CN218455222U - Upper air inlet burner - Google Patents

Abstract

The utility model discloses an upper air inlet burner, include: the fire divider is provided with a central air cavity, an outer ring air cavity and an inner ring cavity, the bottom or the inner ring wall of the outer ring air cavity is provided with two air inlets which are adjacently arranged, an upper partition part positioned between the two air inlets is arranged in the outer ring air cavity, and the bottom of the inner ring cavity is provided with a secondary air channel for air to pass through; the two outer ejection pipes are arranged at the bottom of the distributor in the same direction and are respectively communicated with the two air inlets, and the inner ejection pipe is arranged between the two outer ejection pipes and is communicated with the central air cavity; the fire cover assembly comprises an outer fire cover and an inner fire cover, the outer fire cover is arranged at the top opening of the outer ring air cavity, and the inner fire cover is arranged at the top opening of the central air cavity. The utility model discloses an go up air inlet burner, when increasing the thermal efficiency and heat load, it is lower with manufacturing cost to ensure that the diameter of combustor is less.

Description

Upper air inlet burner

Technical Field

The utility model relates to a cooking utensils technical field especially relates to an upper air inlet burner.

Background

The upper air inlet burner is more and more widely applied to relevant products such as a gas stove, an integrated cooker, an integrated cooking center and the like, however, the heat load is often smaller than that of the lower air inlet burner due to the limitation of the structure of the burner. If the upper air inlet burner is required to carry a large heat load, the diameter of the burner needs to be increased, so that the cost is high and the thermal efficiency is low.

Disclosure of Invention

The utility model discloses aim at solving one of the problems that exist among the prior art to a certain extent at least, for this reason, the utility model provides an go up air inlet burner, when increasing the thermal efficiency and heat load, the diameter of ensureing the combustor is less and manufacturing cost is lower.

According to the upper air inlet burner, the technical scheme is that:

an upper intake air burner comprising: the fire divider is provided with a central air cavity, an outer ring air cavity and an inner ring cavity, the bottom or the inner ring wall of the outer ring air cavity is provided with two air inlets which are adjacently arranged, an upper partition part positioned between the two air inlets is arranged in the outer ring air cavity, and the bottom of the inner ring cavity is provided with a secondary air channel for air to pass through; the two outer injection pipes are arranged at the bottom of the distributor in the same direction and are respectively communicated with the two air inlets, and the inner injection pipe is arranged between the two outer injection pipes and is communicated with the central air cavity; the fire cover assembly comprises an outer fire cover and an inner fire cover, the outer fire cover is arranged at the top opening of the outer ring air cavity, and the inner fire cover is arranged at the top opening of the center air cavity.

In some embodiments, the two air inlets are opened in the inner annular wall and are arranged close to the upper partition portion, the two outer injection pipes are horizontally arranged in the same direction, and each outer injection pipe is fixedly connected to the bottom of the inner annular cavity and the inner annular wall respectively.

In some embodiments, a lower partition part extending downwards is fixedly arranged at the bottom of the fire distributor and is positioned between the inlet air inlet front sides of the two outer ejector pipes.

In some embodiments, the inner injection pipe includes a vertical section, the vertical section vertically penetrates through the bottom center of the central air cavity, the upper end of the vertical section is communicated with the central air cavity or the inner air mixing chamber of the inner fire cover, and the lower end of the vertical section is located between the two outer injection pipes and is fixedly connected with at least one of the outer injection pipes.

In some embodiments, the bottom surface of the outer ring air cavity comprises an upper plane section and two lower flow guide surfaces, each lower flow guide surface is an inclined surface or an arc surface with one high side and the other low side, the lower side of each lower flow guide surface is connected with the upper partition part, and the high side is connected with the upper plane section; the two air inlets are respectively arranged close to the lower sides of the two lower flow guide surfaces.

In some embodiments, two air inlets are respectively provided with a flow guide plate above the air outlet direction, one end of each flow guide plate close to the upper partition part is respectively connected or abutted to the upper end of the upper partition part or two opposite sides of the top of the upper partition part, or one end of each flow guide plate close to the upper partition part is connected and abutted to the top of the upper partition part, and a gap for gas to pass through is reserved between the inner annular wall and the radial inner side of each flow guide plate.

In some embodiments, a radially outer side of the baffle is integrally formed with an outer annular wall of the outer annular air cavity; or two supporting parts positioned on two opposite outer sides of the upper partition part are arranged in the outer ring air cavity, the radial outer side of the guide plate is abutted against the outer ring wall of the outer ring air cavity, and one end of the guide plate, far away from the upper partition part, is abutted against or connected with the supporting parts.

In some embodiments, an upper flow guide surface is arranged on the bottom surface of the flow guide plate, and the upper flow guide surface is an inclined surface or an arc-shaped surface which is lower at one side and higher at the other side of the upper separation part; and/or a plurality of through holes for gas to pass through are arranged on the guide plate.

In some embodiments, the secondary air injection device further comprises a base arranged below the fire distributor and the injection pipe assembly, the base is provided with an outer annular air passage and an inner annular air passage, the outer annular air passage is respectively communicated with the inlets of the two outer injection pipes, the inner annular air passage is communicated with the inlet of the inner injection pipe, an air supply interval is formed between the base and the fire distributor, and the interval is communicated with the secondary air passage.

