Combustor and gas stove

Abstract

The utility model relates to the technical field of combustors, in particular to a combustor and a gas stove, the combustor comprises a furnace end assembly, a first fire cover and a second fire cover, the furnace end assembly defines a first annular channel and a second annular channel which are arranged in a sleeved mode, and the first annular channel and the second annular channel are respectively provided with a top opening; the first fire cover comprises an infrared radiant panel, and the infrared radiant panel is suitable for being installed in the first annular channel from the top opening of the first annular channel; the second fire cover is arranged at the top opening of the second annular channel, the upper end of the second fire cover is provided with a first limiting flange, and the first limiting flange is stopped at the position, close to the second fire cover, of the top of the infrared radiant panel. According to the combustor provided by the embodiment of the utility model, the first limiting flange, the supporting structure capable of covering the infrared radiant panel and the gap between the first fire cover and the second fire cover are arranged on the second fire cover, so that dirt is prevented from entering the space between the first fire cover and the second fire cover, the cleaning difficulty of the combustor is reduced, and the structure of the combustor is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a burner and a gas stove. Background Art

[0002] The gas stove is provided with an inner ring fire cover and an outer ring fire cover, and gas is released by arranging fire holes on the fire cover. In the related art, the inner ring fire cover and the outer ring fire cover are usually independent structures, and their respective fire holes are formed independently, resulting in a gap between the inner ring fire cover and the outer ring fire cover, and the support of the outer ring fire cover is exposed. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one purpose of the utility model is to provide a burner.

[0004] Another object of the present invention is to provide a gas stove comprising the aforementioned burner.

[0005] The burner according to the embodiment of the utility model includes a burner head assembly, a first fire cover and a second fire cover, the burner head assembly defines a first annular channel and a second annular channel, the first annular channel and the second annular channel both have a top opening; the first fire cover includes an infrared radiation plate, the infrared radiation plate is suitable for being installed in the first annular channel from the top opening of the first annular channel; the second fire cover is arranged at the top opening of the second annular channel and the upper end of the second fire cover has a first limiting flange, the first limiting flange stops at the top of the infrared radiation plate close to the second fire cover.

[0006] According to the burner of the embodiment of the utility model, by arranging the first limiting flange on the second fire cover, the supporting structure of the infrared radiation plate can be covered, and the gap between the first fire cover and the second fire cover can be covered, so as to prevent dirt from entering between the first fire cover and the second fire cover, thereby reducing the difficulty of cleaning the burner and simplifying the structure of the burner.

[0007] In addition, the burner according to the above embodiment of the utility model may also have the following additional technical features:

[0008] In some embodiments, the first limiting flange forms an annular flange extending along the circumference of the second fire cover.

[0009] In some embodiments, a first limiting step is provided at a position on the top of the infrared radiation plate near the second fire cover, and the first limiting flange has the same shape as the first limiting step and cooperates with each other.

[0010] In some embodiments, the burner further includes: a limiting ring, which is sleeved with the burner head assembly and has a second limiting flange at the upper end thereof, wherein the second limiting flange stops the infrared radiation plate at the top away from the second fire cover.

[0011] In some embodiments, the second limiting flange forms an annular flange extending along the circumference of the infrared radiation plate.

[0012] In some embodiments, a second limiting step is provided on the top of the infrared radiation plate away from the second fire cover, and the second limiting flange has the same shape as the second limiting step and cooperates with each other.

[0013] In some embodiments, a supporting portion is provided in the first annular channel for supporting the infrared radiation plate.

[0014] In some embodiments, the furnace head assembly includes an inner ring plate and an outer ring plate, wherein the outer ring plate is arranged on the outer periphery of the inner ring plate and defines the first annular channel therebetween; wherein the support portion includes a first support step, which is arranged on the outer peripheral wall of the inner ring plate; and / or the support portion includes a second support step, which is arranged on the inner peripheral wall of the outer ring plate.

[0015] In some embodiments, the infrared radiation plate is an integrally formed ring structure.

[0016] In some embodiments, the second fire cover comprises:

[0017] A lower ring plate, wherein the lower ring plate is inserted into the second annular channel;

[0018] An upper ring plate, wherein the upper ring plate is connected to the upper end of the lower ring plate, the upper ring plate gradually extends outward from bottom to top, and the first limiting flange is connected to one end of the upper ring plate close to the infrared radiation plate.

