Inner fire cap, burner and cooking appliance

Abstract

The present invention relates to an inner burner cap, a burner, and a cooking appliance including the inner burner cap. The inner burner cap includes a burner cap body and a partition plate. The projection of the burner cap body along its axial direction is in an annular structure, and a plurality of fire groove groups are arranged at intervals along its circumferential direction on the top; the partition plate is connected to the middle of the burner cap body, and the partition plate is provided with a first through hole for the ignition needle to pass through, and the aperture of the first through hole is larger than the diameter of the ignition needle to form a gap between the partition plate and the ignition needle. The inner burner cap of the present invention avoids the aging of parts such as the burner and the liquid receiving tray caused by the downward pressure of incompletely burned gas by arranging a partition plate at the center of the burner cap body, improves safety, and the gap between the second through hole and the ignition needle reduces the flow area of air supplement and accelerates the rapid passage of the secondary supplemented air through the gap.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to an inner fire cover, a burner including the inner fire cover, and a cooking stove including the burner. Background Art

[0002] Gas stoves are generally divided into direct-fire gas stoves and swirling-fire gas stoves according to the gas outlet mode through the exhaust holes. The exhaust holes of the direct-fire gas stove are multiple round holes arranged vertically upward, and the adjustment valve and air damper of the direct-fire gas stove can ensure uniform combustion, with good combustion intensity, large firepower, uniform secondary air ratio, full combustion, and complete heat absorption. Compared with the direct-fire gas stove, the exhaust holes of the swirling-fire gas stove are strip-shaped and spiral-shaped, with a large and more uniform combustion coverage area. Its flame can be better distributed on a relatively flat bottom of the pot, with a wider heating surface. The conversion rate of the swirling fire is higher than that of the direct-fire gas stove, saving more gas, but relatively the firepower is not as large as that of the direct-fire gas stove.

[0003] Currently, in order to obtain higher energy efficiency, the height of the pot support of the swirling-fire gas stove is controlled at a relatively low level. When users cook with non-flat-bottomed pots (such as pointed-bottomed pots, round-bottomed pots, etc.), due to the concentrated inner swirling flame and the relatively low height of the pot support, the pot is relatively close to the inner-ring flame of the burner, which may cause insufficient air intake and incomplete gas combustion. The unburned gas will not only increase the content of carbon monoxide and the like in the dry flue gas, but also mix with air at the secondary air supply airway opening of the burner divider. After the mixed gas is ignited by the flame on the fire cover, it burns stably at the airway opening, accelerating the aging of parts such as the burner and the liquid receiving tray, and easily causing serious safety accidents. Summary of the Invention

[0004] The purpose of the present invention is to solve at least one of the above problems and / or other problems existing in the prior art.

[0005] To achieve the above purpose, according to one aspect of the present invention, an inner fire cover is provided. The inner fire cover includes a fire cover main body and a partition. The projection of the fire cover main body along its axial direction is in a ring structure, and a plurality of fire groove groups are arranged at intervals along its circumferential direction on the top; the partition is connected to the middle of the fire cover main body, and the partition is provided with a first through hole for the ignition needle to pass through. The aperture of the first through hole is larger than the diameter of the ignition needle to form a gap between the partition and the ignition needle.

[0006] The inner burner cap of the present invention can appropriately reduce the gas flow area in the central region of the burner cap body by arranging a partition plate in the center of the burner cap body, increasing the resistance of the gas pressed by the cookware to flow downward along the central region of the burner cap body, thereby avoiding the aging of parts such as the burner and the liquid receiving tray caused by the downward pressure of unburned gas and improving safety. The gap between the second through hole of the partition plate and the ignition needle reduces the air replenishment flow area and accelerates the rapid passage of the secondary replenished air through the gap.

[0007] According to an embodiment of the present invention, the burner cap body includes a burner cap inner wall disposed on its inner side and extending along its axial direction, and at least one set of pressure relief holes is provided on the burner cap inner wall, and the partition plate is connected to the bottom of the burner cap inner wall away from the fire trough group. This structure can prevent the danger caused by excessive pressure due to the accumulation of gas after the fire trough group is blocked by oil stains.

[0008] According to an embodiment of the present invention, the burner cap body includes a burner cap top wall connected to the top of the burner cap inner wall and extending along its radial direction, the fire trough group is provided on the burner cap top wall, and an anti-fouling protrusion is provided on the burner cap inner wall on the side of the pressure relief hole close to the burner cap top wall. This structure can more effectively block the oil stains from flowing into the pressure relief holes along the burner cap inner wall.

