Combustor and gas water heater

Abstract

The utility model discloses a burner and a gas water heater. The combustor comprises a shell, a plurality of first ventilation openings are formed in one side wall of the shell and arranged side by side, and at least one second ventilation opening is further formed in the lower portion of the shell; the multiple fire rows are arranged side by side and arranged in the shell, a secondary air duct is formed between every two adjacent fire rows, the injection sections of the fire rows are connected with the corresponding first ventilation openings, the fire rows are arranged above the second ventilation openings, and the secondary air ducts communicate with the second ventilation openings. The mixing uniformity of gas and air in a fire grate of the combustor is improved, so that the combustion sufficiency of the gas is improved.

Description

Technical Field

[0001] This belongs to the technical field of household appliances, and particularly relates to a burner and a gas water heater. Background Art

[0002] Currently, water heaters are common household appliances in people's daily lives. Water heaters are divided into types such as gas water heaters and electric water heaters. Among them, gas water heaters are widely used because of their convenience in use. Conventional gas water heaters usually include components such as a blower, a burner, a combustion chamber, and a heat exchanger. The burner burns gas in the combustion chamber to heat the water flowing through the heat exchanger.

[0003] As an important component of a gas water heater, Chinese Patent Publication No. CN 114396619 A discloses a burner and a gas water heater that usually include a housing and a plurality of burner ports arranged side by side in the housing. During the use of the burner ports, under the action of the blower, part of the air is introduced into the burner ports by high-speed gas entrainment and mixed with the gas. This part of the air is called primary air; another part of the air enters the burner through the secondary air plate below the burner ports and participates in combustion above the flame holes of the burner ports. This part of the air is called secondary air.

[0004] However, during actual use, since both the primary and secondary air enter through the front air distribution plate, after entering the housing, the air distribution is sufficient in the part close to the air distribution plate, while the air supply is insufficient in the part far from the air distribution plate, which in turn leads to incomplete combustion of the gas. In view of this, how to design a technology to improve the mixing uniformity of gas and air to improve the combustion sufficiency of gas is the technical problem to be solved by the present utility model. Summary of the Utility Model

[0005] The present utility model provides a burner and a gas water heater, which realize improving the mixing uniformity of gas and air in the burner ports of the burner to improve the combustion sufficiency of gas.

[0006] To achieve the above technical objectives, the present utility model is implemented by the following technical solutions:

[0007] In one aspect, the present utility model provides a burner, including:

[0008] A housing, a plurality of first ventilation openings are provided on one side wall of the housing, and the plurality of first ventilation openings are arranged side by side. At least one second ventilation opening is further provided at the lower part of the housing;

[0009] A plurality of burner ports, the plurality of burner ports are arranged side by side and disposed in the housing. A secondary air duct is formed between adjacent two burner ports. The entrainment section of the burner port is connected to the corresponding first ventilation opening. The burner port is arranged above the second ventilation opening, and the secondary air duct is communicated with the second ventilation opening.

[0010] In an embodiment of the present application, a bent surface is formed at the bottom of the outer shell, and the bent surface matches the lower contour of the burner; the second ventilation opening is formed in the bent surface.

[0011] In an embodiment of the present application, an extension portion extending downward is formed at the bottom of the burner, and an injection section is formed on the extension portion;

[0012] A first overlapping portion is formed between the end of the burner away from the injection port of the injection section and the extension portion;

[0013] The bent surface has a first mounting surface and a second mounting surface, the first mounting surface is higher than the second mounting surface, the second ventilation opening includes a first sub-ventilation opening and a second sub-ventilation opening, the first sub-ventilation opening is formed on the first mounting surface, and the second sub-ventilation opening is formed on the second mounting surface;

[0014] Wherein, the first overlapping portion is arranged above the first mounting surface, and the extension portion is arranged above the second mounting surface.

[0015] In an embodiment of the present application, a second overlapping portion is formed between the end of the burner adjacent to the injection port of the injection section and the extension portion;

[0016] The second mounting plate has a third mounting surface, the third mounting surface is higher than the second mounting surface, and the second mounting surface is located between the first mounting surface and the third mounting surface;

[0017] The second ventilation opening includes a third sub-ventilation opening, and the third sub-ventilation opening is formed on the third mounting surface;

[0018] Wherein, the second overlapping portion is arranged above the third mounting surface.

[0019] In an embodiment of the present application, a plurality of the first sub-ventilation openings arranged side by side are provided on the first mounting surface;

[0020] And / or, the first sub-ventilation opening is a strip-shaped hole, and the first sub-ventilation opening extends along the length direction of the burner and is located on one side of the burner.

