CN211372406U - Completely upper air inlet type burner - Google Patents

Abstract

The utility model relates to a go up air inlet formula combustor completely, which comprises a base, annular outer loop fire lid, inner ring fire lid and inner ring ejector tube, the base has the centre chamber and encloses the ring cavity of establishing in this centre chamber periphery, the equal open-top in this centre chamber and ring cavity, and above-mentioned inner ring fire lid and outer loop fire lid cover respectively and establish in centre chamber and ring cavity and form inner ring air mixing chamber and outer ring air mixing chamber respectively, the vertical center department of wearing to establish in the ring cavity of above-mentioned inner ring ejector tube, in addition, be provided with the regulating part in the inner ring air mixing chamber, this regulating part is adjustable with the distance of inner ring ejector tube gas outlet. Compared with the prior art, the injection capacity of the inner ring injection pipe can be adjusted by adjusting the distance between the adjusting piece and the air outlet of the inner ring injection pipe, so that the inner ring fire cover can normally burn under different atmospheric conditions, and the burning efficiency is improved.

Description

Completely upper air inlet type burner

Technical Field

The utility model relates to a gas-cooker field especially relates to a go up air inlet formula combustor completely.

Background

The injection structures of the same burners are fixed, the air supply pressures of different gas pipelines are different, and abnormal combustion conditions such as flame leaving or backfire can be caused by high or low gas pressure. In order to increase the adaptability of the combustor, the combustor for the gas stove in the prior art generally adopts an air door structure, and the air door generally adopts an air door sheet and a throttle sheet structure to be matched with the opening of the chassis to realize the adjustment of the air door. For example, chinese utility model patent No. ZL200520117213.9 (No. CN2869625Y) discloses a device for adjusting a gas stove air door, which includes an air flap disposed at an inlet of an injection tube of a gas stove, and is characterized in that the periphery of the air flap has at least one section of circular arc edge using the rotation center of the air flap as the center of circle, the circular arc edge is circumferentially provided with saw-shaped teeth with uniform intervals, the circular arc edge is engaged with a worm through the saw-shaped teeth thereon, the worm is mounted in the gas stove through a worm fixing mechanism, and the lower end of the worm extends out of a bottom shell of the gas stove. The air door structure needs to be operated below the chassis, operation is very inconvenient, and the problems of flameout of the cabinet door and insect feeding caused by opening of the chassis are solved.

Disclosure of Invention

The utility model aims to solve the first technical problem that an injection power adjustable goes up air inlet type combustor completely is provided to prior art.

The utility model aims to solve the second technical problem that provide an efficient complete enterprising wind formula combustor of drawing to prior art.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a go up air inlet formula combustor completely, includes the base, annular outer loop fire lid, inner ring fire lid and inner ring ejector tube, the base has the central cavity and encloses the ring chamber of establishing in this central cavity periphery, the equal open-top in this central cavity and ring chamber, and above-mentioned inner ring fire lid and outer ring fire lid cover respectively and establish in central cavity and ring chamber and form inner ring air mixing chamber and outer ring air mixing chamber respectively, its characterized in that, the vertical center department of wearing to establish in the ring chamber of inner ring ejector tube, in addition, be provided with the regulating part in the inner ring air mixing chamber, this regulating part and the inner ring ejector tube gas outlet apart from adjustable.

The primary air coefficient of the atmospheric burner is usually 0.45-0.75, and the distance D between the adjusting piece and the air outlet of the inner ring injection pipe is-2 mm and not more than 2 mm. Distance D2 mm indicates that this regulating part is located the inner ring and draws and penetrates a tub gas outlet top, and the distance D between the pipe gas outlet is 2mm is drawn to the bottom of regulating part and inner ring, and distance D2 mm indicates that the regulating part stretches into the inner ring and draws and penetrate in the pipe gas outlet to the distance D between the pipe gas outlet is 2mm is drawn to the bottom of regulating part and inner ring. And when D is more than or equal to-2 mm and less than or equal to 0, the distance between the adjusting piece and the air outlet of the inner ring injection pipe and the primary air coefficient injected by the inner ring injection pipe are in a decreasing relation, namely when the distance D is increased, the primary air coefficient is reduced, and when the distance D is reduced, the primary air coefficient is increased.

