Burner caps and stove burners

Abstract

The present invention discloses a burner fire cover and a burner, including: a fire cover base, a first fire groove and a second fire groove are provided on the fire cover base; a partition plate is provided on the fire cover base, the partition plate and the fire cover base form a first mixing chamber, the first fire groove is connected to the first mixing chamber, a third fire groove is provided on the partition plate, the third fire groove is directly connected to the second fire groove; a cover plate is provided on the fire cover base and the partition plate, the cover plate and the partition plate form a second mixing chamber, and the third fire groove is connected to the second mixing chamber. In this embodiment, the burner fire cover is composed of a fire cover base, a partition plate and a cover plate. The burner fire cover is a detachable multi-piece structure, the structure becomes simple, the processing is more convenient, and the production cost is effectively reduced. At the same time, the burner fire cover of this embodiment is provided with a first mixing chamber and a second mixing chamber, which can realize the combustion of multiple gases with different gas concentrations, thereby suppressing the generation of nitrogen oxides.

Description

Technical Field

[0001] The invention relates to the field of gas, and in particular to a burner fire cover for a stove, and a stove burner using the fire cover. Background Art

[0002] Most of the existing burner fire covers adopt an integrated structure, and the fire holes on the burner fire covers are circular fire holes obtained by drilling, which is difficult to process. Especially when it is necessary to set two or more different fire holes on the burner fire cover, the use of an integrated structure will make the burner fire cover structure too complicated, increase the production difficulty and cost, and the drilling processing method will further increase the difficulty of production and processing. Therefore, in order to simplify the production of burner fire covers, it is necessary to further improve the structure of the existing burner fire cover. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a burner fire cover for a combustion stove, which has a simple structure and is easy to produce and process.

[0004] In addition, the present invention also provides a burner using the above-mentioned fire cover.

[0005] According to the first aspect of the present invention, a burner fire cover for a combustion stove comprises: an annular fire cover base, on which a first fire groove and a second fire groove are formed, which are connected to both sides inside and outside and open upward; an annular partition plate is covered on the fire cover base, and the partition plate and the fire cover base form a first mixing chamber, and the first fire groove is connected to the first mixing chamber, and a third fire groove is formed on the partition plate, which is connected to both sides inside and outside and open upward, and the third fire groove is directly connected to the second fire groove; a cover plate is covered on the fire cover base and the partition plate, and the cover plate and the partition plate form a second mixing chamber, and the third fire groove is connected to the second mixing chamber; 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.

[0006] The burner fire cover according to the embodiment of the present invention has at least the following beneficial effects: the burner fire cover of the embodiment is composed of a fire cover base, a partition and a cover plate. The burner fire cover is a detachable multi-piece structure, which makes the structure simple, making the processing more convenient and effectively reducing the production cost. The cover plate or the partition is used to enclose the first fire groove to form a first fire hole, and the cover plate and the second fire groove are used to enclose the second fire hole. The fire hole is formed in this way. The fire groove can be formed by cutting, so that the cover plate or the partition is used to enclose the fire hole. Compared with the direct drilling method, the difficulty is lower; at the same time, the burner fire cover of the embodiment is provided with a first mixing chamber and a second mixing chamber, and the first fire groove and the second fire groove are provided to connect the first mixing chamber and the second mixing chamber respectively, which can realize the combustion of multiple gases with different gas concentrations, thereby suppressing the generation of nitrogen oxides.

[0007] According to the burner fire cover of the first aspect of the present invention, the first fire groove and the second fire groove are arranged at intervals. A relatively dense gas is passed through one of the slots to realize a dense flame, and a relatively light gas is passed through the other slot to realize a light flame, so that the purpose of dense and light combustion is achieved in the form of alternating dense and light, thereby suppressing the generation of nitrogen oxides.

[0008] According to the burner fire cover of the first aspect of the present invention, a flame stabilizing groove that penetrates both sides and opens upward is provided on the fire cover base, the flame stabilizing groove is located between the first and second flame grooves, and the cover plate or the partition plate and the flame stabilizing groove are surrounded to form flame stabilizing holes. In this solution, the flame stabilizing groove is provided, the size of the flame stabilizing groove is small, the output airflow is small, the flame is small, and the flame stabilizing holes are distributed between the first and second flame holes at intervals, which can well maintain the stability of the firepower.

