Inner ring fire cover, burner and gas cooker

Abstract

The present invention discloses an inner ring fire cover, a burner and a gas cooker, wherein the inner ring fire cover comprises: a top cover; an outer ring wall, the top cover is arranged on the outer ring wall; an inner ring wall, arranged inside the outer ring wall, the middle part of the inner ring wall forms a central cavity; and a connecting plate, arranged between the outer ring wall and the inner ring wall, the top cover, the outer ring wall and the connecting plate enclose a first inner ring gas cavity connected to the central cavity, the top cover is provided with a first inner ring fire hole connected to the first inner ring gas cavity at intervals along the circumferential direction, the outer ring wall is provided with a second inner ring fire hole connected to the first inner ring gas cavity, the outer ring wall, the connecting plate and the inner ring wall enclose a second inner ring gas cavity, and the outer ring wall is provided with flame stabilizing holes connected to the second inner ring gas cavity at intervals along the circumferential direction. The present invention can reduce the gas load of the first inner ring fire hole, so that the inner ring fire cover can maintain a stable combustion state under a very small fire state.

Description

Technical Field

[0001] The invention relates to the field of household appliances, and in particular to an inner ring fire cover, a burner and a gas cooker. Background Art

[0002] The inner ring fire cover is used to be installed on the burner to form an inner ring fire for heating the bottom of the pot near the center. The existing inner ring fire cover is provided with an inner ring gas chamber, and gas is input into the inner ring gas chamber through the inner ring gas input channel. In order to reduce the gas pressure of the inner ring gas, a flame stabilizing hole connected to the inner ring gas chamber is provided on the inner ring fire cover. Since the main fire hole, side fire hole and flame stabilizing hole on the existing inner ring fire cover are all connected to the inner ring gas chamber, the gas load of the inner ring gas chamber cannot be made very small. In the extremely small fire burning state, the gas load of the main fire hole is also relatively large. Summary of the invention

[0003] The main purpose of the present invention is to provide an inner ring fire cover, a burner and a gas cooker, aiming to improve the problem of large gas load in the minimum fire state of the existing inner ring fire cover.

[0004] To achieve the above object, the present invention provides an inner ring fire cover, comprising:

[0005] Top cover;

[0006] an outer annular wall, the top cover being arranged on the outer annular wall;

[0007] an inner annular wall, disposed inside the outer annular wall, wherein a central cavity is formed in the middle of the inner annular wall; and

[0008] A connecting plate is arranged between the outer ring wall and the inner ring wall, the top cover, the outer ring wall and the connecting plate together form a first inner ring gas chamber connected to the central chamber, the top cover is provided with a first inner ring fire hole connected to the first inner ring gas chamber, the outer ring wall is provided with second inner ring fire holes connected to the first inner ring gas chamber at intervals along the circumferential direction, the outer ring wall, the connecting plate and the inner ring wall together form a second inner ring gas chamber, the outer ring wall is provided with flame stabilizing holes connected to the second inner ring gas chamber at intervals along the circumferential direction.

[0009] Optionally, one end of the inner ring wall close to the top cover protrudes into the first inner ring combustion chamber, and a gap is provided between the inner ring wall and the top cover.

[0010] Optionally, the central cavity is arranged opposite to the first inner ring fire hole.

[0011] Optionally, a flame stabilizing groove is provided on the outer periphery of the outer ring wall, and one end of the flame stabilizing hole away from the second inner ring combustion chamber is connected to the flame stabilizing groove.

[0012] Optionally, the inner ring fire cover also includes:

[0013] A fixed net is installed on a side of the top cover away from the first inner ring gas chamber; and

[0014] The infrared combustion plate is installed between the fixed net and the top cover.

[0015] Optionally, one end of the outer ring wall close to the top cover is recessed with a stepped surface, and the outer periphery of the top cover is arranged on the stepped surface.

[0016] Based on the above inner ring fire cover, the present invention provides a burner, comprising a gas distribution plate, an outer ring fire cover and the inner ring fire cover as described above;

[0017] The inner ring fire cover and the outer ring fire cover are respectively mounted on the gas distribution plate, and the gas distribution plate includes:

[0018] An outer disc body, wherein the outer disc body is formed with an outer ring gas cavity, the outer ring fire cover is mounted on the outer disc body, and the outer ring fire cover is provided with an outer ring fire hole communicating with the outer ring gas cavity; and

[0019] Inner disc body, the inner ring fire cover is installed on the inner disc body, the inner disc body is formed with a first air inlet and a second air inlet, the first air inlet is respectively connected with the outer ring gas cavity and the central cavity, and the second air inlet is connected with the second inner ring gas cavity.