The adjusting piece is a cylinder, the maximum diameter R of the adjusting piece is less than or equal to 6mm, and when R is greater than 6mm, the primary air coefficient is less than 0.45, and the combustion working condition is rapidly deteriorated.

The inner ring draws the ejector pipe from lower to upper includes loudspeaker section, roar hole and diffusion section in proper order, and in this embodiment, when above-mentioned regulating part stretches into the gas outlet of inner ring draw ejector pipe and when continuing to draw intraduct to the inner ring and deeply, it can be located the gas outlet of above-mentioned inner ring draw ejector pipe all the time, preferably, the length of this regulating part can go deep into the diffusion section of inner ring draw ejector pipe to can adjust the injection ability that inner ring draws the ejector pipe through the length of adjusting the diffusion section. Further preferably, the length of the adjusting piece can further penetrate into the throat of the inner ring injection pipe, so that the air intake quantity of the primary air can be further adjusted by adjusting the size of the throat.

As preferred, above-mentioned inner ring fire lid includes the pedestal of tube-shape and covers the end cover of sealing on this pedestal open-top, is provided with the inner ring fire hole along circumference on the lateral wall of above-mentioned pedestal, and above-mentioned regulating part is the cylinder, and vertical downwardly extending has adjusting sleeve on the lower surface of above-mentioned end cover, and the upper end and this adjusting sleeve threaded connection of regulating part can adjust regulating part and inner ring through adjusting the relative position between regulating post and the adjusting sleeve like this and draw and penetrate the pipe and draw and penetrate relative distance.

Preferably, the gas mixing device further comprises two outer ring injection pipes, each outer ring injection pipe is communicated with the outer ring gas mixing cavity, the two outer ring injection pipes are transversely arranged in opposite directions, and gas inlets of the two outer ring injection pipes are staggered. Be provided with two outer loops and draw and penetrate the pipe and can improve the outer loop fire and cover draw and penetrate efficiency, two outer loops draw and penetrate the equal horizontal setting of pipe to enable each outer loop and draw the gas outlet that penetrates the pipe and directly stretch into outer loop gas mixing chamber, reduce the outer loop and draw the energy loss of the mist in the pipe in transmission process, guarantee that the outer loop draws the high efficiency that penetrates the pipe and draw and penetrate, two outer loops draw the air inlet that penetrates the pipe and stagger each other, thereby can avoid mutual interference between them, further improve and draw and penetrate efficiency.

The sizes of the cross sections of the outer ring air mixing cavities are alternately changed in an increasing and decreasing mode along the circumferential direction, the air outlets of the outer ring injection pipes are respectively located at the maximum positions of the cross sections of the outer ring air mixing cavities, and the decreasing directions of the cross sections of the outer ring air mixing cavities are clockwise or anticlockwise. Therefore, two airflows flowing out of the two outer ring injection pipes can flow in the same direction (clockwise or anticlockwise) along with the change of the inner shape of the outer ring air mixing cavity and are mixed with each other, so that the injection effect is improved.

Preferably, a nozzle seat is arranged below the base and comprises a disc-shaped seat body, an inner ring nozzle is vertically arranged at the center of the top surface of the seat body, the inner ring injection pipe is located above the inner ring nozzle, and a gas outlet of the inner ring nozzle is opposite to a gas inlet of the inner ring injection pipe.

Compared with the prior art, the utility model has the advantages of: the utility model discloses be provided with the regulating part in the well inner ring gas mixing cavity, this regulating part draws the distance of penetrating the pipe gas outlet with the inner ring adjustable to draw the ability of drawing that the pipe was penetrated to the inner ring can be adjusted through the distance of adjusting between regulating part and the inner ring and penetrate the pipe gas outlet, and then make the inner ring fire lid homoenergetic normal combustion under the atmospheric condition of difference, improve the efficiency of burning.

