CN110966604B - Fire cover for gas stove - Google Patents
Fire cover for gas stove Download PDFInfo
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- CN110966604B CN110966604B CN201811155678.1A CN201811155678A CN110966604B CN 110966604 B CN110966604 B CN 110966604B CN 201811155678 A CN201811155678 A CN 201811155678A CN 110966604 B CN110966604 B CN 110966604B
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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
- F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
- F23D14/06—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with radial outlets at the burner head
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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)
- Gas Burners (AREA)
Abstract
The invention relates to a fire cover for a gas stove, which comprises an annular body, a gas mixing cavity, at least two main fire holes arranged on the outer annular wall and arranged at intervals along the circumferential direction, at least two flame stabilizing holes arranged below the main fire holes and arranged at intervals along the circumferential direction, and a first shunting piece, wherein the gas mixing cavity can be divided into a first gas mixing cavity and a second gas mixing cavity, the first gas mixing cavity is communicated with the flame stabilizing holes, the second gas mixing cavity is communicated with the main fire holes, compared with the prior art, the fire cover has the advantages that the gas mixing cavity is correspondingly divided into two parts by the first shunting piece arranged in the gas mixing cavity, so that the gas mixing speed in the gas mixing cavity is low, double insurance is added to the flame stabilization of the main fire holes, firstly, the root of the main fire holes is pulled by the flame stabilizing holes arranged below the main fire holes to stabilize the flame, and in addition, the first independent flame stabilizing cavity is added to carry out self flame, the flame stabilizing effect is good, and the firepower of the main fire hole and the flame stabilizing hole of the fire cover can be the same in size.
Description
Technical Field
The invention relates to the field of household gas cookers, in particular to a fire cover adapted to a combustion stove.
Background
Tempering and flame stabilization are always the research and development focus of a gas burner, the existing burner controls the strength of a fire hole by depending on a fire hole of a fire cover, the tempering is avoided by arranging the flame stabilization hole, but the general opening aperture of the fire hole is larger, the gas outlet speed is still too high, and the flame is stabilized only by the flame stabilization hole, so that the good flame stabilization effect cannot be achieved; or a gas discharge velocity occurs, and when the load required for the combustion apparatus is small, if the gas is supplied at a low pressure, since the injection velocity of the gas injected into the interior of the combustion chamber is lower than the combustion velocity of the mixture gas in the combustion chamber, flames are generated at the inner surface of the fire deck facing the interior of the combustion chamber. As a result, there is a problem that the combustion is abnormal, that is, the occurrence of backfire. That is, if the velocity of the mixture injected through the fire hole is less than a predetermined velocity, the flashback that generates a flame inside the fire hole may occur. However, the utility model discloses a burner for gas stove, which comprises a base, an inner ring fire cover and an outer ring fire cover connected to the base, wherein the inner wall of the top surface of the inner ring fire cover and the annular peripheral wall form a central gas mixing chamber, the annular peripheral wall of the inner ring fire cover is provided with a plurality of inner ring fire holes communicated with the external central gas mixing chamber, the inner wall of the top surface of the outer ring fire cover and the annular peripheral wall form an outer ring gas mixing chamber, the annular peripheral wall of the outer ring fire cover is provided with a plurality of main fire holes, the base is provided with a central gas channel communicated with the central gas mixing chamber and an outer ring gas channel communicated with the outer ring gas mixing chamber, the burner is characterized in that the base is further provided with a vertical annular baffle plate which divides the outer ring gas mixing chamber into a gas mixing chamber at the inner side and a buffer chamber at the outer side, the design of the partition plate in the burner for the gas stove not only can effectively control the intensity of the fire hole, but also has good flame stabilizing effect, avoids the occurrence of a tempering phenomenon, can overcome the defect that the fire hole is controlled by adopting a mode of increasing the wall thickness of the fire cover in the prior art, and greatly reduces the manufacturing cost of the burner;