[0019] In some embodiments, the upper ring plate is provided with a plurality of fire outlet holes arranged at intervals, and the fire outlet holes gradually extend inward from bottom to top.

[0020] In some embodiments, the peripheral wall of the second fire cover has a stop step, the stop step abuts against the upper end of the channel wall of the second annular channel, and the stop step is formed on the lower ring plate and / or the upper ring plate.

[0021] The gas stove according to the embodiment of the utility model comprises the aforementioned burner.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a burner according to an embodiment of the present utility model.

[0024] Figure 2 It is a cross-sectional schematic diagram of a burner according to an embodiment of the utility model.

[0025] Figure 3 It is a schematic diagram of a first fire cover and a second fire cover of a burner according to an embodiment of the utility model.

[0026] Figure 4 yes Figure 3 Schematic diagram of the explosion.

[0027] Figure 5 It is a schematic diagram of a first fire cover and a second fire cover of a burner according to another embodiment of the utility model.

[0028] Figure 6 yes Figure 5 Schematic diagram of the explosion.

[0029] Figure 7 It is a schematic diagram from another angle of the burner of the embodiment of the utility model.

[0030] Figure 8 yes Figure 2 Enlarged schematic diagram of the center circle A.

[0031] Fig. 9 It is a schematic diagram of an explosion of a burner according to an embodiment of the utility model.

[0032] Fig.10 yes Fig. 9 Schematic cross-sectional view of .

[0033] Reference numerals:

[0034] Burner 100, burner head assembly 10, first annular channel 11, second annular channel 12, support portion 13, first support step 131, second support step 132, inner ring plate 14, outer ring plate 15, first fire cover 20, infrared radiation plate 21, first limiting step 211, second limiting step 212, second fire cover 30, first limiting flange 31, lower ring plate 32, fire outlet 321, upper ring plate 33, stop step 34, limiting ring 40, second limiting flange 41. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments 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 intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0036] Combination Figure 1 and Figure 2 According to the burner 100 of the embodiment of the utility model, it includes a burner head assembly 10, a first fire cover 20 and a second fire cover 30. The burner head assembly 10 defines a first annular channel 11 and a second annular channel 12 which are arranged in a sleeve manner, and the first annular channel 11 and the second annular channel 12 both have top openings, and the first annular channel 11 and the second annular channel 12 can be suitable for passing gas; the first fire cover 20 includes an infrared radiation plate 21, and the infrared radiation plate 21 is suitable for being installed in the first annular channel 11 from the top opening of the first annular channel 11, and gas can be supplied to the infrared radiation plate 21 through the first annular channel 11; the second fire cover 30 is arranged at the top opening of the second annular channel 12, and the second annular channel 12 can supply gas to the second fire cover 30. The upper end of the second fire cover 30 has a first limiting flange 31, and the first limiting flange 31 stops at the top of the infrared radiation plate 21 close to the second fire cover 30. The first limiting flange 31 can block the gap between the first fire cover 20 and the second fire cover 30 to prevent dirt from entering between the first fire cover 20 and the second fire cover 30, thereby reducing the difficulty of cleaning the burner 100.

[0037] In addition, the burner 100 may further include a supporting structure for supporting the infrared radiation plate 21 , and the first limiting flange 31 may also shield the supporting structure for supporting the infrared radiation plate 21 , without the need to provide an additional shielding member, thereby simplifying the structure of the burner 100 .

[0038] The first annular channel 11 may be sleeved on the outer periphery of the second annular channel 12, and the first fire cover 20 may be arranged on the outer side of the second fire cover 30, that is, the first annular channel 11 may be an outer annular channel, the second annular channel 12 may be an inner annular channel, the infrared radiation plate 21 is located on the outer side of the second fire cover 30, and the upper end of the second fire cover 30 may have a first limit flange 31 extending outward; or, the second annular channel 12 is sleeved on the outer periphery of the first annular channel 11, and the first fire cover 20 may be arranged on the inner side of the second fire cover 30, that is, the first annular channel 11 may be an inner annular channel, the second annular channel 12 may be an outer annular channel, the infrared radiation plate 21 is located on the inner side of the second fire cover 30, and the upper end of the second fire cover 30 may have a first limit flange 31 extending inward. This application does not limit this.

