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, the central gas channel is a cylindrical structure with an opening facing upward, and is arranged at the center of the base; an outer ring gas channel is arranged at the peripheral part of the central gas channel of the base, is arranged above the outer ring gas channel, and forms an outer ring gas mixing chamber, and has an outer ring fire cover of a main fire part connected with the outer ring gas mixing chamber, characterized in that: it also includes a movable part, the movable part can move downward when a pot is placed thereon, so as to expose the main fire part, and when the movable part moves downward, a first air outlet and a second air outlet can be separated. Compared with the prior art, the advantage of the present invention is that the outer ring fire can be turned off by lifting the pot, and the problem that the stove fire is still burning during the intervals of adding seasonings and plating during the cooking process is overcome, thereby achieving the purpose of saving fuel and energy.

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 invention 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 such a way 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 in view of the above-mentioned existing technical status, which can effectively avoid the inner and outer rings from influencing each other when sucking in secondary air when the cooker is in a sitting state.

[0005] The second technical problem to be solved by the present invention is to provide a burner for a gas stove which can easily realize the closing of the outer ring fire by lifting the pot in view of 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 better replenish secondary air to the outer ring when the cooker is in a sitting state, 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 is arranged on the central gas passage and forms an inner ring gas mixing chamber, and has a fire outlet portion connected to the inner ring gas mixing chamber;

[0012] An outer ring gas channel is arranged at the outer periphery of the central gas channel of the base;

[0013] An outer ring fire cover is arranged on the outer ring gas channel and forms an outer ring gas mixing chamber, and has a main fire part connected with the outer ring gas mixing chamber;

[0014] It is characterized by: it also includes:

[0015] A transmission member, which is located between the outer ring gas channel and the outer ring fire cover and is used to transmit the gas in the outer ring gas channel to the outer ring fire cover, the transmission member includes a vertical outer ring transmission channel for transmitting gas to the main fire part, at least two secondary air supply channels connected to the outside arranged at intervals along the circumferential direction, and an annular cavity connected to the secondary air supply channels, and the transmission member is provided with a first air outlet connecting the annular cavity and the main fire part and a second air outlet located in a lower row of the first air outlet and connected to the fire outlet on the inner side wall forming the annular cavity at intervals along the circumferential direction; and

[0016] The movable part is arranged in the central gas channel, and includes an outer shielding part for shielding the main fire part. In a natural state, the outer shielding part of the movable part can shield the main fire part, and the movable part can move downward when the cookware is placed thereon, thereby exposing the main fire part, and the first air outlet and the second air outlet can be separated when the movable part moves downward.

[0017] To solve the second technical problem, preferably, the movable part is divided into three parts from bottom to top according to the change of the cross section: a straight part, a narrowing part and a contraction part with the bell mouth facing upwards that match the inner diameter of the central gas channel, and also includes a driving rod whose tail is elastically located at the contraction part, the head of the driving rod is exposed to the inner ring fire cover, and the central gas channel is provided with a fixed seat for the contraction part to move relative to it. When the pot is placed on the state of the driving rod head, it can drive the contraction part to move downward relative to the fixed seat, thereby driving the outer shielding part to move downward, so as to expose the main fire part, and when the user lifts the pot, the driving rod and the contraction part can both return to the initial state, and the outer shielding part moves upward, thereby covering the main fire part.

[0018] Furthermore, the movable part also includes a vertical partition extending out of the central gas channel and a horizontal partition extending toward the annular cavity. The vertical partition is connected to the outer shielding part through a connecting part. When the movable part moves downward, the horizontal partition abuts against the first air outlet, thereby enabling the vertical partition to separate the first air outlet from the second air outlet.

[0019] Furthermore, the connecting member is a connecting rod or an annular connecting plate.

[0020] To solve the third technical problem, preferably, the annular connecting plate is gradually inclined toward the peripheral shielding member from bottom to top. The inclined setting of the annular connecting plate can guide the secondary air flowing into the first air outlet to the main fire part more quickly to promote full combustion of the main fire part.

