CN110873328A - A kind of burner - Google Patents

Abstract

The invention relates to a burner which comprises a shell (1) and a plurality of fire rows arranged in the shell (1), wherein each fire row is respectively connected with a corresponding injection pipe, and the shell (1) is also provided with a gas distribution pipe (3) and an ignition needle (61) which correspond to each injection pipe; the method is characterized in that: the fire row comprises a plurality of combustion fire rows (4) and a fire-leading fire row (5); the combustion fire rows (4) are sequentially arranged along the length direction of the shell, and an air channel (7) is formed by a gap between every two adjacent combustion fire rows; the ignition fire rows (5) are perpendicular to the combustion fire rows (4) and are arranged in the shell, and the lengths of the ignition fire rows (5) are matched with the length of the inner cavity of the shell so as to correspond to all the combustion fire rows; the ignition needle (6) is arranged corresponding to the ignition fire grate (5). The invention has the advantages of high fire transfer speed, sufficient combustion, high combustion efficiency and environmental protection, and improves the heating uniformity of the heat exchanger heated by the burner.

Description

a burner

technical field

The invention relates to the field of water heaters, in particular to a burner for water heaters.

Background technique

The existing water heater burner chamber box mainly includes a combustion chamber casing and fire rows arranged in the casing, each fire row is arranged in parallel in the combustion chamber casing, and there is a gap for air to pass between adjacent fire rows. A front pipe nozzle port is set at the inlet position of each fire row, and the fire row that is connected to the gas is selected through the solenoid valve and the front pipe selection mechanism, so as to control the combustion stage and obtain the heating effect of different stages.

The ignition needle of the burner is usually placed above the fire row at the head position. When the burner is working, the ignition needle will ignite the corresponding fire row, and the ignition of the remaining fire rows is carried out through the flame on the already ignited fire row. , and the switching between ranks needs to be guaranteed by fast and reliable fire transmission.

In order to pass the fire successfully or the speed of the fire to meet the requirements, the gap between the fire rows should be as small as possible; on the other hand, in order to make the gas burn fully, it is necessary to provide enough air to the flame, so that each fire row There must be enough space between them. The two form a pair of contradictions. The current burner obtains a balance between the two by losing a part of the fire transmission speed and a part of the air supplementary amount, but this design will also lose the constant temperature performance of the water heater; and once there is a slight structural change, it is easy to It can lead to the failure of fire transmission and even cause serious safety accidents.

Furthermore, due to the need for fire transmission, each stage needs to include the fire row corresponding to the ignition needle at the head end, which leads to the fact that each stage fire row is set on one side, and the temperature in the combustion chamber is very uneven, which affects the heat exchange. In addition, in order to ensure the air volume, the fan speed is relatively large when the small section is burning, but at this time, there is a large air inlet area without combustion, which causes this part of the air to be wasted.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a burner that can quickly transfer fire and fully burn without losing fire transfer speed and air supplementary amount according to the current state of the prior art, and the fire row on each stage can be relative to the water heater. The heat exchange tubes are evenly arranged to improve the uniformity of the heat exchange tubes.

The technical solution adopted by the present invention to solve the above technical problems is as follows: the burner includes a casing and a plurality of fire rows arranged in the casing, and each fire row is respectively connected to its corresponding ejection pipe, and the casing The body is also provided with a gas distribution pipe and an ignition needle corresponding to each of the ejection pipes;

It is characterized by:

The fire bars include a plurality of combustion fire bars and a pilot fire bar; the combustion fire bars are arranged in sequence along the length direction of the casing, and the gaps between adjacent combustion fire bars form air passages;

The ignition bars are arranged in the casing perpendicular to each of the combustion bars, and the length of the ignition bars is adapted to the length of the inner cavity of the housing to correspond to all the combustion bars;

The ignition pin is arranged in correspondence with the pilot ignition bank.

Considering the combustion stability, flame stabilizing wall panels may be provided on the opposite sides of the fire hole panels of each fire row, and the flame stabilizing wall panels are higher than the corresponding fire hole panels; A combustion chamber is formed between the two flame-stabilizing wall panels above, and a ignition chamber is thought to be between the two flame-stabilizing wall panels on the pilot fire row;

The flame stabilizing wall plate of the ignition bar facing the combustion bar is spaced with a plurality of ignition grooves facing each of the combustion bars, and the ignition grooves communicate with the combustion chamber on the combustion bar and the ignition bar. ignition chamber above.