[0020] Optionally, the interior of the inner disk is hollow, and the inner disk is provided with an annular baffle, a first transition gas chamber is formed between the annular baffle and the inner wall of the inner disk, the central chamber of the inner ring fire cover and the outer ring gas chamber are respectively connected to the first transition gas chamber, the first air inlet is formed on the inner disk and is connected to the first transition gas chamber, and a second transition gas chamber is formed inside the annular baffle to respectively connect the second inner ring gas chamber and the second air inlet.

[0021] Optionally, an air duct connected to the first transition gas cavity is provided on the inner disk, and the air duct is connected to the inner ring wall of the inner ring fire cover, so that the first inner ring gas cavity is connected to the central cavity through the air duct.

[0022] Optionally, one of the inner disc body and the outer ring wall of the inner ring fire cover is provided with a protrusion, and the other one is provided with a limiting groove, and the protrusion is embedded in the limiting groove.

[0023] Optionally, the gas distribution plate further includes:

[0024] The support portion is disposed between the inner disk and the outer disk, and an air flow channel communicating with the first transition combustion gas cavity and the outer ring combustion gas cavity is formed in the support portion.

[0025] Optionally, there are multiple support parts, and a secondary air supply inlet for supplying secondary air to the inner ring fire cover is formed between adjacent support parts.

[0026] Based on the above burner, the present invention provides a gas cooker, which includes the above burner.

[0027] Based on the above burner, the present invention provides a gas cooker, which includes the above burner.

[0028] The technical solution of the present invention adopts a partition to separate the inside of the inner ring fire cover into a first inner ring gas chamber and a second inner ring gas chamber, and connects the first inner ring fire hole with the second inner ring fire hole, so that the second inner ring fire hole can share the gas load of the first inner ring gas chamber, thereby reducing the gas load of the first inner ring fire hole. The inner ring fire cover can be made smaller in an extremely small fire state, so that the inner ring fire cover can maintain a stable combustion state in an extremely small fire state. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0030] Figure 1 It is a structural schematic diagram of an embodiment of an inner ring fire cover of the present invention;

[0031] Figure 2 for Figure 1 A schematic diagram of an embodiment of the internal structure of the middle inner ring fire cover;

[0032] Figure 3 It is a structural schematic diagram of another embodiment of the inner ring fire cover of the present invention;

[0033] Figure 4 for Figure 3 A schematic diagram of an embodiment of the internal structure of the middle inner ring fire cover;

[0034] Figure 5 It is a structural schematic diagram of an embodiment of a burner of the present invention;

[0035] Figure 6 for Figure 5 A top view of

[0036] Figure 7 for Figure 6 Middle AA section view;

[0037] Figure 8 This is a schematic structural diagram of an embodiment of a gas distribution plate of the present invention;

[0038] Fig. 9 This is a schematic structural diagram of an embodiment of the first air inlet side of the air distribution plate of the present invention;

[0039] Fig.10 for Figure 8 A schematic diagram of an embodiment of the internal structure of a central gas distribution plate.

[0040] Description of Figure Numbers:

[0041] Label name Label name 10 Gas distributor 11 Outer disk 111 Outer ring gas chamber 12 Inner disc 121 Annular partition 122 First transition gas chamber 123 Second transition combustion chamber 124 Protrusion 125 Airway 13 First air inlet 14 Second air inlet 20 Outer ring fire cover 21 Outer ring fire hole 30 Inner ring fire cover 31 Top cover 32 First inner ring fire hole 33 Outer ring wall 331 Second inner ring fire hole 332 Flame stabilizing tank 333 Flame stabilizing hole 34 Inner ring wall 35 Connecting plate 36 The first inner ring gas chamber 37 Second inner ring combustion chamber 38 Limit slot 40 Support 41 Airflow Channel 50 Fixed Network 51 Infrared combustion panel

