Three-ring infrared burner

Abstract

The three-ring infrared combustor comprises a combustion body assembly, the combustion body assembly comprises a gas distribution disc, an inner gas inlet part, a middle gas inlet part and an outer gas inlet part, the gas distribution disc is provided with an upper center hole and a containing cavity located on the periphery of the upper center hole, the top of the containing cavity is open, and the bottom of the gas distribution disc is provided with the inner gas inlet part, the middle gas inlet part and the outer gas inlet part which are arranged at intervals from inside to outside in the radial direction; the partition assembly is arranged in the containing cavity and divides the containing cavity into an inner ring air chamber, a middle ring air chamber and an outer ring air chamber, the inner ring air chamber is communicated with the inner air inlet part, the middle ring air chamber is communicated with the middle air inlet part, and the outer ring air chamber is communicated with the outer air inlet part; the combustion plate is installed in the containing cavity and located on the top of the partition assembly. The three-ring infrared burner disclosed by the invention is simple in structure and concise in appearance, is provided with three-ring firepower partitions, and is convenient to detach the burning body assembly for cleaning.

Description

Technical Field

[0001] The invention relates to the technical field of burners, in particular to a three-ring infrared burner. Background Art

[0002] Most infrared stoves on the market have two or one ring fire, which cannot meet consumers' needs for more diverse firepower divisions and firepower sizes. The existing three-ring infrared burners have three-ring firepower divisions achieved through two combustion body components, which have a more complex appearance and high burner cost. In addition, when casting the three-ring burner head, the waste generated by the middle ring sand core is difficult to discharge, resulting in a low burner head manufacturing yield.

[0003] In addition, when the infrared gas stove is used for cooking, if a small amount of liquid overflows onto the combustion plate, the combustion plate with a temperature of thousands of degrees will quickly vaporize the overflow, but if a large amount of liquid overflows, the overflow will flow into the burner head and may affect the burner head's ignition. Summary of the invention

[0004] The present invention aims to solve at least one of the problems existing in the existing related technologies to a certain extent. To this end, the present invention proposes a three-ring infrared burner with a simple structure, a simple appearance, a three-ring fire power partition, and easy removal of the combustion body assembly for cleaning.

[0005] According to the three-ring infrared burner provided above, it is realized by the following technical solution:

[0006] A three-ring infrared burner comprises a combustion body assembly, wherein the combustion body assembly comprises: a gas distribution plate having an upper center hole and a accommodating cavity located outside the upper center hole and open at the top, wherein an inner air inlet portion, a middle air inlet portion and an outer air inlet portion arranged from the inside to the outside along a radial direction are provided at the bottom of the gas distribution plate; a partition assembly is arranged in the accommodating cavity and divides the accommodating cavity into an inner ring air chamber, a middle ring air chamber and an outer ring air chamber, the inner ring air chamber is connected to the inner air inlet portion, the middle ring air chamber is connected to the middle air inlet portion, and the outer ring air chamber is connected to the outer air inlet portion; and a combustion plate is installed in the accommodating cavity and located at the top of the partition assembly.

[0007] In some embodiments, the partition assembly includes an inner cup body and an outer cup body located outside the inner cup body, the inner cup body is arranged between the inner air inlet portion and the middle air inlet portion, and the inner ring air chamber is formed between the inner cup body and the inner ring wall of the air dividing plate; the outer cup body is arranged between the middle air inlet portion and the outer air inlet portion, the middle ring air chamber is formed between the outer cup body and the inner cup body, and the outer ring air chamber is formed between the outer cup body and the outer ring wall of the air dividing plate.

[0008] In some embodiments, the lower end of the outer cup body is arranged vertically, and the upper end of the outer cup body is in a flared structure with a diameter gradually increasing from bottom to top.

[0009] In some embodiments, the lower end of the inner cup body is bent outward and upward to form an inner annular groove, and the bottom of the inner annular groove abuts against the bottom of the accommodating cavity; and / or the lower end of the outer cup body is bent inward and upward to form a middle annular groove, and the bottom of the middle annular groove abuts against the bottom of the accommodating cavity.

