CN112880199A - Fire grate unit, combustor and gas equipment - Google Patents
Fire grate unit, combustor and gas equipment Download PDFInfo
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- CN112880199A CN112880199A CN201911204875.2A CN201911204875A CN112880199A CN 112880199 A CN112880199 A CN 112880199A CN 201911204875 A CN201911204875 A CN 201911204875A CN 112880199 A CN112880199 A CN 112880199A
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- 230000000087 stabilizing effect Effects 0.000 claims abstract description 25
- 239000000178 monomer Substances 0.000 claims abstract description 7
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims 2
- 239000002737 fuel gas Substances 0.000 abstract description 46
- 239000007789 gas Substances 0.000 abstract description 25
- 238000002485 combustion reaction Methods 0.000 abstract description 18
- 238000010586 diagram Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000013598 vector Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
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- 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
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- 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
- F23D14/26—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid with provision for a retention flame
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- 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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- 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
- F23D14/62—Mixing devices; Mixing tubes
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Gas Burners (AREA)
Abstract
The invention discloses a fire grate monomer, a burner and gas equipment, wherein the fire grate monomer comprises: the base shell forms an airflow channel with an air inlet and an air outlet; the flame sheet is connected to the base shell and forms a flow stabilizing cavity together with the base shell, the flame sheet is arranged opposite to the gas outlet, the flame sheet defines a plurality of fire holes, and the flow stabilizing cavity is respectively communicated with the gas flow channel and the fire holes; the rectifying structure is arranged at the air outlet of the airflow channel and is arranged opposite to the flame piece, the rectifying structure limits an inlet with a first direction and an outlet rectifying cavity with a second direction, the inlet of the rectifying cavity is communicated with the airflow channel, and the outlet of the rectifying cavity is communicated with the flow stabilizing cavity. According to the fire row single body provided by the embodiment of the invention, the rectification structure is arranged in the airflow channel, and the air-fuel gas is rectified and turned through the rectification structure, so that the lengths and angles of flame jet flows formed by all fire holes of the flame sheet are approximately the same, and flames with the same combustion form are formed above the flame sheet.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a fire grate unit, a burner and gas equipment.
Background
The traditional fire grate usually forms a 'mountain' -shaped flame structure, and particularly, referring to a flame peak diagram above the fire grate in fig. 1, three flame peaks are formed at two ends and the middle of the fire grate. The flame structure is determined by a U-shaped flow field formed by a traditional fire row U-shaped air-fuel gas mixing cavity, wherein the air-fuel gas refers to the mixed gas of air and fuel gas.
Because the traditional fire grate has a specific U-shaped flow field and a V-shaped main flow corresponding to the U-shaped flow field, ascending air flow entering the fire holes usually presents different velocity vectors under the leading action of the main flow, so that flame jet flow formed by the fire holes is not perpendicular to the fire holes, but is in an inclined state with different lengths and different angles, and combustion flames with different heights, speeds and directions are inevitably generated on the same fire grate.
Disclosure of Invention
The present invention aims to solve at least one of the above technical problems to a certain extent.
To this end, the invention proposes a flame row unit which forms a stable and uniform flame jet, thereby forming a uniform combustion flame over the flame sheet.
The invention also provides a burner with the fire row single body, and the burning flame of the burner is uniform and stable.
The invention also provides gas equipment with the combustor, and the gas equipment is stable in combustion and high in combustion efficiency.
The fire grate monomer according to the embodiment of the invention comprises: a base housing defining an airflow passageway having an air inlet and an air outlet;
the flame piece is connected to the base shell and forms a flow stabilizing cavity together with the base shell, the flame piece is arranged opposite to the air outlet, the flame piece defines a plurality of fire holes, and the flow stabilizing cavity is respectively communicated with the airflow channel and the fire holes; the rectifying structure is arranged at the air outlet of the airflow channel and is opposite to the flame piece, the rectifying structure limits an inlet with a first direction and an outlet rectifying cavity with a second direction, the inlet of the rectifying cavity is communicated with the airflow channel, and the outlet of the rectifying cavity is communicated with the flow stabilizing cavity.
