CN110873328A

CN110873328A - A kind of burner

Info

Publication number: CN110873328A
Application number: CN201810997458.7A
Authority: CN
Inventors: 黄启彬; 秦刚
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2018-08-29
Filing date: 2018-08-29
Publication date: 2020-03-10

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 kind of burner

Technical Field

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

Background

The existing water heater combustor chamber box mainly comprises a combustor shell and fire rows arranged in the shell, wherein the fire rows are arranged in the combustor shell in parallel, and gaps for air to pass through are formed between the adjacent fire rows. The inlet position of each fire row is provided with a front pipe nozzle opening, and the fire row which is communicated with gas is selected through an electromagnetic valve and a front pipe selection mechanism, so that the combustion section position is controlled, and the heating effect of different section positions is obtained.

The ignition needle of combustor is usually placed in the top of the fire row of head position, and the combustor during operation, the ignition needle will be arranged the ignition of corresponding fire, and the ignition of other fire rows is arranged the flame through this fire that has igniteed and is passed a fire, and the switching between the section position needs be guaranteed by quick, reliable passing a fire.

If the fire transfer is successful or the fire transfer speed meets the requirement, the gaps among the fire rows are required to be as small as possible; on the other hand, however, in order to achieve sufficient gas combustion, a sufficient amount of air must be supplied to the flame, and thus a sufficient space must be provided between each fire row. These two form a pair of contradictions. The existing burner obtains the balance between the two by losing a part of the flame transfer speed and losing a part of air supplement amount, but the constant temperature performance of the water heater is also lost when the burner is designed in such a way; and once a tiny structural change exists, fire transmission failure is easily caused, and even serious safety accidents are caused.

Moreover, because of the need of fire transmission, each section needs to include a fire row corresponding to the ignition needle at the head end position, so that each section of fire row is arranged close to one side edge, the temperature in the combustion chamber is very uneven, and the service life of the heat exchanger and the pollutant content of the flue gas are influenced; and in order to guarantee the air quantity, when the small section position burns, the rotating speed of the fan is larger, but a large air inlet area does not burn at the moment, so that the air is wasted.

Disclosure of Invention

The invention aims to solve the technical problem of providing a burner which can quickly transfer fire and fully burn without losing fire transfer speed and air supplement amount aiming at the current situation of the prior art, and fire rows on each section can be uniformly arranged relative to a heat exchange tube of a water heater so as to improve the uniformity of the heat exchange tube in heating.

The technical scheme adopted by the invention for solving the technical problems is as follows: the burner comprises a shell and a plurality of fire rows arranged in the shell, wherein each fire row is respectively connected with a corresponding injection pipe, and the shell is also provided with a gas distribution pipe and an ignition needle corresponding to each injection pipe;

the method is characterized in that:

the fire row comprises a plurality of combustion fire rows and a fire-igniting fire row; the combustion fire rows are sequentially arranged along the length direction of the shell, and gaps between adjacent combustion fire rows form air channels;

the ignition fire rows are perpendicular to the combustion fire rows and arranged in the shell, and the lengths of the ignition fire rows 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 is arranged corresponding to the ignition fire row.

In consideration of combustion stability, flame stabilizing wallboards can be arranged on two opposite side edges of the fire hole panels of each fire row, and the flame stabilizing wallboards are higher than the corresponding fire hole panels; a combustion cavity is formed between the two flame stabilizing wall plates on each combustion fire grate, and a fire ignition cavity is formed between the two flame stabilizing wall plates on the fire ignition grate;

the ignition fire row is opposite to the flame stabilizing wallboard of the combustion fire row, a plurality of ignition grooves opposite to the combustion fire row are arranged at intervals, and the combustion cavity on the combustion fire row and the ignition cavity on the ignition fire row are communicated through the ignition grooves.