[0010] In some embodiments, an inner ring groove opening downward is recessed at a position on the bottom of the combustion plate corresponding to the inner cup body, and the upper end of the inner cup body is embedded in the inner ring groove; and / or an outer ring groove opening downward is recessed at a position on the bottom of the combustion plate corresponding to the outer cup body, and the upper end of the outer cup body is embedded in the outer ring groove.

[0011] In some embodiments, the inner cup body and the outer cup body are independent of each other; or the inner cup body and the outer cup body are integrally formed through a connecting plate, a vent is provided on the connecting plate, and the middle air inlet is connected to the middle ring air chamber through the vent.

[0012] In some embodiments, the partition assembly is rotatably disposed in the accommodating cavity, and the relative position of the vent portion and the middle air inlet portion is adjusted by rotating the partition assembly, thereby adjusting the air intake area formed when the vent portion and the middle air inlet portion are connected.

[0013] In some embodiments, the combustion body assembly further includes an inner gasket and / or an outer gasket, wherein the inner gasket is disposed between the inner cup body and the bottom of the gas distributor plate or the bottom of the combustion plate, and the outer gasket is disposed between the outer cup body and the bottom of the gas distributor plate or the bottom of the combustion plate.

[0014] In some embodiments, the combustion body assembly also includes a heat insulation plate, which is arranged in the outer ring air chamber and below the combustion plate, and a heat insulation cavity is formed between the heat insulation plate and the outer ring wall of the gas distribution plate, the lower end of the heat insulation plate is abutted or connected to the outer edge of the external air inlet part, and a gap connected to the heat insulation cavity is formed between the upper end of the heat insulation plate and the upper end of the outer ring wall of the gas distribution plate.

[0015] In some embodiments, an outer annular groove opening upward is formed at the lower end of the heat insulation plate.

[0016] In some embodiments, a burner head assembly is further included, wherein the burner head assembly has a lower center hole, an inner ring gas mixing chamber, a middle ring gas mixing chamber and an outer ring gas mixing chamber; the bottom of the combustion body assembly can be detachably mounted on the top of the burner head assembly, the lower center hole is connected to the upper center hole, the inner ring gas mixing chamber is connected to the inner ring air chamber through the inner air intake portion, the middle ring gas mixing chamber is connected to the middle ring air chamber through the middle air intake portion, and the outer ring gas mixing chamber is connected to the outer ring air chamber through the outer air intake portion.

[0017] In some embodiments, a downwardly open air-avoiding cavity is recessed in the hole wall at the lower end of the lower center hole, and the air-avoiding cavity is communicated with the lower center hole and is located directly below the inner ring gas mixing cavity.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] 1. The three-ring infrared burner of the present invention is provided with a partition assembly in the accommodating cavity of the gas distribution plate and below the combustion plate, and the partition assembly divides the accommodating cavity into an inner ring air chamber, a middle ring air chamber and an outer ring air chamber, so that the gas distribution plate is divided into cavities by the partition assembly, so that a combustion body assembly has three-ring firepower partitions, a simple structure and a concise appearance, which is not only conducive to more precise control of firepower, but also convenient for removing the combustion body assembly for cleaning;

[0020] 2. By providing an inner annular groove at the lower end of the inner cup body and / or a middle annular groove at the lower end of the outer cup body, when a large amount of liquid overflows during cooking, the influence of the overflow on the ejection of the burner head assembly can be reduced;

[0021] 3. By inserting the upper end of the inner cup body and / or the outer cup body into the combustion plate, the inner cup body and / or the outer cup body can be used to divide the firepower of a combustion plate, which is conducive to reducing the problem of cross-fire between different firepower zones of the combustion plate, thereby effectively ensuring the low-fire and / or medium-fire combustion state;

[0022] 4. By adding a heat insulation plate in the outer ring air chamber, an insulation cavity is formed between the heat insulation plate and the outer ring wall of the gas separator, and the upper end of the heat insulation plate is matched with the upper end of the outer ring wall of the gas separator, so as to effectively block the heat radiated downward by the combustion plate and facilitate sand removal after sandblasting of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an exploded view of the combustion body assembly in Example 1 of the present invention;

[0024] Figure 2 is a cross-sectional view of a combustion body assembly in Example 1 of the present invention;