Drawings

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

FIG. 2 is a schematic view of the structure of FIG. 1 in another direction;

FIG. 3 is an enlarged view of portion G of FIG. 2;

FIG. 4 is a partial exploded view of a burner according to an embodiment of the present invention;

FIG. 5 is a schematic view of the structure of FIG. 4 in another direction;

FIG. 6 is a partial exploded view of the nozzle holder according to an embodiment of the present invention;

FIG. 7 is a partial sectional view of a burner according to an embodiment of the present invention;

FIG. 8 is an enlarged view of portion H of FIG. 7;

fig. 9 is a schematic structural diagram of a base according to an embodiment of the present invention;

fig. 10 is a schematic structural view of an ignition needle according to an embodiment of the present invention;

fig. 11 is a schematic structural view in another direction of fig. 10.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 11, a burner with complete top air intake includes a base 51, an annular outer ring fire cover 52, an inner ring fire cover 53, an outer ring ejector tube 54, an inner ring ejector tube 55, and an ignition needle 56. The base 51 is provided with a central cavity 511 and an annular cavity 512 surrounding the periphery of the central cavity 511, the top of the central cavity 511 and the top of the annular cavity 512 are both open, the inner ring fire cover 53 and the outer ring fire cover 52 are respectively covered on the central cavity 511 and the annular cavity 512 to respectively form an inner ring air mixing cavity 5110 and an outer ring air mixing cavity 5120, and the inner ring air mixing cavity 5110 and the outer ring air mixing cavity 5120 are respectively communicated with the inner ring ejector pipe 55 and the outer ring ejector pipe 54. In this embodiment, two outer ring injection pipes 54 are provided, each outer ring injection pipe 54 is communicated with the outer ring gas mixing chamber 5120, and the two outer ring injection pipes 54 are transversely disposed in opposite directions, and the gas inlets 128 of the two outer ring injection pipes are staggered. Be provided with two outer rings and draw the injection efficiency that the pipe 54 can improve outer ring fire lid 52, two outer rings draw and penetrate the equal horizontal setting of pipe 54, thereby enable that each outer ring draws the gas outlet that penetrates the pipe 54 and directly stretch into outer ring air mixing chamber 5120, reduce the energy loss of the mist in the outer ring draws the pipe 54 in the transmission course, guarantee that the outer ring draws the high efficiency that penetrates the pipe 54 and draw, the air inlet 128 of two outer rings draw and penetrate the pipe 54 staggers each other, thereby can avoid mutual interference between them, further improve and draw and penetrate efficiency.

The cross section of the outer ring air mixing cavity 5120 is changed in an increasing and decreasing alternating manner along the circumferential direction, the air outlets of the outer ring ejector pipes 54 are respectively located at the maximum cross section of the outer ring air mixing cavity 5120, and the decreasing directions of the cross sections of the outer ring air mixing cavity 5120 of the two outer ring air mixing cavities are clockwise or counterclockwise. Thus, the two airflows flowing out of the two outer ring ejector pipes 54 can flow in the same direction (clockwise or counterclockwise) along with the change of the inner shape of the outer ring air mixing chamber 5120 and are mixed with each other, thereby increasing the ejector effect. The alternation of the cross section of the outer ring air mixing chamber 5120 can be realized in various forms, and for the convenience of manufacturing, it is preferable that the bottom surface of the ring chamber 512 is formed with protrusions 5121 and grooves 5122 alternately spaced along the circumferential direction. Furthermore, each groove 5122 inclines from outside to inside, the width of each groove 5122 decreases progressively in the clockwise or counterclockwise direction, the height of each protrusion 5121 adjacent to each groove 5122 increases progressively in the same direction as that of the groove 5122, the width of each protrusion 5121 increases progressively synchronously, and a pair of adjacent grooves 5122 and adjacent protrusions 5121 are spliced to form a section of arc section on the bottom surface of the annular cavity 512, so that two airflows flowing out from two outer ring injection pipes 54 can respectively flow in the same direction in the outer ring air mixing cavity 5120 in a rotating manner, so that the two airflows are better promoted mutually, and the injection effect is further enhanced. In addition, the alternate change of the outer ring air mixing chamber 5120 can reduce the volume of the outer ring air mixing chamber 5120 to a certain extent, thereby preventing the detonation phenomenon generated during the combustion process due to the excessive volume of the outer ring air mixing chamber 5120.

Still further, the end face of the highest position of the protrusion 5121 is a vertical face, that is, one side of the air outlet of each outer ring injection pipe 54, which is led into the outer ring air mixing cavity 5120, is a vertical face 5123, so that the resistance at the air outlet of each outer ring injection pipe 54 can be reduced, and the air flow can enter the outer ring air mixing cavity 5120 and flow along the outer ring air mixing cavity 5120.

