CN110836370A - An updraft burner - Google Patents

Abstract

The invention relates to an upper air inlet burner, which is characterized in that it comprises a base with a first concave cavity, a connecting body arranged on the base, an inner ring gas mixing chamber and an inner ring ejection pipe. The lower part is laterally arranged in the first concave cavity gradually and inclined downward, and a buffer cavity is formed with the lower surface of the connecting body. The ring gas channel is in fluid communication, and the gas inlet end of the inner ring ejection tube is fitted with an inner ring nozzle. Compared with the prior art, the present invention has the advantage that the buffer cavity is arranged so that the gas outlet end of the inner ring ejection tube can be The ejected primary air/gas mixture has a buffer space, and the primary air after the buffer cavity is uniformly mixed with the primary air to avoid the collision of the gas and the primary air in different directions, which further improves the mixing efficiency of the primary air and the gas. uniformity, so that the flame of the upper inlet burner is short, uniform and powerful.

Description

An updraft burner

technical field

The invention relates to a burner of a gas cooker, in particular to a burner of an upper air intake type cooker.

Background technique

Existing burners are gas systems commonly used in household gas stoves and integrated stoves. The main purpose is to provide heat to food or water in the appliance. Existing burners are generally classified into lower-inlet burners and upper-inlet burners according to the primary air intake method. There are two types of air burners. The existing upward air burner generally adopts a multi-nozzle design, and the ejector tube is generally short, and the premixing after primary air intake is not sufficient, resulting in insufficient gas combustion, affecting the gas combustion conditions, and prone to yellowing. In order to solve the above problems, the Chinese invention patent "A High-Power Burner with Up Air Inlet" with the patent number of ZL201620644143.0 (authorized announcement number CN205746832U) discloses a Y-shaped distribution through the burner base. The Venturi conical ejector tube design effectively extends the length of the ejector tube, so that the disposable air can be fully premixed with the gas to ensure that the gas can be fully burned. There are burning fire holes on it, the shape of the holes is circular, evenly distributed around the outer ring surface, and there are also burning fire holes distributed on the inner inclined surface, and the burning fire holes are evenly distributed around the inner inclined surface, forming two concentric fires inside and outside. Or a Chinese utility model patent No. ZL200520061453.1 (authorized announcement No. CN2804628Y) "Face Inlet Type Cooker Burner", which provides a burner that forms a center fire, a middle ring fire and an outer ring fire. There is an inner concave platform at the lower end of the air intake column on the outer ring fire divider, and the air in the chassis is very On the channel, the upper end face of the air outlet column cooperates with the inner concave platform, and the outer surface of the air outlet column cooperates with the inner surface of the inner concave platform to the end of the air intake column for air sealing. Although the above-mentioned prior art discloses two rings and three rings. The upper air inlet burner of the ring fire, but the multi-ring fire that needs to be truly concentric for the upper air inlet is satisfied: each ring fire maintains a stable and uniform flame to avoid subsequent combustion problems of the burner itself.

SUMMARY OF THE INVENTION

A technical problem to be solved by the present invention is to provide an upper intake air burner that can make the primary air/gas mixture in the inner ring mix more uniformly in view of the above-mentioned current state of the art.

Another technical problem to be solved by the present invention is to provide an upper intake air burner that can make the secondary air supplementary air more uniform and sufficient for the inner ring fire cover with the concentric two-ring fire.

The technical solution adopted by the present invention to solve the above technical problems is: the upper air inlet burner is characterized in that it includes:

a base having a centrally located first cavity;

The connecting body is arranged on the base and includes a plate body, and the center position of the plate body corresponds to the first cavity and has a vertical inner ring gas channel;

The inner ring gas mixing chamber is arranged above the inner ring gas channel, and the inner ring gas mixing chamber includes an inner ring wall surface and an outer ring wall surface which are annular and concentrically spaced and connect the inner ring wall surface and the outer ring wall surface. a bottom wall, the inner ring wall surface and the outer ring wall surface are covered with an inner ring fire cover, and the bottom wall is provided with a first through hole communicating with the inner ring gas channel; and

The inner-ring ejection tube is horizontally arranged in the first concave cavity gradually and inclined downward from top to bottom, and a buffer cavity is formed with the lower surface of the plate body, and is located at the outlet of the lower end of the inner-ring ejection tube. The gas port end is in fluid communication with the inner ring gas channel through the buffer cavity, and the gas inlet end located at the upper end of the inner ring injection pipe is fitted with an inner ring nozzle.

