CN213901059U - Three-ring infrared burner - Google Patents

Abstract

The utility model discloses a three ring infrared burner, including the furnace end, burning body subassembly and central through hole in the outer burning body subassembly, the furnace end is equipped with outer loop air cavity, inner ring air cavity, zhonghuan air cavity and a plurality of transverse arrangement's air passage, the top in outer loop air cavity is located to outer burning body subassembly lid, the top in inner ring air cavity and well ring air cavity is located to inner burning body subassembly lid, annular air flue is injectd jointly to the lateral wall of inner burning body subassembly at least and the inside wall of outer burning body subassembly, annular air flue intercommunication air passage, central through hole runs through furnace end and inner burning body subassembly. The utility model realizes the purpose of supplementing sufficient air for the combustion of the inner side of the outer ring fire and the middle ring fire, the secondary air supplementing effect is better, and the combustion is more sufficient; the air channel transversely arranged prevents heat generated by the work of the outer combustion body assembly from radiating to the interior of the furnace end, so that the temperature rise of the furnace end is reduced, and the heat absorbed by the air channel can preheat secondary air flowing through the air channel, so that the heat efficiency is improved.

Description

Three-ring infrared burner

Technical Field

The utility model relates to a cooking utensils technical field especially relates to an infrared burner for gathering can kitchen.

Background

The infrared stove is more and more popular with consumers due to higher thermal efficiency and lower CO emission, the three-ring infrared burner enables flame to be divided into more zones, firepower can be divided into more sections, the purpose of accurately controlling the firepower during cooking is achieved, and cooking experience is better.

Chinese patent CN110207110A discloses a "three-ring infrared burner", in which a vertical secondary air channel leading to the center of the burner is provided in the inner gas-distributing plate, the secondary air required by the middle ring and the inner ring combustion plate is provided from the bottom shell of the cooker, and the primary air required by the burner is also provided from the bottom shell. If the embedded kitchen range and the cabinet are not provided with the air inlet holes or the area of the air inlet holes is insufficient, the air in the bottom shell of the kitchen range is not enough for the normal combustion of the combustor, so that the insufficient combustion is caused.

Disclosure of Invention

The utility model discloses aim at solving one of the problems that exist among the prior correlation technique at least to a certain extent, for this reason, the utility model provides a three ring infrared burner has realized supplementing the secondary air of the capacity to the outside of the inboard of exocyclic and zhonghuan, and the air supplements the effect better, and the burning is more abundant, need not to compete with the nozzle from the cooking utensils drain pan is inside to rush for limited primary air to the air of air passage of flowing through can be preheated, and the thermal efficiency is higher.

According to the three-ring infrared burner provided by the above, the three-ring infrared burner is realized by the following technical scheme:

a three-ring infrared burner, comprising: the burner is provided with an outer ring air cavity, an inner ring air cavity and a middle ring air cavity which are opened upwards, a plurality of transversely arranged air channels are arranged on the burner at intervals, and inlets of the air channels are arranged at the upper end of the outer side wall of the burner; the outer combustion body assembly is covered above the outer ring air cavity; the inner combustion body assembly is covered above the inner ring air cavity and the middle ring air cavity, the outer side wall of the inner combustion body assembly and the inner side wall of the outer combustion body assembly at least jointly define an annular air passage with an upward opening, and the annular air passage is communicated with the outlet of the air passage; the central through hole penetrates through the furnace end and the inner combustion body assembly in sequence.

In some embodiments, the air passage crosses the outer ring air cavity and divides the outer ring air cavity into an upper part and a lower part, the outer ring air cavity is formed with an outer ring air outlet for gas to pass through at a position between two adjacent air passages, and the upper part and the lower part of the outer ring air cavity are communicated through the outer ring air outlet.

In some embodiments, the number of the air channels is four, the four air channels are uniformly spaced along the circumferential direction of the burner, the length L of the air channels along the circumferential direction is less than one eighth of the circumference of the outer ring outer wall of the outer ring air chamber, and the length L is greater than one eighth of the circumference of the outer ring inner wall of the outer ring air chamber.

In some embodiments, the inner combustion body assembly comprises an inner air distribution disc, the inner air distribution disc is arranged above the inner ring air cavity and the middle ring air cavity, the inner air distribution disc is provided with an inner air distribution cavity and an outer air distribution cavity which are arranged at intervals, the inner air distribution cavity is communicated with the inner ring air cavity, the outer air distribution cavity is communicated with the middle ring air cavity, and the outer side wall of the inner air distribution disc, the upper end of the outer ring wall of the middle ring air cavity and the inner side wall of the outer combustion body assembly jointly define the annular air passage.

