Outer fire cover, combustor and gas stove

Abstract

The invention discloses an outer fire cover, a combustor and a gas stove. The outer fire cover comprises an outer fire cover body and a plurality of outer fire holes formed in the outer fire cover body, the outer fire holes are formed in the outer fire cover body in the circumferential direction of the fire cover body and comprise the first outer fire holes and the second outer fire holes, and the outer fire cover body is provided with a first area and a second area. The first outer fire hole is formed in the first area, the second outer fire hole is formed in the second area, and the diameter of the first outer fire hole is smaller than that of the second outer fire hole. The outer fire cover is simple and compact in structure, and flame combustion of outer ring fire is uniform.

Description

Technical Field

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

[0002] In some existing burners, the outer ring gas delivery channel and the inner ring gas delivery channel are independently arranged. That is to say, the outer ring gas pipe is communicated with the outer ring gas chamber, so as to supply gas to the outer fire holes, and the inner ring gas pipe is communicated with the inner ring gas chamber, so as to supply gas to the inner fire holes. In this structure, generally, a flow guiding piece needs to be arranged between the outer ring gas pipe and the outer ring gas chamber, so that the gas flowing out from the outer ring gas pipe to the outer ring gas chamber can be evenly distributed to each outer fire hole, thereby improving the combustion uniformity of the outer ring fire. The structure is relatively complex, the installation is inconvenient, and the cost is relatively high.

[0003] Therefore, there is an urgent need for an outer fire cover to solve the above problems. Summary of the Invention

[0004] The present invention aims to solve at least one of the problems existing in the related art to some extent. For this purpose, the present invention provides an outer fire cover with a simple and compact structure, and the flame combustion of the outer ring fire is relatively uniform.

[0005] The above object is achieved by the following technical solutions:

[0006] An outer fire cover includes an outer fire cover body and a plurality of outer fire holes formed in the outer fire cover body. The plurality of outer fire holes are arranged along the circumferential direction of the fire cover body. The outer fire holes include first outer fire holes and second outer fire holes. A first area and a second area are provided on the outer fire cover body. The first outer fire holes are arranged in the first area, the second outer fire holes are arranged in the second area, and the diameter of the first outer fire holes is smaller than the diameter of the second outer fire holes.

[0007] Optionally, the first area includes a first partial area and a second partial area. The center of the first area is the origin. Taking the origin as the center of a circle, the area within a diameter of 1 is the first partial area. Taking the origin as the center of a circle, the area from a diameter of to a diameter of is the second partial area. The diameter of the first outer fire holes located in the first partial area is smaller than the diameter of the first outer fire holes located in the second partial area.

[0008] Optionally,

[0009] Optionally, within the second partial area, along the direction away from the origin, the diameters of the plurality of first outer fire holes increase in sequence.

[0010] Optionally, centered at the origin, at least two separate regions are sequentially arranged from the inside to the outside in the second local region, and the first outer flame holes are arranged in each of the separate regions. Among the first outer flame holes in two adjacent separate regions, the diameter of the first outer flame hole in the separate region closer to the origin is d1, and the diameter of the first outer flame hole in the separate region farther from the origin is d2, where d1 < d2.

[0011] Optionally, at least two first outer flame holes are arranged in the separate region.

[0012] Optionally, an annular slit flame hole is further formed on the outer flame cover body inside the outer flame hole.

[0013] Optionally, the upper side surface of the outer flame cover body includes an outer side surface and an inner side surface located inside the outer side surface. The outer side surface is inclined downward from the inside to the outside, and the inner side surface is inclined downward from the outside to the inside. The outer flame hole is formed on the outer side surface, and the annular slit flame hole is formed on the inner side surface.

[0014] On the other hand, the present invention provides a burner, which includes a flame distributor, an outer ring gas pipeline, and the above-mentioned outer flame cover. The outer flame cover is covered on the upper side of the flame distributor. The flame distributor includes a flame distributor body, and an outer ring gas groove with an upward opening and communicating with the outer flame hole is formed on the flame distributor body. The outer ring gas pipeline is installed vertically at the lower part of the flame distributor and communicates with the outer ring gas groove. The outer ring gas pipeline is located in the orthographic projection of the first region in the vertical direction, and the central axis of the outer ring gas pipeline is collinear with the origin located at the center of the first region.