Further, it also includes an outer ring air mixing chamber arranged on the periphery of the inner ring air mixing chamber, the outer ring air mixing chamber is supported on the plate body, and the outer ring air mixing chamber is connected to the plate body. The gap forms a secondary air inlet channel for supplying air to the inner and outer periphery of the inner ring air mixing chamber. In this way, the outer ring air mixing chamber is independently supported by the first supporting feet, and the bottom circle of the outer ring air mixing chamber is a secondary air inlet channel. The ring is fully burned, and in addition, it can be easily cleaned, so as to effectively prevent the overflow from being burned and dried to form the blackening of the connecting body.

In order to realize the gas supply of the outer ring gas mixing chamber, the method of directly connecting the gas with pipelines, or other methods in the prior art, the outer ring gas mixing chamber is supported by at least two spaced first supporting feet. Above the plate body, the first support leg is hollow, and the upper and lower ports of the first support leg are respectively connected to the outer ring gas mixing chamber and the outer ring gas channel. The support foot has a dual purpose function, on the one hand, it plays the role of supporting the outer ring gas mixing chamber, and on the other hand, it acts as a supply channel for the outer ring gas.

In order to leave more space for the base to supply the inner ring ejector tube and the outer ring ejector tube located in the first cavity, so that the inner ring ejector tube and The outer ring ejector tube can be made longer to effectively improve the ejection capacity. The outer ring gas channel is preferably arranged in a substantially "C" shape at the bottom of the base, and the base is on the periphery of the first cavity. There is a second cavity that is fluidly separated from the first cavity, and the outer periphery of the plate body extends in the horizontal direction and can cover the first cavity and form a connection to the outer ring gas mixing chamber. The outer ring gas channel, the plate body is provided with a second through hole communicating with the outer ring gas channel at the position corresponding to the first support foot, and the lower port of the first support foot is supported on the first support foot. on the top of the hole wall of the two through holes.

In order to better supply gas to the outer ring gas channel of which the bottom of the base is in a substantially "C" shape, the first concave cavity is provided with a first outer ring on both sides of the inner ring ejector tube. A ring ejector tube and a second outer ring ejector tube, the first outer ring ejector tube and the second outer ring ejector tube are connected with the outer ring gas channel, and the first outer ring ejector tube is The gas inlet end is fitted with a first outer ring nozzle, and the gas inlet end of the second outer ring injection pipe is fitted with a second outer ring nozzle. The first outer ring ejector pipe and the second outer ring ejector pipe are respectively used for gas supply through the outer ring gas channel.

In order to realize the connection between the outer ring gas mixing chamber and the inner ring gas mixing chamber, the outer ring gas mixing chamber includes an inner ring wall and an outer ring wall which are annular and concentrically spaced apart, and a connection connecting the inner ring wall and the outer ring wall The inner ring wall and the outer ring wall are covered with an outer ring fire cover, the connecting wall is provided with a third through hole that communicates with the outer ring gas channel, and the inner ring wall and the outer ring The ring walls are connected by at least two connecting ribs arranged at intervals in the circumferential direction.

In order to reduce the supply resistance of the secondary air to the inner ring flame and make the secondary air supply more quickly, the plate body is provided with an opening corresponding to the position of the first cavity, the opening is fitted with a cover plate, and the inner The annular air mixture chamber is supported on the cover plate through at least two spaced second support feet, and the cover plate is provided with a fourth passage communicating with the buffer cavity at a position corresponding to the second support feet. The lower end of the second support leg is supported on the top end of the hole wall of the fourth through hole. Since the inner ring air mixing chamber is also independently supported on the base, the secondary air can fully supplement the inner and outer periphery of the inner ring air mixing chamber at the same time.

In order to effectively supplement the secondary air to the inner circumference of the inner ring fire cover, the second support leg is hollow, is a part of the inner ring gas channel, and is formed together with the hole wall of the fourth through hole The inner ring gas channel.

Further, in order to facilitate installation, the two opposite inner side walls of the opening mouth extend downward to form the first upper wall portion and the second upper wall portion of the first outer ring ejection tube and the second outer ring ejection tube. , the upper tube wall of the inner ring ejection tube is located between the first upper wall part and the second upper wall part and connected to each other, the first outer ring ejection tube and the second outer ring ejection tube The lower wall portion and the second lower wall portion are integrally arranged with the first cavity, and the lower tube wall of the inner ring ejection tube is located between the first lower wall portion and the second lower wall portion and connected to each other.

In order to realize the fluid separation of the first cavity and the second cavity, the ends of the upper tube wall and the lower tube wall are formed as blind ends, the first upper wall part and the second upper wall part and the first lower wall part Both ends of the wall portion and the second lower wall portion are open ends.