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] See also Figure 1 and Figure 2The present invention proposes an inner ring fire cover 30, comprising: a top cover 31; an outer ring wall 33, wherein the top cover 31 is arranged on the outer ring wall 33; an inner ring wall 34, which is arranged inside the outer ring wall 33, and the middle part of the inner ring wall 34 forms a central cavity; and a connecting plate 35, which is arranged between the outer ring wall 33 and the inner ring wall 34. The top cover 31, the outer ring wall 33 and the connecting plate 35 together form a first inner ring gas cavity 36 connected to the central cavity, the top cover 31 is provided with a first inner ring fire hole 32 connected to the first inner ring gas cavity 36, the outer ring wall 33 is provided with a second inner ring fire hole 331 connected to the first inner ring gas cavity 36, the outer ring wall 33, the connecting plate 35 and the inner ring wall 34 together form a second inner ring gas cavity 37, and the outer ring wall 33 is provided with a flame stabilizing hole 333 connected to the second inner ring gas cavity 37.

[0047] The first inner ring fire hole 32 is a through hole provided on the top cover 31, and the second inner ring fire hole 331 and the flame stabilizing hole 333 are through holes provided on the outer ring wall 33. The inner ring wall 34, the outer ring wall 33 and the connecting plate 35 may be an integral structure. The connecting plate 35 divides the inner ring fire cover 30 into a first inner ring gas chamber 36 close to the top cover 31 and a second inner ring gas chamber 37 far from the top cover 31.

[0048] The inner ring wall 34 is hollow inside to form the central cavity, which serves as an air inlet passage for the first inner ring combustion chamber 36. The first inner ring combustion chamber 36 and the second inner ring combustion chamber 37 are independent of each other and have independent air inlet passages respectively.

[0049] The first inner ring fire hole 32 may be a plurality of fire holes arranged near the middle of the top cover 31. The airflow entering the central cavity enters the first inner ring gas cavity 36, part of the airflow is ejected and burned from the first inner ring fire hole 32, and part of the airflow is ejected and burned from the second inner ring fire hole 331. Since the airflow of the first inner ring gas cavity 36 can be divided into two parts for output, the second inner ring fire hole 331 can share part of the gas load of the first inner ring fire hole 32, thereby reducing the gas load of the first inner ring fire hole 32. By reducing the gas load of the first inner ring fire hole 32, when the burner corresponding to the inner ring fire cover 30 is in an extremely small fire combustion state, the gas load of the first inner ring fire hole 32 is relatively small, thereby making it possible to keep the flame formed by the ejection and combustion of the first inner ring fire hole 32 stable, so that the inner ring fire cover can also maintain a stable combustion state in an extremely small fire state.

[0050] The inner ring fire cover is used to be installed on a burner, and the burner has a functional component for supplying gas to the first inner ring gas chamber 36 and the second inner ring gas chamber 37 of the inner ring fire cover, and reference may be made to the prior art.

[0051] In this embodiment, optionally, one end of the inner ring wall 34 close to the top cover 31 protrudes into the first inner ring gas cavity 36, and there is a gap between the inner ring wall 34 and the top cover 31. The airflow input into the first inner ring gas cavity 36 through the central cavity is output close to the first inner ring fire hole 32, so that the air pressure at the first inner ring fire hole 32 is relatively large, so that the first inner ring fire hole 32 has a relatively stable combustion state. Since the second inner ring fire hole 331 is connected to the first inner ring gas cavity 36, the second fire hole can share the gas load of the first inner ring gas cavity 36. In cooperation with the first inner ring fire hole 32, the gas load of the output gas pressure in the first inner ring fire hole 32 is less than the gas load in the central cavity. Compared with the method of connecting the first inner ring fire hole 32 with the central cavity, under the premise that the first inner ring fire hole 32 has sufficient airflow supply, the gas pressure when the first inner ring fire hole 32 sprays gas is relatively reduced, thereby forming a stable combustion state to prevent flame separation. In the extremely small fire combustion state, the flame formed by the spraying of the first inner ring fire holes 32 is more stable, forming a stable extremely small fire combustion state.

[0052] Since the second inner ring fire hole 331 can share the gas load of the first inner ring gas chamber 36, the gas load of the jet airflow of the first inner ring fire hole 32 is relatively reduced, and the first inner ring fire hole 32 can be made smaller, with a smaller flame intensity in the extremely small fire combustion state, and thus have a better extremely small fire combustion state.