[0025] Figure 3 The structure of the gas distribution plate in Example 1 of the present invention is shown in FIG. Figure 1 ;

[0026] Figure 4 The structure of the gas distribution plate in Example 1 of the present invention is shown in FIG. Figure 2 ;

[0027] Figure 5 is a schematic structural diagram of a separation component in Example 1 of the present invention;

[0028] Figure 6 is a cross-sectional view of a partition assembly in Example 1 of the present invention;

[0029] Figure 7 is an exploded view of the combustion body assembly in Example 2 of the present invention;

[0030] Figure 8 is a cross-sectional view of a combustion body assembly in Example 2 of the present invention;

[0031] Fig. 9 is a schematic structural diagram of a separation component in Example 2 of the present invention;

[0032] Fig.10 is a cross-sectional view of a partition assembly in Example 2 of the present invention;

[0033] Fig.11 is a cross-sectional view of a combustion body assembly in Example 3 of the present invention;

[0034] Fig.12 is an exploded view of a three-ring infrared burner in Example 4 of the present invention;

[0035] Fig.13 is a cross-sectional view of a three-ring infrared burner in Example 4 of the present invention;

[0036] Fig.14 It is a schematic structural diagram of the furnace head assembly in Example 4 of the present invention.

[0037] In the figure: 1-combustion body assembly, 11-gas distribution plate, 111-upper center hole, 112-accommodating cavity, 1121-inner ring air chamber, 1122-middle ring air chamber, 1123-outer ring air chamber, 1131-inner air inlet hole, 1132-middle air inlet hole, 1133-outer air inlet hole, 1141-inner sink, 1142-outer sink, 1143-annular boss, 1151-first mating surface, 1152-second mating surface, 1153-third mating surface, 1154-fourth mating surface, 12-partitioning assembly, 121-inner cup body, 1121-inner annular groove, 122-outer cup body, 1221-middle annular groove, 1222-vertical section, 1223-expanding section, 123-connecting plate, 1231-vent, 13-combustion plate, 131-inner ring groove, 141-inner gasket, 142-outer gasket, 15-insulation board, 151-insulation cavity, 152-gap, 153-outer annular groove;

[0038] 2-burner head assembly, 211-lower center hole, 212-inner ring gas mixing chamber, 213-middle ring gas mixing chamber, 214-outer ring gas mixing chamber, 22-air-avoiding concave cavity, 231-inner ring air inlet, 241-inner ejector tube, 242-middle ejector tube, 243-outer ejector tube. DETAILED DESCRIPTION

[0039] The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the specific embodiments of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed by the present invention.

[0040] Example 1

[0041] refer to Figure 1-6The present embodiment provides a three-ring infrared burner, comprising a combustion body assembly 1, the combustion body assembly 1 comprising a gas distribution plate 11, a partition assembly 12 and a combustion plate 13, wherein the gas distribution plate 11 has an upper center hole 111 with openings at both ends, and a receiving cavity 112 located outside the upper center hole 111 and open at the top, and the upper center hole 111 is used for the ignition assembly in the three-ring infrared burner to pass vertically. An inner air intake portion, a middle air intake portion and an outer air intake portion arranged from the inside to the outside in a radial direction are provided at the bottom of the gas distribution plate 11. The partition assembly 12 is arranged in the receiving cavity 112, and the receiving cavity 112 is divided into an inner ring air chamber 1121, a middle ring air chamber 1122 and an outer ring air chamber 1123 arranged from the inside to the outside in a radial direction, the inner ring air chamber 1121 is connected to the inner air intake portion, the middle ring air chamber 1122 is connected to the middle air intake portion, and the outer ring air chamber 1123 is connected to the outer air intake portion. The combustion plate 13 is an annular structure, which is installed in the accommodating cavity 112 and located at the top of the partition assembly 12, and the inner and outer ends of the combustion plate 13 in the radial direction are respectively in contact with the inner ring wall and the outer ring wall of the gas distribution plate 11. When the mixed gas in the inner ring air chamber 1121 is transmitted upward and ignited on the combustion plate 13, an inner ring fire is formed, when the mixed gas in the middle ring air chamber 1122 is transmitted upward and ignited on the combustion plate 13, a middle ring fire is formed, and when the mixed gas in the outer ring air chamber 1123 is transmitted upward and ignited on the combustion plate 13, an outer ring fire is formed, thereby forming three fire zones on the combustion plate.

