Combustor and gas stove

Abstract

The present application belongs to the technical field of kitchen appliances, and discloses a burner and a gas stove. The rotating axis of the outer ring fire divider is parallel to and spaced apart from the first central axis along the vertical direction, which can rotate the outer ring fire divider according to the heating requirements of different diameters of pots, so as to adjust the minimum distance between the outer ring fire divider and the central fire divider. When a pot with a smaller diameter is used, the outer ring fire divider is rotated to reduce the minimum distance between the outer ring fire divider and the central fire divider, so as to reduce the heating range of the burner and make full use of the heat energy generated by the operation of the burner. When a pot with a larger diameter is used, the outer ring fire divider is rotated to increase the minimum distance between the outer ring fire divider and the central fire divider, so as to increase the heating range of the burner, so that the bottom of the pot can be heated more uniformly, thereby making the burner not only meet the needs of pots with different diameters and improve the versatility of the gas stove, but also improve the heat energy utilization rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, in particular to a burner and a gas stove. BACKGROUND

[0002] The existing burners of gas stoves generally have fixed sizes and structures. The burners with such structures have fixed flame burning areas when in use, which results in that when the burners are used to heat cooking utensils with different diameters, such as larger-diameter pots, the heat obtained by the area of the pot bottom close to the outside is smaller than that of other areas, so that problems such as uneven heating and local heating of the pot bottom occur. SUMMARY

[0003] One of the technical problems solved by the present application is to provide a burner that can be applied to pots with different diameters and improve the uniformity of heating of the pot bottom of the pot.

[0004] The second technical problem solved by the present application is to provide a gas stove that can improve the versatility of the gas stove.

[0005] The first technical problem is solved by the following technical scheme:

[0006] The burner comprises:

[0007] a base structure having a central gas channel and an outer ring gas channel arranged radially outward of the central gas channel and in communication with the central gas channel;

[0008] a central flame divider mounted on the base structure and in communication with the central gas channel;

[0009] a plurality of outer ring flame dividers, the plurality of outer ring flame dividers being arranged circumferentially and spaced apart around the central flame divider, each outer ring flame divider being rotatably mounted on the top of the base structure about a rotation axis and in communication with the outer ring gas channel;

[0010] The rotation axis of the outer ring flame divider is parallel to and spaced apart from a first central axis extending in the vertical direction of the outer ring flame divider, so that the spacing between the first central axis of the outer ring flame divider and a second central axis extending in the vertical direction of the central flame divider is adjustable.

[0011] The burner of the present application has the following beneficial effects compared with the background art:

[0012] The burner provided by the application, since each outer ring pilot is rotatably mounted on the top of the base structure around a rotation axis, the rotation axis of the outer ring pilot is parallel to and spaced apart from the first central axis along which the outer ring pilot extends vertically, the rotation axis of each outer ring pilot is eccentrically arranged relative to the first central axis of the outer ring pilot, so that when the outer ring pilot rotates around its rotation axis, the minimum distance between the outer ring pilot and the central pilot changes.

[0013] The outer ring pilot can be rotated according to the heating requirements of cookware of different diameters to adjust the minimum distance between the outer ring pilot and the central pilot; when smaller-diameter cookware is used, the outer ring pilot is rotated to reduce the minimum distance between the outer ring pilot and the central pilot, so as to reduce the heating range of the burner and make full use of the heat energy generated by the operation of the burner; when larger-diameter cookware is used, the outer ring pilot is rotated to increase the minimum distance between the outer ring pilot and the central pilot, so as to increase the heating range of the burner, so that the bottom of the cookware can be more uniformly heated, thereby not only enabling the burner to meet the requirements of cookware of different diameters and improving the versatility of the gas stove, but also improving the heat energy utilization rate.

[0014] In one of the embodiments, the outer ring pilot is in a flat strip shape, and for any outer ring pilot, the first central axis and the rotation axis are spaced apart along the length direction of the outer ring pilot.

[0015] In one of the embodiments, the base structure is provided with an outer ring gas channel corresponding to each outer ring pilot, and the outer ring pilot further comprises:

[0016] a pilot body, the pilot body having an outer ring gas chamber and a plurality of outer ring gas holes, the outer ring gas chamber being in communication with the atmosphere through the outer ring gas holes;

[0017] a mounting shaft portion, the mounting shaft portion being rotatably connected to the pilot body around the rotation axis, and the mounting shaft portion being provided with a gas flow channel, and the outer ring gas channel being in communication with the outer ring gas chamber through the gas flow channel.

[0018] In one of the embodiments, the mounting shaft portion is threadedly connected to the base structure, so that the outer ring pilot can rotate relative to the base structure around the rotation axis.

