CN218972655U

CN218972655U - Combustor and gas water heater

Info

Publication number: CN218972655U
Application number: CN202223404855.XU
Authority: CN
Inventors: 卢楚鹏; 顾玉强; 陈露; 孙颖楷
Original assignee: Guangdong Vanward New Electric Co Ltd
Current assignee: Guangdong Vanward New Electric Co Ltd
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-05-05
Anticipated expiration: 2032-12-19

Abstract

The utility model belongs to the technical field of heat supply, and particularly discloses a combustor and a gas water heating device. The burner comprises a base, a flow equalizing cylinder, a flow dividing valve and a porous medium shell; a main flow channel for circulating mixed gas is arranged in the base; the flow equalizing cylinder is arranged on the base, a first cavity and a second cavity are respectively arranged in the flow equalizing cylinder, a plurality of air outlet holes communicated with the first cavity or the second cavity are arranged on the flow equalizing cylinder, and the first cavity and the second cavity are respectively communicated with the main runner; the flow dividing valve is detachably connected to the base and arranged between the main flow passage and the second cavity and is used for selectively communicating the main flow passage and the second cavity; the porous medium shell is sleeved outside the flow equalizing cylinder and at least covers the air outlet. The burner disclosed by the utility model cancels the structure of the mixing cavity, has a relatively simple overall structure, is easy to process and manufacture, optimizes the combustion performance, reduces the pollutant emission and expands the load regulation ratio. The gas water heater has the burner, stable combustion performance and low pollutant discharge.

Description

Combustor and gas water heater

Technical Field

The utility model relates to the technical field of heat supply, in particular to a combustor and a gas water heating device.

Background

The burner is a device for burning the mixture of gas and air, and is a key component of heating equipment such as a water heater, a wall-mounted furnace and the like. In order to meet the installation space requirements of different heating equipment, the burner is divided into a plurality of structures such as a cylinder shape, a box body shape and the like; meanwhile, in order to improve the load regulation ratio of the burner, the problem of overhigh temperature rise of small load of the whole machine is solved by the full premix cylindrical burner with multi-layer sectional combustion in the prior art.

However, in order to achieve effective combustion, if a mixing cavity is required to be arranged to enable air and fuel gas to be fully mixed, the multi-layer sectional combustion structure of the existing full-premix cylindrical combustor is complex and imperfect in structural arrangement, and has the phenomena of poor combustion such as flame separation and tempering and the like which are easy to occur, combustion is unstable, pollutant emission is high, and furthermore, the mixing ratio requirements of the full-premix cylindrical combustor on the air and the fuel gas are severe, so that the limitation on the load regulation ratio range of the full-premix cylindrical combustor is increased to a certain extent.

Disclosure of Invention

One of the technical problems to be solved by the present utility model is to provide a burner which can simplify the overall structure of the burner, is easy to manufacture, optimizes the combustion performance and reduces the pollutant emission, and enlarges the load regulation ratio.

The second technical problem to be solved by the utility model is to provide a gas water heating device which comprises the burner, so that the load regulation ratio of the gas water heating device is improved, and the gas water heating device has stable combustion performance and lower pollutant emission.

The first technical problem is solved by the following technical scheme:

there is provided a burner comprising:

the base is internally provided with a main runner, and the main runner is used for circulating mixed gas;

the flow equalizing barrel is arranged on the base, a first cavity and a second cavity are respectively arranged in the flow equalizing barrel, a plurality of air outlet holes which are communicated with the first cavity or the second cavity are arranged on the flow equalizing barrel, and the first cavity and the second cavity are respectively communicated with the main flow channel;

the flow dividing valve is detachably connected to the base and arranged between the main runner and the second cavity, and is used for selectively communicating the main runner with the second cavity;

the porous medium shell is sleeved outside the flow equalizing cylinder and at least covers the air outlet holes.

