A gas stove

Abstract

This invention discloses a gas stove, including a gas distribution plate and a burner. The bottom end face of the third outer ring sidewall of the gas distribution plate is connected to the outer periphery of an annular inclined surface, which slopes downwards towards the central axis of the gas distribution plate. The inner periphery of the annular inclined surface abuts against the top face of the fourth outer ring sidewall of the burner. A downwardly protruding annular stop is provided around the inner periphery of the annular inclined surface. Several circumferentially arranged heat-insulating protrusions are formed on the inner periphery of the annular stop, which abut against the outer periphery of the fourth outer ring sidewall of the burner. The gas stove of this invention, through the design of the annular stop and heat-insulating protrusions, improves the connection reliability between the gas distribution plate and the burner, preventing lateral wobbling, and reduces the contact area between the gas distribution plate and the burner, thus reducing the heat transferred from the gas distribution plate to the burner, avoiding heat waste, and using as much heat as possible to heat the bottom of the pot, thereby improving the thermal efficiency of the stove.

Description

Technical Field

[0001] This invention relates to the field of stove technology, and more particularly to a gas stove. Background Technology

[0002] When a gas stove is working, the gas emitted from the inner burner and the gas emitted from the outer burner burner burn together to generate a large amount of heat, which is then supplied to the cookware to heat it.

[0003] However, during the operation of a gas stove, some of the heat generated by the inner and outer burner caps is transferred to the burner head, resulting in a significant heat loss and thus a low thermal efficiency of the gas stove. Summary of the Invention

[0004] This invention provides a gas stove that solves the problem of low thermal efficiency in existing gas stoves.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] A gas stove, comprising:

[0007] The burner head includes a fourth outer ring sidewall, a fourth inner ring sidewall, and a fourth central ring wall. The fourth outer ring sidewall and the fourth inner ring sidewall form a fourth outer ring channel, and the fourth inner ring sidewall and the fourth central ring wall form a fourth inner ring channel.

[0008] The air distribution plate includes a third outer ring sidewall, a third inner ring sidewall, and a third central ring wall. The third outer ring sidewall and the third inner ring sidewall form a third outer ring channel, and the third inner ring sidewall and the third central ring wall form a third inner ring channel.

[0009] The third outer ring channel of the gas distribution plate is connected to the fourth outer ring channel of the burner head, and the third inner ring channel of the gas distribution plate is connected to the fourth inner ring channel of the burner head.

[0010] The bottom end face of the third outer ring sidewall of the gas distribution plate is connected to the outer periphery of an annular inclined surface, which slopes downward toward the central axis of the gas distribution plate; the inner periphery of the annular inclined surface abuts against the top end face of the fourth outer ring sidewall of the burner head.

[0011] A downwardly protruding annular stop is provided around the inner circumference of the annular inclined surface; a plurality of circumferentially arranged heat-insulating protrusions are formed on the inner circumferential surface of the annular stop, and the heat-insulating protrusions abut against the outer circumferential surface of the fourth outer ring sidewall of the furnace head.

[0012] Furthermore, the surface of the annular stop is coated with a heat-insulating coating, and the surface of the heat-insulating protrusion is coated with a heat-insulating coating.

[0013] Furthermore, the surface of the annular inclined surface is coated with a heat-insulating coating.

[0014] Furthermore, the top surfaces of the third outer ring sidewall, the third inner ring sidewall, and the third central ring wall of the air distribution plate are respectively coated with a heat-insulating coating; the bottom surfaces of the third outer ring sidewall, the third inner ring sidewall, and the third central ring wall of the air distribution plate are respectively coated with a heat-insulating coating.

[0015] Furthermore, the top surfaces of the fourth outer ring sidewall, the fourth inner ring sidewall, and the fourth central ring wall of the furnace head are respectively coated with a heat-insulating coating.

[0016] Furthermore, the outer burner cap of the gas stove includes a second outer ring sidewall, a second inner ring sidewall, and a second annular top wall; the second outer ring sidewall, the second inner ring sidewall, and the second annular top wall form a second outer ring cavity; the inner burner cap of the gas stove includes a first outer ring sidewall, a first central ring wall, and a first annular top wall; the first outer ring sidewall, the first central ring wall, and the first annular top wall form a first inner ring cavity; a gas distribution grille is provided on the inner side of the second inner ring sidewall of the outer burner cap, the gas distribution grille including a concentrically arranged outer ring portion, an inner ring portion, and a plurality of grille strips connecting the outer ring portion and the inner ring portion. The bottom surface of the second outer ring sidewall of the outer flame cap abuts against the top surface of the third outer ring sidewall of the gas distributor; the bottom surface of the outer ring portion abuts against the top surface of the third inner ring sidewall of the gas distributor; the bottom surface of the inner ring portion abuts against the top surface of the third central ring wall of the gas distributor; the top surface of the outer ring portion abuts against the bottom surface of the first outer ring sidewall of the inner flame cap; the top surface of the inner ring portion abuts against the bottom surface of the first central ring wall of the inner flame cap; the third outer ring channel of the gas distributor communicates with the second outer ring cavity of the outer flame cap; the third inner ring channel of the gas distributor communicates with the first inner ring cavity of the inner flame cap.

[0017] Furthermore, a heat-insulating coating is applied to the surface of the gas distribution grille, a heat-insulating coating is applied to the bottom end face of the second outer ring sidewall of the outer flame cap, and a heat-insulating coating is applied to the bottom end face of the first outer ring sidewall and the first central ring wall of the inner flame cap.

[0018] Furthermore, a plurality of secondary air upper channels are formed on the inner side of the second inner ring sidewall of the outer flame cap, and the plurality of secondary air upper channels are arranged circumferentially and at intervals around the first inner ring cavity of the inner flame cap; a plurality of secondary air lower channels are arranged at intervals around the third inner ring channel of the air distribution plate; the bottom end faces of the plurality of secondary air upper channels and the top end faces of the plurality of secondary air lower channels abut against each other, and the plurality of secondary air upper channels and the plurality of secondary air lower channels are correspondingly connected; a heat-insulating coating is respectively applied to the bottom end face of the secondary air upper channel and the top end face of the secondary air lower channel.

