CN110594735A - Outer ring fire lid and combustor - Google Patents
Outer ring fire lid and combustor Download PDFInfo
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- CN110594735A CN110594735A CN201910881297.XA CN201910881297A CN110594735A CN 110594735 A CN110594735 A CN 110594735A CN 201910881297 A CN201910881297 A CN 201910881297A CN 110594735 A CN110594735 A CN 110594735A
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- end surface
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- holes
- inner end
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 76
- 230000002093 peripheral effect Effects 0.000 claims description 30
- 239000007789 gas Substances 0.000 description 27
- 239000000779 smoke Substances 0.000 description 12
- 239000000126 substance Substances 0.000 description 12
- 239000002245 particle Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009246 food effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Abstract
The invention relates to an outer ring fire cover and a combustor. Because the total area of the fire holes on the outer end surface is 1.5-3 times of that on the inner end surface, the ratio of the curvature radii of the inner end surface and the outer end surface is 0.3-0.8, the fire holes on the outer end surface are outwards arranged, the fire holes on the inner end surface are inwards arranged, and the outer end surface and the inner end surface are both provided with more than two rows of fire holes, so that a large-area high-temperature combustion area can be realized, more fire holes can be arranged on the outer ring fire cover with the same diameter size, equivalently, the heat exchange area is increased, the heat efficiency is improved, and the gas combustion is more sufficient. In addition, because the row number of the fire holes on the outer convex surface is more than 4 rows, the gas is uniformly distributed to each fire hole to form a wider high-temperature combustion area, the narrow high-temperature combustion area with only one row of fire holes is improved, the high-temperature heat exchange area is increased, and the heat exchange efficiency is improved. Firepower can be evenly distributed in the fire holes of more than 4 rows, so that the bottom of the pot is evenly heated.
Description
Technical Field
The invention relates to the technical field of cookers, in particular to an outer ring fire cover and a burner.
Background
Conventional burners include an outer ring fire cap. Two circumferential rows of holes are generally arranged on the outer surface side surface of the outer ring fire cover, wherein one row of holes are main fire holes (main fire holes), and the other row of holes are flame stabilizing holes (or flame stabilizing grooves). Considering the fire transfer and the supplement of secondary air, the central heat load can not be too small, and the central heat load is basically more than 300W, so that the integral structure size of the burner is larger, and when the size of the outer ring fire cover is larger, the heat exchange area is reduced, and the heat efficiency of the burner is reduced. In addition, this structure often causes the bottom of the pan to be close to the firepower of main fire hole department comparatively violent, and the pan bottom is heated inhomogeneously, influences the culinary art effect of food.
Disclosure of Invention
The invention aims to provide an outer ring fire cover which can effectively improve the heat efficiency and ensure full combustion of gas.
The second technical problem to be solved by the present invention is to provide a burner, which can effectively improve the thermal efficiency and ensure the sufficient combustion of the gas.
The first technical problem is solved by the following technical scheme:
an outer ring fire cover comprising: the body is arranged in an annular shape, an outer convex part is arranged between the inner peripheral edge and the outer peripheral edge of the body, the outer convex part protrudes from the air inlet side of the body to the fire outlet side so as to form an external combustion space on the air inlet side of the body, the outer convex surface of the outer convex part comprises an inner end surface facing the center of the body and an outer end surface back to the center of the body, the outer end surface is arranged on the periphery of the inner end surface, two or more circumferential rows of fire holes are arranged on the inner end surface and the outer end surface, the total area of all the fire holes on the outer end surface is 1.5-3 times of the total area of all the fire holes on the inner end surface, and the curvature radius of the inner end surface is 0.3-0.8 times of the curvature radius of the outer end surface.