[0015] Optionally, the inner diameter of the outer ring gas pipeline is 30 mm - 35 mm.

[0016] Optionally, an inner flame cover and an inner ring gas pipeline are further included. The inner flame cover is arranged inside the outer flame cover. The inner flame cover includes an inner flame cover body and a plurality of inner flame holes. The plurality of inner flame holes are arranged along the circumferential direction of the inner flame cover body. An inner ring gas groove with an upward opening and communicating with the inner flame hole is further formed on the flame distributor. The inner ring gas groove is located inside the outer ring gas groove. The inner ring gas pipeline is installed vertically at the lower part of the flame distributor and communicates with the inner ring gas groove.

[0017] Optionally, a secondary air channel is formed by arranging the outer flame cover and the inner flame cover at intervals. The distance between the outer side of the outer flame hole and the outer side of the inner flame hole is a, where 32 mm ≤ a ≤ 40 mm. The distance between the outer side of the annular slit flame hole formed on the outer flame cover body inside the outer flame hole and the outer side of the inner flame hole is b, where 25 mm ≤ b ≤ 32 mm.

[0018] In another aspect, the present invention provides a gas stove, including the above burner.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] The outer fire cover provided by the present invention includes an outer fire cover body and a plurality of outer fire holes opened on the outer fire cover body. The plurality of outer fire holes are arranged along the circumferential direction of the fire cover body. The outer fire holes include a first outer fire hole and a second outer fire hole. A first area and a second area are provided on the outer fire cover body. The first outer fire hole is arranged in the first area, and the second outer fire hole is arranged in the second area. The diameter of the first outer fire hole is smaller than that of the second outer fire hole. During specific installation, the outer fire cover is installed on the burner's air distributor. An outer ring air groove communicating with the outer fire holes is opened on the air distributor. A vertically arranged outer ring gas pipe is installed at the lower end of the air distributor. The outer ring gas pipe communicates with the outer ring air groove, and the outer ring gas pipe is located at the central position of the first area. The gas input into the outer ring air groove by the outer ring gas pipe has a relatively large air pressure. At this time, since the diameter of the first outer fire hole in the first area in this embodiment is smaller than that of the first outer fire hole in the second area, more gas can flow along the outer ring air groove to the first outer fire hole in the second area, thereby realizing the pressure division and diversion of the gas, making the flames at each outer fire hole more uniform. Compared with the prior art method of using a flow guide plate to achieve gas flow diversion and pressure division, the structure is simpler and more compact. Description of the Drawings

[0021] Figure 1 is a three-dimensional structural schematic diagram of the burner provided by a specific embodiment of the present invention;

[0022] Figure 2 is Figure 1 exploded view of;

[0023] Figure 3 is Figure 1 top view of;

[0024] Figure 4 is Figure 3 cross-sectional view taken along line A-A in;

[0025] Figure 5 is the front view of the burner provided by a specific embodiment of the present invention after removing the air distributor;

[0026] Figure 6 is Figure 5 cross-sectional view taken along line B-B in.

[0027] In the figure:

[0028] 1. Outer fire cap; 11. Outer fire cap body; 111. Inner side; 112. Outer side; 12. Outer fire holes; 121. First outer fire hole; 122. Second outer fire hole; 13. Ring slot; 131. Ring slot fire hole

[0029] 2. Inner fire cap; 21. Inner fire cap body; 22. Inner fire holes

[0030] 3. Divider; 31. Divider body; 32. Outer ring air groove; 33. Inner ring air groove

[0031] 41. Outer ring ejector tube; 42. Inner ring ejector tube

[0032] 51. Outer ring gas pipeline; 52. Inner ring gas pipeline

[0033] 100. Secondary air channel; 200. Origin; 300. Central axis; 400. First local area; 500. Second local area; 501. Separate area Detailed implementation mode

[0034] The following embodiments illustrate the present invention, but the present invention is not limited by these embodiments. Modifying the specific implementation mode of the present invention or equivalently replacing some technical features without departing from the spirit of the present invention scheme shall be covered within the scope of the technical solution claimed by the present invention