in another situation, the fire cover generally comprises an inner ring fire cover and an outer ring fire cover, the heating mode of the fire cover to the pot body is basically a mode of combining an outer ring flame and an inner ring flame, but the center of the fire cover still has no flame, which can cause the heating effect of the center position of the pot bottom to be poor, therefore, the applicant provides an inner ring fire cover which can integrate an inner ring and a middle ring into a whole and can vertically and upwardly spray burning flame, as well as a burner using the fire cover, in order to solve the above problems, the fire cover body is provided with an inner ring wall and an outer ring wall, the center of the inner ring wall forms a central through hole, an annular channel is formed between the inner ring wall and the outer ring wall, the bottom of the annular channel is provided with a through hole, and the upper cover is of a sheet structure full of meshes, the structure can lead the combustion of the inner ring fire cover to be concentrated, and the heat loss brought away by the secondary air is less, so the combustion temperature is higher, and the heat efficiency is better; however, the gas of the inner ring fire cover which is directly injected vertically upwards is discharged too fast, and is easy to generate flame separation, and after the gas is discharged, the gas is not stabilized by adopting a buffer baffle plate or other technical means, such as the buffer baffle plate adopted by the fire cover, so that the flame stabilization and the phenomenon of easy backfire of the fire cover need to be improved adaptively.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a fire cover for a gas stove, which can realize high firepower and has good flame stabilization.
The second technical problem to be solved by the present invention is to provide a fire cover for a gas stove, which can uniformly heat a pot, in view of the above-mentioned current state of the art.
The technical scheme adopted by the invention for solving the technical problems is as follows: this a fire lid for gas-cooker including:
the fire cover comprises an annular body, and a gas mixing cavity is formed between an annular top wall of the body and an inner annular wall and an outer annular wall which respectively extend downwards from the inner side edge and the outer side edge of the annular top wall;
the method is characterized in that:
the main fire holes are arranged on the outer ring wall and are at least two arranged at intervals along the circumferential direction;
the flame stabilizing holes are positioned below the main fire holes and are at least two arranged at intervals along the circumferential direction; and
the first flow dividing piece is arranged in the gas mixing cavity and divides the gas mixing cavity into a first gas mixing cavity and a second gas mixing cavity which are relatively independent and are arranged in the radial direction, the first gas mixing cavity is communicated with the flame stabilizing hole, and the second gas mixing cavity is communicated with the main fire hole.
In order to realize the flame stabilizing effect of the flame stabilizing hole, the inner cavity of the first gas mixing cavity is sequentially provided with a narrowing section and a diffusion section along the direction from the inlet to the outlet of the airflow. Due to the design of the diffusion section, the speed of the mixed gas can be effectively reduced after entering, and the flame stabilizing effect of the flame stabilizing hole is better.
Furthermore, the air inlet end of the flame stabilizing hole is positioned on the bottom wall of the outer ring wall, the air outlet end of the flame stabilizing hole is positioned on the outer ring wall and below the main fire hole, the first flow dividing piece comprises a vertical annular first plate body, and the first plate body is formed by extending the bottom wall of the outer ring wall partially to the second air mixing cavity radially inwards and then extending downwards. Of course, the flame stabilizing hole can also adopt a gap forming mode, and only needs to be positioned below the main fire hole; and for the whole structure simplification of the fire cover, the first flow dividing element can be formed by a vertical first plate body positioned on the bottom wall of the outer annular wall.
In order to avoid the defects that the general hole diameter of the main fire hole is larger, the air outlet speed of the main fire hole is still too fast, and the good flame stabilizing effect cannot be achieved only by stabilizing flame in a flame stabilizing hole mode, the inner cavity of the second mixed air cavity sequentially comprises a horn section, a contraction section and an expansion section along the direction from the inlet to the outlet of the air flow. Because the formation of the contraction section of the second air mixing cavity can accelerate the speed of the mixed air entering from the horn section, the speed of the mixed air can be buffered by utilizing the expansion section while the large fire power of the main fire hole is met, and the excessive air outlet speed of the mixed air is avoided.