In some embodiments, the outer annular air duct includes an outer annular air inlet seat and two outer annular air outlet seats which are arranged in the same direction and vertically, the two outer annular air outlet seats are fixedly arranged on the same side of the top of the base and are respectively communicated with inlets of the two outer injection pipes, and the outer annular air inlet seat is fixedly arranged at the bottom of the base and is respectively communicated with the two outer annular air outlet seats; the inner ring air flue comprises an inner ring air inlet pipe and an inner ring air outlet seat, the inner ring air outlet seat is vertically and fixedly arranged at the central position of the base or one side of the base top, far away from the outer ring air outlet seat, the inner ring air inlet pipe is transversely and fixedly arranged at the bottom of the base, and the inner ring air inlet pipe is communicated with the inlet of the inner injection pipe through the inner ring air outlet seat.

In some embodiments, at least one locating structure is provided between the base top and the distributor, and/or a locating structure is provided between the outer annular duct top and the distributor.

In some embodiments, the positioning structure includes a protrusion and a positioning groove that are engaged with each other, the protrusion extending upward is fixedly disposed on the top of the base and/or the top of the outer annular air outlet seat of the outer annular air passage, and the positioning groove with a downward opening is disposed at a position corresponding to the protrusion on the bottom of the distributor; or the top of the base and/or the top of the outer ring air outlet seat of the outer ring air flue is provided with the positioning groove which is opened upwards, and the position of the bottom of the distributor, which corresponds to the positioning groove, is provided with the protrusion part which extends downwards.

In some embodiments, the ignition device further comprises an ignition assembly, a mounting hole for the ignition assembly to pass through is formed in the bottom of the inner ring cavity, a fixing seat is arranged at a position, corresponding to the mounting hole, of the base, the ignition assembly vertically penetrates through the mounting hole, the lower end of the ignition assembly is connected with the fixing seat, and the upper end of the ignition assembly extends to the position above the inner ring cavity.

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

1. the utility model discloses an upper air inlet burner, through set up two air inlets of adjacent arrangement in the bottom of outer ring air cavity or inner ring wall, two outer ejector pipes syntropy set up in distributor bottom and communicate two air inlets respectively, the central air cavity of distributor is through setting up the inner ejector pipe between two outer ejector pipes, under the condition that the diameter of guaranteeing the combustor is less and the manufacturing cost is lower, increase the unit area of admitting air of outer ring air cavity, improve the heat load of combustor;

2. the bottom of the inner annular cavity is provided with the secondary air channel for air to pass through, the secondary air channel is preferably an arc-shaped air vent, the arc-shaped air vent is arranged along the circumferential direction of the inner annular cavity and is arranged between the central cavity and the upper partition part, so that secondary air required by combustion is provided for the combustor, the unit ventilation area of the secondary air is enlarged, the combustion is more sufficient, the combustion heat efficiency is improved, the CO content in smoke is reduced, and in addition, the primary air injection of the two outer injection pipes cannot be interfered when the arc-shaped air vent is used for supplementing secondary air to the combustor;

3. through with two outer injection pipe horizontal syntropys settings, every draws the bottom and the interior rampart of injection pipe difference fixed connection inner ring chamber outward, realizes drawing the radial inboard of injection pipe arrangement inner ring wall including two outward, compares in drawing the pipe horizontal fixation in outer loop air cavity bottom with two outward, can make distributor and draw the vertical thickness of the union coupling as an organic whole of penetrating more thin outward, reduces the occupation space of vertical direction.

Drawings

FIG. 1 is an exploded view of a burner according to embodiment 1 of the present invention;

FIG. 2 is a schematic view of a burner according to embodiment 1 of the present invention;

fig. 3 is a sectional view of a burner according to embodiment 1 of the present invention;

fig. 4 is a schematic structural view of the fire extinguisher and the deflector in embodiment 1 of the present invention;

fig. 5 is a first schematic structural diagram of the fire extinguisher in embodiment 1 of the present invention;

fig. 6 is a schematic structural view of the fire extinguisher in embodiment 1 of the present invention;

fig. 7 is a schematic structural view of another fire divider according to embodiment 1 of the present invention;

fig. 8 is a first cross-sectional view of the fire extinguisher according to embodiment 1 of the present invention;

fig. 9 is a first cross-sectional view of another fire divider according to embodiment 1 of the present invention;

fig. 10 is a second sectional view of the fire extinguisher according to embodiment 1 of the present invention;

fig. 11 is a second sectional view of another fire divider according to embodiment 1 of the present invention;

fig. 12 is a schematic structural view of the fire divider and another deflector in embodiment 1 of the present invention;

fig. 13 is a first schematic structural diagram of a base in embodiment 1 of the present invention;

fig. 14 is a second schematic structural view of the base in embodiment 1 of the present invention;

fig. 15 is a schematic structural view of another base in embodiment 1 of the present invention;

fig. 16 is a schematic structural view of another fire distributor according to embodiment 1 of the present invention;

fig. 17 is a schematic structural view of the fire extinguisher according to embodiment 2 of the present invention;

fig. 18 is a schematic structural view of another fire distributor according to embodiment 2 of the present invention;

fig. 19 is a sectional view of another fire divider according to embodiment 2 of the present invention.