[0009] According to the burner fire cover of the first aspect of the present invention, the partition plate and the first fire groove are enclosed to form a first channel, the partition plate and the flame stabilizing fire groove are enclosed to form a flame stabilizing channel, and the inlet diameter of the first channel is larger than the inlet diameter of the flame stabilizing channel. The inlet diameter of the flame stabilizing channel is smaller, the airflow entering is smaller, and the flame emerging from the flame stabilizing fire hole is smaller, which plays a role in stabilizing combustion.

[0010] 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, so that the burner fire cover has a more neat and beautiful appearance, and the flames are more neat when burning in the slots.

[0011] According to the burner fire cover described in the first aspect of the present invention, an annular boss is provided at the upper end of the fire cover base, the partition cover is provided on the annular boss of the fire cover base, the upper end surface of the partition is flush with the upper end surface of the fire cover base, and the cover plate and the first fire groove enclose the first fire hole.

[0012] According to the burner fire cover described in the first aspect of the present invention, the cover plate is annular and better matches with the fire cover base and the partition plate.

[0013] According to the burner fire cover of the first aspect of the present invention, a positioning structure is provided between the fire cover base and the partition plate, and the positioning structure is used to avoid misalignment between the two and prevent the third fire groove from being misaligned with the second fire groove.

[0014] According to the burner fire cover of the first aspect of the present invention, the positioning structure is a positioning groove and a positioning strip that cooperate with each other. The positioning groove and the positioning strip are used to achieve positioning between the fire cover base and the partition plate, and the structure is simple and easy to install.

[0015] A burner according to an embodiment of the second aspect of the present invention comprises the burner fire cover as described in the first aspect of the present invention; and a burner head, wherein the burner head is provided with a first lower mixing chamber and a second lower mixing chamber which are independent of each other and have an upper opening; the burner fire cover is provided on the burner head, the first mixing chamber is connected to the first lower mixing chamber, and the second mixing chamber is connected to the second lower mixing chamber.

[0016] The burner according to the embodiment of the present invention has at least the following beneficial effects: the burner of the embodiment adopts the above-mentioned burner fire cover, and the burner fire cover is composed of a fire cover base, a partition and a cover plate. The burner fire cover is a detachable multi-piece structure, and the structure becomes simple, making the processing more convenient, and effectively reducing the production cost. The cover plate or partition is used to enclose the first fire groove to form the first fire hole, and the cover plate and the second fire groove are used to enclose the second fire hole. The fire hole is formed in this way, and the fire groove can be formed by cutting technology, so that the fire hole is formed by enclosing the cover plate or partition. Compared with the direct drilling method, the difficulty is lower; at the same time, the burner fire cover of the embodiment is provided with a first mixing chamber and a second mixing chamber, and the first fire groove and the second fire groove are provided to connect the first mixing chamber and the second mixing chamber respectively, which can realize the combustion of multiple gases with different gas concentrations, thereby suppressing the generation of nitrogen oxides.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a schematic diagram of the burner fire cover structure of the present invention;

[0020] Figure 2 yes Figure 1 A schematic diagram of the structure of the burner fire cover after assembly;

[0021] Figure 3 yes Figure 2 Sectional view at AA in the middle;

[0022] Figure 4 yes Figure 2 Sectional view at the middle BB;

[0023] Figure 5 yes Figure 2 Sectional view at CC;

[0024] Figure 6 It is a structural schematic diagram of a burner embodiment provided by the present invention;

[0025] Figure 7 yes Figure 6 Schematic diagram of the explosion of the burner.