[0019] In one of the embodiments, the base structure is provided with a mounting hole corresponding to the outer ring gas channel, and the burner further comprises a limiting portion corresponding to the mounting hole, and the limiting portion is movably and sealingly connected to the mounting hole in the axial direction of the mounting hole.

[0020] One end of the limiting part extends into the corresponding outer ring air channel and can selectively abut against the outer peripheral wall of the mounting shaft part or be separated from the mounting shaft part.

[0021] In one of the embodiments, the limiting part is threadedly connected to the base structure.

[0022] In one of the embodiments, the outer peripheral wall of the mounting shaft part protrudes a limiting protrusion, the limiting protrusion is located below the limiting part, and when the outer ring igniter is in the upper limit position of upward movement, the limiting part can be pressed downward on the limiting protrusion.

[0023] In one of the embodiments, an external thread is provided on the mounting shaft part and threadedly connected to the base structure, the maximum outer diameter of the limiting protrusion is D1, the outer diameter of the external thread is D2, and D1 < D2.

[0024] In one of the embodiments, a stop cooperation part is provided on the mounting shaft part, a rotation stop part is provided on the base structure, when the outer ring igniter is in the lower limit position of downward movement, the rotation stop part is pressed against the stop cooperation part, and the limiting part is spaced above the limiting protrusion.

[0025] In one of the embodiments, the base structure comprises:

[0026] a central base provided with the central air channel, and the central igniter is mounted on the top of the central base;

[0027] a plurality of outer ring bases corresponding to the plurality of outer ring igniters;

[0028] The outer ring base comprises a base body provided with the outer ring air channel, and a sealing cover plate surrounding the outer periphery of the inlet end of the outer ring air channel; the sealing cover plate is connected to the base body, and the sealing cover plate is sealingly attached to the outer peripheral surface of the central base and mounted on the central base.

[0029] In one of the embodiments, the minimum distance between the rotation axis of the outer ring igniter and the sealing cover plate is W1, the maximum distance between the rotation axis of the outer ring igniter and the edge of the outer ring igniter is W2, and W1 > W2, so that the outer ring igniter can rotate 360° around its own rotation axis.

[0030] The second technical problem is solved by the following technical solution:

[0031] The gas stove comprises the burner provided in any of the above embodiments.

[0032] Compared with the background art, the gas stove provided by the present application has the beneficial effects that:

[0033] The gas stove of the present application can rotate the outer ring fire distributor according to the heating requirements of different diameters of the cookware to adjust the minimum distance between the outer ring fire distributor and the center fire distributor; when a smaller diameter cookware is used, the outer ring fire distributor is rotated to reduce the minimum distance between the outer ring fire distributor and the center fire distributor to reduce the heating range of the burner and fully utilize the heat energy generated by the operation of the burner; when a larger diameter cookware is used, the outer ring fire distributor is rotated to increase the minimum distance between the outer ring fire distributor and the center fire distributor to increase the heating range of the burner, so that the cookware can be heated more uniformly, thereby not only meeting the requirements of different diameters of the cookware and improving the versatility of the gas stove, but also improving the heat energy utilization rate. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a state diagram of the burner in the first state provided by the embodiment of the present application;

[0035] Figure 2 is a state diagram of the burner in the second state provided by the embodiment of the present application;

[0036] Figure 3 is a state diagram of the burner in the third state provided by the embodiment of the present application;

[0037] Figure 4 is a split schematic diagram of the burner provided by the embodiment of the present application;

[0038] Figure 5 is a partial cross-sectional view of the burner in the third state provided by the embodiment of the present application;

[0039] Figure 6 is a structural schematic diagram of the outer ring fire distributor provided by the embodiment of the present application;

[0040] Figure 7 is a structural schematic diagram of the center base provided by the embodiment of the present application;

[0041] Figure 8 is a structural schematic diagram of the outer ring base provided by the embodiment of the present application.

[0042] In the drawings:

[0043] 1, base structure; 11, center base; 111, center gas channel; 112, gas through hole; 113, base body; 114, positioning boss; 12, outer ring base; 121, base body; 1211, outer ring gas channel; 1212, through hole; 1213, rotation stop; 1214, mounting hole; 122, sealing cover plate;

[0044] 2, center fire distributor; 21, center fire hole;

[0045] 3. outer ring distributor; 31, distributor body; 311, outer ring gas chamber; 312, outer ring port;

[0046] 32, mounting shaft part; 321, gas flow channel; 322, limiting protrusion; 323, external thread; 3231, stopper matching part;

[0047] 4. limiting part; 5, fastener;

[0048] 100, rotation axis; 200, first central axis; 300, second central axis. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0050] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only intended to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0051] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0052] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] Embodiments of the present invention provide a burner and a gas stove. The gas stove includes a burner that is adaptable to cookware of different diameters, thereby improving the versatility of the gas stove. A gas stove may include one burner, or it may include two, three, four or more burners, and is not limited thereto.