In order to realize the inner and outer concentric fire of the inner ring fire cover, the inner ring fire cover includes an annular top wall and an inner wall extending vertically or obliquely downward from the inner side edge of the annular top wall and an outer side of the inner wall. The outer wall extending outward, the outer wall is in contact with the wall surface of the outer ring, the lower end surface of the outer wall is radially formed with a plurality of inner fire grooves around the circumferential direction, and a first partition is formed between adjacent inner fire grooves The first spacer is formed with a first flame stabilizing groove that is concave from the inside to the outside and is concave from the bottom to the top, and the first flame stabilizing groove has a first flame stabilizing hole near the outer side. At the same time, the flame generated by the first flame stabilizing groove can effectively pull the inner fire of the inner fire grooves on both sides, heat the gas root of the inner fire hole, and make the flame of the whole burner stable when burning.

In order to prevent overflow from entering the inner fire groove and the first flame stabilization hole, the annular top wall partially extends outward with a first waterproof eaves that cover the inner fire groove and the first flame stabilization hole.

In order to realize the different heights of the fire in the inner ring and the outer periphery of the inner ring fire cover and prevent mutual fire, the inner wall extends downward with a first lower ring portion, and the first lower ring portion rests on the inner ring wall surface. At least two inner fire holes communicated with the inner ring gas mixing chamber are arranged circumferentially and at intervals in the first lower ring portion, and the first lower ring portion is and the inner wall together to form an air supplementary cavity of the inner fire hole, and the air supplementary cavity is in fluid communication with the secondary air inlet channel.

Preferably, the inner fire hole includes a first inner fire hole and a second inner fire hole arranged in upper and lower rows, and the first inner fire hole penetrates the inner wall. The second inner fire hole can pull the root of the first inner fire hole.

In order to realize the inner and outer concentric fire of the outer ring fire cover, the outer ring fire cover includes a ring top wall and an inner ring wall extending vertically or obliquely downward from the inner and outer edges of the ring top wall and the inner ring wall. The outer ring wall extends outward from the outer side of the inner ring wall, the outer ring wall is in contact with the outer ring wall, the lower end surface of the outer ring wall is radially formed with a plurality of main fire grooves around the circumferential direction, and the adjacent A second spacer is formed between the main fire grooves. The second spacer is formed with a second flame stabilizing groove that is concave from the inside to the outside and is concave from the bottom to the top. The second flame stabilizing groove has a second flame stabilizing groove close to the outside. Two stable flame holes.

In order to prevent the overflow from entering the main fire groove and the second flame stabilization hole, the top wall of the ring partially extends outward with a second waterproof eaves that cover the main fire groove and the second flame stabilization hole.

In order to realize the different heights of the inner and outer fire of the outer ring fire cover and prevent mutual fire, a second lower ring portion extends downward from the inner ring wall, and the second lower ring portion rests on the inner ring and the inner ring. At least two outer fire holes communicated with the outer ring gas mixing chamber are circumferentially and spaced apart on the outer periphery of the ring wall and there is a space therebetween.

Preferably, the outer fire hole includes a first outer fire hole and a second outer fire hole arranged in upper and lower rows, and the first outer fire hole penetrates through the inner ring wall. The second outer fire hole can pull the root of the first outer fire hole.

Compared with the prior art, the advantage of the present invention lies in that the buffer cavity is arranged so that the primary air/gas mixture ejected from the gas outlet end of the inner ring ejection pipe has a buffer space, and the primary air after the buffer cavity is uniform is used for gas and gas mixing. The mixing of primary air prevents gas and primary air from colliding with each other in different directions, which further improves the uniformity of primary air and gas mixing, improves primary air inhalation rate, and also effectively reduces kinetic energy loss and makes it diffuse evenly , so that a stable and uniform flame can be maintained for the fire area supplied by the inner ring air mixing chamber to the inner ring fire cover, so that the flame of the upper air inlet burner is short, uniform and powerful, and there will be no defects such as yellow flame and tempering.

Description of drawings

1 is a schematic structural diagram of an upper air inlet burner in an embodiment of the present invention;

2 is a cross-sectional view of an embodiment of the present invention from an angle;

3 is a cross-sectional view of another angle of the embodiment of the present invention;

Fig. 4 is the exploded structure schematic diagram of Fig. 1;

5 is a schematic structural diagram of an angle of a connector in an embodiment of the present invention;

6 is a schematic structural diagram of another angle of the connector in the embodiment of the present invention;

7 is a schematic structural diagram of a base in an embodiment of the present invention;

8 is a schematic structural diagram of a cover plate in an embodiment of the present invention;

9 is a schematic structural diagram of an inner ring gas mixing chamber and an outer ring gas mixing chamber in an embodiment of the present invention;

10 is a schematic structural diagram of an inner ring fire cover in an embodiment of the present invention;

11 is a schematic structural diagram of an outer ring fire cover in an embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the embodiments of the accompanying drawings.

