CN212565885U - Burner fire cover and stove burner - Google Patents

Abstract

The utility model discloses a combustor fire lid and combustor, include: the fire cover comprises a fire cover base, a first fire groove and a second fire groove are formed in the fire cover base; the fire cover base is covered with the partition plate, the partition plate and the fire cover base form a first mixing cavity, the first fire groove is communicated with the first mixing cavity, a third fire groove is formed in the partition plate, and the third fire groove is communicated with the second fire groove in a right-to-right mode; the cover plate is arranged on the fire cover base and the partition plate, a second mixing cavity is formed between the cover plate and the partition plate, and the third fire groove is communicated with the second mixing cavity. This embodiment constitutes combustor fire lid through fire lid base, baffle and apron, and combustor fire lid is many removable structures that trade, and the structure becomes simple for it is more convenient to process, reduction in production cost effectively. Meanwhile, the burner fire cover of the embodiment is provided with the first mixing cavity and the second mixing cavity, so that the combustion of various gases with different concentrations can be realized, and the generation of nitrogen oxides can be inhibited.

Description

Burner fire cover and stove burner

Technical Field

The utility model relates to a gas field, in particular to a burner fire lid for cooking utensils to and adopt this fire lid's cooking utensils combustor.

Background

The existing burner fire cover mostly adopts an integrated structure, the fire hole on the burner fire cover is a circular fire hole obtained by drilling, and the processing difficulty is high. Especially when need set up two kinds or more than two kinds of different fire holes on combustor fire lid, adopt the integral type structure can make combustor fire lid structure too complicated, improve the production degree of difficulty and cost, and the processing mode of drilling can further increase the degree of difficulty of production and processing. Therefore, further improvements in the structure of existing burner fire covers are needed to simplify the production of burner fire covers.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a combustor fire lid for burning kitchen, simple structure, the production and processing of being convenient for.

Furthermore, the utility model discloses still provide an use the combustor that has above-mentioned fire lid.

According to the utility model discloses a combustor fire lid for combustion stove of first aspect embodiment includes: the fire cover comprises an annular fire cover base, wherein a first fire groove and a second fire groove which penetrate through the inner side and the outer side and are provided with upward openings are formed in the fire cover base; the fire cover comprises a fire cover base, an annular partition plate, a first fire groove, a second fire groove and a fire cover base, wherein the fire cover base is covered by the annular partition plate, a first mixing cavity is formed between the partition plate and the fire cover base, the first fire groove is communicated with the first mixing cavity, a third fire groove which penetrates through the inner side and the outer side and is provided with an upward opening is formed in the partition plate, and the third fire groove is communicated with the second fire groove in a right-to-right mode; the cover plate is covered on the fire cover base and the partition plate, a second mixing cavity is formed by the cover plate and the partition plate, and the third fire groove is communicated with the second mixing cavity; wherein the cover plate or the partition plate and the first fire groove are enclosed to form a first fire hole; the cover plate and the second fire groove are enclosed to form a second fire hole.

According to the utility model discloses combustor fire lid has following beneficial effect at least: this embodiment constitutes combustor fire lid through fire lid base, baffle and apron, and combustor fire lid is many removable structures that trade, and the structure becomes simple for it is more convenient to process, reduction in production cost effectively. The cover plate or the partition plate and the first fire groove are encircled to form a first fire hole, the cover plate and the second fire groove are encircled to form a second fire hole, and the fire hole is formed in such a way, a cutting process can be used for forming the fire groove, so that the fire hole is formed by encircling the cover plate or the partition plate, and the difficulty is low in a direct drilling way; simultaneously, the combustor fire lid of this embodiment is provided with first hybrid chamber and second hybrid chamber, and is provided with first fire groove and second fire groove and communicates first hybrid chamber and second hybrid chamber respectively, can realize the gas combustion that multiple gas concentration differs to this restraines nitrogen oxide's formation.

According to the burner fire cover of the first aspect of the present invention, the first fire grooves and the second fire grooves are arranged at intervals. One of the slotted holes is filled with relatively dense fuel gas to realize dense flame, and the other slotted hole is filled with relatively dilute fuel gas to realize light flame, so that the aim of dense-light combustion is fulfilled in a dense-light alternate mode, and the generation of nitrogen oxides is inhibited.