[0021] Preferably, partition blocks are provided between the annular connecting plate and the vertical partition portion at intervals along the circumferential direction, and the partition blocks allow a gap to exist between the annular connecting plate and the vertical partition portion for secondary air from the periphery of the central gas channel to enter.

[0022] Furthermore, the straight portion is connected to the vertical partition portion by a horizontal connecting rod, and the tube wall of the central gas channel has a through hole for the horizontal connecting rod to pass through. The head of the driving rod can directly move downward relative to the contraction portion when the cookware is placed thereon, and then drive the contraction portion to move downward relative to the fixed seat, and finally drive the outer shielding part to move downward relative to the main fire part. The movable part has a cavity for the gas in the central gas channel to flow into, and the cavity is fluidically connected with the inner ring fire cover, and the wall of the movable part has at least one gas hole for the gas in the central gas channel to flow into, and the straight portion limits the gas to flow into the inner ring fire cover only from the gas hole.

[0023] 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 at the bottom of the limiting groove. The setting of the first elastic member enables the head of the driving rod to always have a tendency to be exposed at the top of the outer sleeve. The outer sleeve can support 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 at the same time 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, but 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 shielding the main fire part.

[0024] 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.

[0025] In order to better realize the closing of the outer ring fire after lifting the pot, 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 which is connected with 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, and because the outer ring fire cover has such a structure, the structure of the peripheral shielding member can be made simpler.

[0026] To solve the fourth technical problem, preferably, an energy collecting cover is provided on the annular component of the outer ring fire cover, which can better collect the combustion heat generated during the combustion of the burner to better heat the bottom of the pot.

[0027] Furthermore, the inner ring fire cover includes an inner ring circumferential wall and an inner ring top cover arranged on the inner ring circumferential wall, the inner ring top cover is a mesh top cover, and the inner ring top cover can move relative to the central gas channel, the inner wall of the central gas channel has a groove extending radially inward, the bottom of the groove is connected to a third elastic member, the upper end of the third elastic member is connected to the inner ring fire cover, and the third elastic member enables the inner ring fire cover to always have a tendency to return to be flush with the top opening of the central gas channel. When the overly pointed pot is placed on the head of the driving rod, the head of the driving rod can be retracted into the outer sleeve, and drive the outer sleeve, the inner ring top cover of the inner ring fire cover and the shrinkage part to move downward relative to the fixed seat, thereby driving the outer shielding part to move downward, thereby exposing the main fire part, but the bottom of the overly pointed pot always maintains a distance of the outer sleeve from the inner ring fire cover, and the bottom of the overly pointed pot presses the inner ring fire cover. Although the inner ring fire cover moves downward relative to the central gas channel, the bottom of the overly pointed pot always maintains a distance of the outer sleeve from the inner ring fire cover, thereby preventing the bottom of the overly pointed pot from pressing the inner ring fire cover. When the user lifts the pot, the driving rod and the shrinkage part can return to their initial state, and the outer shielding part moves upward, thereby covering the main fire part.

[0028] In order to realize the anti-dry burning function, preferably, the driving rod is a temperature sensor.

[0029] Compared with the prior art, the advantage of the present invention is that when the cooker is placed on the central gas passage, the movable part moves downward under pressure, and at the same time drives the outer shielding part to move downward, thereby exposing the fire outlet for cooking; when the cooker is lifted up and leaves the central gas passage, the movable part moves upward again, and at the same time drives the outer shielding part to move upward, thereby realizing the closing of the outer ring fire by lifting the pot, overcoming the problem that the fire is still burning during the intervals of adding seasonings and serving dishes during the cooking process, thereby achieving the purpose of saving fuel and energy; and the movable part can form two independent air outlets in the process of moving downward, thereby effectively preventing the hot air flow after combustion and the high temperature of the burner from producing mutual suction effect on the secondary air supplied to the main fire outlet and the fire outlet, thereby effectively improving the air supply effect, thereby making the flame of the burner short, uniform and powerful, and without defects such as yellow flame and flashback. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of the burner in Example 1 of the present invention;