[0039] The first fire cover 20 may include an infrared radiation plate 21, and the second fire cover 30 may be an atmospheric fire cover. The infrared radiation plate 21 can improve the heating uniformity of the burner 100, and the atmospheric fire cover can provide concentrated firepower. The first fire cover 20 and the second fire cover 30 cooperate to improve the heating efficiency of the burner 100. Of course, the first fire cover 20 may adopt a combination of atmospheric combustion and infrared combustion, that is, the first fire cover 20 may include an infrared radiation plate 21 and an atmospheric fire cover, which may be adjusted according to needs.

[0040] According to the burner 100 of the embodiment of the utility model, by setting the first limiting flange 31 on the second fire cover 30, the support structure of the infrared radiation plate 21 can be covered, and the first limiting flange 31 can cover the gap between the first fire cover 20 and the second fire cover 30, so as to prevent dirt from entering between the first fire cover 20 and the second fire cover 30, thereby reducing the cleaning difficulty of the burner 100 and simplifying the structure of the burner 100. In addition, the first limiting flange 31 stops at the top of the infrared radiation plate 21 near the second fire cover 30, and the first limiting flange 31 can also limit the infrared radiation plate 21 to prevent the infrared radiation plate 21 from moving in the axial direction, thereby improving the structural stability of the burner 100.

[0041] The first fire cover 20 includes an infrared radiation plate 21, which may be an integrally formed structure, or the first fire cover 20 may include a plurality of infrared radiation plates 21, which may be assembled to form the first fire cover 20; or the first fire cover 20 may include an atmospheric fire cover and an infrared radiation plate 21, that is, the first fire cover 20 may have both atmospheric combustion and infrared combustion. The infrared radiation plate 21 may be a ceramic plate, a metal-ceramic composite plate, or the like.

[0042] The first fire cover 20 and the second fire cover 30 can be configured in different structures. Figure 3 and Figure 4 The first fire cover 20 may be an annular structure, and the first fire cover 20 may be arranged around the periphery of the second fire cover 30 to simplify the structure of the burner 100; for example, in combination with Figure 5 and Figure 6 The second fire cover 30 may include an inner ring fire cover and a frame, the frame is configured with a plurality of mounting openings at intervals along the circumference of the inner ring fire cover, and the first fire cover 20 may include an arc-shaped infrared radiation plate 21 corresponding to the plurality of mounting openings. Of course, the first fire cover 20 and the second fire cover 30 of the utility model may include but are not limited to the above-mentioned embodiments.

[0043] Combination Figure 7In some embodiments of the present invention, the first limiting flange 31 forms an annular flange extending along the circumference of the second fire cover 30. For example, the infrared radiation plate 21 can be arranged around the periphery of the second fire cover 30. By setting the first flange as an annular flange, the support structure of the first fire cover 20 and the gap between the first fire cover 20 and the second fire cover 30 can be completely sealed, and the limiting effect of the infrared radiation plate 21 can be improved.

[0044] Combination Figure 2 and Fig. 9 In some embodiments of the utility model, a first limiting step 211 is provided at the top of the infrared radiation plate 21 near the second fire cover 30, and the first limiting flange 31 has the same shape as the first limiting step 211 and cooperates with each other. The first limiting step 211 and the first limiting flange 31 can position the installation of the second fire cover 30, and after installation, the tops of the infrared radiation plate 21 and the second fire cover 30 are in the same plane, so that the surface of the burner 100 is flat. In addition, when the first limiting flange 31 is embedded in the first limiting step 211, the infrared radiation plate 21 can support the second fire cover 30, and the second fire cover 30 can be lifted to limit the infrared radiation plate 21 to prevent the infrared radiation plate 21 from displacement.

[0045] Combination Figure 8 and Fig. 9 In some embodiments of the utility model, the burner 100 also includes a limit ring 40, which is arranged in a sleeve arrangement with the burner head assembly 10 and has a second limit flange 41 at the upper end of the limit ring 40, and the second limit flange 41 stops the infrared radiation plate 21 away from the top of the second fire cover 30.

[0046] Specifically, the first limiting flange 31 stops at the top of the infrared radiation plate 21 close to the second fire cover 30, and the second limiting flange 41 stops at the top of the infrared radiation plate 21 away from the second fire cover 30. The first limiting flange 31 and the second limiting flange 41 cooperate to effectively limit the infrared radiation plate 21 and improve the structural stability of the infrared radiation plate 21. In addition, the second limiting flange 41 can also protect the infrared radiation plate 21.