[0026] Description of Figure Numbers:

[0027] Burner fire cover 100;

[0028] The fire cover base 10, the base body 11, the base sealing surface 12, the positioning strip 13, the first fire groove 111, the second fire groove 112, the flame stabilizing fire groove 113, and the annular boss 114;

[0029] Partition plate 20, upper sealing surface 21, lower sealing surface 22, positioning groove 23, third fire groove 211;

[0030] Cover plate 30, cover plate upper sealing surface 31, cover plate radial sealing surface 32;

[0031] A first channel 41, a flame stabilizing channel 42, a first mixing chamber 43, and a second mixing chamber 44;

[0032] A first fire hole 51, a second fire hole 52, and a flame stabilizing fire hole 53;

[0033] Burner head 200, inner ring mixing chamber 201, second lower mixing chamber 202, first lower mixing chamber 203, secondary air supplement channel 204, ejector tube 210;

[0034] Inner ring fire cover 300. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 therefore should not be understood as a limitation on the present invention.

[0037] In the description of the present invention, "several" means one or more, and "more" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0038] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0039] Reference Figure 1 , Figure 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 this embodiment is a detachable multi-piece structure, and the structure of each component becomes simple, making the processing more convenient and effectively reducing the production cost.

[0040] Specifically, the fire cover base 10 is annular, and the fire cover base 10 includes a base body 11 located at the upper part, 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 that penetrate the inner and outer sides of the fire cover base 10 and are open upward. The partition 20 is also annular, and the partition 20 is covered on the upper end surface of the fire cover base 10. The partition 20 is provided with an upper sealing surface 21 that fits with the inner side surface of the base body 11, and a lower sealing surface 22 that is located below the upper sealing surface 21 and shrinks inward. A first mixing chamber 43 is formed between the partition 20 and the fire cover base 10. Figure 3As shown, 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 20 is provided with a third fire groove 211 that penetrates both sides and opens upward, and the third fire groove 211 is directly connected with the second fire groove 112. The cover plate 30 is covered on the upper end surface of the fire cover base 10 and the partition 20. A second mixing chamber 44 is formed between the cover plate 30 and the partition 20. The cover plate 30 includes a sealing surface 31 on the cover plate, and the inner edge of the sealing surface 31 on the cover plate extends downward to form a radial sealing surface 32 of the cover plate. The sealing surface 31 on the cover plate and the first fire groove 111 are enclosed to form a first fire hole 51, and the sealing surface 31 on the cover plate and the second fire groove 112 are enclosed to form a second fire hole 52, and the second mixing chamber 44 is located between the lower sealing surface 22 and the radial sealing surface 32 of the cover plate. The cover plate 30 or the partition plate 20 is used to enclose the first fire groove 111 to form the first fire hole 51, and the cover plate 30 and the second fire groove 112 are used to enclose the second fire hole 52. The fire holes are formed in this way. The fire grooves can be formed by cutting technology, and the fire holes are formed by enclosing the cover plate 30 or the partition plate 20. Compared with the direct drilling method, it is less difficult.

[0041] Reference Figure 3 The air inlet of the first fire groove 111 on the inner side of the fire cover base 10 is located below the upper sealing surface 21 . The first fire groove 111 is connected to the first mixing chamber 43 , and the mixed gas in the first mixing chamber 43 is output through the first fire groove 111 .

[0042] Reference Figure 4 The second fire groove 112 is connected to 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 .

[0043] The burner fire cover of this embodiment is provided with a first mixing chamber 43 and a second mixing chamber 44 through a partition plate 20, and the fire cover base 10 is provided with a first fire groove 111 and a second fire groove 112 which are connected to the first mixing chamber 43 and the second mixing chamber 44 respectively, so that combustion of multiple gases with different gas concentrations can be realized, thereby suppressing the generation of nitrogen oxides.

[0044] like Figure 2 As shown, in some embodiments of the present invention, the first fire groove 111 and the second fire groove 112 are arranged alternately. The second fire groove 112 is filled with relatively dense gas to achieve dense flame combustion, and the first fire groove 111 is filled with relatively thin gas to achieve thin flame combustion, so as to achieve the purpose of dense and thin combustion in the form of dense and thin alternation, thereby suppressing the generation of nitrogen oxides.

[0045] Reference Figure 2 and Figure 5In some embodiments of the present invention, a flame stabilizing groove 113 connected to the first mixing chamber 43 and opening upward is further provided on the base body 11. The flame stabilizing groove 113 is located between the first fire groove 111 and the second fire groove 112. The cover plate 30 or the partition plate 20 and the flame stabilizing groove 113 are enclosed to form a flame stabilizing hole 53. In the present invention, the flame stabilizing groove 113 is provided. The size of the flame stabilizing groove 113 is small, the output airflow is small, and the flame is small. Moreover, since the flame stabilizing groove 113 is located between the first fire groove 111 and the second fire groove 112, the flame stabilizing holes 53 are distributed between the first fire hole 51 and the second fire hole 52 at intervals, which can well maintain the stability of the firepower.

