CN117329515A - External fire cover for burner, burner and gas stove - Google Patents
External fire cover for burner, burner and gas stove Download PDFInfo
- Publication number
- CN117329515A CN117329515A CN202311253546.3A CN202311253546A CN117329515A CN 117329515 A CN117329515 A CN 117329515A CN 202311253546 A CN202311253546 A CN 202311253546A CN 117329515 A CN117329515 A CN 117329515A
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- Prior art keywords
- fire
- flame
- holes
- fire cover
- hole
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- 238000010304 firing Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 41
- 229910052757 nitrogen Inorganic materials 0.000 description 25
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 22
- 230000000694 effects Effects 0.000 description 19
- 230000000087 stabilizing effect Effects 0.000 description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- 238000010438 heat treatment Methods 0.000 description 18
- 238000002485 combustion reaction Methods 0.000 description 13
- 239000002737 fuel gas Substances 0.000 description 11
- 238000003756 stirring Methods 0.000 description 11
- 238000004781 supercooling Methods 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 9
- 239000003345 natural gas Substances 0.000 description 9
- 238000000926 separation method Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000126 substance Substances 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
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
-
- 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
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/08—Arrangement or mounting of burners
- F24C3/085—Arrangement or mounting of burners on ranges
Abstract
The invention relates to the technical field of gas stoves, and discloses an outer fire cover for a burner, the burner and the gas stove, wherein the outer fire cover is of an annular structure and comprises a top wall, the top wall is inclined downwards from outside to inside along the radial direction of the outer fire cover, a first fire hole is formed in the top wall, and the top end of the first fire hole is inclined towards the central axis direction of the outer fire cover. The flame from the first flame hole can be matched with the inner flame cover, so that the initial temperature of cold gas can be effectively increased, the propagation speed of the flame is increased, the flame is easier to stabilize, and the heat efficiency is higher.
Description
Technical Field
The invention relates to the technical field of gas cookers, in particular to an outer fire cover for a burner, the burner and the gas cooker.
Background
In the related art, an outer fire cover of a burner is generally composed of a top wall, an annular inner side wall and an annular outer side wall, and the annular outer peripheral wall is provided with fire holes. When the air flow rate of methane in the mixed gas is reduced to a certain value, the flame propagation speed is difficult to reach balance with the cold gas flow rate, stable flame is broken, and unstable combustion phenomena such as flame separation, stirring and the like can occur.
Disclosure of Invention
In view of the above, the present invention provides an outer flame cover for a burner, a burner and a gas stove, so as to solve the problem that flame is easy to leave when the air coefficient is too high.
In a first aspect, the invention provides an outer fire cover for a burner, the outer fire cover is of an annular structure and comprises a top wall, the top wall is inclined downwards along the radial direction of the outer fire cover and from outside to inside, the top wall is provided with a plurality of first fire holes, the top end of each first fire hole is inclined towards the central axis direction of the outer fire cover, and a plurality of normals of a plurality of top wall surfaces where the plurality of first fire holes are located are converged on the central axis.
The beneficial effects are that: through radial direction along outer fire lid and from outside-in, the roof slope is downwards, and the roof is equipped with first fire hole, and the top of every first fire hole is towards the axis direction slope of outer fire lid, and a plurality of normals of a plurality of roof faces that a plurality of first fire holes are located assemble in the axis, and the flame that comes out from first fire hole can mutually support with interior fire lid, can effectively improve cold gas initial temperature to increase flame propagation speed, make the flame more stable, the thermal efficiency is higher.
And the flame stabilizing groove structure is not required to be additionally arranged, so that the structure of the outer fire cover is simplified.
Proved by verification, when the outer fire cover is practically applied, full premix flame with the excess air coefficient of approximately 5.3KW and 1.1 can be obtained.
In an alternative embodiment, the angle between the top wall and the horizontal is A, 13A 17.
The beneficial effects are that: the contained angle between roof and the horizontal plane is between 13 to 17, from outside to inside, roof slope downwards, and the top of adding first fire hole is towards the axis direction slope of outer fire lid, and the flame that comes out from first fire hole can cooperate with interior fire lid each other, can effectively improve cold state gas initial temperature to increase flame propagation speed, make the flame more stable, the thermal efficiency is higher.