The injection structures of the same burners are fixed, the air supply pressures of different gas pipelines are different, and abnormal combustion conditions such as flame leaving or backfire can be caused by high or low gas pressure. In order to increase the adaptability of the combustor, the combustor for the gas stove in the prior art generally adopts an air door structure, and the air door generally adopts an air door sheet and a throttle sheet structure to be matched with the opening of the chassis to realize the adjustment of the air door. For example, chinese utility model patent No. ZL200520117213.9 (No. CN2869625Y) discloses a device for adjusting a gas stove air door, which includes an air flap disposed at an inlet of an injection tube of a gas stove, and is characterized in that the periphery of the air flap has at least one section of circular arc edge using the rotation center of the air flap as the center of circle, the circular arc edge is circumferentially provided with saw-shaped teeth with uniform intervals, the circular arc edge is engaged with a worm through the saw-shaped teeth thereon, the worm is mounted in the gas stove through a worm fixing mechanism, and the lower end of the worm extends out of a bottom shell of the gas stove. The air door structure needs to be operated below the chassis, operation is very inconvenient, and the problems of flameout of the cabinet door and insect feeding caused by opening of the chassis are solved. Therefore, in this embodiment, the inner ring injecting pipe 55 vertically penetrates through the center of the ring cavity 512, in addition, an adjusting part 57 is arranged in the inner ring gas mixing cavity 5110, the distance between the adjusting part 57 and the air outlet of the inner ring injecting pipe 55 is adjustable, and the distance D between the adjusting part 57 and the air outlet of the inner ring injecting pipe 55 is-2 mm or more and 2mm or less because the primary air coefficient of the atmospheric burner is usually 0.45-0.75. The distance D is 2mm, the distance D between the bottom end of the adjusting piece 57 and the air outlet of the inner ring injection pipe 55 is-2 mm, the adjusting piece 57 extends into the air outlet of the inner ring injection pipe 55, and the distance D between the bottom end of the adjusting piece 57 and the air outlet of the inner ring injection pipe 55 is 2 mm. And when D is more than or equal to-2 mm and less than or equal to 0, the distance between the adjusting piece 57 and the air outlet of the inner-ring injection pipe 55 and the primary air coefficient injected by the inner-ring injection pipe 55 are in a decreasing relation, namely when the distance D is increased, the primary air coefficient is reduced, and when the distance D is reduced, the primary air coefficient is increased. In the embodiment, the adjusting member 57 is a cylinder, and the maximum diameter R of the adjusting member 57 is less than or equal to 6mm, because when R is greater than 6mm, the primary air coefficient is less than 0.45, and the combustion condition is rapidly deteriorated. The inner-ring ejector pipe 55 sequentially comprises a horn section 551, a roar 552 and a diffuser section 553 from bottom to top, in this embodiment, when the adjusting member 57 extends into the air outlet of the inner-ring ejector pipe 55 and continues to penetrate into the inner-ring ejector pipe 55, the adjusting member 57 can be always located in the air outlet of the inner-ring ejector pipe 55, preferably, the length of the adjusting member 57 can penetrate into the diffuser section 553 of the inner-ring ejector pipe 55, so that the ejection capacity of the inner-ring ejector pipe 55 can be adjusted by adjusting the length of the diffuser section 553. Further preferably, the adjusting member 57 is further extended to the throat 552 of the inner annular injector tube 55, so that the amount of primary air introduced can be further adjusted by adjusting the size of the throat 552.

Further, in this embodiment, the inner ring fire cover 53 includes a cylindrical base 531 and an end cover 532 covering the top opening of the base 531, the side wall of the base 531 is circumferentially provided with an inner ring fire hole 530, the adjusting member 57 is a cylinder, the lower surface of the end cover 532 vertically extends downward to form an adjusting sleeve 5321, the upper end of the adjusting member 57 is in threaded connection with the adjusting sleeve 5321, so that the injection relative distance between the adjusting member 57 and the inner ring injection pipe 55 can be adjusted by adjusting the relative position between the adjusting member 57 and the adjusting sleeve 5321. In this embodiment, the free end of the adjusting member 57 is enlarged to form the end cap 571, i.e. the diameter of the adjusting member 57 is at the maximum at the end cap 571. In particular, the adjusting member 57 is a screw in this embodiment.