Compared with the background technology, the burner provided by the utility model has the following beneficial effects: the porous medium shell sleeved outside the flow equalizing cylinder realizes the full mixing of the mixed gas in the first cavity and the second cavity, reduces the requirement on the mixing ratio of air and gas, can save the mixing cavity of the full-premixing cylindrical burner and relatively simplifies the whole structure; meanwhile, by utilizing the advantages of the porous medium shell, such as good radiation effect, strong heat conduction performance and outstanding convection effect, the upstream mixed gas can be preheated, so that the combustion speed is improved; the mixed gas shuttles in the pores of the porous medium shell, so that the combustion is more stable, the phenomena of poor combustion such as flame separation, tempering and the like are avoided, the pollutant emission is lower, and the performance of the burner is optimized. The flow dividing valve is detachably connected to the base and arranged between the main flow passage and the second cavity, and is used for selectively communicating the main flow passage and the second cavity, and when a large load is required, the flow dividing valve is opened to conduct the main flow passage and the second cavity; when low-load low-temperature combustion is needed, the flow dividing valve is closed to separate the main flow passage from the second cavity, so that sectional combustion is realized, the load regulation ratio is enlarged, and the user requirement is met.

In one embodiment, the second cavity is disposed above the first cavity, and the burner further includes a partition connected to the flow equalizing cylinder to divide the flow equalizing cylinder into the first cavity and the second cavity.

In one embodiment, the base comprises a mounting seat, an upper plate and a lower plate which are oppositely arranged, the main runner is formed between the upper plate and the lower plate, the upper plate is provided with an air outlet of the main runner, the mounting seat is arranged at the air outlet and connected with the lower plate, the air outlet is divided into a first flow port and a second flow port, the first flow port is communicated with the first cavity, and the second flow port is communicated with the second cavity.

In one embodiment, a split flow channel is disposed in the mounting seat, and the mounting seat is connected to the partition, so that two ends of the split flow channel are respectively communicated with the second circulation port and the second cavity.

In one embodiment, the valve body of the diverter valve is connected to the lower plate, and the valve core of the diverter valve can abut against the mounting seat to block the diverter channel.

In one embodiment, the partition comprises a drainage tube and a partition plate arranged on the periphery of the drainage tube in a surrounding mode, the partition plate is connected with the inner wall of the flow equalization tube, a drainage cavity is arranged in the drainage tube, one end, away from the partition plate, of the drainage tube is connected with the mounting seat, and two ends of the drainage cavity are respectively communicated with the second cavity and the flow diversion channel.

In one embodiment, the burner further comprises a heat insulation cotton layer, the heat insulation cotton layer covers the base, and one end of the porous medium shell abuts against the heat insulation cotton layer.

In one embodiment, the burner further comprises a fixing clip, wherein a fixing groove is formed in one end, far away from the base, of the flow equalizing barrel, and the fixing clip is clamped in the fixing groove so as to press the porous medium shell against the base.

In one embodiment, the burner further comprises an ignition assembly connected to the base, the ignition needle of the ignition assembly facing the porous media housing.

The second technical problem is solved by the following technical scheme:

a gas water heating device is provided, comprising the burner.

Compared with the background technology, the gas water heating device has the following beneficial effects: the gas water heating device realizes the full mixing of the mixed gas in the first cavity and the second cavity through the porous medium shell of the burner, reduces the requirement of the gas water heating device on the mixing ratio of air and gas, can dispense with a mixing cavity, and relatively simplifies the overall structure of the gas water heating device; moreover, the gas water heating device can realize sectional stable combustion through the burner, the pollutant emission is lower, the load regulation ratio is larger, and the use requirement of a user is met.

Drawings

FIG. 1 is a schematic view of a burner according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a burner provided in an embodiment of the present utility model;

FIG. 3 is an enlarged schematic view of a portion A of FIG. 2;

FIG. 4 is a cross-sectional view of a base provided by an embodiment of the present utility model;

FIG. 5 is a schematic view illustrating a disassembled structure of a combustor according to an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a burner according to an embodiment of the present utility model.