[0054] like Figure 1 As shown, the burner includes a base structure 1, a central burner 2, and multiple outer ring burners 3. The base structure 1 has a central air passage 111 and an outer ring air passage 1211 located radially outside the central air passage 111 and communicating with the central air passage 111. The central burner 2 is installed on the base structure 1 and communicates with the central air passage 111. The multiple outer ring burners 3 are arranged circumferentially around the central burner 2. Each outer ring burner 3 is rotatably installed on the top of the base structure 1 around a rotation axis 100 and communicates with the outer ring air passage 1211.

[0055] The rotation axis 100 of the outer ring fire distributor 3 is parallel to and spaced apart from the first central axis 200 of the outer ring fire distributor 3 extending vertically, so that the distance between the first central axis 200 of the outer ring fire distributor 3 extending vertically and the second central axis 300 of the central fire distributor 2 extending vertically is adjustable.

[0056] Since each outer ring flame distributor 3 is rotatably mounted on the top of the base structure 1 around a rotation axis 100, and the rotation axis 100 of the outer ring flame distributor 3 is parallel to and spaced apart from the first central axis 200 extending vertically of the outer ring flame distributor 3, the rotation axis 100 of each outer ring flame distributor 3 is eccentrically set relative to the first central axis 200 extending vertically of the outer ring flame distributor 3. This causes the distance between the first central axis 200 extending vertically of the outer ring flame distributor 3 and the second central axis 300 extending vertically of the central flame distributor 2 to change when the outer ring flame distributor 3 rotates circumferentially around its own rotation axis 100.

[0057] The outer ring fire distributor 3 can be rotated according to the heating requirements of cookware of different diameters to adjust the minimum distance between the outer ring fire distributor 3 and the central fire distributor 2; when smaller-diameter cookware is used, the outer ring fire distributor 3 is rotated to reduce the distance between the first central axis 200 extending in the vertical direction of the outer ring fire distributor 3 and the second central axis 300 extending in the vertical direction of the central fire distributor 2, so as to reduce the heating range of the burner and make full use of the heat energy generated by the operation of the burner; when larger-diameter cookware is used, the outer ring fire distributor 3 is rotated to increase the distance between the first central axis 200 extending in the vertical direction of the outer ring fire distributor 3 and the second central axis 300 extending in the vertical direction of the central fire distributor 2, so as to increase the heating range of the burner, so that the bottom of the cookware can be more uniformly heated, thereby realizing that the heat energy generated by the operation of the burner can be fully applied to cookware of different diameters, improving the versatility of the gas stove, and making full use of the entire bottom of the cookware as a heat exchange area to improve the heat energy utilization rate.

[0058] The gas stove provided by the embodiment of the present application comprises the above burner, and by adopting the above burner, the use requirements of cookware of different diameters are met, the versatility, heat energy utilization rate and bottom heating uniformity of the cookware of the gas stove are improved.

[0059] In some embodiments, as shown in FIG. 1, the outer ring fire distributor 3 is in a flat strip shape, and for any outer ring fire distributor 3, the first central axis 200 and the rotation axis 100 are arranged in a spaced manner along the length direction of the outer ring fire distributor 3. Figure 1 Thus, the rotation of the outer ring fire distributor 3 around the rotation axis 100 can be controlled, so that the flames sprayed by the outer ring fire holes 312 of the plurality of outer ring fire distributors 3 are relatively continuous.

[0060] Specifically, the projection of the outer ring fire distributor 3 in the horizontal plane is generally in a waist shape, and the first central axis 200 and the rotation axis 100 are arranged in a spaced manner along a preset direction.

[0061] As an alternative, the projection of the outer ring fire distributor 3 in the horizontal plane can also be in a rectangular shape, and at this time, for any outer ring fire distributor 3, the first central axis 200 and the rotation axis 100 are arranged in a spaced manner along the length direction of the long side of the rectangular shape. The projection of the outer ring fire distributor 3 in the horizontal plane can also be in a circular shape or an elliptical shape or a cam shape, and the first central axis 200 of the outer ring fire distributor 3 is a vertical line passing through the center of the projection, and for any outer ring fire distributor 3, the rotation axis 100 is arranged eccentrically relative to the first central axis 200.

[0062] Specifically, the base structure 1 includes a central base 11 and multiple outer ring bases 12. The central base 11 is provided with a central air passage 111, and the outer ring bases 12 are provided with outer ring air passages 1211. The central flameout 2 is installed on the top of the central base 11. The multiple outer ring bases 12 are arranged in a one-to-one correspondence with the multiple outer ring flameouts 3. The outer ring flameouts 3 are rotatably installed on the top of the corresponding outer ring base 12 around their own rotation axis 100. The outer ring bases 12 extend radially along the central base 11.