Compared with the background technology, the outer ring fire cover of the invention has the following beneficial effects:
the total area of all the fire holes on the outer end surface is 1.5-3 times of the total area of all the fire holes on the inner end surface, the curvature radius of the inner end surface is 0.3-0.8 times of the curvature radius of the outer end surface, the fire holes on the outer end surface are arranged outwards, the fire holes on the inner end surface are arranged inwards, and the outer end surface and the inner end surface are both provided with more than two rows of fire holes, so that a large-area high-temperature combustion area can be realized. In addition, because the row number of the fire holes on the outer convex surface is more than 4 rows, the gas is uniformly distributed to each fire hole to form a wider high-temperature combustion area, the narrow high-temperature combustion area with only one row of fire holes is improved, the high-temperature heat exchange area is increased, and the heat exchange efficiency is improved. Fire holes above 4 rows can evenly distribute fire power to solve the problem that the fire power is concentrated on the main fire hole and the bottom of the cookware is unevenly heated.
In one embodiment, the inner end surface and the outer end surface are both annular curved surfaces, and the outer peripheral edge of the inner end surface is connected with the inner peripheral edge of the outer end surface; the curvature radius of the inner end surface is 0.7-0.75 times of the curvature radius of the outer end surface.
In one embodiment, the radius of curvature of the inner end surface is 7 mm-9 mm; the curvature radius of the outer end face is 10 mm-12 mm. Therefore, for the outer ring fire cover with the same inner diameter and outer diameter, when the curvature of the outer convex surface is larger, the generated arc length is longer, the distance between fire holes can be made larger, flame is easier to form flame particles, the flame of each row of fire holes is distinct, the combustion is more sufficient, and the content of harmful substance co in the generated smoke is lower; when the curvature is small, flames generated by the fire holes are easy to be connected to form a flame group, only one layer of flames is formed, the combustion is insufficient, and the content of harmful substance co in the generated smoke is relatively high.
In one embodiment, an included angle between the axial direction of the fire hole and the normal direction of the part of the outer convex surface corresponding to the fire hole is 0-10 degrees.
In one embodiment, the fire holes of adjacent rows are arranged on the outer convex surface at equal intervals; the number of rows of fire holes on the outer end face is 2 to 4; the number of rows of fire holes on the inner end surface is 2-4. So, because the row number of the fire hole on the outer convex surface is more than 4 rows, distribute each fire hole to the gas uniformly, form the high temperature combustion region of a broad, improved the narrow high temperature combustion district that only has a row of fire hole, increased high temperature heat transfer area, improve heat exchange efficiency. Firepower can evenly be distributed to the fire hole more than 4 rows, can realize that the pan bottom is heated evenly.
In one embodiment, the fire holes in adjacent rows are arranged in a staggered manner; the distance between the edges of the adjacent fire holes is 1.2-2 times of the diameter of the fire holes; the diameter of the fire hole is 1.4 mm-1.7 mm.
In one embodiment, when the body is placed normally horizontally, the included angle P1 between the axial direction of the fire holes in the innermost row and the horizontal plane is not less than 50 degrees, and the included angle P2 between the axial direction of the fire holes in the outermost row and the horizontal plane is not less than 62 degrees.
In one embodiment, when the body is placed normally horizontally, the distance L1 between the edge of the fire hole in the innermost row and the inner peripheral edge of the body in the horizontal direction is 0.4 mm-2 mm, and the distance L2 between the edge of the fire hole in the outermost row and the outer peripheral edge of the body in the horizontal direction is 0.4 mm-2 mm.
In one embodiment, the depth of the fire hole is 2.5 mm-3 mm; the diameter of the peripheral edge of the body is 90-120 mm.
The second technical problem is solved by the following technical solutions:
a burner comprising an outer ring fire cover as described in any of the above embodiments.