[0021] In an embodiment of the present application, a plurality of the second sub-ventilation openings arranged side by side are provided on the second mounting surface, the second sub-ventilation opening is a strip-shaped hole, and the second sub-ventilation opening extends along the length direction of the burner;

[0022] Or, at least one of the second sub-ventilation openings is provided on the second mounting surface, and the second sub-ventilation opening extends along a direction perpendicular to the length direction of the burner.

[0023] In an embodiment of the present application, a plurality of third sub-air vents arranged side by side are provided on the third mounting surface;

[0024] And / or, the third sub-air vent is a strip-shaped hole, and the third sub-air vent extends along the length direction of the burner.

[0025] In an embodiment of the present application, the housing includes a first mounting plate, a second mounting plate and a bottom plate. The cross-section of the first mounting plate is a U-shaped structure. The second mounting plate is connected between the two end portions of the first mounting plate. The first mounting plate and the second mounting plate form an annular enclosure, and the bottom plate is arranged at the bottom of the second mounting plate;

[0026] Wherein, the first ventilation opening is provided on the second mounting plate, and the second ventilation opening is provided on the bottom plate.

[0027] In an embodiment of the present application, the housing further includes a lining plate. The lining plate is arranged on the inner wall of the first mounting plate and is arranged outside the burner;

[0028] A positioning portion extending towards the second mounting plate is provided at a portion of the lining plate opposite to the second mounting plate, and a plurality of positioning slots are provided at the edge of the positioning portion;

[0029] Wherein, the burner is stuck in the corresponding positioning slot.

[0030] On the other hand, an embodiment of the present application further provides a gas water heater, including a casing, and further including the above-mentioned burner, and the burner is located in the casing.

[0031] By providing a second ventilation opening at the bottom of the housing, the second ventilation opening arranged at the bottom of the burner can be distributed according to the requirements of secondary ventilation. Furthermore, during use, it can ensure that the secondary air is evenly distributed at different positions of the burner, so as to improve the uniformity of the gas-air mixture and improve the gas combustion sufficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0033] Figure 1 It is one of the structural schematic diagrams of the burner embodiment of the present invention;

[0034] Figure 2 It is the second structural schematic diagram of the burner embodiment of the present invention;

[0035] Figure 3 This is the third schematic structural diagram of the burner embodiment of the present utility model;

[0036] Figure 4 It is Figure 1 the schematic structural diagram of the first mounting plate in

[0037] Figure 5 It is Figure 1 the schematic structural diagram of the second mounting plate in

[0038] Figure 6 It is Figure 1 the schematic structural diagram of the inner lining plate in

[0039] Figure 7 This is one of the assembly diagrams of the burner row and the outer shell in the burner embodiment of the present utility model;

[0040] Figure 8 This is the second assembly diagram of the burner row and the outer shell in the burner embodiment of the present utility model;

[0041] Figure 9 This is one of the schematic structural diagrams of one embodiment of the burner row of the present utility model;

[0042] Figure 10 This is the second schematic structural diagram of one embodiment of the burner row of the present utility model;

[0043] Figure 11 This is the cross-sectional view of one embodiment of the burner row of the present utility model;

[0044] Figure 12 This is the third schematic structural diagram of one embodiment of the burner row of the present utility model;

[0045] Figure 13 It is Figure 12 the partial enlarged schematic diagram of area A in Detailed implementation manners

[0046] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0047] It should be noted that in the description of the present utility model, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0048] In the present utility model, unless otherwise clearly defined and limited, the terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0049] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature can include the direct contact between the first and second features, or can also include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on the top" of the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under the bottom" of the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0050] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0051] A gas water heater is a water heater that uses gas as the main energy material and transfers the high-temperature heat generated by gas combustion to the cold water flowing through the heat exchanger to achieve the purpose of preparing hot water.

[0052] A gas water heater generally includes a housing, and components such as a burner, a heat exchanger, a blower, and a wind hood disposed within the housing.

[0053] Among them, gas is delivered to the burner, and the gas is ignited by an ignition device so that the burner burns the delivered gas, thereby generating heat.

[0054] The heat exchanger is provided with heat exchange tubes. One end of the heat exchange tube is connected to the water supply pipeline, and the other end of the heat exchange tube is connected to a shower head or a faucet, etc.

[0055] The heat generated by the burner burning gas is used to heat the heat exchange tubes, so that the water temperature in the heat exchange tubes rises to form hot water.