In an alternative embodiment, the axis of the first fire hole in the depth direction is perpendicular to the top wall, and/or the axis of the first fire hole in the depth direction coincides with the normal of the corresponding top wall surface.
The beneficial effects are that: because the extending direction of the first fire hole is perpendicular to the top wall, and the top wall is inclined downwards from outside to inside, the top end of the first fire hole is inclined towards the central axis direction of the outer fire cover, flames coming out of the first fire hole can be matched with the inner fire cover, the initial temperature of cold gas can be effectively improved, the flame propagation speed is increased, the flames are easier to stabilize, and the heat efficiency is higher.
In an alternative embodiment, the first fire holes are provided with a plurality of circles along the radial direction of the outer fire cover, and the first fire holes of two adjacent circles are distributed in a staggered manner.
The beneficial effects are that: the first fire holes are provided with a plurality of circles, and the first fire holes of two adjacent circles are distributed in a staggered way, so that the flame stabilizing effect can be further realized, especially in the range of 7.5 percent N 2 Under the working condition of flame separation, the air flows of the first fire holes are prevented from being directly converged to lose the mutual heating effect.
In an alternative embodiment, the first fire holes are provided with three circles, and the hole distance between two adjacent first fire holes of two adjacent circles is h, wherein h is more than or equal to 3.1mm and less than or equal to 3.7mm.
The beneficial effects are that: the first fire holes are provided with three circles, the hole distance between two adjacent first fire holes of two adjacent circles is 3.1mm to 3.7mm, and the flame stabilizing effect can be further realized, especially at 7.5 percent of N 2 Under the working condition of flame separation, the air flows of each first fire hole are prevented from being directly converged to lose the mutual heating effect, and simultaneously, the phenomenon thatThe unburned fuel gas is supercooled and locally unstable.
In an alternative embodiment, the diameter of the first fire hole is d, and d is 2.2 mm.ltoreq.d.ltoreq.2.6 mm.
The beneficial effects are that: the aperture of the first fire hole is between 2.2mm and 2.6mm, which can further play a role of stabilizing flame, especially at 7.5% N 2 Under the working condition of flame separation, the air flows of the first fire holes are prevented from being directly converged to lose the mutual heating effect.
In an alternative embodiment, the length of the first fire hole is L, and L is 4.8 mm.ltoreq.L.ltoreq.5.3 mm.
The beneficial effects are that: the length of the first fire hole is between 4.8mm and 5.3mm, the burner can be suitable for natural gas combustion with maximum power of 5.3KW, and can be suitable for stirring of gas components of a pipeline in a certain range, wherein the maximum nitrogen component is not more than 7.5%, and the excess air coefficient is between 1 and 1.1.
In an alternative embodiment, the outer fire cover comprises an inner annular wall and an outer annular wall connected to the inner side and the outer side of the top wall, and the outer annular wall and/or the inner annular wall are/is of a stepped structure.
The beneficial effects are that: the outer annular wall and/or the inner annular wall are of a stepped structure and can be matched with the shape of the distributor, and when the outer fire cover is arranged above the distributor, the whole outer surface is a flat annular surface, so that the appearance is neat and attractive.
In a second aspect, the invention further provides a burner, which comprises an inner fire cover and the outer fire cover for the burner, wherein the inner fire cover is arranged in the center of the outer fire cover, and the outer circumferential wall of the inner fire cover is provided with a second fire hole.
The beneficial effects are that: the inner fire cover is located the center of outer fire cover, and the outer perisporium of inner fire cover is equipped with the second fire hole, and the roof slope of outer fire cover is downwards, and the roof is equipped with first fire hole, and the top of first fire hole is towards the axis direction slope of outer fire cover, and the flame that comes out from first fire hole can mutually support with inner fire cover, can effectively improve cold gas initial temperature to increase flame propagation speed, make the flame stabilize more easily, and the thermal efficiency is higher.
In an alternative embodiment, the burner further comprises a distributor, and the outer fire cover is arranged on the distributor, and the fire striking needle passes through a notch of the distributor.
In a third aspect, the invention also provides a burner range comprising the burner.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an outer fire cover of a burner according to an embodiment of the present invention;
FIG. 2 is a schematic view of the outer fire cover of FIG. 1 with the first fire holes of the first ring and the first fire holes of the third ring being radially spaced apart;
FIG. 3 is a schematic view of the outer fire cover of FIG. 1 after installation in the distributor;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a cross-sectional view A-A of FIG. 4;
FIG. 6 is a front perspective view of FIG. 3;
fig. 7 is a schematic structural view of a burner according to an embodiment of the present invention.