In some embodiments, the outer annular wall of the middle annular chamber is circumferentially provided with an inwardly extending boss located below the outlet, and the lower end of the outer side wall of the inner air distribution plate is circumferentially provided with an outwardly extending positioning portion abutting against the top surface of the boss.

In some embodiments, the inner burner assembly further comprises an inner burner mounted within the inner gas distribution disk and covering the upper portions of the inner and outer gas distribution chambers.

In some embodiments, the outer combustion body assembly comprises an outer gas distribution disc, the outer gas distribution disc is mounted above the outer annular gas cavity and abuts against the upper end face of the outer annular wall of the middle annular gas cavity, a gap is formed between the upper end of the outer side wall of the inner gas distribution disc and the inner side wall of the outer gas distribution disc, and the gap forms the upper section of the annular gas passage.

In some embodiments, the burner is provided with a lower central hole, the inner combustion body assembly is provided with an upper central hole, the upper central hole is communicated with the lower central hole and mutually forms the central through hole, the ignition device is arranged at the central through hole, the upper end of the ignition device extends to the upper part of the central through hole, and an inner air distribution disc of the inner combustion body assembly can be reliably connected with the burner through the ignition device.

In some embodiments, the ignition device includes a bracket assembly and an ignition needle, the bracket assembly is mounted in the lower central hole and the upper central hole, the lower end of the bracket assembly is connected to the burner, the upper end of the bracket assembly abuts against the inner air distribution plate, the bracket assembly is provided with a mounting hole, the ignition needle is arranged at the mounting hole and the upper end of the ignition needle extends to the upper side of the mounting hole, and the ignition needle can rotate between a locking position and a zero position for detaching the inner combustion body assembly.

In some embodiments, the bracket assembly includes a bracket and a fixing seat having the mounting hole, the bracket is connected to the furnace end and the fixing seat respectively, an elastic portion extending towards the direction of the inner air distribution plate is provided on the bracket, the elastic portion is pressed against the lower end of the inner side wall of the upper central hole, and the elastic portion can push the fixing seat to abut against the upper end of the inner side wall of the upper central hole through the bracket.

Compared with the prior art, the utility model discloses an at least including following beneficial effect:

1. the utility model discloses an infrared burner, secondary air is provided by the air of cooking utensils panel upside via transversely arranged air passage and annular air flue in proper order, has realized supplementing the secondary air of the required capacity of burning for outer ring fire inboard and well ring fire, and secondary air supplements the effect better, guarantees to burn more fully to need not to compete from the inside of cooking utensils drain pan and nozzle for limited primary air;

2. the utility model discloses transversely arranged's air passage has prevented inside the perpendicular downward radiation of heat that outer burning body subassembly work produced to the furnace end, does benefit to the temperature rise that reduces the furnace end to the absorbed heat of air passage can preheat the secondary air of flow through air passage, does benefit to and promotes the combustion thermal efficiency.

Drawings

FIG. 1 is a schematic structural diagram of an infrared burner according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an infrared burner in an embodiment of the invention;

FIG. 3 is a schematic structural view of a burner head according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of an inner air distribution plate according to an embodiment of the present invention;

FIG. 5 is a sectional view of the burner and the inner and outer burner assemblies in an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an ignition device in an embodiment of the present invention;

fig. 7 is a partially enlarged view of a portion a in fig. 5.

Detailed Description

The present invention is illustrated by the following examples, but the present invention is not limited to these examples. To the embodiment of the present invention, modify or replace some technical features, without departing from the spirit of the present invention, it should be covered in the technical solution scope of the present invention.