[0056] When the gas water heater is working, the cold water provided by the water supply pipeline flows into the heat exchange tubes, and then is heated by the heat source generated by the burner into hot water, and then flows out from the shower head or the faucet through the hot water valve for the user to use.

[0057] At the same time, during the operation of the gas water heater, the blower is powered on and operates simultaneously. Under the action of the blower, the flue gas generated by the burner is discharged outdoors.

[0058] As Figures 1-8 shown, in an embodiment of the present application, a burner is provided, including: a housing 2 and a plurality of burner ports 1. The plurality of burner ports 1 are arranged side by side and disposed in the housing 2. The burner port 1 has an ejector section for introducing gas and primary air for combustion.

[0059] In the first embodiment, in order to improve the uniform distribution of the secondary air of the burner port 1 to ensure uniform mixing of gas and air at each position of the burner port 1 to improve the full combustion of the gas, the following structural improvements are made to the housing 2 and the burner port 1.

[0060] A plurality of first ventilation openings 201 are provided on one side wall of the housing 2. The plurality of first ventilation openings 201 are arranged side by side, and at least one second ventilation opening 202 is further provided at the lower part of the housing 2;

[0061] A secondary air duct is formed between two adjacent burner ports 1. The ejector section of the burner port 1 is connected to the corresponding first ventilation opening 201. The burner port 1 is arranged above the second ventilation opening 202, and the secondary air duct is communicated with the second ventilation opening 202.

[0062] Specifically, after the burner row 1 is installed in the housing 2, the air intake of the injection section of the burner row 1 is butted against the first vent 201 on the housing 2, and the gas is mixed with the primary air and enters the air intake through the first vent hole. After the gas and the primary air are mixed in the burner row 1 and output from the air outlet holes of the burner row 1 and ignited, the secondary air is introduced into the housing 2 through the second vent 202 provided at the bottom of the housing 2. Moreover, since the second vent 202 is arranged at the bottom of the housing 2, the opening design can be conveniently carried out according to the demand for the secondary air at different positions of the burner row 1, so as to ensure that the secondary air can be more evenly distributed at the air outlet holes at various positions of the burner row 1, thereby realizing the full mixing of the gas and the secondary air and improving the combustion efficiency.

[0063] After the secondary air enters the housing 2 through the second vent 202, it enters the secondary air duct formed between the burner rows 1, and the secondary air will flow along the secondary air duct to the air outlet holes of the burner row 1.

[0064] In some embodiments, a bent surface is formed at the bottom of the housing 2, and the bent surface matches the lower contour of the burner row 1; the second vent 202 is formed on the bent surface.

[0065] Specifically, for the burner row 1, its top is usually flat due to the configuration of the air outlet holes, while there is a height difference at the bottom of the burner row 1 due to the pressing design. Therefore, in order to ensure that the air flow entering the housing 2 through different second vents 202 can quickly enter the corresponding parts of the secondary air duct, the bottom of the housing 2 is designed as a bent surface, so that the bent surface matches the bottom contour of the burner row 1, thereby reducing the formation of a large gap space at the bottom of the burner row 1 and affecting the air intake of the secondary air duct.

[0066] In one embodiment, an extension portion 101 extending downward is formed at the bottom of the burner row 1, and the injection section is formed on the extension portion 101;

[0067] A first overlapping portion 102 is formed between the end of the burner row 1 far from the air intake of the injection section and the extension portion 101;

[0068] The bent surface has a first mounting surface 203 and a second mounting surface 204, the first mounting surface 203 is higher than the second mounting surface 204, the second vent 202 includes a first sub-vent 2021 and a second sub-vent 2022, the first sub-vent 2021 is formed on the first mounting surface 203, and the second sub-vent 2022 is formed on the second mounting surface 204;

[0069] Wherein, the first overlapping portion 102 is arranged above the first mounting surface 203, and the extension portion 101 is arranged above the second mounting surface 204.

[0070] Specifically, for the structural design requirements of the burner panel 1 for profiling, an extension part 101 is provided at its bottom to form an ejection section. At this time, a height difference is easily generated between the end of the burner panel 1 far from the ejection port and the extension parts 101 to form a first overlapping part 102. In order to ensure the air intake volume, for the part of the secondary air duct in the area between the two first overlapping parts 102 of two adjacent burner panels 1, the bent surface can be made to form a first installation surface 203 to closely adhere to the bottom of the first overlapping part 102. In this way, both the installation requirements can be met, and the secondary air introduced through the first sub-air outlet 2021 on the first installation surface 203 can directly enter the secondary air duct where the first overlapping part 102 is located, so as to ensure sufficient supply of secondary air.