According to the utility model discloses the first aspect combustor fire lid, set up on the fire lid base and link up inside and outside both sides and the ascending steady flame fire groove of opening, steady flame fire groove is located first fire groove with between the second fire groove, the apron or the baffle with steady flame fire groove encloses to close and is formed with steady flame fire hole. Be provided with steady flame fire groove in this scheme, steady flame fire groove's size is less, and the air current of output is less, and flame is less, and steady flame fire hole interval distribution is between first fire hole and second fire hole, can be fine maintain the stability of firepower.

According to the utility model discloses first aspect combustor fire lid, the baffle with first fire groove encloses to close and is formed with first passageway, the baffle with steady flame fire groove encloses to close and is formed with the steady flame passageway, the entry bore of first passageway is greater than the entry bore of steady flame passageway. The inlet aperture of the flame stabilizing channel is smaller, the entering air flow is smaller, the flame emerging from the flame stabilizing fire hole is smaller, and the effect of stabilizing combustion is achieved.

According to the burner fire cover of the first aspect of the present invention, the first fire hole and the second fire hole are located at the same height. The appearance of the burner fire cover is more neat and beautiful, and the flame is more neat when the slotted hole is burnt.

According to the utility model discloses first aspect the combustor fire lid, the upper end of fire lid base is equipped with annular boss, the baffle lid is established the fire lid base on the annular boss, the up end of baffle with the up end of fire lid base keeps flat, the apron with first fire groove encloses to close to be formed with first fire hole.

According to the utility model discloses the combustor fire lid of first aspect, the apron is cyclic annular, better and fire lid base and baffle cooperate.

According to the utility model discloses first aspect the combustor fire lid, fire lid base with be provided with location structure between the baffle, avoid misplacing between the two through location structure, stop the third fire groove and the uneven condition of second fire groove.

According to the utility model discloses burner fire lid of first aspect, location structure is constant head tank and location strip of mutually supporting. Realize the location between fire lid base and the baffle through constant head tank and location strip, simple structure and be convenient for install.

A burner according to an embodiment of the second aspect of the present invention comprises the burner cap of the first aspect of the present invention; the furnace end is provided with a first lower mixing cavity and a second lower mixing cavity which are independent from each other and provided with upper openings; the burner fire cover is arranged on the burner, the first mixing cavity is connected with the first lower mixing cavity, and the second mixing cavity is connected with the second lower mixing cavity.

According to the utility model discloses combustor has following beneficial effect at least: the combustor of this embodiment adopts above-mentioned combustor fire lid, constitutes combustor fire lid through fire lid base, baffle and apron, and combustor fire lid is many removable structures that trade, and the structure becomes simple for it is more convenient to process, reduction in production cost effectively. The fire holes are formed in a mode that the cover plate or the partition plate is enclosed with the first fire groove to form the first fire hole, and the cover plate and the second fire groove are enclosed to form the second fire hole; simultaneously, the combustor fire lid of this embodiment is provided with first hybrid chamber and second hybrid chamber, and is provided with first fire groove and second fire groove and communicates first hybrid chamber and second hybrid chamber respectively, can realize the gas combustion that multiple gas concentration differs to this restraines nitrogen oxide's formation.

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 view of a burner fire cover of the present invention;

FIG. 2 is a schematic view of the assembled burner fire cover of FIG. 1;

FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken at B-B of FIG. 2;

FIG. 5 is a cross-sectional view at C-C of FIG. 2;

fig. 6 is a schematic structural diagram of an embodiment of a burner provided by the present invention;

fig. 7 is an exploded schematic view of the burner of fig. 6.

