Fire cover, combustor, gas stove and integrated electric appliance

Abstract

The utility model discloses a burner cap, a burner, a gas stove and an integrated electric appliance. The fire covers comprise the first fire cover, the second fire cover and the third fire cover, the first fire cover surrounds the second fire cover, a first fire opening is formed between the first fire cover and the second fire cover, the second fire cover surrounds the third fire cover, a third fire opening is formed between the second fire cover and the third fire cover, and the first fire cover, the second fire cover and the third fire cover are arranged in a split mode. According to the technical scheme, the first fire cover, the second fire cover and the third fire cover are arranged in a split mode, so that the first fire cover, the second fire cover and the third fire cover are manufactured separately and then can be assembled together, through the scheme, the machining difficulty of a single structural part is effectively reduced, and disassembly, assembly and cleaning are easy.

Description

Technical Field

[0001] This application relates to the technical field of gas stoves, and particularly relates to a burner cap, a burner, a gas stove, and an integrated electrical appliance. Background Art

[0002] The burner has a burner cap, and gas and air are ejected from the burner cap from the inside of the burner, and thus are ignited to form a flame. At present, some burner caps drill multiple rings of flame holes on a single structural member, which has a relatively high processing difficulty, the processing efficiency needs to be improved, and it is not easy to clean. Utility Model Content

[0003] This application aims to solve at least one of the technical problems in the related art to some extent. For this purpose, this application provides a burner cap.

[0004] To achieve the above object, this application discloses a burner cap, which includes:

[0005] A first burner cap;

[0006] A second burner cap, surrounded by the first burner cap, and having a first flame port provided therebetween and the first burner cap; and

[0007] A third burner cap, surrounded by the second burner cap, and having a third flame port provided therebetween and the second burner cap, wherein the first burner cap, the second burner cap, and the third burner cap are separately provided.

[0008] In some embodiments of this application, the first burner cap overlaps the second burner cap and is adapted to be radially sealed with the burner head;

[0009] And / or, the third burner cap overlaps the second burner cap and is adapted to be radially sealed with the burner head.

[0010] In some embodiments of this application, the second burner cap includes a main body portion and an outer support platform provided on the outer side of the main body portion. The first burner cap overlaps the outer support platform. A first upstream flow section is provided between the first burner cap and the outer support platform. A first downstream flow section is provided between the first burner cap and the main body portion. The first upstream flow section and the first downstream flow section intersect to form a first corner, and the end of the first downstream flow section constitutes the first flame port.

[0011] In some embodiments of this application, the outer support platform includes an outer ring portion and outer convex portions provided on the outer ring portion and protruding upward. The outer ring portion extends along the circumferential direction of the second burner cap, and a plurality of the outer convex portions are arranged at intervals along the circumferential direction of the second burner cap, and the first burner cap overlaps the outer convex portions.

[0012] In some embodiments of the present application, the first burner cap includes a first bottom ring, a first middle ring, and a first top ring. The first bottom ring is adapted to be radially sealed with the burner head. The first middle ring overlaps the outer support platform, and a first upstream flow section is provided between the first middle ring and the outer support platform. A first downstream flow section is provided between the first top ring and the main body portion.

[0013] In some embodiments of the present application, the second burner cap includes a main body portion and an inner support platform provided on the inner side of the main body portion. The third burner cap overlaps the inner support platform. A third upstream flow section is provided between the third burner cap and the inner support platform. A third downstream flow section is provided between the third burner cap and the main body portion. The third upstream flow section and the third downstream flow section intersect to form a third corner. The end of the third downstream flow section constitutes the third burner port.

[0014] In some embodiments of the present application, the inner support platform includes an inner ring portion and inner convex portions provided on the inner ring portion and protruding upward. The inner ring portion extends along the circumferential direction of the second burner cap, and a plurality of the inner convex portions are arranged at intervals along the circumferential direction of the second burner cap. The third burner cap overlaps the inner convex portions.

[0015] In some embodiments of the present application, the third burner cap includes a third bottom ring, a third middle ring, and a third top ring. The third bottom ring is adapted to be radially sealed with the burner head. The third middle ring overlaps the inner support platform, and a third upstream flow section is provided between the third middle ring and the inner support platform. A third downstream flow section is provided between the third top ring and the main body portion.

[0016] In some embodiments of the present application, the second burner cap is provided with a second burner port.

[0017] In some embodiments of the present application, the first burner cap and the third burner cap are made of stainless steel, and the second burner cap is made of copper.

[0018] In some embodiments of the present application, the number of the first burner ports is multiple, and the multiple first burner ports are arranged at intervals in a ring shape and surround the second burner port;

[0019] and / or, the number of the second burner ports is multiple, and the multiple second burner ports are arranged at intervals in a ring shape and surround the third burner port;

[0020] and / or, the number of the third burner ports is multiple.

[0021] In some embodiments of the present application, the first burner port is in the shape of an annular slit and surrounds the second burner port;

[0022] and / or, the second burner port is in the shape of an annular slit and surrounds the third burner port;

[0023] And / or, the third burner orifice is in the shape of an annular slit.

[0024] A second aspect of the present application discloses a burner, which includes a burner head and the above-mentioned burner cap provided on the burner head.

[0025] In some embodiments of the present application, the first burner orifice is adapted to eject gas and blast air, the second burner orifice of the second burner cap is adapted to eject gas and entrained air, and the third burner orifice is adapted to eject gas and blast air.

[0026] In some embodiments of the present application, the flame formed by the second burner orifice is adapted to stabilize the flame of the first burner orifice and / or the third burner orifice.

[0027] In some embodiments of the present application, the burner head is provided with a first cavity, a second cavity and a third cavity. The first burner orifice communicates with the first cavity, the second burner orifice communicates with the second cavity, and the third burner orifice communicates with the third cavity. The first cavity surrounds the second cavity and is provided with a common wall, and the second cavity surrounds the third cavity and is provided with a common wall.

[0028] In some embodiments of the present application, the first cavity communicates with the third cavity. The burner includes a first ejector tube and a second ejector tube. The first ejector tube is connected to the burner head and communicates with the first cavity or the third cavity, and the second ejector tube is connected to the burner head and communicates with the second cavity. The intake end of the first ejector tube is adapted to receive gas and blast air, and the intake end of the second ejector tube is adapted to receive gas and entrained air.

[0029] A third aspect of the present application discloses a gas stove, which includes the above-mentioned burner.

[0030] In some embodiments of the present application, the gas stove includes a valve body, and the valve body is adapted to adjust the gas volume. When the gas supply to the first burner orifice and the third burner orifice is interrupted in the valve body, the valve body is adapted to maintain the gas supply to the second burner orifice of the second burner cap, and the blower of the gas stove is in a working state to provide blast air.