Compared with the background art, the combustor of the invention has the following beneficial effects:
because the total area of all fire holes on the outer end surface is 1.5-3 times of the total area of all fire holes on the inner end surface, the ratio of the curvature radius of the inner end surface to the curvature radius of the outer end surface is 0.3-0.8, the fire holes on the outer end surface are arranged outwards, the fire holes on the inner end surface are arranged inwards, and the outer end surface and the inner end surface are both provided with more than two rows of fire holes, so that a large-area high-temperature combustion area can be realized, more fire holes can be arranged on the outer ring fire covers with the same diameter size, equivalently, the heat exchange area is increased, the heat efficiency is improved, and the gas combustion is more sufficient. In addition, because the row number of the fire holes on the outer convex surface is more than 4 rows, the gas is uniformly distributed to each fire hole to form a wider high-temperature combustion area, the narrow high-temperature combustion area with only one row of fire holes is improved, the high-temperature heat exchange area is increased, and the heat exchange efficiency is improved. Fire holes above 4 rows can evenly distribute fire power to solve the problem that the fire power is concentrated on the main fire hole and the bottom of the cookware is unevenly heated.
Drawings
FIG. 1 is a top view of an outer ring fire cover according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view at A-A of FIG. 1;
FIG. 3 is a cross-sectional view at B-B of FIG. 1;
FIG. 4 is a top view block diagram of a combustor in accordance with an embodiment of the present invention;
FIG. 5 is an exploded view of a burner according to an embodiment of the present invention;
fig. 6 is an exploded cross-sectional view of a burner according to an embodiment of the present invention.
Reference numerals:
10. an outer ring fire cover; 11. a body; 111. an inner peripheral edge; 112. a peripheral edge; 113. an external combustion space; 114. an outer convex surface; 1141. an inner end surface; 1142. an outer end face; 115. fire holes; 116. a step position; 12. a support plate; 20. a furnace end; 21. an external gas chamber; 22. an internal combustion air cavity; 23. a gas interface; 30. an inner fire cover.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description of the present invention, it should be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.
In one embodiment, referring to fig. 1 and 2, an outer fire lid 10 includes a body 11. The body 11 is arranged in a ring shape, and an outer convex part is arranged between the inner peripheral edge 111 and the outer peripheral edge 112 of the body 11. The outer protrusion protrudes from the inlet side of the body 11 to the outlet side to form an outer combustion space 113 at the inlet side of the body 11. The outer convex surface 114 of the outer convex portion includes an inner end surface 1141 facing the center of the body 11 and an outer end surface 1142 facing away from the center of the body 11. The outer end surface 1142 is disposed on the periphery of the inner end surface 1141, two or more circumferential rows of fire holes 115 are disposed on both the inner end surface 1141 and the outer end surface 1142, the total area of all the fire holes 115 on the outer end surface 1142 is 1.5-3 times the total area of all the fire holes 115 on the inner end surface 1141, and the curvature radius of the inner end surface 1141 is 0.3-0.8 times the curvature radius of the outer end surface 1142.
In the outer ring fire cover 10, the total area of all the fire holes 115 on the outer end surface 1142 is 1.5 to 3 times of the total area of all the fire holes 115 on the inner end surface 1141, the curvature radius of the inner end surface 1141 is 0.3 to 0.8 times of the curvature radius of the outer end surface 1142, the fire holes 115 on the outer end surface 1142 are arranged outwards, the fire holes 115 on the inner end surface 1141 are arranged inwards, and the outer end surface 1142 and the inner end surface 1141 are both provided with more than two rows of fire holes 115. In addition, because the row number of the fire holes 115 on the outer convex surface 114 is more than 4, the fuel gas is uniformly distributed to each fire hole 115 to form a wider high-temperature combustion area, the narrow high-temperature combustion area with only one row of fire holes 115 is improved, the high-temperature heat exchange area is increased, and the heat exchange efficiency is improved. Firepower can evenly be distributed to fire hole 115 more than 4 rows to solve the firepower and concentrate on main fire hole 115, the inhomogeneous problem of pan bottom is heated.