In order to achieve the purpose of uniformly heating the cookware, the annular top wall is provided with a middle ring part and an inner ring part, the annular top wall is locally recessed downwards to form the expansion section which is directly communicated with the second gas mixing cavity, the top end of the annular cavity is covered with a cover plate, the cover plate is fully distributed with middle fire holes, and the inner ring part is provided with inner fire holes along the circumferential direction. In order to realize the high firepower of the gas stove, the high firepower of the middle ring part is realized through the middle fire hole which can directly spray upwards vertically.
In order to avoid the general trompil aperture of main fire hole great, its speed of giving vent to anger is still too fast, only through the mode steady flame in steady flame hole, still can not reach the defect of fine steady flame effect, the expansion section in the central point in main fire hole puts and is provided with first division board, first division board will the expansion section is separated into the first cushion chamber and the second cushion chamber that are located the top, first cushion chamber intercommunication the upper portion in main fire hole and well fire hole, the second cushion chamber intercommunication the lower part in main fire hole. The main fire hole is divided into two parts through the first partition plate, so that the intensity of the fire hole can be effectively controlled, the expansion section is divided into two parts, the excessive high air outlet speed of the main fire hole is prevented, the flame stabilizing effect is good, and the tempering phenomenon is avoided.
In order to further buffer the mixed gas entering the second buffer cavity from the horn section of the second mixed gas cavity, a second partition plate is arranged at the part, connected with the contraction section of the second buffer cavity, of the bottom of the second buffer cavity.
In order to avoid the big but not good condition of steady flame effect of firepower also easily to cause because the aperture of well fire hole is great, seted up two at least first through-holes on the first division board, two at least second through-holes have been seted up on the second division board, the aperture of second through-hole is greater than the aperture of first through-hole.
In order to realize uniform heating of the cooker and realize flame stabilization of the inner ring part, a second flow dividing piece is further arranged in the second gas mixing cavity and divides the second gas mixing cavity into a third gas mixing cavity communicated with the inner ring part in the radial direction.
Preferably, the inner cavity of the third air mixing cavity is sequentially provided with a reducing section and an expanding section along the direction from the inlet to the outlet of the air flow. The mixed gas is buffered by the mouth expanding section through the accelerated recycling of the mouth contracting section to the mixed gas, so that the flame stabilizing effect can be effectively achieved while the large firepower of the inner ring part is realized.
In order to prevent the mutual interference of the fire-emitting areas of the inner ring part and the outer ring part, the top end of the inner ring part is lower than the top end of the middle ring part.
From the perspective of simple structure and convenient installation, preferably, the second flow divider is arranged below the second partition plate, the second flow divider comprises an annular second plate body vertically spaced from the first plate body, a first gap is formed between the first plate body and the outer annular wall, a second gap is formed between the first plate body and the second plate body, a third gap is formed between the second plate body and the inner annular wall, and the first gap, the second gap and the third gap are all communicated with the air mixing cavity to form a first air mixing cavity, a second air mixing cavity and a third air mixing cavity which are independent from each other.
To facilitate placement of the second divider panel, the second divider panel rests atop the first and second panel bodies.
Further, the second plate body is connected to the inner peripheral wall of the second air mixing cavity. Of course, the second plate body can also be arranged separately from the inner peripheral wall of the second air mixing cavity and supported by the base matched with the second air mixing cavity.
Further, in order to conveniently realize a reducing section and a flaring section of the third air mixing cavity, the lower end of the second plate body extends inwards in the radial direction of the inner annular wall, so that a horn section of the second air mixing cavity and the reducing section of the third air mixing cavity are formed.
In order to enable the inner fire holes of the inner ring portion to have a good flame stabilizing effect, two circles of first inner fire holes and second inner fire holes are distributed in the inner fire holes of the inner ring portion at intervals along the radial direction, and the first inner fire holes and the second inner fire holes are arranged in a staggered mode.
In order to enable the flame of the first inner fire hole and/or the second inner fire hole to form a swirling fire, an included angle of 50-70 degrees is formed between the axis of the first inner fire hole and/or the second inner fire hole and the axis of the body. The secondary air can be better transferred and supplied in the first inner fire hole and/or the second inner fire hole one by one due to the formation of the rotary fire, and the pot bottom can be heated more uniformly by the rotary fire.