As shown in Figures 1 to 11, which are the best embodiments of the present invention, the upper air inlet burner can be applied to the traditional upper air inlet burner or to the Italian Sabaf burner in Europe, including the base 1, The base 1 has a first cavity 11 in the center; the connecting body 2 is arranged on the base 1, the connecting body 2 includes a plate 21, and the center of the plate 21 corresponds to the first cavity 11 with a vertical The inner ring gas channel 211 facing toward the inner ring and the inner ring gas mixing chamber 3 arranged above the inner ring gas channel 211. The inner ring gas mixing chamber 3 in this embodiment includes an inner ring wall surface 31 and an outer ring wall surface 31 which are annular and are arranged concentrically at intervals. The ring wall surface 32 and the bottom wall 33 connecting the inner ring wall surface 31 and the outer ring wall surface 32, the inner ring wall surface 31 and the outer ring wall surface 32 are covered with an inner ring fire cover 34, and the bottom wall 33 is provided with a connection with the inner ring gas channel 211. The first through hole 331 through the inner ring fire cover 34, wherein, in order to realize the inner and outer concentric fire of the inner ring fire cover 34, the inner ring fire cover 34 includes an annular top wall 341 and a vertical or The inner wall 342 extending obliquely downward and the outer wall 343 extending outward from the outer side of the inner wall 342, the outer wall 343 abuts against the outer ring wall surface 32, the lower end surface of the outer wall 343 is radially formed with a plurality of inner fire grooves 3431 around the circumferential direction, A first spacer 3432 is formed between the adjacent inner fire grooves 3431. The first spacer 3432 is formed with a first flame stabilization groove 3433 concave from the inside to the outside and from bottom to top. The first flame stabilization concave The groove 3433 has a first flame stabilizing hole 3435 near the outer side. The first flame stabilizing groove 3433 can slow down the gas outlet speed of the first flame stabilizing hole 3435. The inner fire of the fire groove 3431 heats the gas root of the inner fire hole, so that the flame of the entire inner ring fire cover 34 is stable when burning, and the annular top wall 341 partially extends outward to cover the inner fire groove 3431 and the first flame. The first waterproof canopy 3411 above the flame stabilization hole 3435 prevents the overflow from entering the inner fire groove 3431 and the first flame stabilization hole 3435 . In order to realize the different heights of the fire inside and outside the inner ring fire cover 34 and prevent mutual fire, the inner wall 342 extends downward with a first lower ring portion 3421, and the first lower ring portion 3421 rests on the inner ring wall surface 31. At the periphery and there is a space between the two, the first lower ring portion 3421 is circumferentially and spaced with at least two inner fire holes communicating with the inner ring gas mixture chamber 3, and the first lower ring portion 3421 is common with the inner wall 342. The air supplementary cavity 50 surrounding the inner fire hole is in fluid communication with the secondary air inlet channel 8 . The inner fire hole includes a first inner fire hole 3422 and a second inner fire hole 3423 arranged in upper and lower rows. The first inner fire hole 3422 passes through the inner wall 342, and the center fire formed by the second inner fire hole 3423 can pull the first inner fire hole. The root of the fire hole 3422.

