Three-ring infrared burner

Abstract

The utility model discloses a three-ring infrared combustor which comprises a combustion body assembly, and the combustion body assembly comprises a gas distribution disc, a gas distribution plate, a gas distribution plate, a gas distribution plate, a gas distribution plate, a gas distribution plate, a gas distribution plate, a gas distribution plate, a gas distribution plate and a gas distribution plate, wherein the gas distribution plate is provided with an upper center hole and a containing cavity; an inner air inlet part, a middle air inlet part and an outer air inlet part which are arranged at intervals from inside to outside in the radial direction are arranged at the bottom of the air distribution disc; 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 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] This utility model relates to the field of burner technology, and in particular to a three-ring infrared burner. Background Technology

[0002] Most infrared cooktops on the market have two or one ring burners, which cannot meet consumers' diverse needs for firepower zones and intensity. Existing three-ring infrared burners achieve their three-ring firepower zones through two combustion body components, resulting in a more complex appearance and higher burner costs. Furthermore, during the casting of the three-ring burner head, the waste generated from the middle ring sand core is difficult to remove, leading to a lower burner head manufacturing yield.

[0003] In addition, when cooking with an infrared gas stove, if a small amount of liquid spills onto the burner plate, the high temperature of the burner plate will quickly vaporize the spilled liquid. However, if a large amount of liquid spills, the liquid will flow into the burner head, which may affect the burner head's injection. Summary of the Invention

[0004] This utility model aims to at least partially solve one of the problems existing in the prior art. To this end, this utility model proposes a three-ring infrared burner with a simple structure, a concise appearance, three-ring fire zone, and easy disassembly of the burner components for cleaning.

[0005] The three-ring infrared burner described above is achieved through the following technical solution:

[0006] A three-ring infrared burner includes a burner assembly, wherein the burner assembly includes: a gas distribution plate having an upper central hole and a receiving cavity located around the upper central hole and open at the top; an inner air inlet, a middle air inlet, and an outer air inlet arranged radially from the inside to the outside at a distance from the inside to the outside; a partition assembly disposed within the receiving cavity and dividing the receiving cavity into an inner ring chamber, a middle ring chamber, and an outer ring chamber, wherein the inner ring chamber is connected to the inner air inlet, the middle ring chamber is connected to the middle air inlet, and the outer ring chamber is connected to the outer air inlet; and a combustion plate installed within the receiving cavity and located at the top of the partition assembly.

[0007] In some embodiments, the separating assembly includes an inner cup and an outer cup located around the inner cup. The inner cup is disposed between the inner air intake and the middle air intake, and an inner annular chamber is formed between the inner cup and the inner annular wall of the air distribution plate. The outer cup is disposed between the middle air intake and the outer air intake, and a middle annular chamber is formed between the outer cup and the inner cup. An outer annular chamber is formed between the outer cup and the outer annular wall of the air distribution plate.

[0008] In some embodiments, the lower end of the outer cup is arranged vertically, and the upper end of the outer cup has a flared structure with the 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, the bottom of the inner annular groove abutting against the bottom of the receiving cavity; and / or the lower end of the outer cup body is bent inward and upward to form a middle annular groove, the bottom of the middle annular groove abutting against the bottom of the receiving cavity.

[0010] In some embodiments, a downward-opening inner ring groove is recessed at the bottom of the combustion plate corresponding to the position of the inner cup, and the upper end of the inner cup is fitted into the inner ring groove; and / or a downward-opening outer ring groove is recessed at the bottom of the combustion plate corresponding to the position of the outer cup, and the upper end of the outer cup is fitted into 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 by a connecting plate, and a vent is provided on the connecting plate, and the middle air inlet is connected to the middle annular air chamber through the vent.

[0012] In some embodiments, the partition assembly is rotatably disposed within the receiving cavity, and the relative position of the venting section and the middle air intake section is adjusted by rotating the partition assembly, thereby adjusting the air intake area formed when the venting section and the middle air intake section are in communication.