The combustion fire rows in the above methods can be divided into multiple groups according to the design of the combustion section to obtain different heating effects; preferably, each of the combustion fire rows is divided into two groups, including a second fire row composed of a plurality of first combustion fire rows. A second group of combustion fire rows consisting of a group of combustion fire rows and a plurality of second combustion fire rows; each of the first combustion fire rows is stacked and arranged along the center of the inner cavity of the shell, and each first combustion fire row is connected with the The second combustion fire row is adjacent. The combustion fire row is divided into two groups to obtain three combustion stages, that is, it can meet the daily heating requirements of most water heaters, and the structure is simple and easy to process; at the same time, the first combustion fire row and the second combustion fire row The burner can evenly heat the corresponding heat exchanger at different stages, improving the heat balance of the heat exchanger.

Further, the second group of combustion fire rows may have an odd number of second combustion fire rows, wherein one second combustion fire row is arranged at the center of the inner cavity of the housing, and the rest of the second combustion fire rows are relative to each other. The central position of the inner cavity of the shell is symmetrically arranged.

Preferably, each of the first combustion bars can be evenly arranged in the inner cavity of the housing, and each of the second combustion bars can be evenly arranged in the inner cavity of the housing.

In each of the above solutions, the gas distribution pipe may have multiple structures. Preferably, the gas distribution pipe may include a main body and nozzles disposed on the main body and corresponding to each of the ejection pipes;

The main body is provided with an ignition channel that communicates with the ignition nozzles corresponding to the ignition ejector tubes, a first channel that communicates with the first nozzles corresponding to the first group of combustion fire bars, and a second group of combustion engines. a second channel connected to each of the second nozzles corresponding to the fire row;

The first channel, the second channel and the ignition channel are independent of each other;

The ignition channel is provided with a ignition solenoid valve, the first channel is provided with a first solenoid valve, and the second channel is provided with a second solenoid valve, and the ignition channel, the first channel and the second channel are connected and disconnected.

In order to facilitate the processing and assembly of components, preferably, the body may include a cover body and a base body, and there is a cavity between the cover body and the base body after they are connected to each other;

The first channel, the second channel and the ignition channel are arranged on the cover body; each of the nozzles is arranged on the base body;

Corresponding to the second nozzle, a plurality of annular first flanges are arranged on the inner side surface of the base body facing the cover body, and these first flanges are all sealed and connected to the inner side wall of the cover body, so that the inner cavity of the first flange is independent in the cavity;

The second passage communicates with the inner cavity of each of the first flanges, thereby communicating with each of the second nozzles;

The first channel on the cover communicates with each of the first nozzles through the cavity;

The pilot channel communicates with the pilot nozzle.

In order to facilitate the setting of the ignition nozzle, a bump can be formed on the upper edge of the base, and the ignition nozzle is arranged on the bump; the outlet direction of the ignition nozzle is perpendicular to the outlet direction of each combustion nozzle. ;

The first nozzle and the second nozzle are arranged in a row.

A pressure plate can also be arranged between the cover body and the base body; the pressure plate is provided with a first through hole corresponding to the first channel, a second through hole corresponding to the second channel, and a fire channel corresponding to the the pilot hole;

Each of the first flanges is sealingly connected to the pressing plate.

Further, an annular second flange may also be provided on the side wall of the base body facing the cover body, the second flange is sealingly connected to the pressing plate, and the inner cavity of the second flange is independent of The cavity communicates with the pilot channel and the pilot nozzle.

Further, a first sealing gasket may be provided between the pressing plate and the cover body, and a second sealing gasket may be provided between the pressing plate and the base body. In order to reduce the processing accuracy requirements of each component under the premise of ensuring the sealing of each channel.

Compared with the prior art, the burner provided by the present invention, through the design of the ignition ignition row, can simultaneously ignite each combustion ignition row, thereby breaking the centralized arrangement of each segment and the slow ignition speed caused by ignition in the prior art. The disadvantage is that the fire transmission speed is extremely fast, and the interval between adjacent fire rows can be designed according to the requirements of the ideal supplementary air to ensure the adequacy of combustion, improve the combustion efficiency, and reduce the emission of harmful substances; Air can be fully utilized and noise is reduced.