In this embodiment, the top edge of the inner ring fire cover 53 is recessed radially inward in the circumferential direction to form a first ring groove 533, the first ring groove 533 is overlapped on the ring wall of the central cavity 511, the top edges of the cavity walls on both sides of the ring cavity 512 are recessed inward in the circumferential direction to form second ring grooves 5123, and the bottom edges of the inner ring wall 522 and the outer ring wall 523 of the outer ring fire cover 52 are overlapped on the corresponding second ring grooves 5123. The inner ring fire cover 53 and the outer ring fire cover 52 are buckled with the base 51 up and down to form a whole body through riveting. The structure of a whole makes the simple structure of combustor, convenient cleanness to assembly position is few, can effectively avoid gas leakage, and can effectively reduce the heat dissipation of combustor, and then improves the combustion efficiency of combustor.

The outer ring fire cover 52 is provided with an outer ring fire hole 520, the depth of the outer ring fire hole 520 is smaller and less than or equal to 2mm, the depth of the outer ring fire hole 520 in the embodiment is smaller and is realized through a thin plate structure, namely, the whole outer ring fire cover 52 in the embodiment adopts a thin plate structure. The depth of the outer ring fire hole 520 is small, so that the resistance at the outer ring fire hole 520 can be reduced, the resistance at the air outlet of the outer ring injection pipe 54 is reduced, and the injection strength of the outer ring injection pipe 54 is improved. The outer ring fire cover 52 comprises a fire cover body, the fire cover body comprises an annular top wall 521, an inner ring wall 522 and an outer ring wall 523, the inner ring wall 522 and the outer ring wall 523 respectively incline or vertically extend downwards from the inner edge and the outer edge of the top wall 521, the top wall 521 inclines from inside to outside along the circumferential direction, the outer ring fire holes 520 are distributed on the top wall 521, so that the phenomenon that overflowing liquid is remained on the outer ring fire cover 52 can be effectively avoided, the outer ring fire holes 520 are prevented from being blocked by overflowing liquid,

the outer ring fire hole 520 is a small hole, and the pore canal of the outer ring fire hole is inclined outwards from bottom to top, the outer ring fire hole 520 is circumferentially arranged on the top wall 521 of the outer ring fire cover 52 and is arranged side by side up and down to form a flame zone 524, the flame zone 524 is located on the upper portion of the top wall 521, and the outer side end of the flame zone 524 is circumferentially provided with burning prevention zones 525 for preventing the support legs of the pot support from being burned at intervals. The outer ring fire holes 520 adopt small holes distributed in inner and outer rows to increase the contact area of flame and air and ensure that the mixed gas of gas and air is fully contacted with secondary air, thereby ensuring the full combustion of the gas and avoiding the problem of yellow flame and simultaneously ensuring that the temperature of the flame is more uniform. Preferably, the hole interval between each adjacent outer ring fire hole 520 is less than or equal to the twice of outer ring fire hole 520's aperture, because outer ring fire hole 520's degree of depth is less in this embodiment, the too fast problem of speed of giving vent to anger can be brought to gas resistance undersize, and outer ring fire hole 520 adopts the aperture structure, and the multirow is laid, can interact and form stronger steady flame effect between each outer ring fire hole 520's the flame, even local fire hole blocks up, flame still can the stable combustion. In the embodiment, the aperture of the outer ring fire hole 520 is smaller than or equal to 1.6mm, the depth of the outer ring fire hole 520 is smaller than or equal to 2mm, and the thermal strength of the fire hole is 3-5 × 103kW/mm2, so that the risk of backfire can be effectively solved, and the adaptability of the combustor 5 to the pressure change and the fluctuation of gas components is effectively improved.