[0031] Figure 2 for Figure 1 A cross-sectional view at an angle;

[0032] Figure 3 It is a cross-sectional view of the burner in the pot-sitting state in Example 1 of the present invention (the peripheral shielding member is in a downwardly moved state so as to expose the main fire part of the outer ring fire cover and the first air outlet is in a state of maximum opening);

[0033] Figure 4 It is a cross-sectional view of the burner in the embodiment 1 of the present invention in a non-pot-sitting state (the peripheral shielding member is in an upward state so as to shield the main fire part of the outer ring fire cover and the second air outlet is in a state of maximum opening);

[0034] Figure 5 It is a structural schematic diagram of the movable part in Embodiment 1 of the present invention;

[0035] Figure 6 for Figure 5 A cross-sectional view of

[0036] Figure 7 It is a schematic diagram of the structure of the transmission component in Example 1 of the present invention;

[0037] Figure 8 for Figure 7 sectional view of . DETAILED DESCRIPTION

[0038] The present invention is further described in detail below with reference to the accompanying drawings.

[0039] like Figures 1 to 8As shown, it is the best embodiment of the present invention. The burner for a 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, an inner ring fire cover 4 arranged on the central gas channel 11 and forming an inner ring gas mixing chamber 41, the inner ring fire cover 4 has a fire outlet 42 connected to the inner ring gas mixing chamber 41; and an outer ring gas channel 12 arranged in the peripheral part of the central gas channel 11 of the base 1, wherein an outer ring fire cover 2 is arranged 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 the outer ring fire cover 2 has a main fire part 22 connected to the outer ring gas mixing chamber 21; and also includes a transmission member 600, the transmission member 600 is located between the outer ring gas channel 12 and the outer ring fire cover 2, and is used to transmit the gas in the outer ring gas channel 12 to the outer ring fire cover 2, the transmission member 60 The transmission member 600 includes a vertical outer ring transmission channel 6004 for transmitting gas to the main fire part 22, at least two secondary gas supplement channels 400 arranged at intervals along the circumferential direction and connected to the outside, and an annular cavity connected to the secondary gas supplement channel 400. The transmission member 600 is provided with a first gas outlet 6011 connecting the annular cavity 601 and the main fire part 22 and a second gas outlet 6011 located below the first gas outlet 6011 and connected to the fire part 42 at intervals along the circumferential direction on the inner side wall of the annular cavity 601. The air outlet 6012; and a movable part 3, which is arranged in the central gas channel 11, and includes an outer shielding part 3a for shielding the main fire part 22. In a natural state, the outer shielding part 3a of the movable part 3 can shield the main fire part 22, and the movable part 3 can move downward when the cookware is placed thereon, thereby exposing the main fire part 22, and, in the state where the movable part 3 moves downward, the first air outlet 6011 and the second air outlet 6012 can be separated. When the pot is placed on the inner ring fire cover 4, the movable part 3 moves downward under pressure, and at the same time drives the outer shielding part 3a to move downward, thereby exposing the fire outlet 42 for cooking; when the pot is lifted up and leaves the inner ring fire cover 4, the movable part 3 moves upward again, and at the same time drives the outer shielding part 3a to move upward, so as to realize the closing of the outer ring fire by lifting the pot, thereby overcoming the problem that the fire is still burning during the intervals of adding seasonings and serving dishes during the cooking process, thus achieving the purpose of saving fuel and energy; and the separating effect of the movable part 3 in the process of moving downward can form two independent air supply channels, which effectively avoids the mutual suction effect of the hot air flow after combustion and the high temperature of the burner on the secondary air supplied to the main fire part 22 and the fire outlet 42, and effectively improves the air supply effect, so that the flame of the burner is short, uniform and powerful, and there will be no defects such as yellow flame and flashback.