[0013] In some embodiments, the combustor assembly further includes an inner gasket and / or an outer gasket, the inner gasket being disposed between the inner cup and the bottom of the gas distribution plate or the bottom of the combustion plate, and the outer gasket being disposed between the outer cup and the bottom of the gas distribution plate or the bottom of the combustion plate.

[0014] In some embodiments, the combustion body assembly further includes a heat insulation plate disposed in the outer annular chamber and located below the combustion plate. A heat insulation cavity is formed between the heat insulation plate and the outer annular wall of the air distribution plate. The lower end of the heat insulation plate abuts against or connects to the outer edge of the outer air intake. A gap communicating with the heat insulation cavity is formed between the upper end of the heat insulation plate and the upper end of the outer annular wall of the air distribution plate.

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

[0016] In some embodiments, a burner assembly is also included, the burner assembly having a lower central hole, an inner ring mixing chamber, a middle ring mixing chamber, and an outer ring mixing chamber; the bottom of the burner assembly is detachably mounted on the top of the burner assembly, the lower central hole is connected to the upper central hole, the inner ring mixing chamber is connected to the inner ring chamber through the inner air inlet, the middle ring mixing chamber is connected to the middle ring chamber through the middle air inlet, and the outer ring mixing chamber is connected to the outer ring chamber through the outer air inlet.

[0017] In some embodiments, a downward-opening clearance cavity is provided in the hole wall at the lower end of the lower central hole. The clearance cavity is connected to the lower central hole and is located directly below the inner annular mixing chamber.

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

[0019] 1. The three-ring infrared burner of this utility model, by setting the dividing component in the receiving cavity of the gas distribution plate and located below the combustion plate, divides the receiving cavity into an inner ring gas chamber, a middle ring gas chamber and an outer ring gas chamber, thereby realizing the division of the gas distribution plate by the dividing component, so that a combustion body assembly has three ring fire zones. The structure is simple and the appearance is concise. It not only helps to achieve more precise control of firepower, but also makes it easy to remove the combustion body assembly for cleaning.

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

[0021] 3. By inserting the upper end of the inner cup and / or outer cup into the combustion plate, the inner cup and / or outer cup are used to divide the fire zone of a combustion plate, which helps to reduce the cross-flow of air between different fire zones of the combustion plate, thereby effectively ensuring the combustion state of small fire and / or medium fire.

[0022] 4. By adding a heat insulation plate in the outer annular chamber, a heat insulation cavity is formed between the heat insulation plate and the outer annular wall of the gas distribution plate. The upper end of the heat insulation plate is fitted with the upper end of the outer annular wall of the gas distribution plate with a gap. This can effectively block the heat radiated downward by the combustion plate and facilitate the removal of sand after the workpiece is sanded. Attached Figure Description

[0023] Figure 1 This is an exploded view of the combustion body assembly in Embodiment 1 of this utility model;

[0024] Figure 2 This is a cross-sectional view of the combustion body assembly in Embodiment 1 of this utility model;

[0025] Figure 3This is a schematic diagram of the structure of the gas distribution plate in Embodiment 1 of this utility model. Figure 1 ;

[0026] Figure 4 This is a schematic diagram of the structure of the gas distribution plate in Embodiment 1 of this utility model. Figure 2 ;

[0027] Figure 5 This is a schematic diagram of the structure of the separator component in Embodiment 1 of this utility model;

[0028] Figure 6 This is a cross-sectional view of the separator component in Embodiment 1 of this utility model;

[0029] Figure 7 This is an exploded view of the combustion body assembly in Embodiment 2 of this utility model;

[0030] Figure 8 This is a cross-sectional view of the combustion body assembly in Embodiment 2 of this utility model;

[0031] Figure 9 This is a schematic diagram of the structure of the separator component in Embodiment 2 of this utility model;

[0032] Figure 10 This is a cross-sectional view of the separator component in Embodiment 2 of this utility model;

[0033] Figure 11 This is a cross-sectional view of the combustion body assembly in Embodiment 3 of this utility model;

[0034] Figure 12 This is an exploded view of the three-ring infrared burner in Embodiment 4 of this utility model;

[0035] Figure 13 This is a cross-sectional view of the three-ring infrared burner in Embodiment 4 of this utility model;

[0036] Figure 14 This is a schematic diagram of the burner assembly in Embodiment 4 of this utility model.