[0042] It can be seen that the gas distribution plate 11 is divided into cavities by the partition assembly 12, so that a combustion body assembly has a three-ring firepower partition. Compared with the existing infrared burner with two combustion body assemblies, the three-ring infrared burner in this embodiment has only one combustion body assembly 1, which has a simpler structure and a simpler appearance. It is not only beneficial to reduce the cost of the burner and meet different firepower requirements during cooking, but also easy to achieve more precise control of firepower and convenient to remove the combustion body assembly 1 for cleaning.

[0043] refer to Figure 1-4 In this embodiment, the gas distribution plate 11 is an integrally formed structure, which is formed by stamping a sheet metal part. The inner air inlet portion includes a plurality of inner air inlet holes 1131 arranged at intervals along the circumferential direction of the bottom of the gas distribution plate, the middle air inlet portion includes a plurality of middle air inlet holes 1132 arranged at intervals along the circumferential direction of the bottom of the gas distribution plate, and the outer air inlet portion includes a plurality of outer air inlet holes 1133 arranged at intervals along the circumferential direction of the bottom of the gas distribution plate.

[0044] Specifically, an inner recessed platform 1141 and an outer recessed platform 1142 are recessed at the bottom of the gas distribution plate 11. The inner recessed platform 1141 is located between the inner air inlet portion and the middle air inlet portion, and is used to support the inner cup body 121 in the partition assembly 12. The outer recessed platform 1142 is located between the middle air inlet portion and the outer air inlet portion, and is used to support the outer cup body 122 in the partition assembly 12. An annular boss 1143 is convexly provided at the bottom of the gas distribution plate 11 and is located on the periphery of the outer air inlet portion, and is used to support the heat insulation plate 15. In addition, a first mating surface 1151, a second mating surface 1152, a third mating surface 1153 and a fourth mating surface 1154 are provided at the bottom of the gas distribution plate 11, which are arranged from the inside to the outside in a radial direction. The first mating surface 1151 is higher than the fourth mating surface 1154, and the fourth mating surface 1154 is higher than the second mating surface 1152 and the third mating surface. The four mating surfaces are used to seal and connect with the burner head assembly 2 in the burner to prevent gas leakage at the mating point between the burner head assembly 2 and the gas distribution plate 11 or the combustion body assembly 1.

[0045] refer to Figure 1-2 and Figure 5-6 Specifically, the partition assembly 12 includes an inner cup body 121 and an outer cup body 122 located outside the inner cup body 121. The inner cup body 121 is arranged between the inner air inlet portion and the middle air inlet portion, and the upper and lower ends of the inner cup body 121 are respectively abutted or connected to the bottom of the accommodating cavity 112 and the bottom of the combustion plate 13, and an inner annular air chamber 1121 is formed between the inner cup body 121 and the inner annular wall of the gas distribution plate 11. The outer cup body 122 is arranged between the middle air inlet portion and the outer air inlet portion, and the upper and lower ends of the outer cup body 122 are respectively abutted or connected to the bottom of the accommodating cavity 112 and the bottom of the combustion plate 13, and a middle annular air chamber 1122 is formed between the outer cup body 122 and the inner cup body 121, and an outer annular air chamber 1123 is formed between the outer cup body 122 and the outer annular wall of the gas distribution plate 11. Thus, the accommodating cavity 112 of the gas distribution disk 11 is divided into three gas chambers by using the inner cup body 121 and the outer cup body 122 .

[0046] In this embodiment, the inner cup body 121 and the outer cup body 122 are independent of each other, wherein the inner cup body 121 is roughly a hollow cylinder, and the bottom of the inner cup body 121 is abutted against the inner sinking platform 1141 of the gas distribution plate 11; the outer cup body 122 includes a vertical section 1222 and a flared section 1223, the lower end of the vertical section 1222 is abutted against the outer sinking platform 1142 of the gas distribution plate 11, and the upper end is tightly abutted against the bottom of the combustion plate 13 through the flared section 1223. At this time, the lower end of the outer cup body 122 is arranged vertically, and the upper end of the outer cup body 122 is a flared structure with a diameter gradually increasing from bottom to top, so that the volume of the middle ring air chamber 1122 gradually increases from bottom to top, which is not only beneficial to increase the firepower range of the middle ring, but also the flared section 1223 can block the heat radiated downward by the combustion plate 13 to a certain extent, which is beneficial to improve thermal efficiency.