[0040] Specifically, the movable part 3 is divided into three 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, a narrowing part 32, and a contraction part 33 with the bell mouth facing upwards, and also includes a driving rod 34 whose tail is elastically located in the contraction part 33, the head of the driving rod 34 is exposed to the inner ring fire cover 4, and the central gas channel 11 is provided with a fixing seat 111 for the contraction part 33 to move relative to it. When the pot is placed on the head of the driving rod 34, it can drive the contraction part 33 to move downward relative to the fixing seat 111, thereby driving the outer shielding part 3a to move downward, so that the main fire part 22 can be exposed, and when the user lifts the pot, the driving rod 34 and the contraction part 33 can both return to the initial state, and the outer shielding part 3a moves upward, thereby shielding the main fire part 22. In order to realize that the movable part 3 also has the function of guiding the separated secondary air to the main fire part 22 more quickly, the movable part also includes a vertical partition 30 extending out of the central gas channel 11 and a horizontal partition 30' extending to the annular cavity. The vertical partition 30 is connected to the peripheral shielding member 3a through an annular connecting plate 302. When the movable part 3 is in the moving state, the horizontal partition 30' abuts against the first air outlet 6011, so that the vertical partition 30 can separate the first air outlet 6011 from the second air outlet 6012. This embodiment takes the annular connecting plate 302 as an example, wherein the inclined setting of the annular connecting plate 302 can guide the separated secondary air to the main fire part 22 more quickly, so as to promote the full combustion of the main fire part 22. Preferably, a partition block 303 is arranged at intervals along the circumferential direction between the annular connecting plate 302 and the vertical partition 30, and the partition block 303 allows a gap between the annular connecting plate 302 and the partition wall for the secondary air outside the central gas channel 11 to enter. The straight portion 31 is connected to the vertical partition portion 30 through a horizontal connecting rod 5d. The tube wall of the central gas channel 11 has a through hole 110 for the horizontal connecting rod 5d to pass through. The head of the driving rod 34 can directly move downward relative to the contraction portion 33 when the cookware is placed thereon, and then drive the contraction portion 33 to move downward relative to the fixed seat 111, and finally drive the outer shielding member 3a to move downward relative to the main fire portion 22. The movable part 3 has a cavity 321 for the gas in the central gas channel 11 to flow into, and the cavity 321 is fluidically connected with the inner ring fire cover 4, and the wall of the movable part 3 has at least one gas hole 322 for the gas in the central gas channel 11 to flow into, and the straight portion 31 limits the gas to flow into the inner ring fire cover 4 only from the gas hole 322.An outer sleeve 5 is arranged on the periphery of the driving rod 34, and a limiting groove 331 is arranged in the center of the contraction part 33 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 arrangement 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, and 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 33 to move downward relative to the fixed seat 111, thereby driving the outer shielding member 3a to move downward, so that the main fire part 22 can be exposed, but the bottom of the pointed pot always maintains a distance from the inner ring fire cover 4 by the outer sleeve 5, and the bottom of the pointed pot presses the inner ring fire cover 4, and when the user lifts the pot, the driving rod 34 and the contraction part 33 can both return to the initial state, and the outer shielding member 3a moves upward, thereby covering the main fire part 22. In addition, the bottom of the contraction part 33 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 33 always have a tendency to return to the original position. In order to better realize the closing of the outer ring fire after lifting the pot, the outer ring fire cover 2 includes 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 connected to the outer ring gas mixing chamber 21 and capable of spraying mixed gas toward the inner ring fire cover 4, and 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. The annular component 23 of the outer ring fire cover 2 is also provided with an energy gathering cover, which can better gather the combustion heat generated during the combustion of the burner to better heat the bottom of the pot. The inner ring fire cover 4 can also move relative to the central gas channel 11, and the inner wall of the central gas channel 11 has a groove 112 extending radially inward, and the bottom of the groove 112 is connected to the third elastic member 9, and the upper end of the third elastic member 9 is connected to the inner ring fire cover 4, and the third elastic member 9 makes the inner ring fire cover 4 always have a tendency to return to be flush with the top opening of the central gas channel 11. 