[0037] In the diagram: 1-Combustion body assembly, 11-Gas distribution plate, 111-Upper central hole, 112-Receiving cavity, 1121-Inner annular chamber, 1122-Middle annular chamber, 1123-Outer annular chamber, 1131-Inner air inlet, 1132-Middle air inlet, 1133-Outer air inlet, 1141-Inner recessed platform, 1142-Outer recessed platform, 1143-Annular boss, 1151-First mating surface, 1152-Second mating surface, 1153-Third mating surface. 1154-Fourth mating surface, 12-Separation component, 121-Inner cup body, 1211-Inner annular groove, 122-Outer cup body, 1221-Middle annular groove, 1222-Vertical section, 1223-Flanged section, 123-Connecting plate, 1231-Ventilation hole, 13-Combustion plate, 131-Inner annular groove, 141-Inner gasket, 142-Outer gasket, 15-Heat insulation plate, 151-Heat insulation cavity, 152-Gap, 153-Outer annular groove;

[0038] 2-Furnace head assembly, 211-Lower center hole, 212-Inner ring mixing chamber, 213-Middle ring mixing chamber, 214-Outer ring mixing chamber, 22-Void recess, 231-Inner ring air inlet, 241-Inner ejector tube, 242-Middle ejector tube, 243-Outer ejector tube. Detailed Implementation

[0039] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific implementation of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solution claimed by the present invention.

[0040] Example 1

[0041] refer to Figure 1-6This embodiment provides a three-ring infrared burner, including a burner assembly 1. The burner assembly 1 includes a gas distribution plate 11, a partitioning component 12, and a combustion plate 13. The gas distribution plate 11 has an upper central hole 111 with openings at both the upper and lower ends, and a receiving cavity 112 located around the upper central hole 111 and open at the top. The upper central hole 111 is used for the vertical passage of the ignition component in the three-ring infrared burner. An inner air intake, a middle air intake, and an outer air intake are arranged radially from the inside to the outside at intervals at the bottom of the gas distribution plate 11. The partitioning component 12 is disposed in the receiving cavity 112 and divides the receiving cavity 112 into an inner ring air chamber 1121, a middle ring air chamber 1122, and an outer ring air chamber 1123 arranged radially from the inside to the outside. The inner ring air chamber 1121 is connected to the inner air intake, the middle ring air chamber 1122 is connected to the middle air intake, and the outer ring air chamber 1123 is connected to the outer air intake. The combustion plate 13 has an annular structure, is installed in the receiving cavity 112 and located on top of the partition assembly 12, and its inner and outer ends in the radial direction abut against the inner and outer annular walls of the gas distribution plate 11, respectively. When the mixed gas in the inner annular chamber 1121 is transported upward and ignited on the combustion plate 13, an inner annular flame is formed; when the mixed gas in the middle annular chamber 1122 is transported upward and ignited on the combustion plate 13, a middle annular flame is formed; and when the mixed gas in the outer annular chamber 1123 is transported upward and ignited on the combustion plate 13, an outer annular flame is formed, thereby forming three fire zones on the combustion plate.

[0042] As can be seen, by dividing the gas distribution plate 11 into chambers by the dividing component 12, a single combustion element assembly can have three-ring fire zone. Compared with the existing infrared burners with two combustion element assemblies, the three-ring infrared burner in this embodiment has only one combustion element assembly 1, which has a simpler structure and a more concise appearance. This not only helps to reduce the cost of the burner and meet different firepower requirements during cooking, but also makes it easier to achieve more precise firepower control. Furthermore, it is convenient to remove the combustion element assembly 1 for cleaning.

[0043] refer to Figure 1-4 In this embodiment, the air distribution plate 11 is a one-piece molded structure, formed by stamping sheet metal. The inner air intake includes a plurality of inner air intake holes 1131 spaced apart along the circumferential direction of the bottom of the air distribution plate, the middle air intake includes a plurality of middle air intake holes 1132 spaced apart along the circumferential direction of the bottom of the air distribution plate, and the outer air intake includes a plurality of outer air intake holes 1133 spaced apart along the circumferential direction of the bottom of the air distribution plate.