Referring to fig. 1-3, the present embodiment provides a three-ring infrared burner, which comprises a burner head 1, an outer burner body assembly 2, an inner burner body assembly 3 and a central through hole, wherein the furnace end 1 is provided with an outer ring air cavity 11, an inner ring air cavity 12 and a middle ring air cavity 13 which are opened upwards, a plurality of air channels 10 which are transversely arranged are arranged on the furnace end 1 at intervals, the inlet 101 of the air channel 10 is arranged at the upper end of the outer side wall of the furnace end 1 and is positioned above the panel of the cooker, the outlet 102 is positioned on the outer ring wall of the middle ring air cavity 13 and is communicated with the middle ring air cavity 13, like this, guarantee the required secondary air of infrared burner burning, the air channel 10 that transversely sets up on the furnace end 1 by the atmosphere of cooking utensils panel upside provides, has realized supplementing the secondary air from the external environment of cooking utensils, need not to compete from limited primary air with the nozzle from the inside of cooking utensils drain pan for the air supplements the effect better. The outer burner assembly 2 is of an annular configuration and is disposed above the outer annular air chamber 11 to form an outer annular fire. The inner burner body assembly 3 is covered above the inner ring air chamber 12 and the middle ring air chamber 13 to form an inner ring fire and a middle ring fire, and the outer side wall of the inner burner body assembly 3 and at least the inner side wall of the outer burner body assembly 2 jointly define an annular air passage 4 with an upward opening, and the annular air passage 4 is communicated with the outlet 102 of the air passage 10. Referring to fig. 2, in the present embodiment, the outer side wall of the inner burner assembly 3, the upper end of the outer ring wall of the middle ring air cavity 13 and the inner side wall of the outer burner assembly 2 respectively define the annular air passage 4, so that the secondary air can flow out from the air passage 10 transversely arranged by the atmospheric pressure person on the upper side of the stove panel and then upwards flow out through the annular air passage 4, thereby realizing sufficient secondary air required by supplementary combustion of the inner side of the outer ring fire and the middle ring fire, and ensuring more sufficient combustion. A central through hole (not shown) which in turn passes through the burner 1 and the inner burner assembly 3 to facilitate the mounting of the ignition device 5.

It can be seen that, the three-ring infrared burner of this embodiment is equipped with a plurality of transversely arranged air passages 10 through the interval on furnace end 1, and the annular air flue 4 that communicates air passage 10 is injectd jointly with the inside wall of outer burner block 2 at least to the lateral wall of interior burner block 3, thereby make the secondary air provide via air passage 10 and annular air flue 4 by the atmosphere of cooking utensils panel upside, the secondary air of the required capacity of supplementary burning is realized for outer ring fire inboard and well ring fire, the secondary air supplyes the effect better, guarantee that the burning is more abundant, and need not to compete limited primary air with the nozzle from the inside of cooking utensils drain pan. In addition, the air channel 10 transversely arranged can prevent heat generated by the operation of the outer combustion body assembly 2 from vertically radiating downwards to the interior of the furnace end 1, and is favorable for reducing the temperature rise of the interior of the furnace end 1 and the interior of a bottom shell of the kitchen range. In addition, the heat absorbed by the air passage 10 can preheat the secondary air flowing through the air passage 10, so that the utilization rate of radiant heat is improved, and the combustion heat efficiency is improved.

Referring to fig. 2 to 3, specifically, the air passages 10 cross the outer ring air cavity 11 and divide the outer ring air cavity 11 into an upper portion and a lower portion, an outer ring air outlet (not shown in the figure) for gas to pass through is formed at a position between two adjacent air passages 10 of the outer ring air cavity 11, and the upper portion and the lower portion of the outer ring air cavity 11 are communicated through the outer ring air outlet. Therefore, the transversely arranged air channel 10 divides the outer ring air cavity 11 into a plurality of parts, on one hand, the effect of preventing partial heat from radiating to the lower part of the outer ring air cavity 11 is realized, the temperature rise of the bottom of the furnace end 1 and the inner part of the bottom shell of the kitchen range is favorably reduced, and the heat absorbed by the air channel 10 can preheat secondary air flowing through the air channel 10, so that the heat efficiency of combustion is higher; on the other hand, the gas flowing out from the outer ring gas outlet is effectively ensured to fill the upper part of the outer ring gas cavity 11 and then overflow to the outer burner assembly 2, so that the flow rate of the gas flowing to each position of the outer burner 22 of the outer burner assembly 2 is ensured to be basically equal, and the combustion uniformity of the outer ring fire is improved.