The reference numbers illustrate:

a burner fire cover 100;

the fire cover comprises a fire cover base 10, a base main body 11, a base sealing surface 12, a positioning strip 13, a first fire groove 111, a second fire groove 112, a flame stabilizing fire groove 113 and an annular boss 114;

the partition plate 20, the upper sealing surface 21, the lower sealing surface 22, the positioning groove 23 and the third fire groove 211;

a cover plate 30, a cover plate upper sealing surface 31 and a cover plate radial sealing surface 32;

a first channel 41, a flame holding channel 42, a first mixing chamber 43, a second mixing chamber 44;

a first fire hole 51, a second fire hole 52, a flame holding fire hole 53;

the device comprises a furnace end 200, an inner ring mixing cavity 201, a second lower mixing cavity 202, a first lower mixing cavity 203, a secondary air supplementing channel 204 and an injection pipe 210;

inner ring fire lid 300.

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 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 exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, and a plurality of means are two or more. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 and 2, the burner fire cover provided by the present invention is composed of a fire cover base 10, a partition plate 20 and a cover plate 30. Compared with the prior art, the burner fire cover of the embodiment is a plurality of detachable structures, and the structure of each component becomes simple, so that the processing is more convenient, and the production cost is effectively reduced.

Specifically, the fire lid base 10 is annular, and the fire lid base 10 includes a base body 11 located at an upper portion, and a base sealing surface 12 located below the base body 11. The base body 11 is provided with a first fire groove 111 and a second fire groove 112 which penetrate through the inner side and the outer side of the fire cover base 10 and are opened upwards. The partition plate 20 is also annular, the partition plate 20 covers the upper end surface of the fire lid base 10, and the partition plate 20 is provided with an upper sealing surface 21 attached to the inner side surface of the base body 11, and a lower sealing surface 22 located below the upper sealing surface 21 and shrinking inward. The baffle plate 20 and the fire lid base 10 form a first mixing chamber 43 therebetween. As shown in fig. 3, the first mixing chamber 43 is located between the base sealing surface 12 and the lower sealing surface 22. The upper sealing surface 21 of the partition plate 20 is provided with a third fire groove 211 which penetrates through the inner side and the outer side and is opened upwards, and the third fire groove 211 is just opposite to and communicated with the second fire groove 112. The cover plate 30 covers the upper end surfaces of the fire lid base 10 and the partition plate 20. A second mixing chamber 44 is formed between the cover plate 30 and the baffle plate 20. The cover plate 30 includes a cover plate upper sealing surface 31, and an inner edge of the cover plate upper sealing surface 31 extends downward to form a cover plate radial sealing surface 32. The cover plate upper sealing surface 31 and the first fire groove 111 enclose to form a first fire hole 51, the cover plate upper sealing surface 31 and the second fire groove 112 enclose to form a second fire hole 52, and the second mixing chamber 44 is positioned between the lower sealing surface 22 and the cover plate radial sealing surface 32. Adopt apron 30 or baffle 20 and first fire groove 111 to enclose to close and form first fire hole 51, apron 30 and second fire groove 112 enclose to close and form second fire hole 52, so form the mode of fire hole, can use cutting process to form the fire groove to utilize apron 30 or baffle 20 to enclose to close and form the fire hole, the mode of direct drilling relatively, the degree of difficulty is lower.

Referring to fig. 3, the first fire groove 111 is located below the upper sealing surface 21 at an air inlet of the inner side of the fire cover base 10, the first fire groove 111 communicates with the first mixing chamber 43, and the mixed gas in the first mixing chamber 43 is output through the first fire groove 111.

Referring to fig. 4, the second fire groove 112 communicates with the second mixing chamber 44 through the third fire groove 211, and the mixed gas in the second mixing chamber 44 is output through the second fire groove 112.

The burner fire cover of the embodiment is provided with the first mixing chamber 43 and the second mixing chamber 44 through the partition plate 20, and the fire cover base 10 is provided with the first fire groove 111 and the second fire groove 112 which are respectively communicated with the first mixing chamber 43 and the second mixing chamber 44, so that the combustion of various gases with different concentrations can be realized, and the generation of nitrogen oxides can be inhibited.

As shown in fig. 2, in some embodiments of the present invention, the first fire grooves 111 and the second fire grooves 112 are spaced apart. The second fire groove 112 is filled with relatively dense fuel gas to realize dense flame combustion, the first fire groove 111 is filled with relatively weak fuel gas to realize weak flame combustion, and the purpose of dense-weak combustion is achieved in a manner of alternating dense and weak to inhibit the generation of nitrogen oxides.