In addition, in order to make the primary air/gas mixture of the inner ring fire cover 34 mix more evenly, the inner ring ejection pipe 4 is gradually inclined downward from top to bottom and is laterally arranged in the first cavity 11, and is connected with the plate body 21. A buffer cavity 5 is formed on the lower surface. The gas outlet end 41 located at the lower end of the inner ring ejector tube 4 is in fluid communication with the inner ring gas channel 211 through the buffer cavity 5. The gas inlet end 42 located at the upper end of the inner ring ejection tube 4 An inner ring nozzle 43 is fitted. Since the primary air/gas mixture ejected from the gas outlet end of the inner ring ejector pipe 4 passes through the buffer space with the buffer chamber 5, the primary air after the buffer chamber 5 is uniformly mixed with the primary air to avoid gas and primary air. They collide with each other due to the confluence of different directions, which further improves the uniformity of primary air and gas mixing, so that the flames of the inner and outer circles of the inner ring fire cover 34 are short, uniform and powerful, and no yellow flame or tempering will appear. and other defects. In order to solve the problem of supplying the secondary air in the inner fire groove 3431 located in the outer ring of the inner ring fire cover 34 and the inner fire hole located in the inner ring of the inner ring fire cover 34 in the present invention, the inner ring gas mixing chamber 3 is passed through independently. The two spaced second support feet 30 are supported on the plate body 21, so that the bottom circle of the inner ring air mixing chamber 3 is a secondary air inlet channel 8, and the secondary air inlet channel 8 supplies the inner ring. The larger amount of air in the inner and outer periphery is conducive to the full combustion of the inner ring, and also realizes easy cleaning, so as to effectively prevent the blackening of the plate body 21 of the connecting body 2 formed by the overflowing liquid being burned dry. In order to increase the amount of air supplied by the secondary air inlet channel 8 to the inner ring, there is another important determining factor: the outer ring air mixing chamber 6 is also independently supported, specifically, the inner ring air mixing chamber 3 is provided. The outer ring gas mixing chamber 6 on the periphery, the outer ring gas mixing chamber 6 is supported on the plate body 21 by at least two first supporting feet 7 arranged at intervals, and the gap between the outer ring gas mixing chamber 6 and the plate body 21 is formed inward A secondary air inlet channel 8 for supplementing air inside and outside the air mixing chamber 3 . The outer ring air mixing chamber 6 is independently supported by the first supporting feet 7, and the bottom circle of the outer ring air mixing chamber 6 is a secondary air inlet channel 8, and the secondary air inlet channel 8 supplies the inner ring with a larger amount of air. , which is conducive to the full combustion of the inner ring; and in order to realize the gas supply of the outer ring gas mixing chamber 6, the method of connecting the gas directly with the pipeline, or other methods in the prior art, the first supporting foot is used in this embodiment. The upper and lower ports of the first support leg 7 are connected with the outer ring gas mixing chamber 6 and the outer ring gas channel 60 in a hollow manner. The support foot has a dual purpose, on the one hand, it plays the role of supporting the outer ring gas mixing chamber 6, and on the other hand, it acts as a supply channel for the outer ring gas. In this embodiment, the base 1 is located in the first concave cavity. The periphery of 11 has a second cavity 12 that is fluidly separated from the first cavity 11, and the outer periphery 212 of the plate body 21 extends in the horizontal direction and can cover the first cavity 11 and form a connected outer ring gas mixing chamber The outer ring gas channel 60 of On the top of the hole wall of the hole 213, the outer ring ejector pipe that is supplied to the outer ring gas channel 60 is also arranged in the first cavity 11, and is located in the first cavity in order to leave more space for the base 1. The inner ring ejector tube 4 and the outer ring ejector tube in the cavity 11 make it possible to make the inner ring ejector tube 4 and the outer ring ejector tube longer without changing the overall height of the air inlet burner. To effectively improve the ejection capacity, the outer ring gas channel 60 is preferably arranged at the bottom of the base 1 in a substantially "C" shape; For the supply of gas, the first concave cavity 11 is provided with a first outer ring injection pipe 9 and a second outer ring injection pipe 10 on both sides of the inner ring injection pipe 4. The first outer ring injection pipe 9 The second outer ring ejector tube 10 is connected with the outer ring gas channel 60, the gas inlet end of the first outer ring ejector tube 9 is fitted with a first outer ring nozzle 91, and the inlet end of the second outer ring ejector tube 10 is fitted with a first outer ring nozzle 91. The gas port end is fitted with a second outer ring nozzle 101, preferably the injection ports of the first outer ring nozzle 91 and the second outer ring nozzle 101 are oblique injection, and the first outer ring ejection pipe 9 and the second outer ring ejection The pipes 10 are respectively provided with gas passages 60 in the outer ring to supply gas. The outer ring fire cover 64 of the present embodiment also adopts a ring-shaped design like the inner ring fire cover 34. The outer ring fire cover 64 includes a ring top wall 641 and a vertical or oblique downward extension from the inner edge of the ring top wall 641. The inner ring wall 642 and the outer ring wall 643 extending outward from the outer side of the inner ring wall 642, the outer ring wall 643 is in contact with the outer ring wall 62, and the lower end surface of the outer ring wall 643 is radially formed with a plurality of main rings around the circumferential direction. Fire grooves 6431, and a second spacer 6432 is formed between the adjacent main fire grooves 6431. The second spacer 6432 is formed with a second flame stabilization groove 6433 concave from the inside to the outside and from bottom to top. The second flame stabilizing groove 6433 has a second flame stabilizing hole 6434 near the outer side. The second flame stabilizing groove 6433 can slow down the gas outlet speed of the second flame stabilizing hole 6434. The second flame stabilizing groove 6433 has a second flame stabilizing hole 6433 The flame generated by the hole 6434 can effectively pull the outer peripheral main fire of the main fire grooves 6431 on both sides, and heat the gas root of the outer peripheral main fire, so that the flame of the entire outer ring fire cover 64 is stable when burning, and the ring top wall 641 partially faces the flame. There is a second waterproof eaves 6411 that cover the main fire groove 6431 and the second flame stabilizing hole 6434 to prevent overflow from entering the main fire groove 6431 and the second flame stabilizing hole 6434. In order to realize the outer ring fire cover 64 The heights of the inner and outer fires are different to prevent mutual fire. The inner ring wall 642 extends downward with a second lower ring portion 6421, and the second lower ring portion 6421 rests on the outer periphery of the inner ring wall 61 and between the two. There is a space between them, and the second lower ring portion 6421 is circumferentially and spaced with a plurality of outer fire holes communicating with the outer ring gas mixing chamber 6. The outer fire holes include the first outer fire holes 6422 and The second outer fire hole 6423, the first outer fire hole 6422 penetrates through the inner ring wall 61, and the outer ring formed by the second outer fire hole 6423 can pull the root of the first outer fire hole 6422.