It can be understood that the body 11 has an inlet side and an outlet side which are opposite to each other in the axial direction, and the fire holes 115 penetrate through the inlet side and the outlet side of the body 11, so that the gas on the inlet side of the body 11 can be ejected to the outlet side through the fire holes 115 for combustion. The outer ring fire cover 10 is generally horizontally disposed with its air inlet side facing downward and its fire outlet side facing upward, and the body 11 has an outer convex portion projecting upward, so that an outer combustion space 113 recessed upward is formed at the lower side of the body 11, and fire holes 115 are provided on the outer convex portion, so that the outer combustion space 113 and the fire outlet side communicate through the fire holes 115.
Further, referring to fig. 2 to 4, the inner end surface 1141 and the outer end surface 1142 are both annular curved surfaces, and the outer peripheral edge of the inner end surface 1141 is connected to the inner peripheral edge of the outer end surface 1142. The radius of curvature of the inner end surface 1141 is 0.7 to 0.75 times the radius of curvature of the outer end surface 1142.
Specifically, the diameter of the outer peripheral edge 112 of the main body 11 is 90mm to 120 mm.
In one embodiment, referring to fig. 2 and 3, the radius of curvature of the inner end surface 1141 is 7mm to 9 mm; the radius of curvature of the outer end surface 1142 is 10mm to 12 mm. Thus, for the outer ring fire cover 10 with the same inner diameter and outer diameter, when the curvature of the outer convex surface 114 is larger, the generated arc length is longer, the distance between the fire holes 115 can be made larger, the flame is easier to form flame particles, the flame of each row of fire holes 115 is distinct, the combustion is more sufficient, and the content of harmful substance co in the generated smoke is lower; when the curvature is small, flames generated by the fire holes 115 are easy to be connected to form a flame group, only one layer of flame is generated, the combustion is insufficient, and the content of harmful substance co in the generated smoke is relatively high.
In one embodiment, referring to fig. 3, an angle between an axial direction of the fire hole 115 and a normal direction of a portion of the outer convex surface 114 corresponding to the fire hole 115 is 0 ° to 10 °. Specifically, the number of rows is counted from the inner peripheral edge 111 to the outer peripheral edge 112 of the outer convex surface 114, an angle a1 between the axial direction of the fire holes 115 in the second row of the outer convex surface 114 and the normal direction of the portion on the outer convex surface 114 where the fire holes 115 are located is 8 °, an angle a2 between the axial direction of the fire holes 115 in the fourth row of the outer convex surface 114 and the normal direction of the portion on the outer convex surface 114 where the fire holes 115 are located is 5 °, and an angle a3 between the axial direction of the fire holes 115 in the sixth row of the outer convex surface 114 and the normal direction of the portion on the outer convex surface 114 where the fire holes 115 are located is 8 °.
In one embodiment, referring to fig. 1 to 4, the fire holes 115 of adjacent rows are disposed on the outer convex surface 114 at equal intervals. The number of rows of the fire holes 115 on the outer end surface 1142 is 2 to 4; the number of rows of fire holes 115 on the inner end surface 1141 is 2 to 4. Therefore, the rows of the fire holes 115 on the outer convex surface 114 are more than 4, so that the fuel gas is uniformly distributed to each fire hole 115 to form a wider high-temperature combustion area, the narrow high-temperature combustion area with only one row of fire holes 115 is improved, the high-temperature heat exchange area is increased, and the heat exchange efficiency is improved. Firepower can evenly be distributed to the fire holes 115 more than 4 rows, and even heating at the bottom of the cooker can be realized.
In one embodiment, referring to fig. 1 to 4, the fire holes 115 in adjacent rows are disposed in a staggered manner. So for the gas homoenergetic of the fire hole 115 department of different height positions realizes with the air contact and mixes, realizes that the burning is more abundant, and the combustion effect is better. Particularly, the line of the center of any two adjacent three fire holes 115 on the outer convex surface 114 is equilateral triangle, so the fire holes 115 are uniformly distributed on the outer convex surface 114, the fire is uniformly distributed, the combustion is more sufficient, the combustion effect is better, and the bottom of the cookware is uniformly heated.