Description of the reference numerals:

1. a base; 11. a main flow passage; 111. a primary flowpath inlet; 112. an air outlet; 1121. a first flow port; 1122. a second flow port; 12. a mounting base; 121. a shunt channel; 122. an inlet; 13. an upper plate; 14. a lower plate; 2. a flow equalizing cylinder; 20. an air outlet hole; 21. a first cavity; 22. a second cavity; 23. an upper flow equalizing cylinder; 24. a lower flow equalizing cylinder; 25. a fixing groove; 3. a diverter valve; 31. a valve body; 32. a valve core; 4. a porous media housing; 5. a partition; 51. a drainage cavity; 52. a drainage tube; 53. a partition plate; 6. a heat insulation cotton layer; 7. a fixing clip; 8. a flow equalizing baffle plate; 81. a flow guiding surface; 9. an ignition assembly; 91. an ignition needle.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

As shown in fig. 1 to 6, the burner comprises a base 1, a flow equalizing barrel 2, a flow dividing valve 3 and a porous medium housing 4. A main flow passage 11 is provided in the base 1, the main flow passage 11 for circulating a mixed gas, and the main flow passage 11 is provided with a main flow passage intake port 111 for communicating with a mixed gas supply structure (not shown in the drawings). The flow equalizing barrel 2 is connected to the base 1, a first cavity 21 and a second cavity 22 which are mutually separated are arranged in the flow equalizing barrel 2, a plurality of air outlet holes 20 are formed in the flow equalizing barrel 2, the air outlet holes 20 are communicated with the first cavity 21 or the second cavity 22, and the first cavity 21 and the second cavity 22 are respectively communicated with the main runner 11; part of the plurality of air outlet holes 20 can be communicated with the first cavity 21 and part of the plurality of air outlet holes can be communicated with the second cavity 22, so that the mixed gas in the main flow channel 11 is respectively introduced into the porous medium shell 4. The porous medium shell 4 is sleeved outside the flow equalizing cylinder 2. The mixed gas in the main runner 11 can enter the first cavity 21 and the second cavity 22 respectively and enter the porous medium shell 4 through the air outlet holes 20, and rich pores are formed in the porous medium shell 4, so that the mixed gas shuttles in the pores, and the air and the gas are fully mixed, so that the full combustion is realized, the mixing cavity of the full-premixing cylindrical burner can be omitted, and the overall structure is relatively simplified. The flow dividing valve 3 is detachably connected to the base 1 and is arranged between the main flow passage 11 and the second cavity 22, and the flow dividing valve 3 is used for selectively communicating the main flow passage 11 with the second cavity 22; when a large load is required, the flow dividing valve 3 is opened to conduct the main flow passage 11 and the second cavity 22; when low-load low-temperature combustion is required, the flow dividing valve 3 is closed to separate the main flow passage 11 from the second cavity 22, so that the sectional combustion of the combustor is realized, and the requirements of users are met. The flow dividing valve 3 may employ a solenoid valve, and the present embodiment is not particularly limited.

According to the burner provided by the embodiment of the utility model, the porous medium shell 4 sleeved outside the flow equalizing cylinder 2 is used for realizing the full mixing of the mixed gas in the first cavity 21 and the second cavity 22, so that the requirement on the mixing ratio of air and fuel gas is reduced, the mixing cavity and other parts of the full-premix cylindrical burner can be omitted, and the overall structure is relatively simplified; meanwhile, by utilizing the characteristics of larger porosity and stronger heat storage capacity of the porous medium shell 4, the device has the advantages of good radiation effect, strong heat conduction performance and outstanding convection effect, and can preheat the upstream mixed gas so as to improve the combustion speed; the mixed gas shuttles in the pores of the porous medium shell 4, so that the combustion is more stable, the phenomena of poor combustion such as flame separation, tempering and the like are avoided, the pollutant emission is lower, and the performance of the burner is optimized. The diverter valve 3 is detachably connected to the base 1 and is arranged between the main runner 11 and the second cavity 22, the diverter valve 3 is used for selectively communicating the main runner 11 and the second cavity 22, and when a large load is required, the diverter valve 3 is opened to conduct the main runner 11 and the second cavity 22; when low-load low-temperature combustion is required, the flow dividing valve 3 is closed to separate the main flow passage 11 from the second cavity 22, so that sectional combustion is realized, and the load regulation ratio is enlarged.