[0044] Specifically, an inner recessed platform 1141 and an outer recessed platform 1142 are recessed at the bottom of the air distribution plate 11. The inner recessed platform 1141 is located between the inner air intake and the middle air intake and is used to support the inner cup 121 in the partition assembly 12. The outer recessed platform 1142 is located between the middle air intake and the outer air intake and is used to support the outer cup 122 in the partition assembly 12. An annular protrusion 1143 is protruding at the bottom of the air distribution plate 11, located around the outer air intake, and is used to support the heat insulation plate 15. In addition, at the bottom of the gas distribution plate 11, there are a first mating surface 1151, a second mating surface 1152, a third mating surface 1153 and a fourth mating surface 1154 arranged radially from the inside to the outside. 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 the connection 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 burner body assembly 1.

[0045] refer to Figure 1-2 and Figure 5-6 Specifically, the separator assembly 12 includes an inner cup 121 and an outer cup 122 located around the inner cup 121. The inner cup 121 is disposed between the inner air intake and the middle air intake, and its upper and lower ends abut or connect with the bottom of the receiving cavity 112 and the bottom of the combustion plate 13, respectively. An inner annular chamber 1121 is formed between the inner cup 121 and the inner annular wall of the air distribution plate 11. The outer cup 122 is disposed between the middle air intake and the outer air intake, and its upper and lower ends abut or connect with the bottom of the receiving cavity 112 and the bottom of the combustion plate 13, respectively. A middle annular chamber 1122 is formed between the outer cup 122 and the inner cup 121, and an outer annular chamber 1123 is formed between the outer cup 122 and the outer annular wall of the air distribution plate 11. This allows the inner cup 121 and the outer cup 122 to divide the receiving cavity 112 of the air distribution plate 11 into three air chambers.

[0046] In this embodiment, the inner cup 121 and the outer cup 122 are independent of each other. The inner cup 121 is generally a hollow cylinder, and its bottom abuts against the inner recessed platform 1141 of the gas distribution plate 11. The outer cup 122 includes a vertical section 1222 and a flared section 1223. The lower end of the vertical section 1222 abuts against the outer recessed platform 1142 of the gas distribution plate 11, and the upper end abuts against the bottom of the combustion plate 13 through the flared section 1223. At this time, the lower end of the outer cup 122 is vertically arranged, while the upper end of the outer cup 122 has a flared structure with the diameter gradually increasing from bottom to top. This makes the volume of the middle ring gas chamber 1122 gradually increase from bottom to top, which is not only conducive to increasing the fire 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 conducive to improving thermal efficiency.

[0047] refer to Figure 1-2 and Figure 5-6 Additionally, the lower end of the inner cup 121 is bent outwards and upwards to form an inner annular groove 1211. The bottom of the groove 1211 abuts against the bottom of the receiving cavity 112. In this embodiment, the bottom of the groove 1211 abuts against the inner recess 1141 of the gas distribution plate 11. This increases the contact surface between the inner cup 121 and the gas distribution plate 11, which helps to improve the stability and reliability of the inner cup 121 installation and the sealing performance between the inner cup and the gas distribution plate. Secondly, it gives the inner cup a certain temporary liquid-holding function, which can reduce the impact of the overflow on the burner assembly when the user cooks and a large amount of liquid overflows. Alternatively, the lower end of the outer cup 122 may be bent inward and upward to form a central annular groove 1221. The bottom of the central annular groove 1221 abuts against the bottom of the receiving cavity 112. In this embodiment, the bottom of the central annular groove 1221 abuts against the outer recess 1142 of the gas distribution plate 11. This increases the contact surface between the outer cup 122 and the gas distribution plate 11, which is beneficial to improving the installation stability and reliability of the outer cup 122 and the sealing performance between the outer cup 122 and the gas distribution plate. Secondly, it enables the outer cup 122 to have a certain temporary liquid holding function, which can reduce the impact of the overflow on the burner assembly when the user cooks a large amount of liquid overflows.

