CN212618300U - 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 and is formed with outer ring gas mixing chamber, has the outer ring fire lid of the main fire portion that is linked together with outer ring gas mixing chamber, its characterized in that: the wall portion of moving part has the gas hole that the gas that supplies in the central gas passageway flowed in, still including setting up the moving part in central passageway and be used for sheltering from the peripheral shielding part of main fire portion, the moving part can directly be triggered under the action that the pan was shelved on it to the realization exposes main fire portion, compares with prior art, the utility model has the advantages of in realizing carrying the pot and closing outer fire, overcome interval periods such as add condiments, sabot in the culinary art process, 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 combustor for gas-cooker that can change interior ring fire size when sitting 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 open the combustor that is used for the gas-cooker of outer ring fire when changing the interior ring fire size when sitting.

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 is arranged in the central gas channel and provided with a cavity for gas in the central gas channel to flow in, the cavity is in fluid communication with the inner ring fire cover, the wall part 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 of the movable piece, the periphery of the driving rod is provided with a shielding part, and the driving rod can move downwards relative to the movable piece under the action that the head part of the driving rod is placed on the driving rod by a pot tool so as to at least partially shield the gas hole of the movable piece, so that the gas inlet area of the gas hole is changed.

In order to meet the cooking requirement of a user, namely, the cooker is provided with an inner ring fire and an outer ring fire which are independent, preferably, the cooker further comprises an outer ring gas channel arranged at the peripheral part of the central channel of the base, and an outer ring fire cover arranged on the outer ring gas channel and formed 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 moving part further comprises a peripheral shielding part used for shielding the main fire part, and the moving part can drive the peripheral shielding part to move downwards under the action of the cooker placed on the moving part, so that the main fire part is exposed.

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 better realize the closing of the outer ring fire by lifting the pot, preferably, the peripheral shielding piece of the moving piece is connected with the straight part through a connecting rod, the connecting rod penetrates out of the pipe wall of the central gas channel, correspondingly, the pipe wall of the central gas channel is provided with a through hole for the connecting rod to penetrate out, the head part of the driving rod can directly move downwards relative to the contraction part under the action of placing the pot thereon, then the contraction part is driven to move downwards relative to the fixed seat, finally the peripheral shielding piece is driven to move downwards relative to the main fire part, and the straight part of the moving piece is provided with a covering part which can always cover the through hole and keep a state close to the through hole.

When being adapted to the pan for sharp pot, avoid the pot end of sharp pot to push down inner ring fire lid easily, 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 has throughout 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 the bottom of the sharp 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 between the bottom of the sharp pot and 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. The annular body can be formed by at least two layers of thin sheet metal sheets and a corrugated fire cover sheet arranged between the thin sheet metal sheets, and the structure of the peripheral shielding piece can be simpler because the outer ring fire cover is of the structure.

In order to adapt to a sharp pot with a more sharp pot bottom, preferably, 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 along 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 perspective of simple structure, preferably, the shielding portion is in a cylindrical shape with openings at the upper and lower sides, and the shielding portion is connected with the driving rod through a connecting strip.

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 that the outer ring fire is closed by lifting the pan, overcome the interval time periods of adding seasonings and loading plates in the cooking process, the stove fire is still continuously burnt, the purposes of saving fuel and saving energy are realized, meanwhile, the central gas channel is provided with the shielding part, the head part of the driving rod can move downwards relative to the moving part under the action of placing the pan on the head part, and then at least partially shield the gas hole of the moving part, thereby changing the air inlet area of the gas hole, namely realizing that when the outer ring fire is opened, the inner ring fire can not be, more favorable for 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 driving rod according to an embodiment of the present invention;

FIG. 10 is a sectional view showing the main fire part of the outer ring fire cover exposed in the embodiment of the present invention (a state of being placed on a pot with a sharp bottom);

fig. 11 is a sectional view showing the main fire part of the outer ring fire cover in the embodiment of the present invention exposed (a state of being placed on a pot with a pointed and pointed bottom).

Detailed Description

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

As shown in FIGS. 1 to 11, the preferred embodiment of the present invention is shown. The burner for the gas stove of the embodiment comprises a base 1, a central gas channel 11 arranged at the central part of the base 1, a tubular structure with an upward opening, an inner ring fire cover 4 arranged above the central gas channel 11 and formed with an inner ring gas mixing chamber, a movable element 3 arranged in the central gas channel 11, a driving rod 34 which can be elastically arranged in the cavity 321 of the movable element 3, a shielding part 340 arranged at the periphery of the driving rod 34 and can move downwards relative to the movable element 3 under the action that the head of the driving rod 34 is placed on a cooker, this in turn at least partially obstructs the gas bore 322 of the moving part 3, so that the gas inlet area of the gas bore 322 is changed. When a cooker is placed on the central gas channel 11, the moving part 3 moves downwards under pressure and drives the peripheral shielding part to move downwards so as to expose the fire outlet part for cooking, when the cooker is lifted to leave the central gas channel 11, the moving part 3 moves upwards again and drives the peripheral shielding part to move upwards so as to realize that the cooker is lifted to close the outer ring fire, thereby overcoming the problem that the cooker fire is still burning continuously at intervals such as seasoning and tray loading in the cooking process, realizing the purposes of saving fuel and saving energy, meanwhile, the shielding part 340 is arranged on the periphery of the driving rod 34, the head part of the driving rod 34 can move downwards relative to the moving part 3 under the action of placing the cooker on the driving rod, and then at least partially shielding the gas hole 322 of the moving part 3, thereby changing the gas inlet area of the gas hole 322, being particularly suitable for the cooking of a sharp-bottomed cooker, namely realizing that the inner ring fire can not be pressed when the outer ring fire is opened, more favorable for full combustion.