Compared with the prior art, the invention has the advantages that the gas mixing cavity is correspondingly divided into two parts by the first flow dividing part arranged in the gas mixing cavity, so that the speed of the gas mixture in the gas mixing cavity is low, the defect that the good flame stabilizing effect can not be achieved still by stabilizing flame only in a flame stabilizing hole mode because the general opening aperture of the main flame hole is large and the gas outlet speed is still too high is overcome, and meanwhile, double insurance is added to the flame stabilizing of the main flame hole.
Drawings
FIG. 1 is a schematic structural diagram of a fire cover in an embodiment of the present invention;
FIG. 2 is a cross-sectional view at an angle of FIG. 1;
FIG. 3 is a cross-sectional view at another angle from FIG. 1;
FIG. 4 is a cross-sectional view of a fire lid placed over a plenum in an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in FIGS. 1 to 4, the preferred embodiment of the present invention is shown. The fire cover for the gas stove comprises a fire cover, wherein the fire cover comprises an annular body 1, and a gas mixing cavity 14 is formed between an annular top wall 11 of the body 1 and an inner annular wall 12 and an outer annular wall 13 which respectively extend downwards from the inner edge and the outer edge of the annular top wall 11; wherein, the outer ring wall 13 has at least two main fire holes 131 arranged along the circumference at intervals, the outer ring wall 13 is arranged below the main fire holes 131 and has at least two flame stabilizing holes 132 arranged along the circumference at intervals, the air inlet end 1321 of the flame stabilizing hole 132 is arranged on the bottom wall of the outer ring wall 13, the air outlet end 1322 of the flame stabilizing hole 132 is arranged below the main fire holes 131 on the outer ring wall 13, a first flow divider is arranged in the air mixing chamber 14 and divides the air mixing chamber 14 into a first air mixing chamber 141 and a second air mixing chamber 142 which are relatively independent and arranged in the radial direction, the first air mixing chamber 141 is communicated with the flame stabilizing holes 132, and the second air mixing chamber 142 is communicated with the main fire holes 131. The air mixing cavity 14 is correspondingly divided into two parts by the first flow dividing part arranged in the air mixing cavity 14, so that the air mixing speed in the air mixing cavity 14 is low, the problem that the flame stabilizing effect cannot be well achieved is solved by stabilizing the flame only through the flame stabilizing hole 132, and meanwhile, double insurance is added to the flame stabilizing of the main flame hole 131, firstly, the root of the flame stabilizing hole 132 below the main flame hole 131 is pulled to stabilize the flame, and in addition, the independent first air mixing cavity 141 is added to stabilize the flame of the flame stabilizing hole 132, and the inner cavity of the first air mixing cavity 141 in the embodiment is sequentially divided into the narrowing section 1411 and the diffusion section 1412 along the inlet to the outlet direction of the air flow. Due to the design of the diffuser 1412, the speed of the mixture can be effectively reduced after the mixture enters, so that the flame stabilizing effect of the flame stabilizing holes 132 is better. The inner cavity of the second air mixing cavity 142 is sequentially a horn section 1421, a contraction section 1422 and an expansion section 1423 along the direction from the inlet to the outlet of the air flow. The formation of the contraction section 1422 of the second air mixing chamber 142 can accelerate the speed of the air mixture entering from the horn section 1421, so that the expansion section 1423 can also buffer the speed of the next air mixture while meeting the requirement of the large fire power of the main fire hole 131, thereby avoiding the excessive air outlet speed. For the sake of simplifying the overall structure of the fire lid, the first flow dividing member may be formed by the vertical first plate body 20 located on the bottom wall of the outer annular wall 13, and may be formed by extending the bottom wall of the outer annular wall 13 partially toward the second air mixing chamber 142 radially inward and then downwardly.