[0035] Please refer to Figures 1 - 6 , the present invention provides an outer fire cap, including an outer fire cap body 11 and a plurality of outer fire holes 12 opened on the outer fire cap body 11. The plurality of outer fire holes 12 are arranged along the circumferential direction of the fire cap body. The outer fire holes 12 include a first outer fire hole 121 and a second outer fire hole 122. A first area and a second area are provided on the outer fire cap body 11. The first outer fire hole 121 is arranged in the first area, and the second outer fire hole 122 is arranged in the second area. The diameter of the first outer fire hole 121 is smaller than that of the second outer fire hole 122. During specific installation, the outer fire cap 1 is installed on the divider 3 of the burner. An outer ring air groove 32 communicated with the outer fire holes 12 is opened on the divider 3. An outer ring gas pipeline 51 arranged vertically is installed at the lower end of the divider 3. The outer ring gas pipeline is communicated with the outer ring air groove 32, and the outer ring gas pipeline 51 is located at the central position of the first area. The gas input into the outer ring air groove 32 by the outer ring gas pipeline 51 has a relatively high air pressure. At this time, since the diameter of the first outer fire hole 121 in the first area in this embodiment is smaller than that of the first outer fire hole 121 in the second area, more gas can flow along the outer ring air groove 32 to the first outer fire hole 121 in the second area, thereby realizing the pressure division and diversion of the gas, making the flames at each outer fire hole 12 more uniform. Compared with the prior art method of using a flow guiding piece to realize the gas flow guiding and pressure division, the structure is simpler and more compact

[0036] In this embodiment, the diameters of the first outer flame holes 121 are all 2.3 mm, and the diameters of the second outer flame holes 122 are all 2.7 mm.

[0037] Of course, the diameters of the multiple first outer flame holes 121 can also be different. Optionally, the first region includes a first partial region 400 and a second partial region 500. The center of the first region is the origin 200. With the origin 200 as the center of the circle, the diameter is The region within the range is the first partial region 400. With the origin 200 as the center of the circle, the diameter is To the diameter of The region within the range is the second partial region 500. The diameter of the first outer flame holes 121 located within the first partial region 400 is smaller than the diameter of the first outer flame holes 121 located within the second partial region 500.

[0038] Preferably, Is the inner diameter of the outer ring gas pipeline 51.

[0039] Since the inner diameter of the outer ring gas pipeline 51 in this embodiment is 32 mm, that is Is 32 mm. To ensure the uniform distribution of the outer ring flame, optionally,

[0040] Exemplarily, in this embodiment, Is 70 mm.

[0041] In one implementation manner of this embodiment, optionally, within the second partial region 500, along the direction away from the origin 200, the diameters of the multiple first outer flame holes 121 increase in sequence.

[0042] In another implementation manner of this embodiment, optionally, with the origin 200 as the center, the second partial region 500 is sequentially provided with at least two separated regions 501 from the inside to the outside. The first outer flame holes 121 are all arranged in the separated regions 501. Among the first outer flame holes 121 of two adjacent separated regions 501, the diameter of the first outer flame hole 121 in the separated region 501 close to the origin 200 is d1, and the diameter of the first outer flame hole 121 in the separated region 501 far from the origin 200 is d2, and d1 < d2.

[0043] Specifically, in this implementation manner, there are three separated regions 501. Among them, with the origin 200 as the center, the diameter is To the diameter of The region within the range is the first separated region 501. With the origin 200 as the center, the diameter is To the diameter of The area within the range is the second sub - area 501, centered on the origin 200, with a diameter of to a diameter of The area within the range is the second sub - area 501.

[0044] Optionally, there are at least two first outer flame holes 121 in the sub - area 501.

[0045] Optionally, a ring - shaped slit flame hole 131 is also provided on the outer flame cover body 11 inside the outer flame hole 12. By providing the ring - shaped slit flame hole 131, there is also a ring - shaped slit flame between the outer ring flame and the inner ring flame, thereby increasing the uniformity of the flame of the burner and having better thermal uniformity.

[0046] Optionally, the upper side surface of the outer flame cover body 11 includes an outer side surface 112 and an inner side surface 111 located inside the outer side surface 112. The outer side surface 112 is inclined downward from inside to outside, and the inner side surface 111 is inclined downward from outside to inside. The outer flame hole 12 is opened on the outer side surface 112, and the ring - shaped slit flame hole 131 is opened on the inner side surface 111. On the one hand, it is beneficial for the opening operation of the outer flame hole 12 and the ring - shaped slit flame hole 131, so that the opening tool can be perpendicular to the outer side surface 112 or the inner side surface 111 to open the outer flame hole 12 and the ring - shaped slit flame hole 131. On the other hand, it is also beneficial for the secondary air to flow upward along the inclined inner side surface 111 to the ring - shaped slit flame hole 131 to improve the combustion efficiency of the ring - shaped slit flame hole 131. On the third hand, it can also ensure that the ring - shaped slit flame at the ring - shaped slit flame hole 131 does not interfere with the outer ring flame at the outer flame hole 12.