Reference numerals illustrate:
1. an outer fire cover; 100. a top wall; 101. a first fire hole; 102. an outer annular wall; 103. an inner annular wall; 2. an inner fire cover; 201. a second fire hole; 3. a fire divider; 4. an ignition needle; 5. a burner; 6. and an air duct.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the related art, the outer fire cover 1 of the burner is generally composed of a top wall 100, an annular inner side wall and an annular outer side wall, and the annular outer peripheral wall is provided with fire holes. When the air flow rate of methane in the mixed gas is reduced to a certain value, the flame propagation speed is difficult to reach balance with the cold gas flow rate, stable flame is broken, and unstable combustion phenomena such as flame separation, stirring and the like can occur.
In the burner of the related art, when the gas composition of the gas pipe fluctuates (7.5% N 2 ) Under the working condition of 7.5% N 2 The concentration of combustible substances in the mixture is reduced, so that the flame propagation speed of the mixture is reduced, and combustion cannot be maintained.
Embodiments of the present invention are described below with reference to fig. 1 to 7.
According to a first aspect of the present invention, there is provided an outer fire cover 1 for a burner, wherein the outer fire cover 1 has a ring-shaped structure, and includes a top wall 100, the top wall 100 is inclined downward from outside to inside along a radial direction of the outer fire cover 1, the top wall 100 is provided with a plurality of first fire holes 101, a top end of each first fire hole 101 is inclined toward a central axis direction of the outer fire cover 1, and a plurality of normals of a plurality of top wall surfaces where the plurality of first fire holes 101 are located are converged at the central axis.
In this embodiment, by inclining the top wall 100 downward from outside to inside along the radial direction of the outer fire cover 1, the top wall 100 is provided with the first fire holes 101, the top end of each first fire hole 101 inclines toward the central axis direction of the outer fire cover 1, and the normals of the top wall surfaces where the plurality of first fire holes 101 are located are converged on the central axis, the flame coming out of the first fire holes 101 can be matched with the inner fire cover 2, so that the initial temperature of cold gas can be effectively increased, the flame propagation speed can be increased, the flame can be more easily stabilized, and the thermal efficiency is higher.
And the flame stabilizing groove structure is not required to be additionally arranged, so that the structure of the outer fire cover 1 is simplified.
Proved by verification, when the outer fire cover 1 is practically applied, full premix flame with the excess air coefficient of approximately 5.3KW and 1.1 can be obtained.
In one embodiment, the angle between the top wall 100 and the horizontal is A, 13A 17.
In this embodiment, the included angle between the top wall 100 and the horizontal plane is between 13 ° and 17 °, from outside to inside, the top wall 100 is inclined downward, and in addition, the top end of the first fire hole 101 is inclined toward the central axis direction of the outer fire cover 1, the flame coming out from the first fire hole 101 can be matched with the inner fire cover 2, so that the initial temperature of cold gas can be effectively increased, the flame propagation speed is increased, the flame is easier to stabilize, and the thermal efficiency is higher.
In particular, in one embodiment, the angle between the top wall 100 and the horizontal is 13 °.
In this embodiment, the included angle between the top wall 100 and the horizontal plane is 13 °, from outside to inside, the top wall 100 is inclined downward, and in addition, the top end of the first fire hole 101 is inclined toward the central axis direction of the outer fire cover 1, the flame coming out from the first fire hole 101 can be matched with the inner fire cover 2, so that the initial temperature of cold gas can be effectively increased, the flame propagation speed is increased, the flame is easier to stabilize, and the thermal efficiency is higher.
In particular, in one embodiment, the angle between the top wall 100 and the horizontal is 14 °.
In this embodiment, the included angle between the top wall 100 and the horizontal plane is 14 °, from outside to inside, the top wall 100 is inclined downward, and in addition, the top end of the first fire hole 101 is inclined toward the central axis direction of the outer fire cover 1, the flame coming out from the first fire hole 101 can be matched with the inner fire cover 2, so that the initial temperature of cold gas can be effectively increased, the flame propagation speed is increased, the flame is easier to stabilize, and the thermal efficiency is higher.