In the figure: 1-distributor, 11-central air cavity, 12-outer ring air cavity, 1201-inner ring wall, 1202-outer ring wall, 121-air inlet, 122-upper partition, 123-upper plane section, 124-lower guide plane, 125-lower plane section, 13-inner ring cavity, 131-secondary air channel, 132-mounting port, 14-lower partition, 15-gap, 16-support part and 17-groove; 21-an inner injection pipe, 211-a vertical section, 212-a transverse section, 22-an outer injection pipe, 221-an air suction contraction section, 222-a straight pipe section and 223-a diffusion section; 31-outer fire cover, 311-outer air mixing chamber, 312-outer fire hole, 313-cutting groove, 314-decoration part, 32-inner fire cover, 321-inner air mixing chamber and 322-inner fire hole; 4-guide plate, 41-through hole; 5-base, 51-spacing, 521-outer ring air inlet base, 522-outer ring air outlet base, 523-outer ring nozzle, 531-inner ring air inlet pipe, 532-inner ring air outlet base, 533-inner ring nozzle, 54-fixing base, 541-assembling hole and 55-supporting leg; 61-convex part, 62-positioning groove; 7-an ignition assembly.

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.

Example 1

Referring to fig. 1 to 6, the present embodiment provides an upper air inlet burner, which includes a distributor 1, an ejector tube assembly (not shown in the drawings), and a fire cover assembly (not shown in the drawings), wherein the distributor 1 is provided with a central air cavity 11, an outer annular air cavity 12, and an inner annular cavity 13 located between the central air cavity 11 and the outer annular air cavity 12, and the central air cavity 11 is disposed at the central position of the distributor 1. Two air inlets 121 which are adjacently arranged are formed in the bottom or the inner annular wall 1201 of the outer annular air cavity 12 to increase the unit air inlet area of the outer annular air cavity 12, and the improvement of the heat efficiency and the heat load of the outer annular fire of the burner is realized under the condition of ensuring that the diameter of the burner is smaller. Optionally, an upper partition portion 122 located between the two air inlets 121 is disposed in the outer annular air cavity 12, the bottom of the upper partition portion 122 is fixedly connected to the bottom surface of the outer annular air cavity 12, and opposite ends of the upper partition portion 122 in the radial direction are fixedly connected to the inner annular wall 1201 and the outer annular wall 1202 of the outer annular air cavity 12, respectively, and the mixed air flowing out from the two air inlets 121 is separated by the upper partition portion 122, so that the mixed air flowing out from the two air inlets 121 is ensured not to interfere with each other.

Set up the secondary air passageway 131 that supplies the air to pass through in the bottom of inner ring chamber 13, secondary air passageway 131 is preferably the arc blow vent, the arc blow vent is arranged and is set up between center chamber and last partition 122 along the circumferential direction of inner ring chamber 13, when realizing providing the required secondary air of burning for the radial outside of the interior fire lid 32 of combustor and the radial inboard of outer fire lid 31, increase secondary air unit ventilation area, it is more abundant to make the burning, improves the thermal efficiency of burning, CO content in the reduction flue gas.

The ejector tube assembly comprises an inner ejector tube 21 and two outer ejector tubes 22, the two outer ejector tubes 22 are arranged in the same direction and are respectively communicated with the two air inlets 121, and the inner ejector tube 21 is arranged between the two outer ejector tubes 22 and is communicated with the central air cavity 11. The fire lid assembly includes an outer fire lid 31 and an inner fire lid 32, the outer fire lid 31 covers the top opening of the outer ring air chamber 12, and an outer air mixing chamber 311 of the outer fire lid 31 communicates with the outer ring air chamber 12. The inner fire cover 32 covers the top opening of the central air chamber 11, and the inner air mixing chamber 321 of the inner fire cover 32 communicates with the central air chamber 11.

It can be seen that, this embodiment has offered two air inlets 121 of adjacent arrangement through bottom or the interior rampart 1201 at outer ring air cavity 12, and two are drawn outward to penetrate the pipe 22 syntropy and set up in distributor 1 bottom and communicate two air inlets 121 respectively, and the center air cavity 11 of distributor 1 is through setting up two interior injection pipes 21 that draw between the pipe 22 outward, is guaranteeing that the diameter of combustor is less and under the lower condition of manufacturing cost, and the unit area of admitting air of increase outer ring air cavity 12 improves the heat load of combustor. In addition, the arc-shaped air vent is arranged between the central cavity and the upper partition part 122, so that the arc-shaped air vent is far away from the air inlet end of the outer injection pipe, secondary air is supplemented to the combustor through the arc-shaped air vent, and primary air injection of the two outer injection pipes 22 cannot be interfered.