[0071] In another embodiment, a second overlapping part 103 is formed between the end of the burner panel 1 adjacent to the ejection port of the ejection section and the extension part 101;

[0072] The second mounting plate 22 has a third mounting surface 205, the third mounting surface 205 is higher than the second mounting surface 204, and the second mounting surface 204 is located between the first mounting surface 203 and the third mounting surface 205;

[0073] The second air vent 202 includes a third sub-air outlet 2023, and the third sub-air outlet 2023 is formed on the third mounting surface 205;

[0074] Among them, the second overlapping part is arranged above the third mounting surface 205.

[0075] Specifically, for the end of the burner panel 1 close to the ejection section, a second overlapping part 103 is correspondingly formed for installation, and the second overlapping part 103 is overlapped on the third mounting surface 205. At the same time, in order to meet the requirement of sufficient supply of secondary air at the second overlapping part 103 of the secondary air duct, a third sub-air outlet 2023 is also provided on the third mounting surface 205, and the third sub-air outlet 2023 is adjacent to the bottom of the second overlapping part 103, so that the secondary air introduced through the third sub-air outlet 2023 can directly enter the secondary air duct. In this way, sufficient supply of secondary air can be obtained at each position of the burner panel 1, so as to improve the mixing uniformity of gas and air, and further improve the combustion sufficiency of gas.

[0076] In some embodiments, a plurality of the first sub-air outlets 2021 arranged side by side are provided on the first mounting surface 203 to supply secondary air evenly distributed at the bottom of each burner panel 1 through the plurality of first sub-air outlets 2021. Among them, the first sub-air outlet 2021 can also be designed as a strip-shaped hole, and the first sub-air outlet 2021 extends along the length direction of the burner panel 1 and is located on one side of the burner panel 1.

[0077] In some embodiments, a plurality of second sub-air vents 2022 arranged side by side are provided on the second mounting surface 204. The second sub-air vents 2022 are strip-shaped holes, and the second sub-air vents 2022 extend along the length direction of the burner row 1. Specifically, there can be a plurality of second sub-air vents 2022, and the second sub-air vents 2022 also extend along the length direction of the burner row 1.

[0078] Alternatively, at least one second sub-air vent 2022 is provided on the second mounting surface 204, and the second sub-air vent 2022 extends in a direction perpendicular to the length direction of the burner row 1. Specifically, the second sub-air vent 2022 can be one and occupy sufficient space on the second mounting surface 204 to meet the secondary air intake requirements in a large area at the bottom of multiple rows of burner rows 1.

[0079] In some embodiments, a plurality of third sub-air vents 2023 arranged side by side are provided on the third mounting surface 205 to supply secondary air evenly at the bottoms of the respective burner rows 1 through the plurality of third sub-air vents 2023. Among them, the third sub-air vents 2023 can also be designed as strip-shaped holes, and the third sub-air vents 2023 extend along the length direction of the burner row 1.

[0080] By providing the second ventilation opening 202 at the bottom of the housing 2, the second ventilation opening 202 is arranged at the bottom of the burner row 1 and can be distributed according to the requirements of secondary ventilation. Thus, during use, it can be ensured that the secondary air is evenly distributed at different positions of the burner row 1 to improve the mixing uniformity of gas and air and enhance the full combustion of gas.

[0081] Embodiment 2, as Figures 1-8 shown, for the burner row 1, a plurality of burner rows 1 need to be assembled into the housing 2 side by side in sequence. In order to reduce the usage amount of parts, lower the manufacturing cost, and improve the assembly efficiency, the following structural improvements are made to the housing 2 and the burner row 1.

[0082] The housing 2 includes an annular enclosure and a bottom plate 23. A plurality of first ventilation openings 201 are provided on one side wall of the annular enclosure. A positioning rib 206 is provided on the inner surface of the annular enclosure around the outer periphery of the first ventilation openings 201; the bottom plate 23 is provided at the bottom of the annular enclosure, and a plurality of installation slots 207 are provided on the bottom plate 23, and the installation slots 207 are arranged opposite to the corresponding positioning ribs 206;

[0083] A plurality of burner rows 1 are arranged side by side and provided in the housing 2. The injection ports of the injection sections of the burner rows 1 are connected to the corresponding positioning ribs 206, and the burner rows 1 are also stuck in the corresponding installation slots 207.

[0084] The positioning rib 206 is of an annular structure and is inserted into the ejector port.