In particular, in one embodiment, the angle between the top wall 100 and the horizontal is 15 °.
In this embodiment, the included angle between the top wall 100 and the horizontal plane is 15 ° from outside to inside, the top wall 100 is inclined downward, and in addition, the top end of the first fire hole 101 is inclined toward the central axis direction of the outer fire cover 1, the flame coming out from the first fire hole 101 can be matched with the inner fire cover 2, so that the initial temperature of cold gas can be effectively increased, the flame propagation speed is increased, the flame is easier to stabilize, and the thermal efficiency is higher.
In particular, in one embodiment, the angle between the top wall 100 and the horizontal is 16 °.
In this embodiment, the included angle between the top wall 100 and the horizontal plane is 16 °, from outside to inside, the top wall 100 is inclined downward, and in addition, the top end of the first fire hole 101 is inclined toward the central axis direction of the outer fire cover 1, the flame coming out from the first fire hole 101 can be matched with the inner fire cover 2, so that the initial temperature of cold gas can be effectively increased, the flame propagation speed is increased, the flame is easier to stabilize, and the thermal efficiency is higher.
In particular, in one embodiment, the angle between the top wall 100 and the horizontal is 17 °.
In this embodiment, the included angle between the top wall 100 and the horizontal plane is 17 °, from outside to inside, the top wall 100 is inclined downward, and in addition, the top end of the first fire hole 101 is inclined toward the central axis direction of the outer fire cover 1, the flame coming out from the first fire hole 101 can be matched with the inner fire cover 2, so that the initial temperature of cold gas can be effectively increased, the flame propagation speed is increased, the flame is easier to stabilize, and the thermal efficiency is higher.
In one embodiment, the axis of the first fire hole 101 in the depth direction is perpendicular to the top wall 100, and/or the axis of the first fire hole 101 in the depth direction coincides with the normal of the corresponding top wall surface.
In this embodiment, since the extending direction of the first fire hole 101 is perpendicular to the top wall 100, and the top wall 100 is inclined downward from outside to inside, it is ensured that the top end of the first fire hole 101 is inclined toward the central axis direction of the outer fire cover 1, and the flame coming out of the first fire hole 101 can cooperate with the inner fire cover 2, so that the initial temperature of cold gas can be effectively increased, and the flame propagation speed can be increased, so that the flame is easier to stabilize, and the thermal efficiency is higher.
In addition, since the extending direction of the first fire hole 101 is perpendicular to the top wall 100, the first fire hole 101 is also easily machined.
In an embodiment not shown in the drawings, the angle between the extending direction of the first fire hole 101 and the top wall 100 may be smaller than 90 °.
In one embodiment, the first fire holes 101 are provided with a plurality of circles in the radial direction of the outer fire cover 1, and the first fire holes 101 of two adjacent circles are staggered.
In the embodiment, the first fire holes 101 are provided with a plurality of circles, and the first fire holes 101 of two adjacent circles are staggered, so that the flame stabilizing effect can be further realized, especially at 7.5 percent N 2 And the gas flows of the respective first flame holes 101 are prevented from directly converging to lose the effect of mutual heating under the lifted flame condition.
In one embodiment, the first fire holes 101 are provided with three circles, the first fire holes 101 of the first circle and the first fire holes 101 of the third circle are in radial one-to-one correspondence, and the hole distance between two adjacent first fire holes 101 of two adjacent circles is h, wherein h is more than or equal to 3.1mm and less than or equal to 3.7mm.
In the embodiment, the first fire holes 101 are provided with three circles, the first fire holes 101 of the first circle and the first fire holes 101 of the third circle are in radial one-to-one correspondence, the hole distance between two adjacent first fire holes 101 of two adjacent circles is between 3.1mm and 3.7mm, and the flame stabilizing effect can be further realized, especially at 7.5 percent N 2 Under the flame-leaving working condition, the air flows of the first flame holes 101 are prevented from being directly converged to lose the mutual heating effect, and meanwhile, local instability caused by supercooling of unburned fuel gas can be avoided.
The hole distance between two adjacent first fire holes 101 in two adjacent circles is specifically the hole distance between two adjacent first fire holes 101 in the first circle and the second circle, or the hole distance between two adjacent first fire holes 101 in the second circle and the third circle.