Referring to fig. 4 to 5, the bottom surface of the outer annular air cavity 12 includes an upper planar section 123 and two lower flow guide surfaces 124, each of the lower flow guide surfaces 124 is an inclined surface or an arc surface having a high side and a low side, and the low side of each of the lower flow guide surfaces 124 is connected to the upper partition 122 and the high side is connected to the upper planar section 123. The two air inlets 121 are respectively arranged at the lower side of the two lower flow guide surfaces 124, or the two air inlets 121 are respectively arranged at the positions of the inner annular wall 1201 close to the lower side of the two lower flow guide surfaces 124, so as to ensure that the two air inlets 121 are respectively arranged close to the lower side of the two lower flow guide surfaces 124. Therefore, through the lower flow guide surface 124, after the mixed gas of the gas and the air flows out from the two air inlets 121, the mixed gas can move upwards along the lower flow guide surface 124 in a smooth manner to flow to the upper plane section 123, so that the outer ring air cavity 12 is filled with the mixed gas quickly, and in the process, the mixed gas is more uniformly mixed with the gas and the air, and the combustion is more sufficient; secondly, the mixed gas moves upwards along the lower flow guide surface 124 to flow towards the outer fire cover 31, which is beneficial to improving the gas outlet efficiency of the outer fire cover 31.

In this embodiment, the bottom surface of the outer annular air cavity 12 further includes a lower planar section 125 lower than the upper planar section 123, the lower sides of the two lower flow guide surfaces 124 are connected by the lower planar section 125, the upper partition portion 122 is fixedly disposed at the top of the lower planar section and extends upward, and the radial inner side and the radial outer side of the upper partition portion 122 are fixedly connected to the inner annular wall 1201 and the outer annular wall 1202, respectively. In other embodiments, the lower planar segment 125 may be omitted.

Referring to fig. 4-6, the secondary air channel 131 is an arc-shaped air vent, the length of the arc-shaped air vent in the circumferential direction is greater than one half of the circumference of the bottom of the inner annular cavity 13, and is less than three fourths or four fifths of the circumference, and the secondary air channel has a larger unit area of secondary air. In addition, the bottom of the inner ring cavity 13 is provided with a mounting port 132 for the ignition assembly 7 to pass through, and the mounting port 132 is arranged between the air outlet ends of the two outer injection pipes 22 and communicated with the arc-shaped air vent. Of course, the mounting port 132 may be disposed between the air outlet ends of the two outer injection pipes 22 and does not communicate with the arc-shaped air vent; alternatively, referring to fig. 7, the mounting port 132 is designed between the air inlet ends of the two outer ejector tubes 22 and does not communicate with the arcuate vent.

In this embodiment, interior injection pipe 21 and two outer injection pipes 22 adopt casting technology integrated into one piece with distributor 1 to make distributor 1 with draw the injection pipe subassembly to be connected as an organic whole, the rapid machining shaping of being convenient for guarantees simultaneously to draw the gas tightness of the junction of injection pipe and distributor 1. Referring to fig. 5-6, two air inlets 121 are provided in the inner annular wall 1201 and are arranged close to the upper partition 122, two outer injection pipes 22 are horizontally arranged in the same direction, and each outer injection pipe 22 is respectively and fixedly connected to the bottom of the inner annular cavity 13 and the inner annular wall 1201, so that the two outer injection pipes 22 are arranged on the radial inner side of the inner annular wall 1201, compared with the case that the two outer injection pipes 22 are transversely fixed at the bottom of the outer annular air cavity 12, in this embodiment, each outer injection pipe 22 is transversely fixed at the bottom of the inner annular cavity 13 and is located on the radial inner side of the inner annular wall 1201, so that the vertical thickness of the fire distributor 1 and the outer injection pipes 22 after being connected into a whole is thinner, and the occupied space in the vertical direction is reduced.

Because two outer ejector tubes 22 level syntropy settings, the distance between the two is less, takes place mutual interference easily when drawing the primary air. In order to make the primary air of the two outer injection pipes 22 not interfere with each other and improve the primary air injection amount of each injection pipe 22, referring to fig. 7, a lower partition part 14 extending downwards is fixedly arranged at the bottom of the distributor 1, the lower partition part 14 is positioned between the inlet air inlet front sides of the two outer injection pipes 22, and the lower partition part 14 and the distributor 1 are integrally cast and formed, so that the lower partition part 14 plays a role of separating the primary air of the two outer injection pipes, and the primary air of the two outer injection pipes does not interfere with each other.

Optionally, each outer injection pipe 22 is a straight pipe or a throat pipe, and certainly, one of the outer injection pipes 22 can be designed to be a straight pipe, and the other outer injection pipe 22 can be designed to be a throat pipe. Referring to fig. 8, when the outer injection pipe 22 is a straight pipe, the straight pipe includes an air suction contraction section 221 and a straight pipe section 222 which are connected in sequence, and the air suction contraction section 221 is communicated with the corresponding air inlet 121 through the straight pipe section 222. Referring to fig. 9, when the outer injection pipe 22 is a throat pipe, the throat pipe includes a suction contraction section 221, a straight pipe section 222 and a diffusion section 223 connected in sequence, one end of the straight pipe section 222 is communicated with the suction contraction section 221, and the other end is communicated with the corresponding air inlet 121 through the diffusion section 223.

Referring to fig. 3-6 and 10, the inner injection pipe 21 includes a vertical section 211, the vertical section 211 may be a straight pipe or a throat pipe, and vertically penetrates through the center of the bottom of the central air cavity 11, the upper end of the vertical section 211 communicates with the central air cavity 11 or the inner air mixing chamber 321 of the inner fire cover 32, and the lower end is inserted between the two outer injection pipes 22 and is fixedly connected with at least one outer injection pipe 22. In this embodiment, two outer injection pipes 22 are respectively and fixedly connected to two opposite outer sides of the lower end of the vertical section 211.