[0019] Furthermore, the heat insulation coating is made of silica aerosol, quartz plate, glass fiber, or graphene.

[0020] Furthermore, if the material of the heat insulation coating is silica aerosol, the thickness of the heat insulation coating is 0.01mm to 0.5mm; if the material of the heat insulation coating is quartz plate, glass fiber or graphene, the thickness of the heat insulation coating is 0.3mm to 2mm.

[0021] Compared with the prior art, the advantages and positive effects of the present invention are as follows: The gas stove of the present invention, by designing an annular inclined surface on the gas distribution plate, increases the gap between the gas distribution plate and the burner head, allowing users to easily wipe the liquid collection tray and the position of the liquid collection tray fixing screws, reducing cleaning dead corners; by designing an annular stop and heat insulation protrusion, it not only improves the connection reliability between the gas distribution plate and the burner head, preventing left and right shaking, but also reduces the contact area between the gas distribution plate and the burner head, reducing the heat transferred from the gas distribution plate to the burner head, avoiding heat waste, and using as much heat as possible to heat the bottom of the pot, thus improving the thermal efficiency of the stove.

[0022] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of one embodiment of the gas stove proposed in this invention;

[0025] Figure 2 yes Figure 1 Exploded view;

[0026] Figure 3 yes Figure 1 A schematic diagram showing the connection between the inner burner cap, outer burner cap, gas distribution plate, and burner head;

[0027] Figure 4 yes Figure 3 Cross-sectional view;

[0028] Figure 5 yes Figure 2 A schematic diagram of the structure of one embodiment of the inner flame cover;

[0029] Figure 6 yes Figure 5 Cross-sectional view;

[0030] Figure 7 yes Figure 5 Another structural diagram from a different angle;

[0031] Figure 8 yes Figure 2 Cross-sectional view of Chinese and foreign fire caps;

[0032] Figure 9 yes Figure 8 Another structural diagram from a different angle;

[0033] Figure 10 yes Figure 2 A schematic diagram of the structure of one embodiment of the Chinese and foreign fire caps;

[0034] Figure 11 yes Figure 2 A schematic diagram of one embodiment of the central air distribution plate;

[0035] Figure 12 yes Figure 11 Cross-sectional view;

[0036] Figure 13 yes Figure 12 Another structural diagram from a different angle;

[0037] Figure 14 yes Figure 2 A schematic diagram of one embodiment of the central burner.

[0038] Figure label:

[0039] 1. Ejector; 1-1. Outer ring contraction tube; 1-2. Inner ring contraction tube;

[0040] 2. Furnace head; 2-1. Outer ring inlet; 2-2. Inner ring inlet; 2-3. Fourth outer ring channel; 2-4. Fourth inner ring channel; 2-5. Hollow lower channel; 2-6. Fourth outer ring sidewall; 2-7. Outer circumferential surface of the fourth outer ring sidewall; 2-8. Liquid tray mounting hole; 2-9. Thermocouple fixing hole; 2-10. Ignition needle fixing hole; 2-11. Fourth inner ring sidewall; 2-12. Fourth central ring wall;

[0041] 3. Air distribution plate; 3-1. Secondary air lower channel; 3-2. Third inner ring channel; 3-3. Hollow upper channel; 3-4. Air inlet; 3-5. Annular inclined surface; 3-6. Third outer ring channel; 3-7. Annular stop; 3-8. Heat insulation protrusion; 3-9. Top surface of secondary air lower channel; 3-10. Top surface of third outer ring side wall; 3-11. Plate fixing hole; 3-12. Inner circumference of annular inclined surface; 3-13. Third outer ring side wall; 3-14. Third inner ring side wall; 3-15. Third central ring wall; 3-16. Ignition needle clearance hole; 3-17. Thermocouple clearance hole;

[0042] 4. Outer flame cap; 4-1. Outer flame port; 4-2. Outer flame stabilizer groove; 4-3. Secondary air upper passage; 4-4. Inner ring of the gas distribution grille; 4-5. Sloping surface; 4-6. Flame transfer groove; 4-7. Outer ring of the gas distribution grille; 4-8. Lower fixing hole of the inner flame cap; 4-9. Outer flame stabilizer hole; 4-10. Second outer ring cavity; 4-11. Bottom end face of the secondary air upper passage; 4-12. Bottom end face of the side wall of the second outer ring; 4-13. Outer flame cap fixing hole; 4-14. Flame transfer hole; 4-15. Side wall of the second outer ring; 4-16. Side wall of the second inner ring; 4-17. Top wall of the second annular ring; 4-18. Grille bar;

[0043] 5. Inner burner cap; 5-1. Inner burner outlet; 5-2. Annular inner burner stabilizing groove; 5-3. Top cover; 5-3-1. Fixing post; 5-4. Annular gas slit; 5-5. Ignition groove; 5-6. Ignition hole; 5-7. Inner burner stabilizing hole; 5-8. Fixing hole on inner burner cap; 5-9. Hollow channel; 5-10. First outer ring sidewall; 5-11. First central ring wall; 5-12. First annular top wall; 5-13. First inner ring cavity; 5-14. Ignition part;

[0044] 6. Ignition needle; 7. Thermocouple. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0046] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] This embodiment proposes a gas stove, mainly including an injector 1, a burner head 2, a gas distribution plate 3, an outer burner cap 4, an inner burner cap 5, an ignition needle 6, a thermocouple 7, etc. (See also...) Figures 1 to 4 As shown.