It should be noted that, in this embodiment, the number of the first fire holes 101 in each circle is not limited, and when the size of the outer fire cover 1 is fixed, the positions of the first fire holes 101 may be determined according to the hole distances between two adjacent first fire holes 101 in two adjacent circles.
It should be noted that, in this embodiment, the included angle between the axes of the two adjacent first fire holes 101 of two adjacent circles is not limited, and the effect of flame stabilization can be further achieved as long as the hole distance between the two adjacent first fire holes 101 of two adjacent circles is between 3.1mm and 3.7mm, especially at 7.5% n 2 Under the flame-leaving working condition, the air flows of the first flame holes 101 are prevented from being directly converged to lose the mutual heating effect, and meanwhile, local instability caused by supercooling of unburned fuel gas can be avoided.
Specifically, in one embodiment, the first fire holes 101 are provided with three circles, the first fire holes 101 of the first circle and the first fire holes 101 of the third circle are in one-to-one correspondence along the radial direction, and the hole distance between two adjacent first fire holes 101 of two adjacent circles is 3.1mm.
In the embodiment, the first fire holes 101 are provided with three circles, the first fire holes 101 of the first circle and the first fire holes 101 of the third circle are in radial one-to-one correspondence, the hole distance between two adjacent first fire holes 101 of two adjacent circles is 3.1mm, and the flame stabilizing effect can be further achieved, especially at 7.5% N 2 Under the flame-leaving working condition, the air flows of the first flame holes 101 are prevented from being directly converged to lose the mutual heating effect, and meanwhile, local instability caused by supercooling of unburned fuel gas can be avoided.
Specifically, in one embodiment, the first fire holes 101 are provided with three circles, the first fire holes 101 of the first circle and the first fire holes 101 of the third circle are in one-to-one correspondence along the radial direction, and the hole distance between two adjacent first fire holes 101 of two adjacent circles is 3.2mm.
In the embodiment, the first fire holes 101 are provided with three circles, the first fire holes 101 of the first circle and the first fire holes 101 of the third circle are in radial one-to-one correspondence, the hole distance between two adjacent first fire holes 101 of two adjacent circles is 3.2mm, and the flame stabilizing effect can be further achieved, especially at 7.5% N 2 Under the flame-leaving working condition, the air flows of the first flame holes 101 are prevented from being directly converged to lose the mutual heating effect, and meanwhile, local instability caused by supercooling of unburned fuel gas can be avoided.
Specifically, in one embodiment, the first fire holes 101 are provided with three circles, the first fire holes 101 of the first circle and the first fire holes 101 of the third circle are in one-to-one correspondence along the radial direction, and the hole distance between two adjacent first fire holes 101 of two adjacent circles is 3.3mm.
In the embodiment, the first fire holes 101 are provided with three circles, the first fire holes 101 of the first circle and the first fire holes 101 of the third circle are in radial one-to-one correspondence, the hole distance between two adjacent first fire holes 101 of two adjacent circles is 3.3mm, and the flame stabilizing effect can be further achieved, especially at 7.5% N 2 Under the flame-leaving working condition, the air flows of the first flame holes 101 are prevented from being directly converged to lose the mutual heating effect, and meanwhile, local instability caused by supercooling of unburned fuel gas can be avoided.
Specifically, in one embodiment, three circles of first fire holes 101 are arranged, the first fire holes 101 of the first circle and the first fire holes 101 of the third circle are in one-to-one correspondence along the radial direction, the hole distance between two adjacent first fire holes 101 of two adjacent circles is 3.4mm, and meanwhile local instability caused by supercooling of unburned fuel gas can be avoided.
In the embodiment, the first fire holes 101 are provided with three circles, the first fire holes 101 of the first circle and the first fire holes 101 of the third circle are in radial one-to-one correspondence, the hole distance between two adjacent first fire holes 101 of two adjacent circles is 3.4mm, and the flame stabilizing effect can be further achieved, especially at 7.5% N 2 Under the flame-leaving working condition, the air flows of the first flame holes 101 are prevented from being directly converged to lose the mutual heating effect, and meanwhile, local instability caused by supercooling of unburned fuel gas can be avoided.