The combustion fire rows in the methods can be divided into a plurality of groups according to the design of the combustion section positions so as to obtain different heating effects; preferably, each combustion fire row is divided into two groups, and comprises a first group of combustion fire rows consisting of a plurality of first combustion fire rows and a second group of combustion fire rows consisting of a plurality of second combustion fire rows; each first combustion fire row is stacked along the center of the inner cavity of the shell and is adjacent to the second combustion fire row. The combustion fire rows are divided into two groups, three combustion section positions are obtained, the daily heating requirements of most water heaters can be met, and the water heater is simple in structure and convenient to process; simultaneously arrange first burning fire row and second burning fire row interval setting for the heat exchanger that the combustor can both the uniform heating correspond when different section positions, improve the equilibrium that the heat exchanger was heated.

Further, the second group of combustion fire rows can have an odd number of second combustion fire rows, wherein one second combustion fire row is arranged in the center of the inner cavity of the shell, and the rest second combustion fire rows are symmetrically arranged relative to the center of the inner cavity of the shell.

Preferably, each first combustion fire row can be uniformly arranged in the inner cavity of the shell, and each second combustion fire row is uniformly arranged in the inner cavity of the shell.

In each of the above solutions, the structure of the gas distribution pipe may be multiple, preferably, the gas distribution pipe may include a body and nozzles disposed on the body and corresponding to the injection pipes;

the body is provided with a pilot passage communicated with pilot nozzles corresponding to the pilot injection pipes, a first passage communicated with each first nozzle corresponding to the first group of combustion fire rows and a second passage communicated with each second nozzle corresponding to the second group of combustion fire rows;

the first channel, the second channel and the ignition channel are mutually independent;

the ignition channel is provided with an ignition electromagnetic valve, the first channel is provided with a first electromagnetic valve, the second channel is provided with a second electromagnetic valve, and the ignition channel, the first channel and the second channel are switched on and off.

In order to facilitate the processing and assembly of parts, the body can comprise a cover body and a base body, and a cavity is formed between the cover body and the base body after the cover body and the base body are butted;

the first channel, the second channel and the ignition channel are arranged on the cover body; each nozzle 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 opposite to the cover body, and the first flanges are hermetically connected with the inner side wall of the cover body, so that the inner cavity of each first flange is independent of the cavity;

the second channel is communicated with the inner cavity of each first flange so as to be communicated with each second nozzle;

the first channel on the cover body is communicated with the first nozzles through the cavity;

the ignition channel is communicated with the ignition nozzle.

In order to facilitate the arrangement of the ignition nozzle, a lug can be formed on the upper edge of the base body in a protruding mode, and the ignition nozzle is arranged on the lug; the outlet direction of the pilot burner is vertical to the outlet direction of each combustion nozzle;

the first and second nozzles are arranged in a row.

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

each first flange is connected with the pressure plate in a sealing mode.

Furthermore, an annular second flange can be further arranged on the side wall, facing the cover body, of the base body, the second flange is connected with the pressing plate in a sealing mode, and an inner cavity of the second flange is independent of the cavity and is communicated with the ignition channel and the ignition nozzle.

Further, a first sealing gasket may be disposed between the pressing plate and the cover, and a second sealing gasket may be disposed between the pressing plate and the base. On the premise of ensuring the sealing performance of each channel, the requirement on the processing precision of each part is reduced.

Compared with the prior art, the combustor provided by the invention can simultaneously ignite each combustion fire row through the design of the ignition fire row, the defects of concentrated arrangement of each section and low ignition speed caused by ignition in the prior art are overcome, the ignition speed is extremely high, and the interval between the adjacent fire rows can be designed according to the requirement of ideal supplementary air, so that the combustion sufficiency is ensured, the combustion efficiency is improved, and the emission of harmful substances is reduced; meanwhile, the supplemented air can be fully utilized, and the noise is reduced.