[0053] Optionally, in this embodiment, the central cavity is arranged opposite to the first inner ring fire hole 32. The first inner ring fire hole 32 can be arranged close to the axis of the top cover 31, and a plurality of through holes are evenly distributed at a position close to the axis of the top cover 31 as the first inner ring fire hole 32, so that the first inner ring fire hole 32 has a stable and uniform gas supply, and when the airflow is output from the first inner ring fire hole 32, it can have a higher combustion efficiency, and by making the airflow spray evenly, the stability of the flame can be improved to prevent flame separation.

[0054] The second inner ring fire holes 331 are a plurality of fire holes arranged at intervals along the circumferential direction of the outer ring wall 33. When the inner ring fire cover 30 sprays gas for combustion, the second inner ring fire holes 331 form flames on the outside of the first inner ring fire holes 32. The first inner ring fire holes 32 and the second inner ring fire holes 331 can form a more stable heating surface. Since the first inner ring fire holes 32 and the second inner ring fire holes 331 are both connected to the first inner ring gas chamber 36, the flame intensity of the first inner ring fire holes 32 and the second inner ring fire holes 331 is relatively uniform. When the inner ring fire cover 30 sprays flames for combustion normally, the first inner ring fire holes 32 and the second inner ring fire holes 331 spray flames uniformly, which can form a relatively stable heating surface at the bottom of the cookware.

[0055] Since the first inner ring fire holes 32 are arranged on the top cover 31, and the second inner ring fire holes 331 are arranged on the outer ring wall 33, when the cookware is placed on the burner, the first inner ring fire holes 32 heat the center of the bottom surface of the cookware, and the generated heat gradually radiates to the periphery of the bottom surface of the cookware. Since the second inner ring fire holes 331 can share the gas load of the first inner ring fire holes 32, the flame of the first inner ring fire holes 32 is relatively reduced, thereby preventing the problem of high temperature at the center of the bottom of the cookware; under the action of the second inner ring fire holes 331, the first inner ring fire holes 32 and the second inner ring fire holes 331 form a heating surface with relatively stable temperature, thereby making the heating surface of the bottom of the cookware more uniform, which helps to improve the problem of uneven heating of the bottom of the cookware.

[0056] The flame stabilizing hole 333 is connected to the second inner ring combustion chamber 37, and the second inner ring combustion chamber 37 has an air inlet passage different from that of the first inner ring combustion chamber 36. The flame stabilizing holes 333 are circumferentially spaced and distributed along the outer circumference of the outer ring wall 33, and the airflow is transported to the flame stabilizing hole 333 through the second inner ring combustion chamber 37. When the flame stabilizing hole 333 sprays airflow around the second inner ring fire hole 331, the jet formed by the flame stabilizing hole 333 and the jet formed by the second inner ring fire hole 331 can form two airflows with different flow rates. Under the action of the two airflows with different flow rates, a stable flame is formed outside the inner ring fire cover 30.

[0057] Since the second inner ring gas chamber 37 is isolated from the first inner ring gas chamber 36, the gas pressure of the second inner ring gas chamber 37 is not affected when the gas pressure of the first inner ring gas chamber 36 is adjusted. Therefore, when the inner ring fire cover 30 is in different combustion states, the flow rate of the airflow formed by the injection of the flame stabilizing hole 333 can be adjusted accordingly, so that the inner ring fire cover 30 can form a flame stabilizing structure under different combustion states, so that the inner ring fire cover 30 is in a stable combustion state to prevent flame separation.

[0058] When manufacturing the second inner ring fire hole 331 and the flame stabilizing hole 333, the axial directions of the second inner ring fire hole 331 and the flame stabilizing hole 333 can be set at a certain angle, so that the direction of the airflow ejected from the second inner ring fire hole 331 is inconsistent with the direction of the airflow ejected from the flame stabilizing hole 333. When the flame stabilizing hole 333 and the second inner ring fire hole 331 eject airflows, the airflows of different directions interact with each other, so that the second inner ring fire hole 331 forms a stable flame. Since the flow rates of the gas ejected from the second inner ring fire hole 331 and the flame stabilizing hole 333 can be controlled separately, the angle and flow rate of the airflow ejected from the flame stabilizing hole 333 can be adjusted along with the adjustment of the second inner ring fire hole 331, thereby achieving a good flame stabilizing effect under different combustion conditions.

[0059] In order to form a stable airflow state, in this embodiment, optionally, a flame stabilizing groove 332 is provided on the outer periphery of the outer ring wall 33, and one end of the flame stabilizing hole 333 away from the second inner ring combustion chamber 37 is connected to the flame stabilizing groove 332. The airflow is transported from the flame stabilizing hole 333 to the flame stabilizing groove 332, and when it is output from the flame stabilizing groove 332, a uniformly distributed airflow state can be formed, so that the airflow can form a stable flow field on the outer ring wall 33, further improving the flame stabilizing effect.