The upper end of the inner wall 522 of the outer ring fire cover 52 is provided with a fire transfer groove 526 extending vertically, the fire transfer groove 526 is communicated with the outer ring air mixing chamber 5120, and the upper end of the fire transfer groove 526 is adjacent to the flame zone 524. In this embodiment, the inner annular wall 522 of the outer annular fire cover 52 is inclined downward from outside to inside from the inner edge of the top wall 521 of the outer annular fire cover 52 to form an inclined annular wall 527, the inner edge of the inclined annular wall 527 extends vertically downward to form a vertical annular wall 528, the inclined annular wall 527 and the vertical annular wall 528 form the inner annular wall 522, and the fire transfer groove 526 extends from outside to inside from the inner edge of the inner annular wall 522 to the upper portion of the vertical annular wall 528, so that the fire transfer groove 526 can be as close to the inner annular fire cover 53 as possible, and the success rate of transferring fire from the inner ring to the outer ring can be further improved. The width of the fire transfer groove 526 is gradually increased from outside to inside, so that the air outlet quantity of the inner side of the fire transfer groove 526 is large, the success rate of transferring fire from the inner ring to the outer ring is guaranteed, the air outlet quantity of the outer side of the fire transfer groove 526 is small, and the interference of the fire transfer groove 526 on secondary air required by the outer ring fire hole 520 is reduced. Preferably, in this embodiment, the fire transfer grooves 526 are two parallel grooves, so as to improve the fire transfer stability. In addition, in this embodiment, the fire transfer groove 526 is disposed above the outer ring injection pipe 54, so that interference of secondary air on the inner side fire transfer gas is reduced, fire transfer is more stable, and influence of fire transfer flame on the secondary air is reduced.

An annular gap is reserved between the annular cavity 512 and the central cavity 511, an annular cover body 58 taking the central cavity 511 as the center is arranged in the annular gap, the opening edge of the upper opening of the cover body 58 is connected with the outer peripheral surface of the annular cavity 512 into a whole, the two outer-ring injection pipes 54 are respectively arranged at the bottom of the cover body 58, the top surface of each outer-ring injection pipe 54 is connected with the bottom surface of the cover body 58 into a whole, and therefore secondary air channels 59 formed by the bottom surface of the bottom wall of the annular cavity 512 and the top surface of the cover body 58 are respectively formed on two sides of the bottom of the base 51. The cover 58 is opened with an assembly port 581, and the ignition pin 56 is installed in the assembly port 581. Thus, the secondary air passage 59 can promote the combustion of the flame in the inner ring fire hole 530 and can also play a role of assisting the ignition. In addition, the setting through the cover body 58 can realize the reposition of redundant personnel of primary air and secondary air, avoids the gas mixture after the burning to sneak into each and draws in the pipe to guarantee the normal combustion of combustor 5.

Further, preferably, the top surface of the cover 58 is inclined from top to bottom in the circumferential direction, and the bottom surface of the bottom wall of the annular cavity 512 corresponding to each secondary air passage 59 is inclined from outside to inside, so that each secondary air passage 59 is inclined upwards, the length of each secondary air passage 59 can be reduced, and the resistance to airflow can be reduced. In addition, the temperature of the air around the burner 5 is higher and higher as the distance from the burner 5 is reduced during the combustion process, and the secondary air passage 59 is inclined upward to approach the flow direction of the hot secondary air as the pressure is gradually increased, thereby reducing the energy loss in the flow.

Still further, the bottom surface of the bottom wall of the annular cavity 512 corresponding to each secondary air channel 59 is spirally raised from the outer ring injection pipe 54 on one side to the outer ring injection pipe 54 on the other side, so that the airflow forms a vortex in the secondary air channel 59, the speed of guiding the secondary air to the inner ring fire hole 530 can be reduced, and the effects of stabilizing flame and assisting ignition are further improved.

In this embodiment, in order to make the airflow flow better in each secondary air passage 59, the upper surface of the outer end of each outer ring injection pipe 54 is recessed downward and the cover 58 covers the top surface of the outer ring injection pipe 54, the mouth edge of the upper port of the cover 58 is smoothly connected with the outer peripheral surface of the annular cavity 512, and the upper surface of the cover 58 and the bottom surface of the bottom wall of the annular cavity 512 are both smooth, so that the airflow can be better guided to flow along the secondary air passage 59 under the action of wall adhesion.