In order to realize the purpose of uniformly heating the cooker, the annular top wall 11 is provided with a middle ring part 111 and an inner ring part 112, the part of the annular top wall 11 is recessed downwards to form an expansion section 1423 directly communicated with the second gas mixing cavity 142, the top end of the annular cavity is covered with a cover plate 10, the cover plate 10 is fully distributed with middle fire holes 101, and the inner ring part 112 is provided with inner fire holes along the circumferential direction. In order to realize the high fire power of the gas stove, the high fire power of the middle ring part 111 is realized through the middle fire hole 101 capable of directly spraying vertically upwards. In order to avoid the defect that the general opening aperture of the main fire hole 131 is large, the air outlet speed is still too high, flame is stabilized only by the flame stabilizing hole 132, and a good flame stabilizing effect cannot be achieved, a first partition plate 2 is arranged in the expanded section 1423 at the center of the main fire hole 131, the expanded section 1423 is divided into a first buffer cavity 1424 and a second buffer cavity 1425 which are located above by the first partition plate 2, the first buffer cavity 1424 is communicated with the upper portion 1311 of the main fire hole 131 and the middle fire hole 101, and the second buffer cavity 1425 is communicated with the lower portion 1312 of the main fire hole 131. Divide into two main fire hole 131 through first division board 2, can not only effectively control fire hole intensity, still divide into two extension segment 1423 simultaneously, prevent that the speed of giving vent to anger of main fire hole 131 is too fast, not only steady flame is effectual still avoided the emergence of tempering phenomenon. In order to further buffer the mixture gas from the horn section 1421 of the second air mixture chamber 142 into the second buffer chamber 1425, a second partition plate 3 is disposed at a portion of the bottom of the second buffer chamber 1425, which is connected to the second buffer chamber 1425 at the contraction section 1422. The first partition plate 2 is provided with a plurality of first through holes 21, the second partition plate 3 is provided with a plurality of second through holes 31, and the aperture of the second through holes 31 is smaller than that of the first through holes 21, so that the situation that the firepower is large but the flame stabilizing effect is poor due to the large aperture of the middle fire hole 101 is avoided. In order to realize the flame stabilization of the inner ring part 112, a second flow dividing member is further arranged in the second gas mixing cavity 142, and the second flow dividing member divides the second gas mixing cavity 142 into a third gas mixing cavity 143 communicated with the inner ring part 112 in the radial direction. The inner cavity of the third air mixing cavity 143 is sequentially provided with a necking section 1431 and a flaring section 1432 along the direction from the inlet to the outlet of the air flow, and the air mixture is accelerated by the necking section 1431 and then buffered by the flaring section 1432, so that the large flame force of the inner ring part 112 is realized and an effective flame stabilizing effect is achieved. In order to prevent the mutual interference of the inner ring portion 112 and the outer ring portion fire-emitting region, it is preferable that the tip of the inner ring portion 112 is lower than the tip of the middle ring portion 111.
Specifically, the second flow divider for dividing the second air mixing cavity 142 is located below the second partition plate 3, and from the perspective of simple structure and convenience in installation, the second flow divider includes an annular second plate body 4 vertically spaced from the first plate body 20, a first gap is provided between the first plate body 20 and the outer annular wall 13, a second gap is provided between the first plate body 20 and the second plate body 4, a third gap is provided between the second plate body 4 and the inner annular wall 12, and the first gap, the second gap and the third gap are all communicated with the air mixing cavity 14 to form a first air mixing cavity 141, a second air mixing cavity 142 and a third air mixing cavity 143 which are independent of each other. Wherein the second partition plate 3 rests on top of the first plate body 20 and the second plate body 4 in order to facilitate placement of the second partition plate 3. Wherein, the second plate body 4 is integrally connected to the inner peripheral wall of the second air mixing cavity 142, and the second plate body 4 and the inner peripheral wall of the second air mixing cavity 142 are separately arranged in this embodiment, and are supported by the base matched with the second air mixing cavity 142. Wherein the lower end 41 of the second plate 4 extends radially inwardly towards the inner annular wall 12, thereby forming a flared section 1421 of the second air mixing chamber 142 and a necked-down section 1431 of the third air mixing chamber 143. Finally, in order to enable the inner fire holes of the inner ring portion 112 to have a good flame stabilizing effect, two circles of first inner fire holes 1121 and second inner fire holes 1122 are distributed at intervals along the radial direction in the inner fire holes of the inner ring portion 112, the first inner fire holes 1121 and the second inner fire holes 1122 are arranged in a staggered mode, and the axes of the first inner fire holes 1121 and the second inner fire holes 1122 form an included angle of 60 degrees with the axis of the body 1.