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 33 to move downward relative to the fixed seat 111, thereby driving the outer shielding part 3a to move downward, thereby exposing the main fire part 22, but the bottom of the pointed pot always maintains a distance from the inner ring fire cover 4 by the outer sleeve 5, and the bottom of the pointed pot presses the inner ring fire cover 4, and when the user lifts the pot, the driving rod 34 and the contraction part 33 can both return to their initial state, and the outer shielding part 3a moves upward, thereby covering the main fire part 22.In addition, the bottom of the contraction portion 33 has a contraction foot 332 that contracts inward 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 makes the contraction portion 33 always have a tendency to return to the original position. The outer ring fire cover 2 of this embodiment includes 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 that is connected to the outer ring gas 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, and because the outer ring fire cover 2 has this structure, the structure of the peripheral shielding member 3a can be simpler. Finally, in order to better adapt to pointed pots with sharper bottoms, the inner ring fire cover 4 includes an inner ring circumferential wall 4c and an inner ring top cover 4d covering the inner ring circumferential wall 4c. The inner ring circumferential wall 4c is arranged on the central gas channel 11 and has at least two fire outlets 41c along the circumferential direction, and the inner ring top cover 4d can move relative to the central gas channel 11. The inner wall of the central gas channel 11 has a groove 112 extending radially inward, and the bottom of the groove 112 is connected to the third elastic member 9. The upper end of the third elastic member 9 is connected to the inner ring top cover 4d of the inner ring fire cover 4. The third elastic member 9 makes the inner ring top cover 4d of the inner ring fire cover 4 always have a tendency to return to be flush with the top opening of the central gas channel 11. 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 drive the outer sleeve 5, the inner ring top cover 4d of the inner ring fire cover 4 and the contraction part 33 to move downward relative to the fixed seat 111, thereby driving the outer shielding member 3a to move downward, so that the main fire part 22 can be exposed, but the bottom of the pointed pot always maintains a distance of the outer sleeve 5 from the inner ring top cover 4d 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. Although the inner ring fire cover 4 moves downward relative to the central gas channel 11, the bottom of the pointed pot always maintains a distance of the outer sleeve 5 from the inner ring top cover 4d of the inner ring fire cover 4. The elastic coefficient of the second elastic member 8 is much smaller than the elastic coefficient of the first elastic member 7, ensuring that the main fire part 22 of the outer ring fire cover 2 is opened first after the pot is placed on it. In this example, the maximum deformation of the second elastic member 8 is the total height of the main fire part 22 of the outer ring fire cover 2. When the movement of the driving rod 34 is greater than the main fire part 22 of the outer ring fire cover 2, the first elastic member 7 is used for buffering. The maximum deformation of the first elastic member 7 is the height of the driving rod 34 above the outer sleeve 5 plus the deformation of the third elastic member 9. The three spring movements of the first elastic member 7, the second elastic member 8 and the third elastic member 9 are in the following order: the second elastic member 8 is first compressed to the extreme position (the pan is placed in a state), then the first elastic member 7 is compressed (the pointed pot is placed in a state), and finally, the first elastic member 7, the second elastic member 8 and the third elastic member 9 are compressed together (the pointed bottom pot is placed in a state); the height of the outer sleeve 5 is preferably 7-14mm, and the driving rod 34 is higher than the highest surface of the pot support by >10mm.An energy collecting cover 700 is arranged on the annular part 23 of the outer ring fire cover 2. The energy collecting cover 700 can better collect the combustion heat generated during the combustion process of the burner to better heat the bottom of the pot.