[0060] See also Figure 3 and Figure 4 In one embodiment of the present invention, the inner ring fire cover 30 further includes: a fixed net 50, installed on a side of the top cover 31 away from the first inner ring gas chamber 36; and an infrared combustion plate 51, installed between the fixed net 50 and the top cover 31. There is a gap between the fixed net 50 and the top cover 31, and the infrared combustion plate 51 is arranged in the gap between the fixed net 50 and the top cover 31.

[0061] The infrared combustion plate 51 is used to make the inner ring fire cover 30 infrared combustion state, so that the inner ring fire cover 30 has higher heating efficiency and produces less harmful gas. The inner ring fire cover 30 can also include other functional components adapted to the infrared combustion plate 51, which can refer to the prior art.

[0062] In order to facilitate the installation of the top cover 31, in this embodiment, optionally, the outer ring wall 33 is provided with a stepped surface at one end close to the top cover 31, and the outer periphery of the top cover 31 is arranged on the stepped surface. The outer periphery of the top cover 31 is adapted to the stepped surface so that the top cover 31 is snapped on the stepped surface.

[0063] The top cover 31 and the outer ring wall 33 may be detachable structures. When manufacturing the top cover 31, a circular groove may be recessed on the side of the top cover 31 facing away from the first inner ring gas, the infrared combustion plate 51 may be embedded in the circular groove, and the fixed net 50 may be arranged on the side of the infrared combustion plate 51 facing away from the first inner ring gas cavity 36. When installing the fixed net 50, an annular groove may be arranged on the top cover 31, and the outer periphery of the fixed net 50 may be embedded in the annular groove to prevent the fixed net 50 from moving away from the top cover 31. When setting the circular groove, a flange may be arranged at one end of the circular groove away from the first inner ring gas cavity 36, and the annular groove may be formed by the flange and the inner wall of the circular groove, so that the flange abuts against the surface of the fixed net 50 on one side facing away from the infrared combustion plate 51 to prevent the fixed net 50 from falling off.

[0064] The present invention provides an embodiment of a burner based on the above-mentioned inner ring fire cover 30 .

[0065] like Figure 5 , Figure 6 and Figure 7 The burner comprises a gas distribution plate 10, an outer ring fire cover 20 and an inner ring fire cover 30 as described in any of the above embodiments; the inner ring fire cover 30 and the outer ring fire cover 20 are respectively mounted on the gas distribution plate 10, and the gas distribution plate 10 is provided with a first air inlet 13 and a second air inlet 14, the first air inlet 13 is respectively connected to the outer ring fire hole 21 and the central cavity, and the second air inlet 14 is connected to the second inner ring combustion cavity 37. The first air inlet 13 and the second air inlet 14 are two independent air inlet ports.

[0066] The gas distribution plate 10 includes: an outer plate body 11, the outer plate body 11 forms an outer ring gas cavity 111, the outer ring fire cover 20 is installed on the outer plate body 11, and the outer ring fire cover 20 is provided with an outer ring fire hole 21 connected to the outer ring gas cavity 111; and an inner plate body 12, the inner ring fire cover 30 is installed on the inner plate body 12, the inner plate body 12 forms the first air inlet 13 and the second air inlet 14, the first air inlet 13 is respectively connected to the outer ring gas cavity 111 and the central cavity, and the second air inlet 14 is connected to the second inner ring gas cavity 37.

[0067] The outer disc 11 is connected to the inner disc 12 to form the outer ring combustion chamber 111, and the outer ring fire cover 20 is installed on the outer disc 11. The first air inlet 13 is used to provide airflow to the outer ring fire hole 21 and the central cavity. The airflow enters the gas distribution disc 10 from the first air inlet 13. The central cavity is connected to the first inner ring combustion chamber 36. Therefore, the airflow of the first air inlet 13 is respectively transported to the outer ring fire hole 21, the first inner ring fire hole 32 and the second inner ring fire hole 331. Since the outer ring fire hole 21 is arranged on the outer ring fire cover 20, the flame formed by the outer ring fire hole 21 forms an outer ring fire. When the burner is running, the first air inlet 13 supplies air to the first inner ring fire hole 32, the second inner ring fire hole 331 and the outer ring fire hole 21 at the same time. When adjusting the flame of the burner, only the air pressure of the first air inlet 13 can be adjusted to achieve a wider range of adjustment of the burner.