[0009] According to an embodiment of the present invention, the number of the pressure relief holes is two groups, and the two groups of pressure relief holes are symmetrically arranged about the center axis of the burner cap body on the burner cap inner wall, and the two anti-fouling protrusions are arranged in one-to-one correspondence with the two groups of pressure relief holes.

[0010] According to an embodiment of the present invention, each fire trough group includes a main fire trough and a stable fire trough respectively extending along the radial direction of the burner cap top wall, and the stable fire trough is arranged on one side of the main fire trough.

[0011] According to an embodiment of the present invention, mounting holes for installing a thermocouple or an induction needle are provided on the side of the burner cap top wall close to the burner cap inner wall corresponding to between every two adjacent fire trough groups.

[0012] According to an embodiment of the present invention, a positioning plate is provided at one end of the burner cap inner wall connected to the partition plate, and the positioning plate extends along the axial direction of the burner cap inner wall and away from the fire trough group.

[0013] According to another aspect of the present invention, a burner is provided, which includes the above-mentioned inner burner cap, the flame dividing member is formed with an inner ring air passage in the middle thereof, a plurality of outer ring air passages circumferentially arranged around the inner ring air passage, and at least one air passage provided between two adjacent outer ring air passages, and a second through hole is provided at the top of the air passage; the partition plate covers the second through hole so that the air in the air passage can flow to the fire trough group through the gap.

[0014] According to an embodiment of the present invention, the air passage is disposed through the distributor in the radial direction thereof and passes through the inner annular air passage. The second through hole is coaxially disposed with the inner annular air passage. The number of the outer annular air passages is four, and two of the outer annular air passages are respectively disposed at intervals on both sides of the air passage.

[0015] According to an embodiment of the present invention, the air passage includes a first section and a second section which are arranged in central symmetry about the central axis of the second through hole and communicated with each other. Both the first section and the second section are in a horn shape, and the diameter of one of the first section and the second section gradually increases when extending away from the other. This structure can suck in more air and ensure that a sufficient amount of air flows through the gap to the fire trough group.

[0016] According to an embodiment of the present invention, a boss is disposed on the inner side wall of the inner annular air passage and extends radially inwardly thereof. The partition plate abuts against the boss, and the boss is provided with a positioning groove for inserting the positioning plate. This structure can prevent the relative rotation of the fire cap body and the distributor in the axial direction.

[0017] According to an embodiment of the present invention, the burner further includes a base, and the base is formed with an inner annular ejector tube communicated with the inner annular air passage and an outer annular ejector tube communicated with the outer annular air passage.

[0018] According to another aspect of the present invention, there is provided a cooker, which includes the inner fire cap or the burner as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The features and advantages of the present invention will be clearly understood through the following detailed description with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and thus should not be construed as limiting the present invention, wherein:

[0020] Figure 1 A perspective view of an inner fire cap showing an exemplary embodiment of the present invention is shown.

[0021] Figure 2 A perspective view of a burner showing an exemplary embodiment of the present invention is shown.

[0022] Figure 3 Shown Figure 2 An exploded view of the shown burner is shown.

[0023] Figure 4 Shown Figure 2 A top view of the shown burner is shown.

[0024] Figure 5 Shown Figure 4Cross-sectional view of the burner shown along line A-A.

[0025] Figure 6 Shown Figure 4 Cross-sectional view of the burner shown along line B-B.

[0026] Figure 7 Shown Figure 2 Three-dimensional view of the flame-dividing part of the burner shown.

[0027] Explanation of reference numerals:

[0028] 1. Fire cap body; 11. Fire groove group; 111. Main fire groove; 112. Flame-stabilizing fire groove; 12. Inner wall of fire cap; 121. Pressure relief hole; 122. Anti-pollution protrusion; 123. Positioning plate; 13. Top wall of fire cap; 131. Mounting hole; 14. Outer wall of fire cap; 2. Ignition needle; 3. Partition plate; 31. First through hole; 4. Gap; 5. Flame-dividing part; 51. Inner ring air duct; 511. Boss; 5111. Positioning groove; 52. Outer ring air duct; 53. Air passage; 531. Second through hole; 6. Base; 61. Inner ring injection pipe; 62. Outer ring injection pipe; 7. Outer fire cap. Detailed implementation mode

[0029] The embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, many specific details are set forth in order to enable those skilled in the art to more fully understand and implement the present invention. However, it is obvious to those skilled in the art that some of these specific details may not be required for the implementation of the present invention. In addition, it should be understood that the present invention is not limited to the specific embodiments described. On the contrary, any combination of the features and elements described below can be considered for implementing the present invention, regardless of whether they relate to different embodiments. Therefore, the aspects, features, embodiments, and advantages described below are for illustrative purposes only and should not be regarded as elements or limitations of the claims, unless expressly stated in the claims.