[0041] In summary, the burner adapts to three different pot types during use and produces the following three situations:

[0042] a. Frying pan: When the frying pan is placed on the head of the driving rod 34, the contraction portion 33 can be driven to move downward relative to the fixing seat 111, thereby driving the outer shielding member 3a to move downward, so that the main fire portion 22 can be exposed, and the second elastic member 8 is compressed;

[0043] 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 33 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 inner ring top cover 4d 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 33 can both return to their initial state, and the outer shielding member 3a moves upward, thereby shielding the main fire part 22.

[0044] 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 33 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, which can move downward relative to the movable part 3 when the head of the driving rod 34 is placed on it by the pot, thereby at least partially shielding the movable part 3. The gas hole 322 is formed, thereby changing the air intake area of ​​the gas hole 322, but the bottom of the pot with a pointed bottom always maintains a distance of the outer sleeve 5 from the inner ring top cover 4d of the inner ring fire cover 4. Although the inner ring top cover 4d of the inner ring fire cover 4 moves downward relative to the central gas channel 11, the bottom of the pot with a pointed bottom 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 avoid the bottom of the pot with a pointed bottom pressing 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 33 can both return to the initial state, and the outer shielding part 3a moves upward, thereby shielding the main fire part 22, and finally achieving the purpose of lifting the pot to close the outer ring fire. In addition, the shielding part 340 arranged on the periphery of the driving rod 34 is arranged on the outer sleeve 5. Since the bottoms of flat pans and pointed bottom pans 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 inner ring top cover 4d of the inner ring fire cover 4 to avoid fire suppression; and when the 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 part 33 to move downward relative to the fixed seat 111, so it drives. 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 the gas does not leak when the main fire part 22 of the outer ring fire cover 2 is blocked.

[0045] Regardless of the type of pan, whether it is a flat bottom pan, a pointed bottom pan or an over-pointed bottom pan, when placed on the head of the driving rod 34, it can drive the peripheral shielding member 3a downward to open the main fire part 22. At this time, the horizontal partition 30' of the movable member 3 abuts against the lower part of the first air outlet 6011, so that the vertical partition 30 can separate the first air outlet 6011 from the second air outlet 6012. Since the main fire part 22 is in an open state, the first air outlet 6011 is also in a state of maximum opening, so that the secondary air flowing in from the secondary air supply channel 400 can be directly supplemented to the main fire part 22 of the outer ring fire cover 2 through the first air outlet 6011 (see Figure 3As shown, the hollow arrow indicates the supplementary path for secondary air to be supplemented to the main fire section 22, and the dotted arrow indicates the supplementary path for secondary air to be supplemented to the fire outlet section 42), and through the partitioning effect of the vertical partition 30 of the movable part, the secondary air flowing in from the secondary air supply channel 400 can be directly supplemented to the fire outlet section 42 of the inner ring fire cover 4 through the second air outlet 6012.

[0046] Example 2

[0047] The structure is basically the same as that of the first embodiment, with the only difference being that the vertical partition 30 is connected to the peripheral shielding member 3a via a connecting rod.

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) is arranged on the central gas channel (11) and forms an inner ring gas mixing chamber (41), and has a fire outlet (42) connected to the inner ring gas mixing chamber (41); 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); Features: Also included are: A transmission member (600), the transmission member (600) being located between the outer ring gas channel (12) and the outer ring fire cover (2) and being used for transmitting the gas in the outer ring gas channel (12) to the outer ring fire cover (2), the transmission member (600) comprising a vertical outer ring transmission channel (6004) for transmitting the gas to the main fire section (22), at least two secondary gas supply channels (400) arranged at intervals along the circumferential direction and communicating with the outside, and an annular cavity (601) communicating with the secondary gas supply channel (400), the transmission member (600) being provided with a first gas outlet (6011) communicating with the annular cavity (601) and communicating with the main fire section (22) and a second gas outlet (6012) located below the first gas outlet (6011) and communicating with the fire outlet section (42) at intervals along the circumferential direction on the inner side wall forming the annular cavity (601); and The movable part (3) is arranged in the central gas channel (11), and includes an outer shielding part (3a) for shielding the main fire part (22). In a natural state, the outer shielding part (3a) of the movable part (3) can shield the main fire part (22), and the movable part (3) can move downward when the cookware is placed thereon, thereby exposing the main fire part (22), and when the movable part (3) moves downward, the first air outlet (6011) and the second air outlet (6012) can be separated.