In order to realize the integral connection of the outer ring gas mixing chamber 6 and the inner ring gas mixing chamber 3 independently supported on the plate body 21 , the outer ring gas mixing chamber 6 includes an inner ring wall 61 and an outer ring wall which are annular and concentrically spaced. 62 and the connecting wall 63 connecting the inner annular wall 61 and the outer annular wall 62, the inner annular wall 61 and the outer annular wall 62 are covered with an outer annular fire cover 64, and the connecting wall 63 is provided with a connecting wall 60 that communicates with the outer annular gas channel 60. In the third through hole 631, the inner ring wall 61 and the outer ring wall surface 32 are connected by a plurality of connecting ribs 64 arranged at intervals in the circumferential direction. In order to solve the problem of convenient installation of the upper air inlet burner, the plate body 21 is provided with an opening 210 at the position corresponding to the first cavity 11, the opening 210 is fitted with a cover plate 20, and the inner ring gas mixing chamber 3 passes through two intervals The second support foot 30 is supported on the cover plate 20, the cover plate 20 is provided with a fourth through hole 201 communicating with the buffer cavity 5 at the position corresponding to the second support foot 30, and the lower end of the second support foot 30 supports the On the top of the hole wall of the fourth through hole 201, the second support leg 30 is hollow and is a part of the inner ring gas channel 211, and together with the hole wall of the fourth through hole 201 forms the inner ring gas channel 211, wherein the first The first outer ring ejection tube 9 , the second outer ring ejection tube 10 and the inner ring ejection tube 4 are arranged in separate bodies, a part is integrally formed with the plate body 21 , and a part is integrally formed with the bottom of the base 1 , specifically the opening 210 The two opposite inner side walls of the inner ring extend downward to form the first upper wall portion 92 and the second upper wall portion 102 of the first outer ring ejection tube 9 and the second outer ring ejection tube 10. The pipe wall 44 is located between the first upper wall portion 92 and the second upper wall portion 102 and is connected to each other. The two lower wall portions 103 are integrally arranged with the first cavity 11, the lower tube wall 45 of the inner annular ejection tube 4 is located between the first lower wall portion 93 and the second lower wall portion 103 and connected to each other, and the inner annular ejection tube 4 The ends of the upper tube wall 44 and the lower tube wall 45 of the injection tube 4 are formed as blind ends, so as to realize the fluid separation of the first cavity 11 and the second cavity 12 , the first upper wall portion 92 and the second upper wall portion 102 And both ends of the first lower wall portion 93 and the second lower wall portion 103 are open ends, that is, one open end is connected to the outer ring nozzle, and the other open end is connected to the outer ring gas channel 60. The part 93 , the second lower wall part 103 and the lower tube wall 45 of the inner ring ejection tube 4 are connected to each other and are jointly defined in an integral arrangement with the first cavity 11 of the base 1 , so that the connecting body 2 When the cover is placed on the base 1, the first outer ring ejection tube 9, the second outer ring ejection tube 10 and the inner ring ejection tube 4 are all inclined in the first cavity 11, so that the first cavity The cavity 11 has a buffer space capable of buffering the primary air/gas mixture ejected from the gas outlet end of the inner ring ejection pipe 4 .

As mentioned above, the fuel gas and the mixed primary air and gas flow into the inner ring fire cover 34 and the secondary air supplements the inner and outer periphery of the inner ring fire cover 34 as follows. The inner ring ejector 4 uses the kinetic energy of the gas itself to inject The primary air is sent to the first cavity 11 for pre-mixing of primary air and gas, and finally is further mixed in the buffer chamber 5 and enters the inner ring gas mixing chamber 3 through the inner ring gas channel 211. The mixed primary air and gas are finally mixed. It flows out through the inner fire groove 3431 and the first flame stabilization hole 3435 of the inner ring fire cover 34, and is ignited together with the secondary air in the secondary air inlet channel 8 to form an inner ring fire, and the mixed primary air and gas flow from The first inner fire hole 3422 and the second inner fire hole 3423 flow out, and are ignited together with the secondary air of the external environment to form a center fire. At the same time, the mixed primary air and gas finally pass through the main fire recess of the outer ring fire cover 64. The groove 6431 and the second flame stabilization hole 6434 flow out and are ignited together with the secondary air in the external environment to form an outer ring fire, and the mixed primary air and gas flow out from the first outer fire hole 6422 and the second outer fire hole 6423 , and is ignited together with the secondary air of the secondary air inlet channel 8 to form an outer ring fire. In addition, the inner and outer fire heights of the inner ring fire cover 34 and the outer ring fire cover 64 are different to prevent mutual fire and achieve A true concentric four-ring fire.