According to the fire row single body provided by the embodiment of the invention, the rectification structure is arranged in the airflow channel, and the air-fuel gas is rectified and turned through the rectification structure, so that the flow speed and the direction of the air-fuel gas flowing to the flame sheet are adjusted, the lengths and the angles of flame jet flows formed by all fire holes of the flame sheet are approximately the same, and flames with the same combustion form are formed above the flame sheet.
In addition, the fire grate monomer according to the embodiment of the invention can also have the following additional technical characteristics:
in some embodiments of the present invention, in the airflow flowing direction, a too narrow flow passage is further provided between the flow stabilizing cavity and the flow rectifying cavity, and the flow cross section of the too narrow flow passage is smaller than the flow cross sections of the flow stabilizing cavity and the flow rectifying cavity.
In an optional embodiment, the rectification structure and the base shell are formed in a split manner, the rectification structure is arranged in the airflow channel, the base shell comprises a reducing portion, and a too-narrow channel is formed by the inner wall surface of the reducing portion and the outer wall surface of the rectification structure.
In an alternative embodiment, the rectifying structure is integrally formed with the base shell, one end of the flame plate is connected to a part of the outer wall surface of the rectifying structure, and an excessively narrow flow passage is formed by the outer wall surface of the rectifying structure and the inner wall surface of the flame plate.
In an alternative embodiment, the flow direction of the gas flow of the rectifying chamber comprises a plurality of stages of mixing chambers, and the volume of each stage of mixing chamber is different.
In a further alternative example, the rectification chamber comprises a primary mixing chamber and a secondary mixing chamber which are communicated with each other, and the volume of the secondary mixing chamber is smaller than that of the primary mixing chamber.
In an alternative embodiment, the central axis of the outlet is arranged perpendicular to the central axis of the rectification chamber.
In an alternative embodiment, the central axis of the outlet is at an acute or obtuse angle to the central axis of the rectification chamber.
In some embodiments of the present invention, a plurality of groups of the fire holes are uniformly distributed in the direction of the flame sheet, and correspondingly, a plurality of groups of the outlets are distributed in the rectifying structure, and the plurality of groups of the fire holes and the plurality of groups of the outlets are oppositely disposed.
In an alternative embodiment, the aperture of the outlet in the middle of the rectifying structure is larger than the apertures of the outlets on both sides of the rectifying structure.
The burner according to the second aspect of the present invention includes the fire grate monomer of the above-mentioned embodiment, and since the fire grate monomer according to the embodiment of the present invention can form a stable and uniform flame jet, a stable and uniform flame jet is formed above the flame. Therefore, the combustion flame of the burner according to the embodiment of the present invention is uniform and stable. According to the gas appliance provided by the embodiment of the third aspect of the invention, the gas appliance comprises the combustor, and the gas appliance is stable in combustion and high in combustion efficiency.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural view of a fire grate unit in the prior art, in which a flame combustion pattern is illustrated above a flame sheet;
FIG. 2 is a schematic diagram of a fire row unit according to some embodiments of the invention, in which a flame combustion pattern is shown above the flame sheet;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIGS. 4-1-4 are diagrams of different combinations of flame plates, fairing structures and base housing, respectively;
fig. 5-1-5 are schematic structural diagrams of different forms of rectifying structures.
Reference numerals:
a fire grate 100;
a base shell 10; an airflow passage 11; a diameter-reduced portion 12;
a flame sheet 20; a fire hole 21;
a rectifying structure 30; a rectification chamber 31; an inlet 311; an outlet 312; a primary mixing chamber 313; a secondary mixing chamber 314;
an excessively narrow flow passage 40;
a flow-stabilizing chamber 50.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
Referring to fig. 2-3, 4-1 to 4-3, and 5-1 to 5-5, a fire grate unit 100 according to an embodiment of the present invention is described, the fire grate unit 100 including: a base housing 10, a flame sheet 20 and a fairing 30.