Description of drawings

FIG. 1 is a three-dimensional schematic diagram of an assembly structure according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of the embodiment of the present invention after omitting the gas distribution pipe and the front cover plate of the casing;

Fig. 3 is the three-dimensional schematic diagram of the assembling structure of the ignition ignition bar and ignition ejector tube in the embodiment of the present invention;

4 is a perspective view of the assembly structure of the combustion fire row and the combustion ejector tube in the embodiment of the present invention;

FIG. 5 is a three-dimensional schematic diagram of an assembly structure of a gas distribution pipe in an embodiment of the present invention;

Fig. 6 is the exploded schematic diagram of Fig. 5;

7 is a schematic perspective view of a substrate in an embodiment of the present invention;

FIG. 8 is a longitudinal cross-sectional view of FIG. 5 .

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 8, the burner includes:

The casing 1 is used to accommodate the burner fire row and the ejection pipe, and serves as the installation basis for other components. In this embodiment, the inner cavity of the casing 1 is roughly in the shape of a cuboid, and the upper end of the casing is open for flame combustion. The lower cover plate of the casing is provided with an air inlet 11 for a fan (not shown in the figure) to blow air into the casing.

There are two kinds of fire bars, which are arranged in the inner cavity of the casing, including combustion fire bars 4 and ignition fire bars 5 .

Among them, there are a plurality of combustion fire bars 4, which are arranged at intervals along the length direction of the inner cavity of the casing and parallel to the width direction of the casing; The passages are all connected to the air inlet 11 . The number of combustion fire rows can be set according to the specifications of the burner. There are eleven combustion fire rows in this embodiment, which are divided into two groups. The first group of combustion fire rows is composed of four first combustion fire rows 41. Each of the first combustion bars 41 is symmetrically arranged relative to the center position of the longitudinal direction of the inner cavity of the casing, and a second combustion bar 42 is provided between adjacent first combustion bars 41 .

The second group of combustion fire rows is composed of seven second combustion fire rows 42, one of which is located in the center of the inner cavity of the casing, and the remaining six second combustion fire rows 42 are symmetrically arranged relative to the central position of the inner chamber of the casing , so that the heat exchanger is heated evenly.

The second combustion fire rows are arranged at intervals from the first combustion fire rows, and one second combustion fire row may be arranged between adjacent first combustion fire rows, or two second combustion fire rows may be arranged.

There is one pilot fire row 5, which is arranged in the casing perpendicular to each combustion fire row 4. The length of the pilot fire row 5 is adapted to the length of the inner cavity of the casing, and is arranged against the side wall in the longitudinal direction of the casing to cover all the The burning fire row is easy to spread the fire.

The flame stabilizing wall panels 44 and 54 for stabilizing the flame are provided on the opposite side edges of the fire hole panels 43 and 53 of each fire row in the length direction. The flame stabilizing wall panels 44 and 54 are higher than the corresponding fire hole panels 43 , 53; the combustion chamber 45 is formed between the two flame-stabilizing wall panels on each combustion fire row, and the ignition chamber 55 is thought to be between the two flame-stabilizing wall panels on the pilot fire row.

A plurality of ignition grooves 52 are provided at intervals on the flame stabilization wall plate 52 of the ignition ignition bar 5 facing the combustion ignition bar 4 , and each ignition slot is respectively connected to the combustion chamber of the combustion ignition bar 4 corresponding to it.

The partitions 51 between adjacent fire pits block the air passages 7 between adjacent fire bars.

The ignition needle 61 and the flame sensing needle 62 are provided corresponding to the ignition ignition bank 5 .

Each fire row is connected to its corresponding ejector tube. Each of the first combustion bars 41 is respectively connected to the corresponding first combustion ejection tubes 211 , the second combustion bars 42 are respectively connected to the corresponding second combustion ejection tubes 212 , and the ignition bars are connected to the ignition ejection tubes 22 . .

The gas distribution pipe 3 is used to distribute the gas sent by the gas pipeline into each ejector pipe, and is arranged on the front cover plate of the casing or connected between the side plates on both sides of the casing; The body 35 corresponds to the nozzle 36 of each ejection tube. The nozzles 36 include four first nozzles 361 corresponding to each of the first ejector tubes, seven second nozzles 362 corresponding to each of the second ejector tubes, and pilot nozzles 363 corresponding to the pilot ejector tubes.

The body 35 includes a cover body 351 and a base body 352 that are butted against each other, and a cavity 37 is formed between the cover body 351 and the base body 352 after they are butted.

The cover body 351 is provided with a first channel 31, a second channel 32 and an ignition channel 33 that communicate with the gas pipeline; the first channel 31 is provided with a first solenoid valve (not shown in the figure), and the second channel 32 is provided with For the second solenoid valve (not shown in the figure), the ignition channel 33 is provided with an ignition solenoid valve 73 .