The side wall of the air inlet of each outer ring injection pipe 54 extends outwards along the circumferential direction to form a first blocking wall 582, and the upper end edge of the first blocking wall 582 is connected with the bottom surface of the cover 58 into a whole. The outer edge of the first blocking wall 582 is located at the bottom of the cover 58, and the outer edge extends toward the other side along the circumferential direction of the cover 58 to form a second blocking wall 583, the free end of the second blocking wall 583 is sleeved on the outer ring injection pipe 54 and is connected with the outer circumferential surface of the outer ring injection pipe 54 into a whole, and the upper end edge of the second blocking wall 583 is connected with the bottom surface of the cover 58 into a whole. Through the setting of first wall 582 and second wall 583 that keeps off to separate the space of cover 58 bottom, make each outer loop draw the air inlet department of penetrating pipe 54 to form independent air inlet space respectively, guarantee penetrating of sufficient primary air, avoid two outer loops to draw and penetrate pipe 54 and take place to rob the phenomenon of air. The nozzle holder 50 is disposed below the cover 58, and includes a disc-shaped base 501, an air inlet gap is formed between the lower end edge of each second blocking wall 583 and the top surface of the base 501, and preferably, the lower end edge of each second blocking wall 583 is wavy, so that the appearance of the burner 5 is beautiful, primary air can be promoted to enter the space partitioned by the first blocking wall 582 and the second blocking wall 583, and the air inlet gap can be prevented from being blocked by the downward flow of overflow along the surface of the cover 58 and the second blocking wall 583. In addition, the bottom parts of the two ends of each second blocking wall 583 are respectively provided with a cushion block 5831, the bottom parts of the cushion blocks 5831 are respectively abutted against the top surface of the base 501, and each cushion block 5831 can vertically position the combustor 5, so that the mounting stability of the combustor 5 is improved, downward heat transfer in the combustion process can be reduced, the heat efficiency is improved, and the influence on the heat load is reduced.

An inner ring nozzle 502 is vertically arranged at the center of the top surface of the base 501 of the nozzle holder 50, the inner ring ejector pipe 55 is positioned above the inner ring nozzle 502, and a gas outlet of the inner ring nozzle 502 is opposite to an air inlet of the inner ring ejector pipe 55. Two sides of the inner ring nozzle 502 are respectively provided with an outer ring nozzle 503, and the gas outlet of each outer ring nozzle 503 is opposite to the gas inlet of the corresponding outer ring injection pipe 54. Moreover, each outer ring nozzle 503 is positioned with the cover 58 by a snap-fit structure, thereby facilitating the assembly of the nozzle holder 50 with the burner 5. Specifically. In this embodiment, the top of each outer ring nozzle 503 is provided with a positioning protrusion 5031, and the corresponding position of the bottom surface of the cover 58 is provided with a positioning groove 584 for the corresponding positioning protrusion 5031 to insert.

The ignition needle 56 is vertically disposed on the nozzle holder 50, and the upper end of the ignition needle 56 passes through the assembly hole 581 of the cover 58, the ignition needle 56 includes a protective case 560, and an electrode needle inserted in the protective case 560, one end of which is exposed to the protective case 560, the electrode needles include a first electrode needle 561 as a discharge end and a second electrode needle 562 capable of functioning as a receiving end, and the length of the first electrode needle 561 is shorter than that of the second electrode needle 562, in the assembled state, the first electrode needle 561 and the second electrode needle 562 both extend vertically upwards and then bend towards the inner fire cover 53, and the bending parts of the two are inclined towards the opposite direction relative to the inner fire cover 53, and, the distance from the end of the first electrode needle 561 to the inner fire cover 53 is smaller than the distance from the end of the second electrode needle 562 to the inner fire cover 53, and the distance between the end of the first electrode needle 561 and the end of the second electrode needle 562 is the shortest distance therebetween. Therefore, the first electrode needle 561 can preferably discharge to the inner ring fire cover 53, and can be conducted through the second electrode needle 562 when the loop of the burner 5 is blocked by foreign matters, the ignition success rate is improved, and the normal work of the burner 5 is ensured. In this embodiment, the protective shell 560 is a ceramic body.

Further, the whole rectangular form that is vertical extension of appearance of ignition needle 56 because the mounting hole 5011 of the base 501 of above-mentioned nozzle block 50 is worn to establish by the lower extreme of ignition needle 56, and the upper end is worn to establish on the cover body 58, therefore the appearance of ignition needle 56 is rectangular form and can effectively reduce the area that blocks of penetrating the pipe air inlet to each to reduce the influence that the setting of ignition needle 56 penetrated the performance to combustor 5.

Further, the top surface of the protective shell 560 is stepped, and the first electrode needle 561 and the second electrode needle 562 are respectively vertically arranged on the top surface of the protective shell 560, so that accumulated water can be prevented from being formed on the top surface of the protective shell 560, and further the root of the electrode needle is prevented from discharging due to the accumulated water.