Specifically, as shown in fig. 2, the base housing 10 constitutes an air flow passage 11 extending in the longitudinal direction. Wherein, the flame sheet 20 is connected to the base shell 10, the flame sheet 20 and the base shell 10 form a flow stabilizing cavity 50, the flame sheet 20 and the air outlet are oppositely arranged (as shown in fig. 2, the upper and lower directions are oppositely arranged), the flame sheet 20 defines a plurality of fire holes 21, and the flow stabilizing cavity 50 is respectively communicated with the fire holes 21 and the air flow passage 11. That is, a mixture gas of air and gas (hereinafter, referred to as air-fuel gas) is mixed in the gas flow passage 11 in advance, and then is supplied to the fire holes 21 of the flame plate 20 through the surge chamber 50, thereby forming a combustion flame above the flame plate 20. In other words, without interference of other components, the air-fuel gases flowing from the gas flow channel 11 in different directions and at different flow rates will directly flow through the surge chamber 50 to the flame plate 20 for combustion.
The problem that flame peak heights of different areas of the flame sheet 20 are different due to different flame jet lengths and different flame jet angles of the flame holes 21 of the traditional fire grate 100 is solved. The fire grate unit 100 of the embodiment of the invention is provided with the rectifying structure 30, the rectifying structure 30 is arranged at the outlet of the airflow channel 11, the rectifying structure 30 defines a rectifying cavity 31 with an inlet 311 in the first direction and an outlet 312 in the second direction, the inlet 311 of the rectifying cavity 31 is communicated with the airflow channel 11, the outlet 312 of the rectifying cavity 31 is communicated with the flow stabilizing cavity 50, so that the air-fuel gas enters the rectifying cavity 31 through the inlet 311 and flows out of the rectifying cavity 31 through the outlet 312, namely, the flow speed and the flow direction of the air-fuel gas are interfered by the rectifying structure 30 in advance before entering the flow stabilizing cavity, in the process, the flow speed of the air-fuel gas is rectified by the rectifying cavity 31 to be consistent, and the flow direction of the air-fuel gas is changed from the first direction to the second direction.
It should be noted that the terms "first direction" and "second direction" are only used to describe that the inlet gas flow direction and the outlet gas flow direction of the rectifying structure are not the same, and are not limited to two types of gas flow directions, but the rectifying chamber 31 may function to change the direction of the air-fuel gas as a whole, and the air-fuel gas may flow in various directions after flowing out of the rectifying chamber 31 as long as the final flow direction to the flame plate 20 is substantially the same. The inlet of the rectifying chamber 31 is communicated with the outlet of the gas flow channel 11, and the function of converging the air-fuel gas in all directions in the gas flow channel 11 to the rectifying chamber 31 is achieved.
That is, the air-fuel flow is rectified in the rectifying chamber 31 in advance during flowing to the flame plate 20, and is diverted through the rectifying chamber 31, so as to prevent the air-fuel flow from directly flowing to the flame plate 20 in different directions and at different flow rates. It will be appreciated that the air/fuel gas after flowing out of the chamber 31 is directed uniformly toward the flame plate 20, i.e., all the air/fuel gas will flow toward the flame plate 20 at substantially the same flow rate with the chamber 31 as the velocity starting point.
Because the air-fuel gas enters the rectifying cavity 31 in advance before entering the fire holes 21 of the flame plate 20 and turns and deflects, the flow path of the air flow is prolonged in the length direction, and particularly, when all the air-fuel gas is converged into the rectifying cavity 31 and then turns and flows out from the rectifying cavity 31, the air-fuel gas can be further mixed in the rectifying cavity 31, the air-fuel mixing rate is improved, and even if the air-fuel gas has different flow rates and directions before entering the rectifying cavity 31, the flow rates of the air-fuel gas tend to be consistent once entering the rectifying cavity 31, and the direction of the air-fuel gas can be reset as required.
Therefore, according to the fire row unit 100 of the embodiment of the invention, the rectifying structure 30 is arranged in the gas flow channel 11, and the air-fuel gas is rectified and turned by the rectifying structure 30, so that the flow rate and the direction of the air-fuel gas flowing to the flame sheet 20 are adjusted, the lengths and the angles of flame jet flows formed by the fire holes 21 of the flame sheet 20 are approximately the same, and flames with the same combustion form are formed above the flame sheet 20.