[0031] A fourth aspect of the present application discloses an integrated appliance, which includes the above-mentioned gas stove.

[0032] Other advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present application. Description of the Drawings

[0033] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other designs can also be obtained based on the structures shown in these drawings.

[0034] Figure 1 Schematic diagram of a burner in some embodiments;

[0035] Figure 2 For Figure 1 Enlarged view of the part marked A in

[0036] Figure 3 Cross-sectional view of a burner in some embodiments;

[0037] Figure 4 Cross-sectional view of a burner in some embodiments (the cross-section is different from Figure 3 )

[0038] Figure 5 For Figure 4 Enlarged view of the part marked B in

[0039] Figure 6 Cross-sectional view of a burner cap in some embodiments;

[0040] Figure 7 For Figure 6 Enlarged view of the part marked C in

[0041] Figure 8 Cross-sectional view of a first burner cap in some embodiments;

[0042] Figure 9 Cross-sectional view of a second burner cap in some embodiments;

[0043] Figure 10 For Figure 9 Enlarged view of the part marked D in

[0044] Figure 11 Cross-sectional view of a third burner cap in some embodiments;

[0045] Figure 12 Schematic diagram of a burner head in some embodiments.

[0046] Explanation of the reference numerals in the drawings:

[0047] Burner 100, burner cap 1000, first burner cap 1110, first bottom ring 1111, first middle ring 1112, first top ring 1113, second burner cap 1120, main body part 1121, outer support platform 1122, outer ring part 11221, outer convex part 11222, inner support platform 1123, inner ring part 11231, inner convex part 11232, third burner cap 1130, third bottom ring 1131, third middle ring 1132, third top ring 1133, first burner port 1210, second burner port 1220, third burner port 1230, first upstream flow section 1310, first downstream flow section 1320, first corner 1330, third upstream flow section 1410, third downstream flow section 1420, third corner 1430, burner head 2000, first cavity 2110, second cavity 2120, third cavity 2130, first ring wall 2210, second ring wall 2220, third ring wall 2230, fourth ring wall 2240, first ejector pipe 3100, intake end of the first ejector pipe 3110, second ejector pipe 3200, intake end of the second ejector pipe 3210, fan 4000.

[0048] The realization of the purpose of this application, functional features and advantages will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0049] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0050] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of this application are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0051] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0052] In addition, in this application, descriptions such as "first" and "second" are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0053] The first aspect of this application discloses a burner cap 1000, as shown in combination with Figure 1 、 Figure 2 、 Figure 4 and Figure 5 In some embodiments, the burner cap 1000 includes a first burner cap 1110, a second burner cap 1120, and a third burner cap 1130. The second burner cap 1120 is surrounded by the first burner cap 1110, and a first fire port 1210 is provided between the second burner cap 1120 and the first burner cap 1110. The third burner cap 1130 is surrounded by the second burner cap 1120, and a third fire port 1230 is provided between the third burner cap 1130 and the second burner cap 1120. The first burner cap 1110, the second burner cap 1120, and the third burner cap 1130 are separately provided.

[0054] The burner cap 1000 will be described below in combination with the burner 100, and the burner 100 is applied to a gas stove. The first burner cap 1110, the second burner cap 1120, and the third burner cap 1130 cooperate with each other. The first burner cap 1110 surrounds the second burner cap 1120, and the second burner cap 1120 surrounds the third burner cap 1130, such that the first burner cap 1110 is farther from the center of the burner 100 relative to the second burner cap 1120 and the third burner cap 1130, and the third burner cap 1130 is closer to the center of the burner 100 relative to the first burner cap 1110 and the second burner cap 1120. The center of the burner 100 refers to the center of the fire outlet range of the burner 100, that is, when observing the burner 100 from top to bottom, the first burner cap 1110 is more outward, the third burner cap 1130 is more inward, and the second burner cap 1120 is located between the first burner cap 1110 and the third burner cap 1130.

[0055] The first burner cap 1110 surrounds the second burner cap 1120, so that a first combustion port 1210 is provided between the first burner cap 1110 and the second burner cap 1120 (that is, the first burner cap 1110 and the second burner cap 1120 cooperate to enclose the first combustion port 1210). Gas and air enter the interior of the burner 100, then are ejected from the first combustion port 1210, and are then ignited to form a flame. The second burner cap 1120 surrounds the third burner cap 1130, so that a third combustion port 1230 is provided between the second burner cap 1120 and the third burner cap 1130 (that is, the second burner cap 1120 and the third burner cap 1130 cooperate to enclose the third combustion port 123). Gas and air enter the interior of the burner 100, then are ejected from the third combustion port 1230, and are then ignited to form a flame. The first burner cap 1110, the second burner cap 1120, and the third burner cap 1130 are separately provided. The so-called separate setting means that the first burner cap 1110, the second burner cap 1120, and the third burner cap 1130 are respectively manufactured and then can be assembled together. Through such a solution, the processing difficulty of a single structural member is effectively reduced, and it is easy to disassemble, assemble, and clean.

[0056] Further, in some embodiments, the first burner cap 1110 and the third burner cap 1130 are made of stainless steel. The so-called stainless steel parts mean that the first burner cap 1110 and the third burner cap 1130 are mainly prepared from stainless steel materials, while the second burner cap 1120 is made of copper. The so-called copper parts mean that the second burner cap 1120 is mainly prepared from copper materials. By designing the first burner cap 1110 and the third burner cap 1130 as stainless steel parts, part of the copper material is replaced, which is beneficial to reducing costs compared with all-copper burner caps.

[0057] Since the first burner cap 1110 and the third burner cap 1130 are made of stainless steel, while the second burner cap 1120 is made of copper, therefore, compared with the first burner cap 1110 and the third burner cap 1130, the second burner cap 1120 is easier to process, so that relatively complex structures can be processed on the second burner cap 1120 to ensure that the burner cap 1000 has a certain thickness (in the up-down direction facing the Figure 4 indicated orientation, that is, the up-down direction of the gas stove in the installation environment). However, due to the relatively high hardness of stainless steel materials, limited by the processing technology and production cost, the first burner cap 1110 and the third burner cap 1130 can be designed to be relatively thin. The relatively thin first burner cap 1110 and third burner cap 1130 enclose the corresponding parts of the second burner cap 1120, thus forming the first combustion port 1210 and the third combustion port 1230. Even without processing holes, slots and other structures on the first burner cap 1110 and the third burner cap 1130, they can cooperate with the second burner cap 1120 to enclose the corresponding first combustion port 1210 and third combustion port 1230. Through such a setting, both the cost of the burner cap 1000 can be reduced, and a substantial increase in the manufacturing difficulty of the burner cap 1000 can be avoided.