[0085] Specifically, during the assembly process, the ejector ports of multiple burner panels 1 are docked with the positioning rib 206 to position the ejector ports of the burner panel 1 through the positioning rib 206. Then, the end of the burner panel 1 away from the positioning rib 206 is stuck in the positioning slot 208. In this way, the burner panel 1 can be installed only by using the assembly structure in the housing 2, and thus there is no need to additionally configure an independent mounting bracket to install the burner panel 1, reducing the number of parts and improving the assembly efficiency.

[0086] In some embodiments, the annular enclosure includes a first mounting plate 21 and a second mounting plate 22. The cross-section of the first mounting plate 21 is a U-shaped structure. The second mounting plate 22 is connected between the two end portions of the first mounting plate 21, and the bottom plate 23 is disposed at the bottom of the second mounting plate 22;

[0087] Wherein, the first ventilation opening 201 and the positioning rib 206 are provided on the second mounting plate 22.

[0088] Specifically, for the annular enclosure, it is a split structure. The first mounting plate 21 is in a semi-surrounding structure, and the second mounting plate 22 is provided with the first ventilation opening 201 to meet the intake requirements of gas and primary air.

[0089] In another embodiment, the housing 2 further includes a lining plate 24, and the lining plate 24 is disposed on the inner wall of the first mounting plate 21 and arranged outside the burner panel 1;

[0090] A positioning portion extending towards the second mounting plate 22 is provided at a position on the lining plate 24 opposite to the second mounting plate 22, and a plurality of positioning slots 208 are provided at the edge of the positioning portion;

[0091] Wherein, the burner panel 1 is stuck in the corresponding positioning slot 208.

[0092] Specifically, in order to reduce the heat conduction from the inside of the housing 2 to the outside when the burner panel 1 burns, a lining plate 24 is further provided inside the housing 2 for heat insulation. An air interlayer is formed between the lining plate 24 and the housing 2 to play a role in heat insulation.

[0093] Moreover, by further providing the positioning slots 208 on the lining plate 24, the positioning slots 208 can position the end of the burner panel 1 away from the ejector port, thereby more effectively improving the installation accuracy and reliability of the burner panel 1.

[0094] In some embodiments, in order to facilitate the installation of the inner lining plate 24 on the outer shell 2, a positioning tongue 211 extending inward and upward is further provided on the first mounting plate 21, and the lower edge of the inner lining plate 24 is clamped between the positioning tongue 211 and the first mounting plate 21.

[0095] Specifically, when installing the inner lining plate 24, the inner lining plate 24 is placed inside the first mounting plate 21 and pre-positioned and supported by the positioning tongue 211. Then, the upper part of the inner lining plate 24 can be fixedly connected to the first mounting plate 21 by reduced screws.

[0096] In another embodiment, the positioning ribs 206, the mounting slots 207, and the positioning slots 208 connected and cooperated with the same burner 1 are arranged in sequence.

[0097] Specifically, after the burner 1 is assembled in place, the two end portions of the burner 1 will be position-limited and fixed by the positioning ribs 206 and the positioning slots 208, and the bottom of the burner 1 can be further supported and fixed by the mounting slots 207. In this way, the burner 1 can be firmly assembled into the outer shell 2.

[0098] Among them, the positioning slot 208 is arranged obliquely above the mounting slot 207.

[0099] In another embodiment, a second vent 202 is provided on the bottom plate 23 to meet the supply requirement of secondary air through the second vent 202.

[0100] Embodiment 3, as Figures 9-13 shown, based on the above Embodiment 1 and Embodiment 2, optionally, the following structural improvements are made to the burner.

[0101] An ejection section 11, a mixing section 12, and a diffuser section 16 are provided at the bottom of the burner 1. An air outlet cavity 13 is provided at the top of the burner 1. The ejection section 11 is communicated with the air outlet cavity 13 through the mixing section 12 and the diffuser section 16. An air suction hole 14 is further provided on the burner 1. The air suction hole 14 is communicated with the mixing section 12 and is arranged close to the ejection section 11. A flow guide plate 15 is further provided on the inner wall of the mixing section 12. The flow guide plate 15 is arranged on one side of the air suction hole 14;

[0102] Among them, the flow guide plate 15 is configured to guide the gas outside the burner into the mixing section 12 and guide the formation of a spiral air flow.

[0103] Specifically, the ejection section 11 provided at the bottom of the burner 1 is used for injecting gas and primary air into the burner 1. After the gas and primary air enter the burner 1 through the ejection section 11, the gas and primary air are mixed and transported to the mixing section 12.