Referring to fig. 2 and 5, in some embodiments of the present disclosure, the base body 11 is further provided with a flame holding groove 113 which is communicated with the first mixing chamber 43 and has an upward opening, the flame holding groove 113 is located between the first flame holding groove 111 and the second flame holding groove 112, and the cover plate 30 or the partition plate 20 and the flame holding groove 113 enclose to form the flame holding hole 53. Be provided with flame stabilizing fire groove 113 in this scheme, flame stabilizing fire groove 113's size is less, and the air current of output is less, and flame is less, and because flame stabilizing fire groove 113 is located between first fire groove 111 and second fire groove 112, makes flame stabilizing fire hole 53 interval distribution between first fire hole 51 and second fire hole 52, the stability of the maintenance firepower that can be fine.

Further, as shown in fig. 3 and 5, in some embodiments of the present disclosure, the partition plate 20 and the first fire groove 111 enclose to form the first channel 41, the partition plate 20 and the flame holding fire groove 113 enclose to form the flame holding channel 42, and an inlet caliber of the first channel 41 is larger than an inlet caliber of the flame holding channel 42. The flame stabilizing channel 42 has a smaller inlet caliber, the entering air flow is smaller, and the flame emerging from the flame stabilizing fire hole 53 is smaller, so that the effect of stabilizing combustion is achieved.

As shown in fig. 2, in some embodiments of the present solution, the first fire holes 51 and the second fire holes 52 are located at the same height. The appearance of the burner fire cover is more neat and beautiful, and the flame is more neat when the slotted hole is burnt. In addition, in other embodiments, the height positions of the first fire holes 51 and the second fire holes 52 are adjustable, so that more different combinations can be realized.

As shown in fig. 1 and 2, in some embodiments of the present disclosure, the upper end of the fire lid base 10 is provided with an annular boss 114, the partition plate 20 is covered on the annular boss 114 of the fire lid base 10, and the upper end surface of the partition plate 20 is flush with the upper end surface of the fire lid base 10.

Further, in some embodiments of the present disclosure, the cover plate 30 is configured in a ring shape for better cooperation with the fire lid base 10 and the partition plate 20.

It is easy to think that in some embodiments of the present solution, a positioning structure is provided between the fire cover base 10 and the partition plate 20, and the positioning structure prevents the third fire groove from being misaligned with the second fire groove 112.

Further, as shown in fig. 1, in some embodiments of the present solution, the positioning structure is a positioning groove 23 and a positioning strip 13 which are mutually matched, wherein the positioning groove 23 is arranged on the partition board 20, and the positioning strip 13 is arranged on the fire lid base 10. The positioning between the fire cover base 10 and the partition plate 20 is realized through the positioning grooves 23 and the positioning strips 13, the structure is simple, and the installation is convenient. The location structure between fire lid base 10 and baffle 20 is not limited to constant head tank and location strip, adopts the structure of other forms to fix a position between fire lid base 10 and the baffle 20 and still falls into among the protection scope of the utility model.

Referring to fig. 6 and 7, the utility model provides a pair of burner, including furnace end 200, burner fire lid 100 and inner ring fire lid 300, burner fire lid 100 wherein does the utility model discloses the first aspect burner fire lid, the burner of this embodiment adopts above-mentioned burner fire lid 100, constitutes burner fire lid 100 through fire lid base 10, baffle 20 and apron 30, burner fire lid 100 is many removable structures, and the structure becomes simple for processing is more convenient, reduces manufacturing cost effectively.

