CN212618299U - Burner for gas stove - Google Patents

Abstract

The utility model relates to a burner for a gas stove, which comprises a base; the central channel is of a cylindrical structure with an upward opening and is arranged at the central part of the base; the outer ring gas channel that sets up the peripheral position at base center channel sets up on outer ring gas channel to be formed with outer inner ring gas mixing chamber, have the outer ring fire lid of the main fire portion that is linked together with outer ring gas mixing chamber, its characterized in that: still including setting up the moving part in central channel and being used for sheltering from the peripheral shielding element of main fire portion, the moving part can directly be triggered under the action that the pan was shelved on it to realize exposing main fire portion, be provided with the shielding part in the pipe wall of central gas passageway, compare with prior art, the utility model has the advantages of realize carrying the pot and close outer ring fire, overcome at interval periods such as culinary art in-process addition condiment, sabot, the stove fire is still burnt constantly, has realized fuel saving, energy-conserving purpose.

Description

Burner for gas stove

Technical Field

The utility model relates to a gas-cooker field, concretely relates to carry a pot and close combustor for gas-cooker of fire.

Background

Present big desk-top stir-fry kitchen, middling pressure fry kitchen, often need open earlier gas, reuse ignition rod or burning torch ignite, open air supply system at last, just can normally burn, work such as fry, the operation is very inconvenient to during the interval of adding condiments, sabot and repeated operation, the stove fire is still burning constantly, and oil gas fuel's waste is very big, and air supply system also does not stop work, causes the waste of electricity. Therefore, a Chinese utility model patent with the patent number ZL200420034149.3 (with the publication number CN2731307Y) 'full-automatic energy-saving stove' discloses a full-automatic energy-saving stove which comprises a stove body, and is characterized by also comprising a control rod and a follow-up skewer, wherein the follow-up skewer is arranged in the stove body and can move up and down along with the placement and lifting of the stove body on a pot; the lower end of the follow-up skewer is movably connected with the control rod in a mode that the lower end of the follow-up skewer is connected with one end of the control rod, the other end of the follow-up skewer is fixed on the stove body in a rotatable mode, when the pot is placed on the stove, the follow-up skewer is pressed to move downwards, so that the moving end of the control rod moves downwards, the fuel control switch, the ignition control switch and the air blower control switch are switched on, the supply of oil gas fuel is switched on, the air blower is ignited, and the full-automatic energy-saving stove starts to work. When the pan is lifted, the follow-up skewer moves upwards, the moving end of the control rod moves upwards, and the fuel control switch, the ignition control switch and the blower control switch are switched off, so that the full-automatic energy-saving stove stops working, and the pan is placed, ignited and lifted to be closed. The switch and the ignition control switch are controlled by the up-and-down movement of the follower skewer, but the requirement for the circuit part is high by the control in this way.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem that provides a can change the combustor that is used for the gas-cooker of inner ring fire size when carrying the pot to above-mentioned prior art current situation.

The utility model aims to solve the second technical problem that to above-mentioned prior art current situation and provide a can also close the combustor that is used for the gas-cooker of outer ring fire when carrying the pot and change the interior ring fire size.

The utility model provides a technical scheme that above-mentioned first technical problem adopted does: this a combustor for gas-cooker, the combustor includes:

a base;

the central gas channel is of a cylindrical structure with an upward opening and is arranged at the central part of the base;

the inner ring fire cover is arranged on the central gas channel and is provided with an inner ring gas mixing chamber;

the method is characterized in that:

the movable piece can move up and down in the vertical direction relative to the central gas channel, the movable piece is provided with a cavity 321 for gas in the central gas channel to flow in, the cavity 321 is in fluid communication with the inner ring fire cover, the wall of the movable piece is provided with at least one gas hole for gas in the central gas channel to flow in, the movable piece further comprises a driving rod which can be elastically arranged in the cavity 321 of the movable piece, a shielding part is arranged in the pipe wall of the central gas channel, the movable piece can move downwards relative to the movable piece under the action that the head of the driving rod is placed on the driving rod by a pot tool, and then the movable piece is driven to move downwards relative to the central gas channel, so that the shielding part can at least partially shield the gas hole of the movable piece, and the air inlet.