[0049] The ejector 1 mainly includes an outer ring contraction tube 1-1 and an inner ring contraction tube 1-2. After the gas passes through the damper, a portion of the primary air is ejected into the outer ring contraction tube 1-1 and the inner ring contraction tube 1-2 respectively.

[0050] The burner head 2 mainly includes the fourth outer ring sidewall 2-6, the fourth inner ring sidewall 2-11, and the fourth central ring wall 2-12, etc. (See below) Figure 14 As shown, the fourth outer ring sidewall 2-6 and the fourth inner ring sidewall 2-11 form the fourth outer ring channel 2-3, and the fourth inner ring sidewall 2-11 and the fourth central ring wall 2-12 form the fourth inner ring channel 2-4; the fourth central ring wall 2-12 forms the hollow lower channel 2-5. The fourth outer ring channel 2-3 has an outer ring inlet 2-1, which is connected to the outer ring contraction tube 1-1 of the ejector 1; the fourth inner ring channel 2-4 has an inner ring inlet 2-2, which is connected to the inner ring contraction tube 1-2 of the ejector 1. A liquid tray mounting hole 2-8 is also provided on the burner head 2 for mounting the liquid tray. A thermocouple fixing hole 2-9 and an ignition needle fixing hole 2-10 are also provided on the burner head 2 for fixing the thermocouple 7 and the ignition needle 6, respectively.

[0051] The gas distribution plate 3 mainly includes the third outer ring sidewall 3-13, the third inner ring sidewall 3-14, and the third central ring wall 3-15, etc. See Figures 11 to 13 As shown, the third outer ring sidewall 3-13 and the third inner ring sidewall 3-14 form the third outer ring channel 3-6, the third inner ring sidewall 3-14 and the third central ring wall 3-15 form the third inner ring channel 3-2, and the third central ring wall 3-15 forms the hollow upper channel 3-3. After the gas distribution plate 3 is installed on the burner head 2, the third outer ring channel 3-6, the third inner ring channel 3-2, and the hollow upper channel 3-3 of the gas distribution plate 3 are correspondingly connected to the fourth outer ring channel 2-3, the fourth inner ring channel 2-4, and the hollow lower channel 2-5 of the burner head 2. The gas distribution plate 3 is also provided with an ignition needle avoidance hole 3-16 and a thermocouple avoidance hole 3-17, which are used to avoid the ignition needle 6 and the thermocouple 7, respectively, facilitating the installation of the ignition needle 6 and the thermocouple 7. The gas distribution plate 3 is also provided with a plate fixing hole 3-11 for fixing the outer burner cover 4.

[0052] An annular inclined surface 3-5 is connected to the bottom surface of the third outer ring sidewall 3-13 of the gas distribution plate 3, with the annular inclined surface 3-5 tilting downwards towards the central axis of the gas distribution plate. When the gas distribution plate 3 is installed on the burner head 2, the inner circumference 3-12 of the annular inclined surface 3-5 abuts against the top surface of the fourth outer ring sidewall 2-6 of the burner head 2, the bottom surface of the third inner ring sidewall 3-14 of the gas distribution plate 3 abuts against the top surface of the fourth inner ring sidewall 2-11 of the burner head 2, and the bottom surface of the third central ring wall 3-15 of the gas distribution plate 3 abuts against the top surface of the fourth central ring wall 2-12 of the burner head 2 to ensure the sealing between the gas distribution plate 3 and the burner head 2. In other words, the outer circumference of the annular inclined surface 3-5 is connected to the bottom surface of the third outer ring sidewall 3-13, and the inner circumference 3-12 of the annular inclined surface 3-5 abuts against the top surface of the fourth outer ring sidewall 2-6 of the burner head 2. The design of the annular inclined surface 3-5 increases the gap between the gas distribution plate 3 and the burner head 2, allowing users to easily wipe the liquid collection tray and the position of the liquid collection tray fixing screws, reducing cleaning dead corners. In this embodiment, to facilitate the docking and assembly of the gas distribution plate 3 and the burner head 2, the top surfaces of the fourth outer ring sidewall 2-6, the fourth inner ring sidewall 2-11, and the fourth central ring wall 2-12 of the burner head 2 are on the same horizontal plane, and the inner circumference 3-12 of the annular inclined surface 3-5 of the gas distribution plate 3, the bottom surface of the third inner ring sidewall 3-14, and the bottom surface of the third central ring wall 3-15 are on the same horizontal plane.

[0053] To improve the reliability of the connection between the gas distribution plate 3 and the burner head 2 and prevent lateral wobbling, a downwardly protruding annular stop portion 3-7 is provided around the inner circumference 3-12 of the annular inclined surface 3-5 of the gas distribution plate 3. Several circumferentially arranged heat-insulating protrusions 3-8 are formed on the inner circumferential surface of the annular stop portion 3-7, and each heat-insulating protrusion 3-8 abuts against the outer circumferential surface 2-7 of the fourth outer ring sidewall 2-6 of the burner head 2. That is, when the gas distribution plate 3 is installed on the burner head 2, the inner circumferential edge 3-12 of the annular inclined surface 3-5 abuts against the top surface of the fourth outer ring sidewall 2-6 of the burner head 2, and the several heat-insulating protrusions 3-8 on the inner circumferential surface of the annular stop portion 3-7 abut against the outer circumferential surface 2-7 of the fourth outer ring sidewall 2-6 of the burner head 2. Since the annular stop 3-7 does not directly contact the outer peripheral surface 2-7 of the fourth outer ring sidewall 2-6 of the burner head 2, but contacts the outer peripheral surface 2-7 of the fourth outer ring sidewall 2-6 through the heat insulation protrusion 3-8, and the contact between the heat insulation protrusion 3-8 and the outer peripheral surface 2-7 of the fourth outer ring sidewall 2-6 is approximately a point contact, the contact area between the gas distribution plate 3 and the burner head 2 is reduced, thus reducing the heat transferred from the gas distribution plate 3 to the burner head 2.