In one embodiment, referring to fig. 1 to 4, the distance between the edges of the adjacent fire holes 115 is 1.2 to 2 times the diameter of the fire holes 115; the diameter of the fire hole 115 is 1.4 mm-1.7 mm. Therefore, the diameter range of the fire hole 115 is 1.4 mm-1.7 mm, the tempering limit of the burner is increased, the wall thickness of the body 11 can be reduced, and the effects of saving resources and reducing cost can be achieved.
Referring to fig. 1 and 2, four or more rows of fire holes 115 are spaced apart from each other along the radial direction of the body 11, such that the four or more rows of fire holes 115 are arranged at different heights on the outer convex surface 114. So for the gas homoenergetic of the fire hole 115 department of co-altitude position not realizes the contact with the air and mixes, and then forms the ladder of highly difference on body 11 and goes out the fire effect, realizes that the burning is more abundant, and the combustion effect is better.
In order to make the combustion on the body 11 more uniform, a plurality of fire holes 115 are provided at the same protruding height of the outer protrusion, and the plurality of fire holes 115 are arranged at intervals along the circumferential direction of the body 11. Specifically, the fire holes 115 are uniformly distributed along the circumferential direction of the body 11, thereby ensuring uniform combustion at each position on the body 11.
In one embodiment, referring to fig. 2 and 3, when the body 11 is placed in a normal horizontal position, an included angle P1 between the axial direction of the fire holes 115 in the innermost row and the horizontal plane is not less than 50 °, and an included angle P2 between the axial direction of the fire holes 115 in the outermost row and the horizontal plane is not less than 62 °. The innermost row of fire holes 115 refers to the row of fire holes 115 on the outer convex surface 114 closest to the center of the body 11, and the outermost row of fire holes 115 refers to the row of fire holes 115 on the outer convex surface 114 farthest from the center of the body 11.
In one embodiment, referring to fig. 2 and 3, when the body 11 is placed normally horizontally, a distance L1 between the edge of the fire hole 115 in the innermost row and the inner peripheral edge 111 of the body 11 in the horizontal direction is 0.4mm to 2mm, and a distance L2 between the edge of the fire hole 115 in the outermost row and the outer peripheral edge 112 of the body 11 in the horizontal direction is 0.4mm to 2 mm. Specifically, the distance L1 in the horizontal direction between the edge of the fire hole 115 in the innermost row and the inner peripheral edge 111 of the body 11 is 0.4mm, 0.5mm, 0.6mm, or 2mm, and the distance L2 in the horizontal direction between the edge of the fire hole 115 in the outermost row and the outer peripheral edge 112 of the body 11 is 0.4mm, 1mm, 1.5mm, or 2 mm.