[0047] refer to Figure 1-2 and Figure 5-6 In addition, the lower end of the inner cup body 121 is bent outward and upward to form an inner annular groove 1121, and the bottom of the inner annular groove 1121 abuts against the bottom of the accommodating cavity 112. In this embodiment, the bottom of the inner annular groove 1121 abuts against the inner sink 1141 of the gas distribution plate 11, thereby increasing the contact surface between the inner cup body 121 and the gas distribution plate 11, which is conducive to improving the installation stability and reliability of the inner cup body 121 and the sealing performance between the inner cup body and the gas distribution plate. Secondly, the inner cup body has a certain temporary liquid storage function. When a large amount of overflow occurs when the user cooks, the influence of the overflow on the induced emission of the stove head assembly can be reduced; and / Or the lower end of the outer cup body 122 is bent inward and upward to form a middle annular groove 1221, and the bottom of the middle annular groove 1221 is in contact with the bottom of the accommodating cavity 112. In the present embodiment, the bottom of the middle annular groove 1221 is in contact with the outer sinking platform 1142 of the gas distribution plate 11, thereby increasing the contact surface between the outer cup body 122 and the gas distribution plate 11, which is beneficial to improving the installation stability and reliability of the outer cup body 122 and the sealing performance between the outer cup body 122 and the gas distribution plate. Secondly, the outer cup body 122 has a certain temporary liquid holding function. When a large amount of overflow occurs during cooking, the influence of the overflow on the induced discharge of the stove head assembly can be reduced.

[0048] refer to Figure 1-3 Furthermore, the combustion body assembly 1 also includes an inner gasket 141 and / or an outer gasket 142. The inner gasket 141 is arranged between the inner cup body 121 and the bottom of the gas distribution disk 11 or the bottom of the combustion plate 13 to float and adjust the sealing between the inner cup body 121 and the gas distribution disk 11 and the combustion plate 13 to prevent the inner and middle ring air chambers from being mutually gas-contaminated; the outer gasket 142 is arranged between the outer cup body 122 and the bottom of the gas distribution disk 11 or the bottom of the combustion plate 13 to float and adjust the sealing between the outer cup body 122 and the gas distribution disk 11 and the combustion plate 13 to prevent the outer and middle ring air chambers from being mutually gas-contaminated.

[0049] In this embodiment, the inner gasket 141 and the outer gasket 142 are resistant to high temperatures and are preferably ceramic fiber gaskets. The inner gasket 141 is sandwiched between the bottom of the inner cup 121 and the inner sink 1141 of the gas distribution plate 11, and the outer gasket 142 is sandwiched between the bottom of the outer cup 122 and the outer sink 1142 of the gas distribution plate 11, so that the inner cup and the outer cup can be adjusted in a floating manner in the vertical direction, so that the top of the inner cup is always in close contact with the lower surface of the combustion plate 13, to prevent the ring fires from inter-gassing.

[0050] refer to Figure 1-2Furthermore, the combustion body assembly 1 also includes a heat insulation board 15, which is arranged in the outer ring air chamber 1123 and is located below the combustion plate 13. A heat insulation cavity 151 is formed between the heat insulation board 15 and the outer ring wall of the gas separation plate 11 to reduce the heat radiation to the outer ring wall of the gas separation plate 11, which is conducive to reducing heat loss and temperature rise of the gas separation plate 11. The lower end of the heat insulation board 15 is abutted or connected to the outer edge of the outer air inlet portion. In this embodiment, the lower end of the heat insulation board 15 is abutted or connected to the top wall of the annular boss 1143 of the gas separation plate 11; a gap 152 connected to the heat insulation cavity 151 is formed between the upper end of the heat insulation board 15 and the upper end of the outer ring wall of the gas separation plate 11, so as to facilitate the sand discharge of the workpiece after sandblasting (sandblasting is required to increase the adhesion of the workpiece spraying), and effectively solve the problem that sand will enter between the gas separation plate 11 and the heat insulation board 15 after sandblasting and is difficult to discharge.