[0048] refer to Figure 1-3 Furthermore, the combustor assembly 1 also includes an inner gasket 141 and / or an outer gasket 142. The inner gasket 141 is disposed between the inner cup 121 and the bottom of the gas distribution plate 11 or the bottom of the combustion plate 13 to adjust the sealing between the inner cup 121 and the gas distribution plate 11 and the combustion plate 13, so as to prevent the inner and middle ring gas chambers from mixing. The outer gasket 142 is disposed between the outer cup 122 and the bottom of the gas distribution plate 11 or the bottom of the combustion plate 13 to adjust the sealing between the outer cup 122 and the gas distribution plate 11 and the combustion plate 13, so as to prevent the outer and middle ring gas chambers from mixing.

[0049] In this embodiment, the inner gasket 141 and the outer gasket 142 are heat-resistant and preferably ceramic fiber gaskets. The inner gasket 141 is sandwiched between the bottom of the inner cup 121 and the inner recessed platform 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 recessed platform 1142 of the gas distribution plate 11. This allows the inner and outer cups to be adjusted vertically so that their tops are always in close contact with the lower surface of the combustion plate 13, preventing cross-contamination of gas between the rings.

[0050] refer to Figure 1-2Furthermore, the combustion body assembly 1 also includes a heat insulation plate 15, which is disposed within the outer annular chamber 1123 and located below the combustion plate 13. A heat insulation cavity 151 is formed between the heat insulation plate 15 and the outer annular wall of the distribution plate 11 to reduce heat radiation to the outer annular wall of the distribution plate 11, thereby reducing heat loss and temperature rise of the distribution plate 11. The lower end of the heat insulation plate 15 abuts or connects to the outer edge of the outer air intake. In this embodiment, the lower end of the heat insulation plate 15 abuts or connects to the top wall of the annular boss 1143 of the distribution plate 11. A gap 152 communicating with the heat insulation cavity 151 is formed between the upper end of the heat insulation plate 15 and the upper end of the outer annular wall of the distribution plate 11, thereby facilitating the removal of sand after sandblasting of the workpiece (sandblasting is necessary to increase the adhesion of the workpiece for spraying), effectively solving the problem that sand will enter between the distribution plate 11 and the heat insulation plate 15 after sandblasting of the sample and is difficult to remove.

[0051] In this embodiment, an upward-opening outer annular groove 153 is recessed at the lower end of the heat insulation plate 15. The outer annular groove 153 is located around the outer air intake, 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 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 component 12 is a one-piece stamped structure. Specifically, the partition component 12 includes an inner cup 121, an outer cup 122, and a connecting plate 123. The inner cup 121 and the outer cup 122 are integrally formed by the connecting plate 123. A vent is provided on the connecting plate 123, and the central air inlet is connected to the central annular 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. The plurality of vent holes 1231 correspond one-to-one with and are connected to the plurality of central air inlets 1132 on the air distribution plate 11. It can be seen that by designing the partition component 12 as a one-piece stamped structure, the structure of the partition component 12 is simpler and the assembly and disassembly are easier.

[0054] In addition, the partition assembly 12 can be configured to be rotatably disposed in the receiving cavity 112. By rotating the partition assembly 12, the relative position of the venting section and the middle air inlet section can be adjusted, thereby adjusting the air inlet area formed when the venting section and the middle air inlet section are connected. This allows the partition assembly 12 to have the functions of dividing the cavity and heat insulation. By rotating the partition assembly 12, the relative position of the venting section of the connecting plate 123 and the middle air inlet section of the gas distribution plate 11 can be changed, 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 assembly 2.

[0055] In this embodiment, the connecting plate 123 includes an annular planar segment and an annular inclined segment. The annular planar segment is located outside the annular inclined segment and is higher than the annular inclined segment. The radially outer end of the annular planar segment is integrally formed with the outer cup body 122. Specifically, the radially outer end of the annular planar segment is integrally formed with the upper end of the inner groove wall of the central annular groove 1221 of the outer cup body 122. The annular inclined segment extends from the annular planar segment toward the inner cup body 121 and is inclined downward. This annular inclined segment is formed by bending the radially inner end of the annular planar segment downward, and the radially inner end of the annular inclined segment is integrally formed with the inner cup body 121. Specifically, the radially inner end of the annular inclined segment 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 segment.