[0063] like Figure 1 As shown, the angle between the length direction of the outer ring burner 3 and the extension direction of the outer ring base 12 to which the outer ring burner 3 is connected is 0°. The first central axis 200 of the outer ring burner 3 is closer to the central burner 2 than the rotation axis 100. The flame holes of the outer ring burner 3 are concentrated in the area near the center of the burner. The state of the burner at this time is recorded as the first state. The distance between the first central axis 200 of the outer ring burner 3 extending vertically in the first state and the second central axis 300 of the central burner 2 extending vertically in the first state is recorded as L1. The burner in the first state is suitable for small-diameter cookware and is conducive to concentrating all the heat energy at the bottom of the cookware.

[0064] like Figure 2 As shown, the angle between the length direction of the outer ring burner 3 and the extension direction of the outer ring base 12 corresponding to the outer ring burner 3 is 45°. The first central axis 200 of the outer ring burner 3 is closer to the central burner 2 than the rotation axis 100. The flame holes of the outer ring burner 3 are concentrated in the area near the center of the burner. The state of the burner at this time is recorded as the second state. The distance between the first central axis 200 of the outer ring burner 3 extending vertically in the second state and the second central axis 300 of the central burner 2 extending vertically in the second state is recorded as L2. L2 is greater than L1. The burner in the second state is suitable for small-diameter cookware and is conducive to concentrating all the heat energy at the bottom of the cookware.

[0065] like Figure 3 As shown, the angle between the length direction of the outer ring burner 3 and the extension direction of the outer ring base 12 corresponding to the outer ring burner 3 is 180°. The first central axis 200 of the outer ring burner 3 is closer to the central burner 2 than the rotation axis 100 of the outer ring burner 3. The burner can cover a larger area. The state of the burner at this time is recorded as the third state. The burner in the third state is suitable for large-diameter cookware, which is conducive to covering the entire bottom of the large-diameter cookware with heat and improving the heat uniformity of the bottom of the large-diameter cookware.

[0066] In some embodiments, such as Figure 4 to Figure 8As shown, the outer ring igniter 3 further comprises an igniter body 31 and a mounting shaft portion 32, wherein the igniter body 31 has an outer ring gas chamber 311 and a plurality of outer ring fire holes 312, the outer ring gas chamber 311 is in communication with the outside atmosphere through the outer ring fire holes 312; the mounting shaft portion 32 is rotationally connected to the igniter body 31 around the rotation axis 100, and the mounting shaft portion 32 is provided with a gas flow channel 321, and the outer ring gas channel 1211 is in communication with the outer ring gas chamber 311 through the gas flow channel 321.

[0067] The gas entering the outer ring gas channel 1211 enters the outer ring gas chamber 311 through the gas flow channel 321 on the mounting shaft portion 32, and is then ignited at the outer ring fire hole 312 and sprayed to the outside atmosphere.

[0068] The mounting shaft portion 32 not only has the function of connecting the outer ring gas channel 1211 and the outer ring gas chamber 311 through the gas flow channel 321 thereon, but also can meet the rotation requirement of the outer ring igniter 3 by mounting the mounting shaft portion 32 around the rotation axis 100 to the outer ring base 12, so as to achieve the purposes of reducing the number of components, improving the integration of the burner, and reducing the cost.

[0069] In some embodiments, the mounting shaft portion 32 is threadedly connected to the base structure 1, so that the outer ring igniter 3 can rotate around the rotation axis 100 relative to the base structure 1. Specifically, the mounting shaft portion 32 is threadedly connected to the corresponding outer ring base 12, so that the outer ring igniter 3 can rotate around the rotation axis 100 relative to the corresponding outer ring base 12.

[0070] Threadedly connecting the mounting shaft portion 32 to the corresponding outer ring base 12 not only makes the rotation of the outer ring igniter 3 convenient and fast to realize the adjustable distance between the first central axis 200 extending in the vertical direction of the outer ring igniter 3 and the second central axis 300 extending in the vertical direction of the central igniter 2, but also can simultaneously make the outer ring igniter 3 ascend and descend in the vertical direction, so as to control the distance from the fire hole on the burner to the pot bottom, and when this distance is reduced, the heat energy utilization rate can be improved.

[0071] In addition, threadedly connecting the mounting shaft portion 32 to the corresponding outer ring base 12 can realize the continuous adjustable distance between the first central axis 200 extending in the vertical direction of the outer ring igniter 3 and the second central axis 300 extending in the vertical direction of the central igniter 2, and can meet the use requirements of a plurality of different diameter pots.