[0051] In this embodiment, an outer annular groove 153 opening upward is recessed at the lower end of the heat insulation plate 15, and the outer annular groove 153 is located at the periphery of the outer air intake portion, so that the heat insulation plate 15 has a certain temporary liquid holding function. When a large amount of liquid overflows during cooking, the impact of the overflow on the burner head assembly can be reduced.

[0052] Example 2

[0053] refer to Figure 7-10 , the difference between this embodiment and embodiment 1 is that the partition assembly 12 is an integrated stamping structure. Specifically, the partition assembly 12 includes an inner cup body 121, an outer cup body 122 and a connecting plate 123, the inner cup body 121 and the outer cup body 122 are integrally formed through the connecting plate 123, a vent is provided on the connecting plate 123, and the middle air inlet is connected to the middle ring air chamber 1122 through the vent. In this embodiment, the vent includes a plurality of vent holes 1231 arranged at intervals along the circumferential direction of the connecting plate 123, and the plurality of vent holes 1231 correspond one by one to the plurality of middle air inlet holes 1132 on the gas distribution plate 11 and are arranged in communication. It can be seen that by designing the partition assembly 12 as an integrated stamping structure, the structure of the partition assembly 12 is simpler and the disassembly and assembly are easier.

[0054] In addition, the partition component 12 can be configured to be rotatably disposed in the accommodating cavity 112, and the relative position of the ventilation portion and the middle air inlet portion can be adjusted by rotating the partition component 12, thereby adjusting the air intake area formed when the ventilation portion and the middle air inlet portion are connected, so that the partition component 12 has a cavity dividing and heat insulation function, and the relative position of the ventilation portion of the connecting plate 123 and the middle air inlet portion of the gas distribution plate 11 can be changed by rotating the partition component 12, thereby effectively blocking the heat radiated downward by the combustion plate 13, which is beneficial to improving thermal efficiency and reducing the temperature rise of the burner head assembly 2.

[0055] In this embodiment, the connecting plate 123 includes an annular plane section and an annular inclined section. The annular plane section is located at the periphery of the annular inclined section and is higher than the annular inclined section. The radial outer end of the annular plane section is integrally formed with the outer cup body 122. Specifically, the radial outer end of the annular plane section is integrally formed with the upper end of the inner groove wall of the middle annular groove 1221 of the outer cup body 122. The annular inclined section is arranged from the annular plane section toward the inner cup body 121 and is inclined downward. The annular inclined section is formed by bending downward integrally with the radial inner end of the annular plane section, and the radial inner end of the annular inclined section is integrally formed with the inner cup body 121. Specifically, the radial inner end of the annular inclined section is integrally formed with the upper end of the outer groove wall of the inner annular groove 1211 of the inner cup body 121. A vent is provided on the annular inclined section.

[0056] Example 3

[0057] refer to Fig.11 , the difference between this embodiment and embodiment 1 or 2 is that the matching relationship between the partition assembly 12 and the combustion plate 13 is different. Specifically, an inner ring groove 131 opening downward is recessed at the position of the bottom of the combustion plate 13 corresponding to the inner cup body 121, and the upper end of the inner cup body 121 is embedded in the inner ring groove 131, so that the inner cup body can divide the combustion plate 13 into fire zones, which is beneficial to reduce the problem of cross-fire between the inner and middle fire zones of the combustion plate 13, thereby effectively ensuring a low-fire combustion state; and / or an outer ring groove opening downward is recessed at the position of the bottom of the combustion plate 13 corresponding to the outer cup body 122, and the upper end of the outer cup body 122 is embedded in the outer ring groove, so that the outer cup body can divide the combustion plate 13 into fire zones, which is beneficial to reduce the problem of cross-fire between the outer and middle fire zones of the combustion plate 13, thereby effectively ensuring a medium-fire combustion state.

[0058] In addition, since the upper ends of the inner cup body 121 and / or the outer cup body 122 are inserted into the combustion plate 13, the partition assembly 12 is driven to rotate by rotating the combustion plate 13 to adjust the relative position between the partition assembly 12 and the gas distribution plate.