In other embodiments, the inner injection pipe 21 may further include a transverse section 212, referring to fig. 11, the transverse section 212 is horizontally disposed at the bottom of the distributor 1 and located between the two outer injection pipes 22, and the transverse section 212 communicates with the lower end of the vertical section 211, in this case, the vertical section 211 is a straight pipe, and the transverse section 212 is a straight pipe or a throat pipe.

Referring to fig. 2 to 3, in the present embodiment, the outer fire cover 31 has an outer air mixing chamber 311 which is open downward and communicates with the outer ring air chamber 12, and a plurality of outer fire holes 313 communicating with the outer air mixing chamber 311 are provided in the outer side wall circumference of the outer fire cover 31, and when the air mixture is ignited and burned at the outer fire holes 313, an outer ring outer fire is formed, and the secondary air supply of the outer ring outer fire is provided by the air radially outside the burner. In addition, a plurality of cutting grooves 313 are arranged on the inner circumference of the top of the outer fire cover 31, each cutting groove 313 is communicated with the outer air mixing chamber 311, when the air mixture is ignited and combusted at the cutting groove 313, inner ring outer fire is formed, and the secondary air supply of the inner ring outer fire is provided by the air flowing out upwards from the secondary air channel 131. Therefore, the cookware is heated more uniformly by matching the inner ring outer ring fire with the outer ring fire. The inner fire cover 32 is provided with an inner air mixing chamber 321 which is opened downwards and communicated with the central air chamber 11, a plurality of inner fire holes 322 communicated with the inner air mixing chamber 321 are arranged on the periphery of the outer side wall of the inner fire cover 32, and when the mixed air is ignited and combusted at the inner fire holes 322, inner ring fire is formed.

In order to improve the appearance aesthetic property or the decoration performance of the outer fire cover 31, a ring-shaped decoration part 314 is arranged on the top of the outer fire cover 31, the decoration part 314 divides the top of the outer fire cover 31 into an inner side and an outer side, all the cutting grooves 31 are circumferentially and uniformly distributed on the inner side of the top of the outer fire cover 31 at intervals, namely all the cutting grooves 31 are positioned on the radial inner side of the decoration part 314.

The burner also comprises one or two baffles 4 separate from the distributor 1. In the present embodiment, referring to fig. 4 to 5, when the number of the baffle plates 4 is one, one baffle plate 4 is disposed in the outer annular air chamber 12 and above the air outlet direction of the two air inlets 121. Two supporting portions 16 are fixed inside the outer annular air chamber 12 and located at two opposite outer sides of the upper partition portion 122 and extend upward. When the baffle plate is installed, the middle part of the length direction of the baffle plate 4 is abutted against the top of the upper partition part 122, and the radial outer side of the baffle plate 4 is abutted against the outer ring wall 1202 of the outer ring air cavity 12; the opposite ends of the deflector 4 are then connected to the two supports 16 by locking, riveting or welding. After the baffle 4 is mounted in place, a gap 15 for gas to pass through is left between the radially inner side of the baffle 4 and the inner annular wall 1201. When the combustor works, the gas is cut off by the upper partition part 12 after coming out from the two air inlets 121, and moves up along the two lower guide surfaces 124 respectively under the guide effect of the guide plate 4, so that the gas flowing to the outer ring air cavity 12 is mixed with the air more uniformly and the combustion is more uniform and more sufficient through the cooperation of the guide plate 4, the upper partition part 12 and the two lower guide surfaces 124. A gap 15 for gas to pass through is reserved between the radial inner side of the guide plate 4 and the inner ring wall 1201, so that part of mixed gas can flow upwards from the gap 15 to the outer fire cover, and the improvement of the gas outlet efficiency of the outer fire cover is facilitated.

In other embodiments, the number of the flow guide plates 4 may be two, two flow guide plates 4 are respectively disposed above the air outlet direction of the two air inlets 121, one end of each flow guide plate 4 close to the upper partition portion 122 is connected to the upper end or the top of the upper partition portion 122, and the other end is connected to the corresponding support portion 16. After the two flow deflectors 4 are installed in place, the radial outer side of each flow deflector 4 abuts against the outer annular wall 1202 of the outer annular air cavity 12, and a gap 15 for the passage of air is left between the radial inner side of each flow deflector 4 and the inner annular wall 1201.

In order to improve the flow guiding effect of the flow guiding plate 4 on the mixture, an upper flow guiding surface (not shown in the figure) may be disposed on the bottom surface of the flow guiding plate 4. When the number of the guide plates 4 is one, the two opposite sides of the bottom surface of the guide plate 4 are respectively provided with an upper guide surface (not shown in the figure), a clamping groove suitable for being matched with the upper separating part 122 is formed between the two upper guide surfaces, and the clamping groove is clamped on the outer surface of the upper end of the upper separating part 122. Each upper guide surface is an inclined surface or an arc surface having a lower side near the upper partition 122 and a higher side near the upper partition. When the number of the flow guide plates 4 is two, an upper flow guide surface (not shown in the figure) is provided on the bottom surface of each flow guide plate 4, and the upper flow guide surface is an inclined surface or an arc surface which is lower on one side and higher on the other side near the upper partition part 122.