Drawings

FIG. 1 is a perspective view 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 without the gas distribution pipe and the front cover plate of the housing;

FIG. 3 is a schematic perspective view of an assembly structure of a pilot fire row and a pilot fire injection pipe in the embodiment of the invention;

FIG. 4 is a schematic perspective view of an assembly structure of a combustion fire grate and a combustion ejector pipe according to an embodiment of the present invention;

FIG. 5 is a perspective view of an assembly structure of a gas distribution pipe according to an embodiment of the present invention;

FIG. 6 is an exploded view of FIG. 5;

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

fig. 8 is a longitudinal sectional view of fig. 5.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 8, the burner includes:

casing 1 for the holding combustor fire row with draw the ejector pipe to as the installation basis of other parts, the inner chamber of casing 1 is roughly the cuboid structure in this embodiment, and the casing upper end is uncovered, supplies the flame burning, is equipped with air intake 11 on the lower apron of casing, and the air feed machine (not shown in the figure) is to the interior blast air of casing.

The fire row is arranged in the inner cavity of the shell and comprises two types, namely a combustion fire row 4 and a fire-leading fire row 5.

The plurality of combustion fire rows 4 are sequentially arranged at intervals along the length direction of the inner cavity of the shell and are parallel to the width direction of the shell; the space between adjacent burning fire rows forms air passages 7 for secondary air supply, and each air passage is communicated with an air inlet 11. The quantity that the burning fire was arranged can be set up according to the specification of combustor, and the burning fire in this embodiment is arranged has eleven, divide into two sets of, and first group burning fire is arranged and is become by four first burning fire 41 groups, and these four first burning fire arrange 41 for the central point of the length direction of casing inner chamber puts the symmetrical arrangement, is equipped with second burning fire 42 between the adjacent first burning fire arrange 41.

The second group of combustion fire rows consists of seven second combustion fire rows 42, one second combustion fire row is positioned in the center of the inner cavity of the shell, and the other six second combustion fire rows 42 are symmetrically arranged relative to the center of the inner cavity of the shell, so that the heat exchanger is uniformly heated.

The second burning fire row and the first burning fire row are arranged at intervals, one second burning fire row can be arranged between the adjacent first burning fire rows, and two second burning fire rows can also be arranged.

The ignition fire row 5 is provided with one ignition fire row, the ignition fire row is perpendicular to each combustion fire row 4 and is arranged in the shell, the length of the ignition fire row 5 is matched with the length of the inner cavity of the shell and is arranged by being attached to the side wall of the shell in the length direction, so that all the combustion fire rows are covered, and fire transfer is facilitated.

Flame stabilizing

wall plates

44 and 54 for stabilizing flames are arranged on two opposite side edges of the

fire hole panels

43 and 53 of each fire row in the length direction, and the flame stabilizing

wall plates

44 and 54 are higher than the corresponding

fire hole panels

43 and 53; a combustion cavity 45 is formed between the two flame stabilizing wall plates on each combustion fire row, and a pilot cavity 55 is formed between the two flame stabilizing wall plates on the pilot fire row.

The flame stabilizing wall plate 52 of the ignition row 5 facing the combustion row 4 is provided with a plurality of ignition grooves 52 at intervals, and each ignition groove is respectively communicated with the combustion cavity of the corresponding combustion row 4.

The partition plate 51 between adjacent ignition slots blocks the air passage 7 between adjacent fire rows.

The ignition needle 61 and the flame sensing needle 62 are disposed corresponding to the pilot fire row 5.

Each fire row is connected with the corresponding injection pipe. The first combustion fire rows 41 are respectively connected with the corresponding first combustion injection pipes 211, the second combustion fire rows 42 are respectively connected with the corresponding second combustion injection pipes 212, and the pilot fire row is connected with the pilot fire injection pipe 22.

The gas distribution pipe 3 is used for distributing gas sent by the gas pipeline into each injection pipe, and is arranged on a front side cover plate of the shell or connected between side plates on two sides of the shell; comprises a body 35 and a nozzle 36 arranged on the body 35 and corresponding to each injection pipe. The nozzle 36 includes four first nozzles 361 corresponding to the respective first ejector pipes, seven second nozzles 362 corresponding to the respective second ejector pipes, and a pilot nozzle 363 corresponding to the pilot ejector pipe.