Preferably, the quantity of air passageway 10 is four, and four air passageway 10 are along the even interval arrangement of the circumferential direction of furnace end 1, and the length L of air passageway 10 along the circumferential direction is less than the eighth week of outer loop outer wall 111 of outer loop air cavity 11, and length L is greater than the eighth week of outer loop inner wall 112 of outer loop air cavity 11, like this, guarantees that air passageway 10 can not influence the effect of giving vent to anger of outer loop air cavity 11, compares in the present scheme that supplements the secondary air through the central through-hole of infrared burner, the utility model discloses transversely arranged air passageway 10, its sectional area is bigger, under four air passageway 10's cooperation, further improves the required secondary air volume in the well ring fire outside and the outer ring fire inboard of infrared burner to can also satisfy the required secondary air volume of inner ring fire full-minute burning.

In this embodiment, the outer ring inner wall 112 of the outer ring air cavity 11 forms the outer ring wall of the middle ring air cavity 13, and the inner ring outer wall 121 of the inner ring air cavity 12 forms the inner ring wall of the middle ring air cavity 13, so as to ensure that the infrared burner has three ring fires, namely, an outer ring fire, a middle ring fire and an inner ring fire, so that the stove has more segmental firepower, and the purpose of accurately controlling firepower during cooking can be achieved, and meanwhile, the structure of the burner 1 is more compact, the manufacturing materials are lower, and the cost is lower. In addition, the outer ring inner wall 112 is higher than the inner ring outer wall 121 and the inner ring inner wall 122 of the inner ring air chamber 12, and the upper end surface of the inner ring outer wall 121 is flush with the upper end surface of the inner ring inner wall 122.

Further, the burner 1 is provided with a lower center hole 14 for facilitating the installation of the ignition device 5, an upper end surface of the lower center hole 14 is lower than an upper end surface of the inner ring outer wall 121 of the inner ring air chamber 12, and a peripheral wall of the lower center hole 14 constitutes an inner ring inner wall 122 of the inner ring air chamber 12. In addition, a boss 131 extending toward the lower center hole 14 is provided in the inner ring outer wall 121 of the inner ring air chamber 12, and the boss 131 is used for supporting the inner burner body assembly 3 to limit and position the installation position of the inner burner body assembly 3.

Referring to fig. 2 to 3, in particular, the outer burner assembly 2 includes an outer distributor 21 and an outer burner 22, the outer distributor 21 is disposed above the outer annular air chamber 11 and abuts against the upper end surface of the outer annular wall of the middle annular air chamber 13, and a gap (not shown) is formed between the upper end of the outer sidewall of the inner burner assembly 3 and the inner sidewall of the outer distributor 21, and the gap forms the upper section of the annular air duct 4, so that an annular air duct 4 for supplementing secondary air is ensured between the outer annular fire and the middle annular fire, and the secondary air flowing out from the annular air duct 4 supplements sufficient air to the inner sides of the middle annular fire and the outer burner 22, thereby ensuring more sufficient combustion of the inner sides of the inner burner assembly 3 and the outer burner 22 and further improving the thermal efficiency.

Referring to fig. 2 to 4, specifically, the inner burner assembly 3 includes an inner gas distribution plate 31 and an inner burner 32, the inner gas distribution plate 31 is installed above the inner ring air chamber 12 and the middle ring air chamber 13, the inner gas distribution plate 31 has an inner gas distribution chamber 301 and an outer gas distribution chamber 302 which are arranged at intervals, the inner gas distribution chamber 301 is communicated with the inner ring air chamber 12, the outer gas distribution chamber 302 is communicated with the middle ring air chamber 13, and the outer sidewall of the inner gas distribution plate 31 defines the annular gas duct 4 together with the upper end of the outer ring wall of the middle ring air chamber 13 and the inner sidewall of the outer gas distribution plate 21, respectively. The inner burner body 32 is installed in the inner branch air chamber 31 and covers the upper sides of the inner branch air chamber 301 and the outer branch air chamber 302. Thus, the inner burner body 32 has the middle ring fire region and the inner ring fire region, so that the fire power of the infrared burner is more finely controlled, the secondary air flowing out upward from the annular air passage 4 is ensured, sufficient air can be supplemented to the inner side of the outer ring fire and the middle ring fire, and the combustion sufficiency of the outer ring fire and the middle ring fire is further improved. In addition, because the area of the inner combustion body 32 is small, the inner ring fire is close to the middle ring fire, so that the secondary air flowing out upwards from the annular air passage 4 can supplement sufficient secondary air to the inner ring fire, and the combustion of the inner ring fire is more sufficient.