In some embodiments of the present invention, as shown in fig. 3, 4-1-4, a too narrow flow passage 40 is further provided between the flow stabilizing cavity 50 and the rectifying cavity 31, and the flow cross section of the too narrow flow passage 40 is smaller than the flow cross sections of the flow stabilizing cavity 50 and the rectifying cavity 31. That is, the air-fuel gas flowing out of the rectifying chamber 31 flows into the excessively narrow flow passage 40 through the lateral outlet 312, at least a part of the air-fuel gas impinges on the wall surface of the excessively narrow flow passage 40, and flows upward and is dispersed into the flow stabilizing chamber 50 at a reduced speed by being pressed by the excessively narrow flow passage 40, and finally flows into the fire hole 21. In other words, the air-fuel gas is further mixed in the rectification chamber 31, and then is pressurized through the excessively narrow flow passage 40, and then enters the surge chamber 50 to be depressurized. Therefore, the air-fuel gas forms a flame jet flow with a uniform direction close to the vertical fire hole 21, and the problem of uneven flame distribution caused by different flow speeds and directions of the air-fuel gas in the flow stabilizing cavity 50 is effectively solved.
In an alternative embodiment, the flow-regulating structure 30 and the base shell 10 are formed separately, the flow-regulating structure 30 is embedded in the airflow channel 11, the base shell 10 includes a reduced diameter portion 12, and an excessively narrow flow passage 40 is formed by an inner wall surface of the reduced diameter portion and an outer wall surface of the flow-regulating structure 30. As shown in fig. 3, the flow cross section of the reduced diameter portion is smaller than the flow cross section of the flow stabilizing cavity 50 and the flow channel 11, and a part of the rectifying structure 30 extends into the reduced diameter portion 12, so as to form a too narrow flow channel 40, so that the air-fuel gas can enter the too narrow flow channel 40 to rapidly increase the flow velocity and is extruded and ascended into the flow stabilizing cavity 50.
In an alternative embodiment, as shown in fig. 4-1-4, the fairing structure 30 is integrally formed with the base shell 10, one end of the flame sheet 20 is attached to a portion of the outer wall surface of the fairing structure 30, and the outer wall surface of the fairing structure 30 and the inner wall surface of the flame sheet 20 define an overly narrow flow channel 40. That is, a rectifying structure 30 for rectifying the air-fuel gas is formed in the flow direction of the gas flow passage 11 of the base housing 10, and the rectifying structure 30 forms an outlet 312 so as to turn the air-fuel gas from the first direction to the second direction. As shown in fig. 4-1 and 4-2, the rectifying cavity 31 formed by the rectifying structure 30 may be a plurality of sections of chambers communicated with each other; the rectification chamber 31 may also comprise at least one section of a reducer chamber; as shown in fig. 4-3 and 4-4, the inlet 311 of the rectifying chamber 31 forms a tapered chamber. Referring to fig. 5-1 to 5-5, the cross-sectional form of the outlet 312 of the rectification chamber 31 may be rectangular, arc-shaped, tapered, and trapezoidal.
In addition, the flame sheet 20 may have various forms, for example, as shown in fig. 4-1 and 4-3, the flame sheet 20 has a cavity structure opened toward the flow stabilizing chamber 50, the cavity structure is formed by bending a plate body, and the fire holes 21 are formed at the closed end of the cavity structure. For another example, as shown in fig. 4-2 and 4-4, the flame sheet 20 is formed by abutting two oppositely disposed plate bodies to form a cavity structure which is open toward the flow-stabilizing cavity 50.
In other embodiments of the present invention, the flow direction of the rectification chamber 31 includes a plurality of stages of mixing chambers, and the mixing chambers of each stage have different volumes. That is, the rectification chamber 31 includes two or more stages of mixing chambers, and the air-fuel gas passes through the mixing chambers having different volumes, so that the air-fuel gas can be mixed and adjusted for multiple times, and a uniform flow rate of the air-fuel gas can be obtained when the air-fuel gas flows out of the rectification chamber 31.
In one embodiment, as shown in FIG. 3, and in FIGS. 4-1-4, the rectification chamber 31 includes a primary mixing chamber 313 and a secondary mixing chamber 314 in communication with each other, the secondary mixing chamber 314 having a volume less than the volume of the primary mixing chamber 313. That is, the volume of the primary mixing chamber 313 in which the rectifying chamber 31 communicates with the upstream side of the airflow passage is large, and the volume of the secondary mixing chamber 314 in which the rectifying chamber 31 communicates with the downstream side of the airflow passage is small. Thus, the primary mixing chamber 313 having a large volume can reduce the flow rate of the air-fuel gas so that the flow rate of the air-fuel gas tends to be uniform.