[0047] The limiting ring 40 can be set at different positions. For example, the infrared radiation plate 21 is located on the outside of the second fire cover 30, and the upper end of the second fire cover 30 may have a first limiting flange 31 extending outward. The limiting ring 40 can be sleeved on the outside of the burner head assembly 10, and the upper end of the limiting ring 40 has a second limiting flange 41 extending inward. Or, the infrared radiation plate 21 is located on the inner side of the second fire cover 30, the limiting ring 40 is sleeved on the inner side of the burner head assembly 10, and the limiting ring 40 has a second limiting flange 41 extending outward. This application does not impose any restrictions on this. Fig. 9Furthermore, the second limiting flange 41 forms an annular flange extending along the circumference of the infrared radiation plate 21, thereby improving the limiting effect and protective effect of the infrared radiation plate 21 and improving the structural stability of the burner 100.

[0048] Combination Figure 8 and Fig. 9 In some embodiments of the utility model, a second limiting step 212 is provided at a position of the top of the infrared radiation plate 21 away from the second fire cover 30, and the second limiting flange 41 has the same shape as the second limiting step 212 and cooperates with each other. The second limiting step 212 and the second limiting flange 41 can limit the infrared radiation plate 21, and after installation, the top of the infrared radiation plate 21 and the top of the limiting ring 40 are in the same plane, so that the surface of the burner 100 is flat. In addition, when the second limiting flange 41 is embedded in the second limiting step 212, the infrared radiation plate 21 can support the limiting ring 40, and the limiting ring 40 can limit the infrared radiation plate 21 to prevent the infrared radiation plate 21 from displacement, so that the structure of the burner 100 is simple and the stability is high.

[0049] Combination Figure 2 In some embodiments of the present invention, a supporting portion 13 is provided in the first annular channel 11 for supporting the infrared radiation plate 21 to improve the structural stability of the infrared radiation plate 21 .

[0050] Among them, the supporting portion 13 can be arranged as a step structure, that is, the first annular channel 11 can be provided with a supporting step, and the infrared radiation plate 21 is supported on the supporting step; or, the first annular channel 11 is arranged as a structure that gradually expands from bottom to top, and the annular channel is adapted to the shape of the infrared radiation plate 21. In other words, the infrared radiation plate 21 can be supported by the gradually expanding annular channel; or, the first annular channel 11 is provided with a supporting member such as an iron wire for supporting the infrared radiation plate 21, and the supporting member can be connected to the first annular channel, and the infrared radiation plate 21 abuts against the supporting member.

[0051] It is understandable that the support portion 13 is used to support the infrared radiation plate 21. There will be a gap between the support portion 13 and the infrared radiation plate 21. If there is no shielding structure to shield, it is easy to cause dust, debris, etc. to enter the first annular channel 11, affecting the operation of the burner 100. In the utility model, by providing a first limiting flange 31 on the second fire cover 30, the gap between the support portion 13 and the infrared radiation plate 21 can be shielded, and there is no need to provide an additional shielding structure, thereby simplifying the structure of the burner 100.

[0052] Combination Fig.10 In some embodiments of the present invention, the furnace head assembly 10 includes an inner ring plate 14 and an outer ring plate 15. The outer ring plate 15 is arranged on the outer periphery of the inner ring plate 14 and defines a first annular channel 11 therebetween.

[0053] In some embodiments, the support portion 13 includes a first support step 131 , which is disposed on the outer peripheral wall of the inner ring plate 14 . The first support step 131 can provide vertical and horizontal support for the infrared radiation plate 21 , thereby improving the structural stability of the infrared radiation plate 21 .

[0054] In some embodiments, the support portion 13 includes a second support step 132 , which is disposed on the inner circumferential wall of the outer ring plate 15 . The second support step 132 can provide vertical and horizontal support for the infrared radiation plate 21 , thereby improving the structural stability of the infrared radiation plate 21 .

[0055] Combination Figure 8 and Fig.10 In some embodiments, the support portion 13 may include a first support step 131 and a second support step 132 at the same time. The first support step 131 and the second support step 132 simultaneously support and limit the infrared radiation plate 21, thereby improving the installation efficiency of the infrared radiation plate 21 and being able to improve the supporting effect of the infrared radiation plate 21, thereby improving the structural stability of the burner 100.