[0056] Example 3

[0057] refer to Figure 11 The difference between this embodiment and embodiments 1 or 2 lies in the different cooperation relationship between the separating component 12 and the combustion plate 13. Specifically, an inner ring groove 131 with a downward opening is recessed at the bottom of the combustion plate 13 corresponding to the position of the inner cup 121. The upper end of the inner cup 121 is embedded in the inner ring groove 131, so that the inner cup can divide the combustion plate 13 into fire zones, which helps to reduce the cross-flow between the inner fire zone and the medium fire zone of the combustion plate 13, thereby effectively ensuring the low flame combustion state; and / or an outer ring groove with a downward opening is recessed at the bottom of the combustion plate 13 corresponding to the position of the outer cup 122. The upper end of the outer cup 122 is embedded in the outer ring groove, so that the outer cup can divide the combustion plate 13 into fire zones, which helps to reduce the cross-flow between the outer fire zone and the medium fire zone of the combustion plate 13, thereby effectively ensuring the medium flame combustion state.

[0058] In addition, since the upper ends of the inner cup 121 and / or the outer cup 122 are inserted into the combustion plate 13, the relative position between the separation component 12 and the gas distribution plate can be adjusted by rotating the combustion plate 13 to drive the separation component 12 to rotate.

[0059] Example 4

[0060] refer to Figure 12-14The difference between this embodiment and embodiments 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 central hole 211 with openings at both the upper and lower ends, an inner ring mixing chamber 212 with an open top, a middle ring mixing chamber 213 with an open top, and an outer ring mixing chamber 214 with an open top. 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 mixing chamber 212, the middle ejector tube 242 is connected to the middle ring mixing chamber 213, and the outer ejector tube 243 is connected to the outer ring mixing chamber. The burner assembly 1 is detachably installed on the top of the burner head assembly 2. The lower central hole 211 is connected to the upper central hole 111. The inner ring mixing chamber 212 is connected to the inner ring gas chamber 1121 through the inner air inlet. The middle ring mixing chamber 213 is connected to the middle ring gas chamber 1122 through the middle air inlet. The outer ring mixing chamber 214 is connected to the outer ring gas 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 seal the top of the inner and outer side walls of the inner ring mixing chamber 212. The third mounting surface 1153 and the fourth mounting surface 1154 of the gas distribution plate 11 are respectively used to seal the top of the inner and outer side walls of the outer ring mixing chamber 214 to ensure the airtightness of the burner assembly 1 after it is installed on the burner head assembly 2.

[0061] In this embodiment, a downward-opening recessed cavity 22 is provided in the lower end of the lower central hole 211. The recessed cavity 22 is connected to the lower central hole 211 and is located directly below the inner annular mixing chamber 212. By adopting a partially hollowed-out structure on the lower side of the furnace head assembly 2, it is convenient to discharge the waste sand core of the middle ring at high temperature during the casting of the furnace head assembly, thereby reducing gas waste. The furnace head assembly 2 is provided with a vertically arranged inner annular air inlet 231. The inner annular air inlet 231 is located between the two free ends of the annular cavity 22, and the upper end of the inner annular air inlet 231 is connected to the inner annular mixing chamber 212, and the lower end is connected to the inner ejector tube 241 of the furnace head assembly 2.

[0062] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A three-circuit infrared burner comprising a combustion body assembly (1), characterized in that, The combustion body assembly (1) comprises: a gas distribution disc (11) having an upper central hole (111) and a containing cavity (112) open at the top and located at the periphery of the upper central hole (111), and the bottom of the gas distribution disc (11) is provided with an inner air inlet portion, a middle air inlet portion and an outer air inlet portion arranged in the radial direction and spaced from each other from inside to outside; a separation assembly (12) arranged in the containing cavity (112) and separating the containing cavity (112) into an inner ring air chamber (1121), a middle ring air chamber (1122) and an outer ring air chamber (1123), the inner ring air chamber (1121) being in communication with the inner air inlet portion, the middle ring air chamber (1122) being in communication with the middle air inlet portion, and the outer ring air chamber (1123) being in communication with the outer air inlet portion; and a combustion plate (13) installed in the containing cavity (112) and located at the top of the separation assembly (12).