In addition, referring to fig. 12, a plurality of through holes 41 for air to pass through may be further provided on the flow guiding plate 4, so that under the guiding action of the flow guiding plate 4, a part of the mixed air moves upward through the through holes 41 on the flow guiding plate and flows to the outer fire cover 31, and another part of the mixed air moves upward along the two lower guiding surfaces 124 smoothly and flows to the upper plane section 123 and the outer fire cover 31.

Referring to fig. 1-3 and 13-14, the burner further comprises a base 5 disposed below the distributor 1 and the ejector tube assembly, the base 5 is provided with an outer annular air passage (not shown) and an inner annular air passage (not shown), the outer annular air passage is respectively communicated with inlets of the two outer ejector tubes 22, the inner annular air passage is communicated with an inlet of the inner ejector tube 21, a gap 51 for secondary air to pass through is formed between the base 5 and the distributor 1, and the gap 51 is communicated with the inner annular cavity 13 through a secondary air passage 131 to form a secondary air supplement path. From this, through base 5, be convenient for with distributor 1 firm reliable in the cooking utensils casing, through interval 51 between base 5 and distributor 1, when realizing providing secondary air for secondary air passageway 131, reduce the area of contact between distributor 1 and the base 5, do benefit to and reduce distributor 1 and down transmit heat loss.

The outer ring air flue includes outer ring air inlet seat 521, equidirectional and two outer ring air outlet seats 522 and two outer ring nozzles 523 of vertical arrangement, and two outer ring air outlet seats 522 set firmly in same one side of the top of base 5, and two outer ring air outlet seats 522 set firmly in outer ring nozzle 523 respectively in the one side that draws tub 22 outwards, and every outer ring air outlet seat 522 passes through the outer ring nozzle 523 and communicates the entry that draws tub 22 outward correspondingly. The outer ring air inlet seat 521 is fixedly arranged at the bottom of the base 5 and is respectively communicated with the two outer ring air outlet seats 522 and an outer ring air source. In this embodiment, the top of the two outer ring air outlet bases 522 is abutted or connected with the distributor 1, so that the outer ring air outlet bases 522 play a role in supporting the distributor 1, one side of the bottom of the distributor 1, which is close to the outer ring air outlet bases 522, is higher than the top of the base 5, and the interval 51 which can be supplied with air and passes through can be formed between the base 5 and the distributor 1.

The inner ring air passage comprises an inner ring air inlet pipe 531, an inner ring air outlet seat 532 and an inner ring nozzle 533, wherein the inner ring air inlet pipe 531 is transversely and fixedly arranged at the bottom of the base 5 and communicated with an inner ring air source. Referring to fig. 13-14, when the inner injection pipe 21 only includes the vertical section 211, the inner ring outlet seat 532 is vertically fixed at the center of the base 5, and the lower end of the inner ring outlet seat 532 is communicated with the inner ring inlet pipe 531 and the inlet of the inner injection pipe 21 through the inner ring nozzle 533.

Referring to fig. 11 and 15, when the inner injection pipe 21 includes the vertical section 211 and the horizontal section 212, the inner ring outlet seat 532 is vertically fixed on a side of the top of the base 5 away from the outer ring outlet seat 522, and a lower end of the inner ring outlet seat 532 is communicated with the inner ring inlet pipe 531, and a lower end is communicated with an inlet of the inner injection pipe 21 through the inner ring nozzle 533.

In this embodiment, the combustor further includes a plurality of location structures, is equipped with at least one location structure between base 5 top and distributor 1, and/or, is equipped with a location structure between outer ring air flue top and distributor 1, and every location structure includes bellying 61 and constant head tank 62 that cooperatees the grafting.

Referring to fig. 3, 6-7 and 13, when the inner injection pipe 21 only includes the vertical section 211, the upwardly extending protrusion 61 is fixedly disposed at the top of the outer annular air outlet seat 522 of the outer annular air duct, and the upwardly extending protrusion 61 is also fixedly disposed at the top of the base 5 away from the outer annular air outlet seat 522. The bottom of the fire distributor 1 is provided with positioning grooves 62 with downward openings at positions corresponding to the protrusions 61, and each positioning groove 62 is matched and inserted with the corresponding protrusion 61. From this, through the cooperation of three location structure for distributor 1 is reliably installed on base 5 steadily, prevents the aversion of circumferential direction, and two outer loop of make full use of simultaneously go out the top position of gas holder 522. Of course, in other embodiments, the positions of the protruding portion 61 and the positioning groove 62 may be changed, that is, the positioning groove 62 with an upward opening is respectively formed at the top of the base 5 and the top of the outer ring air outlet seat 522, and the protruding portion 61 extending upward is fixedly disposed at the bottom of the fire distributor 1 corresponding to the position of the positioning groove 62.

Referring to fig. 15-16, when the inner injection pipe 21 includes the vertical section 211 and the horizontal section 212, the two outer ring air outlet seats 522 and the two inner ring air outlet seats 532 are respectively and fixedly provided with a protrusion 61 extending upward, the bottom of the fire distributor 1 corresponding to the protrusion 61 is respectively provided with a positioning groove 62 opening downward, and each positioning groove 62 is inserted and matched with the corresponding protrusion 61.