2. The burner for a gas stove according to claim 1, characterized in that: The movable part (3) is divided into three 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), a narrowed part (32) and a contraction part (33) with a bell mouth facing upward, and also includes a driving rod (34) whose tail is elastically located in the contraction part (33), the head of the driving rod (34) is exposed outside the inner ring fire cover (4), and the central gas channel (11) is provided with a fixed seat (111) capable of allowing the contraction part (33) to move relative to it.

3. The burner for a gas stove according to claim 2, characterized in that: The movable part also includes a vertical partition (30) extending out of the central gas channel (11) and a horizontal partition (30′) extending toward the annular cavity. The vertical partition (30) is connected to the peripheral shielding member (3a) via a connecting member. When the movable part (3) moves downward, the horizontal partition abuts against the first air outlet (6011), thereby enabling the vertical partition (30) to separate the first air outlet (6011) from the second air outlet (6012).

4. The burner for a gas stove according to claim 3, characterized in that: The connecting piece is a connecting rod or an annular connecting plate.

5. The burner for a gas stove according to claim 4, characterized in that: The annular connecting plate gradually inclines from bottom to top toward the peripheral shielding member (3a).

6. The burner for a gas stove according to claim 5, characterized in that: A partition block (303) is arranged between the annular connecting plate (302) and the vertical partition portion (30) at intervals in the circumferential direction, and the partition block (303) allows a gap to be provided between the annular connecting plate (302) and the vertical partition portion (30) for secondary air from the periphery of the central gas channel (11) to enter.

7. The burner for a gas stove according to any one of claims 2 to 6, characterized in that: The straight portion (31) is connected to the vertical partition portion (30) via a connecting rod (5d); the tube wall of the central gas channel (11) has a through hole (110) for the connecting rod (5d) to pass through; the head of the driving rod (34) can directly move downward relative to the contraction portion (33) when the cookware is placed thereon, thereby driving the contraction portion (33) to move downward relative to the fixed seat (111), and finally driving the outer shielding member (3a) to move downward relative to the main fire portion (22); the movable member (3) has a cavity (321) for the gas in the central gas channel (11) to flow in; the cavity (321) is fluidically connected to the inner ring fire cover (4), and the wall of the movable member (3) has at least one gas hole (322) for the gas in the central gas channel (11) to flow in; the straight portion (31) limits the gas to flow into the inner ring fire cover (4) only from the gas hole (322).

8. The burner for a gas stove according to claim 7, 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 portion (33) 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) enables the head of the driving rod (34) to always have a tendency to be exposed at the top of the outer sleeve (5).

9. The burner for a gas stove according to claim 8, characterized in that: The bottom of the contraction portion (33) 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 (33) to always have a tendency to return to its original position.

10. The burner for a gas stove according to claim 9, 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).

11. The burner for a gas stove according to claim 10, characterized in that: An energy gathering cover (700) is provided on the annular component (23) of the outer ring fire cover (2).

12. The burner for a gas stove according to claim 11, characterized in that: The inner ring fire cover (4) comprises an inner ring circumferential wall (4c) and an inner ring top cover (4d) arranged on the inner ring circumferential wall (4c); the inner ring top cover (4d) is a mesh top cover, and the inner ring top cover (4d) can move relative to the central gas channel (11); the inner wall of the central gas channel (11) has a groove (112) extending radially inward; the bottom of the groove (112) is connected to a third elastic member (9); the upper end of the third elastic member (9) is connected to the inner ring fire cover (4); the third elastic member (9) enables the inner ring fire cover (4) to always have a tendency to return to be flush with the top opening of the central gas channel (11).

13. The burner for a gas stove according to any one of claims 8 to 12, characterized in that: The driving rod (34) is a temperature sensor.

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