The nozzles are arranged on the base body 325, wherein the first combustion nozzle and the second combustion nozzle are arranged in a row corresponding to the combustion ejector tubes. The upper edge of the base body 352 is partially convex to form a bump 354 on which the ignition nozzle 363 is disposed, and the ignition nozzle 363 is perpendicular to each combustion nozzle.

Corresponding to the second nozzle 362, a plurality of annular first flanges 353 are provided on the inner surface of the base body 352 facing the cover body 351, and these first flanges 353 are sealed and connected to the inner side wall of the cover body 351 to isolate the cover body. In the cavity 37 between the body 351 and the body 352 , the second channel 32 communicates with the space enclosed by each of the first flanges 353 , thereby communicating with each of the second nozzles 362 .

The first channel 31 on the cover communicates with each of the first nozzles 361 through the cavity 37 .

The pilot passage 33 communicates with the pilot nozzle 363 .

In this embodiment, a pressing plate 355 is further arranged between the cover body 351 and the base body 352 , and the pressing plate 355 is provided with a first through hole 31 ′ corresponding to the first channel 31 and a second through hole 32 ′ corresponding to the second channel And the ignition through hole 33' corresponding to the ignition channel. Each of the first flanges is sealingly connected to the pressing plate 355 .

The side wall of the base body 352 facing the cover body 351 is further provided with an annular second flange 358 , the second flange 358 is sealedly connected with the pressing plate 355 , and the inner cavity of the second flange 358 is independent of the pressure plate 355 . The cavity 37 communicates with the ignition channel 33 and the ignition nozzle 22 .

A first gasket 356 and a second gasket 357 are respectively provided between the pressing plate 355 and the cover body 351 and between the pressing plate 355 and the base body 352 to further ensure the sealing requirements and reduce the machining accuracy of the parts.

When the burner is working, the control system of the burner opens the pilot solenoid valve, the first solenoid valve and/or the second solenoid valve, the gas enters the pilot nozzle through the pilot channel, and the air blown by the blower enters the pilot nozzle together with the gas in the pilot nozzle. In the injection tube, it is ejected from the pilot flame; the ignition needle ignites, igniting the gas ejected from the pilot flame.

At the same time, the gas is ejected from the gas nozzle, and the surrounding air is carried into the combustion ejection pipe, and is ejected from the combustion exhaust. The flames that have been ignited on the ignition burner ignite the gas on each combustion burner through each ignition slot, and each combustion burner is ignited at the same time, and the fire transmission speed is fast.

The pilot solenoid valve can be normally open or closed after the pilot is completed according to the design; closing the pilot solenoid valve helps to further improve the heating uniformity of the heat exchanger.

When the first solenoid valve is opened and the second solenoid valve is closed, the first group of combustion exhausts works, and the burner is in the first stage; the first solenoid valve is closed, the second solenoid valve is opened, and only the second group of combustion exhausts Work, the burner is in the second stage; when the first and second solenoid valves are opened at the same time, the combustion fire row is all working, and the burner is in the third stage.

Since the pilot fire bars cover all the combustion fire bars, the first fire bars in the first group of fire bars can be arranged relatively evenly along the length of the shell cavity; It can be arranged in this way so that the corresponding heat exchanger can be heated evenly; the air from each air channel can be fully utilized, and the noise of the fan can be effectively reduced; at the same time, the spacing between the fire exhausts can be based on the ideal air supply requirements. It is no longer limited by ignition; it makes the combustion more complete and the combustion efficiency is higher, greatly reduces the generation of incomplete combustion products such as NOx, and is environmentally friendly.

Claims (10)

1. A burner comprises a shell (1) and a plurality of fire rows arranged in the shell (1), wherein each fire row is connected with a corresponding injection pipe, and the shell (1) is also provided with a gas distribution pipe (3) and an ignition needle (61) corresponding to each injection pipe;

the method is characterized in that:

the fire row comprises a plurality of combustion fire rows (4) and a fire-leading fire row (5); the combustion fire rows (4) are sequentially arranged along the length direction of the shell, and an air channel (7) is formed by a gap between every two adjacent combustion fire rows;

the ignition fire rows (5) are perpendicular to the combustion fire rows (4) and are arranged in the shell, and the lengths of the ignition fire rows (5) are matched with the length of the inner cavity of the shell so as to correspond to all the combustion fire rows;

the ignition needle (6) is arranged corresponding to the ignition fire grate (5).

