); 1) is arranged above the second flow outlet (1121), a gas flow outlet (1123) for gas to flow into the first flow outlet (112) is formed between the lower shielding portion (341) and the second flow outlet (1121), and when the head of the driving rod (34) is placed on the cookware, the movable part is forced to move downward relative to the central gas channel (11), the top cover (401) can at least partially shield the fire outlet (42), thereby changing the gas outlet area of ​​the fire outlet (42), and the lower shielding portion (341) can reduce the size of the gas flow outlet (1123), thereby changing the amount of gas flowing into the fire outlet (42).

2. The burner for a gas stove according to claim 1, characterized in that: The movable part (3) is divided into two parts from bottom to top according to the change of the cross section: a straight part (31) adapted to the inner diameter of the central gas channel (11) and a contraction part (32) with a bell mouth facing upwards, the tail of the driving rod (34) is elastically located in the contraction part (32), and the central gas channel (11) is provided with a fixed seat (111) capable of allowing the contraction part (32) to move relative thereto, and the second flow outlets are arranged at intervals on the straight part (31).

3. The burner for a gas stove according to claim 2, characterized in that: An outer sleeve (5) is arranged on the periphery of the driving rod (34), and a limiting groove (331) is provided in the center of the contraction part (32) for relative movement of the outer sleeve (5). The outer sleeve (5) is integrally arranged with the inner ring fire cover (4), and a first supporting rod (6) is arranged at the bottom of the limiting groove (331). A first elastic member (7) is connected between the upper end of the first supporting rod (6) and the lower end of the driving rod (34). The outer sleeve (5) is sleeved on the periphery of the first supporting rod (6) and has a gap with the bottom of the limiting groove (331). The setting of the first elastic member (7) can make the head of the driving rod (34) always have a tendency to be exposed at the top of the outer sleeve (5). The top cover (401) and the lower shielding part (341) are both arranged on the outer sleeve (5).

4. The burner for a gas stove according to claim 3, characterized in that: The bottom of the contraction portion (32) has a contraction foot (332) that contracts inwardly in the radial direction, and a second elastic member (8) is sleeved on the contraction foot (332). The end of the second elastic member (8) is connected to the central pipe of the fixing seat (111). The arrangement of the second elastic member (8) enables the contraction portion (32) to always have a tendency to return to its original position.

5. The burner for a gas stove according to any one of claims 2 to 4, characterized in that: Also included are: An outer ring gas channel (12) is arranged at the outer periphery of the central gas channel (11) of the base (1); An outer ring fire cover (2) is arranged on the outer ring gas channel (12) and forms an outer ring gas mixing chamber (21), and has a main fire part (22) connected to the outer ring gas mixing chamber (21); An air supplementation cavity (500) is formed between the inner annular air mixing chamber (41) and the outer annular air mixing chamber (21); A secondary air supply channel (4000), wherein the base (1) is also provided with a plurality of radial secondary air supply channels (4000) spaced apart along the circumferential direction for connecting the air supply cavity (500) with the outside; The movable part (3) also includes an outer shielding part (3a) for shielding the main fire part (22); the driving rod (34) of the movable part (3) can be directly triggered when the cookware is placed thereon, thereby exposing the main fire part (22); and the movable part (3) also includes a partition (30) arranged in the secondary air supply channel (4000); the partition (30) can divide the secondary air supply channel (4000) into two relatively independent spaces, respectively connecting the main fire part (22) area of ​​the outer ring mixing chamber (21) and the fire outlet part (42) area of ​​the inner ring mixing chamber (41).

6. The burner for a gas stove according to claim 5, characterized in that: The partition (30) is an annular partition wall, the partition wall is connected to the straight portion (31) via a first horizontal connecting rod (5d), an inverted L-shaped partition (301) is extended from the top of the partition wall toward the first horizontal connecting rod (5d), the peripheral shielding member (3a) is a vertical shielding plate, the vertical shielding plate is connected to the side wall of the partition wall via a second horizontal connecting rod (5a), the bottom of the partition wall extends downward toward the second horizontal connecting rod (5a), and a horizontal partition (301a) is extended toward the secondary air supply channel (4000).

7. The burner for a gas stove according to claim 6, characterized in that: The outer ring fire cover (2) comprises an annular component (23) and an annular body (24) arranged in the annular component (23); the annular body (24) has a main fire part (22) which is connected to the outer ring gas mixing chamber (21) and can spray mixed gas toward the inner ring fire cover (4).

8. The burner for a gas stove according to claim 7, characterized in that: A transmission member (600) is provided between the annular member (23) and the outer annular gas channel (12) for transmitting the gas in the outer annular gas channel (12) to the annular member (23), the transmission member (600) comprising an inner annular wall (6001), an outer annular wall (6002) arranged concentrically and spaced apart, and a connecting wall (6003) connecting the inner annular wall (6001) and the outer annular wall (6002), the connecting wall (6003) being provided with at least two openings which are independent of the secondary gas supply channel (4000) along the circumferential direction. ), and a vertical outer ring air supply channel (6004) for supplying secondary air to the main fire section (22); the connecting wall (6003) is provided with a vertical connecting portion (6005) connected to the outer ring gas channel (12) and a horizontal connecting portion (6006) located between two adjacent vertical connecting portions (6005) and extending radially outward on the inner side of each vertical outer ring air supply channel (6004); and the secondary air supply channel (4000) radially penetrates the bottom of the connecting wall (6003).

9. The burner for a gas stove according to claim 8, characterized in that: The transmission member (600) is covered with an annular cover plate (700), and the annular cover plate (700) includes a first cover plate portion (7001) corresponding to the outer ring gas channel (12) and a second cover plate portion (7002) corresponding to the horizontal connecting portion (6006), and gaps (7003) are formed between adjacent second cover plate portions (7002) for exposing the vertical outer ring air supply channel (6004), and the peripheral portion of each of the gaps (7003) is hinged with a third cover plate portion (7004) for covering the vertical outer ring air supply channel (6004).

10. The burner for a gas stove according to claim 9, characterized in that: The third cover plate portion (7004) is provided with an actuating member (800) capable of actuating the third cover plate portion (7004) to open or close relative to the vertical outer ring air supply channel (6004); the actuating member (800) can actuate the rotation of the third cover plate portion (7004) when triggered by the downward movement of the peripheral shielding member (3a).

11. The burner for a gas stove according to any one of claims 6 to 10, characterized in that: The tube wall of the central gas channel (11) has a through hole for the first horizontal connecting rod (5d) to pass through, and the head of the driving rod (34) can directly move downward relative to the contraction part (32) when the cookware is placed thereon, thereby driving the contraction part (32) to move downward relative to the fixed seat (111), and finally driving the peripheral shielding member (3a) to move downward relative to the main fire part (22).

12. The burner for a gas stove according to claim 11, characterized in that: The driving rod (34) is a temperature sensor.

13. The burner for a gas stove according to claim 12, characterized in that: An energy gathering cover (900) is provided on the annular component (23) of the outer ring fire cover (2).

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