[0072] Specifically, as shown in FIG. 1, Figure 4 and Figure 8As shown, the top surface of the outer ring base 12 is provided with a through hole 1212 penetrating to the inner wall of the outer ring air channel 1211, the through hole 1212 is a threaded hole, the outer peripheral wall of the mounting shaft part 32 is provided with an external thread 323, one end of the mounting shaft part 32 is placed in the outer ring air channel 1211 after penetrating through the through hole 1212, and the external thread 323 is threadedly connected with the through hole 1212 to threadedly connect the outer ring base 12 and the mounting shaft part 32.

[0073] Alternatively, the threaded hole can also be arranged on the mounting shaft part 32, and a protrusion is arranged on the top surface of the outer ring base 12, the outer periphery of the protrusion is provided with an external thread 323 threadedly matched with the threaded hole, and the gas flow channel 321 penetrates to the upper surface of the protrusion. When the outer ring pilot 3 does not have the up-down adjustment requirement, the outer ring pilot 3 can be rotationally connected to the corresponding outer ring base 12 through a bearing.

[0074] In some embodiments, as shown in the drawings, Figure 4 to Figure 6 As shown, the base structure 1 is provided with a mounting hole 1214 corresponding to the outer ring air channel 1211, and the burner further comprises a limiting part 4 corresponding to the mounting hole 1214, the limiting part 4 is sealingly connected to the mounting hole 1214 in an axially movable manner along the mounting hole 1214; one end of the limiting part 4 extends into the corresponding outer ring air channel 1211 and can selectively abut against the outer peripheral wall of the mounting shaft part 32 or be separated from the mounting shaft part 32.

[0075] Exemplarily, the limiting part 4 is threadedly connected to the mounting hole 1214, so that the limiting part 4 can move axially.

[0076] After the position of the outer ring pilot 3 is adjusted, the limiting part 4 is screwed to make one end of the limiting part 4 abut against the outer peripheral wall of the mounting shaft part 32, so as to improve the stability of the outer ring pilot 3. When it is necessary to adjust the position of the outer ring pilot 3, the limiting part 4 can be axially moved to be separated from the outer peripheral wall of the mounting shaft part 32, so as to avoid the influence of the limiting part 4 on the rotation of the outer ring pilot 3.

[0077] Alternatively, the limiting part 4 can also be installed on the mounting shaft part 32 in an axially pullable manner along the mounting hole 1214, and a tension spring connected to the limiting part 4 is arranged inside the outer ring air channel 1211, and the tension spring is used to make one end of the limiting part abut against the outer peripheral wall of the mounting shaft part 32. When it is necessary to adjust the up-down position of the outer ring pilot 3, the limiting part 4 can be manually pulled outward to be separated from the outer peripheral wall of the mounting shaft part 32.

[0078] In some embodiments, the outer peripheral wall of the mounting shaft part 32 is provided with a limiting protrusion 322, the limiting protrusion 322 is located below the limiting part 4, and when the outer ring pilot 3 is in the upper limit position of the upward movement, the limiting part 4 can be downwardly pressed against the limiting protrusion 322.

[0079] When the limiting portion 4 presses against the limiting protrusion 322 during the process of the limiting protrusion 322 following the upward movement of the outer ring igniter 3, it indicates that the outer ring igniter 3 has moved to the upper limit position, thereby limiting the lifting stroke of the outer ring igniter 3 during the rotation of the outer ring igniter 3, and preventing the outer ring igniter 3 from separating from the outer ring base 12.

[0080] In some embodiments, as shown in Figure 5 and Figure 6 , the mounting shaft portion 32 is provided with an external thread 323 that is threadedly connected to the outer ring base 12, and the maximum outer diameter of the limiting protrusion 322 is D1, and the outer diameter of the external thread 323 is D2, and D1 < D2.

[0081] In this way, the portion of the mounting shaft portion 32 below the external thread 323 can pass through the through hole 1212 and extend into the outer ring air channel 1211, thereby ensuring that the external thread 323 on the mounting shaft portion 32 can be smoothly threadedly connected to the through hole 1212.

[0082] In some embodiments, as shown in Figure 5 and Figure 6 , the mounting shaft portion 32 is provided with a stop matching portion 3231, and the base structure 1 is provided with a rotation stop portion 1213; when the outer ring igniter 3 is in the lower limit position of the downward movement, the rotation stop portion 1213 presses against the stop matching portion 3231, and the limiting portion 4 is spaced apart above the limiting protrusion 322.