[0054] Therefore, in this embodiment of the gas stove, by designing an annular inclined surface 3-5 on the gas distribution plate 3, the gap between the gas distribution plate 3 and the burner head 2 is increased, allowing users to easily wipe the liquid collection tray and the position of the liquid collection tray fixing screws, reducing cleaning dead corners; by designing an annular stop part 3-7 and heat insulation protrusion 3-8, the connection reliability between the gas distribution plate 3 and the burner head 2 is improved, preventing left and right shaking, and the contact area between the gas distribution plate 3 and the burner head 2 is reduced, reducing the heat transferred from the gas distribution plate 3 to the burner head 2, avoiding heat waste, and using as much heat as possible to heat the bottom of the pot, thereby improving the thermal efficiency of the stove.

[0055] A certain distance exists between the inner circumference 3-12 of the annular inclined surface 3-5 of the gas distribution plate 3 and the third outer ring sidewall 3-13 to form an air inlet 3-4, which is connected to the third outer ring channel 3-6. The mixed gas in the fourth outer ring channel 2-3 of the burner head 2 enters the third outer ring channel 3-6 through the air inlet 3-4.

[0056] A heat-insulating coating is applied to the surface of the annular stop portion 3-7 to reduce the heat transferred from the annular inclined surface 3-5 to the annular stop portion 3-7, and also to reduce the heat transferred from the annular stop portion 3-7 to the heat-insulating protrusion 3-8 and the outside.

[0057] A heat-insulating coating is applied to the surface of the heat-insulating protrusion 3-8 to reduce the heat transferred from the annular stop 3-7 to the heat-insulating protrusion 3-8 and from the heat-insulating protrusion 3-8 to the fourth outer ring sidewall 2-6 of the burner head 2.

[0058] The surface of the annular inclined surface 3-5 is coated with a heat-insulating coating to reduce the heat transferred from the third outer ring sidewall 3-13 to the annular inclined surface 3-5 and from the annular inclined surface 3-5 to the annular stop portion 3-7.

[0059] A heat-insulating coating is applied to the top surfaces of the third outer ring sidewall 3-13, the third inner ring sidewall 3-14, and the third central ring wall 3-15 of the gas distribution plate 3 to reduce the heat transferred to the gas distribution plate 3 from the outer burner cap 4 and the inner burner cap 5. A heat-insulating coating is also applied to the bottom surfaces of the third outer ring sidewall 3-13, the third inner ring sidewall 3-14, and the third central ring wall 3-15 of the gas distribution plate 3 to reduce the heat transferred to the burner head 2 from the gas distribution plate 3.

[0060] The top surfaces of the fourth outer ring sidewall 2-6, the fourth inner ring sidewall 2-11, and the fourth central ring wall 2-12 of the burner head 2 are coated with heat-insulating coatings to reduce the heat transferred from the gas distribution plate 3 to the burner head 2.

[0061] In this embodiment, the heat insulation coating is made of materials such as silica aerosol, quartz plate, glass fiber or graphene, which have low thermal conductivity, stable performance and low cost.

[0062] In this embodiment, the material and thickness of the heat insulation coating vary depending on the material. If the heat insulation coating is made of silica aerosol, the thickness is 0.01mm to 0.5mm. If the heat insulation coating is made of quartz plate, glass fiber, or graphene, the thickness is 0.3mm to 2mm. If the thickness of the heat insulation coating is too small, it will not provide effective heat insulation; if the thickness is too large, it will be wasteful and affect the strength of the gas stove. Therefore, selecting the above-mentioned thickness range for the heat insulation coating ensures good heat insulation while avoiding excessive costs.

[0063] The outer flame cover 4 mainly includes the second outer ring sidewall 4-15, the second inner ring sidewall 4-16, the second annular top wall 4-17, etc., see [link / reference]. Figures 8 to 10 As shown, the second outer ring sidewall 4-15, the second inner ring sidewall 4-16, and the second annular top wall 4-17 form the second outer ring cavity 4-10. The outer circumferential surface of the second outer ring sidewall 4-15 has an annular inclined surface 4-5 that slopes downwards towards the central axis of the outer burner cap. Several spaced-apart outlet burner holes 4-1 are formed on the inclined surface 4-5 along the circumferential direction. The outlet burner holes 4-1 communicate with the second outer ring cavity 4-10, and the mixed gas within the second outer ring cavity 4-10 is transferred to the outlet burner holes 4-1. The inclined shape of the inclined surface 4-5 prevents liquids such as soup spilling from the pot from entering the outlet burner holes 4-1. A flame-transfer hole 4-14 is formed on the second inner ring sidewall 4-16, and the flame-transfer hole 4-14 communicates with the second outer ring cavity 4-10. The second annular top wall 4-17 is inclined towards the central axis of the outer flame cap, and a flame-transfer groove 4-6 is formed on the second annular top wall 4-17. One end of the flame-transfer groove 4-6 extends to the second inner ring sidewall 4-16 near the flame-transfer hole 4-14, and the other end extends to the second outer ring sidewall 4-15 near the outer flame hole 4-1. The flame-transfer groove 4-6 communicates with the second outer ring cavity 4-10. The ignition needle 6 ignites the gas at the flame-transfer hole 4-14, then the flame at the flame-transfer hole 4-14 ignites the gas at the flame-transfer groove 4-6, and finally the flame at the flame-transfer groove 4-6 ignites the gas at the outer flame hole 4-1. The function of the flame transfer groove 4-6 is to transfer the combustion of the flame at the flame transfer hole 4-14 to the outlet flame hole 4-1, igniting the gas discharged from the outlet flame hole 4-1.