In an alternative embodiment, as shown in FIGS. 3, 4-1 and 4-2, the central axis of the outlet 312 is disposed perpendicular to the central axis of the fairing cavity 31. In this case, the cross section of the multi-stage mixing chamber of the rectifying chamber 31 is rectangular, so that the air-fuel gas flowing out of the rectifying chamber 31 will impinge on the inner wall surface of the base shell 10 or the flame plate 20, thereby increasing the flow velocity of the air-fuel gas, so that the air-fuel gas can rapidly enter the flow stabilizing chamber.
In alternative embodiments, the central axis of the outlet 312 is at an acute or obtuse angle to the central axis of the fairing cavity 31. In this embodiment, the air-fuel gas flowing out of the rectifying chamber 31 will obliquely impinge on the inner wall surface of the base housing 10 or the flame plate 20, thereby raising the flow rate of the air-fuel gas so that the air-fuel gas can rapidly enter the flow stabilization chamber.
In other embodiments of the present invention, as shown in fig. 2 in conjunction with fig. 3, the flame sheet 20 is provided with a plurality of groups of fire holes 21, and correspondingly, a plurality of groups of outlets 312 are provided in the direction of the flow-straightening structure 30. The plurality of fire holes 21 are disposed opposite the plurality of outlets 312. Wherein the outlets 312 may be distributed on one or both sides of the fairing structure 30, whereby the fairing structure 30 may deliver a substantially uniform flame jet to each set of flame holes 21 of the flame sheet 20, resulting in a uniform flame distribution over the flame sheet 20. The shape of the fire holes 21 is not particularly limited, and the fire holes 21 may be circular, square, diamond, polygonal, or other irregularly shaped holes.
In a further alternative embodiment, the aperture of the outlet 312 in the middle of the fairing structure 30 is larger than the aperture of the outlets 312 on both sides of the fairing structure 30 (e.g., the left and right sides of the fairing structure 30 in FIG. 2). For a conventional "U" shaped flow channel, the air-fuel gas flow rate is greater on both sides than in the central region in the transverse cross-section of the flow channel. Therefore, by setting the hole diameters of the outlets 312 on both sides of the flow straightening structure 30 to be small, the amount of air passing through both sides of the flame sheet 20 can be reduced, and flames having the same combustion pattern can be formed on the flame sheet 20.
The burner according to the embodiment of the present invention includes the fire row single body 100 of the above embodiment, since the fire row single body 100 according to the embodiment of the present invention can form a stable and uniform flame jet, thereby forming a stable and uniform flame jet above the flame. Therefore, the combustion flame of the burner according to the embodiment of the present invention is uniform and stable. The gas equipment provided by the embodiment of the invention comprises the combustor, and the gas equipment is stable in combustion and high in combustion efficiency.
In the description of the present invention, it is to be understood that the terms "bottom", "top", "inside", "outside", "upper", "lower", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (12)
1. A fire row unit, comprising:
a base housing defining an airflow passageway having an air inlet and an air outlet;
the flame piece is connected to the base shell and forms a flow stabilizing cavity together with the base shell, the flame piece is arranged opposite to the air outlet, the flame piece defines a plurality of fire holes, and the flow stabilizing cavity is respectively communicated with the airflow channel and the fire holes;
the rectifying structure is arranged at the air outlet of the airflow channel and is opposite to the flame piece, the rectifying structure limits an inlet with a first direction and an outlet rectifying cavity with a second direction, the inlet of the rectifying cavity is communicated with the airflow channel, and the outlet of the rectifying cavity is communicated with the flow stabilizing cavity.
2. The fire grate unit of claim 1, wherein a too narrow flow passage is further arranged between the flow stabilizing cavity and the flow rectifying cavity in the flow direction of the airflow, and the flow cross section of the too narrow flow passage is smaller than that of the flow stabilizing cavity and the flow rectifying cavity.
3. The fire grate unit of claim 2, wherein the fairing structure and the base shell are formed separately, the fairing structure is arranged in the airflow channel, the base shell comprises a reduced diameter portion, and an excessively narrow channel is formed by the inner wall surface of the reduced diameter portion and the outer wall surface of the fairing structure.