[0083] When the stop matching portion 3231 and the rotation stop portion 1213 press against each other, the outer ring igniter 3 cannot be continuously rotated to continue to descend, which indicates that the user has installed the outer ring igniter 3 in place, and when the limiting portion 4 is installed later, it is ensured that the limiting portion 4 is located above the limiting protrusion 322, thereby facilitating the end of the limiting portion 4 to press against the outer peripheral wall of the mounting shaft portion 32 after extending into the outer ring air channel 1211, so that the limiting portion 4 does not affect the lifting of the mounting shaft portion 32 in the vertical direction during the later position adjustment of the rotation of the outer ring igniter 3.

[0084] Specifically, the rotation stop portion 1213 is provided on the outer ring base 12, the end of the external thread 323 close to the one end of the igniter body 31 forms the stop matching portion 3231, the stop matching portion 3231 is the inner wall of the groove at the end of the external thread 323, the inner wall of the through hole 1212 is provided with an internal thread, and the end of the internal thread close to the one end of the igniter body 31 forms the rotation stop portion 1213, and the rotation stop portion 1213 is a protrusion at the end of the internal thread.

[0085] It should be noted that other ways can also be used to limit the outer ring igniter 3, such as the through hole 1212 being a stepped hole, the stepped surface of the stepped hole facing upward forming a rotation stop 1213, the mounting shaft 32 being a stepped rod structure, the stepped surface of the mounting shaft 32 facing downward forming a stop matching part 3231, when the stop matching part 3231 downwardly abuts against the rotation stop 1213, the mounting shaft 32 cannot continue to move downward, indicating that the outer ring igniter 3 is at the lower limit position of downward movement, and at this time the limiting part 4 can abut against the outer peripheral wall of the mounting shaft 32 in the horizontal direction.

[0086] In some embodiments, the lower end of the gas flow channel 321 extends to the lower end surface of the mounting shaft 32, and when the outer ring igniter 3 is at the lower limit position of downward movement, the lower end surface of the mounting shaft 32 and the inner bottom wall of the outer ring gas channel 1211 are spaced apart to prevent the mounting shaft 32 from moving downward to abut against the inner bottom wall of the outer ring gas channel 1211 and affect the gas in the outer ring gas channel 1211 into the gas flow channel 321.

[0087] Alternatively, a plurality of communication holes can also be provided on the outer peripheral wall of the mounting shaft 32, and the gas flow channel 321 communicates with the outer ring gas channel 1211 through the communication holes.

[0088] In some embodiments, as shown in Figs. Figure 5 and Figure 6 One end of the limiting part 4 extends into the outer ring gas channel 1211, and the limiting part 4 is threadedly connected to the outer ring base 12, so that one end of the limiting part 4 can selectively abut against the outer peripheral wall of the mounting shaft 32 in the horizontal direction or be separated from the outer peripheral wall of the mounting shaft 32. Exemplarily, the limiting part 4 is a screw.

[0089] Specifically, the outer ring base 12 is provided with a mounting hole 1214, the limiting part 4 extends into the outer ring gas channel 1211 through the mounting hole 1214, and the limiting part 4 and the mounting hole 1214 are threadedly connected. By screwing the limiting part 4, one end of the limiting part 4 can selectively abut against the outer peripheral wall of the mounting shaft 32 in the horizontal direction or be separated from the outer peripheral wall of the mounting shaft 32.

[0090] In this way, it is convenient to threadedly connect the mounting shaft 32 of the outer ring igniter 3 to the outer ring base 12 when assembling the burner, and then install the limiting part 4 after rotating the outer ring igniter 3 to the appropriate angle, and then threadedly connect the limiting part 4 to the outer ring base 12 to make one end of the limiting part 4 extend into the outer ring gas channel 1211 and abut against the outer peripheral wall of the mounting shaft 32 in the horizontal direction, so as to realize the fastening of the outer ring igniter 3 and prevent the outer ring igniter 3 from loosening.

[0091] When the burner is repaired, the limiting portion 4 is screwed to make the limiting portion 4 exit the mounting hole 1214, and then the outer ring pilot 3 is screwed to be removed, so that the limiting portion 4 does not affect the disassembly of the outer ring pilot 3.

[0092] The outer ring pilot 3 is convenient to disassemble and maintain, and the structure of the entire burner is simple and low in cost.

[0093] In some embodiments, as shown in Figure 4 , Figure 7 and Figure 8 , one end of the outer ring gas channel 1211 penetrates to the end face of the outer ring base 12 close to one end of the center base 11, the center base 11 is provided with a gas passage hole 112 corresponding to each outer ring gas channel 1211, and the center base 11 is provided with a center gas channel 111.

[0094] The gas is sent into the center gas channel 111, and part of the gas in the center gas channel 111 is distributed to each outer ring gas channel 1211 through each gas passage hole 112, so as to improve the uniformity of the gas distributed to each outer ring gas channel 1211.