[0046] Further, such as Figure 3 and Figure 5 As shown, in some embodiments of the present scheme, the partition 20 and the first fire groove 111 are enclosed to form a first channel 41, and the partition 20 and the flame stabilizing fire groove 113 are enclosed to form a flame stabilizing channel 42, and the inlet diameter of the first channel 41 is larger than the inlet diameter of the flame stabilizing channel 42. The inlet diameter of the flame stabilizing channel 42 is smaller, the airflow entering is smaller, and the flame emerging from the flame stabilizing fire hole 53 is smaller, which plays a role in stabilizing combustion.

[0047] like Figure 2 As shown, in some embodiments of the present invention, the first fire hole 51 and the second fire hole 52 are located at the same height. This makes the burner cover look more neat and beautiful, and the flames burn more neatly in the slots. In addition, in other embodiments, the height positions of the first fire hole 51 and the second fire hole 52 are adjustable, so that more different combinations can be achieved.

[0048] like Figure 1 and Figure 2 As shown, in some embodiments of the present scheme, an annular boss 114 is provided at the upper end of the fire cover base 10, and the partition plate 20 is covered on the annular boss 114 of the fire cover base 10, and the upper end surface of the partition plate 20 is flush with the upper end surface of the fire cover base 10.

[0049] Furthermore, in some embodiments of the present solution, in order to better cooperate with the fire cover base 10 and the partition plate 20, the cover plate 30 is configured to be annular.

[0050] It is easy to imagine that in some embodiments of the present scheme, a positioning structure is provided between the fire cover base 10 and the partition plate 20, and the positioning structure is used to avoid misalignment between the two and prevent the third fire groove from being misaligned with the second fire groove 112.

[0051] Further, if Figure 1As shown, in some embodiments of the present invention, the positioning structure is a positioning groove 23 and a positioning strip 13 that cooperate with each other, wherein the positioning groove 23 is arranged on the partition 20, and the positioning strip 13 is arranged on the fire cover base 10. The positioning between the fire cover base 10 and the partition 20 is achieved by the positioning groove 23 and the positioning strip 13, and the structure is simple and easy to install. The positioning structure between the fire cover base 10 and the partition 20 is not limited to the positioning groove and the positioning strip. The positioning between the fire cover base 10 and the partition 20 using other forms of structures still falls within the protection scope of the present invention.

[0052] Reference Figure 6 and Figure 7 The present invention provides a burner, comprising a burner head 200, a burner fire cover 100 and an inner ring fire cover 300, wherein the burner fire cover 100 is the burner fire cover described in the first aspect of the present invention. The burner of this embodiment adopts the above-mentioned burner fire cover 100, and the burner fire cover 100 is composed of a fire cover base 10, a partition plate 20 and a cover plate 30. The burner fire cover 100 is a detachable multi-piece structure, the structure becomes simple, the processing is more convenient, and the production cost is effectively reduced.