[0058] Combined with Figure 4 and Figure 5 As shown, in some embodiments, the first burner cap 1110 overlaps the second burner cap 1120, and the first burner cap 1110 is used for radial sealing with the burner head 2000.

[0059] Specifically, the burner 100 includes a burner head 2000, and the burner cap 1000 is installed on the burner head 2000. It can be understood that when gas and air enter the interior of the burner 100, they ultimately need to be ejected from the burner cap 1000. Therefore, a good seal needs to be formed between the burner cap 1000 and the burner head 2000. In this embodiment, the first burner cap 1110 is designed to overlap the second burner cap 1120, that is, the first burner cap 1110 is supported on the second burner cap 1120 under the action of gravity, and the first burner cap 1110 achieves radial sealing with the burner head 2000. The acting force generated by the radial sealing between the first burner cap 1110 and the burner head 2000 is substantially perpendicular to the gravity, and the two do not interfere with each other, which is more conducive to the seal between the first burner cap 1110 and the burner head 2000. In particular, since the first burner cap 1110 is made of stainless steel, when the thickness of the first burner cap 1110 is relatively thin, a better sealing effect can be achieved through radial sealing between the relatively thin first burner cap 1110 and the burner head 2000.

[0060] Similarly, combined with Figure 4 and Figure 5 As shown, in some embodiments, the third burner cap 1130 overlaps the second burner cap 1120, and the third burner cap 1130 is used for radial sealing with the burner head 2000.

[0061] Specifically, the third burner cap 1130 is designed to overlap the second burner cap 1120, that is, the third burner cap 1130 is supported on the second burner cap 1120 under the action of gravity, and the third burner cap 1130 achieves radial sealing with the burner head 2000. The acting force generated by the radial sealing between the third burner cap 1130 and the burner head 2000 is substantially perpendicular to the gravity, and the two do not interfere with each other, which is more conducive to the seal between the third burner cap 1130 and the burner head 2000. In particular, since the third burner cap 1130 is made of stainless steel, when the thickness of the third burner cap 1130 is relatively thin, a better sealing effect can be achieved through radial sealing between the relatively thin third burner cap 1130 and the burner head 2000.

[0062] For example, combined with Figures 1 to 5As shown, the burner head 2000 includes a first annular wall 2210, a second annular wall 2220, a third annular wall 2230, and a fourth annular wall 2240. The first annular wall 2210 surrounds the second annular wall 2220, the second annular wall 2220 surrounds the third annular wall 2230, and the third annular wall 2230 surrounds the fourth annular wall 2240. A first cavity 2110 is provided between the first annular wall 2210 and the second annular wall 2220, a second cavity 2120 is provided between the second annular wall 2220 and the third annular wall 2230, and a third cavity 2130 is provided between the third annular wall 2230 and the fourth annular wall 2240. The second burner cap 1120 is placed on the second annular wall 2220 and the third annular wall 2230, and realizes radial and axial sealing with the second annular wall 2220 and the third annular wall 2230 (since the second burner cap 1120 is made of copper, it is easy to machine a structure for realizing radial and axial sealing, which can be referred to in the related art). The first burner cap 1110 is lapped on the second burner cap 1120 and thus supported on the second burner cap 1120, and the first burner cap 1110 realizes radial sealing with the first annular wall 2210. The third burner cap 1130 is lapped on the second burner cap 1120 and thus supported on the second burner cap 1120, and the third burner cap 1130 realizes radial sealing with the fourth annular wall 2240. In this way, the burner cap 1000 covers the burner head 2000. It can be understood that the orientation in this article is referenced with the gas stove installed in the use environment. The axial direction is the up and down direction, and the radial direction is the direction passing through the center of the burner 100 and perpendicular to the axial direction.

[0063] Combined Figures 6 to 9 As shown, in some embodiments, the second burner cap 1120 includes a main body portion 1121 and an outer support platform 1122. The outer support platform 1122 is provided on the outside of the main body portion 1121. It can be understood that the side of the main body portion 1121 facing the first burner cap 1110 is the outside, and the side facing the third burner cap 1130 is the inside. In this embodiment, the outer support platform 1122 and the main body portion 1121 are integrally formed to enhance the structural strength. The first burner cap 1110 surrounds the second burner cap 1120, and the first burner cap 1110 is lapped on the second burner cap 1120 by lapping on the outer support platform 1122. A first upstream flow section 1310 is provided between the first burner cap 1110 and the outer support platform 1122. When the first burner cap 1110 is lapped on the outer support platform 1122, the first burner cap 1110 surrounds the main body portion 1121, so that a first downstream flow section 1320 is provided between the first burner cap 1110 and the main body portion 1121. The first upstream flow section 1310 is communicated with the first downstream flow section 1320, and they intersect to form a first corner 1330. The end of the first downstream flow section 1320 constitutes a first fire port 1210.

[0064] Specifically, the first upstream flow section 1310 is arranged upstream of the first downstream flow section 1320. The corresponding gas entering the interior of the burner 100 flows through the first upstream flow section 1310 and the first downstream flow section 1320 in sequence, and finally is ejected from the first nozzle 1210. By arranging the first corner 1330 between the first upstream flow section 1310 and the first downstream flow section 1320, when the gas flows from the first upstream flow section 1310 to the first downstream flow section 1320, it needs to flow through the first corner 1330, that is, the gas needs to turn, so as to buffer the flow of the air flow, and is conducive to further uniform mixing of the fuel gas and air in the gas, improving the uniformity and stability of the gas ejected from the first nozzle 1210.

[0065] Combined with Figure 10 As shown, the outer support platform 1122 includes an outer ring portion 11221 and an outer convex portion 11222. The outer ring portion 11221 extends along the circumferential direction of the second burner cap 1120. The outer convex portion 11222 is arranged on the outer ring portion 11221, and the outer convex portion 11222 protrudes upward. The outer support platform 1122 includes a plurality of outer convex portions 11222, and the plurality of outer convex portions 11222 are arranged at intervals along the circumferential direction of the second burner cap 1120. The first burner cap 1110 is lapped on the outer convex portion 11222 and thus lapped on the outer support platform 1122.