Specifically, in one embodiment, the first fire holes 101 are provided with three circles, the first fire holes 101 of the first circle and the first fire holes 101 of the third circle are in one-to-one correspondence along the radial direction, and the hole distance between two adjacent first fire holes 101 of two adjacent circles is 3.5mm.
In the embodiment, the first fire holes 101 are provided with three circles, the first fire holes 101 of the first circle and the first fire holes 101 of the third circle are in radial one-to-one correspondence, the hole distance between two adjacent first fire holes 101 of two adjacent circles is 3.5mm, and the flame stabilizing effect can be further achieved, especially at 7.5% N 2 Under the condition of flame separation, the air flows of the first fire holes 101 are prevented from being directly converged and losing the mutual heatingAnd meanwhile, local instability caused by supercooling of unburned fuel gas can be avoided.
Specifically, in one embodiment, the first fire holes 101 are provided with three circles, the first fire holes 101 of the first circle and the first fire holes 101 of the third circle are in one-to-one correspondence along the radial direction, and the hole distance between two adjacent first fire holes 101 of two adjacent circles is 3.6mm.
In the embodiment, the first fire holes 101 are provided with three circles, the first fire holes 101 of the first circle and the first fire holes 101 of the third circle are in radial one-to-one correspondence, the hole distance between two adjacent first fire holes 101 of two adjacent circles is 3.6mm, and the flame stabilizing effect can be further achieved, especially at 7.5% N 2 Under the flame-leaving working condition, the air flows of the first flame holes 101 are prevented from being directly converged to lose the mutual heating effect, and meanwhile, local instability caused by supercooling of unburned fuel gas can be avoided.
Specifically, in one embodiment, the first fire holes 101 are provided with three circles, the first fire holes 101 of the first circle and the first fire holes 101 of the third circle are in one-to-one correspondence along the radial direction, and the hole distance between two adjacent first fire holes 101 of two adjacent circles is 3.7mm.
In the embodiment, the first fire holes 101 are provided with three circles, the first fire holes 101 of the first circle and the first fire holes 101 of the third circle are in radial one-to-one correspondence, the hole distance between two adjacent first fire holes 101 of two adjacent circles is 3.7mm, and the flame stabilizing effect can be further achieved, especially at 7.5 percent N 2 Under the flame-leaving working condition, the air flows of the first flame holes 101 are prevented from being directly converged to lose the mutual heating effect, and meanwhile, local instability caused by supercooling of unburned fuel gas can be avoided.
In one embodiment, the first fire hole 101 has a diameter d of 2.2 mm.ltoreq.d.ltoreq.2.6 mm.
In this embodiment, the first fire hole 101 has a diameter of 2.2mm to 2.6mm, and can further serve as a flame stabilizer, especially at 7.5% N 2 And the gas flows of the respective first flame holes 101 are prevented from directly converging to lose the effect of mutual heating under the lifted flame condition.
In particular, in one embodiment, the first fire hole 101 has a diameter of 2.2mm, and can further play a role in stabilizing flame, especially at 7.5% N 2 And the gas flows of the respective first flame holes 101 are prevented from directly converging to lose the effect of mutual heating under the lifted flame condition.
In particular, in one embodiment, the first fire hole 101 has a diameter of 2.3mm, and can further play a role in stabilizing flame, especially at 7.5% N 2 And the gas flows of the respective first flame holes 101 are prevented from directly converging to lose the effect of mutual heating under the lifted flame condition.
In particular, in one embodiment, the first fire hole 101 has a diameter of 2.4mm, and can further play a role in stabilizing flame, especially at 7.5% N 2 And the gas flows of the respective first flame holes 101 are prevented from directly converging to lose the effect of mutual heating under the lifted flame condition.
In particular, in one embodiment, the first fire hole 101 has a diameter of 2.5mm, and can further play a role in stabilizing flame, especially at 7.5% N 2 And the gas flows of the respective first flame holes 101 are prevented from directly converging to lose the effect of mutual heating under the lifted flame condition.
In particular, in one embodiment, the first fire hole 101 has a diameter of 2.6mm, and can further play a role in stabilizing flame, especially at 7.5% N 2 And the gas flows of the respective first flame holes 101 are prevented from directly converging to lose the effect of mutual heating under the lifted flame condition.
In one embodiment, the length of the first fire hole 101 is L,4.8 mm.ltoreq.L.ltoreq.5.3 mm.