[0053] Specifically, the furnace head 200 is provided with an inner ring mixing chamber 201, a second lower mixing chamber 202 and a first lower mixing chamber 203, and the second lower mixing chamber 202 is located between the inner ring mixing chamber 201 and the first lower mixing chamber 203. The furnace head 200 is also provided with three ejector tubes 210. Figure 6 After the ejector tube 210 rises on the inclined surface, it is connected to one of the inner ring mixing chamber 201, the second lower mixing chamber 202 or the first lower mixing chamber 203. In this embodiment, the ejector tube in the middle is connected to the inner ring mixing chamber 201, the ejector tube on the left is connected to the first lower mixing chamber 203, and the ejector tube on the right is connected to the second lower mixing chamber 202. The three ejector tubes supply gas to the mixing chambers they are connected to. Figure 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 connected to the first lower mixing chamber 203, and the second mixing chamber 44 is connected to the second lower mixing chamber 202. Specifically, the lower end surface of the base body 11 and the base sealing surface 12 cooperate with the outer wall of the first lower mixing chamber 203 for sealing connection, the lower sealing surface 22 of the partition 20 is located between the second lower mixing chamber 202 and the first lower mixing chamber 203, so that the two mixing chambers are separated, and the cover plate radial sealing surface 32 of the cover plate 30 cooperates with the inner ring of the second lower mixing chamber 202 for sealing connection. After the burner fire cover 100 is installed on the burner head 200, the first fire groove 111 is connected to the first mixing chamber 43; the second fire groove 112 corresponds to the third fire groove 211 and is connected to the second mixing chamber 44. When in use, the first mixing chamber 43 and the second mixing chamber 44 contain different concentrations of fuel gas respectively, so that the flames on the first fire holes 51 and the second fire holes 52 distributed at intervals appear different in thickness, and the purpose of thick and thin combustion is achieved in the form of alternating thick and thin, thereby suppressing the formation of nitrogen oxides.

[0054] Furthermore, two symmetrically distributed secondary air supplement channels 204 are provided on the burner head 200, the inlet of the secondary air supplement channel 204 is connected to the outside, and the outlet of the secondary air supplement channel 204 is located between the inner ring mixing chamber 201 and the second lower mixing chamber 202. After the outside air enters the air cavity between the inner ring mixing chamber 201 and the second lower mixing chamber 202 through the secondary air supplement channel 204, it can be secondary mixed with the gas in the inner ring mixing chamber 201, the second lower mixing chamber 202 and the first lower mixing chamber 203 respectively, so that the gas can be fully burned, the thermal efficiency is improved, and energy is saved.

[0055] Reference below Figures 1 to 7 The burner fire cover and the burner using the fire cover according to the embodiment of the present invention are described in detail with specific embodiments. It is worth noting that the following description is only for illustrative purposes and is not a specific limitation of the invention.

[0056] Reference Figure 1 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.

[0057] The fire cover base 10 is annular, and includes a base body 11 located at the top, 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-stabilizing fire groove 113 arranged at intervals from each other. Among them, the first fire groove 111 is located at the air outlet outside the fire cover base 10, and the second fire groove 112 is located at the air outlet outside the fire cover base 10, and is at the same height position. The size of the air outlet of the flame-stabilizing fire groove 113 located outside 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 outside the fire cover base 10. In this embodiment, the first fire groove 111, the second fire groove 112, and the flame-stabilizing fire groove 113 are all strip grooves with an upper opening obtained by cutting, and the cutting depth of the first fire groove 111 is greater than that of the second fire groove 112.

[0058] The partition plate 20 is also annular and is mounted on the annular boss 114 of the fire cover base 10, and the upper end surface of the partition plate 20 is flush with the upper end surface of the fire cover base 10. The fire cover base 10 and the partition plate 20 are positioned by the positioning groove 23 and the positioning strip 13. The partition plate 20 is provided with an upper sealing surface 21 that matches the inner side surface of the base body 11, and a lower sealing surface 22 that is located below the upper sealing surface 21 and shrinks inward. Figures 3 to 5 The lower sealing surface 22 of the partition 20 divides the gas mixing chamber into a first mixing chamber 43 and a second mixing chamber 44. A third fire groove 211 is cut on the upper sealing surface 21 of the partition 20, and the third fire groove 211 corresponds to the position of the second fire groove 112.

[0059] The cover plate 30 is also annular and includes a cover plate sealing surface 31. The inner edge of the cover plate sealing surface 31 extends downward to form a cover plate radial sealing surface 32. Figure 2 As shown, the cover plate 30 covers the fire cover base 10 and the partition plate 20 .

[0060] Compared with the prior art, the burner fire cover of this embodiment is a detachable multi-piece structure, and the structure of each component becomes simple, making the processing more convenient and effectively reducing the production cost.