Specifically, the thickness of the fire hole 115 of the body 11 ranges from 2.5mm to 3mm, and the side of the fire hole 115The edge spacing is 1.2 to 2 times the diameter of the fire holes 115, so that the primary air supplement is ensured without affecting the fire transfer between the fire holes 115. The burner described in this embodiment adopts a large premix combustion mode, the primary air coefficient is large, the outer convex surface 114 of the outer ring fire cover 10 is provided with more than 4 rows of fire holes 115, the head pressure is small, and the area of the fire holes directly affects the performance of the burner under a certain rated thermal load. In the present embodiment in particular, the relationship between the thermal load of the burner and the numerical value of the fire hole area is given: a total open area S (mm) of the outer surface 114 under a heat load P (kW) of 3.5 to 5%2)。
In the first combustion test, four outer ring fire covers 10 with the same size and different opening areas on the outer convex surface 114 are selected for the combustion test, wherein the rows of fire holes 115 on the outer convex surface 114 of the 4 outer ring fire covers 10 are respectively 3 rows, 4 rows, 5 rows and 6 rows. The combustion test data is as follows:
for the outer ring fire cover 10 with only 3 rows of fire holes 115 on the outer convex surface 114, in the combustion test, the flames of the 3 rows of fire holes 115 are away from the flames, and the combustion condition is poor;
for the outer ring fire cover 10 with 4 rows of fire holes 115 on the outer convex surface 114, 2 rows of fire holes 115 are respectively arranged on the inner end surface 1141 and the outer end surface 1142, and during a combustion test, part of flames of the 4 rows of fire holes 115 leaves the flames, so that the combustion condition is poor;
for the outer ring fire cover 10 with only 5 rows of fire holes 115 on the outer convex surface 114, 2 rows of fire holes 115 and 3 rows of fire holes 115 are respectively arranged on the inner end surface 1141 and the outer end surface 1142, and during a combustion test, flames of the 5 rows of fire holes 115 basically do not leave the flames, so that the combustion condition is better;
for the outer ring fire cover 10 with only 6 rows of fire holes 115 on the outer convex surface 114, 3 rows of fire holes 115 are respectively arranged on the inner end surface 1141 and the outer end surface 1142, and during a combustion test, flames of the 6 rows of fire holes 115 basically do not leave the flames, so that the combustion condition is better;
for the outer ring fire cover 10 with only 7 rows of fire holes 115 on the outer convex surface 114, 3 rows of fire holes 115 and 4 rows of fire holes 115 are respectively arranged on the inner end surface 1141 and the outer end surface 1142, and during a combustion test, flames of the 7 rows of fire holes 115 basically do not leave the flames, so that the combustion condition is better;
for the outer ring fire cover 10 with only 8 rows of fire holes 115 on the outer convex surface 114, 4 rows of fire holes 115 are respectively arranged on the inner end surface 1141 and the outer end surface 1142, and during a combustion test, flames of the 8 rows of fire holes 115 basically do not leave the flames, so that the combustion condition is better.
The conclusion of the combustion test is that when the number of rows of the fire holes 115 on the outer convex surface 114 is less than 4, the combustion condition is poor; when the number of rows of the fire holes 115 on the outer convex surface 114 is more than 5, the flame is not substantially separated from the flame, and the combustion condition is better.
And II, selecting a plurality of outer ring fire covers 10 with the same size and different curvatures of the outer convex surfaces 114 for carrying out combustion tests:
the curvature radius of the inner end surface 1141 is 20mm, the curvature radius of the outer end surface 1142 is 25mm, the curvature of the outer convex surface 114 is very small, during a combustion test, flames generated by the fire holes 115 are easily connected to form a flame group, only one layer of flames is formed, the combustion is insufficient, and the co content of harmful substances in the generated smoke is high;
the curvature radius of the inner end surface 1141 is 15mm, the curvature radius of the outer end surface 1142 is 20mm, the curvature of the outer convex surface 114 is smaller, during a combustion test, flames generated by the fire holes 115 are easily connected to form a flame group, only one layer of flames is formed, the combustion is insufficient, and the content of harmful substance co in the generated smoke is relatively higher;
the curvature radius of the inner end surface 1141 is 10mm, the curvature radius of the outer end surface 1142 is 15mm, the curvature of the outer convex surface 114 is smaller, during a combustion test, the generated arc length is long, flame forms flame particles, the flame of each fire hole 115 is distinct, the combustion is sufficient, and the content of harmful substance co in the generated smoke is low;
the curvature radius of the inner end surface 1141 is 9mm, the curvature radius of the outer end surface 1142 is 12mm, the curvature of the outer convex surface 114 is small, during a combustion test, the generated arc length is long, flame forms flame particles, the flame of each fire hole 115 is distinct, the combustion is sufficient, and the content of harmful substance co in the generated smoke is low;
the radius of curvature of the inner end surface 1141 is 8mm, the radius of curvature of the outer end surface 1142 is 11mm, the curvature of the outer convex surface 114 is small, during a combustion test, the generated arc length is long, flame forms flame particles, the flame of each fire hole 115 is distinct, the combustion is sufficient, and the content of harmful substance co in the generated smoke is low;
the radius of curvature of the inner end surface 1141 is 7mm, the radius of curvature of the outer end surface 1142 is 10mm, the curvature of the outer convex surface 114 is small, during a combustion test, the generated arc length is long, flame forms flame particles, the flame of each fire hole 115 is distinct, the combustion is sufficient, and the content of harmful substance co in the generated smoke is low.