Referring to fig. 1-3, the burner further includes an ignition module 7, and a fixing seat 54 is provided at a position of the base 5 corresponding to the mounting hole 132. The fixing base 54 is provided with an assembly hole 541 suitable for assembling the ignition assembly 7, the ignition assembly 7 vertically penetrates through the mounting hole 132, the lower end of the ignition assembly 7 is matched and inserted with the assembly hole 541 of the fixing base 54, and the upper end of the ignition assembly extends to the upper part of the inner ring cavity 13 and is positioned between the inner fire cover and the outer fire cover for igniting gas flowing out of the inner fire cover 32. Of course, the ignition assembly 7 may be integrated with a flameout protection function in addition to the ignition function, so as to detect whether the burner is flameout.

Specifically, when the mounting port 132 is located between the two outlet ports of the outer nozzle, referring to fig. 5-6, the fixing seat 54 with the mounting hole 541 is fixed on the top of the base 5 at a side away from the outer outlet seat and directly below the mounting port, referring to fig. 13-14. When the mounting port 132 is located between the two air inlet ends of the outer injection device, referring to fig. 7, the fixing seat 54 with the assembling hole 541 is fixedly arranged on one side of the top of the base 5 close to the outer ring air outlet seat and located right below the mounting port.

In this embodiment, at least three support legs 55 are disposed at the bottom of the base 5 to stably and reliably support the base 5 and reduce the contact area between the base 5 and the bottom case of the kitchen range.

Example 2

Referring to fig. 17 or 18, the present embodiment is different from embodiment 1 in the manner of fixing the baffle 4. In this embodiment, the number of the flow guide plates 4 is two, the radial outer sides of the two flow guide plates 4 are respectively and integrally formed with the outer annular wall 1202, and one ends of the two flow guide plates 4 close to the upper partition part 122 are respectively and integrally formed with the two opposite sides of the upper end of the upper partition part 122, so that the two flow guide plates 4, the upper partition part 122 and the outer annular wall 1202 are fixedly connected into a whole, the quick processing and forming are facilitated, and the number of parts required by the assembly process and the assembly is reduced.

In addition, the upper partition 122 may be formed in a manner different from that of embodiment 1, and referring to fig. 15 to 16 and fig. 18 to 19, an upwardly concave and downwardly open groove 17 is provided at the bottom of the distributor 1, and the groove 17 extends upwardly into the outer annular air chamber 12 and is located between the two air inlets 121, and at this time, the groove 17 constitutes the upper partition 122 and functions to partition the mixture gas flowing out from the two air inlets 121.

In addition, the groove 17 may also serve as a location and/or to accommodate the inner ring outlet seat 532. Alternatively, the transverse section 212 of the inner injection pipe 21 is designed to be positioned between the vertical section 211 and the groove 17, and the inlet of the transverse section 212 faces the groove 17, and when installed, the upper end of the inner ring outlet seat 532 is inserted into the groove 17, and the inner ring outlet seat 532 communicates with the inlet of the transverse section 212 through the outer ring nozzle.

Be equipped with open-ended constant head tank 62 down at the top surface of recess 17, this constant head tank 62 is used for cooperateing with the protruding 61 at inner ring gas outlet base 532 top and pegs graft, and during the installation, the upper end of inner ring gas outlet base 532 is inserted and is located recess 17, and the protruding 61 at inner ring gas outlet base 532 top is inserted and is located corresponding constant head tank 62, realizes fixing a position, limiting displacement to the installation of firearm 1.

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 (13)

1. An upper intake air burner, comprising:

the fire distributor (1) is provided with a central air cavity (11), an outer ring air cavity (12) and an inner ring cavity (13), two air inlets (121) which are adjacently arranged are formed in the bottom or inner ring wall (1201) of the outer ring air cavity (12), an upper partition part (122) positioned between the two air inlets (121) is arranged in the outer ring air cavity (12), and a secondary air channel (131) for air to pass through is formed in the bottom of the inner ring cavity (13);

the ejector pipe assembly comprises an inner ejector pipe (21) and two outer ejector pipes (22), the two outer ejector pipes (22) are arranged at the bottom of the distributor (1) in the same direction and are respectively communicated with the two air inlets (121), and the inner ejector pipe (21) is arranged between the two outer ejector pipes (22) and is communicated with the central air cavity (11);

the fire cover assembly comprises an outer fire cover (31) and an inner fire cover (32), the outer fire cover (31) is arranged at the top opening of the outer ring air cavity (12) in a covering mode, and the inner fire cover (32) is arranged at the top opening of the center air cavity (11) in a covering mode.

2. An upper intake air burner according to claim 1, wherein two of the intake ports (121) are opened in the inner annular wall (1201) and are arranged near the upper partition (122), two of the outer injection pipes (22) are horizontally and equidirectionally arranged, and each of the outer injection pipes (22) is fixedly connected to the bottom of the inner annular cavity (13) and the inner annular wall (1201) respectively.

3. An upper air inlet burner according to claim 1 or 2, characterized in that a lower partition part (14) extending downwards is fixedly arranged at the bottom of the fire distributor (1), and the lower partition part (14) is positioned between the inlet air inlet front sides of the two outer ejector pipes (22).