In this embodiment, the length of the first fire hole 101 is between 4.8mm and 5.3mm, which can be suitable for natural gas combustion with maximum power of 5.3KW, and can be suitable for stirring the gas component of the pipeline in a certain range, wherein the nitrogen component is not more than 7.5% at most, and the excess air coefficient is between 1 and 1.1.
In particular, in one embodiment, the length of the first fire hole 101 is 4.8mm, which can be suitable for natural gas combustion with maximum power of 5.3KW, and can be suitable for stirring the gas component of the pipeline in a certain range, wherein the nitrogen component is not more than 7.5% at most, and the excess air coefficient is between 1 and 1.1.
In particular, in one embodiment, the length of the first fire hole 101 is 4.9mm, which can be suitable for natural gas combustion with maximum power of 5.3KW, and can be suitable for stirring the gas composition of the pipeline in a certain range, wherein the nitrogen composition is not more than 7.5% at most, and the excess air coefficient is between 1 and 1.1.
In particular, in one embodiment, the length of the first fire hole 101 is 5.0mm, which can be suitable for natural gas combustion with maximum power of 5.3KW, and can be suitable for stirring the gas component of the pipeline in a certain range, wherein the nitrogen component is not more than 7.5% at most, and the excess air coefficient is between 1 and 1.1.
In particular, in one embodiment, the length of the first fire hole 101 is 5.1mm, which can be suitable for natural gas combustion with maximum power of 5.3KW, and can be suitable for stirring the gas component of the pipeline in a certain range, wherein the nitrogen component is not more than 7.5% at most, and the excess air coefficient is between 1 and 1.1.
In particular, in one embodiment, the length of the first fire hole 101 is 5.2mm, which can be suitable for natural gas combustion with maximum power of 5.3KW, and can be suitable for stirring the gas component of the pipeline in a certain range, wherein the nitrogen component is not more than 7.5% at most, and the excess air coefficient is between 1 and 1.1.
In particular, in one embodiment, the length of the first fire hole 101 is 5.3mm, which can be suitable for natural gas combustion with maximum power of 5.3KW, and can be suitable for stirring the gas component of the pipeline in a certain range, wherein the nitrogen component is not more than 7.5% at most, and the excess air coefficient is between 1 and 1.1.
In one embodiment, the outer fire cover 1 includes an inner annular wall 103 and an outer annular wall 102 connected to the inner and outer sides of the top wall 100, and the outer annular wall 102 and/or the inner annular wall 103 are of a stepped structure.
In this embodiment, the outer annular wall 102 and/or the inner annular wall 103 have a stepped structure, which can be adapted to the shape of the distributor 3, and when the outer fire cover 1 is installed above the distributor 3, the whole outer surface is a flat annular surface, and the appearance is neat and beautiful.
Specifically, in one embodiment, the included angle between the top wall 100 and the horizontal plane is between 13 ° and 17 °, the extending direction of the first fire hole 101 is perpendicular to the top wall 100, the first fire hole 101 is provided with three circles, the first fire hole 101 of the first circle and the first fire hole 101 of the third circle are in one-to-one correspondence along the radial direction, the hole distance between the first fire hole 101 of the first circle and the first fire hole 101 of the third circle along the radial direction is between 3.1mm and 3.7mm, the aperture of the first fire hole 101 is between 2.2mm and 2.6mm, the length of the first fire hole 101 is between 4.8mm and 5.3mm, and the whole matching design can be suitable for natural gas combustion with maximum power of 5.3KW, can adapt to stirring of pipeline gas components in a certain range, wherein the nitrogen component is not more than 7.5% at most, the excess air coefficient is between 1 and 1.1, and the combustion stability reaches the best under the premise that other components of the gas stove are unchanged.
According to a second aspect of the present invention, there is also provided a burner comprising an inner fire cover 2, and the outer fire cover 1 for a burner described above, the inner fire cover 2 being provided at the center of the outer fire cover 1, the outer circumferential wall of the inner fire cover 2 being provided with a second fire hole 201.