The conclusion of the combustion test data is that when the curvature of the outer convex surface 114 is larger, the generated arc length is longer, the distance between the fire holes 115 can be made larger, the flame is easier to form flame particles, the flame of each fire hole 115 is distinct, the combustion is more sufficient, and the content of harmful substance co in the generated smoke is lower; when the curvature is small, flames generated by the fire holes 115 are easy to be connected to form a flame group, only one layer of flame is generated, the combustion is insufficient, and the content of harmful substance co in the generated smoke is relatively high.
In one embodiment, referring to fig. 2 to 6, a burner includes the outer ring fire cover 10 according to any one of the above embodiments.
In the burner, because the total area of all the fire holes 115 on the outer end surface 1142 is 1.5 to 3 times of the total area of all the fire holes 115 on the inner end surface 1141, the ratio of the curvature radius of the inner end surface 1141 to the curvature radius of the outer end surface 1142 is 0.3 to 0.8, the fire holes 115 on the outer end surface 1142 are arranged outwards, the fire holes 115 on the inner end surface 1141 are arranged inwards, and the outer end surface 1142 and the inner end surface 1141 are both provided with more than two rows of fire holes 115, so that a large-area high-temperature combustion area can be realized. In addition, because the row number of the fire holes 115 on the outer convex surface 114 is more than 4, the fuel gas is uniformly distributed to each fire hole 115 to form a wider high-temperature combustion area, the narrow high-temperature combustion area with only one row of fire holes 115 is improved, the high-temperature heat exchange area is increased, and the heat exchange efficiency is improved. Firepower can evenly be distributed to fire hole 115 more than 4 rows to solve the firepower and concentrate on main fire hole 115, the bottom of pan is heated inhomogeneous problem.
Further, referring to fig. 2 to 6, the burner further includes a burner head 20 and an inner fire cover 30. The burner 20 is provided with an outer gas chamber 21, and the outer gas space 113 of the body 11 is communicated with the outer gas chamber 21. The burner 20 is further provided with an inner gas cavity 22, the inner gas cavity 22 and the outer gas cavity 21 are arranged independently, and the outer gas cavity 21 is arranged around the outer periphery of the inner gas cavity 22. The intake side of the inner fire cover 30 communicates with the inner combustion air chamber 22. Specifically, the burner 20 is further provided with two gas ports 23, wherein one gas port 23 is communicated with the internal gas cavity 22, and the other gas port 23 is communicated with the external gas cavity.
Further, referring to fig. 2 to 6, the outer ring fire cover 10 is covered on the burner 20, the peripheral edge 112 of the body 11 contacts with the outer sidewall of the outer gas chamber 21, the peripheral edge 112 of the body 11 is provided with a step, and the step contacts with the outer sidewall of the outer gas chamber 21, so that the body 11 is stably arranged on the burner 20, and better sealing performance can be ensured. In addition, the inner peripheral edge 111 of the body 11 is connected with the annular support plate 12, specifically, the body 11 and the support plate 12 are integrated, and the support plate 12 is in contact with the inner side wall of the outer gas chamber 21, which is beneficial to stably arrange the body 11 on the burner 20 and ensure better sealing performance.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An outer ring fire cover (10), comprising:
a body (11), the body (11) is arranged in a ring shape, an outer convex portion is arranged between an inner peripheral edge (111) and an outer peripheral edge (112) of the body (11), the outer convex portion protrudes from an air inlet side of the body (11) to a fire outlet side so as to form an outer combustion space (113) at the air inlet side of the body (11), an outer convex surface (114) of the outer convex portion comprises an inner end surface (1141) facing the center of the body (11) and an outer end surface (1142) facing away from the center of the body (11), the outer end surface (1142) is arranged at the periphery of the inner end surface (1141), two or more circumferential rows of fire holes (115) are arranged on the inner end surface (1141) and the outer end surface (1142), and the total area of all the fire holes (115) on the outer end surface (1142) is 1.5-3 times of the total area of all the fire holes (115) on the inner end surface (1141), the curvature radius of the inner end surface (1141) is 0.3-0.8 times of the curvature radius of the outer end surface (1142).