The movable part comprises a base, a central channel and a movable part, wherein the base is provided with an outer ring gas channel arranged at the periphery of the central channel of the base, the outer ring fire cover is arranged on the outer ring gas channel and is provided with an outer ring gas mixing chamber, the outer ring fire cover is provided with a main fire part communicated with the outer ring gas mixing chamber, the movable part also comprises a peripheral shielding piece used for shielding the main fire part, and the movable part can drive the peripheral shielding piece to move downwards under the action of placing the movable part on the base, so that the exposure of the main fire part is realized. When the pan was placed on central channel, the moving part received pressure downstream, drove peripheral shielding piece downstream simultaneously to expose out the fire portion in order to cook, when the pan was mentioned and leaves central channel, the moving part upwards moved again, drove peripheral shielding piece upward movement simultaneously, realized carrying the pot and close outer ring fire, overcome and added condiments in the culinary art process, the interval period such as sabot, the stove fire is still burnt constantly, has realized fuel saving, energy-conserving purpose.

Further, the moving part is divided into three parts from bottom to top according to the change of the cross section: with straight portion, the portion of narrowing and the bellmouth constriction portion up of central authorities ' gas passageway's internal diameter looks adaptation, the afterbody of actuating lever is located elastically the constriction portion, the head of actuating lever expose in the inner ring fire lid, and central authorities ' gas passageway is provided with and supplies the fixing base of constriction portion relative its removal. If the pan is a pan, when the pan is placed at the head of the driving rod, the pan can drive the contraction part to move downwards relative to the fixing seat, so that the peripheral shielding part is driven to move downwards, the main fire part can be exposed, when a user lifts the pan, the driving rod and the contraction part can both return to the initial state, the peripheral shielding part moves upwards, and the main fire part is shielded.

In order to avoid air leakage of the central gas passage, preferably, the peripheral shielding member of the moving member is connected with the straight portion through a connecting rod, the connecting rod penetrates through the pipe wall of the central gas passage, correspondingly, the pipe wall of the central gas passage is provided with a through hole for the connecting rod to penetrate through, the head of the driving rod can directly move downwards relative to the contraction portion under the action of the pot placed on the driving rod, then the contraction portion is driven to move downwards relative to the fixed seat, finally the peripheral shielding member is driven to move downwards relative to the main fire portion, and the straight portion of the moving member is provided with a covering portion which can always cover the through hole and is in close proximity to the through hole.

When being adapted to the pan and being sharp pot, avoid the bottom of a boiler of sharp pot to push down inner ring fire lid, preferably, the periphery of actuating lever is provided with the outer tube, the central authorities of shrink portion have the confession the spacing groove of outer tube relative movement, the outer tube with the integrative setting of inner ring fire lid, the bottom of spacing groove is provided with first supporting rod, the upper end of first supporting rod with be connected with first elastic component between the lower extreme of actuating lever, the outer tube cover is established the periphery of first supporting rod, and in have the interval between the bottom of spacing groove, the setting of first elastic component can make the head of actuating lever have all the time expose in the trend at the top of outer tube. The outer sleeve can support the bottom of a sharp pot, the phenomenon that the distance between the bottom of the sharp pot and the inner ring fire cover is too close is avoided, when a pot is placed at the head of the driving rod, the head of the driving rod can retract into the outer sleeve, and meanwhile, the contraction part can be driven to move downwards relative to the fixing seat, so that the peripheral shielding part is driven to move downwards, the main fire part can be exposed, the bottom of the sharp pot always keeps the distance of the outer sleeve with the inner ring fire cover, the inner ring fire cover is pressed at the bottom of the sharp pot, when a user lifts the pot, the driving rod and the contraction part can both return to the initial state, the peripheral shielding part moves upwards, and the main fire part is shielded.

Furthermore, the bottom of the contraction part is provided with a contraction foot which contracts inwards along the radial direction, a second elastic piece is sleeved on the contraction foot, the tail end of the second elastic piece is connected into the central pipeline of the fixed seat, and the arrangement of the second elastic piece enables the contraction part to always have the tendency of returning to the original position.