It should be noted that, when a larger load adjustment ratio is required, this may be achieved by stacking a plurality of the burners of the present embodiment in multiple layers in the axial direction; the multilayer porous medium shell 4 can also be sleeved outside the flow equalizing barrel 2, so that the combustion performance is further optimized, and the combustion performance is within the protection scope of the application.

In an embodiment, the second cavity 22 is disposed above the first cavity 21, and the burner further includes a partition 5, where the partition 5 is connected to the flow equalizing barrel 2 to divide the flow equalizing barrel 2 into the first cavity 21 and the second cavity 22. Of course, the first cavity 21 and the second cavity 22 may be arranged left and right, which is also within the scope of the present application.

In one embodiment, the base 1 includes a mounting base 12, an upper plate 13 and a lower plate 14 disposed opposite to each other, a main flow channel 11 is formed between the upper plate 13 and the lower plate 14, and the upper plate 13 is provided with an air outlet 112 of the main flow channel 11. The mounting seat 12 is disposed at the air outlet 112 and connected to the lower plate 14, so as to divide the air outlet 112 into a first flow port 1121 and a second flow port 1122, so that the first flow port 1121 communicates with the first cavity 21, and the second flow port 1122 communicates with the second cavity 22. As shown in fig. 4, the arrows in the figure indicate the flow direction of the mixed gas, specifically, the mounting seat 12 separates the gas outlet 112 of the main flow channel 11, and forms the first flow port 1121 and the second flow port 1122, so that the first cavity 21, the second cavity 22 and the main flow channel 11 are respectively communicated, and the structure is simple, and an intermediate communication structure such as a mixing cavity is not required to be provided in the base 1.

In an embodiment, the mounting base 12 extends into the flow equalizing barrel 2, a flow dividing channel 121 is disposed in the mounting base 12, and the mounting base 12 is connected to the partition 5, so that two ends of the flow dividing channel 121 are respectively communicated with the second flow opening 1122 and the second cavity 22. Specifically, the sidewall of the mounting seat 12 is provided with an inlet 122, so that the inlet 122 is communicated with the second flow port 1122, and part of the mixed gas in the main flow channel 11 enters the split flow channel 121 through the second flow port 1122 and finally enters the second cavity 22.

In an embodiment, the valve body 31 of the diverter valve 3 is connected to the lower plate 14, and the valve core 32 of the diverter valve 3 can abut against the mounting seat 12 to block the diverter channel 121. The valve spool 32 is capable of sliding on the valve body 31 to selectively block the shunt passage 121. The plugging structure of the shunt channel 121 is simple in control mode and good in sealing performance during plugging. The specific structure and working principle of the diverter valve 3 are known in the art, and the description of this embodiment is omitted here.

Specifically, the partition 5 includes a drainage tube 52 and a partition plate 53 disposed around the outer periphery of the drainage tube 52, the partition plate 53 is connected to the inner wall of the flow equalization tube 2, a drainage cavity 51 is disposed in the drainage tube 52, and one end of the drainage tube 52 away from the partition plate 53 is connected to the mounting seat 12, so that two ends of the drainage cavity 51 are respectively communicated with the second cavity 22 and the diversion channel 121. The partition 5 can divide the flow equalizing barrel 2 into an upper flow equalizing barrel 23 and a lower flow equalizing barrel 24, and separate the space in the flow equalizing barrel 2 to form a first cavity 21 and a second cavity 22. The drainage tube 52 positioned in the flow equalizing tube 2 can realize that the second cavity 22 at the upper layer is communicated with the main runner 11 through the flow dividing channel 121, so that the first cavity 21 and the second cavity 22 are not affected by each other. The upper flow equalizing cylinder 23, the lower flow equalizing cylinder 24 and the separating piece 5 can be processed by stainless steel and are fixedly connected into a whole by welding; the lower flow equalizing cylinder 24 can be connected to the base 1 through screws, and the disassembly and assembly are convenient. Of course, the upper flow equalizing cylinder 23 and the lower flow equalizing cylinder 24 may also be integrated, and the partition 5 is sleeved in the middle part of the flow equalizing cylinder 2 to form the first cavity 21 and the second cavity 22.