In this embodiment, the inner getter plate 31 includes an outer ring 3101, a middle ring 3102, an inner ring 3103 and a connecting block 3104, the diameter of the outer ring 3101 > the diameter of the middle ring 3102 > the diameter of the inner ring 3103, the outer ring 3101, the middle ring 3102 and the inner ring 3103 are coaxially arranged, and the outer ring 3101, the middle ring 3102 and the inner ring 3103 are connected by a plurality of connecting blocks 3104, that is, the middle ring 3102 is provided with a connecting hole (not shown) for the connecting block 3104 to pass through, and the connecting block 3104 is arranged after passing through the connecting hole and has two ends fixedly connected to the inner wall of the outer ring 3101 and the outer wall of the inner ring 3103, respectively, so that the connecting block 3104 realizes stable and reliable connection between the outer ring 3101, the middle ring 3102 and the inner ring 3103.

In addition, the inner ring 3103 has an upper central hole 312 corresponding to the lower central hole 14 of the burner 1. The middle ring 3102 and the inner ring 3103 together define an inner gas-distributing chamber 301, and the outer ring 3101 and the middle ring 3102 together define an outer gas-distributing chamber 302. A positioning portion 311 extending outward is circumferentially provided at the lower end of the outer sidewall of the inner gas distribution plate 31 (i.e., the lower end of the outer sidewall of the outer ring 3101).

Referring to fig. 2 and 4, when the inner air distribution disk 31 is installed above the inner ring air cavity 12 and the middle ring air cavity 13, the bottom surface of the connecting block 3104 abuts against the upper end surface of the inner ring outer wall 121 and the upper end surface of the inner ring inner wall 122, at this time, the lower end of the inner ring 3103 is inserted into the lower central hole 1, so that the upper central hole 312 of the inner ring 3103 communicates with the lower central hole 14 and forms the central through hole of the infrared burner, and the outer wall of the inner ring 3103 abuts against the inner side wall of the lower central hole 1, so as to prevent the gas of the inner ring air cavity 12 from flowing into the central through hole from the matching position of the inner ring 3103 and the lower central hole 1. The lower end of the middle ring 3102 is inserted into the inner ring air chamber 12 and abuts against the inner ring outer wall 121 of the inner ring air chamber 12. The lower end of the outer circular ring 3101 is inserted into the middle circular air cavity 13, and the positioning part 311 on the outer side wall of the middle circular air cavity 13 abuts against the top surface of the boss 131, so that the inner air distribution disk 31 is stably and reliably mounted above the inner circular air cavity 12 and the middle circular air cavity 13, and the mounting stability of the inner air distribution disk 31 is improved.

Specifically, support tables 313 extending outwards are formed on the inner wall of the outer ring 3101 and the outer wall of the inner ring 3103, the inner combustion body 32 is installed in the inner air distribution plate 31, the inner side and the outer side of the inner combustion body 32 are respectively abutted against the support tables 313, and at this time, the inner combustion body 32 just covers the outlets of the inner air distribution chamber 301 and the outer air distribution chamber 302. In addition, in order to further secure the installation stability of the inner combustion body 32, the inner combustion body 32 may be fastened and connected to the inner side or the outer side of the inner air distribution plate 31 by using screws.

Referring to fig. 5-7, further, the infrared burner induction loop further comprises an ignition device 5, the ignition device 5 is arranged at the lower central hole 14 and the upper central hole 312, the upper end of the ignition device 5 extends to the upper side of the upper central hole 312, and the inner gas distribution plate 31 can be reliably connected with the burner head 1 through the ignition device 5, so that the inner gas distribution plate 31 is indirectly and reliably connected with the burner head 1, the connection reliability between the burner head 1 and the inner gas distribution plate 31 is further improved, the inner burner assembly 3 and the burner head 1 are ensured to be in a conduction state, and the reliability of the infrared burner induction loop is further ensured.

Specifically, the ignition device 5 includes a bracket assembly 51 and an ignition needle 52, the bracket assembly 51 is installed in the lower central hole 14 and the upper central hole 312, the lower end of the bracket assembly 51 is connected to the burner 1, and the upper end of the bracket assembly 51 abuts against the inner gas distribution plate 31, so that the bracket assembly 51 realizes reliable connection between the burner 1 and the inner gas distribution plate 31, and ensures that the inner combustion body assembly 3 is in a conduction state with the burner 1.