Furthermore, the outer ring fire cover comprises a ring-shaped part and a ring-shaped body arranged in the ring-shaped part, and the ring-shaped body is provided with a main fire part which is communicated with the outer ring gas mixing chamber and can spray mixed gas towards the inner ring fire cover.

Further, the inner ring fire cover can move relative to the central gas channel, the inner wall of the central gas channel is provided with a groove extending inwards in the radial direction, the bottom of the groove is connected with a third elastic piece, the upper end of the third elastic piece is connected with the inner ring fire cover, and the third elastic piece enables the inner ring fire cover to always have the tendency of being capable of returning to be flush with the top opening of the central gas channel. When a pot is placed at the head of the driving rod, the head of the driving rod can retract into the outer sleeve and drive the outer sleeve, the inner ring fire cover and the contraction part to move downwards relative to the fixing seat, so that the peripheral shielding piece is driven to move downwards, the main fire part can be exposed, the distance of the outer sleeve is kept between the pot bottom of the sharp pot and the inner ring fire cover, the inner ring fire cover is pressed by the pot bottom of the sharp pot, the distance of the outer sleeve is kept between the pot bottom of the sharp pot and the inner ring fire cover even though the inner ring fire cover moves downwards relative to the central gas channel, the distance of the outer sleeve is kept between the pot bottom of the sharp pot and the inner ring fire cover, the inner ring fire cover is prevented from being pressed by the pot bottom of the sharp pot, and when a user lifts the pot.

From the viewpoint of simple structure, it is preferable that the shielding portion is an annular partition plate provided on an inner wall of the central gas passage.

Compared with the prior art, the utility model has the advantages of when the pan was placed on central channel, the moving part received pressure downstream, drive peripheral shielding part downstream simultaneously, thereby expose out the fire portion in order to cook, when the pan was mentioned and is left central channel, the moving part rebound again, drive peripheral shielding part rebound simultaneously, realize carrying the pot and close outer fire, overcome and add condiments in the culinary art process, interval periods such as sabot, the stove fire is still burnt constantly, fuel saving has been realized, energy-conserving purpose.

Compared with the prior art, the utility model has the advantages that when the pan is placed on the central gas channel, the moving part is pressed to move downwards, and simultaneously drives the peripheral shielding part to move downwards, thereby exposing the fire outlet part for cooking, when the pan is lifted to leave the central gas channel, the moving part moves upwards again, and simultaneously drives the peripheral shielding part to move upwards, so as to realize the purpose that the outer fire is closed by lifting the pan, thereby overcoming the interval time periods of adding seasonings and installing a pan in the cooking process, the furnace fire is still continuously burnt, thereby realizing the purposes of saving fuel and saving energy, simultaneously, the shielding part is arranged in the pipe wall of the central gas channel, the head part of the driving rod can move downwards relative to the moving part under the action of placing the pan on the driving rod, and then at least partially shielding the gas hole of the moving part, thereby changing the gas inlet area of the gas hole, and being especially suitable for the cooking of a sharp-bottomed, the inner ring fire can not be pressed, which is more beneficial to the full combustion.

Drawings

FIG. 1 is a schematic structural diagram of a burner according to an embodiment of the present invention;

FIG. 2 is an angled cross-sectional view of FIG. 1;

FIG. 3 is yet another angular cross-sectional view of FIG. 1;

FIG. 4 is another angular cross-sectional view of FIG. 1;

fig. 5 is a schematic structural view of the movable member in the embodiment of the present invention (the driving rod is omitted);

FIG. 6 is a cross-sectional view of FIG. 5;

fig. 7 is a schematic structural view of a movable member according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view of FIG. 7;

FIG. 9 is a schematic structural view of a baffle portion in the inner ring gas channel of the burner according to an embodiment of the present invention;

fig. 10 is a cross-sectional view of fig. 9 (burner in seated position).