As shown in fig. 4, in order to match the burner cap above the gas mixing chamber 20, the path of the primary air, the gas and the mixed primary air and gas inside the gas mixing chamber 20 is as follows, because of the low pressure caused by the gas injection from the injector to the ejector tube, the primary air is ejected from the outside through the air inlet of the ejector tube and by the kinetic energy of the gas, the pre-mixing of the primary air and the gas finally enters the gas mixing chamber 14 and is divided into three independent gas mixing chambers 14 by the first and second flow dividing members, the first gas mixing chamber 141 is communicated with the flame stabilizing hole 132, the second gas mixing chamber 142 is communicated with the main fire hole 131 and the middle fire hole 101, the third gas mixing chamber 143 is communicated with the inner fire hole, and the second gas mixing chamber 142 is further provided with the first partition plate 2 dividing the main fire hole 131 into two and the second partition plate 3 dividing the second gas mixing chamber 142 into the contraction section 1422 of the trumpet section 1421, the mixed primary air and fuel gas pass through the flame stabilizing hole 132 of the outer annular wall 13 through the first air mixing cavity 141 and are ignited together with the secondary air of the external environment to form flame stabilizing fire; the mixed primary air and gas are premixed by the horn section 1421 of the second gas mixing cavity 142, the accelerating of the contraction section 1422 and the buffering of the expansion section 1423, so that the gas outlet speed of the gas mixture of the middle fire hole 101 of the middle ring part 111 is slowed down after being accelerated, flame is not easy to separate while large firepower is ensured, and the gas mixture is ignited together with the secondary air of the external environment to form middle ring fire, the first partition plate 2 and the second partition plate 3 positioned in the second gas mixing cavity 142 divide the main fire hole 131 into two parts from top to bottom, the aperture of the first through hole 21 formed in the first partition plate 2 is larger than that of the second through hole 31 formed in the second partition plate 3, so that the gas outlet speed of the gas mixture at the upper part 1311 of the main fire hole 131 is smaller than that at the lower part 1312 of the main fire hole 131, and the gas flows of the gas mixture at the upper part 1311 and the lower part 1312 of the main fire hole 131 collide with each other to further reduce the gas outlet speed of the gas mixture entering the main fire hole 131, and is ignited together with the secondary air of the external environment to form a main ring fire; the mixed gas enters the third gas mixing cavity 143, is accelerated by the necking section 1431 and buffered by the flaring section 1432, and is ignited together with secondary air of the external environment to form inner ring fire, so that the flame is not easy to leave while large fire is formed.