2. The burner according to claim 1, characterized in that the opposite two side edges of the fire hole panels (43, 53) of each fire row are provided with flame stabilizing wall plates (44, 54), and the flame stabilizing wall plates (44, 54) are higher than the corresponding fire hole panels (43, 53); a combustion cavity (45) is formed between the two flame stabilizing wall plates on each combustion fire row, and a fire ignition cavity (55) is formed between the two flame stabilizing wall plates on the fire ignition row;

the ignition fire row (5) is opposite to a flame stabilizing wall plate (54) of the combustion fire row (4), a plurality of ignition grooves (52) opposite to the combustion fire row (4) are arranged at intervals, and a combustion cavity (45) on the combustion fire row and an ignition cavity (55) on the ignition fire row are communicated through the ignition grooves (52).

3. A burner according to claim 1 or 2, characterized in that each of said rows (4) of burners is divided into two groups, comprising a first group of rows of burners consisting of a plurality of first rows (41) of burners and a second group of rows of burners consisting of a plurality of second rows (42) of burners; each first combustion fire row is stacked along the center of the inner cavity of the shell, and each first combustion fire row (41) is adjacent to a second combustion fire row (42).

4. A burner according to claim 3, wherein said second group of rows of burners has an odd number of second rows (42) of burners, one of said second rows of burners being disposed in a central position of the internal cavity of said housing, the remaining second rows of burners being symmetrically disposed with respect to the central position of the internal cavity of said housing.

5. Burner according to claim 3, characterized in that said gas distribution duct (3) comprises a body (35) and nozzles (36) arranged on said body (35) in correspondence of each of said ejection ducts;

the body (35) is provided with a pilot passage (33) communicated with the pilot nozzles (363) corresponding to the pilot injection pipes (21), a first passage (31) communicated with the first nozzles (361) corresponding to the first group of combustion fire rows, and a second passage (32) communicated with the second nozzles (362) corresponding to the second group of combustion fire rows;

the first channel (31), the second channel (32) and the ignition channel (33) are independent from each other;

the ignition channel (33) is provided with an ignition electromagnetic valve (73), the first channel (31) is provided with a first electromagnetic valve, the second channel (32) is provided with a second electromagnetic valve, and the ignition channel (33), the first channel (31) and the second channel (32) are switched on and off.

6. Burner according to claim 5, characterized in that said body (35) comprises a cover (351) and a base (352), said cover (351) and base (352) being butted with a cavity (37) therebetween;

the first channel (31), the second channel (32) and the priming channel (33) are arranged on the cover body (351); each nozzle (36) is arranged on the base body (352);

corresponding to the second nozzle (362), a plurality of annular first flanges (353) are arranged on the inner side surface of the base body (352) opposite to the cover body (351), and the first flanges (353) are hermetically connected with the inner side wall of the cover body (351) so that the inner cavities of the first flanges are independent of the cavity (37);

said second channel (32) communicating with the internal cavity of each first flange (353) and thus with each second nozzle (362);

a first channel (31) on the cover body is communicated with each first nozzle (361) through the cavity (37);

the ignition channel (33) is communicated with the ignition nozzle (363).

7. A burner according to claim 6, characterised in that the upper edge of the base body (352) is locally convex forming a projection (354), the pilot nozzle (363) being arranged on this projection (354); the outlet direction of the pilot nozzle (363) is perpendicular to the outlet direction of each combustion nozzle;

the first nozzles (361) and the second nozzles (362) are arranged in a row.

8. A burner according to claim 6, characterized in that a pressure plate (355) is further provided between the cover (351) and the base (352); the pressure plate (355) is provided with a first through hole (31 ') corresponding to the first channel (31), a second through hole (32 ') corresponding to the second channel and a firing through hole (33 ') corresponding to the firing channel;

each of the first flanges is sealingly connected to the pressure plate (355).

9. Burner according to claim 8, characterized in that a first gasket (356) is provided between the pressure plate (355) and the cover (351), and a second gasket (357) is provided between the pressure plate (355) and the base body (352).

10. A burner according to claim 9, characterized in that the base body (352) is provided with an annular second flange (358) on the side wall facing the cover body (351), the second flange (358) being sealingly connected to the pressure plate (355), the inner cavity of the second flange (358) being independent of the cavity (37) and communicating with the pilot channel (33) and the pilot nozzle (22).

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