In addition, a mounting hole (not shown in the figure) is arranged on the bracket assembly 51, the ignition needle 52 is arranged at the mounting hole, the upper end of the ignition needle 52 protrudes above the mounting hole, the ignition needle 52 can rotate between a locking position and a zero position for detaching the inner combustion body assembly 3, and the ignition needle 52 is electrically connected with a stove controller arranged in a stove bottom shell through a lead. When the ignition needle 52 is rotated to the zero position, the inner burner assembly 3 can be detached from the burner 1, which is convenient for the user to clean, and is re-installed in the burner 1 after the cleaning; when the ignition needle 52 rotates to the locking position, the inner combustion body assembly 3 cannot be detached, the ignition needle 52 is positioned on the support assembly 51, the ignition needle 52 is ensured to be stably and reliably installed, the infrared combustor can be normally used at the moment, and the ignition needle 52, the stove controller, the stove bottom shell, the stove head 1 and the inner combustion body assembly 3 form an induction loop.

Specifically, the bracket assembly 51 includes a bracket 511 and a fixing base 512 having a mounting hole, the bracket 511 is respectively connected to the burner 1 and the fixing base 512, an elastic portion 501 extending toward the inner air distribution plate 31 is disposed on the bracket 511, the elastic portion 501 is tightly pressed against the lower end of the inner side wall of the upper central hole 312, and the elastic portion 501 can push the fixing base 512 to abut against the upper end of the inner side wall of the upper central hole 312 through the bracket 511. In this way, the bracket 511 and the elastic part 501 arranged on the bracket 511 are used for clamping the bracket 511 and the elastic part 501 on two opposite inner side walls of the upper central hole 312, so that the burner 1 and the inner air distribution plate 31 are indirectly connected reliably, the connection and the abutment between the burner 1 and the inner air distribution plate 31 are further enhanced, and the induction loop is ensured to be more reliable. Preferably, the fixing base 51 and the bracket 511 are both metal pieces capable of conducting electricity to ensure the conducting effect.

Preferably, support 511 is "L" or "Z" font, and the bottom surface of support 511 passes through screw fastening and connects in furnace end 1 bottom, and the top surface is reliably connected with fixing base 512, and elastic component 501 is the flexure strip, and the one end integrated into one piece of this flexure strip sets up on the vertical face of support 511, and the other end orientation deviates from ignition needle 52 direction and extends, not only guarantees that elastic component 501 and support 511's connection is reliable and stable, still makes things convenient for the quick machine-shaping of elastic component 501, has improved the utilization ratio of the vertical face of support 511.

Referring to fig. 7, when one end of the elastic piece away from the bracket 511 abuts against the lower end of the inner side wall of the upper central hole 312 of the inner air distribution plate 31, the elastic piece can push the fixing base 512 to move towards the direction opposite to the elastic piece through the bracket 511, so that the fixing base 512 tightly abuts against the upper end of the inner side wall of the upper central hole 312, and further the fixing base 512 is clamped between the bracket 511 and the inner side wall of the upper central hole 312 of the inner air distribution plate 31, thereby further ensuring the connection reliability between the fixing base 512 and the inner air distribution plate 31.

Referring to fig. 6-7, more specifically, the ignition device 5 further includes a spring 53 and a snap ring 54, the snap ring 54 is clamped on the outer surface of the ignition needle 52 and is located below the fixing seat 512, the spring 53 is sleeved on the outer surface of the ignition needle 52, and the upper end and the lower end of the spring 53 respectively abut against the fixing seat 512 and the snap ring 54.

What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims (10)

1. A three-ring infrared burner, comprising:

the burner comprises a burner (1), wherein the burner (1) is provided with an outer ring air cavity (11), an inner ring air cavity (12) and a middle ring air cavity (13) which are opened upwards, a plurality of transversely arranged air channels (10) are arranged on the burner (1) at intervals, and inlets (101) of the air channels (10) are arranged at the upper end of the outer side wall of the burner (1);

the outer burner assembly (2), the said outer burner assembly (2) is covered and located above the said outer ring air cavity (11);

the inner combustion body assembly (3) is covered above the inner ring air cavity (12) and the middle ring air cavity (13), the outer side wall of the inner combustion body assembly (3) and the inner side wall of the outer combustion body assembly (2) at least jointly define an annular air passage (4) with an upward opening, and the annular air passage (4) is communicated with an outlet (102) of the air channel (10);

the central through hole penetrates through the furnace end (1) and the inner combustion body assembly (3) in sequence.