[0059] Example 4

[0060] refer to Figure 12-14The difference between this embodiment and embodiment 1, 2 or 3 is that the three-ring infrared burner also includes a burner head assembly 2, the burner head assembly 2 has a lower center hole 211 with openings at both ends, an inner ring gas mixing chamber 212 with an open top, a middle ring gas mixing chamber 213 with an open top and an outer ring gas mixing chamber 214 with an open top, and the burner head assembly 2 is also provided with an inner ejector tube 241, a middle ejector tube 242 and an outer ejector tube 243, the inner ejector tube 241 is connected to the inner ring gas mixing chamber 212, the middle ejector tube 242 is connected to the middle ring gas mixing chamber 213, and the outer ejector tube 243 is connected to the outer ring gas mixing chamber. The combustion body assembly 1 is detachably mounted on the top of the burner head assembly 2, the lower center hole 211 is connected to the upper center hole 111, the inner ring gas mixing chamber 212 is connected to the inner ring air chamber 1121 through the inner air inlet, the middle ring gas mixing chamber 213 is connected to the middle ring air chamber 1122 through the middle air inlet, and the outer ring gas mixing chamber 214 is connected to the outer ring air chamber 1123 through the outer air inlet. In this embodiment, the first mating surface 1151 and the second mating surface 1152 of the gas distribution plate 11 are respectively used to be sealed and connected to the top of the inner and outer side walls of the inner ring gas mixing chamber 212, and the third assembly surface 1153 and the fourth assembly surface 1154 of the gas distribution plate 11 are respectively used to be sealed and connected to the top of the inner and outer side walls of the outer ring gas mixing chamber 214, so as to ensure the airtightness of the combustion body assembly 1 after being installed on the burner head assembly 2.

[0061] In this embodiment, a downwardly opening air-avoiding cavity 22 is provided in the hole wall at the lower end of the lower center hole 211, and the air-avoiding cavity 22 is connected to the lower center hole 211 and is located directly below the inner ring gas mixing cavity 212, so that the lower side of the furnace head assembly 2 is partially hollowed out to facilitate the discharge of the waste of the middle ring sand core at high temperature when casting the furnace head assembly, thereby reducing gas waste. A vertically arranged inner ring air inlet 231 is provided in the furnace head assembly 2, and the inner ring air inlet 231 is located between the two free ends of the annular cavity 22, and the upper end of the inner ring air inlet 231 is connected to the inner ring gas mixing cavity 212, and the lower end is connected to the inner ejector tube 241 of the furnace head assembly 2.

[0062] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A three-ring infrared burner, comprising a combustion body assembly (1), characterized in that: The combustion body assembly (1) comprises: The gas distribution plate (11) has an upper central hole (111) and a receiving cavity (112) located outside the upper central hole (111) and open at the top, and an inner air inlet portion, a middle air inlet portion and an outer air inlet portion are arranged at intervals from the inside to the outside in a radial direction at the bottom of the gas distribution plate (11); a partition assembly (12) disposed in the accommodating chamber (112) and dividing the accommodating chamber (112) into an inner ring air chamber (1121), a middle ring air chamber (1122) and an outer ring air chamber (1123), wherein the inner ring air chamber (1121) is connected to the inner air inlet portion, the middle ring air chamber (1122) is connected to the middle air inlet portion, and the outer ring air chamber (1123) is connected to the outer air inlet portion; and A combustion plate (13) is installed in the accommodating cavity (112) and is located on the top of the partition assembly (12).

2. A three-ring infrared burner according to claim 1, characterized in that: The partition assembly (12) comprises an inner cup body (121) and an outer cup body (122) located on the periphery of the inner cup body (121); the inner cup body (121) is arranged between the inner air inlet portion and the middle air inlet portion, and the inner annular air chamber (1121) is formed between the inner cup body (121) and the inner annular wall of the air distribution plate (11); the outer cup body (122) is arranged between the middle air inlet portion and the outer air inlet portion, and the middle annular air chamber (1122) is formed between the outer cup body (122) and the inner cup body (121), and the outer annular air chamber (1123) is formed between the outer cup body (122) and the outer annular wall of the air distribution plate (11).