[0104] Since the mixing section 12 is provided with air suction holes 14, and a flow guide plate 15 is arranged on the inner wall of the mixing section 12 in cooperation with the air suction holes 14, for the mixed gas flow formed by the fuel gas and the primary air flowing through the position of the flow guide plate 15, since the flow guide plate 15 protrudes from the inner wall of the mixing section 12 and is arranged inside the air suction holes 14, there is a velocity difference between the high-speed flowing mixed gas in the mixing section 12 and the gas near the air suction holes 14 on the outer side of the burner 1. Due to the velocity difference causing a pressure difference, the gas near the air suction holes 14 is sucked into the mixing section 12 of the burner 1 and forms a spiral gas flow under the guidance of the flow guide plate 15, further improving the uniformity of the mixing of the fuel gas and the air.

[0105] During the actual use process, when the gas outside the burner 1 enters the mixing section 12 of the burner 1 through the side air suction holes 14, due to the velocity difference with the gas in the mixing section 12, a shear force is generated, thus forming small vortices at the air suction holes, which can promote the mixing of the fuel gas and the air and can also effectively prevent the mixed gas from flowing out of the air suction holes and causing leakage.

[0106] The flue gas generated by combustion can enter the burner through the air suction port and mix with the fuel gas and the primary air. After the flue gas enters the burner 1, it can reduce the oxygen content of the mixed gas in the mixing section 12, thereby reducing the combustion temperature, and the content of thermal type nitrogen oxides will also decrease accordingly.

[0107] Because thermal type nitrogen oxides are generated by the reaction of nitrogen and oxygen in a high-temperature environment, and the higher the temperature, the more thermal type nitrogen oxides are generated. Therefore, reducing the oxygen content and the combustion temperature can effectively reduce the generation of thermal type nitrogen oxides. Therefore, by realizing the flue gas recirculation in the combustion chamber through the air suction holes 14, the content of nitrogen oxides in the flue gas can be effectively reduced, achieving low nitrogen emissions.

[0108] The burner 1 provided by the present application aims to improve the mixing uniformity of the fuel gas and the air in the burner 1, adjust the ratio of the primary and secondary air, and reduce the content of nitrogen oxides in the flue gas, and the air suction holes 14 and the flow guide plate 15 are arranged on the burner 1.

[0109] In addition, part of the secondary air can enter the burner 1 through the air suction holes 14 and the flow guide plate 15 and become primary air, so a new method for adjusting the ratio of the primary and secondary air is provided.

[0110] Furthermore, part of the flue gas can also enter the burner 1 through the air suction holes 14 and the flow guide plate 15 to realize flue gas recirculation, reduce the oxygen concentration, and reduce the combustion temperature to reduce the content of nitrogen oxides. Therefore, by arranging the air suction holes 14 and the flow guide plate 15, the three problems of improving the mixing uniformity of the fuel gas and the air in the burner 1, adjusting the ratio of the primary and secondary air, and reducing the content of nitrogen oxides in the flue gas can be realized simultaneously. It is simple and feasible, with remarkable effects, can effectively improve the working performance of the gas water heater, and can effectively reduce the content of pollutants.

[0111] In one embodiment of the present application, the air intake holes 14 are formed on the fire bar 1 by stamping, and the portion of the fire bar 1 that is stamped into the mixing section 12 forms the guide plate 15 .

[0112] Specifically, in order to facilitate the formation of the air intake holes 14 and the guide plate 15 on the fire grate 1, since the fire grate 1 is generally made of sheet metal, when processing the fire grate 1, the air intake holes 14 can be punched out on the sheet metal by stamping, and the protruding portion of the air intake holes 14 formed by the punching forms the guide plate 15.

[0113] In one embodiment of the present application, the fixed end of the guide plate 15 is fixedly connected to the fire bar 1 , and the free end of the guide plate 15 extends obliquely in a direction away from the air intake hole 14 .

[0114] Specifically, due to the speed difference between the high-speed airflow in the mixing section and the gas outside the air suction hole 14, a pressure difference is formed at the air suction hole 14 to suck the gas outside the fire row. Since the guide plate 15 is in a tilted structure on the inner wall of the mixing section 12, the guide plate 15 guides the gas outside the fire row to enter the mixing section 12 of the fire row through the air suction hole 14 and guides it to form a spiral airflow.

[0115] In one embodiment of the present application, the fixed end of the guide plate 15 is close to the ejection section 11 , and the free end of the guide plate 15 extends in a direction away from the ejection section 11 .

[0116] Specifically, in order to guide the airflow entering the mixing section 12 through the guide plate 15 , the fixed end of the guide plate 15 is close to the introduction section 11 so that the airflow entering the mixing section 12 flows from the fixed end of the guide plate 15 along the surface of the guide plate 15 .