Specifically, in order to meet the cooking requirement of a user, namely, the cooker has an inner ring fire and an outer ring fire which are independent, the cooker further comprises an outer ring gas channel 12 arranged at the peripheral part of a central channel of the base 1 and an outer ring fire cover 2 arranged on the outer ring gas channel 12 and formed with an outer ring gas mixing chamber 21, 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. Wherein 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 located 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 better realize the fire shutting when the pot is lifted, 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 thereon, and then the contraction portion 33 is driven to move downwards relative to the fixing seat 111, and finally the peripheral shielding member is 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 close proximity with the through hole. And when in order to adapt to the pan being a sharp pan, avoid the bottom of the pan of sharp pan 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 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, and 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 the trend of exposing in the top of outer tube 5 all the time. 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. In addition, the bottom of the contraction part 33 is provided with a contraction foot 332 which contracts inwards along the radial direction, the contraction foot 332 is sleeved with a second elastic element 8, the tail end of the second elastic element 8 is connected in the central pipeline of the fixed seat 111, and the arrangement of the second elastic element 8 enables the contraction part 33 to always have the tendency of returning to the 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. This ring body 24 can be by at least two-layer thin sheet metal piece and set up the corrugate fire lid piece between this thin sheet metal piece and constitute to because outer loop fire lid 2 is this structure, can make the structure of peripheral shielding piece simpler. Finally, in order to adapt to a sharp pot with a sharper pot bottom, 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 extending inwards in 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. Specifically, the shielding portion 340 is a tube shape with an upper opening and a lower opening, the shielding portion 340 is connected with the driving rod 34 through a connecting strip 3400, meanwhile, the central gas channel 11 is provided with the shielding portion 340, the head of the driving rod 34 can move downwards relative to the moving part 3 under the action of being placed on the head by a pot, and then the gas hole 322 of the moving part 3 is shielded at least partially, so that the gas inlet area of the gas hole 322 is changed, namely when the outer ring fire is opened, the inner ring fire cannot be extinguished, and the full combustion is facilitated.

In conclusion, the burner is suitable for three different pot types in the using process 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 at the periphery of the driving rod 34, 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, the gas hole 322 of the movable part 3 is at least partially shielded, so that 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 periphery of the driving rod 34 is provided with the shielding part 340, the head of the driving rod 34 can move downwards relative to the movable part 3 under the action of placing the pan thereon, so as to at least partially shield the air inlet area of the movable part 3, so as to change the air inlet area of the gas hole 322, and when a user lifts the pan, the driving rod 34 and the contraction, 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 periphery of the driving rod 34 is provided with the shielding part 340 which can move downwards relative to the moving part 3 under the action that the head of the driving rod 34 is placed on 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, but always keeps the distance of the outer sleeve 5 with the inner ring fire cover 4, so as to avoid the, 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) is of 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 gas-fired boiler comprises a movable piece (3) arranged in a central gas channel (11), wherein 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 in fluid communication with an inner ring fire cover (4), 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 gas-fired boiler further comprises a driving rod (34) capable of being elastically arranged in the cavity (321) of the movable piece (3), the periphery of the driving rod (34) is provided with a shielding part (340), and the driving rod can move downwards relative to the movable piece (3) under the action that the head of the driving rod (34) is placed on the driving rod by a cooker so as to at least partially shield the gas hole (322) of the movable piece (3), so that the gas inlet area of the gas hole (322.

2. Burner for gas cooktops according to claim 1, characterized in that: the movable part (3) further comprises a peripheral shielding piece for shielding the main fire part (22), and the movable part (3) can drive the peripheral shielding piece to move downwards under the action of the pot placed on the movable part (3), 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 shrink portion of horn mouth (33) of the internal diameter looks adaptation of central authorities gas passageway, still including the afterbody lies in elastically the actuating lever (34) of shrink portion (33), the head of actuating lever (34) expose in inner ring fire lid (4), and central authorities gas passageway (11) are provided with and supply shrink 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: the inner ring fire cover (4) comprises an inner ring peripheral wall and an inner ring top cover covering the inner ring peripheral wall and can move relative to the central gas channel (11), a groove (112) extending inwards in the radial direction is formed in the inner wall of the central gas channel (11), a third elastic piece (9) is connected to the bottom of the groove (112), the upper end of the third elastic piece (9) is connected to the inner ring fire cover (4), and the third elastic piece (9) enables the inner ring fire cover (4) to always have the tendency of being capable of being restored to be flush with the top opening of the central gas channel (11).

9. Burner for gas cooktops according to claim 8, characterized in that: the shielding part (340) is in a cylindrical shape with an upper opening and a lower opening, and the shielding part (340) is connected with the driving rod (34) through a connecting strip (3400).

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