Claims (18)

1. An upper air inlet burner, characterized by comprising:

a base (1) having a first cavity (11) in the centre;

the connecting body (2) is arranged on the base (1) and comprises a plate body (21), and a vertical inner ring gas channel (211) is arranged at the central position of the plate body (21) corresponding to the first cavity (11);

the gas mixing device comprises an inner ring gas mixing chamber (3) arranged above an inner ring gas channel (211), wherein the inner ring gas mixing chamber (3) comprises an inner ring wall surface (31) and an outer ring wall surface (32) which are annular and concentrically arranged at intervals and a bottom wall (33) connecting the inner ring wall surface (31) and the outer ring wall surface (32), an inner ring fire cover (34) covers the inner ring wall surface (31) and the outer ring wall surface (32), and the bottom wall (33) is provided with a first through hole (331) communicated with the inner ring gas channel (211); and

the inner ring injection pipe (4) is transversely arranged in the first concave cavity (11) from top to bottom in a gradually downward inclined mode, a buffer cavity (5) is formed in the lower surface of the plate body (21), an air outlet end (41) located at the lower end of the inner ring injection pipe (4) is in fluid communication with the inner ring fuel gas channel (211) through the buffer cavity (5), and an air inlet end (42) located at the upper end of the inner ring injection pipe (4) is matched with an inner ring nozzle (43).

2. The upper intake burner of claim 1, wherein: the air purifier also comprises an outer ring air mixing chamber (6) arranged at the periphery of the inner ring air mixing chamber (3), the outer ring air mixing chamber (6) is supported on the plate body (21), and a secondary air inlet channel (8) for supplementing air to the inner periphery and the periphery of the inner ring air mixing chamber (3) is formed between the outer ring air mixing chamber (6) and the plate body (21).

3. The upper intake burner of claim 2, wherein: the outer ring gas mixing chamber (6) is supported on the plate body (21) through at least two first supporting pins (7) arranged at intervals, the first supporting pins (7) are hollow, and the upper port and the lower port of each first supporting pin (7) are respectively communicated with the outer ring gas mixing chamber (6) and the outer ring gas channel (60).

4. The upper intake burner of claim 3, wherein: base (1) in the periphery of first cavity (11) have with first cavity (11) phase-independent second cavity (12), the periphery of plate body (21) then extends and can cover in the horizontal direction along (212) first cavity (11) and forms the intercommunication outer loop gas channel (60) of outer loop gas mixing chamber (6), plate body (21) are corresponding the position of first supporting leg (7) seted up with communicating second through-hole (213) of outer loop gas channel (60), the lower port of first supporting leg (7) supports promptly on the pore wall top of second through-hole (213).

5. The upper intake burner of claim 4, wherein: the gas inlet end of the first outer ring injection pipe (9) is adapted to a first outer ring nozzle (91), and the gas inlet end of the second outer ring injection pipe (10) is adapted to a second outer ring nozzle (101).

6. The upper intake air burner as claimed in any one of claims 2 to 5, wherein: the outer ring gas mixing chamber (6) comprises an inner ring wall (61) and an outer ring wall (62) which are annular and concentrically arranged at intervals and a connecting wall (63) for connecting the inner ring wall (61) and the outer ring wall (62), an outer ring fire cover (64) covers the upper portions of the inner ring wall (61) and the outer ring wall (62), a third through hole (631) communicated with the outer ring gas channel (60) is formed in the connecting wall (63), and the inner ring wall (61) is connected with the outer ring wall (32) through at least two connecting ribs (64) which are circumferentially arranged at intervals.

7. The upper intake burner of claim 5, wherein: the plate body (21) is provided with an opening (210) corresponding to the position of the first cavity (11), the opening (210) is provided with a cover plate (20) in a matched mode, the inner ring air mixing chamber (3) is supported on the cover plate (20) through at least two spaced second supporting legs (30), the cover plate (20) corresponds to the position of the second supporting legs (30) and is provided with a fourth through hole (201) communicated with the buffer cavity (5), and the lower end of the second supporting legs (30) is supported on the top end of the hole wall of the fourth through hole (201).