2. The outer ring fire cover (10) of claim 1, wherein the inner end surface (1141) and the outer end surface (1142) are both annular curved surfaces, and an outer peripheral edge of the inner end surface (1141) is connected to an inner peripheral edge of the outer end surface (1142); the radius of curvature of the inner end surface (1141) is 0.7 to 0.75 times the radius of curvature of the outer end surface (1142).
3. The outer ring fire cover (10) of claim 2 wherein the radius of curvature of the inner end surface (1141) is 7mm to 9 mm; the curvature radius of the outer end surface (1142) is 10-12 mm.
4. The outer ring fire cover (10) of claim 1, wherein an angle between an axial direction of the fire holes (115) and a normal direction of a portion of the outer convex surface (114) corresponding to the fire holes (115) is 0 ° to 10 °.
5. The outer ring fire cover (10) of claim 1, wherein the fire holes (115) of adjacent rows are arranged on the outer convex surface (114) at equal intervals; the row number of the fire holes (115) on the outer end surface (1142) is 2 to 4; the number of rows of the fire holes (115) on the inner end surface (1141) is 2-4.
6. The outer ring fire cover (10) of claim 1 wherein said fire apertures (115) of adjacent rows are offset from one another; the distance between the edges of the adjacent fire holes (115) is 1.2-2 times of the diameter of the fire holes (115); the diameter of the fire hole (115) is 1.4 mm-1.7 mm.
7. The outer ring fire cover (10) of claim 1, wherein an angle P1 between an axial direction of said fire holes (115) of an innermost row and a horizontal plane is not less than 50 ° and an angle P2 between an axial direction of said fire holes (115) of an outermost row and a horizontal plane is not less than 62 ° when said body (11) is placed normally horizontally.
8. The outer ring fire cover (10) of claim 1, wherein when said body (11) is placed normally horizontally, a distance L1 in a horizontal direction between an edge of said fire holes (115) of an innermost row and an inner peripheral edge (111) of said body (11) is 0.4mm to 2mm, and a distance L2 in a horizontal direction between an edge of said fire holes (115) of an outermost row and an outer peripheral edge (112) of said body (11) is 0.4mm to 2 mm.
9. The outer ring fire cover (10) according to any one of claims 1 to 8, wherein the depth of the fire holes (115) is 2.5mm to 3 mm; the diameter of the peripheral edge (112) of the body (11) is 90-120 mm.
10. A burner, characterized by comprising an outer ring fire cover (10) according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910881297.XA CN110594735B (en) | 2019-09-18 | 2019-09-18 | Outer ring fire cover and burner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910881297.XA CN110594735B (en) | 2019-09-18 | 2019-09-18 | Outer ring fire cover and burner |
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| Publication Number | Publication Date |
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| CN110594735A true CN110594735A (en) | 2019-12-20 |
| CN110594735B CN110594735B (en) | 2024-04-12 |
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| CN201910881297.XA Active CN110594735B (en) | 2019-09-18 | 2019-09-18 | Outer ring fire cover and burner |
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| CN110594735B (en) | 2024-04-12 |
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