[0117] There are at least three reasons to prevent the mixed gas from leaking out: first, it is blocked by the guide plate; second, it is to use the pressure difference caused by the speed difference between the high-speed airflow in the mixing section 12 and the gas outside the air intake hole 14; third, it is a small vortex near the air intake hole 14. In this way, the mixed gas flow in the mixing section 12 can be more effectively blocked from overflowing.

[0118] In one embodiment of the present application, the air intake holes 14 are strip-shaped holes, and the air intake holes 14 are arranged obliquely along the air flow direction in the mixing section 12 .

[0119] Specifically, there is a speed difference between the high-speed mixed gas flowing in the mixing section 12 and the gas near the air intake holes 14 outside the fire grate 1, resulting in a pressure difference at the air intake holes, which sucks the gas near the air intake holes 14 outside the fire grate 1 into the mixing section 12 of the fire grate 1.

[0120] Since the air inlet holes are arranged obliquely with respect to the mixed gas flow in the mixing section, the gas entering the mixing section flows obliquely with respect to the mixed gas flow via the flow guiding plate. In this way, a spiral gas flow can be formed in the mixing section, and this spiral gas flow can promote the full mixing of the fuel gas and air, and improve the mixing uniformity of the fuel gas and air at the flame holes of the burner 1 and the flame stability.

[0121] In an embodiment of the present application, the air inlet holes 14 and the flow guiding plates 15 arranged on one side of the burner 1 extend obliquely upward along the gas flow direction in the mixing section 12, and the air inlet holes 14 and the flow guiding plates 15 arranged on the other side of the burner 1 extend obliquely downward along the gas flow direction in the mixing section 12.

[0122] Specifically, air inlet holes 14 and flow guiding plates 15 are respectively arranged on both sides of the burner 1 in the mixing section 12, and the inclined extension directions of the air inlet holes 14 and the flow guiding plates 15 distributed on both sides are processed in opposite directions.

[0123] After the gas outside the burner 1 is sucked into the mixing section of the burner 1 by the air inlet holes on both sides, the gas sucked on both sides flows in opposite directions in the mixing section (refer to the gas flow direction entering the mixing section shown by the arrows in Figure 13 ), thereby enabling the mixed gas in the mixing section to flow in a spiral as a whole, ensuring the mixing uniformity of the fuel gas and air to the greatest extent.

[0124] That is, through the flow guiding plates 15 located on both sides in the mixing section 12, the gas outside the burner can be guided to be sucked into the mixing section 12 through the air inlet holes 14, and the sucked gas is mixed with the gas flow input from the ejector section 11 into the mixing section 12 and forms a spiral gas flow in a spiral conveying manner.

[0125] In an embodiment of the present application, a plurality of the air inlet holes 14 are arranged side by side on the burner 1 along the gas flow direction in the mixing section 12.

[0126] In an embodiment of the present application, a plurality of the air inlet holes 14 are arranged side by side on the burner 1 along a direction perpendicular to the gas flow direction in the mixing section 12.

[0127] In an embodiment of the present application, a plurality of air inlet holes 14 are arranged in an array on the burner 1.

[0128] In another embodiment of the present application, for the tilting angle of the flow guiding plate 15 tilted up in the mixing section 12, corresponding adjustment can be made as needed, and no limitation is made here.

[0129] In another embodiment of the present application, for the burner, it may be only configured with an injection section 11 and a diffuser section 16, that is, the injection section 11 is connected to the diffuser section 16. Correspondingly, the air intake holes 14 and the deflector 15 are formed on the diffuser section 16, and the deflector 15 is configured to guide the gas outside the burner into the diffuser section 16 and guide the formation of a spiral air flow.

[0130] The air flow mode of arranging the air intake holes 14 and the deflector 15 on the diffuser section 16 is similar to the air flow mode of arranging the air intake holes 14 and the deflector 15 in the mixing section in the above embodiment, and will not be elaborated here.

[0131] On the other hand, an embodiment of the present application further provides a gas water heater, including: the burner in the above embodiment.

[0132] Specifically, a gas water heater generally includes a housing, a heat exchanger and a burner arranged in the housing. Among them, a corresponding fan needs to be configured in the housing to drive air into the burner, and at the same time, the fan is used to drive the flue gas in the combustion chamber to be discharged to the outside.

[0133] By providing air intake holes 14 on the burner 1 that communicate with the mixing section 12 or the diffuser section 16. Taking the mixing section 12 configured with air intake holes and a deflector as an example, during use, there is a speed difference between the high-speed flowing mixed gas in the mixing section 12 and the gas near the air intake holes 14 outside the burner 1. Due to the pressure difference caused by the speed difference, the gas near the air intake holes 14 is sucked into the mixing section 12 of the burner 1 and forms a spiral air flow under the guidance of the deflector 15.