4. The upper intake burner according to claim 1, wherein the inner ejector tube (21) comprises a vertical section (211), the vertical section (211) vertically penetrates through the center of the bottom of the central air cavity (11), the upper end of the vertical section (211) is communicated with the central air cavity (11) or the inner air mixing chamber (321) of the inner fire cover (32), and the lower end of the vertical section is located between the two outer ejector tubes (22) and is fixedly connected with at least one outer ejector tube (22).

5. An upper intake air burner according to claim 1, wherein the bottom surface of the outer ring air chamber (12) comprises an upper plane section (123) and two lower guiding surfaces (124), each lower guiding surface (124) is an inclined or arc surface with one side high and the other side low, and the lower side of each lower guiding surface (124) is connected with the upper partition (122) and the higher side is connected with the upper plane section (123); the two air inlets are respectively arranged close to the lower sides of the two lower flow guide surfaces (124).

6. An upper intake air burner according to claim 1, 2 or 5, wherein a guide plate (4) is respectively arranged above the outlet direction of the two inlet ports (121), one end of each of the two guide plates (4) close to the upper partition part (122) is respectively connected with or abutted against the upper end or two opposite sides of the top of the upper partition part (122), or one end of each of the two guide plates (4) close to the upper partition part (122) is connected with and abutted against the top of the upper partition part (122), and a gap (15) for gas to pass through is reserved between the inner annular wall (1201) and the radial inner side of each of the guide plates (4).

7. An upper intake burner according to claim 6, wherein the radially outer side of the deflector (4) is integrally formed with the outer annular wall (1202) of the outer annular air chamber (12);

or two supporting parts (16) positioned on two opposite outer sides of the upper partition part (122) are arranged in the outer ring air cavity (12), the radial outer side of the guide plate (4) is abutted against the outer ring wall (1202) of the outer ring air cavity (12), and one end of the guide plate (4) far away from the upper partition part (122) is abutted against or connected with the supporting parts (16).

8. An upper air intake burner according to claim 6, characterized in that an upper flow guiding surface is arranged on the bottom surface of the flow guiding plate (4), and the upper flow guiding surface is an inclined surface or an arc-shaped surface which is lower at one side and higher at the other side close to the upper partition part (122); and/or a plurality of through holes (41) for gas to pass through are arranged on the guide plate (4).

9. The upper air inlet burner according to claim 1, further comprising a base (5) arranged below the fire distributor (1) and the ejector pipe assembly, wherein the base (5) is provided with an outer annular air passage and an inner annular air passage, the outer annular air passage is respectively communicated with inlets of the two outer ejector pipes (22), the inner annular air passage is communicated with an inlet of the inner ejector pipe (21), an air supply space (51) is formed between the base (5) and the fire distributor (1), and the space (51) is communicated with the secondary air passage (131).

10. The upper air inlet burner according to claim 9, wherein the outer annular air passage comprises an outer annular air inlet seat (521) and two outer annular air outlet seats (522) which are arranged in the same direction and vertically, the two outer annular air outlet seats (522) are fixedly arranged on the same side of the top of the base (5) and are respectively communicated with inlets of the two outer injection pipes (22), and the outer annular air inlet seat (521) is fixedly arranged at the bottom of the base (5) and is respectively communicated with the two outer annular air outlet seats (522);

the inner ring air flue comprises an inner ring air inlet pipe (531) and an inner ring air outlet seat (532), the inner ring air outlet seat (532) is vertically and fixedly arranged at the central position of the base (5) or one side of the top of the base (5) far away from the outer ring air outlet seat (522), the inner ring air inlet pipe (531) is transversely and fixedly arranged at the bottom of the base (5), and the inner ring air inlet pipe (531) is communicated with the inlet of the inner injection pipe (21) through the inner ring air outlet seat (532).

11. An upper inlet burner according to claim 9 or 10, characterized in that at least one positioning structure is provided between the top of the base (5) and the distributor (1) and/or a positioning structure is provided between the top of the outer annular duct and the distributor (1).

12. The upper intake burner according to claim 11, wherein the positioning structure comprises a protruding portion (61) and a positioning groove (62) which are matched and inserted, the protruding portion (61) extending upwards is fixedly arranged at the top of the base (5) and/or the top of the outer annular air outlet seat (522) of the outer annular air flue, and the positioning groove (62) opening downwards is arranged at the bottom of the distributor (1) corresponding to the protruding portion (61);

or the positioning groove (62) with an upward opening is formed in the top of the base (5) and/or the top of the outer annular air outlet seat (522) of the outer annular air passage, and the protrusion (61) extending downward is arranged at the position, corresponding to the positioning groove (62), of the bottom of the distributor (1).

13. An upper air inlet burner according to claim 9, characterized by further comprising an ignition assembly (7), wherein a mounting hole (132) for the ignition assembly (7) to pass through is formed in the bottom of the inner annular cavity (13), a fixing seat (54) is formed in the position, corresponding to the mounting hole (132), of the base (5), the ignition assembly (7) vertically penetrates through the mounting hole (132), the lower end of the ignition assembly is connected with the fixing seat (54), and the upper end of the ignition assembly extends to the position above the inner annular cavity (13).

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