[0030] In the following text, terms such as "first", "second", etc. are used to describe the elements of the present application. These terms are only used to distinguish the various elements and not to limit the nature, order, or number of these elements. The terms "comprising" and "having" are used to indicate an open inclusion meaning and mean that there may be additional elements / components in addition to the listed elements / components.

[0031] Figure 1The inner burner cap according to an embodiment of the present invention is shown. The inner burner cap according to this embodiment includes a burner cap body 1 and a partition plate 3. The projection of the burner cap body 1 along its axial direction is in an annular structure, and an annular cavity structure for gas to flow through is formed inside the burner cap body 1. A plurality of burner slot groups 11 are arranged at intervals along the axial direction on the top of the burner cap body 1. The gas in the annular cavity structure can flow out of the burner cap body 1 through the burner slot groups 11, so as to form swirling flames on the top of the burner cap body 1. Air can flow through the middle of the burner cap body 1 to the burner slot groups 11 to supplement secondary air to the flames at the burner slot groups 11. The partition plate 3 is connected to the middle of the burner cap body 1 to block the middle of the annular burner cap body 1, and a first through hole 31 for the ignition needle 2 to pass through is opened on the partition plate 3. The aperture of the first through hole 31 is larger than the diameter of the ignition needle 2, so as to form a gap 4 between the partition plate 3 and the ignition needle 2. The partition plate 3 can appropriately reduce the gas flow area in the central area of the burner cap body 1, increase the resistance of the gas pressed down by the cookware to flow along the central area of the burner cap body 1 to the bottom, thereby avoiding the aging of parts such as the burner and the liquid receiving tray caused by the downward pressure of incompletely burned gas and improving safety. Compared with the prior art, the gap 4 between the partition plate 3 and the ignition needle 2 reduces the air supplement flow area and can also accelerate the rapid passage of the secondary supplementary air through the gap 4.

[0032] According to a specific exemplary embodiment of the burner cap body 1, as Figure 1 shown, the burner cap body 1 mainly includes a burner cap outer wall 14, a burner cap top wall 13 and a burner cap inner wall 12 that are sequentially connected from outside to inside along its radial direction. Among them, the burner cap inner wall 12 and the outer edge of the burner cap extend along approximately the axial direction of the burner cap body 1, and the burner cap top wall 13 extends from the top edge of the burner cap outer wall 14 to the top edge of the burner cap inner wall 12 along approximately the radial direction of the burner cap body 1, so that the cross-section of the burner cap body 1 is approximately an inverted "U" shape.

[0033] Specifically, in combination with Figure 1 and Figure 2, at least one set of pressure relief holes 121 are provided on the inner wall 12 of the burner cap to reintroduce the unburned gas into the annular cavity structure, preventing danger caused by excessive pressure due to the blockage of the fire trough group 11 by oil stains and the resulting gas accumulation. The partition plate 3 is connected to the bottom of the inner wall 12 of the burner cap away from the fire trough group 11 (or it can be the bottom on the side of the inner wall 12 of the burner cap away from the top wall 13 of the burner cap), so that the pressure relief holes 121 can be arranged in the effective pressure relief area between the fire trough group 11 and the partition plate 3. In a further exemplary embodiment, in order to more effectively prevent oil stains from flowing into the pressure relief holes 121 along the inner wall 12 of the burner cap, an anti-pollution protrusion 122 is provided on the side of the pressure relief holes 121 close to the top wall 13 of the burner cap (or it can be the side of the inner wall 12 of the burner cap close to the fire trough group 11). The anti-pollution protrusion 122 extends radially inwards along the burner cap body 1 by a certain distance, so that the oil stains can flow towards the partition plate 3 along the inner edge of the anti-pollution protrusion 122. It can be understood that in this embodiment, only the method of providing the pressure relief holes 121 on the inner wall 12 of the burner cap is listed for pressure relief. In practical applications, it includes but is not limited to this. It can also be to provide corresponding pressure relief components on the partition plate 3 or other positions, as long as it can relieve the pressure of the central area of the burner cap body 1 in a timely manner.