[0056] Combination Figure 7 In some embodiments of the present invention, the infrared radiation plate 21 is an integrally formed ring structure, which simplifies the structure of the infrared radiation plate 21 and improves the structural stability of the burner 100.

[0057] Exemplarily, the infrared radiation plate 21 may be disposed around the periphery of the second fire cover 30, the infrared radiation plate 21 may support the second fire cover 30, and the second fire cover 30 may limit the infrared radiation plate 21, thereby simplifying the structure of the burner 100 and improving the structural stability.

[0058] Combination Fig.10 In some embodiments of the utility model, the second fire cover 30 includes: a lower ring plate 32 and an upper ring plate 33, the lower ring plate 32 is inserted into the second annular channel 12; the upper ring plate 33 is connected to the upper end of the lower ring plate 32, and the upper ring plate 33 gradually extends outward from bottom to top, and the first limiting flange 31 is connected to one end of the upper ring plate 33 close to the infrared radiation plate 21.

[0059] Specifically, the second fire cover 30 may include a lower ring plate 32, an upper ring plate 33 and a first limiting flange 31, and the lower ring plate 32, the upper ring plate 33 and the first limiting flange 31 are arranged in sequence from bottom to top. Among them, the second fire cover 30 can be limited and supported by the cooperation of the lower ring plate 32 and the second annular channel 12, thereby improving the structural stability of the second fire cover 30, and the gas is discharged through the upper ring plate 33, and the gap between the infrared radiation plate 21 and the support part 13 can be covered by the first limiting flange 31, and the first limiting flange 31 can also limit the infrared radiation plate 21, so that the structure of the second fire cover 30 is simple and the structural stability of the burner 100 is improved.

[0060] Furthermore, the upper ring plate 33 is provided with a plurality of intervally arranged fire holes 321, and the gas in the second annular channel 12 can form flames through the fire holes 321. The fire holes 321 can gradually extend inward from bottom to top, optimize the flame of the second fire cover 30, form a concentrated flame, reduce heat loss, and improve the heating efficiency of the burner 100.

[0061] Optionally, the fire holes 321 may extend obliquely along the circumference of the second fire cover 30 to optimize the flame of the second fire cover 30 so that the fire holes 321 form a rotating fire, thereby improving the heating uniformity and heating effect.

[0062] Optionally, a flaming hole may be provided on the peripheral wall of the lower ring plate 32, and the flaming hole is communicated with the second annular channel 12. Exemplarily, the burner head assembly 10 may define a mounting cavity with a top opening, and an ignition element and / or a thermocouple may be installed on the bottom wall of the mounting cavity. By also providing a flaming hole on the peripheral wall of the lower ring plate 32, the local gas output is increased, and the ignition efficiency of the ignition element is improved.

[0063] Combination Figure 8 and Fig.10 In some embodiments, the peripheral wall of the second fire cover 30 has a stop step 34, which abuts against the upper end of the channel wall of the second annular channel 12. The stop step 34 is formed on the lower ring plate 32 and / or the upper ring plate 33. In other words, the stop step 34 can be formed on the upper ring plate 33; or, the stop step 34 is formed on the lower ring plate 32; or, the stop step 34 is formed at the intersection of the upper ring plate 33 and the lower ring plate 32. The second fire cover 30 can be supported on the upper end of the second annular channel 12 by the stop step 34, thereby improving the structural stability of the second fire cover 30.

[0064] Combination Figure 8In some specific embodiments of the utility model, the second fire cover 30 includes a first limiting flange 31 and a stop step 34. The first limiting flange 31 stops at the top of the infrared radiation plate 21 close to the second fire cover 30. The stop step 34 is supported on the upper end of the second annular channel 12. In the axial projection, the first limiting flange 31 is arranged around the outer side of the stop step 34. The stop step 34 and the first limiting flange 31 cooperate to improve the structural stability of the second fire cover 30.

[0065] The first annular channel 11 may include a supporting portion 13, which may support the infrared radiation plate 21. The second fire cover 30 may include a first limiting flange 31, which may stop at a position near the top of the infrared radiation plate 21 and the second fire cover 30. By cooperating between the supporting portion 13 and the first limiting flange 31, the infrared radiation plate may be limited from moving in the up and down directions, thereby improving the structural stability of the burner 100.