[0066] Specifically, the outer ring portion 11221 and the outer convex portion 11222 form an integrally formed structure. The outer ring portion 11221 extends along the circumferential direction of the second burner cap 1120. In this way, the outer ring portion 11221 surrounds the main body portion 1121. A plurality of outer convex portions 11222 are arranged on the outer ring portion 11221, and the plurality of outer convex portions 11222 are also arranged along the circumferential direction of the second burner cap 1120. Since the first burner cap 1110 surrounds the second burner cap 1120, through such an arrangement, in the direction of surrounding the second burner cap 1120 (circumferentially of the second burner cap 1120), stable support for the first burner cap 1110 can be achieved. At the same time, the adjacent outer convex portions 11222 are arranged at intervals. When the first burner cap 1110 is lapped on the outer convex portion 11222, a first upstream flow section 1310 is provided between the adjacent outer convex portions 11222, the first burner cap 1110, and the outer ring portion 11221.

[0067] Combined with Figures 5 to 8 As shown, in some embodiments, the first burner cap 1110 includes a first bottom ring 1111, a first middle ring 1112, and a first top ring 1113. The first bottom ring 1111 is used for radial sealing with the burner head 2000. The first middle ring 1112 is lapped on the outer support platform 1122, and thus a first upstream flow section 1310 is provided between the first middle ring 1112 and the outer support platform 1122. A first downstream flow section 1320 is provided between the first top ring 1113 and the main body portion 1121.

[0068] Specifically, since the first burner cap 1110 is made of stainless steel, the first burner cap 1110 can be prepared by stamping. That is, the first burner cap 1110 is stamped to form a first bottom ring 1111, a first middle ring 1112, and a first top ring 1113, reducing the manufacturing difficulty of the first burner cap 1110. For example, the first bottom ring 1111 extends in the up and down direction, the first middle ring 1112 extends transversely (towards the center of the burner 100) from the first bottom ring 1111, and the first top ring 1113 extends in the up and down direction from the first middle ring 1112. When assembling the burner 100, the second burner cap 1120 can be first placed on the burner head 2000 (the second annular wall 2220 and the third annular wall 2230), and then the first burner cap 1110 is placed on the burner head 2000. At this time, the first bottom ring 1111 cooperates with the first annular wall 2210 to achieve radial sealing, and the first middle ring 1112 overlaps on the convex portion 11222, thereby forming a first upstream flow section 1310. The first top ring 1113 surrounds the main body portion 1121, thereby forming a first downstream flow section 1320.

[0069] Combined Figure 6 、 Figure 7 、 Figure 9 and Figure 11 As shown, in some embodiments, the second burner cap 1120 includes a main body portion 1121 and an inner support platform 1123. The inner support platform 1123 is disposed inside the main body portion 1121, and the inner support platform 1123 is integrally formed with the main body portion 1121 to enhance the structural strength. The second burner cap 1120 surrounds the third burner cap 1130, and the third burner cap 1130 overlaps on the second burner cap 1120 by overlapping on the inner support platform 1123. A third upstream flow section 1410 is provided between the third burner cap 1130 and the inner support platform 1123. When the third burner cap 1130 overlaps on the inner support platform 1123, the main body portion 1121 surrounds the third burner cap 1130, such that a third downstream flow section 1420 is provided between the third burner cap 1130 and the main body portion 1121. The third upstream flow section 1410 communicates with the third downstream flow section 1420 and intersects to form a third corner 1430, and the end of the third downstream flow section 1420 constitutes a third flame port 1230.

[0070] Specifically, the third upstream flow section 1410 is disposed upstream of the third downstream flow section 1420. The corresponding gas entering the interior of the burner 100 flows through the third upstream flow section 1410 and the third downstream flow section 1420 in sequence, and finally is ejected from the third nozzle 1230. By providing a third corner 1430 between the third upstream flow section 1410 and the third downstream flow section 1420, the gas needs to flow through the third corner 1430 when flowing from the third upstream flow section 1410 to the third downstream flow section 1420, that is, the gas needs to turn, so as to buffer the flow of the gas flow, and is conducive to further uniform mixing of the fuel gas and air in the gas, improving the uniformity and stability of the gas ejected from the third nozzle 1230.

[0071] Combined with Figure 10 As shown, the inner support platform 1123 includes an inner ring portion 11231 and an inner convex portion 11232. The inner ring portion 11231 extends along the circumferential direction of the second burner cap 1120. The inner convex portion 11232 is disposed on the inner ring portion 11231 and protrudes upward. The inner support platform 1123 includes a plurality of inner convex portions 11232, and the plurality of inner convex portions 11232 are arranged at intervals along the circumferential direction of the second burner cap 1120. The third burner cap 1130 is overlapped on the inner convex portion 11232 and thus overlapped on the inner support platform 1123.

[0072] Specifically, the inner ring portion 11231 and the inner convex portion 11232 form an integrally formed structure. The inner ring portion 11231 extends along the circumferential direction of the second burner cap 1120. In this way, the main body portion 1121 surrounds the inner ring portion 11231. A plurality of inner convex portions 11232 are disposed on the inner ring portion 11231, and the plurality of inner convex portions 11232 are also arranged along the circumferential direction of the second burner cap 1120. Since the second burner cap 1120 surrounds the third burner cap 1130, through such an arrangement, stable support for the third burner cap 1130 can be achieved in the circumferential direction of the second burner cap 1120. At the same time, the adjacent inner convex portions 11232 are arranged at intervals. When the third burner cap 1130 is overlapped on the inner convex portion 11232, a third upstream flow section 1410 is provided between the adjacent inner convex portions 11232, the third burner cap 1130 and the inner ring portion 11231.

[0073] Combined with Figures 5 to 7 and Figure 11 As shown, in some embodiments, the third burner cap 1130 includes a third bottom ring 1131, a third middle ring 1132 and a third top ring 1133. The third bottom ring 1131 is used for radial sealing with the burner head 2000. The third middle ring 1132 is overlapped on the inner support platform 1123 and thus a third upstream flow section 1410 is provided between the third middle ring 1132 and the inner support platform 1123. A third downstream flow section 1420 is provided between the third top ring 1133 and the main body portion 1121.

[0074] Specifically, since the third burner cap 1130 is made of stainless steel, the third burner cap 1130 can be prepared by stamping, that is, the third bottom ring 1131, the third middle ring 1132 and the third top ring 1133 are formed by stamping the third burner cap 1130, reducing the manufacturing difficulty of the third burner cap 1130. For example, the third bottom ring 1131 extends in the up and down direction, the third middle ring 1132 extends laterally from the third bottom ring 1131 (away from the center of the burner 100), and the third top ring 1133 extends in the up and down direction from the third middle ring 1132. When assembling the burner 100, the second burner cap 1120 can be first placed on the burner head 2000 (the second ring wall 2220 and the third ring wall 2230), and then the third burner cap 1130 is placed on the burner head 2000. At this time, the third bottom ring 1131 cooperates with the fourth ring wall 2240 to achieve radial sealing, and the third middle ring 1132 overlaps on the inner convex portion 11232, thereby forming a third upstream flow section 1410, and the main body portion 1121 surrounds the third top ring 1133 to form a third downstream flow section 1420.