[0034] As a preferred exemplary embodiment of the pressure relief holes 121 and the anti-pollution protrusions 122, as Figure 2 and Figure 5 shown, the number of the pressure relief holes 121 is two groups, and the number of each group of pressure relief holes 121 is three. The two groups of pressure relief holes 121 are symmetrically arranged on the inner wall 12 of the burner cap with respect to the center axis of the burner cap body 1. The two anti-pollution protrusions 122 are respectively arranged corresponding to the two groups of pressure relief holes 121, which is sufficient to meet the pressure relief needs of the burner cap body 1. In some other specific exemplary embodiments, the number of the pressure relief holes 121 can also be one group, two groups or more groups, and the number of each group of pressure relief holes 121 can also be set according to the actual situation, such as the diameter of the pressure relief holes 121, the pressure value to be considered for unloading, etc.

[0035] As a specific exemplary embodiment of the fire trough group 11, as Figure 1As shown in the figure, the inner part of the top wall 13 of the burner cap is inclined towards the baffle 3, and the outer part of the top wall 13 of the burner cap extends along the radial direction of the burner cap body 1. The inner end of each fire trough group 11 penetrates through the inner part to the inner wall 12 of the burner cap, and the air flowing upward from the gap 4 supplements secondary air to the flame at the inner end of the fire trough group 11. The outer end of each fire trough group 11 extends to be close to the outer wall 14 of the burner cap or penetrates through to the outer wall 14 of the burner cap, and the air outside the inner burner cap can directly supplement secondary air to the outer end of the fire trough group 11, so that the flame at the fire trough group 11 is brighter and clearer. Each fire trough group 11 may include a main fire trough 111 and a secondary fire trough 112 that respectively extend along the radial direction of the top wall 13 of the burner cap. The width of the main fire trough 111 is larger, and it can be arranged along the radial direction of the burner cap body 1 or in a spiral shape. After the gas is ignited through the main fire trough 111, a spiral swirling flame is generated. The width of the secondary fire trough 112 is smaller than that of the main fire trough 111, and it is arranged on one side of the main fire trough 111, which can solve the problem of flame lift of the main fire trough 111.

[0036] In a further embodiment, as Figure 1 shown, on the side of the top wall 13 of the burner cap close to the inner wall 12 of the burner cap, mounting holes 131 for installing a thermocouple or an induction needle are provided corresponding to each adjacent two groups of fire trough groups 11. In some other specific embodiments, when the thermocouple or the induction needle is not installed, the mounting hole 131 can also be used as an auxiliary fire hole of the fire trough group 11 to help increase the heat load. It can be understood that the heat load refers to the maximum heat released during the combustion of gas in the gas stove, and it is also the power that the gas can output.

[0037] The present invention also provides a burner including the above-mentioned inner burner cap. Figures 2 to 6The specific structure of the burner is shown, mainly including a flame dividing member 5, an outer flame cover 7, and the inner flame covers listed in each of the above embodiments. As an exemplary embodiment of the flame dividing member 5, the flame dividing member 5 is formed with an inner ring air passage 51 located in the middle thereof, a plurality of outer ring air passages 52 circumferentially disposed around the inner ring air passage 51, and at least one air passage 53 disposed between two adjacent outer ring air passages 52. The outer end of the air passage 53 extends to the periphery of the flame dividing member 5, and the inner end of the air passage 53 can extend to the middle of the flame dividing member 5 and is isolated and communicated with the inner ring air passage 51. By providing a second through hole 531 that is coaxial with but not communicated with the inner ring air passage 51 at a position corresponding to the center of the inner ring air passage 51 at the top of the air passage 53, when the burner main body 1 is covered on the inner ring air passage 51 so that the annular cavity structure can be communicated with the inner ring air passage 51, the partition plate 3 is covered on the second through hole 531, so that the air in the air passage 53 can flow to the fire trough group 11 through the second through hole 531 and the gap 4 at the first through hole 31. When the gas burns at the fire trough group 11, the gas temperature near the center of the flame dividing member 5 is relatively high, and the gas is heated and flows toward the side where the fire trough group 11 is located. The pressure at the top of the central region of the burner main body 1 is greater than the pressure at the bottom, forming a pressure difference. At this time, the separate air passage 53 can quickly suck in air and supplement secondary air to the inner end of the fire trough group 11 through the second through hole 531 and the gap 4, making the combustion of the gas more complete. It can be understood that the cross section of the inner ring air passage 51 is circular and has an inner side wall and an outer side wall, so as to form a passage for the gas to flow between the inner side wall and the outer side wall, so that the middle position of the inner ring air passage 51 is hollow, facilitating the second through hole 531 of the air passage 53 to communicate with the middle region of the burner main body 1 at this middle position.