[0064] An annular outer flame stabilizing groove 4-2 is formed circumferentially below the outer flame outlet 4-1 on the second outer ring sidewall 4-15 of the outer flame cap 4. Several equally spaced, circumferentially arranged outer flame stabilizing holes 4-9 are provided on the second outer ring sidewall 4-15. The outer flame stabilizing groove 4-2 communicates with the second outer ring cavity 4-10 through the outer flame stabilizing holes 4-9. The mixed gas in the second outer ring cavity 4-10 is transferred to the annular outer flame stabilizing groove 4-2 through the outer flame stabilizing holes 4-9. The combustion of the mixed gas in the annular outer flame stabilizing groove 4-2 ensures the stability of the combustion of the gas in the outer flame outlet 4-1 and prevents flame lift-off.

[0065] An air distribution grille is provided on the inner side of the second inner ring sidewall 4-16 of the outer flame cap 4. The air distribution grille includes an outer ring portion 4-7, an inner ring portion 4-4 arranged concentrically, and several grille strips 4-18 connecting the outer ring portion 4-7 and the inner ring portion 4-4. There is a certain distance between the outer ring portion 4-7 and the inner ring portion 4-4. Several grille strips 4-18 divide the space between the outer ring portion 4-7 and the inner ring portion 4-4 into several circumferentially arranged and equally spaced air inlets to connect the third inner ring channel 3-2 of the air distribution plate 3 with the first inner ring cavity 5-13 of the inner flame cap 5.

[0066] The inner fire cover 5 mainly includes the first outer ring sidewall 5-10, the first central ring wall 5-11, the first annular top wall 5-12, etc., see below. Figures 5 to 7 As shown; the first outer ring sidewall 5-10, the first central ring wall 5-11, and the first annular top wall 5-12 form a first inner ring cavity 5-13; the first central ring wall 5-11 forms a hollow channel 5-9. Several internal flame outlets 5-1 are formed circumferentially on the first outer ring sidewall 5-10, and the internal flame outlets 5-1 communicate with the first inner ring cavity 5-13, allowing the mixed gas within the first inner ring cavity 5-13 to be transferred to the internal flame outlets 5-1.

[0067] When the outer burner cap 4 and the inner burner cap 5 are assembled on the gas distribution plate 3, the bottom end face 4-12 of the second outer ring side wall 4-15 of the outer burner cap 4 abuts against the top end face 3-10 of the third outer ring side wall 3-13 of the gas distribution plate 3; the bottom end face of the outer ring portion 4-7 abuts against the top end face of the third inner ring side wall 3-14 of the gas distribution plate 3; the bottom end face of the inner ring portion 4-4 abuts against the top end face of the third central ring wall 3-15 of the gas distribution plate 3; the top end face of the outer ring portion 4-7 abuts against the bottom end face of the first outer ring side wall 5-10 of the inner burner cap 5; and the top end face of the inner ring portion 4-4 abuts against the bottom end face of the first central ring wall 5-11 of the inner burner cap 5.

[0068] The third outer ring channel 3-6 of the gas distribution plate 3 is connected to the second outer ring cavity 4-10 of the outer burner cap 4; the third inner ring channel 3-2 of the gas distribution plate 3 is connected to the first inner ring cavity 5-13 of the inner burner cap 5 through a gas distribution grille; the hollow upper channel 3-3 of the gas distribution plate 3 is connected to the hollow channel 5-9 of the inner burner cap 5. By designing the gas distribution grille, the mixed gas in the third inner ring channel 3-2 of the gas distribution plate 3 is more evenly distributed in the circumferential direction, improving the uniformity of the mixed gas entering the first inner ring cavity 5-13 of the inner burner cap 5.

[0069] A disc fixing hole 3-11 is provided on the gas distributor plate 3, and an outer burner cap fixing hole 4-13 is provided on the outer burner cap 4. The disc fixing hole 3-11 and the outer burner cap fixing hole 4-13 are aligned, and a screw is screwed into the disc fixing hole 3-11 and the outer burner cap fixing hole 4-13 to make the outer burner cap 4 and the gas distributor plate 3 stably connected together, ensuring that the outer burner cap 4 and the gas distributor plate 3 are tightly joined. An inner burner cap upper fixing hole 5-8 is provided on the inner burner cap 5, and an inner burner cap lower fixing hole 4-8 is provided on the outer burner cap 4. A screw is screwed into the inner burner cap lower fixing hole 4-8 and the inner burner cap upper fixing hole 5-8 to make the inner burner cap 5 and the outer burner cap 4 stably connected together, ensuring that the inner burner cap 5 and the outer burner cap 4 fit together.

[0070] A heat-insulating coating is applied to the surface of the gas distribution grille to reduce heat transfer from the outer burner cap 4 and inner burner cap 5 to the gas distribution plate 3, preventing heat waste and maximizing heat utilization for heating the pot bottom, thus improving the stove's thermal efficiency. The bottom surfaces 4-12 of the second outer ring sidewall 4-15 and 4-16 of the second inner ring sidewall of the outer burner cap 4 are also coated with a heat-insulating coating to reduce heat transfer from the outer burner cap 4 to the gas distribution plate 3 and the gas distribution grille. Similarly, the bottom surfaces 5-10 of the first outer ring sidewall and 5-11 of the first central ring wall of the inner burner cap 5 are coated with a heat-insulating coating to reduce heat transfer from the inner burner cap 5 to the gas distribution plate 3 and the gas distribution grille, preventing heat waste and maximizing heat utilization for heating the pot bottom, thus improving the stove's thermal efficiency.

[0071] Several secondary air upper channels 4-3 are formed on the inner side of the second inner ring sidewall 4-16 of the outer burner cap 4. These secondary air upper channels 4-3 are arranged circumferentially and at intervals around the first inner ring cavity 5-13 of the inner burner cap 5. Several secondary air lower channels 3-1 are arranged at intervals around the third inner ring channel 3-2 of the gas distribution plate 3. The bottom end faces of the secondary air upper channels 4-3 and the top end faces of the secondary air lower channels 3-1 are correspondingly abutted, and the secondary air upper channels 4-3 and the secondary air lower channels 3-1 are correspondingly connected. The bottom inlet of the secondary air lower channel 3-1 is connected to the outside, and the top outlet of the secondary air lower channel 3-1 is connected to the bottom inlet of the corresponding secondary air upper channel 4-3. The top outlet of the secondary air upper channel 4-3 is connected to the outside. The secondary air lower channels 3-1 and the secondary air upper channels 4-3 provide the secondary air required for the combustion of the gas discharged from the inner burner cap 5, thereby improving combustion efficiency.