[0047] Optionally, a ring - shaped slit groove 13 with an upward opening is provided on the outer flame cover body 11. The ring - shaped slit groove 13 is arranged inside the outer flame hole 12, and the ring - shaped slit flame hole 131 is opened at the bottom of the ring - shaped slit groove 13. By providing the ring - shaped slit groove 13, the flame at the ring - shaped slit flame hole 131 is more stable, and the ring - shaped slit groove 13 has a flame - stabilizing effect.

[0048] Furthermore, to further ensure that the outer ring flame and the ring - shaped slit flame do not interfere, the ring - shaped slit groove 13 is inclined inward from bottom to top, so that the ring - shaped slit flame can further deviate from the outer ring flame.

[0049] On the other hand, the present invention provides a burner, including a flame distributor 3, an outer ring gas pipeline 51, and the above - mentioned outer flame cover 1. The outer flame cover 1 is covered on the upper side of the flame distributor 3. An outer ring gas groove 32 with an upward opening and communicating with the outer flame hole 12 is provided on the flame distributor 3. The outer ring gas pipeline 51 is installed vertically at the lower part of the flame distributor 3 and communicates with the outer ring gas groove 32. The outer ring gas pipeline 51 is located in the orthographic projection of the first area in the vertical direction, and the central axis 300 of the outer ring gas pipeline 51 is collinear with the origin 200 located at the center of the first area.

[0050] Optionally, the inner diameter of the outer ring gas delivery pipe 51 is 30 mm - 35 mm. In this embodiment, the inner diameter of the outer ring gas delivery pipe 51 is 32 mm.

[0051] Optionally, it further includes an inner fire cap 2 and an inner ring gas delivery pipe 52. The inner fire cap 2 is arranged inside the outer fire cap 1. The inner fire cap 2 includes an inner fire cap body 21 and a plurality of inner fire holes 22. The plurality of inner fire holes 22 are arranged along the circumferential direction of the inner fire cap body 21. An inner ring gas groove 33 with an upward opening and communicating with the inner fire holes 22 is further formed on the flame distributor 3. The inner ring gas groove 33 is located inside the outer ring gas groove 32. The inner ring gas delivery pipe 52 is installed vertically at the lower part of the flame distributor 3 and communicates with the inner ring gas groove 33.

[0052] Optionally, a secondary air channel 100 is formed by spacing between the outer fire cap 1 and the inner fire cap 2. The secondary air at the secondary air channel 100 flows upward along the inner side surface 111 to the annular slit fire holes 131. The distance between the outer side of the outer fire holes 12 and the outer side of the inner fire holes 22 is a, and 32 mm ≤ a ≤ 40 mm. The distance between the outer side of the annular slit fire holes 131 located inside the outer fire holes 12 on the outer fire cap body 11 and the outer side of the inner fire holes 22 is b, and 25 mm ≤ b ≤ 32 mm, so that the outer ring flame and the inner ring flame are close but do not interfere with each other, and the annular slit flame and the inner ring flame do not interfere with each other either, and more secondary air can be entrained from the secondary air channel 100, making the flue gas lower, thereby improving the combustion efficiency.

[0053] Exemplarily, in this embodiment, a is 35 mm and b is 28 mm, which can better control that the inner ring flame, the outer ring flame and the slit flame do not interfere with each other.

[0054] Optionally, it further includes an outer ring ejector pipe 41 and an inner ring ejector pipe 42. The inner ring ejector pipe 42 communicates with the inner ring gas delivery pipe 52, and the outer ring ejector pipe 41 communicates with the outer ring gas delivery pipe 51.

[0055] On the other hand, the present invention provides a gas stove, including the above burner.