[0075] Combined with Figure 1 and Figure 2 As shown, in some embodiments, the second burner cap 1120 is provided with a second burner port 1220 for discharging gas and air. By providing the second burner port 1220, the formation of the flame is increased, and the heating effect on the cookware is improved. Since the second burner cap 1120 is made of copper, it is relatively easy to machine the second burner port 1220 on the second burner cap 1120.

[0076] The second aspect of the present application discloses a burner 100. Combined with Figures 1 to 11 As shown, the burner 100 includes a burner head 2000 and the burner cap 1000 of the above embodiment. The burner cap 1000 includes a first burner cap 1110, a second burner cap 1120 and a third burner cap 1130. The second burner cap 1120 is surrounded by the first burner cap 1110, and a first burner port 1210 is provided between the second burner cap 1120 and the first burner cap 1110. The third burner cap 1130 is surrounded by the second burner cap 1120, and a third burner port 1230 is provided between the third burner cap 1130 and the second burner cap 1120. Among them, the first burner cap 1110, the second burner cap 1120 and the third burner cap 1130 are separately provided.

[0077] In some embodiments, the first burner port 1210 is used for discharging blast air and gas, the second burner port 1220 is used for discharging induced air and gas, and the third burner port 1230 is used for discharging blast air and gas.

[0078] The entrained air and gas enter the interior of the burner 100, and then are ejected from the interior of the burner 100 through the second burner orifice 1220 and are ignited to form a flame. The gas supply can come from bottled liquefied gas or pipeline natural gas. The gas stove includes a valve body. After the valve body is opened, the gas is transmitted along the gas pipeline. The gas flows through the valve body and is ejected through the nozzle. The gas ejected from the nozzle is sprayed into the interior of the burner 100. During the process of the gas being sprayed into the interior of the burner 100, the entrainment of air is synchronously achieved, so that the entrained air follows the gas into the interior of the burner 100 (the air that enters the interior of the burner 100 through the entrainment effect is called entrained air, and the entrained air is primary air), and then the entrained air and the gas are ejected from the second burner orifice 1220.

[0079] The first burner orifice 1210 is used for the ejection of the blast air and gas, and the third burner orifice 1230 is also used for the ejection of the blast air and gas. The blast air and gas enter the interior of the burner 100, and then are ejected from the interior of the burner 100 through the first burner orifice 1210 and the third burner orifice 1230 and are ignited to form a flame. Similar to the description above, the gas supply can come from bottled liquefied gas or pipeline natural gas. The gas stove includes a valve body. After the valve body is opened, the gas is transmitted along the gas pipeline. The gas flows through the valve body and is ejected through the nozzle. The gas ejected from the nozzle is sprayed into the interior of the burner 100. During this process, blast air is provided. The blast air is generated by a fluid machine, such as the forced blast of a blower 4000 to provide the blast air. The blast air enters the interior of the burner 100 and mixes with the gas (the blast air is primary air), and then is ejected from the first burner orifice 1210 and the third burner orifice 1230 together with the gas. Compared with the entrained air, the blast air can provide more oxygen, so that the gas ejected from the first burner orifice 1210 and the third burner orifice 1230 is in a state of rich-oxygen combustion, thus enabling the full combustion of the gas ejected from the first burner orifice 1210 and the third burner orifice 1230 (the flames generated by the first burner orifice 1210 and the third burner orifice 1230 can still entrain the secondary air in the surrounding environment to participate in combustion).

[0080] The gas ejected from the second burner port 1220 is not sufficient to burn fully by only entraining air and drawing in the surrounding ambient air. Since the air ejected from the first burner port 1210 and the third burner port 1230 is forced air, the forced air ejected from the first burner port 1210 can provide enough oxygen. So, in addition to participating in the combustion of the gas ejected from the first burner port 1210, the excess oxygen in the forced air ejected from the first burner port 1210 can also be supplemented into the gas ejected from the second burner port 1220 to assist in the combustion of the gas ejected from the second burner port 1220. Similarly, the forced air ejected from the third burner port 1230 can also provide enough oxygen. So, in addition to participating in the combustion of the gas ejected from the third burner port 1230, the excess oxygen in the forced air ejected from the third burner port 1230 can also be supplemented into the gas ejected from the second burner port 1220 to assist in the combustion of the gas ejected from the second burner port 1220. Compared with supplementing secondary air from the surrounding environment by entrainment, the excess oxygen provided by the forced air ejected from the first burner port 1210 and the excess oxygen provided by the forced air ejected from the third burner port 1230 are more actively supplemented into the gas ejected from the second burner port 1220, enabling the gas ejected from the second burner port 1220 to burn fully (the flame generated by the second burner port 1220 can still draw in the secondary air from the surrounding environment to participate in combustion). Also, since the first burner cap 1110 surrounds the second burner cap 1120 and the second burner cap 1120 surrounds the third burner cap 1130, the second burner port 1220 is located between the first burner port 1210 and the third burner port 1230. The excess oxygen provided by the forced air ejected from the first burner port 1210 and the excess oxygen provided by the forced air ejected from the third burner port 1230 are supplemented into the gas ejected from the second burner port 1220 from the relative two sides of the second burner port 1220, and the oxygen supplementation efficiency is higher.

[0081] Through the above solution, the gas ejected from the first burner port 1210, the second burner port 1220, and the third burner port 1230 burns fully, with high combustion efficiency, which is beneficial to improving the thermal efficiency of the gas stove. It can be understood that the full combustion mentioned in this article is relative to the combustion state when only entraining air and drawing in the surrounding ambient air (that is, relatively more sufficient).

[0082] In some embodiments, the flame generated by the second burner orifice 1220 is suitable for stabilizing the flame of the first burner orifice 1210. Specifically, the first burner orifice 1210 ejects blast air and fuel gas. The inventors have found that although sufficient combustion of the fuel gas can be achieved through the blast air, due to the effect of the blast air, the gas flow rate ejected from the first burner orifice 1210 is relatively large, and the velocity of the fuel gas leaving the first burner orifice 1210 is greater than the combustion velocity of the fuel gas, which easily causes a flame lift phenomenon. Since the second burner orifice 1220 ejects entrained air and fuel gas, and the entrained air is naturally entrained by injecting the fuel gas through a nozzle without the need to be generated based on a fluid machine, the velocity of the fuel gas leaving the second burner orifice 1220 is not much different from the combustion velocity of the fuel gas, and stable combustion can be achieved, that is, the flame state formed by the second burner orifice 1220 is stable. Since the flame formed by the second burner orifice 1220 is more stable, the flame generated by the second burner orifice 1220 can be used to stabilize the flame of the first burner orifice 1210.