8. The upper intake burner of claim 7, wherein: the second supporting leg (30) is hollow and is a part of the inner ring gas channel (211), and the second supporting leg and the hole wall of the fourth through hole (201) jointly form the inner ring gas channel (211).

9. The upper intake burner of claim 7 or 8, wherein: two relative inside walls of opening (210) oral area extend downwards and form first upper wall portion (92) and second upper wall portion (102) that first outer ring draws and penetrates pipe (9) and second outer ring and draw and penetrate pipe (10), upper tube wall (44) that the inner ring draws penetrates pipe (4) then are located between first upper wall portion (92) and second upper wall portion (102) and interconnect, first outer ring draws first lower wall portion (93) and second lower wall portion (103) that penetrate pipe (9) and second outer ring draw and penetrate pipe (10) with first cavity (11) an organic whole sets up, lower tube wall (45) that the inner ring draws penetrates pipe (4) then are located between first lower wall portion (93) and second lower wall portion (103) and interconnect.

10. The upper intake burner of claim 9, wherein: the ends of the upper pipe wall (44) and the lower pipe wall (45) are formed as blind ends, and both ends of the first upper wall (92) and the second upper wall (102) and the first lower wall (93) and the second lower wall (103) are open ends.

11. The upper intake air burner as claimed in any one of claims 1 to 5, wherein: the inner ring fire cover (34) comprises an annular top wall (341), an inner wall (342) extending downwards from the inner side edge of the annular top wall (341) in a vertical or inclined mode, and an outer wall (343) extending outwards from the outer side of the inner wall (342), wherein the outer wall (343) abuts against an outer ring wall surface (32), a plurality of inner fire grooves (3431) are radially formed in the lower end surface of the outer wall (343) around the circumferential direction, a first spacer block (3432) is formed between the adjacent inner fire grooves (3431), a first flame stabilizing groove (3433) which is concave from inside to outside and from bottom to top is formed in the first spacer block (3432), and a first flame stabilizing hole (3435) is formed in the first flame stabilizing groove (3433) close to the outer side.

12. The upper intake burner of claim 11, wherein: the annular top wall (341) partially extends outwards to form a first waterproof brim (3411) which is shielded above the inner flame groove (3431) and the first flame stabilizing hole (3435).

13. The upper intake burner of claim 12, wherein: the inner wall (342) extends downwards to form a first lower ring part (3421), the first lower ring part (3421) is placed on the periphery of the inner ring wall surface (31) and has a gap, at least two inner fire holes communicated with the inner ring air mixing chamber (3) are circumferentially arranged on the first lower ring part (3421) at intervals, an air replenishing cavity (50) of the inner fire holes is formed by the first lower ring part (3421) and the inner wall (342) in a surrounding mode, and the air replenishing cavity (50) is communicated with the secondary air inlet channel (8) in a fluid mode.

14. The upper intake burner of claim 13, wherein: the inner fire holes comprise a first inner fire hole (3422) and a second inner fire hole (3423) which are arranged in an upper row and a lower row, and the first inner fire hole (3422) penetrates through the inner wall (342).

15. The upper intake burner of claim 6, wherein: the outer ring fire cover (64) comprises a ring top wall (641), an inner ring wall (642) extending downwards vertically or obliquely from the inner side edge of the ring top wall (641), and an outer ring wall (643) extending outwards from the outer side of the inner ring wall (642), wherein the outer ring wall (643) is abutted against the outer ring wall (62), a plurality of main fire grooves (6431) are radially formed on the lower end face of the outer ring wall (643) in the circumferential direction, second spacers (6432) are formed between the adjacent main fire grooves (6431), a second flame stabilizing groove (6433) which is concave from inside to outside and from bottom to top is formed on the second spacers (6432), and a second flame stabilizing hole (6434) is formed on the second flame stabilizing groove (6433) close to the outer side.

16. The upper intake burner of claim 15, wherein: and a second waterproof brim (6411) sheltering above the main fire groove (6431) and the second flame stabilizing hole (6434) extends outwards from part of the ring top wall (641).

17. The upper intake burner of claim 15 or 16, wherein: the inner ring wall (642) extends downwards to form a second lower ring part (6421), the second lower ring part (6421) is placed on the periphery of the inner ring wall (61) with a gap, and at least two outer fire holes communicated with the outer ring gas mixing chamber (6) are circumferentially arranged at intervals on the second lower ring part (6421).

18. The upper intake burner of claim 13, wherein: the outer fire holes comprise a first outer fire hole (6422) and a second outer fire hole (6423) which are arranged in an upper row and a lower row, and the first outer fire hole (6422) penetrates through the inner ring wall (61).

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