[0134] In this way, the gas outside the burner 1 can be further sucked into the mixing section 12 to increase the amount of air mixed with the gas. Moreover, the air flow in the mixing section 12 under the guiding action of the deflector 15 enables the air to be mixed more evenly with the gas. The evenly mixed air flow enters the air outlet cavity 13 and finally burns to release heat. Since the mixed gas in the air outlet cavity 13 is more evenly mixed, the flame distribution of the burner 1 burning is uniform, realizing improving the gas-air mixing uniformity in the burner burner to improve the gas combustion sufficiency.

[0135] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, for those of ordinary skill in the art, it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions required to be protected by the present invention.

Claims

1. A burner, characterized in that, Comprising: A housing, on one side wall of which there are provided a plurality of first ventilation openings arranged side by side, and at least one second ventilation opening is further provided at the lower part of the housing; A plurality of burner ports arranged side by side and disposed in the housing, a secondary air duct is formed between adjacent two of the burner ports, the injection section of the burner port is connected to the corresponding first ventilation opening, the burner port is disposed above the second ventilation opening, and the secondary air duct is communicated with the second ventilation opening.

2. The burner according to claim 1, characterized in that, A bent surface is formed at the bottom of the housing, and the bent surface matches the lower contour of the burner port; the second ventilation opening is formed on the bent surface.

3. The burner according to claim 2, characterized in that, The bottom of the burner port forms an extension part extending downward, and the injection section is formed on the extension part; A first overlapping part is formed between the end of the burner port far from the injection opening of the injection section and the extension part; The bent surface has a first mounting surface and a second mounting surface, the first mounting surface is higher than the second mounting surface, the second ventilation opening includes a first sub-air outlet and a second sub-air outlet, the first sub-air outlet is formed on the first mounting surface, and the second sub-air outlet is formed on the second mounting surface; Wherein, the first overlapping part is disposed above the first mounting surface, and the extension part is disposed above the second mounting surface.

4. The burner according to claim 3, characterized in that, A second overlapping part is formed between the end of the burner port adjacent to the injection opening of the injection section and the extension part; The housing includes a first mounting plate, a second mounting plate and a bottom plate, the cross section of the first mounting plate is a U-shaped structure, the second mounting plate is connected between the two end parts of the first mounting plate, the first mounting plate and the second mounting plate form an annular enclosure, and the bottom plate is disposed at the bottom of the second mounting plate; the second mounting plate has a third mounting surface, the third mounting surface is higher than the second mounting surface, and the second mounting surface is located between the first mounting surface and the third mounting surface; The second ventilation opening includes a third sub-air outlet, and the third sub-air outlet is formed on the third mounting surface; Wherein, the second overlapping part is disposed above the third mounting surface.

5. The burner according to claim 3, characterized in that, A plurality of the first sub-air outlets arranged side by side are provided on the first mounting surface; And / or, the first sub-air outlet is a strip-shaped hole, and the first sub-air outlet extends along the length direction of the burner port and is located on one side of the burner port.

6. The burner according to claim 3, characterized in that, A plurality of the second sub-air outlets arranged side by side are provided on the second mounting surface, the second sub-air outlet is a strip-shaped hole, and the second sub-air outlet extends along the length direction of the burner port; Or, at least one of the second sub-air outlets is provided on the second mounting surface, and the second sub-air outlet extends along a direction perpendicular to the length direction of the burner port.

7. The burner according to claim 4, characterized in that, A plurality of the third sub-air outlets arranged side by side are provided on the third mounting surface; And / or, the third sub-air outlet is a strip-shaped hole, and the third sub-air outlet extends along the length direction of the burner port.

8. The burner according to claim 4, characterized in that, The first ventilation opening is provided on the second mounting plate, and the second ventilation opening is provided on the bottom plate.

9. The burner according to claim 8, characterized in that, The housing further includes a lining plate, and the lining plate is disposed on the inner wall of the first mounting plate and is arranged outside the burner port; A positioning portion extending toward the second mounting plate is provided at a position on the inner lining plate opposite to the second mounting plate, and a plurality of positioning card slots are provided at the edge of the positioning portion; Wherein, the burner is clamped in the corresponding positioning card slot.

10. A gas water heater, comprising a casing, characterized in that, Further included is a burner according to any one of claims 1-9, and the burner is located in the casing.

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