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 10, which are the best embodiments of the present invention, the burner for a gas stove in this embodiment includes a base 1, the central gas channel 11 is a cylindrical structure with an upward opening, the central gas channel 11 is disposed at a central portion of the base 1, an inner ring fire cover 4 disposed on the central gas channel 11 and formed with an inner ring gas mixing chamber, a movable member 3 capable of moving up and down in a vertical direction relative to the central gas channel 11, the movable member 3 has a cavity 321321 for gas in the central gas channel 11 to flow into, the cavity 321321 is in fluid communication with the inner ring fire cover 4, a wall portion of the movable member 3 has at least one hole 322 for gas in the central gas channel 11 to flow into, and further includes a driving rod 34 capable of being elastically disposed in the cavity 321321 of the movable member 3, a shielding portion 340 is disposed in a pipe wall of the central gas channel 11, the head of the driving rod 34 can move downwards relative to the moving part 3 under the action of the pan placed on the driving rod, and then the moving part 3 is driven to move downwards relative to the central gas channel 11, so that the shielding part 340 can at least partially shield the gas hole 322 of the moving part 3, and the gas inlet area of the gas hole 322 is changed, when the pan is placed on the central gas channel 11, the moving part 3 is pressed to move downwards, and simultaneously the peripheral shielding part is driven to move downwards, so that the fire outlet part is exposed for cooking, when the pan is lifted to leave the central gas channel 11, the moving part 3 moves upwards again, and simultaneously the peripheral shielding part is driven to move upwards, so that the outer ring fire is closed by lifting the pan, the problems that the furnace fire is still burnt continuously during the interval time periods of seasoning adding and plate loading in the cooking process are solved, the purposes of saving fuel and saving energy are realized, and meanwhile, the shielding part 340 is, the head of the driving rod 34 can move downwards relative to the moving part 3 under the action of being placed on the cooker, and then at least partially covers the gas hole 322 of the moving part 3, so that the gas inlet area of the gas hole 322 is changed, the cooker is particularly suitable for cooking of a pot with a sharp bottom, namely when the outer ring fire is opened, the inner ring fire cannot be pressed, and the cooker is more favorable for full combustion.

The cooker comprises a base 1, an outer ring gas channel 12 arranged at the peripheral part of a central channel of the base 1, an outer ring fire cover 2 arranged on the outer ring gas channel 12 and formed with an outer ring gas mixing chamber 21, wherein the outer ring fire cover 2 is provided with a main fire part 22 communicated with the outer ring gas mixing chamber 21, a moving part 3 also comprises a peripheral shielding piece for shielding the main fire part 22, the moving part 3 can drive the peripheral shielding piece to move downwards under the action of placing a cooker on the moving part, so that the main fire part 22 is exposed, when the cooker is placed on the central channel, the moving part 3 moves downwards under pressure and simultaneously drives the peripheral shielding piece to move downwards, so that the fire outlet part is exposed for cooking, when the cooker is lifted out of the central channel, the moving part 3 moves upwards again, and simultaneously drives the peripheral shielding piece to move upwards, so that the outer ring fire is closed by lifting the cooker, and the problem of adding seasonings and seasoning in the cooking process is solved, The furnace fire is still burning continuously when the furnace is loaded at equal intervals, thus realizing the purposes of saving fuel and energy. Further, the moving part 3 is divided into three parts from bottom to top according to the change of the cross section: the straight portion 31, the narrowed portion 32 and the contraction portion 33 with the upward bell mouth are matched with the inner diameter of the central gas channel 11, the tail portion of the driving rod 34 is elastically positioned at the contraction portion 33, the head portion of the driving rod 34 is exposed out of the inner ring fire cover 4, the central gas channel 11 is provided with a fixing seat 111 which can enable the contraction portion 33 to move relative to the central gas channel, if the pot is a flat pot, when the pot is placed at the head portion of the driving rod 34, the contraction portion 33 can be driven to move downwards relative to the fixing seat 111, so that the peripheral shielding piece is driven to move downwards, the main fire portion 22 can be exposed, and when a user lifts the pot, the driving rod 34 and the contraction portion 33 can return to the initial state, and the peripheral shielding piece moves upwards, so that the main fire portion 22 is shielded. In order to avoid air leakage of the central gas passage 11, the peripheral shielding member of the moving member 3 is connected with the straight portion 31 through the connecting rod 5d, the connecting rod 5d penetrates through the pipe wall of the central gas passage 11, correspondingly, the pipe wall of the central gas passage 11 is provided with a through hole 110 for the connecting rod 5d to penetrate through, the head of the driving rod 34 can directly move downwards relative to the contraction portion 33 under the action of the pot placed on the connecting rod, the contraction portion 33 is further driven to move downwards relative to the fixing seat 111, the peripheral shielding member is finally driven to move downwards relative to the main fire portion 22, and the straight portion 31 of the moving member 3 is provided with a covering portion 311 which can always cover the through hole 110 and keep a state.