Specifically, the burner 200 is provided with an inner ring mixing cavity 201, a second lower mixing cavity 202 and a first lower mixing cavity 203, and the second lower mixing cavity 202 is located between the inner ring mixing cavity 201 and the first lower mixing cavity 203. The furnace end 200 is further provided with three injection pipes 210. Referring to fig. 6, the injection pipe 210 is raised by an inclined curved surface and then is respectively and correspondingly communicated with one of the inner ring mixing cavity 201, the second lower mixing cavity 202 or the first lower mixing cavity 203. In this embodiment, the middle injection pipe communicates with the inner ring mixing cavity 201, the left injection pipe communicates with the first lower mixing cavity 203, the right injection pipe communicates with the second lower mixing cavity 202, and the three injection pipes respectively supply air to the respective communicated mixing cavities. Referring to fig. 7, the inner ring fire cover 300 covers the inner ring mixing chamber 201, the burner fire cover 100 covers the second lower mixing chamber 202 and the first lower mixing chamber 203, the first mixing chamber 43 is engaged with the first lower mixing chamber 203, and the second mixing chamber 44 is engaged with the second lower mixing chamber 202. Specifically, the lower end surface of the base main body 11 and the base sealing surface 12 are matched with the outer wall of the first lower mixing chamber 203 for sealing connection, the lower sealing surface 22 of the partition plate 20 is located between the second lower mixing chamber 202 and the first lower mixing chamber 203 to separate the two mixing chambers, and the cover plate radial sealing surface 32 of the cover plate 30 is matched with the inner ring of the second lower mixing chamber 202 for sealing connection. After the burner fire cover 100 is mounted on the burner 200, the first fire groove 111 is communicated with the first mixing chamber 43; the second fire groove 112 and the third fire groove 211 correspond to each other and communicate with the second mixing chamber 44. When the gas burner is used, the first mixing cavity 43 and the second mixing cavity 44 are respectively used for containing gas with different concentrations, so that flames on the first fire holes 51 and the second fire holes 52 which are distributed at intervals are different in shade, the aim of shade combustion is achieved in a mode of alternating shade, and generation of nitrogen oxides is restrained.

Further, the furnace end 200 is further provided with two secondary air supplement channels 204 which are symmetrically distributed, the inlets of the secondary air supplement channels 204 are communicated with the outside, and the outlets of the secondary air supplement channels 204 are located between the inner ring mixing cavity 201 and the second lower mixing cavity 202. After entering the air cavity between the inner ring mixing cavity 201 and the second lower mixing cavity 202 through the secondary air supplement channel 204, the external air can be secondarily mixed with the gas in the inner ring mixing cavity 201, the second lower mixing cavity 202 and the first lower mixing cavity 203, so that the gas can be sufficiently combusted, the heat efficiency is improved, and the energy is saved.

A burner fire cover and a burner using the same according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 7 as specific embodiments. It is to be understood that the following description is illustrative only and is not intended as a specific limitation on the invention.

Referring to fig. 1, the present invention provides a burner cap for a burner, which is composed of a cap base 10, a partition 20 and a cover plate 30.

The fire lid base 10 is ring-shaped, and the fire lid base 10 includes a base body 11 located at an upper portion, and a base sealing surface 12 located below the base body 11. The base body 11 is provided with a first fire groove 111, a second fire groove 112 and a flame holding fire groove 113 which are arranged at an interval from each other. Wherein, the first fire channel 111 is located at the air outlet on the outer side of the fire cover base 10, and the second fire channel 112 is located at the air outlet on the outer side of the fire cover base 10, which are at the same height position. The size of the air outlet of the flame holding fire groove 113 located at the outer side of the fire cover base 10 is smaller than the size of the air outlet of the first fire groove 111 and the second fire groove 112 located at the outer side of the fire cover base 10. In this embodiment, the first fire channel 111, the second fire channel 112 and the flame holding fire channel 113 are strip-shaped channels with openings above and obtained by cutting, and the cutting depth of the first fire channel 111 is greater than that of the second fire channel 112.

The baffle 20 is also annular, the baffle 20 is mounted on the annular boss 114 of the fire lid base 10, and the upper end face of the baffle 20 is flush with the upper end face of the fire lid base 10. The fire lid base 10 and the partition 20 are positioned by the positioning groove 23 and the positioning strip 13. The partition 20 is provided with an upper sealing surface 21 which is fitted to the inner side surface of the base body 11, and a lower sealing surface 22 which is located below the upper sealing surface 21 and is contracted inward. Referring to fig. 3 to 5, the lower sealing surface 22 of the baffle plate 20 divides the mixing chamber of the gas into a first mixing chamber 43 and a second mixing chamber 44. The upper sealing surface 21 of the partition plate 20 is cut with a third fire groove 211, and the third fire groove 211 corresponds to the second fire groove 112.