2. A three-cycle infrared burner as defined in claim 1, wherein The separation assembly (12) comprises an inner cup body (121) and an outer cup body (122) located at 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 ring air chamber (1121) is formed between the inner cup body (121) and the inner ring wall of the gas distribution disc (11); the outer cup body (122) is arranged between the middle air inlet portion and the outer air inlet portion, the middle ring air chamber (1122) is formed between the outer cup body (122) and the inner cup body (121), and the outer ring air chamber (1123) is formed between the outer cup body (122) and the outer ring wall of the gas distribution disc (11).

3. A three-loop 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 the form of a flared structure with the diameter gradually increasing from bottom to top.

4. A three-loop infrared burner as claimed in claim 2, characterized in that The lower end of the inner cup body (121) is outwardly and upwardly bent to form an inner annular groove (1211), and the groove bottom of the inner annular groove (1211) abuts against the bottom of the containing cavity (112); and / or the lower end of the outer cup body (122) is inwardly and upwardly bent to form a middle annular groove (1221), and the groove bottom of the middle annular groove (1221) abuts against the bottom of the containing cavity (112).

5. A three-loop infrared burner as claimed in claim 2, characterized in that An inner ring clamping groove (131) open 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 clamping groove (131); and / or an outer ring clamping groove open 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 clamping groove.

6. A three-cycle infrared burner according to any one of claims 2-5, 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 through a connecting plate (123), and an air passage is formed in the connecting plate (123), and the middle air inlet portion is in communication with the middle ring air chamber (1122) through the air passage.

7. A three-cycle infrared burner as defined in claim 6, wherein The separation assembly (12) is rotatably arranged in the accommodating cavity (112), and the relative positions of the ventilation part and the middle air inlet part are adjusted by rotating the separation assembly (12), so that the air inlet area formed when the ventilation part and the middle air inlet part are communicated is adjusted.

8. A three-cycle infrared burner according to any one of claims 2-5, 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 disc (11) or the combustion plate (13), and the outer gasket (142) is arranged between the outer cup body (122) and the bottom of the gas distribution disc (11) or the combustion plate (13).

9. A three-cycle infrared burner as defined in claim 1, wherein The combustion body assembly (1) further comprises a heat insulation plate (15), the heat insulation plate (15) is arranged in the outer ring air chamber (1123) and below the combustion plate (13), a heat insulation cavity (151) is formed between the heat insulation plate (15) and the outer ring wall of the gas distribution disc (11), the lower end of the heat insulation plate (15) abuts against or is connected with the outer edge of the outer air inlet part, and a gap (152) in communication with 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 disc (11).

10. A three-cycle infrared burner as defined in claim 9, wherein An upwardly-opened outer annular groove (153) is arranged in the lower end of the heat insulation plate (15).

11. A three-cycle infrared burner according to any one of claims 1-5 or any one of claims 9-10, characterized in that, The combustion body assembly (1) further comprises a furnace head assembly (2), the furnace head assembly (2) has a lower central hole (211), an inner ring gas mixing cavity (212), a middle ring gas mixing cavity (213) and an outer ring gas mixing cavity (214), the bottom of the combustion body assembly (1) is detachably arranged on the top of the furnace head assembly (2), the lower central hole (211) is in communication with the upper central hole (111), the inner ring gas mixing cavity (212) is in communication with the inner ring air chamber (1121) through the inner air inlet part, the middle ring gas mixing cavity (213) is in communication with the middle ring air chamber (1122) through the middle air inlet part, and the outer ring gas mixing cavity (214) is in communication with the outer ring air chamber (1123) through the outer air inlet part.

12. A three-cycle infrared burner as defined in claim 11, wherein A downwardly-opened air avoiding recessed cavity (22) is arranged in the hole wall of the lower end of the lower central hole (211), the air avoiding recessed cavity (22) is in communication with the lower central hole (211) and located directly below the inner ring gas mixing cavity (212).

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