And when in order to adapt to the pan for sharp pot, avoid the bottom of a boiler of sharp pot to push down inner ring fire lid 4, the periphery of actuating lever 34 is provided with outer tube 5, the central authorities of constriction part 33 have the spacing groove 331 that supplies outer tube 5 relative movement, outer tube 5 sets up with inner ring fire lid 4 an organic whole, the bottom of spacing groove 331 is provided with first supporting rod 6, be connected with first elastic component 7 between the upper end of first supporting rod 6 and the lower extreme of actuating lever 34, outer tube 5 cover is established in the periphery of first supporting rod 6 to have the interval between the bottom of spacing groove 331, the setting of first elastic component 7 can make the head of actuating lever 34 have all the time expose in the trend at the top of outer tube 5. The outer sleeve 5 can support the bottom of the sharp cooker to avoid the too close distance between the bottom of the sharp cooker and the inner ring fire cover 4, when the cooker is placed at the head of the driving rod 34, the head of the driving rod 34 can retract into the outer sleeve 5, and simultaneously the contraction part 33 can be driven to move downwards relative to the fixing seat 111, so that the peripheral shielding part is driven to move downwards, the main fire part 22 can be exposed, the bottom of the sharp cooker always keeps the distance of the outer sleeve 5 with the inner ring fire cover 4, the bottom of the sharp cooker presses the inner ring fire cover 4, and when a user lifts the cooker, the driving rod 34 and the contraction part 33 can both return to the initial state, the peripheral shielding part moves upwards, and the main fire part 22 is shielded. The bottom of the contracting portion 33 has a contracting leg 332 retracting inward along the radial direction, the contracting leg 332 is sleeved with a second elastic member 8, the tail end of the second elastic member 8 is connected in the central pipeline of the fixing seat 111, and the arrangement of the second elastic member 8 enables the contracting portion 33 to always have a tendency of returning to an original position. The outer ring fire cover 2 of the present embodiment includes an annular member 23 and an annular body 24 provided in the annular member 23, and the annular body 24 has a main fire portion 22 communicating with the outer ring gas mixing chamber 21 and capable of ejecting a gas mixture toward the inner ring fire cover 4. Because the inner ring fire cover 4 can move relative to the central gas channel 11, the inner wall of the central gas channel 11 is provided with a groove 112 which extends inwards along the radial direction, the bottom of the groove 112 is connected with a third elastic part 9, the upper end of the third elastic part 9 is connected with the inner ring fire cover 4, and the third elastic part 9 ensures that the inner ring fire cover 4 always has the tendency of being capable of returning to be flush with the top opening of the central gas channel 11. When a pot is placed at the head of the driving rod 34, the head of the driving rod 34 can retract into the outer sleeve 5 and drive the outer sleeve 5, the inner fire cover 4 and the contraction part 33 to move downwards relative to the fixing seat 111, so that the peripheral shielding piece is driven to move downwards and the main fire part 22 can be exposed, but the bottom of the sharp pot and the inner fire cover 4 always keep the distance of the outer sleeve 5, the bottom of the sharp pot presses the inner fire cover 4, although the inner fire cover 4 moves downwards relative to the central gas channel 11, the bottom of the sharp pot and the inner fire cover 4 always keep the distance of the outer sleeve 5, the phenomenon that the bottom of the sharp pot presses the inner fire cover 4 is avoided, and when a user lifts the pot, the driving rod 34 and the contraction part 33 can both return to the initial state, the peripheral shielding piece moves upwards, so that the main fire part 22 is shielded. Finally, from the viewpoint of simple structure, it is preferable that the shielding portion 340 is an annular partition plate provided on the inner wall of the central gas passage 11.