[0056] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. An outer burner cap, characterized in that, It includes an outer burner cap body (11) and a plurality of outer burner holes (12) opened on the outer burner cap body (11). The plurality of outer burner holes (12) are arranged along the circumferential direction of the burner cap body (11). The outer burner holes (12) include a first outer burner hole (121) and a second outer burner hole (122). A first area and a second area are provided on the outer burner cap body (11). The first outer burner hole (121) is arranged in the first area, and the second outer burner hole (122) is arranged in the second area. The diameter of the first outer burner hole (121) is smaller than the diameter of the second outer burner hole (122).

2. The outer burner cap according to claim 1, characterized in that, The first region includes a first local region (400) and a second local region (500). The center of the first region is the origin (200). With the origin (200) as the center of a circle, the region within a diameter of is the first local region. With the origin (200) as the center of a circle, the region from a diameter of to a diameter of is the second local region. The diameter of the first outer flame holes (121) located within the first local region is smaller than the diameter of the first outer flame holes (121) within the second local region.

3. The outer burner cap according to claim 2, characterized in that, 4. The outer burner cap according to claim 2, characterized in that, In the second local area (500), along the direction away from the origin (200), the diameters of the plurality of first outer burner holes (121) increase in sequence.

5. The outer burner cap according to claim 2, characterized in that, Centered on the origin (200), at least two separate areas (501) are sequentially arranged from the inside to the outside in the second local area. The first outer burner holes (121) are arranged in each of the separate areas (501). Among the first outer burner holes (121) of two adjacent separate areas (501), the diameter of the first outer burner hole (121) in the separate area (501) close to the origin (200) is d1, and the diameter of the first outer burner hole (121) in the separate area (501) away from the origin (200) is d2, and d1 < d2.

6. The outer burner cap according to claim 5, characterized in that, There are at least two first outer burner holes (121) in the separate area (501).

7. The outer burner cap according to any one of claims 1-6, characterized in that, A ring-shaped slit burner hole (131) is also opened on the outer burner cap body (11) inside the outer burner holes (12).

8. The outer burner cap according to claim 7, characterized in that, The upper side surface of the outer burner cap body (11) includes an outer side surface (112) and an inner side surface (111) located inside the outer side surface (112). The outer side surface (112) is inclined downward from the inside to the outside, and the inner side surface (111) is inclined downward from the outside to the inside. The outer burner holes (12) are opened on the outer side surface (112), and the ring-shaped slit burner hole (131) is opened on the inner side surface (111).

9. A burner, characterized in that, It includes a distributor (3), an outer ring gas pipeline (51), and the outer burner cap (1) according to any one of claims 1-8. The outer burner cap (1) is covered on the upper side of the distributor (3). The distributor (3) includes a distributor body (31). An outer ring gas groove (32) with an upward opening and communicating with the outer burner holes (12) is opened on the distributor body (31). The outer ring gas pipeline (51) is installed vertically at the lower part of the distributor (3) and communicates with the outer ring gas groove (32). The outer ring gas pipeline (51) is located in the orthographic projection of the first area in the vertical direction, and the central axis (300) of the outer ring gas pipeline (51) is collinear with the origin (200) at the center of the first area.

10. The burner according to claim 9, characterized in that, The inner diameter of the outer ring gas pipeline (51) is 30mm - 35mm.

11. The burner according to claim 9, characterized in that, It further includes an inner fire cap (2) and an inner ring gas pipeline (52). The inner fire cap (2) is arranged inside the outer fire cap (1). The inner fire cap (2) includes an inner fire cap body (21) and a plurality of inner fire holes (22). The plurality of inner fire holes (22) are arranged along the circumferential direction of the inner fire cap body (21). An inner ring gas groove (33) with an upward opening and communicating with the inner fire holes (22) is further formed on the fire distributor (3). The inner ring gas groove (33) is located inside the outer ring gas groove (32). The inner ring gas pipeline (52) is installed at the lower part of the fire distributor (3) in the vertical direction and communicates with the inner ring gas groove (33).

12. The burner according to claim 11, characterized in that, A secondary air channel (100) is formed by arranging the outer fire cap (1) and the inner fire cap (2) at intervals. The distance between the outer side of the outer fire hole (12) and the outer side of the inner fire hole (22) is a, and 32mm ≤ a ≤ 40mm. The distance between the outer side of the annular slit fire hole (131) located inside the outer fire hole (12) on the outer fire cap body (11) and the outer side of the inner fire hole (22) is b, and 25mm ≤ b ≤ 32mm.

13. A gas stove, characterized in that, It includes a burner according to any one of claims 9-12.

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