4. The fire grate unit of claim 2, wherein the fairing structure is integrally formed with the base shell, one end of the flame plate is connected to a portion of the outer wall surface of the fairing structure, and the outer wall surface of the fairing structure and the inner wall surface of the flame plate form an excessively narrow flow channel.
5. The fire grate unit of claim 2, wherein the flow direction of the gas flow of the rectifying chamber comprises a plurality of stages of mixing chambers, and each stage of the mixing chambers has a different volume.
6. The fire grate unit of claim 5 wherein the flow straightening chamber comprises a primary mixing chamber and a secondary mixing chamber in communication with each other, the secondary mixing chamber having a volume less than the volume of the primary mixing chamber.
7. The fire grate unit of claim 3 or 4 wherein the central axis of the outlet is disposed perpendicular to the central axis of the flow rectification chamber.
8. The fire grate unit of claim 3 or 4, wherein the central axis of the outlet is at an acute or obtuse angle to the central axis of the rectification chamber.
9. The fire grate unit of claim 1, wherein the flame plate has a plurality of groups of fire holes uniformly distributed therein, and the rectifying structure has a plurality of groups of outlets correspondingly.
10. The fire grate unit of claim 9, wherein the diameter of the outlet in the middle of the flow regulating structure is larger than the diameter of the outlets on both sides of the flow regulating structure, and the fire holes of the plurality of groups are arranged opposite to the outlets of the plurality of groups.
11. A burner comprising the fire grate monomer of any one of claims 1-10.
12. A gas-fired appliance comprising a burner as claimed in claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911204875.2A CN112880199A (en) | 2019-11-29 | 2019-11-29 | Fire grate unit, combustor and gas equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911204875.2A CN112880199A (en) | 2019-11-29 | 2019-11-29 | Fire grate unit, combustor and gas equipment |
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| Publication Number | Publication Date |
|---|---|
| CN112880199A true CN112880199A (en) | 2021-06-01 |
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| CN201911204875.2A Pending CN112880199A (en) | 2019-11-29 | 2019-11-29 | Fire grate unit, combustor and gas equipment |
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| CN (1) | CN112880199A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757660A (en) * | 2021-09-29 | 2021-12-07 | 广东美的白色家电技术创新中心有限公司 | Burner and gas stove |
| WO2024045753A1 (en) * | 2022-08-29 | 2024-03-07 | 芜湖美的智能厨电制造有限公司 | Burner element, burner, and gas water heater |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2041490A1 (en) * | 2006-07-07 | 2009-04-01 | Kyungdong Navien Co., Ltd. | Flame structure of gas burner |
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| CN107917421A (en) * | 2016-10-10 | 2018-04-17 | 关隆股份有限公司 | Burner |
| CN211782004U (en) * | 2019-11-29 | 2020-10-27 | 芜湖美的厨卫电器制造有限公司 | Fire grate unit, combustor and gas equipment |
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| EP2041490A1 (en) * | 2006-07-07 | 2009-04-01 | Kyungdong Navien Co., Ltd. | Flame structure of gas burner |
| JP2009103406A (en) * | 2007-10-25 | 2009-05-14 | Paloma Ind Ltd | Pilot gas burner |
| CN107917421A (en) * | 2016-10-10 | 2018-04-17 | 关隆股份有限公司 | Burner |
| CN206234820U (en) * | 2016-12-08 | 2017-06-09 | 宁波方太厨具有限公司 | Burner for gas water-heater |
| CN107062218A (en) * | 2017-02-10 | 2017-08-18 | 艾欧史密斯(中国)热水器有限公司 | The processing method of burner, gas heater and fire row |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113757660A (en) * | 2021-09-29 | 2021-12-07 | 广东美的白色家电技术创新中心有限公司 | Burner and gas stove |
| CN113757660B (en) * | 2021-09-29 | 2023-08-29 | 广东美的白色家电技术创新中心有限公司 | Burner and gas stove |
| WO2024045753A1 (en) * | 2022-08-29 | 2024-03-07 | 芜湖美的智能厨电制造有限公司 | Burner element, burner, and gas water heater |
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