[0072] Heat-insulating coatings are applied to the bottom surface 4-11 of the secondary air upper channel 4-3 of the outer burner cap 4 and the top surface 3-9 of the secondary air lower channel 3-1 of the gas distribution plate 3, respectively, to reduce the heat transferred from the outer burner cap 4 to the gas distribution plate 3, avoid heat waste, and use as much heat as possible to heat the bottom of the pot, thereby improving the thermal efficiency of the stove.

[0073] In this embodiment, the secondary air lower channel 3-1 extends vertically through the annular inclined plane 3-5. Due to the inclined design of the annular inclined plane 3-5, the cross-sectional area at the bottom entrance of the secondary air lower channel 3-1 is increased, ensuring sufficient secondary air replenishment and reducing air resistance.

[0074] In this embodiment, an ignition hole 5-6 is formed on the first outer ring sidewall 5-10 of the inner flame cap 5, and the ignition hole 5-6 communicates with the first inner ring cavity 5-13; a flame transmission hole 4-14 is formed on the second inner ring sidewall 4-16 of the outer flame cap 4, and the flame transmission hole 4-14 communicates with the second outer ring cavity 4-10; the distance between the flame transmission hole 4-14 of the outer flame cap 4 and the ignition hole 5-6 of the inner flame cap 5 is less than or equal to a set distance d, where d > 0.

[0075] In this embodiment of the gas stove, the distance between the flame transmission hole 4-14 and the ignition hole 5-6 is designed to be less than or equal to a set distance, meaning the distance between the flame transmission hole 4-14 and the ignition hole 5-6 is relatively close. When the user adjusts the firepower of the gas stove, during the process of adjusting the combustion of the gas discharged from the inner burner cap 5 to the point where the gas discharged from both the inner and outer burner caps is burning, the load on the outer burner cap 4 can be very small. The gas discharged from the flame transmission hole 4-14 is sufficient to be ignited by the flame at the ignition hole 5-6 of the inner burner cap 5, thereby igniting the gas at the outer burner cap 4's outer burner hole 4-1. At this time, the load on the outer burner cap 4 can be very small, meeting the user's needs for a large inner ring flame and a small outer ring flame. This solves the problem in the prior art where it is impossible to adjust the firepower to a large inner ring flame (larger flame on the inner burner cap) and a small outer ring flame (smaller flame on the outer burner cap), thus improving the user's cooking experience.

[0076] In this embodiment, the distance d is set to 5mm, that is, the distance between the flame transmission hole 4-14 of the outer burner cover 4 and the ignition hole 5-6 of the inner burner cover 5 is less than or equal to 5mm. This avoids the design difficulties of the gas stove caused by the distance being too small, and also avoids the excessive load on the outer burner cover 4 caused by the distance being too large.

[0077] The distance between ignition hole 5-6 and ignition needle 6 is equal to the distance between ignition hole 4-14 and ignition needle 6. Therefore, when ignition needle 6 ignites and discharges, it can simultaneously ignite the gas in inner flame cap 5 and outer flame cap 4, eliminating the time delay in ignition transmission from inner flame cap to outer flame cap. This ensures zero error in ignition of outer flame cap and solves the problems in the prior art, such as slow ignition transmission, poor ignition transmission, unburned outer flame cap, and gas leakage from outer flame cap, caused by the ignition needle igniting the inner flame cap first and then the inner flame cap igniting the outer flame cap.

[0078] To facilitate the structural design of the gas stove and simultaneously ignite the gas in both the inner burner cap 5 and the outer burner cap 4, an ignition part 5-14 is formed below the inner flame outlet hole 5-1 on the first outer ring sidewall 5-10 of the inner burner cap 5, protruding towards the flame transmission hole 4-14 of the outer burner cap 4. An ignition hole 5-6 is formed on the ignition part 5-14, penetrating the ignition part 5-14. One end of the ignition hole 5-6 is connected to the first inner ring cavity 5-13, and the other end of the ignition hole 5-6 faces the ignition hole 5-6 and is connected to the outside.

[0079] An ignition groove 5-5 is formed on the ignition part 5-14, dividing the ignition hole 5-6 into upper and lower parts. The opening of the ignition groove 5-5 faces the flame transmission hole 4-14 of the outer flame cap 4, and the opening of the ignition groove 5-5 is connected to the outside. The bottom of the ignition groove 5-5 is connected to the first inner ring cavity 5-13. By designing the ignition groove 5-5, the amount of gas transmitted from the first inner ring cavity 5-13 to the ignition hole 5-6 is increased, so as to ensure that the ignition needle 6 can successfully ignite the gas at the ignition hole 5-6, and then ignite the gas at the inner flame outlet hole 5-1. At the same time, it also ensures that during the flame adjustment process, the flame at the ignition hole 5-6 of the inner flame cap 5 can successfully ignite the gas discharged from the flame transmission hole 4-14 of the outer flame cap 4, and then successfully ignite the gas at the outer flame outlet hole 4-1 of the outer flame cap 4.

[0080] Several horizontally spaced ignition holes 5-6 are formed on the ignition part 5-14, which further increases the amount of gas transmitted from the first inner ring cavity 5-13 to the ignition holes 5-6, and further ensures that the ignition needle 6 can successfully ignite the gas at the ignition holes 5-6.