[0068] Since the outer ring fire hole 21 and the second inner ring fire hole 331 share the air intake load of the first air inlet 13, the gas load at the first inner ring fire hole 32 is relatively reduced, and the first inner ring fire hole 32 can be made smaller to reduce the intensity of the central flame formed by the first inner ring fire hole 32 of the burner. When the burner is running, the bottom surface of the pot faces the burner, and the central flame heats the center of the bottom of the pot. After the central flame acts on the center of the bottom surface of the pot, it gradually radiates toward the outer periphery of the pot, and cooperates with the middle ring flame formed by the second inner ring fire hole 331 to form a flame that heats the bottom surface of the pot evenly, thereby avoiding the problem of high heating temperature in the area corresponding to the central flame and the middle ring flame and low temperature in other areas due to the high temperature of the central flame and the middle ring flame, which helps to improve the uniformity of heating and prevent local deformation of the bottom surface of the pot due to uneven heating.

[0069] The second air inlet 14 is used to supply air to the second inner ring combustion chamber 37, and when the air intake load of the first air inlet 13 is adjusted, the second air inlet 14 is not affected. Since the outer ring fire hole 21, the first inner ring fire hole 32 and the second inner ring fire hole 331 can be adjusted more widely, the flame stabilizing hole 333 can be adjusted accordingly when adjusting, and the air flow velocity formed by the flame stabilizing hole 333 is adjusted according to the air flow velocity formed by the second inner ring fire hole 331, so that the burner is in a stable combustion state.

[0070] The outer ring gas chamber 111 is used to form a chamber for accommodating gas. The airflow enters the outer ring gas chamber 111 from the first air inlet 13, so that the gas and air can be fully mixed and dispersed in the outer ring gas chamber 111, thereby making the flame formed by the outer ring fire hole 21 burn more fully, thereby improving the gas utilization efficiency and reducing the emission of harmful substances.

[0071] See also Figures 7 to 10 In one embodiment of the present invention, the interior of the inner disk body 12 is hollow, and the inner disk body 12 is provided with an annular baffle 121, and a first transition gas chamber 122 is formed between the annular baffle 121 and the inner wall of the inner disk body 12, the central chamber and the outer ring gas chamber 111 are respectively connected to the first transition gas chamber 122, the first air inlet 13 is formed on the inner disk body 12 and is connected to the first transition gas chamber 122, and a second transition gas chamber 123 is formed inside the annular baffle 121, which is respectively connected to the second inner ring gas chamber 37 and the second air inlet 14.

[0072] The annular baffle 121 is a hollow structure, and the second transitional combustion chamber 123 is formed inside the annular baffle 121. The second transitional combustion chamber 123 is used to connect the second inner ring combustion chamber 37 and the second air inlet 14. The annular chamber formed between the outer wall of the annular baffle 121 and the inner wall of the inner plate 12 is the first transitional combustion chamber 122. The airflow entering the first transitional combustion chamber 122 from the first air inlet 13 is respectively transported to the first inner ring combustion chamber 36 and the outer ring combustion chamber 111.

[0073] When manufacturing the gas distribution plate 10, a passage connecting the outer ring gas chamber 111 and the first transition gas chamber 122 can be provided between the outer plate body 11 and the inner plate body 12. The outer ring fire holes 21 are distributed on the outer ring fire cover 20 at intervals along the outer circumference of the outer ring fire cover 20.

[0074] See also Fig. 9 The first air inlet 13 can be arranged on the same side of the inner disc 12, and the first air inlet 13 and the second inner ring fire cover 30 are installed at the end of the main disc away from the first air inlet 13. The outer ring wall 33 of the inner ring fire cover 30 cooperates with the end surface of the main disc, so that the main disc closes the end of the second inner ring gas cavity 37 away from the first inner ring gas cavity 36, and only the annular partition 121 forms a connection between the second inner ring gas cavity 37 and the second air inlet 14.