More specifically, the drainage cartridge 52 is a tapered cartridge with a small diameter end abutting the mounting base 12. The mixed gas enters the drainage cavity 51 through the diversion channel 121 in the mounting seat 12, the inner diameter of the inlet end of the drainage cavity 51 is smaller, the flow speed of the mixed gas is high, and the inner diameter of the outlet end is larger, so that the flow speed of the mixed gas at the outlet end is reduced, the impact on the second cavity 22 is reduced, and the load uniform distribution property of the upper flow equalizing cylinder 23 is further improved.

In an embodiment, the burner further comprises a heat insulation cotton layer 6, the heat insulation cotton layer 6 covers the base 1, and one end of the porous medium shell 4 abuts against the heat insulation cotton layer 6. Because the working temperature of the porous medium shell 4 is higher, the heat insulation cotton layer 6 can isolate the influence of the high temperature of the porous medium shell 4 on the base 1. Further, the heat insulation cotton layer 6 is further provided with a step layer between the porous medium housing 4 and the base 1 to further insulate the porous medium housing 4 from high temperature.

In an embodiment, the burner further comprises a fixing clip 7, wherein a fixing groove 25 is arranged at one end of the flow equalizing barrel 2 away from the base 1, and the fixing clip 7 is clamped in the fixing groove 25 to press the porous medium housing 4 against the base 1, as shown in fig. 1. In this embodiment, the fixing clip 7 is composed of two crisscross compression bars, and the ends of the compression bars are crimped on the upper end of the porous medium housing 4, so that the porous medium housing 4 is fixed between the fixing clip 7 and the base 1, and shaking is avoided. In another embodiment, as shown in fig. 6, the end of the pressing rod of the fixing clip 7 extends to the outer circumference of the porous medium housing 4 and the porous medium housing 4 is clamped in the fixing clip 7, so that the fixing of the porous medium housing 4 is more firm.

Further, the burner further comprises a flow equalizing baffle 8, the flow equalizing baffle 8 comprises a concave flow guiding surface 81, the flow equalizing baffle 8 is connected to one end of the flow equalizing barrel 2 far away from the base 1 to seal the second cavity 21, and the flow guiding surface 81 is arranged in the flow equalizing barrel 2. Optionally, the concave flow guiding surface 81 forms a cone, and the flow guiding surface 81 can prevent the mixed gas from being concentrated at the top of the second cavity 21, thereby causing the phenomena of overlarge top pressure and uneven load distribution of the upper flow equalizing cylinder 23, and ensuring that the internal pressure of the second cavity 21 is kept balanced.

In an embodiment, the burner further comprises an ignition assembly 9, the ignition assembly 9 being connected to the base 1, the ignition needle 91 of the ignition assembly 9 being directed towards the porous medium housing 4. The mixed gas shuttles inside the porous medium housing 4 and is finally ignited by the ignition needle 91.

The embodiment of the utility model also provides a gas water heating device which comprises the porous medium burner. The porous medium shell 4 realizes the full mixing of the mixed gas in the first cavity 21 and the second cavity 22, reduces the requirement of the gas water heating device on the air-gas mixing ratio, can dispense with components such as a mixing cavity and the like, and relatively simplifies the overall structure of the gas water heating device; moreover, the gas water heating device can realize sectional stable combustion through the burner with the porous medium shell 4, has lower pollutant emission and larger load regulation ratio, and meets the use requirement of users.