3. A three-ring infrared burner according to claim 2, characterized in that: The lower end of the outer cup body (122) is arranged vertically, and the upper end of the outer cup body (122) is in a flared structure with a diameter gradually increasing from bottom to top.

4. A three-ring infrared burner according to claim 2, characterized in that: The lower end of the inner cup body (121) is bent outward and upward to form an inner annular groove (1121), and the bottom of the inner annular groove (1121) is in contact with the bottom of the accommodating cavity (112); and / or the lower end of the outer cup body (122) is bent inward and upward to form a middle annular groove (1221), and the bottom of the middle annular groove (1221) is in contact with the bottom of the accommodating cavity (112).

5. A three-ring infrared burner according to claim 2, characterized in that: An inner ring groove (131) opening downward is recessed at a position on the bottom of the combustion plate (13) corresponding to the inner cup body (121), and the upper end of the inner cup body (121) is embedded in the inner ring groove (131); and / or an outer ring groove opening downward is recessed at a position on the bottom of the combustion plate (13) corresponding to the outer cup body (122), and the upper end of the outer cup body (122) is embedded in the outer ring groove.

6. A three-ring infrared burner according to any one of claims 2 to 5, characterized in that: The inner cup body (121) and the outer cup body (122) are independent of each other; or the inner cup body (121) and the outer cup body (122) are integrally formed via a connecting plate (123), a vent is provided on the connecting plate (123), and the middle air inlet is connected to the middle ring air chamber (1122) via the vent.

7. A three-ring infrared burner according to claim 6, characterized in that: The partition component (12) is rotatably disposed in the accommodating chamber (112), and the relative position of the vent portion and the middle air inlet portion is adjusted by rotating the partition component (12), thereby adjusting the air inlet area formed when the vent portion and the middle air inlet portion are connected.

8. A three-ring infrared burner according to any one of claims 2 to 5, characterized in that: The combustion body assembly (1) further comprises an inner gasket (141) and / or an outer gasket (142); the inner gasket (141) is arranged between the inner cup body (121) and the bottom of the gas distribution plate (11) or the bottom of the combustion plate (13); and the outer gasket (142) is arranged between the outer cup body (122) and the bottom of the gas distribution plate (11) or the bottom of the combustion plate (13).

9. A three-ring infrared burner according to claim 1, characterized in that: The combustion body assembly (1) also includes a heat insulation plate (15), which is arranged in the outer ring air chamber (1123) and is located below the combustion plate (13), and a heat insulation cavity (151) is formed between the heat insulation plate (15) and the outer ring wall of the gas distribution plate (11), and the lower end of the heat insulation plate (15) is abutted or connected to the outer edge of the outer air inlet portion, and a gap (152) connected to the heat insulation cavity (151) is formed between the upper end of the heat insulation plate (15) and the upper end of the outer ring wall of the gas distribution plate (11).

10. A three-ring infrared burner according to claim 9, characterized in that: An outer annular groove (153) opening upward is concavely provided at the lower end of the heat insulation plate (15).

11. A three-ring infrared burner according to any one of claims 1 to 5 or any one of claims 8 to 9, characterized in that: The invention also comprises a burner head assembly (2), wherein the burner head assembly (2) has a lower center hole (211), an inner ring gas mixing chamber (212), a middle ring gas mixing chamber (213) and an outer ring gas mixing chamber (214); the bottom of the combustion body assembly (1) is detachably mounted on the top of the burner head assembly (2); the lower center hole (211) is connected to the upper center hole (111); the inner ring gas mixing chamber (212) is connected to the inner ring air chamber (1121) through the inner air inlet; the middle ring gas mixing chamber (213) is connected to the middle ring air chamber (1122) through the middle air inlet; and the outer ring gas mixing chamber (214) is connected to the outer ring air chamber (1123) through the outer air inlet.

12. A three-ring infrared burner according to claim 11, characterized in that: A downwardly open air-avoiding cavity (22) is recessed in the hole wall at the lower end of the lower central hole (211); the air-avoiding cavity (22) is communicated with the lower central hole (211) and is located directly below the inner ring gas mixing cavity (212).

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