The body 35 includes a cover 351 and a base 352 that are mated to each other, with a cavity 37 between the cover 351 and the base 352.

The cover body 351 is provided with a first channel 31, a second channel 32 and a fire guiding channel 33 which are communicated with a gas pipeline; the first passage 31 is provided with a first solenoid valve (not shown), the second passage 32 is provided with a second solenoid valve (not shown), and the pilot passage 33 is provided with a pilot solenoid valve 73.

The nozzles are disposed on the base 325, wherein the first and second combustion nozzles are arranged in a row corresponding to the combustion ejector tube. The upper edge of the base 352 is partially convex to form a projection 354, and a pilot nozzle 363 is provided on this projection 354, the pilot nozzle 363 being perpendicular to the respective combustion nozzle.

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, the first flanges 353 are hermetically connected with the inner side wall of the cover body 351 to isolate the cavity 37 between the cover body 351 and the base body 352, and the second channel 32 is communicated with the space surrounded by the first flanges 353 so as to be communicated with the second nozzles 362.

The first channel 31 of 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 pressure plate 355 is further disposed between the cover 351 and the base 352, and the pressure plate 355 is provided with a first through hole 31 ' corresponding to the first passage 31, a second through hole 32 ' corresponding to the second passage, and a priming through hole 33 ' corresponding to the priming passage. Each first flange is sealingly connected to a pressure plate 355.

An annular second flange 358 is further disposed on a side wall of the base 352 opposite to the cover 351, the second flange 358 is hermetically connected to the pressing plate 355, and an inner cavity of the second flange 358 is independent from the cavity 37 and communicates with the ignition passage 33 and the ignition nozzle 22.

A first gasket 356 and a second gasket 357 are respectively arranged between the pressing plate 355 and the cover 351 and between the pressing plate 355 and the base 352, so as to further ensure the sealing requirement and reduce the machining precision of parts.

When the burner works, a control system of the burner opens a pilot electromagnetic valve, a first electromagnetic valve and/or a second electromagnetic valve, fuel gas enters a pilot nozzle through a pilot channel, and air blown by a blower enters a pilot injection pipe along with the fuel gas in the pilot nozzle and is discharged from the pilot injection pipe; the ignition needle is ignited to ignite the ignition fire to discharge the sprayed gas.

Meanwhile, the fuel gas is sprayed out from the fuel gas nozzle, enters the combustion ejector pipe together with surrounding air, and is sprayed out from the combustion fire. The ignited flame on the ignition fire row ignites the gas on each combustion fire row through each ignition groove, each combustion fire row is ignited simultaneously, and the fire transfer speed is high.

The ignition electromagnetic valve can be normally opened or closed after ignition is finished according to design; and the pilot electromagnetic valve is closed, so that the heating uniformity of the heat exchanger is further improved.

When the first electromagnetic valve is opened and the second electromagnetic valve is closed, the first group of combustion fire grate works, and the combustor is positioned at a first section; the first electromagnetic valve is closed, the second electromagnetic valve is opened, only the second group of combustion fire grate works, and the combustor is located at a second section; when the first electromagnetic valve and the second electromagnetic valve are opened simultaneously, the combustion fire grate works completely, and the combustor is in a third section position.

Because the ignition fire rows cover all the combustion fire rows, each first combustion fire row in the first group of combustion fire rows can be relatively uniformly arranged along the length direction of the cavity of the shell; similarly, each second combustion fire row can be arranged in such a way that the corresponding heat exchanger can be uniformly heated; the air from each air channel can be fully utilized, and the noise of the fan is effectively reduced; meanwhile, the space between the fire rows can be designed according to the ideal air supplement requirement, and is not limited by ignition any more; the combustion is more sufficient, the combustion efficiency is higher, the generation of incomplete combustion products such as NOx is greatly reduced, and the environment is protected.

Claims

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).