[0061] Reference Figure 3 and Figure 5In this embodiment, the first fire groove 111 and the flame-stabilizing fire groove 113 are connected to the first mixing chamber 43 respectively. Among them, the first fire groove 111 is cut directly to the bottom of the base body 11, and the mixed gas in the first mixing chamber 43 can quickly enter the first fire groove 111 from bottom to top and be output, and the fire power generated by the combustion is relatively large. However, the flame-stabilizing fire groove 113 does not reach the bottom of the base body 11, and the air inlet size is relatively small. The mixed gas in the first mixing chamber 43 needs to enter the flame-stabilizing fire groove 113 from the side, and the air flow is relatively small and slow. At the same time, the air outlet size of the flame-stabilizing fire groove 113 is relatively small, and the fire power generated by the combustion is relatively small, which plays a role in stabilizing the combustion. Refer to Figure 4 The second fire groove 112 is connected to the second mixing chamber 44 through the third fire groove 211, and the mixed gas in the second mixing chamber 44 is quickly output through the second fire groove 112. The burner fire cover of this embodiment is provided with the first mixing chamber 43 and the second mixing chamber 44 through the partition 20, and the fire cover base 10 is provided with the first fire groove 111 and the second fire groove 112 respectively connected to the first mixing chamber 43 and the second mixing chamber 44, which can realize the combustion of multiple gases with different concentrations, thereby suppressing the generation of nitrogen oxides.

[0062] Reference Figure 6 and Figure 7 The present invention provides a burner, comprising a burner head 200, a burner fire cover 100 and an inner ring fire cover 300, wherein the burner fire cover 100 is the burner fire cover described in the first aspect of the present invention. The burner head 200 is provided with an inner ring mixing chamber 201, a second lower mixing chamber 202 and a first lower mixing chamber 203, wherein the second lower mixing chamber 202 is located between the inner ring mixing chamber 201 and the first lower mixing chamber 203. The burner head 200 is also provided with three ejector tubes 210. Figure 3 As shown, after the ejector tube 210 rises on the inclined surface, it is respectively connected to one of the inner ring mixing chamber 201, the second lower mixing chamber 202 or the first lower mixing chamber 203. In this embodiment, the ejector tube located in the middle is connected to the inner ring mixing chamber 201, the ejector tube located on the left is connected to the first lower mixing chamber 203, and the ejector tube located on the right is connected to the second lower mixing chamber 202. The three ejector tubes supply gas to the mixing chambers they are connected to. Figure 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 connected to the first lower mixing chamber 203, and the second mixing chamber 44 is connected to the second lower mixing chamber 202. Specifically, the lower end surface of the base body 11 and the base sealing surface 12 cooperate with the outer wall of the first lower mixing chamber 203 for sealing connection, the lower sealing surface 22 of the partition 20 is located between the second lower mixing chamber 202 and the first lower mixing chamber 203, so that the two mixing chambers are separated, and the cover plate radial sealing surface 32 of the cover plate 30 cooperates with the inner ring of the second lower mixing chamber 202 for sealing connection. After the burner fire cover 100 is installed on the burner head 200, the first fire groove 111 is connected to the first mixing chamber 43; the second fire groove 112 corresponds to the third fire groove 211 and is connected to the second mixing chamber 44. When in use, the first mixing chamber 43 and the second mixing chamber 44 contain different concentrations of fuel gas respectively, so that the flames on the first fire holes 51 and the second fire holes 52 distributed at intervals appear different in thickness, and the purpose of thick and thin combustion is achieved in the form of alternating thick and thin, thereby suppressing the formation of nitrogen oxides.