In summary, the burner is adapted to three different pot types during use to generate the following three conditions:

a. a pan: when the pan is placed at the head of the driving rod 34, the contraction part 33 can be driven to move downwards relative to the fixed seat 111, so that the peripheral shielding piece is driven to move downwards, the main fire part 22 can be exposed, meanwhile, the shielding part 340 is arranged in the pipe wall of the central gas channel 11, the head of the driving rod 34 can move downwards relative to the movable part 3 under the action of placing the pan on the head of the driving rod, so that the gas hole 322 of the movable part 3 is at least partially shielded, the gas inlet area of the gas hole 322 is changed, when a user lifts the pan, the driving rod 34 and the contraction part 33 can both return to the initial state, and the peripheral shielding piece moves upwards, so that the main fire part 22 is shielded;

b. pot with sharp bottom: because the outer sleeve 5 can support the bottom of the sharp pan to avoid the bottom of the sharp pan from being too close to the inner ring fire cover 4, when the sharp-bottom pan is placed at the head of the driving rod 34, the head of the driving rod 34 can retract into the outer sleeve 5 and simultaneously can drive the contraction part 33 to move downwards relative to the fixed seat 111, so as to drive the peripheral shielding piece to move downwards, so as to expose the main fire part 22, but the bottom of the sharp pan always keeps the distance of the outer sleeve 5 with the inner ring fire cover 4, the bottom of the sharp pan presses the inner ring fire cover 4, meanwhile, the shielding part 340 is arranged in the pipe wall of the central gas channel 11, the head of the driving rod 34 can move downwards relative to the movable part 3 under the action of placing the pan on the head of the driving rod 34, so as to at least partially shield the gas holes 322 of the movable part, so as to change the gas inlet area of the gas holes 322, and when the pan is lifted by a user, the peripheral shield moves upwardly thereby shielding the primary fire 22.

c. Pot with sharp bottom: when the sharp-tipped-bottom pot is placed at the head of the driving rod 34, the head of the driving rod 34 can retract into the outer sleeve 5 and drive the outer sleeve 5, the inner ring fire cover 4 and the contraction part 33 to move downwards relative to the fixing seat 111, so as to drive the peripheral shielding piece to move downwards and expose the main fire part 22, meanwhile, the shielding part 340 is arranged in the pipe wall of the central gas channel 11 and can move downwards relative to the moving part 3 under the action that the head of the driving rod 34 is placed on the driving rod by the pot, so as to at least partially shield the gas hole 322 of the moving part 3, so as to change the gas inlet area of the gas hole 322, but the pot bottom of the sharp-tipped-bottom pot always keeps the distance of the outer sleeve 5 with the inner ring fire cover 4, although the top cover 4d of the inner ring fire cover 4 moves downwards relative to the central gas channel 11, the pot bottom of the sharp-tipped-bottom pot always keeps the distance of the outer sleeve, when the user lifts the pot, the driving rod 34 and the contraction part 33 can both return to the initial state, and the peripheral shielding piece moves upwards, so that the main fire part 22 is shielded, and finally the purpose of closing the outer fire when the pot is lifted is achieved.

Claims (9)

1. A burner for a gas range, said burner comprising:

a base (1);

the central gas channel (11), the central gas channel (11) is a cylindrical structure with an upward opening, and is arranged at the central part of the base (1);

the inner ring fire cover (4) is arranged on the central gas channel (11) and is provided with an inner ring gas mixing chamber;

the method is characterized in that:

the movable piece (3) can move up and down in the vertical direction relative to the central gas channel (11), the movable piece (3) is provided with a cavity (321) for gas in the central gas channel (11) to flow into, the cavity (321) is communicated with the inner ring fire cover (4) in a fluid manner, the wall of the movable piece (3) is provided with at least one gas hole (322) for gas in the central gas channel (11) to flow into, the movable piece further comprises a driving rod (34) which can be elastically arranged in the cavity (321) of the movable piece (3), a shielding part (340) is arranged in the pipe wall of the central gas channel (11), the shielding part (340) can move down relative to the movable piece (3) under the action that the head of the driving rod (34) is placed on the movable piece by a pot, the movable piece (3) is driven to move down relative to the central gas channel (11), and accordingly the shielding part (340) can at least partially shield the gas hole (322) of, thereby changing the air intake area of the gas hole (322).