[0083] That is to say, in addition to heating the cooking utensil, the flame formed by the second burner orifice 1220 also functions as a flame stabilizing hole / flame stabilizing groove. Generally speaking, since the second burner orifice 1220 ejects entrained air and fuel gas, the fuel gas ejected from the second burner orifice 1220 has a more stable combustion state. By adjusting the position, angle, or distance between the second burner orifice 1220 and the first burner orifice 1210, the flame formed by the second burner orifice 1220 ignites the fuel gas ejected from the first burner orifice 1210 (for example, the flame formed by the second burner orifice 1220 heats the root of the fuel gas ejected from the first burner orifice 1210 to ignite the fuel gas ejected from the first burner orifice 1210). When the fuel gas quickly leaves the first burner orifice 1210, it is ignited by the flame formed by the second burner orifice 1220. In this way, the fuel gas that quickly leaves the first burner orifice 1210 burns at the first burner orifice 1210, thereby suppressing the occurrence of the flame lift phenomenon at the first burner orifice 1210 and playing a role in stabilizing the flame of the first burner orifice 1210, and further improving the combustion efficiency.

[0084] In some embodiments, the flame generated by the second burner opening 1220 is suitable for stabilizing the flame of the third burner opening 1230. Specifically, the third burner opening 1230 ejects blast air and fuel gas. Although sufficient combustion of the fuel gas can be achieved through the blast air, due to the effect of the blast air, the gas flow rate ejected from the third burner opening 1230 is relatively large, and the velocity of the fuel gas leaving the third burner opening 1230 is greater than the combustion velocity of the fuel gas, which easily causes the flame lift phenomenon. Since the second burner opening 1220 ejects entrained air and fuel gas, and the entrained air is naturally entrained by injecting the fuel gas through a nozzle without the need to be generated based on a fluid machine, the velocity of the fuel gas leaving the second burner opening 1220 is not much different from the combustion velocity of the fuel gas, enabling stable combustion, that is, the flame state formed by the second burner opening 1220 is stable. Since the flame formed by the second burner opening 1220 is more stable, the flame generated by the second burner opening 1220 can be used to stabilize the flame of the third burner opening 1230.

[0085] That is to say, in addition to being able to heat the cooking utensil, the flame formed by the second burner opening 1220 also functions as a flame stabilizing hole / flame stabilizing groove. Generally speaking, since the second burner opening 1220 ejects entrained air and fuel gas, the fuel gas ejected from the second burner opening 1220 has a more stable combustion state. By adjusting the position, angle, or distance between the second burner opening 1220 and the third burner opening 1230, the flame formed by the second burner opening 1220 ignites the fuel gas ejected from the third burner opening 1230 (the flame formed by the second burner opening 1220 heats the root of the fuel gas ejected from the third burner opening 1230 to ignite the fuel gas ejected from the third burner opening 1230). When the fuel gas quickly leaves the third burner opening 1230, it is ignited by the flame formed by the second burner opening 1220, so that the fuel gas quickly leaving the third burner opening 1230 burns at the third burner opening 1230, thereby suppressing the occurrence of the flame lift phenomenon at the third burner opening 1230 and playing a role in stabilizing the flame of the third burner opening 1230.

[0086] It can be understood that the flame generated by the second burner opening 1220 can simultaneously stabilize the flames of the first burner opening 1210 and the second burner opening 1220, that is, the flame formed by the second burner opening 1220 ignites the fuel gas ejected from the first burner opening 1210 and the fuel gas ejected from the third burner opening 1230.

[0087] In some embodiments, the number of the first burner openings 1210 is multiple, where multiple means two or more. The multiple first burner openings 1210 are arranged in an annular and alternating manner, enabling large-range heating of the cooking utensil. In addition to the above situation, it can also be Figure 1 and Figure 2As shown, in some embodiments, the first burner orifice 1210 is in the form of an annular slit. The annular-slit first burner orifice 1210 can also achieve large-range heating of the cooking utensil. When the first burner orifice 1210 is designed as an annular slit, the excess oxygen in the gas ejected from the first burner orifice 1210 can increase the contact with the gas ejected from the second burner orifice 1220, further improving the oxygen supplementation effect on the gas ejected from the second burner orifice 1220.

[0088] Combined with Figure 1 and Figure 2 As shown, in some embodiments, the number of the second burner orifices 1220 is multiple, and the multiple second burner orifices 1220 are arranged in an annular and alternating pattern. The multiple second burner orifices 1220 eject gas to generate flames, which can achieve large-range heating of the cooking utensil. In addition to the above situation, it can also be that, in some embodiments, the second burner orifice 1220 is in the form of an annular slit. The annular-slit second burner orifice 1220 can also achieve large-range heating of the cooking utensil.

[0089] In some embodiments, the number of the third burner orifices 1230 is multiple, and the multiple third burner orifices 1230 are arranged in an annular and alternating pattern or a dense pattern. In addition to the above situation, it can also be that, combined with Figure 1 and Figure 2 As shown, in some embodiments, the third burner orifice 1230 is in the form of an annular slit, so that the excess oxygen in the gas ejected from the third burner orifice 1230 can increase the contact with the gas ejected from the second burner orifice 1220, further improving the oxygen supplementation effect on the gas ejected from the second burner orifice 1220.

[0090] When there are multiple first burner orifices 1210 and they are arranged in an annular pattern, the multiple first burner orifices 1210 surround the second burner orifice 1220 (the second burner orifice 1220 can be multiple or in the form of an annular slit). When the first burner orifice 1210 is in the form of an annular slit, the annular-slit first burner orifice 1210 surrounds the second burner orifice 1220 (the second burner orifice 1220 can be multiple or in the form of an annular slit). When there are multiple second burner orifices 1220 and they are arranged in an annular pattern, the multiple second burner orifices 1220 surround the third burner orifice 1230 (the third burner orifice 1230 can be multiple or in the form of an annular slit). When the second burner orifice 1220 is in the form of an annular slit, the annular-slit second burner orifice 1220 surrounds the third burner orifice 1230 (the third burner orifice 1230 can be multiple or in the form of an annular slit).