In this embodiment, the inner fire cover 2 is located at the center of the outer fire cover 1, the outer peripheral wall of the inner fire cover 2 is provided with the second fire hole 201, the top wall 100 of the outer fire cover 1 is inclined downwards, the top wall 100 is provided with the first fire hole 101, the top end of the first fire hole 101 is inclined towards the central axis direction of the outer fire cover 1, and flames coming out of the first fire hole 101 can be matched with the inner fire cover 2, so that the initial temperature of cold gas can be effectively improved, the flame propagation speed is increased, the flames are easier to stabilize, and the heat efficiency is higher.
As shown in fig. 7, the top of the inner fire cover 2 is closed, and only the outer peripheral wall of the inner fire cover 2 is provided with a plurality of second fire holes 201, so that flames coming out of the second fire holes 201 are horizontally outwards along the radial direction, the first fire holes 101 incline upwards and can have a certain degree of convection with flames coming out of the second fire holes 201, the initial temperature of cold gas can be effectively improved, the propagation speed of the flames is increased, the flames are easier to stabilize, and the heat efficiency is higher.
In one embodiment, the burner further comprises a distributor 3, and a firing pin, wherein the outer fire cover 1 is arranged on the distributor 3, and the firing pin passes through a notch of the distributor 3.
In one embodiment, as shown in fig. 7, the burner further comprises a burner 5, an air duct 6.
According to a third aspect of embodiments of the present invention, there is also provided a burner stove, comprising a burner.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.
Claims (11)
1. An outer fire lid for combustor, characterized in that, outer fire lid (1) is annular structure, including roof (100), follows the radial direction of outer fire lid (1) and from outside-in, roof (100) slope downwards, roof (100) are equipped with a plurality of first fire holes (101), every the top orientation of first fire hole (101) the axis direction slope of outer fire lid (1), and a plurality of normals of a plurality of roof faces that a plurality of first fire holes (101) are located converge in the axis.
2. An outer fire cover for a burner according to claim 1, characterized in that the angle between the top wall (100) and the horizontal is a,13 ° a 17 °.
3. The outer fire cover for a burner according to claim 1 or 2, characterized in that the axis of the first fire hole (101) in the depth direction is perpendicular to the top wall (100) and/or that the axis of the first fire hole (101) in the depth direction coincides with the normal of the corresponding top wall surface.
4. An outer fire cover for a burner according to claim 3, characterized in that the first fire holes (101) are provided with a plurality of turns in the radial direction of the outer fire cover (1), and the first fire holes (101) of adjacent turns are staggered.
5. The outer fire cover for a burner according to claim 4, wherein the first fire holes (101) are provided with three circles, and the hole distance between two adjacent first fire holes (101) of two adjacent circles is h, wherein h is 3.1mm < 3.7mm.
6. An outer fire cover for a burner according to claim 1 or 2, characterized in that the first fire hole (101) has a diameter d of 2.2 mm.ltoreq.d.ltoreq.2.6 mm.
7. An outer fire cover for a burner according to claim 1 or 2, characterized in that the depth of the first fire hole (101) is L,4.8mm +.l +.5.3 mm.
8. The outer fire cover for a burner according to claim 1 or 2, characterized in that the outer fire cover (1) comprises an inner annular wall (103) and an outer annular wall (102) connected to the inner and outer sides of the top wall (100), the outer annular wall (102) and/or the inner annular wall (103) being of stepped construction.
9. A burner, characterized by comprising an inner fire cover (2) and an outer fire cover (1) for a burner according to any one of claims 1 to 8, the inner fire cover (2) being provided in the center of the outer fire cover (1), the outer circumferential wall of the inner fire cover (2) being provided with second fire holes (201).
10. Burner according to claim 9, characterized in that it further comprises a distributor (3), a firing pin, said outer fire cover (1) being arranged on said distributor (3), said firing pin passing through a notch of said distributor (3).
11. A burner stove comprising a burner as claimed in any one of claims 9 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311253546.3A CN117329515A (en) | 2023-09-26 | 2023-09-26 | External fire cover for burner, burner and gas stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311253546.3A CN117329515A (en) | 2023-09-26 | 2023-09-26 | External fire cover for burner, burner and gas stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117329515A true CN117329515A (en) | 2024-01-02 |
Family
ID=89294584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311253546.3A Pending CN117329515A (en) | 2023-09-26 | 2023-09-26 | External fire cover for burner, burner and gas stove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117329515A (en) |
-
2023
- 2023-09-26 CN CN202311253546.3A patent/CN117329515A/en active Pending
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