Claims (13)
1. A fire cover for a gas range, comprising:
the fire cover comprises an annular body (1), wherein a gas mixing cavity (14) is formed between an annular top wall (11) of the body (1) and an inner annular wall (12) and an outer annular wall (13) which respectively extend downwards from the inner edge and the outer edge of the annular top wall (11);
the method is characterized in that:
the main fire holes (131) are arranged on the outer ring wall (13) and are at least two arranged at intervals along the circumferential direction;
the flame stabilizing holes (132) are positioned below the main flame holes (131) and are at least two arranged at intervals along the circumferential direction; and
the first flow dividing component is arranged in the gas mixing cavity (14), the first flow dividing component divides the gas mixing cavity (14) into a first gas mixing cavity (141) and a second gas mixing cavity (142) which are relatively independent and are arranged in the radial direction, the first gas mixing cavity (141) is communicated with the flame stabilizing hole (132), and the second gas mixing cavity (142) is communicated with the main fire hole (131);
the inner cavity of the first air mixing cavity (141) is sequentially provided with a narrowing section (1411) and a diffusing section (1412) along the direction from the inlet to the outlet of the airflow;
the inner cavity of the second air mixing cavity (142) is sequentially provided with a horn section (1421), a contraction section (1422) and an expansion section (1423) along the direction from the inlet to the outlet of the air flow;
the annular top wall (11) is provided with a middle ring part (111) and an inner ring part (112), the part of the annular top wall (11) is recessed downwards to form the expansion section (1423) which is directly communicated with the second gas mixing cavity (142), the top end of the expansion section (1423) is covered with a cover plate (10), the cover plate (10) is fully distributed with middle fire holes (101), and the inner ring part (112) is provided with inner fire holes along the circumferential direction;
the expansion section (1423) is internally provided with a first partition plate (2) at the central position of the main fire hole (131), the first partition plate (2) divides the expansion section (1423) into a first buffer cavity (1424) and a second buffer cavity (1425) which are positioned above, the first buffer cavity (1424) is communicated with the upper part (1311) of the main fire hole (131) and the middle fire hole (101), and the second buffer cavity (1425) is communicated with the lower part (1312) of the main fire hole (131).
2. Fire cover for gas cookers according to claim 1, characterized in that: the gas inlet end (1321) of the flame stabilizing hole (132) is positioned on the bottom wall of the outer ring wall (13), the gas outlet end (1322) of the flame stabilizing hole (132) is positioned below the main flame hole (131) of the outer ring wall (13), the first flow dividing element comprises a vertical annular first plate body (20), and the first plate body (20) is formed by extending the bottom wall of the outer ring wall (13) partially to the second gas mixing cavity (142) in a radial inward mode and then extending the bottom wall of the outer ring wall (13) in a downward mode.
3. Fire cover for gas cookers according to claim 2, characterized in that: and a second partition plate (3) is arranged at the part, connected with the contraction section (1422), of the bottom of the second buffer cavity (1425) and the second buffer cavity (1425).
4. Fire cover for gas cookers according to claim 3, characterized in that: the first partition plate (2) is provided with at least two first through holes (21), the second partition plate (3) is provided with at least two second through holes (31), and the aperture of each second through hole (31) is smaller than that of each first through hole (21).
5. Fire cover for gas cookers according to claim 4, characterized in that: and a second flow divider is arranged in the second air mixing cavity (142) and divides the second air mixing cavity (142) into a third air mixing cavity (143) communicated with the inner ring part (112) in the radial direction.
6. Fire cover for gas cookers according to claim 5, characterized in that: the inner cavity of the third air mixing cavity (143) is sequentially provided with a reducing section (1431) and a flaring section (1432) along the direction from the inlet to the outlet of the air flow.
7. The fire cover for the gas range according to any one of claims 3 to 6, wherein: the top end of the inner ring part (112) is lower than the top end of the middle ring part (111).
8. Fire cover for gas cookers according to claim 7, wherein: the second flow dividing element is arranged below the second partition plate (3) and comprises an annular second plate body (4) vertically spaced from the first plate body (20), a first gap is formed between the first plate body (20) and the outer annular wall (13), a second gap is formed between the first plate body (20) and the second plate body (4), a third gap is formed between the second plate body (4) and the inner annular wall (12), and the first gap, the second gap and the third gap are all communicated with the air mixing cavity (14) to form a first air mixing cavity (141), a second air mixing cavity (142) and a third air mixing cavity (143) which are independent of each other.
9. Fire cover for gas cookers according to claim 8, wherein: the second partition plate (3) rests on top of the first plate body (20) and the second plate body (4).
10. Fire cover for gas cookers according to claim 9, wherein: the second plate body (4) is connected to the inner peripheral wall of the second air mixing cavity (142).
11. Fire cover for gas cookers according to claim 10, wherein: the lower end (41) of the second plate body (4) extends inwards in the radial direction towards the inner ring wall (12), so that a horn section (1421) of the second air mixing cavity (142) and a reducing section (1431) of the third air mixing cavity (143) are formed.