The cover plate 30 is also annular, and the cover plate 30 includes a cover plate upper sealing surface 31, and the inner edge of the cover plate upper sealing surface 31 extends downward to form a cover plate radial sealing surface 32, as shown in fig. 2, and the cover plate 30 is covered above the fire lid base 10 and the partition plate 20.

Compared with the prior art, the burner fire cover of the embodiment is a plurality of detachable structures, and the structure of each component becomes simple, so that the processing is more convenient, and the production cost is effectively reduced.

Referring to fig. 3 and 5, in the present embodiment, the first fire groove 111 and the flame holding fire groove 113 communicate with the first mixing chamber 43, respectively. Wherein, first fire groove 111 is through the bottom of cutting process straight-open to base main part 11, and the mixed gas in the first mixing chamber 43 can follow up and get into first fire groove 111 fast and export down, and the firepower that the burning produced is great. And the flame holding fire groove 113 does not reach the bottom of the base main body 11, the size of the air inlet is smaller, the mixed gas in the first mixing chamber 43 needs to enter the flame holding fire groove 113 from the side, the air flow is smaller and slower, meanwhile, the size of the air outlet of the flame holding fire groove 113 is smaller, the firepower generated by combustion is smaller, and the effect of stable combustion is achieved. Referring to fig. 4, the second fire groove 112 communicates with the second mixing chamber 44 through the third fire groove 211, and the mixed gas in the second mixing chamber 44 is rapidly output through the second fire groove 112. The burner fire cover of the embodiment is provided with the first mixing chamber 43 and the second mixing chamber 44 through the partition plate 20, and the fire cover base 10 is provided with the first fire groove 111 and the second fire groove 112 which are respectively communicated with the first mixing chamber 43 and the second mixing chamber 44, so that the combustion of various gases with different concentrations can be realized, and the generation of nitrogen oxides can be inhibited.

Referring to fig. 6 and 7, the present invention provides a burner, including a burner head 200, a burner cap 100 and an inner ring cap 300, wherein the burner cap 100 is the burner cap of the first aspect of the present invention. The burner 200 is provided with an inner ring mixing cavity 201, a second lower mixing cavity 202 and a first lower mixing cavity 203, and the second lower mixing cavity 202 is located between the inner ring mixing cavity 201 and the first lower mixing cavity 203. The furnace end 200 is further provided with three injection pipes 210. As shown in fig. 3, the injection pipe 210 rises through an inclined curved surface and is respectively and correspondingly communicated with one of the inner ring mixing cavity 201, the second lower mixing cavity 202 or the first lower mixing cavity 203. In this embodiment, the middle injection pipe communicates with the inner ring mixing cavity 201, the left injection pipe communicates with the first lower mixing cavity 203, the right injection pipe communicates with the second lower mixing cavity 202, and the three injection pipes respectively supply air to the respective communicated mixing cavities. Referring to fig. 7, the inner ring fire cover 300 covers the inner ring mixing chamber 201, the burner fire cover 100 covers the second lower mixing chamber 202 and the first lower mixing chamber 203, the first mixing chamber 43 is engaged with the first lower mixing chamber 203, and the second mixing chamber 44 is engaged with the second lower mixing chamber 202. Specifically, the lower end surface of the base main body 11 and the base sealing surface 12 are matched with the outer wall of the first lower mixing chamber 203 for sealing connection, the lower sealing surface 22 of the partition plate 20 is located between the second lower mixing chamber 202 and the first lower mixing chamber 203 to separate the two mixing chambers, and the cover plate radial sealing surface 32 of the cover plate 30 is matched with the inner ring of the second lower mixing chamber 202 for sealing connection. After the burner fire cover 100 is mounted on the burner 200, the first fire groove 111 is communicated with the first mixing chamber 43; the second fire groove 112 and the third fire groove 211 correspond to each other and communicate with the second mixing chamber 44. When the gas burner is used, the first mixing cavity 43 and the second mixing cavity 44 are respectively used for containing gas with different concentrations, so that flames on the first fire holes 51 and the second fire holes 52 which are distributed at intervals are different in shade, the aim of shade combustion is achieved in a mode of alternating shade, and generation of nitrogen oxides is restrained.