In the specific content of the above embodiment, any combination of the technical features may be performed without contradiction, and for brevity of description, all possible combinations of the technical features are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing detailed description of the embodiments presents only a few embodiments of the present utility model, which are described in some detail and are not intended to limit the scope of the present utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. A burner, comprising:

the gas mixing device comprises a base (1), wherein a main runner (11) is arranged in the base (1), and the main runner (11) is used for circulating mixed gas;

the flow equalizing barrel (2) is arranged on the base (1), a first cavity (21) and a second cavity (22) are respectively arranged in the flow equalizing barrel (2), a plurality of air outlet holes (20) which are communicated with the first cavity (21) or the second cavity (22) are arranged on the flow equalizing barrel (2), and the first cavity (21) and the second cavity (22) are respectively communicated with the main runner (11);

the diverter valve (3) is detachably connected to the base (1) and is arranged between the main runner (11) and the second cavity (22), and the diverter valve (3) is used for selectively communicating the main runner (11) with the second cavity (22);

the porous medium shell (4), the porous medium shell (4) is sleeved outside the flow equalizing cylinder (2), and at least covers the air outlet hole (20).

2. The burner according to claim 1, characterized in that the second cavity (22) is arranged above the first cavity (21), the burner further comprising a partition (5), the partition (5) being connected to the flow equalizing barrel (2) to divide the flow equalizing barrel (2) into the first cavity (21) and the second cavity (22).

3. The burner according to claim 2, wherein the base (1) comprises a mounting seat (12), an upper plate (13) and a lower plate (14) which are oppositely arranged, the main flow channel (11) is formed between the upper plate (13) and the lower plate (14), the upper plate (13) is provided with an air outlet (112) of the main flow channel (11), the mounting seat (12) is arranged at the air outlet (112) and is connected with the lower plate (14) so as to divide the air outlet (112) into a first flow port (1121) and a second flow port (1122), the first flow port (1121) is communicated with the first cavity (21), and the second flow port (1122) is communicated with the second cavity (22).

4. A burner according to claim 3, wherein a shunt channel (121) is provided in the mounting base (12), and the mounting base (12) is connected to the partition (5) such that two ends of the shunt channel (121) are respectively communicated with the second circulation port (1122) and the second cavity (22).

5. Burner according to claim 4, characterized in that the valve body (31) of the diverter valve (3) is connected to the lower plate (14), the valve core (32) of the diverter valve (3) being able to abut the mounting seat (12) to block the diverter channel (121).

6. The burner according to claim 4, wherein the partition member (5) comprises a drainage tube (52) and a partition plate (53) which is annularly arranged on the periphery of the drainage tube (52), the partition plate (53) is connected with the inner wall of the flow equalization tube (2), a drainage cavity (51) is arranged in the drainage tube (52), and one end, away from the partition plate (53), of the drainage tube (52) is connected with the mounting seat (12), so that two ends of the drainage cavity (51) are respectively communicated with the second cavity (22) and the flow diversion channel (121).

7. Burner according to any of claims 1-6, characterized in that the burner further comprises a heat insulating cotton layer (6), the heat insulating cotton layer (6) being laid over the base (1), one end of the porous medium housing (4) abutting the heat insulating cotton layer (6).

8. The burner according to any one of claims 1-6, further comprising a fixing clip (7), wherein a fixing groove (25) is provided at an end of the flow equalizing cylinder (2) away from the base (1), and the fixing clip (7) is clipped into the fixing groove (25) to press the porous medium housing (4) against the base (1).

9. Burner according to any of claims 1-6, characterized in that the burner further comprises an ignition assembly (9), the ignition assembly (9) being connected to the base (1), the ignition needle (91) of the ignition assembly (9) being directed towards the porous medium housing (4).

10. A gas water heating device comprising a burner as claimed in any one of claims 1 to 9.