[0075] Optionally, in this embodiment, in order to facilitate the installation of the inner ring fire cover 30, the inner plate 12 is provided with an air guide pipe 125 communicating with the first transitional gas chamber 122, and the air guide pipe 125 is connected to the inner ring wall 34 of the inner ring fire cover 30, so that the first inner ring gas chamber 36 is communicated with the central chamber through the air guide pipe 125. The air guide pipe 125 can be inserted into the inner ring wall 34, so that the air guide pipe 125 and the inner ring wall 34 serve as a passage communicating with the first transitional gas chamber 122 and the first inner ring gas chamber 36.

[0076] When the air guide tube 125 is connected to the inner ring wall 34, the air guide tube 125 can be used to define the relative position between the inner ring fire cover 30 and the inner disk body 12. The outer ring wall 33 can be abutted against the inner disk body 12 to make the inner ring fire cover 30 and the inner disk body 12 relatively closed.

[0077] In order to facilitate the cooperation between the inner ring fire cover 30 and the inner disk body 12, in this embodiment, optionally, one of the inner disk body 12 and the outer ring wall 33 of the inner ring fire cover 30 is provided with a protrusion 124, and the other one is provided with a limiting groove 38, and the protrusion 124 is embedded in the limiting groove 38. The protrusion 124 cooperates with the outer ring wall 33 to prevent the inner ring fire cover 30 from radial movement. In this way, the stability of the inner ring fire cover 30 can be improved.

[0078] The protrusion 124 can be coaxially arranged with the gas guide pipe 125 , and the connection portion between the second transition combustion chamber 123 formed by the annular partition 121 and the second inner ring combustion chamber 37 can be located on the wall surface between the protrusion 124 and the gas guide pipe 125 .

[0079] See also Figure 7 , Figure 8 and Fig.10 In one embodiment of the present invention, the gas distribution plate 10 further includes: a support portion 40, which is disposed between the inner plate body 12 and the outer plate body 11, and an air flow channel 41 is formed in the support portion 40 to connect the first transition gas chamber 122 and the outer ring gas chamber 111. The support portion 40 is used to connect the inner plate body 12 and the outer plate body 11, so that there is a certain distance between the outer ring flame formed by the outer ring fire cover 20 and the middle ring flame formed by the second inner ring fire hole 331.

[0080] When the burner is running, the heat generated by the flames formed by the first inner ring fire hole 32 and the second inner ring fire hole 331 will radiate toward the periphery along the bottom end surface of the cookware. By forming a gap in the support portion 40, the heat of the middle ring flame formed by the second inner ring fire hole 331 can be gradually radiated toward the outer ring flame to form a uniform heating surface. Since the flame stabilizing hole 333 can form an airflow with a different airflow velocity from that of the second inner ring fire hole 331, the flame formed by the second inner ring fire hole 331 can maintain a stable combustion state, thereby forming a wider uniform heating area between the middle ring flame and the outer ring flame, so that the bottom of the cookware can be heated evenly.

[0081] In order to improve the combustion efficiency, in this embodiment, optionally, the number of the support parts 40 is multiple, and a secondary air supply inlet for supplying secondary air to the inner ring fire cover 30 is formed between adjacent support parts 40. The secondary air supply inlet is used to supply secondary air from the bottom to the second inner ring fire hole 331 to improve the combustion efficiency of the flame formed by the inner ring fire cover 30.

[0082] The secondary air supply inlets between the plurality of support portions 40 can form a uniform air supply channel on the periphery of the inner ring fire cover 30 to improve the gas combustion efficiency. When the burner is running, a high-temperature area will be formed near the first inner ring fire hole 32, the second inner ring fire hole 331 and the outer ring fire hole 21, making it difficult for air to be input into the burner from the side. By arranging the secondary air supply inlets between the adjacent support portions 40, the secondary air can be replenished from the bottom of the burner toward the inner ring fire cover 30, and the secondary air can be more easily replenished from the low-temperature area to the high-temperature area, which helps to increase the amount of secondary air replenished.

[0083] Based on the above burner, the present invention provides an embodiment of a gas cooker.

[0084] The gas cooker includes a burner as described in any of the above embodiments. The burner serves as a heating component of the gas cooker, and the gas cooker may also include other functional components, which may refer to the prior art. The first air inlet 13 and the second air inlet 14 correspond to two air inlet ports respectively. After the two air flows enter the burner through the first air inlet 13 and the second air inlet 14 respectively, they are divided into three outputs, so that the first inner ring fire hole 32 of the burner can be made relatively smaller. By making the central flame formed by the first inner ring fire hole 32 smaller, the central flame can be made to burn in an extremely small flame state. The second inner ring fire hole 331 is used to share the gas load at the first inner ring fire hole 32, so that the gas load of the first inner ring fire hole 32 is reduced, and the stability of the central flame is relatively higher, thereby avoiding the problem of flame separation when the burner is burning in an extremely small flame state.