Further, the furnace end 200 is further provided with two secondary air supplement channels 204 which are symmetrically distributed, the inlets of the secondary air supplement channels 204 are communicated with the outside, and the outlets of the secondary air supplement channels 204 are located between the inner ring mixing cavity 201 and the second lower mixing cavity 202. After entering the air cavity between the inner ring mixing cavity 201 and the second lower mixing cavity 202 through the secondary air supplement channel 204, the external air can be secondarily mixed with the gas in the inner ring mixing cavity 201, the second lower mixing cavity 202 and the first lower mixing cavity 203, so that the gas can be sufficiently combusted, the heat efficiency is improved, and the energy is saved.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 present 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.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. Burner cap for a cooking appliance, comprising:

the fire cover comprises an annular fire cover base (10), wherein a first fire groove (111) and a second fire groove (112) which penetrate through the inner side and the outer side and are provided with upward openings are formed in the fire cover base (10);

the fire cover comprises a fire cover base (10), an annular partition plate (20) and a fire cover base (10), wherein a first mixing cavity (43) is formed between the partition plate (20) and the fire cover base (10), the first fire groove (111) is communicated with the first mixing cavity (43), a third fire groove (211) which penetrates through the inner side and the outer side and is provided with an upward opening is formed in the partition plate (20), and the third fire groove (211) is communicated with the second fire groove (112) in a right-to-top mode;

the cover plate (30) is covered on the fire cover base (10) and the partition plate (20), a second mixing cavity (44) is formed between the cover plate (30) and the partition plate (20), and the third fire groove (211) is communicated with the second mixing cavity (44);

wherein the cover plate (30) or the partition plate (20) and the first fire groove (111) enclose to form a first fire hole (51); the cover plate (30) and the second fire groove (112) are enclosed to form a second fire hole (52).

2. Burner fire cover according to claim 1, characterised in that the first fire channel (111) and the second fire channel (112) are arranged at a distance.

3. The burner fire cover according to claim 2, characterized in that the fire cover base (10) is provided with a flame holding fire groove (113) which penetrates through the inner side and the outer side and has an upward opening, the flame holding fire groove (113) is located between the first fire groove (111) and the second fire groove (112), and the cover plate (30) or the partition plate (20) and the flame holding fire groove (113) are enclosed to form a flame holding fire hole (53).

4. The burner fire cover according to claim 3, characterized in that the partition (20) and the first fire groove (111) are enclosed to form a first channel (41), the partition (20) and the flame holding fire groove (113) are enclosed to form a flame holding channel (42), and the inlet caliber of the first channel (41) is larger than that of the flame holding channel (42).

5. Burner fire cover according to claim 2, characterised in that the first fire holes (51) and the second fire holes (52) are located at the same height.

6. The burner fire cover according to claim 1, characterized in that the upper end of the fire cover base (10) is provided with an annular boss (114), the partition (20) is covered on the annular boss (114) of the fire cover base (10), the upper end surface of the partition (20) is flush with the upper end surface of the fire cover base (10), and the cover plate (30) and the first fire slot (111) enclose to form the first fire hole (51).

7. Burner fire cover according to claim 1, characterised in that the cover plate (30) is ring-shaped.

8. Burner fire cover according to claim 1, characterised in that a positioning structure is provided between the fire cover base (10) and the partition (20).

9. Burner fire cover according to claim 8, characterised in that the positioning structure is a positioning groove (23) and a positioning strip (13) cooperating with each other.

10. A cooktop burner, comprising:

the burner fire cover (100) of any of claims 1-9; and

the burner (200) is provided with a first lower mixing cavity (202) and a second lower mixing cavity (203) which are independent from each other and provided with upper openings;

wherein the burner cap (100) is arranged on the burner (200), the first mixing chamber (43) is engaged with the first lower mixing chamber (202), and the second mixing chamber (44) is engaged with the second lower mixing chamber (203).

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