Further, the middle portion of the protective case 560 extends outward in the circumferential direction to form a positioning boss 5601, and when the ignition needle 56 is inserted into the base 501, the positioning boss 5601 is supported on the edge of the mounting hole 5011, so that the ignition needle 56 can be stably inserted into the seat body 531. Further, the bottom of the positioning bump 5031 has a reinforcing piece 5602 protruding outward 5121, so that the strength of the ignition pin 56 can be enhanced to prevent the ignition pin 56 from being broken when the burner 5 is assembled and disassembled.

In addition, the projection of the electrode pins on the horizontal plane does not exceed the maximum cross section of the protective case 560, so that the ignition pin 56 can smoothly pass through the positioning hole 585 of the housing 58.

Further, be provided with in the above-mentioned kitchen shell 1 can with above-mentioned ignition needle 56 complex ion igniter 563, combustor 5 in this sample embodiment need not to set up the thermocouple in addition, can play the effect of thermocouple through the cooperation of ion igniter 563 and first electrode needle 561 to make combustor 5's structure simpler, avoid setting up the thermocouple and make the space below the cover body 58 local promotion, and then cause the influence to each drawing the penetrating performance of penetrating the pipe.

Claims (10)

1. The burner is characterized in that the base (51) is provided with a central cavity (511) and an annular cavity (512) surrounding the periphery of the central cavity (511), the top of the central cavity (511) and the top of the annular cavity (512) are both open, the inner ring fire cover (53) and the outer ring fire cover (52) are respectively covered on the central cavity (511) and the annular cavity (512) to form an inner ring air mixing cavity (5110) and an outer ring air mixing cavity (5120), the inner ring injection pipe (55) vertically penetrates through the center of the annular cavity (512), an adjusting piece (57) is arranged in the inner ring air mixing cavity (5110), and the distance between the adjusting piece (57) and an air outlet of the inner ring injection pipe (55) is adjustable.

2. The burner with complete upper air intake according to claim 1, wherein the distance D between the adjusting piece (57) and the air outlet of the inner ring injection pipe (55) is-2 mm < D < 2 mm.

3. A burner as claimed in claim 1, characterised in that said adjustment element (57) is a cylinder and has a maximum diameter R ≦ 6 mm.

4. The burner of claim 1, wherein the inner annular injector tube (55) includes, from bottom to top, a flared section (551), a throat (552) and a diffuser section (553), the adjuster (57) being located at the outlet of the inner annular injector tube (55) when it extends into the outlet of the inner annular injector tube (55) and continues to extend inwardly of the inner annular injector tube (55).

5. The burner of claim 4, wherein the length of the adjusting member (57) is extended to the diffuser (553) of the inner ring injector (55).

6. A burner as claimed in claim 4, characterised in that the adjustment member (57) is of a length to reach further into the throat (552) of the inner annular eductor tube (55).

7. The burner of any one of claims 1 to 6, wherein the inner ring fire cover (53) comprises a cylindrical base body (531) and an end cover (532) covering the top opening of the base body (531), the side wall of the base body (531) is circumferentially provided with inner ring fire holes (530), the lower surface of the end cover (532) is vertically extended downwards to form an adjusting sleeve (5321), and the upper end of the adjusting member (57) is in threaded connection with the adjusting sleeve (5321).

8. The full upper air intake type burner according to any one of claims 1 to 6, further comprising two outer ring ejector pipes (54), wherein each outer ring ejector pipe (54) is respectively communicated with the outer ring air mixing chamber (5120), the two outer ring ejector pipes (54) are transversely arranged in opposite directions, and air inlets (128) of the two outer ring ejector pipes are staggered.

9. The burner with complete upper air intake according to claim 8, wherein the cross-sectional size of the outer ring air mixing chamber (5120) changes alternately in an increasing and decreasing manner along the circumferential direction, the air outlet of each outer ring ejector pipe (54) is respectively positioned at the maximum of the cross-sectional area of the outer ring air mixing chamber (5120), and the decreasing directions of the cross-sectional areas of the outer ring air mixing chambers (5120) of the two chambers are both clockwise or counterclockwise.

10. The burner of any one of claims 1 to 6, wherein a nozzle holder (50) is arranged below the base (51) and comprises a disk-shaped base (501), an inner ring nozzle (502) is vertically arranged at the center of the top surface of the base (501), the inner ring injection pipe (55) is positioned above the inner ring nozzle (502), and a gas outlet of the inner ring nozzle (502) is opposite to an air inlet of the inner ring injection pipe (55).

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