[0091] Combined with Figure 4 、 Figure 5 and Figure 12As shown, in some embodiments, the burner head 2000 includes a first cavity 2110, a second cavity 2120, and a third cavity 2130. The first burner port 1210 is in communication with the first cavity 2110, the second burner port 1220 is in communication with the second cavity 2120, and the third burner port 1230 is in communication with the third cavity 2130. The blast air and the fuel gas enter the first cavity 2110 and then are ejected from the first burner port 1210 and ignited to form a flame. The induced air and the fuel gas enter the second cavity 2120 and then are ejected from the second burner port 1220 and ignited to form a flame. The blast air and the fuel gas enter the third cavity 2130 and then are ejected from the third burner port 1230 and ignited to form a flame. Optionally, the first cavity 2110 and the third cavity 2130 can be designed to be in communication, so that the blast air and the fuel gas can enter the third cavity 2130 after entering the first cavity 2110, or enter the first cavity 2110 after entering the third cavity 2130. Further, the first cavity 2110 surrounds the second cavity 2120, and the first cavity 2110 and the second cavity 2120 share a common wall. The second cavity 2120 surrounds the third cavity 2130, and the second cavity 2120 and the third cavity 2130 share a common wall, which is beneficial to reducing costs. For example, a first cavity 2110 is formed between the first annular wall 2210 and the second annular wall 2220, a second cavity 2120 is formed between the second annular wall 2220 and the third annular wall 2230, and a third cavity 2130 is formed between the third annular wall 2230 and the fourth annular wall 2240.

[0092] Combined with Figures 1 to 4 As shown, in some embodiments, the burner 100 includes a first ejector tube 3100 and a second ejector tube 3200. The first ejector tube 3100 is connected to the burner head 2000 so as to be in communication with the first cavity 2110 or the third cavity 2130, and the second ejector tube 3200 is connected to the burner head 2000 so as to be in communication with the second cavity 2120. The air inlet end 3110 of the first ejector tube 3100 cooperates with the nozzle and is used to receive the blast air, and the air inlet end 3210 of the second ejector tube 3200 cooperates with the nozzle.

[0093] Specifically, the first ejector tube 3100 has a Venturi structure. The air inlet end 3110 of the first ejector tube 3100 is matched with the nozzle, that is, the nozzle is aligned with the air inlet end 3110 of the first ejector tube 3100 to inject fuel gas. At the same time, the blast air enters through the air inlet end 3110 of the first ejector tube 3100, for example, realized by forced blast through the blower 4000. The blast air and the fuel gas are delivered to the first cavity 2110 and the third cavity 2130, and finally ejected from the first burner port 1210 and the third burner port 1230. It can be understood that the blower 4000 can be fixedly connected to the first ejector tube 3100, which is more convenient for the cooperation between the blower 4000 and the air inlet end 3110 of the first ejector tube 3100. The second ejector tube 3200 has a Venturi structure. The air inlet end 3210 of the second ejector tube 3200 is matched with the nozzle, that is, the nozzle is aligned with the air inlet end 3210 of the second ejector tube 3200 to inject fuel gas. At the same time, a negative pressure is formed on the surrounding environment to eject air. The ejected air and the fuel gas are delivered to the second cavity 2120 for mixing, and finally ejected from the second burner port 1220.

[0094] The third aspect of the present application discloses a gas stove, which is characterized in that the gas stove includes the above-mentioned burner 100. It can be understood that the burner 100 of the gas stove in this embodiment adopts the technical solution of the above-mentioned embodiment, and thus has at least the beneficial effects brought by the technical solution of the above-mentioned embodiment, which will not be repeated here.

[0095] In some embodiments, the gas stove includes a valve body (not shown in the figure). The valve body is used to adjust the fuel gas volume. When the fuel gas supply to the first burner port 1210 and the third burner port 1230 is interrupted in the valve body, the valve body can maintain the fuel gas supply to the second burner port 1220, and at this time, the blower 4000 is still in the working state.

[0096] Specifically, the valve body is a device for regulating the gas flow. The inlet of the valve body is connected to the gas pipeline, and the outlet of the valve body is connected to the nozzle. By adjusting the valve body, the gas volume finally leading to the first burner port 1210, the second burner port 1220, and the third burner port 1230 can be adjusted. For the specific structure of the valve body, reference can be made to the related technology, which will not be elaborated here in detail. When the valve body is adjusted until the gas supply to the first burner port 1210 and the third burner port 1230 is interrupted, the gas supply to the second burner port 1220 can still be maintained. And at this time, the blower 4000 is also in the working state. Thus, the air (blast air) forcibly conveyed by the blower 4000 is ejected through the first burner port 1210 and the third burner port 1230 and supplemented into the gas ejected from the second burner port 1220, ensuring that the gas ejected from the second burner port 1220 can also burn sufficiently when the gas is not ejected through the first burner port 1210 and the third burner port 1230. It can be understood that the blower 4000 can be started synchronously when the gas stove is ignited. No matter how the valve body is adjusted, the blower 4000 still remains in the running state until the gas stove is extinguished and then the blower 4000 is turned off. Of course, other control logics can also be adopted, which will not be elaborated one by one here.

[0097] The fourth aspect of the present application discloses an integrated appliance. The integrated appliance includes the gas stove of the above embodiment. The so-called integrated appliance is a device that integrates the functions of a gas stove and another traditional appliance. For example, at least one of a microwave oven, an oven, a steamer, and a range hood can be integrated with the gas stove to form an integrated appliance. Of course, the integrated appliance is not limited to the appliances listed above. As long as it can achieve more functions when integrated with the gas stove compared to a single gas stove, it can be regarded as an integrated appliance. It can be understood that the gas stove of the integrated appliance in this embodiment adopts the technical solution of the above embodiment. Therefore, it has at least the beneficial effects brought by the technical solution of the above embodiment, which will not be repeated here.

[0098] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. All equivalent structural transformations made under the concept of the present application by using the content of the specification and drawings of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A fire cover (1000), characterized in that: The fire cover (1000) comprises: a first fire cover (1110); a second fire cover (1120), surrounded by the first fire cover (1110), with a first fire port (1210) disposed between the second fire cover (1120) and the first fire cover (1110); and The third fire cover (1130) is surrounded by the second fire cover (1120), and a third fire port (1230) is provided between the third fire cover (1130) and the second fire cover (1120). The first fire cover (1110), the second fire cover (1120) and the third fire cover (1130) are separately arranged.