[0085] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An inner ring fire cover, characterized in that: include: Top cover; an outer annular wall, the top cover being arranged on the outer annular wall; An inner ring wall is arranged inside the outer ring wall, and a central cavity is formed in the middle of the inner ring wall; as well as A connecting plate is arranged between the outer ring wall and the inner ring wall, the top cover, the outer ring wall and the connecting plate together form a first inner ring gas chamber connected to the central chamber, the top cover is provided with a first inner ring fire hole connected to the first inner ring gas chamber, the outer ring wall is provided with second inner ring fire holes connected to the first inner ring gas chamber at intervals along the circumferential direction, the outer ring wall, the connecting plate and the inner ring wall together form a second inner ring gas chamber, the outer ring wall is provided with flame stabilizing holes connected to the second inner ring gas chamber at intervals along the circumferential direction.

2. The inner ring fire cover according to claim 1, characterized in that: One end of the inner ring wall close to the top cover protrudes into the first inner ring combustion chamber, and a gap is provided between the inner ring wall and the top cover.

3. The inner ring fire cover according to claim 2, characterized in that: The central cavity is arranged opposite to the first inner ring fire hole.

4. The inner ring fire cover according to claim 1, characterized in that: A flame stabilizing groove is provided on the outer periphery of the outer ring wall, and one end of the flame stabilizing hole away from the second inner ring combustion chamber is connected to the flame stabilizing groove.

5. The inner ring fire cover according to any one of claims 1 to 4, characterized in that: The inner ring fire cover also includes: A fixed net is installed on a side of the top cover away from the first inner ring gas chamber; and The infrared combustion plate is installed between the fixed net and the top cover.

6. The inner ring fire cover according to claim 5, characterized in that: One end of the outer ring wall close to the top cover is concavely provided with a stepped surface, and the outer periphery of the top cover is arranged on the stepped surface.

7. A burner, characterized in that: It comprises a gas distribution plate, an outer ring fire cover and an inner ring fire cover as claimed in any one of claims 1 to 6, wherein the inner ring fire cover and the outer ring fire cover are respectively installed on the gas distribution plate, and the gas distribution plate comprises: An outer disc body, wherein the outer disc body is formed with an outer ring gas cavity, the outer ring fire cover is mounted on the outer disc body, and the outer ring fire cover is provided with an outer ring fire hole communicating with the outer ring gas cavity; and Inner disc body, the inner ring fire cover is installed on the inner disc body, the inner disc body is formed with a first air inlet and a second air inlet, the first air inlet is respectively connected with the outer ring gas cavity and the central cavity, and the second air inlet is connected with the second inner ring gas cavity.

8. The burner according to claim 7, characterized in that The interior of the inner disk is hollow, and the inner disk is provided with an annular baffle. A first transition gas chamber is formed between the annular baffle and the inner wall of the inner disk. The central chamber of the inner ring fire cover and the outer ring gas chamber are respectively connected to the first transition gas chamber. The first air inlet is formed on the inner disk and is connected to the first transition gas chamber. A second transition gas chamber is formed inside the annular baffle to respectively connect the second inner ring gas chamber and the second air inlet.

9. The burner according to claim 8, characterized in that The inner disc body is provided with an air duct connected to the first transitional gas cavity, and the air duct is connected to the inner ring wall of the inner ring fire cover, so that the first inner ring gas cavity is connected to the central cavity through the air duct.

10. The burner according to claim 8, characterized in that One of the inner disc body and the outer ring wall of the inner ring fire cover is provided with a protrusion, and the other one is provided with a limiting groove, and the protrusion is embedded in the limiting groove.

11. The burner according to claim 8, characterized in that The gas distributor also includes: The support portion is disposed between the inner disk and the outer disk, and an air flow channel communicating with the first transition combustion gas cavity and the outer ring combustion gas cavity is formed in the support portion.

12. The burner according to claim 11, characterized in that There are multiple support parts, and secondary air supply inlets for supplying secondary air to the inner ring fire cover are formed between adjacent support parts.

13. A gas cooker, characterized in that: The gas cooker comprises the burner according to any one of claims 7 to 12.

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