[0095] Exemplarily, the outer ring gas channel 1211 is provided with four outer ring gas channels 1211, which are arranged at equal intervals along the circumference of the center base 11, and correspondingly, the outer ring base 12 is provided with four outer ring gas channels 1211, and the center base 11 is provided with four gas passage holes 112, which are arranged at equal intervals along the circumference of the center base 11.

[0096] It should be noted that the number of outer ring gas channels 1211 can also be three, five, six or more, which will not be listed one by one here.

[0097] In some embodiments, as shown in Figure 4 , Figure 7 and Figure 8 , the outer ring base 12 includes a base body 121 with the outer ring gas channel 1211, and a sealing cover plate 122 surrounding the outer periphery of the inlet end of the outer ring gas channel 1211; the sealing cover plate 122 is connected to the base body 121, and the sealing cover plate 122 is sealingly attached to the outer periphery of the center base 11 and mounted on the center base 11.

[0098] Specifically, the two adjacent sealing cover plates 122 abut along the circumference of the center base 11, so that the plurality of sealing cover plates 122 form a sealing sleeve around the mounting ring outside the center base 11. In this way, the aesthetic performance of the burner can be improved.

[0099] In some embodiments, as shown in Figure 3 and Figure 4As shown, the sealing cover plate 122 is installed on the central base 11 by the fastener 5, which is convenient and quick to disassemble and assemble.

[0100] Exemplarily, each sealing cover plate 122 is installed on the central base 11 by two fasteners 5, and the base body 121 is located between the two fasteners 5 along the circumference of the central base 11. It should be noted that the number of fasteners 5 required to install each sealing cover plate 122 on the central base 11 can be two, four, etc., which will not be limited here.

[0101] In some embodiments, as shown in Figure 4 and Figure 5 The upper end of the central gas channel 111 penetrates to the top surface of the central base 11, the lower end of the central pilot 2 is inserted into the central gas channel 111, and the lower end of the central pilot 2 is threadedly connected with the central gas channel 111. The central pilot 2 has a central gas chamber and a plurality of central fire holes 21, the central gas channel 111 communicates with the central gas chamber, and the central gas chamber communicates with the outside atmosphere through the central fire holes 21.

[0102] After the gas is sent into the central gas channel 111, part of the gas enters the central gas chamber and is sprayed after being ignited at the central fire hole 21, and the other part of the gas enters the outer ring gas channel 1211, and then enters the outer ring gas chamber 311 through the gas flow passage and is sprayed after being ignited at the outer ring fire hole 312.

[0103] In some embodiments, as shown in Figure 4 and Figure 7 The central base 11 includes a base body 113, and the top surface of the base body 113 is provided with a positioning boss 114, the upper end of the central gas channel 111 penetrates to the upper surface of the positioning boss 114, and the central pilot 2 has a downward facing limiting surface which is pressed downward on the upper surface of the positioning boss 114.

[0104] During the process of screwing the central pilot 2, when it is not possible to continue to screw the central pilot 2, it indicates that the limiting surface is pressed downward on the upper surface of the positioning boss 114, and the central pilot 2 is installed in place.

[0105] In some embodiments, as shown in Figure 4 and Figure 7 The lower end surface of the central pilot 2 is not lower than the highest point of the second gas through hole 112.

[0106] In this way, the influence of the lower end of the central pilot 2 inserted into the central gas channel 111 on the gas distribution can be reduced, and the uniformity of the gas distribution can be improved.

[0107] In some embodiments, as shown in Figure 1 to Figure 5As shown, the outer ring igniter 3 can rotate 360° about the rotation axis 100, and the lifting stroke of the outer ring igniter 3 can be increased to adjust the height of the outer ring igniter 3 to meet the use requirements of different diameter pots.

[0108] Specifically, the minimum distance between the rotation axis 100 of the outer ring igniter 3 and the sealing cover plate 122 is W1, and the maximum distance between the rotation axis 100 of the outer ring igniter 3 and the edge of the outer ring igniter 3 is W2, W1>W2, in other words, no matter the outer ring igniter 3 is rotated to any position, the outer ring igniter 3 is always spaced apart from the sealing cover plate 122, thereby avoiding the interference of the sealing cover plate 122 on the rotation of the outer ring igniter 3.

[0109] It should be noted that in order to realize the rapid lifting of the outer ring igniter 3, the pitch of the outer thread 323 can be set larger, and in order to accurately control the position of the outer ring igniter 3, the pitch of the outer thread 323 can be set smaller. In order to meet the lifting height requirement of the outer ring igniter 3, the rotation number of the outer ring igniter 3 can be limited, and the outer ring igniter 3 can rotate multiple turns around the rotation axis 100.