2. Burner for gas cooktops according to claim 1, characterized in that: the cooker comprises a base (1), and is characterized by further comprising an outer ring gas channel (12) arranged on the periphery of a central channel of the base (1), an outer ring fire cover (2) arranged on the outer ring gas channel (12) and formed with an outer ring gas mixing chamber (21), wherein the outer ring fire cover (2) is provided with a main fire part (22) communicated with the outer ring gas mixing chamber (21), the moving part (3) further comprises a peripheral shielding part used for shielding the main fire part (22), and the moving part (3) can drive the peripheral shielding part to move downwards under the action of placing a cooker on the moving part, so that the main fire part (22) is exposed.

3. Burner for gas cooktops according to claim 2, characterized in that: the moving part (3) is divided into three parts from bottom to top according to the change of the cross section: with straight portion (31), the portion of narrowing (32) and the ascending constriction portion of horn mouth (33) of the internal diameter looks adaptation of central gas passageway (11), the afterbody elasticity of actuating lever (34) is located constriction portion (33), the head of actuating lever (34) expose in inner ring fire lid (4), and central gas passageway (11) are provided with and supply constriction portion (33) are fixing base (111) rather than the removal.

4. Burner for gas cooktops according to claim 3, characterized in that: the peripheral shielding piece of the moving piece (3) is connected with the straight portion (31) through a connecting rod (5d), the connecting rod (5d) penetrates through the pipe wall of the central gas channel (11), correspondingly, the pipe wall of the central gas channel (11) is provided with a through hole (110) for the connecting rod (5d) to penetrate through, the head of the driving rod (34) can directly move downwards relative to the contraction portion (33) under the action of placing a pot thereon, then the contraction portion (33) is driven to move downwards relative to the fixed seat (111), finally the peripheral shielding piece is driven to move downwards relative to the main fire portion (22), and the straight portion (31) of the moving piece (3) is provided with a covering portion (311) which can always cover the through hole (110) and is kept in a state of being close to the through hole (110).

5. Burner for gas cooktops according to claim 4, characterized in that: the periphery of actuating lever (34) is provided with outer tube (5), the central authorities of shrink portion (33) have the confession outer tube (5) relative movement's spacing groove (331), outer tube (5) with interior ring fire lid (4) an organic whole sets up, the bottom of spacing groove (331) is provided with first supporting rod (6), the upper end of first supporting rod (6) with be connected with first elastic component (7) between the lower extreme of actuating lever (34), outer tube (5) cover is established the periphery of first supporting rod (6), and in have the interval between the bottom of spacing groove (331), the setting up of first elastic component (7) can make the head of actuating lever (34) have all the time expose in the trend at the top of outer tube (5).

6. Burner for gas cooktops according to claim 5, characterized in that: the bottom of the contraction part (33) is provided with a contraction foot (332) which contracts inwards in the radial direction, a second elastic piece (8) is sleeved on the contraction foot (332), the tail end of the second elastic piece (8) is connected into the central pipeline of the fixed seat (111), and the arrangement of the second elastic piece (8) enables the contraction part (33) to have the tendency of returning to the original position all the time.

7. The burner for a gas range according to any one of claims 2 to 6, wherein: the outer ring fire cover (2) comprises an annular part (23) and an annular body (24) arranged in the annular part (23), and the annular body (24) is provided with a main fire part (22) which is communicated with the outer ring gas mixing chamber (21) and can spray mixed gas towards the inner ring fire cover (4).

8. Burner for gas cooktops according to claim 7, characterized in that: inner ring fire lid (4) can be relative central gas passageway (11) remove, the inner wall of central gas passageway (11) has along radial inside recess (112) that extend, the bottom of recess (112) is connected with third elastic component (9), the upper end of third elastic component (9) is connected inner ring fire lid (4), third elastic component (9) make inner ring fire lid (4) have all the time can reply to with the trend that the top opening of central gas passageway (11) flushes mutually.

9. Burner for gas cooktops according to claim 8, characterized in that: the shielding part (340) is an annular partition plate arranged on the inner wall of the central gas channel (11).

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