12. The fire cover for a gas range according to any one of claims 8 to 11, wherein: two circles of first inner fire holes (1121) and second inner fire holes (1122) are distributed in the inner fire holes of the inner ring portion (112) at intervals in the radial direction, and the first inner fire holes (1121) and the second inner fire holes (1122) are arranged in a staggered mode.
13. Fire cover for gas cookers according to claim 12, wherein: the axis of the first inner fire hole (1121) and/or the second inner fire hole (1122) forms an included angle of 50-70 degrees with the axis of the body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811155678.1A CN110966604B (en) | 2018-09-30 | 2018-09-30 | Fire cover for gas stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811155678.1A CN110966604B (en) | 2018-09-30 | 2018-09-30 | Fire cover for gas stove |
Publications (2)
| Publication Number | Publication Date |
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| CN110966604A CN110966604A (en) | 2020-04-07 |
| CN110966604B true CN110966604B (en) | 2021-10-12 |
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| CN201811155678.1A Active CN110966604B (en) | 2018-09-30 | 2018-09-30 | Fire cover for gas stove |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111735052B (en) * | 2020-07-17 | 2023-04-07 | 佛山市顺德区美的洗涤电器制造有限公司 | Fire cover, combustor and gas stove |
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| CA1264654A (en) * | 1985-02-14 | 1990-01-23 | Rodney T. Heath | Gas heating system for dehydrators and the like |
| JP2002022121A (en) * | 2000-07-05 | 2002-01-23 | Tokyo Gas Co Ltd | Gas fan-heater |
| JP4791701B2 (en) * | 2004-03-31 | 2011-10-12 | バブコック日立株式会社 | Biomass fuel combustion apparatus and method |
| CN102777902A (en) * | 2011-05-10 | 2012-11-14 | 程敏 | Six-ring-fire energy-saving burner |
| CN204063043U (en) * | 2014-07-24 | 2014-12-31 | 宁波方太厨具有限公司 | A kind of fire cover of household gas range and apply the burner of this fire cover |
| CN104930516A (en) * | 2015-06-24 | 2015-09-23 | 宁波方太厨具有限公司 | Combustor fire cover |
| CN204693427U (en) * | 2015-05-27 | 2015-10-07 | 华帝股份有限公司 | Fire distributor for gas stove |
| CN106152129A (en) * | 2016-08-03 | 2016-11-23 | 宁波方太厨具有限公司 | A kind of cooker burner |
| CN106500095A (en) * | 2016-11-18 | 2017-03-15 | 宁波方太厨具有限公司 | A kind of burner for gas-cooker |
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2018
- 2018-09-30 CN CN201811155678.1A patent/CN110966604B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1264654A (en) * | 1985-02-14 | 1990-01-23 | Rodney T. Heath | Gas heating system for dehydrators and the like |
| JP2002022121A (en) * | 2000-07-05 | 2002-01-23 | Tokyo Gas Co Ltd | Gas fan-heater |
| JP4791701B2 (en) * | 2004-03-31 | 2011-10-12 | バブコック日立株式会社 | Biomass fuel combustion apparatus and method |
| CN102777902A (en) * | 2011-05-10 | 2012-11-14 | 程敏 | Six-ring-fire energy-saving burner |
| CN204063043U (en) * | 2014-07-24 | 2014-12-31 | 宁波方太厨具有限公司 | A kind of fire cover of household gas range and apply the burner of this fire cover |
| CN204693427U (en) * | 2015-05-27 | 2015-10-07 | 华帝股份有限公司 | Fire distributor for gas stove |
| CN104930516A (en) * | 2015-06-24 | 2015-09-23 | 宁波方太厨具有限公司 | Combustor fire cover |
| CN106152129A (en) * | 2016-08-03 | 2016-11-23 | 宁波方太厨具有限公司 | A kind of cooker burner |
| CN106500095A (en) * | 2016-11-18 | 2017-03-15 | 宁波方太厨具有限公司 | A kind of burner for gas-cooker |
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| CN110966604A (en) | 2020-04-07 |
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