2. The fire cover (1000) according to claim 1, characterized in that: The first fire cover (1110) overlaps the second fire cover (1120) and is suitable for radial sealing with the furnace head (2000); And / or, the third fire cover (1130) overlaps the second fire cover (1120) and is suitable for radial sealing with the furnace head (2000).

3. The fire cover (1000) according to claim 1, characterized in that: The second fire cover (1120) comprises a main body (1121) and an outer support platform (1122) arranged on the outer side of the main body (1121); the first fire cover (1110) is overlapped on the outer support platform (1122); a first upstream flow section (1310) is arranged between the first fire cover (1110) and the outer support platform (1122); a first downstream flow section (1320) is arranged between the first fire cover (1110) and the main body (1121); the first upstream flow section (1310) and the first downstream flow section (1320) intersect to form a first corner (1330); and the end of the first downstream flow section (1320) constitutes the first fire port (1210).

4. The fire cover (1000) according to claim 3, characterized in that: The outer support platform (1122) includes an outer ring portion (11221) and an outer convex portion (11222) arranged on the outer ring portion (11221) and protruding upward, the outer ring portion (11221) extends along the circumference of the second fire cover (1120), and a plurality of the outer convex portions (11222) are alternately arranged along the circumference of the second fire cover (1120), and the first fire cover (1110) overlaps the outer convex portion (11222).

5. The fire cover (1000) according to claim 3, characterized in that: The first fire cover (1110) comprises a first bottom ring (1111), a first middle ring (1112) and a first top ring (1113); the first bottom ring (1111) is suitable for radial sealing with the furnace head (2000); the first middle ring (1112) is overlapped with the outer support platform (1122) and the first upstream flow section (1310) is arranged between the first middle ring (1112) and the outer support platform (1122); the first downstream flow section (1320) is arranged between the first top ring (1113) and the main body (1121).

6. The fire cover (1000) according to claim 1, characterized in that: The second fire cover (1120) includes a main body (1121) and an inner support platform (1123) arranged on the inner side of the main body (1121); the third fire cover (1130) is overlapped on the inner support platform (1123); a third upstream flow section (1410) is arranged between the third fire cover (1130) and the inner support platform (1123); a third downstream flow section (1420) is arranged between the third fire cover (1130) and the main body (1121); the third upstream flow section (1410) and the third downstream flow section (1420) intersect to form a third corner (1430); and the end of the third downstream flow section (1420) constitutes the third fire port (1230).

7. The fire cover (1000) according to claim 6, characterized in that: The inner support platform (1123) includes an inner ring portion (11231) and an inner convex portion (11232) which is arranged on the inner ring portion (11231) and convexly extends upward, the inner ring portion (11231) extends along the circumference of the second fire cover (1120), and a plurality of the inner convex portions (11232) are alternately arranged along the circumference of the second fire cover (1120), and the third fire cover (1130) overlaps the inner convex portion (11232).

8. The fire cover (1000) according to claim 6, characterized in that: The third fire cover (1130) includes a third bottom ring (1131), a third middle ring (1132) and a third top ring (1133); the third bottom ring (1131) is suitable for radial sealing with the furnace head (2000); the third middle ring (1132) is overlapped with the inner support platform (1123) and the third upstream flow section (1410) is arranged between the third middle ring (1132) and the inner support platform (1123); the third downstream flow section (1420) is arranged between the third top ring (1133) and the main body (1121).

9. The fire cover (1000) according to claim 1, characterized in that: The first fire cover (1110) and the third fire cover (1130) are made of stainless steel, and the second fire cover (1120) is made of copper.

10. The fire cover (1000) according to claim 1, characterized in that: The second fire cover (1120) is provided with a second fire port (1220).

11. The fire cover (1000) according to claim 10, characterized in that: The number of the first burners (1210) is multiple, and the multiple first burners (1210) are arranged alternately in a ring shape and surround the second burner (1220); And / or, the number of the second burners (1220) is multiple, and the multiple second burners (1220) are arranged alternately in a ring shape and surround the third burner (1230); And / or, the number of the third flame ports (1230) is multiple.

12. The fire cover (1000) according to claim 10, characterized in that: The first burner (1210) is in the shape of an annular seam and surrounds the second burner (1220); and / or, the second burner (1220) is in the shape of an annular seam and surrounds the third burner (1230); And / or, the third burner (1230) is in the shape of an annular seam.

13. A burner (100), characterized in that: It comprises a burner head (2000) and a fire cover (1000) according to any one of claims 1 to 12 and arranged on the burner head (2000).

14. The burner (100) according to claim 13, characterized in that The first burner (1210) is suitable for supplying fuel gas and blast air to be ejected, the second burner (1220) of the second fire cover (1120) is suitable for supplying fuel gas and induced air to be ejected, and the third burner (1230) is suitable for supplying fuel gas and blast air to be ejected.

15. The burner (100) according to claim 14, characterized in that The flame formed by the second burner (1220) is suitable for stabilizing the flame of the first burner (1210) and / or the third burner (1230).

16. The burner (100) according to claim 14, characterized in that The furnace head (2000) is provided with a first cavity (2110), a second cavity (2120) and a third cavity (2130); the first burner (1210) is connected to the first cavity (2110); the second burner (1220) is connected to the second cavity (2120); the third burner (1230) is connected to the third cavity (2130); the first cavity (2110) surrounds the second cavity (2120) and is arranged with a common wall; the second cavity (2120) surrounds the third cavity (2130) and is arranged with a common wall.

17. The burner (100) according to claim 16, characterized in that The first cavity (2110) is communicated with the third cavity (2130), and the burner (100) comprises a first ejector tube (3100) and a second ejector tube (3200), the first ejector tube (3100) is connected to the burner head (2000) and is communicated with the first cavity (2110) or the third cavity (2130), the second ejector tube (3200) is connected to the burner head (2000) and is communicated with the second cavity (2120), an air inlet end (3110) of the first ejector tube (3100) is suitable for receiving fuel gas and blast air, and an air inlet end (3210) of the second ejector tube (3200) is suitable for receiving fuel gas and ejection air.

18. A gas stove, characterized in that: The gas stove comprises the burner (100) according to any one of claims 13 to 17.

19. The gas stove according to claim 18, characterized in that: The gas stove comprises a valve body, which is suitable for adjusting the amount of gas. When the valve body interrupts the gas supply to the first burner (1210) and the third burner (1230), the valve body is suitable for maintaining the gas supply to the second burner (1220) of the second fire cover (1120), and the fan (4000) of the gas stove is in working state to provide blowing air.

20. An integrated electrical appliance, characterized in that: The integrated electrical appliance comprises the gas stove according to claim 18 or 19.

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