[0081] The first central annular wall 5-11 of the inner burner cap 5 forms a hollow channel 5-9. A top shield 5-3 is installed above the hollow channel 5-9, and the top shield 5-3 is located above the first annular top wall 5-12. An annular air gap 5-4 is formed between the top shield 5-3 and the first annular top wall 5-12, and the annular air gap 5-4 is connected to the hollow channel 5-9. The hollow channel 5-9 of the inner burner cap 5 is connected to the hollow upper channel 3-3 of the gas distribution plate 3. Air from the bottom of the burner head 2 is transferred to the hollow channel 5-9 of the inner burner cap 5 through the hollow lower channel 2-5 of the burner head 2 and the hollow upper channel 3-3 of the gas distribution plate 3, and then flows out from the inner annular air gap 5-4 to replenish the secondary air required for the combustion of the flame in the inner burner cap 5.

[0082] In this embodiment, the inner flame cover 5 is designed with a top baffle 5-3 to prevent soup, food residue, etc., from entering the hollow channel 5-9. Furthermore, an annular air slit 5-4 is formed between the top baffle 5-3 and the first annular top wall 5-12, which can replenish the secondary air required for flame combustion in the inner flame cover 5. Therefore, the inner flame cover 5 of this embodiment, through the design of the top baffle 5-3 and the annular air slit 5-4, solves the problems of easy liquid splashing into the inner flame cover and the insufficient replenishment of secondary air.

[0083] If the top cover 5-3 is too small, it will not be able to cover the first outer ring sidewall 5-10; if the top cover 5-3 is too large, it will easily affect the heating of the cookware by the combustion flame of the inner fire cover 5. Therefore, in this embodiment, the central axis of the first outer ring sidewall 5-10 of the inner fire cover 5 passes through the center of the top cover 5-3, and the diameter of the top cover 5-3 is equal to the outer diameter of the first outer ring sidewall 5-10. That is, the projection of the top cover 5-3 on the inner fire cover 5 completely covers the first outer ring sidewall 5-10, and of course, it also completely covers the first annular top wall 5-12, the first central ring wall 5-11, and the hollow channel 5-9, which prevents soup, food residue, etc. from dripping onto the inner fire cover 5 and avoids affecting the heating of the cookware by the inner fire cover 5.

[0084] A plurality of spaced-apart fixing posts 5-3-1 are formed on the inner circumferential surface of the first central annular wall 5-11, and these fixing posts 5-3-1 are fixed to the bottom end face of the top cover 5-3. That is, one end of the fixing post 5-3-1 is fixed to the inner circumferential surface of the first central annular wall 5-11, and the other end extends upward and is fixed to the bottom end face of the top cover 5-3, thus supporting and fixing the top cover 5-3. By designing a plurality of fixing posts 5-3-1 on the inner circumferential surface of the first central annular wall 5-11, a stable and reliable connection between the top cover 5-3 and the inner flame cover 5 is achieved, while avoiding interference with the flame combustion of the inner flame cover 5. In this embodiment, the plurality of fixing posts 5-3-1 are equally spaced on the inner circumferential surface of the first central annular wall 5-11, improving the connection stability between the top cover 5-3 and the inner flame cover 5.

[0085] The top cover 5-3 is detachably connected to the first central ring wall 5-11. When the top cover 5-3 is not needed, it can be removed; when the top cover 5-3 is needed, it can be installed on the inner fire cover 5. It is convenient and flexible to use and easy to install and remove.

[0086] When the top cover 5-3 is removed, a temperature sensing device is installed in the hollow channel 5-9 of the inner burner cover 5. This device collects temperature signals and sends them to the main control board of the gas stove. The main control board controls the operation of the gas valve or alarm based on the received temperature signal to prevent dry burning. If the temperature signal exceeds the temperature threshold, dry burning may occur. The main control board then closes the gas valve to cut off the gas supply and activates the alarm to alert the user, thus improving safety. Therefore, in this embodiment, the gas stove only requires the removal of the top cover 5-3 and the installation of the temperature sensing device to be compatible with products with or without anti-dry burning functionality.

[0087] An annular inner flame stabilizing groove 5-2 is formed circumferentially at the inner flame outlet 5-1 on the first outer ring sidewall 5-10 of the inner flame cover 5. Several equally spaced, circumferentially arranged inner flame stabilizing holes 5-7 are formed on the first outer ring sidewall 5-10. The annular inner flame stabilizing groove 5-2 communicates with the first inner ring cavity 5-13 through the inner flame stabilizing holes 5-7. The mixed gas in the first inner ring cavity 5-13 is transferred to the annular inner flame stabilizing groove 5-2 through the inner flame stabilizing holes 5-7. The combustion of the mixed gas in the annular inner flame stabilizing groove 5-2 ensures the stability of the combustion of the gas at the inner flame outlet 5-1 and prevents flame lift-off.

[0088] To allow for more flexible flow of the mixed gas within the first inner ring cavity 5-13, the inner flame outlet 5-1 of the inner flame cap 5 is inclined downwards towards the central axis of the inner flame cap, the annular inner flame stabilizer 5-2 is horizontally arranged, and the inner flame stabilizer 5-7 is vertically arranged. Part of the mixed gas within the first inner ring cavity 5-13 is directly ejected through the inner flame outlet 5-1, while the other part is transmitted through the inner flame stabilizer 5-7 to the annular inner flame stabilizer 5-2, and then ejected outwards through the annular inner flame stabilizer 5-2.

[0089] Outer ring gas flow path: When the gas valve is opened, the gas passes through the damper and a portion of the primary air is injected into the outer ring contraction tube 1-1 of the ejector 1. Then, it enters the fourth outer ring channel 2-3 through the outer ring inlet 2-1 of the burner head 2, then enters the third outer ring channel 3-6 of the gas distribution plate 3, and finally enters the second outer ring cavity 4-10 of the outer flame cover 4. It is then discharged through the outer flame hole 4-1, the outer flame stabilizing hole 4-9, and the outer flame stabilizing groove 4-2 for combustion.