[0066] In addition, a first limiting flange 31 is provided on the second fire cover 30, and the second fire cover 30 can be overlapped on the first fire cover 20 through the first limiting flange 31, which simplifies the structure of the burner 100 and improves the installation efficiency.

[0067] The gas stove according to the embodiment of the present invention comprises the aforementioned burner 100 .

[0068] The various embodiments / implementations of the present invention can be combined with each other without causing any contradiction.

[0069] In the description of the present invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, 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 cannot be understood as a limitation on the present invention.

[0070] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0071] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 utility model. In this specification, the schematic representations of the above terms do 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. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0074] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A burner (100), characterized in that: include: A furnace head assembly (10), wherein the furnace head assembly (10) defines a first annular channel (11) and a second annular channel (12) which are arranged in a telescopic manner, wherein the first annular channel (11) and the second annular channel (12) both have a top opening; a first fire cover (20), the first fire cover (20) comprising an infrared radiation plate (21), the infrared radiation plate (21) being suitable for being installed in the first annular channel (11) from the top opening of the first annular channel (11); A second fire cover (30), wherein the second fire cover (30) is arranged at the top opening of the second annular channel (12) and the upper end of the second fire cover (30) has a first limiting flange (31), and the first limiting flange (31) stops at a position close to the second fire cover (30) at the top of the infrared radiation plate (21).

2. The burner (100) according to claim 1, characterized in that: The first limiting flange (31) forms an annular flange extending along the circumference of the second fire cover (30); And / or, a first limiting step (211) is provided at the top of the infrared radiation plate (21) near the second fire cover (30), and the first limiting flange (31) and the first limiting step (211) have the same shape and cooperate with each other.

3. The burner (100) according to claim 1, characterized in that: Also includes: A limiting ring (40), wherein the limiting ring (40) and the burner head assembly (10) are sleeved and arranged, and the upper end of the limiting ring (40) has a second limiting flange (41), and the second limiting flange (41) stops the infrared radiation plate (21) away from the top of the second fire cover (30).

4. The burner (100) according to claim 3, characterized in that: The second limiting flange (41) forms an annular flange extending along the circumference of the infrared radiation plate (21); And / or, a second limiting step (212) is provided at a position on the top of the infrared radiation plate (21) away from the second fire cover (30), and the second limiting flange (41) and the second limiting step (212) have the same shape and cooperate with each other.

5. The burner (100) according to claim 1, characterized in that: The first annular channel (11) has a supporting portion (13) therein for supporting the infrared radiation plate (21).

6. The burner (100) according to claim 5, characterized in that: The furnace head assembly (10) comprises an inner ring plate (14) and an outer ring plate (15), wherein the outer ring plate (15) is arranged on the outer periphery of the inner ring plate (14) and defines the first annular channel (11) therebetween; Wherein, the support portion (13) includes a first support step (131), and the first support step (131) is arranged on the outer peripheral wall of the inner ring plate (14); and / or the support portion (13) includes a second support step (132), and the second support step (132) is arranged on the inner peripheral wall of the outer ring plate (15).

7. The burner (100) according to any one of claims 1 to 6, characterized in that: The infrared radiation plate (21) is an integrally formed annular structure.

8. The burner (100) according to any one of claims 1 to 6, characterized in that: The second fire cover (30) comprises: a lower ring plate (32), wherein the lower ring plate (32) is inserted into the second annular channel (12); An upper ring plate (33), wherein the upper ring plate (33) is connected to the upper end of the lower ring plate (32), and the upper ring plate (33) gradually extends outward from bottom to top, and the first limiting flange (31) is connected to one end of the upper ring plate (33) close to the infrared radiation plate (21).

9. The burner (100) according to claim 8, characterized in that: The upper ring plate (33) is provided with a plurality of fire outlet holes (321) arranged at intervals, and the fire outlet holes (321) gradually extend inward from bottom to top; And / or, the peripheral wall of the second fire cover (30) has a stop step (34), the stop step (34) abuts against the upper end of the channel wall of the second annular channel (12), and the stop step (34) is formed on the lower ring plate (32) and / or the upper ring plate (33).

10. A gas stove, characterized in that: It comprises a burner (100) according to any one of claims 1-9.

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