2. A three-ring infrared burner according to claim 1, characterized in that the air passages (10) cross the outer ring air cavity (11) and divide the outer ring air cavity (11) into an upper part and a lower part, the outer ring air cavity (11) is formed with an outer ring air outlet for gas to pass through at a position between two adjacent air passages (10), and the upper part and the lower part of the outer ring air cavity (11) are communicated through the outer ring air outlet.

3. A three-ring infrared burner according to claim 1 or 2, characterized in that the number of the air channels (10) is four, four of the air channels (10) are evenly spaced along the circumferential direction of the burner head (1), the length L of the air channels (10) along the circumferential direction is less than one eighth of the circumference of the outer ring outer wall (111) of the outer ring air chamber (11), and the length L is greater than one eighth of the circumference of the outer ring inner wall (112) of the outer ring air chamber (11).

4. The three-ring infrared burner as claimed in claim 1, wherein the inner burner body assembly (3) comprises an inner gas distribution disk (31), the inner gas distribution disk (31) is installed above the inner ring gas cavity (12) and the middle ring gas cavity (13), and the inner gas distribution disk (31) is provided with an inner gas distribution cavity (301) and an outer gas distribution cavity (302) which are arranged at intervals, the inner gas distribution cavity (301) is communicated with the inner ring gas cavity (12), the outer gas distribution cavity (302) is communicated with the middle ring gas cavity (13), and the outer side wall of the inner gas distribution disk (31) and the upper end of the outer ring wall of the middle ring gas cavity (13) and the inner side wall of the outer burner body assembly (2) jointly define the annular gas passage (4).

5. The three-ring infrared burner as claimed in claim 4, wherein the outer ring wall of the middle ring air chamber (13) is circumferentially provided with an inwardly extending boss (131), the boss (131) is located below the outlet (102), the lower end of the outer side wall of the inner air distribution plate (31) is circumferentially provided with an outwardly extending positioning portion (311), and the positioning portion (311) abuts against the top surface of the boss (131).

6. A three-ring infrared burner according to claim 4 or 5, characterized in that the inner burner body assembly (3) further comprises an inner burner body (32), the inner burner body (32) being mounted in the inner gas distribution disk (31) and covering the upper side of the inner gas distribution chamber (301) and the outer gas distribution chamber (302).

7. The three-ring infrared burner as claimed in claim 4, wherein the outer burner body assembly (2) comprises an outer gas distribution plate (21), the outer gas distribution plate (21) is installed above the outer ring air cavity (11) and abuts against the upper end surface of the outer ring wall of the middle ring air cavity (13), a gap is formed between the upper end of the outer side wall of the inner gas distribution plate (31) and the inner side wall of the outer gas distribution plate (21), and the gap forms the upper section of the annular air passage (4).

8. A tricyclic infrared burner according to claim 1, characterized by further comprising an ignition device (5), said burner (1) being provided with a lower central hole (14), said inner burner body assembly (3) being provided with an upper central hole (312), said upper central hole (312) communicating with said lower central hole (14) and mutually constituting said central through hole, said ignition device (5) being provided at said central through hole and its upper end extending above said central through hole, an inner gas disk (31) of said inner burner body assembly (3) being capable of being securely connected with said burner (1) through said ignition device (5).

9. A three-ring infrared burner according to claim 8, characterized in that the ignition device (5) comprises a bracket assembly (51) and an ignition needle (52), the bracket assembly (51) is mounted in the lower central hole (14) and the upper central hole (312), the lower end of the bracket assembly (51) is connected to the burner (1), the upper end is abutted against the inner gas disk (31), a mounting hole is provided on the bracket assembly (51), the ignition needle (52) is provided at the mounting hole and the upper end thereof extends above the mounting hole, and the ignition needle (52) can rotate between a locking position and a zero position for detaching the inner burner assembly (3).

10. The three-ring infrared burner according to claim 9, wherein the bracket assembly (51) comprises a bracket (511) and a fixing seat (512) having the mounting hole, the bracket (511) is respectively connected with the burner (1) and the fixing seat (512), an elastic part (501) extending towards the direction of the inner air intake disc (31) is arranged on the bracket (511), the elastic part (501) is tightly pressed on the lower end of the inner side wall of the upper central hole (312), and the elastic part (501) can push the fixing seat (512) to abut against the upper end of the inner side wall of the upper central hole (312) through the bracket (511).

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