[0090] Inner ring gas flow path: When the gas valve is opened, the gas passes through the damper and a portion of the primary air is injected into the inner ring contraction tube 1-2 of the ejector 1. Then, it enters the fourth inner ring channel 2-4 through the inner ring inlet 2-2 of the burner head 2, then enters the third inner ring channel 3-2 of the gas distribution plate 3, and finally enters the first inner ring cavity 5-13 of the inner flame cover 5 through the gas distribution grille. It is then discharged for combustion through the inner flame outlet hole 5-1, the inner flame stabilizing hole 5-7, and the annular inner flame stabilizing groove 5-2.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gas stove, comprising: The burner head includes a fourth outer ring sidewall, a fourth inner ring sidewall, and a fourth central ring wall. The fourth outer ring sidewall and the fourth inner ring sidewall form a fourth outer ring channel, and the fourth inner ring sidewall and the fourth central ring wall form a fourth inner ring channel. The air distribution plate includes a third outer ring sidewall, a third inner ring sidewall, and a third central ring wall. The third outer ring sidewall and the third inner ring sidewall form a third outer ring channel, and the third inner ring sidewall and the third central ring wall form a third inner ring channel. The third outer ring channel of the gas distribution plate is connected to the fourth outer ring channel of the burner head, and the third inner ring channel of the gas distribution plate is connected to the fourth inner ring channel of the burner head; characterized in that, The bottom end face of the third outer ring sidewall of the gas distribution plate is connected to the outer periphery of an annular inclined surface, which slopes downward toward the central axis of the gas distribution plate; the inner periphery of the annular inclined surface abuts against the top end face of the fourth outer ring sidewall of the burner head. A downwardly protruding annular stop is provided around the inner circumference of the annular inclined surface; a plurality of circumferentially arranged heat-insulating protrusions are formed on the inner circumferential surface of the annular stop, and the heat-insulating protrusions abut against the outer circumferential surface of the fourth outer ring sidewall of the furnace head. The outer burner cap of the gas stove includes a second outer ring sidewall, a second inner ring sidewall, and a second annular top wall; the second outer ring sidewall, the second inner ring sidewall, and the second annular top wall form a second outer ring cavity; The inner burner cap of the gas stove includes a first outer ring sidewall, a first central ring wall, and a first annular top wall; the first outer ring sidewall, the first central ring wall, and the first annular top wall form a first inner ring cavity; A gas distribution grille is provided on the inner side of the second inner ring sidewall of the outer fire cover. The gas distribution grille includes an outer ring portion, an inner ring portion, and a number of grille bars connecting the outer ring portion and the inner ring portion. The bottom end face of the second outer ring sidewall of the outer flame cap abuts against the top end face of the third outer ring sidewall of the gas distribution plate; The bottom surface of the outer ring abuts against the top surface of the third inner ring sidewall of the air distribution plate; The bottom surface of the inner ring abuts against the top surface of the third central ring wall of the air distribution plate; The top surface of the outer ring abuts against the bottom surface of the first outer ring sidewall of the inner fire cover; The top surface of the inner ring abuts against the bottom surface of the first central ring wall of the inner fire cover; The third outer ring channel of the gas distribution plate is connected to the second outer ring cavity of the outer flame cap; The third inner ring channel of the gas distribution plate is connected to the first inner ring cavity of the inner flame cap; Several grille bars divide the space between the outer ring and the inner ring into several circumferentially spaced air intake holes to connect the third inner ring channel of the air distribution plate with the first inner ring cavity of the inner burner cap.

2. The gas stove according to claim 1, characterized in that, The surface of the annular stop is coated with a heat-insulating coating, and the surface of the heat-insulating protrusion is coated with a heat-insulating coating.

3. The gas stove according to claim 1, characterized in that, The surface of the annular inclined plane is coated with a heat-insulating coating.

4. The gas stove according to claim 1, characterized in that, The top surfaces of the third outer ring sidewall, the third inner ring sidewall, and the third central ring wall of the gas distributor are each coated with a heat-insulating coating; the bottom surfaces of the third outer ring sidewall, the third inner ring sidewall, and the third central ring wall of the gas distributor are each coated with a heat-insulating coating.

5. The gas stove according to claim 1, characterized in that, The top surfaces of the fourth outer ring sidewall, the fourth inner ring sidewall, and the fourth central ring wall of the furnace head are respectively coated with heat-insulating coatings.

6. The gas stove according to claim 1, characterized in that, A heat-insulating coating is applied to the surface of the gas distribution grille, a heat-insulating coating is applied to the bottom end face of the second outer ring sidewall of the outer flame cap, and a heat-insulating coating is applied to the bottom end face of the first outer ring sidewall and the first central ring wall of the inner flame cap.

7. The gas stove according to claim 1, characterized in that, A plurality of secondary air upper channels are formed on the inner side of the second inner ring sidewall of the outer flame cap, and the plurality of secondary air upper channels are arranged circumferentially around the first inner ring cavity of the inner flame cap and at intervals. Several secondary air channels are arranged at intervals around the third inner ring channel of the air distribution plate. The bottom surfaces of the plurality of secondary air upper channels and the top surfaces of the plurality of secondary air lower channels abut against each other, and the plurality of secondary air upper channels and the plurality of secondary air lower channels are connected accordingly. A heat-insulating coating is applied to the bottom surface of the upper secondary air channel and the top surface of the lower secondary air channel.

8. The gas stove according to any one of claims 1 to 7, characterized in that, The heat insulation coating is made of silica aerosol, quartz plate, glass fiber or graphene.

9. The gas stove according to claim 8, characterized in that, If the material of the heat insulation coating is silica aerosol, then the thickness of the heat insulation coating is 0.01mm to 0.5mm; If the material of the heat insulation coating is quartz plate, glass fiber or graphene, the thickness of the heat insulation coating is 0.3mm to 2mm.

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