[0038] Further, as Figure 7 shown, this embodiment mainly shows that four outer ring air passages 52 are circumferentially and equally spaced around the periphery of the flame dividing member 5. Each outer ring air passage 52 is fan-shaped, and there is a certain distance between every two adjacent outer ring air passages 52. The air passage 53 extends through the flame dividing member 5 radially between two adjacent outer ring air passages 52, thereby forming two sections of air passages 53 on both sides of the inner ring air passage 51 symmetrically along the radial direction (which is also both sides of the second through hole 531), further increasing the air flow rate at the gap 4 and ensuring that the maximum amount of air can be supplemented at the inner end of the gas trough group. In some other specific embodiments, the number of the outer ring air passages 52 can also be two, three or even more. Each outer ring air passage 52 is also fan-shaped and is arranged along the periphery of the flame dividing member 5, and there is a distance between two adjacent outer ring air passages 52 and an air passage 53 is provided. Each air passage 53 formed on the flame dividing member 5 converges radially inward to the center of the inner ring air passage 51, and a second through hole 531 is opened at the top of the converging position.

[0039] In a further exemplary embodiment of the air passage 53, the air passage 53 includes a first section and a second section that are centrally symmetrically arranged about the central axis of the second through hole 531 and are connected. Both the first section and the second section are trumpet-shaped. Among them, the diameter of the first section gradually increases when extending in the direction away from the second section, and the diameter of the second section also gradually increases when extending in the direction away from the first section. The first section and the second section converge at the central position of the inner ring air passage 51 after passing through the inner ring air passage 51. The trumpet-shaped first section and second section can further accelerate the speed of the inhaled air.

[0040] To prevent the air in the air passage 53 from flowing more effectively to the inner end of the fire trough group 11, a boss 511 extending radially inward along the inner side wall of the inner ring air passage 51 can also be provided. As Figure 6 and Figure 7 shown, the boss 511 is annular and extends circumferentially along the inner side wall of the inner ring air passage 51. A positioning groove 5111 is provided on one side of the annular boss 511. The bottom of the inner wall 12 of the burner cap (that is, the end connected to the partition 3) is provided with a positioning plate 123. The positioning plate 123 extends axially along the inner wall 12 of the burner cap and toward the side away from the fire trough group 11 (that is, the top wall 13 of the burner cap). When the burner cap body 1 is covered on the inner ring air passage 51, the partition 3 can abut against the boss 511, so that the air in the air passage 53 can only flow to the inner end of the fire trough group 11 through the second through hole 531 and the gap 4, and the relative rotation of the burner cap body 1 and the sub-fire element 5 in the axial direction can also be prevented through the positioning groove 5111 and the positioning plate 123. It can be understood that in some other specific embodiments, for the axial limit of the burner cap body 1 and the sub-fire element 5, a limit structure can also be provided at other positions, including but not limited to providing a positioning plate 123 at the bottom of the inner wall 12 of the burner cap and providing a positioning groove 5111 on one side of the boss 511.

[0041] In a further exemplary embodiment of the burner, as Figures 2 to 6 shown, the burner further includes a base 6. The base 6 is formed with an inner ring injection pipe 61 communicating with the inner ring air passage 51 and an outer ring injection pipe 62 communicating with the outer ring air passage 52. The outer burner cap 7 has an outer fire trough and is covered on the top of the outer ring air passage 52 so that the inner cavity of the outer burner cap 7 communicates with the top of each outer ring air passage 52. The inner burner cap is covered on the top of the inner ring air passage 51 and its internal annular cavity structure communicates with the top of the inner ring air passage 51. The bottom of the outer ring air passage 52 communicates with the outer ring injection pipe 62, and the bottom of the inner ring air passage 51 communicates with the inner ring injection pipe 61. Thus, after the gas enters the outer ring injection pipe 62, it flows through the outer ring air passage 52 and the outer burner cap 7 in sequence and burns at the outer fire trough. At the same time, after the gas enters the inner ring injection pipe 61, it flows through the inner ring air passage 51 and the inner burner cap in sequence and burns at the fire trough group 11.

[0042] The present invention also provides a cooking appliance including the above inner fire cover or burner.