[0110] In the specific content of the above specific embodiments, any combination of technical features can be combined without contradiction, and in order to make the description concise, not all possible combinations of the above technical features are described, however, as long as the combination of these technical features does not exist contradiction, it should be considered as the scope of the description.

[0111] The specific content of the above specific embodiments only expresses several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. Burner, characterized in that The burner comprises: a base structure (1) having a central gas passage (111) and an outer ring gas passage (1211) arranged radially outside the central gas passage (111) and in communication with the central gas passage (111); a central distributor (2) mounted on the base structure (1) and in communication with the central gas passage (111); a plurality of outer ring distributors (3) arranged circumferentially and spaced apart around the central distributor (2), each outer ring distributor (3) being rotatably mounted on the top of the base structure (1) around a rotation axis (100) and in communication with the outer ring gas passage (1211); the rotation axes (100) of the outer ring distributors (3) are parallel to and spaced apart from first central axes (200) of the outer ring distributors (3) extending in the vertical direction, so that the spacing between the first central axes (200) of the outer ring distributors (3) and a second central axis (300) of the central distributor (2) extending in the vertical direction is adjustable; the outer ring distributors (3) are flat strip-shaped structures, and for any outer ring distributor (3), the first central axis (200) and the rotation axis (100) are spaced apart along the length direction of the outer ring distributor (3).

2. The burner of claim 1, wherein The outer ring distributor (3) comprises: a distributor body (31) having an outer ring gas chamber (311) and a plurality of outer ring gas holes (312), the outer ring gas chamber (311) being in communication with the atmosphere through the outer ring gas holes (312); a mounting shaft portion (32) rotatably connected to the distributor body (31) around the rotation axis (100), the mounting shaft portion (32) being provided with a gas flow passage (321), and the outer ring gas passage (1211) being in communication with the outer ring gas chamber (311) through the gas flow passage (321).

3. The burner of claim 2, wherein The mounting shaft portion (32) is threadedly connected to the base structure (1), so that the outer ring distributor (3) can rotate relative to the base structure (1) around the rotation axis (100).

4. The burner of claim 3, wherein The base structure (1) is provided with mounting holes (1214) corresponding to the outer ring gas passages (1211), and the burner further comprises limiting portions (4) corresponding one-to-one to the mounting holes (1214), the limiting portions (4) being movably and sealingly connected to the mounting holes (1214) in the axial direction of the mounting holes (1214); one end of the limiting portion (4) extends into the corresponding outer ring gas passage (1211) and can selectively abut against or be separated from the outer peripheral wall of the mounting shaft portion (32).

5. The burner of claim 4, wherein The limiting portion (4) is threadedly connected to the mounting hole (1214).

6. The burner of claim 4, wherein The outer peripheral wall of the mounting shaft part (32) is provided with a limiting protrusion (322), the limiting protrusion (322) is below the limiting part (4), when the outer ring igniter (3) is in the upper limit position of upward movement, the limiting part (4) can be pressed downward on the limiting protrusion (322).

7. The burner of claim 6, wherein The mounting shaft part (32) is provided with an external thread (323) which is screwed with the base structure (1), the maximum outer diameter of the limiting protrusion (322) is D1, the outer diameter of the external thread (323) is D2, D1 < D2.

8. The burner of claim 6, wherein The mounting shaft part (32) is provided with a stop cooperation part (3231), the base structure (1) is provided with a rotation stop part (1213); when the outer ring igniter (3) is in the lower limit position of downward movement, the rotation stop part (1213) is pressed on the stop cooperation part (3231), the limiting part (4) is arranged above the limiting protrusion (322) with a spacing.

9. Burner according to any one of claims 2 to 8, characterized in that The base structure (1) comprises: A center base (11) provided with the center air channel (111), the center igniter (2) is installed on the top of the center base (11); A plurality of outer ring bases (12) are arranged one by one corresponding to the plurality of outer ring igniters (3). The outer ring base (12) comprises a base body (121) provided with the outer ring air channel (1211), and a sealing cover plate (122) surrounding the outer periphery of the inlet end of the outer ring air channel (1211); the sealing cover plate (122) is connected to the base body (121), and the sealing cover plate (122) is sealingly attached to the outer peripheral surface of the center base (11) and is installed on the center base (11).

10. The burner of claim 9, wherein The minimum distance between the rotation axis (100) of the outer ring igniter (3) and the sealing cover plate (122) is W1, the maximum distance between the rotation axis (100) of the outer ring igniter (3) and the edge of the outer ring igniter (3) is W2, W1 > W2, so that the outer ring igniter (3) can rotate 360° around its rotation axis (100).

11. Gas hob, characterized in that The burner comprises the burner according to any one of claims 1 to 10.

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