[0063] Furthermore, two symmetrically distributed secondary air supplement channels 204 are provided on the burner head 200, the inlet of the secondary air supplement channel 204 is connected to the outside, and the outlet of the secondary air supplement channel 204 is located between the inner ring mixing chamber 201 and the second lower mixing chamber 202. After the outside air enters the air cavity between the inner ring mixing chamber 201 and the second lower mixing chamber 202 through the secondary air supplement channel 204, it can be secondary mixed with the gas in the inner ring mixing chamber 201, the second lower mixing chamber 202 and the first lower mixing chamber 203 respectively, so that the gas can be fully burned, the thermal efficiency is improved, and energy is saved.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0065] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A burner fire cover for a stove, characterized in that: include: An annular fire cover base (10), the fire cover base (10) being provided with a first fire groove (111) and a second fire groove (112) penetrating both sides and opening upward, the cutting depth of the inner side wall of the first fire groove (111) being greater than the cutting depth of the inner side wall of the second fire groove (112), the fire cover base (10) comprising a base body (11) located at an upper portion, and a base sealing surface (12) located below the base body (11); An annular partition (20) is disposed on the fire cover base (10), the partition (20) being provided with an upper sealing surface (21) in contact with the inner side surface of the base body (11), and a lower sealing surface (22) located below the upper sealing surface (21) and contracted inwardly, the partition (20) and the fire cover base (10) forming a first mixing chamber (43), the first mixing chamber (43) being located between the base sealing surface (12) and the lower sealing surface (22), the first fire groove (111) being connected to the first mixing chamber (43), the partition (20) being provided with a third fire groove (211) penetrating both inner and outer sides and opening upward, the third fire groove (211) being directly connected to the second fire groove (112); a cover plate (30) disposed on the fire cover base (10) and the partition plate (20), the cover plate (30) comprising a cover plate upper sealing surface (31), the inner edge of the cover plate sealing surface (31) extending downward to form a cover plate radial sealing surface (32), the cover plate (30) and the partition plate (20) forming a second mixing chamber (44), the second mixing chamber (44) being located between the lower sealing surface (22) and the cover plate radial sealing surface (32), and the third fire groove (211) being connected to the second mixing chamber (44); The cover plate (30) or the partition plate (20) and the first fire groove (111) are enclosed to form a first fire hole (51); and the cover plate (30) and the second fire groove (112) are enclosed to form a second fire hole (52).

2. The burner cap according to claim 1, characterized in that: The first fire groove (111) and the second fire groove (112) are arranged at intervals.

3. The burner fire cover according to claim 2, characterized in that: The fire cover base (10) is provided with a flame stabilizing groove (113) which passes through both sides and opens upward, the flame stabilizing groove (113) is connected to the first mixing chamber (43), the flame stabilizing groove (113) is located between the first fire groove (111) and the second fire groove (112), the cutting depth of the inner side of the flame stabilizing groove (113) is greater than the cutting depth of the outer side of the flame stabilizing groove (113), and the cover plate (30) or the partition plate (20) and the flame stabilizing groove (113) are enclosed to form a flame stabilizing hole (53).

4. The burner cap according to claim 3, characterized in that: The lower sealing surface (22) and the first fire groove (111) are enclosed to form a first channel (41), and the lower sealing surface (22) and the flame-stabilizing fire groove (113) are enclosed to form a flame-stabilizing channel (42), and the cutting depth of the inner side wall of the first fire groove (111) is greater than the cutting depth of the inner side wall of the flame-stabilizing fire groove (113), so that the entrance diameter of the first channel (41) is greater than the entrance diameter of the flame-stabilizing channel (42).

5. The burner fire cover according to claim 2, characterized in that: The air outlets of the first fire hole (51) and the second fire hole (52) on the outside of the fire cover base (10) are located at the same height.

6. The burner cap according to claim 1, characterized in that: An annular boss (114) is provided at the upper end of the fire cover base (10); the partition plate (20) is covered on the annular boss (114) of the fire cover base (10); the upper end surface of the partition plate (20) is flush with the upper end surface of the fire cover base (10); and the cover plate (30) and the first fire groove (111) are enclosed to form the first fire hole (51).

7. The burner cap according to claim 1, characterized in that: The cover plate (30) is ring-shaped.

8. The burner cap according to claim 1, characterized in that: A positioning structure is provided between the fire cover base (10) and the partition plate (20).

9. The burner cap according to claim 8, characterized in that: The positioning structure is a positioning groove (23) and a positioning strip (13) that cooperate with each other.

10. A stove burner, characterized in that: include: The burner fire cover (100) according to any one of claims 1 to 9; as well as A furnace head (200), wherein the furnace head (200) is provided with a first lower mixing chamber (202) and a second lower mixing chamber (203) which are independent of each other and have upper openings; Wherein, the burner fire cover (100) is covered on the furnace head (200), the first mixing chamber (43) is connected to the first lower mixing chamber (202), and the second mixing chamber (44) is connected to the second lower mixing chamber (203).

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