[0043] For those skilled in the art, various modifications and variations can be made to the embodiments disclosed above without departing from the scope or spirit of the present invention. Based on the practice of the present invention disclosed in this specification, other embodiments of the present invention will be apparent to those skilled in the art. This specification and the examples disclosed therein should be considered merely illustrative, and the true scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An inner fire cover, characterized in that, Comprising: A burner cap body (1), the projection of the burner cap body (1) along its axial direction is in a ring structure, and a plurality of burner groove groups (11) are arranged at intervals along its circumferential direction on the top; and A partition plate (3), the partition plate (3) is connected to the middle of the burner cap body (1), the partition plate (3) is provided with a first through hole (31) for the ignition needle (2) to pass through, and the aperture of the first through hole (31) is larger than the diameter of the ignition needle (2) to form a gap (4) between the partition plate (3) and the ignition needle (2); The burner cap body (1) includes a burner cap inner wall (12) located inside the ring structure and extending along its axial direction, and at least one set of pressure relief holes (121) is provided on the burner cap inner wall (12), and the partition plate (3) is connected to the bottom of the burner cap inner wall (12) away from the burner groove group (11); The burner cap body (1) includes a burner cap top wall (13) connected to the top of the burner cap inner wall (12) and extending along its radial direction, the burner groove group (11) is arranged on the burner cap top wall (13), and the burner cap inner wall (12) is provided with an anti-fouling protrusion (122) on the side of the pressure relief hole (121) close to the burner cap top wall (13); The number of the pressure relief holes (121) is two groups, the number of each group of pressure relief holes (121) is three, and the two groups of pressure relief holes (121) are symmetrically arranged on the burner cap inner wall (12) with the center axis of the burner cap body (1) as the symmetry axis, and the two anti-fouling protrusions (122) are arranged in one-to-one correspondence with the two groups of pressure relief holes (121); Each burner groove group (11) includes a main burner groove (111) and a stable flame burner groove (112) respectively extending along the radial direction of the burner cap top wall (13), and the stable flame burner groove (112) is arranged on one side of the main burner groove (111).

2. The inner fire cap according to claim 1, characterized in that, On the side of the burner cap top wall (13) close to the burner cap inner wall (12), mounting holes (131) for installing a thermocouple or an induction needle are arranged corresponding to the positions between every two adjacent burner groove groups (11).

3. The inner burner cap according to any one of claims 1 to 2, characterized in that One end of the burner cap inner wall (12) connected to the partition plate (3) is provided with a positioning plate (123), and the positioning plate (123) extends along the axial direction of the burner cap inner wall (12) and towards the side away from the burner groove group (11).

4. A burner, characterized in that, Comprising: A flame distributing member (5), the flame distributing member (5) is formed with an inner ring air passage (51) located in the middle thereof, a plurality of outer ring air passages (52) arranged circumferentially around the inner ring air passage (51), and at least one air passage (53) arranged between two adjacent outer ring air passages (52), and a second through hole (531) is provided at the top of the air passage (53); and The inner burner cap according to claim 3, the partition plate (3) covers the second through hole (531) so that the air in the air passage (53) can flow towards the burner groove group (11) through the gap (4).

5. The burner according to claim 4, characterized in that, The air passage (53) is arranged through the distributor (5) in the radial direction and passes through the inner annular air passage (51). The second through hole (531) is coaxially arranged with the inner annular air passage (51). The number of the outer annular air passages (52) is four, and two of the outer annular air passages (52) are respectively arranged at intervals on both sides of the air passage (53).

6. The burner according to claim 5, characterized in that, The air passage (53) includes a first section and a second section which are arranged in central symmetry about the central axis of the second through hole (531) and are communicated with each other. Both the first section and the second section are in a horn shape, and the diameter of one of the first section and the second section gradually increases when extending away from the other one.

7. The burner according to claim 4, characterized in that, A boss (511) is arranged on the inner side wall of the inner annular air passage (51) and extends inwards along the radial direction thereof. The partition plate (3) abuts against the boss (511), and a positioning groove (5111) for inserting the positioning plate (123) is formed in the boss (511).

8. The burner according to claim 4, characterized in that, The burner further includes a base (6). The base (6) is formed with an inner annular ejector pipe (61) communicated with the inner annular air passage (51) and an outer annular ejector pipe (62) communicated with the outer annular air passage (52).

9. A cooking appliance, characterized in that, It includes the inner fire cap according to any one of claims 1 to 3 or the burner according to any one of claims 4 to 8.

Images